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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.app;
import android.animation.Animator;
import android.content.ComponentCallbacks2;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AndroidRuntimeException;
import android.util.ArrayMap;
import android.util.AttributeSet;
import android.util.DebugUtils;
import android.util.Log;
import android.util.SparseArray;
import android.util.SuperNotCalledException;
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.widget.AdapterView;
import java.io.FileDescriptor;
import java.io.PrintWriter;
final class FragmentState implements Parcelable {
final String mClassName;
final int mIndex;
final boolean mFromLayout;
final int mFragmentId;
final int mContainerId;
final String mTag;
final boolean mRetainInstance;
final boolean mDetached;
final Bundle mArguments;
Bundle mSavedFragmentState;
Fragment mInstance;
public FragmentState(Fragment frag) {
mClassName = frag.getClass().getName();
mIndex = frag.mIndex;
mFromLayout = frag.mFromLayout;
mFragmentId = frag.mFragmentId;
mContainerId = frag.mContainerId;
mTag = frag.mTag;
mRetainInstance = frag.mRetainInstance;
mDetached = frag.mDetached;
mArguments = frag.mArguments;
}
public FragmentState(Parcel in) {
mClassName = in.readString();
mIndex = in.readInt();
mFromLayout = in.readInt() != 0;
mFragmentId = in.readInt();
mContainerId = in.readInt();
mTag = in.readString();
mRetainInstance = in.readInt() != 0;
mDetached = in.readInt() != 0;
mArguments = in.readBundle();
mSavedFragmentState = in.readBundle();
}
public Fragment instantiate(Activity activity, Fragment parent) {
if (mInstance != null) {
return mInstance;
}
if (mArguments != null) {
mArguments.setClassLoader(activity.getClassLoader());
}
mInstance = Fragment.instantiate(activity, mClassName, mArguments);
if (mSavedFragmentState != null) {
mSavedFragmentState.setClassLoader(activity.getClassLoader());
mInstance.mSavedFragmentState = mSavedFragmentState;
}
mInstance.setIndex(mIndex, parent);
mInstance.mFromLayout = mFromLayout;
mInstance.mRestored = true;
mInstance.mFragmentId = mFragmentId;
mInstance.mContainerId = mContainerId;
mInstance.mTag = mTag;
mInstance.mRetainInstance = mRetainInstance;
mInstance.mDetached = mDetached;
mInstance.mFragmentManager = activity.mFragments;
if (FragmentManagerImpl.DEBUG) Log.v(FragmentManagerImpl.TAG,
"Instantiated fragment " + mInstance);
return mInstance;
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(mClassName);
dest.writeInt(mIndex);
dest.writeInt(mFromLayout ? 1 : 0);
dest.writeInt(mFragmentId);
dest.writeInt(mContainerId);
dest.writeString(mTag);
dest.writeInt(mRetainInstance ? 1 : 0);
dest.writeInt(mDetached ? 1 : 0);
dest.writeBundle(mArguments);
dest.writeBundle(mSavedFragmentState);
}
public static final Parcelable.Creator CREATOR
= new Parcelable.Creator() {
public FragmentState createFromParcel(Parcel in) {
return new FragmentState(in);
}
public FragmentState[] newArray(int size) {
return new FragmentState[size];
}
};
}
/**
* A Fragment is a piece of an application's user interface or behavior
* that can be placed in an {@link Activity}. Interaction with fragments
* is done through {@link FragmentManager}, which can be obtained via
* {@link Activity#getFragmentManager() Activity.getFragmentManager()} and
* {@link Fragment#getFragmentManager() Fragment.getFragmentManager()}.
*
* The Fragment class can be used many ways to achieve a wide variety of
* results. In its core, it represents a particular operation or interface
* that is running within a larger {@link Activity}. A Fragment is closely
* tied to the Activity it is in, and can not be used apart from one. Though
* Fragment defines its own lifecycle, that lifecycle is dependent on its
* activity: if the activity is stopped, no fragments inside of it can be
* started; when the activity is destroyed, all fragments will be destroyed.
