FragmentManager.java revision ea2c91b0198855073983b4a8437aa71cbd83872f
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.support.v4.app; 18 19import android.R; 20import android.content.Context; 21import android.content.res.Configuration; 22import android.os.Bundle; 23import android.os.Handler; 24import android.os.Looper; 25import android.os.Parcel; 26import android.os.Parcelable; 27import android.support.v4.util.DebugUtils; 28import android.support.v4.util.LogWriter; 29import android.util.Log; 30import android.util.SparseArray; 31import android.view.animation.AccelerateInterpolator; 32import android.view.animation.AlphaAnimation; 33import android.view.animation.Animation; 34import android.view.animation.AnimationSet; 35import android.view.animation.AnimationUtils; 36import android.view.animation.DecelerateInterpolator; 37import android.view.animation.Interpolator; 38import android.view.animation.ScaleAnimation; 39import android.view.animation.Animation.AnimationListener; 40import android.view.Menu; 41import android.view.MenuInflater; 42import android.view.MenuItem; 43import android.view.View; 44import android.view.ViewGroup; 45 46import java.io.FileDescriptor; 47import java.io.PrintWriter; 48import java.util.ArrayList; 49import java.util.Arrays; 50 51/** 52 * Static library support version of the framework's {@link android.app.FragmentManager}. 53 * Used to write apps that run on platforms prior to Android 3.0. When running 54 * on Android 3.0 or above, this implementation is still used; it does not try 55 * to switch to the framework's implementation. See the framework SDK 56 * documentation for a class overview. 57 * 58 * <p>Your activity must derive from {@link FragmentActivity} to use this. 59 */ 60public abstract class FragmentManager { 61 /** 62 * Representation of an entry on the fragment back stack, as created 63 * with {@link FragmentTransaction#addToBackStack(String) 64 * FragmentTransaction.addToBackStack()}. Entries can later be 65 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 66 * FragmentManager.getBackStackEntry()}. 67 * 68 * <p>Note that you should never hold on to a BackStackEntry object; 69 * the identifier as returned by {@link #getId} is the only thing that 70 * will be persisted across activity instances. 71 */ 72 public interface BackStackEntry { 73 /** 74 * Return the unique identifier for the entry. This is the only 75 * representation of the entry that will persist across activity 76 * instances. 77 */ 78 public int getId(); 79 80 /** 81 * Return the full bread crumb title resource identifier for the entry, 82 * or 0 if it does not have one. 83 */ 84 public int getBreadCrumbTitleRes(); 85 86 /** 87 * Return the short bread crumb title resource identifier for the entry, 88 * or 0 if it does not have one. 89 */ 90 public int getBreadCrumbShortTitleRes(); 91 92 /** 93 * Return the full bread crumb title for the entry, or null if it 94 * does not have one. 95 */ 96 public CharSequence getBreadCrumbTitle(); 97 98 /** 99 * Return the short bread crumb title for the entry, or null if it 100 * does not have one. 101 */ 102 public CharSequence getBreadCrumbShortTitle(); 103 } 104 105 /** 106 * Interface to watch for changes to the back stack. 107 */ 108 public interface OnBackStackChangedListener { 109 /** 110 * Called whenever the contents of the back stack change. 111 */ 112 public void onBackStackChanged(); 113 } 114 115 /** 116 * Start a series of edit operations on the Fragments associated with 117 * this FragmentManager. 118 * 119 * <p>Note: A fragment transaction can only be created/committed prior 120 * to an activity saving its state. If you try to commit a transaction 121 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 122 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 123 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 124 * This is because the framework takes care of saving your current fragments 125 * in the state, and if changes are made after the state is saved then they 126 * will be lost.</p> 127 */ 128 public abstract FragmentTransaction beginTransaction(); 129 130 /** @hide -- remove once prebuilts are in. */ 131 @Deprecated 132 public FragmentTransaction openTransaction() { 133 return beginTransaction(); 134 } 135 136 /** 137 * After a {@link FragmentTransaction} is committed with 138 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 139 * is scheduled to be executed asynchronously on the process's main thread. 140 * If you want to immediately executing any such pending operations, you 141 * can call this function (only from the main thread) to do so. Note that 142 * all callbacks and other related behavior will be done from within this 143 * call, so be careful about where this is called from. 144 * 145 * @return Returns true if there were any pending transactions to be 146 * executed. 147 */ 148 public abstract boolean executePendingTransactions(); 149 150 /** 151 * Finds a fragment that was identified by the given id either when inflated 152 * from XML or as the container ID when added in a transaction. This first 153 * searches through fragments that are currently added to the manager's 154 * activity; if no such fragment is found, then all fragments currently 155 * on the back stack associated with this ID are searched. 156 * @return The fragment if found or null otherwise. 157 */ 158 public abstract Fragment findFragmentById(int id); 159 160 /** 161 * Finds a fragment that was identified by the given tag either when inflated 162 * from XML or as supplied when added in a transaction. This first 163 * searches through fragments that are currently added to the manager's 164 * activity; if no such fragment is found, then all fragments currently 165 * on the back stack are searched. 166 * @return The fragment if found or null otherwise. 167 */ 168 public abstract Fragment findFragmentByTag(String tag); 169 170 /** 171 * Flag for {@link #popBackStack(String, int)} 172 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 173 * a back stack entry has been supplied, then all matching entries will 174 * be consumed until one that doesn't match is found or the bottom of 175 * the stack is reached. Otherwise, all entries up to but not including that entry 176 * will be removed. 177 */ 178 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 179 180 /** 181 * Pop the top state off the back stack. Returns true if there was one 182 * to pop, else false. This function is asynchronous -- it enqueues the 183 * request to pop, but the action will not be performed until the application 184 * returns to its event loop. 185 */ 186 public abstract void popBackStack(); 187 188 /** 189 * Like {@link #popBackStack()}, but performs the operation immediately 190 * inside of the call. This is like calling {@link #executePendingTransactions()} 191 * afterwards. 192 * @return Returns true if there was something popped, else false. 193 */ 194 public abstract boolean popBackStackImmediate(); 195 196 /** 197 * Pop the last fragment transition from the manager's fragment 198 * back stack. If there is nothing to pop, false is returned. 