FragmentManager.java revision 62bea2f1710be0d1a42c07109fd4307ded660d3b
1/* 2 * Copyright (C) 2010 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.app; 18 19import android.animation.Animator; 20import android.animation.AnimatorInflater; 21import android.animation.AnimatorListenerAdapter; 22import android.content.res.Configuration; 23import android.content.res.TypedArray; 24import android.os.Bundle; 25import android.os.Handler; 26import android.os.Looper; 27import android.os.Parcel; 28import android.os.Parcelable; 29import android.util.DebugUtils; 30import android.util.Log; 31import android.util.LogWriter; 32import android.util.SparseArray; 33import android.view.Menu; 34import android.view.MenuInflater; 35import android.view.MenuItem; 36import android.view.View; 37import android.view.ViewGroup; 38 39import java.io.FileDescriptor; 40import java.io.PrintWriter; 41import java.util.ArrayList; 42import java.util.Arrays; 43 44/** 45 * Interface for interacting with {@link Fragment} objects inside of an 46 * {@link Activity} 47 * 48 * <div class="special reference"> 49 * <h3>Developer Guides</h3> 50 * <p>For more information about using fragments, read the 51 * <a href="{@docRoot}guide/topics/fundamentals/fragments.html">Fragments</a> developer guide.</p> 52 * </div> 53 * 54 * While the FragmentManager API was introduced in 55 * {@link android.os.Build.VERSION_CODES#HONEYCOMB}, a version of the API 56 * at is also available for use on older platforms through 57 * {@link android.support.v4.app.FragmentActivity}. See the blog post 58 * <a href="http://android-developers.blogspot.com/2011/03/fragments-for-all.html"> 59 * Fragments For All</a> for more details. 60 */ 61public abstract class FragmentManager { 62 /** 63 * Representation of an entry on the fragment back stack, as created 64 * with {@link FragmentTransaction#addToBackStack(String) 65 * FragmentTransaction.addToBackStack()}. Entries can later be 66 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 67 * FragmentManager.getBackStackEntry()}. 68 * 69 * <p>Note that you should never hold on to a BackStackEntry object; 70 * the identifier as returned by {@link #getId} is the only thing that 71 * will be persisted across activity instances. 72 */ 73 public interface BackStackEntry { 74 /** 75 * Return the unique identifier for the entry. This is the only 76 * representation of the entry that will persist across activity 77 * instances. 78 */ 79 public int getId(); 80 81 /** 82 * Get the name that was supplied to 83 * {@link FragmentTransaction#addToBackStack(String) 84 * FragmentTransaction.addToBackStack(String)} when creating this entry. 85 */ 86 public String getName(); 87 88 /** 89 * Return the full bread crumb title resource identifier for the entry, 90 * or 0 if it does not have one. 91 */ 92 public int getBreadCrumbTitleRes(); 93 94 /** 95 * Return the short bread crumb title resource identifier for the entry, 96 * or 0 if it does not have one. 97 */ 98 public int getBreadCrumbShortTitleRes(); 99 100 /** 101 * Return the full bread crumb title for the entry, or null if it 102 * does not have one. 103 */ 104 public CharSequence getBreadCrumbTitle(); 105 106 /** 107 * Return the short bread crumb title for the entry, or null if it 108 * does not have one. 109 */ 110 public CharSequence getBreadCrumbShortTitle(); 111 } 112 113 /** 114 * Interface to watch for changes to the back stack. 115 */ 116 public interface OnBackStackChangedListener { 117 /** 118 * Called whenever the contents of the back stack change. 119 */ 120 public void onBackStackChanged(); 121 } 122 123 /** 124 * Start a series of edit operations on the Fragments associated with 125 * this FragmentManager. 126 * 127 * <p>Note: A fragment transaction can only be created/committed prior 128 * to an activity saving its state. If you try to commit a transaction 129 * after {@link Activity#onSaveInstanceState Activity.onSaveInstanceState()} 130 * (and prior to a following {@link Activity#onStart Activity.onStart} 131 * or {@link Activity#onResume Activity.onResume()}, you will get an error. 132 * This is because the framework takes care of saving your current fragments 133 * in the state, and if changes are made after the state is saved then they 134 * will be lost.</p> 135 */ 136 public abstract FragmentTransaction beginTransaction(); 137 138 /** @hide -- remove once prebuilts are in. */ 139 @Deprecated 140 public FragmentTransaction openTransaction() { 141 return beginTransaction(); 142 } 143 144 /** 145 * After a {@link FragmentTransaction} is committed with 146 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 147 * is scheduled to be executed asynchronously on the process's main thread. 148 * If you want to immediately executing any such pending operations, you 149 * can call this function (only from the main thread) to do so. Note that 150 * all callbacks and other related behavior will be done from within this 151 * call, so be careful about where this is called from. 152 * 153 * @return Returns true if there were any pending transactions to be 154 * executed. 155 */ 156 public abstract boolean executePendingTransactions(); 157 158 /** 159 * Finds a fragment that was identified by the given id either when inflated 160 * from XML or as the container ID when added in a transaction. This first 161 * searches through fragments that are currently added to the manager's 162 * activity; if no such fragment is found, then all fragments currently 163 * on the back stack associated with this ID are searched. 164 * @return The fragment if found or null otherwise. 165 */ 166 public abstract Fragment findFragmentById(int id); 167 168 /** 169 * Finds a fragment that was identified by the given tag either when inflated 170 * from XML or as supplied when added in a transaction. This first 171 * searches through fragments that are currently added to the manager's 172 * activity; if no such fragment is found, then all fragments currently 173 * on the back stack are searched. 174 * @return The fragment if found or null otherwise. 175 */ 176 public abstract Fragment findFragmentByTag(String tag); 177 178 /** 179 * Flag for {@link #popBackStack(String, int)} 180 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 181 * a back stack entry has been supplied, then all matching entries will 182 * be consumed until one that doesn't match is found or the bottom of 183 * the stack is reached. Otherwise, all entries up to but not including that entry 184 * will be removed. 185 */ 186 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 187 188 /** 189 * Pop the top state off the back stack. This function is asynchronous -- it 190 * enqueues the request to pop, but the action will not be performed until the 191 * application returns to its event loop. 192 */ 193 public abstract void popBackStack(); 194 195 /** 196 * Like {@link #popBackStack()}, but performs the operation immediately 197 * inside of the call. This is like calling {@link #executePendingTransactions()} 198 * afterwards. 199 * @return Returns true if there was something popped, else false. 200 */ 201 public abstract boolean popBackStackImmediate(); 202 203 /** 204 * Pop the last fragment transition from the manager's fragment 205 * back stack. If there is nothing to pop, false is returned. 206 * This function is asynchronous -- it enqueues the 207 * request to pop, but the action will not be performed until the application 208 * returns to its event loop. 209 * 210 * @param name If non-null, this is the name of a previous back state 211 * to look for; if found, all states up to that state will be popped. The 212 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 213 * the named state itself is popped. If null, only the top state is popped. 