| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.support.v4.app; |
| |
| import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorInflater; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.AnimatorSet; |
| import android.animation.PropertyValuesHolder; |
| import android.animation.ValueAnimator; |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources.NotFoundException; |
| import android.content.res.TypedArray; |
| import android.os.Build; |
| import android.os.Bundle; |
| import android.os.Looper; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.support.annotation.CallSuper; |
| import android.support.annotation.IdRes; |
| import android.support.annotation.NonNull; |
| import android.support.annotation.RestrictTo; |
| import android.support.annotation.StringRes; |
| import android.support.v4.util.ArraySet; |
| import android.support.v4.util.DebugUtils; |
| import android.support.v4.util.LogWriter; |
| import android.support.v4.util.Pair; |
| import android.support.v4.view.ViewCompat; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.util.SparseArray; |
| import android.view.LayoutInflater; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.animation.AccelerateInterpolator; |
| import android.view.animation.AlphaAnimation; |
| import android.view.animation.Animation; |
| import android.view.animation.Animation.AnimationListener; |
| import android.view.animation.AnimationSet; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.DecelerateInterpolator; |
| import android.view.animation.Interpolator; |
| import android.view.animation.ScaleAnimation; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Static library support version of the framework's {@link android.app.FragmentManager}. |
| * Used to write apps that run on platforms prior to Android 3.0. When running |
| * on Android 3.0 or above, this implementation is still used; it does not try |
| * to switch to the framework's implementation. See the framework {@link FragmentManager} |
| * documentation for a class overview. |
| * |
| * <p>Your activity must derive from {@link FragmentActivity} to use this. From such an activity, |
| * you can acquire the {@link FragmentManager} by calling |
| * {@link FragmentActivity#getSupportFragmentManager}. |
| */ |
| public abstract class FragmentManager { |
| /** |
| * Representation of an entry on the fragment back stack, as created |
| * with {@link FragmentTransaction#addToBackStack(String) |
| * FragmentTransaction.addToBackStack()}. Entries can later be |
| * retrieved with {@link FragmentManager#getBackStackEntryAt(int) |
| * FragmentManager.getBackStackEntryAt()}. |
| * |
| * <p>Note that you should never hold on to a BackStackEntry object; |
| * the identifier as returned by {@link #getId} is the only thing that |
| * will be persisted across activity instances. |
| */ |
| public interface BackStackEntry { |
| /** |
| * Return the unique identifier for the entry. This is the only |
| * representation of the entry that will persist across activity |
| * instances. |
| */ |
| public int getId(); |
| |
| /** |
| * Get the name that was supplied to |
| * {@link FragmentTransaction#addToBackStack(String) |
| * FragmentTransaction.addToBackStack(String)} when creating this entry. |
| */ |
| public String getName(); |
| |
| /** |
| * Return the full bread crumb title resource identifier for the entry, |
| * or 0 if it does not have one. |
| */ |
| @StringRes |
| public int getBreadCrumbTitleRes(); |
| |
| /** |
| * Return the short bread crumb title resource identifier for the entry, |
| * or 0 if it does not have one. |
| */ |
| @StringRes |
| public int getBreadCrumbShortTitleRes(); |
| |
| /** |
| * Return the full bread crumb title for the entry, or null if it |
| * does not have one. |
| */ |
| public CharSequence getBreadCrumbTitle(); |
| |
| /** |
| * Return the short bread crumb title for the entry, or null if it |
| * does not have one. |
| */ |
| public CharSequence getBreadCrumbShortTitle(); |
| } |
| |
| /** |
| * Interface to watch for changes to the back stack. |
| */ |
| public interface OnBackStackChangedListener { |
| /** |
| * Called whenever the contents of the back stack change. |
| */ |
| public void onBackStackChanged(); |
| } |
| |
| /** |
| * Start a series of edit operations on the Fragments associated with |
| * this FragmentManager. |
| * |
| * <p>Note: A fragment transaction can only be created/committed prior |
| * to an activity saving its state. If you try to commit a transaction |
| * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} |
| * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} |
| * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. |
| * This is because the framework takes care of saving your current fragments |
| * in the state, and if changes are made after the state is saved then they |
| * will be lost.</p> |
| */ |
| public abstract FragmentTransaction beginTransaction(); |
| |
| /** |
| * @hide -- remove once prebuilts are in. |
| * @deprecated |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| @Deprecated |
| public FragmentTransaction openTransaction() { |
| return beginTransaction(); |
| } |
| |
| /** |
| * After a {@link FragmentTransaction} is committed with |
| * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it |
| * is scheduled to be executed asynchronously on the process's main thread. |
| * If you want to immediately executing any such pending operations, you |
| * can call this function (only from the main thread) to do so. Note that |
| * all callbacks and other related behavior will be done from within this |
| * call, so be careful about where this is called from. |
| * |
| * <p>If you are committing a single transaction that does not modify the |
| * fragment back stack, strongly consider using |
| * {@link FragmentTransaction#commitNow()} instead. This can help avoid |
| * unwanted side effects when other code in your app has pending committed |
| * transactions that expect different timing.</p> |
| * <p> |
| * This also forces the start of any postponed Transactions where |
| * {@link Fragment#postponeEnterTransition()} has been called. |
| * |
| * @return Returns true if there were any pending transactions to be |
| * executed. |
| */ |
| public abstract boolean executePendingTransactions(); |
| |
| /** |
| * Finds a fragment that was identified by the given id either when inflated |
| * from XML or as the container ID when added in a transaction. This first |
| * searches through fragments that are currently added to the manager's |
| * activity; if no such fragment is found, then all fragments currently |
| * on the back stack associated with this ID are searched. |
| * @return The fragment if found or null otherwise. |
| */ |
| public abstract Fragment findFragmentById(@IdRes int id); |
| |
| /** |
| * Finds a fragment that was identified by the given tag either when inflated |
| * from XML or as supplied when added in a transaction. This first |
| * searches through fragments that are currently added to the manager's |
| * activity; if no such fragment is found, then all fragments currently |
| * on the back stack are searched. |
| * @return The fragment if found or null otherwise. |
| */ |
| public abstract Fragment findFragmentByTag(String tag); |
| |
| /** |
| * Flag for {@link #popBackStack(String, int)} |
| * and {@link #popBackStack(int, int)}: If set, and the name or ID of |
| * a back stack entry has been supplied, then all matching entries will |
| * be consumed until one that doesn't match is found or the bottom of |
| * the stack is reached. Otherwise, all entries up to but not including that entry |
| * will be removed. |
| */ |
| public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; |
| |
| /** |
| * Pop the top state off the back stack. Returns true if there was one |
| * to pop, else false. This function is asynchronous -- it enqueues the |
| * request to pop, but the action will not be performed until the application |
| * returns to its event loop. |
| */ |
| public abstract void popBackStack(); |
| |
| /** |
| * Like {@link #popBackStack()}, but performs the operation immediately |
| * inside of the call. This is like calling {@link #executePendingTransactions()} |
| * afterwards without forcing the start of postponed Transactions. |
| * @return Returns true if there was something popped, else false. |
