FragmentManager.java revision 7e6e889eb9fdad71b015455ec9353359366f61d3
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 ViewCompat.getLayerType(v) == ViewCompat.LAYER_TYPE_NONE 537 && ViewCompat.hasOverlappingRendering(v) 538 && modifiesAlpha(anim); 539 } 540 541 private void throwException(RuntimeException ex) { 542 Log.e(TAG, ex.getMessage()); 543 Log.e(TAG, "Activity state:"); 544 LogWriter logw = new LogWriter(TAG); 545 PrintWriter pw = new PrintWriter(logw); 546 if (mHost != null) { 547 try { 548 mHost.onDump(" ", null, pw, new String[] { }); 549 } catch (Exception e) { 550 Log.e(TAG, "Failed dumping state", e); 551 } 552 } else { 553 try { 554 dump(" ", null, pw, new String[] { }); 555 } catch (Exception e) { 556 Log.e(TAG, "Failed dumping state", e); 557 } 558 } 559 throw ex; 560 } 561 562 @Override 563 public FragmentTransaction beginTransaction() { 564 return new BackStackRecord(this); 565 } 566 567 @Override 568 public boolean executePendingTransactions() { 569 return execPendingActions(); 570 } 571 572 @Override 573 public void popBackStack() { 574 enqueueAction(new Runnable() { 575 @Override public void run() { 576 popBackStackState(mHost.getHandler(), null, -1, 0); 577 } 578 }, false); 579 } 580 581 @Override 582 public boolean popBackStackImmediate() { 583 checkStateLoss(); 584 executePendingTransactions(); 585 return popBackStackState(mHost.getHandler(), null, -1, 0); 586 } 587 588 @Override 589 public void popBackStack(final String name, final int flags) { 590 enqueueAction(new Runnable() { 591 @Override public void run() { 592 popBackStackState(mHost.getHandler(), name, -1, flags); 593 } 594 }, false); 595 } 596 597 @Override 598 public boolean popBackStackImmediate(String name, int flags) { 599 checkStateLoss(); 600 executePendingTransactions(); 601 return popBackStackState(mHost.getHandler(), name, -1, flags); 602 } 603 604 @Override 605 public void popBackStack(final int id, final int flags) { 606 if (id < 0) { 607 throw new IllegalArgumentException("Bad id: " + id); 608 } 609 enqueueAction(new Runnable() { 610 @Override public void run() { 611 popBackStackState(mHost.getHandler(), null, id, flags); 612 } 613 }, false); 614 } 615 616 @Override 617 public boolean popBackStackImmediate(int id, int flags) { 618 checkStateLoss(); 619 executePendingTransactions(); 620 if (id < 0) { 621 throw new IllegalArgumentException("Bad id: " + id); 622 } 623 return popBackStackState(mHost.getHandler(), null, id, flags); 624 } 625 626 @Override 627 public int getBackStackEntryCount() { 628 return mBackStack != null ? mBackStack.size() : 0; 629 } 630 631 @Override 632 public BackStackEntry getBackStackEntryAt(int index) { 633 return mBackStack.get(index); 634 } 635 636 @Override 637 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 638 if (mBackStackChangeListeners == null) { 639 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 640 } 641 mBackStackChangeListeners.add(listener); 642 } 643 644 @Override 645 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 646 if (mBackStackChangeListeners != null) { 647 mBackStackChangeListeners.remove(listener); 648 } 649 } 650 651 @Override 652 public void putFragment(Bundle bundle, String key, Fragment fragment) { 653 if (fragment.mIndex < 0) { 654 throwException(new IllegalStateException("Fragment " + fragment 655 + " is not currently in the FragmentManager")); 656 } 657 bundle.putInt(key, fragment.mIndex); 658 } 659 660 @Override 661 public Fragment getFragment(Bundle bundle, String key) { 662 int index = bundle.getInt(key, -1); 663 if (index == -1) { 664 return null; 665 } 666 if (index >= mActive.size()) { 667 throwException(new IllegalStateException("Fragment no longer exists for key " 668 + key + ": index " + index)); 669 } 670 Fragment f = mActive.get(index); 671 if (f == null) { 672 throwException(new IllegalStateException("Fragment no longer exists for key " 673 + key + ": index " + index)); 674 } 675 return f; 676 } 677 678 @Override 679 public List<Fragment> getFragments() { 680 return mActive; 681 } 682 683 @Override 684 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 685 if (fragment.mIndex < 0) { 686 throwException( new IllegalStateException("Fragment " + fragment 687 + " is not currently in the FragmentManager")); 688 } 689 if (fragment.mState > Fragment.INITIALIZING) { 690 Bundle result = saveFragmentBasicState(fragment); 691 return result != null ? new Fragment.SavedState(result) : null; 692 } 693 return null; 694 } 695 696 @Override 697 public boolean isDestroyed() { 698 return mDestroyed; 699 } 700 701 @Override 702 public String toString() { 703 StringBuilder sb = new StringBuilder(128); 704 sb.append("FragmentManager{"); 705 sb.append(Integer.toHexString(System.identityHashCode(this))); 706 sb.append(" in "); 707 if (mParent != null) { 708 DebugUtils.buildShortClassTag(mParent, sb); 709 } else { 710 DebugUtils.buildShortClassTag(mHost, sb); 711 } 712 sb.append("}}"); 713 return sb.toString(); 714 } 715 716 @Override 717 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 718 String innerPrefix = prefix + " "; 719 720 int N; 721 if (mActive != null) { 722 N = mActive.size(); 723 if (N > 0) { 724 writer.print(prefix); writer.print("Active Fragments in "); 725 writer.print(Integer.toHexString(System.identityHashCode(this))); 726 writer.println(":"); 727 for (int i=0; i<N; i++) { 728 Fragment f = mActive.get(i); 729 writer.print(prefix); writer.print(" #"); writer.print(i); 730 writer.print(": "); writer.println(f); 731 if (f != null) { 732 f.dump(innerPrefix, fd, writer, args); 733 } 734 } 735 } 736 } 737 738 if (mAdded != null) { 739 N = mAdded.size(); 740 if (N > 0) { 741 writer.print(prefix); writer.println("Added Fragments:"); 742 for (int i=0; i<N; i++) { 743 Fragment f = mAdded.get(i); 744 writer.print(prefix); writer.print(" #"); writer.print(i); 745 writer.print(": "); writer.println(f.toString()); 746 } 747 } 748 } 749 750 if (mCreatedMenus != null) { 751 N = mCreatedMenus.size(); 752 if (N > 0) { 753 writer.print(prefix); writer.println("Fragments Created Menus:"); 754 for (int i=0; i<N; i++) { 755 Fragment f = mCreatedMenus.get(i); 756 writer.print(prefix); writer.print(" #"); writer.print(i); 757 writer.print(": "); writer.println(f.toString()); 758 } 759 } 760 } 761 762 if (mBackStack != null) { 763 N = mBackStack.size(); 764 if (N > 0) { 765 writer.print(prefix); writer.println("Back Stack:"); 766 for (int i=0; i<N; i++) { 767 BackStackRecord bs = mBackStack.get(i); 768 writer.print(prefix); writer.print(" #"); writer.print(i); 769 writer.print(": "); writer.println(bs.toString()); 770 bs.dump(innerPrefix, fd, writer, args); 771 } 772 } 773 } 774 775 synchronized (this) { 776 if (mBackStackIndices != null) { 777 N = mBackStackIndices.size(); 778 if (N > 0) { 779 writer.print(prefix); writer.println("Back Stack Indices:"); 780 