214 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 215 */ 216 public abstract void popBackStack(String name, int flags); 217 218 /** 219 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 220 * inside of the call. This is like calling {@link #executePendingTransactions()} 221 * afterwards. 222 * @return Returns true if there was something popped, else false. 223 */ 224 public abstract boolean popBackStackImmediate(String name, int flags); 225 226 /** 227 * Pop all back stack states up to the one with the given identifier. 228 * This function is asynchronous -- it enqueues the 229 * request to pop, but the action will not be performed until the application 230 * returns to its event loop. 231 * 232 * @param id Identifier of the stated to be popped. If no identifier exists, 233 * false is returned. 234 * The identifier is the number returned by 235 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 236 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 237 * the named state itself is popped. 238 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 239 */ 240 public abstract void popBackStack(int id, int flags); 241 242 /** 243 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 244 * inside of the call. This is like calling {@link #executePendingTransactions()} 245 * afterwards. 246 * @return Returns true if there was something popped, else false. 247 */ 248 public abstract boolean popBackStackImmediate(int id, int flags); 249 250 /** 251 * Return the number of entries currently in the back stack. 252 */ 253 public abstract int getBackStackEntryCount(); 254 255 /** 256 * Return the BackStackEntry at index <var>index</var> in the back stack; 257 * entries start index 0 being the bottom of the stack. 258 */ 259 public abstract BackStackEntry getBackStackEntryAt(int index); 260 261 /** 262 * Add a new listener for changes to the fragment back stack. 263 */ 264 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 265 266 /** 267 * Remove a listener that was previously added with 268 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 269 */ 270 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 271 272 /** 273 * Put a reference to a fragment in a Bundle. This Bundle can be 274 * persisted as saved state, and when later restoring 275 * {@link #getFragment(Bundle, String)} will return the current 276 * instance of the same fragment. 277 * 278 * @param bundle The bundle in which to put the fragment reference. 279 * @param key The name of the entry in the bundle. 280 * @param fragment The Fragment whose reference is to be stored. 281 */ 282 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 283 284 /** 285 * Retrieve the current Fragment instance for a reference previously 286 * placed with {@link #putFragment(Bundle, String, Fragment)}. 287 * 288 * @param bundle The bundle from which to retrieve the fragment reference. 289 * @param key The name of the entry in the bundle. 290 * @return Returns the current Fragment instance that is associated with 291 * the given reference. 292 */ 293 public abstract Fragment getFragment(Bundle bundle, String key); 294 295 /** 296 * Save the current instance state of the given Fragment. This can be 297 * used later when creating a new instance of the Fragment and adding 298 * it to the fragment manager, to have it create itself to match the 299 * current state returned here. Note that there are limits on how 300 * this can be used: 301 * 302 * <ul> 303 * <li>The Fragment must currently be attached to the FragmentManager. 304 * <li>A new Fragment created using this saved state must be the same class 305 * type as the Fragment it was created from. 306 * <li>The saved state can not contain dependencies on other fragments -- 307 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 308 * store a fragment reference because that reference may not be valid when 309 * this saved state is later used. Likewise the Fragment's target and 310 * result code are not included in this state. 311 * </ul> 312 * 313 * @param f The Fragment whose state is to be saved. 314 * @return The generated state. This will be null if there was no 315 * interesting state created by the fragment. 316 */ 317 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 318 319 /** 320 * Print the FragmentManager's state into the given stream. 321 * 322 * @param prefix Text to print at the front of each line. 323 * @param fd The raw file descriptor that the dump is being sent to. 324 * @param writer A PrintWriter to which the dump is to be set. 325 * @param args Additional arguments to the dump request. 326 */ 327 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 328 329 /** 330 * Control whether the framework's internal fragment manager debugging 331 * logs are turned on. If enabled, you will see output in logcat as 332 * the framework performs fragment operations. 333 */ 334 public static void enableDebugLogging(boolean enabled) { 335 FragmentManagerImpl.DEBUG = enabled; 336 } 337 338 /** 339 * Invalidate the attached activity's options menu as necessary. 340 * This may end up being deferred until we move to the resumed state. 341 */ 342 public void invalidateOptionsMenu() { } 343} 344 345final class FragmentManagerState implements Parcelable { 346 FragmentState[] mActive; 347 int[] mAdded; 348 BackStackState[] mBackStack; 349 350 public FragmentManagerState() { 351 } 352 353 public FragmentManagerState(Parcel in) { 354 mActive = in.createTypedArray(FragmentState.CREATOR); 355 mAdded = in.createIntArray(); 356 mBackStack = in.createTypedArray(BackStackState.CREATOR); 357 } 358 359 public int describeContents() { 360 return 0; 361 } 362 363 public void writeToParcel(Parcel dest, int flags) { 364 dest.writeTypedArray(mActive, flags); 365 dest.writeIntArray(mAdded); 366 dest.writeTypedArray(mBackStack, flags); 367 } 368 369 public static final Parcelable.Creator<FragmentManagerState> CREATOR 370 = new Parcelable.Creator<FragmentManagerState>() { 371 public FragmentManagerState createFromParcel(Parcel in) { 372 return new FragmentManagerState(in); 373 } 374 375 public FragmentManagerState[] newArray(int size) { 376 return new FragmentManagerState[size]; 377 } 378 }; 379} 380 381/** 382 * Callbacks from FragmentManagerImpl to its container. 383 */ 384interface FragmentContainer { 385 public View findViewById(int id); 386} 387 388/** 389 * Container for fragments associated with an activity. 390 */ 391final class FragmentManagerImpl extends FragmentManager { 392 static boolean DEBUG = false; 393 static final String TAG = "FragmentManager"; 394 395 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 396 static final String TARGET_STATE_TAG = "android:target_state"; 397 static final String VIEW_STATE_TAG = "android:view_state"; 398 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 399 400 ArrayList<Runnable> mPendingActions; 401 Runnable[] mTmpActions; 402 boolean mExecutingActions; 403 404 ArrayList<Fragment> mActive; 405 ArrayList<Fragment> mAdded; 406 ArrayList<Integer> mAvailIndices; 407 ArrayList<BackStackRecord> mBackStack; 408 ArrayList<Fragment> mCreatedMenus; 409 410 // Must be accessed while locked. 411 ArrayList<BackStackRecord> mBackStackIndices; 412 ArrayList<Integer> mAvailBackStackIndices; 413 414 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 415 416 int mCurState = Fragment.INITIALIZING; 417 Activity mActivity; 418 FragmentContainer mContainer; 419 Fragment mParent; 420 421 boolean mNeedMenuInvalidate; 422 boolean mStateSaved; 423 boolean mDestroyed; 424 String mNoTransactionsBecause; 425 boolean mHavePendingDeferredStart; 426 427 // Temporary vars for state save and restore. 