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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* 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.animation.AnimatorInflater;
import android.animation.AnimatorListenerAdapter;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.os.Debug;
import android.os.Handler;
import android.os.Looper;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.DebugUtils;
import android.util.Log;
import android.util.LogWriter;
import android.util.SparseArray;
import android.util.SuperNotCalledException;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import com.android.internal.util.FastPrintWriter;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
/**
* Interface for interacting with {@link Fragment} objects inside of an
* {@link Activity}
*
*
* Developer Guides
* For more information about using fragments, read the
* Fragments developer guide.
*
*
* While the FragmentManager 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.
*/
public abstract class FragmentManager {
/**
* Representation of an entry on the fragment back stack, as created
* with {@link FragmentTransaction#addToBackStack(String)
* FragmentTransaction.addToBackStack()}. Entries can later be
* retrieved with {@link FragmentManager#getBackStackEntryAt(int)
* FragmentManager.getBackStackEntry()}.
*
* Note that you should never hold on to a BackStackEntry object;
* the identifier as returned by {@link #getId} is the only thing that
* will be persisted across activity instances.
*/
public interface BackStackEntry {
/**
* Return the unique identifier for the entry. This is the only
* representation of the entry that will persist across activity
* instances.
*/
public int getId();
/**
* Get the name that was supplied to
* {@link FragmentTransaction#addToBackStack(String)
* FragmentTransaction.addToBackStack(String)} when creating this entry.
*/
public String getName();
/**
* Return the full bread crumb title resource identifier for the entry,
* or 0 if it does not have one.
*/
public int getBreadCrumbTitleRes();
/**
* Return the short bread crumb title resource identifier for the entry,
* or 0 if it does not have one.
*/
public int getBreadCrumbShortTitleRes();
/**
* Return the full bread crumb title for the entry, or null if it
* does not have one.
*/
public CharSequence getBreadCrumbTitle();
/**
* Return the short bread crumb title for the entry, or null if it
* does not have one.
*/
public CharSequence getBreadCrumbShortTitle();
}
/**
* Interface to watch for changes to the back stack.
*/
public interface OnBackStackChangedListener {
/**
* Called whenever the contents of the back stack change.
*/
public void onBackStackChanged();
}
/**
* Start a series of edit operations on the Fragments associated with
* this FragmentManager.
*
*
Note: A fragment transaction can only be created/committed prior
* to an activity saving its state. If you try to commit a transaction
* after {@link Activity#onSaveInstanceState Activity.onSaveInstanceState()}
* (and prior to a following {@link Activity#onStart Activity.onStart}
* or {@link Activity#onResume Activity.onResume()}, you will get an error.
* This is because the framework takes care of saving your current fragments
* in the state, and if changes are made after the state is saved then they
* will be lost.
*/
public abstract FragmentTransaction beginTransaction();
/** @hide -- remove once prebuilts are in. */
@Deprecated
public FragmentTransaction openTransaction() {
return beginTransaction();
}
/**
* After a {@link FragmentTransaction} is committed with
* {@link FragmentTransaction#commit FragmentTransaction.commit()}, it
* is scheduled to be executed asynchronously on the process's main thread.
* If you want to immediately executing any such pending operations, you
* can call this function (only from the main thread) to do so. Note that
* all callbacks and other related behavior will be done from within this
* call, so be careful about where this is called from.
*
* @return Returns true if there were any pending transactions to be
* executed.
*/
public abstract boolean executePendingTransactions();
/**
* Finds a fragment that was identified by the given id either when inflated
* from XML or as the container ID when added in a transaction. This first
* searches through fragments that are currently added to the manager's
* activity; if no such fragment is found, then all fragments currently
* on the back stack associated with this ID are searched.
* @return The fragment if found or null otherwise.
*/
public abstract Fragment findFragmentById(int id);
/**
* Finds a fragment that was identified by the given tag either when inflated
* from XML or as supplied when added in a transaction. This first
* searches through fragments that are currently added to the manager's
* activity; if no such fragment is found, then all fragments currently
* on the back stack are searched.
* @return The fragment if found or null otherwise.
*/
public abstract Fragment findFragmentByTag(String tag);
/**
* Flag for {@link #popBackStack(String, int)}
* and {@link #popBackStack(int, int)}: If set, and the name or ID of
* a back stack entry has been supplied, then all matching entries will
* be consumed until one that doesn't match is found or the bottom of
* the stack is reached. Otherwise, all entries up to but not including that entry
* will be removed.
*/
public static final int POP_BACK_STACK_INCLUSIVE = 1<<0;
/**
* Pop the top state off the back stack. This function is asynchronous -- it
* enqueues the request to pop, but the action will not be performed until the
* application returns to its event loop.
*/
public abstract void popBackStack();
/**
* Like {@link #popBackStack()}, but performs the operation immediately
* inside of the call. This is like calling {@link #executePendingTransactions()}
* afterwards.
* @return Returns true if there was something popped, else false.
