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.app.Activity; 20import android.content.ComponentCallbacks; 21import android.content.Context; 22import android.content.Intent; 23import android.content.IntentSender; 24import android.content.res.Configuration; 25import android.content.res.Resources; 26import android.os.Bundle; 27import android.os.Parcel; 28import android.os.Parcelable; 29import android.support.annotation.CallSuper; 30import android.support.annotation.NonNull; 31import android.support.annotation.Nullable; 32import android.support.annotation.StringRes; 33import android.support.v4.util.SimpleArrayMap; 34import android.support.v4.util.DebugUtils; 35import android.support.v4.view.LayoutInflaterCompat; 36import android.util.AttributeSet; 37import android.util.Log; 38import android.util.SparseArray; 39import android.view.ContextMenu; 40import android.view.LayoutInflater; 41import android.view.Menu; 42import android.view.MenuInflater; 43import android.view.MenuItem; 44import android.view.View; 45import android.view.ViewGroup; 46import android.view.ContextMenu.ContextMenuInfo; 47import android.view.View.OnCreateContextMenuListener; 48import android.view.animation.Animation; 49import android.widget.AdapterView; 50 51import java.io.FileDescriptor; 52import java.io.PrintWriter; 53 54final class FragmentState implements Parcelable { 55 final String mClassName; 56 final int mIndex; 57 final boolean mFromLayout; 58 final int mFragmentId; 59 final int mContainerId; 60 final String mTag; 61 final boolean mRetainInstance; 62 final boolean mDetached; 63 final Bundle mArguments; 64 final boolean mHidden; 65 66 Bundle mSavedFragmentState; 67 68 Fragment mInstance; 69 70 public FragmentState(Fragment frag) { 71 mClassName = frag.getClass().getName(); 72 mIndex = frag.mIndex; 73 mFromLayout = frag.mFromLayout; 74 mFragmentId = frag.mFragmentId; 75 mContainerId = frag.mContainerId; 76 mTag = frag.mTag; 77 mRetainInstance = frag.mRetainInstance; 78 mDetached = frag.mDetached; 79 mArguments = frag.mArguments; 80 mHidden = frag.mHidden; 81 } 82 83 public FragmentState(Parcel in) { 84 mClassName = in.readString(); 85 mIndex = in.readInt(); 86 mFromLayout = in.readInt() != 0; 87 mFragmentId = in.readInt(); 88 mContainerId = in.readInt(); 89 mTag = in.readString(); 90 mRetainInstance = in.readInt() != 0; 91 mDetached = in.readInt() != 0; 92 mArguments = in.readBundle(); 93 mHidden = in.readInt() != 0; 94 mSavedFragmentState = in.readBundle(); 95 } 96 97 public Fragment instantiate(FragmentHostCallback host, Fragment parent, 98 FragmentManagerNonConfig childNonConfig) { 99 if (mInstance == null) { 100 final Context context = host.getContext(); 101 if (mArguments != null) { 102 mArguments.setClassLoader(context.getClassLoader()); 103 } 104 105 mInstance = Fragment.instantiate(context, mClassName, mArguments); 106 107 if (mSavedFragmentState != null) { 108 mSavedFragmentState.setClassLoader(context.getClassLoader()); 109 mInstance.mSavedFragmentState = mSavedFragmentState; 110 } 111 mInstance.setIndex(mIndex, parent); 112 mInstance.mFromLayout = mFromLayout; 113 mInstance.mRestored = true; 114 mInstance.mFragmentId = mFragmentId; 115 mInstance.mContainerId = mContainerId; 116 mInstance.mTag = mTag; 117 mInstance.mRetainInstance = mRetainInstance; 118 mInstance.mDetached = mDetached; 119 mInstance.mHidden = mHidden; 120 mInstance.mFragmentManager = host.mFragmentManager; 121 122 if (FragmentManagerImpl.DEBUG) Log.v(FragmentManagerImpl.TAG, 123 "Instantiated fragment " + mInstance); 124 } 125 mInstance.mChildNonConfig = childNonConfig; 126 return mInstance; 127 } 128 129 public int describeContents() { 130 return 0; 131 } 132 133 public void writeToParcel(Parcel dest, int flags) { 134 dest.writeString(mClassName); 135 dest.writeInt(mIndex); 136 dest.writeInt(mFromLayout ? 1 : 0); 137 dest.writeInt(mFragmentId); 138 dest.writeInt(mContainerId); 139 dest.writeString(mTag); 140 dest.writeInt(mRetainInstance ? 1 : 0); 141 dest.writeInt(mDetached ? 1 : 0); 142 dest.writeBundle(mArguments); 143 dest.writeInt(mHidden? 1 : 0); 144 dest.writeBundle(mSavedFragmentState); 145 } 146 147 public static final Parcelable.Creator<FragmentState> CREATOR 148 = new Parcelable.Creator<FragmentState>() { 149 public FragmentState createFromParcel(Parcel in) { 150 return new FragmentState(in); 151 } 152 153 public FragmentState[] newArray(int size) { 154 return new FragmentState[size]; 155 } 156 }; 157} 158 159/** 160 * Static library support version of the framework's {@link android.app.Fragment}. 161 * Used to write apps that run on platforms prior to Android 3.0. When running 162 * on Android 3.0 or above, this implementation is still used; it does not try 163 * to switch to the framework's implementation. See the framework {@link android.app.Fragment} 164 * documentation for a class overview. 165 * 166 * <p>The main differences when using this support version instead of the framework version are: 167 * <ul> 168 * <li>Your activity must extend {@link FragmentActivity} 169 * <li>You must call {@link FragmentActivity#getSupportFragmentManager} to get the 170 * {@link FragmentManager} 171 * </ul> 172 * 173 */ 174public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener { 175 private static final SimpleArrayMap<String, Class<?>> sClassMap = 176 new SimpleArrayMap<String, Class<?>>(); 177 178 static final Object USE_DEFAULT_TRANSITION = new Object(); 179 180 static final int INITIALIZING = 0; // Not yet created. 181 static final int CREATED = 1; // Created. 182 static final int ACTIVITY_CREATED = 2; // The activity has finished its creation. 183 static final int STOPPED = 3; // Fully created, not started. 184 static final int STARTED = 4; // Created and started, not resumed. 185 static final int RESUMED = 5; // Created started and resumed. 186 187 int mState = INITIALIZING; 188 189 // Non-null if the fragment's view hierarchy is currently animating away, 190 // meaning we need to wait a bit on completely destroying it. This is the 191 // view that is animating. 192 View mAnimatingAway; 193 194 // If mAnimatingAway != null, this is the state we should move to once the 195 // animation is done. 196 int mStateAfterAnimating; 197 198 // When instantiated from saved state, this is the saved state. 