FragmentManager.java revision ae5bd3a998fb0b811f2575899514e73243041a5d
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.Slog; 33import android.util.SparseArray; 34import android.view.Menu; 35import android.view.MenuInflater; 36import android.view.MenuItem; 37import android.view.View; 38import android.view.ViewGroup; 39 40import java.io.FileDescriptor; 41import java.io.PrintWriter; 42import java.util.ArrayList; 43import java.util.Arrays; 44 45/** 46 * Interface for interacting with {@link Fragment} objects inside of an 47 * {@link Activity} 48 * 49 * <div class="special reference"> 50 * <h3>Developer Guides</h3> 51 * <p>For more information about using fragments, read the 52 * <a href="{@docRoot}guide/topics/fundamentals/fragments.html">Fragments</a> developer guide.</p> 53 * </div> 54 * 55 * While the FragmentManager API was introduced in 56 * {@link android.os.Build.VERSION_CODES#HONEYCOMB}, a version of the API 57 * at is also available for use on older platforms through 58 * {@link android.support.v4.app.FragmentActivity}. See the blog post 59 * <a href="http://android-developers.blogspot.com/2011/03/fragments-for-all.html"> 60 * Fragments For All</a> for more details. 61 */ 62public abstract class FragmentManager { 63 /** 64 * Representation of an entry on the fragment back stack, as created 65 * with {@link FragmentTransaction#addToBackStack(String) 66 * FragmentTransaction.addToBackStack()}. Entries can later be 67 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 68 * FragmentManager.getBackStackEntry()}. 69 * 70 * <p>Note that you should never hold on to a BackStackEntry object; 71 * the identifier as returned by {@link #getId} is the only thing that 72 * will be persisted across activity instances. 73 */ 74 public interface BackStackEntry { 75 /** 76 * Return the unique identifier for the entry. This is the only 77 * representation of the entry that will persist across activity 78 * instances. 79 */ 80 public int getId(); 81 82 /** 83 * Get the name that was supplied to 84 * {@link FragmentTransaction#addToBackStack(String) 85 * FragmentTransaction.addToBackStack(String)} when creating this entry. 86 */ 87 public String getName(); 88 89 /** 90 * Return the full bread crumb title resource identifier for the entry, 91 * or 0 if it does not have one. 92 */ 93 public int getBreadCrumbTitleRes(); 94 95 /** 96 * Return the short bread crumb title resource identifier for the entry, 97 * or 0 if it does not have one. 98 */ 99 public int getBreadCrumbShortTitleRes(); 100 101 /** 102 * Return the full bread crumb title for the entry, or null if it 103 * does not have one. 104 */ 105 public CharSequence getBreadCrumbTitle(); 106 107 /** 108 * Return the short bread crumb title for the entry, or null if it 109 * does not have one. 110 */ 111 public CharSequence getBreadCrumbShortTitle(); 112 } 113 114 /** 115 * Interface to watch for changes to the back stack. 116 */ 117 public interface OnBackStackChangedListener { 118 /** 119 * Called whenever the contents of the back stack change. 120 */ 121 public void onBackStackChanged(); 122 } 123 124 /** 125 * Start a series of edit operations on the Fragments associated with 126 * this FragmentManager. 127 * 128 * <p>Note: A fragment transaction can only be created/committed prior 129 * to an activity saving its state. If you try to commit a transaction 130 * after {@link Activity#onSaveInstanceState Activity.onSaveInstanceState()} 131 * (and prior to a following {@link Activity#onStart Activity.onStart} 132 * or {@link Activity#onResume Activity.onResume()}, you will get an error. 133 * This is because the framework takes care of saving your current fragments 134 * in the state, and if changes are made after the state is saved then they 135 * will be lost.</p> 136 */ 137 public abstract FragmentTransaction beginTransaction(); 138 139 /** @hide -- remove once prebuilts are in. */ 140 @Deprecated 141 public FragmentTransaction openTransaction() { 142 return beginTransaction(); 143 } 144 145 /** 146 * After a {@link FragmentTransaction} is committed with 147 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 148 * is scheduled to be executed asynchronously on the process's main thread. 149 * If you want to immediately executing any such pending operations, you 150 * can call this function (only from the main thread) to do so. Note that 151 * all callbacks and other related behavior will be done from within this 152 * call, so be careful about where this is called from. 153 * 154 * @return Returns true if there were any pending transactions to be 155 * executed. 156 */ 157 public abstract boolean executePendingTransactions(); 158 159 /** 160 * Finds a fragment that was identified by the given id either when inflated 161 * from XML or as the container ID when added in a transaction. This first 162 * searches through fragments that are currently added to the manager's 163 * activity; if no such fragment is found, then all fragments currently 164 * on the back stack associated with this ID are searched. 165 * @return The fragment if found or null otherwise. 166 */ 167 public abstract Fragment findFragmentById(int id); 168 169 /** 170 * Finds a fragment that was identified by the given tag either when inflated 171 * from XML or as supplied when added in a transaction. This first 172 * searches through fragments that are currently added to the manager's 173 * activity; if no such fragment is found, then all fragments currently 174 * on the back stack are searched. 175 * @return The fragment if found or null otherwise. 176 */ 177 public abstract Fragment findFragmentByTag(String tag); 178 179 /** 180 * Flag for {@link #popBackStack(String, int)} 181 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 182 * a back stack entry has been supplied, then all matching entries will 183 * be consumed until one that doesn't match is found or the bottom of 184 * the stack is reached. Otherwise, all entries up to but not including that entry 185 * will be removed. 186 */ 187 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 188 189 /** 190 * Pop the top state off the back stack. This function is asynchronous -- it 191 * enqueues the request to pop, but the action will not be performed until the 192 * application returns to its event loop. 193 */ 194 public abstract void popBackStack(); 195 196 /** 197 * Like {@link #popBackStack()}, but performs the operation immediately 198 * inside of the call. This is like calling {@link #executePendingTransactions()} 199 * afterwards. 200 * @return Returns true if there was something popped, else false. 201 */ 202 public abstract boolean popBackStackImmediate(); 203 204 /** 205 * Pop the last fragment transition from the manager's fragment 206 * back stack. If there is nothing to pop, false is returned. 207 * This function is asynchronous -- it enqueues the 208 * request to pop, but the action will not be performed until the application 209 * returns to its event loop. 210 * 211 * @param name If non-null, this is the name of a previous back state 212 * to look for; if found, all states up to that state will be popped. The 213 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 214 * the named state itself is popped. If null, only the top state is popped. 215 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 216 */ 217 public abstract void popBackStack(String name, int flags); 218 219 /** 220 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 221 * inside of the call. This is like calling {@link #executePendingTransactions()} 222 * afterwards. 