| */ |
| public abstract boolean popBackStackImmediate(); |
| |
| /** |
| * Pop the last fragment transition from the manager's fragment |
| * back stack. If there is nothing to pop, false is returned. |
| * This function is asynchronous -- it enqueues the |
| * request to pop, but the action will not be performed until the application |
| * returns to its event loop. |
| * |
| * @param name If non-null, this is the name of a previous back state |
| * to look for; if found, all states up to that state will be popped. The |
| * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether |
| * the named state itself is popped. If null, only the top state is popped. |
| * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. |
| */ |
| public abstract void popBackStack(String name, int flags); |
| |
| /** |
| * Like {@link #popBackStack(String, int)}, but performs the operation immediately |
| * inside of the call. This is like calling {@link #executePendingTransactions()} |
| * afterwards without forcing the start of postponed Transactions. |
| * @return Returns true if there was something popped, else false. |
| */ |
| public abstract boolean popBackStackImmediate(String name, int flags); |
| |
| /** |
| * Pop all back stack states up to the one with the given identifier. |
| * This function is asynchronous -- it enqueues the |
| * request to pop, but the action will not be performed until the application |
| * returns to its event loop. |
| * |
| * @param id Identifier of the stated to be popped. If no identifier exists, |
| * false is returned. |
| * The identifier is the number returned by |
| * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The |
| * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether |
| * the named state itself is popped. |
| * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. |
| */ |
| public abstract void popBackStack(int id, int flags); |
| |
| /** |
| * Like {@link #popBackStack(int, int)}, but performs the operation immediately |
| * inside of the call. This is like calling {@link #executePendingTransactions()} |
| * afterwards without forcing the start of postponed Transactions. |
| * @return Returns true if there was something popped, else false. |
| */ |
| public abstract boolean popBackStackImmediate(int id, int flags); |
| |
| /** |
| * Return the number of entries currently in the back stack. |
| */ |
| public abstract int getBackStackEntryCount(); |
| |
| /** |
| * Return the BackStackEntry at index <var>index</var> in the back stack; |
| * entries start index 0 being the bottom of the stack. |
| */ |
| public abstract BackStackEntry getBackStackEntryAt(int index); |
| |
| /** |
| * Add a new listener for changes to the fragment back stack. |
| */ |
| public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); |
| |
| /** |
| * Remove a listener that was previously added with |
| * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. |
| */ |
| public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); |
| |
| /** |
| * Put a reference to a fragment in a Bundle. This Bundle can be |
| * persisted as saved state, and when later restoring |
| * {@link #getFragment(Bundle, String)} will return the current |
| * instance of the same fragment. |
| * |
| * @param bundle The bundle in which to put the fragment reference. |
| * @param key The name of the entry in the bundle. |
| * @param fragment The Fragment whose reference is to be stored. |
| */ |
| public abstract void putFragment(Bundle bundle, String key, Fragment fragment); |
| |
| /** |
| * Retrieve the current Fragment instance for a reference previously |
| * placed with {@link #putFragment(Bundle, String, Fragment)}. |
| * |
| * @param bundle The bundle from which to retrieve the fragment reference. |
| * @param key The name of the entry in the bundle. |
| * @return Returns the current Fragment instance that is associated with |
| * the given reference. |
| */ |
| public abstract Fragment getFragment(Bundle bundle, String key); |
| |
| /** |
| * Get a list of all fragments that are currently added to the FragmentManager. |
| * This may include those that are hidden as well as those that are shown. |
| * This will not include any fragments only in the back stack, or fragments that |
| * are detached or removed. |
| * <p> |
| * The order of the fragments in the list is the order in which they were |
| * added or attached. |
| * |
| * @return A list of all fragments that are added to the FragmentManager. |
| */ |
| public abstract List<Fragment> getFragments(); |
| |
| /** |
| * Save the current instance state of the given Fragment. This can be |
| * used later when creating a new instance of the Fragment and adding |
| * it to the fragment manager, to have it create itself to match the |
| * current state returned here. Note that there are limits on how |
| * this can be used: |
| * |
| * <ul> |
| * <li>The Fragment must currently be attached to the FragmentManager. |
| * <li>A new Fragment created using this saved state must be the same class |
| * type as the Fragment it was created from. |
| * <li>The saved state can not contain dependencies on other fragments -- |
| * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to |
| * store a fragment reference because that reference may not be valid when |
| * this saved state is later used. Likewise the Fragment's target and |
| * result code are not included in this state. |
| * </ul> |
| * |
| * @param f The Fragment whose state is to be saved. |
| * @return The generated state. This will be null if there was no |
| * interesting state created by the fragment. |
| */ |
| public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); |
| |
| /** |
| * Returns true if the final {@link android.app.Activity#onDestroy() Activity.onDestroy()} |
| * call has been made on the FragmentManager's Activity, so this instance is now dead. |
| */ |
| public abstract boolean isDestroyed(); |
| |
| /** |
| * Registers a {@link FragmentLifecycleCallbacks} to listen to fragment lifecycle events |
| * happening in this FragmentManager. All registered callbacks will be automatically |
| * unregistered when this FragmentManager is destroyed. |
| * |
| * @param cb Callbacks to register |
| * @param recursive true to automatically register this callback for all child FragmentManagers |
| */ |
| public abstract void registerFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb, |
| boolean recursive); |
| |
| /** |
| * Unregisters a previously registered {@link FragmentLifecycleCallbacks}. If the callback |
| * was not previously registered this call has no effect. All registered callbacks will be |
| * automatically unregistered when this FragmentManager is destroyed. |
| * |
| * @param cb Callbacks to unregister |
| */ |
| public abstract void unregisterFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb); |
| |
| /** |
| * Return the currently active primary navigation fragment for this FragmentManager. |
| * The primary navigation fragment is set by fragment transactions using |
| * {@link FragmentTransaction#setPrimaryNavigationFragment(Fragment)}. |
| * |
| * <p>The primary navigation fragment's |
| * {@link Fragment#getChildFragmentManager() child FragmentManager} will be called first |
| * to process delegated navigation actions such as {@link #popBackStack()} if no ID |
| * or transaction name is provided to pop to.</p> |
| * |
| * @return the fragment designated as the primary navigation fragment |
| */ |
| public abstract Fragment getPrimaryNavigationFragment(); |
| |
| /** |
| * Print the FragmentManager's state into the given stream. |
| * |
| * @param prefix Text to print at the front of each line. |
| * @param fd The raw file descriptor that the dump is being sent to. |
| * @param writer A PrintWriter to which the dump is to be set. |
| * @param args Additional arguments to the dump request. |
| */ |
| public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); |
| |
| /** |
| * Control whether the framework's internal fragment manager debugging |
| * logs are turned on. If enabled, you will see output in logcat as |
| * the framework performs fragment operations. |
| */ |
| public static void enableDebugLogging(boolean enabled) { |
| FragmentManagerImpl.DEBUG = enabled; |
| } |
| |
| /** |
| * Returns {@code true} if the FragmentManager's state has already been saved |
