FragmentManager.java revision ab36acb39941ce981dddda9f9cf4d2d23a56fd26
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import android.animation.Animator; 20import android.animation.AnimatorInflater; 21import android.animation.AnimatorListenerAdapter; 22import android.content.res.TypedArray; 23import android.os.Bundle; 24import android.os.Handler; 25import android.os.Parcel; 26import android.os.Parcelable; 27import android.util.Log; 28import android.util.SparseArray; 29import android.view.Menu; 30import android.view.MenuInflater; 31import android.view.MenuItem; 32import android.view.View; 33import android.view.ViewGroup; 34 35import java.io.FileDescriptor; 36import java.io.PrintWriter; 37import java.util.ArrayList; 38 39/** 40 * Interface for interacting with {@link Fragment} objects inside of an 41 * {@link Activity} 42 */ 43public abstract class FragmentManager { 44 /** 45 * Representation of an entry on the fragment back stack, as created 46 * with {@link FragmentTransaction#addToBackStack(String) 47 * FragmentTransaction.addToBackStack()}. Entries can later be 48 * retrieved with {@link FragmentManager#getBackStackEntry(int) 49 * FragmentManager.getBackStackEntry()}. 50 * 51 * <p>Note that you should never hold on to a BackStackEntry object; 52 * the identifier as returned by {@link #getId} is the only thing that 53 * will be persisted across activity instances. 54 */ 55 public interface BackStackEntry { 56 /** 57 * Return the unique identifier for the entry. This is the only 58 * representation of the entry that will persist across activity 59 * instances. 60 */ 61 public int getId(); 62 63 /** 64 * Return the full bread crumb title for the entry, or null if it 65 * does not have one. 66 */ 67 public CharSequence getBreadCrumbTitle(); 68 69 /** 70 * Return the short bread crumb title for the entry, or null if it 71 * does not have one. 72 */ 73 public CharSequence getBreadCrumbShortTitle(); 74 } 75 76 /** 77 * Interface to watch for changes to the back stack. 78 */ 79 public interface OnBackStackChangedListener { 80 /** 81 * Called whenever the contents of the back stack change. 82 */ 83 public void onBackStackChanged(); 84 } 85 86 /** 87 * Start a series of edit operations on the Fragments associated with 88 * this FragmentManager. 89 * 90 * <p>Note: A fragment transaction can only be created/committed prior 91 * to an activity saving its state. If you try to commit a transaction 92 * after {@link Activity#onSaveInstanceState Activity.onSaveInstanceState()} 93 * (and prior to a following {@link Activity#onStart Activity.onStart} 94 * or {@link Activity#onResume Activity.onResume()}, you will get an error. 95 * This is because the framework takes care of saving your current fragments 96 * in the state, and if changes are made after the state is saved then they 97 * will be lost.</p> 98 */ 99 public abstract FragmentTransaction openTransaction(); 100 101 /** 102 * Finds a fragment that was identified by the given id either when inflated 103 * from XML or as the container ID when added in a transaction. This first 104 * searches through fragments that are currently added to the manager's 105 * activity; if no such fragment is found, then all fragments currently 106 * on the back stack associated with this ID are searched. 107 * @return The fragment if found or null otherwise. 108 */ 109 public abstract Fragment findFragmentById(int id); 110 111 /** 112 * Finds a fragment that was identified by the given tag either when inflated 113 * from XML or as supplied when added in a transaction. This first 114 * searches through fragments that are currently added to the manager's 115 * activity; if no such fragment is found, then all fragments currently 116 * on the back stack are searched. 117 * @return The fragment if found or null otherwise. 118 */ 119 public abstract Fragment findFragmentByTag(String tag); 120 121 /** 122 * Flag for {@link #popBackStack(String, int)} 123 * and {@link #popBackStack(int, int)}: If set, and the name or ID of 124 * a back stack entry has been supplied, then all matching entries will 125 * be consumed until one that doesn't match is found or the bottom of 126 * the stack is reached. Otherwise, all entries up to but not including that entry 127 * will be removed. 128 */ 129 public static final int POP_BACK_STACK_INCLUSIVE = 1<<0; 130 131 /** 132 * Pop the top state off the back stack. Returns true if there was one 133 * to pop, else false. 134 */ 135 public abstract boolean popBackStack(); 136 137 /** 138 * Pop the last fragment transition from the manager's fragment 139 * back stack. If there is nothing to pop, false is returned. 140 * @param name If non-null, this is the name of a previous back state 141 * to look for; if found, all states up to that state will be popped. The 142 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 143 * the named state itself is popped. If null, only the top state is popped. 144 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 145 */ 146 public abstract boolean popBackStack(String name, int flags); 147 148 /** 149 * Pop all back stack states up to the one with the given identifier. 150 * @param id Identifier of the stated to be popped. If no identifier exists, 151 * false is returned. 152 * The identifier is the number returned by 153 * {@link FragmentTransaction#commit() FragmentTransaction.commit()}. The 154 * {@link #POP_BACK_STACK_INCLUSIVE} flag can be used to control whether 155 * the named state itself is popped. 