199 * This function is asynchronous -- it enqueues the 200 * request to pop, but the action will not be performed until the application 201 * returns to its event loop. 202 * 203 * @param name If non-null, this is the name of a previous back state 204 * to look for; if found, all states up to that state will be popped. The 205 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 206 * the named state itself is popped. If null, only the top state is popped. 207 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 208 */ 209 public abstract void popBackStack(String name, int flags); 210 211 /** 212 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 213 * inside of the call. This is like calling {@link #executePendingTransactions()} 214 * afterwards. 215 * @return Returns true if there was something popped, else false. 216 */ 217 public abstract boolean popBackStackImmediate(String name, int flags); 218 219 /** 220 * Pop all back stack states up to the one with the given identifier. 221 * This function is asynchronous -- it enqueues the 222 * request to pop, but the action will not be performed until the application 223 * returns to its event loop. 224 * 225 * @param id Identifier of the stated to be popped. If no identifier exists, 226 * false is returned. 227 * The identifier is the number returned by 228 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 229 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 230 * the named state itself is popped. 231 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 232 */ 233 public abstract void popBackStack(int id, int flags); 234 235 /** 236 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 237 * inside of the call. This is like calling {@link #executePendingTransactions()} 238 * afterwards. 239 * @return Returns true if there was something popped, else false. 240 */ 241 public abstract boolean popBackStackImmediate(int id, int flags); 242 243 /** 244 * Return the number of entries currently in the back stack. 245 */ 246 public abstract int getBackStackEntryCount(); 247 248 /** 249 * Return the BackStackEntry at index <var>index</var> in the back stack; 250 * entries start index 0 being the bottom of the stack. 251 */ 252 public abstract BackStackEntry getBackStackEntryAt(int index); 253 254 /** 255 * Add a new listener for changes to the fragment back stack. 256 */ 257 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 258 259 /** 260 * Remove a listener that was previously added with 261 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 262 */ 263 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 264 265 /** 266 * Put a reference to a fragment in a Bundle. This Bundle can be 267 * persisted as saved state, and when later restoring 268 * {@link #getFragment(Bundle, String)} will return the current 269 * instance of the same fragment. 270 * 271 * @param bundle The bundle in which to put the fragment reference. 272 * @param key The name of the entry in the bundle. 273 * @param fragment The Fragment whose reference is to be stored. 274 */ 275 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 276 277 /** 278 * Retrieve the current Fragment instance for a reference previously 279 * placed with {@link #putFragment(Bundle, String, Fragment)}. 280 * 281 * @param bundle The bundle from which to retrieve the fragment reference. 282 * @param key The name of the entry in the bundle. 283 * @return Returns the current Fragment instance that is associated with 284 * the given reference. 285 */ 286 public abstract Fragment getFragment(Bundle bundle, String key); 287 288 /** 289 * Print the FragmentManager's state into the given stream. 290 * 291 * @param prefix Text to print at the front of each line. 292 * @param fd The raw file descriptor that the dump is being sent to. 293 * @param writer A PrintWriter to which the dump is to be set. 294 * @param args Additional arguments to the dump request. 295 */ 296 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 297 298 /** 299 * Control whether the framework's internal fragment manager debugging 300 * logs are turned on. If enabled, you will see output in logcat as 301 * the framework performs fragment operations. 302 */ 303 public static void enableDebugLogging(boolean enabled) { 304 FragmentManagerImpl.DEBUG = enabled; 305 } 306} 307 308final class FragmentManagerState implements Parcelable { 309 FragmentState[] mActive; 310 int[] mAdded; 311 BackStackState[] mBackStack; 312 313 public FragmentManagerState() { 314 } 315 316 public FragmentManagerState(Parcel in) { 317 mActive = in.createTypedArray(FragmentState.CREATOR); 318 mAdded = in.createIntArray(); 319 mBackStack = in.createTypedArray(BackStackState.CREATOR); 320 } 321 322 public int describeContents() { 323 return 0; 324 } 325 326 public void writeToParcel(Parcel dest, int flags) { 327 dest.writeTypedArray(mActive, flags); 328 dest.writeIntArray(mAdded); 329 dest.writeTypedArray(mBackStack, flags); 330 } 331 332 public static final Parcelable.Creator<FragmentManagerState> CREATOR 333 = new Parcelable.Creator<FragmentManagerState>() { 334 public FragmentManagerState createFromParcel(Parcel in) { 335 return new FragmentManagerState(in); 336 } 337 338 public FragmentManagerState[] newArray(int size) { 339 return new FragmentManagerState[size]; 340 } 341 }; 342} 343 344/** 345 * Container for fragments associated with an activity. 346 */ 347final class FragmentManagerImpl extends FragmentManager { 348 static boolean DEBUG = false; 349 static final String TAG = "FragmentManager"; 350 351 static final boolean HONEYCOMB = android.os.Build.VERSION.SDK_INT >= 11; 352 353 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 354 static final String TARGET_STATE_TAG = "android:target_state"; 355 static final String VIEW_STATE_TAG = "android:view_state"; 356 357 ArrayList<Runnable> mPendingActions; 358 Runnable[] mTmpActions; 359 boolean mExecutingActions; 360 361 ArrayList<Fragment> mActive; 362 ArrayList<Fragment> mAdded; 363 ArrayList<Integer> mAvailIndices; 364 ArrayList<BackStackRecord> mBackStack; 365 ArrayList<Fragment> mCreatedMenus; 366 367 // Must be accessed while locked. 368 ArrayList<BackStackRecord> mBackStackIndices; 369 ArrayList<Integer> mAvailBackStackIndices; 370 371 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 372 373 int mCurState = Fragment.INITIALIZING; 374 FragmentActivity mActivity; 375 376 boolean mNeedMenuInvalidate; 377 boolean mStateSaved; 378 boolean mDestroyed; 379 String mNoTransactionsBecause; 380 381 // Temporary vars for state save and restore. 