FragmentManager.java revision 410d77a6fbe42b0784cccd046bb8958caa723035
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.content.res.TypedArray; 22import android.os.Build; 23import android.os.Bundle; 24import android.os.Handler; 25import android.os.Looper; 26import android.os.Parcel; 27import android.os.Parcelable; 28import android.support.annotation.CallSuper; 29import android.support.annotation.IdRes; 30import android.support.annotation.StringRes; 31import android.support.v4.util.DebugUtils; 32import android.support.v4.util.LogWriter; 33import android.support.v4.view.LayoutInflaterFactory; 34import android.support.v4.view.ViewCompat; 35import android.util.AttributeSet; 36import android.util.Log; 37import android.util.SparseArray; 38import android.view.animation.AccelerateInterpolator; 39import android.view.animation.AlphaAnimation; 40import android.view.animation.Animation; 41import android.view.animation.AnimationSet; 42import android.view.animation.AnimationUtils; 43import android.view.animation.DecelerateInterpolator; 44import android.view.animation.Interpolator; 45import android.view.animation.ScaleAnimation; 46import android.view.animation.Animation.AnimationListener; 47import android.view.Menu; 48import android.view.MenuInflater; 49import android.view.MenuItem; 50import android.view.View; 51import android.view.ViewGroup; 52 53import java.io.FileDescriptor; 54import java.io.PrintWriter; 55import java.lang.reflect.Field; 56import java.util.ArrayList; 57import java.util.Arrays; 58import java.util.List; 59 60/** 61 * Static library support version of the framework's {@link android.app.FragmentManager}. 62 * Used to write apps that run on platforms prior to Android 3.0. When running 63 * on Android 3.0 or above, this implementation is still used; it does not try 64 * to switch to the framework's implementation. See the framework {@link FragmentManager} 65 * documentation for a class overview. 66 * 67 * <p>Your activity must derive from {@link FragmentActivity} to use this. From such an activity, 68 * you can acquire the {@link FragmentManager} by calling 69 * {@link FragmentActivity#getSupportFragmentManager}. 70 */ 71public abstract class FragmentManager { 72 /** 73 * Representation of an entry on the fragment back stack, as created 74 * with {@link FragmentTransaction#addToBackStack(String) 75 * FragmentTransaction.addToBackStack()}. Entries can later be 76 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 77 * FragmentManager.getBackStackEntry()}. 78 * 79 * <p>Note that you should never hold on to a BackStackEntry object; 80 * the identifier as returned by {@link #getId} is the only thing that 81 * will be persisted across activity instances. 82 */ 83 public interface BackStackEntry { 84 /** 85 * Return the unique identifier for the entry. This is the only 86 * representation of the entry that will persist across activity 87 * instances. 88 */ 89 public int getId(); 90 91 /** 92 * Get the name that was supplied to 93 * {@link FragmentTransaction#addToBackStack(String) 94 * FragmentTransaction.addToBackStack(String)} when creating this entry. 95 */ 96 public String getName(); 97 98 /** 99 * Return the full bread crumb title resource identifier for the entry, 100 * or 0 if it does not have one. 101 */ 102 @StringRes 103 public int getBreadCrumbTitleRes(); 104 105 /** 106 * Return the short bread crumb title resource identifier for the entry, 107 * or 0 if it does not have one. 108 */ 109 @StringRes 110 public int getBreadCrumbShortTitleRes(); 111 112 /** 113 * Return the full bread crumb title for the entry, or null if it 114 * does not have one. 115 */ 116 public CharSequence getBreadCrumbTitle(); 117 118 /** 119 * Return the short bread crumb title for the entry, or null if it 120 * does not have one. 121 */ 122 public CharSequence getBreadCrumbShortTitle(); 123 } 124 125 /** 126 * Interface to watch for changes to the back stack. 127 */ 128 public interface OnBackStackChangedListener { 129 /** 130 * Called whenever the contents of the back stack change. 131 */ 132 public void onBackStackChanged(); 133 } 134 135 /** 136 * Start a series of edit operations on the Fragments associated with 137 * this FragmentManager. 138 * 139 * <p>Note: A fragment transaction can only be created/committed prior 140 * to an activity saving its state. If you try to commit a transaction 141 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 142 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 143 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 144 * This is because the framework takes care of saving your current fragments 145 * in the state, and if changes are made after the state is saved then they 146 * will be lost.</p> 147 */ 148 public abstract FragmentTransaction beginTransaction(); 149 150 /** @hide -- remove once prebuilts are in. */ 151 @Deprecated 152 public FragmentTransaction openTransaction() { 153 return beginTransaction(); 154 } 155 156 /** 157 * After a {@link FragmentTransaction} is committed with 158 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 159 * is scheduled to be executed asynchronously on the process's main thread. 160 * If you want to immediately executing any such pending operations, you 161 * can call this function (only from the main thread) to do so. Note that 162 * all callbacks and other related behavior will be done from within this 163 * call, so be careful about where this is called from. 164 * 165 * @return Returns true if there were any pending transactions to be 166 * executed. 167 */ 168 public abstract boolean executePendingTransactions(); 169 170 /** 171 * Finds a fragment that was identified by the given id either when inflated 172 * from XML or as the container ID when added in a transaction. This first 173 * searches through fragments that are currently added to the manager's 174 * activity; if no such fragment is found, then all fragments currently 175 * on the back stack associated with this ID are searched. 176 * @return The fragment if found or null otherwise. 177 */ 178 public abstract Fragment findFragmentById(@IdRes int id); 179 180 /** 181 * Finds a fragment that was identified by the given tag either when inflated 182 * from XML or as supplied when added in a transaction. This first 183 * searches through fragments that are currently added to the manager's 184 * activity; if no such fragment is found, then all fragments currently 185 * on the back stack are searched. 186 * @return The fragment if found or null otherwise. 187 */ 188 public abstract Fragment findFragmentByTag(String tag); 189 190 /** 191 * Flag for {@link #popBackStack(String, int)} 192 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 193 * a back stack entry has been supplied, then all matching entries will 194 * be consumed until one that doesn't match is found or the bottom of 195 * the stack is reached. Otherwise, all entries up to but not including that entry 196 * will be removed. 197 */ 198 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 199 200 /** 201 * Pop the top state off the back stack. Returns true if there was one 202 * to pop, else false. This function is asynchronous -- it enqueues the 203 * request to pop, but the action will not be performed until the application 204 * returns to its event loop. 205 */ 206 public abstract void popBackStack(); 207 208 /** 209 * Like {@link #popBackStack()}, but performs the operation immediately 210 * inside of the call. This is like calling {@link #executePendingTransactions()} 211 * afterwards. 212 * @return Returns true if there was something popped, else false. 213 */ 214 public abstract boolean popBackStackImmediate(); 215 216 /** 217 * Pop the last fragment transition from the manager's fragment 218 * back stack. If there is nothing to pop, false is returned. 219 * This function is asynchronous -- it enqueues the 220 * request to pop, but the action will not be performed until the application 221 * returns to its event loop. 222 * 223 * @param name If non-null, this is the name of a previous back state 224 * to look for; if found, all states up to that state will be popped. The 225 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 226 * the named state itself is popped. If null, only the top state is popped. 227 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 228 */ 229 public abstract void popBackStack(String name, int flags); 230 231 /** 232 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 233 * inside of the call. This is like calling {@link #executePendingTransactions()} 234 * afterwards. 235 * @return Returns true if there was something popped, else false. 236 */ 237 public abstract boolean popBackStackImmediate(String name, int flags); 238 239 /** 240 * Pop all back stack states up to the one with the given identifier. 241 * This function is asynchronous -- it enqueues the 242 * request to pop, but the action will not be performed until the application 243 * returns to its event loop. 244 * 245 * @param id Identifier of the stated to be popped. If no identifier exists, 246 * false is returned. 