223 * @return Returns true if there was something popped, else false. 224 */ 225 public abstract boolean popBackStackImmediate(String name, int flags); 226 227 /** 228 * Pop all back stack states up to the one with the given identifier. 229 * This function is asynchronous -- it enqueues the 230 * request to pop, but the action will not be performed until the application 231 * returns to its event loop. 232 * 233 * @param id Identifier of the stated to be popped. If no identifier exists, 234 * false is returned. 235 * The identifier is the number returned by 236 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 237 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 238 * the named state itself is popped. 239 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 240 */ 241 public abstract void popBackStack(int id, int flags); 242 243 /** 244 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 245 * inside of the call. This is like calling {@link #executePendingTransactions()} 246 * afterwards. 247 * @return Returns true if there was something popped, else false. 248 */ 249 public abstract boolean popBackStackImmediate(int id, int flags); 250 251 /** 252 * Return the number of entries currently in the back stack. 253 */ 254 public abstract int getBackStackEntryCount(); 255 256 /** 257 * Return the BackStackEntry at index <var>index</var> in the back stack; 258 * entries start index 0 being the bottom of the stack. 259 */ 260 public abstract BackStackEntry getBackStackEntryAt(int index); 261 262 /** 263 * Add a new listener for changes to the fragment back stack. 264 */ 265 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 266 267 /** 268 * Remove a listener that was previously added with 269 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 270 */ 271 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 272 273 /** 274 * Put a reference to a fragment in a Bundle. This Bundle can be 275 * persisted as saved state, and when later restoring 276 * {@link #getFragment(Bundle, String)} will return the current 277 * instance of the same fragment. 278 * 279 * @param bundle The bundle in which to put the fragment reference. 280 * @param key The name of the entry in the bundle. 281 * @param fragment The Fragment whose reference is to be stored. 282 */ 283 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 284 285 /** 286 * Retrieve the current Fragment instance for a reference previously 287 * placed with {@link #putFragment(Bundle, String, Fragment)}. 288 * 289 * @param bundle The bundle from which to retrieve the fragment reference. 290 * @param key The name of the entry in the bundle. 291 * @return Returns the current Fragment instance that is associated with 292 * the given reference. 293 */ 294 public abstract Fragment getFragment(Bundle bundle, String key); 295 296 /** 297 * Save the current instance state of the given Fragment. This can be 298 * used later when creating a new instance of the Fragment and adding 299 * it to the fragment manager, to have it create itself to match the 300 * current state returned here. Note that there are limits on how 301 * this can be used: 302 * 303 * <ul> 304 * <li>The Fragment must currently be attached to the FragmentManager. 305 * <li>A new Fragment created using this saved state must be the same class 306 * type as the Fragment it was created from. 307 * <li>The saved state can not contain dependencies on other fragments -- 308 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 309 * store a fragment reference because that reference may not be valid when 310 * this saved state is later used. Likewise the Fragment's target and 311 * result code are not included in this state. 312 * </ul> 313 * 314 * @param f The Fragment whose state is to be saved. 315 * @return The generated state. This will be null if there was no 316 * interesting state created by the fragment. 317 */ 318 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 319 320 /** 321 * Print the FragmentManager's state into the given stream. 322 * 323 * @param prefix Text to print at the front of each line. 324 * @param fd The raw file descriptor that the dump is being sent to. 325 * @param writer A PrintWriter to which the dump is to be set. 326 * @param args Additional arguments to the dump request. 327 */ 328 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 329 330 /** 331 * Control whether the framework's internal fragment manager debugging 332 * logs are turned on. If enabled, you will see output in logcat as 333 * the framework performs fragment operations. 334 */ 335 public static void enableDebugLogging(boolean enabled) { 336 FragmentManagerImpl.DEBUG = enabled; 337 } 338 339 /** 340 * Invalidate the attached activity's options menu as necessary. 341 * This may end up being deferred until we move to the resumed state. 342 */ 343 public void invalidateOptionsMenu() { } 344} 345 346final class FragmentManagerState implements Parcelable { 347 FragmentState[] mActive; 348 int[] mAdded; 349 BackStackState[] mBackStack; 350 351 public FragmentManagerState() { 352 } 353 354 public FragmentManagerState(Parcel in) { 355 mActive = in.createTypedArray(FragmentState.CREATOR); 356 mAdded = in.createIntArray(); 357 mBackStack = in.createTypedArray(BackStackState.CREATOR); 358 } 359 360 public int describeContents() { 361 return 0; 362 } 363 364 public void writeToParcel(Parcel dest, int flags) { 365 dest.writeTypedArray(mActive, flags); 366 dest.writeIntArray(mAdded); 367 dest.writeTypedArray(mBackStack, flags); 368 } 369 370 public static final Parcelable.Creator<FragmentManagerState> CREATOR 371 = new Parcelable.Creator<FragmentManagerState>() { 372 public FragmentManagerState createFromParcel(Parcel in) { 373 return new FragmentManagerState(in); 374 } 375 376 public FragmentManagerState[] newArray(int size) { 377 return new FragmentManagerState[size]; 378 } 379 }; 380} 381 382/** 383 * Container for fragments associated with an activity. 384 */ 385final class FragmentManagerImpl extends FragmentManager { 386 static boolean DEBUG = false; 387 static final String TAG = "FragmentManager"; 388 389 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 390 static final String TARGET_STATE_TAG = "android:target_state"; 391 static final String VIEW_STATE_TAG = "android:view_state"; 392 static final String USER_VISIBLE_HINT_TAG = "android:user_visible_hint"; 393 394 ArrayList<Runnable> mPendingActions; 395 Runnable[] mTmpActions; 396 boolean mExecutingActions; 397 398 ArrayList<Fragment> mActive; 399 ArrayList<Fragment> mAdded; 400 ArrayList<Integer> mAvailIndices; 401 ArrayList<BackStackRecord> mBackStack; 402 ArrayList<Fragment> mCreatedMenus; 403 404 // Must be accessed while locked. 405 ArrayList<BackStackRecord> mBackStackIndices; 406 ArrayList<Integer> mAvailBackStackIndices; 407 408 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 409 410 int mCurState = Fragment.INITIALIZING; 411 Activity mActivity; 412 413 boolean mNeedMenuInvalidate; 414 boolean mStateSaved; 415 boolean mDestroyed; 416 String mNoTransactionsBecause; 417 boolean mHavePendingDeferredStart; 418 419 // Temporary vars for state save and restore. 