3487 lines
138 KiB
Java
3487 lines
138 KiB
Java
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package androidx.fragment.app;
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import android.animation.Animator;
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import android.animation.AnimatorInflater;
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import android.animation.AnimatorListenerAdapter;
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import android.app.Activity;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.os.Bundle;
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import android.os.Looper;
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import android.os.Parcelable;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.util.SparseArray;
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import android.view.LayoutInflater;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.animation.AlphaAnimation;
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import android.view.animation.Animation;
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import android.view.animation.AnimationSet;
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import android.view.animation.AnimationUtils;
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import android.view.animation.DecelerateInterpolator;
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import android.view.animation.Interpolator;
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import android.view.animation.ScaleAnimation;
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import android.view.animation.Transformation;
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import androidx.activity.OnBackPressedCallback;
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import androidx.activity.OnBackPressedDispatcher;
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import androidx.activity.OnBackPressedDispatcherOwner;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.collection.ArraySet;
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import androidx.core.util.DebugUtils;
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import androidx.core.util.LogWriter;
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import androidx.core.view.OneShotPreDrawListener;
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import androidx.lifecycle.Lifecycle;
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import androidx.lifecycle.LifecycleOwner;
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import androidx.lifecycle.ViewModelStore;
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import androidx.lifecycle.ViewModelStoreOwner;
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import java.io.FileDescriptor;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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/**
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* Container for fragments associated with an activity.
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*/
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final class FragmentManagerImpl extends FragmentManager implements LayoutInflater.Factory2 {
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static boolean DEBUG = false;
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static final String TAG = "FragmentManager";
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static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state";
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static final String TARGET_STATE_TAG = "android:target_state";
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static final String VIEW_STATE_TAG = "android:view_state";
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static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint";
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private static final class FragmentLifecycleCallbacksHolder {
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final FragmentLifecycleCallbacks mCallback;
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final boolean mRecursive;
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FragmentLifecycleCallbacksHolder(FragmentLifecycleCallbacks callback, boolean recursive) {
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mCallback = callback;
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mRecursive = recursive;
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}
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}
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ArrayList<OpGenerator> mPendingActions;
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boolean mExecutingActions;
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int mNextFragmentIndex = 0;
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final ArrayList<Fragment> mAdded = new ArrayList<>();
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final HashMap<String, Fragment> mActive = new HashMap<>();
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ArrayList<BackStackRecord> mBackStack;
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ArrayList<Fragment> mCreatedMenus;
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private OnBackPressedDispatcher mOnBackPressedDispatcher;
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private final OnBackPressedCallback mOnBackPressedCallback =
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new OnBackPressedCallback(false) {
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@Override
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public void handleOnBackPressed() {
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FragmentManagerImpl.this.handleOnBackPressed();
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}
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};
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// Must be accessed while locked.
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ArrayList<BackStackRecord> mBackStackIndices;
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ArrayList<Integer> mAvailBackStackIndices;
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ArrayList<OnBackStackChangedListener> mBackStackChangeListeners;
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private final CopyOnWriteArrayList<FragmentLifecycleCallbacksHolder>
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mLifecycleCallbacks = new CopyOnWriteArrayList<>();
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int mCurState = Fragment.INITIALIZING;
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FragmentHostCallback mHost;
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FragmentContainer mContainer;
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Fragment mParent;
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@Nullable
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Fragment mPrimaryNav;
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boolean mNeedMenuInvalidate;
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boolean mStateSaved;
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boolean mStopped;
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boolean mDestroyed;
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boolean mHavePendingDeferredStart;
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// Temporary vars for removing redundant operations in BackStackRecords:
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ArrayList<BackStackRecord> mTmpRecords;
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ArrayList<Boolean> mTmpIsPop;
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ArrayList<Fragment> mTmpAddedFragments;
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// Temporary vars for state save and restore.
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Bundle mStateBundle = null;
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SparseArray<Parcelable> mStateArray = null;
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// Postponed transactions.
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ArrayList<StartEnterTransitionListener> mPostponedTransactions;
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private FragmentManagerViewModel mNonConfig;
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Runnable mExecCommit = new Runnable() {
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@Override
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public void run() {
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execPendingActions();
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}
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};
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private void throwException(RuntimeException ex) {
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Log.e(TAG, ex.getMessage());
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Log.e(TAG, "Activity state:");
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LogWriter logw = new LogWriter(TAG);
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PrintWriter pw = new PrintWriter(logw);
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if (mHost != null) {
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try {
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mHost.onDump(" ", null, pw, new String[] { });
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} catch (Exception e) {
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Log.e(TAG, "Failed dumping state", e);
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}
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} else {
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try {
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dump(" ", null, pw, new String[] { });
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} catch (Exception e) {
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Log.e(TAG, "Failed dumping state", e);
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}
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}
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throw ex;
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}
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@NonNull
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@Override
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public FragmentTransaction beginTransaction() {
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return new BackStackRecord(this);
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}
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@Override
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public boolean executePendingTransactions() {
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boolean updates = execPendingActions();
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forcePostponedTransactions();
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return updates;
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}
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private void updateOnBackPressedCallbackEnabled() {
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// Always enable the callback if we have pending actions
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// as we don't know if they'll change the back stack entry count.
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// See handleOnBackPressed() for more explanation
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if (mPendingActions != null && !mPendingActions.isEmpty()) {
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mOnBackPressedCallback.setEnabled(true);
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return;
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}
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// This FragmentManager needs to have a back stack for this to be enabled
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// And the parent fragment, if it exists, needs to be the primary navigation
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// fragment.
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mOnBackPressedCallback.setEnabled(getBackStackEntryCount() > 0
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&& isPrimaryNavigation(mParent));
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}
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/**
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* Recursively check up the FragmentManager hierarchy of primary
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* navigation Fragments to ensure that all of the parent Fragments are the
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* primary navigation Fragment for their associated FragmentManager
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*/
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boolean isPrimaryNavigation(@Nullable Fragment parent) {
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// If the parent is null, then we're at the root host
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// and we're always the primary navigation
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if (parent == null) {
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return true;
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}
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FragmentManagerImpl parentFragmentManager = parent.mFragmentManager;
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Fragment primaryNavigationFragment = parentFragmentManager
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.getPrimaryNavigationFragment();
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// The parent Fragment needs to be the primary navigation Fragment
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// and, if it has a parent itself, that parent also needs to be
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// the primary navigation fragment, recursively up the stack
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return parent == primaryNavigationFragment
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&& isPrimaryNavigation(parentFragmentManager.mParent);
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}
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@SuppressWarnings("WeakerAccess") /* synthetic access */
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void handleOnBackPressed() {
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// First, execute any pending actions to make sure we're in an
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// up to date view of the world just in case anyone is queuing
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// up transactions that change the back stack then immediately
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// calling onBackPressed()
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execPendingActions();
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if (mOnBackPressedCallback.isEnabled()) {
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// We still have a back stack, so we can pop
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popBackStackImmediate();
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} else {
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// Sigh. Due to FragmentManager's asynchronicity, we can
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// get into cases where we *think* we can handle the back
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// button but because of frame perfect dispatch, we fell
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// on our face. Since our callback is disabled, we can
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// re-trigger the onBackPressed() to dispatch to the next
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// enabled callback
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mOnBackPressedDispatcher.onBackPressed();
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}
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}
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@Override
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public void popBackStack() {
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enqueueAction(new PopBackStackState(null, -1, 0), false);
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}
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@Override
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public boolean popBackStackImmediate() {
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checkStateLoss();
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return popBackStackImmediate(null, -1, 0);
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}
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@Override
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public void popBackStack(@Nullable final String name, final int flags) {
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enqueueAction(new PopBackStackState(name, -1, flags), false);
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}
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@Override
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public boolean popBackStackImmediate(@Nullable String name, int flags) {
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checkStateLoss();
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return popBackStackImmediate(name, -1, flags);
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}
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@Override
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public void popBackStack(final int id, final int flags) {
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if (id < 0) {
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throw new IllegalArgumentException("Bad id: " + id);
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}
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enqueueAction(new PopBackStackState(null, id, flags), false);
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}
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@Override
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public boolean popBackStackImmediate(int id, int flags) {
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checkStateLoss();
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execPendingActions();
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if (id < 0) {
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throw new IllegalArgumentException("Bad id: " + id);
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}
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return popBackStackImmediate(null, id, flags);
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}
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/**
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* Used by all public popBackStackImmediate methods, this executes pending transactions and
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* returns true if the pop action did anything, regardless of what other pending
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* transactions did.
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*
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* @return true if the pop operation did anything or false otherwise.
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*/
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private boolean popBackStackImmediate(String name, int id, int flags) {
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execPendingActions();
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ensureExecReady(true);
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if (mPrimaryNav != null // We have a primary nav fragment
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&& id < 0 // No valid id (since they're local)
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&& name == null) { // no name to pop to (since they're local)
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final FragmentManager childManager = mPrimaryNav.getChildFragmentManager();
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if (childManager.popBackStackImmediate()) {
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// We did something, just not to this specific FragmentManager. Return true.
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return true;
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}
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}
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boolean executePop = popBackStackState(mTmpRecords, mTmpIsPop, name, id, flags);
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if (executePop) {
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mExecutingActions = true;
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try {
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removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop);
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} finally {
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cleanupExec();
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}
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}
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updateOnBackPressedCallbackEnabled();
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doPendingDeferredStart();
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burpActive();
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return executePop;
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}
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@Override
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public int getBackStackEntryCount() {
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return mBackStack != null ? mBackStack.size() : 0;
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}
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@Override
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public BackStackEntry getBackStackEntryAt(int index) {
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return mBackStack.get(index);
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}
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@Override
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public void addOnBackStackChangedListener(OnBackStackChangedListener listener) {
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if (mBackStackChangeListeners == null) {
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mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>();
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}
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mBackStackChangeListeners.add(listener);
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}
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@Override
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public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) {
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if (mBackStackChangeListeners != null) {
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mBackStackChangeListeners.remove(listener);
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}
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}
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@Override
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public void putFragment(Bundle bundle, String key, Fragment fragment) {
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if (fragment.mFragmentManager != this) {
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throwException(new IllegalStateException("Fragment " + fragment
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+ " is not currently in the FragmentManager"));
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}
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bundle.putString(key, fragment.mWho);
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}
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@Override
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@Nullable
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public Fragment getFragment(Bundle bundle, String key) {
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String who = bundle.getString(key);
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if (who == null) {
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return null;
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}
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Fragment f = mActive.get(who);
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if (f == null) {
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throwException(new IllegalStateException("Fragment no longer exists for key "
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+ key + ": unique id " + who));
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}
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return f;
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}
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@Override
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@SuppressWarnings("unchecked")
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public List<Fragment> getFragments() {
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if (mAdded.isEmpty()) {
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return Collections.emptyList();
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}
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synchronized (mAdded) {
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return (List<Fragment>) mAdded.clone();
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}
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}
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@NonNull
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ViewModelStore getViewModelStore(@NonNull Fragment f) {
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return mNonConfig.getViewModelStore(f);
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}
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@NonNull
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FragmentManagerViewModel getChildNonConfig(@NonNull Fragment f) {
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return mNonConfig.getChildNonConfig(f);
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}
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void addRetainedFragment(@NonNull Fragment f) {
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if (isStateSaved()) {
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if (FragmentManagerImpl.DEBUG) {
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Log.v(TAG, "Ignoring addRetainedFragment as the state is already saved");
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}
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return;
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}
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boolean added = mNonConfig.addRetainedFragment(f);
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if (added && FragmentManagerImpl.DEBUG) {
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Log.v(TAG, "Updating retained Fragments: Added " + f);
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}
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}
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void removeRetainedFragment(@NonNull Fragment f) {
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if (isStateSaved()) {
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if (FragmentManagerImpl.DEBUG) {
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Log.v(TAG, "Ignoring removeRetainedFragment as the state is already saved");
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}
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return;
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}
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boolean removed = mNonConfig.removeRetainedFragment(f);
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if (removed && FragmentManagerImpl.DEBUG) {
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Log.v(TAG, "Updating retained Fragments: Removed " + f);
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}
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}
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/**
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* This is used by FragmentController to get the Active fragments.
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*
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* @return A list of active fragments in the fragment manager, including those that are in the
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* back stack.
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*/
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@NonNull
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List<Fragment> getActiveFragments() {
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return new ArrayList<>(mActive.values());
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}
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/**
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* Used by FragmentController to get the number of Active Fragments.
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*
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* @return The number of active fragments.
