FragmentManager.java revision 1199ae7067cdf8cf3eb30c057a61ae71a0aea1e5
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.support.v4.app; 18 19import android.content.Context; 20import android.content.res.Configuration; 21import android.os.Bundle; 22import android.os.Handler; 23import android.os.Looper; 24import android.os.Parcel; 25import android.os.Parcelable; 26import android.support.v4.util.DebugUtils; 27import android.support.v4.util.LogWriter; 28import android.util.Log; 29import android.util.SparseArray; 30import android.view.animation.AccelerateInterpolator; 31import android.view.animation.AlphaAnimation; 32import android.view.animation.Animation; 33import android.view.animation.AnimationSet; 34import android.view.animation.AnimationUtils; 35import android.view.animation.DecelerateInterpolator; 36import android.view.animation.Interpolator; 37import android.view.animation.ScaleAnimation; 38import android.view.animation.Animation.AnimationListener; 39import android.view.Menu; 40import android.view.MenuInflater; 41import android.view.MenuItem; 42import android.view.View; 43import android.view.ViewGroup; 44 45import java.io.FileDescriptor; 46import java.io.PrintWriter; 47import java.util.ArrayList; 48import java.util.Arrays; 49 50/** 51 * Static library support version of the framework's {@link android.app.FragmentManager}. 52 * Used to write apps that run on platforms prior to Android 3.0. When running 53 * on Android 3.0 or above, this implementation is still used; it does not try 54 * to switch to the framework's implementation. See the framework SDK 55 * documentation for a class overview. 56 * 57 * <p>Your activity must derive from {@link FragmentActivity} to use this. 58 */ 59public abstract class FragmentManager { 60 /** 61 * Representation of an entry on the fragment back stack, as created 62 * with {@link FragmentTransaction#addToBackStack(String) 63 * FragmentTransaction.addToBackStack()}. Entries can later be 64 * retrieved with {@link FragmentManager#getBackStackEntryAt(int) 65 * FragmentManager.getBackStackEntry()}. 66 * 67 * <p>Note that you should never hold on to a BackStackEntry object; 68 * the identifier as returned by {@link #getId} is the only thing that 69 * will be persisted across activity instances. 70 */ 71 public interface BackStackEntry { 72 /** 73 * Return the unique identifier for the entry. This is the only 74 * representation of the entry that will persist across activity 75 * instances. 76 */ 77 public int getId(); 78 79 /** 80 * Get the name that was supplied to 81 * {@link FragmentTransaction#addToBackStack(String) 82 * FragmentTransaction.addToBackStack(String)} when creating this entry. 83 */ 84 public String getName(); 85 86 /** 87 * Return the full bread crumb title resource identifier for the entry, 88 * or 0 if it does not have one. 89 */ 90 public int getBreadCrumbTitleRes(); 91 92 /** 93 * Return the short bread crumb title resource identifier for the entry, 94 * or 0 if it does not have one. 95 */ 96 public int getBreadCrumbShortTitleRes(); 97 98 /** 99 * Return the full bread crumb title for the entry, or null if it 100 * does not have one. 101 */ 102 public CharSequence getBreadCrumbTitle(); 103 104 /** 105 * Return the short bread crumb title for the entry, or null if it 106 * does not have one. 107 */ 108 public CharSequence getBreadCrumbShortTitle(); 109 } 110 111 /** 112 * Interface to watch for changes to the back stack. 113 */ 114 public interface OnBackStackChangedListener { 115 /** 116 * Called whenever the contents of the back stack change. 117 */ 118 public void onBackStackChanged(); 119 } 120 121 /** 122 * Start a series of edit operations on the Fragments associated with 123 * this FragmentManager. 124 * 125 * <p>Note: A fragment transaction can only be created/committed prior 126 * to an activity saving its state. If you try to commit a transaction 127 * after {@link FragmentActivity#onSaveInstanceState FragmentActivity.onSaveInstanceState()} 128 * (and prior to a following {@link FragmentActivity#onStart FragmentActivity.onStart} 129 * or {@link FragmentActivity#onResume FragmentActivity.onResume()}, you will get an error. 130 * This is because the framework takes care of saving your current fragments 131 * in the state, and if changes are made after the state is saved then they 132 * will be lost.</p> 133 */ 134 public abstract FragmentTransaction beginTransaction(); 135 136 /** @hide -- remove once prebuilts are in. */ 137 @Deprecated 138 public FragmentTransaction openTransaction() { 139 return beginTransaction(); 140 } 141 142 /** 143 * After a {@link FragmentTransaction} is committed with 144 * {@link FragmentTransaction#commit FragmentTransaction.commit()}, it 145 * is scheduled to be executed asynchronously on the process's main thread. 146 * If you want to immediately executing any such pending operations, you 147 * can call this function (only from the main thread) to do so. Note that 148 * all callbacks and other related behavior will be done from within this 149 * call, so be careful about where this is called from. 150 * 151 * @return Returns true if there were any pending transactions to be 152 * executed. 153 */ 154 public abstract boolean executePendingTransactions(); 155 156 /** 157 * Finds a fragment that was identified by the given id either when inflated 158 * from XML or as the container ID when added in a transaction. This first 159 * searches through fragments that are currently added to the manager's 160 * activity; if no such fragment is found, then all fragments currently 161 * on the back stack associated with this ID are searched. 162 * @return The fragment if found or null otherwise. 163 */ 164 public abstract Fragment findFragmentById(int id); 165 166 /** 167 * Finds a fragment that was identified by the given tag either when inflated 168 * from XML or as supplied when added in a transaction. This first 169 * searches through fragments that are currently added to the manager's 170 * activity; if no such fragment is found, then all fragments currently 171 * on the back stack are searched. 172 * @return The fragment if found or null otherwise. 173 */ 174 public abstract Fragment findFragmentByTag(String tag); 175 176 /** 177 * Flag for {@link #popBackStack(String, int)} 178 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 179 * a back stack entry has been supplied, then all matching entries will 180 * be consumed until one that doesn't match is found or the bottom of 181 * the stack is reached. Otherwise, all entries up to but not including that entry 182 * will be removed. 183 */ 184 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 185 186 /** 187 * Pop the top state off the back stack. Returns true if there was one 188 * to pop, else false. 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 public abstract void popBackStack(); 193 194 /** 195 * Like {@link #popBackStack()}, but performs the operation immediately 196 * inside of the call. This is like calling {@link #executePendingTransactions()} 197 * afterwards. 198 * @return Returns true if there was something popped, else false. 199 */ 200 public abstract boolean popBackStackImmediate(); 201 202 /** 203 * Pop the last fragment transition from the manager's fragment 204 * back stack. If there is nothing to pop, false is returned. 205 * This function is asynchronous -- it enqueues the 206 * request to pop, but the action will not be performed until the application 207 * returns to its event loop. 208 * 209 * @param name If non-null, this is the name of a previous back state 210 * to look for; if found, all states up to that state will be popped. The 211 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 212 * the named state itself is popped. If null, only the top state is popped. 