for (int i=0; i<N; i++) { 781 BackStackRecord bs = mBackStackIndices.get(i); 782 writer.print(prefix); writer.print(" #"); writer.print(i); 783 writer.print(": "); writer.println(bs); 784 } 785 } 786 } 787 788 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 789 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 790 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 791 } 792 } 793 794 if (mPendingActions != null) { 795 N = mPendingActions.size(); 796 if (N > 0) { 797 writer.print(prefix); writer.println("Pending Actions:"); 798 for (int i=0; i<N; i++) { 799 Runnable r = mPendingActions.get(i); 800 writer.print(prefix); writer.print(" #"); writer.print(i); 801 writer.print(": "); writer.println(r); 802 } 803 } 804 } 805 806 writer.print(prefix); writer.println("FragmentManager misc state:"); 807 writer.print(prefix); writer.print(" mHost="); writer.println(mHost); 808 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 809 if (mParent != null) { 810 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 811 } 812 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 813 writer.print(" mStateSaved="); writer.print(mStateSaved); 814 writer.print(" mDestroyed="); writer.println(mDestroyed); 815 if (mNeedMenuInvalidate) { 816 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 817 writer.println(mNeedMenuInvalidate); 818 } 819 if (mNoTransactionsBecause != null) { 820 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 821 writer.println(mNoTransactionsBecause); 822 } 823 if (mAvailIndices != null && mAvailIndices.size() > 0) { 824 writer.print(prefix); writer.print(" mAvailIndices: "); 825 writer.println(Arrays.toString(mAvailIndices.toArray())); 826 } 827 } 828 829 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 830 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 831 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 832 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 833 834 static final int ANIM_DUR = 220; 835 836 static Animation makeOpenCloseAnimation(Context context, float startScale, 837 float endScale, float startAlpha, float endAlpha) { 838 AnimationSet set = new AnimationSet(false); 839 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 840 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 841 scale.setInterpolator(DECELERATE_QUINT); 842 scale.setDuration(ANIM_DUR); 843 set.addAnimation(scale); 844 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 845 alpha.setInterpolator(DECELERATE_CUBIC); 846 alpha.setDuration(ANIM_DUR); 847 set.addAnimation(alpha); 848 return set; 849 } 850 851 static Animation makeFadeAnimation(Context context, float start, float end) { 852 AlphaAnimation anim = new AlphaAnimation(start, end); 853 anim.setInterpolator(DECELERATE_CUBIC); 854 anim.setDuration(ANIM_DUR); 855 return anim; 856 } 857 858 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 859 int transitionStyle) { 860 Animation animObj = fragment.onCreateAnimation(transit, enter, 861 fragment.mNextAnim); 862 if (animObj != null) { 863 return animObj; 864 } 865 866 if (fragment.mNextAnim != 0) { 867 Animation anim = AnimationUtils.loadAnimation(mHost.getContext(), fragment.mNextAnim); 868 if (anim != null) { 869 return anim; 870 } 871 } 872 873 if (transit == 0) { 874 return null; 875 } 876 877 int styleIndex = transitToStyleIndex(transit, enter); 878 if (styleIndex < 0) { 879 return null; 880 } 881 882 switch (styleIndex) { 883 case ANIM_STYLE_OPEN_ENTER: 884 return makeOpenCloseAnimation(mHost.getContext(), 1.125f, 1.0f, 0, 1); 885 case ANIM_STYLE_OPEN_EXIT: 886 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, .975f, 1, 0); 887 case ANIM_STYLE_CLOSE_ENTER: 888 return makeOpenCloseAnimation(mHost.getContext(), .975f, 1.0f, 0, 1); 889 case ANIM_STYLE_CLOSE_EXIT: 890 return makeOpenCloseAnimation(mHost.getContext(), 1.0f, 1.075f, 1, 0); 891 case ANIM_STYLE_FADE_ENTER: 892 return makeFadeAnimation(mHost.getContext(), 0, 1); 893 case ANIM_STYLE_FADE_EXIT: 894 return makeFadeAnimation(mHost.getContext(), 1, 0); 895 } 896 897 if (transitionStyle == 0 && mHost.onHasWindowAnimations()) { 898 transitionStyle = mHost.onGetWindowAnimations(); 899 } 900 if (transitionStyle == 0) { 901 return null; 902 } 903 904 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 905 // com.android.internal.R.styleable.FragmentAnimation); 906 //int anim = attrs.getResourceId(styleIndex, 0); 907 //attrs.recycle(); 908 909 //if (anim == 0) { 910 // return null; 911 //} 912 913 //return AnimatorInflater.loadAnimator(mActivity, anim); 914 return null; 915 } 916 917 public void performPendingDeferredStart(Fragment f) { 918 if (f.mDeferStart) { 919 if (mExecutingActions) { 920 // Wait until we're done executing our pending transactions 921 mHavePendingDeferredStart = true; 922 return; 923 } 924 f.mDeferStart = false; 925 moveToState(f, mCurState, 0, 0, false); 926 } 927 } 928 929 /** 930 * Sets the to be animated view on hardware layer during the animation. Note 931 * that calling this will replace any existing animation listener on the animation 932 * with a new one, as animations do not support more than one listeners. Therefore, 933 * animations that already have listeners should do the layer change operations 934 * in their existing listeners, rather than calling this function. 935 */ 936 private void setHWLayerAnimListenerIfAlpha(final View v, Animation anim) { 937 if (v == null || anim == null) { 938 return; 939 } 940 if (shouldRunOnHWLayer(v, anim)) { 941 AnimationListener originalListener = null; 942 try { 943 if (sAnimationListenerField == null) { 944 sAnimationListenerField = Animation.class.getDeclaredField("mListener"); 945 sAnimationListenerField.setAccessible(true); 946 } 947 originalListener = (AnimationListener) sAnimationListenerField.get(anim); 948 } catch (NoSuchFieldException e) { 949 Log.e(TAG, "No field with the name mListener is found in Animation class", e); 950 } catch (IllegalAccessException e) { 951 Log.e(TAG, "Cannot access Animation's mListener field", e); 952 } 953 // If there's already a listener set on the animation, we need wrap the new listener 954 // around the existing listener, so that they will both get animation listener 955 // callbacks. 956 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener(v, anim, 957 originalListener)); 958 } 959 } 960 961 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 962 boolean keepActive) { 963 // Fragments that are not currently added will sit in the onCreate() state. 964 if ((!f.mAdded || f.mDetached) && newState > Fragment.CREATED) { 965 newState = Fragment.CREATED; 966 } 967 if (f.mRemoving && newState > f.mState) { 968 // While removing a fragment, we can't change it to a higher state. 969 newState = f.mState; 970 } 971 // Defer start if requested; don't allow it to move to STARTED or higher 972 // if it's not already started. 