| /* |
| * Copyright 2018 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 androidx.fragment.app; |
| |
| import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; |
| |
| import android.animation.Animator; |
| import android.annotation.SuppressLint; |
| import android.app.Activity; |
| import android.content.ComponentCallbacks; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentSender; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.os.Build; |
| import android.os.Bundle; |
| import android.os.Looper; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.AttributeSet; |
| import android.util.SparseArray; |
| import android.view.ContextMenu; |
| import android.view.ContextMenu.ContextMenuInfo; |
| import android.view.LayoutInflater; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.view.View.OnCreateContextMenuListener; |
| import android.view.ViewGroup; |
| import android.view.animation.Animation; |
| import android.widget.AdapterView; |
| |
| import androidx.annotation.CallSuper; |
| import androidx.annotation.ContentView; |
| import androidx.annotation.MainThread; |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import androidx.annotation.RestrictTo; |
| import androidx.annotation.StringRes; |
| import androidx.core.app.SharedElementCallback; |
| import androidx.core.util.DebugUtils; |
| import androidx.core.view.LayoutInflaterCompat; |
| import androidx.lifecycle.GenericLifecycleObserver; |
| import androidx.lifecycle.Lifecycle; |
| import androidx.lifecycle.LifecycleOwner; |
| import androidx.lifecycle.LifecycleRegistry; |
| import androidx.lifecycle.LiveData; |
| import androidx.lifecycle.MutableLiveData; |
| import androidx.lifecycle.ViewModelStore; |
| import androidx.lifecycle.ViewModelStoreOwner; |
| import androidx.loader.app.LoaderManager; |
| import androidx.savedstate.SavedStateRegistry; |
| import androidx.savedstate.SavedStateRegistryController; |
| import androidx.savedstate.SavedStateRegistryOwner; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.lang.reflect.InvocationTargetException; |
| import java.util.HashMap; |
| import java.util.UUID; |
| |
| /** |
| * Static library support version of the framework's {@link android.app.Fragment}. |
| * 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 android.app.Fragment} |
| * documentation for a class overview. |
| * |
| * <p>The main differences when using this support version instead of the framework version are: |
| * <ul> |
| * <li>Your activity must extend {@link FragmentActivity} |
| * <li>You must call {@link FragmentActivity#getSupportFragmentManager} to get the |
| * {@link FragmentManager} |
| * </ul> |
| * |
| */ |
| public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener, LifecycleOwner, |
| ViewModelStoreOwner, SavedStateRegistryOwner { |
| |
| static final Object USE_DEFAULT_TRANSITION = new Object(); |
| |
| static final int INITIALIZING = 0; // Not yet created. |
| static final int CREATED = 1; // Created. |
| static final int ACTIVITY_CREATED = 2; // Fully created, not started. |
| static final int STARTED = 3; // Created and started, not resumed. |
| static final int RESUMED = 4; // Created started and resumed. |
| |
| int mState = INITIALIZING; |
| |
| // When instantiated from saved state, this is the saved state. |
| Bundle mSavedFragmentState; |
| SparseArray<Parcelable> mSavedViewState; |
| // If the userVisibleHint is changed before the state is set, |
| // it is stored here |
| @Nullable Boolean mSavedUserVisibleHint; |
| |
| // Internal unique name for this fragment; |
| @NonNull |
| String mWho = UUID.randomUUID().toString(); |
| |
| // Construction arguments; |
| Bundle mArguments; |
| |
| // Target fragment. |
| Fragment mTarget; |
| |
| // For use when retaining a fragment: this is the who of the last mTarget. |
| String mTargetWho = null; |
| |
| // Target request code. |
| int mTargetRequestCode; |
| |
| // True if the fragment is in the list of added fragments. |
| boolean mAdded; |
| |
| // If set this fragment is being removed from its activity. |
| boolean mRemoving; |
| |
| // Set to true if this fragment was instantiated from a layout file. |
| boolean mFromLayout; |
| |
| // Set to true when the view has actually been inflated in its layout. |
| boolean mInLayout; |
| |
| // True if this fragment has been restored from previously saved state. |
| boolean mRestored; |
| |
| // True if performCreateView has been called and a matching call to performDestroyView |
| // has not yet happened. |
| boolean mPerformedCreateView; |
| |
| // Number of active back stack entries this fragment is in. |
| int mBackStackNesting; |
| |
| // The fragment manager we are associated with. Set as soon as the |
| // fragment is used in a transaction; cleared after it has been removed |
| // from all transactions. |
| FragmentManagerImpl mFragmentManager; |
| |
| // Host this fragment is attached to. |
| FragmentHostCallback mHost; |
| |
| // Private fragment manager for child fragments inside of this one. |
| FragmentManagerImpl mChildFragmentManager; |
| |
| // If this Fragment is contained in another Fragment, this is that container. |
| Fragment mParentFragment; |
| |
| // The optional identifier for this fragment -- either the container ID if it |
| // was dynamically added to the view hierarchy, or the ID supplied in |
| // layout. |
| int mFragmentId; |
| |
| // When a fragment is being dynamically added to the view hierarchy, this |
| // is the identifier of the parent container it is being added to. |
| int mContainerId; |
| |
| // The optional named tag for this fragment -- usually used to find |
| // fragments that are not part of the layout. |
| String mTag; |
| |
| // Set to true when the app has requested that this fragment be hidden |
| // from the user. |
| boolean mHidden; |
| |
| // Set to true when the app has requested that this fragment be deactivated. |
| boolean mDetached; |
| |
| // If set this fragment would like its instance retained across |
| // configuration changes. |
| boolean mRetainInstance; |
| |
| // If set this fragment changed its mRetainInstance while it was detached |
| boolean mRetainInstanceChangedWhileDetached; |
| |
| // If set this fragment has menu items to contribute. |
| boolean mHasMenu; |
| |
| // Set to true to allow the fragment's menu to be shown. |
| boolean mMenuVisible = true; |
| |
| // Used to verify that subclasses call through to super class. |
| boolean mCalled; |
| |
| // The parent container of the fragment after dynamically added to UI. |
| ViewGroup mContainer; |
| |
| // The View generated for this fragment. |
| View mView; |
| |
| // The real inner view that will save/restore state. |
| View mInnerView; |
| |
| // Whether this fragment should defer starting until after other fragments |
| // have been started and their loaders are finished. |
| boolean mDeferStart; |
| |
| // Hint provided by the app that this fragment is currently visible to the user. |
| boolean mUserVisibleHint = true; |
| |
| // The animation and transition information for the fragment. This will be null |
| // unless the elements are explicitly accessed and should remain null for Fragments |
| // without Views. |
| AnimationInfo mAnimationInfo; |
| |
| // True if the View was added, and its animation has yet to be run. This could |
| // also indicate that the fragment view hasn't been made visible, even if there is no |
| // animation for this fragment. |
| boolean mIsNewlyAdded; |
| |
| // True if mHidden has been changed and the animation should be scheduled. |
| boolean mHiddenChanged; |
| |
| // The alpha of the view when the view was added and then postponed. If the value is less |
| // than zero, this means that the view's add was canceled and should not participate in |
| // removal animations. |
| float mPostponedAlpha; |
| |
| // The cached value from onGetLayoutInflater(Bundle) that will be returned from |
| // getLayoutInflater() |
| LayoutInflater mLayoutInflater; |
| |
| // Keep track of whether or not this Fragment has run performCreate(). Retained instance |
| // fragments can have mRetaining set to true without going through creation, so we must |
| // track it separately. |
| boolean mIsCreated; |
| |
| LifecycleRegistry mLifecycleRegistry; |
| |
| // This is initialized in performCreateView and unavailable outside of the |
| // onCreateView/onDestroyView lifecycle |
| @Nullable FragmentViewLifecycleOwner mViewLifecycleOwner; |
| MutableLiveData<LifecycleOwner> mViewLifecycleOwnerLiveData = new MutableLiveData<>(); |
| |
| SavedStateRegistryController mSavedStateRegistryController = new SavedStateRegistryController(); |
| |
| // Cache the ContentView layoutIds for Fragments. |
| private static final HashMap<Class, Integer> sAnnotationIds = new HashMap<>(); |
| |
| /** |
| * {@inheritDoc} |
| * <p> |
| * Overriding this method is no longer supported and this method will be made |
| * <code>final</code> in a future version of Fragment. |
| */ |
| @Override |
| @NonNull |
| public Lifecycle getLifecycle() { |
| return mLifecycleRegistry; |
| } |
| |
| /** |
| * Get a {@link LifecycleOwner} that represents the {@link #getView() Fragment's View} |
| * lifecycle. In most cases, this mirrors the lifecycle of the Fragment itself, but in cases |
| * of {@link FragmentTransaction#detach(Fragment) detached} Fragments, the lifecycle of the |
| * Fragment can be considerably longer than the lifecycle of the View itself. |
| * <p> |
| * Namely, the lifecycle of the Fragment's View is: |
| * <ol> |
| * <li>{@link Lifecycle.Event#ON_CREATE created} after {@link #onViewStateRestored(Bundle)}</li> |
| * <li>{@link Lifecycle.Event#ON_START started} after {@link #onStart()}</li> |
| * <li>{@link Lifecycle.Event#ON_RESUME resumed} after {@link #onResume()}</li> |
| * <li>{@link Lifecycle.Event#ON_PAUSE paused} before {@link #onPause()}</li> |
| * <li>{@link Lifecycle.Event#ON_STOP stopped} before {@link #onStop()}</li> |
| * <li>{@link Lifecycle.Event#ON_DESTROY destroyed} before {@link #onDestroyView()}</li> |
| * </ol> |
| * |
| * The first method where it is safe to access the view lifecycle is |
| * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} under the condition that you must |
| * return a non-null view (an IllegalStateException will be thrown if you access the view |
| * lifecycle but don't return a non-null view). |
| * <p>The view lifecycle remains valid through the call to {@link #onDestroyView()}, after which |
| * {@link #getView()} will return null, the view lifecycle will be destroyed, and this method |
| * will throw an IllegalStateException. Consider using |
| * {@link #getViewLifecycleOwnerLiveData()} or {@link FragmentTransaction#runOnCommit(Runnable)} |
| * to receive a callback for when the Fragment's view lifecycle is available. |
| * <p> |
| * This should only be called on the main thread. |
| * <p> |
| * Overriding this method is no longer supported and this method will be made |
| * <code>final</code> in a future version of Fragment. |
| * |
| * @return A {@link LifecycleOwner} that represents the {@link #getView() Fragment's View} |
| * lifecycle. |
| * @throws IllegalStateException if the {@link #getView() Fragment's View is null}. |
| */ |
| @MainThread |
| @NonNull |
| public LifecycleOwner getViewLifecycleOwner() { |
| if (mViewLifecycleOwner == null) { |
| throw new IllegalStateException("Can't access the Fragment View's LifecycleOwner when " |
| + "getView() is null i.e., before onCreateView() or after onDestroyView()"); |
| } |
| return mViewLifecycleOwner; |
| } |
| |
| /** |
| * Retrieve a {@link LiveData} which allows you to observe the |
| * {@link #getViewLifecycleOwner() lifecycle of the Fragment's View}. |
| * <p> |
| * This will be set to the new {@link LifecycleOwner} after {@link #onCreateView} returns a |
| * non-null View and will set to null after {@link #onDestroyView()}. |
| * <p> |
| * Overriding this method is no longer supported and this method will be made |
| * <code>final</code> in a future version of Fragment. |
| * |
| * @return A LiveData that changes in sync with {@link #getViewLifecycleOwner()}. |
| */ |
| @NonNull |
| public LiveData<LifecycleOwner> getViewLifecycleOwnerLiveData() { |
| return mViewLifecycleOwnerLiveData; |
| } |
| |
| /** |
| * Returns the {@link ViewModelStore} associated with this Fragment |
| * <p> |
| * Overriding this method is no longer supported and this method will be made |
| * <code>final</code> in a future version of Fragment. |
| * |
| * @return a {@code ViewModelStore} |
| * @throws IllegalStateException if called before the Fragment is attached i.e., before |
| * onAttach(). |
| */ |
| @NonNull |
| @Override |
| public ViewModelStore getViewModelStore() { |
| if (mFragmentManager == null) { |
| throw new IllegalStateException("Can't access ViewModels from detached fragment"); |
| } |
| return mFragmentManager.getViewModelStore(this); |
| } |
| |
| @NonNull |
| @Override |
| public final SavedStateRegistry getSavedStateRegistry() { |
| return mSavedStateRegistryController.getSavedStateRegistry(); |
| } |
| |
| /** |
| * State information that has been retrieved from a fragment instance |
| * through {@link FragmentManager#saveFragmentInstanceState(Fragment) |
| * FragmentManager.saveFragmentInstanceState}. |
| */ |
| @SuppressLint("BanParcelableUsage") |
| public static class SavedState implements Parcelable { |
| final Bundle mState; |
| |
| SavedState(Bundle state) { |
| mState = state; |
| } |
| |
| SavedState(@NonNull Parcel in, @Nullable ClassLoader loader) { |
| mState = in.readBundle(); |
| if (loader != null && mState != null) { |