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*/
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int getActiveFragmentCount() {
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return mActive.size();
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}
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@Override
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@Nullable
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public Fragment.SavedState saveFragmentInstanceState(@NonNull Fragment fragment) {
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if (fragment.mFragmentManager != this) {
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throwException( new IllegalStateException("Fragment " + fragment
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+ " is not currently in the FragmentManager"));
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}
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if (fragment.mState > Fragment.INITIALIZING) {
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Bundle result = saveFragmentBasicState(fragment);
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return result != null ? new Fragment.SavedState(result) : null;
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}
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return null;
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}
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@Override
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public boolean isDestroyed() {
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return mDestroyed;
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}
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder(128);
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sb.append("FragmentManager{");
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sb.append(Integer.toHexString(System.identityHashCode(this)));
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sb.append(" in ");
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if (mParent != null) {
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DebugUtils.buildShortClassTag(mParent, sb);
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} else {
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DebugUtils.buildShortClassTag(mHost, sb);
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}
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sb.append("}}");
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return sb.toString();
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}
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@Override
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public void dump(@NonNull String prefix, @Nullable FileDescriptor fd,
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@NonNull PrintWriter writer, @Nullable String[] args) {
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String innerPrefix = prefix + " ";
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if (!mActive.isEmpty()) {
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writer.print(prefix); writer.print("Active Fragments in ");
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writer.print(Integer.toHexString(System.identityHashCode(this)));
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writer.println(":");
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for (Fragment f : mActive.values()) {
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writer.print(prefix); writer.println(f);
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if (f != null) {
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f.dump(innerPrefix, fd, writer, args);
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}
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}
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}
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int N = mAdded.size();
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if (N > 0) {
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writer.print(prefix); writer.println("Added Fragments:");
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for (int i = 0; i < N; i++) {
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Fragment f = mAdded.get(i);
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writer.print(prefix);
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writer.print(" #");
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writer.print(i);
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writer.print(": ");
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writer.println(f.toString());
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}
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}
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if (mCreatedMenus != null) {
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N = mCreatedMenus.size();
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if (N > 0) {
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writer.print(prefix); writer.println("Fragments Created Menus:");
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for (int i=0; i<N; i++) {
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Fragment f = mCreatedMenus.get(i);
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writer.print(prefix); writer.print(" #"); writer.print(i);
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writer.print(": "); writer.println(f.toString());
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}
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}
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}
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if (mBackStack != null) {
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N = mBackStack.size();
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if (N > 0) {
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writer.print(prefix); writer.println("Back Stack:");
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for (int i=0; i<N; i++) {
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BackStackRecord bs = mBackStack.get(i);
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writer.print(prefix); writer.print(" #"); writer.print(i);
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writer.print(": "); writer.println(bs.toString());
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bs.dump(innerPrefix, writer);
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}
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}
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}
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synchronized (this) {
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if (mBackStackIndices != null) {
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N = mBackStackIndices.size();
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if (N > 0) {
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writer.print(prefix); writer.println("Back Stack Indices:");
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for (int i=0; i<N; i++) {
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BackStackRecord bs = mBackStackIndices.get(i);
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writer.print(prefix); writer.print(" #"); writer.print(i);
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writer.print(": "); writer.println(bs);
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}
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}
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}
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if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) {
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writer.print(prefix); writer.print("mAvailBackStackIndices: ");
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|
writer.println(Arrays.toString(mAvailBackStackIndices.toArray()));
|
|
}
|
|
}
|
|
|
|
if (mPendingActions != null) {
|
|
N = mPendingActions.size();
|
|
if (N > 0) {
|
|
writer.print(prefix); writer.println("Pending Actions:");
|
|
for (int i=0; i<N; i++) {
|
|
OpGenerator r = mPendingActions.get(i);
|
|
writer.print(prefix); writer.print(" #"); writer.print(i);
|
|
writer.print(": "); writer.println(r);
|
|
}
|
|
}
|
|
}
|
|
|
|
writer.print(prefix); writer.println("FragmentManager misc state:");
|
|
writer.print(prefix); writer.print(" mHost="); writer.println(mHost);
|
|
writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer);
|
|
if (mParent != null) {
|
|
writer.print(prefix); writer.print(" mParent="); writer.println(mParent);
|
|
}
|
|
writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState);
|
|
writer.print(" mStateSaved="); writer.print(mStateSaved);
|
|
writer.print(" mStopped="); writer.print(mStopped);
|
|
writer.print(" mDestroyed="); writer.println(mDestroyed);
|
|
if (mNeedMenuInvalidate) {
|
|
writer.print(prefix); writer.print(" mNeedMenuInvalidate=");
|
|
writer.println(mNeedMenuInvalidate);
|
|
}
|
|
}
|
|
|
|
static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f);
|
|
static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f);
|
|
|
|
static final int ANIM_DUR = 220;
|
|
|
|
static AnimationOrAnimator makeOpenCloseAnimation(float startScale,
|
|
float endScale, float startAlpha, float endAlpha) {
|
|
AnimationSet set = new AnimationSet(false);
|
|
ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale,
|
|
Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f);
|
|
scale.setInterpolator(DECELERATE_QUINT);
|
|
scale.setDuration(ANIM_DUR);
|
|
set.addAnimation(scale);
|
|
AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha);
|
|
alpha.setInterpolator(DECELERATE_CUBIC);
|
|
alpha.setDuration(ANIM_DUR);
|
|
set.addAnimation(alpha);
|
|
return new AnimationOrAnimator(set);
|
|
}
|
|
|
|
static AnimationOrAnimator makeFadeAnimation(float start, float end) {
|
|
AlphaAnimation anim = new AlphaAnimation(start, end);
|
|
anim.setInterpolator(DECELERATE_CUBIC);
|
|
anim.setDuration(ANIM_DUR);
|
|
return new AnimationOrAnimator(anim);
|
|
}
|
|
|
|
AnimationOrAnimator loadAnimation(Fragment fragment, int transit, boolean enter,
|
|
int transitionStyle) {
|
|
int nextAnim = fragment.getNextAnim();
|
|
// Clear the Fragment animation
|
|
fragment.setNextAnim(0);
|
|
// If there is a transition on the container, clear those set on the fragment
|
|
if (fragment.mContainer != null && fragment.mContainer.getLayoutTransition() != null) {
|
|
return null;
|
|
}
|
|
Animation animation = fragment.onCreateAnimation(transit, enter, nextAnim);
|
|
if (animation != null) {
|
|
return new AnimationOrAnimator(animation);
|
|
}
|
|
|
|
Animator animator = fragment.onCreateAnimator(transit, enter, nextAnim);
|
|
if (animator != null) {
|
|
return new AnimationOrAnimator(animator);
|
|
}
|
|
|
|
if (nextAnim != 0) {
|
|
String dir = mHost.getContext().getResources().getResourceTypeName(nextAnim);
|
|
boolean isAnim = "anim".equals(dir);
|
|
boolean successfulLoad = false;
|
|
if (isAnim) {
|
|
// try AnimationUtils first
|
|
try {
|
|
animation = AnimationUtils.loadAnimation(mHost.getContext(), nextAnim);
|
|
if (animation != null) {
|
|
return new AnimationOrAnimator(animation);
|
|
}
|
|
// A null animation may be returned and that is acceptable
|
|
successfulLoad = true; // succeeded in loading animation, but it is null
|
|
} catch (Resources.NotFoundException e) {
|
|
throw e; // Rethrow it -- the resource should be found if it is provided.
|
|
} catch (RuntimeException e) {
|
|
// Other exceptions can occur when loading an Animator from AnimationUtils.
|
|
}
|
|
}
|
|
if (!successfulLoad) {
|
|
// try Animator
|
|
try {
|
|
animator = AnimatorInflater.loadAnimator(mHost.getContext(), nextAnim);
|
|
if (animator != null) {
|
|
return new AnimationOrAnimator(animator);
|
|
}
|
|
} catch (RuntimeException e) {
|
|
if (isAnim) {
|
|
// Rethrow it -- we already tried AnimationUtils and it failed.
|
|
throw e;
|
|
}
|
|
// Otherwise, it is probably an animation resource
|
|
animation = AnimationUtils.loadAnimation(mHost.getContext(), nextAnim);
|
|
if (animation != null) {
|
|
return new AnimationOrAnimator(animation);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (transit == 0) {
|
|
return null;
|
|
}
|
|
|
|
int styleIndex = transitToStyleIndex(transit, enter);
|
|
if (styleIndex < 0) {
|
|
return null;
|
|
}
|
|
|
|
switch (styleIndex) {
|
|
case ANIM_STYLE_OPEN_ENTER:
|
|
return makeOpenCloseAnimation(1.125f, 1.0f, 0, 1);
|
|
case ANIM_STYLE_OPEN_EXIT:
|
|
return makeOpenCloseAnimation(1.0f, .975f, 1, 0);
|
|
case ANIM_STYLE_CLOSE_ENTER:
|
|
return makeOpenCloseAnimation(.975f, 1.0f, 0, 1);
|
|
case ANIM_STYLE_CLOSE_EXIT:
|
|
return makeOpenCloseAnimation(1.0f, 1.075f, 1, 0);
|
|
case ANIM_STYLE_FADE_ENTER:
|
|
return makeFadeAnimation(0, 1);
|
|
case ANIM_STYLE_FADE_EXIT:
|
|
return makeFadeAnimation(1, 0);
|
|
}
|
|
|
|
// TODO: remove or fix transitionStyle -- it apparently never worked.
|
|
if (transitionStyle == 0 && mHost.onHasWindowAnimations()) {
|
|
transitionStyle = mHost.onGetWindowAnimations();
|
|
}
|
|
if (transitionStyle == 0) {
|
|
return null;
|
|
}
|
|
|
|
//TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle,
|
|
// com.android.internal.R.styleable.FragmentAnimation);
|
|
//int anim = attrs.getResourceId(styleIndex, 0);
|
|
//attrs.recycle();
|
|
|
|
//if (anim == 0) {
|
|
// return null;
|
|
//}
|
|
|
|
//return AnimatorInflater.loadAnimator(mActivity, anim);
|
|
return null;
|
|
}
|
|
|
|
public void performPendingDeferredStart(Fragment f) {
|
|
if (f.mDeferStart) {
|
|
if (mExecutingActions) {
|
|
// Wait until we're done executing our pending transactions
|
|
mHavePendingDeferredStart = true;
|
|
return;
|
|
}
|
|
f.mDeferStart = false;
|
|
moveToState(f, mCurState, 0, 0, false);
|
|
}
|
|
}
|
|
|
|
boolean isStateAtLeast(int state) {
|
|
return mCurState >= state;
|
|
}
|
|
|
|
@SuppressWarnings("ReferenceEquality")
|
|
void moveToState(Fragment f, int newState, int transit, int transitionStyle,
|
|
boolean keepActive) {
|
|
// Fragments that are not currently added will sit in the onCreate() state.
|
|
if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) {
|
|
newState = Fragment.CREATED;
|
|
}
|
|
if (f.mRemoving && newState > f.mState) {
|
|
if (f.mState == Fragment.INITIALIZING && f.isInBackStack()) {
|
|
// Allow the fragment to be created so that it can be saved later.
|
|
newState = Fragment.CREATED;
|
|
} else {
|
|
// While removing a fragment, we can't change it to a higher state.
|
|
newState = f.mState;
|
|
}
|
|
}
|
|
// Defer start if requested; don't allow it to move to STARTED or higher
|
|
// if it's not already started.
|
|
if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.ACTIVITY_CREATED) {
|
|
newState = Fragment.ACTIVITY_CREATED;
|
|
}
|
|
// Don't allow the Fragment to go above its max lifecycle state
|
|
// Ensure that Fragments are capped at CREATED instead of ACTIVITY_CREATED.
|
|
if (f.mMaxState == Lifecycle.State.CREATED) {
|
|
newState = Math.min(newState, Fragment.CREATED);
|
|
} else {
|
|
newState = Math.min(newState, f.mMaxState.ordinal());
|
|
}
|
|
if (f.mState <= newState) {
|
|
// For fragments that are created from a layout, when restoring from
|
|
// state we don't want to allow them to be created until they are
|
|
// being reloaded from the layout.
|
|
if (f.mFromLayout && !f.mInLayout) {
|
|
return;
|
|
}
|
|
if (f.getAnimatingAway() != null || f.getAnimator() != null) {
|
|
// The fragment is currently being animated... but! Now we
|
|
// want to move our state back up. Give up on waiting for the
|
|
// animation, move to whatever the final state should be once
|
|
// the animation is done, and then we can proceed from there.
|
|
f.setAnimatingAway(null);
|
|
f.setAnimator(null);
|
|
moveToState(f, f.getStateAfterAnimating(), 0, 0, true);
|
|
}
|
|
switch (f.mState) {
|
|
case Fragment.INITIALIZING:
|
|
if (newState > Fragment.INITIALIZING) {
|
|
if (DEBUG) Log.v(TAG, "moveto CREATED: " + f);
|
|
if (f.mSavedFragmentState != null) {
|
|
f.mSavedFragmentState.setClassLoader(mHost.getContext()
|
|
.getClassLoader());
|
|
f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray(
|
|
FragmentManagerImpl.VIEW_STATE_TAG);
|
|
Fragment target = getFragment(f.mSavedFragmentState,
|
|
FragmentManagerImpl.TARGET_STATE_TAG);
|
|
f.mTargetWho = target != null ? target.mWho : null;
|
|
if (f.mTargetWho != null) {
|
|
f.mTargetRequestCode = f.mSavedFragmentState.getInt(
|
|
FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0);
|
|
}
|
|
if (f.mSavedUserVisibleHint != null) {
|
|
f.mUserVisibleHint = f.mSavedUserVisibleHint;
|
|
f.mSavedUserVisibleHint = null;
|
|
} else {
|
|
f.mUserVisibleHint = f.mSavedFragmentState.getBoolean(
|
|
FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true);
|
|
}
|
|
if (!f.mUserVisibleHint) {
|
|
f.mDeferStart = true;
|
|
if (newState > Fragment.ACTIVITY_CREATED) {
|
|
newState = Fragment.ACTIVITY_CREATED;
|
|
}
|
|
}
|
|
}
|
|
|
|
f.mHost = mHost;
|
|
f.mParentFragment = mParent;
|
|
f.mFragmentManager = mParent != null
|
|
? mParent.mChildFragmentManager : mHost.mFragmentManager;
|
|
|
|
// If we have a target fragment, push it along to at least CREATED
|
|
// so that this one can rely on it as an initialized dependency.
|
|
if (f.mTarget != null) {
|
|
if (mActive.get(f.mTarget.mWho) != f.mTarget) {
|
|
throw new IllegalStateException("Fragment " + f
|
|
+ " declared target fragment " + f.mTarget
|
|
+ " that does not belong to this FragmentManager!");
|
|
}
|
|
if (f.mTarget.mState < Fragment.CREATED) {
|
|
moveToState(f.mTarget, Fragment.CREATED, 0, 0, true);
|
|
}
|
|
f.mTargetWho = f.mTarget.mWho;
|
|
f.mTarget = null;
|
|
}
|
|
if (f.mTargetWho != null) {
|
|
Fragment target = mActive.get(f.mTargetWho);
|
|
if (target == null) {
|
|
throw new IllegalStateException("Fragment " + f
|
|
+ " declared target fragment " + f.mTargetWho
|
|
+ " that does not belong to this FragmentManager!");
|
|
}
|
|
if (target.mState < Fragment.CREATED) {
|
|
moveToState(target, Fragment.CREATED, 0, 0, true);
|
|
}
|
|
}
|
|
|
|
dispatchOnFragmentPreAttached(f, mHost.getContext(), false);
|
|
f.performAttach();
|
|
if (f.mParentFragment == null) {
|
|
mHost.onAttachFragment(f);
|
|
} else {
|
|
f.mParentFragment.onAttachFragment(f);
|
|
}
|
|
dispatchOnFragmentAttached(f, mHost.getContext(), false);
|
|
|
|
if (!f.mIsCreated) {
|
|
dispatchOnFragmentPreCreated(f, f.mSavedFragmentState, false);
|
|
f.performCreate(f.mSavedFragmentState);
|
|
dispatchOnFragmentCreated(f, f.mSavedFragmentState, false);
|
|
} else {
|
|
f.restoreChildFragmentState(f.mSavedFragmentState);
|
|
f.mState = Fragment.CREATED;
|
|
}
|
|
}
|
|
// fall through
|
|
case Fragment.CREATED:
|
|
// We want to unconditionally run this anytime we do a moveToState that
|
|
// moves the Fragment above INITIALIZING, including cases such as when
|
|
// we move from CREATED => CREATED as part of the case fall through above.
