FragmentManager.java revision fda5be2466024a656152015c45a7681361d399bb
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.support.v4.app; 18 19import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; 20 21import android.animation.Animator; 22import android.animation.AnimatorInflater; 23import android.animation.AnimatorListenerAdapter; 24import android.animation.AnimatorSet; 25import android.animation.PropertyValuesHolder; 26import android.animation.ValueAnimator; 27import android.content.Context; 28import android.content.res.Configuration; 29import android.content.res.Resources.NotFoundException; 30import android.content.res.TypedArray; 31import android.os.Build; 32import android.os.Bundle; 33import android.os.Looper; 34import android.os.Parcel; 35import android.os.Parcelable; 36import android.support.annotation.CallSuper; 37import android.support.annotation.IdRes; 38import android.support.annotation.NonNull; 39import android.support.annotation.RestrictTo; 40import android.support.annotation.StringRes; 41import android.support.v4.util.ArraySet; 42import android.support.v4.util.DebugUtils; 43import android.support.v4.util.LogWriter; 44import android.support.v4.util.Pair; 45import android.support.v4.view.ViewCompat; 46import android.util.AttributeSet; 47import android.util.Log; 48import android.util.SparseArray; 49import android.view.LayoutInflater; 50import android.view.Menu; 51import android.view.MenuInflater; 52import android.view.MenuItem; 53import android.view.View; 54import android.view.ViewGroup; 55import android.view.animation.AccelerateInterpolator; 56import android.view.animation.AlphaAnimation; 57import android.view.animation.Animation; 58import android.view.animation.Animation.AnimationListener; 59import android.view.animation.AnimationSet; 60import android.view.animation.AnimationUtils; 61import android.view.animation.DecelerateInterpolator; 62import android.view.animation.Interpolator; 63import android.view.animation.ScaleAnimation; 64 65import java.io.FileDescriptor; 66import java.io.PrintWriter; 67import java.lang.reflect.Field; 68import java.util.ArrayList; 69import java.util.Arrays; 70import java.util.Collections; 71import java.util.List; 72import java.util.concurrent.CopyOnWriteArrayList; 73 74/** 75 * Static library support version of the framework's {@link android.app.FragmentManager}. 76 * Used to write apps that run on platforms prior to Android 3.0. When running 77 * on Android 3.0 or above, this implementation is still used; it does not try 78 * to switch to the framework's implementation. See the framework {@link FragmentManager} 79 * documentation for a class overview. 80 * 81 * <p>Your activity must derive from {@link FragmentActivity} to use this. From such an activity, 82 * you can acquire the {@link FragmentManager} by calling 83 * {@link FragmentActivity#getSupportFragmentManager}. 84 */ 85public abstract class FragmentManager { 86 /** 87 * Representation of an entry on the fragment back stack, as created 88 * with {@link FragmentTransaction#addToBackStack(String) 89 * FragmentTransaction.addToBackStack()}. Entries can later be 90 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 91 * FragmentManager.getBackStackEntryAt()}. 92 * 93 * <p>Note that you should never hold on to a BackStackEntry object; 94 * the identifier as returned by {@link #getId} is the only thing that 95 * will be persisted across activity instances. 96 */ 97 public interface BackStackEntry { 98 /** 99 * Return the unique identifier for the entry. This is the only 100 * representation of the entry that will persist across activity 101 * instances. 102 */ 103 public int getId(); 104 105 /** 106 * Get the name that was supplied to 107 * {@link FragmentTransaction#addToBackStack(String) 108 * FragmentTransaction.addToBackStack(String)} when creating this entry. 109 */ 110 public String getName(); 111 112 /** 113 * Return the full bread crumb title resource identifier for the entry, 114 * or 0 if it does not have one. 115 */ 116 @StringRes 117 public int getBreadCrumbTitleRes(); 118 119 /** 120 * Return the short bread crumb title resource identifier for the entry, 121 * or 0 if it does not have one. 122 */ 123 @StringRes 124 public int getBreadCrumbShortTitleRes(); 125 126 /** 127 * Return the full bread crumb title for the entry, or null if it 128 * does not have one. 129 */ 130 public CharSequence getBreadCrumbTitle(); 131 132 /** 133 * Return the short bread crumb title for the entry, or null if it 134 * does not have one. 135 */ 136 public CharSequence getBreadCrumbShortTitle(); 137 } 138 139 /** 140 * Interface to watch for changes to the back stack. 141 */ 142 public interface OnBackStackChangedListener { 143 /** 144 * Called whenever the contents of the back stack change. 145 */ 146 public void onBackStackChanged(); 147 } 148 149 /** 150 * Start a series of edit operations on the Fragments associated with 151 * this FragmentManager. 152 * 153 * <p>Note: A fragment transaction can only be created/committed prior 154 * to an activity saving its state. If you try to commit a transaction 155 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 156 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 157 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 158 * This is because the framework takes care of saving your current fragments 159 * in the state, and if changes are made after the state is saved then they 160 * will be lost.</p> 161 */ 162 public abstract FragmentTransaction beginTransaction(); 163 164 /** 165 * @hide -- remove once prebuilts are in. 166 * @deprecated 167 */ 168 @RestrictTo(LIBRARY_GROUP) 169 @Deprecated 170 public FragmentTransaction openTransaction() { 171 return beginTransaction(); 172 } 173 174 /** 175 * After a {@link FragmentTransaction} is committed with 176 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 177 * is scheduled to be executed asynchronously on the process's main thread. 178 * If you want to immediately executing any such pending operations, you 179 * can call this function (only from the main thread) to do so. Note that 180 * all callbacks and other related behavior will be done from within this 181 * call, so be careful about where this is called from. 182 * 183 * <p>If you are committing a single transaction that does not modify the 184 * fragment back stack, strongly consider using 185 * {@link FragmentTransaction#commitNow()} instead. This can help avoid 186 * unwanted side effects when other code in your app has pending committed 187 * transactions that expect different timing.</p> 188 * <p> 189 * This also forces the start of any postponed Transactions where 190 * {@link Fragment#postponeEnterTransition()} has been called. 191 * 192 * @return Returns true if there were any pending transactions to be 193 * executed. 194 */ 195 public abstract boolean executePendingTransactions(); 196 197 /** 198 * Finds a fragment that was identified by the given id either when inflated 199 * from XML or as the container ID when added in a transaction. This first 200 * searches through fragments that are currently added to the manager's 201 * activity; if no such fragment is found, then all fragments currently 202 * on the back stack associated with this ID are searched. 203 * @return The fragment if found or null otherwise. 204 */ 205 public abstract Fragment findFragmentById(@IdRes int id); 206 207 /** 208 * Finds a fragment that was identified by the given tag either when inflated 209 * from XML or as supplied when added in a transaction. This first 210 * searches through fragments that are currently added to the manager's 211 * activity; if no such fragment is found, then all fragments currently 212 * on the back stack are searched. 213 * @return The fragment if found or null otherwise. 214 */ 215 public abstract Fragment findFragmentByTag(String tag); 216 217 /** 218 * Flag for {@link #popBackStack(String, int)} 219 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 220 * a back stack entry has been supplied, then all matching entries will 221 * be consumed until one that doesn't match is found or the bottom of 222 * the stack is reached. Otherwise, all entries up to but not including that entry 223 * will be removed. 224 */ 225 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 226 227 /** 228 * Pop the top state off the back stack. Returns true if there was one 229 * to pop, else false. This function is asynchronous -- it enqueues the 230 * request to pop, but the action will not be performed until the application 231 * returns to its event loop. 232 */ 233 public abstract void popBackStack(); 234 235 /** 236 * Like {@link #popBackStack()}, but performs the operation immediately 237 * inside of the call. This is like calling {@link #executePendingTransactions()} 238 * afterwards without forcing the start of postponed Transactions. 239 * @return Returns true if there was something popped, else false. 240 */ 241 public abstract boolean popBackStackImmediate(); 242 243 /** 244 * Pop the last fragment transition from the manager's fragment 245 * back stack. If there is nothing to pop, false is returned. 246 * This function is asynchronous -- it enqueues the 247 * request to pop, but the action will not be performed until the application 248 * returns to its event loop. 249 * 250 * @param name If non-null, this is the name of a previous back state 251 * to look for; if found, all states up to that state will be popped. The 252 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 253 * the named state itself is popped. If null, only the top state is popped. 254 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 255 */ 256 public abstract void popBackStack(String name, int flags); 257 258 /** 259 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 260 * inside of the call. This is like calling {@link #executePendingTransactions()} 261 * afterwards without forcing the start of postponed Transactions. 262 * @return Returns true if there was something popped, else false. 263 */ 264 public abstract boolean popBackStackImmediate(String name, int flags); 265 266 /** 267 * Pop all back stack states up to the one with the given identifier. 268 * This function is asynchronous -- it enqueues the 269 * request to pop, but the action will not be performed until the application 270 * returns to its event loop. 271 * 272 * @param id Identifier of the stated to be popped. If no identifier exists, 273 * false is returned. 274 * The identifier is the number returned by 275 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 276 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 277 * the named state itself is popped. 278 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 279 */ 280 public abstract void popBackStack(int id, int flags); 281 282 /** 283 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 284 * inside of the call. This is like calling {@link #executePendingTransactions()} 285 * afterwards without forcing the start of postponed Transactions. 286 * @return Returns true if there was something popped, else false. 287 */ 288 public abstract boolean popBackStackImmediate(int id, int flags); 289 290 /** 291 * Return the number of entries currently in the back stack. 292 */ 293 public abstract int getBackStackEntryCount(); 294 295 /** 296 * Return the BackStackEntry at index <var>index</var> in the back stack; 297 * entries start index 0 being the bottom of the stack. 298 */ 299 public abstract BackStackEntry getBackStackEntryAt(int index); 300 301 /** 302 * Add a new listener for changes to the fragment back stack. 303 */ 304 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 305 306 /** 307 * Remove a listener that was previously added with 308 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 309 */ 310 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 311 312 /** 313 * Put a reference to a fragment in a Bundle. This Bundle can be 314 * persisted as saved state, and when later restoring 315 * {@link #getFragment(Bundle, String)} will return the current 316 * instance of the same fragment. 317 * 318 * @param bundle The bundle in which to put the fragment reference. 319 * @param key The name of the entry in the bundle. 320 * @param fragment The Fragment whose reference is to be stored. 321 */ 322 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 323 324 /** 325 * Retrieve the current Fragment instance for a reference previously 326 * placed with {@link #putFragment(Bundle, String, Fragment)}. 327 * 328 * @param bundle The bundle from which to retrieve the fragment reference. 329 * @param key The name of the entry in the bundle. 330 * @return Returns the current Fragment instance that is associated with 331 * the given reference. 332 */ 333 public abstract Fragment getFragment(Bundle bundle, String key); 334 335 /** 336 * Get a list of all fragments that are currently added to the FragmentManager. 337 * This may include those that are hidden as well as those that are shown. 338 * This will not include any fragments only in the back stack, or fragments that 339 * are detached or removed. 340 * <p> 341 * The order of the fragments in the list is the order in which they were 342 * added or attached. 343 * 344 * @return A list of all fragments that are added to the FragmentManager. 345 */ 346 public abstract List<Fragment> getFragments(); 347 348 /** 349 * Save the current instance state of the given Fragment. This can be 350 * used later when creating a new instance of the Fragment and adding 351 * it to the fragment manager, to have it create itself to match the 352 * current state returned here. Note that there are limits on how 353 * this can be used: 354 * 355 * <ul> 356 * <li>The Fragment must currently be attached to the FragmentManager. 357 * <li>A new Fragment created using this saved state must be the same class 358 * type as the Fragment it was created from. 359 * <li>The saved state can not contain dependencies on other fragments -- 360 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 361 * store a fragment reference because that reference may not be valid when 362 * this saved state is later used. Likewise the Fragment's target and 363 * result code are not included in this state. 364 * </ul> 365 * 366 * @param f The Fragment whose state is to be saved. 367 * @return The generated state. This will be null if there was no 368 * interesting state created by the fragment. 369 */ 370 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 371 372 /** 373 * Returns true if the final {@link android.app.Activity#onDestroy() Activity.onDestroy()} 374 * call has been made on the FragmentManager's Activity, so this instance is now dead. 375 */ 376 public abstract boolean isDestroyed(); 377 378 /** 379 * Registers a {@link FragmentLifecycleCallbacks} to listen to fragment lifecycle events 380 * happening in this FragmentManager. All registered callbacks will be automatically 381 * unregistered when this FragmentManager is destroyed. 382 * 383 * @param cb Callbacks to register 384 * @param recursive true to automatically register this callback for all child FragmentManagers 385 */ 386 public abstract void registerFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb, 387 boolean recursive); 388 389 /** 390 * Unregisters a previously registered {@link FragmentLifecycleCallbacks}. If the callback 391 * was not previously registered this call has no effect. All registered callbacks will be 392 * automatically unregistered when this FragmentManager is destroyed. 393 * 394 * @param cb Callbacks to unregister 395 */ 396 public abstract void unregisterFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb); 397 398 /** 399 * Return the currently active primary navigation fragment for this FragmentManager. 400 * 401 * <p>The primary navigation fragment's 402 * {@link Fragment#getChildFragmentManager() child FragmentManager} will be called first 403 * to process delegated navigation actions such as {@link #popBackStack()} if no ID 404 * or transaction name is provided to pop to.</p> 405 * 406 * @return the fragment designated as the primary navigation fragment 407 */ 408 public abstract Fragment getPrimaryNavigationFragment(); 409 410 /** 411 * Print the FragmentManager's state into the given stream. 412 * 413 * @param prefix Text to print at the front of each line. 414 * @param fd The raw file descriptor that the dump is being sent to. 415 * @param writer A PrintWriter to which the dump is to be set. 416 * @param args Additional arguments to the dump request. 417 */ 418 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 419 420 /** 421 * Control whether the framework's internal fragment manager debugging 422 * logs are turned on. If enabled, you will see output in logcat as 423 * the framework performs fragment operations. 