FragmentManager.java revision 7187ccb93ee8adbb745fcbb901cfacfeed397a23
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 */ 49public abstract class FragmentManager { 50 /** 51 * Representation of an entry on the fragment back stack, as created 52 * with {@link FragmentTransaction#addToBackStack(String) 53 * FragmentTransaction.addToBackStack()}. Entries can later be 54 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 55 * FragmentManager.getBackStackEntry()}. 56 * 57 * <p>Note that you should never hold on to a BackStackEntry object; 58 * the identifier as returned by {@link #getId} is the only thing that 59 * will be persisted across activity instances. 60 */ 61 public interface BackStackEntry { 62 /** 63 * Return the unique identifier for the entry. This is the only 64 * representation of the entry that will persist across activity 65 * instances. 66 */ 67 public int getId(); 68 69 /** 70 * Return the full bread crumb title resource identifier for the entry, 71 * or 0 if it does not have one. 72 */ 73 public int getBreadCrumbTitleRes(); 74 75 /** 76 * Return the short bread crumb title resource identifier for the entry, 77 * or 0 if it does not have one. 78 */ 79 public int getBreadCrumbShortTitleRes(); 80 81 /** 82 * Return the full bread crumb title for the entry, or null if it 83 * does not have one. 84 */ 85 public CharSequence getBreadCrumbTitle(); 86 87 /** 88 * Return the short bread crumb title for the entry, or null if it 89 * does not have one. 90 */ 91 public CharSequence getBreadCrumbShortTitle(); 92 } 93 94 /** 95 * Interface to watch for changes to the back stack. 96 */ 97 public interface OnBackStackChangedListener { 98 /** 99 * Called whenever the contents of the back stack change. 100 */ 101 public void onBackStackChanged(); 102 } 103 104 /** 105 * Start a series of edit operations on the Fragments associated with 106 * this FragmentManager. 107 * 108 * <p>Note: A fragment transaction can only be created/committed prior 109 * to an activity saving its state. If you try to commit a transaction 110 * after {@link Activity#onSaveInstanceState Activity.onSaveInstanceState()} 111 * (and prior to a following {@link Activity#onStart Activity.onStart} 112 * or {@link Activity#onResume Activity.onResume()}, you will get an error. 113 * This is because the framework takes care of saving your current fragments 114 * in the state, and if changes are made after the state is saved then they 115 * will be lost.</p> 116 */ 117 public abstract FragmentTransaction beginTransaction(); 118 119 /** @hide -- remove once prebuilts are in. */ 120 @Deprecated 121 public FragmentTransaction openTransaction() { 122 return beginTransaction(); 123 } 124 125 /** 126 * After a {@link FragmentTransaction} is committed with 127 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 128 * is scheduled to be executed asynchronously on the process's main thread. 129 * If you want to immediately executing any such pending operations, you 130 * can call this function (only from the main thread) to do so. Note that 131 * all callbacks and other related behavior will be done from within this 132 * call, so be careful about where this is called from. 133 * 134 * @return Returns true if there were any pending transactions to be 135 * executed. 136 */ 137 public abstract boolean executePendingTransactions(); 138 139 /** 140 * Finds a fragment that was identified by the given id either when inflated 141 * from XML or as the container ID when added in a transaction. This first 142 * searches through fragments that are currently added to the manager's 143 * activity; if no such fragment is found, then all fragments currently 144 * on the back stack associated with this ID are searched. 145 * @return The fragment if found or null otherwise. 146 */ 147 public abstract Fragment findFragmentById(int id); 148 149 /** 150 * Finds a fragment that was identified by the given tag either when inflated 151 * from XML or as supplied when added in a transaction. This first 152 * searches through fragments that are currently added to the manager's 153 * activity; if no such fragment is found, then all fragments currently 154 * on the back stack are searched. 155 * @return The fragment if found or null otherwise. 156 */ 157 public abstract Fragment findFragmentByTag(String tag); 158 159 /** 160 * Flag for {@link #popBackStack(String, int)} 161 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 162 * a back stack entry has been supplied, then all matching entries will 163 * be consumed until one that doesn't match is found or the bottom of 164 * the stack is reached. Otherwise, all entries up to but not including that entry 165 * will be removed. 166 */ 167 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 168 169 /** 170 * Pop the top state off the back stack. Returns true if there was one 171 * to pop, else false. This function is asynchronous -- it enqueues the 172 * request to pop, but the action will not be performed until the application 173 * returns to its event loop. 174 */ 175 public abstract void popBackStack(); 176 177 /** 178 * Like {@link #popBackStack()}, but performs the operation immediately 179 * inside of the call. This is like calling {@link #executePendingTransactions()} 180 * afterwards. 181 * @return Returns true if there was something popped, else false. 182 */ 183 public abstract boolean popBackStackImmediate(); 184 185 /** 186 * Pop the last fragment transition from the manager's fragment 187 * back stack. If there is nothing to pop, false is returned. 188 * This function is asynchronous -- it enqueues the 189 * request to pop, but the action will not be performed until the application 190 * returns to its event loop. 191 * 192 * @param name If non-null, this is the name of a previous back state 193 * to look for; if found, all states up to that state will be popped. The 194 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 195 * the named state itself is popped. If null, only the top state is popped. 196 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 197 */ 198 public abstract void popBackStack(String name, int flags); 199 200 /** 201 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 202 * inside of the call. This is like calling {@link #executePendingTransactions()} 203 * afterwards. 204 * @return Returns true if there was something popped, else false. 