199 Bundle mSavedFragmentState; 200 SparseArray<Parcelable> mSavedViewState; 201 202 // Index into active fragment array. 203 int mIndex = -1; 204 205 // Internal unique name for this fragment; 206 String mWho; 207 208 // Construction arguments; 209 Bundle mArguments; 210 211 // Target fragment. 212 Fragment mTarget; 213 214 // For use when retaining a fragment: this is the index of the last mTarget. 215 int mTargetIndex = -1; 216 217 // Target request code. 218 int mTargetRequestCode; 219 220 // True if the fragment is in the list of added fragments. 221 boolean mAdded; 222 223 // If set this fragment is being removed from its activity. 224 boolean mRemoving; 225 226 // Set to true if this fragment was instantiated from a layout file. 227 boolean mFromLayout; 228 229 // Set to true when the view has actually been inflated in its layout. 230 boolean mInLayout; 231 232 // True if this fragment has been restored from previously saved state. 233 boolean mRestored; 234 235 // Number of active back stack entries this fragment is in. 236 int mBackStackNesting; 237 238 // The fragment manager we are associated with. Set as soon as the 239 // fragment is used in a transaction; cleared after it has been removed 240 // from all transactions. 241 FragmentManagerImpl mFragmentManager; 242 243 // Host this fragment is attached to. 244 FragmentHostCallback mHost; 245 246 // Private fragment manager for child fragments inside of this one. 247 FragmentManagerImpl mChildFragmentManager; 248 249 // For use when restoring fragment state and descendant fragments are retained. 250 // This state is set by FragmentState.instantiate and cleared in onCreate. 251 FragmentManagerNonConfig mChildNonConfig; 252 253 // If this Fragment is contained in another Fragment, this is that container. 254 Fragment mParentFragment; 255 256 // The optional identifier for this fragment -- either the container ID if it 257 // was dynamically added to the view hierarchy, or the ID supplied in 258 // layout. 259 int mFragmentId; 260 261 // When a fragment is being dynamically added to the view hierarchy, this 262 // is the identifier of the parent container it is being added to. 263 int mContainerId; 264 265 // The optional named tag for this fragment -- usually used to find 266 // fragments that are not part of the layout. 267 String mTag; 268 269 // Set to true when the app has requested that this fragment be hidden 270 // from the user. 271 boolean mHidden; 272 273 // Set to true when the app has requested that this fragment be deactivated. 274 boolean mDetached; 275 276 // If set this fragment would like its instance retained across 277 // configuration changes. 278 boolean mRetainInstance; 279 280 // If set this fragment is being retained across the current config change. 281 boolean mRetaining; 282 283 // If set this fragment has menu items to contribute. 284 boolean mHasMenu; 285 286 // Set to true to allow the fragment's menu to be shown. 287 boolean mMenuVisible = true; 288 289 // Used to verify that subclasses call through to super class. 290 boolean mCalled; 291 292 // If app has requested a specific animation, this is the one to use. 293 int mNextAnim; 294 295 // The parent container of the fragment after dynamically added to UI. 296 ViewGroup mContainer; 297 298 // The View generated for this fragment. 299 View mView; 300 301 // The real inner view that will save/restore state. 302 View mInnerView; 303 304 // Whether this fragment should defer starting until after other fragments 305 // have been started and their loaders are finished. 306 boolean mDeferStart; 307 308 // Hint provided by the app that this fragment is currently visible to the user. 309 boolean mUserVisibleHint = true; 310 311 LoaderManagerImpl mLoaderManager; 312 boolean mLoadersStarted; 313 boolean mCheckedForLoaderManager; 314 315 Object mEnterTransition = null; 316 Object mReturnTransition = USE_DEFAULT_TRANSITION; 317 Object mExitTransition = null; 318 Object mReenterTransition = USE_DEFAULT_TRANSITION; 319 Object mSharedElementEnterTransition = null; 320 Object mSharedElementReturnTransition = USE_DEFAULT_TRANSITION; 321 Boolean mAllowReturnTransitionOverlap; 322 Boolean mAllowEnterTransitionOverlap; 323 324 SharedElementCallback mEnterTransitionCallback = null; 325 SharedElementCallback mExitTransitionCallback = null; 326 327 /** 328 * State information that has been retrieved from a fragment instance 329 * through {@link FragmentManager#saveFragmentInstanceState(Fragment) 330 * FragmentManager.saveFragmentInstanceState}. 331 */ 332 public static class SavedState implements Parcelable { 333 final Bundle mState; 334 335 SavedState(Bundle state) { 336 mState = state; 337 } 338 339 SavedState(Parcel in, ClassLoader loader) { 340 mState = in.readBundle(); 341 if (loader != null && mState != null) { 342 mState.setClassLoader(loader); 343 } 344 } 345 346 @Override 347 public int describeContents() { 348 return 0; 349 } 350 351 @Override 352 public void writeToParcel(Parcel dest, int flags) { 353 dest.writeBundle(mState); 354 } 355 356 public static final Parcelable.Creator<SavedState> CREATOR 357 = new Parcelable.Creator<SavedState>() { 358 @Override 359 public SavedState createFromParcel(Parcel in) { 360 return new SavedState(in, null); 361 } 362 363 @Override 364 public SavedState[] newArray(int size) { 365 return new SavedState[size]; 366 } 367 }; 368 } 369 370 /** 371 * Thrown by {@link Fragment#instantiate(Context, String, Bundle)} when 372 * there is an instantiation failure. 373 */ 374 static public class InstantiationException extends RuntimeException { 375 public InstantiationException(String msg, Exception cause) { 376 super(msg, cause); 377 } 378 } 379 380 /** 381 * Default constructor. <strong>Every</strong> fragment must have an 382 * empty constructor, so it can be instantiated when restoring its 383 * activity's state. It is strongly recommended that subclasses do not 384 * have other constructors with parameters, since these constructors 385 * will not be called when the fragment is re-instantiated; instead, 386 * arguments can be supplied by the caller with {@link #setArguments} 387 * and later retrieved by the Fragment with {@link #getArguments}. 