*/
public abstract boolean popBackStackImmediate();
/**
* Pop the last fragment transition from the manager's fragment
* back stack. If there is nothing to pop, false is returned.
* This function is asynchronous -- it enqueues the
* request to pop, but the action will not be performed until the application
* returns to its event loop.
*
* @param name If non-null, this is the name of a previous back state
* to look for; if found, all states up to that state will be popped. The
* {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether
* the named state itself is popped. If null, only the top state is popped.
* @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}.
*/
public abstract void popBackStack(String name, int flags);
/**
* Like {@link #popBackStack(String, int)}, but performs the operation immediately
* inside of the call. This is like calling {@link #executePendingTransactions()}
* afterwards.
* @return Returns true if there was something popped, else false.
*/
public abstract boolean popBackStackImmediate(String name, int flags);
/**
* Pop all back stack states up to the one with the given identifier.
* This function is asynchronous -- it enqueues the
* request to pop, but the action will not be performed until the application
* returns to its event loop.
*
* @param id Identifier of the stated to be popped. If no identifier exists,
* false is returned.
* The identifier is the number returned by
* {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The
* {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether
* the named state itself is popped.
* @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}.
*/
public abstract void popBackStack(int id, int flags);
/**
* Like {@link #popBackStack(int, int)}, but performs the operation immediately
* inside of the call. This is like calling {@link #executePendingTransactions()}
* afterwards.
* @return Returns true if there was something popped, else false.
*/
public abstract boolean popBackStackImmediate(int id, int flags);
/**
* Return the number of entries currently in the back stack.
*/
public abstract int getBackStackEntryCount();
/**
* Return the BackStackEntry at index index in the back stack;
* entries start index 0 being the bottom of the stack.
*/
public abstract BackStackEntry getBackStackEntryAt(int index);
/**
* Add a new listener for changes to the fragment back stack.
*/
public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener);
/**
* Remove a listener that was previously added with
* {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}.
*/
public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener);
/**
* Put a reference to a fragment in a Bundle. This Bundle can be
* persisted as saved state, and when later restoring
* {@link #getFragment(Bundle, String)} will return the current
* instance of the same fragment.
*
* @param bundle The bundle in which to put the fragment reference.
* @param key The name of the entry in the bundle.
* @param fragment The Fragment whose reference is to be stored.
*/
public abstract void putFragment(Bundle bundle, String key, Fragment fragment);
/**
* Retrieve the current Fragment instance for a reference previously
* placed with {@link #putFragment(Bundle, String, Fragment)}.
*
* @param bundle The bundle from which to retrieve the fragment reference.
* @param key The name of the entry in the bundle.
* @return Returns the current Fragment instance that is associated with
* the given reference.
*/
public abstract Fragment getFragment(Bundle bundle, String key);
/**
* Save the current instance state of the given Fragment. This can be
* used later when creating a new instance of the Fragment and adding
* it to the fragment manager, to have it create itself to match the
* current state returned here. Note that there are limits on how
* this can be used:
*
*
* - The Fragment must currently be attached to the FragmentManager.
*
- A new Fragment created using this saved state must be the same class
* type as the Fragment it was created from.
*
- The saved state can not contain dependencies on other fragments --
* that is it can't use {@link #putFragment(Bundle, String, Fragment)} to
* store a fragment reference because that reference may not be valid when
* this saved state is later used. Likewise the Fragment's target and
* result code are not included in this state.
*
*
* @param f The Fragment whose state is to be saved.
* @return The generated state. This will be null if there was no
* interesting state created by the fragment.
*/
public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f);
/**
* Returns true if the final {@link Activity#onDestroy() Activity.onDestroy()}
* call has been made on the FragmentManager's Activity, so this instance is now dead.
*/
public abstract boolean isDestroyed();
/**
* Print the FragmentManager's state into the given stream.
*
* @param prefix Text to print at the front of each line.
* @param fd The raw file descriptor that the dump is being sent to.
* @param writer A PrintWriter to which the dump is to be set.
* @param args Additional arguments to the dump request.
*/
public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args);
/**
* Control whether the framework's internal fragment manager debugging
* logs are turned on. If enabled, you will see output in logcat as
* the framework performs fragment operations.
*/
public static void enableDebugLogging(boolean enabled) {
FragmentManagerImpl.DEBUG = enabled;
}
/**
* Invalidate the attached activity's options menu as necessary.
* This may end up being deferred until we move to the resumed state.
*/
public void invalidateOptionsMenu() { }
}
final class FragmentManagerState implements Parcelable {
FragmentState[] mActive;
int[] mAdded;
BackStackState[] mBackStack;
public FragmentManagerState() {
}
public FragmentManagerState(Parcel in) {
mActive = in.createTypedArray(FragmentState.CREATOR);
mAdded = in.createIntArray();
mBackStack = in.createTypedArray(BackStackState.CREATOR);
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeTypedArray(mActive, flags);
dest.writeIntArray(mAdded);
dest.writeTypedArray(mBackStack, flags);
}
public static final Parcelable.Creator CREATOR
= new Parcelable.Creator() {
public FragmentManagerState createFromParcel(Parcel in) {
return new FragmentManagerState(in);
}
public FragmentManagerState[] newArray(int size) {
return new FragmentManagerState[size];
}
};
}
/**
* Callbacks from FragmentManagerImpl to its container.