205 */ 206 public abstract boolean popBackStackImmediate(String name, int flags); 207 208 /** 209 * Pop all back stack states up to the one with the given identifier. 210 * This function is asynchronous -- it enqueues the 211 * request to pop, but the action will not be performed until the application 212 * returns to its event loop. 213 * 214 * @param id Identifier of the stated to be popped. If no identifier exists, 215 * false is returned. 216 * The identifier is the number returned by 217 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 218 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 219 * the named state itself is popped. 220 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 221 */ 222 public abstract void popBackStack(int id, int flags); 223 224 /** 225 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 226 * inside of the call. This is like calling {@link #executePendingTransactions()} 227 * afterwards. 228 * @return Returns true if there was something popped, else false. 229 */ 230 public abstract boolean popBackStackImmediate(int id, int flags); 231 232 /** 233 * Return the number of entries currently in the back stack. 234 */ 235 public abstract int getBackStackEntryCount(); 236 237 /** 238 * Return the BackStackEntry at index <var>index</var> in the back stack; 239 * entries start index 0 being the bottom of the stack. 240 */ 241 public abstract BackStackEntry getBackStackEntryAt(int index); 242 243 /** 244 * Add a new listener for changes to the fragment back stack. 245 */ 246 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 247 248 /** 249 * Remove a listener that was previously added with 250 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 251 */ 252 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 253 254 /** 255 * Put a reference to a fragment in a Bundle. This Bundle can be 256 * persisted as saved state, and when later restoring 257 * {@link #getFragment(Bundle, String)} will return the current 258 * instance of the same fragment. 259 * 260 * @param bundle The bundle in which to put the fragment reference. 261 * @param key The name of the entry in the bundle. 262 * @param fragment The Fragment whose reference is to be stored. 263 */ 264 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 265 266 /** 267 * Retrieve the current Fragment instance for a reference previously 268 * placed with {@link #putFragment(Bundle, String, Fragment)}. 269 * 270 * @param bundle The bundle from which to retrieve the fragment reference. 271 * @param key The name of the entry in the bundle. 272 * @return Returns the current Fragment instance that is associated with 273 * the given reference. 274 */ 275 public abstract Fragment getFragment(Bundle bundle, String key); 276 277 /** 278 * Print the FragmentManager's state into the given stream. 279 * 280 * @param prefix Text to print at the front of each line. 281 * @param fd The raw file descriptor that the dump is being sent to. 282 * @param writer A PrintWriter to which the dump is to be set. 283 * @param args Additional arguments to the dump request. 284 */ 285 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 286 287 /** 288 * Control whether the framework's internal fragment manager debugging 289 * logs are turned on. If enabled, you will see output in logcat as 290 * the framework performs fragment operations. 291 */ 292 public static void enableDebugLogging(boolean enabled) { 293 FragmentManagerImpl.DEBUG = enabled; 294 } 295} 296 297final class FragmentManagerState implements Parcelable { 298 FragmentState[] mActive; 299 int[] mAdded; 300 BackStackState[] mBackStack; 301 302 public FragmentManagerState() { 303 } 304 305 public FragmentManagerState(Parcel in) { 306 mActive = in.createTypedArray(FragmentState.CREATOR); 307 mAdded = in.createIntArray(); 308 mBackStack = in.createTypedArray(BackStackState.CREATOR); 309 } 310 311 public int describeContents() { 312 return 0; 313 } 314 315 public void writeToParcel(Parcel dest, int flags) { 316 dest.writeTypedArray(mActive, flags); 317 dest.writeIntArray(mAdded); 318 dest.writeTypedArray(mBackStack, flags); 319 } 320 321 public static final Parcelable.Creator<FragmentManagerState> CREATOR 322 = new Parcelable.Creator<FragmentManagerState>() { 323 public FragmentManagerState createFromParcel(Parcel in) { 324 return new FragmentManagerState(in); 325 } 326 327 public FragmentManagerState[] newArray(int size) { 328 return new FragmentManagerState[size]; 329 } 330 }; 331} 332 333/** 334 * Container for fragments associated with an activity. 335 */ 336final class FragmentManagerImpl extends FragmentManager { 337 static boolean DEBUG = false; 338 static final String TAG = "FragmentManager"; 339 340 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 341 static final String TARGET_STATE_TAG = "android:target_state"; 342 static final String VIEW_STATE_TAG = "android:view_state"; 343 344 ArrayList<Runnable> mPendingActions; 345 Runnable[] mTmpActions; 346 boolean mExecutingActions; 347 348 ArrayList<Fragment> mActive; 349 ArrayList<Fragment> mAdded; 350 ArrayList<Integer> mAvailIndices; 351 ArrayList<BackStackRecord> mBackStack; 352 ArrayList<Fragment> mCreatedMenus; 353 354 // Must be accessed while locked. 355 ArrayList<BackStackRecord> mBackStackIndices; 356 ArrayList<Integer> mAvailBackStackIndices; 357 358 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 359 360 int mCurState = Fragment.INITIALIZING; 361 Activity mActivity; 362 363 boolean mNeedMenuInvalidate; 364 boolean mStateSaved; 365 boolean mDestroyed; 366 String mNoTransactionsBecause; 367 368 // Temporary vars for state save and restore. 