382 Bundle mStateBundle = null; 383 SparseArray<Parcelable> mStateArray = null; 384 385 Runnable mExecCommit = new Runnable() { 386 @Override 387 public void run() { 388 execPendingActions(); 389 } 390 }; 391 392 @Override 393 public FragmentTransaction beginTransaction() { 394 return new BackStackRecord(this); 395 } 396 397 @Override 398 public boolean executePendingTransactions() { 399 return execPendingActions(); 400 } 401 402 @Override 403 public void popBackStack() { 404 enqueueAction(new Runnable() { 405 @Override public void run() { 406 popBackStackState(mActivity.mHandler, null, -1, 0); 407 } 408 }, false); 409 } 410 411 @Override 412 public boolean popBackStackImmediate() { 413 checkStateLoss(); 414 executePendingTransactions(); 415 return popBackStackState(mActivity.mHandler, null, -1, 0); 416 } 417 418 @Override 419 public void popBackStack(final String name, final int flags) { 420 enqueueAction(new Runnable() { 421 @Override public void run() { 422 popBackStackState(mActivity.mHandler, name, -1, flags); 423 } 424 }, false); 425 } 426 427 @Override 428 public boolean popBackStackImmediate(String name, int flags) { 429 checkStateLoss(); 430 executePendingTransactions(); 431 return popBackStackState(mActivity.mHandler, name, -1, flags); 432 } 433 434 @Override 435 public void popBackStack(final int id, final int flags) { 436 if (id < 0) { 437 throw new IllegalArgumentException("Bad id: " + id); 438 } 439 enqueueAction(new Runnable() { 440 @Override public void run() { 441 popBackStackState(mActivity.mHandler, null, id, flags); 442 } 443 }, false); 444 } 445 446 @Override 447 public boolean popBackStackImmediate(int id, int flags) { 448 checkStateLoss(); 449 executePendingTransactions(); 450 if (id < 0) { 451 throw new IllegalArgumentException("Bad id: " + id); 452 } 453 return popBackStackState(mActivity.mHandler, null, id, flags); 454 } 455 456 @Override 457 public int getBackStackEntryCount() { 458 return mBackStack != null ? mBackStack.size() : 0; 459 } 460 461 @Override 462 public BackStackEntry getBackStackEntryAt(int index) { 463 return mBackStack.get(index); 464 } 465 466 @Override 467 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 468 if (mBackStackChangeListeners == null) { 469 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 470 } 471 mBackStackChangeListeners.add(listener); 472 } 473 474 @Override 475 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 476 if (mBackStackChangeListeners != null) { 477 mBackStackChangeListeners.remove(listener); 478 } 479 } 480 481 @Override 482 public void putFragment(Bundle bundle, String key, Fragment fragment) { 483 if (fragment.mIndex < 0) { 484 throw new IllegalStateException("Fragment " + fragment 485 + " is not currently in the FragmentManager"); 486 } 487 bundle.putInt(key, fragment.mIndex); 488 } 489 490 @Override 491 public Fragment getFragment(Bundle bundle, String key) { 492 int index = bundle.getInt(key, -1); 493 if (index == -1) { 494 return null; 495 } 496 if (index >= mActive.size()) { 497 throw new IllegalStateException("Fragement no longer exists for key " 498 + key + ": index " + index); 499 } 500 Fragment f = mActive.get(index); 501 if (f == null) { 502 throw new IllegalStateException("Fragement no longer exists for key " 503 + key + ": index " + index); 504 } 505 return f; 506 } 507 508 @Override 509 public String toString() { 510 StringBuilder sb = new StringBuilder(128); 511 sb.append("FragmentManager{"); 512 sb.append(Integer.toHexString(System.identityHashCode(this))); 513 sb.append(" in "); 514 DebugUtils.buildShortClassTag(mActivity, sb); 515 sb.append("}}"); 516 return sb.toString(); 517 } 518 519 @Override 520 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 521 String innerPrefix = prefix + " "; 522 523 int N; 524 if (mActive != null) { 525 N = mActive.size(); 526 if (N > 0) { 527 writer.print(prefix); writer.print("Active Fragments in "); 528 writer.print(Integer.toHexString(System.identityHashCode(this))); 529 writer.println(":"); 530 for (int i=0; i<N; i++) { 531 Fragment f = mActive.get(i); 532 writer.print(prefix); writer.print(" #"); writer.print(i); 533 writer.print(": "); writer.println(f); 534 if (f != null) { 535 f.dump(innerPrefix, fd, writer, args); 536 } 537 } 538 } 539 } 540 541 if (mAdded != null) { 542 N = mAdded.size(); 543 if (N > 0) { 544 writer.print(prefix); writer.println("Added Fragments:"); 545 for (int i=0; i<N; i++) { 546 Fragment f = mAdded.get(i); 547 writer.print(prefix); writer.print(" #"); writer.print(i); 548 writer.print(": "); writer.println(f.toString()); 549 } 550 } 551 } 552 553 if (mCreatedMenus != null) { 554 N = mCreatedMenus.size(); 555 if (N > 0) { 556 writer.print(prefix); writer.println("Fragments Created Menus:"); 557 for (int i=0; i<N; i++) { 558 Fragment f = mCreatedMenus.get(i); 559 writer.print(prefix); writer.print(" #"); writer.print(i); 560 writer.print(": "); writer.println(f.toString()); 561 } 562 } 563 } 564 565 if (mBackStack != null) { 566 N = mBackStack.size(); 567 if (N > 0) { 568 writer.print(prefix); writer.println("Back Stack:"); 569 for (int i=0; i<N; i++) { 570 BackStackRecord bs = mBackStack.get(i); 571 writer.print(prefix); writer.print(" #"); writer.print(i); 572 writer.print(": "); writer.println(bs.toString()); 573 bs.dump(innerPrefix, fd, writer, args); 574 } 575 } 576 } 577 578 synchronized (this) { 579 if (mBackStackIndices != null) { 580 N = mBackStackIndices.size(); 581 if (N > 0) { 582 writer.print(prefix); writer.println("Back Stack Indices:"); 583 for (int i=0; i<N; i++) { 584 BackStackRecord bs = mBackStackIndices.get(i); 585 writer.print(prefix); writer.print(" #"); writer.print(i); 586 writer.print(": "); writer.println(bs); 587 } 588 } 589 } 590 591 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 592 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 593 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 594 } 595 } 596 597 if (mPendingActions != null) { 598 N = mPendingActions.size(); 599 if (N > 0) { 600 writer.print(prefix); writer.println("Pending Actions:"); 601 for (int i=0; i<N; i++) { 602 Runnable r = mPendingActions.get(i); 603 writer.print(prefix); writer.print(" #"); writer.print(i); 604 writer.print(": "); writer.println(r); 605 } 606 } 607 } 608 609 writer.print(prefix); writer.println("FragmentManager misc state:"); 610 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 611 writer.print(" mStateSaved="); writer.print(mStateSaved); 612 writer.print(" mDestroyed="); writer.println(mDestroyed); 613 if (mNeedMenuInvalidate) { 614 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 615 writer.println(mNeedMenuInvalidate); 616 } 617 if (mNoTransactionsBecause != null) { 618 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 619 writer.println(mNoTransactionsBecause); 620 } 621 if (mAvailIndices != null && mAvailIndices.size() > 0) { 622 writer.print(prefix); writer.print(" mAvailIndices: "); 623 writer.println(Arrays.toString(mAvailIndices.toArray())); 624 } 625 } 626 627 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 628 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 629 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 630 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 631 632 static final int ANIM_DUR = 220; 633 634 static Animation makeOpenCloseAnimation(Context context, float startScale, 635 float endScale, float startAlpha, float endAlpha) { 636 AnimationSet set = new AnimationSet(false); 637 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 638 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 639 scale.setInterpolator(DECELERATE_QUINT); 640 scale.setDuration(ANIM_DUR); 641 set.addAnimation(scale); 642 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 