*
*
All subclasses of Fragment must include a public empty constructor.
* The framework will often re-instantiate a fragment class when needed,
* in particular during state restore, and needs to be able to find this
* constructor to instantiate it. If the empty constructor is not available,
* a runtime exception will occur in some cases during state restore.
*
*
Topics covered here:
*
* - Older Platforms
*
- Lifecycle
*
- Layout
*
- Back Stack
*
*
*
* Developer Guides
* For more information about using fragments, read the
* Fragments developer guide.
*
*
*
* Older Platforms
*
* While the Fragment API was introduced in
* {@link android.os.Build.VERSION_CODES#HONEYCOMB}, a version of the API
* at is also available for use on older platforms through
* {@link android.support.v4.app.FragmentActivity}. See the blog post
*
* Fragments For All for more details.
*
*
* Lifecycle
*
* Though a Fragment's lifecycle is tied to its owning activity, it has
* its own wrinkle on the standard activity lifecycle. It includes basic
* activity lifecycle methods such as {@link #onResume}, but also important
* are methods related to interactions with the activity and UI generation.
*
*
The core series of lifecycle methods that are called to bring a fragment
* up to resumed state (interacting with the user) are:
*
*
* - {@link #onAttach} called once the fragment is associated with its activity.
*
- {@link #onCreate} called to do initial creation of the fragment.
*
- {@link #onCreateView} creates and returns the view hierarchy associated
* with the fragment.
*
- {@link #onActivityCreated} tells the fragment that its activity has
* completed its own {@link Activity#onCreate Activity.onCreate()}.
*
- {@link #onViewStateRestored} tells the fragment that all of the saved
* state of its view hierarchy has been restored.
*
- {@link #onStart} makes the fragment visible to the user (based on its
* containing activity being started).
*
- {@link #onResume} makes the fragment interacting with the user (based on its
* containing activity being resumed).
*
*
* As a fragment is no longer being used, it goes through a reverse
* series of callbacks:
*
*
* - {@link #onPause} fragment is no longer interacting with the user either
* because its activity is being paused or a fragment operation is modifying it
* in the activity.
*
- {@link #onStop} fragment is no longer visible to the user either
* because its activity is being stopped or a fragment operation is modifying it
* in the activity.
*
- {@link #onDestroyView} allows the fragment to clean up resources
* associated with its View.
*
- {@link #onDestroy} called to do final cleanup of the fragment's state.
*
- {@link #onDetach} called immediately prior to the fragment no longer
* being associated with its activity.
*
*
*
* Layout
*
* Fragments can be used as part of your application's layout, allowing
* you to better modularize your code and more easily adjust your user
* interface to the screen it is running on. As an example, we can look
* at a simple program consisting of a list of items, and display of the
* details of each item.
*
* An activity's layout XML can include <fragment> tags
* to embed fragment instances inside of the layout. For example, here is
* a simple layout that embeds one fragment:
*
* {@sample development/samples/ApiDemos/res/layout/fragment_layout.xml layout}
*
* The layout is installed in the activity in the normal way:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentLayout.java
* main}
*
* The titles fragment, showing a list of titles, is fairly simple, relying
* on {@link ListFragment} for most of its work. Note the implementation of
* clicking an item: depending on the current activity's layout, it can either
* create and display a new fragment to show the details in-place (more about
* this later), or start a new activity to show the details.
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentLayout.java
* titles}
*
* The details fragment showing the contents of a selected item just
* displays a string of text based on an index of a string array built in to
* the app:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentLayout.java
* details}
*
* In this case when the user clicks on a title, there is no details
* container in the current activity, so the titles fragment's click code will
* launch a new activity to display the details fragment:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentLayout.java
* details_activity}
*
* However the screen may be large enough to show both the list of titles
* and details about the currently selected title. To use such a layout on
* a landscape screen, this alternative layout can be placed under layout-land:
*
* {@sample development/samples/ApiDemos/res/layout-land/fragment_layout.xml layout}
*
* Note how the prior code will adjust to this alternative UI flow: the titles
* fragment will now embed the details fragment inside of this activity, and the
* details activity will finish itself if it is running in a configuration
* where the details can be shown in-place.