973 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 974 newState = Fragment.STOPPED; 975 } 976 if (f.mState < newState) { 977 // For fragments that are created from a layout, when restoring from 978 // state we don't want to allow them to be created until they are 979 // being reloaded from the layout. 980 if (f.mFromLayout && !f.mInLayout) { 981 return; 982 } 983 if (f.mAnimatingAway != null) { 984 // The fragment is currently being animated... but! Now we 985 // want to move our state back up. Give up on waiting for the 986 // animation, move to whatever the final state should be once 987 // the animation is done, and then we can proceed from there. 988 f.mAnimatingAway = null; 989 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 990 } 991 switch (f.mState) { 992 case Fragment.INITIALIZING: 993 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 994 if (f.mSavedFragmentState != null) { 995 f.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 996 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 997 FragmentManagerImpl.VIEW_STATE_TAG); 998 f.mTarget = getFragment(f.mSavedFragmentState, 999 FragmentManagerImpl.TARGET_STATE_TAG); 1000 if (f.mTarget != null) { 1001 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 1002 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 1003 } 1004 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 1005 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 1006 if (!f.mUserVisibleHint) { 1007 f.mDeferStart = true; 1008 if (newState > Fragment.STOPPED) { 1009 newState = Fragment.STOPPED; 1010 } 1011 } 1012 } 1013 f.mHost = mHost; 1014 f.mParentFragment = mParent; 1015 f.mFragmentManager = mParent != null 1016 ? mParent.mChildFragmentManager : mHost.getFragmentManagerImpl(); 1017 f.mCalled = false; 1018 f.onAttach(mHost.getContext()); 1019 if (!f.mCalled) { 1020 throw new SuperNotCalledException("Fragment " + f 1021 + " did not call through to super.onAttach()"); 1022 } 1023 if (f.mParentFragment == null) { 1024 mHost.onAttachFragment(f); 1025 } 1026 1027 if (!f.mRetaining) { 1028 f.performCreate(f.mSavedFragmentState); 1029 } 1030 f.mRetaining = false; 1031 if (f.mFromLayout) { 1032 // For fragments that are part of the content view 1033 // layout, we need to instantiate the view immediately 1034 // and the inflater will take care of adding it. 1035 f.mView = f.performCreateView(f.getLayoutInflater( 1036 f.mSavedFragmentState), null, f.mSavedFragmentState); 1037 if (f.mView != null) { 1038 f.mInnerView = f.mView; 1039 if (Build.VERSION.SDK_INT >= 11) { 1040 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1041 } else { 1042 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1043 } 1044 if (f.mHidden) f.mView.setVisibility(View.GONE); 1045 f.onViewCreated(f.mView, f.mSavedFragmentState); 1046 } else { 1047 f.mInnerView = null; 1048 } 1049 } 1050 case Fragment.CREATED: 1051 if (newState > Fragment.CREATED) { 1052 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 1053 if (!f.mFromLayout) { 1054 ViewGroup container = null; 1055 if (f.mContainerId != 0) { 1056 container = (ViewGroup)mContainer.onFindViewById(f.mContainerId); 1057 if (container == null && !f.mRestored) { 1058 throwException(new IllegalArgumentException( 1059 "No view found for id 0x" 1060 + Integer.toHexString(f.mContainerId) + " (" 1061 + f.getResources().getResourceName(f.mContainerId) 1062 + ") for fragment " + f)); 1063 } 1064 } 1065 f.mContainer = container; 1066 f.mView = f.performCreateView(f.getLayoutInflater( 1067 f.mSavedFragmentState), container, f.mSavedFragmentState); 1068 if (f.mView != null) { 1069 f.mInnerView = f.mView; 1070 if (Build.VERSION.SDK_INT >= 11) { 1071 ViewCompat.setSaveFromParentEnabled(f.mView, false); 1072 } else { 1073 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 1074 } 1075 if (container != null) { 1076 Animation anim = loadAnimation(f, transit, true, 1077 transitionStyle); 1078 if (anim != null) { 1079 setHWLayerAnimListenerIfAlpha(f.mView, anim); 1080 f.mView.startAnimation(anim); 1081 } 1082 container.addView(f.mView); 1083 } 1084 if (f.mHidden) f.mView.setVisibility(View.GONE); 1085 f.onViewCreated(f.mView, f.mSavedFragmentState); 1086 } else { 1087 f.mInnerView = null; 1088 } 1089 } 1090 1091 f.performActivityCreated(f.mSavedFragmentState); 1092 if (f.mView != null) { 1093 f.restoreViewState(f.mSavedFragmentState); 1094 } 1095 f.mSavedFragmentState = null; 1096 } 1097 case Fragment.ACTIVITY_CREATED: 1098 case Fragment.STOPPED: 1099 if (newState > Fragment.STOPPED) { 1100 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 1101 f.performStart(); 1102 } 1103 case Fragment.STARTED: 1104 if (newState > Fragment.STARTED) { 1105 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 1106 f.mResumed = true; 1107 f.performResume(); 1108 f.mSavedFragmentState = null; 1109 f.mSavedViewState = null; 1110 } 1111 } 1112 } else if (f.mState > newState) { 1113 switch (f.mState) { 1114 case Fragment.RESUMED: 1115 if (newState < Fragment.RESUMED) { 1116 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 1117 f.performPause(); 1118 f.mResumed = false; 1119 } 1120 case Fragment.STARTED: 1121 if (newState < Fragment.STARTED) { 1122 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 1123 f.performStop(); 1124 } 1125 case Fragment.STOPPED: 1126 if (newState < Fragment.STOPPED) { 1127 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 1128 f.performReallyStop(); 1129 } 1130 case Fragment.ACTIVITY_CREATED: 1131 if (newState < Fragment.ACTIVITY_CREATED) { 1132 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 1133 if (f.mView != null) { 1134 // Need to save the current view state if not 1135 // done already. 1136 if (mHost.onShouldSaveFragmentState(f) && f.mSavedViewState == null) { 1137 saveFragmentViewState(f); 1138 } 1139 } 1140 f.performDestroyView(); 1141 if (f.mView != null && f.mContainer != null) { 1142 Animation anim = null; 1143 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 1144 anim = loadAnimation(f, transit, false, 1145 transitionStyle); 1146 } 1147 if (anim != null) { 1148 final Fragment fragment = f; 1149 f.mAnimatingAway = f.mView; 1150 f.mStateAfterAnimating = newState; 1151 final View viewToAnimate = f.mView; 1152 anim.setAnimationListener(new AnimateOnHWLayerIfNeededListener( 1153 viewToAnimate, anim) { 1154 @Override 1155 public void onAnimationEnd(Animation animation) { 1156 super.onAnimationEnd(animation); 1157 if (fragment.mAnimatingAway != null) { 1158 fragment.mAnimatingAway = null; 1159 moveToState(fragment, fragment.mStateAfterAnimating, 1160 0, 0, false); 1161 } 1162 } 1163 }); 1164 f.mView.startAnimation(anim); 1165 } 1166 f.mContainer.removeView(f.mView); 1167 } 1168 f.mContainer = null; 1169 f.mView = null; 1170 f.mInnerView = null; 1171 } 1172 case Fragment.CREATED: 1173 if (newState < Fragment.CREATED) { 1174 if (mDestroyed) { 1175 if (f.mAnimatingAway != null) { 1176 // The fragment's containing activity is 1177 // being destroyed, but this fragment is 1178 // currently animating away. Stop the 1179 // animation right now -- it is not needed, 1180 // and we can't wait any more on destroying 1181 // the fragment. 