| mState.setClassLoader(loader); |
| } |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(@NonNull Parcel dest, int flags) { |
| dest.writeBundle(mState); |
| } |
| |
| @NonNull |
| public static final Parcelable.Creator<SavedState> CREATOR = |
| new Parcelable.ClassLoaderCreator<SavedState>() { |
| @Override |
| public SavedState createFromParcel(Parcel in) { |
| return new SavedState(in, null); |
| } |
| |
| @Override |
| public SavedState createFromParcel(Parcel in, ClassLoader loader) { |
| return new SavedState(in, loader); |
| } |
| |
| @Override |
| public SavedState[] newArray(int size) { |
| return new SavedState[size]; |
| } |
| }; |
| } |
| |
| /** |
| * Thrown by {@link FragmentFactory#instantiate(ClassLoader, String, Bundle)} when |
| * there is an instantiation failure. |
| */ |
| @SuppressWarnings("JavaLangClash") |
| public static class InstantiationException extends RuntimeException { |
| public InstantiationException(@NonNull String msg, @Nullable Exception cause) { |
| super(msg, cause); |
| } |
| } |
| |
| /** |
| * Default constructor. <strong>Every</strong> fragment must have an |
| * empty constructor, so it can be instantiated when restoring its |
| * activity's state. It is strongly recommended that subclasses do not |
| * have other constructors with parameters, since these constructors |
| * will not be called when the fragment is re-instantiated; instead, |
| * arguments can be supplied by the caller with {@link #setArguments} |
| * and later retrieved by the Fragment with {@link #getArguments}. |
| * |
| * <p>Applications should generally not implement a constructor. Prefer |
| * {@link #onAttach(Context)} instead. It is the first place application code can run where |
| * the fragment is ready to be used - the point where the fragment is actually associated with |
| * its context. Some applications may also want to implement {@link #onInflate} to retrieve |
| * attributes from a layout resource, although note this happens when the fragment is attached. |
| */ |
| public Fragment() { |
| initLifecycle(); |
| } |
| |
| @SuppressLint("RestrictedApi") |
| private void initLifecycle() { |
| mLifecycleRegistry = new LifecycleRegistry(this); |
| if (Build.VERSION.SDK_INT >= 19) { |
| mLifecycleRegistry.addObserver(new GenericLifecycleObserver() { |
| @Override |
| public void onStateChanged(LifecycleOwner source, Lifecycle.Event event) { |
| if (event == Lifecycle.Event.ON_STOP) { |
| if (mView != null) { |
| mView.cancelPendingInputEvents(); |
| } |
| } |
| } |
| }); |
| } |
| } |
| |
| /** |
| * Like {@link #instantiate(Context, String, Bundle)} but with a null |
| * argument Bundle. |
| * @deprecated Use {@link FragmentManager#getFragmentFactory()} and |
| * {@link FragmentFactory#instantiate(ClassLoader, String, Bundle)} |
| */ |
| @SuppressWarnings("deprecation") |
| @Deprecated |
| @NonNull |
| public static Fragment instantiate(@NonNull Context context, @NonNull String fname) { |
| return instantiate(context, fname, null); |
| } |
| |
| /** |
| * Create a new instance of a Fragment with the given class name. This is |
| * the same as calling its empty constructor, setting the {@link ClassLoader} on the |
| * supplied arguments, then calling {@link #setArguments(Bundle)}. |
| * |
| * @param context The calling context being used to instantiate the fragment. |
| * This is currently just used to get its ClassLoader. |
| * @param fname The class name of the fragment to instantiate. |
| * @param args Bundle of arguments to supply to the fragment, which it |
| * can retrieve with {@link #getArguments()}. May be null. |
| * @return Returns a new fragment instance. |
| * @throws InstantiationException If there is a failure in instantiating |
| * the given fragment class. This is a runtime exception; it is not |
| * normally expected to happen. |
| * @deprecated Use {@link FragmentManager#getFragmentFactory()} and |
| * {@link FragmentFactory#instantiate(ClassLoader, String, Bundle)}, manually calling |
| * {@link #setArguments(Bundle)} on the returned Fragment. |
| */ |
| @Deprecated |
| @NonNull |
| public static Fragment instantiate(@NonNull Context context, @NonNull String fname, |
| @Nullable Bundle args) { |
| try { |
| Class<? extends Fragment> clazz = FragmentFactory.loadFragmentClass( |
| context.getClassLoader(), fname); |
| Fragment f = clazz.getConstructor().newInstance(); |
| if (args != null) { |
| args.setClassLoader(f.getClass().getClassLoader()); |
| f.setArguments(args); |
| } |
| return f; |
| } catch (java.lang.InstantiationException e) { |
| throw new InstantiationException("Unable to instantiate fragment " + fname |
| + ": make sure class name exists, is public, and has an" |
| + " empty constructor that is public", e); |
| } catch (IllegalAccessException e) { |
| throw new InstantiationException("Unable to instantiate fragment " + fname |
| + ": make sure class name exists, is public, and has an" |
| + " empty constructor that is public", e); |
| } catch (NoSuchMethodException e) { |
| throw new InstantiationException("Unable to instantiate fragment " + fname |
| + ": could not find Fragment constructor", e); |
| } catch (InvocationTargetException e) { |
| throw new InstantiationException("Unable to instantiate fragment " + fname |
| + ": calling Fragment constructor caused an exception", e); |
| } |
| } |
| |
| final void restoreViewState(Bundle savedInstanceState) { |
| if (mSavedViewState != null) { |
| mInnerView.restoreHierarchyState(mSavedViewState); |
| mSavedViewState = null; |
| } |
| mCalled = false; |
| onViewStateRestored(savedInstanceState); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onViewStateRestored()"); |
| } |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_CREATE); |
| } |
| } |
| |
| final boolean isInBackStack() { |
| return mBackStackNesting > 0; |
| } |
| |
| /** |
| * Subclasses can not override equals(). |
| */ |
| @Override public final boolean equals(@Nullable Object o) { |
| return super.equals(o); |
| } |
| |
| /** |
| * Subclasses can not override hashCode(). |
| */ |
| @Override public final int hashCode() { |
| return super.hashCode(); |
| } |
| |
| @Override |
| @SuppressLint({"UnknownNullness", "RestrictedApi"}) |
| public String toString() { |
| StringBuilder sb = new StringBuilder(128); |
| DebugUtils.buildShortClassTag(this, sb); |
| sb.append(" ("); |
| sb.append(mWho); |
| sb.append(")"); |
| if (mFragmentId != 0) { |
| sb.append(" id=0x"); |
| sb.append(Integer.toHexString(mFragmentId)); |
| } |
| if (mTag != null) { |
| sb.append(" "); |
| sb.append(mTag); |
| } |
| sb.append('}'); |
| return sb.toString(); |
| } |
| |
| /** |
| * Return the identifier this fragment is known by. This is either |
| * the android:id value supplied in a layout or the container view ID |
| * supplied when adding the fragment. |
| */ |
| final public int getId() { |
| return mFragmentId; |
| } |
| |
| /** |
| * Get the tag name of the fragment, if specified. |
| */ |
| @Nullable |
| final public String getTag() { |
| return mTag; |
| } |
| |
| /** |
| * Supply the construction arguments for this fragment. |
| * The arguments supplied here will be retained across fragment destroy and |
| * creation. |
| * <p>This method cannot be called if the fragment is added to a FragmentManager and |
| * if {@link #isStateSaved()} would return true.</p> |
| */ |
| public void setArguments(@Nullable Bundle args) { |
| if (mFragmentManager != null && isStateSaved()) { |
| throw new IllegalStateException("Fragment already added and state has been saved"); |
| } |
| mArguments = args; |
| } |
| |
| /** |
| * Return the arguments supplied when the fragment was instantiated, |
| * if any. |
| */ |
| @Nullable |
| final public Bundle getArguments() { |
| return mArguments; |
| } |
| |
| /** |
| * Return the arguments supplied when the fragment was instantiated. |
| * |
| * @throws IllegalStateException if no arguments were supplied to the Fragment. |
| * @see #getArguments() |
| */ |
| @NonNull |
| public final Bundle requireArguments() { |
| Bundle arguments = getArguments(); |
| if (arguments == null) { |
| throw new IllegalStateException("Fragment " + this + " does not have any arguments."); |
| } |
| return arguments; |
| } |
| |
| /** |
| * Returns true if this fragment is added and its state has already been saved |
| * by its host. Any operations that would change saved state should not be performed |
| * if this method returns true, and some operations such as {@link #setArguments(Bundle)} |
| * will fail. |
| * |
| * @return true if this fragment's state has already been saved by its host |
| */ |
| public final boolean isStateSaved() { |
| if (mFragmentManager == null) { |
| return false; |
| } |
| return mFragmentManager.isStateSaved(); |
| } |
| |
| /** |
| * Set the initial saved state that this Fragment should restore itself |
| * from when first being constructed, as returned by |
| * {@link FragmentManager#saveFragmentInstanceState(Fragment) |
| * FragmentManager.saveFragmentInstanceState}. |
| * |
| * @param state The state the fragment should be restored from. |
| */ |
| public void setInitialSavedState(@Nullable SavedState state) { |
| if (mFragmentManager != null) { |
| throw new IllegalStateException("Fragment already added"); |
| } |
| mSavedFragmentState = state != null && state.mState != null |
| ? state.mState : null; |
| } |
| |
| /** |
| * Optional target for this fragment. This may be used, for example, |
| * if this fragment is being started by another, and when done wants to |
| * give a result back to the first. The target set here is retained |
| * across instances via {@link FragmentManager#putFragment |
| * FragmentManager.putFragment()}. |
| * |
| * @param fragment The fragment that is the target of this one. |
| * @param requestCode Optional request code, for convenience if you |
| * are going to call back with {@link #onActivityResult(int, int, Intent)}. |
| */ |
| @SuppressWarnings("ReferenceEquality") |
| public void setTargetFragment(@Nullable Fragment fragment, int requestCode) { |
| // Don't allow a caller to set a target fragment in another FragmentManager, |
| // but there's a snag: people do set target fragments before fragments get added. |
| // We'll have the FragmentManager check that for validity when we move |
| // the fragments to a valid state. |
| final FragmentManager mine = getFragmentManager(); |
| final FragmentManager theirs = fragment != null ? fragment.getFragmentManager() : null; |
| if (mine != null && theirs != null && mine != theirs) { |
| throw new IllegalArgumentException("Fragment " + fragment |
| + " must share the same FragmentManager to be set as a target fragment"); |
| } |
| |
| // Don't let someone create a cycle. |
| for (Fragment check = fragment; check != null; check = check.getTargetFragment()) { |
| if (check == this) { |
| throw new IllegalArgumentException("Setting " + fragment + " as the target of " |
| + this + " would create a target cycle"); |
| } |
| } |
| if (fragment == null) { |
| mTargetWho = null; |
| mTarget = null; |
| } else if (mFragmentManager != null && fragment.mFragmentManager != null) { |
| // Just save the reference to the Fragment |
| mTargetWho = fragment.mWho; |
| } else { |
| // Save the Fragment itself, waiting until we're attached |
| mTarget = fragment; |
| } |
| mTargetRequestCode = requestCode; |
| } |
| |
| /** |
| * Return the target fragment set by {@link #setTargetFragment}. |
| */ |
| @Nullable |
| final public Fragment getTargetFragment() { |
| if (mTarget != null) { |
| // Ensure that any Fragment set with setTargetFragment is immediately |
| // available here |
| return mTarget; |
| } else if (mFragmentManager != null && mTargetWho != null) { |
| // Look up the target Fragment from the FragmentManager |
| return mFragmentManager.mActive.get(mTargetWho); |
| } |
| return null; |
| } |
| |
| /** |
| * Return the target request code set by {@link #setTargetFragment}. |
| */ |
| final public int getTargetRequestCode() { |
| return mTargetRequestCode; |
| } |
| |
| /** |
| * Return the {@link Context} this fragment is currently associated with. |
| * |
| * @see #requireContext() |
| */ |
| @Nullable |
| public Context getContext() { |
| return mHost == null ? null : mHost.getContext(); |
| } |
| |
| /** |
| * Return the {@link Context} this fragment is currently associated with. |
| * |
| * @throws IllegalStateException if not currently associated with a context. |
| * @see #getContext() |
| */ |
| @NonNull |
| public final Context requireContext() { |
| Context context = getContext(); |
| if (context == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to a context."); |
| } |
| return context; |
| } |
| |
| /** |
| * Return the {@link FragmentActivity} this fragment is currently associated with. |
| * May return {@code null} if the fragment is associated with a {@link Context} |
| * instead. |
| * |
| * @see #requireActivity() |
| */ |
| @Nullable |
| final public FragmentActivity getActivity() { |
| return mHost == null ? null : (FragmentActivity) mHost.getActivity(); |
| } |
| |
| /** |
| * Return the {@link FragmentActivity} this fragment is currently associated with. |
| * |
| * @throws IllegalStateException if not currently associated with an activity or if associated |
| * only with a context. |
| * @see #getActivity() |
| */ |
| @NonNull |
| public final FragmentActivity requireActivity() { |
| FragmentActivity activity = getActivity(); |
| if (activity == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to an activity."); |
| } |
| return activity; |
| } |
| |
| /** |
| * Return the host object of this fragment. May return {@code null} if the fragment |