369 Bundle mStateBundle = null; 370 SparseArray<Parcelable> mStateArray = null; 371 372 Runnable mExecCommit = new Runnable() { 373 @Override 374 public void run() { 375 execPendingActions(); 376 } 377 }; 378 379 @Override 380 public FragmentTransaction beginTransaction() { 381 return new BackStackRecord(this); 382 } 383 384 @Override 385 public boolean executePendingTransactions() { 386 return execPendingActions(); 387 } 388 389 @Override 390 public void popBackStack() { 391 enqueueAction(new Runnable() { 392 @Override public void run() { 393 popBackStackState(mActivity.mHandler, null, -1, 0); 394 } 395 }, false); 396 } 397 398 @Override 399 public boolean popBackStackImmediate() { 400 checkStateLoss(); 401 executePendingTransactions(); 402 return popBackStackState(mActivity.mHandler, null, -1, 0); 403 } 404 405 @Override 406 public void popBackStack(final String name, final int flags) { 407 enqueueAction(new Runnable() { 408 @Override public void run() { 409 popBackStackState(mActivity.mHandler, name, -1, flags); 410 } 411 }, false); 412 } 413 414 @Override 415 public boolean popBackStackImmediate(String name, int flags) { 416 checkStateLoss(); 417 executePendingTransactions(); 418 return popBackStackState(mActivity.mHandler, name, -1, flags); 419 } 420 421 @Override 422 public void popBackStack(final int id, final int flags) { 423 if (id < 0) { 424 throw new IllegalArgumentException("Bad id: " + id); 425 } 426 enqueueAction(new Runnable() { 427 @Override public void run() { 428 popBackStackState(mActivity.mHandler, null, id, flags); 429 } 430 }, false); 431 } 432 433 @Override 434 public boolean popBackStackImmediate(int id, int flags) { 435 checkStateLoss(); 436 executePendingTransactions(); 437 if (id < 0) { 438 throw new IllegalArgumentException("Bad id: " + id); 439 } 440 return popBackStackState(mActivity.mHandler, null, id, flags); 441 } 442 443 @Override 444 public int getBackStackEntryCount() { 445 return mBackStack != null ? mBackStack.size() : 0; 446 } 447 448 @Override 449 public BackStackEntry getBackStackEntryAt(int index) { 450 return mBackStack.get(index); 451 } 452 453 @Override 454 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 455 if (mBackStackChangeListeners == null) { 456 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 457 } 458 mBackStackChangeListeners.add(listener); 459 } 460 461 @Override 462 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 463 if (mBackStackChangeListeners != null) { 464 mBackStackChangeListeners.remove(listener); 465 } 466 } 467 468 @Override 469 public void putFragment(Bundle bundle, String key, Fragment fragment) { 470 if (fragment.mIndex < 0) { 471 throw new IllegalStateException("Fragment " + fragment 472 + " is not currently in the FragmentManager"); 473 } 474 bundle.putInt(key, fragment.mIndex); 475 } 476 477 @Override 478 public Fragment getFragment(Bundle bundle, String key) { 479 int index = bundle.getInt(key, -1); 480 if (index == -1) { 481 return null; 482 } 483 if (index >= mActive.size()) { 484 throw new IllegalStateException("Fragement no longer exists for key " 485 + key + ": index " + index); 486 } 487 Fragment f = mActive.get(index); 488 if (f == null) { 489 throw new IllegalStateException("Fragement no longer exists for key " 490 + key + ": index " + index); 491 } 492 return f; 493 } 494 495 @Override 496 public String toString() { 497 StringBuilder sb = new StringBuilder(128); 498 sb.append("FragmentManager{"); 499 sb.append(Integer.toHexString(System.identityHashCode(this))); 500 sb.append(" in "); 501 DebugUtils.buildShortClassTag(mActivity, sb); 502 sb.append("}}"); 503 return sb.toString(); 504 } 505 506 @Override 507 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 508 String innerPrefix = prefix + " "; 509 510 int N; 511 if (mActive != null) { 512 N = mActive.size(); 513 if (N > 0) { 514 writer.print(prefix); writer.print("Active Fragments in "); 515 writer.print(Integer.toHexString(System.identityHashCode(this))); 516 writer.println(":"); 517 for (int i=0; i<N; i++) { 518 Fragment f = mActive.get(i); 519 writer.print(prefix); writer.print(" #"); writer.print(i); 520 writer.print(": "); writer.println(f); 521 if (f != null) { 522 f.dump(innerPrefix, fd, writer, args); 523 } 524 } 525 } 526 } 527 528 if (mAdded != null) { 529 N = mAdded.size(); 530 if (N > 0) { 531 writer.print(prefix); writer.println("Added Fragments:"); 532 for (int i=0; i<N; i++) { 533 Fragment f = mAdded.get(i); 534 writer.print(prefix); writer.print(" #"); writer.print(i); 535 writer.print(": "); writer.println(f.toString()); 536 } 537 } 538 } 539 540 if (mCreatedMenus != null) { 541 N = mCreatedMenus.size(); 542 if (N > 0) { 543 writer.print(prefix); writer.println("Fragments Created Menus:"); 544 for (int i=0; i<N; i++) { 545 Fragment f = mCreatedMenus.get(i); 546 writer.print(prefix); writer.print(" #"); writer.print(i); 547 writer.print(": "); writer.println(f.toString()); 548 } 549 } 550 } 551 552 if (mBackStack != null) { 553 N = mBackStack.size(); 554 if (N > 0) { 555 writer.print(prefix); writer.println("Back Stack:"); 556 for (int i=0; i<N; i++) { 557 BackStackRecord bs = mBackStack.get(i); 558 writer.print(prefix); writer.print(" #"); writer.print(i); 559 writer.print(": "); writer.println(bs.toString()); 560 bs.dump(innerPrefix, fd, writer, args); 561 } 562 } 563 } 564 565 synchronized (this) { 566 if (mBackStackIndices != null) { 567 N = mBackStackIndices.size(); 568 if (N > 0) { 569 writer.print(prefix); writer.println("Back Stack Indices:"); 570 for (int i=0; i<N; i++) { 571 BackStackRecord bs = mBackStackIndices.get(i); 572 writer.print(prefix); writer.print(" #"); writer.print(i); 573 writer.print(": "); writer.println(bs); 574 } 575 } 576 } 577 578 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 579 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 580 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 581 } 582 } 583 584 if (mPendingActions != null) { 585 N = mPendingActions.size(); 586 if (N > 0) { 587 writer.print(prefix); writer.println("Pending Actions:"); 588 for (int i=0; i<N; i++) { 589 Runnable r = mPendingActions.get(i); 590 writer.print(prefix); writer.print(" #"); writer.print(i); 591 writer.print(": "); writer.println(r); 592 } 593 } 594 } 595 596 writer.print(prefix); writer.println("FragmentManager misc state:"); 597 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 598 writer.print(" mStateSaved="); writer.print(mStateSaved); 599 writer.print(" mDestroyed="); writer.println(mDestroyed); 600 if (mNeedMenuInvalidate) { 601 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 602 writer.println(mNeedMenuInvalidate); 603 } 604 if (mNoTransactionsBecause != null) { 605 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 606 writer.println(mNoTransactionsBecause); 607 } 608 if (mAvailIndices != null && mAvailIndices.size() > 0) { 609 writer.print(prefix); writer.print(" mAvailIndices: "); 610 writer.println(Arrays.toString(mAvailIndices.toArray())); 611 } 612 } 613 614 Animator loadAnimator(Fragment fragment, int transit, boolean enter, 615 int transitionStyle) { 616 Animator animObj = fragment.onCreateAnimator(transit, enter, 617 fragment.mNextAnim); 618 if (animObj != null) { 619 return animObj; 620 } 621 622 if (fragment.mNextAnim != 0) { 623 Animator anim = AnimatorInflater.loadAnimator(mActivity, fragment.mNextAnim); 624 if (anim != null) { 625 return anim; 626 } 627 } 628 629 if (transit == 0) { 630 return null; 631 } 632 633 int styleIndex = transitToStyleIndex(transit, enter); 634 if (styleIndex < 0) { 635 return null; 636 } 637 638 if (transitionStyle == 0 && mActivity.getWindow() != null) { 639 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 640 } 641 if (transitionStyle == 0) { 642 return null; 643 } 644 645 TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 646 com.android.internal.R.styleable.FragmentAnimation); 647 int anim = attrs.getResourceId(styleIndex, 0); 648 attrs.recycle(); 649 650 if (anim == 0) { 651 return null; 652 } 653 654 return AnimatorInflater.loadAnimator(mActivity, anim); 655 } 656 657 void moveToState(Fragment f, int newState, int transit, int transitionStyle) { 658 // Fragments that are not currently added will sit in the onCreate() state. 659 if (!f.mAdded && newState > Fragment.CREATED) { 660 newState = Fragment.CREATED; 661 } 662 663 if (f.mState < newState) { 664 if (f.mAnimatingAway != null) { 665 // The fragment is currently being animated... but! Now we 666 // want to move our state back up. Give up on waiting for the 667 // animation, move to whatever the final state should be once 668 // the animation is done, and then we can proceed from there. 669 f.mAnimatingAway = null; 670 moveToState(f, f.mStateAfterAnimating, 0, 0); 671 } 672 switch (f.mState) { 673 case Fragment.INITIALIZING: 674 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 675 if (f.mSavedFragmentState != null) { 676 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 677 FragmentManagerImpl.VIEW_STATE_TAG); 678 f.mTarget = getFragment(f.mSavedFragmentState, 679 FragmentManagerImpl.TARGET_STATE_TAG); 680 if (f.mTarget != null) { 681 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 682 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 683 } 684 } 685 f.mActivity = mActivity; 686 f.mFragmentManager = mActivity.mFragments; 687 f.mCalled = false; 688 f.onAttach(mActivity); 689 if (!f.mCalled) { 690 throw new SuperNotCalledException("Fragment " + f 691 + " did not call through to super.onAttach()"); 692 } 693 mActivity.onAttachFragment(f); 694 695 if (!f.mRetaining) { 696 f.mCalled = false; 697 f.onCreate(f.mSavedFragmentState); 698 if (!f.mCalled) { 699 throw new SuperNotCalledException("Fragment " + f 700 + " did not call through to super.onCreate()"); 701 } 702 } 703 f.mRetaining = false; 704 if (f.mFromLayout) { 705 // For fragments that are part of the content view 706 // layout, we need to instantiate the view immediately 707 // and the inflater will take care of adding it. 708 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 709 null, f.mSavedFragmentState); 710 if (f.mView != null) { 711 f.mView.setSaveFromParentEnabled(false); 712 f.restoreViewState(); 713 if (f.mHidden) f.mView.setVisibility(View.GONE); 714 } 715 } 716 case Fragment.CREATED: 717 if (newState > Fragment.CREATED) { 718 if (DEBUG) Log.v(TAG, "moveto CONTENT: " + f); 719 if (!f.mFromLayout) { 720 ViewGroup container = null; 721 if (f.mContainerId != 0) { 722 container = (ViewGroup)mActivity.findViewById(f.mContainerId); 723 if (container == null && !f.mRestored) { 724 throw new IllegalArgumentException("No view found for id 0x" 725 + Integer.toHexString(f.mContainerId) 726 + " for fragment " + f); 727 } 728 } 729 f.mContainer = container; 730 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 731 container, f.mSavedFragmentState); 732 if (f.mView != null) { 733 f.mView.setSaveFromParentEnabled(false); 734 if (container != null) { 735 Animator anim = loadAnimator(f, transit, true, 736 transitionStyle); 737 if (anim != null) { 738 anim.setTarget(f.mView); 739 anim.start(); 740 } 741 container.addView(f.mView); 742 f.restoreViewState(); 743 } 744 if (f.mHidden) f.mView.setVisibility(View.GONE); 745 } 746 } 747 748 f.mCalled = false; 749 f.onActivityCreated(f.mSavedFragmentState); 750 if (!f.mCalled) { 751 throw new SuperNotCalledException("Fragment " + f 752 + " did not call through to super.onActivityCreated()"); 753 } 754 f.mSavedFragmentState = null; 755 } 756 case Fragment.ACTIVITY_CREATED: 757 if (newState > Fragment.ACTIVITY_CREATED) { 758 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 759 f.mCalled = false; 760 f.onStart(); 761 if (!f.mCalled) { 762 throw new SuperNotCalledException("Fragment " + f 763 + " did not call through to super.onStart()"); 764 } 765 } 766 case Fragment.STARTED: 767 if (newState > Fragment.STARTED) { 768 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 769 f.mCalled = false; 770 f.mResumed = true; 771 f.onResume(); 772 if (!f.mCalled) { 773 throw new SuperNotCalledException("Fragment " + f 774 + " did not call through to super.onResume()"); 775 } 776 } 777 } 778 } else if (f.mState > newState) { 779 switch (f.mState) { 780 case Fragment.RESUMED: 781 if (newState < Fragment.RESUMED) { 782 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 783 f.mCalled = false; 784 f.onPause(); 785 if (!f.mCalled) { 786 throw new SuperNotCalledException("Fragment " + f 787 + " did not call through to super.onPause()"); 788 } 789 f.mResumed = false; 790 } 791 case Fragment.STARTED: 792 if (newState < Fragment.STARTED) { 793 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 794 f.mCalled = false; 795 f.performStop(); 796 if (!f.mCalled) { 797 throw new SuperNotCalledException("Fragment " + f 798 + " did not call through to super.onStop()"); 799 } 800 } 801 case Fragment.ACTIVITY_CREATED: 802 if (newState < Fragment.ACTIVITY_CREATED) { 803 if (DEBUG) Log.v(TAG, "movefrom CONTENT: " + f); 804 if (f.mView != null) { 805 // Need to save the current view state if not 806 // done already. 