FragmentManager.java revision 6b2208dce9a6c561848471608e1ab6188bba80db
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 android.content.Context; 20import android.content.res.Configuration; 21import android.os.Bundle; 22import android.os.Handler; 23import android.os.Looper; 24import android.os.Parcel; 25import android.os.Parcelable; 26import android.support.v4.util.DebugUtils; 27import android.support.v4.util.LogWriter; 28import android.util.Log; 29import android.util.SparseArray; 30import android.view.animation.AccelerateInterpolator; 31import android.view.animation.AlphaAnimation; 32import android.view.animation.Animation; 33import android.view.animation.AnimationSet; 34import android.view.animation.AnimationUtils; 35import android.view.animation.DecelerateInterpolator; 36import android.view.animation.Interpolator; 37import android.view.animation.ScaleAnimation; 38import android.view.animation.Animation.AnimationListener; 39import android.view.Menu; 40import android.view.MenuInflater; 41import android.view.MenuItem; 42import android.view.View; 43import android.view.ViewGroup; 44 45import java.io.FileDescriptor; 46import java.io.PrintWriter; 47import java.util.ArrayList; 48import java.util.Arrays; 49import java.util.List; 50 51/** 52 * Static library support version of the framework's {@link android.app.FragmentManager}. 53 * Used to write apps that run on platforms prior to Android 3.0. When running 54 * on Android 3.0 or above, this implementation is still used; it does not try 55 * to switch to the framework's implementation. See the framework {@link FragmentManager} 56 * documentation for a class overview. 57 * 58 * <p>Your activity must derive from {@link FragmentActivity} to use this. From such an activity, 59 * you can acquire the {@link FragmentManager} by calling 60 * {@link FragmentActivity#getSupportFragmentManager}. 61 */ 62public abstract class FragmentManager { 63 /** 64 * Representation of an entry on the fragment back stack, as created 65 * with {@link FragmentTransaction#addToBackStack(String) 66 * FragmentTransaction.addToBackStack()}. Entries can later be 67 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 68 * FragmentManager.getBackStackEntry()}. 69 * 70 * <p>Note that you should never hold on to a BackStackEntry object; 71 * the identifier as returned by {@link #getId} is the only thing that 72 * will be persisted across activity instances. 73 */ 74 public interface BackStackEntry { 75 /** 76 * Return the unique identifier for the entry. This is the only 77 * representation of the entry that will persist across activity 78 * instances. 79 */ 80 public int getId(); 81 82 /** 83 * Get the name that was supplied to 84 * {@link FragmentTransaction#addToBackStack(String) 85 * FragmentTransaction.addToBackStack(String)} when creating this entry. 86 */ 87 public String getName(); 88 89 /** 90 * Return the full bread crumb title resource identifier for the entry, 91 * or 0 if it does not have one. 92 */ 93 public int getBreadCrumbTitleRes(); 94 95 /** 96 * Return the short bread crumb title resource identifier for the entry, 97 * or 0 if it does not have one. 98 */ 99 public int getBreadCrumbShortTitleRes(); 100 101 /** 102 * Return the full bread crumb title for the entry, or null if it 103 * does not have one. 104 */ 105 public CharSequence getBreadCrumbTitle(); 106 107 /** 108 * Return the short bread crumb title for the entry, or null if it 109 * does not have one. 110 */ 111 public CharSequence getBreadCrumbShortTitle(); 112 } 113 114 /** 115 * Interface to watch for changes to the back stack. 116 */ 117 public interface OnBackStackChangedListener { 118 /** 119 * Called whenever the contents of the back stack change. 120 */ 121 public void onBackStackChanged(); 122 } 123 124 /** 125 * Start a series of edit operations on the Fragments associated with 126 * this FragmentManager. 127 * 128 * <p>Note: A fragment transaction can only be created/committed prior 129 * to an activity saving its state. If you try to commit a transaction 130 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 131 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 132 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 133 * This is because the framework takes care of saving your current fragments 134 * in the state, and if changes are made after the state is saved then they 135 * will be lost.</p> 136 */ 137 public abstract FragmentTransaction beginTransaction(); 138 139 /** @hide -- remove once prebuilts are in. */ 140 @Deprecated 141 public FragmentTransaction openTransaction() { 142 return beginTransaction(); 143 } 144 145 /** 146 * After a {@link FragmentTransaction} is committed with 147 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 148 * is scheduled to be executed asynchronously on the process's main thread. 149 * If you want to immediately executing any such pending operations, you 150 * can call this function (only from the main thread) to do so. Note that 151 * all callbacks and other related behavior will be done from within this 152 * call, so be careful about where this is called from. 153 * 154 * @return Returns true if there were any pending transactions to be 155 * executed. 156 */ 157 public abstract boolean executePendingTransactions(); 158 159 /** 160 * Finds a fragment that was identified by the given id either when inflated 161 * from XML or as the container ID when added in a transaction. This first 162 * searches through fragments that are currently added to the manager's 163 * activity; if no such fragment is found, then all fragments currently 164 * on the back stack associated with this ID are searched. 165 * @return The fragment if found or null otherwise. 166 */ 167 public abstract Fragment findFragmentById(int id); 168 169 /** 170 * Finds a fragment that was identified by the given tag either when inflated 171 * from XML or as supplied when added in a transaction. This first 172 * searches through fragments that are currently added to the manager's 173 * activity; if no such fragment is found, then all fragments currently 174 * on the back stack are searched. 175 * @return The fragment if found or null otherwise. 176 */ 177 public abstract Fragment findFragmentByTag(String tag); 178 179 /** 180 * Flag for {@link #popBackStack(String, int)} 181 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 182 * a back stack entry has been supplied, then all matching entries will 183 * be consumed until one that doesn't match is found or the bottom of 184 * the stack is reached. Otherwise, all entries up to but not including that entry 185 * will be removed. 186 */ 187 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 188 189 /** 190 * Pop the top state off the back stack. Returns true if there was one 191 * to pop, else false. This function is asynchronous -- it enqueues the 192 * request to pop, but the action will not be performed until the application 193 * returns to its event loop. 194 */ 195 public abstract void popBackStack(); 196 197 /** 198 * Like {@link #popBackStack()}, but performs the operation immediately 199 * inside of the call. This is like calling {@link #executePendingTransactions()} 200 * afterwards. 201 * @return Returns true if there was something popped, else false. 202 */ 203 public abstract boolean popBackStackImmediate(); 204 205 /** 206 * Pop the last fragment transition from the manager's fragment 207 * back stack. If there is nothing to pop, false is returned. 208 * This function is asynchronous -- it enqueues the 209 * request to pop, but the action will not be performed until the application 210 * returns to its event loop. 211 * 212 * @param name If non-null, this is the name of a previous back state 213 * to look for; if found, all states up to that state will be popped. The 214 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 215 * the named state itself is popped. If null, only the top state is popped. 