388 * 389 * <p>Applications should generally not implement a constructor. The 390 * first place application code an run where the fragment is ready to 391 * be used is in {@link #onAttach(Activity)}, the point where the fragment 392 * is actually associated with its activity. Some applications may also 393 * want to implement {@link #onInflate} to retrieve attributes from a 394 * layout resource, though should take care here because this happens for 395 * the fragment is attached to its activity. 396 */ 397 public Fragment() { 398 } 399 400 /** 401 * Like {@link #instantiate(Context, String, Bundle)} but with a null 402 * argument Bundle. 403 */ 404 public static Fragment instantiate(Context context, String fname) { 405 return instantiate(context, fname, null); 406 } 407 408 /** 409 * Create a new instance of a Fragment with the given class name. This is 410 * the same as calling its empty constructor. 411 * 412 * @param context The calling context being used to instantiate the fragment. 413 * This is currently just used to get its ClassLoader. 414 * @param fname The class name of the fragment to instantiate. 415 * @param args Bundle of arguments to supply to the fragment, which it 416 * can retrieve with {@link #getArguments()}. May be null. 417 * @return Returns a new fragment instance. 418 * @throws InstantiationException If there is a failure in instantiating 419 * the given fragment class. This is a runtime exception; it is not 420 * normally expected to happen. 421 */ 422 public static Fragment instantiate(Context context, String fname, @Nullable Bundle args) { 423 try { 424 Class<?> clazz = sClassMap.get(fname); 425 if (clazz == null) { 426 // Class not found in the cache, see if it's real, and try to add it 427 clazz = context.getClassLoader().loadClass(fname); 428 sClassMap.put(fname, clazz); 429 } 430 Fragment f = (Fragment)clazz.newInstance(); 431 if (args != null) { 432 args.setClassLoader(f.getClass().getClassLoader()); 433 f.mArguments = args; 434 } 435 return f; 436 } catch (ClassNotFoundException e) { 437 throw new InstantiationException("Unable to instantiate fragment " + fname 438 + ": make sure class name exists, is public, and has an" 439 + " empty constructor that is public", e); 440 } catch (java.lang.InstantiationException e) { 441 throw new InstantiationException("Unable to instantiate fragment " + fname 442 + ": make sure class name exists, is public, and has an" 443 + " empty constructor that is public", e); 444 } catch (IllegalAccessException e) { 445 throw new InstantiationException("Unable to instantiate fragment " + fname 446 + ": make sure class name exists, is public, and has an" 447 + " empty constructor that is public", e); 448 } 449 } 450 451 /** 452 * Determine if the given fragment name is a support library fragment class. 453 * 454 * @param context Context used to determine the correct ClassLoader to use 455 * @param fname Class name of the fragment to test 456 * @return true if <code>fname</code> is <code>android.support.v4.app.Fragment</code> 457 * or a subclass, false otherwise. 458 */ 459 static boolean isSupportFragmentClass(Context context, String fname) { 460 try { 461 Class<?> clazz = sClassMap.get(fname); 462 if (clazz == null) { 463 // Class not found in the cache, see if it's real, and try to add it 464 clazz = context.getClassLoader().loadClass(fname); 465 sClassMap.put(fname, clazz); 466 } 467 return Fragment.class.isAssignableFrom(clazz); 468 } catch (ClassNotFoundException e) { 469 return false; 470 } 471 } 472 473 final void restoreViewState(Bundle savedInstanceState) { 474 if (mSavedViewState != null) { 475 mInnerView.restoreHierarchyState(mSavedViewState); 476 mSavedViewState = null; 477 } 478 mCalled = false; 479 onViewStateRestored(savedInstanceState); 480 if (!mCalled) { 481 throw new SuperNotCalledException("Fragment " + this 482 + " did not call through to super.onViewStateRestored()"); 483 } 484 } 485 486 final void setIndex(int index, Fragment parent) { 487 mIndex = index; 488 if (parent != null) { 489 mWho = parent.mWho + ":" + mIndex; 490 } else { 491 mWho = "android:fragment:" + mIndex; 492 } 493 } 494 495 final boolean isInBackStack() { 496 return mBackStackNesting > 0; 497 } 498 499 /** 500 * Subclasses can not override equals(). 501 */ 502 @Override final public boolean equals(Object o) { 503 return super.equals(o); 504 } 505 506 /** 507 * Subclasses can not override hashCode(). 508 */ 509 @Override final public int hashCode() { 510 return super.hashCode(); 511 } 512 513 @Override 514 public String toString() { 515 StringBuilder sb = new StringBuilder(128); 516 DebugUtils.buildShortClassTag(this, sb); 517 if (mIndex >= 0) { 518 sb.append(" #"); 519 sb.append(mIndex); 520 } 521 if (mFragmentId != 0) { 522 sb.append(" id=0x"); 523 sb.append(Integer.toHexString(mFragmentId)); 524 } 525 if (mTag != null) { 526 sb.append(" "); 527 sb.append(mTag); 528 } 529 sb.append('}'); 530 return sb.toString(); 531 } 532 533 /** 534 * Return the identifier this fragment is known by. This is either 535 * the android:id value supplied in a layout or the container view ID 536 * supplied when adding the fragment. 537 */ 538 final public int getId() { 539 return mFragmentId; 540 } 541 542 /** 543 * Get the tag name of the fragment, if specified. 544 */ 545 final public String getTag() { 546 return mTag; 547 } 548 549 /** 550 * Supply the construction arguments for this fragment. This can only 551 * be called before the fragment has been attached to its activity; that 552 * is, you should call it immediately after constructing the fragment. The 553 * arguments supplied here will be retained across fragment destroy and 554 * creation. 555 */ 556 public void setArguments(Bundle args) { 557 if (mIndex >= 0) { 558 throw new IllegalStateException("Fragment already active"); 559 } 560 mArguments = args; 561 } 562 563 /** 564 * Return the arguments supplied when the fragment was instantiated, 565 * if any. 566 */ 567 final public Bundle getArguments() { 568 return mArguments; 569 } 570 571 /** 572 * Set the initial saved state that this Fragment should restore itself 573 * from when first being constructed, as returned by 574 * {@link FragmentManager#saveFragmentInstanceState(Fragment) 575 * FragmentManager.saveFragmentInstanceState}. 