643 alpha.setInterpolator(DECELERATE_CUBIC); 644 alpha.setDuration(ANIM_DUR); 645 set.addAnimation(alpha); 646 return set; 647 } 648 649 static Animation makeFadeAnimation(Context context, float start, float end) { 650 AlphaAnimation anim = new AlphaAnimation(start, end); 651 anim.setInterpolator(DECELERATE_CUBIC); 652 anim.setDuration(ANIM_DUR); 653 return anim; 654 } 655 656 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 657 int transitionStyle) { 658 Animation animObj = fragment.onCreateAnimation(transit, enter, 659 fragment.mNextAnim); 660 if (animObj != null) { 661 return animObj; 662 } 663 664 if (fragment.mNextAnim != 0) { 665 Animation anim = AnimationUtils.loadAnimation(mActivity, fragment.mNextAnim); 666 if (anim != null) { 667 return anim; 668 } 669 } 670 671 if (transit == 0) { 672 return null; 673 } 674 675 int styleIndex = transitToStyleIndex(transit, enter); 676 if (styleIndex < 0) { 677 return null; 678 } 679 680 switch (styleIndex) { 681 case ANIM_STYLE_OPEN_ENTER: 682 return makeOpenCloseAnimation(mActivity, 1.125f, 1.0f, 0, 1); 683 case ANIM_STYLE_OPEN_EXIT: 684 return makeOpenCloseAnimation(mActivity, 1.0f, .975f, 1, 0); 685 case ANIM_STYLE_CLOSE_ENTER: 686 return makeOpenCloseAnimation(mActivity, .975f, 1.0f, 0, 1); 687 case ANIM_STYLE_CLOSE_EXIT: 688 return makeOpenCloseAnimation(mActivity, 1.0f, 1.075f, 1, 0); 689 case ANIM_STYLE_FADE_ENTER: 690 return makeFadeAnimation(mActivity, 0, 1); 691 case ANIM_STYLE_FADE_EXIT: 692 return makeFadeAnimation(mActivity, 1, 0); 693 } 694 695 if (transitionStyle == 0 && mActivity.getWindow() != null) { 696 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 697 } 698 if (transitionStyle == 0) { 699 return null; 700 } 701 702 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 703 // com.android.internal.R.styleable.FragmentAnimation); 704 //int anim = attrs.getResourceId(styleIndex, 0); 705 //attrs.recycle(); 706 707 //if (anim == 0) { 708 // return null; 709 //} 710 711 //return AnimatorInflater.loadAnimator(mActivity, anim); 712 return null; 713 } 714 715 void moveToState(Fragment f, int newState, int transit, int transitionStyle) { 716 // Fragments that are not currently added will sit in the onCreate() state. 717 if (!f.mAdded && newState > Fragment.CREATED) { 718 newState = Fragment.CREATED; 719 } 720 721 if (f.mState < newState) { 722 // For fragments that are created from a layout, when restoring from 723 // state we don't want to allow them to be created until they are 724 // being reloaded from the layout. 725 if (f.mFromLayout && !f.mInLayout) { 726 return; 727 } 728 if (f.mAnimatingAway != null) { 729 // The fragment is currently being animated... but! Now we 730 // want to move our state back up. Give up on waiting for the 731 // animation, move to whatever the final state should be once 732 // the animation is done, and then we can proceed from there. 733 f.mAnimatingAway = null; 734 moveToState(f, f.mStateAfterAnimating, 0, 0); 735 } 736 switch (f.mState) { 737 case Fragment.INITIALIZING: 738 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 739 if (f.mSavedFragmentState != null) { 740 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 741 FragmentManagerImpl.VIEW_STATE_TAG); 742 f.mTarget = getFragment(f.mSavedFragmentState, 743 FragmentManagerImpl.TARGET_STATE_TAG); 744 if (f.mTarget != null) { 745 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 746 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 747 } 748 } 749 f.mActivity = mActivity; 750 f.mFragmentManager = mActivity.mFragments; 751 f.mCalled = false; 752 f.onAttach(mActivity); 753 if (!f.mCalled) { 754 throw new SuperNotCalledException("Fragment " + f 755 + " did not call through to super.onAttach()"); 756 } 757 mActivity.onAttachFragment(f); 758 759 if (!f.mRetaining) { 760 f.mCalled = false; 761 f.onCreate(f.mSavedFragmentState); 762 if (!f.mCalled) { 763 throw new SuperNotCalledException("Fragment " + f 764 + " did not call through to super.onCreate()"); 765 } 766 } 767 f.mRetaining = false; 768 if (f.mFromLayout) { 769 // For fragments that are part of the content view 770 // layout, we need to instantiate the view immediately 771 // and the inflater will take care of adding it. 772 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 773 null, f.mSavedFragmentState); 774 if (f.mView != null) { 775 f.mInnerView = f.mView; 776 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 777 if (f.mHidden) f.mView.setVisibility(View.GONE); 778 f.onViewCreated(f.mView, f.mSavedFragmentState); 779 } else { 780 f.mInnerView = null; 781 } 782 } 783 case Fragment.CREATED: 784 if (newState > Fragment.CREATED) { 785 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 786 if (!f.mFromLayout) { 787 ViewGroup container = null; 788 if (f.mContainerId != 0) { 789 container = (ViewGroup)mActivity.findViewById(f.mContainerId); 790 if (container == null && !f.mRestored) { 791 throw new IllegalArgumentException("No view found for id 0x" 792 + Integer.toHexString(f.mContainerId) 793 + " for fragment " + f); 794 } 795 } 796 f.mContainer = container; 797 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 798 container, f.mSavedFragmentState); 799 if (f.mView != null) { 800 f.mInnerView = f.mView; 801 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 802 if (container != null) { 803 Animation anim = loadAnimation(f, transit, true, 804 transitionStyle); 805 if (anim != null) { 806 f.mView.startAnimation(anim); 807 } 808 container.addView(f.mView); 809 } 810 if (f.mHidden) f.mView.setVisibility(View.GONE); 811 f.onViewCreated(f.mView, f.mSavedFragmentState); 812 } else { 813 f.mInnerView = null; 814 } 815 } 816 817 f.mCalled = false; 818 f.onActivityCreated(f.mSavedFragmentState); 819 if (!f.mCalled) { 820 throw new SuperNotCalledException("Fragment " + f 821 + " did not call through to super.onActivityCreated()"); 822 } 823 if (f.mView != null) { 824 f.restoreViewState(); 825 } 826 f.mSavedFragmentState = null; 827 } 828 case Fragment.ACTIVITY_CREATED: 829 case Fragment.STOPPED: 830 if (newState > Fragment.STOPPED) { 831 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 832 f.mCalled = false; 833 f.onStart(); 834 if (!f.mCalled) { 835 throw new SuperNotCalledException("Fragment " + f 836 + " did not call through to super.onStart()"); 837 } 838 } 839 case Fragment.STARTED: 840 if (newState > Fragment.STARTED) { 841 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 842 f.mCalled = false; 843 f.mResumed = true; 844 f.onResume(); 845 if (!f.mCalled) { 846 throw new SuperNotCalledException("Fragment " + f 847 + " did not call through to super.onResume()"); 848 } 849 } 850 } 851 } else if (f.mState > newState) { 852 switch (f.mState) { 853 case Fragment.RESUMED: 854 if (newState < Fragment.RESUMED) { 855 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 856 f.mCalled = false; 857 f.onPause(); 858 if (!f.mCalled) { 859 throw new SuperNotCalledException("Fragment " + f 860 + " did not call through to super.onPause()"); 861 } 862 f.mResumed = false; 863 } 864 case Fragment.STARTED: 865 if (newState < Fragment.STARTED) { 866 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 867 f.mCalled = false; 868 f.performStop(); 869 if (!f.mCalled) { 870 throw new SuperNotCalledException("Fragment " + f 871 + " did not call through to super.onStop()"); 872 } 873 } 874 case Fragment.STOPPED: 875 case Fragment.ACTIVITY_CREATED: 876 if (newState < Fragment.ACTIVITY_CREATED) { 877 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 878 if (f.mView != null) { 879 // Need to save the current view state if not 880 // done already. 