*
*
When a configuration change causes the activity hosting these fragments
* to restart, its new instance may use a different layout that doesn't
* include the same fragments as the previous layout. In this case all of
* the previous fragments will still be instantiated and running in the new
* instance. However, any that are no longer associated with a <fragment>
* tag in the view hierarchy will not have their content view created
* and will return false from {@link #isInLayout}. (The code here also shows
* how you can determine if a fragment placed in a container is no longer
* running in a layout with that container and avoid creating its view hierarchy
* in that case.)
*
*
The attributes of the <fragment> tag are used to control the
* LayoutParams provided when attaching the fragment's view to the parent
* container. They can also be parsed by the fragment in {@link #onInflate}
* as parameters.
*
*
The fragment being instantiated must have some kind of unique identifier
* so that it can be re-associated with a previous instance if the parent
* activity needs to be destroyed and recreated. This can be provided these
* ways:
*
*
* - If nothing is explicitly supplied, the view ID of the container will
* be used.
*
android:tag can be used in <fragment> to provide
* a specific tag name for the fragment.
* android:id can be used in <fragment> to provide
* a specific identifier for the fragment.
*
*
*
* Back Stack
*
* The transaction in which fragments are modified can be placed on an
* internal back-stack of the owning activity. When the user presses back
* in the activity, any transactions on the back stack are popped off before
* the activity itself is finished.
*
*
For example, consider this simple fragment that is instantiated with
* an integer argument and displays that in a TextView in its UI:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentStack.java
* fragment}
*
* A function that creates a new instance of the fragment, replacing
* whatever current fragment instance is being shown and pushing that change
* on to the back stack could be written as:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentStack.java
* add_stack}
*
*
After each call to this function, a new entry is on the stack, and
* pressing back will pop it to return the user to whatever previous state
* the activity UI was in.
*/
public class Fragment implements ComponentCallbacks2, OnCreateContextMenuListener {
private static final ArrayMap> sClassMap =
new ArrayMap>();
static final int INVALID_STATE = -1; // Invalid state used as a null value.
static final int INITIALIZING = 0; // Not yet created.
static final int CREATED = 1; // Created.
static final int ACTIVITY_CREATED = 2; // The activity has finished its creation.
static final int STOPPED = 3; // Fully created, not started.
static final int STARTED = 4; // Created and started, not resumed.
static final int RESUMED = 5; // Created started and resumed.
int mState = INITIALIZING;
// 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
// animation that is running.
Animator mAnimatingAway;
// If mAnimatingAway != null, this is the state we should move to once the
// animation is done.
int mStateAfterAnimating;
// When instantiated from saved state, this is the saved state.
Bundle mSavedFragmentState;
SparseArray mSavedViewState;
// Index into active fragment array.
int mIndex = -1;
// Internal unique name for this fragment;
String mWho;
// Construction arguments;
Bundle mArguments;
// Target fragment.
Fragment mTarget;
// For use when retaining a fragment: this is the index of the last mTarget.
int mTargetIndex = -1;
// 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;
// True if the fragment is in the resumed state.
boolean mResumed;
// 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;
// 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;
// Activity this fragment is attached to.
Activity mActivity;
// 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 detached.
boolean mDetached;
// If set this fragment would like its instance retained across
// configuration changes.
boolean mRetainInstance;
// If set this fragment is being retained across the current config change.
boolean mRetaining;
// 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;
// If app has requested a specific animation, this is the one to use.
int mNextAnim;
// The parent container of the fragment after dynamically added to UI.
ViewGroup mContainer;
// The View generated for this fragment.