247 * The identifier is the number returned by 248 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 249 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 250 * the named state itself is popped. 251 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 252 */ 253 public abstract void popBackStack(int id, int flags); 254 255 /** 256 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 257 * inside of the call. This is like calling {@link #executePendingTransactions()} 258 * afterwards. 259 * @return Returns true if there was something popped, else false. 260 */ 261 public abstract boolean popBackStackImmediate(int id, int flags); 262 263 /** 264 * Return the number of entries currently in the back stack. 265 */ 266 public abstract int getBackStackEntryCount(); 267 268 /** 269 * Return the BackStackEntry at index <var>index</var> in the back stack; 270 * entries start index 0 being the bottom of the stack. 271 */ 272 public abstract BackStackEntry getBackStackEntryAt(int index); 273 274 /** 275 * Add a new listener for changes to the fragment back stack. 276 */ 277 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 278 279 /** 280 * Remove a listener that was previously added with 281 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 282 */ 283 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 284 285 /** 286 * Put a reference to a fragment in a Bundle. This Bundle can be 287 * persisted as saved state, and when later restoring 288 * {@link #getFragment(Bundle, String)} will return the current 289 * instance of the same fragment. 290 * 291 * @param bundle The bundle in which to put the fragment reference. 292 * @param key The name of the entry in the bundle. 293 * @param fragment The Fragment whose reference is to be stored. 294 */ 295 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 296 297 /** 298 * Retrieve the current Fragment instance for a reference previously 299 * placed with {@link #putFragment(Bundle, String, Fragment)}. 300 * 301 * @param bundle The bundle from which to retrieve the fragment reference. 302 * @param key The name of the entry in the bundle. 303 * @return Returns the current Fragment instance that is associated with 304 * the given reference. 305 */ 306 public abstract Fragment getFragment(Bundle bundle, String key); 307 308 /** 309 * Get a list of all fragments that have been added to the fragment manager. 310 * 311 * @return The list of all fragments or null if none. 312 * @hide 313 */ 314 public abstract List<Fragment> getFragments(); 315 316 /** 317 * Save the current instance state of the given Fragment. This can be 318 * used later when creating a new instance of the Fragment and adding 319 * it to the fragment manager, to have it create itself to match the 320 * current state returned here. Note that there are limits on how 321 * this can be used: 322 * 323 * <ul> 324 * <li>The Fragment must currently be attached to the FragmentManager. 325 * <li>A new Fragment created using this saved state must be the same class 326 * type as the Fragment it was created from. 327 * <li>The saved state can not contain dependencies on other fragments -- 328 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 329 * store a fragment reference because that reference may not be valid when 330 * this saved state is later used. Likewise the Fragment's target and 331 * result code are not included in this state. 332 * </ul> 333 * 334 * @param f The Fragment whose state is to be saved. 335 * @return The generated state. This will be null if there was no 336 * interesting state created by the fragment. 337 */ 338 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 339 340 /** 341 * Returns true if the final {@link android.app.Activity#onDestroy() Activity.onDestroy()} 342 * call has been made on the FragmentManager's Activity, so this instance is now dead. 343 */ 344 public abstract boolean isDestroyed(); 345 346 /** 347 * Print the FragmentManager's state into the given stream. 348 * 349 * @param prefix Text to print at the front of each line. 350 * @param fd The raw file descriptor that the dump is being sent to. 351 * @param writer A PrintWriter to which the dump is to be set. 352 * @param args Additional arguments to the dump request. 353 */ 354 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 355 356 /** 357 * Control whether the framework's internal fragment manager debugging 358 * logs are turned on. If enabled, you will see output in logcat as 359 * the framework performs fragment operations. 360 */ 361 public static void enableDebugLogging(boolean enabled) { 362 FragmentManagerImpl.DEBUG = enabled; 363 } 364} 365 366final class FragmentManagerState implements Parcelable { 367 FragmentState[] mActive; 368 int[] mAdded; 369 BackStackState[] mBackStack; 370 371 public FragmentManagerState() { 372 } 373 374 public FragmentManagerState(Parcel in) { 375 mActive = in.createTypedArray(FragmentState.CREATOR); 376 mAdded = in.createIntArray(); 377 mBackStack = in.createTypedArray(BackStackState.CREATOR); 378 } 379 380 public int describeContents() { 381 return 0; 382 } 383 384 public void writeToParcel(Parcel dest, int flags) { 385 dest.writeTypedArray(mActive, flags); 386 dest.writeIntArray(mAdded); 387 dest.writeTypedArray(mBackStack, flags); 388 } 389 390 public static final Parcelable.Creator<FragmentManagerState> CREATOR 391 = new Parcelable.Creator<FragmentManagerState>() { 392 public FragmentManagerState createFromParcel(Parcel in) { 393 return new FragmentManagerState(in); 394 } 395 396 public FragmentManagerState[] newArray(int size) { 397 return new FragmentManagerState[size]; 398 } 399 }; 400} 401 402/** 403 * Container for fragments associated with an activity. 404 */ 405final class FragmentManagerImpl extends FragmentManager implements LayoutInflaterFactory { 406 static boolean DEBUG = false; 407 static final String TAG = "FragmentManager"; 408 409 static final boolean HONEYCOMB = android.os.Build.VERSION.SDK_INT >= 11; 410 411 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 412 static final String TARGET_STATE_TAG = "android:target_state"; 413 static final String VIEW_STATE_TAG = "android:view_state"; 414 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 415 416 417 static class AnimateOnHWLayerIfNeededListener implements AnimationListener { 418 private AnimationListener mOrignalListener = null; 419 private boolean mShouldRunOnHWLayer = false; 420 private View mView = null; 421 public AnimateOnHWLayerIfNeededListener(final View v, Animation anim) { 422 if (v == null || anim == null) { 423 return; 424 } 425 mView = v; 426 } 427 428 public AnimateOnHWLayerIfNeededListener(final View v, Animation anim, 429 AnimationListener listener) { 430 if (v == null || anim == null) { 431 return; 432 } 433 mOrignalListener = listener; 434 mView = v; 435 } 436 437 @Override 438 @CallSuper 439 public void onAnimationStart(Animation animation) { 440 if (mView != null) { 441 mShouldRunOnHWLayer = shouldRunOnHWLayer(mView, animation); 442 if (mShouldRunOnHWLayer) { 443 mView.post(new Runnable() { 444 @Override 445 public void run() { 446 ViewCompat.setLayerType(mView, ViewCompat.LAYER_TYPE_HARDWARE, null); 447 } 448 }); 449 } 450 } 451 if (mOrignalListener != null) { 452 mOrignalListener.onAnimationStart(animation); 453 } 454 } 455 456 @Override 457 @CallSuper 458 public void onAnimationEnd(Animation animation) { 459 if (mView != null && mShouldRunOnHWLayer) { 460 mView.post(new Runnable() { 461 @Override 462 public void run() { 463 ViewCompat.setLayerType(mView, ViewCompat.LAYER_TYPE_NONE, null); 464 } 465 }); 466 } 467 if (mOrignalListener != null) { 468 mOrignalListener.onAnimationEnd(animation); 469 } 470 } 471 472 @Override 473 public void onAnimationRepeat(Animation animation) { 474 if (mOrignalListener != null) { 475 mOrignalListener.onAnimationRepeat(animation); 476 } 477 } 478 } 479 480 ArrayList<Runnable> mPendingActions; 481 Runnable[] mTmpActions; 482 boolean mExecutingActions; 483 484 ArrayList<Fragment> mActive; 485 ArrayList<Fragment> mAdded; 486 ArrayList<Integer> mAvailIndices; 487 ArrayList<BackStackRecord> mBackStack; 488 ArrayList<Fragment> mCreatedMenus; 489 490 // Must be accessed while locked. 491 ArrayList<BackStackRecord> mBackStackIndices; 492 ArrayList<Integer> mAvailBackStackIndices; 493 494 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 495 496 int mCurState = Fragment.INITIALIZING; 497 FragmentHostCallback mHost; 498 FragmentController mController; 499 FragmentContainer mContainer; 500 Fragment mParent; 501 502 static Field sAnimationListenerField = null; 503 504 boolean mNeedMenuInvalidate; 505 boolean mStateSaved; 506 boolean mDestroyed; 507 String mNoTransactionsBecause; 508 boolean mHavePendingDeferredStart; 509 510 // Temporary vars for state save and restore. 