807 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 808 saveFragmentViewState(f); 809 } 810 } 811 f.mCalled = false; 812 f.onDestroyView(); 813 if (!f.mCalled) { 814 throw new SuperNotCalledException("Fragment " + f 815 + " did not call through to super.onDestroyView()"); 816 } 817 if (f.mView != null && f.mContainer != null) { 818 Animator anim = null; 819 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 820 anim = loadAnimator(f, transit, false, 821 transitionStyle); 822 } 823 if (anim != null) { 824 final ViewGroup container = f.mContainer; 825 final View view = f.mView; 826 final Fragment fragment = f; 827 container.startViewTransition(view); 828 f.mAnimatingAway = anim; 829 f.mStateAfterAnimating = newState; 830 anim.addListener(new AnimatorListenerAdapter() { 831 @Override 832 public void onAnimationEnd(Animator anim) { 833 container.endViewTransition(view); 834 if (fragment.mAnimatingAway != null) { 835 fragment.mAnimatingAway = null; 836 moveToState(fragment, fragment.mStateAfterAnimating, 837 0, 0); 838 } 839 } 840 }); 841 anim.setTarget(f.mView); 842 anim.start(); 843 844 } 845 f.mContainer.removeView(f.mView); 846 } 847 f.mContainer = null; 848 f.mView = null; 849 } 850 case Fragment.CREATED: 851 if (newState < Fragment.CREATED) { 852 if (mDestroyed) { 853 if (f.mAnimatingAway != null) { 854 // The fragment's containing activity is 855 // being destroyed, but this fragment is 856 // currently animating away. Stop the 857 // animation right now -- it is not needed, 858 // and we can't wait any more on destroying 859 // the fragment. 860 Animator anim = f.mAnimatingAway; 861 f.mAnimatingAway = null; 862 anim.cancel(); 863 } 864 } 865 if (f.mAnimatingAway != null) { 866 // We are waiting for the fragment's view to finish 867 // animating away. Just make a note of the state 868 // the fragment now should move to once the animation 869 // is done. 870 f.mStateAfterAnimating = newState; 871 } else { 872 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 873 if (!f.mRetaining) { 874 f.mCalled = false; 875 f.onDestroy(); 876 if (!f.mCalled) { 877 throw new SuperNotCalledException("Fragment " + f 878 + " did not call through to super.onDestroy()"); 879 } 880 } 881 882 f.mCalled = false; 883 f.onDetach(); 884 if (!f.mCalled) { 885 throw new SuperNotCalledException("Fragment " + f 886 + " did not call through to super.onDetach()"); 887 } 888 f.mImmediateActivity = null; 889 f.mActivity = null; 890 f.mFragmentManager = null; 891 } 892 } 893 } 894 } 895 896 f.mState = newState; 897 } 898 899 void moveToState(Fragment f) { 900 moveToState(f, mCurState, 0, 0); 901 } 902 903 void moveToState(int newState, boolean always) { 904 moveToState(newState, 0, 0, always); 905 } 906 907 void moveToState(int newState, int transit, int transitStyle, boolean always) { 908 if (mActivity == null && newState != Fragment.INITIALIZING) { 909 throw new IllegalStateException("No activity"); 910 } 911 912 if (!always && mCurState == newState) { 913 return; 914 } 915 916 mCurState = newState; 917 if (mActive != null) { 918 for (int i=0; i<mActive.size(); i++) { 919 Fragment f = mActive.get(i); 920 if (f != null) { 921 moveToState(f, newState, transit, transitStyle); 922 } 923 } 924 925 if (mNeedMenuInvalidate && mActivity != null) { 926 mActivity.invalidateOptionsMenu(); 927 mNeedMenuInvalidate = false; 928 } 929 } 930 } 931 932 void makeActive(Fragment f) { 933 if (f.mIndex >= 0) { 934 return; 935 } 936 937 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 938 if (mActive == null) { 939 mActive = new ArrayList<Fragment>(); 940 } 941 f.setIndex(mActive.size()); 942 mActive.add(f); 943 944 } else { 945 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1)); 946 mActive.set(f.mIndex, f); 947 } 948 } 949 950 void makeInactive(Fragment f) { 951 if (f.mIndex < 0) { 952 return; 953 } 954 955 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f.mIndex); 956 mActive.set(f.mIndex, null); 957 if (mAvailIndices == null) { 958 mAvailIndices = new ArrayList<Integer>(); 959 } 960 mAvailIndices.add(f.mIndex); 961 mActivity.invalidateFragmentIndex(f.mIndex); 962 f.clearIndex(); 963 } 964 965 public void addFragment(Fragment fragment, boolean moveToStateNow) { 966 if (mAdded == null) { 967 mAdded = new ArrayList<Fragment>(); 968 } 969 mAdded.add(fragment); 970 makeActive(fragment); 971 if (DEBUG) Log.v(TAG, "add: " + fragment); 972 fragment.mAdded = true; 973 fragment.mRemoving = false; 974 if (fragment.mHasMenu) { 975 mNeedMenuInvalidate = true; 976 } 977 if (moveToStateNow) { 978 moveToState(fragment); 979 } 980 } 981 982 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 983 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 984 mAdded.remove(fragment); 985 final boolean inactive = fragment.mBackStackNesting <= 0; 986 if (fragment.mHasMenu) { 987 mNeedMenuInvalidate = true; 988 } 989 fragment.mAdded = false; 990 fragment.mRemoving = true; 991 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 992 transition, transitionStyle); 993 if (inactive) { 994 makeInactive(fragment); 995 } 996 } 997 998 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 999 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1000 if (!fragment.mHidden) { 1001 fragment.mHidden = true; 1002 if (fragment.mView != null) { 1003 Animator anim = loadAnimator(fragment, transition, true, 1004 transitionStyle); 1005 if (anim != null) { 1006 anim.setTarget(fragment.mView); 1007 // Delay the actual hide operation until the animation finishes, otherwise 1008 // the fragment will just immediately disappear 1009 final Fragment finalFragment = fragment; 1010 anim.addListener(new AnimatorListenerAdapter() { 1011 @Override 1012 public void onAnimationEnd(Animator animation) { 1013 if (finalFragment.mView != null) { 1014 finalFragment.mView.setVisibility(View.GONE); 1015 } 1016 } 1017 }); 1018 anim.start(); 1019 } else { 1020 fragment.mView.setVisibility(View.GONE); 1021 } 1022 } 1023 if (fragment.mAdded && fragment.mHasMenu) { 1024 mNeedMenuInvalidate = true; 1025 } 1026 fragment.onHiddenChanged(true); 1027 } 1028 } 1029 1030 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1031 if (DEBUG) Log.v(TAG, "show: " + fragment); 1032 if (fragment.mHidden) { 1033 fragment.mHidden = false; 1034 if (fragment.mView != null) { 1035 Animator anim = loadAnimator(fragment, transition, true, 1036 transitionStyle); 1037 if (anim != null) { 1038 anim.setTarget(fragment.mView); 1039 anim.start(); 1040 } 1041 fragment.mView.setVisibility(View.VISIBLE); 1042 } 1043 if (fragment.mAdded && fragment.mHasMenu) { 1044 mNeedMenuInvalidate = true; 1045 } 1046 fragment.onHiddenChanged(false); 1047 } 1048 } 1049 1050 public Fragment findFragmentById(int id) { 1051 if (mActive != null) { 1052 // First look through added fragments. 1053 for (int i=mAdded.size()-1; i>=0; i--) { 1054 Fragment f = mAdded.get(i); 1055 if (f != null && f.mFragmentId == id) { 1056 return f; 1057 } 1058 } 1059 // Now for any known fragment. 