View mView;
// 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;
LoaderManagerImpl mLoaderManager;
boolean mLoadersStarted;
boolean mCheckedForLoaderManager;
/**
* State information that has been retrieved from a fragment instance
* through {@link FragmentManager#saveFragmentInstanceState(Fragment)
* FragmentManager.saveFragmentInstanceState}.
*/
public static class SavedState implements Parcelable {
final Bundle mState;
SavedState(Bundle state) {
mState = state;
}
SavedState(Parcel in, ClassLoader loader) {
mState = in.readBundle();
if (loader != null && mState != null) {
mState.setClassLoader(loader);
}
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeBundle(mState);
}
public static final Parcelable.ClassLoaderCreator CREATOR
= new Parcelable.ClassLoaderCreator() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in, null);
}
public SavedState createFromParcel(Parcel in, ClassLoader loader) {
return new SavedState(in, loader);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
/**
* Thrown by {@link Fragment#instantiate(Context, String, Bundle)} when
* there is an instantiation failure.
*/
static public class InstantiationException extends AndroidRuntimeException {
public InstantiationException(String msg, Exception cause) {
super(msg, cause);
}
}
/**
* Default constructor. Every 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}.
*
* Applications should generally not implement a constructor. The
* first place application code an run where the fragment is ready to
* be used is in {@link #onAttach(Activity)}, the point where the fragment
* is actually associated with its activity. Some applications may also
* want to implement {@link #onInflate} to retrieve attributes from a
* layout resource, though should take care here because this happens for
* the fragment is attached to its activity.
*/
public Fragment() {
}
/**
* Like {@link #instantiate(Context, String, Bundle)} but with a null
* argument Bundle.
*/
public static Fragment instantiate(Context context, 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.
*
* @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.
*/
public static Fragment instantiate(Context context, String fname, Bundle args) {
try {
Class clazz = sClassMap.get(fname);
if (clazz == null) {
// Class not found in the cache, see if it's real, and try to add it
clazz = context.getClassLoader().loadClass(fname);
if (!Fragment.class.isAssignableFrom(clazz)) {
throw new InstantiationException("Trying to instantiate a class " + fname
+ " that is not a Fragment", new ClassCastException());
}
sClassMap.put(fname, clazz);
}
Fragment f = (Fragment)clazz.newInstance();
if (args != null) {
args.setClassLoader(f.getClass().getClassLoader());
f.mArguments = args;
}
return f;
} catch (ClassNotFoundException 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 (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);
}
}
final void restoreViewState(Bundle savedInstanceState) {
if (mSavedViewState != null) {
mView.restoreHierarchyState(mSavedViewState);
mSavedViewState = null;
}
mCalled = false;
onViewStateRestored(savedInstanceState);
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onViewStateRestored()");
}
}
final void setIndex(int index, Fragment parent) {
mIndex = index;
if (parent != null) {
mWho = parent.mWho + ":" + mIndex;
} else {
mWho = "android:fragment:" + mIndex;
}
}
final boolean isInBackStack() {
return mBackStackNesting > 0;
}
/**
* Subclasses can not override equals().
*/
@Override final public boolean equals(Object o) {
return super.equals(o);
}
/**
* Subclasses can not override hashCode().
*/
@Override final public int hashCode() {
return super.hashCode();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(128);
DebugUtils.buildShortClassTag(this, sb);
if (mIndex >= 0) {
sb.append(" #");
sb.append(mIndex);
}
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.
*/
final public String getTag() {
return mTag;
}
/**
* Supply the construction arguments for this fragment. This can only
* be called before the fragment has been attached to its activity; that
* is, you should call it immediately after constructing the fragment. The
* arguments supplied here will be retained across fragment destroy and
* creation.
*/
public void setArguments(Bundle args) {
if (mIndex >= 0) {
throw new IllegalStateException("Fragment already active");
}
mArguments = args;
}
/**
* Return the arguments supplied when the fragment was instantiated,
* if any.