156 * @param flags Either 0 or {@link #POP_BACK_STACK_INCLUSIVE}. 157 */ 158 public abstract boolean popBackStack(int id, int flags); 159 160 /** 161 * Return the number of entries currently in the back stack. 162 */ 163 public abstract int countBackStackEntries(); 164 165 /** 166 * Return the BackStackEntry at index <var>index</var> in the back stack; 167 * entries start index 0 being the bottom of the stack. 168 */ 169 public abstract BackStackEntry getBackStackEntry(int index); 170 171 /** 172 * Add a new listener for changes to the fragment back stack. 173 */ 174 public abstract void addOnBackStackChangedListener(OnBackStackChangedListener listener); 175 176 /** 177 * Remove a listener that was previously added with 178 * {@link #addOnBackStackChangedListener(OnBackStackChangedListener)}. 179 */ 180 public abstract void removeOnBackStackChangedListener(OnBackStackChangedListener listener); 181 182 /** 183 * Put a reference to a fragment in a Bundle. This Bundle can be 184 * persisted as saved state, and when later restoring 185 * {@link #getFragment(Bundle, String)} will return the current 186 * instance of the same fragment. 187 * 188 * @param bundle The bundle in which to put the fragment reference. 189 * @param key The name of the entry in the bundle. 190 * @param fragment The Fragment whose reference is to be stored. 191 */ 192 public abstract void putFragment(Bundle bundle, String key, Fragment fragment); 193 194 /** 195 * Retrieve the current Fragment instance for a reference previously 196 * placed with {@link #putFragment(Bundle, String, Fragment)}. 197 * 198 * @param bundle The bundle from which to retrieve the fragment reference. 199 * @param key The name of the entry in the bundle. 200 * @return Returns the current Fragment instance that is associated with 201 * the given reference. 202 */ 203 public abstract Fragment getFragment(Bundle bundle, String key); 204 205 /** 206 * Print the FragmentManager's state into the given stream. 207 * 208 * @param prefix Text to print at the front of each line. 209 * @param fd The raw file descriptor that the dump is being sent to. 210 * @param writer A PrintWriter to which the dump is to be set. 211 * @param args additional arguments to the dump request. 212 */ 213 public abstract void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args); 214} 215 216final class FragmentManagerState implements Parcelable { 217 FragmentState[] mActive; 218 int[] mAdded; 219 BackStackState[] mBackStack; 220 221 public FragmentManagerState() { 222 } 223 224 public FragmentManagerState(Parcel in) { 225 mActive = in.createTypedArray(FragmentState.CREATOR); 226 mAdded = in.createIntArray(); 227 mBackStack = in.createTypedArray(BackStackState.CREATOR); 228 } 229 230 public int describeContents() { 231 return 0; 232 } 233 234 public void writeToParcel(Parcel dest, int flags) { 235 dest.writeTypedArray(mActive, flags); 236 dest.writeIntArray(mAdded); 237 dest.writeTypedArray(mBackStack, flags); 238 } 239 240 public static final Parcelable.Creator<FragmentManagerState> CREATOR 241 = new Parcelable.Creator<FragmentManagerState>() { 242 public FragmentManagerState createFromParcel(Parcel in) { 243 return new FragmentManagerState(in); 244 } 245 246 public FragmentManagerState[] newArray(int size) { 247 return new FragmentManagerState[size]; 248 } 249 }; 250} 251 252/** 253 * Container for fragments associated with an activity. 254 */ 255final class FragmentManagerImpl extends FragmentManager { 256 static final boolean DEBUG = true; 257 static final String TAG = "FragmentManager"; 258 259 static final String TARGET_REQUEST_CODE_STATE_TAG = "android:target_req_state"; 260 static final String TARGET_STATE_TAG = "android:target_state"; 261 static final String VIEW_STATE_TAG = "android:view_state"; 262 263 ArrayList<Runnable> mPendingActions; 264 Runnable[] mTmpActions; 265 boolean mExecutingActions; 266 267 ArrayList<Fragment> mActive; 268 ArrayList<Fragment> mAdded; 269 ArrayList<Integer> mAvailIndices; 270 ArrayList<BackStackRecord> mBackStack; 271 ArrayList<Fragment> mCreatedMenus; 272 273 // Must be accessed while locked. 274 ArrayList<BackStackRecord> mBackStackIndices; 275 ArrayList<Integer> mAvailBackStackIndices; 276 277 ArrayList<OnBackStackChangedListener> mBackStackChangeListeners; 278 279 int mCurState = Fragment.INITIALIZING; 280 Activity mActivity; 281 282 boolean mNeedMenuInvalidate; 283 boolean mStateSaved; 284 String mNoTransactionsBecause; 285 286 // Temporary vars for state save and restore. 287 Bundle mStateBundle = null; 288 SparseArray<Parcelable> mStateArray = null; 289 290 Runnable mExecCommit = new Runnable() { 291 @Override 292 public void run() { 293 execPendingActions(); 294 } 295 }; 296 297 @Override 298 public FragmentTransaction openTransaction() { 299 return new BackStackRecord(this); 300 } 301 302 @Override 303 public boolean popBackStack() { 304 return popBackStackState(mActivity.mHandler, null, -1, 0); 305 } 306 307 @Override 308 public boolean popBackStack(String name, int flags) { 309 return popBackStackState(mActivity.mHandler, name, -1, flags); 310 } 311 312 @Override 313 public boolean popBackStack(int id, int flags) { 314 if (id < 0) { 315 throw new IllegalArgumentException("Bad id: " + id); 316 } 317 return popBackStackState(mActivity.mHandler, null, id, flags); 318 } 319 320 @Override 