|
|
if (newState > Fragment.INITIALIZING) {
|
|
ensureInflatedFragmentView(f);
|
|
}
|
|
|
|
if (newState > Fragment.CREATED) {
|
|
if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f);
|
|
if (!f.mFromLayout) {
|
|
ViewGroup container = null;
|
|
if (f.mContainerId != 0) {
|
|
if (f.mContainerId == View.NO_ID) {
|
|
throwException(new IllegalArgumentException(
|
|
"Cannot create fragment "
|
|
+ f
|
|
+ " for a container view with no id"));
|
|
}
|
|
container = (ViewGroup) mContainer.onFindViewById(f.mContainerId);
|
|
if (container == null && !f.mRestored) {
|
|
String resName;
|
|
try {
|
|
resName = f.getResources().getResourceName(f.mContainerId);
|
|
} catch (Resources.NotFoundException e) {
|
|
resName = "unknown";
|
|
}
|
|
throwException(new IllegalArgumentException(
|
|
"No view found for id 0x"
|
|
+ Integer.toHexString(f.mContainerId) + " ("
|
|
+ resName
|
|
+ ") for fragment " + f));
|
|
}
|
|
}
|
|
f.mContainer = container;
|
|
f.performCreateView(f.performGetLayoutInflater(
|
|
f.mSavedFragmentState), container, f.mSavedFragmentState);
|
|
if (f.mView != null) {
|
|
f.mInnerView = f.mView;
|
|
f.mView.setSaveFromParentEnabled(false);
|
|
if (container != null) {
|
|
container.addView(f.mView);
|
|
}
|
|
if (f.mHidden) {
|
|
f.mView.setVisibility(View.GONE);
|
|
}
|
|
f.onViewCreated(f.mView, f.mSavedFragmentState);
|
|
dispatchOnFragmentViewCreated(f, f.mView, f.mSavedFragmentState,
|
|
false);
|
|
// Only animate the view if it is visible. This is done after
|
|
// dispatchOnFragmentViewCreated in case visibility is changed
|
|
f.mIsNewlyAdded = (f.mView.getVisibility() == View.VISIBLE)
|
|
&& f.mContainer != null;
|
|
} else {
|
|
f.mInnerView = null;
|
|
}
|
|
}
|
|
|
|
f.performActivityCreated(f.mSavedFragmentState);
|
|
dispatchOnFragmentActivityCreated(f, f.mSavedFragmentState, false);
|
|
if (f.mView != null) {
|
|
f.restoreViewState(f.mSavedFragmentState);
|
|
}
|
|
f.mSavedFragmentState = null;
|
|
}
|
|
// fall through
|
|
case Fragment.ACTIVITY_CREATED:
|
|
if (newState > Fragment.ACTIVITY_CREATED) {
|
|
if (DEBUG) Log.v(TAG, "moveto STARTED: " + f);
|
|
f.performStart();
|
|
dispatchOnFragmentStarted(f, false);
|
|
}
|
|
// fall through
|
|
case Fragment.STARTED:
|
|
if (newState > Fragment.STARTED) {
|
|
if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f);
|
|
f.performResume();
|
|
dispatchOnFragmentResumed(f, false);
|
|
f.mSavedFragmentState = null;
|
|
f.mSavedViewState = null;
|
|
}
|
|
}
|
|
} else if (f.mState > newState) {
|
|
switch (f.mState) {
|
|
case Fragment.RESUMED:
|
|
if (newState < Fragment.RESUMED) {
|
|
if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f);
|
|
f.performPause();
|
|
dispatchOnFragmentPaused(f, false);
|
|
}
|
|
// fall through
|
|
case Fragment.STARTED:
|
|
if (newState < Fragment.STARTED) {
|
|
if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f);
|
|
f.performStop();
|
|
dispatchOnFragmentStopped(f, false);
|
|
}
|
|
// fall through
|
|
case Fragment.ACTIVITY_CREATED:
|
|
if (newState < Fragment.ACTIVITY_CREATED) {
|
|
if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f);
|
|
if (f.mView != null) {
|
|
// Need to save the current view state if not
|
|
// done already.
|
|
if (mHost.onShouldSaveFragmentState(f) && f.mSavedViewState == null) {
|
|
saveFragmentViewState(f);
|
|
}
|
|
}
|
|
f.performDestroyView();
|
|
dispatchOnFragmentViewDestroyed(f, false);
|
|
if (f.mView != null && f.mContainer != null) {
|
|
// Stop any current animations:
|
|
f.mContainer.endViewTransition(f.mView);
|
|
f.mView.clearAnimation();
|
|
AnimationOrAnimator anim = null;
|
|
// If parent is being removed, no need to handle child animations.
|
|
if (f.getParentFragment() == null || !f.getParentFragment().mRemoving) {
|
|
if (mCurState > Fragment.INITIALIZING && !mDestroyed
|
|
&& f.mView.getVisibility() == View.VISIBLE
|
|
&& f.mPostponedAlpha >= 0) {
|
|
anim = loadAnimation(f, transit, false,
|
|
transitionStyle);
|
|
}
|
|
f.mPostponedAlpha = 0;
|
|
if (anim != null) {
|
|
animateRemoveFragment(f, anim, newState);
|
|
}
|
|
f.mContainer.removeView(f.mView);
|
|
}
|
|
}
|
|
f.mContainer = null;
|
|
f.mView = null;
|
|
// Set here to ensure that Observers are called after
|
|
// the Fragment's view is set to null
|
|
f.mViewLifecycleOwner = null;
|
|
f.mViewLifecycleOwnerLiveData.setValue(null);
|
|
f.mInnerView = null;
|
|
f.mInLayout = false;
|
|
}
|
|
// fall through
|
|
case Fragment.CREATED:
|
|
if (newState < Fragment.CREATED) {
|
|
if (mDestroyed) {
|
|
// The fragment's containing activity is
|
|
// being destroyed, but this fragment is
|
|
// currently animating away. Stop the
|
|
// animation right now -- it is not needed,
|
|
// and we can't wait any more on destroying
|
|
// the fragment.
|
|
if (f.getAnimatingAway() != null) {
|
|
View v = f.getAnimatingAway();
|
|
f.setAnimatingAway(null);
|
|
v.clearAnimation();
|
|
} else if (f.getAnimator() != null) {
|
|
Animator animator = f.getAnimator();
|
|
f.setAnimator(null);
|
|
animator.cancel();
|
|
}
|
|
}
|
|
if (f.getAnimatingAway() != null || f.getAnimator() != null) {
|
|
// We are waiting for the fragment's view to finish
|
|
// animating away. Just make a note of the state
|
|
// the fragment now should move to once the animation
|
|
// is done.
|
|
f.setStateAfterAnimating(newState);
|
|
newState = Fragment.CREATED;
|
|
} else {
|
|
if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f);
|
|
boolean beingRemoved = f.mRemoving && !f.isInBackStack();
|
|
if (beingRemoved || mNonConfig.shouldDestroy(f)) {
|
|
boolean shouldClear;
|
|
if (mHost instanceof ViewModelStoreOwner) {
|
|
shouldClear = mNonConfig.isCleared();
|
|
} else if (mHost.getContext() instanceof Activity) {
|
|
Activity activity = (Activity) mHost.getContext();
|
|
shouldClear = !activity.isChangingConfigurations();
|
|
} else {
|
|
shouldClear = true;
|
|
}
|
|
if (beingRemoved || shouldClear) {
|
|
mNonConfig.clearNonConfigState(f);
|
|
}
|
|
f.performDestroy();
|
|
dispatchOnFragmentDestroyed(f, false);
|
|
} else {
|
|
f.mState = Fragment.INITIALIZING;
|
|
}
|
|
|
|
f.performDetach();
|
|
dispatchOnFragmentDetached(f, false);
|
|
if (!keepActive) {
|
|
if (beingRemoved || mNonConfig.shouldDestroy(f)) {
|
|
makeInactive(f);
|
|
} else {
|
|
f.mHost = null;
|
|
f.mParentFragment = null;
|
|
f.mFragmentManager = null;
|
|
if (f.mTargetWho != null) {
|
|
Fragment target = mActive.get(f.mTargetWho);
|
|
if (target != null && target.getRetainInstance()) {
|
|
// Only keep references to other retained Fragments
|
|
// to avoid developers accessing Fragments that
|
|
// are never coming back
|
|
f.mTarget = target;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (f.mState != newState) {
|
|
Log.w(TAG, "moveToState: Fragment state for " + f + " not updated inline; "
|
|
+ "expected state " + newState + " found " + f.mState);
|
|
f.mState = newState;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Animates the removal of a fragment with the given animator or animation. After animating,
|
|
* the fragment's view will be removed from the hierarchy.
|
|
*
|
|
* @param fragment The fragment to animate out
|
|
* @param anim The animator or animation to run on the fragment's view
|
|
* @param newState The final state after animating.
|
|
*/
|
|
private void animateRemoveFragment(@NonNull final Fragment fragment,
|
|
@NonNull AnimationOrAnimator anim, final int newState) {
|
|
final View viewToAnimate = fragment.mView;
|
|
final ViewGroup container = fragment.mContainer;
|
|
container.startViewTransition(viewToAnimate);
|
|
fragment.setStateAfterAnimating(newState);
|
|
if (anim.animation != null) {
|
|
Animation animation =
|
|
new EndViewTransitionAnimation(anim.animation, container, viewToAnimate);
|
|
fragment.setAnimatingAway(fragment.mView);
|
|
animation.setAnimationListener(new Animation.AnimationListener() {
|
|
@Override
|
|
public void onAnimationStart(Animation animation) {
|
|
}
|
|
|
|
@Override
|
|
public void onAnimationEnd(Animation animation) {
|
|
// onAnimationEnd() comes during draw(), so there can still be some
|
|
// draw events happening after this call. We don't want to detach
|
|
// the view until after the onAnimationEnd()
|
|
container.post(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
if (fragment.getAnimatingAway() != null) {
|
|
fragment.setAnimatingAway(null);
|
|
moveToState(fragment, fragment.getStateAfterAnimating(), 0, 0,
|
|
false);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public void onAnimationRepeat(Animation animation) {
|
|
}
|
|
});
|
|
fragment.mView.startAnimation(animation);
|
|
} else {
|
|
Animator animator = anim.animator;
|
|
fragment.setAnimator(anim.animator);
|
|
animator.addListener(new AnimatorListenerAdapter() {
|
|
@Override
|
|
public void onAnimationEnd(Animator anim) {
|
|
container.endViewTransition(viewToAnimate);
|
|
// If an animator ends immediately, we can just pretend there is no animation.
|
|
// When that happens the the fragment's view won't have been removed yet.
|
|
Animator animator = fragment.getAnimator();
|
|
fragment.setAnimator(null);
|
|
if (animator != null && container.indexOfChild(viewToAnimate) < 0) {
|
|
moveToState(fragment, fragment.getStateAfterAnimating(), 0, 0, false);
|
|
}
|
|
}
|
|
});
|
|
animator.setTarget(fragment.mView);
|
|
animator.start();
|
|
}
|
|
}
|
|
|
|
void moveToState(Fragment f) {
|
|
moveToState(f, mCurState, 0, 0, false);
|
|
}
|
|
|
|
void ensureInflatedFragmentView(Fragment f) {
|
|
if (f.mFromLayout && !f.mPerformedCreateView) {
|
|
f.performCreateView(f.performGetLayoutInflater(
|
|
f.mSavedFragmentState), null, f.mSavedFragmentState);
|
|
if (f.mView != null) {
|
|
f.mInnerView = f.mView;
|
|
f.mView.setSaveFromParentEnabled(false);
|
|
if (f.mHidden) f.mView.setVisibility(View.GONE);
|
|
f.onViewCreated(f.mView, f.mSavedFragmentState);
|
|
dispatchOnFragmentViewCreated(f, f.mView, f.mSavedFragmentState, false);
|
|
} else {
|
|
f.mInnerView = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Fragments that have been shown or hidden don't have their visibility changed or
|
|
* animations run during the {@link #showFragment(Fragment)} or {@link #hideFragment(Fragment)}
|
|
* calls. After fragments are brought to their final state in
|
|
* {@link #moveFragmentToExpectedState(Fragment)} the fragments that have been shown or
|
|
* hidden must have their visibility changed and their animations started here.
|
|
*
|
|
* @param fragment The fragment with mHiddenChanged = true that should change its View's
|
|
* visibility and start the show or hide animation.
|
|
*/
|
|
void completeShowHideFragment(final Fragment fragment) {
|
|
if (fragment.mView != null) {
|
|
AnimationOrAnimator anim = loadAnimation(fragment, fragment.getNextTransition(),
|
|
!fragment.mHidden, fragment.getNextTransitionStyle());
|
|
if (anim != null && anim.animator != null) {
|
|
anim.animator.setTarget(fragment.mView);
|
|
if (fragment.mHidden) {
|
|
if (fragment.isHideReplaced()) {
|
|
fragment.setHideReplaced(false);
|
|
} else {
|
|
final ViewGroup container = fragment.mContainer;
|
|
final View animatingView = fragment.mView;
|
|
container.startViewTransition(animatingView);
|
|
// Delay the actual hide operation until the animation finishes,
|
|
// otherwise the fragment will just immediately disappear
|
|
anim.animator.addListener(new AnimatorListenerAdapter() {
|
|
@Override
|
|
public void onAnimationEnd(Animator animation) {
|
|
container.endViewTransition(animatingView);
|
|
animation.removeListener(this);
|
|
if (fragment.mView != null && fragment.mHidden) {
|
|
fragment.mView.setVisibility(View.GONE);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
} else {
|
|
fragment.mView.setVisibility(View.VISIBLE);
|
|
}
|
|
anim.animator.start();
|
|
} else {
|
|
if (anim != null) {
|
|
fragment.mView.startAnimation(anim.animation);
|
|
anim.animation.start();
|
|
}
|
|
final int visibility = fragment.mHidden && !fragment.isHideReplaced()
|
|
? View.GONE
|
|
: View.VISIBLE;
|
|
fragment.mView.setVisibility(visibility);
|
|
if (fragment.isHideReplaced()) {
|
|
fragment.setHideReplaced(false);
|
|
}
|
|
}
|
|
}
|
|
if (fragment.mAdded && isMenuAvailable(fragment)) {
|
|
mNeedMenuInvalidate = true;
|
|
}
|
|
fragment.mHiddenChanged = false;
|
|
fragment.onHiddenChanged(fragment.mHidden);
|
|
}
|
|
|
|
/**
|
|
* Moves a fragment to its expected final state or the fragment manager's state, depending
|
|
* on whether the fragment manager's state is raised properly.
|
|
*
|
|
* @param f The fragment to change.
|
|
*/
|
|
void moveFragmentToExpectedState(Fragment f) {
|
|
if (f == null) {
|
|
return;
|
|
}
|
|
if (!mActive.containsKey(f.mWho)) {
|
|
if (DEBUG) {
|
|
Log.v(TAG, "Ignoring moving " + f + " to state " + mCurState
|
|
+ "since it is not added to " + this);
|
|
}
|
|
return;
|
|
}
|
|
int nextState = mCurState;
|
|
if (f.mRemoving) {
|
|
if (f.isInBackStack()) {
|
|
nextState = Math.min(nextState, Fragment.CREATED);
|
|
} else {
|
|
nextState = Math.min(nextState, Fragment.INITIALIZING);
|
|
}
|
|
}
|
|
moveToState(f, nextState, f.getNextTransition(), f.getNextTransitionStyle(), false);
|
|
|
|
if (f.mView != null) {
|
|
// Move the view if it is out of order
|
|
Fragment underFragment = findFragmentUnder(f);
|
|
if (underFragment != null) {
|
|
final View underView = underFragment.mView;
|
|
// make sure this fragment is in the right order.