1060 for (int i=mActive.size()-1; i>=0; i--) { 1061 Fragment f = mActive.get(i); 1062 if (f != null && f.mFragmentId == id) { 1063 return f; 1064 } 1065 } 1066 } 1067 return null; 1068 } 1069 1070 public Fragment findFragmentByTag(String tag) { 1071 if (mActive != null && tag != null) { 1072 // First look through added fragments. 1073 for (int i=mAdded.size()-1; i>=0; i--) { 1074 Fragment f = mAdded.get(i); 1075 if (f != null && tag.equals(f.mTag)) { 1076 return f; 1077 } 1078 } 1079 // Now for any known fragment. 1080 for (int i=mActive.size()-1; i>=0; i--) { 1081 Fragment f = mActive.get(i); 1082 if (f != null && tag.equals(f.mTag)) { 1083 return f; 1084 } 1085 } 1086 } 1087 return null; 1088 } 1089 1090 public Fragment findFragmentByWho(String who) { 1091 if (mActive != null && who != null) { 1092 for (int i=mActive.size()-1; i>=0; i--) { 1093 Fragment f = mActive.get(i); 1094 if (f != null && who.equals(f.mWho)) { 1095 return f; 1096 } 1097 } 1098 } 1099 return null; 1100 } 1101 1102 private void checkStateLoss() { 1103 if (mStateSaved) { 1104 throw new IllegalStateException( 1105 "Can not perform this action after onSaveInstanceState"); 1106 } 1107 if (mNoTransactionsBecause != null) { 1108 throw new IllegalStateException( 1109 "Can not perform this action inside of " + mNoTransactionsBecause); 1110 } 1111 } 1112 1113 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1114 if (!allowStateLoss) { 1115 checkStateLoss(); 1116 } 1117 synchronized (this) { 1118 if (mActivity == null) { 1119 throw new IllegalStateException("Activity has been destroyed"); 1120 } 1121 if (mPendingActions == null) { 1122 mPendingActions = new ArrayList<Runnable>(); 1123 } 1124 mPendingActions.add(action); 1125 if (mPendingActions.size() == 1) { 1126 mActivity.mHandler.removeCallbacks(mExecCommit); 1127 mActivity.mHandler.post(mExecCommit); 1128 } 1129 } 1130 } 1131 1132 public int allocBackStackIndex(BackStackRecord bse) { 1133 synchronized (this) { 1134 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1135 if (mBackStackIndices == null) { 1136 mBackStackIndices = new ArrayList<BackStackRecord>(); 1137 } 1138 int index = mBackStackIndices.size(); 1139 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1140 mBackStackIndices.add(bse); 1141 return index; 1142 1143 } else { 1144 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1145 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1146 mBackStackIndices.set(index, bse); 1147 return index; 1148 } 1149 } 1150 } 1151 1152 public void setBackStackIndex(int index, BackStackRecord bse) { 1153 synchronized (this) { 1154 if (mBackStackIndices == null) { 1155 mBackStackIndices = new ArrayList<BackStackRecord>(); 1156 } 1157 int N = mBackStackIndices.size(); 1158 if (index < N) { 1159 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1160 mBackStackIndices.set(index, bse); 1161 } else { 1162 while (N < index) { 1163 mBackStackIndices.add(null); 1164 if (mAvailBackStackIndices == null) { 1165 mAvailBackStackIndices = new ArrayList<Integer>(); 1166 } 1167 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1168 mAvailBackStackIndices.add(N); 1169 N++; 1170 } 1171 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1172 mBackStackIndices.add(bse); 1173 } 1174 } 1175 } 1176 1177 public void freeBackStackIndex(int index) { 1178 synchronized (this) { 1179 mBackStackIndices.set(index, null); 1180 if (mAvailBackStackIndices == null) { 1181 mAvailBackStackIndices = new ArrayList<Integer>(); 1182 } 1183 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1184 mAvailBackStackIndices.add(index); 1185 } 1186 } 1187 1188 /** 1189 * Only call from main thread! 1190 */ 1191 public boolean execPendingActions() { 1192 if (mExecutingActions) { 1193 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1194 } 1195 1196 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1197 throw new IllegalStateException("Must be called from main thread of process"); 1198 } 1199 1200 boolean didSomething = false; 1201 1202 while (true) { 1203 int numActions; 1204 1205 synchronized (this) { 1206 if (mPendingActions == null || mPendingActions.size() == 0) { 1207 return didSomething; 1208 } 1209 1210 numActions = mPendingActions.size(); 1211 if (mTmpActions == null || mTmpActions.length < numActions) { 1212 mTmpActions = new Runnable[numActions]; 1213 } 1214 mPendingActions.toArray(mTmpActions); 1215 mPendingActions.clear(); 1216 mActivity.mHandler.removeCallbacks(mExecCommit); 1217 } 1218 1219 mExecutingActions = true; 1220 for (int i=0; i<numActions; i++) { 1221 mTmpActions[i].run(); 1222 } 1223 mExecutingActions = false; 1224 didSomething = true; 1225 } 1226 } 1227 1228 void reportBackStackChanged() { 1229 if (mBackStackChangeListeners != null) { 1230 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1231 mBackStackChangeListeners.get(i).onBackStackChanged(); 1232 } 1233 } 1234 } 1235 1236 void addBackStackState(BackStackRecord state) { 1237 if (mBackStack == null) { 1238 mBackStack = new ArrayList<BackStackRecord>(); 1239 } 1240 mBackStack.add(state); 1241 reportBackStackChanged(); 1242 } 1243 1244 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1245 if (mBackStack == null) { 1246 return false; 1247 } 1248 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1249 int last = mBackStack.size()-1; 1250 if (last < 0) { 1251 return false; 1252 } 1253 final BackStackRecord bss = mBackStack.remove(last); 1254 bss.popFromBackStack(true); 1255 reportBackStackChanged(); 1256 } else { 1257 int index = -1; 1258 if (name != null || id >= 0) { 1259 // If a name or ID is specified, look for that place in 1260 // the stack. 1261 index = mBackStack.size()-1; 1262 while (index >= 0) { 1263 BackStackRecord bss = mBackStack.get(index); 1264 if (name != null && name.equals(bss.getName())) { 1265 break; 1266 } 1267 if (id >= 0 && id == bss.mIndex) { 1268 break; 1269 } 1270 index--; 1271 } 1272 if (index < 0) { 1273 return false; 1274 } 1275 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1276 index--; 1277 // Consume all following entries that match. 