*/
interface FragmentContainer {
public View findViewById(int id);
}
/**
* Container for fragments associated with an activity.
*/
final class FragmentManagerImpl extends FragmentManager {
static boolean DEBUG = false;
static final String TAG = "FragmentManager";
static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state";
static final String TARGET_STATE_TAG = "android:target_state";
static final String VIEW_STATE_TAG = "android:view_state";
static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint";
ArrayList mPendingActions;
Runnable[] mTmpActions;
boolean mExecutingActions;
ArrayList mActive;
ArrayList mAdded;
ArrayList mAvailIndices;
ArrayList mBackStack;
ArrayList mCreatedMenus;
// Must be accessed while locked.
ArrayList mBackStackIndices;
ArrayList mAvailBackStackIndices;
ArrayList mBackStackChangeListeners;
int mCurState = Fragment.INITIALIZING;
Activity mActivity;
FragmentContainer mContainer;
Fragment mParent;
boolean mNeedMenuInvalidate;
boolean mStateSaved;
boolean mDestroyed;
String mNoTransactionsBecause;
boolean mHavePendingDeferredStart;
// Temporary vars for state save and restore.
Bundle mStateBundle = null;
SparseArray mStateArray = null;
Runnable mExecCommit = new Runnable() {
@Override
public void run() {
execPendingActions();
}
};
private void throwException(RuntimeException ex) {
Log.e(TAG, ex.getMessage());
LogWriter logw = new LogWriter(Log.ERROR, TAG);
PrintWriter pw = new FastPrintWriter(logw, false, 1024);
if (mActivity != null) {
Log.e(TAG, "Activity state:");
try {
mActivity.dump(" ", null, pw, new String[] { });
} catch (Exception e) {
pw.flush();
Log.e(TAG, "Failed dumping state", e);
}
} else {
Log.e(TAG, "Fragment manager state:");
try {
dump(" ", null, pw, new String[] { });
} catch (Exception e) {
pw.flush();
Log.e(TAG, "Failed dumping state", e);
}
}
pw.flush();
throw ex;
}
@Override
public FragmentTransaction beginTransaction() {
return new BackStackRecord(this);
}
@Override
public boolean executePendingTransactions() {
return execPendingActions();
}
@Override
public void popBackStack() {
enqueueAction(new Runnable() {
@Override public void run() {
popBackStackState(mActivity.mHandler, null, -1, 0);
}
}, false);
}
@Override
public boolean popBackStackImmediate() {
checkStateLoss();
executePendingTransactions();
return popBackStackState(mActivity.mHandler, null, -1, 0);
}
@Override
public void popBackStack(final String name, final int flags) {
enqueueAction(new Runnable() {
@Override public void run() {
popBackStackState(mActivity.mHandler, name, -1, flags);
}
}, false);
}
@Override
public boolean popBackStackImmediate(String name, int flags) {
checkStateLoss();
executePendingTransactions();
return popBackStackState(mActivity.mHandler, name, -1, flags);
}
@Override
public void popBackStack(final int id, final int flags) {
if (id < 0) {
throw new IllegalArgumentException("Bad id: " + id);
}
enqueueAction(new Runnable() {
@Override public void run() {
popBackStackState(mActivity.mHandler, null, id, flags);
}
}, false);
}
@Override
public boolean popBackStackImmediate(int id, int flags) {
checkStateLoss();
executePendingTransactions();
if (id < 0) {
throw new IllegalArgumentException("Bad id: " + id);
}
return popBackStackState(mActivity.mHandler, null, id, flags);
}
@Override
public int getBackStackEntryCount() {
return mBackStack != null ? mBackStack.size() : 0;
}
@Override
public BackStackEntry getBackStackEntryAt(int index) {
return mBackStack.get(index);
}
@Override
public void addOnBackStackChangedListener(OnBackStackChangedListener listener) {
if (mBackStackChangeListeners == null) {
mBackStackChangeListeners = new ArrayList();
}
mBackStackChangeListeners.add(listener);
}
@Override
public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) {
if (mBackStackChangeListeners != null) {
mBackStackChangeListeners.remove(listener);
}
}
@Override
public void putFragment(Bundle bundle, String key, Fragment fragment) {
if (fragment.mIndex < 0) {
throwException(new IllegalStateException("Fragment " + fragment
+ " is not currently in the FragmentManager"));
}
bundle.putInt(key, fragment.mIndex);
}
@Override
public Fragment getFragment(Bundle bundle, String key) {
int index = bundle.getInt(key, -1);
if (index == -1) {
return null;
}
if (index >= mActive.size()) {
throwException(new IllegalStateException("Fragement no longer exists for key "
+ key + ": index " + index));