881 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 882 saveFragmentViewState(f); 883 } 884 } 885 f.mCalled = false; 886 f.onDestroyView(); 887 if (!f.mCalled) { 888 throw new SuperNotCalledException("Fragment " + f 889 + " did not call through to super.onDestroyView()"); 890 } 891 if (f.mView != null && f.mContainer != null) { 892 Animation anim = null; 893 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 894 anim = loadAnimation(f, transit, false, 895 transitionStyle); 896 } 897 if (anim != null) { 898 final Fragment fragment = f; 899 f.mAnimatingAway = f.mView; 900 f.mStateAfterAnimating = newState; 901 anim.setAnimationListener(new AnimationListener() { 902 @Override 903 public void onAnimationEnd(Animation animation) { 904 if (fragment.mAnimatingAway != null) { 905 fragment.mAnimatingAway = null; 906 moveToState(fragment, fragment.mStateAfterAnimating, 907 0, 0); 908 } 909 } 910 @Override 911 public void onAnimationRepeat(Animation animation) { 912 } 913 @Override 914 public void onAnimationStart(Animation animation) { 915 } 916 }); 917 f.mView.startAnimation(anim); 918 } 919 f.mContainer.removeView(f.mView); 920 } 921 f.mContainer = null; 922 f.mView = null; 923 f.mInnerView = null; 924 } 925 case Fragment.CREATED: 926 if (newState < Fragment.CREATED) { 927 if (mDestroyed) { 928 if (f.mAnimatingAway != null) { 929 // The fragment's containing activity is 930 // being destroyed, but this fragment is 931 // currently animating away. Stop the 932 // animation right now -- it is not needed, 933 // and we can't wait any more on destroying 934 // the fragment. 935 View v = f.mAnimatingAway; 936 f.mAnimatingAway = null; 937 v.clearAnimation(); 938 } 939 } 940 if (f.mAnimatingAway != null) { 941 // We are waiting for the fragment's view to finish 942 // animating away. Just make a note of the state 943 // the fragment now should move to once the animation 944 // is done. 945 f.mStateAfterAnimating = newState; 946 } else { 947 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 948 if (!f.mRetaining) { 949 f.mCalled = false; 950 f.onDestroy(); 951 if (!f.mCalled) { 952 throw new SuperNotCalledException("Fragment " + f 953 + " did not call through to super.onDestroy()"); 954 } 955 } 956 957 f.mCalled = false; 958 f.onDetach(); 959 if (!f.mCalled) { 960 throw new SuperNotCalledException("Fragment " + f 961 + " did not call through to super.onDetach()"); 962 } 963 f.mImmediateActivity = null; 964 f.mActivity = null; 965 f.mFragmentManager = null; 966 } 967 } 968 } 969 } 970 971 f.mState = newState; 972 } 973 974 void moveToState(Fragment f) { 975 moveToState(f, mCurState, 0, 0); 976 } 977 978 void moveToState(int newState, boolean always) { 979 moveToState(newState, 0, 0, always); 980 } 981 982 void moveToState(int newState, int transit, int transitStyle, boolean always) { 983 if (mActivity == null && newState != Fragment.INITIALIZING) { 984 throw new IllegalStateException("No activity"); 985 } 986 987 if (!always && mCurState == newState) { 988 return; 989 } 990 991 mCurState = newState; 992 if (mActive != null) { 993 for (int i=0; i<mActive.size(); i++) { 994 Fragment f = mActive.get(i); 995 if (f != null) { 996 moveToState(f, newState, transit, transitStyle); 997 } 998 } 999 1000 if (mNeedMenuInvalidate && mActivity != null) { 1001 mActivity.supportInvalidateOptionsMenu(); 1002 mNeedMenuInvalidate = false; 1003 } 1004 } 1005 } 1006 1007 void makeActive(Fragment f) { 1008 if (f.mIndex >= 0) { 1009 return; 1010 } 1011 1012 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1013 if (mActive == null) { 1014 mActive = new ArrayList<Fragment>(); 1015 } 1016 f.setIndex(mActive.size()); 1017 mActive.add(f); 1018 1019 } else { 1020 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1)); 1021 mActive.set(f.mIndex, f); 1022 } 1023 } 1024 1025 void makeInactive(Fragment f) { 1026 if (f.mIndex < 0) { 1027 return; 1028 } 1029 1030 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f.mIndex); 1031 mActive.set(f.mIndex, null); 1032 if (mAvailIndices == null) { 1033 mAvailIndices = new ArrayList<Integer>(); 1034 } 1035 mAvailIndices.add(f.mIndex); 1036 mActivity.invalidateSupportFragmentIndex(f.mIndex); 1037 f.clearIndex(); 1038 } 1039 1040 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1041 if (mAdded == null) { 1042 mAdded = new ArrayList<Fragment>(); 1043 } 1044 if (DEBUG) Log.v(TAG, "add: " + fragment); 1045 makeActive(fragment); 1046 if (!fragment.mDetached) { 1047 mAdded.add(fragment); 1048 fragment.mAdded = true; 1049 fragment.mRemoving = false; 1050 if (fragment.mHasMenu) { 1051 mNeedMenuInvalidate = true; 1052 } 1053 if (moveToStateNow) { 1054 moveToState(fragment); 1055 } 1056 } 1057 } 1058 1059 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1060 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1061 final boolean inactive = !fragment.isInBackStack(); 1062 if (!fragment.mDetached || inactive) { 1063 mAdded.remove(fragment); 1064 if (fragment.mHasMenu) { 1065 mNeedMenuInvalidate = true; 1066 } 1067 fragment.mAdded = false; 1068 fragment.mRemoving = true; 1069 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1070 transition, transitionStyle); 1071 if (inactive) { 1072 makeInactive(fragment); 1073 } 1074 } 1075 } 1076 1077 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1078 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1079 if (!fragment.mHidden) { 1080 fragment.mHidden = true; 1081 if (fragment.mView != null) { 1082 Animation anim = loadAnimation(fragment, transition, true, 1083 transitionStyle); 1084 if (anim != null) { 1085 fragment.mView.startAnimation(anim); 1086 } 1087 fragment.mView.setVisibility(View.GONE); 1088 } 1089 if (fragment.mAdded && fragment.mHasMenu) { 1090 mNeedMenuInvalidate = true; 1091 } 1092 fragment.onHiddenChanged(true); 1093 } 1094 } 1095 1096 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1097 if (DEBUG) Log.v(TAG, "show: " + fragment); 1098 if (fragment.mHidden) { 1099 fragment.mHidden = false; 1100 if (fragment.mView != null) { 1101 Animation anim = loadAnimation(fragment, transition, true, 1102 transitionStyle); 1103 if (anim != null) { 1104 fragment.mView.startAnimation(anim); 1105 } 1106 fragment.mView.setVisibility(View.VISIBLE); 1107 } 1108 if (fragment.mAdded && fragment.mHasMenu) { 1109 mNeedMenuInvalidate = true; 1110 } 1111 fragment.onHiddenChanged(false); 1112 } 1113 } 1114 1115 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1116 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1117 if (!fragment.mDetached) { 1118 fragment.mDetached = true; 1119 if (fragment.mAdded) { 1120 // We are not already in back stack, so need to remove the fragment. 