FragmentManager.java revision ff22d81f6561f6cdd2a91eb63238c41079927a22
10d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks/* 20d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * Copyright (C) 2011 The Android Open Source Project 30d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * 40d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * Licensed under the Apache License, Version 2.0 (the "License"); 50d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * you may not use this file except in compliance with the License. 60d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * You may obtain a copy of the License at 70d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * 80d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * http://www.apache.org/licenses/LICENSE-2.0 90d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * 100d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * Unless required by applicable law or agreed to in writing, software 110d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * distributed under the License is distributed on an "AS IS" BASIS, 120d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 130d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * See the License for the specific language governing permissions and 140d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * limitations under the License. 150d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks */ 160d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks 170d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubankspackage android.support.v4.app; 180d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks 190d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.content.Context; 200d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.content.res.Configuration; 210d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.content.res.Resources.NotFoundException; 220d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.content.res.TypedArray; 230d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Build; 240d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Bundle; 250d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Handler; 260d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Looper; 270d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Parcel; 280d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.os.Parcelable; 290d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.annotation.CallSuper; 300d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.annotation.IdRes; 310d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.annotation.StringRes; 320d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.v4.os.BuildCompat; 330d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.v4.util.DebugUtils; 340d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.v4.util.LogWriter; 350d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.v4.view.LayoutInflaterFactory; 360d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.support.v4.view.ViewCompat; 370d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.util.AttributeSet; 380d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.util.Log; 390d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.util.SparseArray; 400d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.AccelerateInterpolator; 410d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.AlphaAnimation; 420d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.Animation; 430d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.AnimationSet; 440d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.AnimationUtils; 450d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.DecelerateInterpolator; 460d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.Interpolator; 470d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.ScaleAnimation; 480d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.animation.Animation.AnimationListener; 490d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.Menu; 500d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.MenuInflater; 510d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.MenuItem; 520d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.View; 530d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport android.view.ViewGroup; 540d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks 550d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.io.FileDescriptor; 560d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.io.PrintWriter; 570d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.lang.reflect.Field; 580d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.util.ArrayList; 590d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.util.Arrays; 600d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanksimport java.util.List; 610d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks 620d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks/** 630d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * Static library support version of the framework's {@link android.app.FragmentManager}. 640d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * Used to write apps that run on platforms prior to Android 3.0. When running 650d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * on Android 3.0 or above, this implementation is still used; it does not try 660d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * to switch to the framework's implementation. See the framework {@link FragmentManager} 670d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * documentation for a class overview. 680d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * 690d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * <p>Your activity must derive from {@link FragmentActivity} to use this. From such an activity, 700d13f3929129bf7e34bde1ed3670195c37a180ebArthur Eubanks * you can acquire the {@link FragmentManager} by calling 71 * {@link FragmentActivity#getSupportFragmentManager}. 72 */ 73public abstract class FragmentManager { 74 /** 75 * Representation of an entry on the fragment back stack, as created 76 * with {@link FragmentTransaction#addToBackStack(String) 77 * FragmentTransaction.addToBackStack()}. Entries can later be 78 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 79 * FragmentManager.getBackStackEntry()}. 80 * 81 * <p>Note that you should never hold on to a BackStackEntry object; 82 * the identifier as returned by {@link #getId} is the only thing that 83 * will be persisted across activity instances. 84 */ 85 public interface BackStackEntry { 86 /** 87 * Return the unique identifier for the entry. This is the only 88 * representation of the entry that will persist across activity 89 * instances. 90 */ 91 public int getId(); 92 93 /** 94 * Get the name that was supplied to 95 * {@link FragmentTransaction#addToBackStack(String) 96 * FragmentTransaction.addToBackStack(String)} when creating this entry. 97 */ 98 public String getName(); 99 100 /** 101 * Return the full bread crumb title resource identifier for the entry, 102 * or 0 if it does not have one. 103 */ 104 @StringRes 105 public int getBreadCrumbTitleRes(); 106 107 /** 108 * Return the short bread crumb title resource identifier for the entry, 109 * or 0 if it does not have one. 110 */ 111 @StringRes 112 public int getBreadCrumbShortTitleRes(); 113 114 /** 115 * Return the full bread crumb title for the entry, or null if it 116 * does not have one. 117 */ 118 public CharSequence getBreadCrumbTitle(); 119 120 /** 121 * Return the short bread crumb title for the entry, or null if it 122 * does not have one. 123 */ 124 public CharSequence getBreadCrumbShortTitle(); 125 } 126 127 /** 128 * Interface to watch for changes to the back stack. 129 */ 130 public interface OnBackStackChangedListener { 131 /** 132 * Called whenever the contents of the back stack change. 133 */ 134 public void onBackStackChanged(); 135 } 136 137 /** 138 * Start a series of edit operations on the Fragments associated with 139 * this FragmentManager. 140 * 141 * <p>Note: A fragment transaction can only be created/committed prior 142 * to an activity saving its state. If you try to commit a transaction 143 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 144 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 145 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 146 * This is because the framework takes care of saving your current fragments 147 * in the state, and if changes are made after the state is saved then they 148 * will be lost.</p> 149 */ 150 public abstract FragmentTransaction beginTransaction(); 151 152 /** 153 * @hide -- remove once prebuilts are in. 154 * @deprecated 155 */ 156 @Deprecated 157 public FragmentTransaction openTransaction() { 158 return beginTransaction(); 159 } 160 161 /** 162 * After a {@link FragmentTransaction} is committed with 163 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 164 * is scheduled to be executed asynchronously on the process's main thread. 165 * If you want to immediately executing any such pending operations, you 166 * can call this function (only from the main thread) to do so. Note that 167 * all callbacks and other related behavior will be done from within this 168 * call, so be careful about where this is called from. 169 * 170 * <p>If you are committing a single transaction that does not modify the 171 * fragment back stack, strongly consider using 172 * {@link FragmentTransaction#commitNow()} instead. This can help avoid 173 * unwanted side effects when other code in your app has pending committed 174 * transactions that expect different timing.</p> 175 * 176 * @return Returns true if there were any pending transactions to be 177 * executed. 178 */ 179 public abstract boolean executePendingTransactions(); 180 181 /** 182 * Finds a fragment that was identified by the given id either when inflated 183 * from XML or as the container ID when added in a transaction. This first 184 * searches through fragments that are currently added to the manager's 185 * activity; if no such fragment is found, then all fragments currently 186 * on the back stack associated with this ID are searched. 