428 Bundle mStateBundle = null; 429 SparseArray<Parcelable> mStateArray = null; 430 431 Runnable mExecCommit = new Runnable() { 432 @Override 433 public void run() { 434 execPendingActions(); 435 } 436 }; 437 438 private void throwException(RuntimeException ex) { 439 Log.e(TAG, ex.getMessage()); 440 LogWriter logw = new LogWriter(Log.ERROR, TAG); 441 PrintWriter pw = new PrintWriter(logw); 442 if (mActivity != null) { 443 Log.e(TAG, "Activity state:"); 444 try { 445 mActivity.dump(" ", null, pw, new String[] { }); 446 } catch (Exception e) { 447 Log.e(TAG, "Failed dumping state", e); 448 } 449 } else { 450 Log.e(TAG, "Fragment manager state:"); 451 try { 452 dump(" ", null, pw, new String[] { }); 453 } catch (Exception e) { 454 Log.e(TAG, "Failed dumping state", e); 455 } 456 } 457 throw ex; 458 } 459 460 @Override 461 public FragmentTransaction beginTransaction() { 462 return new BackStackRecord(this); 463 } 464 465 @Override 466 public boolean executePendingTransactions() { 467 return execPendingActions(); 468 } 469 470 @Override 471 public void popBackStack() { 472 enqueueAction(new Runnable() { 473 @Override public void run() { 474 popBackStackState(mActivity.mHandler, null, -1, 0); 475 } 476 }, false); 477 } 478 479 @Override 480 public boolean popBackStackImmediate() { 481 checkStateLoss(); 482 executePendingTransactions(); 483 return popBackStackState(mActivity.mHandler, null, -1, 0); 484 } 485 486 @Override 487 public void popBackStack(final String name, final int flags) { 488 enqueueAction(new Runnable() { 489 @Override public void run() { 490 popBackStackState(mActivity.mHandler, name, -1, flags); 491 } 492 }, false); 493 } 494 495 @Override 496 public boolean popBackStackImmediate(String name, int flags) { 497 checkStateLoss(); 498 executePendingTransactions(); 499 return popBackStackState(mActivity.mHandler, name, -1, flags); 500 } 501 502 @Override 503 public void popBackStack(final int id, final int flags) { 504 if (id < 0) { 505 throw new IllegalArgumentException("Bad id: " + id); 506 } 507 enqueueAction(new Runnable() { 508 @Override public void run() { 509 popBackStackState(mActivity.mHandler, null, id, flags); 510 } 511 }, false); 512 } 513 514 @Override 515 public boolean popBackStackImmediate(int id, int flags) { 516 checkStateLoss(); 517 executePendingTransactions(); 518 if (id < 0) { 519 throw new IllegalArgumentException("Bad id: " + id); 520 } 521 return popBackStackState(mActivity.mHandler, null, id, flags); 522 } 523 524 @Override 525 public int getBackStackEntryCount() { 526 return mBackStack != null ? mBackStack.size() : 0; 527 } 528 529 @Override 530 public BackStackEntry getBackStackEntryAt(int index) { 531 return mBackStack.get(index); 532 } 533 534 @Override 535 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 536 if (mBackStackChangeListeners == null) { 537 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 538 } 539 mBackStackChangeListeners.add(listener); 540 } 541 542 @Override 543 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 544 if (mBackStackChangeListeners != null) { 545 mBackStackChangeListeners.remove(listener); 546 } 547 } 548 549 @Override 550 public void putFragment(Bundle bundle, String key, Fragment fragment) { 551 if (fragment.mIndex < 0) { 552 throwException(new IllegalStateException("Fragment " + fragment 553 + " is not currently in the FragmentManager")); 554 } 555 bundle.putInt(key, fragment.mIndex); 556 } 557 558 @Override 559 public Fragment getFragment(Bundle bundle, String key) { 560 int index = bundle.getInt(key, -1); 561 if (index == -1) { 562 return null; 563 } 564 if (index >= mActive.size()) { 565 throwException(new IllegalStateException("Fragement no longer exists for key " 566 + key + ": index " + index)); 567 } 568 Fragment f = mActive.get(index); 569 if (f == null) { 570 throwException(new IllegalStateException("Fragement no longer exists for key " 571 + key + ": index " + index)); 572 } 573 return f; 574 } 575 576 @Override 577 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 578 if (fragment.mIndex < 0) { 579 throwException(new IllegalStateException("Fragment " + fragment 580 + " is not currently in the FragmentManager")); 581 } 582 if (fragment.mState > Fragment.INITIALIZING) { 583 Bundle result = saveFragmentBasicState(fragment); 584 return result != null ? new Fragment.SavedState(result) : null; 585 } 586 return null; 587 } 588 589 @Override 590 public String toString() { 591 StringBuilder sb = new StringBuilder(128); 592 sb.append("FragmentManager{"); 593 sb.append(Integer.toHexString(System.identityHashCode(this))); 594 sb.append(" in "); 595 if (mParent != null) { 596 DebugUtils.buildShortClassTag(mParent, sb); 597 } else { 598 DebugUtils.buildShortClassTag(mActivity, sb); 599 } 600 sb.append("}}"); 601 return sb.toString(); 602 } 603 604 @Override 605 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 606 String innerPrefix = prefix + " "; 607 608 int N; 609 if (mActive != null) { 610 N = mActive.size(); 611 if (N > 0) { 612 writer.print(prefix); writer.print("Active Fragments in "); 613 writer.print(Integer.toHexString(System.identityHashCode(this))); 614 writer.println(":"); 615 for (int i=0; i<N; i++) { 616 Fragment f = mActive.get(i); 617 writer.print(prefix); writer.print(" #"); writer.print(i); 618 writer.print(": "); writer.println(f); 619 if (f != null) { 620 f.dump(innerPrefix, fd, writer, args); 621 } 622 } 623 } 624 } 625 626 if (mAdded != null) { 627 N = mAdded.size(); 628 if (N > 0) { 629 writer.print(prefix); writer.println("Added Fragments:"); 630 for (int i=0; i<N; i++) { 631 Fragment f = mAdded.get(i); 632 writer.print(prefix); writer.print(" #"); writer.print(i); 633 writer.print(": "); writer.println(f.toString()); 634 } 635 } 636 } 637 638 if (mCreatedMenus != null) { 639 N = mCreatedMenus.size(); 640 if (N > 0) { 641 writer.print(prefix); writer.println("Fragments Created Menus:"); 642 for (int i=0; i<N; i++) { 643 Fragment f = mCreatedMenus.get(i); 644 writer.print(prefix); writer.print(" #"); writer.print(i); 645 writer.print(": "); writer.println(f.toString()); 646 } 647 } 648 } 649 650 if (mBackStack != null) { 651 N = mBackStack.size(); 652 if (N > 0) { 653 writer.print(prefix); writer.println("Back Stack:"); 654 for (int i=0; i<N; i++) { 655 BackStackRecord bs = mBackStack.get(i); 656 writer.print(prefix); writer.print(" #"); writer.print(i); 657 writer.print(": "); writer.println(bs.toString()); 658 bs.dump(innerPrefix, fd, writer, args); 659 } 660 } 661 } 662 663 synchronized (this) { 664 if (mBackStackIndices != null) { 665 N = mBackStackIndices.size(); 666 if (N > 0) { 667 writer.print(prefix); writer.println("Back Stack Indices:"); 668 for (int i=0; i<N; i++) { 669 BackStackRecord bs = mBackStackIndices.get(i); 670 writer.print(prefix); writer.print(" #"); writer.print(i); 671 writer.print(": "); writer.println(bs); 672 } 673 } 674 } 675 676 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 677 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 678 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 679 } 680 } 681 682 if (mPendingActions != null) { 683 N = mPendingActions.size(); 684 if (N > 0) { 685 writer.print(prefix); writer.println("Pending Actions:"); 686 for (int i=0; i<N; i++) { 687 Runnable r = mPendingActions.get(i); 688 writer.print(prefix); writer.print(" #"); writer.print(i); 689 