*/
final public Bundle getArguments() {
return mArguments;
}
/**
* 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(SavedState state) {
if (mIndex >= 0) {
throw new IllegalStateException("Fragment already active");
}
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)}.
*/
public void setTargetFragment(Fragment fragment, int requestCode) {
mTarget = fragment;
mTargetRequestCode = requestCode;
}
/**
* Return the target fragment set by {@link #setTargetFragment}.
*/
final public Fragment getTargetFragment() {
return mTarget;
}
/**
* Return the target request code set by {@link #setTargetFragment}.
*/
final public int getTargetRequestCode() {
return mTargetRequestCode;
}
/**
* Return the Activity this fragment is currently associated with.
*/
final public Activity getActivity() {
return mActivity;
}
/**
* Return getActivity().getResources().
*/
final public Resources getResources() {
if (mActivity == null) {
throw new IllegalStateException("Fragment " + this + " not attached to Activity");
}
return mActivity.getResources();
}
/**
* Return a localized, styled CharSequence from the application's package's
* default string table.
*
* @param resId Resource id for the CharSequence text
*/
public final CharSequence getText(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
*/
public final String getString(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.
*/
public final String getString(int resId, 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.
*
*
If this Fragment is a child of another Fragment, the FragmentManager
* returned here will be the parent's {@link #getChildFragmentManager()}.
*/
final public FragmentManager getFragmentManager() {
return mFragmentManager;
}
/**
* Return a private FragmentManager for placing and managing Fragments
* inside of this Fragment.
*/
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;
}
/**
* Returns the parent Fragment containing this Fragment. If this Fragment
* is attached directly to an Activity, returns null.
*/
final public Fragment getParentFragment() {
return mParentFragment;
}
/**
* Return true if the fragment is currently added to its activity.
*/
final public boolean isAdded() {
return mActivity != 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 not 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, except
* 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 mResumed;
}
/**
* 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;
}
/**
* 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 if it is not
* visible.
*/
public void onHiddenChanged(boolean hidden) {
}
/**
* Control whether a fragment instance is retained across Activity
* re-creation (such as from a configuration change). This can only
* be used with fragments not in the back stack. If set, the fragment
* lifecycle will be slightly different when an activity is recreated:
*
* - {@link #onDestroy()} will not be called (but {@link #onDetach()} still
* will be, because the fragment is being detached from its current activity).
*
- {@link #onCreate(Bundle)} will not be called since the fragment
* is not being re-created.
*
- {@link #onAttach(Activity)} and {@link #onActivityCreated(Bundle)} will
* still be called.
*
*/
public void setRetainInstance(boolean retain) {
if (retain && mParentFragment != null) {
throw new IllegalStateException(
"Can't retain fragements that are nested in other fragments");
}
mRetainInstance = retain;
}
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()) {
mFragmentManager.invalidateOptionsMenu();
}
}
}
/**
* 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()) {
mFragmentManager.invalidateOptionsMenu();
}
}
}
/**
* 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.
*
* 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.
*
* @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.performPendingDeferredStart(this);
}
mUserVisibleHint = isVisibleToUser;
mDeferStart = !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, creating it if needed.
*/
public LoaderManager getLoaderManager() {
if (mLoaderManager != null) {
return mLoaderManager;
}
if (mActivity == null) {
throw new IllegalStateException("Fragment " + this + " not attached to Activity");
}
mCheckedForLoaderManager = true;
mLoaderManager = mActivity.getLoaderManager(mWho, mLoadersStarted, true);
return mLoaderManager;
}
/**
* Call {@link Activity#startActivity(Intent)} from the fragment's
* containing Activity.
*
* @param intent The intent to start.
*/
public void startActivity(Intent intent) {
startActivity(intent, null);
}
/**
* Call {@link Activity#startActivity(Intent, Bundle)} from the fragment's
* containing Activity.
*
* @param intent The intent to start.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)
* Context.startActivity(Intent, Bundle)} for more details.