1121 mAdded.remove(fragment); 1122 if (fragment.mHasMenu) { 1123 mNeedMenuInvalidate = true; 1124 } 1125 fragment.mAdded = false; 1126 fragment.mRemoving = true; 1127 moveToState(fragment, Fragment.CREATED, transition, transitionStyle); 1128 } 1129 } 1130 } 1131 1132 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1133 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1134 if (fragment.mDetached) { 1135 fragment.mDetached = false; 1136 if (!fragment.mAdded) { 1137 mAdded.add(fragment); 1138 fragment.mAdded = true; 1139 fragment.mRemoving = false; 1140 if (fragment.mHasMenu) { 1141 mNeedMenuInvalidate = true; 1142 } 1143 moveToState(fragment, mCurState, transition, transitionStyle); 1144 } 1145 } 1146 } 1147 1148 public Fragment findFragmentById(int id) { 1149 if (mActive != null) { 1150 // First look through added fragments. 1151 for (int i=mAdded.size()-1; i>=0; i--) { 1152 Fragment f = mAdded.get(i); 1153 if (f != null && f.mFragmentId == id) { 1154 return f; 1155 } 1156 } 1157 // Now for any known fragment. 1158 for (int i=mActive.size()-1; i>=0; i--) { 1159 Fragment f = mActive.get(i); 1160 if (f != null && f.mFragmentId == id) { 1161 return f; 1162 } 1163 } 1164 } 1165 return null; 1166 } 1167 1168 public Fragment findFragmentByTag(String tag) { 1169 if (mActive != null && tag != null) { 1170 // First look through added fragments. 1171 for (int i=mAdded.size()-1; i>=0; i--) { 1172 Fragment f = mAdded.get(i); 1173 if (f != null && tag.equals(f.mTag)) { 1174 return f; 1175 } 1176 } 1177 // Now for any known fragment. 1178 for (int i=mActive.size()-1; i>=0; i--) { 1179 Fragment f = mActive.get(i); 1180 if (f != null && tag.equals(f.mTag)) { 1181 return f; 1182 } 1183 } 1184 } 1185 return null; 1186 } 1187 1188 public Fragment findFragmentByWho(String who) { 1189 if (mActive != null && who != null) { 1190 for (int i=mActive.size()-1; i>=0; i--) { 1191 Fragment f = mActive.get(i); 1192 if (f != null && who.equals(f.mWho)) { 1193 return f; 1194 } 1195 } 1196 } 1197 return null; 1198 } 1199 1200 private void checkStateLoss() { 1201 if (mStateSaved) { 1202 throw new IllegalStateException( 1203 "Can not perform this action after onSaveInstanceState"); 1204 } 1205 if (mNoTransactionsBecause != null) { 1206 throw new IllegalStateException( 1207 "Can not perform this action inside of " + mNoTransactionsBecause); 1208 } 1209 } 1210 1211 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1212 if (!allowStateLoss) { 1213 checkStateLoss(); 1214 } 1215 synchronized (this) { 1216 if (mActivity == null) { 1217 throw new IllegalStateException("Activity has been destroyed"); 1218 } 1219 if (mPendingActions == null) { 1220 mPendingActions = new ArrayList<Runnable>(); 1221 } 1222 mPendingActions.add(action); 1223 if (mPendingActions.size() == 1) { 1224 mActivity.mHandler.removeCallbacks(mExecCommit); 1225 mActivity.mHandler.post(mExecCommit); 1226 } 1227 } 1228 } 1229 1230 public int allocBackStackIndex(BackStackRecord bse) { 1231 synchronized (this) { 1232 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1233 if (mBackStackIndices == null) { 1234 mBackStackIndices = new ArrayList<BackStackRecord>(); 1235 } 1236 int index = mBackStackIndices.size(); 1237 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1238 mBackStackIndices.add(bse); 1239 return index; 1240 1241 } else { 1242 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1243 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1244 mBackStackIndices.set(index, bse); 1245 return index; 1246 } 1247 } 1248 } 1249 1250 public void setBackStackIndex(int index, BackStackRecord bse) { 1251 synchronized (this) { 1252 if (mBackStackIndices == null) { 1253 mBackStackIndices = new ArrayList<BackStackRecord>(); 1254 } 1255 int N = mBackStackIndices.size(); 1256 if (index < N) { 1257 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1258 mBackStackIndices.set(index, bse); 1259 } else { 1260 while (N < index) { 1261 mBackStackIndices.add(null); 1262 if (mAvailBackStackIndices == null) { 1263 mAvailBackStackIndices = new ArrayList<Integer>(); 1264 } 1265 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1266 mAvailBackStackIndices.add(N); 1267 N++; 1268 } 1269 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1270 mBackStackIndices.add(bse); 1271 } 1272 } 1273 } 1274 1275 public void freeBackStackIndex(int index) { 1276 synchronized (this) { 1277 mBackStackIndices.set(index, null); 1278 if (mAvailBackStackIndices == null) { 1279 mAvailBackStackIndices = new ArrayList<Integer>(); 1280 } 1281 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1282 mAvailBackStackIndices.add(index); 1283 } 1284 } 1285 1286 /** 1287 * Only call from main thread! 1288 */ 1289 public boolean execPendingActions() { 1290 if (mExecutingActions) { 1291 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1292 } 1293 1294 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1295 throw new IllegalStateException("Must be called from main thread of process"); 1296 } 1297 1298 boolean didSomething = false; 1299 1300 while (true) { 1301 int numActions; 1302 1303 synchronized (this) { 1304 if (mPendingActions == null || mPendingActions.size() == 0) { 1305 return didSomething; 1306 } 1307 1308 numActions = mPendingActions.size(); 1309 if (mTmpActions == null || mTmpActions.length < numActions) { 1310 mTmpActions = new Runnable[numActions]; 1311 } 1312 mPendingActions.toArray(mTmpActions); 1313 mPendingActions.clear(); 1314 mActivity.mHandler.removeCallbacks(mExecCommit); 1315 } 1316 1317 mExecutingActions = true; 1318 for (int i=0; i<numActions; i++) { 1319 mTmpActions[i].run(); 1320 } 1321 mExecutingActions = false; 1322 didSomething = true; 1323 } 1324 } 1325 1326 void reportBackStackChanged() { 1327 if (mBackStackChangeListeners != null) { 1328 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1329 mBackStackChangeListeners.get(i).onBackStackChanged(); 1330 } 1331 } 1332 } 1333 1334 void addBackStackState(BackStackRecord state) { 1335 if (mBackStack == null) { 1336 mBackStack = new ArrayList<BackStackRecord>(); 1337 } 1338 mBackStack.add(state); 1339 reportBackStackChanged(); 1340 } 1341 1342 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1343 if (mBackStack == null) { 1344 return false; 1345 } 1346 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1347 int last = mBackStack.size()-1; 1348 if (last < 0) { 1349 return false; 1350 } 1351 final BackStackRecord bss = mBackStack.remove(last); 1352 bss.popFromBackStack(true); 1353 reportBackStackChanged(); 1354 } else { 1355 int index = -1; 1356 if (name != null || id >= 0) { 1357 // If a name or ID is specified, look for that place in 1358 // the stack. 1359 index = mBackStack.size()-1; 1360 while (index >= 0) { 1361 BackStackRecord bss = mBackStack.get(index); 1362 if (name != null && name.equals(bss.getName())) { 1363 break; 1364 } 1365 if (id >= 0 && id == bss.mIndex) { 1366 break; 1367 } 1368 index--; 1369 } 1370 if (index < 0) { 1371 return false; 1372 } 1373 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1374 index--; 1375 // Consume all following entries that match. 