1278 while (index >= 0) { 1279 BackStackRecord bss = mBackStack.get(index); 1280 if ((name != null && name.equals(bss.getName())) 1281 || (id >= 0 && id == bss.mIndex)) { 1282 index--; 1283 continue; 1284 } 1285 break; 1286 } 1287 } 1288 } 1289 if (index == mBackStack.size()-1) { 1290 return false; 1291 } 1292 final ArrayList<BackStackRecord> states 1293 = new ArrayList<BackStackRecord>(); 1294 for (int i=mBackStack.size()-1; i>index; i--) { 1295 states.add(mBackStack.remove(i)); 1296 } 1297 final int LAST = states.size()-1; 1298 for (int i=0; i<=LAST; i++) { 1299 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1300 states.get(i).popFromBackStack(i == LAST); 1301 } 1302 reportBackStackChanged(); 1303 } 1304 return true; 1305 } 1306 1307 ArrayList<Fragment> retainNonConfig() { 1308 ArrayList<Fragment> fragments = null; 1309 if (mActive != null) { 1310 for (int i=0; i<mActive.size(); i++) { 1311 Fragment f = mActive.get(i); 1312 if (f != null && f.mRetainInstance) { 1313 if (fragments == null) { 1314 fragments = new ArrayList<Fragment>(); 1315 } 1316 fragments.add(f); 1317 f.mRetaining = true; 1318 } 1319 } 1320 } 1321 return fragments; 1322 } 1323 1324 void saveFragmentViewState(Fragment f) { 1325 if (f.mView == null) { 1326 return; 1327 } 1328 if (mStateArray == null) { 1329 mStateArray = new SparseArray<Parcelable>(); 1330 } 1331 f.mView.saveHierarchyState(mStateArray); 1332 if (mStateArray.size() > 0) { 1333 f.mSavedViewState = mStateArray; 1334 mStateArray = null; 1335 } 1336 } 1337 1338 Parcelable saveAllState() { 1339 // Make sure all pending operations have now been executed to get 1340 // our state update-to-date. 1341 execPendingActions(); 1342 1343 mStateSaved = true; 1344 1345 if (mActive == null || mActive.size() <= 0) { 1346 return null; 1347 } 1348 1349 // First collect all active fragments. 1350 int N = mActive.size(); 1351 FragmentState[] active = new FragmentState[N]; 1352 boolean haveFragments = false; 1353 for (int i=0; i<N; i++) { 1354 Fragment f = mActive.get(i); 1355 if (f != null) { 1356 haveFragments = true; 1357 1358 FragmentState fs = new FragmentState(f); 1359 active[i] = fs; 1360 1361 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1362 if (mStateBundle == null) { 1363 mStateBundle = new Bundle(); 1364 } 1365 f.onSaveInstanceState(mStateBundle); 1366 if (!mStateBundle.isEmpty()) { 1367 fs.mSavedFragmentState = mStateBundle; 1368 mStateBundle = null; 1369 } 1370 1371 if (f.mView != null) { 1372 saveFragmentViewState(f); 1373 if (f.mSavedViewState != null) { 1374 if (fs.mSavedFragmentState == null) { 1375 fs.mSavedFragmentState = new Bundle(); 1376 } 1377 fs.mSavedFragmentState.putSparseParcelableArray( 1378 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1379 } 1380 } 1381 1382 if (f.mTarget != null) { 1383 if (f.mTarget.mIndex < 0) { 1384 String msg = "Failure saving state: " + f 1385 + " has target not in fragment manager: " + f.mTarget; 1386 Slog.e(TAG, msg); 1387 dump(" ", null, new PrintWriter(new LogWriter( 1388 Log.ERROR, TAG, Log.LOG_ID_SYSTEM)), new String[] { }); 1389 throw new IllegalStateException(msg); 1390 } 1391 if (fs.mSavedFragmentState == null) { 1392 fs.mSavedFragmentState = new Bundle(); 1393 } 1394 putFragment(fs.mSavedFragmentState, 1395 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1396 if (f.mTargetRequestCode != 0) { 1397 fs.mSavedFragmentState.putInt( 1398 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1399 f.mTargetRequestCode); 1400 } 1401 } 1402 1403 } else { 1404 fs.mSavedFragmentState = f.mSavedFragmentState; 1405 } 1406 1407 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1408 + fs.mSavedFragmentState); 1409 } 1410 } 1411 1412 if (!haveFragments) { 1413 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1414 return null; 1415 } 1416 1417 int[] added = null; 1418 BackStackState[] backStack = null; 1419 1420 // Build list of currently added fragments. 1421 if (mAdded != null) { 1422 N = mAdded.size(); 1423 if (N > 0) { 1424 added = new int[N]; 1425 for (int i=0; i<N; i++) { 1426 added[i] = mAdded.get(i).mIndex; 1427 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1428 + ": " + mAdded.get(i)); 1429 } 1430 } 1431 } 1432 1433 // Now save back stack. 1434 if (mBackStack != null) { 1435 N = mBackStack.size(); 1436 if (N > 0) { 1437 backStack = new BackStackState[N]; 1438 for (int i=0; i<N; i++) { 1439 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1440 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1441 + ": " + mBackStack.get(i)); 1442 } 1443 } 1444 } 1445 1446 FragmentManagerState fms = new FragmentManagerState(); 1447 fms.mActive = active; 1448 fms.mAdded = added; 1449 fms.mBackStack = backStack; 1450 return fms; 1451 } 1452 1453 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1454 // If there is no saved state at all, then there can not be 1455 // any nonConfig fragments either, so that is that. 1456 if (state == null) return; 1457 FragmentManagerState fms = (FragmentManagerState)state; 1458 if (fms.mActive == null) return; 1459 1460 // First re-attach any non-config instances we are retaining back 1461 // to their saved state, so we don't try to instantiate them again. 1462 if (nonConfig != null) { 1463 for (int i=0; i<nonConfig.size(); i++) { 1464 Fragment f = nonConfig.get(i); 1465 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1466 FragmentState fs = fms.mActive[f.mIndex]; 1467 fs.mInstance = f; 1468 f.mSavedViewState = null; 1469 f.mBackStackNesting = 0; 1470 f.mInLayout = false; 1471 f.mAdded = false; 1472 if (fs.mSavedFragmentState != null) { 1473 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1474 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1475 FragmentManagerImpl.VIEW_STATE_TAG); 1476 } 1477 } 1478 } 1479 1480 // Build the full list of active fragments, instantiating them from 1481 // their saved state. 1482 mActive = new ArrayList<Fragment>(fms.mActive.length); 1483 if (mAvailIndices != null) { 1484 mAvailIndices.clear(); 1485 } 1486 for (int i=0; i<fms.mActive.length; i++) { 1487 FragmentState fs = fms.mActive[i]; 1488 if (fs != null) { 1489 Fragment f = fs.instantiate(mActivity); 1490 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1491 mActive.add(f); 1492 // Now that the fragment is instantiated (or came from being 1493 // retained above), clear mInstance in case we end up re-restoring 1494 // from this FragmentState again. 1495 fs.mInstance = null; 1496 } else { 1497 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1498 mActive.add(null); 1499 if (mAvailIndices == null) { 1500 mAvailIndices = new ArrayList<Integer>(); 1501 } 1502 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1503 mAvailIndices.add(i); 1504 } 1505 } 1506 1507 // Update the target of all retained fragments. 