1182 View v = f.mAnimatingAway; 1183 f.mAnimatingAway = null; 1184 v.clearAnimation(); 1185 } 1186 } 1187 if (f.mAnimatingAway != null) { 1188 // We are waiting for the fragment's view to finish 1189 // animating away. Just make a note of the state 1190 // the fragment now should move to once the animation 1191 // is done. 1192 f.mStateAfterAnimating = newState; 1193 newState = Fragment.CREATED; 1194 } else { 1195 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1196 if (!f.mRetaining) { 1197 f.performDestroy(); 1198 } 1199 1200 f.mCalled = false; 1201 f.onDetach(); 1202 if (!f.mCalled) { 1203 throw new SuperNotCalledException("Fragment " + f 1204 + " did not call through to super.onDetach()"); 1205 } 1206 if (!keepActive) { 1207 if (!f.mRetaining) { 1208 makeInactive(f); 1209 } else { 1210 f.mHost = null; 1211 f.mParentFragment = null; 1212 f.mFragmentManager = null; 1213 f.mChildFragmentManager = null; 1214 } 1215 } 1216 } 1217 } 1218 } 1219 } 1220 1221 f.mState = newState; 1222 } 1223 1224 void moveToState(Fragment f) { 1225 moveToState(f, mCurState, 0, 0, false); 1226 } 1227 1228 void moveToState(int newState, boolean always) { 1229 moveToState(newState, 0, 0, always); 1230 } 1231 1232 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1233 if (mHost == null && newState != Fragment.INITIALIZING) { 1234 throw new IllegalStateException("No host"); 1235 } 1236 1237 if (!always && mCurState == newState) { 1238 return; 1239 } 1240 1241 mCurState = newState; 1242 if (mActive != null) { 1243 boolean loadersRunning = false; 1244 for (int i=0; i<mActive.size(); i++) { 1245 Fragment f = mActive.get(i); 1246 if (f != null) { 1247 moveToState(f, newState, transit, transitStyle, false); 1248 if (f.mLoaderManager != null) { 1249 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1250 } 1251 } 1252 } 1253 1254 if (!loadersRunning) { 1255 startPendingDeferredFragments(); 1256 } 1257 1258 if (mNeedMenuInvalidate && mHost != null && mCurState == Fragment.RESUMED) { 1259 mHost.onSupportInvalidateOptionsMenu(); 1260 mNeedMenuInvalidate = false; 1261 } 1262 } 1263 } 1264 1265 void startPendingDeferredFragments() { 1266 if (mActive == null) return; 1267 1268 for (int i=0; i<mActive.size(); i++) { 1269 Fragment f = mActive.get(i); 1270 if (f != null) { 1271 performPendingDeferredStart(f); 1272 } 1273 } 1274 } 1275 1276 void makeActive(Fragment f) { 1277 if (f.mIndex >= 0) { 1278 return; 1279 } 1280 1281 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1282 if (mActive == null) { 1283 mActive = new ArrayList<Fragment>(); 1284 } 1285 f.setIndex(mActive.size(), mParent); 1286 mActive.add(f); 1287 1288 } else { 1289 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent); 1290 mActive.set(f.mIndex, f); 1291 } 1292 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1293 } 1294 1295 void makeInactive(Fragment f) { 1296 if (f.mIndex < 0) { 1297 return; 1298 } 1299 1300 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1301 mActive.set(f.mIndex, null); 1302 if (mAvailIndices == null) { 1303 mAvailIndices = new ArrayList<Integer>(); 1304 } 1305 mAvailIndices.add(f.mIndex); 1306 mHost.inactivateFragment(f.mWho); 1307 f.initState(); 1308 } 1309 1310 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1311 if (mAdded == null) { 1312 mAdded = new ArrayList<Fragment>(); 1313 } 1314 if (DEBUG) Log.v(TAG, "add: " + fragment); 1315 makeActive(fragment); 1316 if (!fragment.mDetached) { 1317 if (mAdded.contains(fragment)) { 1318 throw new IllegalStateException("Fragment already added: " + fragment); 1319 } 1320 mAdded.add(fragment); 1321 fragment.mAdded = true; 1322 fragment.mRemoving = false; 1323 if (fragment.mHasMenu && fragment.mMenuVisible) { 1324 mNeedMenuInvalidate = true; 1325 } 1326 if (moveToStateNow) { 1327 moveToState(fragment); 1328 } 1329 } 1330 } 1331 1332 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1333 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1334 final boolean inactive = !fragment.isInBackStack(); 1335 if (!fragment.mDetached || inactive) { 1336 if (mAdded != null) { 1337 mAdded.remove(fragment); 1338 } 1339 if (fragment.mHasMenu && fragment.mMenuVisible) { 1340 mNeedMenuInvalidate = true; 1341 } 1342 fragment.mAdded = false; 1343 fragment.mRemoving = true; 1344 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1345 transition, transitionStyle, false); 1346 } 1347 } 1348 1349 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1350 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1351 if (!fragment.mHidden) { 1352 fragment.mHidden = true; 1353 if (fragment.mView != null) { 1354 Animation anim = loadAnimation(fragment, transition, false, 1355 transitionStyle); 1356 if (anim != null) { 1357 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1358 fragment.mView.startAnimation(anim); 1359 } 1360 fragment.mView.setVisibility(View.GONE); 1361 } 1362 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1363 mNeedMenuInvalidate = true; 1364 } 1365 fragment.onHiddenChanged(true); 1366 } 1367 } 1368 1369 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1370 if (DEBUG) Log.v(TAG, "show: " + fragment); 1371 if (fragment.mHidden) { 1372 fragment.mHidden = false; 1373 if (fragment.mView != null) { 1374 Animation anim = loadAnimation(fragment, transition, true, 1375 transitionStyle); 1376 if (anim != null) { 1377 setHWLayerAnimListenerIfAlpha(fragment.mView, anim); 1378 fragment.mView.startAnimation(anim); 1379 } 1380 fragment.mView.setVisibility(View.VISIBLE); 1381 } 1382 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1383 mNeedMenuInvalidate = true; 1384 } 1385 fragment.onHiddenChanged(false); 1386 } 1387 } 1388 1389 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1390 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1391 if (!fragment.mDetached) { 1392 fragment.mDetached = true; 1393 if (fragment.mAdded) { 1394 // We are not already in back stack, so need to remove the fragment. 1395 if (mAdded != null) { 1396 if (DEBUG) Log.v(TAG, "remove from detach: " + fragment); 1397 mAdded.remove(fragment); 1398 } 1399 if (fragment.mHasMenu && fragment.mMenuVisible) { 1400 mNeedMenuInvalidate = true; 1401 } 1402 fragment.mAdded = false; 1403 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1404 } 1405 } 1406 } 1407 1408 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1409 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1410 if (fragment.mDetached) { 1411 fragment.mDetached = false; 1412 if (!fragment.mAdded) { 1413 if (mAdded == null) { 1414 mAdded = new ArrayList<Fragment>(); 1415 } 1416 if (mAdded.contains(fragment)) { 1417 throw new IllegalStateException("Fragment already added: " + fragment); 1418 } 1419 if (DEBUG) Log.v(TAG, "add from attach: " + fragment); 1420 mAdded.add(fragment); 1421 fragment.mAdded = true; 1422 if (fragment.mHasMenu && fragment.mMenuVisible) { 1423 mNeedMenuInvalidate = true; 1424 } 1425 moveToState(fragment, mCurState, transition, transitionStyle, false); 1426 } 1427 } 1428 } 1429 1430 public Fragment findFragmentById(int id) { 1431 if (mAdded != null) { 1432 // First look through added fragments. 