}
Fragment f = mActive.get(index);
if (f == null) {
throwException(new IllegalStateException("Fragement no longer exists for key "
+ key + ": index " + index));
}
return f;
}
@Override
public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) {
if (fragment.mIndex < 0) {
throwException(new IllegalStateException("Fragment " + fragment
+ " is not currently in the FragmentManager"));
}
if (fragment.mState > Fragment.INITIALIZING) {
Bundle result = saveFragmentBasicState(fragment);
return result != null ? new Fragment.SavedState(result) : null;
}
return null;
}
@Override
public boolean isDestroyed() {
return mDestroyed;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(128);
sb.append("FragmentManager{");
sb.append(Integer.toHexString(System.identityHashCode(this)));
sb.append(" in ");
if (mParent != null) {
DebugUtils.buildShortClassTag(mParent, sb);
} else {
DebugUtils.buildShortClassTag(mActivity, sb);
}
sb.append("}}");
return sb.toString();
}
@Override
public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) {
String innerPrefix = prefix + " ";
int N;
if (mActive != null) {
N = mActive.size();
if (N > 0) {
writer.print(prefix); writer.print("Active Fragments in ");
writer.print(Integer.toHexString(System.identityHashCode(this)));
writer.println(":");
for (int i=0; i 0) {
writer.print(prefix); writer.println("Added Fragments:");
for (int i=0; i 0) {
writer.print(prefix); writer.println("Fragments Created Menus:");
for (int i=0; i 0) {
writer.print(prefix); writer.println("Back Stack:");
for (int i=0; i 0) {
writer.print(prefix); writer.println("Back Stack Indices:");
for (int i=0; i 0) {
writer.print(prefix); writer.print("mAvailBackStackIndices: ");
writer.println(Arrays.toString(mAvailBackStackIndices.toArray()));
}
}
if (mPendingActions != null) {
N = mPendingActions.size();
if (N > 0) {
writer.print(prefix); writer.println("Pending Actions:");
for (int i=0; i Fragment.STOPPED) {
newState = Fragment.STOPPED;
}
}
}
f.mActivity = mActivity;
f.mParentFragment = mParent;
f.mFragmentManager = mParent != null
? mParent.mChildFragmentManager : mActivity.mFragments;
f.mCalled = false;
f.onAttach(mActivity);
if (!f.mCalled) {
throw new SuperNotCalledException("Fragment " + f
+ " did not call through to super.onAttach()");
}
if (f.mParentFragment == null) {
mActivity.onAttachFragment(f);
}
if (!f.mRetaining) {
f.performCreate(f.mSavedFragmentState);
}
f.mRetaining = false;
if (f.mFromLayout) {
// For fragments that are part of the content view
// layout, we need to instantiate the view immediately
// and the inflater will take care of adding it.
f.mView = f.performCreateView(f.getLayoutInflater(
f.mSavedFragmentState), null, f.mSavedFragmentState);
if (f.mView != null) {
f.mView.setSaveFromParentEnabled(false);
if (f.mHidden) f.mView.setVisibility(View.GONE);
f.onViewCreated(f.mView, f.mSavedFragmentState);
}
}
case Fragment.CREATED:
if (newState > Fragment.CREATED) {
if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f);
if (!f.mFromLayout) {
ViewGroup container = null;
if (f.mContainerId != 0) {
container = (ViewGroup)mContainer.findViewById(f.mContainerId);
if (container == null && !f.mRestored) {
throwException(new IllegalArgumentException(
"No view found for id 0x"
+ Integer.toHexString(f.mContainerId) + " ("
+ f.getResources().getResourceName(f.mContainerId)
+ ") for fragment " + f));
}
}
f.mContainer = container;
f.mView = f.performCreateView(f.getLayoutInflater(
f.mSavedFragmentState), container, f.mSavedFragmentState);
if (f.mView != null) {
f.mView.setSaveFromParentEnabled(false);
if (container != null) {
Animator anim = loadAnimator(f, transit, true,
transitionStyle);
if (anim != null) {
anim.setTarget(f.mView);
anim.start();
}
container.addView(f.mView);
}
if (f.mHidden) f.mView.setVisibility(View.GONE);
f.onViewCreated(f.mView, f.mSavedFragmentState);
}
}
f.performActivityCreated(f.mSavedFragmentState);
if (f.mView != null) {
f.restoreViewState(f.mSavedFragmentState);
}
f.mSavedFragmentState = null;
}
case Fragment.ACTIVITY_CREATED:
case Fragment.STOPPED:
if (newState > Fragment.STOPPED) {
if (DEBUG) Log.v(TAG, "moveto STARTED: " + f);
f.performStart();
}
case Fragment.STARTED:
if (newState > Fragment.STARTED) {
if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f);
f.mResumed = true;
f.performResume();
// Get rid of this in case we saved it and never needed it.