321 public int countBackStackEntries() { 322 return mBackStack != null ? mBackStack.size() : 0; 323 } 324 325 @Override 326 public BackStackEntry getBackStackEntry(int index) { 327 return mBackStack.get(index); 328 } 329 330 @Override 331 public void addOnBackStackChangedListener(OnBackStackChangedListener listener) { 332 if (mBackStackChangeListeners == null) { 333 mBackStackChangeListeners = new ArrayList<OnBackStackChangedListener>(); 334 } 335 mBackStackChangeListeners.add(listener); 336 } 337 338 @Override 339 public void removeOnBackStackChangedListener(OnBackStackChangedListener listener) { 340 if (mBackStackChangeListeners != null) { 341 mBackStackChangeListeners.remove(listener); 342 } 343 } 344 345 @Override 346 public void putFragment(Bundle bundle, String key, Fragment fragment) { 347 if (fragment.mIndex < 0) { 348 throw new IllegalStateException("Fragment " + fragment 349 + " is not currently in the FragmentManager"); 350 } 351 bundle.putInt(key, fragment.mIndex); 352 } 353 354 @Override 355 public Fragment getFragment(Bundle bundle, String key) { 356 int index = bundle.getInt(key, -1); 357 if (index == -1) { 358 return null; 359 } 360 if (index >= mActive.size()) { 361 throw new IllegalStateException("Fragement no longer exists for key " 362 + key + ": index " + index); 363 } 364 Fragment f = mActive.get(index); 365 if (f == null) { 366 throw new IllegalStateException("Fragement no longer exists for key " 367 + key + ": index " + index); 368 } 369 return f; 370 } 371 372 @Override 373 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 374 if (mActive == null || mActive.size() <= 0) { 375 return; 376 } 377 378 writer.print(prefix); writer.println("Active Fragments:"); 379 380 String innerPrefix = prefix + " "; 381 382 int N = mActive.size(); 383 for (int i=0; i<N; i++) { 384 Fragment f = mActive.get(i); 385 if (f != null) { 386 writer.print(prefix); writer.print(" #"); writer.print(i); 387 writer.print(": "); writer.println(f.toString()); 388 f.dump(innerPrefix, fd, writer, args); 389 } 390 } 391 392 if (mAdded != null) { 393 N = mAdded.size(); 394 if (N > 0) { 395 writer.print(prefix); writer.println("Added Fragments:"); 396 for (int i=0; i<N; i++) { 397 Fragment f = mAdded.get(i); 398 writer.print(prefix); writer.print(" #"); writer.print(i); 399 writer.print(": "); writer.println(f.toString()); 400 } 401 } 402 } 403 404 if (mBackStack != null) { 405 N = mBackStack.size(); 406 if (N > 0) { 407 writer.print(prefix); writer.println("Back Stack:"); 408 for (int i=0; i<N; i++) { 409 BackStackRecord bs = mBackStack.get(i); 410 writer.print(prefix); writer.print(" #"); writer.print(i); 411 writer.print(": "); writer.println(bs.toString()); 412 } 413 } 414 } 415 } 416 417 Animator loadAnimator(Fragment fragment, int transit, boolean enter, 418 int transitionStyle) { 419 Animator animObj = fragment.onCreateAnimator(transit, enter, 420 fragment.mNextAnim); 421 if (animObj != null) { 422 return animObj; 423 } 424 425 if (fragment.mNextAnim != 0) { 426 Animator anim = AnimatorInflater.loadAnimator(mActivity, fragment.mNextAnim); 427 if (anim != null) { 428 return anim; 429 } 430 } 431 432 if (transit == 0) { 433 return null; 434 } 435 436 int styleIndex = transitToStyleIndex(transit, enter); 437 if (styleIndex < 0) { 438 return null; 439 } 440 441 if (transitionStyle == 0 && mActivity.getWindow() != null) { 442 transitionStyle = mActivity.getWindow().getAttributes().windowAnimations; 443 } 444 if (transitionStyle == 0) { 445 return null; 446 } 447 448 TypedArray attrs = mActivity.obtainStyledAttributes(transitionStyle, 449 com.android.internal.R.styleable.FragmentAnimation); 450 int anim = attrs.getResourceId(styleIndex, 0); 451 attrs.recycle(); 452 453 if (anim == 0) { 454 return null; 455 } 456 457 return AnimatorInflater.loadAnimator(mActivity, anim); 458 } 459 460 void moveToState(Fragment f, int newState, int transit, int transitionStyle) { 461 // Fragments that are not currently added will sit in the onCreate() state. 462 if (!f.mAdded && newState > Fragment.CREATED) { 463 newState = Fragment.CREATED; 464 } 465 466 if (f.mState < newState) { 467 switch (f.mState) { 468 case Fragment.INITIALIZING: 469 if (DEBUG) Log.v(TAG, "moveto CREATED: " + f); 470 if (f.mSavedFragmentState != null) { 471 f.mSavedViewState = f.mSavedFragmentState.getSparseParcelableArray( 472 FragmentManagerImpl.VIEW_STATE_TAG); 473 f.mTarget = getFragment(f.mSavedFragmentState, 474 FragmentManagerImpl.TARGET_STATE_TAG); 475 if (f.mTarget != null) { 476 f.mTargetRequestCode = f.mSavedFragmentState.getInt( 477 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 0); 478 } 479 } 480 f.mActivity = mActivity; 481 f.mCalled = false; 482 f.onAttach(mActivity); 483 if (!f.mCalled) { 484 throw new SuperNotCalledException("Fragment " + f 485 + " did not call through to super.onAttach()"); 486 } 487 mActivity.onAttachFragment(f); 488 489 if (!f.mRetaining) { 490 f.mCalled = false; 491 f.onCreate(f.mSavedFragmentState); 492 if (!f.mCalled) { 493 throw new SuperNotCalledException("Fragment " + f 494 + " did not call through to super.onCreate()"); 495 } 496 } 497 f.mRetaining = false; 498 if (f.mFromLayout) { 499 // For fragments that are part of the content view 500 // layout, we need to instantiate the view immediately 501 // and the inflater will take care of adding it. 502 f.mView = f.onCreateView(mActivity.getLayoutInflater(), 503 