424 */ 425 public static void enableDebugLogging(boolean enabled) { 426 FragmentManagerImpl.DEBUG = enabled; 427 } 428 429 /** 430 * Returns {@code true} if the FragmentManager's state has already been saved 431 * by its host. Any operations that would change saved state should not be performed 432 * if this method returns true. For example, any popBackStack() method, such as 433 * {@link #popBackStackImmediate()} or any FragmentTransaction using 434 * {@link FragmentTransaction#commit()} instead of 435 * {@link FragmentTransaction#commitAllowingStateLoss()} will change 436 * the state and will result in an error. 437 * 438 * @return true if this FragmentManager's state has already been saved by its host 439 */ 440 public abstract boolean isStateSaved(); 441 442 /** 443 * Callback interface for listening to fragment state changes that happen 444 * within a given FragmentManager. 445 */ 446 public abstract static class FragmentLifecycleCallbacks { 447 /** 448 * Called right before the fragment's {@link Fragment#onAttach(Context)} method is called. 449 * This is a good time to inject any required dependencies for the fragment before any of 450 * the fragment's lifecycle methods are invoked. 451 * 452 * @param fm Host FragmentManager 453 * @param f Fragment changing state 454 * @param context Context that the Fragment is being attached to 455 */ 456 public void onFragmentPreAttached(FragmentManager fm, Fragment f, Context context) {} 457 458 /** 459 * Called after the fragment has been attached to its host. Its host will have had 460 * <code>onAttachFragment</code> called before this call happens. 461 * 462 * @param fm Host FragmentManager 463 * @param f Fragment changing state 464 * @param context Context that the Fragment was attached to 465 */ 466 public void onFragmentAttached(FragmentManager fm, Fragment f, Context context) {} 467 468 /** 469 * Called after the fragment has returned from the FragmentManager's call to 470 * {@link Fragment#onCreate(Bundle)}. This will only happen once for any given 471 * fragment instance, though the fragment may be attached and detached multiple times. 472 * 473 * @param fm Host FragmentManager 474 * @param f Fragment changing state 475 * @param savedInstanceState Saved instance bundle from a previous instance 476 */ 477 public void onFragmentCreated(FragmentManager fm, Fragment f, Bundle savedInstanceState) {} 478 479 /** 480 * Called after the fragment has returned from the FragmentManager's call to 481 * {@link Fragment#onActivityCreated(Bundle)}. This will only happen once for any given 482 * fragment instance, though the fragment may be attached and detached multiple times. 483 * 484 * @param fm Host FragmentManager 485 * @param f Fragment changing state 486 * @param savedInstanceState Saved instance bundle from a previous instance 487 */ 488 public void onFragmentActivityCreated(FragmentManager fm, Fragment f, 489 Bundle savedInstanceState) {} 490 491 /** 492 * Called after the fragment has returned a non-null view from the FragmentManager's 493 * request to {@link Fragment#onCreateView(LayoutInflater, ViewGroup, Bundle)}. 494 * 495 * @param fm Host FragmentManager 496 * @param f Fragment that created and owns the view 497 * @param v View returned by the fragment 498 * @param savedInstanceState Saved instance bundle from a previous instance 499 */ 500 public void onFragmentViewCreated(FragmentManager fm, Fragment f, View v, 501 Bundle savedInstanceState) {} 502 503 /** 504 * Called after the fragment has returned from the FragmentManager's call to 505 * {@link Fragment#onStart()}. 506 * 507 * @param fm Host FragmentManager 508 * @param f Fragment changing state 509 */ 510 public void onFragmentStarted(FragmentManager fm, Fragment f) {} 511 512 /** 513 * Called after the fragment has returned from the FragmentManager's call to 514 * {@link Fragment#onResume()}. 515 * 516 * @param fm Host FragmentManager 517 * @param f Fragment changing state 518 */ 519 public void onFragmentResumed(FragmentManager fm, Fragment f) {} 520 521 /** 522 * Called after the fragment has returned from the FragmentManager's call to 523 * {@link Fragment#onPause()}. 524 * 525 * @param fm Host FragmentManager 526 * @param f Fragment changing state 527 */ 528 public void onFragmentPaused(FragmentManager fm, Fragment f) {} 529 530 /** 531 * Called after the fragment has returned from the FragmentManager's call to 532 * {@link Fragment#onStop()}. 533 * 534 * @param fm Host FragmentManager 535 * @param f Fragment changing state 536 */ 537 public void onFragmentStopped(FragmentManager fm, Fragment f) {} 538 539 /** 540 * Called after the fragment has returned from the FragmentManager's call to 541 * {@link Fragment#onSaveInstanceState(Bundle)}. 542 * 543 * @param fm Host FragmentManager 544 * @param f Fragment changing state 545 * @param outState Saved state bundle for the fragment 546 */ 547 public void onFragmentSaveInstanceState(FragmentManager fm, Fragment f, Bundle outState) {} 548 549 /** 550 * Called after the fragment has returned from the FragmentManager's call to 551 * {@link Fragment#onDestroyView()}. 552 * 553 * @param fm Host FragmentManager 554 * @param f Fragment changing state 555 */ 556 public void onFragmentViewDestroyed(FragmentManager fm, Fragment f) {} 557 558 /** 559 * Called after the fragment has returned from the FragmentManager's call to 560 * {@link Fragment#onDestroy()}. 561 * 562 * @param fm Host FragmentManager 563 * @param f Fragment changing state 564 */ 565 public void onFragmentDestroyed(FragmentManager fm, Fragment f) {} 566 567 /** 568 * Called after the fragment has returned from the FragmentManager's call to 569 * {@link Fragment#onDetach()}. 570 * 571 * @param fm Host FragmentManager 572 * @param f Fragment changing state 573 */ 574 public void onFragmentDetached(FragmentManager fm, Fragment f) {} 575 } 576} 577 578final class FragmentManagerState implements Parcelable { 579 FragmentState[] mActive; 580 int[] mAdded; 581 BackStackState[] mBackStack; 582 int mPrimaryNavActiveIndex = -1; 583 int mNextFragmentIndex; 584 585 public FragmentManagerState() { 586 } 587 588 public FragmentManagerState(Parcel in) { 589 mActive = in.createTypedArray(FragmentState.CREATOR); 590 mAdded = in.createIntArray(); 591 mBackStack = in.createTypedArray(BackStackState.CREATOR); 592 mPrimaryNavActiveIndex = in.readInt(); 593 mNextFragmentIndex = in.readInt(); 594 } 595 596 @Override 597 public int describeContents() { 598 return 0; 599 } 600 601 @Override 602 public void writeToParcel(Parcel dest, int flags) { 603 dest.writeTypedArray(mActive, flags); 604 dest.writeIntArray(mAdded); 605 dest.writeTypedArray(mBackStack, flags); 606 dest.writeInt(mPrimaryNavActiveIndex); 607 dest.writeInt(mNextFragmentIndex); 608 } 609 610 public static final Parcelable.Creator<FragmentManagerState> CREATOR 611 = new Parcelable.Creator<FragmentManagerState>() { 612 @Override 613 public FragmentManagerState createFromParcel(Parcel in) { 614 return new FragmentManagerState(in); 615 } 616 617 @Override 618 public FragmentManagerState[] newArray(int size) { 619 return new FragmentManagerState[size]; 620 } 621 }; 622} 623 624/** 625 * Container for fragments associated with an activity. 626 */ 627final class FragmentManagerImpl extends FragmentManager implements LayoutInflater.Factory2 { 628 static boolean DEBUG = false; 629 static final String TAG = "FragmentManager"; 630 631 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 632 static final String TARGET_STATE_TAG = "android:target_state"; 633 static final String VIEW_STATE_TAG = "android:view_state"; 634 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 635 636 ArrayList<OpGenerator> mPendingActions; 637 boolean mExecutingActions; 638 639 int mNextFragmentIndex = 0; 640 641 ArrayList<Fragment> mAdded; 642 SparseArray<Fragment> mActive; 643 ArrayList<BackStackRecord> mBackStack; 644 ArrayList<Fragment> mCreatedMenus; 645 646 // Must be accessed while locked. 647 ArrayList<BackStackRecord> mBackStackIndices; 648 ArrayList<Integer> mAvailBackStackIndices; 649 650 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 651 private CopyOnWriteArrayList<Pair<FragmentLifecycleCallbacks, Boolean>> mLifecycleCallbacks; 652 653 int mCurState = Fragment.INITIALIZING; 654 FragmentHostCallback mHost; 655 FragmentContainer mContainer; 656 Fragment mParent; 657 Fragment mPrimaryNav; 658 659 static Field sAnimationListenerField = null; 660 661 boolean mNeedMenuInvalidate; 662 boolean mStateSaved; 663 boolean mDestroyed; 664 String mNoTransactionsBecause; 665 boolean mHavePendingDeferredStart; 666 667 // Temporary vars for removing redundant operations in BackStackRecords: 668 ArrayList<BackStackRecord> mTmpRecords; 669 ArrayList<Boolean> mTmpIsPop; 670 ArrayList<Fragment> mTmpAddedFragments; 671 672 // Temporary vars for state save and restore. 673 Bundle mStateBundle = null; 674 SparseArray<Parcelable> mStateArray = null; 675 676 // Postponed transactions. 677 ArrayList<StartEnterTransitionListener> mPostponedTransactions; 678 679 // Saved FragmentManagerNonConfig during saveAllState() and cleared in noteStateNotSaved() 680 FragmentManagerNonConfig mSavedNonConfig; 681 682 Runnable mExecCommit = new Runnable() { 683 @Override 684 public void run() { 685 execPendingActions(); 686 } 687 }; 688 689 static boolean modifiesAlpha(AnimationOrAnimator anim) { 690 if (anim.animation instanceof AlphaAnimation) { 691 return true; 692 } else if (anim.animation instanceof AnimationSet) { 693 List<Animation> anims = ((AnimationSet) anim.animation).getAnimations(); 694 for (int i = 0; i < anims.size(); i++) { 695 if (anims.get(i) instanceof AlphaAnimation) { 696 return true; 697 } 698 } 699 return false; 700 } else { 701 return modifiesAlpha(anim.animator); 702 } 703 } 704 705 static boolean modifiesAlpha(Animator anim) { 706 if (anim == null) { 707 return false; 708 } 709 if (anim instanceof ValueAnimator) { 710 ValueAnimator valueAnim = (ValueAnimator) anim; 711 PropertyValuesHolder[] values = valueAnim.getValues(); 712 for (int i = 0; i < values.length; i++) { 713 if (("alpha").equals(values[i].getPropertyName())) { 714 return true; 715 } 716 } 717 } else if (anim instanceof AnimatorSet) { 718 List<Animator> animList = ((AnimatorSet) anim).getChildAnimations(); 719 for (int i = 0; i < animList.size(); i++) { 720 if (modifiesAlpha(animList.get(i))) { 721 return true; 722 } 723 } 724 } 725 return false; 726 } 727 728 static boolean shouldRunOnHWLayer(View v, AnimationOrAnimator anim) { 729 if (v == null || anim == null) { 730 return false; 731 } 732 return Build.VERSION.SDK_INT >= 19 733 && v.getLayerType() == View.LAYER_TYPE_NONE 734 && ViewCompat.hasOverlappingRendering(v) 735 && modifiesAlpha(anim); 736 } 737 738 private void throwException(RuntimeException ex) { 739 Log.e(TAG, ex.getMessage()); 740 Log.e(TAG, "Activity state:"); 741 LogWriter logw = new LogWriter(TAG); 742 PrintWriter pw = new PrintWriter(logw); 743 if (mHost != null) { 744 try { 745 mHost.onDump(" ", null, pw, new String[] { }); 746 } catch (Exception e) { 747 Log.e(TAG, "Failed dumping state", e); 748 } 749 } else { 750 try { 751 dump(" ", null, pw, new String[] { }); 752 } catch (Exception e) { 753 Log.e(TAG, "Failed dumping state", e); 754 } 755 } 756 throw ex; 757 } 758 759 @Override 760 public FragmentTransaction beginTransaction() { 761 return new BackStackRecord(this); 762 } 763 764 @Override 765 public boolean executePendingTransactions() { 766 boolean updates = execPendingActions(); 767 forcePostponedTransactions(); 768 return updates; 769 } 770 771 @Override 772 public void popBackStack() { 773 enqueueAction(new PopBackStackState(null, -1, 0), false); 774 } 775 776 @Override 777 public boolean popBackStackImmediate() { 778 checkStateLoss(); 779 return popBackStackImmediate(null, -1, 0); 780 } 781 782 @Override 783 public void popBackStack(final String name, final int flags) { 784 enqueueAction(new PopBackStackState(name, -1, flags), false); 785 } 786 787 @Override 788 public boolean popBackStackImmediate(String name, int flags) { 789 checkStateLoss(); 790 return popBackStackImmediate(name, -1, flags); 791 } 792 793 @Override 794 public void popBackStack(final int id, final int flags) { 795 if (id < 0) { 796 throw new IllegalArgumentException("Bad id: " + id); 797 } 798 enqueueAction(new PopBackStackState(null, id, flags), false); 799 } 800 801 @Override 802 public boolean popBackStackImmediate(int id, int flags) { 803 checkStateLoss(); 804 execPendingActions(); 805 if (id < 0) { 806 throw new IllegalArgumentException("Bad id: " + id); 807 } 808 return popBackStackImmediate(null, id, flags); 809 } 810 811 /** 812 * Used by all public popBackStackImmediate methods, this executes pending transactions and 813 * returns true if the pop action did anything, regardless of what other pending 814 * transactions did. 815 * 816 * @return true if the pop operation did anything or false otherwise. 817 */ 818 private boolean popBackStackImmediate(String name, int id, int flags) { 819 execPendingActions(); 820 ensureExecReady(true); 821 822 if (mPrimaryNav != null // We have a primary nav fragment 823 && id < 0 // No valid id (since they're local) 824 && name == null) { // no name to pop to (since they're local) 825 final FragmentManager childManager = mPrimaryNav.peekChildFragmentManager(); 826 if (childManager != null && childManager.popBackStackImmediate()) { 827 // We did something, just not to this specific FragmentManager. Return true. 828 return true; 829 } 830 } 831 832 boolean executePop = popBackStackState(mTmpRecords, mTmpIsPop, name, id, flags); 833 if (executePop) { 834 mExecutingActions = true; 835 try { 836 removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop); 837 } finally { 838 cleanupExec(); 839 } 840 } 841 842 doPendingDeferredStart(); 843 burpActive(); 844 return executePop; 845 } 846 847 @Override 848 public int getBackStackEntryCount() { 849 return mBackStack != null ? mBackStack.size() : 0; 850 } 851 852 @Override 853 public BackStackEntry getBackStackEntryAt(int index) { 854 return mBackStack.get(index); 855 } 856 857 @Override 858 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 859 if (mBackStackChangeListeners == null) { 860 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 861 } 862 mBackStackChangeListeners.add(listener); 863 } 864 865 @Override 866 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 867 if (mBackStackChangeListeners != null) { 868 mBackStackChangeListeners.remove(listener); 869 } 870 } 871 872 @Override 873 public void putFragment(Bundle bundle, String key, Fragment fragment) { 874 if (fragment.mIndex < 0) { 875 throwException(new IllegalStateException("Fragment " + fragment 876 + " is not currently in the FragmentManager")); 877 } 878 bundle.putInt(key, fragment.mIndex); 879 } 880 881 @Override 882 public Fragment getFragment(Bundle bundle, String key) { 883 int index = bundle.getInt(key, -1); 884 if (index == -1) { 885 return null; 886 } 887 Fragment f = mActive.get(index); 888 if (f == null) { 889 throwException(new IllegalStateException("Fragment no longer exists for key " 890 + key + ": index " + index)); 891 } 892 return f; 893 } 894 895 @Override 896 public List<Fragment> getFragments() { 897 if (mAdded == null) { 898 return Collections.EMPTY_LIST; 899 } 900 synchronized (mAdded) { 901 return (List<Fragment>) mAdded.clone(); 902 } 903 } 904 905 /** 906 * This is used by FragmentController to get the Active fragments. 907 * 908 * @return A list of active fragments in the fragment manager, including those that are in the 909 * back stack. 910 */ 911 List<Fragment> getActiveFragments() { 912 if (mActive == null) { 913 return null; 914 } 915 final int count = mActive.size(); 916 ArrayList<Fragment> fragments = new ArrayList<>(count); 917 for (int i = 0; i < count; i++) { 918 fragments.add(mActive.valueAt(i)); 919 } 920 return fragments; 921 } 922 923 /** 924 * Used by FragmentController to get the number of Active Fragments. 925 * 926 * @return The number of active fragments. 