1433 for (int i=mAdded.size()-1; i>=0; i--) { 1434 Fragment f = mAdded.get(i); 1435 if (f != null && f.mFragmentId == id) { 1436 return f; 1437 } 1438 } 1439 } 1440 if (mActive != null) { 1441 // Now for any known fragment. 1442 for (int i=mActive.size()-1; i>=0; i--) { 1443 Fragment f = mActive.get(i); 1444 if (f != null && f.mFragmentId == id) { 1445 return f; 1446 } 1447 } 1448 } 1449 return null; 1450 } 1451 1452 public Fragment findFragmentByTag(String tag) { 1453 if (mAdded != null && tag != null) { 1454 // First look through added fragments. 1455 for (int i=mAdded.size()-1; i>=0; i--) { 1456 Fragment f = mAdded.get(i); 1457 if (f != null && tag.equals(f.mTag)) { 1458 return f; 1459 } 1460 } 1461 } 1462 if (mActive != null && tag != null) { 1463 // Now for any known fragment. 1464 for (int i=mActive.size()-1; i>=0; i--) { 1465 Fragment f = mActive.get(i); 1466 if (f != null && tag.equals(f.mTag)) { 1467 return f; 1468 } 1469 } 1470 } 1471 return null; 1472 } 1473 1474 public Fragment findFragmentByWho(String who) { 1475 if (mActive != null && who != null) { 1476 for (int i=mActive.size()-1; i>=0; i--) { 1477 Fragment f = mActive.get(i); 1478 if (f != null && (f=f.findFragmentByWho(who)) != null) { 1479 return f; 1480 } 1481 } 1482 } 1483 return null; 1484 } 1485 1486 private void checkStateLoss() { 1487 if (mStateSaved) { 1488 throw new IllegalStateException( 1489 "Can not perform this action after onSaveInstanceState"); 1490 } 1491 if (mNoTransactionsBecause != null) { 1492 throw new IllegalStateException( 1493 "Can not perform this action inside of " + mNoTransactionsBecause); 1494 } 1495 } 1496 1497 /** 1498 * Adds an action to the queue of pending actions. 1499 * 1500 * @param action the action to add 1501 * @param allowStateLoss whether to allow loss of state information 1502 * @throws IllegalStateException if the activity has been destroyed 1503 */ 1504 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1505 if (!allowStateLoss) { 1506 checkStateLoss(); 1507 } 1508 synchronized (this) { 1509 if (mDestroyed || mHost == null) { 1510 throw new IllegalStateException("Activity has been destroyed"); 1511 } 1512 if (mPendingActions == null) { 1513 mPendingActions = new ArrayList<Runnable>(); 1514 } 1515 mPendingActions.add(action); 1516 if (mPendingActions.size() == 1) { 1517 mHost.getHandler().removeCallbacks(mExecCommit); 1518 mHost.getHandler().post(mExecCommit); 1519 } 1520 } 1521 } 1522 1523 public int allocBackStackIndex(BackStackRecord bse) { 1524 synchronized (this) { 1525 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1526 if (mBackStackIndices == null) { 1527 mBackStackIndices = new ArrayList<BackStackRecord>(); 1528 } 1529 int index = mBackStackIndices.size(); 1530 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1531 mBackStackIndices.add(bse); 1532 return index; 1533 1534 } else { 1535 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1536 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1537 mBackStackIndices.set(index, bse); 1538 return index; 1539 } 1540 } 1541 } 1542 1543 public void setBackStackIndex(int index, BackStackRecord bse) { 1544 synchronized (this) { 1545 if (mBackStackIndices == null) { 1546 mBackStackIndices = new ArrayList<BackStackRecord>(); 1547 } 1548 int N = mBackStackIndices.size(); 1549 if (index < N) { 1550 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1551 mBackStackIndices.set(index, bse); 1552 } else { 1553 while (N < index) { 1554 mBackStackIndices.add(null); 1555 if (mAvailBackStackIndices == null) { 1556 mAvailBackStackIndices = new ArrayList<Integer>(); 1557 } 1558 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1559 mAvailBackStackIndices.add(N); 1560 N++; 1561 } 1562 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1563 mBackStackIndices.add(bse); 1564 } 1565 } 1566 } 1567 1568 public void freeBackStackIndex(int index) { 1569 synchronized (this) { 1570 mBackStackIndices.set(index, null); 1571 if (mAvailBackStackIndices == null) { 1572 mAvailBackStackIndices = new ArrayList<Integer>(); 1573 } 1574 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1575 mAvailBackStackIndices.add(index); 1576 } 1577 } 1578 1579 /** 1580 * Only call from main thread! 1581 */ 1582 public boolean execPendingActions() { 1583 if (mExecutingActions) { 1584 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1585 } 1586 1587 if (Looper.myLooper() != mHost.getHandler().getLooper()) { 1588 throw new IllegalStateException("Must be called from main thread of process"); 1589 } 1590 1591 boolean didSomething = false; 1592 1593 while (true) { 1594 int numActions; 1595 1596 synchronized (this) { 1597 if (mPendingActions == null || mPendingActions.size() == 0) { 1598 break; 1599 } 1600 1601 numActions = mPendingActions.size(); 1602 if (mTmpActions == null || mTmpActions.length < numActions) { 1603 mTmpActions = new Runnable[numActions]; 1604 } 1605 mPendingActions.toArray(mTmpActions); 1606 mPendingActions.clear(); 1607 mHost.getHandler().removeCallbacks(mExecCommit); 1608 } 1609 1610 mExecutingActions = true; 1611 for (int i=0; i<numActions; i++) { 1612 mTmpActions[i].run(); 1613 mTmpActions[i] = null; 1614 } 1615 mExecutingActions = false; 1616 didSomething = true; 1617 } 1618 1619 if (mHavePendingDeferredStart) { 1620 boolean loadersRunning = false; 1621 for (int i=0; i<mActive.size(); i++) { 1622 Fragment f = mActive.get(i); 1623 if (f != null && f.mLoaderManager != null) { 1624 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1625 } 1626 } 1627 if (!loadersRunning) { 1628 mHavePendingDeferredStart = false; 1629 startPendingDeferredFragments(); 1630 } 1631 } 1632 return didSomething; 1633 } 1634 1635 void reportBackStackChanged() { 1636 if (mBackStackChangeListeners != null) { 1637 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1638 mBackStackChangeListeners.get(i).onBackStackChanged(); 1639 } 1640 } 1641 } 1642 1643 void addBackStackState(BackStackRecord state) { 1644 if (mBackStack == null) { 1645 mBackStack = new ArrayList<BackStackRecord>(); 1646 } 1647 mBackStack.add(state); 1648 reportBackStackChanged(); 1649 } 1650 1651 @SuppressWarnings("unused") 1652 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1653 if (mBackStack == null) { 1654 return false; 1655 } 1656 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1657 int last = mBackStack.size()-1; 1658 if (last < 0) { 1659 return false; 1660 } 1661 final BackStackRecord bss = mBackStack.remove(last); 1662 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1663 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1664 bss.calculateBackFragments(firstOutFragments, lastInFragments); 1665 bss.popFromBackStack(true, null, firstOutFragments, lastInFragments); 1666 reportBackStackChanged(); 1667 } else { 1668 int index = -1; 1669 if (name != null || id >= 0) { 1670 // If a name or ID is specified, look for that place in 1671 // the stack. 