| * by its host. Any operations that would change saved state should not be performed |
| * if this method returns true. For example, any popBackStack() method, such as |
| * {@link #popBackStackImmediate()} or any FragmentTransaction using |
| * {@link FragmentTransaction#commit()} instead of |
| * {@link FragmentTransaction#commitAllowingStateLoss()} will change |
| * the state and will result in an error. |
| * |
| * @return true if this FragmentManager's state has already been saved by its host |
| */ |
| public abstract boolean isStateSaved(); |
| |
| /** |
| * Callback interface for listening to fragment state changes that happen |
| * within a given FragmentManager. |
| */ |
| public abstract static class FragmentLifecycleCallbacks { |
| /** |
| * Called right before the fragment's {@link Fragment#onAttach(Context)} method is called. |
| * This is a good time to inject any required dependencies or perform other configuration |
| * for the fragment before any of the fragment's lifecycle methods are invoked. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param context Context that the Fragment is being attached to |
| */ |
| public void onFragmentPreAttached(FragmentManager fm, Fragment f, Context context) {} |
| |
| /** |
| * Called after the fragment has been attached to its host. Its host will have had |
| * <code>onAttachFragment</code> called before this call happens. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param context Context that the Fragment was attached to |
| */ |
| public void onFragmentAttached(FragmentManager fm, Fragment f, Context context) {} |
| |
| /** |
| * Called right before the fragment's {@link Fragment#onCreate(Bundle)} method is called. |
| * This is a good time to inject any required dependencies or perform other configuration |
| * for the fragment. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param savedInstanceState Saved instance bundle from a previous instance |
| */ |
| public void onFragmentPreCreated(FragmentManager fm, Fragment f, |
| Bundle savedInstanceState) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onCreate(Bundle)}. This will only happen once for any given |
| * fragment instance, though the fragment may be attached and detached multiple times. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param savedInstanceState Saved instance bundle from a previous instance |
| */ |
| public void onFragmentCreated(FragmentManager fm, Fragment f, Bundle savedInstanceState) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onActivityCreated(Bundle)}. This will only happen once for any given |
| * fragment instance, though the fragment may be attached and detached multiple times. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param savedInstanceState Saved instance bundle from a previous instance |
| */ |
| public void onFragmentActivityCreated(FragmentManager fm, Fragment f, |
| Bundle savedInstanceState) {} |
| |
| /** |
| * Called after the fragment has returned a non-null view from the FragmentManager's |
| * request to {@link Fragment#onCreateView(LayoutInflater, ViewGroup, Bundle)}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment that created and owns the view |
| * @param v View returned by the fragment |
| * @param savedInstanceState Saved instance bundle from a previous instance |
| */ |
| public void onFragmentViewCreated(FragmentManager fm, Fragment f, View v, |
| Bundle savedInstanceState) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onStart()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentStarted(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onResume()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentResumed(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onPause()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentPaused(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onStop()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentStopped(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onSaveInstanceState(Bundle)}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| * @param outState Saved state bundle for the fragment |
| */ |
| public void onFragmentSaveInstanceState(FragmentManager fm, Fragment f, Bundle outState) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onDestroyView()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentViewDestroyed(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onDestroy()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentDestroyed(FragmentManager fm, Fragment f) {} |
| |
| /** |
| * Called after the fragment has returned from the FragmentManager's call to |
| * {@link Fragment#onDetach()}. |
| * |
| * @param fm Host FragmentManager |
| * @param f Fragment changing state |
| */ |
| public void onFragmentDetached(FragmentManager fm, Fragment f) {} |
| } |
| } |
| |
| final class FragmentManagerState implements Parcelable { |
| FragmentState[] mActive; |
| int[] mAdded; |
| BackStackState[] mBackStack; |
| int mPrimaryNavActiveIndex = -1; |
| int mNextFragmentIndex; |
| |
| public FragmentManagerState() { |
| } |
| |
| public FragmentManagerState(Parcel in) { |
| mActive = in.createTypedArray(FragmentState.CREATOR); |
| mAdded = in.createIntArray(); |
| mBackStack = in.createTypedArray(BackStackState.CREATOR); |
| mPrimaryNavActiveIndex = in.readInt(); |
| mNextFragmentIndex = in.readInt(); |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| dest.writeTypedArray(mActive, flags); |
| dest.writeIntArray(mAdded); |
| dest.writeTypedArray(mBackStack, flags); |
| dest.writeInt(mPrimaryNavActiveIndex); |
| dest.writeInt(mNextFragmentIndex); |
| } |
| |
| public static final Parcelable.Creator<FragmentManagerState> CREATOR |
| = new Parcelable.Creator<FragmentManagerState>() { |
| @Override |
| public FragmentManagerState createFromParcel(Parcel in) { |
| return new FragmentManagerState(in); |
| } |
| |
| @Override |
| public FragmentManagerState[] newArray(int size) { |
| return new FragmentManagerState[size]; |
| } |
| }; |
| } |
| |
| /** |
| * Container for fragments associated with an activity. |
| */ |
| final class FragmentManagerImpl extends FragmentManager implements LayoutInflater.Factory2 { |
| static boolean DEBUG = false; |
| static final String TAG = "FragmentManager"; |
| |
| static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; |
| static final String TARGET_STATE_TAG = "android:target_state"; |
| static final String VIEW_STATE_TAG = "android:view_state"; |
| static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; |
| |
| ArrayList<OpGenerator> mPendingActions; |
| boolean mExecutingActions; |
| |
| int mNextFragmentIndex = 0; |
| |
| final ArrayList<Fragment> mAdded = new ArrayList<>(); |
| SparseArray<Fragment> mActive; |
| ArrayList<BackStackRecord> mBackStack; |
| ArrayList<Fragment> mCreatedMenus; |
| |
| // Must be accessed while locked. |
| ArrayList<BackStackRecord> mBackStackIndices; |
| ArrayList<Integer> mAvailBackStackIndices; |
| |
| ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; |
| private final CopyOnWriteArrayList<Pair<FragmentLifecycleCallbacks, Boolean>> |
| mLifecycleCallbacks = new CopyOnWriteArrayList<>(); |
| |
| int mCurState = Fragment.INITIALIZING; |
| FragmentHostCallback mHost; |
| FragmentContainer mContainer; |
| Fragment mParent; |
| Fragment mPrimaryNav; |
| |
| static Field sAnimationListenerField = null; |
| |
| boolean mNeedMenuInvalidate; |
| boolean mStateSaved; |
| boolean mDestroyed; |
| String mNoTransactionsBecause; |
| boolean mHavePendingDeferredStart; |
| |
| // Temporary vars for removing redundant operations in BackStackRecords: |
| ArrayList<BackStackRecord> mTmpRecords; |
| ArrayList<Boolean> mTmpIsPop; |
| ArrayList<Fragment> mTmpAddedFragments; |
| |
| // Temporary vars for state save and restore. |
| Bundle mStateBundle = null; |
| SparseArray<Parcelable> mStateArray = null; |
| |
| // Postponed transactions. |
| ArrayList<StartEnterTransitionListener> mPostponedTransactions; |
| |
| // Saved FragmentManagerNonConfig during saveAllState() and cleared in noteStateNotSaved() |
| FragmentManagerNonConfig mSavedNonConfig; |
| |
| Runnable mExecCommit = new Runnable() { |
| @Override |
| public void run() { |
| execPendingActions(); |
| } |
| }; |
| |
| static boolean modifiesAlpha(AnimationOrAnimator anim) { |
| if (anim.animation instanceof AlphaAnimation) { |