187 * @return The fragment if found or null otherwise. 188 */ 189 public abstract Fragment findFragmentById(@IdRes int id); 190 191 /** 192 * Finds a fragment that was identified by the given tag either when inflated 193 * from XML or as supplied when added in a transaction. This first 194 * searches through fragments that are currently added to the manager's 195 * activity; if no such fragment is found, then all fragments currently 196 * on the back stack are searched. 197 * @return The fragment if found or null otherwise. 198 */ 199 public abstract Fragment findFragmentByTag(String tag); 200 201 /** 202 * Flag for {@link #popBackStack(String, int)} 203 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 204 * a back stack entry has been supplied, then all matching entries will 205 * be consumed until one that doesn't match is found or the bottom of 206 * the stack is reached. Otherwise, all entries up to but not including that entry 207 * will be removed. 208 */ 209 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 210 211 /** 212 * Pop the top state off the back stack. Returns true if there was one 213 * to pop, else false. This function is asynchronous -- it enqueues the 214 * request to pop, but the action will not be performed until the application 215 * returns to its event loop. 216 */ 217 public abstract void popBackStack(); 218 219 /** 220 * Like {@link #popBackStack()}, but performs the operation immediately 221 * inside of the call. This is like calling {@link #executePendingTransactions()} 222 * afterwards. 223 * @return Returns true if there was something popped, else false. 224 */ 225 public abstract boolean popBackStackImmediate(); 226 227 /** 228 * Pop the last fragment transition from the manager's fragment 229 * back stack. If there is nothing to pop, false is returned. 230 * This function is asynchronous -- it enqueues the 231 * request to pop, but the action will not be performed until the application 232 * returns to its event loop. 233 * 234 * @param name If non-null, this is the name of a previous back state 235 * to look for; if found, all states up to that state will be popped. The 236 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 237 * the named state itself is popped. If null, only the top state is popped. 238 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 239 */ 240 public abstract void popBackStack(String name, int flags); 241 242 /** 243 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 244 * inside of the call. This is like calling {@link #executePendingTransactions()} 245 * afterwards. 246 * @return Returns true if there was something popped, else false. 247 */ 248 public abstract boolean popBackStackImmediate(String name, int flags); 249 250 /** 251 * Pop all back stack states up to the one with the given identifier. 252 * This function is asynchronous -- it enqueues the 253 * request to pop, but the action will not be performed until the application 254 * returns to its event loop. 255 * 256 * @param id Identifier of the stated to be popped. If no identifier exists, 257 * false is returned. 258 * The identifier is the number returned by 259 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 260 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 261 * the named state itself is popped. 262 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 263 */ 264 public abstract void popBackStack(int id, int flags); 265 266 /** 267 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 268 * inside of the call. This is like calling {@link #executePendingTransactions()} 269 * afterwards. 270 * @return Returns true if there was something popped, else false. 271 */ 272 public abstract boolean popBackStackImmediate(int id, int flags); 273 274 /** 275 * Return the number of entries currently in the back stack. 276 */ 277 public abstract int getBackStackEntryCount(); 278 279 /** 280 * Return the BackStackEntry at index <var>index</var> in the back stack; 281 * entries start index 0 being the bottom of the stack. 282 */ 283 public abstract BackStackEntry getBackStackEntryAt(int index); 284 285 /** 286 * Add a new listener for changes to the fragment back stack. 287 */ 288 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 289 290 /** 291 * Remove a listener that was previously added with 292 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 293 */ 294 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 295 296 /** 297 * Put a reference to a fragment in a Bundle. This Bundle can be 298 * persisted as saved state, and when later restoring 299 * {@link #getFragment(Bundle, String)} will return the current 300 * instance of the same fragment. 301 * 302 * @param bundle The bundle in which to put the fragment reference. 303 * @param key The name of the entry in the bundle. 304 * @param fragment The Fragment whose reference is to be stored. 305 */ 306 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 307 308 /** 309 * Retrieve the current Fragment instance for a reference previously 310 * placed with {@link #putFragment(Bundle, String, Fragment)}. 311 * 312 * @param bundle The bundle from which to retrieve the fragment reference. 313 * @param key The name of the entry in the bundle. 314 * @return Returns the current Fragment instance that is associated with 315 * the given reference. 316 */ 317 public abstract Fragment getFragment(Bundle bundle, String key); 318 319 /** 320 * Get a list of all fragments that have been added to the fragment manager. 321 * 322 * @return The list of all fragments or null if none. 323 * @hide 324 */ 325 public abstract List<Fragment> getFragments(); 326 327 /** 328 * Save the current instance state of the given Fragment. This can be 329 * used later when creating a new instance of the Fragment and adding 330 * it to the fragment manager, to have it create itself to match the 331 * current state returned here. Note that there are limits on how 332 * this can be used: 333 * 334 * <ul> 335 * <li>The Fragment must currently be attached to the FragmentManager. 336 * <li>A new Fragment created using this saved state must be the same class 337 * type as the Fragment it was created from. 338 * <li>The saved state can not contain dependencies on other fragments -- 339 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 340 * store a fragment reference because that reference may not be valid when 341 * this saved state is later used. Likewise the Fragment's target and 342 * result code are not included in this state. 343 * </ul> 344 * 345 * @param f The Fragment whose state is to be saved. 346 * @return The generated state. This will be null if there was no 347 * interesting state created by the fragment. 348 */ 349 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 350 351 /** 352 * Returns true if the final {@link android.app.Activity#onDestroy() Activity.onDestroy()} 353 * call has been made on the FragmentManager's Activity, so this instance is now dead. 354 */ 355 public abstract boolean isDestroyed(); 356 357 /** 358 * Print the FragmentManager's state into the given stream. 359 * 360 * @param prefix Text to print at the front of each line. 361 * @param fd The raw file descriptor that the dump is being sent to. 362 * @param writer A PrintWriter to which the dump is to be set. 363 * @param args Additional arguments to the dump request. 364 */ 365 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 366 367 /** 368 * Control whether the framework's internal fragment manager debugging 369 * logs are turned on. If enabled, you will see output in logcat as 370 * the framework performs fragment operations. 371 */ 372 public static void enableDebugLogging(boolean enabled) { 373 FragmentManagerImpl.DEBUG = enabled; 374 } 375} 376 377final class FragmentManagerState implements Parcelable { 378 FragmentState[] mActive; 379 int[] mAdded; 380 BackStackState[] mBackStack; 381 382 public FragmentManagerState() { 383 } 384 385 public FragmentManagerState(Parcel in) { 386 mActive = in.createTypedArray(FragmentState.CREATOR); 387 mAdded = in.createIntArray(); 388 mBackStack = in.createTypedArray(BackStackState.CREATOR); 389 } 390 391 public int describeContents() { 392 return 0; 393 } 394 395 public void writeToParcel(Parcel dest, int flags) { 396 dest.writeTypedArray(mActive, flags); 397 dest.writeIntArray(mAdded); 398 dest.writeTypedArray(mBackStack, flags); 399 } 400 401 public static final Parcelable.Creator<FragmentManagerState> CREATOR 402 = new Parcelable.Creator<FragmentManagerState>() { 403 public FragmentManagerState createFromParcel(Parcel in) { 404 return new FragmentManagerState(in); 405 } 406 407 public FragmentManagerState[] newArray(int size) { 408 return new FragmentManagerState[size]; 409 } 410 }; 411} 412 413/** 414 * Container for fragments associated with an activity. 415 */ 416final class FragmentManagerImpl extends FragmentManager implements LayoutInflaterFactory { 417 static boolean DEBUG = false; 418 static final String TAG = "FragmentManager"; 419 420 static final boolean HONEYCOMB = android.os.Build.VERSION.SDK_INT >= 11; 421 422 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 423 static final String TARGET_STATE_TAG = "android:target_state"; 424 static final String VIEW_STATE_TAG = "android:view_state"; 425 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 426 427 static class AnimateOnHWLayerIfNeededListener implements AnimationListener { 428 private AnimationListener mOrignalListener; 429 private boolean mShouldRunOnHWLayer; 430 private View mView; 431 432 public AnimateOnHWLayerIfNeededListener(final View v, Animation anim) { 433 if (v == null || anim == null) { 434 return; 435 } 436 mView = v; 437 } 438 439 public AnimateOnHWLayerIfNeededListener(final View v, Animation anim, 440 AnimationListener listener) { 441 if (v == null || anim == null) { 442 return; 443 } 444 mOrignalListener = listener; 445 mView = v; 446 mShouldRunOnHWLayer = true; 447 } 448 449 @Override 450 @CallSuper 451 public void onAnimationStart(Animation animation) { 452 if (mOrignalListener != null) { 453 mOrignalListener.onAnimationStart(animation); 454 } 455 } 456 457 @Override 458 @CallSuper 459 public void onAnimationEnd(Animation animation) { 460 if (mView != null && mShouldRunOnHWLayer) { 461 // If we're attached to a window, assume we're in the normal performTraversals 462 // drawing path for Animations running. It's not safe to change the layer type 463 // during drawing, so post it to the View to run later. If we're not attached 464 // or we're running on N and above, post it to the view. If we're not on N and 465 // not attached, do it right now since existing platform versions don't run the 466 // hwui renderer for detached views off the UI thread making changing layer type 467 // safe, but posting may not be. 468 // Prior to N posting to a detached view from a non-Looper thread could cause 469 // leaks, since the thread-local run queue on a non-Looper thread would never 470 // be flushed. 