|
|
final ViewGroup container = f.mContainer;
|
|
int underIndex = container.indexOfChild(underView);
|
|
int viewIndex = container.indexOfChild(f.mView);
|
|
if (viewIndex < underIndex) {
|
|
container.removeViewAt(viewIndex);
|
|
container.addView(f.mView, underIndex);
|
|
}
|
|
}
|
|
if (f.mIsNewlyAdded && f.mContainer != null) {
|
|
// Make it visible and run the animations
|
|
if (f.mPostponedAlpha > 0f) {
|
|
f.mView.setAlpha(f.mPostponedAlpha);
|
|
}
|
|
f.mPostponedAlpha = 0f;
|
|
f.mIsNewlyAdded = false;
|
|
// run animations:
|
|
AnimationOrAnimator anim = loadAnimation(f, f.getNextTransition(), true,
|
|
f.getNextTransitionStyle());
|
|
if (anim != null) {
|
|
if (anim.animation != null) {
|
|
f.mView.startAnimation(anim.animation);
|
|
} else {
|
|
anim.animator.setTarget(f.mView);
|
|
anim.animator.start();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (f.mHiddenChanged) {
|
|
completeShowHideFragment(f);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Changes the state of the fragment manager to {@code newState}. If the fragment manager
|
|
* changes state or {@code always} is {@code true}, any fragments within it have their
|
|
* states updated as well.
|
|
*
|
|
* @param newState The new state for the fragment manager
|
|
* @param always If {@code true}, all fragments update their state, even
|
|
* if {@code newState} matches the current fragment manager's state.
|
|
*/
|
|
void moveToState(int newState, boolean always) {
|
|
if (mHost == null && newState != Fragment.INITIALIZING) {
|
|
throw new IllegalStateException("No activity");
|
|
}
|
|
|
|
if (!always && newState == mCurState) {
|
|
return;
|
|
}
|
|
|
|
mCurState = newState;
|
|
|
|
// Must add them in the proper order. mActive fragments may be out of order
|
|
final int numAdded = mAdded.size();
|
|
for (int i = 0; i < numAdded; i++) {
|
|
Fragment f = mAdded.get(i);
|
|
moveFragmentToExpectedState(f);
|
|
}
|
|
|
|
// Now iterate through all active fragments. These will include those that are removed
|
|
// and detached.
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null && (f.mRemoving || f.mDetached) && !f.mIsNewlyAdded) {
|
|
moveFragmentToExpectedState(f);
|
|
}
|
|
}
|
|
|
|
startPendingDeferredFragments();
|
|
|
|
if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) {
|
|
mHost.onSupportInvalidateOptionsMenu();
|
|
mNeedMenuInvalidate = false;
|
|
}
|
|
}
|
|
|
|
void startPendingDeferredFragments() {
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null) {
|
|
performPendingDeferredStart(f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void makeActive(Fragment f) {
|
|
if (mActive.get(f.mWho) != null) {
|
|
return;
|
|
}
|
|
|
|
mActive.put(f.mWho, f);
|
|
if (f.mRetainInstanceChangedWhileDetached) {
|
|
if (f.mRetainInstance) {
|
|
addRetainedFragment(f);
|
|
} else {
|
|
removeRetainedFragment(f);
|
|
}
|
|
f.mRetainInstanceChangedWhileDetached = false;
|
|
}
|
|
if (DEBUG) Log.v(TAG, "Added fragment to active set " + f);
|
|
}
|
|
|
|
void makeInactive(Fragment f) {
|
|
if (mActive.get(f.mWho) == null) {
|
|
return;
|
|
}
|
|
|
|
if (DEBUG) Log.v(TAG, "Removed fragment from active set " + f);
|
|
// Ensure that any Fragment that had this Fragment as its
|
|
// target Fragment retains a reference to the Fragment
|
|
for (Fragment fragment : mActive.values()) {
|
|
if (fragment != null && f.mWho.equals(fragment.mTargetWho)) {
|
|
fragment.mTarget = f;
|
|
fragment.mTargetWho = null;
|
|
}
|
|
}
|
|
// Don't remove yet. That happens in burpActive(). This prevents
|
|
// concurrent modification while iterating over mActive
|
|
mActive.put(f.mWho, null);
|
|
removeRetainedFragment(f);
|
|
|
|
if (f.mTargetWho != null) {
|
|
// Restore the target Fragment so that it can be accessed
|
|
// even after the Fragment is removed.
|
|
f.mTarget = mActive.get(f.mTargetWho);
|
|
}
|
|
f.initState();
|
|
}
|
|
|
|
public void addFragment(Fragment fragment, boolean moveToStateNow) {
|
|
if (DEBUG) Log.v(TAG, "add: " + fragment);
|
|
makeActive(fragment);
|
|
if (!fragment.mDetached) {
|
|
if (mAdded.contains(fragment)) {
|
|
throw new IllegalStateException("Fragment already added: " + fragment);
|
|
}
|
|
synchronized (mAdded) {
|
|
mAdded.add(fragment);
|
|
}
|
|
fragment.mAdded = true;
|
|
fragment.mRemoving = false;
|
|
if (fragment.mView == null) {
|
|
fragment.mHiddenChanged = false;
|
|
}
|
|
if (isMenuAvailable(fragment)) {
|
|
mNeedMenuInvalidate = true;
|
|
}
|
|
if (moveToStateNow) {
|
|
moveToState(fragment);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void removeFragment(Fragment fragment) {
|
|
if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting);
|
|
final boolean inactive = !fragment.isInBackStack();
|
|
if (!fragment.mDetached || inactive) {
|
|
synchronized (mAdded) {
|
|
mAdded.remove(fragment);
|
|
}
|
|
if (isMenuAvailable(fragment)) {
|
|
mNeedMenuInvalidate = true;
|
|
}
|
|
fragment.mAdded = false;
|
|
fragment.mRemoving = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Marks a fragment as hidden to be later animated in with
|
|
* {@link #completeShowHideFragment(Fragment)}.
|
|
*
|
|
* @param fragment The fragment to be shown.
|
|
*/
|
|
public void hideFragment(Fragment fragment) {
|
|
if (DEBUG) Log.v(TAG, "hide: " + fragment);
|
|
if (!fragment.mHidden) {
|
|
fragment.mHidden = true;
|
|
// Toggle hidden changed so that if a fragment goes through show/hide/show
|
|
// it doesn't go through the animation.
|
|
fragment.mHiddenChanged = !fragment.mHiddenChanged;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Marks a fragment as shown to be later animated in with
|
|
* {@link #completeShowHideFragment(Fragment)}.
|
|
*
|
|
* @param fragment The fragment to be shown.
|
|
*/
|
|
public void showFragment(Fragment fragment) {
|
|
if (DEBUG) Log.v(TAG, "show: " + fragment);
|
|
if (fragment.mHidden) {
|
|
fragment.mHidden = false;
|
|
// Toggle hidden changed so that if a fragment goes through show/hide/show
|
|
// it doesn't go through the animation.
|
|
fragment.mHiddenChanged = !fragment.mHiddenChanged;
|
|
}
|
|
}
|
|
|
|
public void detachFragment(Fragment fragment) {
|
|
if (DEBUG) Log.v(TAG, "detach: " + fragment);
|
|
if (!fragment.mDetached) {
|
|
fragment.mDetached = true;
|
|
if (fragment.mAdded) {
|
|
// We are not already in back stack, so need to remove the fragment.
|
|
if (DEBUG) Log.v(TAG, "remove from detach: " + fragment);
|
|
synchronized (mAdded) {
|
|
mAdded.remove(fragment);
|
|
}
|
|
if (isMenuAvailable(fragment)) {
|
|
mNeedMenuInvalidate = true;
|
|
}
|
|
fragment.mAdded = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
public void attachFragment(Fragment fragment) {
|
|
if (DEBUG) Log.v(TAG, "attach: " + fragment);
|
|
if (fragment.mDetached) {
|
|
fragment.mDetached = false;
|
|
if (!fragment.mAdded) {
|
|
if (mAdded.contains(fragment)) {
|
|
throw new IllegalStateException("Fragment already added: " + fragment);
|
|
}
|
|
if (DEBUG) Log.v(TAG, "add from attach: " + fragment);
|
|
synchronized (mAdded) {
|
|
mAdded.add(fragment);
|
|
}
|
|
fragment.mAdded = true;
|
|
if (isMenuAvailable(fragment)) {
|
|
mNeedMenuInvalidate = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
@Nullable
|
|
public Fragment findFragmentById(int id) {
|
|
// First look through added fragments.
|
|
for (int i = mAdded.size() - 1; i >= 0; i--) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null && f.mFragmentId == id) {
|
|
return f;
|
|
}
|
|
}
|
|
// Now for any known fragment.
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null && f.mFragmentId == id) {
|
|
return f;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
@Nullable
|
|
public Fragment findFragmentByTag(@Nullable String tag) {
|
|
if (tag != null) {
|
|
// First look through added fragments.
|
|
for (int i=mAdded.size()-1; i>=0; i--) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null && tag.equals(f.mTag)) {
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
if (tag != null) {
|
|
// Now for any known fragment.
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null && tag.equals(f.mTag)) {
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public Fragment findFragmentByWho(@NonNull String who) {
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null && (f = f.findFragmentByWho(who)) != null) {
|
|
return f;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private void checkStateLoss() {
|
|
if (isStateSaved()) {
|
|
// MOD: Fix fragment state loss exception
|
|
//throw new IllegalStateException(
|
|
// "Can not perform this action after onSaveInstanceState");
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean isStateSaved() {
|
|
// See saveAllState() for the explanation of this. We do this for
|
|
// all platform versions, to keep our behavior more consistent between
|
|
// them.
|
|
return mStateSaved || mStopped;
|
|
}
|
|
|
|
/**
|
|
* Adds an action to the queue of pending actions.
|
|
*
|
|
* @param action the action to add
|
|
* @param allowStateLoss whether to allow loss of state information
|
|
* @throws IllegalStateException if the activity has been destroyed
|
|
*/
|
|
public void enqueueAction(OpGenerator action, boolean allowStateLoss) {
|
|
if (!allowStateLoss) {
|
|
checkStateLoss();
|
|
}
|
|
synchronized (this) {
|
|
if (mDestroyed || mHost == null) {
|
|
if (allowStateLoss) {
|
|
// This FragmentManager isn't attached, so drop the entire transaction.
|
|
return;
|
|
}
|
|
throw new IllegalStateException("Activity has been destroyed");
|
|
}
|
|
if (mPendingActions == null) {
|
|
mPendingActions = new ArrayList<>();
|
|
}
|
|
mPendingActions.add(action);
|
|
scheduleCommit();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Schedules the execution when one hasn't been scheduled already. This should happen
|
|
* the first time {@link #enqueueAction(OpGenerator, boolean)} is called or when
|
|
* a postponed transaction has been started with
|
|
* {@link Fragment#startPostponedEnterTransition()}
|
|
*/
|
|
@SuppressWarnings("WeakerAccess") /* synthetic access */
|
|
void scheduleCommit() {
|
|
synchronized (this) {
|
|
boolean postponeReady =
|
|
mPostponedTransactions != null && !mPostponedTransactions.isEmpty();
|
|
boolean pendingReady = mPendingActions != null && mPendingActions.size() == 1;
|
|
if (postponeReady || pendingReady) {
|
|
mHost.getHandler().removeCallbacks(mExecCommit);
|
|
mHost.getHandler().post(mExecCommit);
|
|
updateOnBackPressedCallbackEnabled();
|
|
}
|
|
}
|
|
}
|
|
|
|
public int allocBackStackIndex(BackStackRecord bse) {
|
|
synchronized (this) {
|
|
if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) {
|
|
if (mBackStackIndices == null) {
|
|
mBackStackIndices = new ArrayList<BackStackRecord>();
|
|
}
|
|
int index = mBackStackIndices.size();
|
|
if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse);
|
|
mBackStackIndices.add(bse);
|
|
return index;
|
|
|
|
} else {
|
|
int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1);
|
|
if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse);
|
|
mBackStackIndices.set(index, bse);
|
|
return index;
|
|
}
|
|
}
|
|
}
|
|
|
|
public void setBackStackIndex(int index, BackStackRecord bse) {
|
|
synchronized (this) {
|
|
if (mBackStackIndices == null) {
|
|
mBackStackIndices = new ArrayList<BackStackRecord>();
|
|
}
|
|
int N = mBackStackIndices.size();
|
|
if (index < N) {
|
|
if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse);
|
|
mBackStackIndices.set(index, bse);
|
|
} else {
|
|
while (N < index) {
|
|
mBackStackIndices.add(null);
|
|
if (mAvailBackStackIndices == null) {
|
|
mAvailBackStackIndices = new ArrayList<Integer>();
|
|
}
|
|
if (DEBUG) Log.v(TAG, "Adding available back stack index " + N);
|
|
mAvailBackStackIndices.add(N);
|
|
N++;
|
|
}
|
|
if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse);
|
|
mBackStackIndices.add(bse);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void freeBackStackIndex(int index) {
|
|
synchronized (this) {
|
|
mBackStackIndices.set(index, null);
|
|
if (mAvailBackStackIndices == null) {
|
|
mAvailBackStackIndices = new ArrayList<Integer>();
|
|
}
|
|
if (DEBUG) Log.v(TAG, "Freeing back stack index " + index);
|
|
mAvailBackStackIndices.add(index);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Broken out from exec*, this prepares for gathering and executing operations.
|
|
*
|
|
* @param allowStateLoss true if state loss should be ignored or false if it should be
|
|
* checked.
|
|
*/
|
|
private void ensureExecReady(boolean allowStateLoss) {
|
|
if (mExecutingActions) {
|
|
throw new IllegalStateException("FragmentManager is already executing transactions");
|
|
}
|
|
|
|
if (mHost == null) {
|
|
throw new IllegalStateException("Fragment host has been destroyed");
|
|
}
|
|
|
|
if (Looper.myLooper() != mHost.getHandler().getLooper()) {
|
|
throw new IllegalStateException("Must be called from main thread of fragment host");
|
|
}
|
|
|
|
if (!allowStateLoss) {
|
|
checkStateLoss();
|
|
}
|
|
|
|
if (mTmpRecords == null) {
|
|
mTmpRecords = new ArrayList<>();
|
|
mTmpIsPop = new ArrayList<>();
|
|
}
|
|
mExecutingActions = true;
|
|
try {
|
|
executePostponedTransaction(null, null);
|
|
} finally {
|
|
mExecutingActions = false;
|
|
}
|
|
}
|
|
|
|
public void execSingleAction(OpGenerator action, boolean allowStateLoss) {
|
|
if (allowStateLoss && (mHost == null || mDestroyed)) {
|
|
// This FragmentManager isn't attached, so drop the entire transaction.