| return true; |
| } else if (anim.animation instanceof AnimationSet) { |
| List<Animation> anims = ((AnimationSet) anim.animation).getAnimations(); |
| for (int i = 0; i < anims.size(); i++) { |
| if (anims.get(i) instanceof AlphaAnimation) { |
| return true; |
| } |
| } |
| return false; |
| } else { |
| return modifiesAlpha(anim.animator); |
| } |
| } |
| |
| static boolean modifiesAlpha(Animator anim) { |
| if (anim == null) { |
| return false; |
| } |
| if (anim instanceof ValueAnimator) { |
| ValueAnimator valueAnim = (ValueAnimator) anim; |
| PropertyValuesHolder[] values = valueAnim.getValues(); |
| for (int i = 0; i < values.length; i++) { |
| if (("alpha").equals(values[i].getPropertyName())) { |
| return true; |
| } |
| } |
| } else if (anim instanceof AnimatorSet) { |
| List<Animator> animList = ((AnimatorSet) anim).getChildAnimations(); |
| for (int i = 0; i < animList.size(); i++) { |
| if (modifiesAlpha(animList.get(i))) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| static boolean shouldRunOnHWLayer(View v, AnimationOrAnimator anim) { |
| if (v == null || anim == null) { |
| return false; |
| } |
| return Build.VERSION.SDK_INT >= 19 |
| && v.getLayerType() == View.LAYER_TYPE_NONE |
| && ViewCompat.hasOverlappingRendering(v) |
| && modifiesAlpha(anim); |
| } |
| |
| private void throwException(RuntimeException ex) { |
| Log.e(TAG, ex.getMessage()); |
| Log.e(TAG, "Activity state:"); |
| LogWriter logw = new LogWriter(TAG); |
| PrintWriter pw = new PrintWriter(logw); |
| if (mHost != null) { |
| try { |
| mHost.onDump(" ", null, pw, new String[] { }); |
| } catch (Exception e) { |
| Log.e(TAG, "Failed dumping state", e); |
| } |
| } else { |
| try { |
| dump(" ", null, pw, new String[] { }); |
| } catch (Exception e) { |
| Log.e(TAG, "Failed dumping state", e); |
| } |
| } |
| throw ex; |
| } |
| |
| @Override |
| public FragmentTransaction beginTransaction() { |
| return new BackStackRecord(this); |
| } |
| |
| @Override |
| public boolean executePendingTransactions() { |
| boolean updates = execPendingActions(); |
| forcePostponedTransactions(); |
| return updates; |
| } |
| |
| @Override |
| public void popBackStack() { |
| enqueueAction(new PopBackStackState(null, -1, 0), false); |
| } |
| |
| @Override |
| public boolean popBackStackImmediate() { |
| checkStateLoss(); |
| return popBackStackImmediate(null, -1, 0); |
| } |
| |
| @Override |
| public void popBackStack(final String name, final int flags) { |
| enqueueAction(new PopBackStackState(name, -1, flags), false); |
| } |
| |
| @Override |
| public boolean popBackStackImmediate(String name, int flags) { |
| checkStateLoss(); |
| return popBackStackImmediate(name, -1, flags); |
| } |
| |
| @Override |
| public void popBackStack(final int id, final int flags) { |
| if (id < 0) { |
| throw new IllegalArgumentException("Bad id: " + id); |
| } |
| enqueueAction(new PopBackStackState(null, id, flags), false); |
| } |
| |
| @Override |
| public boolean popBackStackImmediate(int id, int flags) { |
| checkStateLoss(); |
| execPendingActions(); |
| if (id < 0) { |
| throw new IllegalArgumentException("Bad id: " + id); |
| } |
| return popBackStackImmediate(null, id, flags); |
| } |
| |
| /** |
| * Used by all public popBackStackImmediate methods, this executes pending transactions and |
| * returns true if the pop action did anything, regardless of what other pending |
| * transactions did. |
| * |
| * @return true if the pop operation did anything or false otherwise. |
| */ |
| private boolean popBackStackImmediate(String name, int id, int flags) { |
| execPendingActions(); |
| ensureExecReady(true); |
| |
| if (mPrimaryNav != null // We have a primary nav fragment |
| && id < 0 // No valid id (since they're local) |
| && name == null) { // no name to pop to (since they're local) |
| final FragmentManager childManager = mPrimaryNav.peekChildFragmentManager(); |
| if (childManager != null && childManager.popBackStackImmediate()) { |
| // We did something, just not to this specific FragmentManager. Return true. |
| return true; |
| } |
| } |
| |
| boolean executePop = popBackStackState(mTmpRecords, mTmpIsPop, name, id, flags); |
| if (executePop) { |
| mExecutingActions = true; |
| try { |
| removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop); |
| } finally { |
| cleanupExec(); |
| } |
| } |
| |
| doPendingDeferredStart(); |
| burpActive(); |
| return executePop; |
| } |
| |
| @Override |
| public int getBackStackEntryCount() { |
| return mBackStack != null ? mBackStack.size() : 0; |
| } |
| |
| @Override |
| public BackStackEntry getBackStackEntryAt(int index) { |
| return mBackStack.get(index); |
| } |
| |
| @Override |
| public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { |
| if (mBackStackChangeListeners == null) { |
| mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); |
| } |
| mBackStackChangeListeners.add(listener); |
| } |
| |
| @Override |
| public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { |
| if (mBackStackChangeListeners != null) { |
| mBackStackChangeListeners.remove(listener); |
| } |
| } |
| |
| @Override |
| public void putFragment(Bundle bundle, String key, Fragment fragment) { |
| if (fragment.mIndex < 0) { |
| throwException(new IllegalStateException("Fragment " + fragment |
| + " is not currently in the FragmentManager")); |
| } |
| bundle.putInt(key, fragment.mIndex); |
| } |
| |
| @Override |
| public Fragment getFragment(Bundle bundle, String key) { |
| int index = bundle.getInt(key, -1); |
| if (index == -1) { |
| return null; |
| } |
| Fragment f = mActive.get(index); |
| if (f == null) { |
| throwException(new IllegalStateException("Fragment no longer exists for key " |
| + key + ": index " + index)); |
| } |
| return f; |
| } |
| |
| @Override |
| public List<Fragment> getFragments() { |
| if (mAdded.isEmpty()) { |
| return Collections.EMPTY_LIST; |
| } |
| synchronized (mAdded) { |
| return (List<Fragment>) mAdded.clone(); |
| } |
| } |
| |
| /** |
| * This is used by FragmentController to get the Active fragments. |
| * |
| * @return A list of active fragments in the fragment manager, including those that are in the |
| * back stack. |
| */ |
| List<Fragment> getActiveFragments() { |
| if (mActive == null) { |
| return null; |
| } |
| final int count = mActive.size(); |
| ArrayList<Fragment> fragments = new ArrayList<>(count); |
| for (int i = 0; i < count; i++) { |
| fragments.add(mActive.valueAt(i)); |
| } |
| return fragments; |
| } |
| |
| /** |
| * Used by FragmentController to get the number of Active Fragments. |
| * |
| * @return The number of active fragments. |
| */ |
| int getActiveFragmentCount() { |
| if (mActive == null) { |
| return 0; |
| } |
| return mActive.size(); |
| } |
| |
| @Override |
| public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { |
| if (fragment.mIndex < 0) { |
| throwException( new IllegalStateException("Fragment " + fragment |
| + " is not currently in the FragmentManager")); |
| } |
| if (fragment.mState > Fragment.INITIALIZING) { |
| Bundle result = saveFragmentBasicState(fragment); |
| return result != null ? new Fragment.SavedState(result) : null; |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean isDestroyed() { |
| return mDestroyed; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(128); |
| sb.append("FragmentManager{"); |
| sb.append(Integer.toHexString(System.identityHashCode(this))); |
| sb.append(" in "); |
| if (mParent != null) { |
| DebugUtils.buildShortClassTag(mParent, sb); |
| } else { |
| DebugUtils.buildShortClassTag(mHost, sb); |
| } |
| sb.append("}}"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { |
| String innerPrefix = prefix + " "; |
| |
| int N; |
| if (mActive != null) { |
| N = mActive.size(); |
| if (N > 0) { |
| writer.print(prefix); writer.print("Active Fragments in "); |
| writer.print(Integer.toHexString(System.identityHashCode(this))); |
| writer.println(":"); |
| for (int i=0; i<N; i++) { |
| Fragment f = mActive.valueAt(i); |
| writer.print(prefix); writer.print(" #"); writer.print(i); |
| writer.print(": "); writer.println(f); |
| if (f != null) { |
| f.dump(innerPrefix, fd, writer, args); |
| } |
| } |
| } |
| } |
| |
| N = mAdded.size(); |
| if (N > 0) { |
| writer.print(prefix); writer.println("Added Fragments:"); |
| for (int i = 0; i < N; i++) { |
| Fragment f = mAdded.get(i); |