null, f.mSavedFragmentState); 504 if (f.mView != null) { 505 f.mView.setSaveFromParentEnabled(false); 506 f.restoreViewState(); 507 if (f.mHidden) f.mView.setVisibility(View.GONE); 508 } 509 } 510 case Fragment.CREATED: 511 if (newState > Fragment.CREATED) { 512 if (DEBUG) Log.v(TAG, "moveto CONTENT: " + f); 513 if (!f.mFromLayout) { 514 ViewGroup container = null; 515 if (f.mContainerId != 0) { 516 container = (ViewGroup)mActivity.findViewById(f.mContainerId); 517 if (container == null) { 518 throw new IllegalArgumentException("No view found for id 0x" 519 + Integer.toHexString(f.mContainerId) 520 + " for fragment " + f); 521 } 522 } 523 f.mContainer = container; 524 f.mView = f.onCreateView(mActivity.getLayoutInflater(), 525 container, f.mSavedFragmentState); 526 if (f.mView != null) { 527 f.mView.setSaveFromParentEnabled(false); 528 if (container != null) { 529 Animator anim = loadAnimator(f, transit, true, 530 transitionStyle); 531 if (anim != null) { 532 anim.setTarget(f.mView); 533 anim.start(); 534 } 535 container.addView(f.mView); 536 f.restoreViewState(); 537 } 538 if (f.mHidden) f.mView.setVisibility(View.GONE); 539 } 540 } 541 542 f.mCalled = false; 543 f.onActivityCreated(f.mSavedFragmentState); 544 if (!f.mCalled) { 545 throw new SuperNotCalledException("Fragment " + f 546 + " did not call through to super.onReady()"); 547 } 548 f.mSavedFragmentState = null; 549 } 550 case Fragment.ACTIVITY_CREATED: 551 if (newState > Fragment.ACTIVITY_CREATED) { 552 if (DEBUG) Log.v(TAG, "moveto STARTED: " + f); 553 f.mCalled = false; 554 f.onStart(); 555 if (!f.mCalled) { 556 throw new SuperNotCalledException("Fragment " + f 557 + " did not call through to super.onStart()"); 558 } 559 } 560 case Fragment.STARTED: 561 if (newState > Fragment.STARTED) { 562 if (DEBUG) Log.v(TAG, "moveto RESUMED: " + f); 563 f.mCalled = false; 564 f.mResumed = true; 565 f.onResume(); 566 if (!f.mCalled) { 567 throw new SuperNotCalledException("Fragment " + f 568 + " did not call through to super.onResume()"); 569 } 570 } 571 } 572 } else if (f.mState > newState) { 573 switch (f.mState) { 574 case Fragment.RESUMED: 575 if (newState < Fragment.RESUMED) { 576 if (DEBUG) Log.v(TAG, "movefrom RESUMED: " + f); 577 f.mCalled = false; 578 f.onPause(); 579 if (!f.mCalled) { 580 throw new SuperNotCalledException("Fragment " + f 581 + " did not call through to super.onPause()"); 582 } 583 f.mResumed = false; 584 } 585 case Fragment.STARTED: 586 if (newState < Fragment.STARTED) { 587 if (DEBUG) Log.v(TAG, "movefrom STARTED: " + f); 588 f.mCalled = false; 589 f.performStop(); 590 if (!f.mCalled) { 591 throw new SuperNotCalledException("Fragment " + f 592 + " did not call through to super.onStop()"); 593 } 594 } 595 case Fragment.ACTIVITY_CREATED: 596 if (newState < Fragment.ACTIVITY_CREATED) { 597 if (DEBUG) Log.v(TAG, "movefrom CONTENT: " + f); 598 if (f.mView != null) { 599 // Need to save the current view state if not 600 // done already. 601 if (!mActivity.isFinishing() && f.mSavedViewState == null) { 602 saveFragmentViewState(f); 603 } 604 } 605 f.mCalled = false; 606 f.onDestroyView(); 607 if (!f.mCalled) { 608 throw new SuperNotCalledException("Fragment " + f 609 + " did not call through to super.onDestroyedView()"); 610 } 611 if (f.mView != null && f.mContainer != null) { 612 Animator anim = null; 613 if (mCurState > Fragment.INITIALIZING) { 614 anim = loadAnimator(f, transit, false, 615 transitionStyle); 616 } 617 if (anim != null) { 618 final ViewGroup container = f.mContainer; 619 final View view = f.mView; 620 container.startViewTransition(view); 621 anim.addListener(new AnimatorListenerAdapter() { 622 @Override 623 public void onAnimationEnd(Animator anim) { 624 container.endViewTransition(view); 625 } 626 }); 627 anim.setTarget(f.mView); 628 anim.start(); 629 630 } 631 f.mContainer.removeView(f.mView); 632 } 633 f.mContainer = null; 634 f.mView = null; 635 } 636 case Fragment.CREATED: 637 if (newState < Fragment.CREATED) { 638 if (DEBUG) Log.v(TAG, "movefrom CREATED: " + f); 639 if (!f.mRetaining) { 640 f.mCalled = false; 641 f.onDestroy(); 642 if (!f.mCalled) { 643 throw new SuperNotCalledException("Fragment " + f 644 + " did not call through to super.onDestroy()"); 645 } 646 } 647 648 f.mCalled = false; 649 f.onDetach(); 650 if (!f.mCalled) { 651 throw new SuperNotCalledException("Fragment " + f 652 + " did not call through to super.onDetach()"); 653 } 654 f.mImmediateActivity = null; 655 f.mActivity = null; 656 } 657 } 658 } 659 660 f.mState = newState; 661 } 662 663 void moveToState(Fragment f) { 664 moveToState(f, mCurState, 0, 0); 665 } 666 667 void moveToState(int newState, boolean always) { 668 moveToState(newState, 0, 0, always); 669 } 670 671 void moveToState(int newState, int transit, int transitStyle, boolean always) { 672 if (mActivity == null && newState != Fragment.INITIALIZING) { 673 throw new IllegalStateException("No activity"); 674 } 675 676 if (!always && mCurState == newState) { 677 return; 678 } 679 680 mCurState = newState; 681 if (mActive != null) { 682 for (int i=0; i<mActive.size(); i++) { 683 Fragment f = mActive.get(i); 684 if (f != null) { 685 moveToState(f, newState, transit, transitStyle); 686 } 687 } 688 689 if (mNeedMenuInvalidate && mActivity != null) { 690 mActivity.invalidateOptionsMenu(); 691 mNeedMenuInvalidate = false; 692 } 693 } 694 } 695 696 void makeActive(Fragment f) { 697 if (f.mIndex >= 0) { 698 return; 699 } 