511 Bundle mStateBundle = null; 512 SparseArray<Parcelable> mStateArray = null; 513 514 Runnable mExecCommit = new Runnable() { 515 @Override 516 public void run() { 517 execPendingActions(); 518 } 519 }; 520 521 static boolean modifiesAlpha(Animation anim) { 522 if (anim instanceof AlphaAnimation) { 523 return true; 524 } else if (anim instanceof AnimationSet) { 525 List<Animation> anims = ((AnimationSet) anim).getAnimations(); 526 for (int i = 0; i < anims.size(); i++) { 527 if (anims.get(i) instanceof AlphaAnimation) { 528 return true; 529 } 530 } 531 } 532 return false; 533 } 534 535 static boolean shouldRunOnHWLayer(View v, Animation anim) { 536 return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT 537 && ViewCompat.getLayerType(v) == ViewCompat.LAYER_TYPE_NONE 538 && ViewCompat.hasOverlappingRendering(v) 539 && modifiesAlpha(anim); 540 } 541 542 private void throwException(RuntimeException ex) { 543 Log.e(TAG, ex.getMessage()); 544 Log.e(TAG, "Activity state:"); 545 LogWriter logw = new LogWriter(TAG); 546 PrintWriter pw = new PrintWriter(logw); 547 if (mHost != null) { 548 try { 549 mHost.onDump(" ", null, pw, new String[] { }); 550 } catch (Exception e) { 551 Log.e(TAG, "Failed dumping state", e); 552 } 553 } else { 554 try { 555 dump(" ", null, pw, new String[] { }); 556 } catch (Exception e) { 557 Log.e(TAG, "Failed dumping state", e); 558 } 559 } 560 throw ex; 561 } 562 563 @Override 564 public FragmentTransaction beginTransaction() { 565 return new BackStackRecord(this); 566 } 567 568 @Override 569 public boolean executePendingTransactions() { 570 return execPendingActions(); 571 } 572 573 @Override 574 public void popBackStack() { 575 enqueueAction(new Runnable() { 576 @Override public void run() { 577 popBackStackState(mHost.getHandler(), null, -1, 0); 578 } 579 }, false); 580 } 581 582 @Override 583 public boolean popBackStackImmediate() { 584 checkStateLoss(); 585 executePendingTransactions(); 586 return popBackStackState(mHost.getHandler(), null, -1, 0); 587 } 588 589 @Override 590 public void popBackStack(final String name, final int flags) { 591 enqueueAction(new Runnable() { 592 @Override public void run() { 593 popBackStackState(mHost.getHandler(), name, -1, flags); 594 } 595 }, false); 596 } 597 598 @Override 599 public boolean popBackStackImmediate(String name, int flags) { 600 checkStateLoss(); 601 executePendingTransactions(); 602 return popBackStackState(mHost.getHandler(), name, -1, flags); 603 } 604 605 @Override 606 public void popBackStack(final int id, final int flags) { 607 if (id < 0) { 608 throw new IllegalArgumentException("Bad id: " + id); 609 } 610 enqueueAction(new Runnable() { 611 @Override public void run() { 612 popBackStackState(mHost.getHandler(), null, id, flags); 613 } 614 }, false); 615 } 616 617 @Override 618 public boolean popBackStackImmediate(int id, int flags) { 619 checkStateLoss(); 620 executePendingTransactions(); 621 if (id < 0) { 622 throw new IllegalArgumentException("Bad id: " + id); 623 } 624 return popBackStackState(mHost.getHandler(), null, id, flags); 625 } 626 627 @Override 628 public int getBackStackEntryCount() { 629 return mBackStack != null ? mBackStack.size() : 0; 630 } 631 632 @Override 633 public BackStackEntry getBackStackEntryAt(int index) { 634 return mBackStack.get(index); 635 } 636 637 @Override 638 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 639 if (mBackStackChangeListeners == null) { 640 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 641 } 642 mBackStackChangeListeners.add(listener); 643 } 644 645 @Override 646 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 647 if (mBackStackChangeListeners != null) { 648 mBackStackChangeListeners.remove(listener); 649 } 650 } 651 652 @Override 653 public void putFragment(Bundle bundle, String key, Fragment fragment) { 654 if (fragment.mIndex < 0) { 655 throwException(new IllegalStateException("Fragment " + fragment 656 + " is not currently in the FragmentManager")); 657 } 658 bundle.putInt(key, fragment.mIndex); 659 } 660 661 @Override 662 public Fragment getFragment(Bundle bundle, String key) { 663 int index = bundle.getInt(key, -1); 664 if (index == -1) { 665 return null; 666 } 667 if (index >= mActive.size()) { 668 throwException(new IllegalStateException("Fragment no longer exists for key " 669 + key + ": index " + index)); 670 } 671 Fragment f = mActive.get(index); 672 if (f == null) { 673 throwException(new IllegalStateException("Fragment no longer exists for key " 674 + key + ": index " + index)); 675 } 676 return f; 677 } 678 679 @Override 680 public List<Fragment> getFragments() { 681 return mActive; 682 } 683 684 @Override 685 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 686 if (fragment.mIndex < 0) { 687 throwException( new IllegalStateException("Fragment " + fragment 688 + " is not currently in the FragmentManager")); 689 } 690 if (fragment.mState > Fragment.INITIALIZING) { 691 Bundle result = saveFragmentBasicState(fragment); 692 return result != null ? new Fragment.SavedState(result) : null; 693 } 694 return null; 695 } 696 697 @Override 698 public boolean isDestroyed() { 699 return mDestroyed; 700 } 701 702 @Override 703 public String toString() { 704 StringBuilder sb = new StringBuilder(128); 705 sb.append("FragmentManager{"); 706 sb.append(Integer.toHexString(System.identityHashCode(this))); 707 sb.append(" in "); 708 if (mParent != null) { 709 DebugUtils.buildShortClassTag(mParent, sb); 710 } else { 711 DebugUtils.buildShortClassTag(mHost, sb); 712 } 713 sb.append("}}"); 714 return sb.toString(); 715 } 716 717 @Override 718 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 719 String innerPrefix = prefix + " "; 720 721 int N; 722 if (mActive != null) { 723 N = mActive.size(); 724 if (N > 0) { 725 writer.print(prefix); writer.print("Active Fragments in "); 726 writer.print(Integer.toHexString(System.identityHashCode(this))); 727 writer.println(":"); 728 for (int i=0; i<N; i++) { 729 Fragment f = mActive.get(i); 730 writer.print(prefix); writer.print(" #"); writer.print(i); 731 writer.print(": "); writer.println(f); 732 if (f != null) { 733 f.dump(innerPrefix, fd, writer, args); 734 } 735 } 736 } 737 } 738 739 if (mAdded != null) { 740 N = mAdded.size(); 741 if (N > 0) { 742 writer.print(prefix); writer.println("Added Fragments:"); 743 for (int i=0; i<N; i++) { 744 Fragment f = mAdded.get(i); 745 writer.print(prefix); writer.print(" #"); writer.print(i); 746 writer.print(": "); writer.println(f.toString()); 747 } 748 } 749 } 750 751 if (mCreatedMenus != null) { 752 N = mCreatedMenus.size(); 753 if (N > 0) { 754 writer.print(prefix); writer.println("Fragments Created Menus:"); 755 for (int i=0; i<N; i++) { 756 Fragment f = mCreatedMenus.get(i); 757 writer.print(prefix); writer.print(" #"); writer.print(i); 758 writer.print(": "); writer.println(f.toString()); 759 } 760 } 761 } 762 763 if (mBackStack != null) { 764 N = mBackStack.size(); 765 if (N > 0) { 766 writer.print(prefix); writer.println("Back Stack:"); 767 for (int i=0; i<N; i++) { 768 BackStackRecord bs = mBackStack.get(i); 769 writer.print(prefix); writer.print(" #"); writer.print(i); 770 writer.print(": "); writer.println(bs.toString()); 771 bs.dump(innerPrefix, fd, writer, args); 772 } 773 } 774 } 775 776 synchronized (this) { 777 if (mBackStackIndices != null) { 778 N = mBackStackIndices.size(); 779 if (N > 0) { 780 writer.print(prefix); writer.println("Back Stack Indices:"); 781 for (int i=0; i<N; i++) { 782 BackStackRecord bs = mBackStackIndices.get(i); 783 writer.print(prefix); writer.print(" #"); writer.print(i); 784 writer.print(": "); writer.println(bs); 785 } 786 } 787 } 788 789 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 790 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 791 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 792 } 793 } 794 795 if (mPendingActions != null) { 796 N = mPendingActions.size(); 797 if (N > 0) { 798 writer.print(prefix); writer.println("Pending Actions:"); 799 for (int i=0; i<N; i++) { 800 Runnable r = mPendingActions.get(i); 801 writer.print(prefix); writer.print(" #"); writer.print(i); 802 writer.print(": "); writer.println(r); 803 } 804 } 805 } 806 807 writer.print(prefix); writer.println("FragmentManager misc state:"); 808 writer.print(prefix); writer.print(" mHost="); writer.println(mHost); 809 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 810 if (mParent != null) { 811 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 812 } 813 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 814 writer.print(" mStateSaved="); writer.print(mStateSaved); 815 writer.print(" mDestroyed="); writer.println(mDestroyed); 816 if (mNeedMenuInvalidate) { 817 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 818 writer.println(mNeedMenuInvalidate); 819 } 820 if (mNoTransactionsBecause != null) { 821 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 822 writer.println(mNoTransactionsBecause); 823 } 824 if (mAvailIndices != null && mAvailIndices.size() > 0) { 825 writer.print(prefix); writer.print(" mAvailIndices: "); 826 writer.println(Arrays.toString(mAvailIndices.toArray())); 827 } 828 } 829 830 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 831 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 832 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 833 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 834 835 static final int ANIM_DUR = 220; 836 837 static Animation makeOpenCloseAnimation(Context context, float startScale, 838 float endScale, float startAlpha, float endAlpha) { 839 AnimationSet set = new AnimationSet(false); 840 