| writer.print(prefix); |
| writer.print(" #"); |
| writer.print(i); |
| writer.print(": "); |
| writer.println(f.toString()); |
| } |
| } |
| |
| if (mCreatedMenus != null) { |
| N = mCreatedMenus.size(); |
| if (N > 0) { |
| writer.print(prefix); writer.println("Fragments Created Menus:"); |
| for (int i=0; i<N; i++) { |
| Fragment f = mCreatedMenus.get(i); |
| writer.print(prefix); writer.print(" #"); writer.print(i); |
| writer.print(": "); writer.println(f.toString()); |
| } |
| } |
| } |
| |
| if (mBackStack != null) { |
| N = mBackStack.size(); |
| if (N > 0) { |
| writer.print(prefix); writer.println("Back Stack:"); |
| for (int i=0; i<N; i++) { |
| BackStackRecord bs = mBackStack.get(i); |
| writer.print(prefix); writer.print(" #"); writer.print(i); |
| writer.print(": "); writer.println(bs.toString()); |
| bs.dump(innerPrefix, fd, writer, args); |
| } |
| } |
| } |
| |
| synchronized (this) { |
| if (mBackStackIndices != null) { |
| N = mBackStackIndices.size(); |
| if (N > 0) { |
| writer.print(prefix); writer.println("Back Stack Indices:"); |
| for (int i=0; i<N; i++) { |
| BackStackRecord bs = mBackStackIndices.get(i); |
| writer.print(prefix); writer.print(" #"); writer.print(i); |
| writer.print(": "); writer.println(bs); |
| } |
| } |
| } |
| |
| if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { |
| writer.print(prefix); writer.print("mAvailBackStackIndices: "); |
| 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(" mDestroyed="); writer.println(mDestroyed); |
| if (mNeedMenuInvalidate) { |
| writer.print(prefix); writer.print(" mNeedMenuInvalidate="); |
| writer.println(mNeedMenuInvalidate); |
| } |
| if (mNoTransactionsBecause != null) { |
| writer.print(prefix); writer.print(" mNoTransactionsBecause="); |
| writer.println(mNoTransactionsBecause); |
| } |
| } |
| |
| static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); |
| static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); |
| static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); |
| static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); |
| |
| static final int ANIM_DUR = 220; |
| |
| static AnimationOrAnimator makeOpenCloseAnimation(Context context, 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(Context context, 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(); |
| 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 (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(mHost.getContext(), 1.125f, 1.0f, 0, 1); |
| case ANIM_STYLE_OPEN_EXIT: |
| return makeOpenCloseAnimation(mHost.getContext(), 1.0f, .975f, 1, 0); |
| case ANIM_STYLE_CLOSE_ENTER: |
| return makeOpenCloseAnimation(mHost.getContext(), .975f, 1.0f, 0, 1); |
| case ANIM_STYLE_CLOSE_EXIT: |
| return makeOpenCloseAnimation(mHost.getContext(), 1.0f, 1.075f, 1, 0); |
| case ANIM_STYLE_FADE_ENTER: |
| return makeFadeAnimation(mHost.getContext(), 0, 1); |
| case ANIM_STYLE_FADE_EXIT: |
| return makeFadeAnimation(mHost.getContext(), 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); |
| } |
| } |
| |
| /** |
| * Sets the to be animated view on hardware layer during the animation. Note |
| * that calling this will replace any existing animation listener on the animation |
| * with a new one, as animations do not support more than one listeners. Therefore, |
| * animations that already have listeners should do the layer change operations |
| * in their existing listeners, rather than calling this function. |
| */ |
| private static void setHWLayerAnimListenerIfAlpha(final View v, AnimationOrAnimator anim) { |
| if (v == null || anim == null) { |
| return; |
| } |
| if (shouldRunOnHWLayer(v, anim)) { |
| if (anim.animator != null) { |
| anim.animator.addListener(new AnimatorOnHWLayerIfNeededListener(v)); |
| } else { |
| AnimationListener originalListener = getAnimationListener(anim.animation); |
| // If there's already a listener set on the animation, we need wrap the new listener |
| // around the existing listener, so that they will both get animation listener |
| // callbacks. |
| v.setLayerType(View.LAYER_TYPE_HARDWARE, null); |
| anim.animation.setAnimationListener(new AnimateOnHWLayerIfNeededListener(v, |
| originalListener)); |
| } |
| } |
| } |
| |
| /** |
| * Returns an existing AnimationListener on an Animation or {@code null} if none exists. |
| */ |
| private static AnimationListener getAnimationListener(Animation animation) { |
| AnimationListener originalListener = null; |
| try { |
| if (sAnimationListenerField == null) { |
| sAnimationListenerField = Animation.class.getDeclaredField("mListener"); |
| sAnimationListenerField.setAccessible(true); |
| } |
| originalListener = (AnimationListener) sAnimationListenerField.get(animation); |
| } catch (NoSuchFieldException e) { |
| Log.e(TAG, "No field with the name mListener is found in Animation class", e); |
| } catch (IllegalAccessException e) { |
| Log.e(TAG, "Cannot access Animation's mListener field", e); |
| } |
| return originalListener; |
| } |
| |
| 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.STOPPED) { |
| newState = Fragment.STOPPED; |
| } |
| 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); |
| f.mTarget = getFragment(f.mSavedFragmentState, |
| FragmentManagerImpl.TARGET_STATE_TAG); |
| if (f.mTarget != null) { |
| f.mTargetRequestCode = f.mSavedFragmentState.getInt( |
| FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); |
| } |
| f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( |
| FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); |
| if (!f.mUserVisibleHint) { |
| f.mDeferStart = true; |
| if (newState > Fragment.STOPPED) { |
| newState = Fragment.STOPPED; |
| } |
| } |
| } |
| |
| f.mHost = mHost; |
| f.mParentFragment = mParent; |
| f.mFragmentManager = mParent != null |
| ? mParent.mChildFragmentManager : mHost.getFragmentManagerImpl(); |
| |
| // 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.mIndex) != 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); |
| } |
| } |
| |
| dispatchOnFragmentPreAttached(f, mHost.getContext(), false); |
| f.mCalled = false; |
| f.onAttach(mHost.getContext()); |
| if (!f.mCalled) { |
| throw new SuperNotCalledException("Fragment " + f |
| + " did not call through to super.onAttach()"); |
| } |
| 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; |
| } |
| f.mRetaining = false; |
| } |
| // fall through |
| case Fragment.CREATED: |
| // This is outside the if statement below on purpose; we want this to run |
| // even if we do a moveToState from CREATED => *, CREATED => CREATED, and |
| // * => CREATED as part of the case fallthrough above. |
| 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 (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.mView = 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) { |
| f.mState = Fragment.STOPPED; |
| } |
| // fall through |
| case Fragment.STOPPED: |
| if (newState > Fragment.STOPPED) { |
| 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.STOPPED: |
| if (newState < Fragment.STOPPED) { |
| if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); |
| f.performReallyStop(); |
| } |
| // 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.mView.clearAnimation(); |
| f.mContainer.endViewTransition(f.mView); |
| AnimationOrAnimator anim = null; |
| 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; |
| 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); |
| if (!f.mRetaining) { |
| f.performDestroy(); |
| dispatchOnFragmentDestroyed(f, false); |
| } else { |
| f.mState = Fragment.INITIALIZING; |
| } |
| |
| f.performDetach(); |
| dispatchOnFragmentDetached(f, false); |
| if (!keepActive) { |
| if (!f.mRetaining) { |
| makeInactive(f); |
| } else { |
| f.mHost = null; |
| f.mParentFragment = null; |
| f.mFragmentManager = null; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| 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 = anim.animation; |
| fragment.setAnimatingAway(fragment.mView); |
| AnimationListener listener = getAnimationListener(animation); |
| animation.setAnimationListener(new AnimationListenerWrapper(listener) { |
| @Override |
| public void onAnimationEnd(Animation animation) { |
| super.onAnimationEnd(animation); |
| container.endViewTransition(viewToAnimate); |
| |
| if (fragment.getAnimatingAway() != null) { |
| fragment.setAnimatingAway(null); |