576 * 577 * @param state The state the fragment should be restored from. 578 */ 579 public void setInitialSavedState(SavedState state) { 580 if (mIndex >= 0) { 581 throw new IllegalStateException("Fragment already active"); 582 } 583 mSavedFragmentState = state != null && state.mState != null 584 ? state.mState : null; 585 } 586 587 /** 588 * Optional target for this fragment. This may be used, for example, 589 * if this fragment is being started by another, and when done wants to 590 * give a result back to the first. The target set here is retained 591 * across instances via {@link FragmentManager#putFragment 592 * FragmentManager.putFragment()}. 593 * 594 * @param fragment The fragment that is the target of this one. 595 * @param requestCode Optional request code, for convenience if you 596 * are going to call back with {@link #onActivityResult(int, int, Intent)}. 597 */ 598 public void setTargetFragment(Fragment fragment, int requestCode) { 599 mTarget = fragment; 600 mTargetRequestCode = requestCode; 601 } 602 603 /** 604 * Return the target fragment set by {@link #setTargetFragment}. 605 */ 606 final public Fragment getTargetFragment() { 607 return mTarget; 608 } 609 610 /** 611 * Return the target request code set by {@link #setTargetFragment}. 612 */ 613 final public int getTargetRequestCode() { 614 return mTargetRequestCode; 615 } 616 617 /** 618 * Return the {@link Context} this fragment is currently associated with. 619 */ 620 public Context getContext() { 621 return mHost == null ? null : mHost.getContext(); 622 } 623 624 /** 625 * Return the {@link FragmentActivity} this fragment is currently associated with. 626 * May return {@code null} if the fragment is associated with a {@link Context} 627 * instead. 628 */ 629 final public FragmentActivity getActivity() { 630 return mHost == null ? null : (FragmentActivity) mHost.getActivity(); 631 } 632 633 /** 634 * Return the host object of this fragment. May return {@code null} if the fragment 635 * isn't currently being hosted. 636 */ 637 final public Object getHost() { 638 return mHost == null ? null : mHost.onGetHost(); 639 } 640 641 /** 642 * Return <code>getActivity().getResources()</code>. 643 */ 644 final public Resources getResources() { 645 if (mHost == null) { 646 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 647 } 648 return mHost.getContext().getResources(); 649 } 650 651 /** 652 * Return a localized, styled CharSequence from the application's package's 653 * default string table. 654 * 655 * @param resId Resource id for the CharSequence text 656 */ 657 public final CharSequence getText(@StringRes int resId) { 658 return getResources().getText(resId); 659 } 660 661 /** 662 * Return a localized string from the application's package's 663 * default string table. 664 * 665 * @param resId Resource id for the string 666 */ 667 public final String getString(@StringRes int resId) { 668 return getResources().getString(resId); 669 } 670 671 /** 672 * Return a localized formatted string from the application's package's 673 * default string table, substituting the format arguments as defined in 674 * {@link java.util.Formatter} and {@link java.lang.String#format}. 675 * 676 * @param resId Resource id for the format string 677 * @param formatArgs The format arguments that will be used for substitution. 678 */ 679 680 public final String getString(@StringRes int resId, Object... formatArgs) { 681 return getResources().getString(resId, formatArgs); 682 } 683 684 /** 685 * Return the FragmentManager for interacting with fragments associated 686 * with this fragment's activity. Note that this will be non-null slightly 687 * before {@link #getActivity()}, during the time from when the fragment is 688 * placed in a {@link FragmentTransaction} until it is committed and 689 * attached to its activity. 690 * 691 * <p>If this Fragment is a child of another Fragment, the FragmentManager 692 * returned here will be the parent's {@link #getChildFragmentManager()}. 693 */ 694 final public FragmentManager getFragmentManager() { 695 return mFragmentManager; 696 } 697 698 /** 699 * Return a private FragmentManager for placing and managing Fragments 700 * inside of this Fragment. 701 */ 702 final public FragmentManager getChildFragmentManager() { 703 if (mChildFragmentManager == null) { 704 instantiateChildFragmentManager(); 705 if (mState >= RESUMED) { 706 mChildFragmentManager.dispatchResume(); 707 } else if (mState >= STARTED) { 708 mChildFragmentManager.dispatchStart(); 709 } else if (mState >= ACTIVITY_CREATED) { 710 mChildFragmentManager.dispatchActivityCreated(); 711 } else if (mState >= CREATED) { 712 mChildFragmentManager.dispatchCreate(); 713 } 714 } 715 return mChildFragmentManager; 716 } 717 718 /** 719 * Returns the parent Fragment containing this Fragment. If this Fragment 720 * is attached directly to an Activity, returns null. 721 */ 722 final public Fragment getParentFragment() { 723 return mParentFragment; 724 } 725 726 /** 727 * Return true if the fragment is currently added to its activity. 728 */ 729 final public boolean isAdded() { 730 return mHost != null && mAdded; 731 } 732 733 /** 734 * Return true if the fragment has been explicitly detached from the UI. 735 * That is, {@link FragmentTransaction#detach(Fragment) 736 * FragmentTransaction.detach(Fragment)} has been used on it. 737 */ 738 final public boolean isDetached() { 739 return mDetached; 740 } 741 742 /** 743 * Return true if this fragment is currently being removed from its 744 * activity. This is <em>not</em> whether its activity is finishing, but 745 * rather whether it is in the process of being removed from its activity. 746 */ 747 final public boolean isRemoving() { 748 return mRemoving; 749 } 750 751 /** 752 * Return true if the layout is included as part of an activity view 753 * hierarchy via the <fragment> tag. This will always be true when 754 * fragments are created through the <fragment> tag, <em>except</em> 755 * in the case where an old fragment is restored from a previous state and 756 * it does not appear in the layout of the current state. 