216 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 217 */ 218 public abstract void popBackStack(String name, int flags); 219 220 /** 221 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 222 * inside of the call. This is like calling {@link #executePendingTransactions()} 223 * afterwards. 224 * @return Returns true if there was something popped, else false. 225 */ 226 public abstract boolean popBackStackImmediate(String name, int flags); 227 228 /** 229 * Pop all back stack states up to the one with the given identifier. 230 * This function is asynchronous -- it enqueues the 231 * request to pop, but the action will not be performed until the application 232 * returns to its event loop. 233 * 234 * @param id Identifier of the stated to be popped. If no identifier exists, 235 * false is returned. 236 * The identifier is the number returned by 237 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 238 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 239 * the named state itself is popped. 240 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 241 */ 242 public abstract void popBackStack(int id, int flags); 243 244 /** 245 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 246 * inside of the call. This is like calling {@link #executePendingTransactions()} 247 * afterwards. 248 * @return Returns true if there was something popped, else false. 249 */ 250 public abstract boolean popBackStackImmediate(int id, int flags); 251 252 /** 253 * Return the number of entries currently in the back stack. 254 */ 255 public abstract int getBackStackEntryCount(); 256 257 /** 258 * Return the BackStackEntry at index <var>index</var> in the back stack; 259 * entries start index 0 being the bottom of the stack. 260 */ 261 public abstract BackStackEntry getBackStackEntryAt(int index); 262 263 /** 264 * Add a new listener for changes to the fragment back stack. 265 */ 266 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 267 268 /** 269 * Remove a listener that was previously added with 270 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 271 */ 272 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 273 274 /** 275 * Put a reference to a fragment in a Bundle. This Bundle can be 276 * persisted as saved state, and when later restoring 277 * {@link #getFragment(Bundle, String)} will return the current 278 * instance of the same fragment. 279 * 280 * @param bundle The bundle in which to put the fragment reference. 281 * @param key The name of the entry in the bundle. 282 * @param fragment The Fragment whose reference is to be stored. 283 */ 284 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 285 286 /** 287 * Retrieve the current Fragment instance for a reference previously 288 * placed with {@link #putFragment(Bundle, String, Fragment)}. 289 * 290 * @param bundle The bundle from which to retrieve the fragment reference. 291 * @param key The name of the entry in the bundle. 292 * @return Returns the current Fragment instance that is associated with 293 * the given reference. 294 */ 295 public abstract Fragment getFragment(Bundle bundle, String key); 296 297 /** 298 * Get a list of all fragments that have been added to the fragment manager. 299 * 300 * @return The list of all fragments or null if none. 301 * @hide 302 */ 303 public abstract List<Fragment> getFragments(); 304 305 /** 306 * Save the current instance state of the given Fragment. This can be 307 * used later when creating a new instance of the Fragment and adding 308 * it to the fragment manager, to have it create itself to match the 309 * current state returned here. Note that there are limits on how 310 * this can be used: 311 * 312 * <ul> 313 * <li>The Fragment must currently be attached to the FragmentManager. 314 * <li>A new Fragment created using this saved state must be the same class 315 * type as the Fragment it was created from. 316 * <li>The saved state can not contain dependencies on other fragments -- 317 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 318 * store a fragment reference because that reference may not be valid when 319 * this saved state is later used. Likewise the Fragment's target and 320 * result code are not included in this state. 321 * </ul> 322 * 323 * @param f The Fragment whose state is to be saved. 324 * @return The generated state. This will be null if there was no 325 * interesting state created by the fragment. 326 */ 327 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 328 329 /** 330 * Returns true if the final {@link android.app.Activity#onDestroy() Activity.onDestroy()} 331 * call has been made on the FragmentManager's Activity, so this instance is now dead. 332 */ 333 public abstract boolean isDestroyed(); 334 335 /** 336 * Print the FragmentManager's state into the given stream. 337 * 338 * @param prefix Text to print at the front of each line. 339 * @param fd The raw file descriptor that the dump is being sent to. 340 * @param writer A PrintWriter to which the dump is to be set. 341 * @param args Additional arguments to the dump request. 342 */ 343 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 344 345 /** 346 * Control whether the framework's internal fragment manager debugging 347 * logs are turned on. If enabled, you will see output in logcat as 348 * the framework performs fragment operations. 349 */ 350 public static void enableDebugLogging(boolean enabled) { 351 FragmentManagerImpl.DEBUG = enabled; 352 } 353} 354 355final class FragmentManagerState implements Parcelable { 356 FragmentState[] mActive; 357 int[] mAdded; 358 BackStackState[] mBackStack; 359 360 public FragmentManagerState() { 361 } 362 363 public FragmentManagerState(Parcel in) { 364 mActive = in.createTypedArray(FragmentState.CREATOR); 365 mAdded = in.createIntArray(); 366 mBackStack = in.createTypedArray(BackStackState.CREATOR); 367 } 368 369 public int describeContents() { 370 return 0; 371 } 372 373 public void writeToParcel(Parcel dest, int flags) { 374 dest.writeTypedArray(mActive, flags); 375 dest.writeIntArray(mAdded); 376 dest.writeTypedArray(mBackStack, flags); 377 } 378 379 public static final Parcelable.Creator<FragmentManagerState> CREATOR 380 = new Parcelable.Creator<FragmentManagerState>() { 381 public FragmentManagerState createFromParcel(Parcel in) { 382 return new FragmentManagerState(in); 383 } 384 385 public FragmentManagerState[] newArray(int size) { 386 return new FragmentManagerState[size]; 387 } 388 }; 389} 390 391/** 392 * Callbacks from FragmentManagerImpl to its container. 393 */ 394interface FragmentContainer { 395 public View findViewById(int id); 396} 397 398/** 399 * Container for fragments associated with an activity. 400 */ 401final class FragmentManagerImpl extends FragmentManager { 402 static boolean DEBUG = false; 403 static final String TAG = "FragmentManager"; 404 405 static final boolean HONEYCOMB = android.os.Build.VERSION.SDK_INT >= 11; 406 407 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 408 static final String TARGET_STATE_TAG = "android:target_state"; 409 static final String VIEW_STATE_TAG = "android:view_state"; 410 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 411 412 ArrayList<Runnable> mPendingActions; 413 Runnable[] mTmpActions; 414 boolean mExecutingActions; 415 416 ArrayList<Fragment> mActive; 417 ArrayList<Fragment> mAdded; 418 ArrayList<Integer> mAvailIndices; 419 ArrayList<BackStackRecord> mBackStack; 420 ArrayList<Fragment> mCreatedMenus; 421 422 // Must be accessed while locked. 423 ArrayList<BackStackRecord> mBackStackIndices; 424 ArrayList<Integer> mAvailBackStackIndices; 425 426 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 427 428 int mCurState = Fragment.INITIALIZING; 429 FragmentActivity mActivity; 430 FragmentContainer mContainer; 431 Fragment mParent; 432 433 boolean mNeedMenuInvalidate; 434 boolean mStateSaved; 435 boolean mDestroyed; 436 String mNoTransactionsBecause; 437 boolean mHavePendingDeferredStart; 438 439 // Temporary vars for state save and restore. 