1672 index = mBackStack.size()-1; 1673 while (index >= 0) { 1674 BackStackRecord bss = mBackStack.get(index); 1675 if (name != null && name.equals(bss.getName())) { 1676 break; 1677 } 1678 if (id >= 0 && id == bss.mIndex) { 1679 break; 1680 } 1681 index--; 1682 } 1683 if (index < 0) { 1684 return false; 1685 } 1686 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1687 index--; 1688 // Consume all following entries that match. 1689 while (index >= 0) { 1690 BackStackRecord bss = mBackStack.get(index); 1691 if ((name != null && name.equals(bss.getName())) 1692 || (id >= 0 && id == bss.mIndex)) { 1693 index--; 1694 continue; 1695 } 1696 break; 1697 } 1698 } 1699 } 1700 if (index == mBackStack.size()-1) { 1701 return false; 1702 } 1703 final ArrayList<BackStackRecord> states 1704 = new ArrayList<BackStackRecord>(); 1705 for (int i=mBackStack.size()-1; i>index; i--) { 1706 states.add(mBackStack.remove(i)); 1707 } 1708 final int LAST = states.size()-1; 1709 SparseArray<Fragment> firstOutFragments = new SparseArray<Fragment>(); 1710 SparseArray<Fragment> lastInFragments = new SparseArray<Fragment>(); 1711 for (int i=0; i<=LAST; i++) { 1712 states.get(i).calculateBackFragments(firstOutFragments, lastInFragments); 1713 } 1714 BackStackRecord.TransitionState state = null; 1715 for (int i=0; i<=LAST; i++) { 1716 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1717 state = states.get(i).popFromBackStack(i == LAST, state, 1718 firstOutFragments, lastInFragments); 1719 } 1720 reportBackStackChanged(); 1721 } 1722 return true; 1723 } 1724 1725 ArrayList<Fragment> retainNonConfig() { 1726 ArrayList<Fragment> fragments = null; 1727 if (mActive != null) { 1728 for (int i=0; i<mActive.size(); i++) { 1729 Fragment f = mActive.get(i); 1730 if (f != null && f.mRetainInstance) { 1731 if (fragments == null) { 1732 fragments = new ArrayList<Fragment>(); 1733 } 1734 fragments.add(f); 1735 f.mRetaining = true; 1736 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1737 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1738 } 1739 } 1740 } 1741 return fragments; 1742 } 1743 1744 void saveFragmentViewState(Fragment f) { 1745 if (f.mInnerView == null) { 1746 return; 1747 } 1748 if (mStateArray == null) { 1749 mStateArray = new SparseArray<Parcelable>(); 1750 } else { 1751 mStateArray.clear(); 1752 } 1753 f.mInnerView.saveHierarchyState(mStateArray); 1754 if (mStateArray.size() > 0) { 1755 f.mSavedViewState = mStateArray; 1756 mStateArray = null; 1757 } 1758 } 1759 1760 Bundle saveFragmentBasicState(Fragment f) { 1761 Bundle result = null; 1762 1763 if (mStateBundle == null) { 1764 mStateBundle = new Bundle(); 1765 } 1766 f.performSaveInstanceState(mStateBundle); 1767 if (!mStateBundle.isEmpty()) { 1768 result = mStateBundle; 1769 mStateBundle = null; 1770 } 1771 1772 if (f.mView != null) { 1773 saveFragmentViewState(f); 1774 } 1775 if (f.mSavedViewState != null) { 1776 if (result == null) { 1777 result = new Bundle(); 1778 } 1779 result.putSparseParcelableArray( 1780 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1781 } 1782 if (!f.mUserVisibleHint) { 1783 if (result == null) { 1784 result = new Bundle(); 1785 } 1786 // Only add this if it's not the default value 1787 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1788 } 1789 1790 return result; 1791 } 1792 1793 Parcelable saveAllState() { 1794 // Make sure all pending operations have now been executed to get 1795 // our state update-to-date. 1796 execPendingActions(); 1797 1798 if (HONEYCOMB) { 1799 // As of Honeycomb, we save state after pausing. Prior to that 1800 // it is before pausing. With fragments this is an issue, since 1801 // there are many things you may do after pausing but before 1802 // stopping that change the fragment state. For those older 1803 // devices, we will not at this point say that we have saved 1804 // the state, so we will allow them to continue doing fragment 1805 // transactions. This retains the same semantics as Honeycomb, 1806 // though you do have the risk of losing the very most recent state 1807 // if the process is killed... we'll live with that. 1808 mStateSaved = true; 1809 } 1810 1811 if (mActive == null || mActive.size() <= 0) { 1812 return null; 1813 } 1814 1815 // First collect all active fragments. 1816 int N = mActive.size(); 1817 FragmentState[] active = new FragmentState[N]; 1818 boolean haveFragments = false; 1819 for (int i=0; i<N; i++) { 1820 Fragment f = mActive.get(i); 1821 if (f != null) { 1822 if (f.mIndex < 0) { 1823 throwException(new IllegalStateException( 1824 "Failure saving state: active " + f 1825 + " has cleared index: " + f.mIndex)); 1826 } 1827 1828 haveFragments = true; 1829 1830 FragmentState fs = new FragmentState(f); 1831 active[i] = fs; 1832 1833 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1834 fs.mSavedFragmentState = saveFragmentBasicState(f); 1835 1836 if (f.mTarget != null) { 1837 if (f.mTarget.mIndex < 0) { 1838 throwException(new IllegalStateException( 1839 "Failure saving state: " + f 1840 + " has target not in fragment manager: " + f.mTarget)); 1841 } 1842 if (fs.mSavedFragmentState == null) { 1843 fs.mSavedFragmentState = new Bundle(); 1844 } 1845 putFragment(fs.mSavedFragmentState, 1846 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1847 if (f.mTargetRequestCode != 0) { 1848 fs.mSavedFragmentState.putInt( 1849 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1850 f.mTargetRequestCode); 1851 } 1852 } 1853 1854 } else { 1855 fs.mSavedFragmentState = f.mSavedFragmentState; 1856 } 1857 1858 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1859 + fs.mSavedFragmentState); 1860 } 1861 } 1862 1863 if (!haveFragments) { 1864 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1865 return null; 1866 } 1867 1868 int[] added = null; 1869 BackStackState[] backStack = null; 1870 1871 // Build list of currently added fragments. 1872 if (mAdded != null) { 1873 N = mAdded.size(); 1874 if (N > 0) { 1875 added = new int[N]; 1876 for (int i=0; i<N; i++) { 1877 added[i] = mAdded.get(i).mIndex; 1878 if (added[i] < 0) { 1879 throwException(new IllegalStateException( 1880 "Failure saving state: active " + mAdded.get(i) 1881 + " has cleared index: " + added[i])); 1882 } 1883 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1884 + ": " + mAdded.get(i)); 1885 } 1886 } 1887 } 1888 1889 // Now save back stack. 