*/
public void startActivity(Intent intent, Bundle options) {
if (mActivity == null) {
throw new IllegalStateException("Fragment " + this + " not attached to Activity");
}
if (options != null) {
mActivity.startActivityFromFragment(this, intent, -1, options);
} else {
// Note we want to go through this call for compatibility with
// applications that may have overridden the method.
mActivity.startActivityFromFragment(this, intent, -1);
}
}
/**
* Call {@link Activity#startActivityForResult(Intent, int)} from the fragment's
* containing Activity.
*/
public void startActivityForResult(Intent intent, int requestCode) {
startActivityForResult(intent, requestCode, null);
}
/**
* Call {@link Activity#startActivityForResult(Intent, int, Bundle)} from the fragment's
* containing Activity.
*/
public void startActivityForResult(Intent intent, int requestCode, Bundle options) {
if (mActivity == null) {
throw new IllegalStateException("Fragment " + this + " not attached to Activity");
}
if (options != null) {
mActivity.startActivityFromFragment(this, intent, requestCode, options);
} else {
// Note we want to go through this call for compatibility with
// applications that may have overridden the method.
mActivity.startActivityFromFragment(this, intent, requestCode, 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, Intent data) {
}
/**
* @hide Hack so that DialogFragment can make its Dialog before creating
* its views, and the view construction can use the dialog's context for
* inflation. Maybe this should become a public API. Note sure.
*/
public LayoutInflater getLayoutInflater(Bundle savedInstanceState) {
return mActivity.getLayoutInflater();
}
/**
* @deprecated Use {@link #onInflate(Activity, AttributeSet, Bundle)} instead.
*/
@Deprecated
public void onInflate(AttributeSet attrs, Bundle savedInstanceState) {
mCalled = true;
}
/**
* 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
* tag in a layout file. Note this is before the fragment's
* {@link #onAttach(Activity)} has been called; all you should do here is
* parse the attributes and save them away.
*
* 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.
*
* Here is a typical implementation of a fragment that can take parameters
* both through attributes supplied here as well from {@link #getArguments()}:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentArguments.java
* fragment}
*
* Note that parsing the XML attributes uses a "styleable" resource. The
* declaration for the styleable used here is:
*
* {@sample development/samples/ApiDemos/res/values/attrs.xml fragment_arguments}
*
* The fragment can then be declared within its activity's content layout
* through a tag like this:
*
* {@sample development/samples/ApiDemos/res/layout/fragment_arguments.xml from_attributes}
*
* 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:
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentArguments.java
* create}
*
* @param activity 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.
*/
public void onInflate(Activity activity, AttributeSet attrs, Bundle savedInstanceState) {
onInflate(attrs, savedInstanceState);
mCalled = true;
}
/**
* Called when a fragment is first attached to its activity.
* {@link #onCreate(Bundle)} will be called after this.
*/
public void onAttach(Activity activity) {
mCalled = true;
}
/**
* Called when a fragment loads an animation.
*/
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)}.
*
* 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)}.
*
* @param savedInstanceState If the fragment is being re-created from
* a previous saved state, this is the state.
*/
public void onCreate(Bundle savedInstanceState) {
mCalled = true;
}
/**
* Called to have the fragment instantiate its user interface view.
* This is optional, and non-graphical fragments can return null (which
* is the default implementation). This will be called between
* {@link #onCreate(Bundle)} and {@link #onActivityCreated(Bundle)}.
*
*
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.
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
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(View view, 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.
*/
public View getView() {
return mView;
}
/**
* 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.
*/
public void onActivityCreated(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.
*/
public void onViewStateRestored(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.
*/
public void onStart() {
mCalled = true;
if (!mLoadersStarted) {
mLoadersStarted = true;
if (!mCheckedForLoaderManager) {
mCheckedForLoaderManager = true;
mLoaderManager = mActivity.getLoaderManager(mWho, mLoadersStarted, false);
}
if (mLoaderManager != null) {
mLoaderManager.doStart();
}
}
}
/**
* 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.