1376 while (index >= 0) { 1377 BackStackRecord bss = mBackStack.get(index); 1378 if ((name != null && name.equals(bss.getName())) 1379 || (id >= 0 && id == bss.mIndex)) { 1380 index--; 1381 continue; 1382 } 1383 break; 1384 } 1385 } 1386 } 1387 if (index == mBackStack.size()-1) { 1388 return false; 1389 } 1390 final ArrayList<BackStackRecord> states 1391 = new ArrayList<BackStackRecord>(); 1392 for (int i=mBackStack.size()-1; i>index; i--) { 1393 states.add(mBackStack.remove(i)); 1394 } 1395 final int LAST = states.size()-1; 1396 for (int i=0; i<=LAST; i++) { 1397 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1398 states.get(i).popFromBackStack(i == LAST); 1399 } 1400 reportBackStackChanged(); 1401 } 1402 return true; 1403 } 1404 1405 ArrayList<Fragment> retainNonConfig() { 1406 ArrayList<Fragment> fragments = null; 1407 if (mActive != null) { 1408 for (int i=0; i<mActive.size(); i++) { 1409 Fragment f = mActive.get(i); 1410 if (f != null && f.mRetainInstance) { 1411 if (fragments == null) { 1412 fragments = new ArrayList<Fragment>(); 1413 } 1414 fragments.add(f); 1415 f.mRetaining = true; 1416 } 1417 } 1418 } 1419 return fragments; 1420 } 1421 1422 void saveFragmentViewState(Fragment f) { 1423 if (f.mInnerView == null) { 1424 return; 1425 } 1426 if (mStateArray == null) { 1427 mStateArray = new SparseArray<Parcelable>(); 1428 } else { 1429 mStateArray.clear(); 1430 } 1431 f.mInnerView.saveHierarchyState(mStateArray); 1432 if (mStateArray.size() > 0) { 1433 f.mSavedViewState = mStateArray; 1434 mStateArray = null; 1435 } 1436 } 1437 1438 Parcelable saveAllState() { 1439 // Make sure all pending operations have now been executed to get 1440 // our state update-to-date. 1441 execPendingActions(); 1442 1443 if (HONEYCOMB) { 1444 // As of Honeycomb, we save state after pausing. Prior to that 1445 // it is before pausing. With fragments this is an issue, since 1446 // there are many things you may do after pausing but before 1447 // stopping that change the fragment state. For those older 1448 // devices, we will not at this point say that we have saved 1449 // the state, so we will allow them to continue doing fragment 1450 // transactions. This retains the same semantics as Honeycomb, 1451 // though you do have the risk of losing the very most recent state 1452 // if the process is killed... we'll live with that. 1453 mStateSaved = true; 1454 } 1455 1456 if (mActive == null || mActive.size() <= 0) { 1457 return null; 1458 } 1459 1460 // First collect all active fragments. 1461 int N = mActive.size(); 1462 FragmentState[] active = new FragmentState[N]; 1463 boolean haveFragments = false; 1464 for (int i=0; i<N; i++) { 1465 Fragment f = mActive.get(i); 1466 if (f != null) { 1467 haveFragments = true; 1468 1469 FragmentState fs = new FragmentState(f); 1470 active[i] = fs; 1471 1472 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1473 if (mStateBundle == null) { 1474 mStateBundle = new Bundle(); 1475 } 1476 f.onSaveInstanceState(mStateBundle); 1477 if (!mStateBundle.isEmpty()) { 1478 fs.mSavedFragmentState = mStateBundle; 1479 mStateBundle = null; 1480 } 1481 1482 if (f.mView != null) { 1483 saveFragmentViewState(f); 1484 if (f.mSavedViewState != null) { 1485 if (fs.mSavedFragmentState == null) { 1486 fs.mSavedFragmentState = new Bundle(); 1487 } 1488 fs.mSavedFragmentState.putSparseParcelableArray( 1489 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1490 } 1491 } 1492 1493 if (f.mTarget != null) { 1494 if (f.mTarget.mIndex < 0) { 1495 String msg = "Failure saving state: " + f 1496 + " has target not in fragment manager: " + f.mTarget; 1497 Log.e(TAG, msg); 1498 dump(" ", null, new PrintWriter(new LogWriter(TAG)), new String[] { }); 1499 throw new IllegalStateException(msg); 1500 } 1501 if (fs.mSavedFragmentState == null) { 1502 fs.mSavedFragmentState = new Bundle(); 1503 } 1504 putFragment(fs.mSavedFragmentState, 1505 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1506 if (f.mTargetRequestCode != 0) { 1507 fs.mSavedFragmentState.putInt( 1508 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1509 f.mTargetRequestCode); 1510 } 1511 } 1512 1513 } else { 1514 fs.mSavedFragmentState = f.mSavedFragmentState; 1515 } 1516 1517 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1518 + fs.mSavedFragmentState); 1519 } 1520 } 1521 1522 if (!haveFragments) { 1523 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1524 return null; 1525 } 1526 1527 int[] added = null; 1528 BackStackState[] backStack = null; 1529 1530 // Build list of currently added fragments. 1531 if (mAdded != null) { 1532 N = mAdded.size(); 1533 if (N > 0) { 1534 added = new int[N]; 1535 for (int i=0; i<N; i++) { 1536 added[i] = mAdded.get(i).mIndex; 1537 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1538 + ": " + mAdded.get(i)); 1539 } 1540 } 1541 } 1542 1543 // Now save back stack. 1544 if (mBackStack != null) { 1545 N = mBackStack.size(); 1546 if (N > 0) { 1547 backStack = new BackStackState[N]; 1548 for (int i=0; i<N; i++) { 1549 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1550 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1551 + ": " + mBackStack.get(i)); 1552 } 1553 } 1554 } 1555 1556 FragmentManagerState fms = new FragmentManagerState(); 1557 fms.mActive = active; 1558 fms.mAdded = added; 1559 fms.mBackStack = backStack; 1560 return fms; 1561 } 1562 1563 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1564 // If there is no saved state at all, then there can not be 1565 // any nonConfig fragments either, so that is that. 1566 if (state == null) return; 1567 FragmentManagerState fms = (FragmentManagerState)state; 1568 if (fms.mActive == null) return; 1569 1570 // First re-attach any non-config instances we are retaining back 1571 // to their saved state, so we don't try to instantiate them again. 1572 if (nonConfig != null) { 1573 for (int i=0; i<nonConfig.size(); i++) { 1574 Fragment f = nonConfig.get(i); 1575 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1576 FragmentState fs = fms.mActive[f.mIndex]; 1577 fs.mInstance = f; 1578 f.mSavedViewState = null; 1579 f.mBackStackNesting = 0; 1580 f.mInLayout = false; 1581 f.mAdded = false; 1582 if (fs.mSavedFragmentState != null) { 1583 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1584 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1585 FragmentManagerImpl.VIEW_STATE_TAG); 1586 } 1587 } 1588 } 1589 1590 // Build the full list of active fragments, instantiating them from 1591 // their saved state. 1592 mActive = new ArrayList<Fragment>(fms.mActive.length); 1593 if (mAvailIndices != null) { 1594 mAvailIndices.clear(); 1595 } 1596 for (int i=0; i<fms.mActive.length; i++) { 1597 FragmentState fs = fms.mActive[i]; 1598 if (fs != null) { 1599 Fragment f = fs.instantiate(mActivity); 1600 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1601 mActive.add(f); 1602 // Now that the fragment is instantiated (or came from being 1603 // retained above), clear mInstance in case we end up re-restoring 1604 // from this FragmentState again. 