471 if (ViewCompat.isAttachedToWindow(mView) || BuildCompat.isAtLeastN()) { 472 mView.post(new Runnable() { 473 @Override 474 public void run() { 475 ViewCompat.setLayerType(mView, ViewCompat.LAYER_TYPE_NONE, null); 476 } 477 }); 478 } else { 479 ViewCompat.setLayerType(mView, ViewCompat.LAYER_TYPE_NONE, null); 480 } 481 } 482 if (mOrignalListener != null) { 483 mOrignalListener.onAnimationEnd(animation); 484 } 485 } 486 487 @Override 488 public void onAnimationRepeat(Animation animation) { 489 if (mOrignalListener != null) { 490 mOrignalListener.onAnimationRepeat(animation); 491 } 492 } 493 } 494 495 ArrayList<Runnable> mPendingActions; 496 Runnable[] mTmpActions; 497 boolean mExecutingActions; 498 499 ArrayList<Fragment> mActive; 500 ArrayList<Fragment> mAdded; 501 ArrayList<Integer> mAvailIndices; 502 ArrayList<BackStackRecord> mBackStack; 503 ArrayList<Fragment> mCreatedMenus; 504 505 // Must be accessed while locked. 506 ArrayList<BackStackRecord> mBackStackIndices; 507 ArrayList<Integer> mAvailBackStackIndices; 508 509 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 510 511 int mCurState = Fragment.INITIALIZING; 512 FragmentHostCallback mHost; 513 FragmentController mController; 514 FragmentContainer mContainer; 515 Fragment mParent; 516 517 static Field sAnimationListenerField = null; 518 519 boolean mNeedMenuInvalidate; 520 boolean mStateSaved; 521 boolean mDestroyed; 522 String mNoTransactionsBecause; 523 boolean mHavePendingDeferredStart; 524 525 // Temporary vars for state save and restore. 526 Bundle mStateBundle = null; 527 SparseArray<Parcelable> mStateArray = null; 528 529 Runnable mExecCommit = new Runnable() { 530 @Override 531 public void run() { 532 execPendingActions(); 533 } 534 }; 535 536 static boolean modifiesAlpha(Animation anim) { 537 if (anim instanceof AlphaAnimation) { 538 return true; 539 } else if (anim instanceof AnimationSet) { 540 List<Animation> anims = ((AnimationSet) anim).getAnimations(); 541 for (int i = 0; i < anims.size(); i++) { 542 if (anims.get(i) instanceof AlphaAnimation) { 543 return true; 544 } 545 } 546 } 547 return false; 548 } 549 550 static boolean shouldRunOnHWLayer(View v, Animation anim) { 551 return Build.VERSION.SDK_INT >= 19 552 && ViewCompat.getLayerType(v) == ViewCompat.LAYER_TYPE_NONE 553 && ViewCompat.hasOverlappingRendering(v) 554 && modifiesAlpha(anim); 555 } 556 557 private void throwException(RuntimeException ex) { 558 Log.e(TAG, ex.getMessage()); 559 Log.e(TAG, "Activity state:"); 560 LogWriter logw = new LogWriter(TAG); 561 PrintWriter pw = new PrintWriter(logw); 562 if (mHost != null) { 563 try { 564 mHost.onDump(" ", null, pw, new String[] { }); 565 } catch (Exception e) { 566 Log.e(TAG, "Failed dumping state", e); 567 } 568 } else { 569 try { 570 dump(" ", null, pw, new String[] { }); 571 } catch (Exception e) { 572 Log.e(TAG, "Failed dumping state", e); 573 } 574 } 575 throw ex; 576 } 577 578 @Override 579 public FragmentTransaction beginTransaction() { 580 return new BackStackRecord(this); 581 } 582 583 @Override 584 public boolean executePendingTransactions() { 585 return execPendingActions(); 586 } 587 588 @Override 589 public void popBackStack() { 590 enqueueAction(new Runnable() { 591 @Override public void run() { 592 popBackStackState(mHost.getHandler(), null, -1, 0); 593 } 594 }, false); 595 } 596 597 @Override 598 public boolean popBackStackImmediate() { 599 checkStateLoss(); 600 executePendingTransactions(); 601 return popBackStackState(mHost.getHandler(), null, -1, 0); 602 } 603 604 @Override 605 public void popBackStack(final String name, final int flags) { 606 enqueueAction(new Runnable() { 607 @Override public void run() { 608 popBackStackState(mHost.getHandler(), name, -1, flags); 609 } 610 }, false); 611 } 612 613 @Override 614 public boolean popBackStackImmediate(String name, int flags) { 615 checkStateLoss(); 616 executePendingTransactions(); 617 return popBackStackState(mHost.getHandler(), name, -1, flags); 618 } 619 620 @Override 621 public void popBackStack(final int id, final int flags) { 622 if (id < 0) { 623 throw new IllegalArgumentException("Bad id: " + id); 624 } 625 enqueueAction(new Runnable() { 626 @Override public void run() { 627 popBackStackState(mHost.getHandler(), null, id, flags); 628 } 629 }, false); 630 } 631 632 @Override 633 public boolean popBackStackImmediate(int id, int flags) { 634 checkStateLoss(); 635 executePendingTransactions(); 636 if (id < 0) { 637 throw new IllegalArgumentException("Bad id: " + id); 638 } 639 return popBackStackState(mHost.getHandler(), null, id, flags); 640 } 641 642 @Override 643 public int getBackStackEntryCount() { 644 return mBackStack != null ? mBackStack.size() : 0; 645 } 646 647 @Override 648 public BackStackEntry getBackStackEntryAt(int index) { 649 return mBackStack.get(index); 650 } 651 652 @Override 653 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 654 if (mBackStackChangeListeners == null) { 655 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 656 } 657 mBackStackChangeListeners.add(listener); 658 } 659 660 @Override 661 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 662 if (mBackStackChangeListeners != null) { 663 mBackStackChangeListeners.remove(listener); 664 } 665 } 666 667 @Override 668 public void putFragment(Bundle bundle, String key, Fragment fragment) { 669 if (fragment.mIndex < 0) { 670 throwException(new IllegalStateException("Fragment " + fragment 671 + " is not currently in the FragmentManager")); 672 } 673 bundle.putInt(key, fragment.mIndex); 674 } 675 676 @Override 677 public Fragment getFragment(Bundle bundle, String key) { 678 int index = bundle.getInt(key, -1); 679 if (index == -1) { 680 return null; 681 } 682 if (index >= mActive.size()) { 683 throwException(new IllegalStateException("Fragment no longer exists for key " 684 + key + ": index " + index)); 685 } 686 Fragment f = mActive.get(index); 687 if (f == null) { 688 throwException(new IllegalStateException("Fragment no longer exists for key " 689 + key + ": index " + index)); 690 } 691 return f; 692 } 693 694 @Override 695 public List<Fragment> getFragments() { 696 return mActive; 697 } 698 699 @Override 700 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 701 if (fragment.mIndex < 0) { 702 throwException( new IllegalStateException("Fragment " + fragment 703 + " is not currently in the FragmentManager")); 704 } 705 if (fragment.mState > Fragment.INITIALIZING) { 706 Bundle result = saveFragmentBasicState(fragment); 707 return result != null ? new Fragment.SavedState(result) : null; 708 } 709 return null; 710 } 711 712 @Override 713 public boolean isDestroyed() { 714 return mDestroyed; 715 } 716 717 @Override 718 public String toString() { 719 StringBuilder sb = new StringBuilder(128); 720 sb.append("FragmentManager{"); 721 sb.append(Integer.toHexString(System.identityHashCode(this))); 722 sb.append(" in "); 723 if (mParent != null) { 724 DebugUtils.buildShortClassTag(mParent, sb); 725 } else { 726 DebugUtils.buildShortClassTag(mHost, sb); 727 } 728 sb.append("}}"); 729 return sb.toString(); 730 } 731 732 @Override 733 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 734 String innerPrefix = prefix + " "; 735 736 int N; 737 if (mActive != null) { 738 N = mActive.size(); 739 if (N > 0) { 740 writer.print(prefix); writer.print("Active Fragments in "); 741 writer.print(Integer.toHexString(System.identityHashCode(this))); 742 writer.println(":"); 743 for (int i=0; i<N; i++) { 744 Fragment f = mActive.get(i); 745 writer.print(prefix); writer.print(" #"); writer.print(i); 746 writer.print(": "); writer.println(f); 747 if (f != null) { 748 f.dump(innerPrefix, fd, writer, args); 749 } 750 } 751 } 752 } 753 754 if (mAdded != null) { 755 N = mAdded.size(); 756 if (N > 0) { 757 writer.print(prefix); writer.println("Added Fragments:"); 758 for (int i=0; i<N; i++) { 759 Fragment f = mAdded.get(i); 760 writer.print(prefix); writer.print(" #"); writer.print(i); 761 writer.print(": "); writer.println(f.toString()); 762 } 763 } 764 } 765 766 if (mCreatedMenus != null) { 767 N = mCreatedMenus.size(); 768 if (N > 0) { 769 writer.print(prefix); writer.println("Fragments Created Menus:"); 770 for (int i=0; i<N; i++) { 771 Fragment f = mCreatedMenus.get(i); 772 writer.print(prefix); writer.print(" #"); writer.print(i); 773 writer.print(": "); writer.println(f.toString()); 774 } 775 } 776 } 777 778 if (mBackStack != null) { 779 N = mBackStack.size(); 780 if (N > 0) { 781 writer.print(prefix); writer.println("Back Stack:"); 782 for (int i=0; i<N; i++) { 783 BackStackRecord bs = mBackStack.get(i); 784 writer.print(prefix); writer.print(" #"); writer.print(i); 785 writer.print(": "); writer.println(bs.toString()); 786 bs.dump(innerPrefix, fd, writer, args); 787 } 788 } 789 } 790 791 synchronized (this) { 792 if (mBackStackIndices != null) { 793 N = mBackStackIndices.size(); 794 if (N > 0) { 795 writer.print(prefix); writer.println("Back Stack Indices:"); 796 for (int i=0; i<N; i++) { 797 BackStackRecord bs = mBackStackIndices.get(i); 798 writer.print(prefix); writer.print(" #"); writer.print(i); 799 writer.print(": "); writer.println(bs); 800 } 801 } 802 } 803 804 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 805 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 806 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 807 } 808 } 809 810 if (mPendingActions != null) { 811 N = mPendingActions.size(); 812 if (N > 0) { 813 writer.print(prefix); writer.println("Pending Actions:"); 814 for (int i=0; i<N; i++) { 815 Runnable r = mPendingActions.get(i); 816 writer.print(prefix); writer.print(" #"); writer.print(i); 817 writer.print(": "); writer.println(r); 818 } 819 } 820 } 821 822 writer.print(prefix); writer.println("FragmentManager misc state:"); 823 writer.print(prefix); writer.print(" mHost="); writer.println(mHost); 824 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 825 if (mParent != null) { 826 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 827 } 828 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 829 writer.print(" mStateSaved="); writer.print(mStateSaved); 830 writer.print(" mDestroyed="); writer.println(mDestroyed); 831 if (mNeedMenuInvalidate) { 832 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 833 writer.println(mNeedMenuInvalidate); 834 } 835 if (mNoTransactionsBecause != null) { 836 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 837 writer.println(mNoTransactionsBecause); 838 } 839 if (mAvailIndices != null && mAvailIndices.size() > 0) { 840 writer.print(prefix); writer.print(" mAvailIndices: "); 841 writer.println(Arrays.toString(mAvailIndices.toArray())); 842 } 843 } 844 845 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 846 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 847 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 848 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 849 850 static final int ANIM_DUR = 220; 851 852 static Animation makeOpenCloseAnimation(Context context, float startScale, 853 float endScale, float startAlpha, float endAlpha) { 854 AnimationSet set = new AnimationSet(false); 855 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 856 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 857 scale.setInterpolator(DECELERATE_QUINT); 858 scale.setDuration(ANIM_DUR); 859 set.addAnimation(scale); 860 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 861 alpha.setInterpolator(DECELERATE_CUBIC); 862 alpha.setDuration(ANIM_DUR); 863 set.addAnimation(alpha); 864 return set; 865 } 866 867 static Animation makeFadeAnimation(Context context, float start, float end) { 868 AlphaAnimation anim = new AlphaAnimation(start, end); 869 anim.setInterpolator(DECELERATE_CUBIC); 870 anim.setDuration(ANIM_DUR); 871 return anim; 872 } 873 874 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 875 int transitionStyle) { 876 Animation animObj = fragment.onCreateAnimation(transit, enter, 877 fragment.mNextAnim); 878 if (animObj != null) { 879 return animObj; 880 } 881 882 if (fragment.mNextAnim != 0) { 883 Animation anim = AnimationUtils.loadAnimation(mHost.getContext(), fragment.mNextAnim); 884 if (anim != null) { 885 return anim; 886 } 887 } 888 889 if (transit == 0) { 890 return null; 891 } 892 893 int styleIndex = transitToStyleIndex(transit, enter); 894 if (styleIndex < 0) { 895 return null; 896 } 897 898 switch (styleIndex) { 899 case ANIM_STYLE_OPEN_ENTER: 900 return makeOpenCloseAnimation(mHost.getContext(), 1.125f, 1.0f, 0, 1); 901 case ANIM_STYLE_OPEN_EXIT: 902 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, .975f, 1, 0); 903 case ANIM_STYLE_CLOSE_ENTER: 904 return makeOpenCloseAnimation(mHost.getContext(), .975f, 1.0f, 0, 1); 905 case ANIM_STYLE_CLOSE_EXIT: 906 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, 1.075f, 1, 0); 907 case ANIM_STYLE_FADE_ENTER: 908 return makeFadeAnimation(mHost.getContext(), 0, 1); 909 case ANIM_STYLE_FADE_EXIT: 910 return makeFadeAnimation(mHost.getContext(), 1, 0); 911 } 912 913 if (transitionStyle == 0 && mHost.onHasWindowAnimations()) { 914 transitionStyle = mHost.onGetWindowAnimations(); 915 } 916 if (transitionStyle == 0) { 917 return null; 918 } 919 920 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 921 // com.android.internal.R.styleable.FragmentAnimation); 922 //int anim = attrs.getResourceId(styleIndex, 0); 923 //attrs.recycle(); 924 925 //if (anim == 0) { 926 // return null; 927 //} 928 929 //return AnimatorInflater.loadAnimator(mActivity, anim); 930 return null; 931 } 932 933 public void performPendingDeferredStart(Fragment f) { 934 if (f.mDeferStart) { 935 if (mExecutingActions) { 936 // Wait until we're done executing our pending transactions 937 mHavePendingDeferredStart = true; 938 return; 939 } 940 f.mDeferStart = false; 941 moveToState(f, mCurState, 0, 0, false); 942 } 943 } 944 945 /** 946 * Sets the to be animated view on hardware layer during the animation. Note 947 * that calling this will replace any existing animation listener on the animation 948 * with a new one, as animations do not support more than one listeners. Therefore, 949 * animations that already have listeners should do the layer change operations 950 * in their existing listeners, rather than calling this function. 951 */ 952 private void setHWLayerAnimListenerIfAlpha(final View v, Animation anim) { 953 if (v == null || anim == null) { 954 return; 955 } 956 if (shouldRunOnHWLayer(v, anim)) { 957 AnimationListener originalListener = null; 958 try { 959 if (sAnimationListenerField == null) { 960 sAnimationListenerField = Animation.class.getDeclaredField("mListener"); 961 sAnimationListenerField.setAccessible(true); 962 } 963 originalListener = (AnimationListener) sAnimationListenerField.get(anim); 964 } catch (NoSuchFieldException e) { 965 Log.e(TAG, "No field with the name mListener is found in Animation class", e); 966 } catch (IllegalAccessException e) { 967 Log.e(TAG, "Cannot access Animation's mListener field", e); 968 } 969 // If there's already a listener set on the animation, we need wrap the new listener 970 // around the existing listener, so that they will both get animation listener 971 // callbacks. 972 ViewCompat.setLayerType(v, ViewCompat.LAYER_TYPE_HARDWARE, null); 973 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener(v, anim, 974 originalListener)); 975 } 976 } 977 978 boolean isStateAtLeast(int state) { 979 return mCurState >= state; 980 } 981 982 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 983 boolean keepActive) { 984 // Fragments that are not currently added will sit in the onCreate() state. 985 if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) { 986 newState = Fragment.CREATED; 987 } 988 if (f.mRemoving && newState > f.mState) { 989 // While removing a fragment, we can't change it to a higher state. 990 newState = f.mState; 991 } 992 // Defer start if requested; don't allow it to move to STARTED or higher 993 // if it's not already started. 994 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 995 newState = Fragment.STOPPED; 996 } 997 if (f.mState < newState) { 998 // For fragments that are created from a layout, when restoring from 999 // state we don't want to allow them to be created until they are 1000 // being reloaded from the layout. 1001 if (f.mFromLayout && !f.mInLayout) { 1002 return; 1003 } 1004 if (f.mAnimatingAway != null) { 1005 // The fragment is currently being animated... but! Now we 1006 // want to move our state back up. Give up on waiting for the 1007 // animation, move to whatever the final state should be once 1008 // the animation is done, and then we can proceed from there. 1009 f.mAnimatingAway = null; 1010 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 1011 } 1012 switch (f.mState) { 1013 case Fragment.INITIALIZING: 1014 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 1015 if (f.mSavedFragmentState != null) { 1016 f.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 1017 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 1018 FragmentManagerImpl.VIEW_STATE_TAG); 1019 f.mTarget = getFragment(f.mSavedFragmentState, 1020 FragmentManagerImpl.TARGET_STATE_TAG); 1021 if (f.mTarget != null) { 1022 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 1023 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 1024 } 1025 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 1026 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 1027 if (!f.mUserVisibleHint) { 1028 f.mDeferStart = true; 1029 if (newState > Fragment.STOPPED) { 1030 newState = Fragment.STOPPED; 1031 } 1032 } 1033 } 1034 f.mHost = mHost; 1035 f.mParentFragment = mParent; 1036 f.mFragmentManager = mParent != null 1037 ? mParent.mChildFragmentManager : mHost.getFragmentManagerImpl(); 1038 f.mCalled = false; 1039 f.onAttach(mHost.getContext()); 1040 if (!f.mCalled) { 1041 throw new SuperNotCalledException("Fragment " + f 1042 + " did not call through to super.onAttach()"); 1043 } 1044 if (f.mParentFragment == null) { 1045 mHost.onAttachFragment(f); 1046 } 1047 1048 if (!f.mRetaining) { 1049 f.performCreate(f.mSavedFragmentState); 1050 } else { 1051 f.restoreChildFragmentState(f.mSavedFragmentState); 1052 f.mState = Fragment.CREATED; 1053 } 1054 f.mRetaining = false; 1055 if (f.mFromLayout) { 1056 // For fragments that are part of the content view 1057 // layout, we need to instantiate the view immediately 1058 // and the inflater will take care of adding it. 1059 f.mView = f.performCreateView(f.getLayoutInflater( 1060 f.mSavedFragmentState), null, f.mSavedFragmentState); 1061 if (f.mView != null) { 1062 f.mInnerView = f.mView; 1063 if (Build.VERSION.SDK_INT >= 11) { 1064 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1065 } else { 1066 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1067 } 1068 if (f.mHidden) f.mView.setVisibility(View.GONE); 1069 f.onViewCreated(f.mView, f.mSavedFragmentState); 1070 } else { 1071 f.mInnerView = null; 1072 } 1073 } 1074 case Fragment.CREATED: 1075 if (newState > Fragment.CREATED) { 1076 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 1077 if (!f.mFromLayout) { 1078 ViewGroup container = null; 1079 if (f.mContainerId != 0) { 1080 if (f.mContainerId == View.NO_ID) { 1081 throwException(new IllegalArgumentException( 1082 "Cannot create fragment " 1083 + f 1084 + " for a container view with no id")); 1085 } 1086 container = (ViewGroup) mContainer.onFindViewById(f.mContainerId); 1087 if (container == null && !f.mRestored) { 1088 String resName; 1089 try { 1090 resName = f.getResources().getResourceName(f.mContainerId); 1091 } catch (NotFoundException e) { 1092 resName = "unknown"; 1093 } 1094 throwException(new IllegalArgumentException( 1095 "No view found for id 0x" 1096 + Integer.toHexString(f.mContainerId) + " (" 1097 + resName 1098 + ") for fragment " + f)); 1099 } 1100 } 1101 f.mContainer = container; 1102 f.mView = f.performCreateView(f.getLayoutInflater( 1103 f.mSavedFragmentState), container, f.mSavedFragmentState); 1104 if (f.mView != null) { 1105 f.mInnerView = f.mView; 1106 if (Build.VERSION.SDK_INT >= 11) { 1107 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1108 } else { 1109 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1110 } 1111 if (container != null) { 1112 Animation anim = loadAnimation(f, transit, true, 1113 transitionStyle); 1114 if (anim != null) { 1115 setHWLayerAnimListenerIfAlpha(f.mView, anim); 1116 f.mView.startAnimation(anim); 1117 } 1118 container.addView(f.mView); 1119 } 1120 if (f.mHidden) f.mView.setVisibility(View.GONE); 1121 f.onViewCreated(f.mView, f.mSavedFragmentState); 1122 } else { 1123 f.mInnerView = null; 1124 } 1125 } 1126 1127 f.performActivityCreated(f.mSavedFragmentState); 1128 if (f.mView != null) { 1129 f.restoreViewState(f.mSavedFragmentState); 1130 } 1131 f.mSavedFragmentState = null; 1132 } 1133 case Fragment.ACTIVITY_CREATED: 1134 if (newState > Fragment.ACTIVITY_CREATED) { 1135 f.mState = Fragment.STOPPED; 1136 } 1137 case Fragment.STOPPED: 1138 if (newState > Fragment.STOPPED) { 1139 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 1140 f.performStart(); 1141 } 1142 case Fragment.STARTED: 1143 if (newState > Fragment.STARTED) { 1144 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 1145 f.performResume(); 1146 f.mSavedFragmentState = null; 1147 f.mSavedViewState = null; 1148 } 1149 } 1150 } else if (f.mState > newState) { 1151 switch (f.mState) { 1152 case Fragment.RESUMED: 1153 if (newState < Fragment.RESUMED) { 1154 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 1155 f.performPause(); 1156 } 1157 case Fragment.STARTED: 1158 if (newState < Fragment.STARTED) { 1159 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 1160 f.performStop(); 1161 } 1162 case Fragment.STOPPED: 1163 if (newState < Fragment.STOPPED) { 1164 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 1165 f.performReallyStop(); 1166 } 1167 case Fragment.ACTIVITY_CREATED: 1168 if (newState < Fragment.ACTIVITY_CREATED) { 1169 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 1170 if (f.mView != null) { 1171 // Need to save the current view state if not 1172 // done already. 1173 if (mHost.onShouldSaveFragmentState(f) && f.mSavedViewState == null) { 1174 saveFragmentViewState(f); 1175 } 1176 } 1177 f.performDestroyView(); 1178 if (f.mView != null && f.mContainer != null) { 1179 Animation anim = null; 1180 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 1181 anim = loadAnimation(f, transit, false, 1182 transitionStyle); 1183 } 1184 if (anim != null) { 1185 final Fragment fragment = f; 1186 f.mAnimatingAway = f.mView; 1187 f.mStateAfterAnimating = newState; 1188 final View viewToAnimate = f.mView; 1189 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener( 1190 viewToAnimate, anim) { 1191 @Override 1192 public void onAnimationEnd(Animation animation) { 1193 super.onAnimationEnd(animation); 1194 if (fragment.mAnimatingAway != null) { 1195 fragment.mAnimatingAway = null; 1196 moveToState(fragment, fragment.mStateAfterAnimating, 1197 0, 0, false); 1198 } 1199 } 1200 }); 1201 f.mView.startAnimation(anim); 1202 } 1203 f.mContainer.removeView(f.mView); 1204 } 1205 f.mContainer = null; 1206 f.mView = null; 1207 f.mInnerView = null; 1208 } 1209 case Fragment.CREATED: 1210 if (newState < Fragment.CREATED) { 1211 if (mDestroyed) { 1212 if (f.mAnimatingAway != null) { 1213 // The fragment's containing activity is 1214 // being destroyed, but this fragment is 1215 // currently animating away. Stop the 1216 // animation right now -- it is not needed, 1217 // and we can't wait any more on destroying 1218 // the fragment. 1219 View v = f.mAnimatingAway; 1220 f.mAnimatingAway = null; 1221 v.clearAnimation(); 1222 } 1223 } 1224 if (f.mAnimatingAway != null) { 1225 // We are waiting for the fragment's view to finish 1226 // animating away. Just make a note of the state 1227 // the fragment now should move to once the animation 1228 // is done. 1229 f.mStateAfterAnimating = newState; 1230 newState = Fragment.CREATED; 1231 } else { 1232 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1233 if (!f.mRetaining) { 1234 f.performDestroy(); 1235 } else { 1236 f.mState = Fragment.INITIALIZING; 1237 } 1238 1239 f.performDetach(); 1240 if (!keepActive) { 1241 if (!f.mRetaining) { 1242 makeInactive(f); 1243 } else { 1244 f.mHost = null; 1245 f.mParentFragment = null; 1246 f.mFragmentManager = null; 1247 } 1248 } 1249 } 1250 } 1251 } 1252 } 1253 1254 if (f.mState != newState) { 1255 Log.w(TAG, "moveToState: Fragment state for " + f + " not updated inline; " 1256 + "expected state " + newState + " found " + f.mState); 1257 f.mState = newState; 1258 } 1259 } 1260 1261 void moveToState(Fragment f) { 1262 moveToState(f, mCurState, 0, 0, false); 1263 } 1264 1265 void moveToState(int newState, boolean always) { 1266 moveToState(newState, 0, 0, always); 1267 } 1268 1269 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1270 if (mHost == null && newState != Fragment.INITIALIZING) { 1271 throw new IllegalStateException("No host"); 1272 } 1273 1274 if (!always && mCurState == newState) { 1275 return; 1276 } 1277 1278 mCurState = newState; 1279 if (mActive != null) { 1280 boolean loadersRunning = false; 1281 for (int i=0; i<mActive.size(); i++) { 1282 Fragment f = mActive.get(i); 1283 if (f != null) { 1284 moveToState(f, newState, transit, transitStyle, false); 1285 if (f.mLoaderManager != null) { 1286 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1287 } 1288 } 1289 } 1290 1291 if (!loadersRunning) { 1292 startPendingDeferredFragments(); 1293 } 1294 1295 if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) { 1296 mHost.onSupportInvalidateOptionsMenu(); 1297 mNeedMenuInvalidate = false; 1298 } 1299 } 1300 } 1301 1302 void startPendingDeferredFragments() { 1303 if (mActive == null) return; 1304 1305 for (int i=0; i<mActive.size(); i++) { 1306 Fragment f = mActive.get(i); 1307 if (f != null) { 1308 performPendingDeferredStart(f); 1309 } 1310 } 1311 } 1312 1313 void makeActive(Fragment f) { 1314 if (f.mIndex >= 0) { 1315 return; 1316 } 1317 1318 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1319 if (mActive == null) { 1320 mActive = new ArrayList<Fragment>(); 1321 } 1322 f.setIndex(mActive.size(), mParent); 1323 mActive.add(f); 1324 1325 } else { 1326 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent); 1327 mActive.set(f.mIndex, f); 1328 } 1329 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1330 } 1331 1332 void makeInactive(Fragment f) { 1333 if (f.mIndex < 0) { 1334 return; 1335 } 1336 1337 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1338 mActive.set(f.mIndex, null); 1339 if (mAvailIndices == null) { 1340 mAvailIndices = new ArrayList<Integer>(); 1341 } 1342 mAvailIndices.add(f.mIndex); 1343 mHost.inactivateFragment(f.mWho); 1344 f.initState(); 1345 } 1346 1347 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1348 if (mAdded == null) { 1349 mAdded = new ArrayList<Fragment>(); 1350 } 1351 if (DEBUG) Log.v(TAG, "add: " + fragment); 1352 makeActive(fragment); 1353 if (!fragment.mDetached) { 1354 if (mAdded.contains(fragment)) { 1355 throw new IllegalStateException("Fragment already added: " + fragment); 1356 } 1357 mAdded.add(fragment); 1358 fragment.mAdded = true; 1359 fragment.mRemoving = false; 1360 if (fragment.mHasMenu && fragment.mMenuVisible) { 1361 mNeedMenuInvalidate = true; 1362 } 1363 if (moveToStateNow) { 1364 moveToState(fragment); 1365 } 1366 } 1367 } 1368 1369 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1370 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1371 final boolean inactive = !fragment.isInBackStack(); 1372 if (!fragment.mDetached || inactive) { 1373 if (mAdded != null) { 1374 mAdded.remove(fragment); 1375 } 1376 if (fragment.mHasMenu && fragment.mMenuVisible) { 1377 mNeedMenuInvalidate = true; 1378 } 1379 fragment.mAdded = false; 1380 fragment.mRemoving = true; 1381 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1382 transition, transitionStyle, false); 1383 } 1384 } 1385 1386 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1387 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1388 if (!fragment.mHidden) { 1389 fragment.mHidden = true; 1390 if (fragment.mView != null) { 1391 Animation anim = loadAnimation(fragment, transition, false, 1392 transitionStyle); 1393 if (anim != null) { 1394 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1395 fragment.mView.startAnimation(anim); 1396 } 1397 fragment.mView.setVisibility(View.GONE); 1398 } 1399 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1400 mNeedMenuInvalidate = true; 1401 } 1402 fragment.onHiddenChanged(true); 1403 } 1404 } 1405 1406 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1407 if (DEBUG) Log.v(TAG, "show: " + fragment); 1408 if (fragment.mHidden) { 1409 fragment.mHidden = false; 1410 if (fragment.mView != null) { 1411 Animation anim = loadAnimation(fragment, transition, true, 1412 transitionStyle); 1413 if (anim != null) { 1414 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1415 fragment.mView.startAnimation(anim); 1416 } 1417 fragment.mView.setVisibility(View.VISIBLE); 1418 } 1419 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1420 mNeedMenuInvalidate = true; 1421 } 1422 fragment.onHiddenChanged(false); 1423 } 1424 } 1425 1426 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1427 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1428 if (!fragment.mDetached) { 1429 fragment.mDetached = true; 1430 if (fragment.mAdded) { 1431 // We are not already in back stack, so need to remove the fragment. 