*/
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)}.
*
*
This corresponds to {@link Activity#onSaveInstanceState(Bundle)
* Activity.onSaveInstanceState(Bundle)} and most of the discussion there
* applies here as well. Note however: this method may be called
* at any time before {@link #onDestroy()}. 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(Bundle outState) {
}
public void onConfigurationChanged(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.
*/
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.
*/
public void onStop() {
mCalled = true;
}
public void onLowMemory() {
mCalled = true;
}
public void onTrimMemory(int level) {
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
* regardless 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.
*/
public void onDestroyView() {
mCalled = true;
}
/**
* Called when the fragment is no longer in use. This is called
* after {@link #onStop()} and before {@link #onDetach()}.
*/
public void onDestroy() {
mCalled = true;
//Log.v("foo", "onDestroy: mCheckedForLoaderManager=" + mCheckedForLoaderManager
// + " mLoaderManager=" + mLoaderManager);
if (!mCheckedForLoaderManager) {
mCheckedForLoaderManager = true;
mLoaderManager = mActivity.getLoaderManager(mWho, mLoadersStarted, false);
}
if (mLoaderManager != null) {
mLoaderManager.doDestroy();
}
}
/**
* 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() {
mIndex = -1;
mWho = null;
mAdded = false;
mRemoving = false;
mResumed = false;
mFromLayout = false;
mInLayout = false;
mRestored = false;
mBackStackNesting = 0;
mFragmentManager = null;
mActivity = null;
mFragmentId = 0;
mContainerId = 0;
mTag = null;
mHidden = false;
mDetached = false;
mRetaining = false;
mLoaderManager = null;
mLoadersStarted = false;
mCheckedForLoaderManager = false;
}
/**
* Called when the fragment is no longer attached to its activity. This
* is called after {@link #onDestroy()}.
*/
public void onDetach() {
mCalled = true;
}
/**
* Initialize the contents of the Activity's standard options menu. You
* should place your menu items in to menu. 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(Menu menu, MenuInflater inflater) {
}
/**
* Prepare the Screen'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(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.
*
*
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(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(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})).
*
* Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an
* item has been selected.
*
* 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.
*
* It is not safe to hold onto the context menu after this method returns.
* {@inheritDoc}
*/
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
getActivity().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(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(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.
*
* Use {@link MenuItem#getMenuInfo()} to get extra information set by the
* View that added this menu item.
*
* 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(MenuItem item) {
return false;
}
/**
* 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(String prefix, FileDescriptor fd, PrintWriter writer, 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(" mIndex="); writer.print(mIndex);
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(" mResumed="); writer.print(mResumed);
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(" mRetaining="); writer.print(mRetaining);
writer.print(" mUserVisibleHint="); writer.println(mUserVisibleHint);
if (mFragmentManager != null) {
writer.print(prefix); writer.print("mFragmentManager=");
writer.println(mFragmentManager);
}
if (mActivity != null) {
writer.print(prefix); writer.print("mActivity=");
writer.println(mActivity);
}
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);
}
if (mTarget != null) {
writer.print(prefix); writer.print("mTarget="); writer.print(mTarget);
writer.print(" mTargetRequestCode=");
writer.println(mTargetRequestCode);
}
if (mNextAnim != 0) {
writer.print(prefix); writer.print("mNextAnim="); writer.println(mNextAnim);
}
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 (mAnimatingAway != null) {
writer.print(prefix); writer.print("mAnimatingAway="); writer.println(mAnimatingAway);
writer.print(prefix); writer.print("mStateAfterAnimating=");
writer.println(mStateAfterAnimating);
}
if (mLoaderManager != null) {
writer.print(prefix); writer.println("Loader Manager:");