440 Bundle mStateBundle = null; 441 SparseArray<Parcelable> mStateArray = null; 442 443 Runnable mExecCommit = new Runnable() { 444 @Override 445 public void run() { 446 execPendingActions(); 447 } 448 }; 449 450 private void throwException(RuntimeException ex) { 451 Log.e(TAG, ex.getMessage()); 452 Log.e(TAG, "Activity state:"); 453 LogWriter logw = new LogWriter(TAG); 454 PrintWriter pw = new PrintWriter(logw); 455 if (mActivity != null) { 456 try { 457 mActivity.dump(" ", null, pw, new String[] { }); 458 } catch (Exception e) { 459 Log.e(TAG, "Failed dumping state", e); 460 } 461 } else { 462 try { 463 dump(" ", null, pw, new String[] { }); 464 } catch (Exception e) { 465 Log.e(TAG, "Failed dumping state", e); 466 } 467 } 468 throw ex; 469 } 470 471 @Override 472 public FragmentTransaction beginTransaction() { 473 return new BackStackRecord(this); 474 } 475 476 @Override 477 public boolean executePendingTransactions() { 478 return execPendingActions(); 479 } 480 481 @Override 482 public void popBackStack() { 483 enqueueAction(new Runnable() { 484 @Override public void run() { 485 popBackStackState(mActivity.mHandler, null, -1, 0); 486 } 487 }, false); 488 } 489 490 @Override 491 public boolean popBackStackImmediate() { 492 checkStateLoss(); 493 executePendingTransactions(); 494 return popBackStackState(mActivity.mHandler, null, -1, 0); 495 } 496 497 @Override 498 public void popBackStack(final String name, final int flags) { 499 enqueueAction(new Runnable() { 500 @Override public void run() { 501 popBackStackState(mActivity.mHandler, name, -1, flags); 502 } 503 }, false); 504 } 505 506 @Override 507 public boolean popBackStackImmediate(String name, int flags) { 508 checkStateLoss(); 509 executePendingTransactions(); 510 return popBackStackState(mActivity.mHandler, name, -1, flags); 511 } 512 513 @Override 514 public void popBackStack(final int id, final int flags) { 515 if (id < 0) { 516 throw new IllegalArgumentException("Bad id: " + id); 517 } 518 enqueueAction(new Runnable() { 519 @Override public void run() { 520 popBackStackState(mActivity.mHandler, null, id, flags); 521 } 522 }, false); 523 } 524 525 @Override 526 public boolean popBackStackImmediate(int id, int flags) { 527 checkStateLoss(); 528 executePendingTransactions(); 529 if (id < 0) { 530 throw new IllegalArgumentException("Bad id: " + id); 531 } 532 return popBackStackState(mActivity.mHandler, null, id, flags); 533 } 534 535 @Override 536 public int getBackStackEntryCount() { 537 return mBackStack != null ? mBackStack.size() : 0; 538 } 539 540 @Override 541 public BackStackEntry getBackStackEntryAt(int index) { 542 return mBackStack.get(index); 543 } 544 545 @Override 546 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 547 if (mBackStackChangeListeners == null) { 548 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 549 } 550 mBackStackChangeListeners.add(listener); 551 } 552 553 @Override 554 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 555 if (mBackStackChangeListeners != null) { 556 mBackStackChangeListeners.remove(listener); 557 } 558 } 559 560 @Override 561 public void putFragment(Bundle bundle, String key, Fragment fragment) { 562 if (fragment.mIndex < 0) { 563 throwException(new IllegalStateException("Fragment " + fragment 564 + " is not currently in the FragmentManager")); 565 } 566 bundle.putInt(key, fragment.mIndex); 567 } 568 569 @Override 570 public Fragment getFragment(Bundle bundle, String key) { 571 int index = bundle.getInt(key, -1); 572 if (index == -1) { 573 return null; 574 } 575 if (index >= mActive.size()) { 576 throwException(new IllegalStateException("Fragment no longer exists for key " 577 + key + ": index " + index)); 578 } 579 Fragment f = mActive.get(index); 580 if (f == null) { 581 throwException(new IllegalStateException("Fragment no longer exists for key " 582 + key + ": index " + index)); 583 } 584 return f; 585 } 586 587 @Override 588 public List<Fragment> getFragments() { 589 return mActive; 590 } 591 592 @Override 593 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 594 if (fragment.mIndex < 0) { 595 throwException( new IllegalStateException("Fragment " + fragment 596 + " is not currently in the FragmentManager")); 597 } 598 if (fragment.mState > Fragment.INITIALIZING) { 599 Bundle result = saveFragmentBasicState(fragment); 600 return result != null ? new Fragment.SavedState(result) : null; 601 } 602 return null; 603 } 604 605 @Override 606 public boolean isDestroyed() { 607 return mDestroyed; 608 } 609 610 @Override 611 public String toString() { 612 StringBuilder sb = new StringBuilder(128); 613 sb.append("FragmentManager{"); 614 sb.append(Integer.toHexString(System.identityHashCode(this))); 615 sb.append(" in "); 616 if (mParent != null) { 617 DebugUtils.buildShortClassTag(mParent, sb); 618 } else { 619 DebugUtils.buildShortClassTag(mActivity, sb); 620 } 621 sb.append("}}"); 622 return sb.toString(); 623 } 624 625 @Override 626 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 627 String innerPrefix = prefix + " "; 628 629 int N; 630 if (mActive != null) { 631 N = mActive.size(); 632 if (N > 0) { 633 writer.print(prefix); writer.print("Active Fragments in "); 634 writer.print(Integer.toHexString(System.identityHashCode(this))); 635 writer.println(":"); 636 for (int i=0; i<N; i++) { 637 Fragment f = mActive.get(i); 638 writer.print(prefix); writer.print(" #"); writer.print(i); 639 writer.print(": "); writer.println(f); 640 if (f != null) { 641 f.dump(innerPrefix, fd, writer, args); 642 } 643 } 644 } 645 } 646 647 if (mAdded != null) { 648 N = mAdded.size(); 649 if (N > 0) { 650 writer.print(prefix); writer.println("Added Fragments:"); 651 for (int i=0; i<N; i++) { 652 Fragment f = mAdded.get(i); 653 writer.print(prefix); writer.print(" #"); writer.print(i); 654 writer.print(": "); writer.println(f.toString()); 655 } 656 } 657 } 658 659 if (mCreatedMenus != null) { 660 N = mCreatedMenus.size(); 661 if (N > 0) { 662 writer.print(prefix); writer.println("Fragments Created Menus:"); 663 for (int i=0; i<N; i++) { 664 Fragment f = mCreatedMenus.get(i); 665 writer.print(prefix); writer.print(" #"); writer.print(i); 666 writer.print(": "); writer.println(f.toString()); 667 } 668 } 669 } 670 671 if (mBackStack != null) { 672 N = mBackStack.size(); 673 if (N > 0) { 674 writer.print(prefix); writer.println("Back Stack:"); 675 for (int i=0; i<N; i++) { 676 BackStackRecord bs = mBackStack.get(i); 677 writer.print(prefix); writer.print(" #"); writer.print(i); 678 writer.print(": "); writer.println(bs.toString()); 679 bs.dump(innerPrefix, fd, writer, args); 680 } 681 } 682 } 683 684 synchronized (this) { 685 if (mBackStackIndices != null) { 686 N = mBackStackIndices.size(); 687 if (N > 0) { 688 writer.print(prefix); writer.println("Back Stack Indices:"); 689 for (int i=0; i<N; i++) { 690 BackStackRecord bs = mBackStackIndices.get(i); 691 writer.print(prefix); writer.print(" #"); writer.print(i); 692 writer.print(": "); writer.println(bs); 693 } 694 } 695 } 696 697 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 698 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 699 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 700 } 701 } 702 703 if (mPendingActions != null) { 704 N = mPendingActions.size(); 705 if (N > 0) { 706 writer.print(prefix); writer.println("Pending Actions:"); 707 for (int i=0; i<N; i++) { 708 Runnable r = mPendingActions.get(i); 709 writer.print(prefix); writer.print(" #"); writer.print(i); 710 writer.print(": "); writer.println(r); 711 } 712 } 713 } 714 715 writer.print(prefix); writer.println("FragmentManager misc state:"); 716 writer.print(prefix); writer.print(" mActivity="); writer.println(mActivity); 717 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 718 if (mParent != null) { 719 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 720 } 721 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 722 writer.print(" mStateSaved="); writer.print(mStateSaved); 723 writer.print(" mDestroyed="); writer.println(mDestroyed); 724 if (mNeedMenuInvalidate) { 725 