1890 if (mBackStack != null) { 1891 N = mBackStack.size(); 1892 if (N > 0) { 1893 backStack = new BackStackState[N]; 1894 for (int i=0; i<N; i++) { 1895 backStack[i] = new BackStackState(mBackStack.get(i)); 1896 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1897 + ": " + mBackStack.get(i)); 1898 } 1899 } 1900 } 1901 1902 FragmentManagerState fms = new FragmentManagerState(); 1903 fms.mActive = active; 1904 fms.mAdded = added; 1905 fms.mBackStack = backStack; 1906 return fms; 1907 } 1908 1909 void restoreAllState(Parcelable state, List<Fragment> nonConfig) { 1910 // If there is no saved state at all, then there can not be 1911 // any nonConfig fragments either, so that is that. 1912 if (state == null) return; 1913 FragmentManagerState fms = (FragmentManagerState)state; 1914 if (fms.mActive == null) return; 1915 1916 // First re-attach any non-config instances we are retaining back 1917 // to their saved state, so we don't try to instantiate them again. 1918 if (nonConfig != null) { 1919 for (int i=0; i<nonConfig.size(); i++) { 1920 Fragment f = nonConfig.get(i); 1921 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1922 FragmentState fs = fms.mActive[f.mIndex]; 1923 fs.mInstance = f; 1924 f.mSavedViewState = null; 1925 f.mBackStackNesting = 0; 1926 f.mInLayout = false; 1927 f.mAdded = false; 1928 f.mTarget = null; 1929 if (fs.mSavedFragmentState != null) { 1930 fs.mSavedFragmentState.setClassLoader(mHost.getContext().getClassLoader()); 1931 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1932 FragmentManagerImpl.VIEW_STATE_TAG); 1933 f.mSavedFragmentState = fs.mSavedFragmentState; 1934 } 1935 } 1936 } 1937 1938 // Build the full list of active fragments, instantiating them from 1939 // their saved state. 1940 mActive = new ArrayList<Fragment>(fms.mActive.length); 1941 if (mAvailIndices != null) { 1942 mAvailIndices.clear(); 1943 } 1944 for (int i=0; i<fms.mActive.length; i++) { 1945 FragmentState fs = fms.mActive[i]; 1946 if (fs != null) { 1947 Fragment f = fs.instantiate(mHost, mParent); 1948 if (DEBUG) Log.v(TAG, "restoreAllState: active #" + i + ": " + f); 1949 mActive.add(f); 1950 // Now that the fragment is instantiated (or came from being 1951 // retained above), clear mInstance in case we end up re-restoring 1952 // from this FragmentState again. 1953 fs.mInstance = null; 1954 } else { 1955 mActive.add(null); 1956 if (mAvailIndices == null) { 1957 mAvailIndices = new ArrayList<Integer>(); 1958 } 1959 if (DEBUG) Log.v(TAG, "restoreAllState: avail #" + i); 1960 mAvailIndices.add(i); 1961 } 1962 } 1963 1964 // Update the target of all retained fragments. 1965 if (nonConfig != null) { 1966 for (int i=0; i<nonConfig.size(); i++) { 1967 Fragment f = nonConfig.get(i); 1968 if (f.mTargetIndex >= 0) { 1969 if (f.mTargetIndex < mActive.size()) { 1970 f.mTarget = mActive.get(f.mTargetIndex); 1971 } else { 1972 Log.w(TAG, "Re-attaching retained fragment " + f 1973 + " target no longer exists: " + f.mTargetIndex); 1974 f.mTarget = null; 1975 } 1976 } 1977 } 1978 } 1979 1980 // Build the list of currently added fragments. 1981 if (fms.mAdded != null) { 1982 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1983 for (int i=0; i<fms.mAdded.length; i++) { 1984 Fragment f = mActive.get(fms.mAdded[i]); 1985 if (f == null) { 1986 throwException(new IllegalStateException( 1987 "No instantiated fragment for index #" + fms.mAdded[i])); 1988 } 1989 f.mAdded = true; 1990 if (DEBUG) Log.v(TAG, "restoreAllState: added #" + i + ": " + f); 1991 if (mAdded.contains(f)) { 1992 throw new IllegalStateException("Already added!"); 1993 } 1994 mAdded.add(f); 1995 } 1996 } else { 1997 mAdded = null; 1998 } 1999 2000 // Build the back stack. 2001 if (fms.mBackStack != null) { 2002 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 2003 for (int i=0; i<fms.mBackStack.length; i++) { 2004 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 2005 if (DEBUG) { 2006 Log.v(TAG, "restoreAllState: back stack #" + i 2007 + " (index " + bse.mIndex + "): " + bse); 2008 LogWriter logw = new LogWriter(TAG); 2009 PrintWriter pw = new PrintWriter(logw); 2010 bse.dump(" ", pw, false); 2011 } 2012 mBackStack.add(bse); 2013 if (bse.mIndex >= 0) { 2014 setBackStackIndex(bse.mIndex, bse); 2015 } 2016 } 2017 } else { 2018 mBackStack = null; 2019 } 2020 } 2021 2022 public void attachController(FragmentHostCallback host, 2023 FragmentContainer container, Fragment parent) { 2024 if (mHost != null) throw new IllegalStateException("Already attached"); 2025 mHost = host; 2026 mContainer = container; 2027 mParent = parent; 2028 } 2029 2030 public void noteStateNotSaved() { 2031 mStateSaved = false; 2032 } 2033 2034 public void dispatchCreate() { 2035 mStateSaved = false; 2036 moveToState(Fragment.CREATED, false); 2037 } 2038 2039 public void dispatchActivityCreated() { 2040 mStateSaved = false; 2041 moveToState(Fragment.ACTIVITY_CREATED, false); 2042 } 2043 2044 public void dispatchStart() { 2045 mStateSaved = false; 2046 moveToState(Fragment.STARTED, false); 2047 } 2048 2049 public void dispatchResume() { 2050 mStateSaved = false; 2051 moveToState(Fragment.RESUMED, false); 2052 } 2053 2054 public void dispatchPause() { 2055 moveToState(Fragment.STARTED, false); 2056 } 2057 2058 public void dispatchStop() { 2059 // See saveAllState() for the explanation of this. We do this for 2060 // all platform versions, to keep our behavior more consistent between 2061 // them. 2062 mStateSaved = true; 2063 2064 moveToState(Fragment.STOPPED, false); 2065 } 2066 2067 public void dispatchReallyStop() { 2068 moveToState(Fragment.ACTIVITY_CREATED, false); 2069 } 2070 2071 public void dispatchDestroyView() { 2072 moveToState(Fragment.CREATED, false); 2073 } 2074 2075 public void dispatchDestroy() { 2076 mDestroyed = true; 2077 execPendingActions(); 2078 moveToState(Fragment.INITIALIZING, false); 2079 mHost = null; 2080 mContainer = null; 2081 mParent = null; 2082 } 2083 2084 public void dispatchConfigurationChanged(Configuration newConfig) { 2085 if (mAdded != null) { 2086 for (int i=0; i<mAdded.size(); i++) { 2087 Fragment f = mAdded.get(i); 2088 if (f != null) { 2089 f.performConfigurationChanged(newConfig); 2090 } 2091 } 2092 } 2093 } 2094 2095 public void dispatchLowMemory() { 2096 if (mAdded != null) { 2097 for (int i=0; i<mAdded.size(); i++) { 2098 Fragment f = mAdded.get(i); 2099 if (f != null) { 2100 f.performLowMemory(); 2101 } 2102 } 2103 } 2104 } 2105 2106 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 2107 boolean show = false; 2108 ArrayList<Fragment> newMenus = null; 2109 if (mAdded != null) { 2110 for (int i=0; i<mAdded.size(); i++) { 2111 Fragment f = mAdded.get(i); 2112 if (f != null) { 2113 if (f.performCreateOptionsMenu(menu, inflater)) { 2114 show = true; 