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 841 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 842 scale.setInterpolator(DECELERATE_QUINT); 843 scale.setDuration(ANIM_DUR); 844 set.addAnimation(scale); 845 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 846 alpha.setInterpolator(DECELERATE_CUBIC); 847 alpha.setDuration(ANIM_DUR); 848 set.addAnimation(alpha); 849 return set; 850 } 851 852 static Animation makeFadeAnimation(Context context, float start, float end) { 853 AlphaAnimation anim = new AlphaAnimation(start, end); 854 anim.setInterpolator(DECELERATE_CUBIC); 855 anim.setDuration(ANIM_DUR); 856 return anim; 857 } 858 859 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 860 int transitionStyle) { 861 Animation animObj = fragment.onCreateAnimation(transit, enter, 862 fragment.mNextAnim); 863 if (animObj != null) { 864 return animObj; 865 } 866 867 if (fragment.mNextAnim != 0) { 868 Animation anim = AnimationUtils.loadAnimation(mHost.getContext(), fragment.mNextAnim); 869 if (anim != null) { 870 return anim; 871 } 872 } 873 874 if (transit == 0) { 875 return null; 876 } 877 878 int styleIndex = transitToStyleIndex(transit, enter); 879 if (styleIndex < 0) { 880 return null; 881 } 882 883 switch (styleIndex) { 884 case ANIM_STYLE_OPEN_ENTER: 885 return makeOpenCloseAnimation(mHost.getContext(), 1.125f, 1.0f, 0, 1); 886 case ANIM_STYLE_OPEN_EXIT: 887 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, .975f, 1, 0); 888 case ANIM_STYLE_CLOSE_ENTER: 889 return makeOpenCloseAnimation(mHost.getContext(), .975f, 1.0f, 0, 1); 890 case ANIM_STYLE_CLOSE_EXIT: 891 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, 1.075f, 1, 0); 892 case ANIM_STYLE_FADE_ENTER: 893 return makeFadeAnimation(mHost.getContext(), 0, 1); 894 case ANIM_STYLE_FADE_EXIT: 895 return makeFadeAnimation(mHost.getContext(), 1, 0); 896 } 897 898 if (transitionStyle == 0 && mHost.onHasWindowAnimations()) { 899 transitionStyle = mHost.onGetWindowAnimations(); 900 } 901 if (transitionStyle == 0) { 902 return null; 903 } 904 905 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 906 // com.android.internal.R.styleable.FragmentAnimation); 907 //int anim = attrs.getResourceId(styleIndex, 0); 908 //attrs.recycle(); 909 910 //if (anim == 0) { 911 // return null; 912 //} 913 914 //return AnimatorInflater.loadAnimator(mActivity, anim); 915 return null; 916 } 917 918 public void performPendingDeferredStart(Fragment f) { 919 if (f.mDeferStart) { 920 if (mExecutingActions) { 921 // Wait until we're done executing our pending transactions 922 mHavePendingDeferredStart = true; 923 return; 924 } 925 f.mDeferStart = false; 926 moveToState(f, mCurState, 0, 0, false); 927 } 928 } 929 930 /** 931 * Sets the to be animated view on hardware layer during the animation. Note 932 * that calling this will replace any existing animation listener on the animation 933 * with a new one, as animations do not support more than one listeners. Therefore, 934 * animations that already have listeners should do the layer change operations 935 * in their existing listeners, rather than calling this function. 936 */ 937 private void setHWLayerAnimListenerIfAlpha(final View v, Animation anim) { 938 if (v == null || anim == null) { 939 return; 940 } 941 if (shouldRunOnHWLayer(v, anim)) { 942 AnimationListener originalListener = null; 943 try { 944 if (sAnimationListenerField == null) { 945 sAnimationListenerField = Animation.class.getDeclaredField("mListener"); 946 sAnimationListenerField.setAccessible(true); 947 } 948 originalListener = (AnimationListener) sAnimationListenerField.get(anim); 949 } catch (NoSuchFieldException e) { 950 Log.e(TAG, "No field with the name mListener is found in Animation class", e); 951 } catch (IllegalAccessException e) { 952 Log.e(TAG, "Cannot access Animation's mListener field", e); 953 } 954 // If there's already a listener set on the animation, we need wrap the new listener 955 // around the existing listener, so that they will both get animation listener 956 // callbacks. 957 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener(v, anim, 958 originalListener)); 959 } 960 } 961 962 void setRetainLoader(boolean retain) { 963 if (mActive != null) { 964 for (int i=0; i<mActive.size(); i++) { 965 Fragment f = mActive.get(i); 966 if (f != null) { 967 f.mRetainLoader = retain; 968 } 969 } 970 } 971 } 972 973 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 974 boolean keepActive) { 975 // Fragments that are not currently added will sit in the onCreate() state. 976 if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) { 977 newState = Fragment.CREATED; 978 } 979 if (f.mRemoving && newState > f.mState) { 980 // While removing a fragment, we can't change it to a higher state. 981 newState = f.mState; 982 } 983 // Defer start if requested; don't allow it to move to STARTED or higher 984 // if it's not already started. 985 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 986 newState = Fragment.STOPPED; 987 } 988 if (f.mState < newState) { 989 // For fragments that are created from a layout, when restoring from 990 // state we don't want to allow them to be created until they are 991 // being reloaded from the layout. 992 if (f.mFromLayout && !f.mInLayout) { 993 return; 994 } 995 if (f.mAnimatingAway != null) { 996 // The fragment is currently being animated... but! Now we 997 // want to move our state back up. Give up on waiting for the 998 // animation, move to whatever the final state should be once 999 // the animation is done, and then we can proceed from there. 1000 f.mAnimatingAway = null; 1001 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 1002 } 1003 switch (f.mState) { 1004 case Fragment.INITIALIZING: 1005 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 1006 if (f.mSavedFragmentState != null) { 1007 f.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 1008 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 1009 FragmentManagerImpl.VIEW_STATE_TAG); 1010 f.mTarget = getFragment(f.mSavedFragmentState, 1011 FragmentManagerImpl.TARGET_STATE_TAG); 1012 if (f.mTarget != null) { 1013 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 1014 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 1015 } 1016 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 1017 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 1018 if (!f.mUserVisibleHint) { 1019 f.mDeferStart = true; 1020 if (newState > Fragment.STOPPED) { 1021 newState = Fragment.STOPPED; 1022 } 1023 } 1024 } 1025 f.mHost = mHost; 1026 f.mParentFragment = mParent; 1027 f.mFragmentManager = mParent != null 1028 ? mParent.mChildFragmentManager : mHost.getFragmentManagerImpl(); 1029 f.mCalled = false; 1030 f.onAttach(mHost.getContext()); 1031 if (!f.mCalled) { 1032 throw new SuperNotCalledException("Fragment " + f 1033 + " did not call through to super.onAttach()"); 1034 } 1035 if (f.mParentFragment == null) { 1036 mHost.onAttachFragment(f); 1037 } 1038 1039 if (!f.mRetaining) { 1040 f.performCreate(f.mSavedFragmentState); 1041 } 1042 f.mRetaining = false; 1043 if (f.mFromLayout) { 1044 // For fragments that are part of the content view 1045 // layout, we need to instantiate the view immediately 1046 // and the inflater will take care of adding it. 1047 f.mView = f.performCreateView(f.getLayoutInflater( 1048 f.mSavedFragmentState), null, f.mSavedFragmentState); 1049 if (f.mView != null) { 1050 f.mInnerView = f.mView; 1051 if (Build.VERSION.SDK_INT >= 11) { 1052 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1053 } else { 1054 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1055 } 1056 if (f.mHidden) f.mView.setVisibility(View.GONE); 1057 f.onViewCreated(f.mView, f.mSavedFragmentState); 1058 } else { 1059 f.mInnerView = null; 1060 } 1061 } 1062 case Fragment.CREATED: 1063 if (newState > Fragment.CREATED) { 1064 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 1065 if (!f.mFromLayout) { 1066 ViewGroup container = null; 1067 if (f.mContainerId != 0) { 1068 container = (ViewGroup)mContainer.onFindViewById(f.mContainerId); 1069 if (container == null && !f.mRestored) { 1070 throwException(new IllegalArgumentException( 1071 "No view found for id 0x" 1072 + Integer.toHexString(f.mContainerId) + " (" 1073 + f.getResources().getResourceName(f.mContainerId) 1074 + ") for fragment " + f)); 1075 } 1076 } 1077 f.mContainer = container; 1078 f.mView = f.performCreateView(f.getLayoutInflater( 1079 f.mSavedFragmentState), container, f.mSavedFragmentState); 1080 if (f.mView != null) { 1081 f.mInnerView = f.mView; 1082 if (Build.VERSION.SDK_INT >= 11) { 1083 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1084 } else { 1085 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1086 } 1087 if (container != null) { 1088 Animation anim = loadAnimation(f, transit, true, 1089 transitionStyle); 1090 if (anim != null) { 1091 setHWLayerAnimListenerIfAlpha(f.mView, anim); 1092 f.mView.startAnimation(anim); 1093 } 1094 container.addView(f.mView); 1095 } 1096 if (f.mHidden) f.mView.setVisibility(View.GONE); 1097 f.onViewCreated(f.mView, f.mSavedFragmentState); 1098 } else { 1099 f.mInnerView = null; 1100 } 1101 } 1102 1103 f.performActivityCreated(f.mSavedFragmentState); 