| * isn't currently being hosted. |
| * |
| * @see #requireHost() |
| */ |
| @Nullable |
| final public Object getHost() { |
| return mHost == null ? null : mHost.onGetHost(); |
| } |
| |
| /** |
| * Return the host object of this fragment. |
| * |
| * @throws IllegalStateException if not currently associated with a host. |
| * @see #getHost() |
| */ |
| @NonNull |
| public final Object requireHost() { |
| Object host = getHost(); |
| if (host == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to a host."); |
| } |
| return host; |
| } |
| |
| /** |
| * Return <code>requireActivity().getResources()</code>. |
| */ |
| @NonNull |
| final public Resources getResources() { |
| return requireContext().getResources(); |
| } |
| |
| /** |
| * Return a localized, styled CharSequence from the application's package's |
| * default string table. |
| * |
| * @param resId Resource id for the CharSequence text |
| */ |
| @NonNull |
| public final CharSequence getText(@StringRes int resId) { |
| return getResources().getText(resId); |
| } |
| |
| /** |
| * Return a localized string from the application's package's |
| * default string table. |
| * |
| * @param resId Resource id for the string |
| */ |
| @NonNull |
| public final String getString(@StringRes int resId) { |
| return getResources().getString(resId); |
| } |
| |
| /** |
| * Return a localized formatted string from the application's package's |
| * default string table, substituting the format arguments as defined in |
| * {@link java.util.Formatter} and {@link java.lang.String#format}. |
| * |
| * @param resId Resource id for the format string |
| * @param formatArgs The format arguments that will be used for substitution. |
| */ |
| @NonNull |
| public final String getString(@StringRes int resId, @Nullable Object... formatArgs) { |
| return getResources().getString(resId, formatArgs); |
| } |
| |
| /** |
| * Return the FragmentManager for interacting with fragments associated |
| * with this fragment's activity. Note that this will be non-null slightly |
| * before {@link #getActivity()}, during the time from when the fragment is |
| * placed in a {@link FragmentTransaction} until it is committed and |
| * attached to its activity. |
| * |
| * <p>If this Fragment is a child of another Fragment, the FragmentManager |
| * returned here will be the parent's {@link #getChildFragmentManager()}. |
| * |
| * @see #requireFragmentManager() |
| */ |
| @Nullable |
| final public FragmentManager getFragmentManager() { |
| return mFragmentManager; |
| } |
| |
| /** |
| * Return the FragmentManager for interacting with fragments associated |
| * with this fragment's activity. Note that this will available slightly |
| * before {@link #getActivity()}, during the time from when the fragment is |
| * placed in a {@link FragmentTransaction} until it is committed and |
| * attached to its activity. |
| * |
| * <p>If this Fragment is a child of another Fragment, the FragmentManager |
| * returned here will be the parent's {@link #getChildFragmentManager()}. |
| * |
| * @throws IllegalStateException if not associated with a transaction or host. |
| * @see #getFragmentManager() |
| */ |
| @NonNull |
| public final FragmentManager requireFragmentManager() { |
| FragmentManager fragmentManager = getFragmentManager(); |
| if (fragmentManager == null) { |
| throw new IllegalStateException( |
| "Fragment " + this + " not associated with a fragment manager."); |
| } |
| return fragmentManager; |
| } |
| |
| /** |
| * Return a private FragmentManager for placing and managing Fragments |
| * inside of this Fragment. |
| */ |
| @NonNull |
| final public FragmentManager getChildFragmentManager() { |
| if (mChildFragmentManager == null) { |
| instantiateChildFragmentManager(); |
| if (mState >= RESUMED) { |
| mChildFragmentManager.dispatchResume(); |
| } else if (mState >= STARTED) { |
| mChildFragmentManager.dispatchStart(); |
| } else if (mState >= ACTIVITY_CREATED) { |
| mChildFragmentManager.dispatchActivityCreated(); |
| } else if (mState >= CREATED) { |
| mChildFragmentManager.dispatchCreate(); |
| } |
| } |
| return mChildFragmentManager; |
| } |
| |
| /** |
| * Return this fragment's child FragmentManager one has been previously created, |
| * otherwise null. |
| */ |
| @Nullable |
| FragmentManager peekChildFragmentManager() { |
| return mChildFragmentManager; |
| } |
| |
| /** |
| * Returns the parent Fragment containing this Fragment. If this Fragment |
| * is attached directly to an Activity, returns null. |
| */ |
| @Nullable |
| final public Fragment getParentFragment() { |
| return mParentFragment; |
| } |
| |
| /** |
| * Returns the parent Fragment containing this Fragment. |
| * |
| * @throws IllegalStateException if this Fragment is attached directly to an Activity or |
| * other Fragment host. |
| * @see #getParentFragment() |
| */ |
| @NonNull |
| public final Fragment requireParentFragment() { |
| Fragment parentFragment = getParentFragment(); |
| if (parentFragment == null) { |
| Context context = getContext(); |
| if (context == null) { |
| throw new IllegalStateException("Fragment " + this + " is not attached to" |
| + " any Fragment or host"); |
| } else { |
| throw new IllegalStateException("Fragment " + this + " is not a child Fragment, it" |
| + " is directly attached to " + getContext()); |
| } |
| } |
| return parentFragment; |
| } |
| |
| /** |
| * Return true if the fragment is currently added to its activity. |
| */ |
| final public boolean isAdded() { |
| return mHost != null && mAdded; |
| } |
| |
| /** |
| * Return true if the fragment has been explicitly detached from the UI. |
| * That is, {@link FragmentTransaction#detach(Fragment) |
| * FragmentTransaction.detach(Fragment)} has been used on it. |
| */ |
| final public boolean isDetached() { |
| return mDetached; |
| } |
| |
| /** |
| * Return true if this fragment is currently being removed from its |
| * activity. This is <em>not</em> whether its activity is finishing, but |
| * rather whether it is in the process of being removed from its activity. |
| */ |
| final public boolean isRemoving() { |
| return mRemoving; |
| } |
| |
| /** |
| * Return true if the layout is included as part of an activity view |
| * hierarchy via the <fragment> tag. This will always be true when |
| * fragments are created through the <fragment> tag, <em>except</em> |
| * in the case where an old fragment is restored from a previous state and |
| * it does not appear in the layout of the current state. |
| */ |
| final public boolean isInLayout() { |
| return mInLayout; |
| } |
| |
| /** |
| * Return true if the fragment is in the resumed state. This is true |
| * for the duration of {@link #onResume()} and {@link #onPause()} as well. |
| */ |
| final public boolean isResumed() { |
| return mState >= RESUMED; |
| } |
| |
| /** |
| * Return true if the fragment is currently visible to the user. This means |
| * it: (1) has been added, (2) has its view attached to the window, and |
| * (3) is not hidden. |
| */ |
| final public boolean isVisible() { |
| return isAdded() && !isHidden() && mView != null |
| && mView.getWindowToken() != null && mView.getVisibility() == View.VISIBLE; |
| } |
| |
| /** |
| * Return true if the fragment has been hidden. By default fragments |
| * are shown. You can find out about changes to this state with |
| * {@link #onHiddenChanged}. Note that the hidden state is orthogonal |
| * to other states -- that is, to be visible to the user, a fragment |
| * must be both started and not hidden. |
| */ |
| final public boolean isHidden() { |
| return mHidden; |
| } |
| |
| /** @hide */ |
| @RestrictTo(LIBRARY_GROUP) |
| final public boolean hasOptionsMenu() { |
| return mHasMenu; |
| } |
| |
| /** @hide */ |
| @RestrictTo(LIBRARY_GROUP) |
| final public boolean isMenuVisible() { |
| return mMenuVisible; |
| } |
| |
| /** |
| * Called when the hidden state (as returned by {@link #isHidden()} of |
| * the fragment has changed. Fragments start out not hidden; this will |
| * be called whenever the fragment changes state from that. |
| * @param hidden True if the fragment is now hidden, false otherwise. |
| */ |
| public void onHiddenChanged(boolean hidden) { |
| } |
| |
| /** |
| * Control whether a fragment instance is retained across Activity |
| * re-creation (such as from a configuration change). If set, the fragment |
| * lifecycle will be slightly different when an activity is recreated: |
| * <ul> |
| * <li> {@link #onDestroy()} will not be called (but {@link #onDetach()} still |
| * will be, because the fragment is being detached from its current activity). |
| * <li> {@link #onCreate(Bundle)} will not be called since the fragment |
| * is not being re-created. |
| * <li> {@link #onAttach(Activity)} and {@link #onActivityCreated(Bundle)} <b>will</b> |
| * still be called. |
| * </ul> |
| */ |
| public void setRetainInstance(boolean retain) { |
| mRetainInstance = retain; |
| if (mFragmentManager != null) { |
| if (retain) { |
| mFragmentManager.addRetainedFragment(this); |
| } else { |
| mFragmentManager.removeRetainedFragment(this); |
| } |
| } else { |
| mRetainInstanceChangedWhileDetached = true; |
| } |
| } |
| |
| final public boolean getRetainInstance() { |
| return mRetainInstance; |
| } |
| |
| /** |
| * Report that this fragment would like to participate in populating |
| * the options menu by receiving a call to {@link #onCreateOptionsMenu} |
| * and related methods. |
| * |
| * @param hasMenu If true, the fragment has menu items to contribute. |
| */ |
| public void setHasOptionsMenu(boolean hasMenu) { |
| if (mHasMenu != hasMenu) { |
| mHasMenu = hasMenu; |
| if (isAdded() && !isHidden()) { |
| mHost.onSupportInvalidateOptionsMenu(); |
| } |
| } |
| } |
| |
| /** |
| * Set a hint for whether this fragment's menu should be visible. This |
| * is useful if you know that a fragment has been placed in your view |
| * hierarchy so that the user can not currently seen it, so any menu items |
| * it has should also not be shown. |
| * |
| * @param menuVisible The default is true, meaning the fragment's menu will |
| * be shown as usual. If false, the user will not see the menu. |
| */ |
| public void setMenuVisibility(boolean menuVisible) { |
| if (mMenuVisible != menuVisible) { |
| mMenuVisible = menuVisible; |
| if (mHasMenu && isAdded() && !isHidden()) { |
| mHost.onSupportInvalidateOptionsMenu(); |
| } |
| } |
| } |
| |
| /** |
| * Set a hint to the system about whether this fragment's UI is currently visible |
| * to the user. This hint defaults to true and is persistent across fragment instance |
| * state save and restore. |
| * |
| * <p>An app may set this to false to indicate that the fragment's UI is |
| * scrolled out of visibility or is otherwise not directly visible to the user. |
| * This may be used by the system to prioritize operations such as fragment lifecycle updates |
| * or loader ordering behavior.</p> |
| * |
| * <p><strong>Note:</strong> This method may be called outside of the fragment lifecycle. |
| * and thus has no ordering guarantees with regard to fragment lifecycle method calls.</p> |
| * |
| * @param isVisibleToUser true if this fragment's UI is currently visible to the user (default), |
| * false if it is not. |
| */ |
| public void setUserVisibleHint(boolean isVisibleToUser) { |
| if (!mUserVisibleHint && isVisibleToUser && mState < STARTED |
| && mFragmentManager != null && isAdded() && mIsCreated) { |
| mFragmentManager.performPendingDeferredStart(this); |
| } |
| mUserVisibleHint = isVisibleToUser; |
| mDeferStart = mState < STARTED && !isVisibleToUser; |
| if (mSavedFragmentState != null) { |
| // Ensure that if the user visible hint is set before the Fragment has |
| // restored its state that we don't lose the new value |
| mSavedUserVisibleHint = isVisibleToUser; |
| } |
| } |
| |
| /** |
| * @return The current value of the user-visible hint on this fragment. |
| * @see #setUserVisibleHint(boolean) |
| */ |
| public boolean getUserVisibleHint() { |
| return mUserVisibleHint; |
| } |
| |
| /** |
| * Return the LoaderManager for this fragment. |
| * |
| * @deprecated Use |
| * {@link LoaderManager#getInstance(LifecycleOwner) LoaderManager.getInstance(this)}. |
| */ |
| @Deprecated |
| @NonNull |
| public LoaderManager getLoaderManager() { |
| return LoaderManager.getInstance(this); |
| } |
| |
| /** |
| * Call {@link Activity#startActivity(Intent)} from the fragment's |
| * containing Activity. |
| */ |
| public void startActivity(@SuppressLint("UnknownNullness") Intent intent) { |
| startActivity(intent, null); |
| } |
| |
| /** |
| * Call {@link Activity#startActivity(Intent, Bundle)} from the fragment's |
| * containing Activity. |
| */ |
| public void startActivity(@SuppressLint("UnknownNullness") Intent intent, |
| @Nullable Bundle options) { |
| if (mHost == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to Activity"); |
| } |
| mHost.onStartActivityFromFragment(this /*fragment*/, intent, -1, options); |
| } |
| |
| /** |
| * Call {@link Activity#startActivityForResult(Intent, int)} from the fragment's |
| * containing Activity. |
| */ |
| public void startActivityForResult(@SuppressLint("UnknownNullness") Intent intent, |
| int requestCode) { |
| startActivityForResult(intent, requestCode, null); |
| } |
| |
| /** |
| * Call {@link Activity#startActivityForResult(Intent, int, Bundle)} from the fragment's |
| * containing Activity. |
| */ |
| public void startActivityForResult(@SuppressLint("UnknownNullness") Intent intent, |
| int requestCode, @Nullable Bundle options) { |