1432 if (mAdded != null) { 1433 if (DEBUG) Log.v(TAG, "remove from detach: " + fragment); 1434 mAdded.remove(fragment); 1435 } 1436 if (fragment.mHasMenu && fragment.mMenuVisible) { 1437 mNeedMenuInvalidate = true; 1438 } 1439 fragment.mAdded = false; 1440 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1441 } 1442 } 1443 } 1444 1445 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1446 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1447 if (fragment.mDetached) { 1448 fragment.mDetached = false; 1449 if (!fragment.mAdded) { 1450 if (mAdded == null) { 1451 mAdded = new ArrayList<Fragment>(); 1452 } 1453 if (mAdded.contains(fragment)) { 1454 throw new IllegalStateException("Fragment already added: " + fragment); 1455 } 1456 if (DEBUG) Log.v(TAG, "add from attach: " + fragment); 1457 mAdded.add(fragment); 1458 fragment.mAdded = true; 1459 if (fragment.mHasMenu && fragment.mMenuVisible) { 1460 mNeedMenuInvalidate = true; 1461 } 1462 moveToState(fragment, mCurState, transition, transitionStyle, false); 1463 } 1464 } 1465 } 1466 1467 public Fragment findFragmentById(int id) { 1468 if (mAdded != null) { 1469 // First look through added fragments. 1470 for (int i=mAdded.size()-1; i>=0; i--) { 1471 Fragment f = mAdded.get(i); 1472 if (f != null && f.mFragmentId == id) { 1473 return f; 1474 } 1475 } 1476 } 1477 if (mActive != null) { 1478 // Now for any known fragment. 1479 for (int i=mActive.size()-1; i>=0; i--) { 1480 Fragment f = mActive.get(i); 1481 if (f != null && f.mFragmentId == id) { 1482 return f; 1483 } 1484 } 1485 } 1486 return null; 1487 } 1488 1489 public Fragment findFragmentByTag(String tag) { 1490 if (mAdded != null && tag != null) { 1491 // First look through added fragments. 1492 for (int i=mAdded.size()-1; i>=0; i--) { 1493 Fragment f = mAdded.get(i); 1494 if (f != null && tag.equals(f.mTag)) { 1495 return f; 1496 } 1497 } 1498 } 1499 if (mActive != null && tag != null) { 1500 // Now for any known fragment. 1501 for (int i=mActive.size()-1; i>=0; i--) { 1502 Fragment f = mActive.get(i); 1503 if (f != null && tag.equals(f.mTag)) { 1504 return f; 1505 } 1506 } 1507 } 1508 return null; 1509 } 1510 1511 public Fragment findFragmentByWho(String who) { 1512 if (mActive != null && who != null) { 1513 for (int i=mActive.size()-1; i>=0; i--) { 1514 Fragment f = mActive.get(i); 1515 if (f != null && (f=f.findFragmentByWho(who)) != null) { 1516 return f; 1517 } 1518 } 1519 } 1520 return null; 1521 } 1522 1523 private void checkStateLoss() { 1524 if (mStateSaved) { 1525 throw new IllegalStateException( 1526 "Can not perform this action after onSaveInstanceState"); 1527 } 1528 if (mNoTransactionsBecause != null) { 1529 throw new IllegalStateException( 1530 "Can not perform this action inside of " + mNoTransactionsBecause); 1531 } 1532 } 1533 1534 /** 1535 * Adds an action to the queue of pending actions. 1536 * 1537 * @param action the action to add 1538 * @param allowStateLoss whether to allow loss of state information 1539 * @throws IllegalStateException if the activity has been destroyed 1540 */ 1541 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1542 if (!allowStateLoss) { 1543 checkStateLoss(); 1544 } 1545 synchronized (this) { 1546 if (mDestroyed || mHost == null) { 1547 throw new IllegalStateException("Activity has been destroyed"); 1548 } 1549 if (mPendingActions == null) { 1550 mPendingActions = new ArrayList<Runnable>(); 1551 } 1552 mPendingActions.add(action); 1553 if (mPendingActions.size() == 1) { 1554 mHost.getHandler().removeCallbacks(mExecCommit); 1555 mHost.getHandler().post(mExecCommit); 1556 } 1557 } 1558 } 1559 1560 public int allocBackStackIndex(BackStackRecord bse) { 1561 synchronized (this) { 1562 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1563 if (mBackStackIndices == null) { 1564 mBackStackIndices = new ArrayList<BackStackRecord>(); 1565 } 1566 int index = mBackStackIndices.size(); 1567 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1568 mBackStackIndices.add(bse); 1569 return index; 1570 1571 } else { 1572 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1573 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1574 mBackStackIndices.set(index, bse); 1575 return index; 1576 } 1577 } 1578 } 1579 1580 public void setBackStackIndex(int index, BackStackRecord bse) { 1581 synchronized (this) { 1582 if (mBackStackIndices == null) { 1583 mBackStackIndices = new ArrayList<BackStackRecord>(); 1584 } 1585 int N = mBackStackIndices.size(); 1586 if (index < N) { 1587 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1588 mBackStackIndices.set(index, bse); 1589 } else { 1590 while (N < index) { 1591 mBackStackIndices.add(null); 1592 if (mAvailBackStackIndices == null) { 1593 mAvailBackStackIndices = new ArrayList<Integer>(); 1594 } 1595 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1596 mAvailBackStackIndices.add(N); 1597 N++; 1598 } 1599 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1600 mBackStackIndices.add(bse); 1601 } 1602 } 1603 } 1604 1605 public void freeBackStackIndex(int index) { 1606 synchronized (this) { 1607 mBackStackIndices.set(index, null); 1608 if (mAvailBackStackIndices == null) { 1609 mAvailBackStackIndices = new ArrayList<Integer>(); 1610 } 1611 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1612 mAvailBackStackIndices.add(index); 1613 } 1614 } 1615 1616 public void execSingleAction(Runnable action, boolean allowStateLoss) { 1617 if (mExecutingActions) { 1618 throw new IllegalStateException("FragmentManager is already executing transactions"); 1619 } 1620 1621 if (Looper.myLooper() != mHost.getHandler().getLooper()) { 1622 throw new IllegalStateException("Must be called from main thread of fragment host"); 1623 } 1624 1625 if (!allowStateLoss) { 1626 checkStateLoss(); 1627 } 1628 1629 mExecutingActions = true; 1630 action.run(); 1631 mExecutingActions = false; 1632 1633 doPendingDeferredStart(); 1634 } 1635 1636 /** 1637 * Only call from main thread! 1638 */ 1639 public boolean execPendingActions() { 1640 if (mExecutingActions) { 1641 throw new IllegalStateException("FragmentManager is already executing transactions"); 1642 } 1643 1644 if (Looper.myLooper() != mHost.getHandler().getLooper()) { 1645 throw new IllegalStateException("Must be called from main thread of fragment host"); 1646 } 1647 1648 boolean didSomething = false; 1649 1650 while (true) { 1651 int numActions; 1652 1653 synchronized (this) { 1654 if (mPendingActions == null || mPendingActions.size() == 0) { 1655 break; 1656 } 1657 1658 numActions = mPendingActions.size(); 1659 if (mTmpActions == null || mTmpActions.length < numActions) { 1660 mTmpActions = new Runnable[numActions]; 1661 } 1662 mPendingActions.toArray(mTmpActions); 1663 mPendingActions.clear(); 1664 mHost.getHandler().removeCallbacks(mExecCommit); 1665 } 1666 1667 mExecutingActions = true; 1668 for (int i=0; i<numActions; i++) { 1669 mTmpActions[i].run(); 1670 mTmpActions[i] = null; 1671 } 1672 mExecutingActions = false; 1673 didSomething = true; 1674 } 1675 1676 doPendingDeferredStart(); 1677 1678 return didSomething; 1679 } 1680 1681 void doPendingDeferredStart() { 1682 if (mHavePendingDeferredStart) { 1683 boolean loadersRunning = false; 1684 for (int i = 0; i < mActive.size(); i++) { 1685 Fragment f = mActive.get(i); 1686 if (f != null && f.mLoaderManager != null) { 1687 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1688 } 1689 } 1690 if (!loadersRunning) { 1691 mHavePendingDeferredStart = false; 1692 startPendingDeferredFragments(); 1693 } 1694 } 1695 } 1696 1697 void reportBackStackChanged() { 1698 if (mBackStackChangeListeners != null) { 1699 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1700 mBackStackChangeListeners.get(i).onBackStackChanged(); 1701 } 1702 } 1703 } 1704 1705 void addBackStackState(BackStackRecord state) { 1706 if (mBackStack == null) { 1707 mBackStack = new ArrayList<BackStackRecord>(); 1708 } 1709 mBackStack.add(state); 1710 reportBackStackChanged(); 1711 } 1712 1713 @SuppressWarnings("unused") 1714 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1715 if (mBackStack == null) { 1716 return false; 1717 } 1718 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1719 int last = mBackStack.size()-1; 1720 if (last < 0) { 1721 return false; 1722 } 1723 final BackStackRecord bss = mBackStack.remove(last); 1724 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1725 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1726 if (mCurState >= Fragment.CREATED) { 1727 bss.calculateBackFragments(firstOutFragments, lastInFragments); 1728 } 1729 bss.popFromBackStack(true, null, firstOutFragments, lastInFragments); 1730 reportBackStackChanged(); 1731 } else { 1732 int index = -1; 1733 if (name != null || id >= 0) { 1734 // If a name or ID is specified, look for that place in 1735 // the stack. 1736 index = mBackStack.size()-1; 1737 while (index >= 0) { 1738 BackStackRecord bss = mBackStack.get(index); 1739 if (name != null && name.equals(bss.getName())) { 1740 break; 1741 } 1742 if (id >= 0 && id == bss.mIndex) { 1743 break; 1744 } 1745 index--; 1746 } 1747 if (index < 0) { 1748 return false; 1749 } 1750 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1751 index--; 1752 // Consume all following entries that match. 