420 Bundle mStateBundle = null; 421 SparseArray<Parcelable> mStateArray = null; 422 423 Runnable mExecCommit = new Runnable() { 424 @Override 425 public void run() { 426 execPendingActions(); 427 } 428 }; 429 430 @Override 431 public FragmentTransaction beginTransaction() { 432 return new BackStackRecord(this); 433 } 434 435 @Override 436 public boolean executePendingTransactions() { 437 return execPendingActions(); 438 } 439 440 @Override 441 public void popBackStack() { 442 enqueueAction(new Runnable() { 443 @Override public void run() { 444 popBackStackState(mActivity.mHandler, null, -1, 0); 445 } 446 }, false); 447 } 448 449 @Override 450 public boolean popBackStackImmediate() { 451 checkStateLoss(); 452 executePendingTransactions(); 453 return popBackStackState(mActivity.mHandler, null, -1, 0); 454 } 455 456 @Override 457 public void popBackStack(final String name, final int flags) { 458 enqueueAction(new Runnable() { 459 @Override public void run() { 460 popBackStackState(mActivity.mHandler, name, -1, flags); 461 } 462 }, false); 463 } 464 465 @Override 466 public boolean popBackStackImmediate(String name, int flags) { 467 checkStateLoss(); 468 executePendingTransactions(); 469 return popBackStackState(mActivity.mHandler, name, -1, flags); 470 } 471 472 @Override 473 public void popBackStack(final int id, final int flags) { 474 if (id < 0) { 475 throw new IllegalArgumentException("Bad id: " + id); 476 } 477 enqueueAction(new Runnable() { 478 @Override public void run() { 479 popBackStackState(mActivity.mHandler, null, id, flags); 480 } 481 }, false); 482 } 483 484 @Override 485 public boolean popBackStackImmediate(int id, int flags) { 486 checkStateLoss(); 487 executePendingTransactions(); 488 if (id < 0) { 489 throw new IllegalArgumentException("Bad id: " + id); 490 } 491 return popBackStackState(mActivity.mHandler, null, id, flags); 492 } 493 494 @Override 495 public int getBackStackEntryCount() { 496 return mBackStack != null ? mBackStack.size() : 0; 497 } 498 499 @Override 500 public BackStackEntry getBackStackEntryAt(int index) { 501 return mBackStack.get(index); 502 } 503 504 @Override 505 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 506 if (mBackStackChangeListeners == null) { 507 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 508 } 509 mBackStackChangeListeners.add(listener); 510 } 511 512 @Override 513 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 514 if (mBackStackChangeListeners != null) { 515 mBackStackChangeListeners.remove(listener); 516 } 517 } 518 519 @Override 520 public void putFragment(Bundle bundle, String key, Fragment fragment) { 521 if (fragment.mIndex < 0) { 522 throw new IllegalStateException("Fragment " + fragment 523 + " is not currently in the FragmentManager"); 524 } 525 bundle.putInt(key, fragment.mIndex); 526 } 527 528 @Override 529 public Fragment getFragment(Bundle bundle, String key) { 530 int index = bundle.getInt(key, -1); 531 if (index == -1) { 532 return null; 533 } 534 if (index >= mActive.size()) { 535 throw new IllegalStateException("Fragement no longer exists for key " 536 + key + ": index " + index); 537 } 538 Fragment f = mActive.get(index); 539 if (f == null) { 540 throw new IllegalStateException("Fragement no longer exists for key " 541 + key + ": index " + index); 542 } 543 return f; 544 } 545 546 @Override 547 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 548 if (fragment.mIndex < 0) { 549 throw new IllegalStateException("Fragment " + fragment 550 + " is not currently in the FragmentManager"); 551 } 552 if (fragment.mState > Fragment.INITIALIZING) { 553 Bundle result = saveFragmentBasicState(fragment); 554 return result != null ? new Fragment.SavedState(result) : null; 555 } 556 return null; 557 } 558 559 @Override 560 public String toString() { 561 StringBuilder sb = new StringBuilder(128); 562 sb.append("FragmentManager{"); 563 sb.append(Integer.toHexString(System.identityHashCode(this))); 564 sb.append(" in "); 565 DebugUtils.buildShortClassTag(mActivity, sb); 566 sb.append("}}"); 567 return sb.toString(); 568 } 569 570 @Override 571 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 572 String innerPrefix = prefix + " "; 573 574 int N; 575 if (mActive != null) { 576 N = mActive.size(); 577 if (N > 0) { 578 writer.print(prefix); writer.print("Active Fragments in "); 579 writer.print(Integer.toHexString(System.identityHashCode(this))); 580 writer.println(":"); 581 for (int i=0; i<N; i++) { 582 Fragment f = mActive.get(i); 583 writer.print(prefix); writer.print(" #"); writer.print(i); 584 writer.print(": "); writer.println(f); 585 if (f != null) { 586 f.dump(innerPrefix, fd, writer, args); 587 } 588 } 589 } 590 } 591 592 if (mAdded != null) { 593 N = mAdded.size(); 594 if (N > 0) { 595 writer.print(prefix); writer.println("Added Fragments:"); 596 for (int i=0; i<N; i++) { 597 Fragment f = mAdded.get(i); 598 writer.print(prefix); writer.print(" #"); writer.print(i); 599 writer.print(": "); writer.println(f.toString()); 600 } 601 } 602 } 603 604 if (mCreatedMenus != null) { 605 N = mCreatedMenus.size(); 606 if (N > 0) { 607 writer.print(prefix); writer.println("Fragments Created Menus:"); 608 for (int i=0; i<N; i++) { 609 Fragment f = mCreatedMenus.get(i); 610 writer.print(prefix); writer.print(" #"); writer.print(i); 611 writer.print(": "); writer.println(f.toString()); 612 } 613 } 614 } 615 616 if (mBackStack != null) { 617 N = mBackStack.size(); 618 if (N > 0) { 619 writer.print(prefix); writer.println("Back Stack:"); 620 for (int i=0; i<N; i++) { 621 BackStackRecord bs = mBackStack.get(i); 622 writer.print(prefix); writer.print(" #"); writer.print(i); 623 writer.print(": "); writer.println(bs.toString()); 624 bs.dump(innerPrefix, fd, writer, args); 625 } 626 } 627 } 628 629 synchronized (this) { 630 if (mBackStackIndices != null) { 631 N = mBackStackIndices.size(); 632 if (N > 0) { 633 writer.print(prefix); writer.println("Back Stack Indices:"); 634 for (int i=0; i<N; i++) { 635 BackStackRecord bs = mBackStackIndices.get(i); 636 writer.print(prefix); writer.print(" #"); writer.print(i); 637 writer.print(": "); writer.println(bs); 638 } 639 } 640 } 641 642 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 643 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 644 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 645 } 646 } 647 648 if (mPendingActions != null) { 649 N = mPendingActions.size(); 650 if (N > 0) { 651 writer.print(prefix); writer.println("Pending Actions:"); 652 for (int i=0; i<N; i++) { 653 Runnable r = mPendingActions.get(i); 654 writer.print(prefix); writer.print(" #"); writer.print(i); 655 writer.print(": "); writer.println(r); 656 } 657 } 658 } 659 660 writer.print(prefix); writer.println("FragmentManager misc state:"); 661 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 662 writer.print(" mStateSaved="); writer.print(mStateSaved); 663 writer.print(" mDestroyed="); writer.println(mDestroyed); 664 if (mNeedMenuInvalidate) { 665 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 666 writer.println(mNeedMenuInvalidate); 667 } 668 if (mNoTransactionsBecause != null) { 669 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 670 writer.println(mNoTransactionsBecause); 671 } 672 if (mAvailIndices != null && mAvailIndices.size() > 0) { 673 writer.print(prefix); writer.print(" mAvailIndices: "); 674 writer.println(Arrays.toString(mAvailIndices.toArray())); 675 } 676 } 677 678 Animator loadAnimator(Fragment fragment, int transit, boolean enter, 679 int transitionStyle) { 680 Animator animObj = fragment.onCreateAnimator(transit, enter, 681 fragment.mNextAnim); 682 if (animObj != null) { 683 return animObj; 684 } 685 686 if (fragment.mNextAnim != 0) { 687 Animator anim = AnimatorInflater.loadAnimator(mActivity, fragment.mNextAnim); 688 if (anim != null) { 689 return anim; 690 } 691 } 692 693 if (transit == 0) { 694 return null; 695 } 696 697 int styleIndex = transitToStyleIndex(transit, enter); 698 if (styleIndex < 0) { 699 return null; 700 } 701 702 if (transitionStyle == 0 && mActivity.getWindow() != null) { 703 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 704 } 705 if (transitionStyle == 0) { 706 return null; 707 } 708 709 TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 710 com.android.internal.R.styleable.FragmentAnimation); 711 int anim = attrs.getResourceId(styleIndex, 0); 712 attrs.recycle(); 713 714 if (anim == 0) { 715 return null; 716 } 717 718 return AnimatorInflater.loadAnimator(mActivity, anim); 719 } 720 721 public void performPendingDeferredStart(Fragment f) { 722 if (f.mDeferStart) { 723 if (mExecutingActions) { 724 // Wait until we're done executing our pending transactions 725 mHavePendingDeferredStart = true; 726 return; 727 } 728 f.mDeferStart = false; 729 moveToState(f, mCurState, 0, 0, false); 730 } 731 } 732 733 void moveToState(Fragment f, int newState, int transit, int transitionStyle, 734 boolean keepActive) { 735 // Fragments that are not currently added will sit in the onCreate() state. 736 if (!f.mAdded && newState > Fragment.CREATED) { 737 newState = Fragment.CREATED; 738 } 739 if (f.mRemoving && newState > f.mState) { 740 // While removing a fragment, we can't change it to a higher state. 741 newState = f.mState; 742 } 743 // Defer start if requested; don't allow it to move to STARTED or higher 744 // if it's not already started. 745 if (f.mDeferStart && f.mState < Fragment.STARTED && newState > Fragment.STOPPED) { 746 newState = Fragment.STOPPED; 747 } 748 if (f.mState < newState) { 749 // For fragments that are created from a layout, when restoring from 750 // state we don't want to allow them to be created until they are 751 // being reloaded from the layout. 752 if (f.mFromLayout && !f.mInLayout) { 753 return; 754 } 755 if (f.mAnimatingAway != null) { 756 // The fragment is currently being animated... but! Now we 757 // want to move our state back up. Give up on waiting for the 758 // animation, move to whatever the final state should be once 759 // the animation is done, and then we can proceed from there. 760 f.mAnimatingAway = null; 761 moveToState(f, f.mStateAfterAnimating, 0, 0, true); 762 } 763 switch (f.mState) { 764 case Fragment.INITIALIZING: 765 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 766 if (f.mSavedFragmentState != null) { 767 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 768 FragmentManagerImpl.VIEW_STATE_TAG); 769 f.mTarget = getFragment(f.mSavedFragmentState, 770 FragmentManagerImpl.TARGET_STATE_TAG); 771 if (f.mTarget != null) { 772 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 773 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 774 } 775 f.mUserVisibleHint = f.mSavedFragmentState.getBoolean( 776 FragmentManagerImpl.USER_VISIBLE_HINT_TAG, true); 777 if (!f.mUserVisibleHint) { 778 f.mDeferStart = true; 779 if (newState > Fragment.STOPPED) { 780 newState = Fragment.STOPPED; 781 } 782 } 783 } 784 f.mActivity = mActivity; 785 f.mFragmentManager = mActivity.mFragments; 786 f.mCalled = false; 787 f.onAttach(mActivity); 788 if (!f.mCalled) { 789 throw new SuperNotCalledException("Fragment " + f 790 + " did not call through to super.onAttach()"); 791 } 792 mActivity.onAttachFragment(f); 793 794 if (!f.mRetaining) { 795 f.mCalled = false; 796 f.onCreate(f.mSavedFragmentState); 797 if (!f.mCalled) { 798 throw new SuperNotCalledException("Fragment " + f 799 + " did not call through to super.onCreate()"); 800 } 801 } 802 f.mRetaining = false; 803 if (f.mFromLayout) { 804 // For fragments that are part of the content view 805 // layout, we need to instantiate the view immediately 806 // and the inflater will take care of adding it. 807 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 808 null, f.mSavedFragmentState); 809 if (f.mView != null) { 810 f.mView.setSaveFromParentEnabled(false); 811 if (f.mHidden) f.mView.setVisibility(View.GONE); 812 f.onViewCreated(f.mView, f.mSavedFragmentState); 813 } 814 } 815 case Fragment.CREATED: 816 if (newState > Fragment.CREATED) { 817 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 818 if (!f.mFromLayout) { 819 ViewGroup container = null; 820 if (f.mContainerId != 0) { 821 container = (ViewGroup)mActivity.findViewById(f.mContainerId); 822 if (container == null && !f.mRestored) { 823 throw new IllegalArgumentException("No view found for id 0x" 824 + Integer.toHexString(f.mContainerId) 825 + " for fragment " + f); 826 } 827 } 828 f.mContainer = container; 829 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 830 container, f.mSavedFragmentState); 831 if (f.mView != null) { 832 f.mView.setSaveFromParentEnabled(false); 833 if (container != null) { 834 Animator anim = loadAnimator(f, transit, true, 835 transitionStyle); 836 if (anim != null) { 837 anim.setTarget(f.mView); 838 anim.start(); 839 } 840 container.addView(f.mView); 841 } 842 if (f.mHidden) f.mView.setVisibility(View.GONE); 843 f.onViewCreated(f.mView, f.mSavedFragmentState); 844 } 845 } 846 847 f.mCalled = false; 848 f.onActivityCreated(f.mSavedFragmentState); 849 if (!f.mCalled) { 850 throw new SuperNotCalledException("Fragment " + f 851 + " did not call through to super.onActivityCreated()"); 852 } 853 if (f.mView != null) { 854 f.restoreViewState(); 855 } 856 f.mSavedFragmentState = null; 857 } 858 case Fragment.ACTIVITY_CREATED: 859 case Fragment.STOPPED: 860 if (newState > Fragment.STOPPED) { 861 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 862 f.mCalled = false; 863 f.performStart(); 864 if (!f.mCalled) { 865 throw new SuperNotCalledException("Fragment " + f 866 + " did not call through to super.onStart()"); 867 } 868 } 869 case Fragment.STARTED: 870 if (newState > Fragment.STARTED) { 871 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 872 f.mCalled = false; 873 f.mResumed = true; 874 f.onResume(); 875 if (!f.mCalled) { 876 throw new SuperNotCalledException("Fragment " + f 877 + " did not call through to super.onResume()"); 878 } 879 // Get rid of this in case we saved it and never needed it. 880 f.mSavedFragmentState = null; 881 f.mSavedViewState = null; 882 } 883 } 884 } else if (f.mState > newState) { 885 switch (f.mState) { 886 case Fragment.RESUMED: 887 if (newState < Fragment.RESUMED) { 888 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 889 f.mCalled = false; 890 f.onPause(); 891 if (!f.mCalled) { 892 throw new SuperNotCalledException("Fragment " + f 893 + " did not call through to super.onPause()"); 894 } 895 f.mResumed = false; 896 } 897 case Fragment.STARTED: 898 if (newState < Fragment.STARTED) { 899 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 900 f.mCalled = false; 901 f.performStop(); 902 if (!f.mCalled) { 903 throw new SuperNotCalledException("Fragment " + f 904 + " did not call through to super.onStop()"); 905 } 906 } 907 case Fragment.STOPPED: 908 case Fragment.ACTIVITY_CREATED: 909 if (newState < Fragment.ACTIVITY_CREATED) { 910 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 911 if (f.mView != null) { 912 // Need to save the current view state if not 913 // done already. 