757 */ 758 final public boolean isInLayout() { 759 return mInLayout; 760 } 761 762 /** 763 * Return true if the fragment is in the resumed state. This is true 764 * for the duration of {@link #onResume()} and {@link #onPause()} as well. 765 */ 766 final public boolean isResumed() { 767 return mState >= RESUMED; 768 } 769 770 /** 771 * Return true if the fragment is currently visible to the user. This means 772 * it: (1) has been added, (2) has its view attached to the window, and 773 * (3) is not hidden. 774 */ 775 final public boolean isVisible() { 776 return isAdded() && !isHidden() && mView != null 777 && mView.getWindowToken() != null && mView.getVisibility() == View.VISIBLE; 778 } 779 780 /** 781 * Return true if the fragment has been hidden. By default fragments 782 * are shown. You can find out about changes to this state with 783 * {@link #onHiddenChanged}. Note that the hidden state is orthogonal 784 * to other states -- that is, to be visible to the user, a fragment 785 * must be both started and not hidden. 786 */ 787 final public boolean isHidden() { 788 return mHidden; 789 } 790 791 /** @hide */ 792 final public boolean hasOptionsMenu() { 793 return mHasMenu; 794 } 795 796 /** @hide */ 797 final public boolean isMenuVisible() { 798 return mMenuVisible; 799 } 800 801 /** 802 * Called when the hidden state (as returned by {@link #isHidden()} of 803 * the fragment has changed. Fragments start out not hidden; this will 804 * be called whenever the fragment changes state from that. 805 * @param hidden True if the fragment is now hidden, false if it is not 806 * visible. 807 */ 808 public void onHiddenChanged(boolean hidden) { 809 } 810 811 /** 812 * Control whether a fragment instance is retained across Activity 813 * re-creation (such as from a configuration change). This can only 814 * be used with fragments not in the back stack. If set, the fragment 815 * lifecycle will be slightly different when an activity is recreated: 816 * <ul> 817 * <li> {@link #onDestroy()} will not be called (but {@link #onDetach()} still 818 * will be, because the fragment is being detached from its current activity). 819 * <li> {@link #onCreate(Bundle)} will not be called since the fragment 820 * is not being re-created. 821 * <li> {@link #onAttach(Activity)} and {@link #onActivityCreated(Bundle)} <b>will</b> 822 * still be called. 823 * </ul> 824 */ 825 public void setRetainInstance(boolean retain) { 826 mRetainInstance = retain; 827 } 828 829 final public boolean getRetainInstance() { 830 return mRetainInstance; 831 } 832 833 /** 834 * Report that this fragment would like to participate in populating 835 * the options menu by receiving a call to {@link #onCreateOptionsMenu} 836 * and related methods. 837 * 838 * @param hasMenu If true, the fragment has menu items to contribute. 839 */ 840 public void setHasOptionsMenu(boolean hasMenu) { 841 if (mHasMenu != hasMenu) { 842 mHasMenu = hasMenu; 843 if (isAdded() && !isHidden()) { 844 mHost.onSupportInvalidateOptionsMenu(); 845 } 846 } 847 } 848 849 /** 850 * Set a hint for whether this fragment's menu should be visible. This 851 * is useful if you know that a fragment has been placed in your view 852 * hierarchy so that the user can not currently seen it, so any menu items 853 * it has should also not be shown. 854 * 855 * @param menuVisible The default is true, meaning the fragment's menu will 856 * be shown as usual. If false, the user will not see the menu. 857 */ 858 public void setMenuVisibility(boolean menuVisible) { 859 if (mMenuVisible != menuVisible) { 860 mMenuVisible = menuVisible; 861 if (mHasMenu && isAdded() && !isHidden()) { 862 mHost.onSupportInvalidateOptionsMenu(); 863 } 864 } 865 } 866 867 /** 868 * Set a hint to the system about whether this fragment's UI is currently visible 869 * to the user. This hint defaults to true and is persistent across fragment instance 870 * state save and restore. 871 * 872 * <p>An app may set this to false to indicate that the fragment's UI is 873 * scrolled out of visibility or is otherwise not directly visible to the user. 874 * This may be used by the system to prioritize operations such as fragment lifecycle updates 875 * or loader ordering behavior.</p> 876 * 877 * @param isVisibleToUser true if this fragment's UI is currently visible to the user (default), 878 * false if it is not. 879 */ 880 public void setUserVisibleHint(boolean isVisibleToUser) { 881 if (!mUserVisibleHint && isVisibleToUser && mState < STARTED 882 && mFragmentManager != null && isAdded()) { 883 mFragmentManager.performPendingDeferredStart(this); 884 } 885 mUserVisibleHint = isVisibleToUser; 886 mDeferStart = mState < STARTED && !isVisibleToUser; 887 } 888 889 /** 890 * @return The current value of the user-visible hint on this fragment. 891 * @see #setUserVisibleHint(boolean) 892 */ 893 public boolean getUserVisibleHint() { 894 return mUserVisibleHint; 895 } 896 897 /** 898 * Return the LoaderManager for this fragment, creating it if needed. 899 */ 900 public LoaderManager getLoaderManager() { 901 if (mLoaderManager != null) { 902 return mLoaderManager; 903 } 904 if (mHost == null) { 905 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 906 } 907 mCheckedForLoaderManager = true; 908 mLoaderManager = mHost.getLoaderManager(mWho, mLoadersStarted, true); 909 return mLoaderManager; 910 } 911 912 /** 913 * Call {@link Activity#startActivity(Intent)} from the fragment's 914 * containing Activity. 915 */ 916 public void startActivity(Intent intent) { 917 startActivity(intent, null); 918 } 919 920 /** 921 * Call {@link Activity#startActivity(Intent, Bundle)} from the fragment's 922 * containing Activity. 923 */ 924 public void startActivity(Intent intent, @Nullable Bundle options) { 925 if (mHost == null) { 926 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 927 } 928 mHost.onStartActivityFromFragment(this /*fragment*/, intent, -1, options); 929 } 930 931 /** 932 * Call {@link Activity#startActivityForResult(Intent, int)} from the fragment's 933 * containing Activity. 934 */ 935 public void startActivityForResult(Intent intent, int requestCode) { 936 startActivityForResult(intent, requestCode, null); 937 } 938 939 /** 940 * Call {@link Activity#startActivityForResult(Intent, int, Bundle)} from the fragment's 941 * containing Activity. 