f.mSavedFragmentState = null;
f.mSavedViewState = null;
}
}
} else if (f.mState > newState) {
switch (f.mState) {
case Fragment.RESUMED:
if (newState < Fragment.RESUMED) {
if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f);
f.performPause();
f.mResumed = false;
}
case Fragment.STARTED:
if (newState < Fragment.STARTED) {
if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f);
f.performStop();
}
case Fragment.STOPPED:
case Fragment.ACTIVITY_CREATED:
if (newState < Fragment.ACTIVITY_CREATED) {
if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f);
if (f.mView != null) {
// Need to save the current view state if not
// done already.
if (!mActivity.isFinishing() && f.mSavedViewState == null) {
saveFragmentViewState(f);
}
}
f.performDestroyView();
if (f.mView != null && f.mContainer != null) {
Animator anim = null;
if (mCurState > Fragment.INITIALIZING && !mDestroyed) {
anim = loadAnimator(f, transit, false,
transitionStyle);
}
if (anim != null) {
final ViewGroup container = f.mContainer;
final View view = f.mView;
final Fragment fragment = f;
container.startViewTransition(view);
f.mAnimatingAway = anim;
f.mStateAfterAnimating = newState;
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator anim) {
container.endViewTransition(view);
if (fragment.mAnimatingAway != null) {
fragment.mAnimatingAway = null;
moveToState(fragment, fragment.mStateAfterAnimating,
0, 0, false);
}
}
});
anim.setTarget(f.mView);
anim.start();
}
f.mContainer.removeView(f.mView);
}
f.mContainer = null;
f.mView = null;
}
case Fragment.CREATED:
if (newState < Fragment.CREATED) {
if (mDestroyed) {
if (f.mAnimatingAway != null) {
// The fragment's containing activity is
// being destroyed, but this fragment is
// currently animating away. Stop the
// animation right now -- it is not needed,
// and we can't wait any more on destroying
// the fragment.
Animator anim = f.mAnimatingAway;
f.mAnimatingAway = null;
anim.cancel();
}
}
if (f.mAnimatingAway != null) {
// We are waiting for the fragment's view to finish
// animating away. Just make a note of the state
// the fragment now should move to once the animation
// is done.
f.mStateAfterAnimating = newState;
newState = Fragment.CREATED;
} else {
if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f);
if (!f.mRetaining) {
f.performDestroy();
}
f.mCalled = false;
f.onDetach();
if (!f.mCalled) {
throw new SuperNotCalledException("Fragment " + f
+ " did not call through to super.onDetach()");
}
if (!keepActive) {
if (!f.mRetaining) {
makeInactive(f);
} else {
f.mActivity = null;
f.mParentFragment = null;
f.mFragmentManager = null;
}
}
}
}
}
}
f.mState = newState;
}
void moveToState(Fragment f) {
moveToState(f, mCurState, 0, 0, false);
}
void moveToState(int newState, boolean always) {
moveToState(newState, 0, 0, always);
}
void moveToState(int newState, int transit, int transitStyle, boolean always) {
if (mActivity == null && newState != Fragment.INITIALIZING) {
throw new IllegalStateException("No activity");
}
if (!always && mCurState == newState) {
return;
}
mCurState = newState;
if (mActive != null) {
boolean loadersRunning = false;
for (int i=0; i= 0) {
return;
}
if (mAvailIndices == null || mAvailIndices.size() <= 0) {
if (mActive == null) {
mActive = new ArrayList();
}
f.setIndex(mActive.size(), mParent);
mActive.add(f);
} else {
f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent);
mActive.set(f.mIndex, f);
}
if (DEBUG) Log.v(TAG, "Allocated fragment index " + f);
}
void makeInactive(Fragment f) {
if (f.mIndex < 0) {
return;
}
if (DEBUG) Log.v(TAG, "Freeing fragment index " + f);
mActive.set(f.mIndex, null);
if (mAvailIndices == null) {
mAvailIndices = new ArrayList();
}
mAvailIndices.add(f.mIndex);
mActivity.invalidateFragment(f.mWho);
f.initState();
}
public void addFragment(Fragment fragment, boolean moveToStateNow) {
if (mAdded == null) {
mAdded = new ArrayList();
}
if (DEBUG) Log.v(TAG, "add: " + fragment);
makeActive(fragment);
if (!fragment.mDetached) {
if (mAdded.contains(fragment)) {
throw new IllegalStateException("Fragment already added: " + fragment);
}
mAdded.add(fragment);
fragment.mAdded = true;
fragment.mRemoving = false;
if (fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
if (moveToStateNow) {
moveToState(fragment);
}
}
}
public void removeFragment(Fragment fragment, int transition, int transitionStyle) {
if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting);
final boolean inactive = !fragment.isInBackStack();
if (!fragment.mDetached || inactive) {
if (false) {
// Would be nice to catch a bad remove here, but we need
// time to test this to make sure we aren't crashes cases
// where it is not a problem.