| moveToState(fragment, fragment.getStateAfterAnimating(), 0, 0, false); |
| } |
| } |
| }); |
| setHWLayerAnimListenerIfAlpha(viewToAnimate, anim); |
| 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); |
| setHWLayerAnimListenerIfAlpha(fragment.mView, anim); |
| animator.start(); |
| } |
| } |
| |
| void moveToState(Fragment f) { |
| moveToState(f, mCurState, 0, 0, false); |
| } |
| |
| void ensureInflatedFragmentView(Fragment f) { |
| if (f.mFromLayout && !f.mPerformedCreateView) { |
| f.mView = 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.mView.setVisibility(View.GONE); |
| } |
| } |
| }); |
| } |
| } else { |
| fragment.mView.setVisibility(View.VISIBLE); |
| } |
| setHWLayerAnimListenerIfAlpha(fragment.mView, anim); |
| anim.animator.start(); |
| } else { |
| if (anim != null) { |
| setHWLayerAnimListenerIfAlpha(fragment.mView, anim); |
| 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 && fragment.mHasMenu && fragment.mMenuVisible) { |
| 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; |
| } |
| 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) { |
| setHWLayerAnimListenerIfAlpha(f.mView, anim); |
| 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; |
| |
| if (mActive != null) { |
| boolean loadersRunning = false; |
| |
| // 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); |
| if (f.mLoaderManager != null) { |
| loadersRunning |= f.mLoaderManager.hasRunningLoaders(); |
| } |
| } |
| |
| // Now iterate through all active fragments. These will include those that are removed |
| // and detached. |
| final int numActive = mActive.size(); |
| for (int i = 0; i < numActive; i++) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null && (f.mRemoving || f.mDetached) && !f.mIsNewlyAdded) { |
| moveFragmentToExpectedState(f); |
| if (f.mLoaderManager != null) { |
| loadersRunning |= f.mLoaderManager.hasRunningLoaders(); |
| } |
| } |
| } |
| |
| if (!loadersRunning) { |
| startPendingDeferredFragments(); |
| } |
| |
| if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) { |
| mHost.onSupportInvalidateOptionsMenu(); |
| mNeedMenuInvalidate = false; |
| } |
| } |
| } |
| |
| void startPendingDeferredFragments() { |
| if (mActive == null) return; |
| |
| for (int i=0; i<mActive.size(); i++) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null) { |
| performPendingDeferredStart(f); |
| } |
| } |
| } |
| |
| void makeActive(Fragment f) { |
| if (f.mIndex >= 0) { |
| return; |
| } |
| |
| f.setIndex(mNextFragmentIndex++, mParent); |
| if (mActive == null) { |
| mActive = new SparseArray<>(); |
| } |
| mActive.put(f.mIndex, f); |
| if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); |
| } |
| |
| void makeInactive(Fragment f) { |
| if (f.mIndex < 0) { |
| return; |
| } |
| |
| if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); |
| // Don't remove yet. That happens in burpActive(). This prevents |
| // concurrent modification while iterating over mActive |
| mActive.put(f.mIndex, null); |
| |
| mHost.inactivateFragment(f.mWho); |
| 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 (fragment.mHasMenu && fragment.mMenuVisible) { |
| 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 (fragment.mHasMenu && fragment.mMenuVisible) { |
| 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 (fragment.mHasMenu && fragment.mMenuVisible) { |
| 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 (fragment.mHasMenu && fragment.mMenuVisible) { |
| mNeedMenuInvalidate = true; |
| } |
| } |
| } |
| } |
| |
| @Override |
| 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; |
| } |
| } |
| if (mActive != null) { |
| // Now for any known fragment. |
| for (int i=mActive.size()-1; i>=0; i--) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null && f.mFragmentId == id) { |
| return f; |
| } |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public Fragment findFragmentByTag(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 (mActive != null && tag != null) { |
| // Now for any known fragment. |
| for (int i=mActive.size()-1; i>=0; i--) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null && tag.equals(f.mTag)) { |
| return f; |
| } |
| } |
| } |
| return null; |
| } |
| |
| public Fragment findFragmentByWho(String who) { |
| if (mActive != null && who != null) { |
| for (int i=mActive.size()-1; i>=0; i--) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null && (f=f.findFragmentByWho(who)) != null) { |
| return f; |
| } |
| } |
| } |
| return null; |
| } |
| |
| private void checkStateLoss() { |
| if (mStateSaved) { |
| throw new IllegalStateException( |
| "Can not perform this action after onSaveInstanceState"); |
| } |
| if (mNoTransactionsBecause != null) { |
| throw new IllegalStateException( |
| "Can not perform this action inside of " + mNoTransactionsBecause); |
| } |
| } |
| |
| @Override |
| public boolean isStateSaved() { |
| return mStateSaved; |
| } |
| |
| /** |
| * 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()} |
| */ |
| private 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); |
| } |
| } |
| } |
| |
| 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 (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(); |
| } |
| } |
| |
| 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; |
| } |
| |
| 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)) { |
| 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.getView(); |
| 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. |
| */ |
| private 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); |
| } |
| |
| if (mActive != null) { |
| final int numActive = mActive.size(); |
| for (int i = 0; i < numActive; i++) { |
| // Allow added fragments to be removed during the pop since we aren't going |
| // to move them to the final state with moveToState(mCurState). |
| Fragment fragment = mActive.valueAt(i); |
| 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() { |
| final int numFragments = mActive == null ? 0 : mActive.size(); |
| for (int i = 0; i < numFragments; i++) { |
| Fragment fragment = mActive.valueAt(i); |
| 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) { |
| boolean loadersRunning = false; |
| for (int i = 0; i < mActive.size(); i++) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null && f.mLoaderManager != null) { |
| loadersRunning |= f.mLoaderManager.hasRunningLoaders(); |
| } |
| } |
| if (!loadersRunning) { |
| 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; |
| } |
| |
| FragmentManagerNonConfig retainNonConfig() { |
| setRetaining(mSavedNonConfig); |
| return mSavedNonConfig; |
| } |
| |
| /** |
| * Recurse the FragmentManagerNonConfig fragments and set the mRetaining to true. This |
| * was previously done while saving the non-config state, but that has been moved to |
| * {@link #saveNonConfig()} called from {@link #saveAllState()}. If mRetaining is set too |
| * early, the fragment won't be destroyed when the FragmentManager is destroyed. |
| */ |
| private static void setRetaining(FragmentManagerNonConfig nonConfig) { |
| if (nonConfig == null) { |
| return; |
| } |
| List<Fragment> fragments = nonConfig.getFragments(); |
| if (fragments != null) { |
| for (Fragment fragment : fragments) { |
| fragment.mRetaining = true; |
| } |
| } |
| List<FragmentManagerNonConfig> children = nonConfig.getChildNonConfigs(); |
| if (children != null) { |
| for (FragmentManagerNonConfig child : children) { |
| setRetaining(child); |
| } |
| } |
| } |
| |
| void saveNonConfig() { |
| ArrayList<Fragment> fragments = null; |
| ArrayList<FragmentManagerNonConfig> childFragments = null; |
| if (mActive != null) { |
| for (int i=0; i<mActive.size(); i++) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null) { |
| if (f.mRetainInstance) { |
| if (fragments == null) { |
| fragments = new ArrayList<Fragment>(); |
| } |
| fragments.add(f); |
| f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; |
| if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); |
| } |
| FragmentManagerNonConfig child; |
| if (f.mChildFragmentManager != null) { |
| f.mChildFragmentManager.saveNonConfig(); |
| child = f.mChildFragmentManager.mSavedNonConfig; |
| } else { |
| // f.mChildNonConfig may be not null, when the parent fragment is |
| // in the backstack. |
| child = f.mChildNonConfig; |
| } |
| |
| if (childFragments == null && child != null) { |
| childFragments = new ArrayList<>(mActive.size()); |