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 726 writer.println(mNeedMenuInvalidate); 727 } 728 if (mNoTransactionsBecause != null) { 729 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 730 writer.println(mNoTransactionsBecause); 731 } 732 if (mAvailIndices != null && mAvailIndices.size() > 0) { 733 writer.print(prefix); writer.print(" mAvailIndices: "); 734 writer.println(Arrays.toString(mAvailIndices.toArray())); 735 } 736 } 737 738 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 739 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 740 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 741 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 742 743 static final int ANIM_DUR = 220; 744 745 static Animation makeOpenCloseAnimation(Context context, float startScale, 746 float endScale, float startAlpha, float endAlpha) { 747 AnimationSet set = new AnimationSet(false); 748 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 749 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 750 scale.setInterpolator(DECELERATE_QUINT); 751 scale.setDuration(ANIM_DUR); 752 set.addAnimation(scale); 753 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 754 alpha.setInterpolator(DECELERATE_CUBIC); 755 alpha.setDuration(ANIM_DUR); 756 set.addAnimation(alpha); 757 return set; 758 } 759 760 static Animation makeFadeAnimation(Context context, float start, float end) { 761 AlphaAnimation anim = new AlphaAnimation(start, end); 762 anim.setInterpolator(DECELERATE_CUBIC); 763 anim.setDuration(ANIM_DUR); 764 return anim; 765 } 766 767 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 768 int transitionStyle) { 769 Animation animObj = fragment.onCreateAnimation(transit, enter, 770 fragment.mNextAnim); 771 if (animObj != null) { 772 return animObj; 773 } 774 775 if (fragment.mNextAnim != 0) { 776 Animation anim = AnimationUtils.loadAnimation(mActivity, fragment.mNextAnim); 777 if (anim != null) { 778 return anim; 779 } 780 } 781 782 if (transit == 0) { 783 return null; 784 } 785 786 int styleIndex = transitToStyleIndex(transit, enter); 787 if (styleIndex < 0) { 788 return null; 789 } 790 791 switch (styleIndex) { 792 case ANIM_STYLE_OPEN_ENTER: 793 return makeOpenCloseAnimation(mActivity, 1.125f, 1.0f, 0, 1); 794 case ANIM_STYLE_OPEN_EXIT: 795 return makeOpenCloseAnimation(mActivity, 1.0f, .975f, 1, 0); 796 case ANIM_STYLE_CLOSE_ENTER: 797 return makeOpenCloseAnimation(mActivity, .975f, 1.0f, 0, 1); 798 case ANIM_STYLE_CLOSE_EXIT: 799 return makeOpenCloseAnimation(mActivity, 1.0f, 1.075f, 1, 0); 800 case ANIM_STYLE_FADE_ENTER: 801 return makeFadeAnimation(mActivity, 0, 1); 802 case ANIM_STYLE_FADE_EXIT: 803 return makeFadeAnimation(mActivity, 1, 0); 804 } 805 806 if (transitionStyle == 0 && mActivity.getWindow() != null) { 807 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 808 } 809 if (transitionStyle == 0) { 810 return null; 811 } 812 813 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 814 // com.android.internal.R.styleable.FragmentAnimation); 815 //int anim = attrs.getResourceId(styleIndex, 0); 816 //attrs.recycle(); 817 818 //if (anim == 0) { 819 // return null; 820 //} 821 822 //return AnimatorInflater.loadAnimator(mActivity, anim); 823 return null; 824 } 825 826 public void performPendingDeferredStart(Fragment f) { 827 if (f.mDeferStart) { 828 if (mExecutingActions) { 829 // Wait until we're done executing our pending transactions 830 mHavePendingDeferredStart = true; 831 return; 832 } 833 f.mDeferStart = false; 834 moveToState(f, mCurState, 0, 0, false); 835 } 836 } 837 838 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 839 boolean keepActive) { 840 // Fragments that are not currently added will sit in the onCreate() state. 841 if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) { 842 newState = Fragment.CREATED; 843 } 844 if (f.mRemoving && newState > f.mState) { 845 // While removing a fragment, we can't change it to a higher state. 846 newState = f.mState; 847 } 848 // Defer start if requested; don't allow it to move to STARTED or higher 849 // if it's not already started. 850 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 851 newState = Fragment.STOPPED; 852 } 853 if (f.mState < newState) { 854 // For fragments that are created from a layout, when restoring from 855 // state we don't want to allow them to be created until they are 856 // being reloaded from the layout. 857 if (f.mFromLayout && !f.mInLayout) { 858 return; 859 } 860 if (f.mAnimatingAway != null) { 861 // The fragment is currently being animated... but! Now we 862 // want to move our state back up. Give up on waiting for the 863 // animation, move to whatever the final state should be once 864 // the animation is done, and then we can proceed from there. 865 f.mAnimatingAway = null; 866 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 867 } 868 switch (f.mState) { 869 case Fragment.INITIALIZING: 870 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 871 if (f.mSavedFragmentState != null) { 872 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 873 FragmentManagerImpl.VIEW_STATE_TAG); 874 f.mTarget = getFragment(f.mSavedFragmentState, 875 FragmentManagerImpl.TARGET_STATE_TAG); 876 if (f.mTarget != null) { 877 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 878 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 879 } 880 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 881 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 882 if (!f.mUserVisibleHint) { 883 f.mDeferStart = true; 884 if (newState > Fragment.STOPPED) { 885 newState = Fragment.STOPPED; 886 } 887 } 888 } 889 f.mActivity = mActivity; 890 f.mParentFragment = mParent; 891 f.mFragmentManager = mParent != null 892 ? mParent.mChildFragmentManager : mActivity.mFragments; 893 f.mCalled = false; 894 f.onAttach(mActivity); 895 if (!f.mCalled) { 896 throw new SuperNotCalledException("Fragment " + f 897 + " did not call through to super.onAttach()"); 898 } 899 if (f.mParentFragment == null) { 900 mActivity.onAttachFragment(f); 901 } 902 903 if (!f.mRetaining) { 904 f.performCreate(f.mSavedFragmentState); 905 } 906 f.mRetaining = false; 907 if (f.mFromLayout) { 908 // For fragments that are part of the content view 909 // layout, we need to instantiate the view immediately 910 // and the inflater will take care of adding it. 911 f.mView = f.performCreateView(f.getLayoutInflater( 912 f.mSavedFragmentState), null, f.mSavedFragmentState); 913 if (f.mView != null) { 914 f.mInnerView = f.mView; 915 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 916 if (f.mHidden) f.mView.setVisibility(View.GONE); 917 f.onViewCreated(f.mView, f.mSavedFragmentState); 918 } else { 919 f.mInnerView = null; 920 } 921 } 922 case Fragment.CREATED: 923 if (newState > Fragment.CREATED) { 924 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 925 if (!f.mFromLayout) { 926 ViewGroup container = null; 927 if (f.mContainerId != 0) { 928 container = (ViewGroup)mContainer.findViewById(f.mContainerId); 929 if (container == null && !f.mRestored) { 930 throwException(new IllegalArgumentException( 931 "No view found for id 0x" 932 + Integer.toHexString(f.mContainerId) + " (" 933 + f.getResources().getResourceName(f.mContainerId) 934 + ") for fragment " + f)); 935 } 936 } 937 f.mContainer = container; 938 f.mView = f.performCreateView(f.getLayoutInflater( 939 f.mSavedFragmentState), container, f.mSavedFragmentState); 940 if (f.mView != null) { 941 f.mInnerView = f.mView; 942 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 943 if (container != null) { 944 Animation anim = loadAnimation(f, transit, true, 945 transitionStyle); 946 if (anim != null) { 947 f.mView.startAnimation(anim); 948 } 949 container.addView(f.mView); 950 } 951 if (f.mHidden) f.mView.setVisibility(View.GONE); 952 f.onViewCreated(f.mView, f.mSavedFragmentState); 953 } else { 954 f.mInnerView = null; 955 } 956 } 957 958 f.performActivityCreated(f.mSavedFragmentState); 959 if (f.mView != null) { 960 f.restoreViewState(f.mSavedFragmentState); 961 } 