942 */ 943 public void startActivityForResult(Intent intent, int requestCode, @Nullable Bundle options) { 944 if (mHost == null) { 945 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 946 } 947 mHost.onStartActivityFromFragment(this /*fragment*/, intent, requestCode, options); 948 } 949 950 /** 951 * Call {@link Activity#startIntentSenderForResult(IntentSender, int, Intent, int, int, int, 952 * Bundle)} from the fragment's containing Activity. 953 */ 954 public void startIntentSenderForResult(IntentSender intent, int requestCode, 955 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 956 Bundle options) throws IntentSender.SendIntentException { 957 if (mHost == null) { 958 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 959 } 960 mHost.onStartIntentSenderFromFragment(this, intent, requestCode, fillInIntent, flagsMask, 961 flagsValues, extraFlags, options); 962 } 963 964 /** 965 * Receive the result from a previous call to 966 * {@link #startActivityForResult(Intent, int)}. This follows the 967 * related Activity API as described there in 968 * {@link Activity#onActivityResult(int, int, Intent)}. 969 * 970 * @param requestCode The integer request code originally supplied to 971 * startActivityForResult(), allowing you to identify who this 972 * result came from. 973 * @param resultCode The integer result code returned by the child activity 974 * through its setResult(). 975 * @param data An Intent, which can return result data to the caller 976 * (various data can be attached to Intent "extras"). 977 */ 978 public void onActivityResult(int requestCode, int resultCode, Intent data) { 979 } 980 981 /** 982 * Requests permissions to be granted to this application. These permissions 983 * must be requested in your manifest, they should not be granted to your app, 984 * and they should have protection level {@link android.content.pm.PermissionInfo 985 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 986 * the platform or a third-party app. 987 * <p> 988 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 989 * are granted at install time if requested in the manifest. Signature permissions 990 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 991 * install time if requested in the manifest and the signature of your app matches 992 * the signature of the app declaring the permissions. 993 * </p> 994 * <p> 995 * If your app does not have the requested permissions the user will be presented 996 * with UI for accepting them. After the user has accepted or rejected the 997 * requested permissions you will receive a callback on {@link 998 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 999 * permissions were granted or not. 1000 * </p> 1001 * <p> 1002 * Note that requesting a permission does not guarantee it will be granted and 1003 * your app should be able to run without having this permission. 1004 * </p> 1005 * <p> 1006 * This method may start an activity allowing the user to choose which permissions 1007 * to grant and which to reject. Hence, you should be prepared that your activity 1008 * may be paused and resumed. Further, granting some permissions may require 1009 * a restart of you application. In such a case, the system will recreate the 1010 * activity stack before delivering the result to {@link 1011 * #onRequestPermissionsResult(int, String[], int[])}. 1012 * </p> 1013 * <p> 1014 * When checking whether you have a permission you should use {@link 1015 * android.content.Context#checkSelfPermission(String)}. 1016 * </p> 1017 * <p> 1018 * Calling this API for permissions already granted to your app would show UI 1019 * to the user to decided whether the app can still hold these permissions. This 1020 * can be useful if the way your app uses the data guarded by the permissions 1021 * changes significantly. 1022 * </p> 1023 * <p> 1024 * A sample permissions request looks like this: 1025 * </p> 1026 * <code><pre><p> 1027 * private void showContacts() { 1028 * if (getActivity().checkSelfPermission(Manifest.permission.READ_CONTACTS) 1029 * != PackageManager.PERMISSION_GRANTED) { 1030 * requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, 1031 * PERMISSIONS_REQUEST_READ_CONTACTS); 1032 * } else { 1033 * doShowContacts(); 1034 * } 1035 * } 1036 * 1037 * {@literal @}Override 1038 * public void onRequestPermissionsResult(int requestCode, String[] permissions, 1039 * int[] grantResults) { 1040 * if (requestCode == PERMISSIONS_REQUEST_READ_CONTACTS 1041 * && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 1042 * doShowContacts(); 1043 * } 1044 * } 1045 * </code></pre></p> 1046 * 1047 * @param permissions The requested permissions. 1048 * @param requestCode Application specific request code to match with a result 1049 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 1050 * 1051 * @see #onRequestPermissionsResult(int, String[], int[]) 1052 * @see android.content.Context#checkSelfPermission(String) 1053 */ 1054 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 1055 if (mHost == null) { 1056 throw new IllegalStateException("Fragment " + this + " not attached to Activity"); 1057 } 1058 mHost.onRequestPermissionsFromFragment(this, permissions, requestCode); 1059 } 1060 1061 /** 1062 * Callback for the result from requesting permissions. This method 1063 * is invoked for every call on {@link #requestPermissions(String[], int)}. 1064 * <p> 1065 * <strong>Note:</strong> It is possible that the permissions request interaction 1066 * with the user is interrupted. In this case you will receive empty permissions 1067 * and results arrays which should be treated as a cancellation. 1068 * </p> 1069 * 1070 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 1071 * @param permissions The requested permissions. Never null. 1072 * @param grantResults The grant results for the corresponding permissions 1073 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 1074 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 1075 * 1076 * @see #requestPermissions(String[], int) 1077 */ 1078 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 1079 @NonNull int[] grantResults) { 1080 /* callback - do nothing */ 1081 } 1082 1083 /** 1084 * Gets whether you should show UI with rationale for requesting a permission. 