213 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 214 */ 215 public abstract void popBackStack(String name, int flags); 216 217 /** 218 * Like {@link #popBackStack(String, int)}, but performs the operation immediately 219 * inside of the call. This is like calling {@link #executePendingTransactions()} 220 * afterwards. 221 * @return Returns true if there was something popped, else false. 222 */ 223 public abstract boolean popBackStackImmediate(String name, int flags); 224 225 /** 226 * Pop all back stack states up to the one with the given identifier. 227 * This function is asynchronous -- it enqueues the 228 * request to pop, but the action will not be performed until the application 229 * returns to its event loop. 230 * 231 * @param id Identifier of the stated to be popped. If no identifier exists, 232 * false is returned. 233 * The identifier is the number returned by 234 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 235 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 236 * the named state itself is popped. 237 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 238 */ 239 public abstract void popBackStack(int id, int flags); 240 241 /** 242 * Like {@link #popBackStack(int, int)}, but performs the operation immediately 243 * inside of the call. This is like calling {@link #executePendingTransactions()} 244 * afterwards. 245 * @return Returns true if there was something popped, else false. 246 */ 247 public abstract boolean popBackStackImmediate(int id, int flags); 248 249 /** 250 * Return the number of entries currently in the back stack. 251 */ 252 public abstract int getBackStackEntryCount(); 253 254 /** 255 * Return the BackStackEntry at index <var>index</var> in the back stack; 256 * entries start index 0 being the bottom of the stack. 257 */ 258 public abstract BackStackEntry getBackStackEntryAt(int index); 259 260 /** 261 * Add a new listener for changes to the fragment back stack. 262 */ 263 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 264 265 /** 266 * Remove a listener that was previously added with 267 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 268 */ 269 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 270 271 /** 272 * Put a reference to a fragment in a Bundle. This Bundle can be 273 * persisted as saved state, and when later restoring 274 * {@link #getFragment(Bundle, String)} will return the current 275 * instance of the same fragment. 276 * 277 * @param bundle The bundle in which to put the fragment reference. 278 * @param key The name of the entry in the bundle. 279 * @param fragment The Fragment whose reference is to be stored. 280 */ 281 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 282 283 /** 284 * Retrieve the current Fragment instance for a reference previously 285 * placed with {@link #putFragment(Bundle, String, Fragment)}. 286 * 287 * @param bundle The bundle from which to retrieve the fragment reference. 288 * @param key The name of the entry in the bundle. 289 * @return Returns the current Fragment instance that is associated with 290 * the given reference. 291 */ 292 public abstract Fragment getFragment(Bundle bundle, String key); 293 294 /** 295 * Save the current instance state of the given Fragment. This can be 296 * used later when creating a new instance of the Fragment and adding 297 * it to the fragment manager, to have it create itself to match the 298 * current state returned here. Note that there are limits on how 299 * this can be used: 300 * 301 * <ul> 302 * <li>The Fragment must currently be attached to the FragmentManager. 303 * <li>A new Fragment created using this saved state must be the same class 304 * type as the Fragment it was created from. 305 * <li>The saved state can not contain dependencies on other fragments -- 306 * that is it can't use {@link #putFragment(Bundle, String, Fragment)} to 307 * store a fragment reference because that reference may not be valid when 308 * this saved state is later used. Likewise the Fragment's target and 309 * result code are not included in this state. 310 * </ul> 311 * 312 * @param f The Fragment whose state is to be saved. 313 * @return The generated state. This will be null if there was no 314 * interesting state created by the fragment. 315 */ 316 public abstract Fragment.SavedState saveFragmentInstanceState(Fragment f); 317 318 /** 319 * Print the FragmentManager's state into the given stream. 320 * 321 * @param prefix Text to print at the front of each line. 322 * @param fd The raw file descriptor that the dump is being sent to. 323 * @param writer A PrintWriter to which the dump is to be set. 324 * @param args Additional arguments to the dump request. 325 */ 326 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 327 328 /** 329 * Control whether the framework's internal fragment manager debugging 330 * logs are turned on. If enabled, you will see output in logcat as 331 * the framework performs fragment operations. 332 */ 333 public static void enableDebugLogging(boolean enabled) { 334 FragmentManagerImpl.DEBUG = enabled; 335 } 336} 337 338final class FragmentManagerState implements Parcelable { 339 FragmentState[] mActive; 340 int[] mAdded; 341 BackStackState[] mBackStack; 342 343 public FragmentManagerState() { 344 } 345 346 public FragmentManagerState(Parcel in) { 347 mActive = in.createTypedArray(FragmentState.CREATOR); 348 mAdded = in.createIntArray(); 349 mBackStack = in.createTypedArray(BackStackState.CREATOR); 350 } 351 352 public int describeContents() { 353 return 0; 354 } 355 356 public void writeToParcel(Parcel dest, int flags) { 357 dest.writeTypedArray(mActive, flags); 358 dest.writeIntArray(mAdded); 359 dest.writeTypedArray(mBackStack, flags); 360 } 361 362 public static final Parcelable.Creator<FragmentManagerState> CREATOR 363 = new Parcelable.Creator<FragmentManagerState>() { 364 public FragmentManagerState createFromParcel(Parcel in) { 365 return new FragmentManagerState(in); 366 } 367 368 public FragmentManagerState[] newArray(int size) { 369 return new FragmentManagerState[size]; 370 } 371 }; 372} 373 374/** 375 * Container for fragments associated with an activity. 376 */ 377final class FragmentManagerImpl extends FragmentManager { 378 static boolean DEBUG = false; 379 static final String TAG = "FragmentManager"; 380 381 static final boolean HONEYCOMB = android.os.Build.VERSION.SDK_INT >= 11; 382 383 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 384 static final String TARGET_STATE_TAG = "android:target_state"; 385 static final String VIEW_STATE_TAG = "android:view_state"; 386 387 ArrayList<Runnable> mPendingActions; 388 Runnable[] mTmpActions; 389 boolean mExecutingActions; 390 391 ArrayList<Fragment> mActive; 392 ArrayList<Fragment> mAdded; 393 ArrayList<Integer> mAvailIndices; 394 ArrayList<BackStackRecord> mBackStack; 395 ArrayList<Fragment> mCreatedMenus; 396 397 // Must be accessed while locked. 398 ArrayList<BackStackRecord> mBackStackIndices; 399 ArrayList<Integer> mAvailBackStackIndices; 400 401 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 402 403 int mCurState = Fragment.INITIALIZING; 404 FragmentActivity mActivity; 405 406 boolean mNeedMenuInvalidate; 407 boolean mStateSaved; 408 boolean mDestroyed; 409 String mNoTransactionsBecause; 410 411 // Temporary vars for state save and restore. 