if (!mAdded.contains(fragment)) {
throw new IllegalStateException("Fragment not added: " + fragment);
}
}
if (mAdded != null) {
mAdded.remove(fragment);
}
if (fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
fragment.mAdded = false;
fragment.mRemoving = true;
moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED,
transition, transitionStyle, false);
}
}
public void hideFragment(Fragment fragment, int transition, int transitionStyle) {
if (DEBUG) Log.v(TAG, "hide: " + fragment);
if (!fragment.mHidden) {
fragment.mHidden = true;
if (fragment.mView != null) {
Animator anim = loadAnimator(fragment, transition, false,
transitionStyle);
if (anim != null) {
anim.setTarget(fragment.mView);
// Delay the actual hide operation until the animation finishes, otherwise
// the fragment will just immediately disappear
final Fragment finalFragment = fragment;
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
if (finalFragment.mView != null) {
finalFragment.mView.setVisibility(View.GONE);
}
}
});
anim.start();
} else {
fragment.mView.setVisibility(View.GONE);
}
}
if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
fragment.onHiddenChanged(true);
}
}
public void showFragment(Fragment fragment, int transition, int transitionStyle) {
if (DEBUG) Log.v(TAG, "show: " + fragment);
if (fragment.mHidden) {
fragment.mHidden = false;
if (fragment.mView != null) {
Animator anim = loadAnimator(fragment, transition, true,
transitionStyle);
if (anim != null) {
anim.setTarget(fragment.mView);
anim.start();
}
fragment.mView.setVisibility(View.VISIBLE);
}
if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
fragment.onHiddenChanged(false);
}
}
public void detachFragment(Fragment fragment, int transition, int transitionStyle) {
if (DEBUG) Log.v(TAG, "detach: " + fragment);
if (!fragment.mDetached) {
fragment.mDetached = true;
if (fragment.mAdded) {
// We are not already in back stack, so need to remove the fragment.
if (mAdded != null) {
if (DEBUG) Log.v(TAG, "remove from detach: " + fragment);
mAdded.remove(fragment);
}
if (fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
fragment.mAdded = false;
moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false);
}
}
}
public void attachFragment(Fragment fragment, int transition, int transitionStyle) {
if (DEBUG) Log.v(TAG, "attach: " + fragment);
if (fragment.mDetached) {
fragment.mDetached = false;
if (!fragment.mAdded) {
if (mAdded == null) {
mAdded = new ArrayList();
}
if (mAdded.contains(fragment)) {
throw new IllegalStateException("Fragment already added: " + fragment);
}
if (DEBUG) Log.v(TAG, "add from attach: " + fragment);
mAdded.add(fragment);
fragment.mAdded = true;
if (fragment.mHasMenu && fragment.mMenuVisible) {
mNeedMenuInvalidate = true;
}
moveToState(fragment, mCurState, transition, transitionStyle, false);
}
}
}
public Fragment findFragmentById(int id) {
if (mAdded != null) {
// First look through added fragments.
for (int i=mAdded.size()-1; i>=0; i--) {
Fragment f = mAdded.get(i);
if (f != null && f.mFragmentId == id) {
return f;
}
}
}
if (mActive != null) {
// Now for any known fragment.
for (int i=mActive.size()-1; i>=0; i--) {
Fragment f = mActive.get(i);
if (f != null && f.mFragmentId == id) {
return f;
}
}
}
return null;
}
public Fragment findFragmentByTag(String tag) {
if (mAdded != null && tag != null) {
// First look through added fragments.
for (int i=mAdded.size()-1; i>=0; i--) {
Fragment f = mAdded.get(i);
if (f != null && tag.equals(f.mTag)) {
return f;
}
}
}
if (mActive != null && tag != null) {
// Now for any known fragment.
for (int i=mActive.size()-1; i>=0; i--) {
Fragment f = mActive.get(i);
if (f != null && tag.equals(f.mTag)) {
return f;
}
}
}
return null;
}
public Fragment findFragmentByWho(String who) {
if (mActive != null && who != null) {
for (int i=mActive.size()-1; i>=0; i--) {
Fragment f = mActive.get(i);
if (f != null && (f=f.findFragmentByWho(who)) != null) {
return f;
}
}
}
return null;
}
private void checkStateLoss() {
if (mStateSaved) {
throw new IllegalStateException(
"Can not perform this action after onSaveInstanceState");
}
if (mNoTransactionsBecause != null) {
throw new IllegalStateException(
"Can not perform this action inside of " + mNoTransactionsBecause);
}
}
/**
* Adds an action to the queue of pending actions.