|
|
return;
|
|
}
|
|
ensureExecReady(allowStateLoss);
|
|
if (action.generateOps(mTmpRecords, mTmpIsPop)) {
|
|
mExecutingActions = true;
|
|
try {
|
|
removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop);
|
|
} finally {
|
|
cleanupExec();
|
|
}
|
|
}
|
|
|
|
updateOnBackPressedCallbackEnabled();
|
|
doPendingDeferredStart();
|
|
burpActive();
|
|
}
|
|
|
|
/**
|
|
* Broken out of exec*, this cleans up the mExecutingActions and the temporary structures
|
|
* used in executing operations.
|
|
*/
|
|
private void cleanupExec() {
|
|
mExecutingActions = false;
|
|
mTmpIsPop.clear();
|
|
mTmpRecords.clear();
|
|
}
|
|
|
|
/**
|
|
* Only call from main thread!
|
|
*/
|
|
public boolean execPendingActions() {
|
|
ensureExecReady(true);
|
|
|
|
boolean didSomething = false;
|
|
while (generateOpsForPendingActions(mTmpRecords, mTmpIsPop)) {
|
|
mExecutingActions = true;
|
|
try {
|
|
removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop);
|
|
} finally {
|
|
cleanupExec();
|
|
}
|
|
didSomething = true;
|
|
}
|
|
|
|
updateOnBackPressedCallbackEnabled();
|
|
doPendingDeferredStart();
|
|
burpActive();
|
|
|
|
return didSomething;
|
|
}
|
|
|
|
/**
|
|
* Complete the execution of transactions that have previously been postponed, but are
|
|
* now ready.
|
|
*/
|
|
private void executePostponedTransaction(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop) {
|
|
int numPostponed = mPostponedTransactions == null ? 0 : mPostponedTransactions.size();
|
|
for (int i = 0; i < numPostponed; i++) {
|
|
StartEnterTransitionListener listener = mPostponedTransactions.get(i);
|
|
if (records != null && !listener.mIsBack) {
|
|
int index = records.indexOf(listener.mRecord);
|
|
if (index != -1 && isRecordPop.get(index)) {
|
|
mPostponedTransactions.remove(i);
|
|
i--;
|
|
numPostponed--;
|
|
listener.cancelTransaction();
|
|
continue;
|
|
}
|
|
}
|
|
if (listener.isReady() || (records != null
|
|
&& listener.mRecord.interactsWith(records, 0, records.size()))) {
|
|
mPostponedTransactions.remove(i);
|
|
i--;
|
|
numPostponed--;
|
|
int index;
|
|
if (records != null && !listener.mIsBack
|
|
&& (index = records.indexOf(listener.mRecord)) != -1
|
|
&& isRecordPop.get(index)) {
|
|
// This is popping a postponed transaction
|
|
listener.cancelTransaction();
|
|
} else {
|
|
listener.completeTransaction();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove redundant BackStackRecord operations and executes them. This method merges operations
|
|
* of proximate records that allow reordering. See
|
|
* {@link FragmentTransaction#setReorderingAllowed(boolean)}.
|
|
* <p>
|
|
* For example, a transaction that adds to the back stack and then another that pops that
|
|
* back stack record will be optimized to remove the unnecessary operation.
|
|
* <p>
|
|
* Likewise, two transactions committed that are executed at the same time will be optimized
|
|
* to remove the redundant operations as well as two pop operations executed together.
|
|
*
|
|
* @param records The records pending execution
|
|
* @param isRecordPop The direction that these records are being run.
|
|
*/
|
|
private void removeRedundantOperationsAndExecute(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop) {
|
|
if (records == null || records.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
if (isRecordPop == null || records.size() != isRecordPop.size()) {
|
|
throw new IllegalStateException("Internal error with the back stack records");
|
|
}
|
|
|
|
// Force start of any postponed transactions that interact with scheduled transactions:
|
|
executePostponedTransaction(records, isRecordPop);
|
|
|
|
final int numRecords = records.size();
|
|
int startIndex = 0;
|
|
for (int recordNum = 0; recordNum < numRecords; recordNum++) {
|
|
final boolean canReorder = records.get(recordNum).mReorderingAllowed;
|
|
if (!canReorder) {
|
|
// execute all previous transactions
|
|
if (startIndex != recordNum) {
|
|
executeOpsTogether(records, isRecordPop, startIndex, recordNum);
|
|
}
|
|
// execute all pop operations that don't allow reordering together or
|
|
// one add operation
|
|
int reorderingEnd = recordNum + 1;
|
|
if (isRecordPop.get(recordNum)) {
|
|
while (reorderingEnd < numRecords
|
|
&& isRecordPop.get(reorderingEnd)
|
|
&& !records.get(reorderingEnd).mReorderingAllowed) {
|
|
reorderingEnd++;
|
|
}
|
|
}
|
|
executeOpsTogether(records, isRecordPop, recordNum, reorderingEnd);
|
|
startIndex = reorderingEnd;
|
|
recordNum = reorderingEnd - 1;
|
|
}
|
|
}
|
|
if (startIndex != numRecords) {
|
|
executeOpsTogether(records, isRecordPop, startIndex, numRecords);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Executes a subset of a list of BackStackRecords, all of which either allow reordering or
|
|
* do not allow ordering.
|
|
* @param records A list of BackStackRecords that are to be executed
|
|
* @param isRecordPop The direction that these records are being run.
|
|
* @param startIndex The index of the first record in <code>records</code> to be executed
|
|
* @param endIndex One more than the final record index in <code>records</code> to executed.
|
|
*/
|
|
private void executeOpsTogether(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop, int startIndex, int endIndex) {
|
|
final boolean allowReordering = records.get(startIndex).mReorderingAllowed;
|
|
boolean addToBackStack = false;
|
|
if (mTmpAddedFragments == null) {
|
|
mTmpAddedFragments = new ArrayList<>();
|
|
} else {
|
|
mTmpAddedFragments.clear();
|
|
}
|
|
mTmpAddedFragments.addAll(mAdded);
|
|
Fragment oldPrimaryNav = getPrimaryNavigationFragment();
|
|
for (int recordNum = startIndex; recordNum < endIndex; recordNum++) {
|
|
final BackStackRecord record = records.get(recordNum);
|
|
final boolean isPop = isRecordPop.get(recordNum);
|
|
if (!isPop) {
|
|
oldPrimaryNav = record.expandOps(mTmpAddedFragments, oldPrimaryNav);
|
|
} else {
|
|
oldPrimaryNav = record.trackAddedFragmentsInPop(mTmpAddedFragments, oldPrimaryNav);
|
|
}
|
|
addToBackStack = addToBackStack || record.mAddToBackStack;
|
|
}
|
|
mTmpAddedFragments.clear();
|
|
|
|
if (!allowReordering) {
|
|
FragmentTransition.startTransitions(this, records, isRecordPop, startIndex, endIndex,
|
|
false);
|
|
}
|
|
executeOps(records, isRecordPop, startIndex, endIndex);
|
|
|
|
int postponeIndex = endIndex;
|
|
if (allowReordering) {
|
|
ArraySet<Fragment> addedFragments = new ArraySet<>();
|
|
addAddedFragments(addedFragments);
|
|
postponeIndex = postponePostponableTransactions(records, isRecordPop,
|
|
startIndex, endIndex, addedFragments);
|
|
makeRemovedFragmentsInvisible(addedFragments);
|
|
}
|
|
|
|
if (postponeIndex != startIndex && allowReordering) {
|
|
// need to run something now
|
|
FragmentTransition.startTransitions(this, records, isRecordPop, startIndex,
|
|
postponeIndex, true);
|
|
moveToState(mCurState, true);
|
|
}
|
|
|
|
for (int recordNum = startIndex; recordNum < endIndex; recordNum++) {
|
|
final BackStackRecord record = records.get(recordNum);
|
|
final boolean isPop = isRecordPop.get(recordNum);
|
|
if (isPop && record.mIndex >= 0) {
|
|
freeBackStackIndex(record.mIndex);
|
|
record.mIndex = -1;
|
|
}
|
|
record.runOnCommitRunnables();
|
|
}
|
|
if (addToBackStack) {
|
|
reportBackStackChanged();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Any fragments that were removed because they have been postponed should have their views
|
|
* made invisible by setting their alpha to 0.
|
|
*
|
|
* @param fragments The fragments that were added during operation execution. Only the ones
|
|
* that are no longer added will have their alpha changed.
|
|
*/
|
|
private void makeRemovedFragmentsInvisible(ArraySet<Fragment> fragments) {
|
|
final int numAdded = fragments.size();
|
|
for (int i = 0; i < numAdded; i++) {
|
|
final Fragment fragment = fragments.valueAt(i);
|
|
if (!fragment.mAdded) {
|
|
final View view = fragment.requireView();
|
|
fragment.mPostponedAlpha = view.getAlpha();
|
|
view.setAlpha(0f);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Examine all transactions and determine which ones are marked as postponed. Those will
|
|
* have their operations rolled back and moved to the end of the record list (up to endIndex).
|
|
* It will also add the postponed transaction to the queue.
|
|
*
|
|
* @param records A list of BackStackRecords that should be checked.
|
|
* @param isRecordPop The direction that these records are being run.
|
|
* @param startIndex The index of the first record in <code>records</code> to be checked
|
|
* @param endIndex One more than the final record index in <code>records</code> to be checked.
|
|
* @return The index of the first postponed transaction or endIndex if no transaction was
|
|
* postponed.
|
|
*/
|
|
private int postponePostponableTransactions(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop, int startIndex, int endIndex,
|
|
ArraySet<Fragment> added) {
|
|
int postponeIndex = endIndex;
|
|
for (int i = endIndex - 1; i >= startIndex; i--) {
|
|
final BackStackRecord record = records.get(i);
|
|
final boolean isPop = isRecordPop.get(i);
|
|
boolean isPostponed = record.isPostponed()
|
|
&& !record.interactsWith(records, i + 1, endIndex);
|
|
if (isPostponed) {
|
|
if (mPostponedTransactions == null) {
|
|
mPostponedTransactions = new ArrayList<>();
|
|
}
|
|
StartEnterTransitionListener listener =
|
|
new StartEnterTransitionListener(record, isPop);
|
|
mPostponedTransactions.add(listener);
|
|
record.setOnStartPostponedListener(listener);
|
|
|
|
// roll back the transaction
|
|
if (isPop) {
|
|
record.executeOps();
|
|
} else {
|
|
record.executePopOps(false);
|
|
}
|
|
|
|
// move to the end
|
|
postponeIndex--;
|
|
if (i != postponeIndex) {
|
|
records.remove(i);
|
|
records.add(postponeIndex, record);
|
|
}
|
|
|
|
// different views may be visible now
|
|
addAddedFragments(added);
|
|
}
|
|
}
|
|
return postponeIndex;
|
|
}
|
|
|
|
/**
|
|
* When a postponed transaction is ready to be started, this completes the transaction,
|
|
* removing, hiding, or showing views as well as starting the animations and transitions.
|
|
* <p>
|
|
* {@code runtransitions} is set to false when the transaction postponement was interrupted
|
|
* abnormally -- normally by a new transaction being started that affects the postponed
|
|
* transaction.
|
|
*
|
|
* @param record The transaction to run
|
|
* @param isPop true if record is popping or false if it is adding
|
|
* @param runTransitions true if the fragment transition should be run or false otherwise.
|
|
* @param moveToState true if the state should be changed after executing the operations.
|
|
* This is false when the transaction is canceled when a postponed
|
|
* transaction is popped.
|
|
*/
|
|
@SuppressWarnings("WeakerAccess") /* synthetic access */
|
|
void completeExecute(BackStackRecord record, boolean isPop, boolean runTransitions,
|
|
boolean moveToState) {
|
|
if (isPop) {
|
|
record.executePopOps(moveToState);
|
|
} else {
|
|
record.executeOps();
|
|
}
|
|
ArrayList<BackStackRecord> records = new ArrayList<>(1);
|
|
ArrayList<Boolean> isRecordPop = new ArrayList<>(1);
|
|
records.add(record);
|
|
isRecordPop.add(isPop);
|
|
if (runTransitions) {
|
|
FragmentTransition.startTransitions(this, records, isRecordPop, 0, 1, true);
|
|
}
|
|
if (moveToState) {
|
|
moveToState(mCurState, true);
|
|
}
|
|
|
|
for (Fragment fragment : mActive.values()) {
|
|
// Allow added fragments to be removed during the pop since we aren't going
|
|
// to move them to the final state with moveToState(mCurState).
|
|
if (fragment != null && fragment.mView != null && fragment.mIsNewlyAdded
|
|
&& record.interactsWith(fragment.mContainerId)) {
|
|
if (fragment.mPostponedAlpha > 0) {
|
|
fragment.mView.setAlpha(fragment.mPostponedAlpha);
|
|
}
|
|
if (moveToState) {
|
|
fragment.mPostponedAlpha = 0;
|
|
} else {
|
|
fragment.mPostponedAlpha = -1;
|
|
fragment.mIsNewlyAdded = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find a fragment within the fragment's container whose View should be below the passed
|
|
* fragment. {@code null} is returned when the fragment has no View or if there should be
|
|
* no fragment with a View below the given fragment.
|
|
*
|
|
* As an example, if mAdded has two Fragments with Views sharing the same container:
|
|
* FragmentA
|
|
* FragmentB
|
|
*
|
|
* Then, when processing FragmentB, FragmentA will be returned. If, however, FragmentA
|
|
* had no View, null would be returned.
|
|
*
|
|
* @param f The fragment that may be on top of another fragment.
|
|
* @return The fragment with a View under f, if one exists or null if f has no View or
|
|
* there are no fragments with Views in the same container.
|
|
*/
|
|
private Fragment findFragmentUnder(Fragment f) {
|
|
final ViewGroup container = f.mContainer;
|
|
final View view = f.mView;
|
|
|
|
if (container == null || view == null) {
|
|
return null;
|
|
}
|
|
|
|
final int fragmentIndex = mAdded.indexOf(f);
|
|
for (int i = fragmentIndex - 1; i >= 0; i--) {
|
|
Fragment underFragment = mAdded.get(i);
|
|
if (underFragment.mContainer == container && underFragment.mView != null) {
|
|
// Found the fragment under this one
|
|
return underFragment;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Run the operations in the BackStackRecords, either to push or pop.
|
|
*
|
|
* @param records The list of records whose operations should be run.
|
|
* @param isRecordPop The direction that these records are being run.
|
|
* @param startIndex The index of the first entry in records to run.