412 Bundle mStateBundle = null; 413 SparseArray<Parcelable> mStateArray = null; 414 415 Runnable mExecCommit = new Runnable() { 416 @Override 417 public void run() { 418 execPendingActions(); 419 } 420 }; 421 422 @Override 423 public FragmentTransaction beginTransaction() { 424 return new BackStackRecord(this); 425 } 426 427 @Override 428 public boolean executePendingTransactions() { 429 return execPendingActions(); 430 } 431 432 @Override 433 public void popBackStack() { 434 enqueueAction(new Runnable() { 435 @Override public void run() { 436 popBackStackState(mActivity.mHandler, null, -1, 0); 437 } 438 }, false); 439 } 440 441 @Override 442 public boolean popBackStackImmediate() { 443 checkStateLoss(); 444 executePendingTransactions(); 445 return popBackStackState(mActivity.mHandler, null, -1, 0); 446 } 447 448 @Override 449 public void popBackStack(final String name, final int flags) { 450 enqueueAction(new Runnable() { 451 @Override public void run() { 452 popBackStackState(mActivity.mHandler, name, -1, flags); 453 } 454 }, false); 455 } 456 457 @Override 458 public boolean popBackStackImmediate(String name, int flags) { 459 checkStateLoss(); 460 executePendingTransactions(); 461 return popBackStackState(mActivity.mHandler, name, -1, flags); 462 } 463 464 @Override 465 public void popBackStack(final int id, final int flags) { 466 if (id < 0) { 467 throw new IllegalArgumentException("Bad id: " + id); 468 } 469 enqueueAction(new Runnable() { 470 @Override public void run() { 471 popBackStackState(mActivity.mHandler, null, id, flags); 472 } 473 }, false); 474 } 475 476 @Override 477 public boolean popBackStackImmediate(int id, int flags) { 478 checkStateLoss(); 479 executePendingTransactions(); 480 if (id < 0) { 481 throw new IllegalArgumentException("Bad id: " + id); 482 } 483 return popBackStackState(mActivity.mHandler, null, id, flags); 484 } 485 486 @Override 487 public int getBackStackEntryCount() { 488 return mBackStack != null ? mBackStack.size() : 0; 489 } 490 491 @Override 492 public BackStackEntry getBackStackEntryAt(int index) { 493 return mBackStack.get(index); 494 } 495 496 @Override 497 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 498 if (mBackStackChangeListeners == null) { 499 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 500 } 501 mBackStackChangeListeners.add(listener); 502 } 503 504 @Override 505 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 506 if (mBackStackChangeListeners != null) { 507 mBackStackChangeListeners.remove(listener); 508 } 509 } 510 511 @Override 512 public void putFragment(Bundle bundle, String key, Fragment fragment) { 513 if (fragment.mIndex < 0) { 514 throw new IllegalStateException("Fragment " + fragment 515 + " is not currently in the FragmentManager"); 516 } 517 bundle.putInt(key, fragment.mIndex); 518 } 519 520 @Override 521 public Fragment getFragment(Bundle bundle, String key) { 522 int index = bundle.getInt(key, -1); 523 if (index == -1) { 524 return null; 525 } 526 if (index >= mActive.size()) { 527 throw new IllegalStateException("Fragement no longer exists for key " 528 + key + ": index " + index); 529 } 530 Fragment f = mActive.get(index); 531 if (f == null) { 532 throw new IllegalStateException("Fragement no longer exists for key " 533 + key + ": index " + index); 534 } 535 return f; 536 } 537 538 @Override 539 public Fragment.SavedState saveFragmentInstanceState(Fragment fragment) { 540 if (fragment.mIndex < 0) { 541 throw new IllegalStateException("Fragment " + fragment 542 + " is not currently in the FragmentManager"); 543 } 544 if (fragment.mState > Fragment.INITIALIZING) { 545 Bundle result = saveFragmentBasicState(fragment); 546 return result != null ? new Fragment.SavedState(result) : null; 547 } 548 return null; 549 } 550 551 @Override 552 public String toString() { 553 StringBuilder sb = new StringBuilder(128); 554 sb.append("FragmentManager{"); 555 sb.append(Integer.toHexString(System.identityHashCode(this))); 556 sb.append(" in "); 557 DebugUtils.buildShortClassTag(mActivity, sb); 558 sb.append("}}"); 559 return sb.toString(); 560 } 561 562 @Override 563 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 564 String innerPrefix = prefix + " "; 565 566 int N; 567 if (mActive != null) { 568 N = mActive.size(); 569 if (N > 0) { 570 writer.print(prefix); writer.print("Active Fragments in "); 571 writer.print(Integer.toHexString(System.identityHashCode(this))); 572 writer.println(":"); 573 for (int i=0; i<N; i++) { 574 Fragment f = mActive.get(i); 575 writer.print(prefix); writer.print(" #"); writer.print(i); 576 writer.print(": "); writer.println(f); 577 if (f != null) { 578 f.dump(innerPrefix, fd, writer, args); 579 } 580 } 581 } 582 } 583 584 if (mAdded != null) { 585 N = mAdded.size(); 586 if (N > 0) { 587 writer.print(prefix); writer.println("Added Fragments:"); 588 for (int i=0; i<N; i++) { 589 Fragment f = mAdded.get(i); 590 writer.print(prefix); writer.print(" #"); writer.print(i); 591 writer.print(": "); writer.println(f.toString()); 592 } 593 } 594 } 595 596 if (mCreatedMenus != null) { 597 N = mCreatedMenus.size(); 598 if (N > 0) { 599 writer.print(prefix); writer.println("Fragments Created Menus:"); 600 for (int i=0; i<N; i++) { 601 Fragment f = mCreatedMenus.get(i); 602 writer.print(prefix); writer.print(" #"); writer.print(i); 603 writer.print(": "); writer.println(f.toString()); 604 } 605 } 606 } 607 608 if (mBackStack != null) { 609 N = mBackStack.size(); 610 if (N > 0) { 611 writer.print(prefix); writer.println("Back Stack:"); 612 for (int i=0; i<N; i++) { 613 BackStackRecord bs = mBackStack.get(i); 614 writer.print(prefix); writer.print(" #"); writer.print(i); 615 writer.print(": "); writer.println(bs.toString()); 616 bs.dump(innerPrefix, fd, writer, args); 617 } 618 } 619 } 620 621 synchronized (this) { 622 if (mBackStackIndices != null) { 623 N = mBackStackIndices.size(); 624 if (N > 0) { 625 writer.print(prefix); writer.println("Back Stack Indices:"); 626 for (int i=0; i<N; i++) { 627 BackStackRecord bs = mBackStackIndices.get(i); 628 writer.print(prefix); writer.print(" #"); writer.print(i); 629 writer.print(": "); writer.println(bs); 630 } 631 } 632 } 633 634 if (mAvailBackStackIndices != null && mAvailBackStackIndices.size() > 0) { 635 writer.print(prefix); writer.print("mAvailBackStackIndices: "); 636 writer.println(Arrays.toString(mAvailBackStackIndices.toArray())); 637 } 638 } 639 640 if (mPendingActions != null) { 641 N = mPendingActions.size(); 642 if (N > 0) { 643 writer.print(prefix); writer.println("Pending Actions:"); 644 for (int i=0; i<N; i++) { 645 Runnable r = mPendingActions.get(i); 646 writer.print(prefix); writer.print(" #"); writer.print(i); 647 writer.print(": "); writer.println(r); 648 } 649 } 650 } 651 652 writer.print(prefix); writer.println("FragmentManager misc state:"); 653 writer.print(prefix); writer.print(" mCurState="); writer.print(mCurState); 654 writer.print(" mStateSaved="); writer.print(mStateSaved); 655 writer.print(" mDestroyed="); writer.println(mDestroyed); 656 if (mNeedMenuInvalidate) { 657 writer.print(prefix); writer.print(" mNeedMenuInvalidate="); 658 writer.println(mNeedMenuInvalidate); 659 } 660 if (mNoTransactionsBecause != null) { 661 writer.print(prefix); writer.print(" mNoTransactionsBecause="); 662 writer.println(mNoTransactionsBecause); 663 } 664 if (mAvailIndices != null && mAvailIndices.size() > 0) { 665 writer.print(prefix); writer.print(" mAvailIndices: "); 666 writer.println(Arrays.toString(mAvailIndices.toArray())); 667 } 668 } 669 670 static final Interpolator DECELERATE_QUINT = new DecelerateInterpolator(2.5f); 671 static final Interpolator DECELERATE_CUBIC = new DecelerateInterpolator(1.5f); 