*
* @param action the action to add
* @param allowStateLoss whether to allow loss of state information
* @throws IllegalStateException if the activity has been destroyed
*/
public void enqueueAction(Runnable action, boolean allowStateLoss) {
if (!allowStateLoss) {
checkStateLoss();
}
synchronized (this) {
if (mDestroyed || mActivity == null) {
throw new IllegalStateException("Activity has been destroyed");
}
if (mPendingActions == null) {
mPendingActions = new ArrayList();
}
mPendingActions.add(action);
if (mPendingActions.size() == 1) {
mActivity.mHandler.removeCallbacks(mExecCommit);
mActivity.mHandler.post(mExecCommit);
}
}
}
public int allocBackStackIndex(BackStackRecord bse) {
synchronized (this) {
if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) {
if (mBackStackIndices == null) {
mBackStackIndices = new ArrayList();
}
int index = mBackStackIndices.size();
if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse);
mBackStackIndices.add(bse);
return index;
} else {
int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1);
if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse);
mBackStackIndices.set(index, bse);
return index;
}
}
}
public void setBackStackIndex(int index, BackStackRecord bse) {
synchronized (this) {
if (mBackStackIndices == null) {
mBackStackIndices = new ArrayList();
}
int N = mBackStackIndices.size();
if (index < N) {
if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse);
mBackStackIndices.set(index, bse);
} else {
while (N < index) {
mBackStackIndices.add(null);
if (mAvailBackStackIndices == null) {
mAvailBackStackIndices = new ArrayList();
}
if (DEBUG) Log.v(TAG, "Adding available back stack index " + N);
mAvailBackStackIndices.add(N);
N++;
}
if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse);
mBackStackIndices.add(bse);
}
}
}
public void freeBackStackIndex(int index) {
synchronized (this) {
mBackStackIndices.set(index, null);
if (mAvailBackStackIndices == null) {
mAvailBackStackIndices = new ArrayList();
}
if (DEBUG) Log.v(TAG, "Freeing back stack index " + index);
mAvailBackStackIndices.add(index);
}
}
/**
* Only call from main thread!
*/
public boolean execPendingActions() {
if (mExecutingActions) {
throw new IllegalStateException("Recursive entry to executePendingTransactions");
}
if (Looper.myLooper() != mActivity.mHandler.getLooper()) {
throw new IllegalStateException("Must be called from main thread of process");
}
boolean didSomething = false;
while (true) {
int numActions;
synchronized (this) {
if (mPendingActions == null || mPendingActions.size() == 0) {
break;
}
numActions = mPendingActions.size();
if (mTmpActions == null || mTmpActions.length < numActions) {
mTmpActions = new Runnable[numActions];
}
mPendingActions.toArray(mTmpActions);
mPendingActions.clear();
mActivity.mHandler.removeCallbacks(mExecCommit);
}
mExecutingActions = true;
for (int i=0; i();
}
mBackStack.add(state);
reportBackStackChanged();
}
boolean popBackStackState(Handler handler, String name, int id, int flags) {
if (mBackStack == null) {
return false;
}
if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) {
int last = mBackStack.size()-1;
if (last < 0) {
return false;
}
final BackStackRecord bss = mBackStack.remove(last);
bss.popFromBackStack(true);
reportBackStackChanged();
} else {
int index = -1;
if (name != null || id >= 0) {
// If a name or ID is specified, look for that place in
// the stack.
index = mBackStack.size()-1;
while (index >= 0) {
BackStackRecord bss = mBackStack.get(index);
if (name != null && name.equals(bss.getName())) {
break;
}
if (id >= 0 && id == bss.mIndex) {
break;
}
index--;
}
if (index < 0) {
return false;
}
if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) {
index--;
// Consume all following entries that match.
while (index >= 0) {
BackStackRecord bss = mBackStack.get(index);
if ((name != null && name.equals(bss.getName()))
|| (id >= 0 && id == bss.mIndex)) {
index--;
continue;
}
break;
}
}
}
if (index == mBackStack.size()-1) {
return false;
}
final ArrayList states
= new ArrayList();
for (int i=mBackStack.size()-1; i>index; i--) {
states.add(mBackStack.remove(i));
}
final int LAST = states.size()-1;
for (int i=0; i<=LAST; i++) {
if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i));
states.get(i).popFromBackStack(i == LAST);
}
reportBackStackChanged();
}
return true;
}
ArrayList retainNonConfig() {
ArrayList fragments = null;
if (mActive != null) {
for (int i=0; i();
}
fragments.add(f);
f.mRetaining = true;
f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1;
if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f);
}
}
}
return fragments;
}
void saveFragmentViewState(Fragment f) {
if (f.mView == null) {
return;
}
if (mStateArray == null) {
mStateArray = new SparseArray();
} else {
mStateArray.clear();
}
f.mView.saveHierarchyState(mStateArray);
if (mStateArray.size() > 0) {
f.mSavedViewState = mStateArray;
mStateArray = null;
}
}
Bundle saveFragmentBasicState(Fragment f) {
Bundle result = null;
if (mStateBundle == null) {
mStateBundle = new Bundle();
}
f.performSaveInstanceState(mStateBundle);
if (!mStateBundle.isEmpty()) {
result = mStateBundle;
mStateBundle = null;
}
if (f.mView != null) {
saveFragmentViewState(f);
}
if (f.mSavedViewState != null) {
if (result == null) {
result = new Bundle();
}
result.putSparseParcelableArray(
FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState);
}
if (!f.mUserVisibleHint) {
if (result == null) {
result = new Bundle();
}
// Only add this if it's not the default value
result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint);
}
return result;
}
Parcelable saveAllState() {
// Make sure all pending operations have now been executed to get
// our state update-to-date.