927 */ 928 int getActiveFragmentCount() { 929 if (mActive == null) { 930 return 0; 931 } 932 return mActive.size(); 933 } 934 935 @Override 936 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 937 if (fragment.mIndex < 0) { 938 throwException( new IllegalStateException("Fragment " + fragment 939 + " is not currently in the FragmentManager")); 940 } 941 if (fragment.mState > Fragment.INITIALIZING) { 942 Bundle result = saveFragmentBasicState(fragment); 943 return result != null ? new Fragment.SavedState(result) : null; 944 } 945 return null; 946 } 947 948 @Override 949 public boolean isDestroyed() { 950 return mDestroyed; 951 } 952 953 @Override 954 public String toString() { 955 StringBuilder sb = new StringBuilder(128); 956 sb.append("FragmentManager{"); 957 sb.append(Integer.toHexString(System.identityHashCode(this))); 958 sb.append(" in "); 959 if (mParent != null) { 960 DebugUtils.buildShortClassTag(mParent, sb); 961 } else { 962 DebugUtils.buildShortClassTag(mHost, sb); 963 } 964 sb.append("}}"); 965 return sb.toString(); 966 } 967 968 @Override 969 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 970 String innerPrefix = prefix + " "; 971 972 int N; 973 if (mActive != null) { 974 N = mActive.size(); 975 if (N > 0) { 976 writer.print(prefix); writer.print("Active Fragments in "); 977 writer.print(Integer.toHexString(System.identityHashCode(this))); 978 writer.println(":"); 979 for (int i=0; i<N; i++) { 980 Fragment f = mActive.valueAt(i); 981 writer.print(prefix); writer.print(" #"); writer.print(i); 982 writer.print(": "); writer.println(f); 983 if (f != null) { 984 f.dump(innerPrefix, fd, writer, args); 985 } 986 } 987 } 988 } 989 990 if (mAdded != null) { 991 N = mAdded.size(); 992 if (N > 0) { 993 writer.print(prefix); writer.println("Added Fragments:"); 994 for (int i=0; i<N; i++) { 995 Fragment f = mAdded.get(i); 996 writer.print(prefix); writer.print(" #"); writer.print(i); 997 writer.print(": "); writer.println(f.toString()); 998 } 999 } 1000 } 1001 1002 if (mCreatedMenus != null) { 1003 N = mCreatedMenus.size(); 1004 if (N > 0) { 1005 writer.print(prefix); writer.println("Fragments Created Menus:"); 1006 for (int i=0; i<N; i++) { 1007 Fragment f = mCreatedMenus.get(i); 1008 writer.print(prefix); writer.print(" #"); writer.print(i); 1009 writer.print(": "); writer.println(f.toString()); 1010 } 1011 } 1012 } 1013 1014 if (mBackStack != null) { 1015 N = mBackStack.size(); 1016 if (N > 0) { 1017 writer.print(prefix); writer.println("Back Stack:"); 1018 for (int i=0; i<N; i++) { 1019 BackStackRecord bs = mBackStack.get(i); 1020 writer.print(prefix); writer.print(" #"); writer.print(i); 1021 writer.print(": "); writer.println(bs.toString()); 1022 bs.dump(innerPrefix, fd, writer, args); 1023 } 1024 } 1025 } 1026 1027 synchronized (this) { 1028 if (mBackStackIndices != null) { 1029 N = mBackStackIndices.size(); 1030 if (N > 0) { 1031 writer.print(prefix); writer.println("Back Stack Indices:"); 1032 for (int i=0; i<N; i++) { 1033 BackStackRecord bs = mBackStackIndices.get(i); 1034 writer.print(prefix); writer.print(" #"); writer.print(i); 1035 writer.print(": "); writer.println(bs); 1036 } 1037 } 1038 } 1039 1040 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 1041 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 1042 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 1043 } 1044 } 1045 1046 if (mPendingActions != null) { 1047 N = mPendingActions.size(); 1048 if (N > 0) { 1049 writer.print(prefix); writer.println("Pending Actions:"); 1050 for (int i=0; i<N; i++) { 1051 OpGenerator r = mPendingActions.get(i); 1052 writer.print(prefix); writer.print(" #"); writer.print(i); 1053 writer.print(": "); writer.println(r); 1054 } 1055 } 1056 } 1057 1058 writer.print(prefix); writer.println("FragmentManager misc state:"); 1059 writer.print(prefix); writer.print(" mHost="); writer.println(mHost); 1060 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 1061 if (mParent != null) { 1062 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 1063 } 1064 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 1065 writer.print(" mStateSaved="); writer.print(mStateSaved); 1066 writer.print(" mDestroyed="); writer.println(mDestroyed); 1067 if (mNeedMenuInvalidate) { 1068 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 1069 writer.println(mNeedMenuInvalidate); 1070 } 1071 if (mNoTransactionsBecause != null) { 1072 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 1073 writer.println(mNoTransactionsBecause); 1074 } 1075 } 1076 1077 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 1078 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 1079 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 1080 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 1081 1082 static final int ANIM_DUR = 220; 1083 1084 static AnimationOrAnimator makeOpenCloseAnimation(Context context, float startScale, 1085 float endScale, float startAlpha, float endAlpha) { 1086 AnimationSet set = new AnimationSet(false); 1087 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 1088 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 1089 scale.setInterpolator(DECELERATE_QUINT); 1090 scale.setDuration(ANIM_DUR); 1091 set.addAnimation(scale); 1092 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 1093 alpha.setInterpolator(DECELERATE_CUBIC); 1094 alpha.setDuration(ANIM_DUR); 1095 set.addAnimation(alpha); 1096 return new AnimationOrAnimator(set); 1097 } 1098 1099 static AnimationOrAnimator makeFadeAnimation(Context context, float start, float end) { 1100 AlphaAnimation anim = new AlphaAnimation(start, end); 1101 anim.setInterpolator(DECELERATE_CUBIC); 1102 anim.setDuration(ANIM_DUR); 1103 return new AnimationOrAnimator(anim); 1104 } 1105 1106 AnimationOrAnimator loadAnimation(Fragment fragment, int transit, boolean enter, 1107 int transitionStyle) { 1108 int nextAnim = fragment.getNextAnim(); 1109 Animation animation = fragment.onCreateAnimation(transit, enter, nextAnim); 1110 if (animation != null) { 1111 return new AnimationOrAnimator(animation); 1112 } 1113 1114 Animator animator = fragment.onCreateAnimator(transit, enter, nextAnim); 1115 if (animator != null) { 1116 return new AnimationOrAnimator(animator); 1117 } 1118 1119 if (nextAnim != 0) { 1120 String dir = mHost.getContext().getResources().getResourceTypeName(nextAnim); 1121 boolean isAnim = "anim".equals(dir); 1122 boolean successfulLoad = false; 1123 if (isAnim) { 1124 // try AnimationUtils first 1125 try { 1126 animation = AnimationUtils.loadAnimation(mHost.getContext(), nextAnim); 1127 if (animation != null) { 1128 return new AnimationOrAnimator(animation); 1129 } 1130 // A null animation may be returned and that is acceptable 1131 successfulLoad = true; // succeeded in loading animation, but it is null 1132 } catch (NotFoundException e) { 1133 throw e; // Rethrow it -- the resource should be found if it is provided. 1134 } catch (RuntimeException e) { 1135 // Other exceptions can occur when loading an Animator from AnimationUtils. 1136 } 1137 } 1138 if (!successfulLoad) { 1139 // try Animator 1140 try { 1141 animator = AnimatorInflater.loadAnimator(mHost.getContext(), nextAnim); 1142 if (animator != null) { 1143 return new AnimationOrAnimator(animator); 1144 } 1145 } catch (RuntimeException e) { 1146 if (isAnim) { 1147 // Rethrow it -- we already tried AnimationUtils and it failed. 1148 throw e; 1149 } 1150 // Otherwise, it is probably an animation resource 1151 animation = AnimationUtils.loadAnimation(mHost.getContext(), nextAnim); 1152 if (animation != null) { 1153 return new AnimationOrAnimator(animation); 1154 } 1155 } 1156 } 1157 } 1158 1159 if (transit == 0) { 1160 return null; 1161 } 1162 1163 int styleIndex = transitToStyleIndex(transit, enter); 1164 if (styleIndex < 0) { 1165 return null; 1166 } 1167 1168 switch (styleIndex) { 1169 case ANIM_STYLE_OPEN_ENTER: 1170 return makeOpenCloseAnimation(mHost.getContext(), 1.125f, 1.0f, 0, 1); 1171 case ANIM_STYLE_OPEN_EXIT: 1172 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, .975f, 1, 0); 1173 case ANIM_STYLE_CLOSE_ENTER: 1174 return makeOpenCloseAnimation(mHost.getContext(), .975f, 1.0f, 0, 1); 1175 case ANIM_STYLE_CLOSE_EXIT: 1176 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, 1.075f, 1, 0); 1177 case ANIM_STYLE_FADE_ENTER: 1178 return makeFadeAnimation(mHost.getContext(), 0, 1); 1179 case ANIM_STYLE_FADE_EXIT: 1180 return makeFadeAnimation(mHost.getContext(), 1, 0); 1181 } 1182 1183 // TODO: remove or fix transitionStyle -- it apparently never worked. 1184 if (transitionStyle == 0 && mHost.onHasWindowAnimations()) { 1185 transitionStyle = mHost.onGetWindowAnimations(); 1186 } 1187 if (transitionStyle == 0) { 1188 return null; 1189 } 1190 1191 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 1192 // com.android.internal.R.styleable.FragmentAnimation); 1193 //int anim = attrs.getResourceId(styleIndex, 0); 1194 //attrs.recycle(); 1195 1196 //if (anim == 0) { 1197 // return null; 1198 //} 1199 1200 //return AnimatorInflater.loadAnimator(mActivity, anim); 1201 return null; 1202 } 1203 1204 public void performPendingDeferredStart(Fragment f) { 1205 if (f.mDeferStart) { 1206 if (mExecutingActions) { 1207 // Wait until we're done executing our pending transactions 1208 mHavePendingDeferredStart = true; 1209 return; 1210 } 1211 f.mDeferStart = false; 1212 moveToState(f, mCurState, 0, 0, false); 1213 } 1214 } 1215 1216 /** 1217 * Sets the to be animated view on hardware layer during the animation. Note 1218 * that calling this will replace any existing animation listener on the animation 1219 * with a new one, as animations do not support more than one listeners. Therefore, 1220 * animations that already have listeners should do the layer change operations 1221 * in their existing listeners, rather than calling this function. 1222 */ 1223 private static void setHWLayerAnimListenerIfAlpha(final View v, AnimationOrAnimator anim) { 1224 if (v == null || anim == null) { 1225 return; 1226 } 1227 if (shouldRunOnHWLayer(v, anim)) { 1228 if (anim.animator != null) { 1229 anim.animator.addListener(new AnimatorOnHWLayerIfNeededListener(v)); 1230 } else { 1231 AnimationListener originalListener = getAnimationListener(anim.animation); 1232 // If there's already a listener set on the animation, we need wrap the new listener 1233 // around the existing listener, so that they will both get animation listener 1234 // callbacks. 1235 v.setLayerType(View.LAYER_TYPE_HARDWARE, null); 1236 anim.animation.setAnimationListener(new AnimateOnHWLayerIfNeededListener(v, 1237 originalListener)); 1238 } 1239 } 1240 } 1241 1242 /** 1243 * Returns an existing AnimationListener on an Animation or {@code null} if none exists. 1244 */ 1245 private static AnimationListener getAnimationListener(Animation animation) { 1246 AnimationListener originalListener = null; 1247 try { 1248 if (sAnimationListenerField == null) { 1249 sAnimationListenerField = Animation.class.getDeclaredField("mListener"); 1250 sAnimationListenerField.setAccessible(true); 1251 } 1252 originalListener = (AnimationListener) sAnimationListenerField.get(animation); 1253 } catch (NoSuchFieldException e) { 1254 Log.e(TAG, "No field with the name mListener is found in Animation class", e); 1255 } catch (IllegalAccessException e) { 1256 Log.e(TAG, "Cannot access Animation's mListener field", e); 1257 } 1258 return originalListener; 1259 } 1260 1261 boolean isStateAtLeast(int state) { 1262 return mCurState >= state; 1263 } 1264 1265 @SuppressWarnings("ReferenceEquality") 1266 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 1267 boolean keepActive) { 1268 // Fragments that are not currently added will sit in the onCreate() state. 1269 if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) { 1270 newState = Fragment.CREATED; 1271 } 1272 if (f.mRemoving && newState > f.mState) { 1273 if (f.mState == Fragment.INITIALIZING && f.isInBackStack()) { 1274 // Allow the fragment to be created so that it can be saved later. 1275 newState = Fragment.CREATED; 1276 } else { 1277 // While removing a fragment, we can't change it to a higher state. 1278 newState = f.mState; 1279 } 1280 } 1281 // Defer start if requested; don't allow it to move to STARTED or higher 1282 // if it's not already started. 1283 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 1284 newState = Fragment.STOPPED; 1285 } 1286 if (f.mState <= newState) { 1287 // For fragments that are created from a layout, when restoring from 1288 // state we don't want to allow them to be created until they are 1289 // being reloaded from the layout. 1290 if (f.mFromLayout && !f.mInLayout) { 1291 return; 1292 } 1293 if (f.getAnimatingAway() != null || f.getAnimator() != null) { 1294 // The fragment is currently being animated... but! Now we 1295 // want to move our state back up. Give up on waiting for the 1296 // animation, move to whatever the final state should be once 1297 // the animation is done, and then we can proceed from there. 1298 f.setAnimatingAway(null); 1299 f.setAnimator(null); 1300 moveToState(f, f.getStateAfterAnimating(), 0, 0, true); 1301 } 1302 switch (f.mState) { 1303 case Fragment.INITIALIZING: 1304 if (newState > Fragment.INITIALIZING) { 1305 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 1306 if (f.mSavedFragmentState != null) { 1307 f.mSavedFragmentState.setClassLoader(mHost.getContext() 1308 .getClassLoader()); 1309 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 1310 FragmentManagerImpl.VIEW_STATE_TAG); 1311 f.mTarget = getFragment(f.mSavedFragmentState, 1312 FragmentManagerImpl.TARGET_STATE_TAG); 1313 if (f.mTarget != null) { 1314 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 1315 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 1316 } 1317 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 1318 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 1319 if (!f.mUserVisibleHint) { 1320 f.mDeferStart = true; 1321 if (newState > Fragment.STOPPED) { 1322 newState = Fragment.STOPPED; 1323 } 1324 } 1325 } 1326 1327 f.mHost = mHost; 1328 f.mParentFragment = mParent; 1329 f.mFragmentManager = mParent != null 1330 ? mParent.mChildFragmentManager : mHost.getFragmentManagerImpl(); 1331 1332 // If we have a target fragment, push it along to at least CREATED 1333 // so that this one can rely on it as an initialized dependency. 1334 if (f.mTarget != null) { 1335 if (mActive.get(f.mTarget.mIndex) != f.mTarget) { 1336 throw new IllegalStateException("Fragment " + f 1337 + " declared target fragment " + f.mTarget 1338 + " that does not belong to this FragmentManager!"); 1339 } 1340 if (f.mTarget.mState < Fragment.CREATED) { 1341 moveToState(f.mTarget, Fragment.CREATED, 0, 0, true); 1342 } 1343 } 1344 1345 dispatchOnFragmentPreAttached(f, mHost.getContext(), false); 1346 f.mCalled = false; 1347 f.onAttach(mHost.getContext()); 1348 if (!f.mCalled) { 1349 throw new SuperNotCalledException("Fragment " + f 1350 + " did not call through to super.onAttach()"); 1351 } 1352 if (f.mParentFragment == null) { 1353 mHost.onAttachFragment(f); 1354 } else { 1355 f.mParentFragment.onAttachFragment(f); 1356 } 1357 dispatchOnFragmentAttached(f, mHost.getContext(), false); 1358 1359 if (!f.mRetaining) { 1360 f.performCreate(f.mSavedFragmentState); 1361 dispatchOnFragmentCreated(f, f.mSavedFragmentState, false); 1362 } else { 1363 f.restoreChildFragmentState(f.mSavedFragmentState); 1364 f.mState = Fragment.CREATED; 1365 } 1366 f.mRetaining = false; 1367 } 1368 // fall through 1369 case Fragment.CREATED: 1370 // This is outside the if statement below on purpose; we want this to run 1371 // even if we do a moveToState from CREATED => *, CREATED => CREATED, and 1372 // * => CREATED as part of the case fallthrough above. 1373 ensureInflatedFragmentView(f); 1374 1375 if (newState > Fragment.CREATED) { 1376 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 1377 if (!f.mFromLayout) { 1378 ViewGroup container = null; 1379 if (f.mContainerId != 0) { 1380 if (f.mContainerId == View.NO_ID) { 1381 throwException(new IllegalArgumentException( 1382 "Cannot create fragment " 1383 + f 1384 + " for a container view with no id")); 1385 } 1386 container = (ViewGroup) mContainer.onFindViewById(f.mContainerId); 1387 if (container == null && !f.mRestored) { 1388 String resName; 1389 try { 1390 resName = f.getResources().getResourceName(f.mContainerId); 1391 } catch (NotFoundException e) { 1392 resName = "unknown"; 1393 } 1394 throwException(new IllegalArgumentException( 1395 "No view found for id 0x" 1396 + Integer.toHexString(f.mContainerId) + " (" 1397 + resName 1398 + ") for fragment " + f)); 1399 } 1400 } 1401 f.mContainer = container; 1402 f.mView = f.performCreateView(f.performGetLayoutInflater( 1403 f.mSavedFragmentState), container, f.mSavedFragmentState); 1404 if (f.mView != null) { 1405 f.mInnerView = f.mView; 1406 f.mView.setSaveFromParentEnabled(false); 1407 if (container != null) { 1408 container.addView(f.mView); 1409 } 1410 if (f.mHidden) { 1411 f.mView.setVisibility(View.GONE); 1412 } 1413 f.onViewCreated(f.mView, f.mSavedFragmentState); 1414 dispatchOnFragmentViewCreated(f, f.mView, f.mSavedFragmentState, 1415 false); 1416 // Only animate the view if it is visible. This is done after 1417 // dispatchOnFragmentViewCreated in case visibility is changed 1418 f.mIsNewlyAdded = (f.mView.getVisibility() == View.VISIBLE) 1419 && f.mContainer != null; 1420 } else { 1421 f.mInnerView = null; 1422 } 1423 } 1424 1425 f.performActivityCreated(f.mSavedFragmentState); 1426 dispatchOnFragmentActivityCreated(f, f.mSavedFragmentState, false); 1427 if (f.mView != null) { 1428 f.restoreViewState(f.mSavedFragmentState); 1429 } 1430 f.mSavedFragmentState = null; 1431 } 1432 // fall through 1433 case Fragment.ACTIVITY_CREATED: 1434 if (newState > Fragment.ACTIVITY_CREATED) { 1435 f.mState = Fragment.STOPPED; 1436 } 1437 // fall through 1438 case Fragment.STOPPED: 1439 if (newState > Fragment.STOPPED) { 1440 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 1441 f.performStart(); 1442 dispatchOnFragmentStarted(f, false); 1443 } 1444 // fall through 1445 case Fragment.STARTED: 1446 if (newState > Fragment.STARTED) { 1447 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 1448 f.performResume(); 1449 dispatchOnFragmentResumed(f, false); 1450 f.mSavedFragmentState = null; 1451 f.mSavedViewState = null; 1452 } 1453 } 1454 } else if (f.mState > newState) { 1455 switch (f.mState) { 1456 case Fragment.RESUMED: 1457 if (newState < Fragment.RESUMED) { 1458 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 1459 f.performPause(); 1460 dispatchOnFragmentPaused(f, false); 1461 } 1462 // fall through 1463 case Fragment.STARTED: 1464 if (newState < Fragment.STARTED) { 1465 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 1466 f.performStop(); 1467 dispatchOnFragmentStopped(f, false); 1468 } 1469 // fall through 1470 case Fragment.STOPPED: 1471 if (newState < Fragment.STOPPED) { 1472 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 1473 f.performReallyStop(); 1474 } 1475 // fall through 1476 case Fragment.ACTIVITY_CREATED: 1477 if (newState < Fragment.ACTIVITY_CREATED) { 1478 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 1479 if (f.mView != null) { 1480 // Need to save the current view state if not 1481 // done already. 