| if (mHost == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to Activity"); |
| } |
| mHost.onStartActivityFromFragment(this /*fragment*/, intent, requestCode, options); |
| } |
| |
| /** |
| * Call {@link Activity#startIntentSenderForResult(IntentSender, int, Intent, int, int, int, |
| * Bundle)} from the fragment's containing Activity. |
| */ |
| public void startIntentSenderForResult(@SuppressLint("UnknownNullness") IntentSender intent, |
| int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, |
| int extraFlags, @Nullable Bundle options) throws IntentSender.SendIntentException { |
| if (mHost == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to Activity"); |
| } |
| mHost.onStartIntentSenderFromFragment(this, intent, requestCode, fillInIntent, flagsMask, |
| flagsValues, extraFlags, options); |
| } |
| |
| /** |
| * Receive the result from a previous call to |
| * {@link #startActivityForResult(Intent, int)}. This follows the |
| * related Activity API as described there in |
| * {@link Activity#onActivityResult(int, int, Intent)}. |
| * |
| * @param requestCode The integer request code originally supplied to |
| * startActivityForResult(), allowing you to identify who this |
| * result came from. |
| * @param resultCode The integer result code returned by the child activity |
| * through its setResult(). |
| * @param data An Intent, which can return result data to the caller |
| * (various data can be attached to Intent "extras"). |
| */ |
| public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { |
| } |
| |
| /** |
| * Requests permissions to be granted to this application. These permissions |
| * must be requested in your manifest, they should not be granted to your app, |
| * and they should have protection level {@link android.content.pm.PermissionInfo |
| * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by |
| * the platform or a third-party app. |
| * <p> |
| * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} |
| * are granted at install time if requested in the manifest. Signature permissions |
| * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at |
| * install time if requested in the manifest and the signature of your app matches |
| * the signature of the app declaring the permissions. |
| * </p> |
| * <p> |
| * If your app does not have the requested permissions the user will be presented |
| * with UI for accepting them. After the user has accepted or rejected the |
| * requested permissions you will receive a callback on {@link |
| * #onRequestPermissionsResult(int, String[], int[])} reporting whether the |
| * permissions were granted or not. |
| * </p> |
| * <p> |
| * Note that requesting a permission does not guarantee it will be granted and |
| * your app should be able to run without having this permission. |
| * </p> |
| * <p> |
| * This method may start an activity allowing the user to choose which permissions |
| * to grant and which to reject. Hence, you should be prepared that your activity |
| * may be paused and resumed. Further, granting some permissions may require |
| * a restart of you application. In such a case, the system will recreate the |
| * activity stack before delivering the result to {@link |
| * #onRequestPermissionsResult(int, String[], int[])}. |
| * </p> |
| * <p> |
| * When checking whether you have a permission you should use {@link |
| * android.content.Context#checkSelfPermission(String)}. |
| * </p> |
| * <p> |
| * Calling this API for permissions already granted to your app would show UI |
| * to the user to decided whether the app can still hold these permissions. This |
| * can be useful if the way your app uses the data guarded by the permissions |
| * changes significantly. |
| * </p> |
| * <p> |
| * A sample permissions request looks like this: |
| * </p> |
| * <code><pre><p> |
| * private void showContacts() { |
| * if (getActivity().checkSelfPermission(Manifest.permission.READ_CONTACTS) |
| * != PackageManager.PERMISSION_GRANTED) { |
| * requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, |
| * PERMISSIONS_REQUEST_READ_CONTACTS); |
| * } else { |
| * doShowContacts(); |
| * } |
| * } |
| * |
| * {@literal @}Override |
| * public void onRequestPermissionsResult(int requestCode, String[] permissions, |
| * int[] grantResults) { |
| * if (requestCode == PERMISSIONS_REQUEST_READ_CONTACTS |
| * && grantResults[0] == PackageManager.PERMISSION_GRANTED) { |
| * doShowContacts(); |
| * } |
| * } |
| * </code></pre></p> |
| * |
| * @param permissions The requested permissions. |
| * @param requestCode Application specific request code to match with a result |
| * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. |
| * |
| * @see #onRequestPermissionsResult(int, String[], int[]) |
| * @see android.content.Context#checkSelfPermission(String) |
| */ |
| public final void requestPermissions(@NonNull String[] permissions, int requestCode) { |
| if (mHost == null) { |
| throw new IllegalStateException("Fragment " + this + " not attached to Activity"); |
| } |
| mHost.onRequestPermissionsFromFragment(this, permissions, requestCode); |
| } |
| |
| /** |
| * Callback for the result from requesting permissions. This method |
| * is invoked for every call on {@link #requestPermissions(String[], int)}. |
| * <p> |
| * <strong>Note:</strong> It is possible that the permissions request interaction |
| * with the user is interrupted. In this case you will receive empty permissions |
| * and results arrays which should be treated as a cancellation. |
| * </p> |
| * |
| * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. |
| * @param permissions The requested permissions. Never null. |
| * @param grantResults The grant results for the corresponding permissions |
| * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} |
| * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. |
| * |
| * @see #requestPermissions(String[], int) |
| */ |
| public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, |
| @NonNull int[] grantResults) { |
| /* callback - do nothing */ |
| } |
| |
| /** |
| * Gets whether you should show UI with rationale for requesting a permission. |
| * You should do this only if you do not have the permission and the context in |
| * which the permission is requested does not clearly communicate to the user |
| * what would be the benefit from granting this permission. |
| * <p> |
| * For example, if you write a camera app, requesting the camera permission |
| * would be expected by the user and no rationale for why it is requested is |
| * needed. If however, the app needs location for tagging photos then a non-tech |
| * savvy user may wonder how location is related to taking photos. In this case |
| * you may choose to show UI with rationale of requesting this permission. |
| * </p> |
| * |
| * @param permission A permission your app wants to request. |
| * @return Whether you can show permission rationale UI. |
| * |
| * @see Context#checkSelfPermission(String) |
| * @see #requestPermissions(String[], int) |
| * @see #onRequestPermissionsResult(int, String[], int[]) |
| */ |
| public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { |
| if (mHost != null) { |
| return mHost.onShouldShowRequestPermissionRationale(permission); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the LayoutInflater used to inflate Views of this Fragment. The default |
| * implementation will throw an exception if the Fragment is not attached. |
| * |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| * @return The LayoutInflater used to inflate Views of this Fragment. |
| */ |
| @NonNull |
| public LayoutInflater onGetLayoutInflater(@Nullable Bundle savedInstanceState) { |
| // TODO: move the implementation in getLayoutInflater to here |
| return getLayoutInflater(savedInstanceState); |
| } |
| |
| /** |
| * Returns the cached LayoutInflater used to inflate Views of this Fragment. If |
| * {@link #onGetLayoutInflater(Bundle)} has not been called {@link #onGetLayoutInflater(Bundle)} |
| * will be called with a {@code null} argument and that value will be cached. |
| * <p> |
| * The cached LayoutInflater will be replaced immediately prior to |
| * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} and cleared immediately after |
| * {@link #onDetach()}. |
| * |
| * @return The LayoutInflater used to inflate Views of this Fragment. |
| */ |
| @NonNull |
| public final LayoutInflater getLayoutInflater() { |
| if (mLayoutInflater == null) { |
| return performGetLayoutInflater(null); |
| } |
| return mLayoutInflater; |
| } |
| |
| /** |
| * Calls {@link #onGetLayoutInflater(Bundle)} and caches the result for use by |
| * {@link #getLayoutInflater()}. |
| * |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| * @return The LayoutInflater used to inflate Views of this Fragment. |
| */ |
| @NonNull |
| LayoutInflater performGetLayoutInflater(@Nullable Bundle savedInstanceState) { |
| LayoutInflater layoutInflater = onGetLayoutInflater(savedInstanceState); |
| mLayoutInflater = layoutInflater; |
| return mLayoutInflater; |
| } |
| |
| /** |
| * Override {@link #onGetLayoutInflater(Bundle)} when you need to change the |
| * LayoutInflater or call {@link #getLayoutInflater()} when you want to |
| * retrieve the current LayoutInflater. |
| * |
| * @hide |
| * @deprecated Override {@link #onGetLayoutInflater(Bundle)} or call |
| * {@link #getLayoutInflater()} instead of this method. |
| */ |
| @Deprecated |
| @NonNull |
| @RestrictTo(LIBRARY_GROUP) |
| public LayoutInflater getLayoutInflater(@Nullable Bundle savedFragmentState) { |
| if (mHost == null) { |
| throw new IllegalStateException("onGetLayoutInflater() cannot be executed until the " |
| + "Fragment is attached to the FragmentManager."); |
| } |
| LayoutInflater result = mHost.onGetLayoutInflater(); |
| getChildFragmentManager(); // Init if needed; use raw implementation below. |
| LayoutInflaterCompat.setFactory2(result, mChildFragmentManager.getLayoutInflaterFactory()); |
| return result; |
| } |
| |
| /** |
| * Called when a fragment is being created as part of a view layout |
| * inflation, typically from setting the content view of an activity. This |
| * may be called immediately after the fragment is created from a <fragment> |
| * tag in a layout file. Note this is <em>before</em> the fragment's |
| * {@link #onAttach(Activity)} has been called; all you should do here is |
| * parse the attributes and save them away. |
| * |
| * <p>This is called every time the fragment is inflated, even if it is |
| * being inflated into a new instance with saved state. It typically makes |
| * sense to re-parse the parameters each time, to allow them to change with |
| * different configurations.</p> |
| * |
| * <p>Here is a typical implementation of a fragment that can take parameters |
| * both through attributes supplied here as well from {@link #getArguments()}:</p> |
| * |
| * {@sample frameworks/support/samples/Support4Demos/src/main/java/com/example/android/supportv4/app/FragmentArgumentsSupport.java |
| * fragment} |
| * |
| * <p>Note that parsing the XML attributes uses a "styleable" resource. The |
| * declaration for the styleable used here is:</p> |
| * |
| * {@sample frameworks/support/samples/Support4Demos/src/main/res/values/attrs.xml fragment_arguments} |
| * |
| * <p>The fragment can then be declared within its activity's content layout |
| * through a tag like this:</p> |
| * |
| * {@sample frameworks/support/samples/Support4Demos/src/main/res/layout/fragment_arguments_support.xml from_attributes} |
| * |
| * <p>This fragment can also be created dynamically from arguments given |
| * at runtime in the arguments Bundle; here is an example of doing so at |
| * creation of the containing activity:</p> |
| * |
| * {@sample frameworks/support/samples/Support4Demos/src/main/java/com/example/android/supportv4/app/FragmentArgumentsSupport.java |
| * create} |
| * |
| * @param context The Activity that is inflating this fragment. |
| * @param attrs The attributes at the tag where the fragment is |
| * being created. |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| */ |
| @CallSuper |
| public void onInflate(@NonNull Context context, @NonNull AttributeSet attrs, |
| @Nullable Bundle savedInstanceState) { |
| mCalled = true; |
| final Activity hostActivity = mHost == null ? null : mHost.getActivity(); |
| if (hostActivity != null) { |
| mCalled = false; |
| onInflate(hostActivity, attrs, savedInstanceState); |
| } |
| } |
| |
| /** |
| * Called when a fragment is being created as part of a view layout |
| * inflation, typically from setting the content view of an activity. |
| * |
| * @deprecated See {@link #onInflate(Context, AttributeSet, Bundle)}. |
| */ |
| @Deprecated |
| @CallSuper |
| public void onInflate(@NonNull Activity activity, @NonNull AttributeSet attrs, |
| @Nullable Bundle savedInstanceState) { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when a fragment is attached as a child of this fragment. |
| * |
| * <p>This is called after the attached fragment's <code>onAttach</code> and before |
| * the attached fragment's <code>onCreate</code> if the fragment has not yet had a previous |
| * call to <code>onCreate</code>.</p> |
| * |
| * @param childFragment child fragment being attached |
| */ |
| public void onAttachFragment(@NonNull Fragment childFragment) { |
| } |
| |
| /** |
| * Called when a fragment is first attached to its context. |
| * {@link #onCreate(Bundle)} will be called after this. |
| */ |
| @CallSuper |
| public void onAttach(@NonNull Context context) { |
| mCalled = true; |
| final Activity hostActivity = mHost == null ? null : mHost.getActivity(); |