1085 * You should do this only if you do not have the permission and the context in 1086 * which the permission is requested does not clearly communicate to the user 1087 * what would be the benefit from granting this permission. 1088 * <p> 1089 * For example, if you write a camera app, requesting the camera permission 1090 * would be expected by the user and no rationale for why it is requested is 1091 * needed. If however, the app needs location for tagging photos then a non-tech 1092 * savvy user may wonder how location is related to taking photos. In this case 1093 * you may choose to show UI with rationale of requesting this permission. 1094 * </p> 1095 * 1096 * @param permission A permission your app wants to request. 1097 * @return Whether you can show permission rationale UI. 1098 * 1099 * @see Context#checkSelfPermission(String) 1100 * @see #requestPermissions(String[], int) 1101 * @see #onRequestPermissionsResult(int, String[], int[]) 1102 */ 1103 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 1104 if (mHost != null) { 1105 return mHost.onShouldShowRequestPermissionRationale(permission); 1106 } 1107 return false; 1108 } 1109 1110 /** 1111 * @hide Hack so that DialogFragment can make its Dialog before creating 1112 * its views, and the view construction can use the dialog's context for 1113 * inflation. Maybe this should become a public API. Note sure. 1114 */ 1115 public LayoutInflater getLayoutInflater(Bundle savedInstanceState) { 1116 LayoutInflater result = mHost.onGetLayoutInflater(); 1117 getChildFragmentManager(); // Init if needed; use raw implementation below. 1118 LayoutInflaterCompat.setFactory(result, mChildFragmentManager.getLayoutInflaterFactory()); 1119 return result; 1120 } 1121 1122 /** 1123 * Called when a fragment is being created as part of a view layout 1124 * inflation, typically from setting the content view of an activity. This 1125 * may be called immediately after the fragment is created from a <fragment> 1126 * tag in a layout file. Note this is <em>before</em> the fragment's 1127 * {@link #onAttach(Activity)} has been called; all you should do here is 1128 * parse the attributes and save them away. 1129 * 1130 * <p>This is called every time the fragment is inflated, even if it is 1131 * being inflated into a new instance with saved state. It typically makes 1132 * sense to re-parse the parameters each time, to allow them to change with 1133 * different configurations.</p> 1134 * 1135 * <p>Here is a typical implementation of a fragment that can take parameters 1136 * both through attributes supplied here as well from {@link #getArguments()}:</p> 1137 * 1138 * {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentArguments.java 1139 * fragment} 1140 * 1141 * <p>Note that parsing the XML attributes uses a "styleable" resource. The 1142 * declaration for the styleable used here is:</p> 1143 * 1144 * {@sample development/samples/ApiDemos/res/values/attrs.xml fragment_arguments} 1145 * 1146 * <p>The fragment can then be declared within its activity's content layout 1147 * through a tag like this:</p> 1148 * 1149 * {@sample development/samples/ApiDemos/res/layout/fragment_arguments.xml from_attributes} 1150 * 1151 * <p>This fragment can also be created dynamically from arguments given 1152 * at runtime in the arguments Bundle; here is an example of doing so at 1153 * creation of the containing activity:</p> 1154 * 1155 * {@sample development/samples/ApiDemos/src/com/example/android/apis/app/FragmentArguments.java 1156 * create} 1157 * 1158 * @param context The Activity that is inflating this fragment. 1159 * @param attrs The attributes at the tag where the fragment is 1160 * being created. 1161 * @param savedInstanceState If the fragment is being re-created from 1162 * a previous saved state, this is the state. 1163 */ 1164 @CallSuper 1165 public void onInflate(Context context, AttributeSet attrs, Bundle savedInstanceState) { 1166 mCalled = true; 1167 final Activity hostActivity = mHost == null ? null : mHost.getActivity(); 1168 if (hostActivity != null) { 1169 mCalled = false; 1170 onInflate(hostActivity, attrs, savedInstanceState); 1171 } 1172 } 1173 1174 /** 1175 * Called when a fragment is being created as part of a view layout 1176 * inflation, typically from setting the content view of an activity. 1177 * 1178 * @deprecated See {@link #onInflate(Context, AttributeSet, Bundle)}. 1179 */ 1180 @Deprecated 1181 @CallSuper 1182 public void onInflate(Activity activity, AttributeSet attrs, Bundle savedInstanceState) { 1183 mCalled = true; 1184 } 1185 1186 /** 1187 * Called when a fragment is attached as a child of this fragment. 1188 * 1189 * <p>This is called after the attached fragment's <code>onAttach</code> and before 1190 * the attached fragment's <code>onCreate</code> if the fragment has not yet had a previous 1191 * call to <code>onCreate</code>.</p> 1192 * 1193 * @param childFragment child fragment being attached 1194 */ 1195 public void onAttachFragment(Fragment childFragment) { 1196 } 1197 1198 /** 1199 * Called when a fragment is first attached to its context. 1200 * {@link #onCreate(Bundle)} will be called after this. 1201 */ 1202 @CallSuper 1203 public void onAttach(Context context) { 1204 mCalled = true; 1205 final Activity hostActivity = mHost == null ? null : mHost.getActivity(); 1206 if (hostActivity != null) { 1207 mCalled = false; 1208 onAttach(hostActivity); 1209 } 1210 } 1211 1212 /** 1213 * Called when a fragment is first attached to its activity. 1214 * {@link #onCreate(Bundle)} will be called after this. 1215 * 1216 * @deprecated See {@link #onAttach(Context)}. 1217 */ 1218 @Deprecated 1219 @CallSuper 1220 public void onAttach(Activity activity) { 1221 mCalled = true; 1222 } 1223 1224 /** 1225 * Called when a fragment loads an animation. 1226 */ 1227 public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) { 1228 return null; 1229 } 1230 1231 /** 1232 * Called to do initial creation of a fragment. This is called after 1233 * {@link #onAttach(Activity)} and before 1234 * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}. 