1482 if (mHost.onShouldSaveFragmentState(f) && f.mSavedViewState == null) { 1483 saveFragmentViewState(f); 1484 } 1485 } 1486 f.performDestroyView(); 1487 dispatchOnFragmentViewDestroyed(f, false); 1488 if (f.mView != null && f.mContainer != null) { 1489 // Stop any current animations: 1490 f.mView.clearAnimation(); 1491 f.mContainer.endViewTransition(f.mView); 1492 AnimationOrAnimator anim = null; 1493 if (mCurState > Fragment.INITIALIZING && !mDestroyed 1494 && f.mView.getVisibility() == View.VISIBLE 1495 && f.mPostponedAlpha >= 0) { 1496 anim = loadAnimation(f, transit, false, 1497 transitionStyle); 1498 } 1499 f.mPostponedAlpha = 0; 1500 if (anim != null) { 1501 animateRemoveFragment(f, anim, newState); 1502 } 1503 f.mContainer.removeView(f.mView); 1504 } 1505 f.mContainer = null; 1506 f.mView = null; 1507 f.mInnerView = null; 1508 f.mInLayout = false; 1509 } 1510 // fall through 1511 case Fragment.CREATED: 1512 if (newState < Fragment.CREATED) { 1513 if (mDestroyed) { 1514 // The fragment's containing activity is 1515 // being destroyed, but this fragment is 1516 // currently animating away. Stop the 1517 // animation right now -- it is not needed, 1518 // and we can't wait any more on destroying 1519 // the fragment. 1520 if (f.getAnimatingAway() != null) { 1521 View v = f.getAnimatingAway(); 1522 f.setAnimatingAway(null); 1523 v.clearAnimation(); 1524 } else if (f.getAnimator() != null) { 1525 Animator animator = f.getAnimator(); 1526 f.setAnimator(null); 1527 animator.cancel(); 1528 } 1529 } 1530 if (f.getAnimatingAway() != null || f.getAnimator() != null) { 1531 // We are waiting for the fragment's view to finish 1532 // animating away. Just make a note of the state 1533 // the fragment now should move to once the animation 1534 // is done. 1535 f.setStateAfterAnimating(newState); 1536 newState = Fragment.CREATED; 1537 } else { 1538 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1539 if (!f.mRetaining) { 1540 f.performDestroy(); 1541 dispatchOnFragmentDestroyed(f, false); 1542 } else { 1543 f.mState = Fragment.INITIALIZING; 1544 } 1545 1546 f.performDetach(); 1547 dispatchOnFragmentDetached(f, false); 1548 if (!keepActive) { 1549 if (!f.mRetaining) { 1550 makeInactive(f); 1551 } else { 1552 f.mHost = null; 1553 f.mParentFragment = null; 1554 f.mFragmentManager = null; 1555 } 1556 } 1557 } 1558 } 1559 } 1560 } 1561 1562 if (f.mState != newState) { 1563 Log.w(TAG, "moveToState: Fragment state for " + f + " not updated inline; " 1564 + "expected state " + newState + " found " + f.mState); 1565 f.mState = newState; 1566 } 1567 } 1568 1569 /** 1570 * Animates the removal of a fragment with the given animator or animation. After animating, 1571 * the fragment's view will be removed from the hierarchy. 1572 * 1573 * @param fragment The fragment to animate out 1574 * @param anim The animator or animation to run on the fragment's view 1575 * @param newState The final state after animating. 1576 */ 1577 private void animateRemoveFragment(@NonNull final Fragment fragment, 1578 @NonNull AnimationOrAnimator anim, final int newState) { 1579 final View viewToAnimate = fragment.mView; 1580 fragment.setStateAfterAnimating(newState); 1581 if (anim.animation != null) { 1582 Animation animation = anim.animation; 1583 fragment.setAnimatingAway(fragment.mView); 1584 AnimationListener listener = getAnimationListener(animation); 1585 animation.setAnimationListener(new AnimationListenerWrapper(listener) { 1586 @Override 1587 public void onAnimationEnd(Animation animation) { 1588 super.onAnimationEnd(animation); 1589 if (fragment.getAnimatingAway() != null) { 1590 fragment.setAnimatingAway(null); 1591 moveToState(fragment, fragment.getStateAfterAnimating(), 0, 0, false); 1592 } 1593 } 1594 }); 1595 setHWLayerAnimListenerIfAlpha(viewToAnimate, anim); 1596 fragment.mView.startAnimation(animation); 1597 } else { 1598 final Animator animator = anim.animator; 1599 fragment.setAnimator(anim.animator); 1600 final ViewGroup container = fragment.mContainer; 1601 if (container != null) { 1602 container.startViewTransition(viewToAnimate); 1603 } 1604 animator.addListener(new AnimatorListenerAdapter() { 1605 @Override 1606 public void onAnimationEnd(Animator anim) { 1607 if (container != null) { 1608 container.endViewTransition(viewToAnimate); 1609 } 1610 if (fragment.getAnimator() != null) { 1611 fragment.setAnimator(null); 1612 moveToState(fragment, fragment.getStateAfterAnimating(), 0, 0, false); 1613 } 1614 } 1615 }); 1616 animator.setTarget(fragment.mView); 1617 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1618 animator.start(); 1619 } 1620 } 1621 1622 void moveToState(Fragment f) { 1623 moveToState(f, mCurState, 0, 0, false); 1624 } 1625 1626 void ensureInflatedFragmentView(Fragment f) { 1627 if (f.mFromLayout && !f.mPerformedCreateView) { 1628 f.mView = f.performCreateView(f.performGetLayoutInflater( 1629 f.mSavedFragmentState), null, f.mSavedFragmentState); 1630 if (f.mView != null) { 1631 f.mInnerView = f.mView; 1632 f.mView.setSaveFromParentEnabled(false); 1633 if (f.mHidden) f.mView.setVisibility(View.GONE); 1634 f.onViewCreated(f.mView, f.mSavedFragmentState); 1635 dispatchOnFragmentViewCreated(f, f.mView, f.mSavedFragmentState, false); 1636 } else { 1637 f.mInnerView = null; 1638 } 1639 } 1640 } 1641 1642 /** 1643 * Fragments that have been shown or hidden don't have their visibility changed or 1644 * animations run during the {@link #showFragment(Fragment)} or {@link #hideFragment(Fragment)} 1645 * calls. After fragments are brought to their final state in 1646 * {@link #moveFragmentToExpectedState(Fragment)} the fragments that have been shown or 1647 * hidden must have their visibility changed and their animations started here. 1648 * 1649 * @param fragment The fragment with mHiddenChanged = true that should change its View's 1650 * visibility and start the show or hide animation. 1651 */ 1652 void completeShowHideFragment(final Fragment fragment) { 1653 if (fragment.mView != null) { 1654 AnimationOrAnimator anim = loadAnimation(fragment, fragment.getNextTransition(), 1655 !fragment.mHidden, fragment.getNextTransitionStyle()); 1656 if (anim != null && anim.animator != null) { 1657 anim.animator.setTarget(fragment.mView); 1658 if (fragment.mHidden) { 1659 if (fragment.isHideReplaced()) { 1660 fragment.setHideReplaced(false); 1661 } else { 1662 final ViewGroup container = fragment.mContainer; 1663 final View animatingView = fragment.mView; 1664 container.startViewTransition(animatingView); 1665 // Delay the actual hide operation until the animation finishes, 1666 // otherwise the fragment will just immediately disappear 1667 anim.animator.addListener(new AnimatorListenerAdapter() { 1668 @Override 1669 public void onAnimationEnd(Animator animation) { 1670 container.endViewTransition(animatingView); 1671 animation.removeListener(this); 1672 if (fragment.mView != null) { 1673 fragment.mView.setVisibility(View.GONE); 1674 } 1675 } 1676 }); 1677 } 1678 } else { 1679 fragment.mView.setVisibility(View.VISIBLE); 1680 } 1681 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1682 anim.animator.start(); 1683 } else { 1684 if (anim != null) { 1685 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1686 fragment.mView.startAnimation(anim.animation); 1687 anim.animation.start(); 1688 } 1689 final int visibility = fragment.mHidden && !fragment.isHideReplaced() 1690 ? View.GONE 1691 : View.VISIBLE; 1692 fragment.mView.setVisibility(visibility); 1693 if (fragment.isHideReplaced()) { 1694 fragment.setHideReplaced(false); 1695 } 1696 } 1697 } 1698 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1699 mNeedMenuInvalidate = true; 1700 } 1701 fragment.mHiddenChanged = false; 1702 fragment.onHiddenChanged(fragment.mHidden); 1703 } 1704 1705 /** 1706 * Moves a fragment to its expected final state or the fragment manager's state, depending 1707 * on whether the fragment manager's state is raised properly. 1708 * 1709 * @param f The fragment to change. 1710 */ 1711 void moveFragmentToExpectedState(Fragment f) { 1712 if (f == null) { 1713 return; 1714 } 1715 int nextState = mCurState; 1716 if (f.mRemoving) { 1717 if (f.isInBackStack()) { 1718 nextState = Math.min(nextState, Fragment.CREATED); 1719 } else { 1720 nextState = Math.min(nextState, Fragment.INITIALIZING); 1721 } 1722 } 1723 moveToState(f, nextState, f.getNextTransition(), f.getNextTransitionStyle(), false); 1724 1725 if (f.mView != null) { 1726 // Move the view if it is out of order 1727 Fragment underFragment = findFragmentUnder(f); 1728 if (underFragment != null) { 1729 final View underView = underFragment.mView; 1730 // make sure this fragment is in the right order. 1731 final ViewGroup container = f.mContainer; 1732 int underIndex = container.indexOfChild(underView); 1733 int viewIndex = container.indexOfChild(f.mView); 1734 if (viewIndex < underIndex) { 1735 container.removeViewAt(viewIndex); 1736 container.addView(f.mView, underIndex); 1737 } 1738 } 1739 if (f.mIsNewlyAdded && f.mContainer != null) { 1740 // Make it visible and run the animations 1741 if (f.mPostponedAlpha > 0f) { 1742 f.mView.setAlpha(f.mPostponedAlpha); 1743 } 1744 f.mPostponedAlpha = 0f; 1745 f.mIsNewlyAdded = false; 1746 // run animations: 1747 AnimationOrAnimator anim = loadAnimation(f, f.getNextTransition(), true, 1748 f.getNextTransitionStyle()); 1749 if (anim != null) { 1750 setHWLayerAnimListenerIfAlpha(f.mView, anim); 1751 if (anim.animation != null) { 1752 f.mView.startAnimation(anim.animation); 1753 } else { 1754 anim.animator.setTarget(f.mView); 1755 anim.animator.start(); 1756 } 1757 } 1758 } 1759 } 1760 if (f.mHiddenChanged) { 1761 completeShowHideFragment(f); 1762 } 1763 } 1764 1765 /** 1766 * Changes the state of the fragment manager to {@code newState}. If the fragment manager 1767 * changes state or {@code always} is {@code true}, any fragments within it have their 1768 * states updated as well. 1769 * 1770 * @param newState The new state for the fragment manager 1771 * @param always If {@code true}, all fragments update their state, even 1772 * if {@code newState} matches the current fragment manager's state. 1773 */ 1774 void moveToState(int newState, boolean always) { 1775 if (mHost == null && newState != Fragment.INITIALIZING) { 1776 throw new IllegalStateException("No activity"); 1777 } 1778 1779 if (!always && newState == mCurState) { 1780 return; 1781 } 1782 1783 mCurState = newState; 1784 1785 if (mActive != null) { 1786 boolean loadersRunning = false; 1787 1788 // Must add them in the proper order. mActive fragments may be out of order 1789 if (mAdded != null) { 1790 final int numAdded = mAdded.size(); 1791 for (int i = 0; i < numAdded; i++) { 1792 Fragment f = mAdded.get(i); 1793 moveFragmentToExpectedState(f); 1794 if (f.mLoaderManager != null) { 1795 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1796 } 1797 } 1798 } 1799 1800 // Now iterate through all active fragments. These will include those that are removed 1801 // and detached. 1802 final int numActive = mActive.size(); 1803 for (int i = 0; i < numActive; i++) { 1804 Fragment f = mActive.valueAt(i); 1805 if (f != null && (f.mRemoving || f.mDetached) && !f.mIsNewlyAdded) { 1806 moveFragmentToExpectedState(f); 1807 if (f.mLoaderManager != null) { 1808 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1809 } 1810 } 1811 } 1812 1813 if (!loadersRunning) { 1814 startPendingDeferredFragments(); 1815 } 1816 1817 if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) { 1818 mHost.onSupportInvalidateOptionsMenu(); 1819 mNeedMenuInvalidate = false; 1820 } 1821 } 1822 } 1823 1824 void startPendingDeferredFragments() { 1825 if (mActive == null) return; 1826 1827 for (int i=0; i<mActive.size(); i++) { 1828 Fragment f = mActive.valueAt(i); 1829 if (f != null) { 1830 performPendingDeferredStart(f); 1831 } 1832 } 1833 } 1834 1835 void makeActive(Fragment f) { 1836 if (f.mIndex >= 0) { 1837 return; 1838 } 1839 1840 f.setIndex(mNextFragmentIndex++, mParent); 1841 if (mActive == null) { 1842 mActive = new SparseArray<>(); 1843 } 1844 mActive.put(f.mIndex, f); 1845 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1846 } 1847 1848 void makeInactive(Fragment f) { 1849 if (f.mIndex < 0) { 1850 return; 1851 } 1852 1853 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1854 // Don't remove yet. That happens in burpActive(). This prevents 1855 // concurrent modification while iterating over mActive 1856 mActive.put(f.mIndex, null); 1857 1858 mHost.inactivateFragment(f.mWho); 1859 f.initState(); 1860 } 1861 1862 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1863 if (mAdded == null) { 1864 mAdded = new ArrayList<Fragment>(); 1865 } 1866 if (DEBUG) Log.v(TAG, "add: " + fragment); 1867 makeActive(fragment); 1868 if (!fragment.mDetached) { 1869 if (mAdded.contains(fragment)) { 1870 throw new IllegalStateException("Fragment already added: " + fragment); 1871 } 1872 synchronized (mAdded) { 1873 mAdded.add(fragment); 1874 } 1875 fragment.mAdded = true; 1876 fragment.mRemoving = false; 1877 if (fragment.mView == null) { 1878 fragment.mHiddenChanged = false; 1879 } 1880 if (fragment.mHasMenu && fragment.mMenuVisible) { 1881 mNeedMenuInvalidate = true; 1882 } 1883 if (moveToStateNow) { 1884 moveToState(fragment); 1885 } 1886 } 1887 } 1888 1889 public void removeFragment(Fragment fragment) { 1890 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1891 final boolean inactive = !fragment.isInBackStack(); 1892 if (!fragment.mDetached || inactive) { 1893 if (mAdded != null) { 1894 synchronized (mAdded) { 1895 mAdded.remove(fragment); 1896 } 1897 } 1898 if (fragment.mHasMenu && fragment.mMenuVisible) { 1899 mNeedMenuInvalidate = true; 1900 } 1901 fragment.mAdded = false; 1902 fragment.mRemoving = true; 1903 } 1904 } 1905 1906 /** 1907 * Marks a fragment as hidden to be later animated in with 1908 * {@link #completeShowHideFragment(Fragment)}. 1909 * 1910 * @param fragment The fragment to be shown. 1911 */ 1912 public void hideFragment(Fragment fragment) { 1913 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1914 if (!fragment.mHidden) { 1915 fragment.mHidden = true; 1916 // Toggle hidden changed so that if a fragment goes through show/hide/show 1917 // it doesn't go through the animation. 1918 fragment.mHiddenChanged = !fragment.mHiddenChanged; 1919 } 1920 } 1921 1922 /** 1923 * Marks a fragment as shown to be later animated in with 1924 * {@link #completeShowHideFragment(Fragment)}. 1925 * 1926 * @param fragment The fragment to be shown. 1927 */ 1928 public void showFragment(Fragment fragment) { 1929 if (DEBUG) Log.v(TAG, "show: " + fragment); 1930 if (fragment.mHidden) { 1931 fragment.mHidden = false; 1932 // Toggle hidden changed so that if a fragment goes through show/hide/show 1933 // it doesn't go through the animation. 1934 fragment.mHiddenChanged = !fragment.mHiddenChanged; 1935 } 1936 } 1937 1938 public void detachFragment(Fragment fragment) { 1939 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1940 if (!fragment.mDetached) { 1941 fragment.mDetached = true; 1942 if (fragment.mAdded) { 1943 // We are not already in back stack, so need to remove the fragment. 