|
|
* @param endIndex One past the index of the final entry in records to run.
|
|
*/
|
|
private static void executeOps(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop, int startIndex, int endIndex) {
|
|
for (int i = startIndex; i < endIndex; i++) {
|
|
final BackStackRecord record = records.get(i);
|
|
final boolean isPop = isRecordPop.get(i);
|
|
if (isPop) {
|
|
record.bumpBackStackNesting(-1);
|
|
// Only execute the add operations at the end of
|
|
// all transactions.
|
|
boolean moveToState = i == (endIndex - 1);
|
|
record.executePopOps(moveToState);
|
|
} else {
|
|
record.bumpBackStackNesting(1);
|
|
record.executeOps();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Ensure that fragments that are added are moved to at least the CREATED state.
|
|
* Any newly-added Views are inserted into {@code added} so that the Transaction can be
|
|
* postponed with {@link Fragment#postponeEnterTransition()}. They will later be made
|
|
* invisible (by setting their alpha to 0) if they have been removed when postponed.
|
|
*/
|
|
private void addAddedFragments(ArraySet<Fragment> added) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return;
|
|
}
|
|
// We want to leave the fragment in the started state
|
|
final int state = Math.min(mCurState, Fragment.STARTED);
|
|
final int numAdded = mAdded.size();
|
|
for (int i = 0; i < numAdded; i++) {
|
|
Fragment fragment = mAdded.get(i);
|
|
if (fragment.mState < state) {
|
|
moveToState(fragment, state, fragment.getNextAnim(), fragment.getNextTransition(),
|
|
false);
|
|
if (fragment.mView != null && !fragment.mHidden && fragment.mIsNewlyAdded) {
|
|
added.add(fragment);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Starts all postponed transactions regardless of whether they are ready or not.
|
|
*/
|
|
private void forcePostponedTransactions() {
|
|
if (mPostponedTransactions != null) {
|
|
while (!mPostponedTransactions.isEmpty()) {
|
|
mPostponedTransactions.remove(0).completeTransaction();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Ends the animations of fragments so that they immediately reach the end state.
|
|
* This is used prior to saving the state so that the correct state is saved.
|
|
*/
|
|
private void endAnimatingAwayFragments() {
|
|
for (Fragment fragment : mActive.values()) {
|
|
if (fragment != null) {
|
|
if (fragment.getAnimatingAway() != null) {
|
|
// Give up waiting for the animation and just end it.
|
|
final int stateAfterAnimating = fragment.getStateAfterAnimating();
|
|
final View animatingAway = fragment.getAnimatingAway();
|
|
Animation animation = animatingAway.getAnimation();
|
|
if (animation != null) {
|
|
animation.cancel();
|
|
// force-clear the animation, as Animation#cancel() doesn't work prior to N,
|
|
// and will instead cause the animation to infinitely loop
|
|
animatingAway.clearAnimation();
|
|
}
|
|
fragment.setAnimatingAway(null);
|
|
moveToState(fragment, stateAfterAnimating, 0, 0, false);
|
|
} else if (fragment.getAnimator() != null) {
|
|
fragment.getAnimator().end();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds all records in the pending actions to records and whether they are add or pop
|
|
* operations to isPop. After executing, the pending actions will be empty.
|
|
*
|
|
* @param records All pending actions will generate BackStackRecords added to this.
|
|
* This contains the transactions, in order, to execute.
|
|
* @param isPop All pending actions will generate booleans to add to this. This contains
|
|
* an entry for each entry in records to indicate whether or not it is a
|
|
* pop action.
|
|
*/
|
|
private boolean generateOpsForPendingActions(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isPop) {
|
|
boolean didSomething = false;
|
|
synchronized (this) {
|
|
if (mPendingActions == null || mPendingActions.size() == 0) {
|
|
return false;
|
|
}
|
|
|
|
final int numActions = mPendingActions.size();
|
|
for (int i = 0; i < numActions; i++) {
|
|
didSomething |= mPendingActions.get(i).generateOps(records, isPop);
|
|
}
|
|
mPendingActions.clear();
|
|
mHost.getHandler().removeCallbacks(mExecCommit);
|
|
}
|
|
return didSomething;
|
|
}
|
|
|
|
void doPendingDeferredStart() {
|
|
if (mHavePendingDeferredStart) {
|
|
mHavePendingDeferredStart = false;
|
|
startPendingDeferredFragments();
|
|
}
|
|
}
|
|
|
|
void reportBackStackChanged() {
|
|
if (mBackStackChangeListeners != null) {
|
|
for (int i=0; i<mBackStackChangeListeners.size(); i++) {
|
|
mBackStackChangeListeners.get(i).onBackStackChanged();
|
|
}
|
|
}
|
|
}
|
|
|
|
void addBackStackState(BackStackRecord state) {
|
|
if (mBackStack == null) {
|
|
mBackStack = new ArrayList<BackStackRecord>();
|
|
}
|
|
mBackStack.add(state);
|
|
}
|
|
|
|
@SuppressWarnings("unused")
|
|
boolean popBackStackState(ArrayList<BackStackRecord> records, ArrayList<Boolean> isRecordPop,
|
|
String name, int id, int flags) {
|
|
if (mBackStack == null) {
|
|
return false;
|
|
}
|
|
if (name == null && id < 0 && (flags & POP_BACK_STACK_INCLUSIVE) == 0) {
|
|
int last = mBackStack.size() - 1;
|
|
if (last < 0) {
|
|
return false;
|
|
}
|
|
records.add(mBackStack.remove(last));
|
|
isRecordPop.add(true);
|
|
} else {
|
|
int index = -1;
|
|
if (name != null || id >= 0) {
|
|
// If a name or ID is specified, look for that place in
|
|
// the stack.
|
|
index = mBackStack.size()-1;
|
|
while (index >= 0) {
|
|
BackStackRecord bss = mBackStack.get(index);
|
|
if (name != null && name.equals(bss.getName())) {
|
|
break;
|
|
}
|
|
if (id >= 0 && id == bss.mIndex) {
|
|
break;
|
|
}
|
|
index--;
|
|
}
|
|
if (index < 0) {
|
|
return false;
|
|
}
|
|
if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) {
|
|
index--;
|
|
// Consume all following entries that match.
|
|
while (index >= 0) {
|
|
BackStackRecord bss = mBackStack.get(index);
|
|
if ((name != null && name.equals(bss.getName()))
|
|
|| (id >= 0 && id == bss.mIndex)) {
|
|
index--;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (index == mBackStack.size()-1) {
|
|
return false;
|
|
}
|
|
for (int i = mBackStack.size() - 1; i > index; i--) {
|
|
records.add(mBackStack.remove(i));
|
|
isRecordPop.add(true);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @deprecated Ideally, all {@link androidx.fragment.app.FragmentHostCallback} instances
|
|
* implement ViewModelStoreOwner and we can remove this method entirely.
|
|
*/
|
|
@Deprecated
|
|
FragmentManagerNonConfig retainNonConfig() {
|
|
if (mHost instanceof ViewModelStoreOwner) {
|
|
throwException(new IllegalStateException("You cannot use retainNonConfig when your "
|
|
+ "FragmentHostCallback implements ViewModelStoreOwner."));
|
|
}
|
|
return mNonConfig.getSnapshot();
|
|
}
|
|
|
|
void saveFragmentViewState(Fragment f) {
|
|
if (f.mInnerView == null) {
|
|
return;
|
|
}
|
|
if (mStateArray == null) {
|
|
mStateArray = new SparseArray<Parcelable>();
|
|
} else {
|
|
mStateArray.clear();
|
|
}
|
|
f.mInnerView.saveHierarchyState(mStateArray);
|
|
if (mStateArray.size() > 0) {
|
|
f.mSavedViewState = mStateArray;
|
|
mStateArray = null;
|
|
}
|
|
}
|
|
|
|
Bundle saveFragmentBasicState(Fragment f) {
|
|
Bundle result = null;
|
|
|
|
if (mStateBundle == null) {
|
|
mStateBundle = new Bundle();
|
|
}
|
|
f.performSaveInstanceState(mStateBundle);
|
|
dispatchOnFragmentSaveInstanceState(f, mStateBundle, false);
|
|
if (!mStateBundle.isEmpty()) {
|
|
result = mStateBundle;
|
|
mStateBundle = null;
|
|
}
|
|
|
|
if (f.mView != null) {
|
|
saveFragmentViewState(f);
|
|
}
|
|
if (f.mSavedViewState != null) {
|
|
if (result == null) {
|
|
result = new Bundle();
|
|
}
|
|
result.putSparseParcelableArray(
|
|
FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState);
|
|
}
|
|
if (!f.mUserVisibleHint) {
|
|
if (result == null) {
|
|
result = new Bundle();
|
|
}
|
|
// Only add this if it's not the default value
|
|
result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
Parcelable saveAllState() {
|
|
// Make sure all pending operations have now been executed to get
|
|
// our state update-to-date.
|
|
forcePostponedTransactions();
|
|
endAnimatingAwayFragments();
|
|
execPendingActions();
|
|
|
|
mStateSaved = true;
|
|
|
|
if (mActive.isEmpty()) {
|
|
return null;
|
|
}
|
|
|
|
// First collect all active fragments.
|
|
int size = mActive.size();
|
|
ArrayList<FragmentState> active = new ArrayList<>(size);
|
|
boolean haveFragments = false;
|
|
for (Fragment f : mActive.values()) {
|
|
if (f != null) {
|
|
if (f.mFragmentManager != this) {
|
|
throwException(new IllegalStateException(
|
|
"Failure saving state: active " + f
|
|
+ " was removed from the FragmentManager"));
|
|
}
|
|
|
|
haveFragments = true;
|
|
|
|
FragmentState fs = new FragmentState(f);
|
|
active.add(fs);
|
|
|
|
if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) {
|
|
fs.mSavedFragmentState = saveFragmentBasicState(f);
|
|
|
|
if (f.mTargetWho != null) {
|
|
Fragment target = mActive.get(f.mTargetWho);
|
|
if (target == null) {
|
|
throwException(new IllegalStateException(
|
|
"Failure saving state: " + f
|
|
+ " has target not in fragment manager: "
|
|
+ f.mTargetWho));
|
|
}
|
|
if (fs.mSavedFragmentState == null) {
|
|
fs.mSavedFragmentState = new Bundle();
|
|
}
|
|
putFragment(fs.mSavedFragmentState,
|
|
FragmentManagerImpl.TARGET_STATE_TAG, target);
|
|
if (f.mTargetRequestCode != 0) {
|
|
fs.mSavedFragmentState.putInt(
|
|
FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG,
|
|
f.mTargetRequestCode);
|
|
}
|
|
}
|
|
|
|
} else {
|
|
fs.mSavedFragmentState = f.mSavedFragmentState;
|
|
}
|
|
|
|
if (DEBUG) Log.v(TAG, "Saved state of " + f + ": "
|
|
+ fs.mSavedFragmentState);
|
|
}
|
|
}
|
|
|
|
if (!haveFragments) {
|
|
if (DEBUG) Log.v(TAG, "saveAllState: no fragments!");
|
|
return null;
|
|
}
|
|
|
|
ArrayList<String> added = null;
|
|
BackStackState[] backStack = null;
|
|
|
|
// Build list of currently added fragments.
|
|
size = mAdded.size();
|
|
if (size > 0) {
|
|
added = new ArrayList<>(size);
|
|
for (Fragment f : mAdded) {
|
|
added.add(f.mWho);
|
|
if (f.mFragmentManager != this) {
|
|
throwException(new IllegalStateException(
|
|
"Failure saving state: active " + f
|
|
+ " was removed from the FragmentManager"));
|
|
}
|
|
if (DEBUG) {
|
|
Log.v(TAG, "saveAllState: adding fragment (" + f.mWho
|
|
+ "): " + f);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now save back stack.
|
|
if (mBackStack != null) {
|
|
size = mBackStack.size();
|
|
if (size > 0) {
|
|
backStack = new BackStackState[size];
|
|
for (int i = 0; i < size; i++) {
|
|
backStack[i] = new BackStackState(mBackStack.get(i));
|
|
if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i
|
|
+ ": " + mBackStack.get(i));
|
|
}
|
|
}
|
|
}
|
|
|
|
FragmentManagerState fms = new FragmentManagerState();
|
|
fms.mActive = active;
|
|
fms.mAdded = added;
|
|
fms.mBackStack = backStack;
|
|
if (mPrimaryNav != null) {
|
|
fms.mPrimaryNavActiveWho = mPrimaryNav.mWho;
|
|
}
|
|
fms.mNextFragmentIndex = mNextFragmentIndex;
|
|
return fms;
|
|
}
|
|
|
|
void restoreAllState(Parcelable state, FragmentManagerNonConfig nonConfig) {
|
|
if (mHost instanceof ViewModelStoreOwner) {
|
|
throwException(new IllegalStateException("You must use restoreSaveState when your "
|
|
+ "FragmentHostCallback implements ViewModelStoreOwner"));
|
|
}
|
|
mNonConfig.restoreFromSnapshot(nonConfig);
|
|
restoreSaveState(state);
|
|
}
|
|
|
|
void restoreSaveState(Parcelable state) {
|
|
// If there is no saved state at all, then there's nothing else to do
|
|
if (state == null) return;
|
|
FragmentManagerState fms = (FragmentManagerState)state;
|
|
if (fms.mActive == null) return;
|
|
|
|
// First re-attach any non-config instances we are retaining back
|
|
// to their saved state, so we don't try to instantiate them again.
|
|
for (Fragment f : mNonConfig.getRetainedFragments()) {
|
|
if (DEBUG) Log.v(TAG, "restoreSaveState: re-attaching retained " + f);
|
|
FragmentState fs = null;
|
|
for (FragmentState fragmentState : fms.mActive) {
|
|
if (fragmentState.mWho.equals(f.mWho)) {
|
|
fs = fragmentState;
|
|
break;
|
|
}
|
|
}
|
|
if (fs == null) {
|
|
if (DEBUG) {
|
|
Log.v(TAG, "Discarding retained Fragment " + f
|
|
+ " that was not found in the set of active Fragments " + fms.mActive);
|
|
}
|
|
// We need to ensure that onDestroy and any other clean up is done
|
|
// so move the Fragment up to CREATED, then mark it as being removed, then
|
|
// destroy it.
|
|
moveToState(f, Fragment.CREATED, 0, 0, false);
|
|
f.mRemoving = true;
|
|
moveToState(f, Fragment.INITIALIZING, 0, 0, false);
|
|
continue;
|
|
}
|
|
fs.mInstance = f;
|
|
f.mSavedViewState = null;
|
|
f.mBackStackNesting = 0;
|
|
f.mInLayout = false;
|
|
f.mAdded = false;
|
|
f.mTargetWho = f.mTarget != null ? f.mTarget.mWho : null;
|
|
f.mTarget = null;
|
|
if (fs.mSavedFragmentState != null) {
|
|
fs.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader());
|
|
f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray(
|
|
FragmentManagerImpl.VIEW_STATE_TAG);
|
|
f.mSavedFragmentState = fs.mSavedFragmentState;
|
|
}
|
|
}
|
|
|
|
// Build the full list of active fragments, instantiating them from
|
|
// their saved state.