700 701 if (mAvailIndices == null || mAvailIndices.size() <= 0) { 702 if (mActive == null) { 703 mActive = new ArrayList<Fragment>(); 704 } 705 f.setIndex(mActive.size()); 706 mActive.add(f); 707 708 } else { 709 f.setIndex(mAvailIndices.remove(mAvailIndices.size()-1)); 710 mActive.set(f.mIndex, f); 711 } 712 } 713 714 void makeInactive(Fragment f) { 715 if (f.mIndex < 0) { 716 return; 717 } 718 719 if (DEBUG) Log.v(TAG, "Freeing fragment index " + f.mIndex); 720 mActive.set(f.mIndex, null); 721 if (mAvailIndices == null) { 722 mAvailIndices = new ArrayList<Integer>(); 723 } 724 mAvailIndices.add(f.mIndex); 725 mActivity.invalidateFragmentIndex(f.mIndex); 726 f.clearIndex(); 727 } 728 729 public void addFragment(Fragment fragment, boolean moveToStateNow) { 730 if (mAdded == null) { 731 mAdded = new ArrayList<Fragment>(); 732 } 733 mAdded.add(fragment); 734 makeActive(fragment); 735 if (DEBUG) Log.v(TAG, "add: " + fragment); 736 fragment.mAdded = true; 737 if (fragment.mHasMenu) { 738 mNeedMenuInvalidate = true; 739 } 740 if (moveToStateNow) { 741 moveToState(fragment); 742 } 743 } 744 745 public void removeFragment(Fragment fragment, int transition, int transitionStyle) { 746 if (DEBUG) Log.v(TAG, "remove: " + fragment + " nesting=" + fragment.mBackStackNesting); 747 mAdded.remove(fragment); 748 final boolean inactive = fragment.mBackStackNesting <= 0; 749 if (fragment.mHasMenu) { 750 mNeedMenuInvalidate = true; 751 } 752 fragment.mAdded = false; 753 moveToState(fragment, inactive ? Fragment.INITIALIZING : Fragment.CREATED, 754 transition, transitionStyle); 755 if (inactive) { 756 makeInactive(fragment); 757 } 758 } 759 760 public void hideFragment(Fragment fragment, int transition, int transitionStyle) { 761 if (DEBUG) Log.v(TAG, "hide: " + fragment); 762 if (!fragment.mHidden) { 763 fragment.mHidden = true; 764 if (fragment.mView != null) { 765 Animator anim = loadAnimator(fragment, transition, true, 766 transitionStyle); 767 if (anim != null) { 768 anim.setTarget(fragment.mView); 769 anim.start(); 770 } 771 fragment.mView.setVisibility(View.GONE); 772 } 773 if (fragment.mAdded && fragment.mHasMenu) { 774 mNeedMenuInvalidate = true; 775 } 776 fragment.onHiddenChanged(true); 777 } 778 } 779 780 public void showFragment(Fragment fragment, int transition, int transitionStyle) { 781 if (DEBUG) Log.v(TAG, "show: " + fragment); 782 if (fragment.mHidden) { 783 fragment.mHidden = false; 784 if (fragment.mView != null) { 785 Animator anim = loadAnimator(fragment, transition, true, 786 transitionStyle); 787 if (anim != null) { 788 anim.setTarget(fragment.mView); 789 anim.start(); 790 } 791 fragment.mView.setVisibility(View.VISIBLE); 792 } 793 if (fragment.mAdded && fragment.mHasMenu) { 794 mNeedMenuInvalidate = true; 795 } 796 fragment.onHiddenChanged(false); 797 } 798 } 799 800 public Fragment findFragmentById(int id) { 801 if (mActive != null) { 802 // First look through added fragments. 803 for (int i=mAdded.size()-1; i>=0; i--) { 804 Fragment f = mAdded.get(i); 805 if (f != null && f.mFragmentId == id) { 806 return f; 807 } 808 } 809 // Now for any known fragment. 810 for (int i=mActive.size()-1; i>=0; i--) { 811 Fragment f = mActive.get(i); 812 if (f != null && f.mFragmentId == id) { 813 return f; 814 } 815 } 816 } 817 return null; 818 } 819 820 public Fragment findFragmentByTag(String tag) { 821 if (mActive != null && tag != null) { 822 // First look through added fragments. 823 for (int i=mAdded.size()-1; i>=0; i--) { 824 Fragment f = mAdded.get(i); 825 if (f != null && tag.equals(f.mTag)) { 826 return f; 827 } 828 } 829 // Now for any known fragment. 830 for (int i=mActive.size()-1; i>=0; i--) { 831 Fragment f = mActive.get(i); 832 if (f != null && tag.equals(f.mTag)) { 833 return f; 834 } 835 } 836 } 837 return null; 838 } 839 840 public Fragment findFragmentByWho(String who) { 841 if (mActive != null && who != null) { 842 for (int i=mActive.size()-1; i>=0; i--) { 843 Fragment f = mActive.get(i); 844 if (f != null && who.equals(f.mWho)) { 845 return f; 846 } 847 } 848 } 849 return null; 850 } 851 852 public void enqueueAction(Runnable action, boolean allowStateLoss) { 853 if (!allowStateLoss && mStateSaved) { 854 throw new IllegalStateException( 855 "Can not perform this action after onSaveInstanceState"); 856 } 857 if (mNoTransactionsBecause != null) { 858 throw new IllegalStateException( 859 "Can not perform this action inside of " + mNoTransactionsBecause); 860 } 861 synchronized (this) { 862 if (mPendingActions == null) { 863 mPendingActions = new ArrayList<Runnable>(); 864 } 865 mPendingActions.add(action); 866 if (mPendingActions.size() == 1) { 867 mActivity.mHandler.removeCallbacks(mExecCommit); 868 mActivity.mHandler.post(mExecCommit); 869 } 870 } 871 } 872 873 public int allocBackStackIndex(BackStackRecord bse) { 874 synchronized (this) { 875 if (mAvailBackStackIndices == null || mAvailBackStackIndices.size() <= 0) { 876 if (mBackStackIndices == null) { 877 mBackStackIndices = new ArrayList<BackStackRecord>(); 878 } 879 int index = mBackStackIndices.size(); 880 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 881 mBackStackIndices.add(bse); 882 return index; 883 884 } else { 885 int index = mAvailBackStackIndices.remove(mAvailBackStackIndices.size()-1); 886 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 887 mBackStackIndices.set(index, bse); 888 return index; 889 } 890 } 891 } 892 893 public void