| if (hostActivity != null) { |
| mCalled = false; |
| onAttach(hostActivity); |
| } |
| } |
| |
| /** |
| * Called when a fragment is first attached to its activity. |
| * {@link #onCreate(Bundle)} will be called after this. |
| * |
| * @deprecated See {@link #onAttach(Context)}. |
| */ |
| @Deprecated |
| @CallSuper |
| public void onAttach(@NonNull Activity activity) { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when a fragment loads an animation. Note that if |
| * {@link FragmentTransaction#setCustomAnimations(int, int)} was called with |
| * {@link Animator} resources instead of {@link Animation} resources, {@code nextAnim} |
| * will be an animator resource. |
| * |
| * @param transit The value set in {@link FragmentTransaction#setTransition(int)} or 0 if not |
| * set. |
| * @param enter {@code true} when the fragment is added/attached/shown or {@code false} when |
| * the fragment is removed/detached/hidden. |
| * @param nextAnim The resource set in |
| * {@link FragmentTransaction#setCustomAnimations(int, int)}, |
| * {@link FragmentTransaction#setCustomAnimations(int, int, int, int)}, or |
| * 0 if neither was called. The value will depend on the current operation. |
| */ |
| @Nullable |
| public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) { |
| return null; |
| } |
| |
| /** |
| * Called when a fragment loads an animator. This will be called when |
| * {@link #onCreateAnimation(int, boolean, int)} returns null. Note that if |
| * {@link FragmentTransaction#setCustomAnimations(int, int)} was called with |
| * {@link Animation} resources instead of {@link Animator} resources, {@code nextAnim} |
| * will be an animation resource. |
| * |
| * @param transit The value set in {@link FragmentTransaction#setTransition(int)} or 0 if not |
| * set. |
| * @param enter {@code true} when the fragment is added/attached/shown or {@code false} when |
| * the fragment is removed/detached/hidden. |
| * @param nextAnim The resource set in |
| * {@link FragmentTransaction#setCustomAnimations(int, int)}, |
| * {@link FragmentTransaction#setCustomAnimations(int, int, int, int)}, or |
| * 0 if neither was called. The value will depend on the current operation. |
| */ |
| @Nullable |
| public Animator onCreateAnimator(int transit, boolean enter, int nextAnim) { |
| return null; |
| } |
| |
| /** |
| * Called to do initial creation of a fragment. This is called after |
| * {@link #onAttach(Activity)} and before |
| * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}. |
| * |
| * <p>Note that this can be called while the fragment's activity is |
| * still in the process of being created. As such, you can not rely |
| * on things like the activity's content view hierarchy being initialized |
| * at this point. If you want to do work once the activity itself is |
| * created, see {@link #onActivityCreated(Bundle)}. |
| * |
| * <p>Any restored child fragments will be created before the base |
| * <code>Fragment.onCreate</code> method returns.</p> |
| * |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| */ |
| @CallSuper |
| public void onCreate(@Nullable Bundle savedInstanceState) { |
| mCalled = true; |
| mSavedStateRegistryController.performRestore(savedInstanceState); |
| restoreChildFragmentState(savedInstanceState); |
| if (mChildFragmentManager != null |
| && !mChildFragmentManager.isStateAtLeast(Fragment.CREATED)) { |
| mChildFragmentManager.dispatchCreate(); |
| } |
| } |
| |
| /** |
| * Restore the state of the child FragmentManager. Called by either |
| * {@link #onCreate(Bundle)} for non-retained instance fragments or by |
| * {@link FragmentManagerImpl#moveToState(Fragment, int, int, int, boolean)} |
| * for retained instance fragments. |
| * |
| * <p><strong>Postcondition:</strong> if there were child fragments to restore, |
| * the child FragmentManager will be instantiated and brought to the {@link #CREATED} state. |
| * </p> |
| * |
| * @param savedInstanceState the savedInstanceState potentially containing fragment info |
| */ |
| void restoreChildFragmentState(@Nullable Bundle savedInstanceState) { |
| if (savedInstanceState != null) { |
| Parcelable p = savedInstanceState.getParcelable( |
| FragmentActivity.FRAGMENTS_TAG); |
| if (p != null) { |
| if (mChildFragmentManager == null) { |
| instantiateChildFragmentManager(); |
| } |
| mChildFragmentManager.restoreSaveState(p); |
| mChildFragmentManager.dispatchCreate(); |
| } |
| } |
| } |
| |
| /** |
| * Called to have the fragment instantiate its user interface view. |
| * This is optional, and non-graphical fragments can return null. This will be called between |
| * {@link #onCreate(Bundle)} and {@link #onActivityCreated(Bundle)}. |
| * <p>The default implementation looks for an {@link ContentView} annotation, inflating |
| * and returning that layout. If the annotation is not found or has an invalid layout resource |
| * id, this method returns null. |
| * |
| * <p>It is recommended to <strong>only</strong> inflate the layout in this method and move |
| * logic that operates on the returned View to {@link #onViewCreated(View, Bundle)}. |
| * |
| * <p>If you return a View from here, you will later be called in |
| * {@link #onDestroyView} when the view is being released. |
| * |
| * @param inflater The LayoutInflater object that can be used to inflate |
| * any views in the fragment, |
| * @param container If non-null, this is the parent view that the fragment's |
| * UI should be attached to. The fragment should not add the view itself, |
| * but this can be used to generate the LayoutParams of the view. |
| * @param savedInstanceState If non-null, this fragment is being re-constructed |
| * from a previous saved state as given here. |
| * |
| * @return Return the View for the fragment's UI, or null. |
| */ |
| @Nullable |
| public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, |
| @Nullable Bundle savedInstanceState) { |
| Class<? extends Fragment> clazz = getClass(); |
| if (!sAnnotationIds.containsKey(clazz)) { |
| ContentView annotation = clazz.getAnnotation(ContentView.class); |
| if (annotation != null) { |
| sAnnotationIds.put(clazz, annotation.value()); |
| } else { |
| sAnnotationIds.put(clazz, null); |
| } |
| } |
| Integer layoutId = sAnnotationIds.get(clazz); |
| if (layoutId != null && layoutId != 0) { |
| return inflater.inflate(layoutId, container, false); |
| } |
| return null; |
| } |
| |
| /** |
| * Called immediately after {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} |
| * has returned, but before any saved state has been restored in to the view. |
| * This gives subclasses a chance to initialize themselves once |
| * they know their view hierarchy has been completely created. The fragment's |
| * view hierarchy is not however attached to its parent at this point. |
| * @param view The View returned by {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}. |
| * @param savedInstanceState If non-null, this fragment is being re-constructed |
| * from a previous saved state as given here. |
| */ |
| public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) { |
| } |
| |
| /** |
| * Get the root view for the fragment's layout (the one returned by {@link #onCreateView}), |
| * if provided. |
| * |
| * @return The fragment's root view, or null if it has no layout. |
| */ |
| @Nullable |
| public View getView() { |
| return mView; |
| } |
| |
| /** |
| * Get the root view for the fragment's layout (the one returned by {@link #onCreateView}). |
| * |
| * @throws IllegalStateException if no view was returned by {@link #onCreateView}. |
| * @see #getView() |
| */ |
| @NonNull |
| public final View requireView() { |
| View view = getView(); |
| if (view == null) { |
| throw new IllegalStateException("Fragment " + this + " did not return a View from" |
| + " onCreateView() or this was called before onCreateView()."); |
| } |
| return view; |
| } |
| |
| /** |
| * Called when the fragment's activity has been created and this |
| * fragment's view hierarchy instantiated. It can be used to do final |
| * initialization once these pieces are in place, such as retrieving |
| * views or restoring state. It is also useful for fragments that use |
| * {@link #setRetainInstance(boolean)} to retain their instance, |
| * as this callback tells the fragment when it is fully associated with |
| * the new activity instance. This is called after {@link #onCreateView} |
| * and before {@link #onViewStateRestored(Bundle)}. |
| * |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| */ |
| @CallSuper |
| public void onActivityCreated(@Nullable Bundle savedInstanceState) { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when all saved state has been restored into the view hierarchy |
| * of the fragment. This can be used to do initialization based on saved |
| * state that you are letting the view hierarchy track itself, such as |
| * whether check box widgets are currently checked. This is called |
| * after {@link #onActivityCreated(Bundle)} and before |
| * {@link #onStart()}. |
| * |
| * @param savedInstanceState If the fragment is being re-created from |
| * a previous saved state, this is the state. |
| */ |
| @CallSuper |
| public void onViewStateRestored(@Nullable Bundle savedInstanceState) { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the Fragment is visible to the user. This is generally |
| * tied to {@link Activity#onStart() Activity.onStart} of the containing |
| * Activity's lifecycle. |
| */ |
| @CallSuper |
| public void onStart() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the fragment is visible to the user and actively running. |
| * This is generally |
| * tied to {@link Activity#onResume() Activity.onResume} of the containing |
| * Activity's lifecycle. |
| */ |
| @CallSuper |
| public void onResume() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called to ask the fragment to save its current dynamic state, so it |
| * can later be reconstructed in a new instance of its process is |
| * restarted. If a new instance of the fragment later needs to be |
| * created, the data you place in the Bundle here will be available |
| * in the Bundle given to {@link #onCreate(Bundle)}, |
| * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}, and |
| * {@link #onActivityCreated(Bundle)}. |
| * |
| * <p>This corresponds to {@link Activity#onSaveInstanceState(Bundle) |
| * Activity.onSaveInstanceState(Bundle)} and most of the discussion there |
| * applies here as well. Note however: <em>this method may be called |
| * at any time before {@link #onDestroy()}</em>. There are many situations |
| * where a fragment may be mostly torn down (such as when placed on the |
| * back stack with no UI showing), but its state will not be saved until |
| * its owning activity actually needs to save its state. |
| * |
| * @param outState Bundle in which to place your saved state. |
| */ |
| public void onSaveInstanceState(@NonNull Bundle outState) { |
| } |
| |
| /** |
| * Called when the Fragment's activity changes from fullscreen mode to multi-window mode and |
| * visa-versa. This is generally tied to {@link Activity#onMultiWindowModeChanged} of the |
| * containing Activity. |
| * |
| * @param isInMultiWindowMode True if the activity is in multi-window mode. |
| */ |
| public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { |
| } |
| |
| /** |
| * Called by the system when the activity changes to and from picture-in-picture mode. This is |
| * generally tied to {@link Activity#onPictureInPictureModeChanged} of the containing Activity. |
| * |
| * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. |
| */ |
| public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { |
| } |
| |
| @Override |
| @CallSuper |
| public void onConfigurationChanged(@NonNull Configuration newConfig) { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the Fragment is no longer resumed. This is generally |
| * tied to {@link Activity#onPause() Activity.onPause} of the containing |
| * Activity's lifecycle. |
| */ |
| @CallSuper |
| public void onPause() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the Fragment is no longer started. This is generally |
| * tied to {@link Activity#onStop() Activity.onStop} of the containing |
| * Activity's lifecycle. |
| */ |
| @CallSuper |
| public void onStop() { |
| mCalled = true; |
| } |
| |
| @Override |
| @CallSuper |
| public void onLowMemory() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the view previously created by {@link #onCreateView} has |
| * been detached from the fragment. The next time the fragment needs |
| * to be displayed, a new view will be created. This is called |
| * after {@link #onStop()} and before {@link #onDestroy()}. It is called |
| * <em>regardless</em> of whether {@link #onCreateView} returned a |
| * non-null view. Internally it is called after the view's state has |
| * been saved but before it has been removed from its parent. |
| */ |
| @CallSuper |
| public void onDestroyView() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called when the fragment is no longer in use. This is called |
| * after {@link #onStop()} and before {@link #onDetach()}. |
| */ |
| @CallSuper |
| public void onDestroy() { |
| mCalled = true; |
| } |
| |
| /** |
| * Called by the fragment manager once this fragment has been removed, |
| * so that we don't have any left-over state if the application decides |
| * to re-use the instance. This only clears state that the framework |
| * internally manages, not things the application sets. |
| */ |
| void initState() { |
| initLifecycle(); |