|
|
mActive.clear();
|
|
for (FragmentState fs : fms.mActive) {
|
|
if (fs != null) {
|
|
Fragment f = fs.instantiate(mHost.getContext().getClassLoader(),
|
|
getFragmentFactory());
|
|
f.mFragmentManager = this;
|
|
if (DEBUG) Log.v(TAG, "restoreSaveState: active (" + f.mWho + "): " + f);
|
|
mActive.put(f.mWho, f);
|
|
// Now that the fragment is instantiated (or came from being
|
|
// retained above), clear mInstance in case we end up re-restoring
|
|
// from this FragmentState again.
|
|
fs.mInstance = null;
|
|
}
|
|
}
|
|
|
|
// Build the list of currently added fragments.
|
|
mAdded.clear();
|
|
if (fms.mAdded != null) {
|
|
for (String who : fms.mAdded) {
|
|
Fragment f = mActive.get(who);
|
|
if (f == null) {
|
|
throwException(new IllegalStateException(
|
|
"No instantiated fragment for (" + who + ")"));
|
|
}
|
|
f.mAdded = true;
|
|
if (DEBUG) Log.v(TAG, "restoreSaveState: added (" + who + "): " + f);
|
|
if (mAdded.contains(f)) {
|
|
throw new IllegalStateException("Already added " + f);
|
|
}
|
|
synchronized (mAdded) {
|
|
mAdded.add(f);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Build the back stack.
|
|
if (fms.mBackStack != null) {
|
|
mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length);
|
|
for (int i=0; i<fms.mBackStack.length; i++) {
|
|
BackStackRecord bse = fms.mBackStack[i].instantiate(this);
|
|
if (DEBUG) {
|
|
Log.v(TAG, "restoreAllState: back stack #" + i
|
|
+ " (index " + bse.mIndex + "): " + bse);
|
|
LogWriter logw = new LogWriter(TAG);
|
|
PrintWriter pw = new PrintWriter(logw);
|
|
bse.dump(" ", pw, false);
|
|
pw.close();
|
|
}
|
|
mBackStack.add(bse);
|
|
if (bse.mIndex >= 0) {
|
|
setBackStackIndex(bse.mIndex, bse);
|
|
}
|
|
}
|
|
} else {
|
|
mBackStack = null;
|
|
}
|
|
|
|
if (fms.mPrimaryNavActiveWho != null) {
|
|
mPrimaryNav = mActive.get(fms.mPrimaryNavActiveWho);
|
|
dispatchParentPrimaryNavigationFragmentChanged(mPrimaryNav);
|
|
}
|
|
this.mNextFragmentIndex = fms.mNextFragmentIndex;
|
|
}
|
|
|
|
/**
|
|
* To prevent list modification errors, mActive sets values to null instead of
|
|
* removing them when the Fragment becomes inactive. This cleans up the list at the
|
|
* end of executing the transactions.
|
|
*/
|
|
private void burpActive() {
|
|
Collection<Fragment> values = mActive.values();
|
|
// values() provides a view into the map, so removing elements from it
|
|
// removes the relevant pairs in the Map
|
|
values.removeAll(Collections.singleton(null));
|
|
}
|
|
|
|
public void attachController(@NonNull FragmentHostCallback host,
|
|
@NonNull FragmentContainer container, @Nullable final Fragment parent) {
|
|
if (mHost != null) throw new IllegalStateException("Already attached");
|
|
mHost = host;
|
|
mContainer = container;
|
|
mParent = parent;
|
|
if (mParent != null) {
|
|
// Since the callback depends on us being the primary navigation fragment,
|
|
// update our callback now that we have a parent so that we have the correct
|
|
// state by default
|
|
updateOnBackPressedCallbackEnabled();
|
|
}
|
|
// Set up the OnBackPressedCallback
|
|
if (host instanceof OnBackPressedDispatcherOwner) {
|
|
OnBackPressedDispatcherOwner dispatcherOwner = ((OnBackPressedDispatcherOwner) host);
|
|
mOnBackPressedDispatcher = dispatcherOwner.getOnBackPressedDispatcher();
|
|
LifecycleOwner owner = parent != null ? parent : dispatcherOwner;
|
|
mOnBackPressedDispatcher.addCallback(owner, mOnBackPressedCallback);
|
|
}
|
|
|
|
// Get the FragmentManagerViewModel
|
|
if (parent != null) {
|
|
mNonConfig = parent.mFragmentManager.getChildNonConfig(parent);
|
|
} else if (host instanceof ViewModelStoreOwner) {
|
|
ViewModelStore viewModelStore = ((ViewModelStoreOwner) host).getViewModelStore();
|
|
mNonConfig = FragmentManagerViewModel.getInstance(viewModelStore);
|
|
} else {
|
|
mNonConfig = new FragmentManagerViewModel(false);
|
|
}
|
|
}
|
|
|
|
public void noteStateNotSaved() {
|
|
mStateSaved = false;
|
|
mStopped = false;
|
|
final int addedCount = mAdded.size();
|
|
for (int i = 0; i < addedCount; i++) {
|
|
Fragment fragment = mAdded.get(i);
|
|
if (fragment != null) {
|
|
fragment.noteStateNotSaved();
|
|
}
|
|
}
|
|
}
|
|
|
|
public void dispatchCreate() {
|
|
mStateSaved = false;
|
|
mStopped = false;
|
|
dispatchStateChange(Fragment.CREATED);
|
|
}
|
|
|
|
public void dispatchActivityCreated() {
|
|
mStateSaved = false;
|
|
mStopped = false;
|
|
dispatchStateChange(Fragment.ACTIVITY_CREATED);
|
|
}
|
|
|
|
public void dispatchStart() {
|
|
mStateSaved = false;
|
|
mStopped = false;
|
|
dispatchStateChange(Fragment.STARTED);
|
|
}
|
|
|
|
public void dispatchResume() {
|
|
mStateSaved = false;
|
|
mStopped = false;
|
|
dispatchStateChange(Fragment.RESUMED);
|
|
}
|
|
|
|
public void dispatchPause() {
|
|
dispatchStateChange(Fragment.STARTED);
|
|
}
|
|
|
|
public void dispatchStop() {
|
|
mStopped = true;
|
|
dispatchStateChange(Fragment.ACTIVITY_CREATED);
|
|
}
|
|
|
|
public void dispatchDestroyView() {
|
|
dispatchStateChange(Fragment.CREATED);
|
|
}
|
|
|
|
public void dispatchDestroy() {
|
|
mDestroyed = true;
|
|
execPendingActions();
|
|
dispatchStateChange(Fragment.INITIALIZING);
|
|
mHost = null;
|
|
mContainer = null;
|
|
mParent = null;
|
|
if (mOnBackPressedDispatcher != null) {
|
|
// mOnBackPressedDispatcher can hold a reference to the host
|
|
// so we need to null it out to prevent memory leaks
|
|
mOnBackPressedCallback.remove();
|
|
mOnBackPressedDispatcher = null;
|
|
}
|
|
}
|
|
|
|
private void dispatchStateChange(int nextState) {
|
|
try {
|
|
mExecutingActions = true;
|
|
moveToState(nextState, false);
|
|
} finally {
|
|
mExecutingActions = false;
|
|
}
|
|
execPendingActions();
|
|
}
|
|
|
|
public void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode) {
|
|
for (int i = mAdded.size() - 1; i >= 0; --i) {
|
|
final Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
f.performMultiWindowModeChanged(isInMultiWindowMode);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode) {
|
|
for (int i = mAdded.size() - 1; i >= 0; --i) {
|
|
final Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
f.performPictureInPictureModeChanged(isInPictureInPictureMode);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void dispatchConfigurationChanged(@NonNull Configuration newConfig) {
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
f.performConfigurationChanged(newConfig);
|
|
}
|
|
}
|
|
}
|
|
|
|
public void dispatchLowMemory() {
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
f.performLowMemory();
|
|
}
|
|
}
|
|
}
|
|
|
|
public boolean dispatchCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return false;
|
|
}
|
|
boolean show = false;
|
|
ArrayList<Fragment> newMenus = null;
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
if (f.performCreateOptionsMenu(menu, inflater)) {
|
|
show = true;
|
|
if (newMenus == null) {
|
|
newMenus = new ArrayList<Fragment>();
|
|
}
|
|
newMenus.add(f);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mCreatedMenus != null) {
|
|
for (int i=0; i<mCreatedMenus.size(); i++) {
|
|
Fragment f = mCreatedMenus.get(i);
|
|
if (newMenus == null || !newMenus.contains(f)) {
|
|
f.onDestroyOptionsMenu();
|
|
}
|
|
}
|
|
}
|
|
|
|
mCreatedMenus = newMenus;
|
|
|
|
return show;
|
|
}
|
|
|
|
public boolean dispatchPrepareOptionsMenu(@NonNull Menu menu) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return false;
|
|
}
|
|
boolean show = false;
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
if (f.performPrepareOptionsMenu(menu)) {
|
|
show = true;
|
|
}
|
|
}
|
|
}
|
|
return show;
|
|
}
|
|
|
|
public boolean dispatchOptionsItemSelected(@NonNull MenuItem item) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return false;
|
|
}
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
if (f.performOptionsItemSelected(item)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public boolean dispatchContextItemSelected(@NonNull MenuItem item) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return false;
|
|
}
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
if (f.performContextItemSelected(item)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public void dispatchOptionsMenuClosed(@NonNull Menu menu) {
|
|
if (mCurState < Fragment.CREATED) {
|
|
return;
|
|
}
|
|
for (int i = 0; i < mAdded.size(); i++) {
|
|
Fragment f = mAdded.get(i);
|
|
if (f != null) {
|
|
f.performOptionsMenuClosed(menu);
|
|
}
|
|
}
|
|
}
|
|
|
|
@SuppressWarnings("ReferenceEquality")
|
|
public void setPrimaryNavigationFragment(Fragment f) {
|
|
if (f != null && (mActive.get(f.mWho) != f
|
|
|| (f.mHost != null && f.getFragmentManager() != this))) {
|
|
throw new IllegalArgumentException("Fragment " + f
|
|
+ " is not an active fragment of FragmentManager " + this);
|
|
}
|
|
Fragment previousPrimaryNav = mPrimaryNav;
|
|
mPrimaryNav = f;
|
|
dispatchParentPrimaryNavigationFragmentChanged(previousPrimaryNav);
|
|
dispatchParentPrimaryNavigationFragmentChanged(mPrimaryNav);
|
|
}
|
|
|
|
private void dispatchParentPrimaryNavigationFragmentChanged(@Nullable Fragment f) {
|
|
if (f != null && mActive.get(f.mWho) == f) {
|
|
f.performPrimaryNavigationFragmentChanged();
|
|
}
|
|
}
|
|
|
|
void dispatchPrimaryNavigationFragmentChanged() {
|
|
updateOnBackPressedCallbackEnabled();
|
|
// Dispatch the change event to this FragmentManager's primary navigation fragment
|
|
dispatchParentPrimaryNavigationFragmentChanged(mPrimaryNav);
|
|
}
|
|
|
|
@Override
|
|
@Nullable
|
|
public Fragment getPrimaryNavigationFragment() {
|
|
return mPrimaryNav;
|
|
}
|
|
|
|
public void setMaxLifecycle(Fragment f, Lifecycle.State state) {
|
|
if ((mActive.get(f.mWho) != f
|
|
|| (f.mHost != null && f.getFragmentManager() != this))) {
|
|
throw new IllegalArgumentException("Fragment " + f
|
|
+ " is not an active fragment of FragmentManager " + this);
|
|
}
|
|
f.mMaxState = state;
|
|
}
|
|
|
|
@Override
|
|
@NonNull
|
|
public FragmentFactory getFragmentFactory() {
|
|
FragmentFactory factory = super.getFragmentFactory();
|
|
if (factory == DEFAULT_FACTORY) {
|
|
if (mParent != null) {
|
|
// This can't call setFragmentFactory since we need to
|
|
// compute this each time getFragmentFactory() is called
|
|
// so that if the parent's FragmentFactory changes, we
|
|
// pick the change up here.
|
|
return mParent.mFragmentManager.getFragmentFactory();
|
|
}
|
|
setFragmentFactory(new FragmentFactory() {
|
|
@SuppressWarnings("deprecation")
|
|
@NonNull
|
|
@Override
|
|
public Fragment instantiate(@NonNull ClassLoader classLoader,
|
|
@NonNull String className) {
|
|
return mHost.instantiate(mHost.getContext(), className, null);
|
|
}
|
|
});
|
|
}
|
|
return super.getFragmentFactory();
|
|
}
|
|
|
|
@Override
|
|
public void registerFragmentLifecycleCallbacks(@NonNull FragmentLifecycleCallbacks cb,
|
|
boolean recursive) {
|
|
mLifecycleCallbacks.add(new FragmentLifecycleCallbacksHolder(cb, recursive));
|
|
}
|
|
|
|
@Override
|
|
public void unregisterFragmentLifecycleCallbacks(@NonNull FragmentLifecycleCallbacks cb) {
|
|
synchronized (mLifecycleCallbacks) {
|
|
for (int i = 0, N = mLifecycleCallbacks.size(); i < N; i++) {
|
|
if (mLifecycleCallbacks.get(i).mCallback == cb) {
|
|
mLifecycleCallbacks.remove(i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentPreAttached(@NonNull Fragment f, @NonNull Context context,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentPreAttached(f, context, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentPreAttached(this, f, context);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentAttached(@NonNull Fragment f, @NonNull Context context,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentAttached(f, context, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentAttached(this, f, context);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentPreCreated(@NonNull Fragment f, @Nullable Bundle savedInstanceState,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentPreCreated(f, savedInstanceState, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentPreCreated(this, f, savedInstanceState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentCreated(@NonNull Fragment f, @Nullable Bundle savedInstanceState,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentCreated(f, savedInstanceState, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentCreated(this, f, savedInstanceState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentActivityCreated(@NonNull Fragment f, @Nullable Bundle savedInstanceState,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentActivityCreated(f, savedInstanceState, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentActivityCreated(this, f, savedInstanceState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentViewCreated(@NonNull Fragment f, @NonNull View v,
|
|
@Nullable Bundle savedInstanceState, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentViewCreated(f, v, savedInstanceState, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentViewCreated(this, f, v, savedInstanceState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentStarted(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentStarted(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentStarted(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentResumed(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentResumed(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentResumed(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentPaused(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentPaused(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentPaused(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentStopped(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentStopped(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentStopped(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentSaveInstanceState(@NonNull Fragment f, @NonNull Bundle outState,
|
|
boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentSaveInstanceState(f, outState, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentSaveInstanceState(this, f, outState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentViewDestroyed(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentViewDestroyed(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentViewDestroyed(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentDestroyed(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentDestroyed(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentDestroyed(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
void dispatchOnFragmentDetached(@NonNull Fragment f, boolean onlyRecursive) {
|
|
if (mParent != null) {
|
|
FragmentManager parentManager = mParent.getFragmentManager();
|
|
if (parentManager instanceof FragmentManagerImpl) {
|
|
((FragmentManagerImpl) parentManager)
|
|
.dispatchOnFragmentDetached(f, true);
|
|
}
|
|
}
|
|
for (FragmentLifecycleCallbacksHolder holder : mLifecycleCallbacks) {
|
|
if (!onlyRecursive || holder.mRecursive) {
|
|
holder.mCallback.onFragmentDetached(this, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Checks if fragments that belong to this fragment manager (or their children) have menus,
|
|
// and if they are visible.