1753 while (index >= 0) { 1754 BackStackRecord bss = mBackStack.get(index); 1755 if ((name != null && name.equals(bss.getName())) 1756 || (id >= 0 && id == bss.mIndex)) { 1757 index--; 1758 continue; 1759 } 1760 break; 1761 } 1762 } 1763 } 1764 if (index == mBackStack.size()-1) { 1765 return false; 1766 } 1767 final ArrayList<BackStackRecord> states 1768 = new ArrayList<BackStackRecord>(); 1769 for (int i=mBackStack.size()-1; i>index; i--) { 1770 states.add(mBackStack.remove(i)); 1771 } 1772 final int LAST = states.size()-1; 1773 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1774 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1775 if (mCurState >= Fragment.CREATED) { 1776 for (int i = 0; i <= LAST; i++) { 1777 states.get(i).calculateBackFragments(firstOutFragments, lastInFragments); 1778 } 1779 } 1780 BackStackRecord.TransitionState state = null; 1781 for (int i=0; i<=LAST; i++) { 1782 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1783 state = states.get(i).popFromBackStack(i == LAST, state, 1784 firstOutFragments, lastInFragments); 1785 } 1786 reportBackStackChanged(); 1787 } 1788 return true; 1789 } 1790 1791 FragmentManagerNonConfig retainNonConfig() { 1792 ArrayList<Fragment> fragments = null; 1793 ArrayList<FragmentManagerNonConfig> childFragments = null; 1794 if (mActive != null) { 1795 for (int i=0; i<mActive.size(); i++) { 1796 Fragment f = mActive.get(i); 1797 if (f != null) { 1798 if (f.mRetainInstance) { 1799 if (fragments == null) { 1800 fragments = new ArrayList<Fragment>(); 1801 } 1802 fragments.add(f); 1803 f.mRetaining = true; 1804 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1805 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1806 } 1807 boolean addedChild = false; 1808 if (f.mChildFragmentManager != null) { 1809 FragmentManagerNonConfig child = f.mChildFragmentManager.retainNonConfig(); 1810 if (child != null) { 1811 if (childFragments == null) { 1812 childFragments = new ArrayList<FragmentManagerNonConfig>(); 1813 for (int j = 0; j < i; j++) { 1814 childFragments.add(null); 1815 } 1816 } 1817 childFragments.add(child); 1818 addedChild = true; 1819 } 1820 } 1821 if (childFragments != null && !addedChild) { 1822 childFragments.add(null); 1823 } 1824 } 1825 } 1826 } 1827 if (fragments == null && childFragments == null) { 1828 return null; 1829 } 1830 return new FragmentManagerNonConfig(fragments, childFragments); 1831 } 1832 1833 void saveFragmentViewState(Fragment f) { 1834 if (f.mInnerView == null) { 1835 return; 1836 } 1837 if (mStateArray == null) { 1838 mStateArray = new SparseArray<Parcelable>(); 1839 } else { 1840 mStateArray.clear(); 1841 } 1842 f.mInnerView.saveHierarchyState(mStateArray); 1843 if (mStateArray.size() > 0) { 1844 f.mSavedViewState = mStateArray; 1845 mStateArray = null; 1846 } 1847 } 1848 1849 Bundle saveFragmentBasicState(Fragment f) { 1850 Bundle result = null; 1851 1852 if (mStateBundle == null) { 1853 mStateBundle = new Bundle(); 1854 } 1855 f.performSaveInstanceState(mStateBundle); 1856 if (!mStateBundle.isEmpty()) { 1857 result = mStateBundle; 1858 mStateBundle = null; 1859 } 1860 1861 if (f.mView != null) { 1862 saveFragmentViewState(f); 1863 } 1864 if (f.mSavedViewState != null) { 1865 if (result == null) { 1866 result = new Bundle(); 1867 } 1868 result.putSparseParcelableArray( 1869 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1870 } 1871 if (!f.mUserVisibleHint) { 1872 if (result == null) { 1873 result = new Bundle(); 1874 } 1875 // Only add this if it's not the default value 1876 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1877 } 1878 1879 return result; 1880 } 1881 1882 Parcelable saveAllState() { 1883 // Make sure all pending operations have now been executed to get 1884 // our state update-to-date. 1885 execPendingActions(); 1886 1887 if (HONEYCOMB) { 1888 // As of Honeycomb, we save state after pausing. Prior to that 1889 // it is before pausing. With fragments this is an issue, since 1890 // there are many things you may do after pausing but before 1891 // stopping that change the fragment state. For those older 1892 // devices, we will not at this point say that we have saved 1893 // the state, so we will allow them to continue doing fragment 1894 // transactions. This retains the same semantics as Honeycomb, 1895 // though you do have the risk of losing the very most recent state 1896 // if the process is killed... we'll live with that. 1897 mStateSaved = true; 1898 } 1899 1900 if (mActive == null || mActive.size() <= 0) { 1901 return null; 1902 } 1903 1904 // First collect all active fragments. 1905 int N = mActive.size(); 1906 FragmentState[] active = new FragmentState[N]; 1907 boolean haveFragments = false; 1908 for (int i=0; i<N; i++) { 1909 Fragment f = mActive.get(i); 1910 if (f != null) { 1911 if (f.mIndex < 0) { 1912 throwException(new IllegalStateException( 1913 "Failure saving state: active " + f 1914 + " has cleared index: " + f.mIndex)); 1915 } 1916 1917 haveFragments = true; 1918 1919 FragmentState fs = new FragmentState(f); 1920 active[i] = fs; 1921 1922 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1923 fs.mSavedFragmentState = saveFragmentBasicState(f); 1924 1925 if (f.mTarget != null) { 1926 if (f.mTarget.mIndex < 0) { 1927 throwException(new IllegalStateException( 1928 "Failure saving state: " + f 1929 + " has target not in fragment manager: " + f.mTarget)); 1930 } 1931 if (fs.mSavedFragmentState == null) { 1932 fs.mSavedFragmentState = new Bundle(); 1933 } 1934 putFragment(fs.mSavedFragmentState, 1935 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1936 if (f.mTargetRequestCode != 0) { 1937 fs.mSavedFragmentState.putInt( 1938 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1939 f.mTargetRequestCode); 1940 } 1941 } 1942 1943 } else { 1944 fs.mSavedFragmentState = f.mSavedFragmentState; 1945 } 1946 1947 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1948 + fs.mSavedFragmentState); 1949 } 1950 } 1951 1952 if (!haveFragments) { 1953 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1954 return null; 1955 } 1956 1957 int[] added = null; 1958 BackStackState[] backStack = null; 1959 1960 // Build list of currently added fragments. 1961 if (mAdded != null) { 1962 N = mAdded.size(); 1963 if (N > 0) { 1964 added = new int[N]; 1965 for (int i=0; i<N; i++) { 1966 added[i] = mAdded.get(i).mIndex; 1967 if (added[i] < 0) { 1968 throwException(new IllegalStateException( 1969 "Failure saving state: active " + mAdded.get(i) 1970 + " has cleared index: " + added[i])); 1971 } 1972 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1973 + ": " + mAdded.get(i)); 1974 } 1975 } 1976 } 1977 1978 // Now save back stack. 1979 if (mBackStack != null) { 1980 N = mBackStack.size(); 1981 if (N > 0) { 1982 backStack = new BackStackState[N]; 1983 for (int i=0; i<N; i++) { 1984 backStack[i] = new BackStackState(mBackStack.get(i)); 1985 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1986 + ": " + mBackStack.get(i)); 1987 } 1988 } 1989 } 1990 1991 FragmentManagerState fms = new FragmentManagerState(); 1992 fms.mActive = active; 1993 fms.mAdded = added; 1994 fms.mBackStack = backStack; 1995 return fms; 1996 } 1997 1998 void restoreAllState(Parcelable state, FragmentManagerNonConfig nonConfig) { 1999 // If there is no saved state at all, then there can not be 2000 // any nonConfig fragments either, so that is that. 2001 if (state == null) return; 2002 FragmentManagerState fms = (FragmentManagerState)state; 2003 if (fms.mActive == null) return; 2004 2005 List<FragmentManagerNonConfig> childNonConfigs = null; 2006 2007 // First re-attach any non-config instances we are retaining back 2008 // to their saved state, so we don't try to instantiate them again. 2009 if (nonConfig != null) { 2010 List<Fragment> nonConfigFragments = nonConfig.getFragments(); 2011 childNonConfigs = nonConfig.getChildNonConfigs(); 2012 final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; 2013 for (int i = 0; i < count; i++) { 2014 Fragment f = nonConfigFragments.get(i); 2015 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 2016 FragmentState fs = fms.mActive[f.mIndex]; 2017 fs.mInstance = f; 2018 f.mSavedViewState = null; 2019 f.mBackStackNesting = 0; 2020 f.mInLayout = false; 2021 f.mAdded = false; 2022 f.mTarget = null; 2023 if (fs.mSavedFragmentState != null) { 2024 fs.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 2025 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 2026 FragmentManagerImpl.VIEW_STATE_TAG); 2027 f.mSavedFragmentState = fs.mSavedFragmentState; 2028 } 2029 } 2030 } 2031 2032 // Build the full list of active fragments, instantiating them from 2033 // their saved state. 2034 mActive = new ArrayList<>(fms.mActive.length); 2035 if (mAvailIndices != null) { 2036 mAvailIndices.clear(); 2037 } 2038 for (int i=0; i<fms.mActive.length; i++) { 2039 FragmentState fs = fms.mActive[i]; 2040 if (fs != null) { 2041 FragmentManagerNonConfig childNonConfig = null; 2042 if (childNonConfigs != null && i < childNonConfigs.size()) { 2043 childNonConfig = childNonConfigs.get(i); 2044 } 2045 Fragment f = fs.instantiate(mHost, mParent, childNonConfig); 2046 if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); 2047 mActive.add(f); 2048 // Now that the fragment is instantiated (or came from being 2049 // retained above), clear mInstance in case we end up re-restoring 2050 // from this FragmentState again. 2051 fs.mInstance = null; 2052 } else { 2053 mActive.add(null); 2054 if (mAvailIndices == null) { 2055 mAvailIndices = new ArrayList<Integer>(); 2056 } 2057 if (DEBUG) Log.v(TAG, "restoreAllState: avail #" + i); 2058 mAvailIndices.add(i); 2059 } 2060 } 2061 2062 // Update the target of all retained fragments. 2063 if (nonConfig != null) { 2064 List<Fragment> nonConfigFragments = nonConfig.getFragments(); 2065 final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; 2066 for (int i = 0; i < count; i++) { 2067 Fragment f = nonConfigFragments.get(i); 2068 if (f.mTargetIndex >= 0) { 2069 if (f.mTargetIndex < mActive.size()) { 2070 f.mTarget = mActive.get(f.mTargetIndex); 2071 } else { 2072 Log.w(TAG, "Re-attaching retained fragment " + f 2073 + " target no longer exists: " + f.mTargetIndex); 2074 f.mTarget = null; 2075 } 2076 } 2077 } 2078 } 2079 2080 // Build the list of currently added fragments. 2081 if (fms.mAdded != null) { 2082 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 2083 for (int i=0; i<fms.mAdded.length; i++) { 2084 Fragment f = mActive.get(fms.mAdded[i]); 2085 if (f == null) { 2086 throwException(new IllegalStateException( 2087 "No instantiated fragment for index #" + fms.mAdded[i])); 2088 } 2089 f.mAdded = true; 2090 if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); 2091 if (mAdded.contains(f)) { 2092 throw new IllegalStateException("Already added!"); 2093 } 2094 mAdded.add(f); 2095 } 2096 } else { 2097 mAdded = null; 2098 } 2099 2100 // Build the back stack. 