| for (int j = 0; j < i; j++) { |
| childFragments.add(null); |
| } |
| } |
| |
| if (childFragments != null) { |
| childFragments.add(child); |
| } |
| } |
| } |
| } |
| if (fragments == null && childFragments == null) { |
| mSavedNonConfig = null; |
| } else { |
| mSavedNonConfig = new FragmentManagerNonConfig(fragments, childFragments); |
| } |
| } |
| |
| 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; |
| mSavedNonConfig = null; |
| |
| if (mActive == null || mActive.size() <= 0) { |
| return null; |
| } |
| |
| // First collect all active fragments. |
| int N = mActive.size(); |
| FragmentState[] active = new FragmentState[N]; |
| boolean haveFragments = false; |
| for (int i=0; i<N; i++) { |
| Fragment f = mActive.valueAt(i); |
| if (f != null) { |
| if (f.mIndex < 0) { |
| throwException(new IllegalStateException( |
| "Failure saving state: active " + f |
| + " has cleared index: " + f.mIndex)); |
| } |
| |
| haveFragments = true; |
| |
| FragmentState fs = new FragmentState(f); |
| active[i] = fs; |
| |
| if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { |
| fs.mSavedFragmentState = saveFragmentBasicState(f); |
| |
| if (f.mTarget != null) { |
| if (f.mTarget.mIndex < 0) { |
| throwException(new IllegalStateException( |
| "Failure saving state: " + f |
| + " has target not in fragment manager: " + f.mTarget)); |
| } |
| if (fs.mSavedFragmentState == null) { |
| fs.mSavedFragmentState = new Bundle(); |
| } |
| putFragment(fs.mSavedFragmentState, |
| FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); |
| 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; |
| } |
| |
| int[] added = null; |
| BackStackState[] backStack = null; |
| |
| // Build list of currently added fragments. |
| N = mAdded.size(); |
| if (N > 0) { |
| added = new int[N]; |
| for (int i = 0; i < N; i++) { |
| added[i] = mAdded.get(i).mIndex; |
| if (added[i] < 0) { |
| throwException(new IllegalStateException( |
| "Failure saving state: active " + mAdded.get(i) |
| + " has cleared index: " + added[i])); |
| } |
| if (DEBUG) { |
| Log.v(TAG, "saveAllState: adding fragment #" + i |
| + ": " + mAdded.get(i)); |
| } |
| } |
| } |
| |
| // Now save back stack. |
| if (mBackStack != null) { |
| N = mBackStack.size(); |
| if (N > 0) { |
| backStack = new BackStackState[N]; |
| for (int i=0; i<N; 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.mPrimaryNavActiveIndex = mPrimaryNav.mIndex; |
| } |
| fms.mNextFragmentIndex = mNextFragmentIndex; |
| saveNonConfig(); |
| return fms; |
| } |
| |
| void restoreAllState(Parcelable state, FragmentManagerNonConfig nonConfig) { |
| // If there is no saved state at all, then there can not be |
| // any nonConfig fragments either, so that is that. |
| if (state == null) return; |
| FragmentManagerState fms = (FragmentManagerState)state; |
| if (fms.mActive == null) return; |
| |
| List<FragmentManagerNonConfig> childNonConfigs = null; |
| |
| // First re-attach any non-config instances we are retaining back |
| // to their saved state, so we don't try to instantiate them again. |
| if (nonConfig != null) { |
| List<Fragment> nonConfigFragments = nonConfig.getFragments(); |
| childNonConfigs = nonConfig.getChildNonConfigs(); |
| final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; |
| for (int i = 0; i < count; i++) { |
| Fragment f = nonConfigFragments.get(i); |
| if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); |
| int index = 0; // index into fms.mActive |
| while (index < fms.mActive.length && fms.mActive[index].mIndex != f.mIndex) { |
| index++; |
| } |
| if (index == fms.mActive.length) { |
| throwException(new IllegalStateException("Could not find active fragment " |
| + "with index " + f.mIndex)); |
| } |
| FragmentState fs = fms.mActive[index]; |
| fs.mInstance = f; |
| f.mSavedViewState = null; |
| f.mBackStackNesting = 0; |
| f.mInLayout = false; |
| f.mAdded = false; |
| 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 = new SparseArray<>(fms.mActive.length); |
| for (int i=0; i<fms.mActive.length; i++) { |
| FragmentState fs = fms.mActive[i]; |
| if (fs != null) { |
| FragmentManagerNonConfig childNonConfig = null; |
| if (childNonConfigs != null && i < childNonConfigs.size()) { |
| childNonConfig = childNonConfigs.get(i); |
| } |
| Fragment f = fs.instantiate(mHost, mContainer, mParent, childNonConfig); |
| if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); |
| mActive.put(f.mIndex, 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; |
| } |
| } |
| |
| // Update the target of all retained fragments. |
| if (nonConfig != null) { |
| List<Fragment> nonConfigFragments = nonConfig.getFragments(); |
| final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; |
| for (int i = 0; i < count; i++) { |
| Fragment f = nonConfigFragments.get(i); |
| if (f.mTargetIndex >= 0) { |
| f.mTarget = mActive.get(f.mTargetIndex); |
| if (f.mTarget == null) { |
| Log.w(TAG, "Re-attaching retained fragment " + f |
| + " target no longer exists: " + f.mTargetIndex); |
| } |
| } |
| } |
| } |
| |
| // Build the list of currently added fragments. |
| mAdded.clear(); |
| if (fms.mAdded != null) { |
| for (int i=0; i<fms.mAdded.length; i++) { |
| Fragment f = mActive.get(fms.mAdded[i]); |
| if (f == null) { |
| throwException(new IllegalStateException( |
| "No instantiated fragment for index #" + fms.mAdded[i])); |
| } |
| f.mAdded = true; |
| if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); |
| if (mAdded.contains(f)) { |
| throw new IllegalStateException("Already added!"); |
| } |
| 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.mPrimaryNavActiveIndex >= 0) { |
| mPrimaryNav = mActive.get(fms.mPrimaryNavActiveIndex); |
| } |
| 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() { |
| if (mActive != null) { |
| for (int i = mActive.size() - 1; i >= 0; i--) { |
| if (mActive.valueAt(i) == null) { |
| mActive.delete(mActive.keyAt(i)); |
| } |
| } |
| } |
| } |
| |
| public void attachController(FragmentHostCallback host, |
| FragmentContainer container, Fragment parent) { |
| if (mHost != null) throw new IllegalStateException("Already attached"); |
| mHost = host; |
| mContainer = container; |
| mParent = parent; |
| } |
| |
| public void noteStateNotSaved() { |
| mSavedNonConfig = null; |
| mStateSaved = 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; |
| dispatchStateChange(Fragment.CREATED); |
| } |
| |
| public void dispatchActivityCreated() { |
| mStateSaved = false; |
| dispatchStateChange(Fragment.ACTIVITY_CREATED); |
| } |
| |
| public void dispatchStart() { |
| mStateSaved = false; |
| dispatchStateChange(Fragment.STARTED); |
| } |
| |
| public void dispatchResume() { |
| mStateSaved = false; |
| dispatchStateChange(Fragment.RESUMED); |
| } |
| |
| public void dispatchPause() { |
| dispatchStateChange(Fragment.STARTED); |
| } |
| |
| public void dispatchStop() { |
| // See saveAllState() for the explanation of this. We do this for |
| // all platform versions, to keep our behavior more consistent between |
| // them. |
| mStateSaved = true; |
| |
| dispatchStateChange(Fragment.STOPPED); |
| } |
| |
| public void dispatchReallyStop() { |
| 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; |
| } |
| |
| 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 android.support.v4.app.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 android.support.v4.app.Fragment f = mAdded.get(i); |
| if (f != null) { |
| f.performPictureInPictureModeChanged(isInPictureInPictureMode); |
| } |
| } |
| } |
| |
| public void dispatchConfigurationChanged(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(Menu menu, 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(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(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(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(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.mIndex) != f |
| || (f.mHost != null && f.getFragmentManager() != this))) { |
| throw new IllegalArgumentException("Fragment " + f |
| + " is not an active fragment of FragmentManager " + this); |
| } |
| mPrimaryNav = f; |
| } |
| |
| @Override |
| public Fragment getPrimaryNavigationFragment() { |
| return mPrimaryNav; |
| } |
| |
| @Override |
| public void registerFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb, |
| boolean recursive) { |