962 f.mSavedFragmentState = null; 963 } 964 case Fragment.ACTIVITY_CREATED: 965 case Fragment.STOPPED: 966 if (newState > Fragment.STOPPED) { 967 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 968 f.performStart(); 969 } 970 case Fragment.STARTED: 971 if (newState > Fragment.STARTED) { 972 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 973 f.mResumed = true; 974 f.performResume(); 975 f.mSavedFragmentState = null; 976 f.mSavedViewState = null; 977 } 978 } 979 } else if (f.mState > newState) { 980 switch (f.mState) { 981 case Fragment.RESUMED: 982 if (newState < Fragment.RESUMED) { 983 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 984 f.performPause(); 985 f.mResumed = false; 986 } 987 case Fragment.STARTED: 988 if (newState < Fragment.STARTED) { 989 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 990 f.performStop(); 991 } 992 case Fragment.STOPPED: 993 if (newState < Fragment.STOPPED) { 994 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 995 f.performReallyStop(); 996 } 997 case Fragment.ACTIVITY_CREATED: 998 if (newState < Fragment.ACTIVITY_CREATED) { 999 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 1000 if (f.mView != null) { 1001 // Need to save the current view state if not 1002 // done already. 1003 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 1004 saveFragmentViewState(f); 1005 } 1006 } 1007 f.performDestroyView(); 1008 if (f.mView != null && f.mContainer != null) { 1009 Animation anim = null; 1010 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 1011 anim = loadAnimation(f, transit, false, 1012 transitionStyle); 1013 } 1014 if (anim != null) { 1015 final Fragment fragment = f; 1016 f.mAnimatingAway = f.mView; 1017 f.mStateAfterAnimating = newState; 1018 anim.setAnimationListener(new AnimationListener() { 1019 @Override 1020 public void onAnimationEnd(Animation animation) { 1021 if (fragment.mAnimatingAway != null) { 1022 fragment.mAnimatingAway = null; 1023 moveToState(fragment, fragment.mStateAfterAnimating, 1024 0, 0, true); 1025 } 1026 } 1027 @Override 1028 public void onAnimationRepeat(Animation animation) { 1029 } 1030 @Override 1031 public void onAnimationStart(Animation animation) { 1032 } 1033 }); 1034 f.mView.startAnimation(anim); 1035 } 1036 f.mContainer.removeView(f.mView); 1037 } 1038 f.mContainer = null; 1039 f.mView = null; 1040 f.mInnerView = null; 1041 } 1042 case Fragment.CREATED: 1043 if (newState < Fragment.CREATED) { 1044 if (mDestroyed) { 1045 if (f.mAnimatingAway != null) { 1046 // The fragment's containing activity is 1047 // being destroyed, but this fragment is 1048 // currently animating away. Stop the 1049 // animation right now -- it is not needed, 1050 // and we can't wait any more on destroying 1051 // the fragment. 1052 View v = f.mAnimatingAway; 1053 f.mAnimatingAway = null; 1054 v.clearAnimation(); 1055 } 1056 } 1057 if (f.mAnimatingAway != null) { 1058 // We are waiting for the fragment's view to finish 1059 // animating away. Just make a note of the state 1060 // the fragment now should move to once the animation 1061 // is done. 1062 f.mStateAfterAnimating = newState; 1063 newState = Fragment.CREATED; 1064 } else { 1065 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1066 if (!f.mRetaining) { 1067 f.performDestroy(); 1068 } 1069 1070 f.mCalled = false; 1071 f.onDetach(); 1072 if (!f.mCalled) { 1073 throw new SuperNotCalledException("Fragment " + f 1074 + " did not call through to super.onDetach()"); 1075 } 1076 if (!keepActive) { 1077 if (!f.mRetaining) { 1078 makeInactive(f); 1079 } else { 1080 f.mActivity = null; 1081 f.mFragmentManager = null; 1082 } 1083 } 1084 } 1085 } 1086 } 1087 } 1088 1089 f.mState = newState; 1090 } 1091 1092 void moveToState(Fragment f) { 1093 moveToState(f, mCurState, 0, 0, false); 1094 } 1095 1096 void moveToState(int newState, boolean always) { 1097 moveToState(newState, 0, 0, always); 1098 } 1099 1100 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1101 if (mActivity == null && newState != Fragment.INITIALIZING) { 1102 throw new IllegalStateException("No activity"); 1103 } 1104 1105 if (!always && mCurState == newState) { 1106 return; 1107 } 1108 1109 mCurState = newState; 1110 if (mActive != null) { 1111 boolean loadersRunning = false; 1112 for (int i=0; i<mActive.size(); i++) { 1113 Fragment f = mActive.get(i); 1114 if (f != null) { 1115 moveToState(f, newState, transit, transitStyle, false); 1116 if (f.mLoaderManager != null) { 1117 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1118 } 1119 } 1120 } 1121 1122 if (!loadersRunning) { 1123 startPendingDeferredFragments(); 1124 } 1125 1126 if (mNeedMenuInvalidate && mActivity != null && mCurState == Fragment.RESUMED) { 1127 mActivity.supportInvalidateOptionsMenu(); 1128 mNeedMenuInvalidate = false; 1129 } 1130 } 1131 } 1132 1133 void startPendingDeferredFragments() { 1134 if (mActive == null) return; 1135 1136 for (int i=0; i<mActive.size(); i++) { 1137 Fragment f = mActive.get(i); 1138 if (f != null) { 1139 performPendingDeferredStart(f); 1140 } 1141 } 1142 } 1143 1144 void makeActive(Fragment f) { 1145 if (f.mIndex >= 0) { 1146 return; 1147 } 1148 1149 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1150 if (mActive == null) { 1151 mActive = new ArrayList<Fragment>(); 1152 } 1153 f.setIndex(mActive.size(), mParent); 1154 mActive.add(f); 1155 1156 } else { 1157 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent); 1158 mActive.set(f.mIndex, f); 1159 } 1160 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1161 } 1162 1163 void makeInactive(Fragment f) { 1164 if (f.mIndex < 0) { 1165 return; 1166 } 1167 1168 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1169 mActive.set(f.mIndex, null); 1170 if (mAvailIndices == null) { 1171 mAvailIndices = new ArrayList<Integer>(); 1172 } 1173 mAvailIndices.add(f.mIndex); 1174 mActivity.invalidateSupportFragment(f.mWho); 1175 f.initState(); 1176 } 1177 1178 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1179 if (mAdded == null) { 1180 mAdded = new ArrayList<Fragment>(); 1181 } 1182 if (DEBUG) Log.v(TAG, "add: " + fragment); 1183 makeActive(fragment); 1184 if (!fragment.mDetached) { 1185 if (mAdded.contains(fragment)) { 1186 throw new IllegalStateException("Fragment already added: " + fragment); 1187 } 1188 mAdded.add(fragment); 1189 fragment.mAdded = true; 1190 fragment.mRemoving = false; 1191 if (fragment.mHasMenu && fragment.mMenuVisible) { 1192 mNeedMenuInvalidate = true; 1193 } 1194 if (moveToStateNow) { 1195 moveToState(fragment); 1196 } 1197 } 1198 } 1199 1200 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1201 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1202 final boolean inactive = !fragment.isInBackStack(); 1203 if (!fragment.mDetached || inactive) { 1204 if (mAdded != null) { 1205 mAdded.remove(fragment); 1206 } 1207 if (fragment.mHasMenu && fragment.mMenuVisible) { 1208 mNeedMenuInvalidate = true; 1209 } 1210 fragment.mAdded = false; 1211 fragment.mRemoving = true; 1212 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1213 transition, transitionStyle, false); 1214 } 1215 } 1216 1217 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1218 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1219 if (!fragment.mHidden) { 1220 fragment.mHidden = true; 1221 if (fragment.mView != null) { 1222 Animation anim = loadAnimation(fragment, transition, false, 1223 transitionStyle); 1224 if (anim != null) { 1225 fragment.mView.startAnimation(anim); 1226 } 1227 fragment.mView.setVisibility(View.GONE); 1228 } 1229 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1230 mNeedMenuInvalidate = true; 1231 } 1232 fragment.onHiddenChanged(true); 1233 } 1234 } 1235 1236 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1237 if (DEBUG) Log.v(TAG, "show: " + fragment); 1238 if (fragment.mHidden) { 1239 fragment.mHidden = false; 1240 if (fragment.mView != null) { 1241 Animation anim = loadAnimation(fragment, transition, true, 1242 transitionStyle); 1243 if (anim != null) { 1244 fragment.mView.startAnimation(anim); 1245 } 1246 fragment.mView.setVisibility(View.VISIBLE); 1247 } 1248 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1249 mNeedMenuInvalidate = true; 1250 } 1251 fragment.onHiddenChanged(false); 1252 } 1253 } 1254 1255 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1256 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1257 if (!fragment.mDetached) { 1258 fragment.mDetached = true; 1259 if (fragment.mAdded) { 1260 // We are not already in back stack, so need to remove the fragment. 