2101 if (fms.mBackStack != null) { 2102 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 2103 for (int i=0; i<fms.mBackStack.length; i++) { 2104 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 2105 if (DEBUG) { 2106 Log.v(TAG, "restoreAllState: back stack #" + i 2107 + " (index " + bse.mIndex + "): " + bse); 2108 LogWriter logw = new LogWriter(TAG); 2109 PrintWriter pw = new PrintWriter(logw); 2110 bse.dump(" ", pw, false); 2111 } 2112 mBackStack.add(bse); 2113 if (bse.mIndex >= 0) { 2114 setBackStackIndex(bse.mIndex, bse); 2115 } 2116 } 2117 } else { 2118 mBackStack = null; 2119 } 2120 } 2121 2122 public void attachController(FragmentHostCallback host, 2123 FragmentContainer container, Fragment parent) { 2124 if (mHost != null) throw new IllegalStateException("Already attached"); 2125 mHost = host; 2126 mContainer = container; 2127 mParent = parent; 2128 } 2129 2130 public void noteStateNotSaved() { 2131 mStateSaved = false; 2132 } 2133 2134 public void dispatchCreate() { 2135 mStateSaved = false; 2136 moveToState(Fragment.CREATED, false); 2137 } 2138 2139 public void dispatchActivityCreated() { 2140 mStateSaved = false; 2141 moveToState(Fragment.ACTIVITY_CREATED, false); 2142 } 2143 2144 public void dispatchStart() { 2145 mStateSaved = false; 2146 moveToState(Fragment.STARTED, false); 2147 } 2148 2149 public void dispatchResume() { 2150 mStateSaved = false; 2151 moveToState(Fragment.RESUMED, false); 2152 } 2153 2154 public void dispatchPause() { 2155 moveToState(Fragment.STARTED, false); 2156 } 2157 2158 public void dispatchStop() { 2159 // See saveAllState() for the explanation of this. We do this for 2160 // all platform versions, to keep our behavior more consistent between 2161 // them. 2162 mStateSaved = true; 2163 2164 moveToState(Fragment.STOPPED, false); 2165 } 2166 2167 public void dispatchReallyStop() { 2168 moveToState(Fragment.ACTIVITY_CREATED, false); 2169 } 2170 2171 public void dispatchDestroyView() { 2172 moveToState(Fragment.CREATED, false); 2173 } 2174 2175 public void dispatchDestroy() { 2176 mDestroyed = true; 2177 execPendingActions(); 2178 moveToState(Fragment.INITIALIZING, false); 2179 mHost = null; 2180 mContainer = null; 2181 mParent = null; 2182 } 2183 2184 public void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode) { 2185 if (mAdded == null) { 2186 return; 2187 } 2188 for (int i = mAdded.size() - 1; i >= 0; --i) { 2189 final android.support.v4.app.Fragment f = mAdded.get(i); 2190 if (f != null) { 2191 f.performMultiWindowModeChanged(isInMultiWindowMode); 2192 } 2193 } 2194 } 2195 2196 public void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 2197 if (mAdded == null) { 2198 return; 2199 } 2200 for (int i = mAdded.size() - 1; i >= 0; --i) { 2201 final android.support.v4.app.Fragment f = mAdded.get(i); 2202 if (f != null) { 2203 f.performPictureInPictureModeChanged(isInPictureInPictureMode); 2204 } 2205 } 2206 } 2207 2208 public void dispatchConfigurationChanged(Configuration newConfig) { 2209 if (mAdded != null) { 2210 for (int i=0; i<mAdded.size(); i++) { 2211 Fragment f = mAdded.get(i); 2212 if (f != null) { 2213 f.performConfigurationChanged(newConfig); 2214 } 2215 } 2216 } 2217 } 2218 2219 public void dispatchLowMemory() { 2220 if (mAdded != null) { 2221 for (int i=0; i<mAdded.size(); i++) { 2222 Fragment f = mAdded.get(i); 2223 if (f != null) { 2224 f.performLowMemory(); 2225 } 2226 } 2227 } 2228 } 2229 2230 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 2231 boolean show = false; 2232 ArrayList<Fragment> newMenus = null; 2233 if (mAdded != null) { 2234 for (int i=0; i<mAdded.size(); i++) { 2235 Fragment f = mAdded.get(i); 2236 if (f != null) { 2237 if (f.performCreateOptionsMenu(menu, inflater)) { 2238 show = true; 2239 if (newMenus == null) { 2240 newMenus = new ArrayList<Fragment>(); 2241 } 2242 newMenus.add(f); 2243 } 2244 } 2245 } 2246 } 2247 2248 if (mCreatedMenus != null) { 2249 for (int i=0; i<mCreatedMenus.size(); i++) { 2250 Fragment f = mCreatedMenus.get(i); 2251 if (newMenus == null || !newMenus.contains(f)) { 2252 f.onDestroyOptionsMenu(); 2253 } 2254 } 2255 } 2256 2257 mCreatedMenus = newMenus; 2258 2259 return show; 2260 } 2261 2262 public boolean dispatchPrepareOptionsMenu(Menu menu) { 2263 boolean show = false; 2264 if (mAdded != null) { 2265 for (int i=0; i<mAdded.size(); i++) { 2266 Fragment f = mAdded.get(i); 2267 if (f != null) { 2268 if (f.performPrepareOptionsMenu(menu)) { 2269 show = true; 2270 } 2271 } 2272 } 2273 } 2274 return show; 2275 } 2276 2277 public boolean dispatchOptionsItemSelected(MenuItem item) { 2278 if (mAdded != null) { 2279 for (int i=0; i<mAdded.size(); i++) { 2280 Fragment f = mAdded.get(i); 2281 if (f != null) { 2282 if (f.performOptionsItemSelected(item)) { 2283 return true; 2284 } 2285 } 2286 } 2287 } 2288 return false; 2289 } 2290 2291 public boolean dispatchContextItemSelected(MenuItem item) { 2292 if (mAdded != null) { 2293 for (int i=0; i<mAdded.size(); i++) { 2294 Fragment f = mAdded.get(i); 2295 if (f != null) { 2296 if (f.performContextItemSelected(item)) { 2297 return true; 2298 } 2299 } 2300 } 2301 } 2302 return false; 2303 } 2304 2305 public void dispatchOptionsMenuClosed(Menu menu) { 2306 if (mAdded != null) { 2307 for (int i=0; i<mAdded.size(); i++) { 2308 Fragment f = mAdded.get(i); 2309 if (f != null) { 2310 f.performOptionsMenuClosed(menu); 2311 } 2312 } 2313 } 2314 } 2315 2316 public static int reverseTransit(int transit) { 2317 int rev = 0; 2318 switch (transit) { 2319 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2320 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 2321 break; 2322 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2323 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 2324 break; 2325 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2326 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 2327 break; 2328 } 2329 return rev; 2330 2331 } 2332 2333 public static final int ANIM_STYLE_OPEN_ENTER = 1; 2334 public static final int ANIM_STYLE_OPEN_EXIT = 2; 2335 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 2336 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 2337 public static final int ANIM_STYLE_FADE_ENTER = 5; 2338 public static final int ANIM_STYLE_FADE_EXIT = 6; 2339 2340 public static int transitToStyleIndex(int transit, boolean enter) { 2341 int animAttr = -1; 2342 switch (transit) { 2343 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2344 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 2345 break; 2346 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2347 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 2348 break; 2349 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2350 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 2351 break; 2352 } 2353 return animAttr; 2354 } 2355 2356 @Override 2357 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 2358 if (!"fragment".equals(name)) { 2359 return null; 2360 } 2361 2362 String fname = attrs.getAttributeValue(null, "class"); 2363 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 2364 if (fname == null) { 2365 fname = a.getString(FragmentTag.Fragment_name); 2366 } 2367 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 2368 String tag = a.getString(FragmentTag.Fragment_tag); 2369 a.recycle(); 2370 2371 if (!Fragment.isSupportFragmentClass(mHost.getContext(), fname)) { 2372 // Invalid support lib fragment; let the device's framework handle it. 2373 // This will allow android.app.Fragments to do the right thing. 2374 return null; 2375 } 2376 2377 int containerId = parent != null ? parent.getId() : 0; 2378 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 2379 throw new IllegalArgumentException(attrs.getPositionDescription() 2380 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 2381 } 2382 2383 // If we restored from a previous state, we may already have 2384 // instantiated this fragment from the state and should use 2385 // that instance instead of making a new one. 2386 Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null; 2387 if (fragment == null && tag != null) { 2388 fragment = findFragmentByTag(tag); 2389 } 2390 if (fragment == null && containerId != View.NO_ID) { 2391 fragment = findFragmentById(containerId); 2392 } 2393 2394 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 2395 + Integer.toHexString(id) + " fname=" + fname 2396 + " existing=" + fragment); 2397 if (fragment == null) { 2398 fragment = Fragment.instantiate(context, fname); 2399 fragment.mFromLayout = true; 2400 fragment.mFragmentId = id != 0 ? id : containerId; 2401 fragment.mContainerId = containerId; 2402 fragment.mTag = tag; 2403 fragment.mInLayout = true; 2404 fragment.mFragmentManager = this; 2405 fragment.mHost = mHost; 2406 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2407 addFragment(fragment, true); 2408 2409 } else if (fragment.mInLayout) { 2410 // A fragment already exists and it is not one we restored from 2411 // previous state. 2412 throw new IllegalArgumentException(attrs.getPositionDescription() 2413 + ": Duplicate id 0x" + Integer.toHexString(id) 2414 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 2415 + " with another fragment for " + fname); 2416 } else { 2417 // This fragment was retained from a previous instance; get it 2418 // going now. 2419 fragment.mInLayout = true; 2420 fragment.mHost = mHost; 2421 // If this fragment is newly instantiated (either right now, or 2422 // from last saved state), then give it the attributes to 2423 // initialize itself. 2424 if (!fragment.mRetaining) { 2425 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2426 } 2427 } 2428 2429 // If we haven't finished entering the CREATED state ourselves yet, 2430 // push the inflated child fragment along. 2431 if (mCurState < Fragment.CREATED && fragment.mFromLayout) { 2432 moveToState(fragment, Fragment.CREATED, 0, 0, false); 2433 } else { 2434 moveToState(fragment); 2435 } 2436 2437 if (fragment.mView == null) { 2438 throw new IllegalStateException("Fragment " + fname 2439 + " did not create a view."); 2440 } 2441 if (id != 0) { 2442 fragment.mView.setId(id); 2443 } 2444 if (fragment.mView.getTag() == null) { 2445 fragment.mView.setTag(tag); 2446 } 2447 return fragment.mView; 2448 } 2449 2450 LayoutInflaterFactory getLayoutInflaterFactory() { 2451 return this; 2452 } 2453 2454 static class FragmentTag { 2455 public static final int[] Fragment = { 2456 0x01010003, 0x010100d0, 0x010100d1 2457 }; 2458 public static final int Fragment_id = 1; 2459 public static final int Fragment_name = 0; 2460 public static final int Fragment_tag = 2; 2461 } 2462} 2463