672 static final Interpolator ACCELERATE_QUINT = new AccelerateInterpolator(2.5f); 673 static final Interpolator ACCELERATE_CUBIC = new AccelerateInterpolator(1.5f); 674 675 static final int ANIM_DUR = 220; 676 677 static Animation makeOpenCloseAnimation(Context context, float startScale, 678 float endScale, float startAlpha, float endAlpha) { 679 AnimationSet set = new AnimationSet(false); 680 ScaleAnimation scale = new ScaleAnimation(startScale, endScale, startScale, endScale, 681 Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f); 682 scale.setInterpolator(DECELERATE_QUINT); 683 scale.setDuration(ANIM_DUR); 684 set.addAnimation(scale); 685 AlphaAnimation alpha = new AlphaAnimation(startAlpha, endAlpha); 686 alpha.setInterpolator(DECELERATE_CUBIC); 687 alpha.setDuration(ANIM_DUR); 688 set.addAnimation(alpha); 689 return set; 690 } 691 692 static Animation makeFadeAnimation(Context context, float start, float end) { 693 AlphaAnimation anim = new AlphaAnimation(start, end); 694 anim.setInterpolator(DECELERATE_CUBIC); 695 anim.setDuration(ANIM_DUR); 696 return anim; 697 } 698 699 Animation loadAnimation(Fragment fragment, int transit, boolean enter, 700 int transitionStyle) { 701 Animation animObj = fragment.onCreateAnimation(transit, enter, 702 fragment.mNextAnim); 703 if (animObj != null) { 704 return animObj; 705 } 706 707 if (fragment.mNextAnim != 0) { 708 Animation anim = AnimationUtils.loadAnimation(mActivity, fragment.mNextAnim); 709 if (anim != null) { 710 return anim; 711 } 712 } 713 714 if (transit == 0) { 715 return null; 716 } 717 718 int styleIndex = transitToStyleIndex(transit, enter); 719 if (styleIndex < 0) { 720 return null; 721 } 722 723 switch (styleIndex) { 724 case ANIM_STYLE_OPEN_ENTER: 725 return makeOpenCloseAnimation(mActivity, 1.125f, 1.0f, 0, 1); 726 case ANIM_STYLE_OPEN_EXIT: 727 return makeOpenCloseAnimation(mActivity, 1.0f, .975f, 1, 0); 728 case ANIM_STYLE_CLOSE_ENTER: 729 return makeOpenCloseAnimation(mActivity, .975f, 1.0f, 0, 1); 730 case ANIM_STYLE_CLOSE_EXIT: 731 return makeOpenCloseAnimation(mActivity, 1.0f, 1.075f, 1, 0); 732 case ANIM_STYLE_FADE_ENTER: 733 return makeFadeAnimation(mActivity, 0, 1); 734 case ANIM_STYLE_FADE_EXIT: 735 return makeFadeAnimation(mActivity, 1, 0); 736 } 737 738 if (transitionStyle == 0 && mActivity.getWindow() != null) { 739 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 740 } 741 if (transitionStyle == 0) { 742 return null; 743 } 744 745 //TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 746 // com.android.internal.R.styleable.FragmentAnimation); 747 //int anim = attrs.getResourceId(styleIndex, 0); 748 //attrs.recycle(); 749 750 //if (anim == 0) { 751 // return null; 752 //} 753 754 //return AnimatorInflater.loadAnimator(mActivity, anim); 755 return null; 756 } 757 758 public void performPendingDeferredStart(Fragment f) { 759 if (f.mDeferStart) { 760 f.mDeferStart = false; 761 moveToState(f, mCurState, 0, 0); 762 } 763 } 764 765 void moveToState(Fragment f, int newState, int transit, int transitionStyle) { 766 // Fragments that are not currently added will sit in the onCreate() state. 767 if (!f.mAdded && newState > Fragment.CREATED) { 768 newState = Fragment.CREATED; 769 } 770 if (f.mRemoving && newState > f.mState) { 771 // While removing a fragment, we can't change it to a higher state. 772 newState = f.mState; 773 } 774 // Defer start if the fragment has requested it 775 if (f.mDeferStart && newState > Fragment.STOPPED) { 776 newState = Fragment.STOPPED; 777 } 778 779 if (f.mState < newState) { 780 // For fragments that are created from a layout, when restoring from 781 // state we don't want to allow them to be created until they are 782 // being reloaded from the layout. 783 if (f.mFromLayout && !f.mInLayout) { 784 return; 785 } 786 if (f.mAnimatingAway != null) { 787 // The fragment is currently being animated... but! Now we 788 // want to move our state back up. Give up on waiting for the 789 // animation, move to whatever the final state should be once 790 // the animation is done, and then we can proceed from there. 791 f.mAnimatingAway = null; 792 moveToState(f, f.mStateAfterAnimating, 0, 0); 793 } 794 switch (f.mState) { 795 case Fragment.INITIALIZING: 796 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 797 if (f.mSavedFragmentState != null) { 798 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 799 FragmentManagerImpl.VIEW_STATE_TAG); 800 f.mTarget = getFragment(f.mSavedFragmentState, 801 FragmentManagerImpl.TARGET_STATE_TAG); 802 if (f.mTarget != null) { 803 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 804 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 805 } 806 } 807 f.mActivity = mActivity; 808 f.mFragmentManager = mActivity.mFragments; 809 f.mCalled = false; 810 f.onAttach(mActivity); 811 if (!f.mCalled) { 812 throw new SuperNotCalledException("Fragment " + f 813 + " did not call through to super.onAttach()"); 814 } 815 mActivity.onAttachFragment(f); 816 817 if (!f.mRetaining) { 818 f.mCalled = false; 819 f.onCreate(f.mSavedFragmentState); 820 if (!f.mCalled) { 821 throw new SuperNotCalledException("Fragment " + f 822 + " did not call through to super.onCreate()"); 823 } 824 } 825 f.mRetaining = false; 826 if (f.mFromLayout) { 827 // For fragments that are part of the content view 828 // layout, we need to instantiate the view immediately 829 // and the inflater will take care of adding it. 830 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 831 null, f.mSavedFragmentState); 832 if (f.mView != null) { 833 f.mInnerView = f.mView; 834 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 835 if (f.mHidden) f.mView.setVisibility(View.GONE); 836 f.onViewCreated(f.mView, f.mSavedFragmentState); 837 } else { 838 f.mInnerView = null; 839 } 840 } 841 case Fragment.CREATED: 842 if (newState > Fragment.CREATED) { 843 if (DEBUG) Log.v(TAG, "moveto ACTIVITY_CREATED: " + f); 844 if (!f.mFromLayout) { 845 ViewGroup container = null; 846 if (f.mContainerId != 0) { 847 container = (ViewGroup)mActivity.findViewById(f.mContainerId); 848 if (container == null && !f.mRestored) { 849 throw new IllegalArgumentException("No view found for id 0x" 850 + Integer.toHexString(f.mContainerId) 851 + " for fragment " + f); 852 } 853 } 854 f.mContainer = container; 855 f.mView = f.onCreateView(f.getLayoutInflater(f.mSavedFragmentState), 856 container, f.mSavedFragmentState); 857 if (f.mView != null) { 858 f.mInnerView = f.mView; 859 f.mView = NoSaveStateFrameLayout.wrap(f.mView); 860 if (container != null) { 861 Animation anim = loadAnimation(f, transit, true, 862 transitionStyle); 863 if (anim != null) { 864 f.mView.startAnimation(anim); 865 } 866 container.addView(f.mView); 867 } 868 if (f.mHidden) f.mView.setVisibility(View.GONE); 869 f.onViewCreated(f.mView, f.mSavedFragmentState); 870 } else { 871 f.mInnerView = null; 872 } 873 } 874 875 f.mCalled = false; 876 f.onActivityCreated(f.mSavedFragmentState); 877 if (!f.mCalled) { 878 throw new SuperNotCalledException("Fragment " + f 879 + " did not call through to super.onActivityCreated()"); 880 } 881 if (f.mView != null) { 882 f.restoreViewState(); 883 } 884 f.mSavedFragmentState = null; 885 } 886 case Fragment.ACTIVITY_CREATED: 887 case Fragment.STOPPED: 888 if (newState > Fragment.STOPPED) { 889 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 890 f.mCalled = false; 891 f.performStart(); 892 if (!f.mCalled) { 893 throw new SuperNotCalledException("Fragment " + f 894 + " did not call through to super.onStart()"); 895 } 896 } 897 case Fragment.STARTED: 898 if (newState > Fragment.STARTED) { 899 