2115 if (newMenus == null) { 2116 newMenus = new ArrayList<Fragment>(); 2117 } 2118 newMenus.add(f); 2119 } 2120 } 2121 } 2122 } 2123 2124 if (mCreatedMenus != null) { 2125 for (int i=0; i<mCreatedMenus.size(); i++) { 2126 Fragment f = mCreatedMenus.get(i); 2127 if (newMenus == null || !newMenus.contains(f)) { 2128 f.onDestroyOptionsMenu(); 2129 } 2130 } 2131 } 2132 2133 mCreatedMenus = newMenus; 2134 2135 return show; 2136 } 2137 2138 public boolean dispatchPrepareOptionsMenu(Menu menu) { 2139 boolean show = false; 2140 if (mAdded != null) { 2141 for (int i=0; i<mAdded.size(); i++) { 2142 Fragment f = mAdded.get(i); 2143 if (f != null) { 2144 if (f.performPrepareOptionsMenu(menu)) { 2145 show = true; 2146 } 2147 } 2148 } 2149 } 2150 return show; 2151 } 2152 2153 public boolean dispatchOptionsItemSelected(MenuItem item) { 2154 if (mAdded != null) { 2155 for (int i=0; i<mAdded.size(); i++) { 2156 Fragment f = mAdded.get(i); 2157 if (f != null) { 2158 if (f.performOptionsItemSelected(item)) { 2159 return true; 2160 } 2161 } 2162 } 2163 } 2164 return false; 2165 } 2166 2167 public boolean dispatchContextItemSelected(MenuItem item) { 2168 if (mAdded != null) { 2169 for (int i=0; i<mAdded.size(); i++) { 2170 Fragment f = mAdded.get(i); 2171 if (f != null) { 2172 if (f.performContextItemSelected(item)) { 2173 return true; 2174 } 2175 } 2176 } 2177 } 2178 return false; 2179 } 2180 2181 public void dispatchOptionsMenuClosed(Menu menu) { 2182 if (mAdded != null) { 2183 for (int i=0; i<mAdded.size(); i++) { 2184 Fragment f = mAdded.get(i); 2185 if (f != null) { 2186 f.performOptionsMenuClosed(menu); 2187 } 2188 } 2189 } 2190 } 2191 2192 public static int reverseTransit(int transit) { 2193 int rev = 0; 2194 switch (transit) { 2195 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2196 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 2197 break; 2198 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2199 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 2200 break; 2201 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2202 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 2203 break; 2204 } 2205 return rev; 2206 2207 } 2208 2209 public static final int ANIM_STYLE_OPEN_ENTER = 1; 2210 public static final int ANIM_STYLE_OPEN_EXIT = 2; 2211 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 2212 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 2213 public static final int ANIM_STYLE_FADE_ENTER = 5; 2214 public static final int ANIM_STYLE_FADE_EXIT = 6; 2215 2216 public static int transitToStyleIndex(int transit, boolean enter) { 2217 int animAttr = -1; 2218 switch (transit) { 2219 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 2220 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 2221 break; 2222 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 2223 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 2224 break; 2225 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 2226 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 2227 break; 2228 } 2229 return animAttr; 2230 } 2231 2232 @Override 2233 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 2234 if (!"fragment".equals(name)) { 2235 return null; 2236 } 2237 2238 String fname = attrs.getAttributeValue(null, "class"); 2239 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 2240 if (fname == null) { 2241 fname = a.getString(FragmentTag.Fragment_name); 2242 } 2243 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 2244 String tag = a.getString(FragmentTag.Fragment_tag); 2245 a.recycle(); 2246 2247 if (!Fragment.isSupportFragmentClass(mHost.getContext(), fname)) { 2248 // Invalid support lib fragment; let the device's framework handle it. 2249 // This will allow android.app.Fragments to do the right thing. 2250 return null; 2251 } 2252 2253 int containerId = parent != null ? parent.getId() : 0; 2254 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 2255 throw new IllegalArgumentException(attrs.getPositionDescription() 2256 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 2257 } 2258 2259 // If we restored from a previous state, we may already have 2260 // instantiated this fragment from the state and should use 2261 // that instance instead of making a new one. 2262 Fragment fragment = id != View.NO_ID ? findFragmentById(id) : null; 2263 if (fragment == null && tag != null) { 2264 fragment = findFragmentByTag(tag); 2265 } 2266 if (fragment == null && containerId != View.NO_ID) { 2267 fragment = findFragmentById(containerId); 2268 } 2269 2270 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 2271 + Integer.toHexString(id) + " fname=" + fname 2272 + " existing=" + fragment); 2273 if (fragment == null) { 2274 fragment = Fragment.instantiate(context, fname); 2275 fragment.mFromLayout = true; 2276 fragment.mFragmentId = id != 0 ? id : containerId; 2277 fragment.mContainerId = containerId; 2278 fragment.mTag = tag; 2279 fragment.mInLayout = true; 2280 fragment.mFragmentManager = this; 2281 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2282 addFragment(fragment, true); 2283 2284 } else if (fragment.mInLayout) { 2285 // A fragment already exists and it is not one we restored from 2286 // previous state. 2287 throw new IllegalArgumentException(attrs.getPositionDescription() 2288 + ": Duplicate id 0x" + Integer.toHexString(id) 2289 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 2290 + " with another fragment for " + fname); 2291 } else { 2292 // This fragment was retained from a previous instance; get it 2293 // going now. 2294 fragment.mInLayout = true; 2295 // If this fragment is newly instantiated (either right now, or 2296 // from last saved state), then give it the attributes to 2297 // initialize itself. 2298 if (!fragment.mRetaining) { 2299 fragment.onInflate(mHost.getContext(), attrs, fragment.mSavedFragmentState); 2300 } 2301 } 2302 2303 // If we haven't finished entering the CREATED state ourselves yet, 2304 // push the inflated child fragment along. 2305 if (mCurState < Fragment.CREATED && fragment.mFromLayout) { 2306 moveToState(fragment, Fragment.CREATED, 0, 0, false); 2307 } else { 2308 moveToState(fragment); 2309 } 2310 2311 if (fragment.mView == null) { 2312 throw new IllegalStateException("Fragment " + fname 2313 + " did not create a view."); 2314 } 2315 if (id != 0) { 2316 fragment.mView.setId(id); 2317 } 2318 if (fragment.mView.getTag() == null) { 2319 fragment.mView.setTag(tag); 2320 } 2321 return fragment.mView; 2322 } 2323 2324 LayoutInflaterFactory getLayoutInflaterFactory() { 2325 return this; 2326 } 2327 2328 static class FragmentTag { 2329 public static final int[] Fragment = { 2330 0x01010003, 0x010100d0, 0x010100d1 2331 }; 2332 public static final int Fragment_id = 1; 2333 public static final int Fragment_name = 0; 2334 public static final int Fragment_tag = 2; 2335 } 2336} 2337