914 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 915 saveFragmentViewState(f); 916 } 917 } 918 f.mCalled = false; 919 f.performDestroyView(); 920 if (!f.mCalled) { 921 throw new SuperNotCalledException("Fragment " + f 922 + " did not call through to super.onDestroyView()"); 923 } 924 if (f.mView != null && f.mContainer != null) { 925 Animator anim = null; 926 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 927 anim = loadAnimator(f, transit, false, 928 transitionStyle); 929 } 930 if (anim != null) { 931 final ViewGroup container = f.mContainer; 932 final View view = f.mView; 933 final Fragment fragment = f; 934 container.startViewTransition(view); 935 f.mAnimatingAway = anim; 936 f.mStateAfterAnimating = newState; 937 anim.addListener(new AnimatorListenerAdapter() { 938 @Override 939 public void onAnimationEnd(Animator anim) { 940 container.endViewTransition(view); 941 if (fragment.mAnimatingAway != null) { 942 fragment.mAnimatingAway = null; 943 moveToState(fragment, fragment.mStateAfterAnimating, 944 0, 0, false); 945 } 946 } 947 }); 948 anim.setTarget(f.mView); 949 anim.start(); 950 951 } 952 f.mContainer.removeView(f.mView); 953 } 954 f.mContainer = null; 955 f.mView = null; 956 } 957 case Fragment.CREATED: 958 if (newState < Fragment.CREATED) { 959 if (mDestroyed) { 960 if (f.mAnimatingAway != null) { 961 // The fragment's containing activity is 962 // being destroyed, but this fragment is 963 // currently animating away. Stop the 964 // animation right now -- it is not needed, 965 // and we can't wait any more on destroying 966 // the fragment. 967 Animator anim = f.mAnimatingAway; 968 f.mAnimatingAway = null; 969 anim.cancel(); 970 } 971 } 972 if (f.mAnimatingAway != null) { 973 // We are waiting for the fragment's view to finish 974 // animating away. Just make a note of the state 975 // the fragment now should move to once the animation 976 // is done. 977 f.mStateAfterAnimating = newState; 978 newState = Fragment.CREATED; 979 } else { 980 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 981 if (!f.mRetaining) { 982 f.mCalled = false; 983 f.onDestroy(); 984 if (!f.mCalled) { 985 throw new SuperNotCalledException("Fragment " + f 986 + " did not call through to super.onDestroy()"); 987 } 988 } 989 990 f.mCalled = false; 991 f.onDetach(); 992 if (!f.mCalled) { 993 throw new SuperNotCalledException("Fragment " + f 994 + " did not call through to super.onDetach()"); 995 } 996 if (!keepActive) { 997 if (!f.mRetaining) { 998 makeInactive(f); 999 } else { 1000 f.mActivity = null; 1001 f.mFragmentManager = null; 1002 } 1003 } 1004 } 1005 } 1006 } 1007 } 1008 1009 f.mState = newState; 1010 } 1011 1012 void moveToState(Fragment f) { 1013 moveToState(f, mCurState, 0, 0, false); 1014 } 1015 1016 void moveToState(int newState, boolean always) { 1017 moveToState(newState, 0, 0, always); 1018 } 1019 1020 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1021 if (mActivity == null && newState != Fragment.INITIALIZING) { 1022 throw new IllegalStateException("No activity"); 1023 } 1024 1025 if (!always && mCurState == newState) { 1026 return; 1027 } 1028 1029 mCurState = newState; 1030 if (mActive != null) { 1031 boolean loadersRunning = false; 1032 for (int i=0; i<mActive.size(); i++) { 1033 Fragment f = mActive.get(i); 1034 if (f != null) { 1035 moveToState(f, newState, transit, transitStyle, false); 1036 if (f.mLoaderManager != null) { 1037 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1038 } 1039 } 1040 } 1041 1042 if (!loadersRunning) { 1043 startPendingDeferredFragments(); 1044 } 1045 1046 if (mNeedMenuInvalidate && mActivity != null && mCurState == Fragment.RESUMED) { 1047 mActivity.invalidateOptionsMenu(); 1048 mNeedMenuInvalidate = false; 1049 } 1050 } 1051 } 1052 1053 void startPendingDeferredFragments() { 1054 if (mActive == null) return; 1055 1056 for (int i=0; i<mActive.size(); i++) { 1057 Fragment f = mActive.get(i); 1058 if (f != null) { 1059 performPendingDeferredStart(f); 1060 } 1061 } 1062 } 1063 1064 void makeActive(Fragment f) { 1065 if (f.mIndex >= 0) { 1066 return; 1067 } 1068 1069 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1070 if (mActive == null) { 1071 mActive = new ArrayList<Fragment>(); 1072 } 1073 f.setIndex(mActive.size()); 1074 mActive.add(f); 1075 1076 } else { 1077 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1)); 1078 mActive.set(f.mIndex, f); 1079 } 1080 if (DEBUG) Log.v(TAG, "Allocated fragment index " + f); 1081 } 1082 1083 void makeInactive(Fragment f) { 1084 if (f.mIndex < 0) { 1085 return; 1086 } 1087 1088 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f); 1089 mActive.set(f.mIndex, null); 1090 if (mAvailIndices == null) { 1091 mAvailIndices = new ArrayList<Integer>(); 1092 } 1093 mAvailIndices.add(f.mIndex); 1094 mActivity.invalidateFragmentIndex(f.mIndex); 1095 f.initState(); 1096 } 1097 1098 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1099 if (mAdded == null) { 1100 mAdded = new ArrayList<Fragment>(); 1101 } 1102 if (DEBUG) Log.v(TAG, "add: " + fragment); 1103 makeActive(fragment); 1104 if (!fragment.mDetached) { 1105 mAdded.add(fragment); 1106 fragment.mAdded = true; 1107 fragment.mRemoving = false; 1108 if (fragment.mHasMenu && fragment.mMenuVisible) { 1109 mNeedMenuInvalidate = true; 1110 } 1111 if (moveToStateNow) { 1112 moveToState(fragment); 1113 } 1114 } 1115 } 1116 1117 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1118 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1119 final boolean inactive = !fragment.isInBackStack(); 1120 if (!fragment.mDetached || inactive) { 1121 if (mAdded != null) { 1122 mAdded.remove(fragment); 1123 } 1124 if (fragment.mHasMenu && fragment.mMenuVisible) { 1125 mNeedMenuInvalidate = true; 1126 } 1127 fragment.mAdded = false; 1128 fragment.mRemoving = true; 1129 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1130 transition, transitionStyle, false); 1131 } 1132 } 1133 1134 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1135 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1136 if (!fragment.mHidden) { 1137 fragment.mHidden = true; 1138 if (fragment.mView != null) { 1139 Animator anim = loadAnimator(fragment, transition, true, 1140 transitionStyle); 1141 if (anim != null) { 1142 anim.setTarget(fragment.mView); 1143 // Delay the actual hide operation until the animation finishes, otherwise 1144 // the fragment will just immediately disappear 1145 final Fragment finalFragment = fragment; 1146 anim.addListener(new AnimatorListenerAdapter() { 1147 @Override 1148 public void onAnimationEnd(Animator animation) { 1149 if (finalFragment.mView != null) { 1150 finalFragment.mView.setVisibility(View.GONE); 1151 } 1152 } 1153 }); 1154 anim.start(); 1155 } else { 1156 fragment.mView.setVisibility(View.GONE); 1157 } 1158 } 1159 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1160 mNeedMenuInvalidate = true; 1161 } 1162 fragment.onHiddenChanged(true); 1163 } 1164 } 1165 1166 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1167 if (DEBUG) Log.v(TAG, "show: " + fragment); 1168 if (fragment.mHidden) { 1169 fragment.mHidden = false; 1170 if (fragment.mView != null) { 1171 Animator anim = loadAnimator(fragment, transition, true, 1172 transitionStyle); 1173 if (anim != null) { 1174 anim.setTarget(fragment.mView); 1175 anim.start(); 1176 } 1177 fragment.mView.setVisibility(View.VISIBLE); 1178 } 1179 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1180 mNeedMenuInvalidate = true; 1181 } 1182 fragment.onHiddenChanged(false); 1183 } 1184 } 1185 1186 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1187 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1188 if (!fragment.mDetached) { 1189 fragment.mDetached = true; 1190 if (fragment.mAdded) { 1191 // We are not already in back stack, so need to remove the fragment. 