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 900 f.mCalled = false; 901 f.mResumed = true; 902 f.onResume(); 903 if (!f.mCalled) { 904 throw new SuperNotCalledException("Fragment " + f 905 + " did not call through to super.onResume()"); 906 } 907 f.mSavedFragmentState = null; 908 f.mSavedViewState = null; 909 } 910 } 911 } else if (f.mState > newState) { 912 switch (f.mState) { 913 case Fragment.RESUMED: 914 if (newState < Fragment.RESUMED) { 915 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 916 f.mCalled = false; 917 f.onPause(); 918 if (!f.mCalled) { 919 throw new SuperNotCalledException("Fragment " + f 920 + " did not call through to super.onPause()"); 921 } 922 f.mResumed = false; 923 } 924 case Fragment.STARTED: 925 if (newState < Fragment.STARTED) { 926 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 927 f.mCalled = false; 928 f.performStop(); 929 if (!f.mCalled) { 930 throw new SuperNotCalledException("Fragment " + f 931 + " did not call through to super.onStop()"); 932 } 933 } 934 case Fragment.STOPPED: 935 if (newState < Fragment.STOPPED) { 936 if (DEBUG) Log.v(TAG, "movefrom STOPPED: " + f); 937 f.performReallyStop(); 938 } 939 case Fragment.ACTIVITY_CREATED: 940 if (newState < Fragment.ACTIVITY_CREATED) { 941 if (DEBUG) Log.v(TAG, "movefrom ACTIVITY_CREATED: " + f); 942 if (f.mView != null) { 943 // Need to save the current view state if not 944 // done already. 945 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 946 saveFragmentViewState(f); 947 } 948 } 949 f.mCalled = false; 950 f.performDestroyView(); 951 if (!f.mCalled) { 952 throw new SuperNotCalledException("Fragment " + f 953 + " did not call through to super.onDestroyView()"); 954 } 955 if (f.mView != null && f.mContainer != null) { 956 Animation anim = null; 957 if (mCurState > Fragment.INITIALIZING && !mDestroyed) { 958 anim = loadAnimation(f, transit, false, 959 transitionStyle); 960 } 961 if (anim != null) { 962 final Fragment fragment = f; 963 f.mAnimatingAway = f.mView; 964 f.mStateAfterAnimating = newState; 965 anim.setAnimationListener(new AnimationListener() { 966 @Override 967 public void onAnimationEnd(Animation animation) { 968 if (fragment.mAnimatingAway != null) { 969 fragment.mAnimatingAway = null; 970 moveToState(fragment, fragment.mStateAfterAnimating, 971 0, 0); 972 } 973 } 974 @Override 975 public void onAnimationRepeat(Animation animation) { 976 } 977 @Override 978 public void onAnimationStart(Animation animation) { 979 } 980 }); 981 f.mView.startAnimation(anim); 982 } 983 f.mContainer.removeView(f.mView); 984 } 985 f.mContainer = null; 986 f.mView = null; 987 f.mInnerView = null; 988 } 989 case Fragment.CREATED: 990 if (newState < Fragment.CREATED) { 991 if (mDestroyed) { 992 if (f.mAnimatingAway != null) { 993 // The fragment's containing activity is 994 // being destroyed, but this fragment is 995 // currently animating away. Stop the 996 // animation right now -- it is not needed, 997 // and we can't wait any more on destroying 998 // the fragment. 999 View v = f.mAnimatingAway; 1000 f.mAnimatingAway = null; 1001 v.clearAnimation(); 1002 } 1003 } 1004 if (f.mAnimatingAway != null) { 1005 // We are waiting for the fragment's view to finish 1006 // animating away. Just make a note of the state 1007 // the fragment now should move to once the animation 1008 // is done. 1009 f.mStateAfterAnimating = newState; 1010 newState = Fragment.CREATED; 1011 } else { 1012 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 1013 if (!f.mRetaining) { 1014 f.mCalled = false; 1015 f.onDestroy(); 1016 if (!f.mCalled) { 1017 throw new SuperNotCalledException("Fragment " + f 1018 + " did not call through to super.onDestroy()"); 1019 } 1020 } 1021 1022 f.mCalled = false; 1023 f.onDetach(); 1024 if (!f.mCalled) { 1025 throw new SuperNotCalledException("Fragment " + f 1026 + " did not call through to super.onDetach()"); 1027 } 1028 if (!f.mRetaining) { 1029 makeInactive(f); 1030 } else { 1031 f.mActivity = null; 1032 f.mFragmentManager = null; 1033 } 1034 } 1035 } 1036 } 1037 } 1038 1039 f.mState = newState; 1040 } 1041 1042 void moveToState(Fragment f) { 1043 moveToState(f, mCurState, 0, 0); 1044 } 1045 1046 void moveToState(int newState, boolean always) { 1047 moveToState(newState, 0, 0, always); 1048 } 1049 1050 void moveToState(int newState, int transit, int transitStyle, boolean always) { 1051 if (mActivity == null && newState != Fragment.INITIALIZING) { 1052 throw new IllegalStateException("No activity"); 1053 } 1054 1055 if (!always && mCurState == newState) { 1056 return; 1057 } 1058 1059 mCurState = newState; 1060 if (mActive != null) { 1061 boolean loadersRunning = false; 1062 for (int i=0; i<mActive.size(); i++) { 1063 Fragment f = mActive.get(i); 1064 if (f != null) { 1065 moveToState(f, newState, transit, transitStyle); 1066 if (f.mLoaderManager != null) { 1067 loadersRunning |= f.mLoaderManager.hasRunningLoaders(); 1068 } 1069 } 1070 } 1071 1072 if (!loadersRunning) { 1073 startPendingDeferredFragments(); 1074 } 1075 1076 if (mNeedMenuInvalidate && mActivity != null && mCurState == Fragment.RESUMED) { 1077 mActivity.supportInvalidateOptionsMenu(); 1078 mNeedMenuInvalidate = false; 1079 } 1080 } 1081 } 1082 1083 void startPendingDeferredFragments() { 1084 if (mActive == null) return; 1085 1086 for (int i=0; i<mActive.size(); i++) { 1087 Fragment f = mActive.get(i); 1088 if (f != null) { 1089 performPendingDeferredStart(f); 1090 } 1091 } 1092 } 1093 1094 void makeActive(Fragment f) { 1095 if (f.mIndex >= 0) { 1096 return; 1097 } 1098 1099 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 1100 if (mActive == null) { 1101 mActive = new ArrayList<Fragment>(); 1102 } 1103 f.setIndex(mActive.size()); 1104 mActive.add(f); 1105 1106 } else { 1107 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1)); 1108 mActive.set(f.mIndex, f); 1109 } 1110 } 1111 1112 void makeInactive(Fragment f) { 1113 if (f.mIndex < 0) { 1114 return; 1115 } 1116 1117 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f.mIndex); 1118 mActive.set(f.mIndex, null); 1119 if (mAvailIndices == null) { 1120 mAvailIndices = new ArrayList<Integer>(); 1121 } 1122 mAvailIndices.add(f.mIndex); 1123 mActivity.invalidateSupportFragmentIndex(f.mIndex); 1124 f.initState(); 1125 } 1126 1127 public void addFragment(Fragment fragment, boolean moveToStateNow) { 1128 if (mAdded == null) { 1129 mAdded = new ArrayList<Fragment>(); 1130 } 1131 if (DEBUG) Log.v(TAG, "add: " + fragment); 1132 makeActive(fragment); 1133 if (!fragment.mDetached) { 1134 mAdded.add(fragment); 1135 fragment.mAdded = true; 1136 fragment.mRemoving = false; 1137 if (fragment.mHasMenu && fragment.mMenuVisible) { 1138 mNeedMenuInvalidate = true; 1139 } 1140 if (moveToStateNow) { 1141 moveToState(fragment); 1142 } 1143 } 1144 } 1145 1146 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 1147 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 1148 final boolean inactive = !fragment.isInBackStack(); 1149 if (!fragment.mDetached || inactive) { 1150 mAdded.remove(fragment); 1151 if (fragment.mHasMenu && fragment.mMenuVisible) { 1152 mNeedMenuInvalidate = true; 1153 } 1154 fragment.mAdded = false; 1155 fragment.mRemoving = true; 1156 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 1157 transition, transitionStyle); 1158 } 1159 } 1160 1161 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 1162 if (DEBUG) Log.v(TAG, "hide: " + fragment); 1163 if (!fragment.mHidden) { 1164 fragment.mHidden = true; 1165 if (fragment.mView != null) { 1166 Animation anim = loadAnimation(fragment, transition, true, 1167 transitionStyle); 1168 if (anim != null) { 1169 fragment.mView.startAnimation(anim); 1170 } 1171 fragment.mView.setVisibility(View.GONE); 1172 } 1173 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1174 mNeedMenuInvalidate = true; 1175 } 1176 fragment.onHiddenChanged(true); 1177 } 1178 } 1179 1180 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 1181 if (DEBUG) Log.v(TAG, "show: " + fragment); 1182 if (fragment.mHidden) { 1183 fragment.mHidden = false; 1184 if (fragment.mView != null) { 1185 Animation anim = loadAnimation(fragment, transition, true, 1186 transitionStyle); 1187 if (anim != null) { 1188 fragment.mView.startAnimation(anim); 1189 } 1190 fragment.mView.setVisibility(View.VISIBLE); 1191 } 1192 if (fragment.mAdded && fragment.mHasMenu && fragment.mMenuVisible) { 1193 mNeedMenuInvalidate = true; 1194 } 1195 fragment.onHiddenChanged(false); 1196 } 1197 } 1198 1199 public void detachFragment(Fragment fragment, int transition, int transitionStyle) { 1200 if (DEBUG) Log.v(TAG, "detach: " + fragment); 1201 if (!fragment.mDetached) { 1202 fragment.mDetached = true; 1203 if (fragment.mAdded) { 1204 // We are not already in back stack, so need to remove the fragment. 1205 mAdded.remove(fragment); 1206 if (fragment.mHasMenu && fragment.mMenuVisible) { 1207 mNeedMenuInvalidate = true; 1208 } 1209 fragment.mAdded = false; 1210 moveToState(fragment, Fragment.CREATED, transition, transitionStyle); 1211 } 1212 } 1213 } 1214 1215 public void attachFragment(Fragment fragment, int transition, int transitionStyle) { 1216 if (DEBUG) Log.v(TAG, "attach: " + fragment); 1217 if (fragment.mDetached) { 1218 fragment.mDetached = false; 1219 if (!fragment.mAdded) { 1220 mAdded.add(fragment); 1221 fragment.mAdded = true; 1222 if (fragment.mHasMenu && fragment.mMenuVisible) { 1223 mNeedMenuInvalidate = true; 1224 } 1225 moveToState(fragment, mCurState, transition, transitionStyle); 1226 } 1227 } 1228 } 1229 1230 public Fragment findFragmentById(int id) { 1231 if (mActive != null) { 1232 // First look through added fragments. 1233 for (int i=mAdded.size()-1; i>=0; i--) { 1234 Fragment f = mAdded.get(i); 1235 if (f != null && f.mFragmentId == id) { 1236 return f; 1237 } 1238 } 1239 // Now for any known fragment. 1240 for (int i=mActive.size()-1; i>=0; i--) { 1241 Fragment f = mActive.get(i); 1242 if (f != null && f.mFragmentId == id) { 1243 return f; 1244 } 1245 } 1246 } 1247 return null; 1248 } 1249 1250 public Fragment findFragmentByTag(String tag) { 1251 if (mActive != null && tag != null) { 1252 // First look through added fragments. 1253 for (int i=mAdded.size()-1; i>=0; i--) { 1254 Fragment f = mAdded.get(i); 1255 if (f != null && tag.equals(f.mTag)) { 1256 return f; 1257 } 1258 } 1259 // Now for any known fragment. 1260 for (int i=mActive.size()-1; i>=0; i--) { 1261 Fragment f = mActive.get(i); 1262 if (f != null && tag.equals(f.mTag)) { 1263 return f; 1264 } 1265 } 1266 } 1267 return null; 1268 } 1269 1270 public Fragment findFragmentByWho(String who) { 1271 if (mActive != null && who != null) { 1272 for (int i=mActive.size()-1; i>=0; i--) { 1273 Fragment f = mActive.get(i); 1274 if (f != null && who.equals(f.mWho)) { 1275 return f; 1276 } 1277 } 1278 } 1279 return null; 1280 } 1281 1282 private void checkStateLoss() { 1283 if (mStateSaved) { 1284 throw new IllegalStateException( 1285 "Can not perform this action after onSaveInstanceState"); 1286 } 1287 if (mNoTransactionsBecause != null) { 1288 throw new IllegalStateException( 1289 "Can not perform this action inside of " + mNoTransactionsBecause); 1290 } 1291 } 1292 1293 public void enqueueAction(Runnable action, boolean allowStateLoss) { 1294 if (!allowStateLoss) { 1295 checkStateLoss(); 1296 } 1297 synchronized (this) { 1298 if (mActivity == null) { 1299 throw new IllegalStateException("Activity has been destroyed"); 1300 } 1301 if (mPendingActions == null) { 1302 mPendingActions = new ArrayList<Runnable>(); 1303 } 1304 mPendingActions.add(action); 1305 if (mPendingActions.size() == 1) { 1306 mActivity.mHandler.removeCallbacks(mExecCommit); 1307 mActivity.mHandler.post(mExecCommit); 1308 } 1309 } 1310 } 1311 1312 public int allocBackStackIndex(BackStackRecord bse) { 1313 synchronized (this) { 1314 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 1315 if (mBackStackIndices == null) { 1316 mBackStackIndices = new ArrayList<BackStackRecord>(); 1317 } 1318 int index = mBackStackIndices.size(); 1319 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1320 mBackStackIndices.add(bse); 1321 return index; 1322 1323 } else { 1324 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 1325 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1326 mBackStackIndices.set(index, bse); 1327 return index; 1328 } 1329 } 1330 } 1331 1332 public void setBackStackIndex(int index, BackStackRecord bse) { 1333 synchronized (this) { 1334 if (mBackStackIndices == null) { 1335 mBackStackIndices = new ArrayList<BackStackRecord>(); 1336 } 1337 int N = mBackStackIndices.size(); 1338 if (index < N) { 1339 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 1340 mBackStackIndices.set(index, bse); 1341 } else { 1342 while (N < index) { 1343 mBackStackIndices.add(null); 1344 if (mAvailBackStackIndices == null) { 1345 mAvailBackStackIndices = new ArrayList<Integer>(); 1346 } 1347 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 1348 mAvailBackStackIndices.add(N); 1349 N++; 1350 } 1351 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 1352 mBackStackIndices.add(bse); 1353 } 1354 } 1355 } 1356 1357 public void freeBackStackIndex(int index) { 1358 synchronized (this) { 1359 mBackStackIndices.set(index, null); 1360 if (mAvailBackStackIndices == null) { 1361 mAvailBackStackIndices = new ArrayList<Integer>(); 1362 } 1363 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 1364 mAvailBackStackIndices.add(index); 1365 } 1366 } 1367 1368 /** 1369 * Only call from main thread! 1370 */ 1371 public boolean execPendingActions() { 1372 if (mExecutingActions) { 1373 throw new IllegalStateException("Recursive entry to executePendingTransactions"); 1374 } 1375 1376 if (Looper.myLooper() != mActivity.mHandler.getLooper()) { 1377 throw new IllegalStateException("Must be called from main thread of process"); 1378 } 1379 1380 boolean didSomething = false; 1381 1382 while (true) { 1383 int numActions; 1384 1385 synchronized (this) { 1386 if (mPendingActions == null || mPendingActions.size() == 0) { 1387 return didSomething; 1388 } 1389 1390 numActions = mPendingActions.size(); 1391 if (mTmpActions == null || mTmpActions.length < numActions) { 1392 mTmpActions = new Runnable[numActions]; 1393 } 1394 mPendingActions.toArray(mTmpActions); 1395 mPendingActions.clear(); 1396 mActivity.mHandler.removeCallbacks(mExecCommit); 1397 } 1398 1399 mExecutingActions = true; 1400 for (int i=0; i<numActions; i++) { 1401 mTmpActions[i].run(); 1402 mTmpActions[i] = null; 1403 } 1404 mExecutingActions = false; 1405 didSomething = true; 1406 } 1407 } 1408 1409 void reportBackStackChanged() { 1410 if (mBackStackChangeListeners != null) { 1411 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 1412 mBackStackChangeListeners.get(i).onBackStackChanged(); 1413 } 1414 } 1415 } 1416 1417 void addBackStackState(BackStackRecord state) { 1418 if (mBackStack == null) { 1419 mBackStack = new ArrayList<BackStackRecord>(); 1420 } 1421 mBackStack.add(state); 1422 reportBackStackChanged(); 1423 } 1424 1425 boolean popBackStackState(Handler handler, String name, int id, int flags) { 1426 if (mBackStack == null) { 1427 return false; 1428 } 1429 if (name == null && id < 0 && (flags&POP_BACK_STACK_INCLUSIVE) == 0) { 1430 int last = mBackStack.size()-1; 1431 if (last < 0) { 1432 return false; 1433 } 1434 final BackStackRecord bss = mBackStack.remove(last); 1435 bss.popFromBackStack(true); 1436 reportBackStackChanged(); 1437 } else { 1438 int index = -1; 1439 if (name != null || id >= 0) { 1440 // If a name or ID is specified, look for that place in 1441 // the stack. 