setBackStackIndex(int index, BackStackRecord bse) { 894 synchronized (this) { 895 if (mBackStackIndices == null) { 896 mBackStackIndices = new ArrayList<BackStackRecord>(); 897 } 898 int N = mBackStackIndices.size(); 899 if (index < N) { 900 if (DEBUG) Log.v(TAG, "Setting back stack index " + index + " to " + bse); 901 mBackStackIndices.set(index, bse); 902 } else { 903 while (N < index) { 904 mBackStackIndices.add(null); 905 if (mAvailBackStackIndices == null) { 906 mAvailBackStackIndices = new ArrayList<Integer>(); 907 } 908 if (DEBUG) Log.v(TAG, "Adding available back stack index " + N); 909 mAvailBackStackIndices.add(N); 910 N++; 911 } 912 if (DEBUG) Log.v(TAG, "Adding back stack index " + index + " with " + bse); 913 mBackStackIndices.add(bse); 914 } 915 } 916 } 917 918 public void freeBackStackIndex(int index) { 919 synchronized (this) { 920 mBackStackIndices.set(index, null); 921 if (mAvailBackStackIndices == null) { 922 mAvailBackStackIndices = new ArrayList<Integer>(); 923 } 924 if (DEBUG) Log.v(TAG, "Freeing back stack index " + index); 925 mAvailBackStackIndices.add(index); 926 } 927 } 928 929 /** 930 * Only call from main thread! 931 */ 932 public void execPendingActions() { 933 if (mExecutingActions) { 934 throw new IllegalStateException("Recursive entry to execPendingActions"); 935 } 936 937 while (true) { 938 int numActions; 939 940 synchronized (this) { 941 if (mPendingActions == null || mPendingActions.size() == 0) { 942 return; 943 } 944 945 numActions = mPendingActions.size(); 946 if (mTmpActions == null || mTmpActions.length < numActions) { 947 mTmpActions = new Runnable[numActions]; 948 } 949 mPendingActions.toArray(mTmpActions); 950 mPendingActions.clear(); 951 mActivity.mHandler.removeCallbacks(mExecCommit); 952 } 953 954 mExecutingActions = true; 955 for (int i=0; i<numActions; i++) { 956 mTmpActions[i].run(); 957 } 958 mExecutingActions = false; 959 } 960 } 961 962 void reportBackStackChanged() { 963 if (mBackStackChangeListeners != null) { 964 for (int i=0; i<mBackStackChangeListeners.size(); i++) { 965 mBackStackChangeListeners.get(i).onBackStackChanged(); 966 } 967 } 968 } 969 970 void addBackStackState(BackStackRecord state) { 971 if (mBackStack == null) { 972 mBackStack = new ArrayList<BackStackRecord>(); 973 } 974 mBackStack.add(state); 975 reportBackStackChanged(); 976 } 977 978 boolean popBackStackState(Handler handler, String name, int id, int flags) { 979 if (mBackStack == null) { 980 return false; 981 } 982 if (name == null && id < 0 && (flags&Activity.POP_BACK_STACK_INCLUSIVE) == 0) { 983 int last = mBackStack.size()-1; 984 if (last < 0) { 985 return false; 986 } 987 final BackStackRecord bss = mBackStack.remove(last); 988 enqueueAction(new Runnable() { 989 public void run() { 990 if (DEBUG) Log.v(TAG, "Popping back stack state: " + bss); 991 bss.popFromBackStack(true); 992 reportBackStackChanged(); 993 } 994 }, false); 995 } else { 996 int index = -1; 997 if (name != null || id >= 0) { 998 // If a name or ID is specified, look for that place in 999 // the stack. 1000 index = mBackStack.size()-1; 1001 while (index >= 0) { 1002 BackStackRecord bss = mBackStack.get(index); 1003 if (name != null && name.equals(bss.getName())) { 1004 break; 1005 } 1006 if (id >= 0 && id == bss.mIndex) { 1007 break; 1008 } 1009 index--; 1010 } 1011 if (index < 0) { 1012 return false; 1013 } 1014 if ((flags&Activity.POP_BACK_STACK_INCLUSIVE) != 0) { 1015 index--; 1016 // Consume all following entries that match. 1017 while (index >= 0) { 1018 BackStackRecord bss = mBackStack.get(index); 1019 if ((name != null && name.equals(bss.getName())) 1020 || (id >= 0 && id == bss.mIndex)) { 1021 index--; 1022 continue; 1023 } 1024 break; 1025 } 1026 } 1027 } 1028 if (index == mBackStack.size()-1) { 1029 return false; 1030 } 1031 final ArrayList<BackStackRecord> states 1032 = new ArrayList<BackStackRecord>(); 1033 for (int i=mBackStack.size()-1; i>index; i--) { 1034 states.add(mBackStack.remove(i)); 1035 } 1036 enqueueAction(new Runnable() { 1037 public void run() { 1038 final int LAST = states.size()-1; 1039 for (int i=0; i<=LAST; i++) { 1040 if (DEBUG) Log.v(TAG, "Popping back stack state: " + states.get(i)); 1041 states.get(i).popFromBackStack(i == LAST); 1042 } 1043 reportBackStackChanged(); 1044 } 1045 }, false); 1046 } 1047 return true; 1048 } 1049 1050 ArrayList<Fragment> retainNonConfig() { 1051 ArrayList<Fragment> fragments = null; 1052 if (mActive != null) { 1053 for (int i=0; i<mActive.size(); i++) { 1054 Fragment f = mActive.get(i); 1055 if (f != null && f.mRetainInstance) { 1056 if (fragments == null) { 1057 fragments = new ArrayList<Fragment>(); 1058 } 1059 fragments.add(f); 1060 f.mRetaining = true; 1061 } 1062 } 1063 } 1064 return fragments; 1065 } 1066 1067 void saveFragmentViewState(Fragment f) { 1068 if (f.mView == null) { 1069 return; 1070 } 1071 if (mStateArray == null) { 1072 mStateArray = new SparseArray<Parcelable>(); 1073 } 1074 f.mView.saveHierarchyState(mStateArray); 1075 if (mStateArray.size() > 0) { 1076 f.mSavedViewState = mStateArray; 1077 mStateArray = null; 1078 } 1079 } 1080 1081 Parcelable saveAllState() { 1082 mStateSaved = true; 1083 1084 if (mActive == null || mActive.size() <= 0) { 1085 return null; 1086 } 1087 1088 // First collect all active fragments. 