1104 if (f.mView != null) { 1105 f.restoreViewState(f.mSavedFragmentState); 1106 } 1107 f.mSavedFragmentState = null; 1108 } 1109 case Fragment.ACTIVITY_CREATED: 1110 case Fragment.STOPPED: 1111 if (newState > Fragment.STOPPED) { 1112 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 1113 f.performStart(); 1114 } 1115 case Fragment.STARTED: 1116 if (newState > Fragment.STARTED) { 1117 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 1118 f.mResumed = true; 1119 f.performResume(); 1120 f.mSavedFragmentState = null; 1121 f.mSavedViewState = null; 1122 } 1123 } 1124 } else if (f.mState > newState) { 1125 switch (f.mState) { 1126 case Fragment.RESUMED: 1127 if (newState < Fragment.RESUMED) { 1128 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 1129 f.performPause(); 1130 f.mResumed = false; 1131 } 1132 case Fragment.STARTED: 1133 if (newState < Fragment.STARTED) { 1134 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 1135 f.performStop(); 1136 } 1137 case Fragment.STOPPED: 1138 if (newState < Fragment.STOPPED) { 1139 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 1140 f.performReallyStop(); 1141 } 1142 case Fragment.ACTIVITY_CREATED: 1143 if (newState < Fragment.ACTIVITY_CREATED) { 1144 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 1145 if (f.mView != null) { 1146 // Need to save the current view state if not 1147 // done already. 1148 if (mHost.onShouldSaveFragmentState(f) && f.mSavedViewState == null) { 1149 saveFragmentViewState(f); 1150 } 1151 } 1152 f.performDestroyView(); 1153 if (f.mView != null && f.mContainer != null) { 1154 Animation anim = null; 1155 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 1156 anim = loadAnimation(f, transit, false, 1157 transitionStyle); 1158 } 1159 if (anim != null) { 1160 final Fragment fragment = f; 1161 f.mAnimatingAway = f.mView; 1162 f.mStateAfterAnimating = newState; 1163 final View viewToAnimate = f.mView; 1164 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener( 1165 viewToAnimate, anim) { 1166 @Override 1167 public void onAnimationEnd(Animation animation) { 1168 super.onAnimationEnd(animation); 1169 if (fragment.mAnimatingAway != null) { 1170 fragment.mAnimatingAway = null; 1171 moveToState(fragment, fragment.mStateAfterAnimating, 1172 0, 0, false); 1173 } 1174 } 1175 }); 1176 f.mView.startAnimation(anim); 1177 } 1178 f.mContainer.removeView(f.mView); 1179 } 1180 f.mContainer = null; 1181 f.mView = null; 1182 f.mInnerView = null; 1183 } 1184 case Fragment.CREATED: 1185 if (newState < Fragment.CREATED) { 1186 if (mDestroyed) { 1187 if (f.mAnimatingAway != null) { 1188 // The fragment's containing activity is 1189 // being destroyed, but this fragment is 1190 // currently animating away. Stop the 1191 // animation right now -- it is not needed, 1192 // and we can't wait any more on destroying 1193 // the fragment. 1194 View v = f.mAnimatingAway; 1195 f.mAnimatingAway = null; 1196 v.clearAnimation(); 1197 } 1198 } 1199 if (f.mAnimatingAway != null) { 1200 // We are waiting for the fragment's view to finish 1201 // animating away. Just make a note of the state 1202 // the fragment now should move to once the animation 1203 // is done. 1204 f.mStateAfterAnimating = newState; 1205 newState = Fragment.CREATED; 1206 } else { 1207 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1208 if (!f.mRetaining) { 1209 f.performDestroy(); 1210 } 1211 1212 f.mCalled = false; 1213 f.onDetach(); 1214 if (!f.mCalled) { 1215 throw new SuperNotCalledException("Fragment " + f 1216 + " did not call through to super.onDetach()"); 1217 } 1218 if (!keepActive) { 1219 if (!f.mRetaining) { 1220 makeInactive(f); 1221 } else { 1222 f.mHost = null; 1223 f.mParentFragment = null; 1224 f.mFragmentManager = null; 1225 f.mChildFragmentManager = null; 1226 } 1227 } 1228 } 1229 } 1230 } 1231 } 1232 1233 f.mState = newState; 1234 } 1235 1236 void moveToState(Fragment f) { 1237 moveToState(f, mCurState, 0, 0, false); 1238 } 1239 1240 void moveToState(int newState, boolean always) { 1241 moveToState(newState, 0, 0, always); 1242 } 1243 1244 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1245 if (mHost == null && newState != Fragment.INITIALIZING) { 1246 throw new IllegalStateException("No host"); 1247 } 1248 1249 if (!always && mCurState == newState) { 1250 return; 1251 } 1252 1253 mCurState = newState; 1254 if (mActive != null) { 1255 boolean loadersRunning = false; 1256 for (int i=0; i<mActive.size(); i++) { 1257 Fragment f = mActive.get(i); 1258 if (f != null) { 1259 moveToState(f, newState, transit, transitStyle, false); 1260 if (f.mLoaderManager != null) { 1261 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1262 } 1263 } 1264 } 1265 1266 if (!loadersRunning) { 1267 startPendingDeferredFragments(); 1268 } 1269 1270 if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) { 1271 mHost.onSupportInvalidateOptionsMenu(); 1272 mNeedMenuInvalidate = false; 1273 } 1274 } 1275 } 1276 1277 void startPendingDeferredFragments() { 1278 if (mActive == null) return; 1279 1280 for (int i=0; i<mActive.size(); i++) { 1281 Fragment f = mActive.get(i); 1282 if (f != null) { 1283 performPendingDeferredStart(f); 1284 } 1285 } 1286 } 1287 1288 void makeActive(Fragment f) { 1289 if (f.mIndex >= 0) { 1290 return; 1291 } 1292 1293 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1294 if (mActive == null) { 1295 mActive = new ArrayList<Fragment>(); 1296 } 1297 f.setIndex(mActive.size(), mParent); 1298 mActive.add(f); 1299 1300 } else { 1301 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent); 1302 mActive.set(f.mIndex, f); 1303 } 1304 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1305 } 1306 1307 void makeInactive(Fragment f) { 1308 if (f.mIndex < 0) { 1309 return; 1310 } 1311 1312 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1313 mActive.set(f.mIndex, null); 1314 if (mAvailIndices == null) { 1315 mAvailIndices = new ArrayList<Integer>(); 1316 } 1317 mAvailIndices.add(f.mIndex); 1318 mHost.inactivateFragment(f.mWho); 1319 f.initState(); 1320 } 1321 1322 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1323 if (mAdded == null) { 1324 mAdded = new ArrayList<Fragment>(); 1325 } 1326 if (DEBUG) Log.v(TAG, "add: " + fragment); 1327 makeActive(fragment); 1328 if (!fragment.mDetached) { 1329 if (mAdded.contains(fragment)) { 1330 throw new IllegalStateException("Fragment already added: " + fragment); 1331 } 1332 mAdded.add(fragment); 1333 fragment.mAdded = true; 1334 fragment.mRemoving = false; 1335 if (fragment.mHasMenu && fragment.mMenuVisible) { 1336 mNeedMenuInvalidate = true; 1337 } 1338 if (moveToStateNow) { 1339 moveToState(fragment); 1340 } 1341 } 1342 } 1343 1344 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1345 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1346 final boolean inactive = !fragment.isInBackStack(); 1347 if (!fragment.mDetached || inactive) { 1348 if (mAdded != null) { 1349 mAdded.remove(fragment); 1350 } 1351 if (fragment.mHasMenu && fragment.mMenuVisible) { 1352 mNeedMenuInvalidate = true; 1353 } 1354 fragment.mAdded = false; 1355 fragment.mRemoving = true; 1356 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1357 transition, transitionStyle, false); 1358 } 1359 } 1360 1361 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1362 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1363 if (!fragment.mHidden) { 1364 fragment.mHidden = true; 1365 if (fragment.mView != null) { 1366 Animation anim = loadAnimation(fragment, transition, false, 1367 transitionStyle); 1368 if (anim != null) { 1369 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1370 fragment.mView.startAnimation(anim); 1371 } 1372 fragment.mView.setVisibility(View.GONE); 1373 } 1374 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1375 mNeedMenuInvalidate = true; 1376 } 1377 fragment.onHiddenChanged(true); 1378 } 1379 } 1380 1381 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1382 if (DEBUG) Log.v(TAG, "show: " + fragment); 1383 if (fragment.mHidden) { 1384 fragment.mHidden = false; 1385 if (fragment.mView != null) { 1386 Animation anim = loadAnimation(fragment, transition, true, 1387 transitionStyle); 1388 if (anim != null) { 1389 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1390 fragment.mView.startAnimation(anim); 1391 } 1392 fragment.mView.setVisibility(View.VISIBLE); 1393 } 1394 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1395 mNeedMenuInvalidate = true; 1396 } 1397 fragment.onHiddenChanged(false); 1398 } 1399 } 1400 1401 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1402 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1403 if (!fragment.mDetached) { 1404 fragment.mDetached = true; 1405 if (fragment.mAdded) { 1406 // We are not already in back stack, so need to remove the fragment. 