1442 index = mBackStack.size()-1; 1443 while (index >= 0) { 1444 BackStackRecord bss = mBackStack.get(index); 1445 if (name != null && name.equals(bss.getName())) { 1446 break; 1447 } 1448 if (id >= 0 && id == bss.mIndex) { 1449 break; 1450 } 1451 index--; 1452 } 1453 if (index < 0) { 1454 return false; 1455 } 1456 if ((flags&POP_BACK_STACK_INCLUSIVE) != 0) { 1457 index--; 1458 // Consume all following entries that match. 1459 while (index >= 0) { 1460 BackStackRecord bss = mBackStack.get(index); 1461 if ((name != null && name.equals(bss.getName())) 1462 || (id >= 0 && id == bss.mIndex)) { 1463 index--; 1464 continue; 1465 } 1466 break; 1467 } 1468 } 1469 } 1470 if (index == mBackStack.size()-1) { 1471 return false; 1472 } 1473 final ArrayList<BackStackRecord> states 1474 = new ArrayList<BackStackRecord>(); 1475 for (int i=mBackStack.size()-1; i>index; i--) { 1476 states.add(mBackStack.remove(i)); 1477 } 1478 final int LAST = states.size()-1; 1479 for (int i=0; i<=LAST; i++) { 1480 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1481 states.get(i).popFromBackStack(i == LAST); 1482 } 1483 reportBackStackChanged(); 1484 } 1485 return true; 1486 } 1487 1488 ArrayList<Fragment> retainNonConfig() { 1489 ArrayList<Fragment> fragments = null; 1490 if (mActive != null) { 1491 for (int i=0; i<mActive.size(); i++) { 1492 Fragment f = mActive.get(i); 1493 if (f != null && f.mRetainInstance) { 1494 if (fragments == null) { 1495 fragments = new ArrayList<Fragment>(); 1496 } 1497 fragments.add(f); 1498 f.mRetaining = true; 1499 f.mTargetIndex = f.mTarget != null ? f.mTarget.mIndex : -1; 1500 } 1501 } 1502 } 1503 return fragments; 1504 } 1505 1506 void saveFragmentViewState(Fragment f) { 1507 if (f.mInnerView == null) { 1508 return; 1509 } 1510 if (mStateArray == null) { 1511 mStateArray = new SparseArray<Parcelable>(); 1512 } else { 1513 mStateArray.clear(); 1514 } 1515 f.mInnerView.saveHierarchyState(mStateArray); 1516 if (mStateArray.size() > 0) { 1517 f.mSavedViewState = mStateArray; 1518 mStateArray = null; 1519 } 1520 } 1521 1522 Bundle saveFragmentBasicState(Fragment f) { 1523 Bundle result = null; 1524 1525 if (mStateBundle == null) { 1526 mStateBundle = new Bundle(); 1527 } 1528 f.onSaveInstanceState(mStateBundle); 1529 if (!mStateBundle.isEmpty()) { 1530 result = mStateBundle; 1531 mStateBundle = null; 1532 } 1533 1534 if (f.mView != null) { 1535 saveFragmentViewState(f); 1536 } 1537 if (f.mSavedViewState != null) { 1538 if (result == null) { 1539 result = new Bundle(); 1540 } 1541 result.putSparseParcelableArray( 1542 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1543 } 1544 1545 return result; 1546 } 1547 1548 Parcelable saveAllState() { 1549 // Make sure all pending operations have now been executed to get 1550 // our state update-to-date. 1551 execPendingActions(); 1552 1553 if (HONEYCOMB) { 1554 // As of Honeycomb, we save state after pausing. Prior to that 1555 // it is before pausing. With fragments this is an issue, since 1556 // there are many things you may do after pausing but before 1557 // stopping that change the fragment state. For those older 1558 // devices, we will not at this point say that we have saved 1559 // the state, so we will allow them to continue doing fragment 1560 // transactions. This retains the same semantics as Honeycomb, 1561 // though you do have the risk of losing the very most recent state 1562 // if the process is killed... we'll live with that. 1563 mStateSaved = true; 1564 } 1565 1566 if (mActive == null || mActive.size() <= 0) { 1567 return null; 1568 } 1569 1570 // First collect all active fragments. 1571 int N = mActive.size(); 1572 FragmentState[] active = new FragmentState[N]; 1573 boolean haveFragments = false; 1574 for (int i=0; i<N; i++) { 1575 Fragment f = mActive.get(i); 1576 if (f != null) { 1577 haveFragments = true; 1578 1579 FragmentState fs = new FragmentState(f); 1580 active[i] = fs; 1581 1582 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1583 fs.mSavedFragmentState = saveFragmentBasicState(f); 1584 1585 if (f.mTarget != null) { 1586 if (f.mTarget.mIndex < 0) { 1587 String msg = "Failure saving state: " + f 1588 + " has target not in fragment manager: " + f.mTarget; 1589 Log.e(TAG, msg); 1590 dump(" ", null, new PrintWriter(new LogWriter(TAG)), new String[] { }); 1591 throw new IllegalStateException(msg); 1592 } 1593 if (fs.mSavedFragmentState == null) { 1594 fs.mSavedFragmentState = new Bundle(); 1595 } 1596 putFragment(fs.mSavedFragmentState, 1597 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1598 if (f.mTargetRequestCode != 0) { 1599 fs.mSavedFragmentState.putInt( 1600 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1601 f.mTargetRequestCode); 1602 } 1603 } 1604 1605 } else { 1606 fs.mSavedFragmentState = f.mSavedFragmentState; 1607 } 1608 1609 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1610 + fs.mSavedFragmentState); 1611 } 1612 } 1613 1614 if (!haveFragments) { 1615 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1616 return null; 1617 } 1618 1619 int[] added = null; 1620 BackStackState[] backStack = null; 1621 1622 // Build list of currently added fragments. 1623 if (mAdded != null) { 1624 N = mAdded.size(); 1625 if (N > 0) { 1626 added = new int[N]; 1627 for (int i=0; i<N; i++) { 1628 added[i] = mAdded.get(i).mIndex; 1629 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1630 + ": " + mAdded.get(i)); 1631 } 1632 } 1633 } 1634 1635 // Now save back stack. 1636 if (mBackStack != null) { 1637 N = mBackStack.size(); 1638 if (N > 0) { 1639 backStack = new BackStackState[N]; 1640 for (int i=0; i<N; i++) { 1641 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1642 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1643 + ": " + mBackStack.get(i)); 1644 } 1645 } 1646 } 1647 1648 FragmentManagerState fms = new FragmentManagerState(); 1649 fms.mActive = active; 1650 fms.mAdded = added; 1651 fms.mBackStack = backStack; 1652 return fms; 1653 } 1654 1655 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1656 // If there is no saved state at all, then there can not be 1657 // any nonConfig fragments either, so that is that. 1658 if (state == null) return; 1659 FragmentManagerState fms = (FragmentManagerState)state; 1660 if (fms.mActive == null) return; 1661 1662 // First re-attach any non-config instances we are retaining back 1663 // to their saved state, so we don't try to instantiate them again. 1664 if (nonConfig != null) { 1665 for (int i=0; i<nonConfig.size(); i++) { 1666 Fragment f = nonConfig.get(i); 1667 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1668 FragmentState fs = fms.mActive[f.mIndex]; 1669 fs.mInstance = f; 1670 f.mSavedViewState = null; 1671 f.mBackStackNesting = 0; 1672 f.mInLayout = false; 1673 f.mAdded = false; 1674 f.mTarget = null; 1675 if (fs.mSavedFragmentState != null) { 1676 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1677 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1678 FragmentManagerImpl.VIEW_STATE_TAG); 1679 } 1680 } 1681 } 1682 1683 // Build the full list of active fragments, instantiating them from 1684 // their saved state. 