1261 if (mAdded != null) { 1262 if (DEBUG) Log.v(TAG, "remove from detach: " + fragment); 1263 mAdded.remove(fragment); 1264 } 1265 if (fragment.mHasMenu && fragment.mMenuVisible) { 1266 mNeedMenuInvalidate = true; 1267 } 1268 fragment.mAdded = false; 1269 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1270 } 1271 } 1272 } 1273 1274 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1275 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1276 if (fragment.mDetached) { 1277 fragment.mDetached = false; 1278 if (!fragment.mAdded) { 1279 if (mAdded == null) { 1280 mAdded = new ArrayList<Fragment>(); 1281 } 1282 if (mAdded.contains(fragment)) { 1283 throw new IllegalStateException("Fragment already added: " + fragment); 1284 } 1285 if (DEBUG) Log.v(TAG, "add from attach: " + fragment); 1286 mAdded.add(fragment); 1287 fragment.mAdded = true; 1288 if (fragment.mHasMenu && fragment.mMenuVisible) { 1289 mNeedMenuInvalidate = true; 1290 } 1291 moveToState(fragment, mCurState, transition, transitionStyle, false); 1292 } 1293 } 1294 } 1295 1296 public Fragment findFragmentById(int id) { 1297 if (mAdded != null) { 1298 // First look through added fragments. 1299 for (int i=mAdded.size()-1; i>=0; i--) { 1300 Fragment f = mAdded.get(i); 1301 if (f != null && f.mFragmentId == id) { 1302 return f; 1303 } 1304 } 1305 } 1306 if (mActive != null) { 1307 // Now for any known fragment. 1308 for (int i=mActive.size()-1; i>=0; i--) { 1309 Fragment f = mActive.get(i); 1310 if (f != null && f.mFragmentId == id) { 1311 return f; 1312 } 1313 } 1314 } 1315 return null; 1316 } 1317 1318 public Fragment findFragmentByTag(String tag) { 1319 if (mAdded != null && tag != null) { 1320 // First look through added fragments. 1321 for (int i=mAdded.size()-1; i>=0; i--) { 1322 Fragment f = mAdded.get(i); 1323 if (f != null && tag.equals(f.mTag)) { 1324 return f; 1325 } 1326 } 1327 } 1328 if (mActive != null && tag != null) { 1329 // Now for any known fragment. 1330 for (int i=mActive.size()-1; i>=0; i--) { 1331 Fragment f = mActive.get(i); 1332 if (f != null && tag.equals(f.mTag)) { 1333 return f; 1334 } 1335 } 1336 } 1337 return null; 1338 } 1339 1340 public Fragment findFragmentByWho(String who) { 1341 if (mActive != null && who != null) { 1342 for (int i=mActive.size()-1; i>=0; i--) { 1343 Fragment f = mActive.get(i); 1344 if (f != null && (f=f.findFragmentByWho(who)) != null) { 1345 return f; 1346 } 1347 } 1348 } 1349 return null; 1350 } 1351 1352 private void checkStateLoss() { 1353 if (mStateSaved) { 1354 throw new IllegalStateException( 1355 "Can not perform this action after onSaveInstanceState"); 1356 } 1357 if (mNoTransactionsBecause != null) { 1358 throw new IllegalStateException( 1359 "Can not perform this action inside of " + mNoTransactionsBecause); 1360 } 1361 } 1362 1363 /** 1364 * Adds an action to the queue of pending actions. 1365 * 1366 * @param action the action to add 1367 * @param allowStateLoss whether to allow loss of state information 1368 * @throws IllegalStateException if the activity has been destroyed 1369 */ 1370 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1371 if (!allowStateLoss) { 1372 checkStateLoss(); 1373 } 1374 synchronized (this) { 1375 if (mDestroyed || mActivity == null) { 1376 throw new IllegalStateException("Activity has been destroyed"); 1377 } 1378 if (mPendingActions == null) { 1379 mPendingActions = new ArrayList<Runnable>(); 1380 } 1381 mPendingActions.add(action); 1382 if (mPendingActions.size() == 1) { 1383 mActivity.mHandler.removeCallbacks(mExecCommit); 1384 mActivity.mHandler.post(mExecCommit); 1385 } 1386 } 1387 } 1388 1389 public int allocBackStackIndex(BackStackRecord bse) { 1390 synchronized (this) { 1391 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1392 if (mBackStackIndices == null) { 1393 mBackStackIndices = new ArrayList<BackStackRecord>(); 1394 } 1395 int index = mBackStackIndices.size(); 1396 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1397 mBackStackIndices.add(bse); 1398 return index; 1399 1400 } else { 1401 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1402 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1403 mBackStackIndices.set(index, bse); 1404 return index; 1405 } 1406 } 1407 } 1408 1409 public void setBackStackIndex(int index, BackStackRecord bse) { 1410 synchronized (this) { 1411 if (mBackStackIndices == null) { 1412 mBackStackIndices = new ArrayList<BackStackRecord>(); 1413 } 1414 int N = mBackStackIndices.size(); 1415 if (index < N) { 1416 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1417 mBackStackIndices.set(index, bse); 1418 } else { 1419 while (N < index) { 1420 mBackStackIndices.add(null); 1421 if (mAvailBackStackIndices == null) { 1422 mAvailBackStackIndices = new ArrayList<Integer>(); 1423 } 1424 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1425 mAvailBackStackIndices.add(N); 1426 N++; 1427 } 1428 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1429 mBackStackIndices.add(bse); 1430 } 1431 } 1432 } 1433 1434 public void freeBackStackIndex(int index) { 1435 synchronized (this) { 1436 mBackStackIndices.set(index, null); 1437 if (mAvailBackStackIndices == null) { 1438 mAvailBackStackIndices = new ArrayList<Integer>(); 1439 } 1440 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1441 mAvailBackStackIndices.add(index); 1442 } 1443 } 1444 1445 /** 1446 * Only call from main thread! 1447 */ 1448 public boolean execPendingActions() { 1449 if (mExecutingActions) { 1450 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1451 } 1452 1453 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1454 throw new IllegalStateException("Must be called from main thread of process"); 1455 } 1456 1457 boolean didSomething = false; 1458 1459 while (true) { 1460 int numActions; 1461 1462 synchronized (this) { 1463 if (mPendingActions == null || mPendingActions.size() == 0) { 1464 break; 1465 } 1466 1467 numActions = mPendingActions.size(); 1468 if (mTmpActions == null || mTmpActions.length < numActions) { 1469 mTmpActions = new Runnable[numActions]; 1470 } 1471 mPendingActions.toArray(mTmpActions); 1472 mPendingActions.clear(); 1473 mActivity.mHandler.removeCallbacks(mExecCommit); 1474 } 1475 1476 mExecutingActions = true; 1477 for (int i=0; i<numActions; i++) { 1478 mTmpActions[i].run(); 1479 mTmpActions[i] = null; 1480 } 1481 mExecutingActions = false; 1482 didSomething = true; 1483 } 1484 1485 if (mHavePendingDeferredStart) { 1486 boolean loadersRunning = false; 1487 for (int i=0; i<mActive.size(); i++) { 1488 Fragment f = mActive.get(i); 1489 if (f != null && f.mLoaderManager != null) { 1490 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1491 } 1492 } 1493 if (!loadersRunning) { 1494 mHavePendingDeferredStart = false; 1495 startPendingDeferredFragments(); 1496 } 1497 } 1498 return didSomething; 1499 } 1500 1501 void reportBackStackChanged() { 1502 if (mBackStackChangeListeners != null) { 1503 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1504 mBackStackChangeListeners.get(i).onBackStackChanged(); 1505 } 1506 } 1507 } 1508 1509 void addBackStackState(BackStackRecord state) { 1510 if (mBackStack == null) { 1511 mBackStack = new ArrayList<BackStackRecord>(); 1512 } 1513 mBackStack.add(state); 1514 reportBackStackChanged(); 1515 } 1516 1517 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1518 if (mBackStack == null) { 1519 return false; 1520 } 1521 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1522 int last = mBackStack.size()-1; 1523 if (last < 0) { 1524 return false; 1525 } 1526 final BackStackRecord bss = mBackStack.remove(last); 1527 bss.popFromBackStack(true); 1528 reportBackStackChanged(); 1529 } else { 1530 int index = -1; 1531 if (name != null || id >= 0) { 1532 // If a name or ID is specified, look for that place in 1533 // the stack. 