1605 fs.mInstance = null; 1606 } else { 1607 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1608 mActive.add(null); 1609 if (mAvailIndices == null) { 1610 mAvailIndices = new ArrayList<Integer>(); 1611 } 1612 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1613 mAvailIndices.add(i); 1614 } 1615 } 1616 1617 // Update the target of all retained fragments. 1618 if (nonConfig != null) { 1619 for (int i=0; i<nonConfig.size(); i++) { 1620 Fragment f = nonConfig.get(i); 1621 if (f.mTarget != null) { 1622 if (f.mTarget.mIndex < mActive.size()) { 1623 f.mTarget = mActive.get(f.mTarget.mIndex); 1624 } else { 1625 Log.w(TAG, "Re-attaching retained fragment " + f 1626 + " target no longer exists: " + f.mTarget); 1627 f.mTarget = null; 1628 } 1629 } 1630 } 1631 } 1632 1633 // Build the list of currently added fragments. 1634 if (fms.mAdded != null) { 1635 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1636 for (int i=0; i<fms.mAdded.length; i++) { 1637 Fragment f = mActive.get(fms.mAdded[i]); 1638 if (f == null) { 1639 throw new IllegalStateException( 1640 "No instantiated fragment for index #" + fms.mAdded[i]); 1641 } 1642 f.mAdded = true; 1643 f.mImmediateActivity = mActivity; 1644 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1645 mAdded.add(f); 1646 } 1647 } else { 1648 mAdded = null; 1649 } 1650 1651 // Build the back stack. 1652 if (fms.mBackStack != null) { 1653 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1654 for (int i=0; i<fms.mBackStack.length; i++) { 1655 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1656 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1657 + " (index " + bse.mIndex + "): " + bse); 1658 mBackStack.add(bse); 1659 if (bse.mIndex >= 0) { 1660 setBackStackIndex(bse.mIndex, bse); 1661 } 1662 } 1663 } else { 1664 mBackStack = null; 1665 } 1666 } 1667 1668 public void attachActivity(FragmentActivity activity) { 1669 if (mActivity != null) throw new IllegalStateException(); 1670 mActivity = activity; 1671 } 1672 1673 public void noteStateNotSaved() { 1674 mStateSaved = false; 1675 } 1676 1677 public void dispatchCreate() { 1678 mStateSaved = false; 1679 moveToState(Fragment.CREATED, false); 1680 } 1681 1682 public void dispatchActivityCreated() { 1683 mStateSaved = false; 1684 moveToState(Fragment.ACTIVITY_CREATED, false); 1685 } 1686 1687 public void dispatchStart() { 1688 mStateSaved = false; 1689 moveToState(Fragment.STARTED, false); 1690 } 1691 1692 public void dispatchResume() { 1693 mStateSaved = false; 1694 moveToState(Fragment.RESUMED, false); 1695 } 1696 1697 public void dispatchPause() { 1698 moveToState(Fragment.STARTED, false); 1699 } 1700 1701 public void dispatchStop() { 1702 // See saveAllState() for the explanation of this. We do this for 1703 // all platform versions, to keep our behavior more consistent between 1704 // them. 1705 mStateSaved = true; 1706 1707 moveToState(Fragment.STOPPED, false); 1708 } 1709 1710 public void dispatchReallyStop(boolean retaining) { 1711 if (mActive != null) { 1712 for (int i=0; i<mAdded.size(); i++) { 1713 Fragment f = mAdded.get(i); 1714 if (f != null) { 1715 f.performReallyStop(retaining); 1716 } 1717 } 1718 } 1719 } 1720 1721 public void dispatchDestroy() { 1722 mDestroyed = true; 1723 moveToState(Fragment.INITIALIZING, false); 1724 mActivity = null; 1725 } 1726 1727 public void dispatchConfigurationChanged(Configuration newConfig) { 1728 if (mActive != null) { 1729 for (int i=0; i<mAdded.size(); i++) { 1730 Fragment f = mAdded.get(i); 1731 if (f != null) { 1732 f.onConfigurationChanged(newConfig); 1733 } 1734 } 1735 } 1736 } 1737 1738 public void dispatchLowMemory() { 1739 if (mActive != null) { 1740 for (int i=0; i<mAdded.size(); i++) { 1741 Fragment f = mAdded.get(i); 1742 if (f != null) { 1743 f.onLowMemory(); 1744 } 1745 } 1746 } 1747 } 1748 1749 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1750 boolean show = false; 1751 ArrayList<Fragment> newMenus = null; 1752 if (mActive != null) { 1753 for (int i=0; i<mAdded.size(); i++) { 1754 Fragment f = mAdded.get(i); 1755 if (f != null && !f.mHidden && f.mHasMenu) { 1756 show = true; 1757 f.onCreateOptionsMenu(menu, inflater); 1758 if (newMenus == null) { 1759 newMenus = new ArrayList<Fragment>(); 1760 } 1761 newMenus.add(f); 1762 } 1763 } 1764 } 1765 1766 if (mCreatedMenus != null) { 1767 for (int i=0; i<mCreatedMenus.size(); i++) { 1768 Fragment f = mCreatedMenus.get(i); 1769 if (newMenus == null || !newMenus.contains(f)) { 1770 f.onDestroyOptionsMenu(); 1771 } 1772 } 1773 } 1774 1775 mCreatedMenus = newMenus; 1776 1777 return show; 1778 } 1779 1780 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1781 boolean show = false; 1782 if (mActive != null) { 1783 for (int i=0; i<mAdded.size(); i++) { 1784 Fragment f = mAdded.get(i); 1785 if (f != null && !f.mHidden && f.mHasMenu) { 1786 show = true; 1787 f.onPrepareOptionsMenu(menu); 1788 } 1789 } 1790 } 1791 return show; 1792 } 1793 1794 public boolean dispatchOptionsItemSelected(MenuItem item) { 1795 if (mActive != null) { 1796 for (int i=0; i<mAdded.size(); i++) { 1797 Fragment f = mAdded.get(i); 1798 if (f != null && !f.mHidden && f.mHasMenu) { 1799 if (f.onOptionsItemSelected(item)) { 1800 return true; 1801 } 1802 } 1803 } 1804 } 1805 return false; 1806 } 1807 1808 public boolean dispatchContextItemSelected(MenuItem item) { 1809 if (mActive != null) { 1810 for (int i=0; i<mAdded.size(); i++) { 1811 Fragment f = mAdded.get(i); 1812 if (f != null && !f.mHidden) { 1813 if (f.onContextItemSelected(item)) { 1814 return true; 1815 } 1816 } 1817 } 1818 } 1819 return false; 1820 } 1821 1822 public void dispatchOptionsMenuClosed(Menu menu) { 1823 if (mActive != null) { 1824 for (int i=0; i<mAdded.size(); i++) { 1825 Fragment f = mAdded.get(i); 1826 if (f != null && !f.mHidden && f.mHasMenu) { 1827 f.onOptionsMenuClosed(menu); 1828 } 1829 } 1830 } 1831 } 1832 1833 public static int reverseTransit(int transit) { 1834 int rev = 0; 1835 switch (transit) { 1836 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1837 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1838 break; 1839 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1840 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1841 break; 1842 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1843 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 1844 break; 1845 } 1846 return rev; 1847 1848 } 1849 1850 public static final int ANIM_STYLE_OPEN_ENTER = 1; 1851 public static final int ANIM_STYLE_OPEN_EXIT = 2; 1852 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 1853 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 1854 public static final int ANIM_STYLE_FADE_ENTER = 5; 1855 public static final int ANIM_STYLE_FADE_EXIT = 6; 1856 1857 public static int transitToStyleIndex(int transit, boolean enter) { 1858 int animAttr = -1; 1859 switch (transit) { 1860 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1861 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 1862 break; 1863 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1864 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 1865 break; 1866 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1867 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 1868 break; 1869 } 1870 return animAttr; 1871 } 1872} 1873