1407 if (mAdded != null) { 1408 if (DEBUG) Log.v(TAG, "remove from detach: " + fragment); 1409 mAdded.remove(fragment); 1410 } 1411 if (fragment.mHasMenu && fragment.mMenuVisible) { 1412 mNeedMenuInvalidate = true; 1413 } 1414 fragment.mAdded = false; 1415 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1416 } 1417 } 1418 } 1419 1420 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1421 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1422 if (fragment.mDetached) { 1423 fragment.mDetached = false; 1424 if (!fragment.mAdded) { 1425 if (mAdded == null) { 1426 mAdded = new ArrayList<Fragment>(); 1427 } 1428 if (mAdded.contains(fragment)) { 1429 throw new IllegalStateException("Fragment already added: " + fragment); 1430 } 1431 if (DEBUG) Log.v(TAG, "add from attach: " + fragment); 1432 mAdded.add(fragment); 1433 fragment.mAdded = true; 1434 if (fragment.mHasMenu && fragment.mMenuVisible) { 1435 mNeedMenuInvalidate = true; 1436 } 1437 moveToState(fragment, mCurState, transition, transitionStyle, false); 1438 } 1439 } 1440 } 1441 1442 public Fragment findFragmentById(int id) { 1443 if (mAdded != null) { 1444 // First look through added fragments. 1445 for (int i=mAdded.size()-1; i>=0; i--) { 1446 Fragment f = mAdded.get(i); 1447 if (f != null && f.mFragmentId == id) { 1448 return f; 1449 } 1450 } 1451 } 1452 if (mActive != null) { 1453 // Now for any known fragment. 1454 for (int i=mActive.size()-1; i>=0; i--) { 1455 Fragment f = mActive.get(i); 1456 if (f != null && f.mFragmentId == id) { 1457 return f; 1458 } 1459 } 1460 } 1461 return null; 1462 } 1463 1464 public Fragment findFragmentByTag(String tag) { 1465 if (mAdded != null && tag != null) { 1466 // First look through added fragments. 1467 for (int i=mAdded.size()-1; i>=0; i--) { 1468 Fragment f = mAdded.get(i); 1469 if (f != null && tag.equals(f.mTag)) { 1470 return f; 1471 } 1472 } 1473 } 1474 if (mActive != null && tag != null) { 1475 // Now for any known fragment. 1476 for (int i=mActive.size()-1; i>=0; i--) { 1477 Fragment f = mActive.get(i); 1478 if (f != null && tag.equals(f.mTag)) { 1479 return f; 1480 } 1481 } 1482 } 1483 return null; 1484 } 1485 1486 public Fragment findFragmentByWho(String who) { 1487 if (mActive != null && who != null) { 1488 for (int i=mActive.size()-1; i>=0; i--) { 1489 Fragment f = mActive.get(i); 1490 if (f != null && (f=f.findFragmentByWho(who)) != null) { 1491 return f; 1492 } 1493 } 1494 } 1495 return null; 1496 } 1497 1498 private void checkStateLoss() { 1499 if (mStateSaved) { 1500 throw new IllegalStateException( 1501 "Can not perform this action after onSaveInstanceState"); 1502 } 1503 if (mNoTransactionsBecause != null) { 1504 throw new IllegalStateException( 1505 "Can not perform this action inside of " + mNoTransactionsBecause); 1506 } 1507 } 1508 1509 /** 1510 * Adds an action to the queue of pending actions. 1511 * 1512 * @param action the action to add 1513 * @param allowStateLoss whether to allow loss of state information 1514 * @throws IllegalStateException if the activity has been destroyed 1515 */ 1516 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1517 if (!allowStateLoss) { 1518 checkStateLoss(); 1519 } 1520 synchronized (this) { 1521 if (mDestroyed || mHost == null) { 1522 throw new IllegalStateException("Activity has been destroyed"); 1523 } 1524 if (mPendingActions == null) { 1525 mPendingActions = new ArrayList<Runnable>(); 1526 } 1527 mPendingActions.add(action); 1528 if (mPendingActions.size() == 1) { 1529 mHost.getHandler().removeCallbacks(mExecCommit); 1530 mHost.getHandler().post(mExecCommit); 1531 } 1532 } 1533 } 1534 1535 public int allocBackStackIndex(BackStackRecord bse) { 1536 synchronized (this) { 1537 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1538 if (mBackStackIndices == null) { 1539 mBackStackIndices = new ArrayList<BackStackRecord>(); 1540 } 1541 int index = mBackStackIndices.size(); 1542 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1543 mBackStackIndices.add(bse); 1544 return index; 1545 1546 } else { 1547 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1548 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1549 mBackStackIndices.set(index, bse); 1550 return index; 1551 } 1552 } 1553 } 1554 1555 public void setBackStackIndex(int index, BackStackRecord bse) { 1556 synchronized (this) { 1557 if (mBackStackIndices == null) { 1558 mBackStackIndices = new ArrayList<BackStackRecord>(); 1559 } 1560 int N = mBackStackIndices.size(); 1561 if (index < N) { 1562 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1563 mBackStackIndices.set(index, bse); 1564 } else { 1565 while (N < index) { 1566 mBackStackIndices.add(null); 1567 if (mAvailBackStackIndices == null) { 1568 mAvailBackStackIndices = new ArrayList<Integer>(); 1569 } 1570 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1571 mAvailBackStackIndices.add(N); 1572 N++; 1573 } 1574 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1575 mBackStackIndices.add(bse); 1576 } 1577 } 1578 } 1579 1580 public void freeBackStackIndex(int index) { 1581 synchronized (this) { 1582 mBackStackIndices.set(index, null); 1583 if (mAvailBackStackIndices == null) { 1584 mAvailBackStackIndices = new ArrayList<Integer>(); 1585 } 1586 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1587 mAvailBackStackIndices.add(index); 1588 } 1589 } 1590 1591 /** 1592 * Only call from main thread! 1593 */ 1594 public boolean execPendingActions() { 1595 if (mExecutingActions) { 1596 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1597 } 1598 1599 if (Looper.myLooper() != mHost.getHandler().getLooper()) { 1600 throw new IllegalStateException("Must be called from main thread of process"); 1601 } 1602 1603 boolean didSomething = false; 1604 1605 while (true) { 1606 int numActions; 1607 1608 synchronized (this) { 1609 if (mPendingActions == null || mPendingActions.size() == 0) { 1610 break; 1611 } 1612 1613 numActions = mPendingActions.size(); 1614 if (mTmpActions == null || mTmpActions.length < numActions) { 1615 mTmpActions = new Runnable[numActions]; 1616 } 1617 mPendingActions.toArray(mTmpActions); 1618 mPendingActions.clear(); 1619 mHost.getHandler().removeCallbacks(mExecCommit); 1620 } 1621 1622 mExecutingActions = true; 1623 for (int i=0; i<numActions; i++) { 1624 mTmpActions[i].run(); 1625 mTmpActions[i] = null; 1626 } 1627 mExecutingActions = false; 1628 didSomething = true; 1629 } 1630 1631 if (mHavePendingDeferredStart) { 1632 boolean loadersRunning = false; 1633 for (int i=0; i<mActive.size(); i++) { 1634 Fragment f = mActive.get(i); 1635 if (f != null && f.mLoaderManager != null) { 1636 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1637 } 1638 } 1639 if (!loadersRunning) { 1640 mHavePendingDeferredStart = false; 1641 startPendingDeferredFragments(); 1642 } 1643 } 1644 return didSomething; 1645 } 1646 1647 void reportBackStackChanged() { 1648 if (mBackStackChangeListeners != null) { 1649 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1650 mBackStackChangeListeners.get(i).onBackStackChanged(); 1651 } 1652 } 1653 } 1654 1655 void addBackStackState(BackStackRecord state) { 1656 if (mBackStack == null) { 1657 mBackStack = new ArrayList<BackStackRecord>(); 1658 } 1659 mBackStack.add(state); 1660 reportBackStackChanged(); 1661 } 1662 1663 @SuppressWarnings("unused") 1664 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1665 if (mBackStack == null) { 1666 return false; 1667 } 1668 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1669 int last = mBackStack.size()-1; 1670 if (last < 0) { 1671 return false; 1672 } 1673 final BackStackRecord bss = mBackStack.remove(last); 1674 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1675 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1676 bss.calculateBackFragments(firstOutFragments, lastInFragments); 1677 bss.popFromBackStack(true, null, firstOutFragments, lastInFragments); 1678 reportBackStackChanged(); 1679 } else { 1680 int index = -1; 1681 if (name != null || id >= 0) { 1682 // If a name or ID is specified, look for that place in 1683 // the stack. 1684 index = mBackStack.size()-1; 1685 while (index >= 0) { 1686 BackStackRecord bss = mBackStack.get(index); 1687 if (name != null && name.equals(bss.getName())) { 1688 break; 1689 } 1690 if (id >= 0 && id == bss.mIndex) { 1691 break; 1692 } 1693 index--; 1694 } 1695 if (index < 0) { 1696 return false; 1697 } 1698 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1699 index--; 1700 // Consume all following entries that match. 