1534 index = mBackStack.size()-1; 1535 while (index >= 0) { 1536 BackStackRecord bss = mBackStack.get(index); 1537 if (name != null && name.equals(bss.getName())) { 1538 break; 1539 } 1540 if (id >= 0 && id == bss.mIndex) { 1541 break; 1542 } 1543 index--; 1544 } 1545 if (index < 0) { 1546 return false; 1547 } 1548 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1549 index--; 1550 // Consume all following entries that match. 1551 while (index >= 0) { 1552 BackStackRecord bss = mBackStack.get(index); 1553 if ((name != null && name.equals(bss.getName())) 1554 || (id >= 0 && id == bss.mIndex)) { 1555 index--; 1556 continue; 1557 } 1558 break; 1559 } 1560 } 1561 } 1562 if (index == mBackStack.size()-1) { 1563 return false; 1564 } 1565 final ArrayList<BackStackRecord> states 1566 = new ArrayList<BackStackRecord>(); 1567 for (int i=mBackStack.size()-1; i>index; i--) { 1568 states.add(mBackStack.remove(i)); 1569 } 1570 final int LAST = states.size()-1; 1571 for (int i=0; i<=LAST; i++) { 1572 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1573 states.get(i).popFromBackStack(i == LAST); 1574 } 1575 reportBackStackChanged(); 1576 } 1577 return true; 1578 } 1579 1580 ArrayList<Fragment> retainNonConfig() { 1581 ArrayList<Fragment> fragments = null; 1582 if (mActive != null) { 1583 for (int i=0; i<mActive.size(); i++) { 1584 Fragment f = mActive.get(i); 1585 if (f != null && f.mRetainInstance) { 1586 if (fragments == null) { 1587 fragments = new ArrayList<Fragment>(); 1588 } 1589 fragments.add(f); 1590 f.mRetaining = true; 1591 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1592 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1593 } 1594 } 1595 } 1596 return fragments; 1597 } 1598 1599 void saveFragmentViewState(Fragment f) { 1600 if (f.mInnerView == null) { 1601 return; 1602 } 1603 if (mStateArray == null) { 1604 mStateArray = new SparseArray<Parcelable>(); 1605 } else { 1606 mStateArray.clear(); 1607 } 1608 f.mInnerView.saveHierarchyState(mStateArray); 1609 if (mStateArray.size() > 0) { 1610 f.mSavedViewState = mStateArray; 1611 mStateArray = null; 1612 } 1613 } 1614 1615 Bundle saveFragmentBasicState(Fragment f) { 1616 Bundle result = null; 1617 1618 if (mStateBundle == null) { 1619 mStateBundle = new Bundle(); 1620 } 1621 f.performSaveInstanceState(mStateBundle); 1622 if (!mStateBundle.isEmpty()) { 1623 result = mStateBundle; 1624 mStateBundle = null; 1625 } 1626 1627 if (f.mView != null) { 1628 saveFragmentViewState(f); 1629 } 1630 if (f.mSavedViewState != null) { 1631 if (result == null) { 1632 result = new Bundle(); 1633 } 1634 result.putSparseParcelableArray( 1635 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1636 } 1637 if (!f.mUserVisibleHint) { 1638 if (result == null) { 1639 result = new Bundle(); 1640 } 1641 // Only add this if it's not the default value 1642 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1643 } 1644 1645 return result; 1646 } 1647 1648 Parcelable saveAllState() { 1649 // Make sure all pending operations have now been executed to get 1650 // our state update-to-date. 1651 execPendingActions(); 1652 1653 if (HONEYCOMB) { 1654 // As of Honeycomb, we save state after pausing. Prior to that 1655 // it is before pausing. With fragments this is an issue, since 1656 // there are many things you may do after pausing but before 1657 // stopping that change the fragment state. For those older 1658 // devices, we will not at this point say that we have saved 1659 // the state, so we will allow them to continue doing fragment 1660 // transactions. This retains the same semantics as Honeycomb, 1661 // though you do have the risk of losing the very most recent state 1662 // if the process is killed... we'll live with that. 1663 mStateSaved = true; 1664 } 1665 1666 if (mActive == null || mActive.size() <= 0) { 1667 return null; 1668 } 1669 1670 // First collect all active fragments. 1671 int N = mActive.size(); 1672 FragmentState[] active = new FragmentState[N]; 1673 boolean haveFragments = false; 1674 for (int i=0; i<N; i++) { 1675 Fragment f = mActive.get(i); 1676 if (f != null) { 1677 if (f.mIndex < 0) { 1678 throwException(new IllegalStateException( 1679 "Failure saving state: active " + f 1680 + " has cleared index: " + f.mIndex)); 1681 } 1682 1683 haveFragments = true; 1684 1685 FragmentState fs = new FragmentState(f); 1686 active[i] = fs; 1687 1688 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1689 fs.mSavedFragmentState = saveFragmentBasicState(f); 1690 1691 if (f.mTarget != null) { 1692 if (f.mTarget.mIndex < 0) { 1693 throwException(new IllegalStateException( 1694 "Failure saving state: " + f 1695 + " has target not in fragment manager: " + f.mTarget)); 1696 } 1697 if (fs.mSavedFragmentState == null) { 1698 fs.mSavedFragmentState = new Bundle(); 1699 } 1700 putFragment(fs.mSavedFragmentState, 1701 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1702 if (f.mTargetRequestCode != 0) { 1703 fs.mSavedFragmentState.putInt( 1704 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1705 f.mTargetRequestCode); 1706 } 1707 } 1708 1709 } else { 1710 fs.mSavedFragmentState = f.mSavedFragmentState; 1711 } 1712 1713 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1714 + fs.mSavedFragmentState); 1715 } 1716 } 1717 1718 if (!haveFragments) { 1719 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1720 return null; 1721 } 1722 1723 int[] added = null; 1724 BackStackState[] backStack = null; 1725 1726 // Build list of currently added fragments. 1727 if (mAdded != null) { 1728 N = mAdded.size(); 1729 if (N > 0) { 1730 added = new int[N]; 1731 for (int i=0; i<N; i++) { 1732 added[i] = mAdded.get(i).mIndex; 1733 if (added[i] < 0) { 1734 throwException(new IllegalStateException( 1735 "Failure saving state: active " + mAdded.get(i) 1736 + " has cleared index: " + added[i])); 1737 } 1738 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1739 + ": " + mAdded.get(i)); 1740 } 1741 } 1742 } 1743 1744 // Now save back stack. 1745 if (mBackStack != null) { 1746 N = mBackStack.size(); 1747 if (N > 0) { 1748 backStack = new BackStackState[N]; 1749 for (int i=0; i<N; i++) { 1750 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1751 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1752 + ": " + mBackStack.get(i)); 1753 } 1754 } 1755 } 1756 1757 FragmentManagerState fms = new FragmentManagerState(); 1758 fms.mActive = active; 1759 fms.mAdded = added; 1760 fms.mBackStack = backStack; 1761 return fms; 1762 } 1763 1764 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1765 // If there is no saved state at all, then there can not be 1766 // any nonConfig fragments either, so that is that. 1767 if (state == null) return; 1768 FragmentManagerState fms = (FragmentManagerState)state; 1769 if (fms.mActive == null) return; 1770 1771 // First re-attach any non-config instances we are retaining back 1772 // to their saved state, so we don't try to instantiate them again. 1773 if (nonConfig != null) { 1774 for (int i=0; i<nonConfig.size(); i++) { 1775 Fragment f = nonConfig.get(i); 1776 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1777 FragmentState fs = fms.mActive[f.mIndex]; 1778 fs.mInstance = f; 1779 f.mSavedViewState = null; 1780 f.mBackStackNesting = 0; 1781 f.mInLayout = false; 1782 f.mAdded = false; 1783 f.mTarget = null; 1784 if (fs.mSavedFragmentState != null) { 1785 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1786 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1787 FragmentManagerImpl.VIEW_STATE_TAG); 1788 } 1789 } 1790 } 1791 1792 // Build the full list of active fragments, instantiating them from 1793 // their saved state. 