1944 if (mAdded != null) { 1945 if (DEBUG) Log.v(TAG, "remove from detach: " + fragment); 1946 synchronized (mAdded) { 1947 mAdded.remove(fragment); 1948 } 1949 } 1950 if (fragment.mHasMenu && fragment.mMenuVisible) { 1951 mNeedMenuInvalidate = true; 1952 } 1953 fragment.mAdded = false; 1954 } 1955 } 1956 } 1957 1958 public void attachFragment(Fragment fragment) { 1959 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1960 if (fragment.mDetached) { 1961 fragment.mDetached = false; 1962 if (!fragment.mAdded) { 1963 if (mAdded == null) { 1964 mAdded = new ArrayList<Fragment>(); 1965 } 1966 if (mAdded.contains(fragment)) { 1967 throw new IllegalStateException("Fragment already added: " + fragment); 1968 } 1969 if (DEBUG) Log.v(TAG, "add from attach: " + fragment); 1970 synchronized (mAdded) { 1971 mAdded.add(fragment); 1972 } 1973 fragment.mAdded = true; 1974 if (fragment.mHasMenu && fragment.mMenuVisible) { 1975 mNeedMenuInvalidate = true; 1976 } 1977 } 1978 } 1979 } 1980 1981 @Override 1982 public Fragment findFragmentById(int id) { 1983 if (mAdded != null) { 1984 // First look through added fragments. 1985 for (int i=mAdded.size()-1; i>=0; i--) { 1986 Fragment f = mAdded.get(i); 1987 if (f != null && f.mFragmentId == id) { 1988 return f; 1989 } 1990 } 1991 } 1992 if (mActive != null) { 1993 // Now for any known fragment. 1994 for (int i=mActive.size()-1; i>=0; i--) { 1995 Fragment f = mActive.valueAt(i); 1996 if (f != null && f.mFragmentId == id) { 1997 return f; 1998 } 1999 } 2000 } 2001 return null; 2002 } 2003 2004 @Override 2005 public Fragment findFragmentByTag(String tag) { 2006 if (mAdded != null && tag != null) { 2007 // First look through added fragments. 2008 for (int i=mAdded.size()-1; i>=0; i--) { 2009 Fragment f = mAdded.get(i); 2010 if (f != null && tag.equals(f.mTag)) { 2011 return f; 2012 } 2013 } 2014 } 2015 if (mActive != null && tag != null) { 2016 // Now for any known fragment. 2017 for (int i=mActive.size()-1; i>=0; i--) { 2018 Fragment f = mActive.valueAt(i); 2019 if (f != null && tag.equals(f.mTag)) { 2020 return f; 2021 } 2022 } 2023 } 2024 return null; 2025 } 2026 2027 public Fragment findFragmentByWho(String who) { 2028 if (mActive != null && who != null) { 2029 for (int i=mActive.size()-1; i>=0; i--) { 2030 Fragment f = mActive.valueAt(i); 2031 if (f != null && (f=f.findFragmentByWho(who)) != null) { 2032 return f; 2033 } 2034 } 2035 } 2036 return null; 2037 } 2038 2039 private void checkStateLoss() { 2040 if (mStateSaved) { 2041 throw new IllegalStateException( 2042 "Can not perform this action after onSaveInstanceState"); 2043 } 2044 if (mNoTransactionsBecause != null) { 2045 throw new IllegalStateException( 2046 "Can not perform this action inside of " + mNoTransactionsBecause); 2047 } 2048 } 2049 2050 @Override 2051 public boolean isStateSaved() { 2052 return mStateSaved; 2053 } 2054 2055 /** 2056 * Adds an action to the queue of pending actions. 2057 * 2058 * @param action the action to add 2059 * @param allowStateLoss whether to allow loss of state information 2060 * @throws IllegalStateException if the activity has been destroyed 2061 */ 2062 public void enqueueAction(OpGenerator action, boolean allowStateLoss) { 2063 if (!allowStateLoss) { 2064 checkStateLoss(); 2065 } 2066 synchronized (this) { 2067 if (mDestroyed || mHost == null) { 2068 if (allowStateLoss) { 2069 // This FragmentManager isn't attached, so drop the entire transaction. 2070 return; 2071 } 2072 throw new IllegalStateException("Activity has been destroyed"); 2073 } 2074 if (mPendingActions == null) { 2075 mPendingActions = new ArrayList<>(); 2076 } 2077 mPendingActions.add(action); 2078 scheduleCommit(); 2079 } 2080 } 2081 2082 /** 2083 * Schedules the execution when one hasn't been scheduled already. This should happen 2084 * the first time {@link #enqueueAction(OpGenerator, boolean)} is called or when 2085 * a postponed transaction has been started with 2086 * {@link Fragment#startPostponedEnterTransition()} 2087 */ 2088 private void scheduleCommit() { 2089 synchronized (this) { 2090 boolean postponeReady = 2091 mPostponedTransactions != null && !mPostponedTransactions.isEmpty(); 2092 boolean pendingReady = mPendingActions != null && mPendingActions.size() == 1; 2093 if (postponeReady || pendingReady) { 2094 mHost.getHandler().removeCallbacks(mExecCommit); 2095 mHost.getHandler().post(mExecCommit); 2096 } 2097 } 2098 } 2099 2100 public int allocBackStackIndex(BackStackRecord bse) { 2101 synchronized (this) { 2102 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 2103 if (mBackStackIndices == null) { 2104 mBackStackIndices = new ArrayList<BackStackRecord>(); 2105 } 2106 int index = mBackStackIndices.size(); 2107 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 2108 mBackStackIndices.add(bse); 2109 return index; 2110 2111 } else { 2112 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 2113 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 2114 mBackStackIndices.set(index, bse); 2115 return index; 2116 } 2117 } 2118 } 2119 2120 public void setBackStackIndex(int index, BackStackRecord bse) { 2121 synchronized (this) { 2122 if (mBackStackIndices == null) { 2123 mBackStackIndices = new ArrayList<BackStackRecord>(); 2124 } 2125 int N = mBackStackIndices.size(); 2126 if (index < N) { 2127 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 2128 mBackStackIndices.set(index, bse); 2129 } else { 2130 while (N < index) { 2131 mBackStackIndices.add(null); 2132 if (mAvailBackStackIndices == null) { 2133 mAvailBackStackIndices = new ArrayList<Integer>(); 2134 } 2135 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 2136 mAvailBackStackIndices.add(N); 2137 N++; 2138 } 2139 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 2140 mBackStackIndices.add(bse); 2141 } 2142 } 2143 } 2144 2145 public void freeBackStackIndex(int index) { 2146 synchronized (this) { 2147 mBackStackIndices.set(index, null); 2148 if (mAvailBackStackIndices == null) { 2149 mAvailBackStackIndices = new ArrayList<Integer>(); 2150 } 2151 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 2152 mAvailBackStackIndices.add(index); 2153 } 2154 } 2155 2156 /** 2157 * Broken out from exec*, this prepares for gathering and executing operations. 2158 * 2159 * @param allowStateLoss true if state loss should be ignored or false if it should be 2160 * checked. 2161 */ 2162 private void ensureExecReady(boolean allowStateLoss) { 2163 if (mExecutingActions) { 2164 throw new IllegalStateException("FragmentManager is already executing transactions"); 2165 } 2166 2167 if (Looper.myLooper() != mHost.getHandler().getLooper()) { 2168 throw new IllegalStateException("Must be called from main thread of fragment host"); 2169 } 2170 2171 if (!allowStateLoss) { 2172 checkStateLoss(); 2173 } 2174 2175 if (mTmpRecords == null) { 2176 mTmpRecords = new ArrayList<>(); 2177 mTmpIsPop = new ArrayList<>(); 2178 } 2179 mExecutingActions = true; 2180 try { 2181 executePostponedTransaction(null, null); 2182 } finally { 2183 mExecutingActions = false; 2184 } 2185 } 2186 2187 public void execSingleAction(OpGenerator action, boolean allowStateLoss) { 2188 if (allowStateLoss && (mHost == null || mDestroyed)) { 2189 // This FragmentManager isn't attached, so drop the entire transaction. 2190 return; 2191 } 2192 ensureExecReady(allowStateLoss); 2193 if (action.generateOps(mTmpRecords, mTmpIsPop)) { 2194 mExecutingActions = true; 2195 try { 2196 removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop); 2197 } finally { 2198 cleanupExec(); 2199 } 2200 } 2201 2202 doPendingDeferredStart(); 2203 burpActive(); 2204 } 2205 2206 /** 2207 * Broken out of exec*, this cleans up the mExecutingActions and the temporary structures 2208 * used in executing operations. 2209 */ 2210 private void cleanupExec() { 2211 mExecutingActions = false; 2212 mTmpIsPop.clear(); 2213 mTmpRecords.clear(); 2214 } 2215 2216 /** 2217 * Only call from main thread! 2218 */ 2219 public boolean execPendingActions() { 2220 ensureExecReady(true); 2221 2222 boolean didSomething = false; 2223 while (generateOpsForPendingActions(mTmpRecords, mTmpIsPop)) { 2224 mExecutingActions = true; 2225 try { 2226 removeRedundantOperationsAndExecute(mTmpRecords, mTmpIsPop); 2227 } finally { 2228 cleanupExec(); 2229 } 2230 didSomething = true; 2231 } 2232 2233 doPendingDeferredStart(); 2234 burpActive(); 2235 2236 return didSomething; 2237 } 2238 2239 /** 2240 * Complete the execution of transactions that have previously been postponed, but are 2241 * now ready. 2242 */ 2243 private void executePostponedTransaction(ArrayList<BackStackRecord> records, 2244 ArrayList<Boolean> isRecordPop) { 2245 int numPostponed = mPostponedTransactions == null ? 0 : mPostponedTransactions.size(); 2246 for (int i = 0; i < numPostponed; i++) { 2247 StartEnterTransitionListener listener = mPostponedTransactions.get(i); 2248 if (records != null && !listener.mIsBack) { 2249 int index = records.indexOf(listener.mRecord); 2250 if (index != -1 && isRecordPop.get(index)) { 2251 listener.cancelTransaction(); 2252 continue; 2253 } 2254 } 2255 if (listener.isReady() || (records != null 2256 && listener.mRecord.interactsWith(records, 0, records.size()))) { 2257 mPostponedTransactions.remove(i); 2258 i--; 2259 numPostponed--; 2260 int index; 2261 if (records != null && !listener.mIsBack 2262 && (index = records.indexOf(listener.mRecord)) != -1 2263 && isRecordPop.get(index)) { 2264 // This is popping a postponed transaction 2265 listener.cancelTransaction(); 2266 } else { 2267 listener.completeTransaction(); 2268 } 2269 } 2270 } 2271 } 2272 2273 /** 2274 * Remove redundant BackStackRecord operations and executes them. This method merges operations 2275 * of proximate records that allow reordering. See 2276 * {@link FragmentTransaction#setReorderingAllowed(boolean)}. 2277 * <p> 2278 * For example, a transaction that adds to the back stack and then another that pops that 2279 * back stack record will be optimized to remove the unnecessary operation. 2280 * <p> 2281 * Likewise, two transactions committed that are executed at the same time will be optimized 2282 * to remove the redundant operations as well as two pop operations executed together. 2283 * 2284 * @param records The records pending execution 2285 * @param isRecordPop The direction that these records are being run. 2286 */ 2287 private void removeRedundantOperationsAndExecute(ArrayList<BackStackRecord> records, 2288 ArrayList<Boolean> isRecordPop) { 2289 if (records == null || records.isEmpty()) { 2290 return; 2291 } 2292 2293 if (isRecordPop == null || records.size() != isRecordPop.size()) { 2294 throw new IllegalStateException("Internal error with the back stack records"); 2295 } 2296 2297 // Force start of any postponed transactions that interact with scheduled transactions: 2298 executePostponedTransaction(records, isRecordPop); 2299 2300 final int numRecords = records.size(); 2301 int startIndex = 0; 2302 for (int recordNum = 0; recordNum < numRecords; recordNum++) { 2303 final boolean canReorder = records.get(recordNum).mReorderingAllowed; 2304 if (!canReorder) { 2305 // execute all previous transactions 2306 if (startIndex != recordNum) { 2307 executeOpsTogether(records, isRecordPop, startIndex, recordNum); 2308 } 2309 // execute all pop operations that don't allow reordering together or 2310 // one add operation 2311 int reorderingEnd = recordNum + 1; 2312 if (isRecordPop.get(recordNum)) { 2313 while (reorderingEnd < numRecords 2314 && isRecordPop.get(reorderingEnd) 2315 && !records.get(reorderingEnd).mReorderingAllowed) { 2316 reorderingEnd++; 2317 } 2318 } 2319 executeOpsTogether(records, isRecordPop, recordNum, reorderingEnd); 2320 startIndex = reorderingEnd; 2321 recordNum = reorderingEnd - 1; 2322 } 2323 } 2324 if (startIndex != numRecords) { 2325 executeOpsTogether(records, isRecordPop, startIndex, numRecords); 2326 } 2327 } 2328 2329 /** 2330 * Executes a subset of a list of BackStackRecords, all of which either allow reordering or 2331 * do not allow ordering. 2332 * @param records A list of BackStackRecords that are to be executed 2333 * @param isRecordPop The direction that these records are being run. 2334 * @param startIndex The index of the first record in <code>records</code> to be executed 2335 * @param endIndex One more than the final record index in <code>records</code> to executed. 2336 */ 2337 private void executeOpsTogether(ArrayList<BackStackRecord> records, 2338 ArrayList<Boolean> isRecordPop, int startIndex, int endIndex) { 2339 final boolean allowReordering = records.get(startIndex).mReorderingAllowed; 2340 boolean addToBackStack = false; 2341 if (mTmpAddedFragments == null) { 2342 mTmpAddedFragments = new ArrayList<>(); 2343 } else { 2344 mTmpAddedFragments.clear(); 2345 } 2346 if (mAdded != null) { 2347 mTmpAddedFragments.addAll(mAdded); 2348 } 2349 Fragment oldPrimaryNav = getPrimaryNavigationFragment(); 2350 for (int recordNum = startIndex; recordNum < endIndex; recordNum++) { 2351 final BackStackRecord record = records.get(recordNum); 2352 final boolean isPop = isRecordPop.get(recordNum); 2353 if (!isPop) { 2354 oldPrimaryNav = record.expandOps(mTmpAddedFragments, oldPrimaryNav); 2355 } else { 2356 oldPrimaryNav = record.trackAddedFragmentsInPop(mTmpAddedFragments, oldPrimaryNav); 2357 } 2358 addToBackStack = addToBackStack || record.mAddToBackStack; 2359 } 2360 mTmpAddedFragments.clear(); 2361 2362 if (!allowReordering) { 2363 FragmentTransition.startTransitions(this, records, isRecordPop, startIndex, endIndex, 2364 false); 2365 } 2366 executeOps(records, isRecordPop, startIndex, endIndex); 2367 2368 int postponeIndex = endIndex; 2369 if (allowReordering) { 2370 ArraySet<Fragment> addedFragments = new ArraySet<>(); 2371 addAddedFragments(addedFragments); 2372 postponeIndex = postponePostponableTransactions(records, isRecordPop, 2373 startIndex, endIndex, addedFragments); 2374 makeRemovedFragmentsInvisible(addedFragments); 2375 } 2376 2377 if (postponeIndex != startIndex && allowReordering) { 2378 // need to run something now 2379 FragmentTransition.startTransitions(this, records, isRecordPop, startIndex, 2380 postponeIndex, true); 2381 moveToState(mCurState, true); 2382 } 2383 2384 for (int recordNum = startIndex; recordNum < endIndex; recordNum++) { 2385 final BackStackRecord record = records.get(recordNum); 2386 final boolean isPop = isRecordPop.get(recordNum); 2387 if (isPop && record.mIndex >= 0) { 2388 freeBackStackIndex(record.mIndex); 2389 record.mIndex = -1; 2390 } 2391 record.runOnCommitRunnables(); 2392 } 2393 if (addToBackStack) { 2394 reportBackStackChanged(); 2395 } 2396 } 2397 2398 /** 2399 * Any fragments that were removed because they have been postponed should have their views 2400 * made invisible by setting their alpha to 0. 2401 * 2402 * @param fragments The fragments that were added during operation execution. Only the ones 2403 * that are no longer added will have their alpha changed. 2404 */ 2405 private void makeRemovedFragmentsInvisible(ArraySet<Fragment> fragments) { 2406 final int numAdded = fragments.size(); 2407 for (int i = 0; i < numAdded; i++) { 2408 final Fragment fragment = fragments.valueAt(i); 2409 if (!fragment.mAdded) { 2410 final View view = fragment.getView(); 2411 fragment.mPostponedAlpha = view.getAlpha(); 2412 view.setAlpha(0f); 2413 } 2414 } 2415 } 2416 2417 /** 2418 * Examine all transactions and determine which ones are marked as postponed. Those will 2419 * have their operations rolled back and moved to the end of the record list (up to endIndex). 2420 * It will also add the postponed transaction to the queue. 2421 * 2422 * @param records A list of BackStackRecords that should be checked. 2423 * @param isRecordPop The direction that these records are being run. 2424 * @param startIndex The index of the first record in <code>records</code> to be checked 2425 * @param endIndex One more than the final record index in <code>records</code> to be checked. 2426 * @return The index of the first postponed transaction or endIndex if no transaction was 2427 * postponed. 2428 */ 2429 private int postponePostponableTransactions(ArrayList<BackStackRecord> records, 2430 ArrayList<Boolean> isRecordPop, int startIndex, int endIndex, 2431 ArraySet<Fragment> added) { 2432 int postponeIndex = endIndex; 2433 for (int i = endIndex - 1; i >= startIndex; i--) { 2434 final BackStackRecord record = records.get(i); 2435 final boolean isPop = isRecordPop.get(i); 2436 boolean isPostponed = record.isPostponed() 2437 && !record.interactsWith(records, i + 1, endIndex); 2438 if (isPostponed) { 2439 if (mPostponedTransactions == null) { 2440 mPostponedTransactions = new ArrayList<>(); 2441 } 2442 StartEnterTransitionListener listener = 2443 new StartEnterTransitionListener(record, isPop); 2444 mPostponedTransactions.add(listener); 2445 record.setOnStartPostponedListener(listener); 2446 2447 // roll back the transaction 2448 if (isPop) { 2449 record.executeOps(); 2450 } else { 2451 record.executePopOps(false); 2452 } 2453 2454 // move to the end 2455 postponeIndex--; 2456 if (i != postponeIndex) { 2457 records.remove(i); 2458 records.add(postponeIndex, record); 2459 } 2460 2461 // different views may be visible now 2462 addAddedFragments(added); 2463 } 2464 } 2465 return postponeIndex; 2466 } 2467 2468 /** 2469 * When a postponed transaction is ready to be started, this completes the transaction, 2470 * removing, hiding, or showing views as well as starting the animations and transitions. 