1701 while (index >= 0) { 1702 BackStackRecord bss = mBackStack.get(index); 1703 if ((name != null && name.equals(bss.getName())) 1704 || (id >= 0 && id == bss.mIndex)) { 1705 index--; 1706 continue; 1707 } 1708 break; 1709 } 1710 } 1711 } 1712 if (index == mBackStack.size()-1) { 1713 return false; 1714 } 1715 final ArrayList<BackStackRecord> states 1716 = new ArrayList<BackStackRecord>(); 1717 for (int i=mBackStack.size()-1; i>index; i--) { 1718 states.add(mBackStack.remove(i)); 1719 } 1720 final int LAST = states.size()-1; 1721 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1722 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1723 for (int i=0; i<=LAST; i++) { 1724 states.get(i).calculateBackFragments(firstOutFragments, lastInFragments); 1725 } 1726 BackStackRecord.TransitionState state = null; 1727 for (int i=0; i<=LAST; i++) { 1728 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1729 state = states.get(i).popFromBackStack(i == LAST, state, 1730 firstOutFragments, lastInFragments); 1731 } 1732 reportBackStackChanged(); 1733 } 1734 return true; 1735 } 1736 1737 ArrayList<Fragment> retainNonConfig() { 1738 ArrayList<Fragment> fragments = null; 1739 if (mActive != null) { 1740 for (int i=0; i<mActive.size(); i++) { 1741 Fragment f = mActive.get(i); 1742 if (f != null && f.mRetainInstance) { 1743 if (fragments == null) { 1744 fragments = new ArrayList<Fragment>(); 1745 } 1746 fragments.add(f); 1747 f.mRetaining = true; 1748 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1749 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1750 } 1751 } 1752 } 1753 return fragments; 1754 } 1755 1756 void saveFragmentViewState(Fragment f) { 1757 if (f.mInnerView == null) { 1758 return; 1759 } 1760 if (mStateArray == null) { 1761 mStateArray = new SparseArray<Parcelable>(); 1762 } else { 1763 mStateArray.clear(); 1764 } 1765 f.mInnerView.saveHierarchyState(mStateArray); 1766 if (mStateArray.size() > 0) { 1767 f.mSavedViewState = mStateArray; 1768 mStateArray = null; 1769 } 1770 } 1771 1772 Bundle saveFragmentBasicState(Fragment f) { 1773 Bundle result = null; 1774 1775 if (mStateBundle == null) { 1776 mStateBundle = new Bundle(); 1777 } 1778 f.performSaveInstanceState(mStateBundle); 1779 if (!mStateBundle.isEmpty()) { 1780 result = mStateBundle; 1781 mStateBundle = null; 1782 } 1783 1784 if (f.mView != null) { 1785 saveFragmentViewState(f); 1786 } 1787 if (f.mSavedViewState != null) { 1788 if (result == null) { 1789 result = new Bundle(); 1790 } 1791 result.putSparseParcelableArray( 1792 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1793 } 1794 if (!f.mUserVisibleHint) { 1795 if (result == null) { 1796 result = new Bundle(); 1797 } 1798 // Only add this if it's not the default value 1799 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1800 } 1801 1802 return result; 1803 } 1804 1805 Parcelable saveAllState() { 1806 // Make sure all pending operations have now been executed to get 1807 // our state update-to-date. 1808 execPendingActions(); 1809 1810 if (HONEYCOMB) { 1811 // As of Honeycomb, we save state after pausing. Prior to that 1812 // it is before pausing. With fragments this is an issue, since 1813 // there are many things you may do after pausing but before 1814 // stopping that change the fragment state. For those older 1815 // devices, we will not at this point say that we have saved 1816 // the state, so we will allow them to continue doing fragment 1817 // transactions. This retains the same semantics as Honeycomb, 1818 // though you do have the risk of losing the very most recent state 1819 // if the process is killed... we'll live with that. 1820 mStateSaved = true; 1821 } 1822 1823 if (mActive == null || mActive.size() <= 0) { 1824 return null; 1825 } 1826 1827 // First collect all active fragments. 1828 int N = mActive.size(); 1829 FragmentState[] active = new FragmentState[N]; 1830 boolean haveFragments = false; 1831 for (int i=0; i<N; i++) { 1832 Fragment f = mActive.get(i); 1833 if (f != null) { 1834 if (f.mIndex < 0) { 1835 throwException(new IllegalStateException( 1836 "Failure saving state: active " + f 1837 + " has cleared index: " + f.mIndex)); 1838 } 1839 1840 haveFragments = true; 1841 1842 FragmentState fs = new FragmentState(f); 1843 active[i] = fs; 1844 1845 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1846 fs.mSavedFragmentState = saveFragmentBasicState(f); 1847 1848 if (f.mTarget != null) { 1849 if (f.mTarget.mIndex < 0) { 1850 throwException(new IllegalStateException( 1851 "Failure saving state: " + f 1852 + " has target not in fragment manager: " + f.mTarget)); 1853 } 1854 if (fs.mSavedFragmentState == null) { 1855 fs.mSavedFragmentState = new Bundle(); 1856 } 1857 putFragment(fs.mSavedFragmentState, 1858 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1859 if (f.mTargetRequestCode != 0) { 1860 fs.mSavedFragmentState.putInt( 1861 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1862 f.mTargetRequestCode); 1863 } 1864 } 1865 1866 } else { 1867 fs.mSavedFragmentState = f.mSavedFragmentState; 1868 } 1869 1870 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1871 + fs.mSavedFragmentState); 1872 } 1873 } 1874 1875 if (!haveFragments) { 1876 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1877 return null; 1878 } 1879 1880 int[] added = null; 1881 BackStackState[] backStack = null; 1882 1883 // Build list of currently added fragments. 1884 if (mAdded != null) { 1885 N = mAdded.size(); 1886 if (N > 0) { 1887 added = new int[N]; 1888 for (int i=0; i<N; i++) { 1889 added[i] = mAdded.get(i).mIndex; 1890 if (added[i] < 0) { 1891 throwException(new IllegalStateException( 1892 "Failure saving state: active " + mAdded.get(i) 1893 + " has cleared index: " + added[i])); 1894 } 1895 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1896 + ": " + mAdded.get(i)); 1897 } 1898 } 1899 } 1900 1901 // Now save back stack. 1902 if (mBackStack != null) { 1903 N = mBackStack.size(); 1904 if (N > 0) { 1905 backStack = new BackStackState[N]; 1906 for (int i=0; i<N; i++) { 1907 backStack[i] = new BackStackState(mBackStack.get(i)); 1908 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1909 + ": " + mBackStack.get(i)); 1910 } 1911 } 1912 } 1913 1914 FragmentManagerState fms = new FragmentManagerState(); 1915 fms.mActive = active; 1916 fms.mAdded = added; 1917 fms.mBackStack = backStack; 1918 return fms; 1919 } 1920 1921 void restoreAllState(Parcelable state, List<Fragment> nonConfig) { 1922 // If there is no saved state at all, then there can not be 1923 // any nonConfig fragments either, so that is that. 1924 if (state == null) return; 1925 FragmentManagerState fms = (FragmentManagerState)state; 1926 if (fms.mActive == null) return; 1927 1928 // First re-attach any non-config instances we are retaining back 1929 // to their saved state, so we don't try to instantiate them again. 1930 if (nonConfig != null) { 1931 for (int i=0; i<nonConfig.size(); i++) { 1932 Fragment f = nonConfig.get(i); 1933 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1934 FragmentState fs = fms.mActive[f.mIndex]; 1935 fs.mInstance = f; 1936 f.mSavedViewState = null; 1937 f.mBackStackNesting = 0; 1938 f.mInLayout = false; 1939 f.mAdded = false; 1940 f.mTarget = null; 1941 if (fs.mSavedFragmentState != null) { 1942 fs.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 1943 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1944 FragmentManagerImpl.VIEW_STATE_TAG); 1945 f.mSavedFragmentState = fs.mSavedFragmentState; 1946 } 1947 } 1948 } 1949 1950 // Build the full list of active fragments, instantiating them from 1951 // their saved state. 1952 mActive = new ArrayList<Fragment>(fms.mActive.length); 1953 if (mAvailIndices != null) { 1954 mAvailIndices.clear(); 1955 } 1956 for (int i=0; i<fms.mActive.length; i++) { 1957 FragmentState fs = fms.mActive[i]; 1958 if (fs != null) { 1959 Fragment f = fs.instantiate(mHost, mParent); 1960 if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); 1961 mActive.add(f); 1962 // Now that the fragment is instantiated (or came from being 1963 // retained above), clear mInstance in case we end up re-restoring 1964 // from this FragmentState again. 1965 fs.mInstance = null; 1966 } else { 1967 mActive.add(null); 1968 if (mAvailIndices == null) { 1969 mAvailIndices = new ArrayList<Integer>(); 1970 } 1971 if (DEBUG) Log.v(TAG, "restoreAllState: avail #" + i); 1972 mAvailIndices.add(i); 1973 } 1974 } 1975 1976 // Update the target of all retained fragments. 1977 if (nonConfig != null) { 1978 for (int i=0; i<nonConfig.size(); i++) { 1979 Fragment f = nonConfig.get(i); 1980 if (f.mTargetIndex >= 0) { 1981 if (f.mTargetIndex < mActive.size()) { 1982 f.mTarget = mActive.get(f.mTargetIndex); 1983 } else { 1984 Log.w(TAG, "Re-attaching retained fragment " + f 1985 + " target no longer exists: " + f.mTargetIndex); 1986 f.mTarget = null; 1987 } 1988 } 1989 } 1990 } 1991 1992 // Build the list of currently added fragments. 1993 if (fms.mAdded != null) { 1994 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1995 for (int i=0; i<fms.mAdded.length; i++) { 1996 Fragment f = mActive.get(fms.mAdded[i]); 1997 if (f == null) { 1998 throwException(new IllegalStateException( 1999 "No instantiated fragment for index #" + fms.mAdded[i])); 2000 } 2001 f.mAdded = true; 2002 if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); 2003 if (mAdded.contains(f)) { 2004 throw new IllegalStateException("Already added!"); 2005 } 2006 mAdded.add(f); 2007 } 2008 } else { 2009 mAdded = null; 2010 } 2011 2012 // Build the back stack. 