1794 mActive = new ArrayList<Fragment>(fms.mActive.length); 1795 if (mAvailIndices != null) { 1796 mAvailIndices.clear(); 1797 } 1798 for (int i=0; i<fms.mActive.length; i++) { 1799 FragmentState fs = fms.mActive[i]; 1800 if (fs != null) { 1801 Fragment f = fs.instantiate(mActivity, mParent); 1802 if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); 1803 mActive.add(f); 1804 // Now that the fragment is instantiated (or came from being 1805 // retained above), clear mInstance in case we end up re-restoring 1806 // from this FragmentState again. 1807 fs.mInstance = null; 1808 } else { 1809 mActive.add(null); 1810 if (mAvailIndices == null) { 1811 mAvailIndices = new ArrayList<Integer>(); 1812 } 1813 if (DEBUG) Log.v(TAG, "restoreAllState: avail #" + i); 1814 mAvailIndices.add(i); 1815 } 1816 } 1817 1818 // Update the target of all retained fragments. 1819 if (nonConfig != null) { 1820 for (int i=0; i<nonConfig.size(); i++) { 1821 Fragment f = nonConfig.get(i); 1822 if (f.mTargetIndex >= 0) { 1823 if (f.mTargetIndex < mActive.size()) { 1824 f.mTarget = mActive.get(f.mTargetIndex); 1825 } else { 1826 Log.w(TAG, "Re-attaching retained fragment " + f 1827 + " target no longer exists: " + f.mTargetIndex); 1828 f.mTarget = null; 1829 } 1830 } 1831 } 1832 } 1833 1834 // Build the list of currently added fragments. 1835 if (fms.mAdded != null) { 1836 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1837 for (int i=0; i<fms.mAdded.length; i++) { 1838 Fragment f = mActive.get(fms.mAdded[i]); 1839 if (f == null) { 1840 throwException(new IllegalStateException( 1841 "No instantiated fragment for index #" + fms.mAdded[i])); 1842 } 1843 f.mAdded = true; 1844 if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); 1845 if (mAdded.contains(f)) { 1846 throw new IllegalStateException("Already added!"); 1847 } 1848 mAdded.add(f); 1849 } 1850 } else { 1851 mAdded = null; 1852 } 1853 1854 // Build the back stack. 1855 if (fms.mBackStack != null) { 1856 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1857 for (int i=0; i<fms.mBackStack.length; i++) { 1858 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1859 if (DEBUG) { 1860 Log.v(TAG, "restoreAllState: back stack #" + i 1861 + " (index " + bse.mIndex + "): " + bse); 1862 LogWriter logw = new LogWriter(TAG); 1863 PrintWriter pw = new PrintWriter(logw); 1864 bse.dump(" ", pw, false); 1865 } 1866 mBackStack.add(bse); 1867 if (bse.mIndex >= 0) { 1868 setBackStackIndex(bse.mIndex, bse); 1869 } 1870 } 1871 } else { 1872 mBackStack = null; 1873 } 1874 } 1875 1876 public void attachActivity(FragmentActivity activity, 1877 FragmentContainer container, Fragment parent) { 1878 if (mActivity != null) throw new IllegalStateException("Already attached"); 1879 mActivity = activity; 1880 mContainer = container; 1881 mParent = parent; 1882 } 1883 1884 public void noteStateNotSaved() { 1885 mStateSaved = false; 1886 } 1887 1888 public void dispatchCreate() { 1889 mStateSaved = false; 1890 moveToState(Fragment.CREATED, false); 1891 } 1892 1893 public void dispatchActivityCreated() { 1894 mStateSaved = false; 1895 moveToState(Fragment.ACTIVITY_CREATED, false); 1896 } 1897 1898 public void dispatchStart() { 1899 mStateSaved = false; 1900 moveToState(Fragment.STARTED, false); 1901 } 1902 1903 public void dispatchResume() { 1904 mStateSaved = false; 1905 moveToState(Fragment.RESUMED, false); 1906 } 1907 1908 public void dispatchPause() { 1909 moveToState(Fragment.STARTED, false); 1910 } 1911 1912 public void dispatchStop() { 1913 // See saveAllState() for the explanation of this. We do this for 1914 // all platform versions, to keep our behavior more consistent between 1915 // them. 1916 mStateSaved = true; 1917 1918 moveToState(Fragment.STOPPED, false); 1919 } 1920 1921 public void dispatchReallyStop() { 1922 moveToState(Fragment.ACTIVITY_CREATED, false); 1923 } 1924 1925 public void dispatchDestroyView() { 1926 moveToState(Fragment.CREATED, false); 1927 } 1928 1929 public void dispatchDestroy() { 1930 mDestroyed = true; 1931 execPendingActions(); 1932 moveToState(Fragment.INITIALIZING, false); 1933 mActivity = null; 1934 mContainer = null; 1935 mParent = null; 1936 } 1937 1938 public void dispatchConfigurationChanged(Configuration newConfig) { 1939 if (mAdded != null) { 1940 for (int i=0; i<mAdded.size(); i++) { 1941 Fragment f = mAdded.get(i); 1942 if (f != null) { 1943 f.performConfigurationChanged(newConfig); 1944 } 1945 } 1946 } 1947 } 1948 1949 public void dispatchLowMemory() { 1950 if (mAdded != null) { 1951 for (int i=0; i<mAdded.size(); i++) { 1952 Fragment f = mAdded.get(i); 1953 if (f != null) { 1954 f.performLowMemory(); 1955 } 1956 } 1957 } 1958 } 1959 1960 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1961 boolean show = false; 1962 ArrayList<Fragment> newMenus = null; 1963 if (mAdded != null) { 1964 for (int i=0; i<mAdded.size(); i++) { 1965 Fragment f = mAdded.get(i); 1966 if (f != null) { 1967 if (f.performCreateOptionsMenu(menu, inflater)) { 1968 show = true; 1969 if (newMenus == null) { 1970 newMenus = new ArrayList<Fragment>(); 1971 } 1972 newMenus.add(f); 1973 } 1974 } 1975 } 1976 } 1977 1978 if (mCreatedMenus != null) { 1979 for (int i=0; i<mCreatedMenus.size(); i++) { 1980 Fragment f = mCreatedMenus.get(i); 1981 if (newMenus == null || !newMenus.contains(f)) { 1982 f.onDestroyOptionsMenu(); 1983 } 1984 } 1985 } 1986 1987 mCreatedMenus = newMenus; 1988 1989 return show; 1990 } 1991 1992 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1993 boolean show = false; 1994 if (mAdded != null) { 1995 for (int i=0; i<mAdded.size(); i++) { 1996 Fragment f = mAdded.get(i); 1997 if (f != null) { 1998 if (f.performPrepareOptionsMenu(menu)) { 1999 show = true; 2000 } 2001 } 2002 } 2003 } 2004 return show; 2005 } 2006 2007 public boolean dispatchOptionsItemSelected(MenuItem item) { 2008 if (mAdded != null) { 2009 for (int i=0; i<mAdded.size(); i++) { 2010 Fragment f = mAdded.get(i); 2011 if (f != null) { 2012 if (f.performOptionsItemSelected(item)) { 2013 return true; 2014 } 2015 } 2016 } 2017 } 2018 return false; 2019 } 2020 2021 public boolean dispatchContextItemSelected(MenuItem item) { 2022 if (mAdded != null) { 2023 for (int i=0; i<mAdded.size(); i++) { 2024 Fragment f = mAdded.get(i); 2025 if (f != null) { 2026 if (f.performContextItemSelected(item)) { 2027 return true; 2028 } 2029 } 2030 } 2031 } 2032 return false; 2033 } 2034 2035 public void dispatchOptionsMenuClosed(Menu menu) { 2036 if (mAdded != null) { 2037 for (int i=0; i<mAdded.size(); i++) { 2038 Fragment f = mAdded.get(i); 2039 if (f != null) { 2040 f.performOptionsMenuClosed(menu); 2041 } 2042 } 2043 } 2044 } 2045 2046 public static int reverseTransit(int transit) { 2047 int rev = 0; 2048 switch (transit) { 2049 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2050 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 2051 break; 2052 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2053 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 2054 break; 2055 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2056 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 2057 break; 2058 } 2059 return rev; 2060 2061 } 2062 2063 public static final int ANIM_STYLE_OPEN_ENTER = 1; 2064 public static final int ANIM_STYLE_OPEN_EXIT = 2; 2065 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 2066 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 2067 public static final int ANIM_STYLE_FADE_ENTER = 5; 2068 public static final int ANIM_STYLE_FADE_EXIT = 6; 2069 2070 public static int transitToStyleIndex(int transit, boolean enter) { 2071 int animAttr = -1; 2072 switch (transit) { 2073 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2074 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 2075 break; 2076 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2077 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 2078 break; 2079 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2080 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 2081 break; 2082 } 2083 return animAttr; 2084 } 2085} 2086