1508 if (nonConfig != null) { 1509 for (int i=0; i<nonConfig.size(); i++) { 1510 Fragment f = nonConfig.get(i); 1511 if (f.mTarget != null) { 1512 if (f.mTarget.mIndex < mActive.size()) { 1513 f.mTarget = mActive.get(f.mTarget.mIndex); 1514 } else { 1515 Log.w(TAG, "Re-attaching retained fragment " + f 1516 + " target no longer exists: " + f.mTarget); 1517 f.mTarget = null; 1518 } 1519 } 1520 } 1521 } 1522 1523 // Build the list of currently added fragments. 1524 if (fms.mAdded != null) { 1525 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1526 for (int i=0; i<fms.mAdded.length; i++) { 1527 Fragment f = mActive.get(fms.mAdded[i]); 1528 if (f == null) { 1529 throw new IllegalStateException( 1530 "No instantiated fragment for index #" + fms.mAdded[i]); 1531 } 1532 f.mAdded = true; 1533 f.mImmediateActivity = mActivity; 1534 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1535 mAdded.add(f); 1536 } 1537 } else { 1538 mAdded = null; 1539 } 1540 1541 // Build the back stack. 1542 if (fms.mBackStack != null) { 1543 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1544 for (int i=0; i<fms.mBackStack.length; i++) { 1545 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1546 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1547 + " (index " + bse.mIndex + "): " + bse); 1548 mBackStack.add(bse); 1549 if (bse.mIndex >= 0) { 1550 setBackStackIndex(bse.mIndex, bse); 1551 } 1552 } 1553 } else { 1554 mBackStack = null; 1555 } 1556 } 1557 1558 public void attachActivity(Activity activity) { 1559 if (mActivity != null) throw new IllegalStateException(); 1560 mActivity = activity; 1561 } 1562 1563 public void noteStateNotSaved() { 1564 mStateSaved = false; 1565 } 1566 1567 public void dispatchCreate() { 1568 mStateSaved = false; 1569 moveToState(Fragment.CREATED, false); 1570 } 1571 1572 public void dispatchActivityCreated() { 1573 mStateSaved = false; 1574 moveToState(Fragment.ACTIVITY_CREATED, false); 1575 } 1576 1577 public void dispatchStart() { 1578 mStateSaved = false; 1579 moveToState(Fragment.STARTED, false); 1580 } 1581 1582 public void dispatchResume() { 1583 mStateSaved = false; 1584 moveToState(Fragment.RESUMED, false); 1585 } 1586 1587 public void dispatchPause() { 1588 moveToState(Fragment.STARTED, false); 1589 } 1590 1591 public void dispatchStop() { 1592 moveToState(Fragment.ACTIVITY_CREATED, false); 1593 } 1594 1595 public void dispatchDestroy() { 1596 mDestroyed = true; 1597 moveToState(Fragment.INITIALIZING, false); 1598 mActivity = null; 1599 } 1600 1601 public void dispatchConfigurationChanged(Configuration newConfig) { 1602 if (mActive != null) { 1603 for (int i=0; i<mAdded.size(); i++) { 1604 Fragment f = mAdded.get(i); 1605 if (f != null) { 1606 f.onConfigurationChanged(newConfig); 1607 } 1608 } 1609 } 1610 } 1611 1612 public void dispatchLowMemory() { 1613 if (mActive != null) { 1614 for (int i=0; i<mAdded.size(); i++) { 1615 Fragment f = mAdded.get(i); 1616 if (f != null) { 1617 f.onLowMemory(); 1618 } 1619 } 1620 } 1621 } 1622 1623 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1624 boolean show = false; 1625 ArrayList<Fragment> newMenus = null; 1626 if (mActive != null) { 1627 for (int i=0; i<mAdded.size(); i++) { 1628 Fragment f = mAdded.get(i); 1629 if (f != null && !f.mHidden && f.mHasMenu) { 1630 show = true; 1631 f.onCreateOptionsMenu(menu, inflater); 1632 if (newMenus == null) { 1633 newMenus = new ArrayList<Fragment>(); 1634 } 1635 newMenus.add(f); 1636 } 1637 } 1638 } 1639 1640 if (mCreatedMenus != null) { 1641 for (int i=0; i<mCreatedMenus.size(); i++) { 1642 Fragment f = mCreatedMenus.get(i); 1643 if (newMenus == null || !newMenus.contains(f)) { 1644 f.onDestroyOptionsMenu(); 1645 } 1646 } 1647 } 1648 1649 mCreatedMenus = newMenus; 1650 1651 return show; 1652 } 1653 1654 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1655 boolean show = false; 1656 if (mActive != null) { 1657 for (int i=0; i<mAdded.size(); i++) { 1658 Fragment f = mAdded.get(i); 1659 if (f != null && !f.mHidden && f.mHasMenu) { 1660 show = true; 1661 f.onPrepareOptionsMenu(menu); 1662 } 1663 } 1664 } 1665 return show; 1666 } 1667 1668 public boolean dispatchOptionsItemSelected(MenuItem item) { 1669 if (mActive != null) { 1670 for (int i=0; i<mAdded.size(); i++) { 1671 Fragment f = mAdded.get(i); 1672 if (f != null && !f.mHidden && f.mHasMenu) { 1673 if (f.onOptionsItemSelected(item)) { 1674 return true; 1675 } 1676 } 1677 } 1678 } 1679 return false; 1680 } 1681 1682 public boolean dispatchContextItemSelected(MenuItem item) { 1683 if (mActive != null) { 1684 for (int i=0; i<mAdded.size(); i++) { 1685 Fragment f = mAdded.get(i); 1686 if (f != null && !f.mHidden) { 1687 if (f.onContextItemSelected(item)) { 1688 return true; 1689 } 1690 } 1691 } 1692 } 1693 return false; 1694 } 1695 1696 public void dispatchOptionsMenuClosed(Menu menu) { 1697 if (mActive != null) { 1698 for (int i=0; i<mAdded.size(); i++) { 1699 Fragment f = mAdded.get(i); 1700 if (f != null && !f.mHidden && f.mHasMenu) { 1701 f.onOptionsMenuClosed(menu); 1702 } 1703 } 1704 } 1705 } 1706 1707 public static int reverseTransit(int transit) { 1708 int rev = 0; 1709 switch (transit) { 1710 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1711 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1712 break; 1713 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1714 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1715 break; 1716 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1717 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 1718 break; 1719 } 1720 return rev; 1721 1722 } 1723 1724 public static int transitToStyleIndex(int transit, boolean enter) { 1725 int animAttr = -1; 1726 switch (transit) { 1727 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1728 animAttr = enter 1729 ? com.android.internal.R.styleable.FragmentAnimation_fragmentOpenEnterAnimation 1730 : com.android.internal.R.styleable.FragmentAnimation_fragmentOpenExitAnimation; 1731 break; 1732 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1733 animAttr = enter 1734 ? com.android.internal.R.styleable.FragmentAnimation_fragmentCloseEnterAnimation 1735 : com.android.internal.R.styleable.FragmentAnimation_fragmentCloseExitAnimation; 1736 break; 1737 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1738 animAttr = enter 1739 ? com.android.internal.R.styleable.FragmentAnimation_fragmentFadeEnterAnimation 1740 : com.android.internal.R.styleable.FragmentAnimation_fragmentFadeExitAnimation; 1741 break; 1742 } 1743 return animAttr; 1744 } 1745} 1746