| mSavedStateRegistryController = new SavedStateRegistryController(); |
| mWho = UUID.randomUUID().toString(); |
| mAdded = false; |
| mRemoving = false; |
| mFromLayout = false; |
| mInLayout = false; |
| mRestored = false; |
| mBackStackNesting = 0; |
| mFragmentManager = null; |
| mChildFragmentManager = null; |
| mHost = null; |
| mFragmentId = 0; |
| mContainerId = 0; |
| mTag = null; |
| mHidden = false; |
| mDetached = false; |
| } |
| |
| /** |
| * Called when the fragment is no longer attached to its activity. This |
| * is called after {@link #onDestroy()}. |
| */ |
| @CallSuper |
| public void onDetach() { |
| mCalled = true; |
| } |
| |
| /** |
| * Initialize the contents of the Fragment host's standard options menu. You |
| * should place your menu items in to <var>menu</var>. For this method |
| * to be called, you must have first called {@link #setHasOptionsMenu}. See |
| * {@link Activity#onCreateOptionsMenu(Menu) Activity.onCreateOptionsMenu} |
| * for more information. |
| * |
| * @param menu The options menu in which you place your items. |
| * |
| * @see #setHasOptionsMenu |
| * @see #onPrepareOptionsMenu |
| * @see #onOptionsItemSelected |
| */ |
| public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) { |
| } |
| |
| /** |
| * Prepare the Fragment host's standard options menu to be displayed. This is |
| * called right before the menu is shown, every time it is shown. You can |
| * use this method to efficiently enable/disable items or otherwise |
| * dynamically modify the contents. See |
| * {@link Activity#onPrepareOptionsMenu(Menu) Activity.onPrepareOptionsMenu} |
| * for more information. |
| * |
| * @param menu The options menu as last shown or first initialized by |
| * onCreateOptionsMenu(). |
| * |
| * @see #setHasOptionsMenu |
| * @see #onCreateOptionsMenu |
| */ |
| public void onPrepareOptionsMenu(@NonNull Menu menu) { |
| } |
| |
| /** |
| * Called when this fragment's option menu items are no longer being |
| * included in the overall options menu. Receiving this call means that |
| * the menu needed to be rebuilt, but this fragment's items were not |
| * included in the newly built menu (its {@link #onCreateOptionsMenu(Menu, MenuInflater)} |
| * was not called). |
| */ |
| public void onDestroyOptionsMenu() { |
| } |
| |
| /** |
| * This hook is called whenever an item in your options menu is selected. |
| * The default implementation simply returns false to have the normal |
| * processing happen (calling the item's Runnable or sending a message to |
| * its Handler as appropriate). You can use this method for any items |
| * for which you would like to do processing without those other |
| * facilities. |
| * |
| * <p>Derived classes should call through to the base class for it to |
| * perform the default menu handling. |
| * |
| * @param item The menu item that was selected. |
| * |
| * @return boolean Return false to allow normal menu processing to |
| * proceed, true to consume it here. |
| * |
| * @see #onCreateOptionsMenu |
| */ |
| public boolean onOptionsItemSelected(@NonNull MenuItem item) { |
| return false; |
| } |
| |
| /** |
| * This hook is called whenever the options menu is being closed (either by the user canceling |
| * the menu with the back/menu button, or when an item is selected). |
| * |
| * @param menu The options menu as last shown or first initialized by |
| * onCreateOptionsMenu(). |
| */ |
| public void onOptionsMenuClosed(@NonNull Menu menu) { |
| } |
| |
| /** |
| * Called when a context menu for the {@code view} is about to be shown. |
| * Unlike {@link #onCreateOptionsMenu}, this will be called every |
| * time the context menu is about to be shown and should be populated for |
| * the view (or item inside the view for {@link AdapterView} subclasses, |
| * this can be found in the {@code menuInfo})). |
| * <p> |
| * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an |
| * item has been selected. |
| * <p> |
| * The default implementation calls up to |
| * {@link Activity#onCreateContextMenu Activity.onCreateContextMenu}, though |
| * you can not call this implementation if you don't want that behavior. |
| * <p> |
| * It is not safe to hold onto the context menu after this method returns. |
| * {@inheritDoc} |
| */ |
| @Override |
| public void onCreateContextMenu(@NonNull ContextMenu menu, @NonNull View v, |
| @Nullable ContextMenuInfo menuInfo) { |
| requireActivity().onCreateContextMenu(menu, v, menuInfo); |
| } |
| |
| /** |
| * Registers a context menu to be shown for the given view (multiple views |
| * can show the context menu). This method will set the |
| * {@link OnCreateContextMenuListener} on the view to this fragment, so |
| * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be |
| * called when it is time to show the context menu. |
| * |
| * @see #unregisterForContextMenu(View) |
| * @param view The view that should show a context menu. |
| */ |
| public void registerForContextMenu(@NonNull View view) { |
| view.setOnCreateContextMenuListener(this); |
| } |
| |
| /** |
| * Prevents a context menu to be shown for the given view. This method will |
| * remove the {@link OnCreateContextMenuListener} on the view. |
| * |
| * @see #registerForContextMenu(View) |
| * @param view The view that should stop showing a context menu. |
| */ |
| public void unregisterForContextMenu(@NonNull View view) { |
| view.setOnCreateContextMenuListener(null); |
| } |
| |
| /** |
| * This hook is called whenever an item in a context menu is selected. The |
| * default implementation simply returns false to have the normal processing |
| * happen (calling the item's Runnable or sending a message to its Handler |
| * as appropriate). You can use this method for any items for which you |
| * would like to do processing without those other facilities. |
| * <p> |
| * Use {@link MenuItem#getMenuInfo()} to get extra information set by the |
| * View that added this menu item. |
| * <p> |
| * Derived classes should call through to the base class for it to perform |
| * the default menu handling. |
| * |
| * @param item The context menu item that was selected. |
| * @return boolean Return false to allow normal context menu processing to |
| * proceed, true to consume it here. |
| */ |
| public boolean onContextItemSelected(@NonNull MenuItem item) { |
| return false; |
| } |
| |
| /** |
| * When custom transitions are used with Fragments, the enter transition callback |
| * is called when this Fragment is attached or detached when not popping the back stack. |
| * |
| * @param callback Used to manipulate the shared element transitions on this Fragment |
| * when added not as a pop from the back stack. |
| */ |
| public void setEnterSharedElementCallback(@Nullable SharedElementCallback callback) { |
| ensureAnimationInfo().mEnterTransitionCallback = callback; |
| } |
| |
| /** |
| * When custom transitions are used with Fragments, the exit transition callback |
| * is called when this Fragment is attached or detached when popping the back stack. |
| * |
| * @param callback Used to manipulate the shared element transitions on this Fragment |
| * when added as a pop from the back stack. |
| */ |
| public void setExitSharedElementCallback(@Nullable SharedElementCallback callback) { |
| ensureAnimationInfo().mExitTransitionCallback = callback; |
| } |
| |
| /** |
| * Sets the Transition that will be used to move Views into the initial scene. The entering |
| * Views will be those that are regular Views or ViewGroups that have |
| * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as entering is governed by changing visibility from |
| * {@link View#INVISIBLE} to {@link View#VISIBLE}. If <code>transition</code> is null, |
| * entering Views will remain unaffected. |
| * |
| * @param transition The Transition to use to move Views into the initial Scene. |
| */ |
| public void setEnterTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mEnterTransition = transition; |
| } |
| |
| /** |
| * Returns the Transition that will be used to move Views into the initial scene. The entering |
| * Views will be those that are regular Views or ViewGroups that have |
| * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as entering is governed by changing visibility from |
| * {@link View#INVISIBLE} to {@link View#VISIBLE}. |
| * |
| * @return the Transition to use to move Views into the initial Scene. |
| */ |
| @Nullable |
| public Object getEnterTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mEnterTransition; |
| } |
| |
| /** |
| * Sets the Transition that will be used to move Views out of the scene when the Fragment is |
| * preparing to be removed, hidden, or detached because of popping the back stack. The exiting |
| * Views will be those that are regular Views or ViewGroups that have |
| * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as entering is governed by changing visibility from |
| * {@link View#VISIBLE} to {@link View#INVISIBLE}. If <code>transition</code> is null, |
| * entering Views will remain unaffected. If nothing is set, the default will be to |
| * use the same value as set in {@link #setEnterTransition(Object)}. |
| * |
| * @param transition The Transition to use to move Views out of the Scene when the Fragment |
| * is preparing to close. <code>transition</code> must be an |
| * {@link android.transition.Transition android.transition.Transition} or |
| * {@link androidx.transition.Transition androidx.transition.Transition}. |
| */ |
| public void setReturnTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mReturnTransition = transition; |
| } |
| |
| /** |
| * Returns the Transition that will be used to move Views out of the scene when the Fragment is |
| * preparing to be removed, hidden, or detached because of popping the back stack. The exiting |
| * Views will be those that are regular Views or ViewGroups that have |
| * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as entering is governed by changing visibility from |
| * {@link View#VISIBLE} to {@link View#INVISIBLE}. If <code>transition</code> is null, |
| * entering Views will remain unaffected. |
| * |
| * @return the Transition to use to move Views out of the Scene when the Fragment |
| * is preparing to close. |
| */ |
| @Nullable |
| public Object getReturnTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mReturnTransition == USE_DEFAULT_TRANSITION ? getEnterTransition() |
| : mAnimationInfo.mReturnTransition; |
| } |
| |
| /** |
| * Sets the Transition that will be used to move Views out of the scene when the |
| * fragment is removed, hidden, or detached when not popping the back stack. |
| * The exiting Views will be those that are regular Views or ViewGroups that |
| * have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as exiting is governed by changing visibility |
| * from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, the views will |
| * remain unaffected. |
| * |
| * @param transition The Transition to use to move Views out of the Scene when the Fragment |
| * is being closed not due to popping the back stack. <code>transition</code> |
| * must be an |
| * {@link android.transition.Transition android.transition.Transition} or |
| * {@link androidx.transition.Transition androidx.transition.Transition}. |
| */ |
| public void setExitTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mExitTransition = transition; |
| } |
| |
| /** |
| * Returns the Transition that will be used to move Views out of the scene when the |
| * fragment is removed, hidden, or detached when not popping the back stack. |
| * The exiting Views will be those that are regular Views or ViewGroups that |
| * have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend |
| * {@link android.transition.Visibility} as exiting is governed by changing visibility |
| * from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, the views will |
| * remain unaffected. |
| * |
| * @return the Transition to use to move Views out of the Scene when the Fragment |
| * is being closed not due to popping the back stack. |
| */ |
| @Nullable |
| public Object getExitTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mExitTransition; |
| } |
| |
| /** |
| * Sets the Transition that will be used to move Views in to the scene when returning due |
| * to popping a back stack. The entering Views will be those that are regular Views |
| * or ViewGroups that have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions |
| * will extend {@link android.transition.Visibility} as exiting is governed by changing |
| * visibility from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, |
| * the views will remain unaffected. If nothing is set, the default will be to use the same |
| * transition as {@link #setExitTransition(Object)}. |
| * |
| * @param transition The Transition to use to move Views into the scene when reentering from a |
| * previously-started Activity. <code>transition</code> |
| * must be an |
| * {@link android.transition.Transition android.transition.Transition} or |
| * {@link androidx.transition.Transition androidx.transition.Transition}. |
| */ |
| public void setReenterTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mReenterTransition = transition; |
| } |
| |
| /** |
| * Returns the Transition that will be used to move Views in to the scene when returning due |
| * to popping a back stack. The entering Views will be those that are regular Views |
| * or ViewGroups that have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions |
| * will extend {@link android.transition.Visibility} as exiting is governed by changing |