1089 int N = mActive.size(); 1090 FragmentState[] active = new FragmentState[N]; 1091 boolean haveFragments = false; 1092 for (int i=0; i<N; i++) { 1093 Fragment f = mActive.get(i); 1094 if (f != null) { 1095 haveFragments = true; 1096 1097 FragmentState fs = new FragmentState(f); 1098 active[i] = fs; 1099 1100 if (f.mState > Fragment.INITIALIZING && fs.mSavedFragmentState == null) { 1101 if (mStateBundle == null) { 1102 mStateBundle = new Bundle(); 1103 } 1104 f.onSaveInstanceState(mStateBundle); 1105 if (!mStateBundle.isEmpty()) { 1106 fs.mSavedFragmentState = mStateBundle; 1107 mStateBundle = null; 1108 } 1109 1110 if (f.mView != null) { 1111 saveFragmentViewState(f); 1112 if (f.mSavedViewState != null) { 1113 if (fs.mSavedFragmentState == null) { 1114 fs.mSavedFragmentState = new Bundle(); 1115 } 1116 fs.mSavedFragmentState.putSparseParcelableArray( 1117 FragmentManagerImpl.VIEW_STATE_TAG, f.mSavedViewState); 1118 } 1119 } 1120 1121 if (f.mTarget != null) { 1122 if (fs.mSavedFragmentState == null) { 1123 fs.mSavedFragmentState = new Bundle(); 1124 } 1125 putFragment(fs.mSavedFragmentState, 1126 FragmentManagerImpl.TARGET_STATE_TAG, f.mTarget); 1127 if (f.mTargetRequestCode != 0) { 1128 fs.mSavedFragmentState.putInt( 1129 FragmentManagerImpl.TARGET_REQUEST_CODE_STATE_TAG, 1130 f.mTargetRequestCode); 1131 } 1132 } 1133 1134 } else { 1135 fs.mSavedFragmentState = f.mSavedFragmentState; 1136 } 1137 1138 if (DEBUG) Log.v(TAG, "Saved state of " + f + ": " 1139 + fs.mSavedFragmentState); 1140 } 1141 } 1142 1143 if (!haveFragments) { 1144 if (DEBUG) Log.v(TAG, "saveAllState: no fragments!"); 1145 return null; 1146 } 1147 1148 int[] added = null; 1149 BackStackState[] backStack = null; 1150 1151 // Build list of currently added fragments. 1152 if (mAdded != null) { 1153 N = mAdded.size(); 1154 if (N > 0) { 1155 added = new int[N]; 1156 for (int i=0; i<N; i++) { 1157 added[i] = mAdded.get(i).mIndex; 1158 if (DEBUG) Log.v(TAG, "saveAllState: adding fragment #" + i 1159 + ": " + mAdded.get(i)); 1160 } 1161 } 1162 } 1163 1164 // Now save back stack. 1165 if (mBackStack != null) { 1166 N = mBackStack.size(); 1167 if (N > 0) { 1168 backStack = new BackStackState[N]; 1169 for (int i=0; i<N; i++) { 1170 backStack[i] = new BackStackState(this, mBackStack.get(i)); 1171 if (DEBUG) Log.v(TAG, "saveAllState: adding back stack #" + i 1172 + ": " + mBackStack.get(i)); 1173 } 1174 } 1175 } 1176 1177 FragmentManagerState fms = new FragmentManagerState(); 1178 fms.mActive = active; 1179 fms.mAdded = added; 1180 fms.mBackStack = backStack; 1181 return fms; 1182 } 1183 1184 void restoreAllState(Parcelable state, ArrayList<Fragment> nonConfig) { 1185 // If there is no saved state at all, then there can not be 1186 // any nonConfig fragments either, so that is that. 1187 if (state == null) return; 1188 FragmentManagerState fms = (FragmentManagerState)state; 1189 if (fms.mActive == null) return; 1190 1191 // First re-attach any non-config instances we are retaining back 1192 // to their saved state, so we don't try to instantiate them again. 1193 if (nonConfig != null) { 1194 for (int i=0; i<nonConfig.size(); i++) { 1195 Fragment f = nonConfig.get(i); 1196 if (DEBUG) Log.v(TAG, "restoreAllState: re-attaching retained " + f); 1197 FragmentState fs = fms.mActive[f.mIndex]; 1198 fs.mInstance = f; 1199 f.mSavedViewState = null; 1200 f.mBackStackNesting = 0; 1201 f.mInLayout = false; 1202 f.mAdded = false; 1203 if (fs.mSavedFragmentState != null) { 1204 fs.mSavedFragmentState.setClassLoader(mActivity.getClassLoader()); 1205 f.mSavedViewState = fs.mSavedFragmentState.getSparseParcelableArray( 1206 FragmentManagerImpl.VIEW_STATE_TAG); 1207 } 1208 } 1209 } 1210 1211 // Build the full list of active fragments, instantiating them from 1212 // their saved state. 1213 mActive = new ArrayList<Fragment>(fms.mActive.length); 1214 if (mAvailIndices != null) { 1215 mAvailIndices.clear(); 1216 } 1217 for (int i=0; i<fms.mActive.length; i++) { 1218 FragmentState fs = fms.mActive[i]; 1219 if (fs != null) { 1220 Fragment f = fs.instantiate(mActivity); 1221 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": " + f); 1222 mActive.add(f); 1223 } else { 1224 if (DEBUG) Log.v(TAG, "restoreAllState: adding #" + i + ": (null)"); 1225 mActive.add(null); 1226 if (mAvailIndices == null) { 1227 mAvailIndices = new ArrayList<Integer>(); 1228 } 1229 if (DEBUG) Log.v(TAG, "restoreAllState: adding avail #" + i); 1230 mAvailIndices.add(i); 1231 } 1232 } 1233 1234 // Update the target of all retained fragments. 1235 if (nonConfig != null) { 1236 for (int i=0; i<nonConfig.size(); i++) { 1237 Fragment f = nonConfig.get(i); 1238 if (f.mTarget != null) { 1239 if (f.mTarget.mIndex < mActive.size()) { 1240 f.mTarget = mActive.get(f.mTarget.mIndex); 1241 } else { 1242 Log.w(TAG, "Re-attaching retained fragment " + f 1243 + " target no longer exists: " + f.mTarget); 1244 f.mTarget = null; 1245 } 1246 } 1247 } 1248 } 1249 1250 // Build the list of currently added fragments. 1251 if (fms.mAdded != null) { 1252 mAdded = new ArrayList<Fragment>(fms.mAdded.length); 1253 for (int i=0; i<fms.mAdded.length; i++) { 1254 Fragment f = mActive.get(fms.mAdded[i]); 1255 if (f == null) { 1256 throw new IllegalStateException( 1257 "No instantiated fragment for index #" + fms.mAdded[i]); 1258 } 1259 f.mAdded = true; 1260 f.mImmediateActivity = mActivity; 1261 if (DEBUG) Log.v(TAG, "restoreAllState: making added #" + i + ": " + f); 1262 mAdded.add(f); 1263 } 1264 } else { 1265 mAdded = null; 1266 } 1267 1268 // Build the back stack. 