1192 if (mAdded != null) { 1193 mAdded.remove(fragment); 1194 } 1195 if (fragment.mHasMenu && fragment.mMenuVisible) { 1196 mNeedMenuInvalidate = true; 1197 } 1198 fragment.mAdded = false; 1199 moveToState(fragment, Fragment.CREATED, transition, transitionStyle, false); 1200 } 1201 } 1202 } 1203 1204 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1205 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1206 if (fragment.mDetached) { 1207 fragment.mDetached = false; 1208 if (!fragment.mAdded) { 1209 if (mAdded == null) { 1210 mAdded = new ArrayList<Fragment>(); 1211 } 1212 mAdded.add(fragment); 1213 fragment.mAdded = true; 1214 if (fragment.mHasMenu && fragment.mMenuVisible) { 1215 mNeedMenuInvalidate = true; 1216 } 1217 moveToState(fragment, mCurState, transition, transitionStyle, false); 1218 } 1219 } 1220 } 1221 1222 public Fragment findFragmentById(int id) { 1223 if (mAdded != null) { 1224 // First look through added fragments. 1225 for (int i=mAdded.size()-1; i>=0; i--) { 1226 Fragment f = mAdded.get(i); 1227 if (f != null && f.mFragmentId == id) { 1228 return f; 1229 } 1230 } 1231 } 1232 if (mActive != null) { 1233 // Now for any known fragment. 1234 for (int i=mActive.size()-1; i>=0; i--) { 1235 Fragment f = mActive.get(i); 1236 if (f != null && f.mFragmentId == id) { 1237 return f; 1238 } 1239 } 1240 } 1241 return null; 1242 } 1243 1244 public Fragment findFragmentByTag(String tag) { 1245 if (mAdded != null && tag != null) { 1246 // First look through added fragments. 1247 for (int i=mAdded.size()-1; i>=0; i--) { 1248 Fragment f = mAdded.get(i); 1249 if (f != null && tag.equals(f.mTag)) { 1250 return f; 1251 } 1252 } 1253 } 1254 if (mActive != null && tag != null) { 1255 // Now for any known fragment. 1256 for (int i=mActive.size()-1; i>=0; i--) { 1257 Fragment f = mActive.get(i); 1258 if (f != null && tag.equals(f.mTag)) { 1259 return f; 1260 } 1261 } 1262 } 1263 return null; 1264 } 1265 1266 public Fragment findFragmentByWho(String who) { 1267 if (mActive != null && who != null) { 1268 for (int i=mActive.size()-1; i>=0; i--) { 1269 Fragment f = mActive.get(i); 1270 if (f != null && who.equals(f.mWho)) { 1271 return f; 1272 } 1273 } 1274 } 1275 return null; 1276 } 1277 1278 private void checkStateLoss() { 1279 if (mStateSaved) { 1280 throw new IllegalStateException( 1281 "Can not perform this action after onSaveInstanceState"); 1282 } 1283 if (mNoTransactionsBecause != null) { 1284 throw new IllegalStateException( 1285 "Can not perform this action inside of " + mNoTransactionsBecause); 1286 } 1287 } 1288 1289 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1290 if (!allowStateLoss) { 1291 checkStateLoss(); 1292 } 1293 synchronized (this) { 1294 if (mActivity == null) { 1295 throw new IllegalStateException("Activity has been destroyed"); 1296 } 1297 if (mPendingActions == null) { 1298 mPendingActions = new ArrayList<Runnable>(); 1299 } 1300 mPendingActions.add(action); 1301 if (mPendingActions.size() == 1) { 1302 mActivity.mHandler.removeCallbacks(mExecCommit); 1303 mActivity.mHandler.post(mExecCommit); 1304 } 1305 } 1306 } 1307 1308 public int allocBackStackIndex(BackStackRecord bse) { 1309 synchronized (this) { 1310 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1311 if (mBackStackIndices == null) { 1312 mBackStackIndices = new ArrayList<BackStackRecord>(); 1313 } 1314 int index = mBackStackIndices.size(); 1315 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1316 mBackStackIndices.add(bse); 1317 return index; 1318 1319 } else { 1320 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1321 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1322 mBackStackIndices.set(index, bse); 1323 return index; 1324 } 1325 } 1326 } 1327 1328 public void setBackStackIndex(int index, BackStackRecord bse) { 1329 synchronized (this) { 1330 if (mBackStackIndices == null) { 1331 mBackStackIndices = new ArrayList<BackStackRecord>(); 1332 } 1333 int N = mBackStackIndices.size(); 1334 if (index < N) { 1335 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1336 mBackStackIndices.set(index, bse); 1337 } else { 1338 while (N < index) { 1339 mBackStackIndices.add(null); 1340 if (mAvailBackStackIndices == null) { 1341 mAvailBackStackIndices = new ArrayList<Integer>(); 1342 } 1343 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1344 mAvailBackStackIndices.add(N); 1345 N++; 1346 } 1347 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1348 mBackStackIndices.add(bse); 1349 } 1350 } 1351 } 1352 1353 public void freeBackStackIndex(int index) { 1354 synchronized (this) { 1355 mBackStackIndices.set(index, null); 1356 if (mAvailBackStackIndices == null) { 1357 mAvailBackStackIndices = new ArrayList<Integer>(); 1358 } 1359 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1360 mAvailBackStackIndices.add(index); 1361 } 1362 } 1363 1364 /** 1365 * Only call from main thread! 1366 */ 1367 public boolean execPendingActions() { 1368 if (mExecutingActions) { 1369 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1370 } 1371 1372 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1373 throw new IllegalStateException("Must be called from main thread of process"); 1374 } 1375 1376 boolean didSomething = false; 1377 1378 while (true) { 1379 int numActions; 1380 1381 synchronized (this) { 1382 if (mPendingActions == null || mPendingActions.size() == 0) { 1383 break; 1384 } 1385 1386 numActions = mPendingActions.size(); 1387 if (mTmpActions == null || mTmpActions.length < numActions) { 1388 mTmpActions = new Runnable[numActions]; 1389 } 1390 mPendingActions.toArray(mTmpActions); 1391 mPendingActions.clear(); 1392 mActivity.mHandler.removeCallbacks(mExecCommit); 1393 } 1394 1395 mExecutingActions = true; 1396 for (int i=0; i<numActions; i++) { 1397 mTmpActions[i].run(); 1398 mTmpActions[i] = null; 1399 } 1400 mExecutingActions = false; 1401 didSomething = true; 1402 } 1403 1404 if (mHavePendingDeferredStart) { 1405 boolean loadersRunning = false; 1406 for (int i=0; i<mActive.size(); i++) { 1407 Fragment f = mActive.get(i); 1408 if (f != null && f.mLoaderManager != null) { 1409 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1410 } 1411 } 1412 if (!loadersRunning) { 1413 mHavePendingDeferredStart = false; 1414 startPendingDeferredFragments(); 1415 } 1416 } 1417 return didSomething; 1418 } 1419 1420 void reportBackStackChanged() { 1421 if (mBackStackChangeListeners != null) { 1422 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1423 mBackStackChangeListeners.get(i).onBackStackChanged(); 1424 } 1425 } 1426 } 1427 1428 void addBackStackState(BackStackRecord state) { 1429 if (mBackStack == null) { 1430 mBackStack = new ArrayList<BackStackRecord>(); 1431 } 1432 mBackStack.add(state); 1433 reportBackStackChanged(); 1434 } 1435 1436 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1437 if (mBackStack == null) { 1438 return false; 1439 } 1440 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1441 int last = mBackStack.size()-1; 1442 if (last < 0) { 1443 return false; 1444 } 1445 final BackStackRecord bss = mBackStack.remove(last); 1446 bss.popFromBackStack(true); 1447 reportBackStackChanged(); 1448 } else { 1449 int index = -1; 1450 if (name != null || id >= 0) { 1451 // If a name or ID is specified, look for that place in 1452 // the stack. 1453 index = mBackStack.size()-1; 1454 while (index >= 0) { 1455 BackStackRecord bss = mBackStack.get(index); 1456 if (name != null && name.equals(bss.getName())) { 1457 break; 1458 } 1459 if (id >= 0 && id == bss.mIndex) { 1460 break; 1461 } 1462 index--; 1463 } 1464 if (index < 0) { 1465 return false; 1466 } 1467 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1468 index--; 1469 // Consume all following entries that match. 