writer.print(": "); writer.println(r); 690 } 691 } 692 } 693 694 writer.print(prefix); writer.println("FragmentManager misc state:"); 695 writer.print(prefix); writer.print(" mActivity="); writer.println(mActivity); 696 writer.print(prefix); writer.print(" mContainer="); writer.println(mContainer); 697 if (mParent != null) { 698 writer.print(prefix); writer.print(" mParent="); writer.println(mParent); 699 } 700 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 701 writer.print(" mStateSaved="); writer.print(mStateSaved); 702 writer.print(" mDestroyed="); writer.println(mDestroyed); 703 if (mNeedMenuInvalidate) { 704 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 705 writer.println(mNeedMenuInvalidate); 706 } 707 if (mNoTransactionsBecause != null) { 708 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 709 writer.println(mNoTransactionsBecause); 710 } 711 if (mAvailIndices != null && mAvailIndices.size() > 0) { 712 writer.print(prefix); writer.print(" mAvailIndices: "); 713 writer.println(Arrays.toString(mAvailIndices.toArray())); 714 } 715 } 716 717 Animator loadAnimator(Fragment fragment, int transit, boolean enter, 718 int transitionStyle) { 719 Animator animObj = fragment.onCreateAnimator(transit, enter, 720 fragment.mNextAnim); 721 if (animObj != null) { 722 return animObj; 723 } 724 725 if (fragment.mNextAnim != 0) { 726 Animator anim = AnimatorInflater.loadAnimator(mActivity, fragment.mNextAnim); 727 if (anim != null) { 728 return anim; 729 } 730 } 731 732 if (transit == 0) { 733 return null; 734 } 735 736 int styleIndex = transitToStyleIndex(transit, enter); 737 if (styleIndex < 0) { 738 return null; 739 } 740 741 if (transitionStyle == 0 && mActivity.getWindow() != null) { 742 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 743 } 744 if (transitionStyle == 0) { 745 return null; 746 } 747 748 TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 749 com.android.internal.R.styleable.FragmentAnimation); 750 int anim = attrs.getResourceId(styleIndex, 0); 751 attrs.recycle(); 752 753 if (anim == 0) { 754 return null; 755 } 756 757 return AnimatorInflater.loadAnimator(mActivity, anim); 758 } 759 760 public void performPendingDeferredStart(Fragment f) { 761 if (f.mDeferStart) { 762 if (mExecutingActions) { 763 // Wait until we're done executing our pending transactions 764 mHavePendingDeferredStart = true; 765 return; 766 } 767 f.mDeferStart = false; 768 moveToState(f, mCurState, 0, 0, false); 769 } 770 } 771 772 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 773 boolean keepActive) { 774 //if (DEBUG) Log.v(TAG, "moveToState: " + f 775 // + " oldState=" + f.mState + " newState=" + newState 776 // + " mRemoving=" + f.mRemoving + " Callers=" + Debug.getCallers(5)); 777 778 // Fragments that are not currently added will sit in the onCreate() state. 779 if (!f.mAdded && newState > Fragment.CREATED) { 780 newState = Fragment.CREATED; 781 } 782 if (f.mRemoving && newState > f.mState) { 783 // While removing a fragment, we can't change it to a higher state. 784 newState = f.mState; 785 } 786 // Defer start if requested; don't allow it to move to STARTED or higher 787 // if it's not already started. 788 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 789 newState = Fragment.STOPPED; 790 } 791 if (f.mState < newState) { 792 // For fragments that are created from a layout, when restoring from 793 // state we don't want to allow them to be created until they are 794 // being reloaded from the layout. 795 if (f.mFromLayout && !f.mInLayout) { 796 return; 797 } 798 if (f.mAnimatingAway != null) { 799 // The fragment is currently being animated... but! Now we 800 // want to move our state back up. Give up on waiting for the 801 // animation, move to whatever the final state should be once 802 // the animation is done, and then we can proceed from there. 803 f.mAnimatingAway = null; 804 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 805 } 806 switch (f.mState) { 807 case Fragment.INITIALIZING: 808 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 809 if (f.mSavedFragmentState != null) { 810 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 811 FragmentManagerImpl.VIEW_STATE_TAG); 812 f.mTarget = getFragment(f.mSavedFragmentState, 813 FragmentManagerImpl.TARGET_STATE_TAG); 814 if (f.mTarget != null) { 815 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 816 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 817 } 818 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 819 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 820 if (!f.mUserVisibleHint) { 821 f.mDeferStart = true; 822 if (newState > Fragment.STOPPED) { 823 newState = Fragment.STOPPED; 824 } 825 } 826 } 827 f.mActivity = mActivity; 828 f.mParentFragment = mParent; 829 f.mFragmentManager = mParent != null 830 ? mParent.mChildFragmentManager : mActivity.mFragments; 831 f.mCalled = false; 832 f.onAttach(mActivity); 833 if (!f.mCalled) { 834 throw new SuperNotCalledException("Fragment " + f 835 + " did not call through to super.onAttach()"); 836 } 837 mActivity.onAttachFragment(f); 838 839 if (!f.mRetaining) { 840 f.performCreate(f.mSavedFragmentState); 841 } 842 f.mRetaining = false; 843 if (f.mFromLayout) { 844 // For fragments that are part of the content view 845 // layout, we need to instantiate the view immediately 846 // and the inflater will take care of adding it. 847 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 848 null, f.mSavedFragmentState); 849 if (f.mView != null) { 850 f.mView.setSaveFromParentEnabled(false); 851 if (f.mHidden) f.mView.setVisibility(View.GONE); 852 f.onViewCreated(f.mView, f.mSavedFragmentState); 853 } 854 } 855 case Fragment.CREATED: 856 if (newState > Fragment.CREATED) { 857 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 858 if (!f.mFromLayout) { 859 ViewGroup container = null; 860 if (f.mContainerId != 0) { 861 container = (ViewGroup)mContainer.findViewById(f.mContainerId); 862 if (container == null && !f.mRestored) { 863 throwException(new IllegalArgumentException( 864 "No view found for id 0x" 865 + Integer.toHexString(f.mContainerId) + " (" 866 + f.getResources().getResourceName(f.mContainerId) 867 + ") for fragment " + f)); 868 } 869 } 870 f.mContainer = container; 871 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 872 container, f.mSavedFragmentState); 873 if (f.mView != null) { 874 f.mView.setSaveFromParentEnabled(false); 875 if (container != null) { 876 Animator anim = loadAnimator(f, transit, true, 877 transitionStyle); 878 if (anim != null) { 879 anim.setTarget(f.mView); 880 anim.start(); 881 } 882 container.addView(f.mView); 883 } 884 if (f.mHidden) f.mView.setVisibility(View.GONE); 885 f.onViewCreated(f.mView, f.mSavedFragmentState); 886 } 887 } 888 889 f.performActivityCreated(f.mSavedFragmentState); 890 if (f.mView != null) { 891 f.restoreViewState(f.mSavedFragmentState); 892 } 893 f.mSavedFragmentState = null; 894 } 895 case Fragment.ACTIVITY_CREATED: 896 case Fragment.STOPPED: 897 if (newState > Fragment.STOPPED) { 898 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 899 f.performStart(); 900 } 901 case Fragment.STARTED: 902 if (newState > Fragment.STARTED) { 903 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 904 f.mResumed = true; 905 f.performResume(); 906 // Get rid of this in case we saved it and never needed it. 907 f.mSavedFragmentState = null; 908 f.mSavedViewState = null; 909 } 910 } 911 } else if (f.mState > newState) { 912 switch (f.mState) { 913 case Fragment.RESUMED: 914 if (newState < Fragment.RESUMED) { 915 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 916 f.performPause(); 917 f.mResumed = false; 918 } 919 case Fragment.STARTED: 920 if (newState < Fragment.STARTED) { 921 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 922 f.performStop(); 923 } 924 case Fragment.STOPPED: 925 case Fragment.ACTIVITY_CREATED: 926 if (newState < Fragment.ACTIVITY_CREATED) { 927 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 928 if (f.mView != null) { 929 // Need to save the current view state if not 930 // done already. 