2471 * <p> 2472 * {@code runtransitions} is set to false when the transaction postponement was interrupted 2473 * abnormally -- normally by a new transaction being started that affects the postponed 2474 * transaction. 2475 * 2476 * @param record The transaction to run 2477 * @param isPop true if record is popping or false if it is adding 2478 * @param runTransitions true if the fragment transition should be run or false otherwise. 2479 * @param moveToState true if the state should be changed after executing the operations. 2480 * This is false when the transaction is canceled when a postponed 2481 * transaction is popped. 2482 */ 2483 private void completeExecute(BackStackRecord record, boolean isPop, boolean runTransitions, 2484 boolean moveToState) { 2485 ArrayList<BackStackRecord> records = new ArrayList<>(1); 2486 ArrayList<Boolean> isRecordPop = new ArrayList<>(1); 2487 records.add(record); 2488 isRecordPop.add(isPop); 2489 executeOps(records, isRecordPop, 0, 1); 2490 if (runTransitions) { 2491 FragmentTransition.startTransitions(this, records, isRecordPop, 0, 1, true); 2492 } 2493 if (moveToState) { 2494 moveToState(mCurState, true); 2495 } 2496 2497 if (mActive != null) { 2498 final int numActive = mActive.size(); 2499 for (int i = 0; i < numActive; i++) { 2500 // Allow added fragments to be removed during the pop since we aren't going 2501 // to move them to the final state with moveToState(mCurState). 2502 Fragment fragment = mActive.valueAt(i); 2503 if (fragment != null && fragment.mView != null && fragment.mIsNewlyAdded 2504 && record.interactsWith(fragment.mContainerId)) { 2505 if (fragment.mPostponedAlpha > 0) { 2506 fragment.mView.setAlpha(fragment.mPostponedAlpha); 2507 } 2508 if (moveToState) { 2509 fragment.mPostponedAlpha = 0; 2510 } else { 2511 fragment.mPostponedAlpha = -1; 2512 fragment.mIsNewlyAdded = false; 2513 } 2514 } 2515 } 2516 } 2517 } 2518 2519 /** 2520 * Find a fragment within the fragment's container whose View should be below the passed 2521 * fragment. {@code null} is returned when the fragment has no View or if there should be 2522 * no fragment with a View below the given fragment. 2523 * 2524 * As an example, if mAdded has two Fragments with Views sharing the same container: 2525 * FragmentA 2526 * FragmentB 2527 * 2528 * Then, when processing FragmentB, FragmentA will be returned. If, however, FragmentA 2529 * had no View, null would be returned. 2530 * 2531 * @param f The fragment that may be on top of another fragment. 2532 * @return The fragment with a View under f, if one exists or null if f has no View or 2533 * there are no fragments with Views in the same container. 2534 */ 2535 private Fragment findFragmentUnder(Fragment f) { 2536 final ViewGroup container = f.mContainer; 2537 final View view = f.mView; 2538 2539 if (container == null || view == null) { 2540 return null; 2541 } 2542 2543 final int fragmentIndex = mAdded.indexOf(f); 2544 for (int i = fragmentIndex - 1; i >= 0; i--) { 2545 Fragment underFragment = mAdded.get(i); 2546 if (underFragment.mContainer == container && underFragment.mView != null) { 2547 // Found the fragment under this one 2548 return underFragment; 2549 } 2550 } 2551 return null; 2552 } 2553 2554 /** 2555 * Run the operations in the BackStackRecords, either to push or pop. 2556 * 2557 * @param records The list of records whose operations should be run. 2558 * @param isRecordPop The direction that these records are being run. 2559 * @param startIndex The index of the first entry in records to run. 2560 * @param endIndex One past the index of the final entry in records to run. 2561 */ 2562 private static void executeOps(ArrayList<BackStackRecord> records, 2563 ArrayList<Boolean> isRecordPop, int startIndex, int endIndex) { 2564 for (int i = startIndex; i < endIndex; i++) { 2565 final BackStackRecord record = records.get(i); 2566 final boolean isPop = isRecordPop.get(i); 2567 if (isPop) { 2568 record.bumpBackStackNesting(-1); 2569 // Only execute the add operations at the end of 2570 // all transactions. 2571 boolean moveToState = i == (endIndex - 1); 2572 record.executePopOps(moveToState); 2573 } else { 2574 record.bumpBackStackNesting(1); 2575 record.executeOps(); 2576 } 2577 } 2578 } 2579 2580 /** 2581 * Ensure that fragments that are added are moved to at least the CREATED state. 2582 * Any newly-added Views are inserted into {@code added} so that the Transaction can be 2583 * postponed with {@link Fragment#postponeEnterTransition()}. They will later be made 2584 * invisible (by setting their alpha to 0) if they have been removed when postponed. 2585 */ 2586 private void addAddedFragments(ArraySet<Fragment> added) { 2587 if (mCurState < Fragment.CREATED) { 2588 return; 2589 } 2590 // We want to leave the fragment in the started state 2591 final int state = Math.min(mCurState, Fragment.STARTED); 2592 final int numAdded = mAdded == null ? 0 : mAdded.size(); 2593 for (int i = 0; i < numAdded; i++) { 2594 Fragment fragment = mAdded.get(i); 2595 if (fragment.mState < state) { 2596 moveToState(fragment, state, fragment.getNextAnim(), fragment.getNextTransition(), 2597 false); 2598 if (fragment.mView != null && !fragment.mHidden && fragment.mIsNewlyAdded) { 2599 added.add(fragment); 2600 } 2601 } 2602 } 2603 } 2604 2605 /** 2606 * Starts all postponed transactions regardless of whether they are ready or not. 2607 */ 2608 private void forcePostponedTransactions() { 2609 if (mPostponedTransactions != null) { 2610 while (!mPostponedTransactions.isEmpty()) { 2611 mPostponedTransactions.remove(0).completeTransaction(); 2612 } 2613 } 2614 } 2615 2616 /** 2617 * Ends the animations of fragments so that they immediately reach the end state. 2618 * This is used prior to saving the state so that the correct state is saved. 2619 */ 2620 private void endAnimatingAwayFragments() { 2621 final int numFragments = mActive == null ? 0 : mActive.size(); 2622 for (int i = 0; i < numFragments; i++) { 2623 Fragment fragment = mActive.valueAt(i); 2624 if (fragment != null) { 2625 if (fragment.getAnimatingAway() != null) { 2626 // Give up waiting for the animation and just end it. 2627 final int stateAfterAnimating = fragment.getStateAfterAnimating(); 2628 final View animatingAway = fragment.getAnimatingAway(); 2629 fragment.setAnimatingAway(null); 2630 Animation animation = animatingAway.getAnimation(); 2631 if (animation != null) { 2632 animation.cancel(); 2633 // force-clear the animation, as Animation#cancel() doesn't work prior to N, 2634 // and will instead cause the animation to infinitely loop 2635 animatingAway.clearAnimation(); 2636 } 2637 moveToState(fragment, stateAfterAnimating, 0, 0, false); 2638 } else if (fragment.getAnimator() != null) { 2639 fragment.getAnimator().end(); 2640 } 2641 } 2642 } 2643 } 2644 2645 /** 2646 * Adds all records in the pending actions to records and whether they are add or pop 2647 * operations to isPop. After executing, the pending actions will be empty. 2648 * 2649 * @param records All pending actions will generate BackStackRecords added to this. 2650 * This contains the transactions, in order, to execute. 2651 * @param isPop All pending actions will generate booleans to add to this. This contains 2652 * an entry for each entry in records to indicate whether or not it is a 2653 * pop action. 2654 */ 2655 private boolean generateOpsForPendingActions(ArrayList<BackStackRecord> records, 2656 ArrayList<Boolean> isPop) { 2657 boolean didSomething = false; 2658 synchronized (this) { 2659 if (mPendingActions == null || mPendingActions.size() == 0) { 2660 return false; 2661 } 2662 2663 final int numActions = mPendingActions.size(); 2664 for (int i = 0; i < numActions; i++) { 2665 didSomething |= mPendingActions.get(i).generateOps(records, isPop); 2666 } 2667 mPendingActions.clear(); 2668 mHost.getHandler().removeCallbacks(mExecCommit); 2669 } 2670 return didSomething; 2671 } 2672 2673 void doPendingDeferredStart() { 2674 if (mHavePendingDeferredStart) { 2675 boolean loadersRunning = false; 2676 for (int i = 0; i < mActive.size(); i++) { 2677 Fragment f = mActive.valueAt(i); 2678 if (f != null && f.mLoaderManager != null) { 2679 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 2680 } 2681 } 2682 if (!loadersRunning) { 2683 mHavePendingDeferredStart = false; 2684 startPendingDeferredFragments(); 2685 } 2686 } 2687 } 2688 2689 void reportBackStackChanged() { 2690 if (mBackStackChangeListeners != null) { 2691 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 2692 mBackStackChangeListeners.get(i).onBackStackChanged(); 2693 } 2694 } 2695 } 2696 2697 void addBackStackState(BackStackRecord state) { 2698 if (mBackStack == null) { 2699 mBackStack = new ArrayList<BackStackRecord>(); 2700 } 2701 mBackStack.add(state); 2702 reportBackStackChanged(); 2703 } 2704 2705 @SuppressWarnings("unused") 2706 boolean popBackStackState(ArrayList<BackStackRecord> records, ArrayList<Boolean> isRecordPop, 2707 String name, int id, int flags) { 2708 if (mBackStack == null) { 2709 return false; 2710 } 2711 if (name == null && id < 0 && (flags & POP_BACK_STACK_INCLUSIVE) == 0) { 2712 int last = mBackStack.size() - 1; 2713 if (last < 0) { 2714 return false; 2715 } 2716 records.add(mBackStack.remove(last)); 2717 isRecordPop.add(true); 2718 } else { 2719 int index = -1; 2720 if (name != null || id >= 0) { 2721 // If a name or ID is specified, look for that place in 2722 // the stack. 2723 index = mBackStack.size()-1; 2724 while (index >= 0) { 2725 BackStackRecord bss = mBackStack.get(index); 2726 if (name != null && name.equals(bss.getName())) { 2727 break; 2728 } 2729 if (id >= 0 && id == bss.mIndex) { 2730 break; 2731 } 2732 index--; 2733 } 2734 if (index < 0) { 2735 return false; 2736 } 2737 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 2738 index--; 2739 // Consume all following entries that match. 2740 while (index >= 0) { 2741 BackStackRecord bss = mBackStack.get(index); 2742 if ((name != null && name.equals(bss.getName())) 2743 || (id >= 0 && id == bss.mIndex)) { 2744 index--; 2745 continue; 2746 } 2747 break; 2748 } 2749 } 2750 } 2751 if (index == mBackStack.size()-1) { 2752 return false; 2753 } 2754 for (int i = mBackStack.size() - 1; i > index; i--) { 2755 records.add(mBackStack.remove(i)); 2756 isRecordPop.add(true); 2757 } 2758 } 2759 return true; 2760 } 2761 2762 FragmentManagerNonConfig retainNonConfig() { 2763 setRetaining(mSavedNonConfig); 2764 return mSavedNonConfig; 2765 } 2766 2767 /** 2768 * Recurse the FragmentManagerNonConfig fragments and set the mRetaining to true. This 2769 * was previously done while saving the non-config state, but that has been moved to 2770 * {@link #saveNonConfig()} called from {@link #saveAllState()}. If mRetaining is set too 2771 * early, the fragment won't be destroyed when the FragmentManager is destroyed. 2772 */ 2773 private static void setRetaining(FragmentManagerNonConfig nonConfig) { 2774 if (nonConfig == null) { 2775 return; 2776 } 2777 List<Fragment> fragments = nonConfig.getFragments(); 2778 if (fragments != null) { 2779 for (Fragment fragment : fragments) { 2780 fragment.mRetaining = true; 2781 } 2782 } 2783 List<FragmentManagerNonConfig> children = nonConfig.getChildNonConfigs(); 2784 if (children != null) { 2785 for (FragmentManagerNonConfig child : children) { 2786 setRetaining(child); 2787 } 2788 } 2789 } 2790 2791 void saveNonConfig() { 2792 ArrayList<Fragment> fragments = null; 2793 ArrayList<FragmentManagerNonConfig> childFragments = null; 2794 if (mActive != null) { 2795 for (int i=0; i<mActive.size(); i++) { 2796 Fragment f = mActive.valueAt(i); 2797 if (f != null) { 2798 if (f.mRetainInstance) { 2799 if (fragments == null) { 2800 fragments = new ArrayList<Fragment>(); 2801 } 2802 fragments.add(f); 2803 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 2804 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 2805 } 2806 boolean addedChild = false; 2807 if (f.mChildFragmentManager != null) { 2808 f.mChildFragmentManager.saveNonConfig(); 2809 FragmentManagerNonConfig child = f.mChildFragmentManager.mSavedNonConfig; 2810 if (child != null) { 2811 if (childFragments == null) { 2812 childFragments = new ArrayList<FragmentManagerNonConfig>(); 2813 for (int j = 0; j < i; j++) { 2814 childFragments.add(null); 2815 } 2816 } 2817 childFragments.add(child); 2818 addedChild = true; 2819 } 2820 } 2821 if (childFragments != null && !addedChild) { 2822 childFragments.add(null); 2823 } 2824 } 2825 } 2826 } 2827 if (fragments == null && childFragments == null) { 2828 mSavedNonConfig = null; 2829 } else { 2830 mSavedNonConfig = new FragmentManagerNonConfig(fragments, childFragments); 2831 } 2832 } 2833 2834 void saveFragmentViewState(Fragment f) { 2835 if (f.mInnerView == null) { 2836 return; 2837 } 2838 if (mStateArray == null) { 2839 mStateArray = new SparseArray<Parcelable>(); 2840 } else { 2841 mStateArray.clear(); 2842 } 2843 f.mInnerView.saveHierarchyState(mStateArray); 2844 if (mStateArray.size() > 0) { 2845 f.mSavedViewState = mStateArray; 2846 mStateArray = null; 2847 } 2848 } 2849 2850 Bundle saveFragmentBasicState(Fragment f) { 2851 Bundle result = null; 2852 2853 if (mStateBundle == null) { 2854 mStateBundle = new Bundle(); 2855 } 2856 f.performSaveInstanceState(mStateBundle); 2857 dispatchOnFragmentSaveInstanceState(f, mStateBundle, false); 2858 if (!mStateBundle.isEmpty()) { 2859 result = mStateBundle; 2860 mStateBundle = null; 2861 } 2862 2863 if (f.mView != null) { 2864 saveFragmentViewState(f); 2865 } 2866 if (f.mSavedViewState != null) { 2867 if (result == null) { 2868 result = new Bundle(); 2869 } 2870 result.putSparseParcelableArray( 2871 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 2872 } 2873 if (!f.mUserVisibleHint) { 2874 if (result == null) { 2875 result = new Bundle(); 2876 } 2877 // Only add this if it's not the default value 2878 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 2879 } 2880 2881 return result; 2882 } 2883 2884 Parcelable saveAllState() { 2885 // Make sure all pending operations have now been executed to get 2886 // our state update-to-date. 2887 forcePostponedTransactions(); 2888 endAnimatingAwayFragments(); 2889 execPendingActions(); 2890 2891 mStateSaved = true; 2892 mSavedNonConfig = null; 2893 2894 if (mActive == null || mActive.size() <= 0) { 2895 return null; 2896 } 2897 2898 // First collect all active fragments. 2899 int N = mActive.size(); 2900 FragmentState[] active = new FragmentState[N]; 2901 boolean haveFragments = false; 2902 for (int i=0; i<N; i++) { 2903 Fragment f = mActive.valueAt(i); 2904 if (f != null) { 2905 if (f.mIndex < 0) { 2906 throwException(new IllegalStateException( 2907 "Failure saving state: active " + f 2908 + " has cleared index: " + f.mIndex)); 2909 } 2910 2911 haveFragments = true; 2912 2913 FragmentState fs = new FragmentState(f); 2914 active[i] = fs; 2915 2916 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 2917 fs.mSavedFragmentState = saveFragmentBasicState(f); 2918 2919 if (f.mTarget != null) { 2920 if (f.mTarget.mIndex < 0) { 2921 throwException(new IllegalStateException( 2922 "Failure saving state: " + f 2923 + " has target not in fragment manager: " + f.mTarget)); 2924 } 2925 if (fs.mSavedFragmentState == null) { 2926 fs.mSavedFragmentState = new Bundle(); 2927 } 2928 putFragment(fs.mSavedFragmentState, 2929 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 2930 if (f.mTargetRequestCode != 0) { 2931 fs.mSavedFragmentState.putInt( 2932 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 2933 f.mTargetRequestCode); 2934 } 2935 } 2936 2937 } else { 2938 fs.mSavedFragmentState = f.mSavedFragmentState; 2939 } 2940 2941 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 2942 + fs.mSavedFragmentState); 2943 } 2944 } 2945 2946 if (!haveFragments) { 2947 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 2948 return null; 2949 } 2950 2951 int[] added = null; 2952 BackStackState[] backStack = null; 2953 2954 // Build list of currently added fragments. 2955 if (mAdded != null) { 2956 N = mAdded.size(); 2957 if (N > 0) { 2958 added = new int[N]; 2959 for (int i=0; i<N; i++) { 2960 added[i] = mAdded.get(i).mIndex; 2961 if (added[i] < 0) { 2962 throwException(new IllegalStateException( 2963 "Failure saving state: active " + mAdded.get(i) 2964 + " has cleared index: " + added[i])); 2965 } 2966 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 2967 + ": " + mAdded.get(i)); 2968 } 2969 } 2970 } 2971 2972 // Now save back stack. 