1470 while (index >= 0) { 1471 BackStackRecord bss = mBackStack.get(index); 1472 if ((name != null && name.equals(bss.getName())) 1473 || (id >= 0 && id == bss.mIndex)) { 1474 index--; 1475 continue; 1476 } 1477 break; 1478 } 1479 } 1480 } 1481 if (index == mBackStack.size()-1) { 1482 return false; 1483 } 1484 final ArrayList<BackStackRecord> states 1485 = new ArrayList<BackStackRecord>(); 1486 for (int i=mBackStack.size()-1; i>index; i--) { 1487 states.add(mBackStack.remove(i)); 1488 } 1489 final int LAST = states.size()-1; 1490 for (int i=0; i<=LAST; i++) { 1491 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1492 states.get(i).popFromBackStack(i == LAST); 1493 } 1494 reportBackStackChanged(); 1495 } 1496 return true; 1497 } 1498 1499 ArrayList<Fragment> retainNonConfig() { 1500 ArrayList<Fragment> fragments = null; 1501 if (mActive != null) { 1502 for (int i=0; i<mActive.size(); i++) { 1503 Fragment f = mActive.get(i); 1504 if (f != null && f.mRetainInstance) { 1505 if (fragments == null) { 1506 fragments = new ArrayList<Fragment>(); 1507 } 1508 fragments.add(f); 1509 f.mRetaining = true; 1510 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1511 if (DEBUG) Log.v(TAG, "retainNonConfig: keeping retained " + f); 1512 } 1513 } 1514 } 1515 return fragments; 1516 } 1517 1518 void saveFragmentViewState(Fragment f) { 1519 if (f.mView == null) { 1520 return; 1521 } 1522 if (mStateArray == null) { 1523 mStateArray = new SparseArray<Parcelable>(); 1524 } else { 1525 mStateArray.clear(); 1526 } 1527 f.mView.saveHierarchyState(mStateArray); 1528 if (mStateArray.size() > 0) { 1529 f.mSavedViewState = mStateArray; 1530 mStateArray = null; 1531 } 1532 } 1533 1534 Bundle saveFragmentBasicState(Fragment f) { 1535 Bundle result = null; 1536 1537 if (mStateBundle == null) { 1538 mStateBundle = new Bundle(); 1539 } 1540 f.onSaveInstanceState(mStateBundle); 1541 if (!mStateBundle.isEmpty()) { 1542 result = mStateBundle; 1543 mStateBundle = null; 1544 } 1545 1546 if (f.mView != null) { 1547 saveFragmentViewState(f); 1548 } 1549 if (f.mSavedViewState != null) { 1550 if (result == null) { 1551 result = new Bundle(); 1552 } 1553 result.putSparseParcelableArray( 1554 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1555 } 1556 if (!f.mUserVisibleHint) { 1557 if (result == null) { 1558 result = new Bundle(); 1559 } 1560 // Only add this if it's not the default value 1561 result.putBoolean(FragmentManagerImpl.USER_VISIBLE_HINT_TAG, f.mUserVisibleHint); 1562 } 1563 1564 return result; 1565 } 1566 1567 Parcelable saveAllState() { 1568 // Make sure all pending operations have now been executed to get 1569 // our state update-to-date. 1570 execPendingActions(); 1571 1572 mStateSaved = true; 1573 1574 if (mActive == null || mActive.size() <= 0) { 1575 return null; 1576 } 1577 1578 // First collect all active fragments. 1579 int N = mActive.size(); 1580 FragmentState[] active = new FragmentState[N]; 1581 boolean haveFragments = false; 1582 for (int i=0; i<N; i++) { 1583 Fragment f = mActive.get(i); 1584 if (f != null) { 1585 if (f.mIndex < 0) { 1586 String msg = "Failure saving state: active " + f 1587 + " has cleared index: " + f.mIndex; 1588 Slog.e(TAG, msg); 1589 dump(" ", null, new PrintWriter(new LogWriter( 1590 Log.ERROR, TAG, Log.LOG_ID_SYSTEM)), new String[] { }); 1591 throw new IllegalStateException(msg); 1592 } 1593 1594 haveFragments = true; 1595 1596 FragmentState fs = new FragmentState(f); 1597 active[i] = fs; 1598 1599 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1600 fs.mSavedFragmentState = saveFragmentBasicState(f); 1601 1602 if (f.mTarget != null) { 1603 if (f.mTarget.mIndex < 0) { 1604 String msg = "Failure saving state: " + f 1605 + " has target not in fragment manager: " + f.mTarget; 1606 Slog.e(TAG, msg); 1607 dump(" ", null, new PrintWriter(new LogWriter( 1608 Log.ERROR, TAG, Log.LOG_ID_SYSTEM)), new String[] { }); 1609 throw new IllegalStateException(msg); 1610 } 1611 if (fs.mSavedFragmentState == null) { 1612 fs.mSavedFragmentState = new Bundle(); 1613 } 1614 putFragment(fs.mSavedFragmentState, 1615 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1616 if (f.mTargetRequestCode != 0) { 1617 fs.mSavedFragmentState.putInt( 1618 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1619 f.mTargetRequestCode); 1620 } 1621 } 1622 1623 } else { 1624 fs.mSavedFragmentState = f.mSavedFragmentState; 1625 } 1626 1627 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1628 + fs.mSavedFragmentState); 1629 } 1630 } 1631 1632 if (!haveFragments) { 1633 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1634 return null; 1635 } 1636 1637 int[] added = null; 1638 BackStackState[] backStack = null; 1639 1640 // Build list of currently added fragments. 1641 if (mAdded != null) { 1642 N = mAdded.size(); 1643 if (N > 0) { 1644 added = new int[N]; 1645 for (int i=0; i<N; i++) { 1646 added[i] = mAdded.get(i).mIndex; 1647 if (added[i] < 0) { 1648 String msg = "Failure saving state: active " + mAdded.get(i) 1649 + " has cleared index: " + added[i]; 1650 Slog.e(TAG, msg); 1651 dump(" ", null, new PrintWriter(new LogWriter( 1652 Log.ERROR, TAG, Log.LOG_ID_SYSTEM)), new String[] { }); 1653 throw new IllegalStateException(msg); 1654 } 1655 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1656 + ": " + mAdded.get(i)); 1657 } 1658 } 1659 } 1660 1661 // Now save back stack. 1662 if (mBackStack != null) { 1663 N = mBackStack.size(); 1664 if (N > 0) { 1665 backStack = new BackStackState[N]; 1666 for (int i=0; i<N; i++) { 1667 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1668 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1669 + ": " + mBackStack.get(i)); 1670 } 1671 } 1672 } 1673 1674 FragmentManagerState fms = new FragmentManagerState(); 1675 fms.mActive = active; 1676 fms.mAdded = added; 1677 fms.mBackStack = backStack; 1678 return fms; 1679 } 1680 1681 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1682 // If there is no saved state at all, then there can not be 1683 // any nonConfig fragments either, so that is that. 1684 if (state == null) return; 1685 FragmentManagerState fms = (FragmentManagerState)state; 1686 if (fms.mActive == null) return; 1687 1688 // First re-attach any non-config instances we are retaining back 1689 // to their saved state, so we don't try to instantiate them again. 1690 if (nonConfig != null) { 1691 for (int i=0; i<nonConfig.size(); i++) { 1692 Fragment f = nonConfig.get(i); 1693 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1694 FragmentState fs = fms.mActive[f.mIndex]; 1695 fs.mInstance = f; 1696 f.mSavedViewState = null; 1697 f.mBackStackNesting = 0; 1698 f.mInLayout = false; 1699 f.mAdded = false; 1700 f.mTarget = null; 1701 if (fs.mSavedFragmentState != null) { 1702 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1703 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1704 FragmentManagerImpl.VIEW_STATE_TAG); 1705 } 1706 } 1707 } 1708 1709 // Build the full list of active fragments, instantiating them from 1710 // their saved state. 1711 mActive = new ArrayList<Fragment>(fms.mActive.length); 1712 if (mAvailIndices != null) { 1713 mAvailIndices.clear(); 1714 } 1715 for (int i=0; i<fms.mActive.length; i++) { 1716 FragmentState fs = fms.mActive[i]; 1717 if (fs != null) { 1718 Fragment f = fs.instantiate(mActivity); 1719 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1720 mActive.add(f); 1721 // Now that the fragment is instantiated (or came from being 1722 // retained above), clear mInstance in case we end up re-restoring 1723 // from this FragmentState again. 