931 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 932 saveFragmentViewState(f); 933 } 934 } 935 f.performDestroyView(); 936 if (f.mView != null && f.mContainer != null) { 937 Animator anim = null; 938 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 939 anim = loadAnimator(f, transit, false, 940 transitionStyle); 941 } 942 if (anim != null) { 943 final ViewGroup container = f.mContainer; 944 final View view = f.mView; 945 final Fragment fragment = f; 946 container.startViewTransition(view); 947 f.mAnimatingAway = anim; 948 f.mStateAfterAnimating = newState; 949 anim.addListener(new AnimatorListenerAdapter() { 950 @Override 951 public void onAnimationEnd(Animator anim) { 952 container.endViewTransition(view); 953 if (fragment.mAnimatingAway != null) { 954 fragment.mAnimatingAway = null; 955 moveToState(fragment, fragment.mStateAfterAnimating, 956 0, 0, false); 957 } 958 } 959 }); 960 anim.setTarget(f.mView); 961 anim.start(); 962 963 } 964 f.mContainer.removeView(f.mView); 965 } 966 f.mContainer = null; 967 f.mView = null; 968 } 969 case Fragment.CREATED: 970 if (newState < Fragment.CREATED) { 971 if (mDestroyed) { 972 if (f.mAnimatingAway != null) { 973 // The fragment's containing activity is 974 // being destroyed, but this fragment is 975 // currently animating away. Stop the 976 // animation right now -- it is not needed, 977 // and we can't wait any more on destroying 978 // the fragment. 979 Animator anim = f.mAnimatingAway; 980 f.mAnimatingAway = null; 981 anim.cancel(); 982 } 983 } 984 if (f.mAnimatingAway != null) { 985 // We are waiting for the fragment's view to finish 986 // animating away. Just make a note of the state 987 // the fragment now should move to once the animation 988 // is done. 989 f.mStateAfterAnimating = newState; 990 newState = Fragment.CREATED; 991 } else { 992 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 993 if (!f.mRetaining) { 994 f.performDestroy(); 995 } 996 997 f.mCalled = false; 998 f.onDetach(); 999 if (!f.mCalled) { 1000 throw new SuperNotCalledException("Fragment " + f 1001 + " did not call through to super.onDetach()"); 1002 } 1003 if (!keepActive) { 1004 if (!f.mRetaining) { 1005 makeInactive(f); 1006 } else { 1007 f.mActivity = null; 1008 f.mParentFragment = null; 1009 f.mFragmentManager = null; 1010 } 1011 } 1012 } 1013 } 1014 } 1015 } 1016 1017 f.mState = newState; 1018 } 1019 1020 void moveToState(Fragment f) { 1021 moveToState(f, mCurState, 0, 0, false); 1022 } 1023 1024 void moveToState(int newState, boolean always) { 1025 moveToState(newState, 0, 0, always); 1026 } 1027 1028 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1029 if (mActivity == null && newState != Fragment.INITIALIZING) { 1030 throw new IllegalStateException("No activity"); 1031 } 1032 1033 if (!always && mCurState == newState) { 1034 return; 1035 } 1036 1037 mCurState = newState; 1038 if (mActive != null) { 1039 boolean loadersRunning = false; 1040 for (int i=0; i<mActive.size(); i++) { 1041 Fragment f = mActive.get(i); 1042 if (f != null) { 1043 moveToState(f, newState, transit, transitStyle, false); 1044 if (f.mLoaderManager != null) { 1045 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1046 } 1047 } 1048 } 1049 1050 if (!loadersRunning) { 1051 startPendingDeferredFragments(); 1052 } 1053 1054 if (mNeedMenuInvalidate && mActivity != null && mCurState == Fragment.RESUMED) { 1055 mActivity.invalidateOptionsMenu(); 1056 mNeedMenuInvalidate = false; 1057 } 1058 } 1059 } 1060 1061 void startPendingDeferredFragments() { 1062 if (mActive == null) return; 1063 1064 for (int i=0; i<mActive.size(); i++) { 1065 Fragment f = mActive.get(i); 1066 if (f != null) { 1067 performPendingDeferredStart(f); 1068 } 1069 } 1070 } 1071 1072 void makeActive(Fragment f) { 1073 if (f.mIndex >= 0) { 1074 return; 1075 } 1076 1077 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1078 if (mActive == null) { 1079 mActive = new ArrayList<Fragment>(); 1080 } 1081 f.setIndex(mActive.size(), mParent); 1082 mActive.add(f); 1083 1084 } else { 1085 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1), mParent); 1086 mActive.set(f.mIndex, f); 1087 } 1088 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1089 } 1090 1091 void makeInactive(Fragment f) { 1092 if (f.mIndex < 0) { 1093 return; 1094 } 1095 1096 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1097 mActive.set(f.mIndex, null); 1098 if (mAvailIndices == null) { 1099 mAvailIndices = new ArrayList<Integer>(); 1100 } 1101 mAvailIndices.add(f.mIndex); 1102 mActivity.invalidateFragment(f.mWho); 1103 f.initState(); 1104 } 1105 1106 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1107 if (mAdded == null) { 1108 mAdded = new ArrayList<Fragment>(); 1109 } 1110 if (DEBUG) Log.v(TAG, "add: " + fragment); 1111 makeActive(fragment); 1112 if (!fragment.mDetached) { 1113 mAdded.add(fragment); 1114 fragment.mAdded = true; 1115 fragment.mRemoving = false; 1116 if (fragment.mHasMenu && fragment.mMenuVisible) { 1117 mNeedMenuInvalidate = true; 1118 } 1119 if (moveToStateNow) { 1120 moveToState(fragment); 1121 } 1122 } 1123 } 1124 1125 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1126 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1127 final boolean inactive = !fragment.isInBackStack(); 1128 if (!fragment.mDetached || inactive) { 1129 if (mAdded != null) { 1130 mAdded.remove(fragment); 1131 } 1132 if (fragment.mHasMenu && fragment.mMenuVisible) { 1133 mNeedMenuInvalidate = true; 1134 } 1135 fragment.mAdded = false; 1136 fragment.mRemoving = true; 1137 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1138 transition, transitionStyle, false); 1139 } 1140 } 1141 1142 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1143 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1144 if (!fragment.mHidden) { 1145 fragment.mHidden = true; 1146 if (fragment.mView != null) { 1147 Animator anim = loadAnimator(fragment, transition, true, 1148 transitionStyle); 1149 if (anim != null) { 1150 anim.setTarget(fragment.mView); 1151 // Delay the actual hide operation until the animation finishes, otherwise 1152 // the fragment will just immediately disappear 1153 final Fragment finalFragment = fragment; 1154 anim.addListener(new AnimatorListenerAdapter() { 1155 @Override 1156 public void onAnimationEnd(Animator animation) { 1157 if (finalFragment.mView != null) { 1158 finalFragment.mView.setVisibility(View.GONE); 1159 } 1160 } 1161 }); 1162 anim.start(); 1163 } else { 1164 fragment.mView.setVisibility(View.GONE); 1165 } 1166 } 1167 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1168 mNeedMenuInvalidate = true; 1169 } 1170 fragment.onHiddenChanged(true); 1171 } 1172 } 1173 1174 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1175 if (DEBUG) Log.v(TAG, "show: " + fragment); 1176 if (fragment.mHidden) { 1177 fragment.mHidden = false; 1178 if (fragment.mView != null) { 1179 Animator anim = loadAnimator(fragment, transition, true, 1180 transitionStyle); 1181 if (anim != null) { 1182 anim.setTarget(fragment.mView); 1183 anim.start(); 1184 } 1185 fragment.mView.setVisibility(View.VISIBLE); 1186 } 1187 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1188 mNeedMenuInvalidate = true; 1189 } 1190 fragment.onHiddenChanged(false); 1191 } 1192 } 1193 1194 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1195 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1196 if (!fragment.mDetached) { 1197 fragment.mDetached = true; 1198 if (fragment.mAdded) { 1199 // We are not already in back stack, so need to remove the fragment. 