2013 if (fms.mBackStack != null) { 2014 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 2015 for (int i=0; i<fms.mBackStack.length; i++) { 2016 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 2017 if (DEBUG) { 2018 Log.v(TAG, "restoreAllState: back stack #" + i 2019 + " (index " + bse.mIndex + "): " + bse); 2020 LogWriter logw = new LogWriter(TAG); 2021 PrintWriter pw = new PrintWriter(logw); 2022 bse.dump(" ", pw, false); 2023 } 2024 mBackStack.add(bse); 2025 if (bse.mIndex >= 0) { 2026 setBackStackIndex(bse.mIndex, bse); 2027 } 2028 } 2029 } else { 2030 mBackStack = null; 2031 } 2032 } 2033 2034 public void attachController(FragmentHostCallback host, 2035 FragmentContainer container, Fragment parent) { 2036 if (mHost != null) throw new IllegalStateException("Already attached"); 2037 mHost = host; 2038 mContainer = container; 2039 mParent = parent; 2040 } 2041 2042 public void noteStateNotSaved() { 2043 mStateSaved = false; 2044 } 2045 2046 public void dispatchCreate() { 2047 mStateSaved = false; 2048 moveToState(Fragment.CREATED, false); 2049 } 2050 2051 public void dispatchActivityCreated() { 2052 mStateSaved = false; 2053 moveToState(Fragment.ACTIVITY_CREATED, false); 2054 } 2055 2056 public void dispatchStart() { 2057 mStateSaved = false; 2058 moveToState(Fragment.STARTED, false); 2059 } 2060 2061 public void dispatchResume() { 2062 mStateSaved = false; 2063 moveToState(Fragment.RESUMED, false); 2064 } 2065 2066 public void dispatchPause() { 2067 moveToState(Fragment.STARTED, false); 2068 } 2069 2070 public void dispatchStop() { 2071 // See saveAllState() for the explanation of this. We do this for 2072 // all platform versions, to keep our behavior more consistent between 2073 // them. 2074 mStateSaved = true; 2075 2076 moveToState(Fragment.STOPPED, false); 2077 } 2078 2079 public void dispatchReallyStop() { 2080 moveToState(Fragment.ACTIVITY_CREATED, false); 2081 } 2082 2083 public void dispatchDestroyView() { 2084 moveToState(Fragment.CREATED, false); 2085 } 2086 2087 public void dispatchDestroy() { 2088 mDestroyed = true; 2089 execPendingActions(); 2090 moveToState(Fragment.INITIALIZING, false); 2091 mHost = null; 2092 mContainer = null; 2093 mParent = null; 2094 } 2095 2096 public void dispatchConfigurationChanged(Configuration newConfig) { 2097 if (mAdded != null) { 2098 for (int i=0; i<mAdded.size(); i++) { 2099 Fragment f = mAdded.get(i); 2100 if (f != null) { 2101 f.performConfigurationChanged(newConfig); 2102 } 2103 } 2104 } 2105 } 2106 2107 public void dispatchLowMemory() { 2108 if (mAdded != null) { 2109 for (int i=0; i<mAdded.size(); i++) { 2110 Fragment f = mAdded.get(i); 2111 if (f != null) { 2112 f.performLowMemory(); 2113 } 2114 } 2115 } 2116 } 2117 2118 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 2119 boolean show = false; 2120 ArrayList<Fragment> newMenus = null; 2121 if (mAdded != null) { 2122 for (int i=0; i<mAdded.size(); i++) { 2123 Fragment f = mAdded.get(i); 2124 if (f != null) { 2125 if (f.performCreateOptionsMenu(menu, inflater)) { 2126 show = true; 2127 if (newMenus == null) { 2128 newMenus = new ArrayList<Fragment>(); 2129 } 2130 newMenus.add(f); 2131 } 2132 } 2133 } 2134 } 2135 2136 if (mCreatedMenus != null) { 2137 for (int i=0; i<mCreatedMenus.size(); i++) { 2138 Fragment f = mCreatedMenus.get(i); 2139 if (newMenus == null || !newMenus.contains(f)) { 2140 f.onDestroyOptionsMenu(); 2141 } 2142 } 2143 } 2144 2145 mCreatedMenus = newMenus; 2146 2147 return show; 2148 } 2149 2150 public boolean dispatchPrepareOptionsMenu(Menu menu) { 2151 boolean show = false; 2152 if (mAdded != null) { 2153 for (int i=0; i<mAdded.size(); i++) { 2154 Fragment f = mAdded.get(i); 2155 if (f != null) { 2156 if (f.performPrepareOptionsMenu(menu)) { 2157 show = true; 2158 } 2159 } 2160 } 2161 } 2162 return show; 2163 } 2164 2165 public boolean dispatchOptionsItemSelected(MenuItem item) { 2166 if (mAdded != null) { 2167 for (int i=0; i<mAdded.size(); i++) { 2168 Fragment f = mAdded.get(i); 2169 if (f != null) { 2170 if (f.performOptionsItemSelected(item)) { 2171 return true; 2172 } 2173 } 2174 } 2175 } 2176 return false; 2177 } 2178 2179 public boolean dispatchContextItemSelected(MenuItem item) { 2180 if (mAdded != null) { 2181 for (int i=0; i<mAdded.size(); i++) { 2182 Fragment f = mAdded.get(i); 2183 if (f != null) { 2184 if (f.performContextItemSelected(item)) { 2185 return true; 2186 } 2187 } 2188 } 2189 } 2190 return false; 2191 } 2192 2193 public void dispatchOptionsMenuClosed(Menu menu) { 2194 if (mAdded != null) { 2195 for (int i=0; i<mAdded.size(); i++) { 2196 Fragment f = mAdded.get(i); 2197 if (f != null) { 2198 f.performOptionsMenuClosed(menu); 2199 } 2200 } 2201 } 2202 } 2203 2204 public static int reverseTransit(int transit) { 2205 int rev = 0; 2206 switch (transit) { 2207 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2208 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 2209 break; 2210 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2211 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 2212 break; 2213 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2214 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 2215 break; 2216 } 2217 return rev; 2218 2219 } 2220 2221 public static final int ANIM_STYLE_OPEN_ENTER = 1; 2222 public static final int ANIM_STYLE_OPEN_EXIT = 2; 2223 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 2224 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 2225 public static final int ANIM_STYLE_FADE_ENTER = 5; 2226 public static final int ANIM_STYLE_FADE_EXIT = 6; 2227 2228 public static int transitToStyleIndex(int transit, boolean enter) { 2229 int animAttr = -1; 2230 switch (transit) { 2231 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2232 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 2233 break; 2234 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2235 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 2236 break; 2237 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2238 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 2239 break; 2240 } 2241 return animAttr; 2242 } 2243 2244 @Override 2245 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 2246 if (!"fragment".equals(name)) { 2247 return null; 2248 } 2249 2250 String fname = attrs.getAttributeValue(null, "class"); 2251 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 2252 if (fname == null) { 2253 fname = a.getString(FragmentTag.Fragment_name); 2254 } 2255 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 2256 String tag = a.getString(FragmentTag.Fragment_tag); 2257 a.recycle(); 2258 2259 if (!Fragment.isSupportFragmentClass(mHost.getContext(), fname)) { 2260 // Invalid support lib fragment; let the device's framework handle it. 2261 // This will allow android.app.Fragments to do the right thing. 2262 return null; 2263 } 2264 2265 int containerId = parent != null ? parent.getId() : 0; 2266 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 2267 throw new IllegalArgumentException(attrs.getPositionDescription() 2268 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 2269 } 2270 2271 // If we restored from a previous state, we may already have 2272 // instantiated this fragment from the state and should use 2273 // that instance instead of making a new one. 2274 Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null; 2275 if (fragment == null && tag != null) { 2276 fragment = findFragmentByTag(tag); 2277 } 2278 if (fragment == null && containerId != View.NO_ID) { 2279 fragment = findFragmentById(containerId); 2280 } 2281 2282 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 2283 + Integer.toHexString(id) + " fname=" + fname 2284 + " existing=" + fragment); 2285 if (fragment == null) { 2286 fragment = Fragment.instantiate(context, fname); 2287 fragment.mFromLayout = true; 2288 fragment.mFragmentId = id != 0 ? id : containerId; 2289 fragment.mContainerId = containerId; 2290 fragment.mTag = tag; 2291 fragment.mInLayout = true; 2292 fragment.mFragmentManager = this; 2293 fragment.mHost = mHost; 2294 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2295 addFragment(fragment, true); 2296 2297 } else if (fragment.mInLayout) { 2298 // A fragment already exists and it is not one we restored from 2299 // previous state. 2300 throw new IllegalArgumentException(attrs.getPositionDescription() 2301 + ": Duplicate id 0x" + Integer.toHexString(id) 2302 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 2303 + " with another fragment for " + fname); 2304 } else { 2305 // This fragment was retained from a previous instance; get it 2306 // going now. 2307 fragment.mInLayout = true; 2308 // If this fragment is newly instantiated (either right now, or 2309 // from last saved state), then give it the attributes to 2310 // initialize itself. 2311 if (!fragment.mRetaining) { 2312 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2313 } 2314 } 2315 2316 // If we haven't finished entering the CREATED state ourselves yet, 2317 // push the inflated child fragment along. 2318 if (mCurState < Fragment.CREATED && fragment.mFromLayout) { 2319 moveToState(fragment, Fragment.CREATED, 0, 0, false); 2320 } else { 2321 moveToState(fragment); 2322 } 2323 2324 if (fragment.mView == null) { 2325 throw new IllegalStateException("Fragment " + fname 2326 + " did not create a view."); 2327 } 2328 if (id != 0) { 2329 fragment.mView.setId(id); 2330 } 2331 if (fragment.mView.getTag() == null) { 2332 fragment.mView.setTag(tag); 2333 } 2334 return fragment.mView; 2335 } 2336 2337 LayoutInflaterFactory getLayoutInflaterFactory() { 2338 return this; 2339 } 2340 2341 static class FragmentTag { 2342 public static final int[] Fragment = { 2343 0x01010003, 0x010100d0, 0x010100d1 2344 }; 2345 public static final int Fragment_id = 1; 2346 public static final int Fragment_name = 0; 2347 public static final int Fragment_tag = 2; 2348 } 2349} 2350