1724 fs.mInstance = null; 1725 } else { 1726 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1727 mActive.add(null); 1728 if (mAvailIndices == null) { 1729 mAvailIndices = new ArrayList<Integer>(); 1730 } 1731 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1732 mAvailIndices.add(i); 1733 } 1734 } 1735 1736 // Update the target of all retained fragments. 1737 if (nonConfig != null) { 1738 for (int i=0; i<nonConfig.size(); i++) { 1739 Fragment f = nonConfig.get(i); 1740 if (f.mTargetIndex >= 0) { 1741 if (f.mTargetIndex < mActive.size()) { 1742 f.mTarget = mActive.get(f.mTargetIndex); 1743 } else { 1744 Log.w(TAG, "Re-attaching retained fragment " + f 1745 + " target no longer exists: " + f.mTargetIndex); 1746 f.mTarget = null; 1747 } 1748 } 1749 } 1750 } 1751 1752 // Build the list of currently added fragments. 1753 if (fms.mAdded != null) { 1754 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1755 for (int i=0; i<fms.mAdded.length; i++) { 1756 Fragment f = mActive.get(fms.mAdded[i]); 1757 if (f == null) { 1758 throw new IllegalStateException( 1759 "No instantiated fragment for index #" + fms.mAdded[i]); 1760 } 1761 f.mAdded = true; 1762 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1763 mAdded.add(f); 1764 } 1765 } else { 1766 mAdded = null; 1767 } 1768 1769 // Build the back stack. 1770 if (fms.mBackStack != null) { 1771 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1772 for (int i=0; i<fms.mBackStack.length; i++) { 1773 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1774 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1775 + " (index " + bse.mIndex + "): " + bse); 1776 mBackStack.add(bse); 1777 if (bse.mIndex >= 0) { 1778 setBackStackIndex(bse.mIndex, bse); 1779 } 1780 } 1781 } else { 1782 mBackStack = null; 1783 } 1784 } 1785 1786 public void attachActivity(Activity activity) { 1787 if (mActivity != null) throw new IllegalStateException(); 1788 mActivity = activity; 1789 } 1790 1791 public void noteStateNotSaved() { 1792 mStateSaved = false; 1793 } 1794 1795 public void dispatchCreate() { 1796 mStateSaved = false; 1797 moveToState(Fragment.CREATED, false); 1798 } 1799 1800 public void dispatchActivityCreated() { 1801 mStateSaved = false; 1802 moveToState(Fragment.ACTIVITY_CREATED, false); 1803 } 1804 1805 public void dispatchStart() { 1806 mStateSaved = false; 1807 moveToState(Fragment.STARTED, false); 1808 } 1809 1810 public void dispatchResume() { 1811 mStateSaved = false; 1812 moveToState(Fragment.RESUMED, false); 1813 } 1814 1815 public void dispatchPause() { 1816 moveToState(Fragment.STARTED, false); 1817 } 1818 1819 public void dispatchStop() { 1820 moveToState(Fragment.STOPPED, false); 1821 } 1822 1823 public void dispatchDestroy() { 1824 mDestroyed = true; 1825 execPendingActions(); 1826 moveToState(Fragment.INITIALIZING, false); 1827 mActivity = null; 1828 } 1829 1830 public void dispatchConfigurationChanged(Configuration newConfig) { 1831 if (mAdded != null) { 1832 for (int i=0; i<mAdded.size(); i++) { 1833 Fragment f = mAdded.get(i); 1834 if (f != null) { 1835 f.onConfigurationChanged(newConfig); 1836 } 1837 } 1838 } 1839 } 1840 1841 public void dispatchLowMemory() { 1842 if (mAdded != null) { 1843 for (int i=0; i<mAdded.size(); i++) { 1844 Fragment f = mAdded.get(i); 1845 if (f != null) { 1846 f.onLowMemory(); 1847 } 1848 } 1849 } 1850 } 1851 1852 public void dispatchTrimMemory(int level) { 1853 if (mAdded != null) { 1854 for (int i=0; i<mAdded.size(); i++) { 1855 Fragment f = mAdded.get(i); 1856 if (f != null) { 1857 f.onTrimMemory(level); 1858 } 1859 } 1860 } 1861 } 1862 1863 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1864 boolean show = false; 1865 ArrayList<Fragment> newMenus = null; 1866 if (mAdded != null) { 1867 for (int i=0; i<mAdded.size(); i++) { 1868 Fragment f = mAdded.get(i); 1869 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1870 show = true; 1871 f.onCreateOptionsMenu(menu, inflater); 1872 if (newMenus == null) { 1873 newMenus = new ArrayList<Fragment>(); 1874 } 1875 newMenus.add(f); 1876 } 1877 } 1878 } 1879 1880 if (mCreatedMenus != null) { 1881 for (int i=0; i<mCreatedMenus.size(); i++) { 1882 Fragment f = mCreatedMenus.get(i); 1883 if (newMenus == null || !newMenus.contains(f)) { 1884 f.onDestroyOptionsMenu(); 1885 } 1886 } 1887 } 1888 1889 mCreatedMenus = newMenus; 1890 1891 return show; 1892 } 1893 1894 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1895 boolean show = false; 1896 if (mAdded != null) { 1897 for (int i=0; i<mAdded.size(); i++) { 1898 Fragment f = mAdded.get(i); 1899 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1900 show = true; 1901 f.onPrepareOptionsMenu(menu); 1902 } 1903 } 1904 } 1905 return show; 1906 } 1907 1908 public boolean dispatchOptionsItemSelected(MenuItem item) { 1909 if (mAdded != null) { 1910 for (int i=0; i<mAdded.size(); i++) { 1911 Fragment f = mAdded.get(i); 1912 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1913 if (f.onOptionsItemSelected(item)) { 1914 return true; 1915 } 1916 } 1917 } 1918 } 1919 return false; 1920 } 1921 1922 public boolean dispatchContextItemSelected(MenuItem item) { 1923 if (mAdded != null) { 1924 for (int i=0; i<mAdded.size(); i++) { 1925 Fragment f = mAdded.get(i); 1926 if (f != null && !f.mHidden) { 1927 if (f.onContextItemSelected(item)) { 1928 return true; 1929 } 1930 } 1931 } 1932 } 1933 return false; 1934 } 1935 1936 public void dispatchOptionsMenuClosed(Menu menu) { 1937 if (mAdded != null) { 1938 for (int i=0; i<mAdded.size(); i++) { 1939 Fragment f = mAdded.get(i); 1940 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1941 f.onOptionsMenuClosed(menu); 1942 } 1943 } 1944 } 1945 } 1946 1947 @Override 1948 public void invalidateOptionsMenu() { 1949 if (mActivity != null && mCurState == Fragment.RESUMED) { 1950 mActivity.invalidateOptionsMenu(); 1951 } else { 1952 mNeedMenuInvalidate = true; 1953 } 1954 } 1955 1956 public static int reverseTransit(int transit) { 1957 int rev = 0; 1958 switch (transit) { 1959 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1960 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1961 break; 1962 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1963 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1964 break; 1965 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1966 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 1967 break; 1968 } 1969 return rev; 1970 1971 } 1972 1973 public static int transitToStyleIndex(int transit, boolean enter) { 1974 int animAttr = -1; 1975 switch (transit) { 1976 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1977 animAttr = enter 1978 ? com.android.internal.R.styleable.FragmentAnimation_fragmentOpenEnterAnimation 1979 : com.android.internal.R.styleable.FragmentAnimation_fragmentOpenExitAnimation; 1980 break; 1981 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1982 animAttr = enter 1983 ? com.android.internal.R.styleable.FragmentAnimation_fragmentCloseEnterAnimation 1984 : com.android.internal.R.styleable.FragmentAnimation_fragmentCloseExitAnimation; 1985 break; 1986 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1987 animAttr = enter 1988 ? com.android.internal.R.styleable.FragmentAnimation_fragmentFadeEnterAnimation 1989 : com.android.internal.R.styleable.FragmentAnimation_fragmentFadeExitAnimation; 1990 break; 1991 } 1992 return animAttr; 1993 } 1994} 1995