1200 if (mAdded != null) { 1201 mAdded.remove(fragment); 1202 } 1203 if (fragment.mHasMenu && fragment.mMenuVisible) { 1204 mNeedMenuInvalidate = true; 1205 } 1206 fragment.mAdded = false; 1207 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1208 } 1209 } 1210 } 1211 1212 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1213 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1214 if (fragment.mDetached) { 1215 fragment.mDetached = false; 1216 if (!fragment.mAdded) { 1217 if (mAdded == null) { 1218 mAdded = new ArrayList<Fragment>(); 1219 } 1220 mAdded.add(fragment); 1221 fragment.mAdded = true; 1222 if (fragment.mHasMenu && fragment.mMenuVisible) { 1223 mNeedMenuInvalidate = true; 1224 } 1225 moveToState(fragment, mCurState, transition, transitionStyle, false); 1226 } 1227 } 1228 } 1229 1230 public Fragment findFragmentById(int id) { 1231 if (mAdded != null) { 1232 // First look through added fragments. 1233 for (int i=mAdded.size()-1; i>=0; i--) { 1234 Fragment f = mAdded.get(i); 1235 if (f != null && f.mFragmentId == id) { 1236 return f; 1237 } 1238 } 1239 } 1240 if (mActive != null) { 1241 // Now for any known fragment. 1242 for (int i=mActive.size()-1; i>=0; i--) { 1243 Fragment f = mActive.get(i); 1244 if (f != null && f.mFragmentId == id) { 1245 return f; 1246 } 1247 } 1248 } 1249 return null; 1250 } 1251 1252 public Fragment findFragmentByTag(String tag) { 1253 if (mAdded != null && tag != null) { 1254 // First look through added fragments. 1255 for (int i=mAdded.size()-1; i>=0; i--) { 1256 Fragment f = mAdded.get(i); 1257 if (f != null && tag.equals(f.mTag)) { 1258 return f; 1259 } 1260 } 1261 } 1262 if (mActive != null && tag != null) { 1263 // Now for any known fragment. 1264 for (int i=mActive.size()-1; i>=0; i--) { 1265 Fragment f = mActive.get(i); 1266 if (f != null && tag.equals(f.mTag)) { 1267 return f; 1268 } 1269 } 1270 } 1271 return null; 1272 } 1273 1274 public Fragment findFragmentByWho(String who) { 1275 if (mActive != null && who != null) { 1276 for (int i=mActive.size()-1; i>=0; i--) { 1277 Fragment f = mActive.get(i); 1278 if (f != null && (f=f.findFragmentByWho(who)) != null) { 1279 return f; 1280 } 1281 } 1282 } 1283 return null; 1284 } 1285 1286 private void checkStateLoss() { 1287 if (mStateSaved) { 1288 throw new IllegalStateException( 1289 "Can not perform this action after onSaveInstanceState"); 1290 } 1291 if (mNoTransactionsBecause != null) { 1292 throw new IllegalStateException( 1293 "Can not perform this action inside of " + mNoTransactionsBecause); 1294 } 1295 } 1296 1297 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1298 if (!allowStateLoss) { 1299 checkStateLoss(); 1300 } 1301 synchronized (this) { 1302 if (mActivity == null) { 1303 throw new IllegalStateException("Activity has been destroyed"); 1304 } 1305 if (mPendingActions == null) { 1306 mPendingActions = new ArrayList<Runnable>(); 1307 } 1308 mPendingActions.add(action); 1309 if (mPendingActions.size() == 1) { 1310 mActivity.mHandler.removeCallbacks(mExecCommit); 1311 mActivity.mHandler.post(mExecCommit); 1312 } 1313 } 1314 } 1315 1316 public int allocBackStackIndex(BackStackRecord bse) { 1317 synchronized (this) { 1318 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1319 if (mBackStackIndices == null) { 1320 mBackStackIndices = new ArrayList<BackStackRecord>(); 1321 } 1322 int index = mBackStackIndices.size(); 1323 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1324 mBackStackIndices.add(bse); 1325 return index; 1326 1327 } else { 1328 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1329 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1330 mBackStackIndices.set(index, bse); 1331 return index; 1332 } 1333 } 1334 } 1335 1336 public void setBackStackIndex(int index, BackStackRecord bse) { 1337 synchronized (this) { 1338 if (mBackStackIndices == null) { 1339 mBackStackIndices = new ArrayList<BackStackRecord>(); 1340 } 1341 int N = mBackStackIndices.size(); 1342 if (index < N) { 1343 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1344 mBackStackIndices.set(index, bse); 1345 } else { 1346 while (N < index) { 1347 mBackStackIndices.add(null); 1348 if (mAvailBackStackIndices == null) { 1349 mAvailBackStackIndices = new ArrayList<Integer>(); 1350 } 1351 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1352 mAvailBackStackIndices.add(N); 1353 N++; 1354 } 1355 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1356 mBackStackIndices.add(bse); 1357 } 1358 } 1359 } 1360 1361 public void freeBackStackIndex(int index) { 1362 synchronized (this) { 1363 mBackStackIndices.set(index, null); 1364 if (mAvailBackStackIndices == null) { 1365 mAvailBackStackIndices = new ArrayList<Integer>(); 1366 } 1367 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1368 mAvailBackStackIndices.add(index); 1369 } 1370 } 1371 1372 /** 1373 * Only call from main thread! 1374 */ 1375 public boolean execPendingActions() { 1376 if (mExecutingActions) { 1377 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1378 } 1379 1380 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1381 throw new IllegalStateException("Must be called from main thread of process"); 1382 } 1383 1384 boolean didSomething = false; 1385 1386 while (true) { 1387 int numActions; 1388 1389 synchronized (this) { 1390 if (mPendingActions == null || mPendingActions.size() == 0) { 1391 break; 1392 } 1393 1394 numActions = mPendingActions.size(); 1395 if (mTmpActions == null || mTmpActions.length < numActions) { 1396 mTmpActions = new Runnable[numActions]; 1397 } 1398 mPendingActions.toArray(mTmpActions); 1399 mPendingActions.clear(); 1400 mActivity.mHandler.removeCallbacks(mExecCommit); 1401 } 1402 1403 mExecutingActions = true; 1404 for (int i=0; i<numActions; i++) { 1405 mTmpActions[i].run(); 1406 mTmpActions[i] = null; 1407 } 1408 mExecutingActions = false; 1409 didSomething = true; 1410 } 1411 1412 if (mHavePendingDeferredStart) { 1413 boolean loadersRunning = false; 1414 for (int i=0; i<mActive.size(); i++) { 1415 Fragment f = mActive.get(i); 1416 if (f != null && f.mLoaderManager != null) { 1417 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1418 } 1419 } 1420 if (!loadersRunning) { 1421 mHavePendingDeferredStart = false; 1422 startPendingDeferredFragments(); 1423 } 1424 } 1425 return didSomething; 1426 } 1427 1428 void reportBackStackChanged() { 1429 if (mBackStackChangeListeners != null) { 1430 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1431 mBackStackChangeListeners.get(i).onBackStackChanged(); 1432 } 1433 } 1434 } 1435 1436 void addBackStackState(BackStackRecord state) { 1437 if (mBackStack == null) { 1438 mBackStack = new ArrayList<BackStackRecord>(); 1439 } 1440 mBackStack.add(state); 1441 reportBackStackChanged(); 1442 } 1443 1444 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1445 if (mBackStack == null) { 1446 return false; 1447 } 1448 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1449 int last = mBackStack.size()-1; 1450 if (last < 0) { 1451 return false; 1452 } 1453 final BackStackRecord bss = mBackStack.remove(last); 1454 bss.popFromBackStack(true); 1455 reportBackStackChanged(); 1456 } else { 1457 int index = -1; 1458 if (name != null || id >= 0) { 1459 // If a name or ID is specified, look for that place in 1460 // the stack. 