|
|
boolean checkForMenus() {
|
|
boolean hasMenu = false;
|
|
for (Fragment f: mActive.values()) {
|
|
if (f != null) {
|
|
hasMenu = isMenuAvailable(f);
|
|
}
|
|
if (hasMenu) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private boolean isMenuAvailable(Fragment f) {
|
|
return f.mHasMenu && f.mMenuVisible || f.mChildFragmentManager.checkForMenus();
|
|
}
|
|
|
|
public static int reverseTransit(int transit) {
|
|
int rev = 0;
|
|
switch (transit) {
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_OPEN:
|
|
rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE;
|
|
break;
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE:
|
|
rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN;
|
|
break;
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_FADE:
|
|
rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE;
|
|
break;
|
|
}
|
|
return rev;
|
|
|
|
}
|
|
|
|
public static final int ANIM_STYLE_OPEN_ENTER = 1;
|
|
public static final int ANIM_STYLE_OPEN_EXIT = 2;
|
|
public static final int ANIM_STYLE_CLOSE_ENTER = 3;
|
|
public static final int ANIM_STYLE_CLOSE_EXIT = 4;
|
|
public static final int ANIM_STYLE_FADE_ENTER = 5;
|
|
public static final int ANIM_STYLE_FADE_EXIT = 6;
|
|
|
|
public static int transitToStyleIndex(int transit, boolean enter) {
|
|
int animAttr = -1;
|
|
switch (transit) {
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_OPEN:
|
|
animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT;
|
|
break;
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE:
|
|
animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT;
|
|
break;
|
|
case FragmentTransaction.TRANSIT_FRAGMENT_FADE:
|
|
animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT;
|
|
break;
|
|
}
|
|
return animAttr;
|
|
}
|
|
|
|
@Override
|
|
@Nullable
|
|
public View onCreateView(@Nullable View parent, @NonNull String name, @NonNull Context context,
|
|
@NonNull AttributeSet attrs) {
|
|
if (!"fragment".equals(name)) {
|
|
return null;
|
|
}
|
|
|
|
String fname = attrs.getAttributeValue(null, "class");
|
|
TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment);
|
|
if (fname == null) {
|
|
fname = a.getString(FragmentTag.Fragment_name);
|
|
}
|
|
int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID);
|
|
String tag = a.getString(FragmentTag.Fragment_tag);
|
|
a.recycle();
|
|
|
|
if (fname == null || !FragmentFactory.isFragmentClass(context.getClassLoader(), fname)) {
|
|
// Invalid support lib fragment; let the device's framework handle it.
|
|
// This will allow android.app.Fragments to do the right thing.
|
|
return null;
|
|
}
|
|
|
|
int containerId = parent != null ? parent.getId() : 0;
|
|
if (containerId == View.NO_ID && id == View.NO_ID && tag == null) {
|
|
throw new IllegalArgumentException(attrs.getPositionDescription()
|
|
+ ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname);
|
|
}
|
|
|
|
// If we restored from a previous state, we may already have
|
|
// instantiated this fragment from the state and should use
|
|
// that instance instead of making a new one.
|
|
Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null;
|
|
if (fragment == null && tag != null) {
|
|
fragment = findFragmentByTag(tag);
|
|
}
|
|
if (fragment == null && containerId != View.NO_ID) {
|
|
fragment = findFragmentById(containerId);
|
|
}
|
|
|
|
if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x"
|
|
+ Integer.toHexString(id) + " fname=" + fname
|
|
+ " existing=" + fragment);
|
|
if (fragment == null) {
|
|
fragment = getFragmentFactory().instantiate(context.getClassLoader(), fname);
|
|
fragment.mFromLayout = true;
|
|
fragment.mFragmentId = id != 0 ? id : containerId;
|
|
fragment.mContainerId = containerId;
|
|
fragment.mTag = tag;
|
|
fragment.mInLayout = true;
|
|
fragment.mFragmentManager = this;
|
|
fragment.mHost = mHost;
|
|
fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState);
|
|
addFragment(fragment, true);
|
|
|
|
} else if (fragment.mInLayout) {
|
|
// A fragment already exists and it is not one we restored from
|
|
// previous state.
|
|
throw new IllegalArgumentException(attrs.getPositionDescription()
|
|
+ ": Duplicate id 0x" + Integer.toHexString(id)
|
|
+ ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId)
|
|
+ " with another fragment for " + fname);
|
|
} else {
|
|
// This fragment was retained from a previous instance; get it
|
|
// going now.
|
|
fragment.mInLayout = true;
|
|
fragment.mHost = mHost;
|
|
// Give the Fragment the attributes to initialize itself.
|
|
fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState);
|
|
}
|
|
|
|
// If we haven't finished entering the CREATED state ourselves yet,
|
|
// push the inflated child fragment along. This will ensureInflatedFragmentView
|
|
// at the right phase of the lifecycle so that we will have mView populated
|
|
// for compliant fragments below.
|
|
if (mCurState < Fragment.CREATED && fragment.mFromLayout) {
|
|
moveToState(fragment, Fragment.CREATED, 0, 0, false);
|
|
} else {
|
|
moveToState(fragment);
|
|
}
|
|
|
|
if (fragment.mView == null) {
|
|
// MOD: Fragment didn't create a view fix
|
|
return null;
|
|
//throw new IllegalStateException("Fragment " + fname
|
|
// + " did not create a view.");
|
|
}
|
|
if (id != 0) {
|
|
fragment.mView.setId(id);
|
|
}
|
|
if (fragment.mView.getTag() == null) {
|
|
fragment.mView.setTag(tag);
|
|
}
|
|
return fragment.mView;
|
|
}
|
|
|
|
@Override
|
|
public View onCreateView(String name, Context context, AttributeSet attrs) {
|
|
return onCreateView(null, name, context, attrs);
|
|
}
|
|
|
|
LayoutInflater.Factory2 getLayoutInflaterFactory() {
|
|
return this;
|
|
}
|
|
|
|
static class FragmentTag {
|
|
public static final int[] Fragment = {
|
|
0x01010003, 0x010100d0, 0x010100d1
|
|
};
|
|
public static final int Fragment_id = 1;
|
|
public static final int Fragment_name = 0;
|
|
public static final int Fragment_tag = 2;
|
|
|
|
private FragmentTag() {
|
|
}
|
|
}
|
|
|
|
/**
|
|
* An add or pop transaction to be scheduled for the UI thread.
|
|
*/
|
|
interface OpGenerator {
|
|
/**
|
|
* Generate transactions to add to {@code records} and whether or not the transaction is
|
|
* an add or pop to {@code isRecordPop}.
|
|
*
|
|
* records and isRecordPop must be added equally so that each transaction in records
|
|
* matches the boolean for whether or not it is a pop in isRecordPop.
|
|
*
|
|
* @param records A list to add transactions to.
|
|
* @param isRecordPop A list to add whether or not the transactions added to records is
|
|
* a pop transaction.
|
|
* @return true if something was added or false otherwise.
|
|
*/
|
|
boolean generateOps(ArrayList<BackStackRecord> records, ArrayList<Boolean> isRecordPop);
|
|
}
|
|
|
|
/**
|
|
* A pop operation OpGenerator. This will be run on the UI thread and will generate the
|
|
* transactions that will be popped if anything can be popped.
|
|
*/
|
|
private class PopBackStackState implements OpGenerator {
|
|
final String mName;
|
|
final int mId;
|
|
final int mFlags;
|
|
|
|
PopBackStackState(String name, int id, int flags) {
|
|
mName = name;
|
|
mId = id;
|
|
mFlags = flags;
|
|
}
|
|
|
|
@Override
|
|
public boolean generateOps(ArrayList<BackStackRecord> records,
|
|
ArrayList<Boolean> isRecordPop) {
|
|
if (mPrimaryNav != null // We have a primary nav fragment
|
|
&& mId < 0 // No valid id (since they're local)
|
|
&& mName == null) { // no name to pop to (since they're local)
|
|
final FragmentManager childManager = mPrimaryNav.getChildFragmentManager();
|
|
if (childManager.popBackStackImmediate()) {
|
|
// We didn't add any operations for this FragmentManager even though
|
|
// a child did do work.
|
|
return false;
|
|
}
|
|
}
|
|
return popBackStackState(records, isRecordPop, mName, mId, mFlags);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A listener for a postponed transaction. This waits until
|
|
* {@link Fragment#startPostponedEnterTransition()} is called or a transaction is started
|
|
* that interacts with this one, based on interactions with the fragment container.
|
|
*/
|
|
static class StartEnterTransitionListener
|
|
implements Fragment.OnStartEnterTransitionListener {
|
|
final boolean mIsBack;
|
|
final BackStackRecord mRecord;
|
|
private int mNumPostponed;
|
|
|
|
StartEnterTransitionListener(BackStackRecord record, boolean isBack) {
|
|
mIsBack = isBack;
|
|
mRecord = record;
|
|
}
|
|
|
|
/**
|
|
* Called from {@link Fragment#startPostponedEnterTransition()}, this decreases the
|
|
* number of Fragments that are postponed. This may cause the transaction to schedule
|
|
* to finish running and run transitions and animations.
|
|
*/
|
|
@Override
|
|
public void onStartEnterTransition() {
|
|
mNumPostponed--;
|
|
if (mNumPostponed != 0) {
|
|
return;
|
|
}
|
|
mRecord.mManager.scheduleCommit();
|
|
}
|
|
|
|
/**
|
|
* Called from {@link Fragment#
|
|
* setOnStartEnterTransitionListener(Fragment.OnStartEnterTransitionListener)}, this
|
|
* increases the number of fragments that are postponed as part of this transaction.
|
|
*/
|
|
@Override
|
|
public void startListening() {
|
|
mNumPostponed++;
|
|
}
|
|
|
|
/**
|
|
* @return true if there are no more postponed fragments as part of the transaction.
|
|
*/
|
|
public boolean isReady() {
|
|
return mNumPostponed == 0;
|
|
}
|
|
|
|
/**
|
|
* Completes the transaction and start the animations and transitions. This may skip
|
|
* the transitions if this is called before all fragments have called
|
|
* {@link Fragment#startPostponedEnterTransition()}.
|
|
*/
|
|
public void completeTransaction() {
|
|
final boolean canceled;
|
|
canceled = mNumPostponed > 0;
|
|
FragmentManagerImpl manager = mRecord.mManager;
|
|
final int numAdded = manager.mAdded.size();
|
|
for (int i = 0; i < numAdded; i++) {
|
|
final Fragment fragment = manager.mAdded.get(i);
|
|
fragment.setOnStartEnterTransitionListener(null);
|
|
if (canceled && fragment.isPostponed()) {
|
|
fragment.startPostponedEnterTransition();
|
|
}
|
|
}
|
|
mRecord.mManager.completeExecute(mRecord, mIsBack, !canceled, true);
|
|
}
|
|
|
|
/**
|
|
* Cancels this transaction instead of completing it. That means that the state isn't
|
|
* changed, so the pop results in no change to the state.
|
|
*/
|
|
public void cancelTransaction() {
|
|
mRecord.mManager.completeExecute(mRecord, mIsBack, false, false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Contains either an animator or animation. One of these should be null.
|
|
*/
|
|
private static class AnimationOrAnimator {
|
|
public final Animation animation;
|
|
public final Animator animator;
|
|
|
|
AnimationOrAnimator(Animation animation) {
|
|
this.animation = animation;
|
|
this.animator = null;
|
|
if (animation == null) {
|
|
throw new IllegalStateException("Animation cannot be null");
|
|
}
|
|
}
|
|
|
|
AnimationOrAnimator(Animator animator) {
|
|
this.animation = null;
|
|
this.animator = animator;
|
|
if (animator == null) {
|
|
throw new IllegalStateException("Animator cannot be null");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* We must call endViewTransition() before the animation ends or else the parent doesn't
|
|
* get nulled out. We use both startViewTransition() and startAnimation() to solve a problem
|
|
* with Views remaining in the hierarchy as disappearing children after the view has been
|
|
* removed in some edge cases.
|
|
*/
|
|
private static class EndViewTransitionAnimation extends AnimationSet implements Runnable {
|
|
private final ViewGroup mParent;
|
|
private final View mChild;
|
|
private boolean mEnded;
|
|
private boolean mTransitionEnded;
|
|
private boolean mAnimating = true;
|
|
|
|
EndViewTransitionAnimation(@NonNull Animation animation,
|
|
@NonNull ViewGroup parent, @NonNull View child) {
|
|
super(false);
|
|
mParent = parent;
|
|
mChild = child;
|
|
addAnimation(animation);
|
|
// We must call endViewTransition() even if the animation was never run or it
|
|
// is interrupted in a way that can't be detected easily (app put in background)
|
|
mParent.post(this);
|
|
}
|
|
|
|
@Override
|
|
public boolean getTransformation(long currentTime, Transformation t) {
|
|
mAnimating = true;
|
|
if (mEnded) {
|
|
return !mTransitionEnded;
|
|
}
|
|
boolean more = super.getTransformation(currentTime, t);
|
|
if (!more) {
|
|
mEnded = true;
|
|
OneShotPreDrawListener.add(mParent, this);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public boolean getTransformation(long currentTime, Transformation outTransformation,
|
|
float scale) {
|
|
mAnimating = true;
|
|
if (mEnded) {
|
|
return !mTransitionEnded;
|
|
}
|
|
boolean more = super.getTransformation(currentTime, outTransformation, scale);
|
|
if (!more) {
|
|
mEnded = true;
|
|
OneShotPreDrawListener.add(mParent, this);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
if (!mEnded && mAnimating) {
|
|
mAnimating = false;
|
|
// Called while animating, so we'll check again on next cycle
|
|
mParent.post(this);
|
|
} else {
|
|
mParent.endViewTransition(mChild);
|
|
mTransitionEnded = true;
|
|
}
|
|
}
|
|
}
|
|
}
|