1685 mActive = new ArrayList<Fragment>(fms.mActive.length); 1686 if (mAvailIndices != null) { 1687 mAvailIndices.clear(); 1688 } 1689 for (int i=0; i<fms.mActive.length; i++) { 1690 FragmentState fs = fms.mActive[i]; 1691 if (fs != null) { 1692 Fragment f = fs.instantiate(mActivity); 1693 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1694 mActive.add(f); 1695 // Now that the fragment is instantiated (or came from being 1696 // retained above), clear mInstance in case we end up re-restoring 1697 // from this FragmentState again. 1698 fs.mInstance = null; 1699 } else { 1700 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1701 mActive.add(null); 1702 if (mAvailIndices == null) { 1703 mAvailIndices = new ArrayList<Integer>(); 1704 } 1705 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1706 mAvailIndices.add(i); 1707 } 1708 } 1709 1710 // Update the target of all retained fragments. 1711 if (nonConfig != null) { 1712 for (int i=0; i<nonConfig.size(); i++) { 1713 Fragment f = nonConfig.get(i); 1714 if (f.mTargetIndex >= 0) { 1715 if (f.mTargetIndex < mActive.size()) { 1716 f.mTarget = mActive.get(f.mTargetIndex); 1717 } else { 1718 Log.w(TAG, "Re-attaching retained fragment " + f 1719 + " target no longer exists: " + f.mTargetIndex); 1720 f.mTarget = null; 1721 } 1722 } 1723 } 1724 } 1725 1726 // Build the list of currently added fragments. 1727 if (fms.mAdded != null) { 1728 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1729 for (int i=0; i<fms.mAdded.length; i++) { 1730 Fragment f = mActive.get(fms.mAdded[i]); 1731 if (f == null) { 1732 throw new IllegalStateException( 1733 "No instantiated fragment for index #" + fms.mAdded[i]); 1734 } 1735 f.mAdded = true; 1736 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1737 mAdded.add(f); 1738 } 1739 } else { 1740 mAdded = null; 1741 } 1742 1743 // Build the back stack. 1744 if (fms.mBackStack != null) { 1745 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1746 for (int i=0; i<fms.mBackStack.length; i++) { 1747 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1748 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1749 + " (index " + bse.mIndex + "): " + bse); 1750 mBackStack.add(bse); 1751 if (bse.mIndex >= 0) { 1752 setBackStackIndex(bse.mIndex, bse); 1753 } 1754 } 1755 } else { 1756 mBackStack = null; 1757 } 1758 } 1759 1760 public void attachActivity(FragmentActivity activity) { 1761 if (mActivity != null) throw new IllegalStateException(); 1762 mActivity = activity; 1763 } 1764 1765 public void noteStateNotSaved() { 1766 mStateSaved = false; 1767 } 1768 1769 public void dispatchCreate() { 1770 mStateSaved = false; 1771 moveToState(Fragment.CREATED, false); 1772 } 1773 1774 public void dispatchActivityCreated() { 1775 mStateSaved = false; 1776 moveToState(Fragment.ACTIVITY_CREATED, false); 1777 } 1778 1779 public void dispatchStart() { 1780 mStateSaved = false; 1781 moveToState(Fragment.STARTED, false); 1782 } 1783 1784 public void dispatchResume() { 1785 mStateSaved = false; 1786 moveToState(Fragment.RESUMED, false); 1787 } 1788 1789 public void dispatchPause() { 1790 moveToState(Fragment.STARTED, false); 1791 } 1792 1793 public void dispatchStop() { 1794 // See saveAllState() for the explanation of this. We do this for 1795 // all platform versions, to keep our behavior more consistent between 1796 // them. 1797 mStateSaved = true; 1798 1799 moveToState(Fragment.STOPPED, false); 1800 } 1801 1802 public void dispatchReallyStop() { 1803 moveToState(Fragment.ACTIVITY_CREATED, false); 1804 } 1805 1806 public void dispatchDestroy() { 1807 mDestroyed = true; 1808 execPendingActions(); 1809 moveToState(Fragment.INITIALIZING, false); 1810 mActivity = null; 1811 } 1812 1813 public void dispatchConfigurationChanged(Configuration newConfig) { 1814 if (mActive != null) { 1815 for (int i=0; i<mAdded.size(); i++) { 1816 Fragment f = mAdded.get(i); 1817 if (f != null) { 1818 f.onConfigurationChanged(newConfig); 1819 } 1820 } 1821 } 1822 } 1823 1824 public void dispatchLowMemory() { 1825 if (mActive != null) { 1826 for (int i=0; i<mAdded.size(); i++) { 1827 Fragment f = mAdded.get(i); 1828 if (f != null) { 1829 f.onLowMemory(); 1830 } 1831 } 1832 } 1833 } 1834 1835 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1836 boolean show = false; 1837 ArrayList<Fragment> newMenus = null; 1838 if (mActive != null) { 1839 for (int i=0; i<mAdded.size(); i++) { 1840 Fragment f = mAdded.get(i); 1841 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1842 show = true; 1843 f.onCreateOptionsMenu(menu, inflater); 1844 if (newMenus == null) { 1845 newMenus = new ArrayList<Fragment>(); 1846 } 1847 newMenus.add(f); 1848 } 1849 } 1850 } 1851 1852 if (mCreatedMenus != null) { 1853 for (int i=0; i<mCreatedMenus.size(); i++) { 1854 Fragment f = mCreatedMenus.get(i); 1855 if (newMenus == null || !newMenus.contains(f)) { 1856 f.onDestroyOptionsMenu(); 1857 } 1858 } 1859 } 1860 1861 mCreatedMenus = newMenus; 1862 1863 return show; 1864 } 1865 1866 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1867 boolean show = false; 1868 if (mActive != null) { 1869 for (int i=0; i<mAdded.size(); i++) { 1870 Fragment f = mAdded.get(i); 1871 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1872 show = true; 1873 f.onPrepareOptionsMenu(menu); 1874 } 1875 } 1876 } 1877 return show; 1878 } 1879 1880 public boolean dispatchOptionsItemSelected(MenuItem item) { 1881 if (mActive != null) { 1882 for (int i=0; i<mAdded.size(); i++) { 1883 Fragment f = mAdded.get(i); 1884 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1885 if (f.onOptionsItemSelected(item)) { 1886 return true; 1887 } 1888 } 1889 } 1890 } 1891 return false; 1892 } 1893 1894 public boolean dispatchContextItemSelected(MenuItem item) { 1895 if (mActive != null) { 1896 for (int i=0; i<mAdded.size(); i++) { 1897 Fragment f = mAdded.get(i); 1898 if (f != null && !f.mHidden) { 1899 if (f.onContextItemSelected(item)) { 1900 return true; 1901 } 1902 } 1903 } 1904 } 1905 return false; 1906 } 1907 1908 public void dispatchOptionsMenuClosed(Menu menu) { 1909 if (mActive != null) { 1910 for (int i=0; i<mAdded.size(); i++) { 1911 Fragment f = mAdded.get(i); 1912 if (f != null && !f.mHidden && f.mHasMenu && f.mMenuVisible) { 1913 f.onOptionsMenuClosed(menu); 1914 } 1915 } 1916 } 1917 } 1918 1919 public static int reverseTransit(int transit) { 1920 int rev = 0; 1921 switch (transit) { 1922 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1923 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1924 break; 1925 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1926 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1927 break; 1928 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1929 rev = FragmentTransaction.TRANSIT_FRAGMENT_FADE; 1930 break; 1931 } 1932 return rev; 1933 1934 } 1935 1936 public static final int ANIM_STYLE_OPEN_ENTER = 1; 1937 public static final int ANIM_STYLE_OPEN_EXIT = 2; 1938 public static final int ANIM_STYLE_CLOSE_ENTER = 3; 1939 public static final int ANIM_STYLE_CLOSE_EXIT = 4; 1940 public static final int ANIM_STYLE_FADE_ENTER = 5; 1941 public static final int ANIM_STYLE_FADE_EXIT = 6; 1942 1943 public static int transitToStyleIndex(int transit, boolean enter) { 1944 int animAttr = -1; 1945 switch (transit) { 1946 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1947 animAttr = enter ? ANIM_STYLE_OPEN_ENTER : ANIM_STYLE_OPEN_EXIT; 1948 break; 1949 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1950 animAttr = enter ? ANIM_STYLE_CLOSE_ENTER : ANIM_STYLE_CLOSE_EXIT; 1951 break; 1952 case FragmentTransaction.TRANSIT_FRAGMENT_FADE: 1953 animAttr = enter ? ANIM_STYLE_FADE_ENTER : ANIM_STYLE_FADE_EXIT; 1954 break; 1955 } 1956 return animAttr; 1957 } 1958} 1959