1461 index = mBackStack.size()-1; 1462 while (index >= 0) { 1463 BackStackRecord bss = mBackStack.get(index); 1464 if (name != null && name.equals(bss.getName())) { 1465 break; 1466 } 1467 if (id >= 0 && id == bss.mIndex) { 1468 break; 1469 } 1470 index--; 1471 } 1472 if (index < 0) { 1473 return false; 1474 } 1475 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1476 index--; 1477 // Consume all following entries that match. 1478 while (index >= 0) { 1479 BackStackRecord bss = mBackStack.get(index); 1480 if ((name != null && name.equals(bss.getName())) 1481 || (id >= 0 && id == bss.mIndex)) { 1482 index--; 1483 continue; 1484 } 1485 break; 1486 } 1487 } 1488 } 1489 if (index == mBackStack.size()-1) { 1490 return false; 1491 } 1492 final ArrayList<BackStackRecord> states 1493 = new ArrayList<BackStackRecord>(); 1494 for (int i=mBackStack.size()-1; i>index; i--) { 1495 states.add(mBackStack.remove(i)); 1496 } 1497 final int LAST = states.size()-1; 1498 for (int i=0; i<=LAST; i++) { 1499 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1500 states.get(i).popFromBackStack(i == LAST); 1501 } 1502 reportBackStackChanged(); 1503 } 1504 return true; 1505 } 1506 1507 ArrayList<Fragment> retainNonConfig() { 1508 ArrayList<Fragment> fragments = null; 1509 if (mActive != null) { 1510 for (int i=0; i<mActive.size(); i++) { 1511 Fragment f = mActive.get(i); 1512 if (f != null && f.mRetainInstance) { 1513 if (fragments == null) { 1514 fragments = new ArrayList<Fragment>(); 1515 } 1516 fragments.add(f); 1517 f.mRetaining = true; 1518 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1519 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1520 } 1521 } 1522 } 1523 return fragments; 1524 } 1525 1526 void saveFragmentViewState(Fragment f) { 1527 if (f.mView == null) { 1528 return; 1529 } 1530 if (mStateArray == null) { 1531 mStateArray = new SparseArray<Parcelable>(); 1532 } else { 1533 mStateArray.clear(); 1534 } 1535 f.mView.saveHierarchyState(mStateArray); 1536 if (mStateArray.size() > 0) { 1537 f.mSavedViewState = mStateArray; 1538 mStateArray = null; 1539 } 1540 } 1541 1542 Bundle saveFragmentBasicState(Fragment f) { 1543 Bundle result = null; 1544 1545 if (mStateBundle == null) { 1546 mStateBundle = new Bundle(); 1547 } 1548 f.performSaveInstanceState(mStateBundle); 1549 if (!mStateBundle.isEmpty()) { 1550 result = mStateBundle; 1551 mStateBundle = null; 1552 } 1553 1554 if (f.mView != null) { 1555 saveFragmentViewState(f); 1556 } 1557 if (f.mSavedViewState != null) { 1558 if (result == null) { 1559 result = new Bundle(); 1560 } 1561 result.putSparseParcelableArray( 1562 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1563 } 1564 if (!f.mUserVisibleHint) { 1565 if (result == null) { 1566 result = new Bundle(); 1567 } 1568 // Only add this if it's not the default value 1569 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1570 } 1571 1572 return result; 1573 } 1574 1575 Parcelable saveAllState() { 1576 // Make sure all pending operations have now been executed to get 1577 // our state update-to-date. 1578 execPendingActions(); 1579 1580 mStateSaved = true; 1581 1582 if (mActive == null || mActive.size() <= 0) { 1583 return null; 1584 } 1585 1586 // First collect all active fragments. 1587 int N = mActive.size(); 1588 FragmentState[] active = new FragmentState[N]; 1589 boolean haveFragments = false; 1590 for (int i=0; i<N; i++) { 1591 Fragment f = mActive.get(i); 1592 if (f != null) { 1593 if (f.mIndex < 0) { 1594 throwException(new IllegalStateException( 1595 "Failure saving state: active " + f 1596 + " has cleared index: " + f.mIndex)); 1597 } 1598 1599 haveFragments = true; 1600 1601 FragmentState fs = new FragmentState(f); 1602 active[i] = fs; 1603 1604 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1605 fs.mSavedFragmentState = saveFragmentBasicState(f); 1606 1607 if (f.mTarget != null) { 1608 if (f.mTarget.mIndex < 0) { 1609 throwException(new IllegalStateException( 1610 "Failure saving state: " + f 1611 + " has target not in fragment manager: " + f.mTarget)); 1612 } 1613 if (fs.mSavedFragmentState == null) { 1614 fs.mSavedFragmentState = new Bundle(); 1615 } 1616 putFragment(fs.mSavedFragmentState, 1617 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1618 if (f.mTargetRequestCode != 0) { 1619 fs.mSavedFragmentState.putInt( 1620 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1621 f.mTargetRequestCode); 1622 } 1623 } 1624 1625 } else { 1626 fs.mSavedFragmentState = f.mSavedFragmentState; 1627 } 1628 1629 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1630 + fs.mSavedFragmentState); 1631 } 1632 } 1633 1634 if (!haveFragments) { 1635 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1636 return null; 1637 } 1638 1639 int[] added = null; 1640 BackStackState[] backStack = null; 1641 1642 // Build list of currently added fragments. 1643 if (mAdded != null) { 1644 N = mAdded.size(); 1645 if (N > 0) { 1646 added = new int[N]; 1647 for (int i=0; i<N; i++) { 1648 added[i] = mAdded.get(i).mIndex; 1649 if (added[i] < 0) { 1650 throwException(new IllegalStateException( 1651 "Failure saving state: active " + mAdded.get(i) 1652 + " has cleared index: " + added[i])); 1653 } 1654 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1655 + ": " + mAdded.get(i)); 1656 } 1657 } 1658 } 1659 1660 // Now save back stack. 1661 if (mBackStack != null) { 1662 N = mBackStack.size(); 1663 if (N > 0) { 1664 backStack = new BackStackState[N]; 1665 for (int i=0; i<N; i++) { 1666 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1667 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1668 + ": " + mBackStack.get(i)); 1669 } 1670 } 1671 } 1672 1673 FragmentManagerState fms = new FragmentManagerState(); 1674 fms.mActive = active; 1675 fms.mAdded = added; 1676 fms.mBackStack = backStack; 1677 return fms; 1678 } 1679 1680 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1681 // If there is no saved state at all, then there can not be 1682 // any nonConfig fragments either, so that is that. 1683 if (state == null) return; 1684 FragmentManagerState fms = (FragmentManagerState)state; 1685 if (fms.mActive == null) return; 1686 1687 // First re-attach any non-config instances we are retaining back 1688 // to their saved state, so we don't try to instantiate them again. 1689 if (nonConfig != null) { 1690 for (int i=0; i<nonConfig.size(); i++) { 1691 Fragment f = nonConfig.get(i); 1692 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1693 FragmentState fs = fms.mActive[f.mIndex]; 1694 fs.mInstance = f; 1695 f.mSavedViewState = null; 1696 f.mBackStackNesting = 0; 1697 f.mInLayout = false; 1698 f.mAdded = false; 1699 f.mTarget = null; 1700 if (fs.mSavedFragmentState != null) { 1701 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1702 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1703 FragmentManagerImpl.VIEW_STATE_TAG); 1704 } 1705 } 1706 } 1707 1708 // Build the full list of active fragments, instantiating them from 1709 // their saved state. 1710 mActive = new ArrayList<Fragment>(fms.mActive.length); 1711 if (mAvailIndices != null) { 1712 mAvailIndices.clear(); 1713 } 1714 for (int i=0; i<fms.mActive.length; i++) { 1715 FragmentState fs = fms.mActive[i]; 1716 if (fs != null) { 1717 Fragment f = fs.instantiate(mActivity, mParent); 1718 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1719 mActive.add(f); 1720 // Now that the fragment is instantiated (or came from being 1721 // retained above), clear mInstance in case we end up re-restoring 1722 // from this FragmentState again. 