| * visibility from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, |
| * the views will remain unaffected. If nothing is set, the default will be to use the same |
| * transition as {@link #setExitTransition(Object)}. |
| * |
| * @return the Transition to use to move Views into the scene when reentering from a |
| * previously-started Activity. |
| */ |
| @Nullable |
| public Object getReenterTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mReenterTransition == USE_DEFAULT_TRANSITION ? getExitTransition() |
| : mAnimationInfo.mReenterTransition; |
| } |
| |
| /** |
| * Sets the Transition that will be used for shared elements transferred into the content |
| * Scene. Typical Transitions will affect size and location, such as |
| * {@link android.transition.ChangeBounds}. A null |
| * value will cause transferred shared elements to blink to the final position. |
| * |
| * @param transition The Transition to use for shared elements transferred into the content |
| * Scene. <code>transition</code> must be an |
| * {@link android.transition.Transition android.transition.Transition} or |
| * {@link androidx.transition.Transition androidx.transition.Transition}. |
| */ |
| public void setSharedElementEnterTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mSharedElementEnterTransition = transition; |
| } |
| |
| /** |
| * Returns the Transition that will be used for shared elements transferred into the content |
| * Scene. Typical Transitions will affect size and location, such as |
| * {@link android.transition.ChangeBounds}. A null |
| * value will cause transferred shared elements to blink to the final position. |
| * |
| * @return The Transition to use for shared elements transferred into the content |
| * Scene. |
| */ |
| @Nullable |
| public Object getSharedElementEnterTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mSharedElementEnterTransition; |
| } |
| |
| /** |
| * Sets the Transition that will be used for shared elements transferred back during a |
| * pop of the back stack. This Transition acts in the leaving Fragment. |
| * Typical Transitions will affect size and location, such as |
| * {@link android.transition.ChangeBounds}. A null |
| * value will cause transferred shared elements to blink to the final position. |
| * If no value is set, the default will be to use the same value as |
| * {@link #setSharedElementEnterTransition(Object)}. |
| * |
| * @param transition The Transition to use for shared elements transferred out of the content |
| * Scene. <code>transition</code> must be an |
| * {@link android.transition.Transition android.transition.Transition} or |
| * {@link androidx.transition.Transition androidx.transition.Transition}. |
| */ |
| public void setSharedElementReturnTransition(@Nullable Object transition) { |
| ensureAnimationInfo().mSharedElementReturnTransition = transition; |
| } |
| |
| /** |
| * Return the Transition that will be used for shared elements transferred back during a |
| * pop of the back stack. This Transition acts in the leaving Fragment. |
| * Typical Transitions will affect size and location, such as |
| * {@link android.transition.ChangeBounds}. A null |
| * value will cause transferred shared elements to blink to the final position. |
| * If no value is set, the default will be to use the same value as |
| * {@link #setSharedElementEnterTransition(Object)}. |
| * |
| * @return The Transition to use for shared elements transferred out of the content |
| * Scene. |
| */ |
| @Nullable |
| public Object getSharedElementReturnTransition() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mSharedElementReturnTransition == USE_DEFAULT_TRANSITION |
| ? getSharedElementEnterTransition() |
| : mAnimationInfo.mSharedElementReturnTransition; |
| } |
| |
| /** |
| * Sets whether the the exit transition and enter transition overlap or not. |
| * When true, the enter transition will start as soon as possible. When false, the |
| * enter transition will wait until the exit transition completes before starting. |
| * |
| * @param allow true to start the enter transition when possible or false to |
| * wait until the exiting transition completes. |
| */ |
| public void setAllowEnterTransitionOverlap(boolean allow) { |
| ensureAnimationInfo().mAllowEnterTransitionOverlap = allow; |
| } |
| |
| /** |
| * Returns whether the the exit transition and enter transition overlap or not. |
| * When true, the enter transition will start as soon as possible. When false, the |
| * enter transition will wait until the exit transition completes before starting. |
| * |
| * @return true when the enter transition should start as soon as possible or false to |
| * when it should wait until the exiting transition completes. |
| */ |
| public boolean getAllowEnterTransitionOverlap() { |
| return (mAnimationInfo == null || mAnimationInfo.mAllowEnterTransitionOverlap == null) |
| ? true : mAnimationInfo.mAllowEnterTransitionOverlap; |
| } |
| |
| /** |
| * Sets whether the the return transition and reenter transition overlap or not. |
| * When true, the reenter transition will start as soon as possible. When false, the |
| * reenter transition will wait until the return transition completes before starting. |
| * |
| * @param allow true to start the reenter transition when possible or false to wait until the |
| * return transition completes. |
| */ |
| public void setAllowReturnTransitionOverlap(boolean allow) { |
| ensureAnimationInfo().mAllowReturnTransitionOverlap = allow; |
| } |
| |
| /** |
| * Returns whether the the return transition and reenter transition overlap or not. |
| * When true, the reenter transition will start as soon as possible. When false, the |
| * reenter transition will wait until the return transition completes before starting. |
| * |
| * @return true to start the reenter transition when possible or false to wait until the |
| * return transition completes. |
| */ |
| public boolean getAllowReturnTransitionOverlap() { |
| return (mAnimationInfo == null || mAnimationInfo.mAllowReturnTransitionOverlap == null) |
| ? true : mAnimationInfo.mAllowReturnTransitionOverlap; |
| } |
| |
| /** |
| * Postpone the entering Fragment transition until {@link #startPostponedEnterTransition()} |
| * or {@link FragmentManager#executePendingTransactions()} has been called. |
| * <p> |
| * This method gives the Fragment the ability to delay Fragment animations |
| * until all data is loaded. Until then, the added, shown, and |
| * attached Fragments will be INVISIBLE and removed, hidden, and detached Fragments won't |
| * be have their Views removed. The transaction runs when all postponed added Fragments in the |
| * transaction have called {@link #startPostponedEnterTransition()}. |
| * <p> |
| * This method should be called before being added to the FragmentTransaction or |
| * in {@link #onCreate(Bundle)}, {@link #onAttach(Context)}, or |
| * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}}. |
| * {@link #startPostponedEnterTransition()} must be called to allow the Fragment to |
| * start the transitions. |
| * <p> |
| * When a FragmentTransaction is started that may affect a postponed FragmentTransaction, |
| * based on which containers are in their operations, the postponed FragmentTransaction |
| * will have its start triggered. The early triggering may result in faulty or nonexistent |
| * animations in the postponed transaction. FragmentTransactions that operate only on |
| * independent containers will not interfere with each other's postponement. |
| * <p> |
| * Calling postponeEnterTransition on Fragments with a null View will not postpone the |
| * transition. Likewise, postponement only works if |
| * {@link FragmentTransaction#setReorderingAllowed(boolean) FragmentTransaction reordering} is |
| * enabled. |
| * |
| * @see Activity#postponeEnterTransition() |
| * @see FragmentTransaction#setReorderingAllowed(boolean) |
| */ |
| public void postponeEnterTransition() { |
| ensureAnimationInfo().mEnterTransitionPostponed = true; |
| } |
| |
| /** |
| * Begin postponed transitions after {@link #postponeEnterTransition()} was called. |
| * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() |
| * or {@link FragmentManager#executePendingTransactions()} to complete the FragmentTransaction. |
| * If postponement was interrupted with {@link FragmentManager#executePendingTransactions()}, |
| * before {@code startPostponedEnterTransition()}, animations may not run or may execute |
| * improperly. |
| * |
| * @see Activity#startPostponedEnterTransition() |
| */ |
| public void startPostponedEnterTransition() { |
| if (mFragmentManager == null || mFragmentManager.mHost == null) { |
| ensureAnimationInfo().mEnterTransitionPostponed = false; |
| } else if (Looper.myLooper() != mFragmentManager.mHost.getHandler().getLooper()) { |
| mFragmentManager.mHost.getHandler().postAtFrontOfQueue(new Runnable() { |
| @Override |
| public void run() { |
| callStartTransitionListener(); |
| } |
| }); |
| } else { |
| callStartTransitionListener(); |
| } |
| } |
| |
| /** |
| * Calls the start transition listener. This must be called on the UI thread. |
| */ |
| @SuppressWarnings("WeakerAccess") /* synthetic access */ |
| void callStartTransitionListener() { |
| final OnStartEnterTransitionListener listener; |
| if (mAnimationInfo == null) { |
| listener = null; |
| } else { |
| mAnimationInfo.mEnterTransitionPostponed = false; |
| listener = mAnimationInfo.mStartEnterTransitionListener; |
| mAnimationInfo.mStartEnterTransitionListener = null; |
| } |
| if (listener != null) { |
| listener.onStartEnterTransition(); |
| } |
| } |
| |
| /** |
| * Print the Fragments'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 The PrintWriter to which you should dump your state. This will be |
| * closed for you after you return. |
| * @param args additional arguments to the dump request. |
| */ |
| public void dump(@NonNull String prefix, @Nullable FileDescriptor fd, |
| @NonNull PrintWriter writer, @Nullable String[] args) { |
| writer.print(prefix); writer.print("mFragmentId=#"); |
| writer.print(Integer.toHexString(mFragmentId)); |
| writer.print(" mContainerId=#"); |
| writer.print(Integer.toHexString(mContainerId)); |
| writer.print(" mTag="); writer.println(mTag); |
| writer.print(prefix); writer.print("mState="); writer.print(mState); |
| writer.print(" mWho="); writer.print(mWho); |
| writer.print(" mBackStackNesting="); writer.println(mBackStackNesting); |
| writer.print(prefix); writer.print("mAdded="); writer.print(mAdded); |
| writer.print(" mRemoving="); writer.print(mRemoving); |
| writer.print(" mFromLayout="); writer.print(mFromLayout); |
| writer.print(" mInLayout="); writer.println(mInLayout); |
| writer.print(prefix); writer.print("mHidden="); writer.print(mHidden); |
| writer.print(" mDetached="); writer.print(mDetached); |
| writer.print(" mMenuVisible="); writer.print(mMenuVisible); |
| writer.print(" mHasMenu="); writer.println(mHasMenu); |
| writer.print(prefix); writer.print("mRetainInstance="); writer.print(mRetainInstance); |
| writer.print(" mUserVisibleHint="); writer.println(mUserVisibleHint); |
| if (mFragmentManager != null) { |
| writer.print(prefix); writer.print("mFragmentManager="); |
| writer.println(mFragmentManager); |
| } |
| if (mHost != null) { |
| writer.print(prefix); writer.print("mHost="); |
| writer.println(mHost); |
| } |
| if (mParentFragment != null) { |
| writer.print(prefix); writer.print("mParentFragment="); |
| writer.println(mParentFragment); |
| } |
| if (mArguments != null) { |
| writer.print(prefix); writer.print("mArguments="); writer.println(mArguments); |
| } |
| if (mSavedFragmentState != null) { |
| writer.print(prefix); writer.print("mSavedFragmentState="); |
| writer.println(mSavedFragmentState); |
| } |
| if (mSavedViewState != null) { |
| writer.print(prefix); writer.print("mSavedViewState="); |
| writer.println(mSavedViewState); |
| } |
| Fragment target = getTargetFragment(); |
| if (target != null) { |
| writer.print(prefix); writer.print("mTarget="); writer.print(target); |
| writer.print(" mTargetRequestCode="); |
| writer.println(mTargetRequestCode); |
| } |
| if (getNextAnim() != 0) { |
| writer.print(prefix); writer.print("mNextAnim="); writer.println(getNextAnim()); |
| } |
| if (mContainer != null) { |
| writer.print(prefix); writer.print("mContainer="); writer.println(mContainer); |
| } |
| if (mView != null) { |
| writer.print(prefix); writer.print("mView="); writer.println(mView); |
| } |
| if (mInnerView != null) { |
| writer.print(prefix); writer.print("mInnerView="); writer.println(mView); |
| } |
| if (getAnimatingAway() != null) { |
| writer.print(prefix); |
| writer.print("mAnimatingAway="); |
| writer.println(getAnimatingAway()); |
| writer.print(prefix); |
| writer.print("mStateAfterAnimating="); |
| writer.println(getStateAfterAnimating()); |
| } |
| if (getContext() != null) { |
| LoaderManager.getInstance(this).dump(prefix, fd, writer, args); |
| } |
| if (mChildFragmentManager != null) { |
| writer.print(prefix); writer.println("Child " + mChildFragmentManager + ":"); |
| mChildFragmentManager.dump(prefix + " ", fd, writer, args); |
| } |
| } |
| |
| @Nullable |
| Fragment findFragmentByWho(@NonNull String who) { |
| if (who.equals(mWho)) { |
| return this; |
| } |
| if (mChildFragmentManager != null) { |
| return mChildFragmentManager.findFragmentByWho(who); |
| } |
| return null; |
| } |
| |
| void instantiateChildFragmentManager() { |
| if (mHost == null) { |
| throw new IllegalStateException("Fragment has not been attached yet."); |
| } |
| mChildFragmentManager = new FragmentManagerImpl(); |