| mLifecycleCallbacks.add(new Pair<>(cb, recursive)); |
| } |
| |
| @Override |
| public void unregisterFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb) { |
| synchronized (mLifecycleCallbacks) { |
| for (int i = 0, N = mLifecycleCallbacks.size(); i < N; i++) { |
| if (mLifecycleCallbacks.get(i).first == cb) { |
| mLifecycleCallbacks.remove(i); |
| break; |
| } |
| } |
| } |
| } |
| |
| void dispatchOnFragmentPreAttached(Fragment f, Context context, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentPreAttached(f, context, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentPreAttached(this, f, context); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentAttached(Fragment f, Context context, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentAttached(f, context, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentAttached(this, f, context); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentPreCreated(Fragment f, Bundle savedInstanceState, |
| boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentPreCreated(f, savedInstanceState, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentPreCreated(this, f, savedInstanceState); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentCreated(Fragment f, Bundle savedInstanceState, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentCreated(f, savedInstanceState, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentCreated(this, f, savedInstanceState); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentActivityCreated(Fragment f, Bundle savedInstanceState, |
| boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentActivityCreated(f, savedInstanceState, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentActivityCreated(this, f, savedInstanceState); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentViewCreated(Fragment f, View v, Bundle savedInstanceState, |
| boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentViewCreated(f, v, savedInstanceState, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentViewCreated(this, f, v, savedInstanceState); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentStarted(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentStarted(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentStarted(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentResumed(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentResumed(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentResumed(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentPaused(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentPaused(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentPaused(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentStopped(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentStopped(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentStopped(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentSaveInstanceState(Fragment f, Bundle outState, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentSaveInstanceState(f, outState, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentSaveInstanceState(this, f, outState); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentViewDestroyed(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentViewDestroyed(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentViewDestroyed(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentDestroyed(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentDestroyed(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentDestroyed(this, f); |
| } |
| } |
| } |
| |
| void dispatchOnFragmentDetached(Fragment f, boolean onlyRecursive) { |
| if (mParent != null) { |
| FragmentManager parentManager = mParent.getFragmentManager(); |
| if (parentManager instanceof FragmentManagerImpl) { |
| ((FragmentManagerImpl) parentManager) |
| .dispatchOnFragmentDetached(f, true); |
| } |
| } |
| for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { |
| if (!onlyRecursive || p.second) { |
| p.first.onFragmentDetached(this, f); |
| } |
| } |
| } |
| |
| 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 |
| public View onCreateView(View parent, String name, Context context, 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 (!Fragment.isSupportFragmentClass(mHost.getContext(), 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 = mContainer.instantiate(context, fname, null); |
| 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; |
| // If this fragment is newly instantiated (either right now, or |
| // from last saved state), then give it the attributes to |
| // initialize itself. |
| if (!fragment.mRetaining) { |
| 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) { |
| 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; |
| } |
| |
| /** |
| * 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.peekChildFragmentManager(); |
| if (childManager != null && 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 { |
| private final boolean mIsBack; |
| private 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; |
| |
| private AnimationOrAnimator(Animation animation) { |
| this.animation = animation; |
| this.animator = null; |
| if (animation == null) { |
| throw new IllegalStateException("Animation cannot be null"); |
| } |
| } |
| |
| private AnimationOrAnimator(Animator animator) { |
| this.animation = null; |
| this.animator = animator; |
| if (animator == null) { |
| throw new IllegalStateException("Animator cannot be null"); |
| } |
| } |
| } |
| |
| /** |
| * Wrap an AnimationListener that can be null. This allows us to chain animation listeners. |
| */ |
| private static class AnimationListenerWrapper implements AnimationListener { |
| private final AnimationListener mWrapped; |
| |
| private AnimationListenerWrapper(AnimationListener wrapped) { |
| mWrapped = wrapped; |
| } |
| |
| @CallSuper |
| @Override |
| public void onAnimationStart(Animation animation) { |
| if (mWrapped != null) { |
| mWrapped.onAnimationStart(animation); |
| } |
| } |
| |
| @CallSuper |
| @Override |
| public void onAnimationEnd(Animation animation) { |
| if (mWrapped != null) { |
| mWrapped.onAnimationEnd(animation); |
| } |
| } |
| |
| @CallSuper |
| @Override |
| public void onAnimationRepeat(Animation animation) { |
| if (mWrapped != null) { |
| mWrapped.onAnimationRepeat(animation); |
| } |
| } |
| } |
| |
| /** |
| * Reset the layer type to LAYER_TYPE_NONE at the end of an animation. |
| */ |
| private static class AnimateOnHWLayerIfNeededListener extends AnimationListenerWrapper { |
| View mView; |
| |
| AnimateOnHWLayerIfNeededListener(final View v, AnimationListener listener) { |
| super(listener); |
| mView = v; |
| } |
| |
| @Override |
| @CallSuper |
| public void onAnimationEnd(Animation animation) { |
| // If we're attached to a window, assume we're in the normal performTraversals |
| // drawing path for Animations running. It's not safe to change the layer type |
| // during drawing, so post it to the View to run later. If we're not attached |
| // or we're running on N and above, post it to the view. If we're not on N and |
| // not attached, do it right now since existing platform versions don't run the |
| // hwui renderer for detached views off the UI thread making changing layer type |
| // safe, but posting may not be. |
| // Prior to N posting to a detached view from a non-Looper thread could cause |
| // leaks, since the thread-local run queue on a non-Looper thread would never |
| // be flushed. |
| if (ViewCompat.isAttachedToWindow(mView) || Build.VERSION.SDK_INT >= 24) { |
| mView.post(new Runnable() { |
| @Override |
| public void run() { |
| mView.setLayerType(View.LAYER_TYPE_NONE, null); |
| } |
| }); |
| } else { |
| mView.setLayerType(View.LAYER_TYPE_NONE, null); |
| } |
| super.onAnimationEnd(animation); |
| } |
| } |
| |
| /** |
| * Set the layer type to LAYER_TYPE_HARDWARE while an animator is running. |
| */ |
| private static class AnimatorOnHWLayerIfNeededListener extends AnimatorListenerAdapter { |
| View mView; |
| |
| AnimatorOnHWLayerIfNeededListener(final View v) { |
| mView = v; |
| } |
| |
| @Override |
| public void onAnimationStart(Animator animation) { |
| mView.setLayerType(View.LAYER_TYPE_HARDWARE, null); |
| } |
| |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| mView.setLayerType(View.LAYER_TYPE_NONE, null); |
| animation.removeListener(this); |
| } |
| } |
| } |