1723 fs.mInstance = null; 1724 } else { 1725 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1726 mActive.add(null); 1727 if (mAvailIndices == null) { 1728 mAvailIndices = new ArrayList<Integer>(); 1729 } 1730 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1731 mAvailIndices.add(i); 1732 } 1733 } 1734 1735 // Update the target of all retained fragments. 1736 if (nonConfig != null) { 1737 for (int i=0; i<nonConfig.size(); i++) { 1738 Fragment f = nonConfig.get(i); 1739 if (f.mTargetIndex >= 0) { 1740 if (f.mTargetIndex < mActive.size()) { 1741 f.mTarget = mActive.get(f.mTargetIndex); 1742 } else { 1743 Log.w(TAG, "Re-attaching retained fragment " + f 1744 + " target no longer exists: " + f.mTargetIndex); 1745 f.mTarget = null; 1746 } 1747 } 1748 } 1749 } 1750 1751 // Build the list of currently added fragments. 1752 if (fms.mAdded != null) { 1753 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1754 for (int i=0; i<fms.mAdded.length; i++) { 1755 Fragment f = mActive.get(fms.mAdded[i]); 1756 if (f == null) { 1757 throwException(new IllegalStateException( 1758 "No instantiated fragment for index #" + fms.mAdded[i])); 1759 } 1760 f.mAdded = true; 1761 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1762 mAdded.add(f); 1763 } 1764 } else { 1765 mAdded = null; 1766 } 1767 1768 // Build the back stack. 1769 if (fms.mBackStack != null) { 1770 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1771 for (int i=0; i<fms.mBackStack.length; i++) { 1772 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1773 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1774 + " (index " + bse.mIndex + "): " + bse); 1775 mBackStack.add(bse); 1776 if (bse.mIndex >= 0) { 1777 setBackStackIndex(bse.mIndex, bse); 1778 } 1779 } 1780 } else { 1781 mBackStack = null; 1782 } 1783 } 1784 1785 public void attachActivity(Activity activity, FragmentContainer container, Fragment parent) { 1786 if (mActivity != null) throw new IllegalStateException("Already attached"); 1787 mActivity = activity; 1788 mContainer = container; 1789 mParent = parent; 1790 } 1791 1792 public void noteStateNotSaved() { 1793 mStateSaved = false; 1794 } 1795 1796 public void dispatchCreate() { 1797 mStateSaved = false; 1798 moveToState(Fragment.CREATED, false); 1799 } 1800 1801 public void dispatchActivityCreated() { 1802 mStateSaved = false; 1803 moveToState(Fragment.ACTIVITY_CREATED, false); 1804 } 1805 1806 public void dispatchStart() { 1807 mStateSaved = false; 1808 moveToState(Fragment.STARTED, false); 1809 } 1810 1811 public void dispatchResume() { 1812 mStateSaved = false; 1813 moveToState(Fragment.RESUMED, false); 1814 } 1815 1816 public void dispatchPause() { 1817 moveToState(Fragment.STARTED, false); 1818 } 1819 1820 public void dispatchStop() { 1821 moveToState(Fragment.STOPPED, false); 1822 } 1823 1824 public void dispatchDestroyView() { 1825 moveToState(Fragment.CREATED, false); 1826 } 1827 1828 public void dispatchDestroy() { 1829 mDestroyed = true; 1830 execPendingActions(); 1831 moveToState(Fragment.INITIALIZING, false); 1832 mActivity = null; 1833 mContainer = null; 1834 mParent = null; 1835 } 1836 1837 public void dispatchConfigurationChanged(Configuration newConfig) { 1838 if (mAdded != null) { 1839 for (int i=0; i<mAdded.size(); i++) { 1840 Fragment f = mAdded.get(i); 1841 if (f != null) { 1842 f.performConfigurationChanged(newConfig); 1843 } 1844 } 1845 } 1846 } 1847 1848 public void dispatchLowMemory() { 1849 if (mAdded != null) { 1850 for (int i=0; i<mAdded.size(); i++) { 1851 Fragment f = mAdded.get(i); 1852 if (f != null) { 1853 f.performLowMemory(); 1854 } 1855 } 1856 } 1857 } 1858 1859 public void dispatchTrimMemory(int level) { 1860 if (mAdded != null) { 1861 for (int i=0; i<mAdded.size(); i++) { 1862 Fragment f = mAdded.get(i); 1863 if (f != null) { 1864 f.performTrimMemory(level); 1865 } 1866 } 1867 } 1868 } 1869 1870 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1871 boolean show = false; 1872 ArrayList<Fragment> newMenus = null; 1873 if (mAdded != null) { 1874 for (int i=0; i<mAdded.size(); i++) { 1875 Fragment f = mAdded.get(i); 1876 if (f != null) { 1877 if (f.performCreateOptionsMenu(menu, inflater)) { 1878 show = true; 1879 if (newMenus == null) { 1880 newMenus = new ArrayList<Fragment>(); 1881 } 1882 newMenus.add(f); 1883 } 1884 } 1885 } 1886 } 1887 1888 if (mCreatedMenus != null) { 1889 for (int i=0; i<mCreatedMenus.size(); i++) { 1890 Fragment f = mCreatedMenus.get(i); 1891 if (newMenus == null || !newMenus.contains(f)) { 1892 f.onDestroyOptionsMenu(); 1893 } 1894 } 1895 } 1896 1897 mCreatedMenus = newMenus; 1898 1899 return show; 1900 } 1901 1902 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1903 boolean show = false; 1904 if (mAdded != null) { 1905 for (int i=0; i<mAdded.size(); i++) { 1906 Fragment f = mAdded.get(i); 1907 if (f != null) { 1908 if (f.performPrepareOptionsMenu(menu)) { 1909 show = true; 1910 } 1911 } 1912 } 1913 } 1914 return show; 1915 } 1916 1917 public boolean dispatchOptionsItemSelected(MenuItem item) { 1918 if (mAdded != null) { 1919 for (int i=0; i<mAdded.size(); i++) { 1920 Fragment f = mAdded.get(i); 1921 if (f != null) { 1922 if (f.performOptionsItemSelected(item)) { 1923 return true; 1924 } 1925 } 1926 } 1927 } 1928 return false; 1929 } 1930 1931 public boolean dispatchContextItemSelected(MenuItem item) { 1932 if (mAdded != null) { 1933 for (int i=0; i<mAdded.size(); i++) { 1934 Fragment f = mAdded.get(i); 1935 if (f != null) { 1936 if (f.performContextItemSelected(item)) { 1937 return true; 1938 } 1939 } 1940 } 1941 } 1942 return false; 1943 } 1944 1945 public void dispatchOptionsMenuClosed(Menu menu) { 1946 if (mAdded != null) { 1947 for (int i=0; i<mAdded.size(); i++) { 1948 Fragment f = mAdded.get(i); 1949 if (f != null) { 1950 f.performOptionsMenuClosed(menu); 1951 } 1952 } 1953 } 1954 } 1955 1956 @Override 1957 public void invalidateOptionsMenu() { 1958 if (mActivity != null && mCurState == Fragment.RESUMED) { 1959 mActivity.invalidateOptionsMenu(); 1960 } else { 1961 mNeedMenuInvalidate = true; 1962 } 1963 } 1964 1965 public static int reverseTransit(int transit) { 1966 int rev = 0; 1967 switch (transit) { 1968 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1969 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1970 break; 1971 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1972 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1973 break; 1974 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1975 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 1976 break; 1977 } 1978 return rev; 1979 1980 } 1981 1982 public static int transitToStyleIndex(int transit, boolean enter) { 1983 int animAttr = -1; 1984 switch (transit) { 1985 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1986 animAttr = enter 1987 ? com.android.internal.R.styleable.FragmentAnimation_fragmentOpenEnterAnimation 1988 : com.android.internal.R.styleable.FragmentAnimation_fragmentOpenExitAnimation; 1989 break; 1990 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1991 animAttr = enter 1992 ? com.android.internal.R.styleable.FragmentAnimation_fragmentCloseEnterAnimation 1993 : com.android.internal.R.styleable.FragmentAnimation_fragmentCloseExitAnimation; 1994 break; 1995 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1996 animAttr = enter 1997 ? com.android.internal.R.styleable.FragmentAnimation_fragmentFadeEnterAnimation 1998 : com.android.internal.R.styleable.FragmentAnimation_fragmentFadeExitAnimation; 1999 break; 2000 } 2001 return animAttr; 2002 } 2003} 2004