mLoaderManager.dump(prefix + " ", fd, writer, args);
}
if (mChildFragmentManager != null) {
writer.print(prefix); writer.println("Child " + mChildFragmentManager + ":");
mChildFragmentManager.dump(prefix + " ", fd, writer, args);
}
}
Fragment findFragmentByWho(String who) {
if (who.equals(mWho)) {
return this;
}
if (mChildFragmentManager != null) {
return mChildFragmentManager.findFragmentByWho(who);
}
return null;
}
void instantiateChildFragmentManager() {
mChildFragmentManager = new FragmentManagerImpl();
mChildFragmentManager.attachActivity(mActivity, new FragmentContainer() {
@Override
public View findViewById(int id) {
if (mView == null) {
throw new IllegalStateException("Fragment does not have a view");
}
return mView.findViewById(id);
}
}, this);
}
void performCreate(Bundle savedInstanceState) {
if (mChildFragmentManager != null) {
mChildFragmentManager.noteStateNotSaved();
}
mCalled = false;
onCreate(savedInstanceState);
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onCreate()");
}
if (savedInstanceState != null) {
Parcelable p = savedInstanceState.getParcelable(Activity.FRAGMENTS_TAG);
if (p != null) {
if (mChildFragmentManager == null) {
instantiateChildFragmentManager();
}
mChildFragmentManager.restoreAllState(p, null);
mChildFragmentManager.dispatchCreate();
}
}
}
View performCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (mChildFragmentManager != null) {
mChildFragmentManager.noteStateNotSaved();
}
return onCreateView(inflater, container, savedInstanceState);
}
void performActivityCreated(Bundle savedInstanceState) {
if (mChildFragmentManager != null) {
mChildFragmentManager.noteStateNotSaved();
}
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();
}
mCalled = false;
onStart();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onStart()");
}
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchStart();
}
if (mLoaderManager != null) {
mLoaderManager.doReportStart();
}
}
void performResume() {
if (mChildFragmentManager != null) {
mChildFragmentManager.noteStateNotSaved();
mChildFragmentManager.execPendingActions();
}
mCalled = false;
onResume();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onResume()");
}
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchResume();
mChildFragmentManager.execPendingActions();
}
}
void performConfigurationChanged(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(Menu menu, 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(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(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(MenuItem item) {
if (!mHidden) {
if (onContextItemSelected(item)) {
return true;
}
if (mChildFragmentManager != null) {
if (mChildFragmentManager.dispatchContextItemSelected(item)) {
return true;
}
}
}
return false;
}
void performOptionsMenuClosed(Menu menu) {
if (!mHidden) {
if (mHasMenu && mMenuVisible) {
onOptionsMenuClosed(menu);
}
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchOptionsMenuClosed(menu);
}
}
}
void performSaveInstanceState(Bundle outState) {
onSaveInstanceState(outState);
if (mChildFragmentManager != null) {
Parcelable p = mChildFragmentManager.saveAllState();
if (p != null) {
outState.putParcelable(Activity.FRAGMENTS_TAG, p);
}
}
}
void performPause() {
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchPause();
}
mCalled = false;
onPause();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onPause()");
}
}
void performStop() {
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchStop();
}
mCalled = false;
onStop();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onStop()");
}
if (mLoadersStarted) {
mLoadersStarted = false;
if (!mCheckedForLoaderManager) {
mCheckedForLoaderManager = true;
mLoaderManager = mActivity.getLoaderManager(mWho, mLoadersStarted, false);
}
if (mLoaderManager != null) {
if (mActivity == null || !mActivity.mChangingConfigurations) {
mLoaderManager.doStop();
} else {
mLoaderManager.doRetain();
}
}
}
}
void performDestroyView() {
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchDestroyView();
}
mCalled = false;
onDestroyView();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onDestroyView()");
}
if (mLoaderManager != null) {
mLoaderManager.doReportNextStart();
}
}
void performDestroy() {
if (mChildFragmentManager != null) {
mChildFragmentManager.dispatchDestroy();
}
mCalled = false;
onDestroy();
if (!mCalled) {
throw new SuperNotCalledException("Fragment " + this
+ " did not call through to super.onDestroy()");
}
}
}