2973 if (mBackStack != null) { 2974 N = mBackStack.size(); 2975 if (N > 0) { 2976 backStack = new BackStackState[N]; 2977 for (int i=0; i<N; i++) { 2978 backStack[i] = new BackStackState(mBackStack.get(i)); 2979 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 2980 + ": " + mBackStack.get(i)); 2981 } 2982 } 2983 } 2984 2985 FragmentManagerState fms = new FragmentManagerState(); 2986 fms.mActive = active; 2987 fms.mAdded = added; 2988 fms.mBackStack = backStack; 2989 if (mPrimaryNav != null) { 2990 fms.mPrimaryNavActiveIndex = mPrimaryNav.mIndex; 2991 } 2992 fms.mNextFragmentIndex = mNextFragmentIndex; 2993 saveNonConfig(); 2994 return fms; 2995 } 2996 2997 void restoreAllState(Parcelable state, FragmentManagerNonConfig nonConfig) { 2998 // If there is no saved state at all, then there can not be 2999 // any nonConfig fragments either, so that is that. 3000 if (state == null) return; 3001 FragmentManagerState fms = (FragmentManagerState)state; 3002 if (fms.mActive == null) return; 3003 3004 List<FragmentManagerNonConfig> childNonConfigs = null; 3005 3006 // First re-attach any non-config instances we are retaining back 3007 // to their saved state, so we don't try to instantiate them again. 3008 if (nonConfig != null) { 3009 List<Fragment> nonConfigFragments = nonConfig.getFragments(); 3010 childNonConfigs = nonConfig.getChildNonConfigs(); 3011 final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; 3012 for (int i = 0; i < count; i++) { 3013 Fragment f = nonConfigFragments.get(i); 3014 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 3015 int index = 0; // index into fms.mActive 3016 while (index < fms.mActive.length && fms.mActive[index].mIndex != f.mIndex) { 3017 index++; 3018 } 3019 if (index == fms.mActive.length) { 3020 throwException(new IllegalStateException("Could not find active fragment " 3021 + "with index " + f.mIndex)); 3022 } 3023 FragmentState fs = fms.mActive[index]; 3024 fs.mInstance = f; 3025 f.mSavedViewState = null; 3026 f.mBackStackNesting = 0; 3027 f.mInLayout = false; 3028 f.mAdded = false; 3029 f.mTarget = null; 3030 if (fs.mSavedFragmentState != null) { 3031 fs.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 3032 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 3033 FragmentManagerImpl.VIEW_STATE_TAG); 3034 f.mSavedFragmentState = fs.mSavedFragmentState; 3035 } 3036 } 3037 } 3038 3039 // Build the full list of active fragments, instantiating them from 3040 // their saved state. 3041 mActive = new SparseArray<>(fms.mActive.length); 3042 for (int i=0; i<fms.mActive.length; i++) { 3043 FragmentState fs = fms.mActive[i]; 3044 if (fs != null) { 3045 FragmentManagerNonConfig childNonConfig = null; 3046 if (childNonConfigs != null && i < childNonConfigs.size()) { 3047 childNonConfig = childNonConfigs.get(i); 3048 } 3049 Fragment f = fs.instantiate(mHost, mContainer, mParent, childNonConfig); 3050 if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); 3051 mActive.put(f.mIndex, f); 3052 // Now that the fragment is instantiated (or came from being 3053 // retained above), clear mInstance in case we end up re-restoring 3054 // from this FragmentState again. 3055 fs.mInstance = null; 3056 } 3057 } 3058 3059 // Update the target of all retained fragments. 3060 if (nonConfig != null) { 3061 List<Fragment> nonConfigFragments = nonConfig.getFragments(); 3062 final int count = nonConfigFragments != null ? nonConfigFragments.size() : 0; 3063 for (int i = 0; i < count; i++) { 3064 Fragment f = nonConfigFragments.get(i); 3065 if (f.mTargetIndex >= 0) { 3066 f.mTarget = mActive.get(f.mTargetIndex); 3067 if (f.mTarget == null) { 3068 Log.w(TAG, "Re-attaching retained fragment " + f 3069 + " target no longer exists: " + f.mTargetIndex); 3070 } 3071 } 3072 } 3073 } 3074 3075 // Build the list of currently added fragments. 3076 if (fms.mAdded != null) { 3077 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 3078 for (int i=0; i<fms.mAdded.length; i++) { 3079 Fragment f = mActive.get(fms.mAdded[i]); 3080 if (f == null) { 3081 throwException(new IllegalStateException( 3082 "No instantiated fragment for index #" + fms.mAdded[i])); 3083 } 3084 f.mAdded = true; 3085 if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); 3086 if (mAdded.contains(f)) { 3087 throw new IllegalStateException("Already added!"); 3088 } 3089 synchronized (mAdded) { 3090 mAdded.add(f); 3091 } 3092 } 3093 } else { 3094 mAdded = null; 3095 } 3096 3097 // Build the back stack. 3098 if (fms.mBackStack != null) { 3099 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 3100 for (int i=0; i<fms.mBackStack.length; i++) { 3101 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 3102 if (DEBUG) { 3103 Log.v(TAG, "restoreAllState: back stack #" + i 3104 + " (index " + bse.mIndex + "): " + bse); 3105 LogWriter logw = new LogWriter(TAG); 3106 PrintWriter pw = new PrintWriter(logw); 3107 bse.dump(" ", pw, false); 3108 pw.close(); 3109 } 3110 mBackStack.add(bse); 3111 if (bse.mIndex >= 0) { 3112 setBackStackIndex(bse.mIndex, bse); 3113 } 3114 } 3115 } else { 3116 mBackStack = null; 3117 } 3118 3119 if (fms.mPrimaryNavActiveIndex >= 0) { 3120 mPrimaryNav = mActive.get(fms.mPrimaryNavActiveIndex); 3121 } 3122 this.mNextFragmentIndex = fms.mNextFragmentIndex; 3123 } 3124 3125 /** 3126 * To prevent list modification errors, mActive sets values to null instead of 3127 * removing them when the Fragment becomes inactive. This cleans up the list at the 3128 * end of executing the transactions. 3129 */ 3130 private void burpActive() { 3131 if (mActive != null) { 3132 for (int i = mActive.size() - 1; i >= 0; i--) { 3133 if (mActive.valueAt(i) == null) { 3134 mActive.delete(mActive.keyAt(i)); 3135 } 3136 } 3137 } 3138 } 3139 3140 public void attachController(FragmentHostCallback host, 3141 FragmentContainer container, Fragment parent) { 3142 if (mHost != null) throw new IllegalStateException("Already attached"); 3143 mHost = host; 3144 mContainer = container; 3145 mParent = parent; 3146 } 3147 3148 public void noteStateNotSaved() { 3149 mSavedNonConfig = null; 3150 mStateSaved = false; 3151 final int addedCount = mAdded == null ? 0 : mAdded.size(); 3152 for (int i = 0; i < addedCount; i++) { 3153 Fragment fragment = mAdded.get(i); 3154 if (fragment != null) { 3155 fragment.noteStateNotSaved(); 3156 } 3157 } 3158 } 3159 3160 public void dispatchCreate() { 3161 mStateSaved = false; 3162 dispatchStateChange(Fragment.CREATED); 3163 } 3164 3165 public void dispatchActivityCreated() { 3166 mStateSaved = false; 3167 dispatchStateChange(Fragment.ACTIVITY_CREATED); 3168 } 3169 3170 public void dispatchStart() { 3171 mStateSaved = false; 3172 dispatchStateChange(Fragment.STARTED); 3173 } 3174 3175 public void dispatchResume() { 3176 mStateSaved = false; 3177 dispatchStateChange(Fragment.RESUMED); 3178 } 3179 3180 public void dispatchPause() { 3181 dispatchStateChange(Fragment.STARTED); 3182 } 3183 3184 public void dispatchStop() { 3185 // See saveAllState() for the explanation of this. We do this for 3186 // all platform versions, to keep our behavior more consistent between 3187 // them. 3188 mStateSaved = true; 3189 3190 dispatchStateChange(Fragment.STOPPED); 3191 } 3192 3193 public void dispatchReallyStop() { 3194 dispatchStateChange(Fragment.ACTIVITY_CREATED); 3195 } 3196 3197 public void dispatchDestroyView() { 3198 dispatchStateChange(Fragment.CREATED); 3199 } 3200 3201 public void dispatchDestroy() { 3202 mDestroyed = true; 3203 execPendingActions(); 3204 dispatchStateChange(Fragment.INITIALIZING); 3205 mHost = null; 3206 mContainer = null; 3207 mParent = null; 3208 } 3209 3210 private void dispatchStateChange(int nextState) { 3211 try { 3212 mExecutingActions = true; 3213 moveToState(nextState, false); 3214 } finally { 3215 mExecutingActions = false; 3216 } 3217 execPendingActions(); 3218 } 3219 3220 public void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode) { 3221 if (mAdded == null) { 3222 return; 3223 } 3224 for (int i = mAdded.size() - 1; i >= 0; --i) { 3225 final android.support.v4.app.Fragment f = mAdded.get(i); 3226 if (f != null) { 3227 f.performMultiWindowModeChanged(isInMultiWindowMode); 3228 } 3229 } 3230 } 3231 3232 public void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 3233 if (mAdded == null) { 3234 return; 3235 } 3236 for (int i = mAdded.size() - 1; i >= 0; --i) { 3237 final android.support.v4.app.Fragment f = mAdded.get(i); 3238 if (f != null) { 3239 f.performPictureInPictureModeChanged(isInPictureInPictureMode); 3240 } 3241 } 3242 } 3243 3244 public void dispatchConfigurationChanged(Configuration newConfig) { 3245 if (mAdded != null) { 3246 for (int i=0; i<mAdded.size(); i++) { 3247 Fragment f = mAdded.get(i); 3248 if (f != null) { 3249 f.performConfigurationChanged(newConfig); 3250 } 3251 } 3252 } 3253 } 3254 3255 public void dispatchLowMemory() { 3256 if (mAdded != null) { 3257 for (int i=0; i<mAdded.size(); i++) { 3258 Fragment f = mAdded.get(i); 3259 if (f != null) { 3260 f.performLowMemory(); 3261 } 3262 } 3263 } 3264 } 3265 3266 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 3267 boolean show = false; 3268 ArrayList<Fragment> newMenus = null; 3269 if (mAdded != null) { 3270 for (int i=0; i<mAdded.size(); i++) { 3271 Fragment f = mAdded.get(i); 3272 if (f != null) { 3273 if (f.performCreateOptionsMenu(menu, inflater)) { 3274 show = true; 3275 if (newMenus == null) { 3276 newMenus = new ArrayList<Fragment>(); 3277 } 3278 newMenus.add(f); 3279 } 3280 } 3281 } 3282 } 3283 3284 if (mCreatedMenus != null) { 3285 for (int i=0; i<mCreatedMenus.size(); i++) { 3286 Fragment f = mCreatedMenus.get(i); 3287 if (newMenus == null || !newMenus.contains(f)) { 3288 f.onDestroyOptionsMenu(); 3289 } 3290 } 3291 } 3292 3293 mCreatedMenus = newMenus; 3294 3295 return show; 3296 } 3297 3298 public boolean dispatchPrepareOptionsMenu(Menu menu) { 3299 boolean show = false; 3300 if (mAdded != null) { 3301 for (int i=0; i<mAdded.size(); i++) { 3302 Fragment f = mAdded.get(i); 3303 if (f != null) { 3304 if (f.performPrepareOptionsMenu(menu)) { 3305 show = true; 3306 } 3307 } 3308 } 3309 } 3310 return show; 3311 } 3312 3313 public boolean dispatchOptionsItemSelected(MenuItem item) { 3314 if (mAdded != null) { 3315 for (int i=0; i<mAdded.size(); i++) { 3316 Fragment f = mAdded.get(i); 3317 if (f != null) { 3318 if (f.performOptionsItemSelected(item)) { 3319 return true; 3320 } 3321 } 3322 } 3323 } 3324 return false; 3325 } 3326 3327 public boolean dispatchContextItemSelected(MenuItem item) { 3328 if (mAdded != null) { 3329 for (int i=0; i<mAdded.size(); i++) { 3330 Fragment f = mAdded.get(i); 3331 if (f != null) { 3332 if (f.performContextItemSelected(item)) { 3333 return true; 3334 } 3335 } 3336 } 3337 } 3338 return false; 3339 } 3340 3341 public void dispatchOptionsMenuClosed(Menu menu) { 3342 if (mAdded != null) { 3343 for (int i=0; i<mAdded.size(); i++) { 3344 Fragment f = mAdded.get(i); 3345 if (f != null) { 3346 f.performOptionsMenuClosed(menu); 3347 } 3348 } 3349 } 3350 } 3351 3352 @SuppressWarnings("ReferenceEquality") 3353 public void setPrimaryNavigationFragment(Fragment f) { 3354 if (f != null && (mActive.get(f.mIndex) != f 3355 || (f.mHost != null && f.getFragmentManager() != this))) { 3356 throw new IllegalArgumentException("Fragment " + f 3357 + " is not an active fragment of FragmentManager " + this); 3358 } 3359 mPrimaryNav = f; 3360 } 3361 3362 @Override 3363 public Fragment getPrimaryNavigationFragment() { 3364 return mPrimaryNav; 3365 } 3366 3367 @Override 3368 public void registerFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb, 3369 boolean recursive) { 3370 if (mLifecycleCallbacks == null) { 3371 mLifecycleCallbacks = new CopyOnWriteArrayList<>(); 3372 } 3373 mLifecycleCallbacks.add(new Pair<>(cb, recursive)); 3374 } 3375 3376 @Override 3377 public void unregisterFragmentLifecycleCallbacks(FragmentLifecycleCallbacks cb) { 3378 if (mLifecycleCallbacks == null) { 3379 return; 3380 } 3381 3382 synchronized (mLifecycleCallbacks) { 3383 for (int i = 0, N = mLifecycleCallbacks.size(); i < N; i++) { 3384 if (mLifecycleCallbacks.get(i).first == cb) { 3385 mLifecycleCallbacks.remove(i); 3386 break; 3387 } 3388 } 3389 } 3390 } 3391 3392 void dispatchOnFragmentPreAttached(Fragment f, Context context, boolean onlyRecursive) { 3393 if (mParent != null) { 3394 FragmentManager parentManager = mParent.getFragmentManager(); 3395 if (parentManager instanceof FragmentManagerImpl) { 3396 ((FragmentManagerImpl) parentManager) 3397 .dispatchOnFragmentPreAttached(f, context, true); 3398 } 3399 } 3400 if (mLifecycleCallbacks == null) { 3401 return; 3402 } 3403 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3404 if (!onlyRecursive || p.second) { 3405 p.first.onFragmentPreAttached(this, f, context); 3406 } 3407 } 3408 } 3409 3410 void dispatchOnFragmentAttached(Fragment f, Context context, boolean onlyRecursive) { 3411 if (mParent != null) { 3412 FragmentManager parentManager = mParent.getFragmentManager(); 3413 if (parentManager instanceof FragmentManagerImpl) { 3414 ((FragmentManagerImpl) parentManager) 3415 .dispatchOnFragmentAttached(f, context, true); 3416 } 3417 } 3418 if (mLifecycleCallbacks == null) { 3419 return; 3420 } 3421 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3422 if (!onlyRecursive || p.second) { 3423 p.first.onFragmentAttached(this, f, context); 3424 } 3425 } 3426 } 3427 3428 void dispatchOnFragmentCreated(Fragment f, Bundle savedInstanceState, boolean onlyRecursive) { 3429 if (mParent != null) { 3430 FragmentManager parentManager = mParent.getFragmentManager(); 3431 if (parentManager instanceof FragmentManagerImpl) { 3432 ((FragmentManagerImpl) parentManager) 3433 .dispatchOnFragmentCreated(f, savedInstanceState, true); 3434 } 3435 } 3436 if (mLifecycleCallbacks == null) { 3437 return; 3438 } 3439 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3440 if (!onlyRecursive || p.second) { 3441 p.first.onFragmentCreated(this, f, savedInstanceState); 3442 } 3443 } 3444 } 3445 3446 void dispatchOnFragmentActivityCreated(Fragment f, Bundle savedInstanceState, 3447 boolean onlyRecursive) { 3448 if (mParent != null) { 3449 FragmentManager parentManager = mParent.getFragmentManager(); 3450 if (parentManager instanceof FragmentManagerImpl) { 3451 ((FragmentManagerImpl) parentManager) 3452 .dispatchOnFragmentActivityCreated(f, savedInstanceState, true); 3453 } 3454 } 3455 if (mLifecycleCallbacks == null) { 3456 return; 3457 } 3458 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3459 if (!onlyRecursive || p.second) { 3460 p.first.onFragmentActivityCreated(this, f, savedInstanceState); 3461 } 3462 } 3463 } 3464 3465 void dispatchOnFragmentViewCreated(Fragment f, View v, Bundle savedInstanceState, 3466 boolean onlyRecursive) { 3467 if (mParent != null) { 3468 FragmentManager parentManager = mParent.getFragmentManager(); 3469 if (parentManager instanceof FragmentManagerImpl) { 3470 ((FragmentManagerImpl) parentManager) 3471 .dispatchOnFragmentViewCreated(f, v, savedInstanceState, true); 3472 } 3473 } 3474 if (mLifecycleCallbacks == null) { 3475 return; 3476 } 3477 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3478 if (!onlyRecursive || p.second) { 3479 p.first.onFragmentViewCreated(this, f, v, savedInstanceState); 3480 } 3481 } 3482 } 3483 3484 void dispatchOnFragmentStarted(Fragment f, boolean onlyRecursive) { 3485 if (mParent != null) { 3486 FragmentManager parentManager = mParent.getFragmentManager(); 3487 if (parentManager instanceof FragmentManagerImpl) { 3488 ((FragmentManagerImpl) parentManager) 3489 .dispatchOnFragmentStarted(f, true); 3490 } 3491 } 3492 if (mLifecycleCallbacks == null) { 3493 return; 3494 } 3495 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3496 if (!onlyRecursive || p.second) { 3497 p.first.onFragmentStarted(this, f); 3498 } 3499 } 3500 } 3501 3502 void dispatchOnFragmentResumed(Fragment f, boolean onlyRecursive) { 3503 if (mParent != null) { 3504 FragmentManager parentManager = mParent.getFragmentManager(); 3505 if (parentManager instanceof FragmentManagerImpl) { 3506 ((FragmentManagerImpl) parentManager) 3507 .dispatchOnFragmentResumed(f, true); 3508 } 3509 } 3510 if (mLifecycleCallbacks == null) { 3511 return; 3512 } 3513 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3514 if (!onlyRecursive || p.second) { 3515 p.first.onFragmentResumed(this, f); 3516 } 3517 } 3518 } 3519 3520 void dispatchOnFragmentPaused(Fragment f, boolean onlyRecursive) { 3521 if (mParent != null) { 3522 FragmentManager parentManager = mParent.getFragmentManager(); 3523 if (parentManager instanceof FragmentManagerImpl) { 3524 ((FragmentManagerImpl) parentManager) 3525 .dispatchOnFragmentPaused(f, true); 3526 } 3527 } 3528 if (mLifecycleCallbacks == null) { 3529 return; 3530 } 3531 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3532 if (!onlyRecursive || p.second) { 3533 p.first.onFragmentPaused(this, f); 3534 } 3535 } 3536 } 3537 3538 void dispatchOnFragmentStopped(Fragment f, boolean onlyRecursive) { 3539 if (mParent != null) { 3540 FragmentManager parentManager = mParent.getFragmentManager(); 3541 if (parentManager instanceof FragmentManagerImpl) { 3542 ((FragmentManagerImpl) parentManager) 3543 .dispatchOnFragmentStopped(f, true); 3544 } 3545 } 3546 if (mLifecycleCallbacks == null) { 3547 return; 3548 } 3549 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3550 if (!onlyRecursive || p.second) { 3551 p.first.onFragmentStopped(this, f); 3552 } 3553 } 3554 } 3555 3556 void dispatchOnFragmentSaveInstanceState(Fragment f, Bundle outState, boolean onlyRecursive) { 3557 if (mParent != null) { 3558 FragmentManager parentManager = mParent.getFragmentManager(); 3559 if (parentManager instanceof FragmentManagerImpl) { 3560 ((FragmentManagerImpl) parentManager) 3561 .dispatchOnFragmentSaveInstanceState(f, outState, true); 3562 } 3563 } 3564 if (mLifecycleCallbacks == null) { 3565 return; 3566 } 3567 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3568 if (!onlyRecursive || p.second) { 3569 p.first.onFragmentSaveInstanceState(this, f, outState); 3570 } 3571 } 3572 } 3573 3574 void dispatchOnFragmentViewDestroyed(Fragment f, boolean onlyRecursive) { 3575 if (mParent != null) { 3576 FragmentManager parentManager = mParent.getFragmentManager(); 3577 if (parentManager instanceof FragmentManagerImpl) { 3578 ((FragmentManagerImpl) parentManager) 3579 .dispatchOnFragmentViewDestroyed(f, true); 3580 } 3581 } 3582 if (mLifecycleCallbacks == null) { 3583 return; 3584 } 3585 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3586 if (!onlyRecursive || p.second) { 3587 p.first.onFragmentViewDestroyed(this, f); 3588 } 3589 } 3590 } 3591 3592 void dispatchOnFragmentDestroyed(Fragment f, boolean onlyRecursive) { 3593 if (mParent != null) { 3594 FragmentManager parentManager = mParent.getFragmentManager(); 3595 if (parentManager instanceof FragmentManagerImpl) { 3596 ((FragmentManagerImpl) parentManager) 3597 .dispatchOnFragmentDestroyed(f, true); 3598 } 3599 } 3600 if (mLifecycleCallbacks == null) { 3601 return; 3602 } 3603 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3604 if (!onlyRecursive || p.second) { 3605 p.first.onFragmentDestroyed(this, f); 3606 } 3607 } 3608 } 3609 3610 void dispatchOnFragmentDetached(Fragment f, boolean onlyRecursive) { 3611 if (mParent != null) { 3612 FragmentManager parentManager = mParent.getFragmentManager(); 3613 if (parentManager instanceof FragmentManagerImpl) { 3614 ((FragmentManagerImpl) parentManager) 3615 .dispatchOnFragmentDetached(f, true); 3616 } 3617 } 3618 if (mLifecycleCallbacks == null) { 3619 return; 3620 } 3621 for (Pair<FragmentLifecycleCallbacks, Boolean> p : mLifecycleCallbacks) { 3622 if (!onlyRecursive || p.second) { 3623 p.first.onFragmentDetached(this, f); 3624 } 3625 } 3626 } 3627 3628 public static int reverseTransit(int transit) { 3629 int rev = 0; 3630 switch (transit) { 3631 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 3632 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 3633 break; 3634 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 3635 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 3636 break; 3637 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 3638 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 3639 break; 3640 } 3641 return rev; 3642 3643 } 3644 3645 public static final int ANIM_STYLE_OPEN_ENTER = 1; 3646 public static final int ANIM_STYLE_OPEN_EXIT = 2; 3647 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 3648 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 3649 public static final int ANIM_STYLE_FADE_ENTER = 5; 3650 public static final int ANIM_STYLE_FADE_EXIT = 6; 3651 3652 public static int transitToStyleIndex(int transit, boolean enter) { 3653 int animAttr = -1; 3654 switch (transit) { 3655 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 3656 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 3657 break; 3658 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 3659 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 3660 break; 3661 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 3662 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 3663 break; 3664 } 3665 return animAttr; 3666 } 3667 3668 @Override 3669 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 3670 if (!"fragment".equals(name)) { 3671 return null; 3672 } 3673 3674 String fname = attrs.getAttributeValue(null, "class"); 3675 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 3676 if (fname == null) { 3677 fname = a.getString(FragmentTag.Fragment_name); 3678 } 3679 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 3680 String tag = a.getString(FragmentTag.Fragment_tag); 3681 a.recycle(); 3682 3683 if (!Fragment.isSupportFragmentClass(mHost.getContext(), fname)) { 3684 // Invalid support lib fragment; let the device's framework handle it. 3685 // This will allow android.app.Fragments to do the right thing. 3686 return null; 3687 } 3688 3689 int containerId = parent != null ? parent.getId() : 0; 3690 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 3691 throw new IllegalArgumentException(attrs.getPositionDescription() 3692 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 3693 } 3694 3695 // If we restored from a previous state, we may already have 3696 // instantiated this fragment from the state and should use 3697 // that instance instead of making a new one. 3698 Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null; 3699 if (fragment == null && tag != null) { 3700 fragment = findFragmentByTag(tag); 3701 } 3702 if (fragment == null && containerId != View.NO_ID) { 3703 fragment = findFragmentById(containerId); 3704 } 3705 3706 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 3707 + Integer.toHexString(id) + " fname=" + fname 3708 + " existing=" + fragment); 3709 if (fragment == null) { 3710 fragment = mContainer.instantiate(context, fname, null); 3711 fragment.mFromLayout = true; 3712 fragment.mFragmentId = id != 0 ? id : containerId; 3713 fragment.mContainerId = containerId; 3714 fragment.mTag = tag; 3715 fragment.mInLayout = true; 3716 fragment.mFragmentManager = this; 3717 fragment.mHost = mHost; 3718 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 3719 addFragment(fragment, true); 3720 3721 } else if (fragment.mInLayout) { 3722 // A fragment already exists and it is not one we restored from 3723 // previous state. 3724 throw new IllegalArgumentException(attrs.getPositionDescription() 3725 + ": Duplicate id 0x" + Integer.toHexString(id) 3726 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 3727 + " with another fragment for " + fname); 3728 } else { 3729 // This fragment was retained from a previous instance; get it 3730 // going now. 3731 fragment.mInLayout = true; 3732 fragment.mHost = mHost; 3733 // If this fragment is newly instantiated (either right now, or 3734 // from last saved state), then give it the attributes to 3735 // initialize itself. 3736 if (!fragment.mRetaining) { 3737 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 3738 } 3739 } 3740 3741 // If we haven't finished entering the CREATED state ourselves yet, 3742 // push the inflated child fragment along. This will ensureInflatedFragmentView 3743 // at the right phase of the lifecycle so that we will have mView populated 3744 // for compliant fragments below. 3745 if (mCurState < Fragment.CREATED && fragment.mFromLayout) { 3746 moveToState(fragment, Fragment.CREATED, 0, 0, false); 3747 } else { 3748 moveToState(fragment); 3749 } 3750 3751 if (fragment.mView == null) { 3752 throw new IllegalStateException("Fragment " + fname 3753 + " did not create a view."); 3754 } 3755 if (id != 0) { 3756 fragment.mView.setId(id); 3757 } 3758 if (fragment.mView.getTag() == null) { 3759 fragment.mView.setTag(tag); 3760 } 3761 return fragment.mView; 3762 } 3763 3764 @Override 3765 public View onCreateView(String name, Context context, AttributeSet attrs) { 3766 return onCreateView(null, name, context, attrs); 3767 } 3768 3769 LayoutInflater.Factory2 getLayoutInflaterFactory() { 3770 return this; 3771 } 3772 3773 static class FragmentTag { 3774 public static final int[] Fragment = { 3775 0x01010003, 0x010100d0, 0x010100d1 3776 }; 3777 public static final int Fragment_id = 1; 3778 public static final int Fragment_name = 0; 3779 public static final int Fragment_tag = 2; 3780 } 3781 3782 /** 3783 * An add or pop transaction to be scheduled for the UI thread. 3784 */ 3785 interface OpGenerator { 3786 /** 3787 * Generate transactions to add to {@code records} and whether or not the transaction is 3788 * an add or pop to {@code isRecordPop}. 3789 * 3790 * records and isRecordPop must be added equally so that each transaction in records 3791 * matches the boolean for whether or not it is a pop in isRecordPop. 3792 * 3793 * @param records A list to add transactions to. 3794 * @param isRecordPop A list to add whether or not the transactions added to records is 3795 * a pop transaction. 3796 * @return true if something was added or false otherwise. 3797 */ 3798 boolean generateOps(ArrayList<BackStackRecord> records, ArrayList<Boolean> isRecordPop); 3799 } 3800 3801 /** 3802 * A pop operation OpGenerator. This will be run on the UI thread and will generate the 3803 * transactions that will be popped if anything can be popped. 3804 */ 3805 private class PopBackStackState implements OpGenerator { 3806 final String mName; 3807 final int mId; 3808 final int mFlags; 3809 3810 PopBackStackState(String name, int id, int flags) { 3811 mName = name; 3812 mId = id; 3813 mFlags = flags; 3814 } 3815 3816 @Override 3817 public boolean generateOps(ArrayList<BackStackRecord> records, 3818 ArrayList<Boolean> isRecordPop) { 3819 if (mPrimaryNav != null // We have a primary nav fragment 3820 && mId < 0 // No valid id (since they're local) 3821 && mName == null) { // no name to pop to (since they're local) 3822 final FragmentManager childManager = mPrimaryNav.peekChildFragmentManager(); 3823 if (childManager != null && childManager.popBackStackImmediate()) { 3824 // We didn't add any operations for this FragmentManager even though 3825 // a child did do work. 3826 return false; 3827 } 3828 } 3829 return popBackStackState(records, isRecordPop, mName, mId, mFlags); 3830 } 3831 } 3832 3833 /** 3834 * A listener for a postponed transaction. This waits until 3835 * {@link Fragment#startPostponedEnterTransition()} is called or a transaction is started 3836 * that interacts with this one, based on interactions with the fragment container. 3837 */ 3838 static class StartEnterTransitionListener 3839 implements Fragment.OnStartEnterTransitionListener { 3840 private final boolean mIsBack; 3841 private final BackStackRecord mRecord; 3842 private int mNumPostponed; 3843 3844 StartEnterTransitionListener(BackStackRecord record, boolean isBack) { 3845 mIsBack = isBack; 3846 mRecord = record; 3847 } 3848 3849 /** 3850 * Called from {@link Fragment#startPostponedEnterTransition()}, this decreases the 3851 * number of Fragments that are postponed. This may cause the transaction to schedule 3852 * to finish running and run transitions and animations. 3853 */ 3854 @Override 3855 public void onStartEnterTransition() { 3856 mNumPostponed--; 3857 if (mNumPostponed != 0) { 3858 return; 3859 } 3860 mRecord.mManager.scheduleCommit(); 3861 } 3862 3863 /** 3864 * Called from {@link Fragment# 3865 * setOnStartEnterTransitionListener(Fragment.OnStartEnterTransitionListener)}, this 3866 * increases the number of fragments that are postponed as part of this transaction. 3867 */ 3868 @Override 3869 public void startListening() { 3870 mNumPostponed++; 3871 } 3872 3873 /** 3874 * @return true if there are no more postponed fragments as part of the transaction. 3875 */ 3876 public boolean isReady() { 3877 return mNumPostponed == 0; 3878 } 3879 3880 /** 3881 * Completes the transaction and start the animations and transitions. This may skip 3882 * the transitions if this is called before all fragments have called 3883 * {@link Fragment#startPostponedEnterTransition()}. 3884 */ 3885 public void completeTransaction() { 3886 final boolean canceled; 3887 canceled = mNumPostponed > 0; 3888 FragmentManagerImpl manager = mRecord.mManager; 3889 final int numAdded = manager.mAdded.size(); 3890 for (int i = 0; i < numAdded; i++) { 3891 final Fragment fragment = manager.mAdded.get(i); 3892 fragment.setOnStartEnterTransitionListener(null); 3893 if (canceled && fragment.isPostponed()) { 3894 fragment.startPostponedEnterTransition(); 3895 } 3896 } 3897 mRecord.mManager.completeExecute(mRecord, mIsBack, !canceled, true); 3898 } 3899 3900 /** 3901 * Cancels this transaction instead of completing it. That means that the state isn't 3902 * changed, so the pop results in no change to the state. 3903 */ 3904 public void cancelTransaction() { 3905 mRecord.mManager.completeExecute(mRecord, mIsBack, false, false); 3906 } 3907 } 3908 3909 /** 3910 * Contains either an animator or animation. One of these should be null. 3911 */ 3912 private static class AnimationOrAnimator { 3913 public final Animation animation; 3914 public final Animator animator; 3915 3916 private AnimationOrAnimator(Animation animation) { 3917 this.animation = animation; 3918 this.animator = null; 3919 if (animation == null) { 3920 throw new IllegalStateException("Animation cannot be null"); 3921 } 3922 } 3923 3924 private AnimationOrAnimator(Animator animator) { 3925 this.animation = null; 3926 this.animator = animator; 3927 if (animator == null) { 3928 throw new IllegalStateException("Animator cannot be null"); 3929 } 3930 } 3931 } 3932 3933 /** 3934 * Wrap an AnimationListener that can be null. This allows us to chain animation listeners. 3935 */ 3936 private static class AnimationListenerWrapper implements AnimationListener { 3937 private final AnimationListener mWrapped; 3938 3939 private AnimationListenerWrapper(AnimationListener wrapped) { 3940 mWrapped = wrapped; 3941 } 3942 3943 @CallSuper 3944 @Override 3945 public void onAnimationStart(Animation animation) { 3946 if (mWrapped != null) { 3947 mWrapped.onAnimationStart(animation); 3948 } 3949 } 3950 3951 @CallSuper 3952 @Override 3953 public void onAnimationEnd(Animation animation) { 3954 if (mWrapped != null) { 3955 mWrapped.onAnimationEnd(animation); 3956 } 3957 } 3958 3959 @CallSuper 3960 @Override 3961 public void onAnimationRepeat(Animation animation) { 3962 if (mWrapped != null) { 3963 mWrapped.onAnimationRepeat(animation); 3964 } 3965 } 3966 } 3967 3968 /** 3969 * Reset the layer type to LAYER_TYPE_NONE at the end of an animation. 3970 */ 3971 private static class AnimateOnHWLayerIfNeededListener extends AnimationListenerWrapper { 3972 View mView; 3973 3974 AnimateOnHWLayerIfNeededListener(final View v, AnimationListener listener) { 3975 super(listener); 3976 mView = v; 3977 } 3978 3979 @Override 3980 @CallSuper 3981 public void onAnimationEnd(Animation animation) { 3982 // If we're attached to a window, assume we're in the normal performTraversals 3983 // drawing path for Animations running. It's not safe to change the layer type 3984 // during drawing, so post it to the View to run later. If we're not attached 3985 // or we're running on N and above, post it to the view. If we're not on N and 3986 // not attached, do it right now since existing platform versions don't run the 3987 // hwui renderer for detached views off the UI thread making changing layer type 3988 // safe, but posting may not be. 3989 // Prior to N posting to a detached view from a non-Looper thread could cause 3990 // leaks, since the thread-local run queue on a non-Looper thread would never 3991 // be flushed. 3992 if (ViewCompat.isAttachedToWindow(mView) || Build.VERSION.SDK_INT >= 24) { 3993 mView.post(new Runnable() { 3994 @Override 3995 public void run() { 3996 mView.setLayerType(View.LAYER_TYPE_NONE, null); 3997 } 3998 }); 3999 } else { 4000 mView.setLayerType(View.LAYER_TYPE_NONE, null); 4001 } 4002 super.onAnimationEnd(animation); 4003 } 4004 } 4005 4006 /** 4007 * Set the layer type to LAYER_TYPE_HARDWARE while an animator is running. 4008 */ 4009 private static class AnimatorOnHWLayerIfNeededListener extends AnimatorListenerAdapter { 4010 View mView; 4011 4012 AnimatorOnHWLayerIfNeededListener(final View v) { 4013 mView = v; 4014 } 4015 4016 @Override 4017 public void onAnimationStart(Animator animation) { 4018 mView.setLayerType(View.LAYER_TYPE_HARDWARE, null); 4019 } 4020 4021 @Override 4022 public void onAnimationEnd(Animator animation) { 4023 mView.setLayerType(View.LAYER_TYPE_NONE, null); 4024 animation.removeListener(this); 4025 } 4026 } 4027} 4028