execPendingActions();
mStateSaved = true;
if (mActive == null || mActive.size() <= 0) {
return null;
}
// First collect all active fragments.
int N = mActive.size();
FragmentState[] active = new FragmentState[N];
boolean haveFragments = false;
for (int i=0; i Fragment.INITIALIZING && fs.mSavedFragmentState == null) {
fs.mSavedFragmentState = saveFragmentBasicState(f);
if (f.mTarget != null) {
if (f.mTarget.mIndex < 0) {
throwException(new IllegalStateException(
"Failure saving state: " + f
+ " has target not in fragment manager: " + f.mTarget));
}
if (fs.mSavedFragmentState == null) {
fs.mSavedFragmentState = new Bundle();
}
putFragment(fs.mSavedFragmentState,
FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget);
if (f.mTargetRequestCode != 0) {
fs.mSavedFragmentState.putInt(
FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG,
f.mTargetRequestCode);
}
}
} else {
fs.mSavedFragmentState = f.mSavedFragmentState;
}
if (DEBUG) Log.v(TAG, "Saved state of " + f + ": "
+ fs.mSavedFragmentState);
}
}
if (!haveFragments) {
if (DEBUG) Log.v(TAG, "saveAllState: no fragments!");
return null;
}
int[] added = null;
BackStackState[] backStack = null;
// Build list of currently added fragments.
if (mAdded != null) {
N = mAdded.size();
if (N > 0) {
added = new int[N];
for (int i=0; i 0) {
backStack = new BackStackState[N];
for (int i=0; i nonConfig) {
// If there is no saved state at all, then there can not be
// any nonConfig fragments either, so that is that.
if (state == null) return;
FragmentManagerState fms = (FragmentManagerState)state;
if (fms.mActive == null) return;
// First re-attach any non-config instances we are retaining back
// to their saved state, so we don't try to instantiate them again.
if (nonConfig != null) {
for (int i=0; i(fms.mActive.length);
if (mAvailIndices != null) {
mAvailIndices.clear();
}
for (int i=0; i();
}
if (DEBUG) Log.v(TAG, "restoreAllState: avail #" + i);
mAvailIndices.add(i);
}
}
// Update the target of all retained fragments.
if (nonConfig != null) {
for (int i=0; i= 0) {
if (f.mTargetIndex < mActive.size()) {
f.mTarget = mActive.get(f.mTargetIndex);
} else {
Log.w(TAG, "Re-attaching retained fragment " + f
+ " target no longer exists: " + f.mTargetIndex);
f.mTarget = null;
}
}
}
}
// Build the list of currently added fragments.
if (fms.mAdded != null) {
mAdded = new ArrayList(fms.mAdded.length);
for (int i=0; i(fms.mBackStack.length);
for (int i=0; i= 0) {
setBackStackIndex(bse.mIndex, bse);
}
}
} else {
mBackStack = null;
}
}
public void attachActivity(Activity activity, FragmentContainer container, Fragment parent) {
if (mActivity != null) throw new IllegalStateException("Already attached");
mActivity = activity;
mContainer = container;
mParent = parent;
}
public void noteStateNotSaved() {
mStateSaved = false;
}
public void dispatchCreate() {
mStateSaved = false;
moveToState(Fragment.CREATED, false);
}
public void dispatchActivityCreated() {
mStateSaved = false;
moveToState(Fragment.ACTIVITY_CREATED, false);
}
public void dispatchStart() {
mStateSaved = false;
moveToState(Fragment.STARTED, false);
}
public void dispatchResume() {
mStateSaved = false;
moveToState(Fragment.RESUMED, false);
}
public void dispatchPause() {
moveToState(Fragment.STARTED, false);
}
public void dispatchStop() {
moveToState(Fragment.STOPPED, false);
}
public void dispatchDestroyView() {
moveToState(Fragment.CREATED, false);
}
public void dispatchDestroy() {
mDestroyed = true;
execPendingActions();
moveToState(Fragment.INITIALIZING, false);
mActivity = null;
mContainer = null;
mParent = null;
}
public void dispatchConfigurationChanged(Configuration newConfig) {
if (mAdded != null) {
for (int i=0; i newMenus = null;
if (mAdded != null) {
for (int i=0; i();
}
newMenus.add(f);
}
}
}
}
if (mCreatedMenus != null) {
for (int i=0; i