1269 if (fms.mBackStack != null) { 1270 mBackStack = new ArrayList<BackStackRecord>(fms.mBackStack.length); 1271 for (int i=0; i<fms.mBackStack.length; i++) { 1272 BackStackRecord bse = fms.mBackStack[i].instantiate(this); 1273 if (DEBUG) Log.v(TAG, "restoreAllState: adding bse #" + i 1274 + " (index " + bse.mIndex + "): " + bse); 1275 mBackStack.add(bse); 1276 if (bse.mIndex >= 0) { 1277 setBackStackIndex(bse.mIndex, bse); 1278 } 1279 } 1280 } else { 1281 mBackStack = null; 1282 } 1283 } 1284 1285 public void attachActivity(Activity activity) { 1286 if (mActivity != null) throw new IllegalStateException(); 1287 mActivity = activity; 1288 } 1289 1290 public void noteStateNotSaved() { 1291 mStateSaved = false; 1292 } 1293 1294 public void dispatchCreate() { 1295 mStateSaved = false; 1296 moveToState(Fragment.CREATED, false); 1297 } 1298 1299 public void dispatchActivityCreated() { 1300 mStateSaved = false; 1301 moveToState(Fragment.ACTIVITY_CREATED, false); 1302 } 1303 1304 public void dispatchStart() { 1305 mStateSaved = false; 1306 moveToState(Fragment.STARTED, false); 1307 } 1308 1309 public void dispatchResume() { 1310 mStateSaved = false; 1311 moveToState(Fragment.RESUMED, false); 1312 } 1313 1314 public void dispatchPause() { 1315 moveToState(Fragment.STARTED, false); 1316 } 1317 1318 public void dispatchStop() { 1319 moveToState(Fragment.ACTIVITY_CREATED, false); 1320 } 1321 1322 public void dispatchDestroy() { 1323 moveToState(Fragment.INITIALIZING, false); 1324 mActivity = null; 1325 } 1326 1327 public boolean dispatchCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1328 boolean show = false; 1329 ArrayList<Fragment> newMenus = null; 1330 if (mActive != null) { 1331 for (int i=0; i<mAdded.size(); i++) { 1332 Fragment f = mAdded.get(i); 1333 if (f != null && !f.mHidden && f.mHasMenu) { 1334 show = true; 1335 f.onCreateOptionsMenu(menu, inflater); 1336 if (newMenus == null) { 1337 newMenus = new ArrayList<Fragment>(); 1338 } 1339 newMenus.add(f); 1340 } 1341 } 1342 } 1343 1344 if (mCreatedMenus != null) { 1345 for (int i=0; i<mCreatedMenus.size(); i++) { 1346 Fragment f = mCreatedMenus.get(i); 1347 if (newMenus == null || !newMenus.contains(f)) { 1348 f.onDestroyOptionsMenu(); 1349 } 1350 } 1351 } 1352 1353 mCreatedMenus = newMenus; 1354 1355 return show; 1356 } 1357 1358 public boolean dispatchPrepareOptionsMenu(Menu menu) { 1359 boolean show = false; 1360 if (mActive != null) { 1361 for (int i=0; i<mAdded.size(); i++) { 1362 Fragment f = mAdded.get(i); 1363 if (f != null && !f.mHidden && f.mHasMenu) { 1364 show = true; 1365 f.onPrepareOptionsMenu(menu); 1366 } 1367 } 1368 } 1369 return show; 1370 } 1371 1372 public boolean dispatchOptionsItemSelected(MenuItem item) { 1373 if (mActive != null) { 1374 for (int i=0; i<mAdded.size(); i++) { 1375 Fragment f = mAdded.get(i); 1376 if (f != null && !f.mHidden && f.mHasMenu) { 1377 if (f.onOptionsItemSelected(item)) { 1378 return true; 1379 } 1380 } 1381 } 1382 } 1383 return false; 1384 } 1385 1386 public boolean dispatchContextItemSelected(MenuItem item) { 1387 if (mActive != null) { 1388 for (int i=0; i<mAdded.size(); i++) { 1389 Fragment f = mAdded.get(i); 1390 if (f != null && !f.mHidden) { 1391 if (f.onContextItemSelected(item)) { 1392 return true; 1393 } 1394 } 1395 } 1396 } 1397 return false; 1398 } 1399 1400 public void dispatchOptionsMenuClosed(Menu menu) { 1401 if (mActive != null) { 1402 for (int i=0; i<mAdded.size(); i++) { 1403 Fragment f = mAdded.get(i); 1404 if (f != null && !f.mHidden && f.mHasMenu) { 1405 f.onOptionsMenuClosed(menu); 1406 } 1407 } 1408 } 1409 } 1410 1411 public static int reverseTransit(int transit) { 1412 int rev = 0; 1413 switch (transit) { 1414 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1415 rev = FragmentTransaction.TRANSIT_FRAGMENT_CLOSE; 1416 break; 1417 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1418 rev = FragmentTransaction.TRANSIT_FRAGMENT_OPEN; 1419 break; 1420 case FragmentTransaction.TRANSIT_FRAGMENT_NEXT: 1421 rev = FragmentTransaction.TRANSIT_FRAGMENT_PREV; 1422 break; 1423 case FragmentTransaction.TRANSIT_FRAGMENT_PREV: 1424 rev = FragmentTransaction.TRANSIT_FRAGMENT_NEXT; 1425 break; 1426 } 1427 return rev; 1428 1429 } 1430 1431 public static int transitToStyleIndex(int transit, boolean enter) { 1432 int animAttr = -1; 1433 switch (transit) { 1434 case FragmentTransaction.TRANSIT_FRAGMENT_OPEN: 1435 animAttr = enter 1436 ? com.android.internal.R.styleable.FragmentAnimation_fragmentOpenEnterAnimation 1437 : com.android.internal.R.styleable.FragmentAnimation_fragmentOpenExitAnimation; 1438 break; 1439 case FragmentTransaction.TRANSIT_FRAGMENT_CLOSE: 1440 animAttr = enter 1441 ? com.android.internal.R.styleable.FragmentAnimation_fragmentCloseEnterAnimation 1442 : com.android.internal.R.styleable.FragmentAnimation_fragmentCloseExitAnimation; 1443 break; 1444 case FragmentTransaction.TRANSIT_FRAGMENT_NEXT: 1445 animAttr = enter 1446 ? com.android.internal.R.styleable.FragmentAnimation_fragmentNextEnterAnimation 1447 : com.android.internal.R.styleable.FragmentAnimation_fragmentNextExitAnimation; 1448 break; 1449 case FragmentTransaction.TRANSIT_FRAGMENT_PREV: 1450 animAttr = enter 1451 ? com.android.internal.R.styleable.FragmentAnimation_fragmentPrevEnterAnimation 1452 : com.android.internal.R.styleable.FragmentAnimation_fragmentPrevExitAnimation; 1453 break; 1454 } 1455 return animAttr; 1456 } 1457} 1458