| mChildFragmentManager.attachController(mHost, new FragmentContainer() { |
| @Override |
| @Nullable |
| public View onFindViewById(int id) { |
| if (mView == null) { |
| throw new IllegalStateException("Fragment does not have a view"); |
| } |
| return mView.findViewById(id); |
| } |
| |
| @Override |
| public boolean onHasView() { |
| return (mView != null); |
| } |
| }, this); |
| } |
| |
| void performCreate(Bundle savedInstanceState) { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| } |
| mState = CREATED; |
| mCalled = false; |
| onCreate(savedInstanceState); |
| mIsCreated = true; |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onCreate()"); |
| } |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE); |
| } |
| |
| void performCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, |
| @Nullable Bundle savedInstanceState) { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| } |
| mPerformedCreateView = true; |
| mViewLifecycleOwner = new FragmentViewLifecycleOwner(); |
| mView = onCreateView(inflater, container, savedInstanceState); |
| if (mView != null) { |
| // Initialize the view lifecycle |
| mViewLifecycleOwner.initialize(); |
| // Then inform any Observers of the new LifecycleOwner |
| mViewLifecycleOwnerLiveData.setValue(mViewLifecycleOwner); |
| } else { |
| if (mViewLifecycleOwner.isInitialized()) { |
| throw new IllegalStateException("Called getViewLifecycleOwner() but " |
| + "onCreateView() returned null"); |
| } |
| mViewLifecycleOwner = null; |
| } |
| } |
| |
| void performActivityCreated(Bundle savedInstanceState) { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| } |
| mState = ACTIVITY_CREATED; |
| mCalled = false; |
| onActivityCreated(savedInstanceState); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onActivityCreated()"); |
| } |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchActivityCreated(); |
| } |
| } |
| |
| void performStart() { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| mChildFragmentManager.execPendingActions(); |
| } |
| mState = STARTED; |
| mCalled = false; |
| onStart(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onStart()"); |
| } |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchStart(); |
| } |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START); |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_START); |
| } |
| } |
| |
| void performResume() { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| mChildFragmentManager.execPendingActions(); |
| } |
| mState = RESUMED; |
| mCalled = false; |
| onResume(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onResume()"); |
| } |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchResume(); |
| mChildFragmentManager.execPendingActions(); |
| } |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME); |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_RESUME); |
| } |
| } |
| |
| void noteStateNotSaved() { |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.noteStateNotSaved(); |
| } |
| } |
| |
| void performMultiWindowModeChanged(boolean isInMultiWindowMode) { |
| onMultiWindowModeChanged(isInMultiWindowMode); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchMultiWindowModeChanged(isInMultiWindowMode); |
| } |
| } |
| |
| void performPictureInPictureModeChanged(boolean isInPictureInPictureMode) { |
| onPictureInPictureModeChanged(isInPictureInPictureMode); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchPictureInPictureModeChanged(isInPictureInPictureMode); |
| } |
| } |
| |
| void performConfigurationChanged(@NonNull Configuration newConfig) { |
| onConfigurationChanged(newConfig); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchConfigurationChanged(newConfig); |
| } |
| } |
| |
| void performLowMemory() { |
| onLowMemory(); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchLowMemory(); |
| } |
| } |
| |
| /* |
| void performTrimMemory(int level) { |
| onTrimMemory(level); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchTrimMemory(level); |
| } |
| } |
| */ |
| |
| boolean performCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) { |
| boolean show = false; |
| if (!mHidden) { |
| if (mHasMenu && mMenuVisible) { |
| show = true; |
| onCreateOptionsMenu(menu, inflater); |
| } |
| if (mChildFragmentManager != null) { |
| show |= mChildFragmentManager.dispatchCreateOptionsMenu(menu, inflater); |
| } |
| } |
| return show; |
| } |
| |
| boolean performPrepareOptionsMenu(@NonNull Menu menu) { |
| boolean show = false; |
| if (!mHidden) { |
| if (mHasMenu && mMenuVisible) { |
| show = true; |
| onPrepareOptionsMenu(menu); |
| } |
| if (mChildFragmentManager != null) { |
| show |= mChildFragmentManager.dispatchPrepareOptionsMenu(menu); |
| } |
| } |
| return show; |
| } |
| |
| boolean performOptionsItemSelected(@NonNull MenuItem item) { |
| if (!mHidden) { |
| if (mHasMenu && mMenuVisible) { |
| if (onOptionsItemSelected(item)) { |
| return true; |
| } |
| } |
| if (mChildFragmentManager != null) { |
| if (mChildFragmentManager.dispatchOptionsItemSelected(item)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| boolean performContextItemSelected(@NonNull MenuItem item) { |
| if (!mHidden) { |
| if (onContextItemSelected(item)) { |
| return true; |
| } |
| if (mChildFragmentManager != null) { |
| if (mChildFragmentManager.dispatchContextItemSelected(item)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| void performOptionsMenuClosed(@NonNull Menu menu) { |
| if (!mHidden) { |
| if (mHasMenu && mMenuVisible) { |
| onOptionsMenuClosed(menu); |
| } |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchOptionsMenuClosed(menu); |
| } |
| } |
| } |
| |
| void performSaveInstanceState(Bundle outState) { |
| onSaveInstanceState(outState); |
| mSavedStateRegistryController.performSave(outState); |
| if (mChildFragmentManager != null) { |
| Parcelable p = mChildFragmentManager.saveAllState(); |
| if (p != null) { |
| outState.putParcelable(FragmentActivity.FRAGMENTS_TAG, p); |
| } |
| } |
| } |
| |
| void performPause() { |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE); |
| } |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchPause(); |
| } |
| mState = STARTED; |
| mCalled = false; |
| onPause(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onPause()"); |
| } |
| } |
| |
| void performStop() { |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_STOP); |
| } |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchStop(); |
| } |
| mState = ACTIVITY_CREATED; |
| mCalled = false; |
| onStop(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onStop()"); |
| } |
| } |
| |
| void performDestroyView() { |
| if (mView != null) { |
| mViewLifecycleOwner.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY); |
| } |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchDestroyView(); |
| } |
| mState = CREATED; |
| mCalled = false; |
| onDestroyView(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onDestroyView()"); |
| } |
| // Handles the detach/reattach case where the view hierarchy |
| // is destroyed and recreated and an additional call to |
| // onLoadFinished may be needed to ensure the new view |
| // hierarchy is populated from data from the Loaders |
| LoaderManager.getInstance(this).markForRedelivery(); |
| mPerformedCreateView = false; |
| } |
| |
| void performDestroy() { |
| mLifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY); |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchDestroy(); |
| } |
| mState = INITIALIZING; |
| mCalled = false; |
| mIsCreated = false; |
| onDestroy(); |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onDestroy()"); |
| } |
| mChildFragmentManager = null; |
| } |
| |
| void performDetach() { |
| mCalled = false; |
| onDetach(); |
| mLayoutInflater = null; |
| if (!mCalled) { |
| throw new SuperNotCalledException("Fragment " + this |
| + " did not call through to super.onDetach()"); |
| } |
| |
| // Destroy the child FragmentManager if we still have it here. |
| // This is normally done in performDestroy(), but is done here |
| // specifically if the Fragment is retained. |
| if (mChildFragmentManager != null) { |
| mChildFragmentManager.dispatchDestroy(); |
| mChildFragmentManager = null; |
| } |
| } |
| |
| void setOnStartEnterTransitionListener(OnStartEnterTransitionListener listener) { |
| ensureAnimationInfo(); |
| if (listener == mAnimationInfo.mStartEnterTransitionListener) { |
| return; |
| } |
| if (listener != null && mAnimationInfo.mStartEnterTransitionListener != null) { |
| throw new IllegalStateException("Trying to set a replacement " |
| + "startPostponedEnterTransition on " + this); |
| } |
| if (mAnimationInfo.mEnterTransitionPostponed) { |
| mAnimationInfo.mStartEnterTransitionListener = listener; |
| } |
| if (listener != null) { |
| listener.startListening(); |
| } |
| } |
| |
| private AnimationInfo ensureAnimationInfo() { |
| if (mAnimationInfo == null) { |
| mAnimationInfo = new AnimationInfo(); |
| } |
| return mAnimationInfo; |
| } |
| |
| int getNextAnim() { |
| if (mAnimationInfo == null) { |
| return 0; |
| } |
| return mAnimationInfo.mNextAnim; |
| } |
| |
| void setNextAnim(int animResourceId) { |
| if (mAnimationInfo == null && animResourceId == 0) { |
| return; // no change! |
| } |
| ensureAnimationInfo().mNextAnim = animResourceId; |
| } |
| |
| int getNextTransition() { |
| if (mAnimationInfo == null) { |
| return 0; |
| } |
| return mAnimationInfo.mNextTransition; |
| } |
| |
| void setNextTransition(int nextTransition, int nextTransitionStyle) { |
| if (mAnimationInfo == null && nextTransition == 0 && nextTransitionStyle == 0) { |
| return; // no change! |
| } |
| ensureAnimationInfo(); |
| mAnimationInfo.mNextTransition = nextTransition; |
| mAnimationInfo.mNextTransitionStyle = nextTransitionStyle; |
| } |
| |
| int getNextTransitionStyle() { |
| if (mAnimationInfo == null) { |
| return 0; |
| } |
| return mAnimationInfo.mNextTransitionStyle; |
| } |
| |
| SharedElementCallback getEnterTransitionCallback() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mEnterTransitionCallback; |
| } |
| |
| SharedElementCallback getExitTransitionCallback() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mExitTransitionCallback; |
| } |
| |
| View getAnimatingAway() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mAnimatingAway; |
| } |
| |
| void setAnimatingAway(View view) { |
| ensureAnimationInfo().mAnimatingAway = view; |
| } |
| |
| void setAnimator(Animator animator) { |
| ensureAnimationInfo().mAnimator = animator; |
| } |
| |
| Animator getAnimator() { |
| if (mAnimationInfo == null) { |
| return null; |
| } |
| return mAnimationInfo.mAnimator; |
| } |
| |
| int getStateAfterAnimating() { |
| if (mAnimationInfo == null) { |
| return 0; |
| } |
| return mAnimationInfo.mStateAfterAnimating; |
| } |
| |
| void setStateAfterAnimating(int state) { |
| ensureAnimationInfo().mStateAfterAnimating = state; |
| } |
| |
| boolean isPostponed() { |
| if (mAnimationInfo == null) { |
| return false; |
| } |
| return mAnimationInfo.mEnterTransitionPostponed; |
| } |
| |
| boolean isHideReplaced() { |
| if (mAnimationInfo == null) { |
| return false; |
| } |
| return mAnimationInfo.mIsHideReplaced; |
| } |
| |
| void setHideReplaced(boolean replaced) { |
| ensureAnimationInfo().mIsHideReplaced = replaced; |
| } |
| |
| /** |
| * Used internally to be notified when {@link #startPostponedEnterTransition()} has |
| * been called. This listener will only be called once and then be removed from the |
| * listeners. |
| */ |
| interface OnStartEnterTransitionListener { |
| void onStartEnterTransition(); |
| void startListening(); |
| } |
| |
| /** |
| * Contains all the animation and transition information for a fragment. This will only |
| * be instantiated for Fragments that have Views. |
| */ |
| static class AnimationInfo { |
| // Non-null if the fragment's view hierarchy is currently animating away, |
| // meaning we need to wait a bit on completely destroying it. This is the |
| // view that is animating. |
| View mAnimatingAway; |
| |
| // Non-null if the fragment's view hierarchy is currently animating away with an |
| // animator instead of an animation. |
| Animator mAnimator; |
| |
| // If mAnimatingAway != null, this is the state we should move to once the |
| // animation is done. |
| int mStateAfterAnimating; |
| |
| // If app has requested a specific animation, this is the one to use. |
| int mNextAnim; |
| |
| // If app has requested a specific transition, this is the one to use. |
| int mNextTransition; |
| |
| // If app has requested a specific transition style, this is the one to use. |
| int mNextTransitionStyle; |
| |
| Object mEnterTransition = null; |
| Object mReturnTransition = USE_DEFAULT_TRANSITION; |
| Object mExitTransition = null; |
| Object mReenterTransition = USE_DEFAULT_TRANSITION; |
| Object mSharedElementEnterTransition = null; |
| Object mSharedElementReturnTransition = USE_DEFAULT_TRANSITION; |
| Boolean mAllowReturnTransitionOverlap; |
| Boolean mAllowEnterTransitionOverlap; |
| |
| SharedElementCallback mEnterTransitionCallback = null; |
| SharedElementCallback mExitTransitionCallback = null; |
| |
| // True when postponeEnterTransition has been called and startPostponeEnterTransition |
| // hasn't been called yet. |
| boolean mEnterTransitionPostponed; |
| |
| // Listener to wait for startPostponeEnterTransition. After being called, it will |
| // be set to null |
| OnStartEnterTransitionListener mStartEnterTransitionListener; |
| |
| // True if the View was hidden, but the transition is handling the hide |
| boolean mIsHideReplaced; |
| } |
| } |