1235 * 1236 * <p>Note that this can be called while the fragment's activity is 1237 * still in the process of being created. As such, you can not rely 1238 * on things like the activity's content view hierarchy being initialized 1239 * at this point. If you want to do work once the activity itself is 1240 * created, see {@link #onActivityCreated(Bundle)}. 1241 * 1242 * <p>Any restored child fragments will be created before the base 1243 * <code>Fragment.onCreate</code> method returns.</p> 1244 * 1245 * @param savedInstanceState If the fragment is being re-created from 1246 * a previous saved state, this is the state. 1247 */ 1248 @CallSuper 1249 public void onCreate(@Nullable Bundle savedInstanceState) { 1250 mCalled = true; 1251 restoreChildFragmentState(savedInstanceState); 1252 if (mChildFragmentManager != null 1253 && !mChildFragmentManager.isStateAtLeast(Fragment.CREATED)) { 1254 mChildFragmentManager.dispatchCreate(); 1255 } 1256 } 1257 1258 /** 1259 * Restore the state of the child FragmentManager. Called by either 1260 * {@link #onCreate(Bundle)} for non-retained instance fragments or by 1261 * {@link FragmentManagerImpl#moveToState(Fragment, int, int, int, boolean)} 1262 * for retained instance fragments. 1263 * 1264 * <p><strong>Postcondition:</strong> if there were child fragments to restore, 1265 * the child FragmentManager will be instantiated and brought to the {@link #CREATED} state. 1266 * </p> 1267 * 1268 * @param savedInstanceState the savedInstanceState potentially containing fragment info 1269 */ 1270 void restoreChildFragmentState(@Nullable Bundle savedInstanceState) { 1271 if (savedInstanceState != null) { 1272 Parcelable p = savedInstanceState.getParcelable( 1273 FragmentActivity.FRAGMENTS_TAG); 1274 if (p != null) { 1275 if (mChildFragmentManager == null) { 1276 instantiateChildFragmentManager(); 1277 } 1278 mChildFragmentManager.restoreAllState(p, mChildNonConfig); 1279 mChildNonConfig = null; 1280 mChildFragmentManager.dispatchCreate(); 1281 } 1282 } 1283 } 1284 1285 /** 1286 * Called to have the fragment instantiate its user interface view. 1287 * This is optional, and non-graphical fragments can return null (which 1288 * is the default implementation). This will be called between 1289 * {@link #onCreate(Bundle)} and {@link #onActivityCreated(Bundle)}. 1290 * 1291 * <p>If you return a View from here, you will later be called in 1292 * {@link #onDestroyView} when the view is being released. 1293 * 1294 * @param inflater The LayoutInflater object that can be used to inflate 1295 * any views in the fragment, 1296 * @param container If non-null, this is the parent view that the fragment's 1297 * UI should be attached to. The fragment should not add the view itself, 1298 * but this can be used to generate the LayoutParams of the view. 1299 * @param savedInstanceState If non-null, this fragment is being re-constructed 1300 * from a previous saved state as given here. 1301 * 1302 * @return Return the View for the fragment's UI, or null. 1303 */ 1304 @Nullable 1305 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 1306 @Nullable Bundle savedInstanceState) { 1307 return null; 1308 } 1309 1310 /** 1311 * Called immediately after {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} 1312 * has returned, but before any saved state has been restored in to the view. 1313 * This gives subclasses a chance to initialize themselves once 1314 * they know their view hierarchy has been completely created. The fragment's 1315 * view hierarchy is not however attached to its parent at this point. 1316 * @param view The View returned by {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}. 1317 * @param savedInstanceState If non-null, this fragment is being re-constructed 1318 * from a previous saved state as given here. 1319 */ 1320 public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 1321 } 1322 1323 /** 1324 * Get the root view for the fragment's layout (the one returned by {@link #onCreateView}), 1325 * if provided. 1326 * 1327 * @return The fragment's root view, or null if it has no layout. 1328 */ 1329 @Nullable 1330 public View getView() { 1331 return mView; 1332 } 1333 1334 /** 1335 * Called when the fragment's activity has been created and this 1336 * fragment's view hierarchy instantiated. It can be used to do final 1337 * initialization once these pieces are in place, such as retrieving 1338 * views or restoring state. It is also useful for fragments that use 1339 * {@link #setRetainInstance(boolean)} to retain their instance, 1340 * as this callback tells the fragment when it is fully associated with 1341 * the new activity instance. This is called after {@link #onCreateView} 1342 * and before {@link #onViewStateRestored(Bundle)}. 1343 * 1344 * @param savedInstanceState If the fragment is being re-created from 1345 * a previous saved state, this is the state. 1346 */ 1347 @CallSuper 1348 public void onActivityCreated(@Nullable Bundle savedInstanceState) { 1349 mCalled = true; 1350 } 1351 1352 /** 1353 * Called when all saved state has been restored into the view hierarchy 1354 * of the fragment. This can be used to do initialization based on saved 1355 * state that you are letting the view hierarchy track itself, such as 1356 * whether check box widgets are currently checked. This is called 1357 * after {@link #onActivityCreated(Bundle)} and before 1358 * {@link #onStart()}. 1359 * 1360 * @param savedInstanceState If the fragment is being re-created from 1361 * a previous saved state, this is the state. 1362 */ 1363 @CallSuper 1364 public void onViewStateRestored(@Nullable Bundle savedInstanceState) { 1365 mCalled = true; 1366 } 1367 1368 /** 1369 * Called when the Fragment is visible to the user. This is generally 1370 * tied to {@link Activity#onStart() Activity.onStart} of the containing 1371 * Activity's lifecycle. 1372 */ 1373 @CallSuper 1374 public void onStart() { 1375 mCalled = true; 1376 1377 if (!mLoadersStarted) { 1378 mLoadersStarted = true; 1379 if (!mCheckedForLoaderManager) { 1380 mCheckedForLoaderManager = true; 1381 mLoaderManager = mHost.getLoaderManager(mWho, mLoadersStarted, false); 1382 } 1383 if (mLoaderManager != null) { 1384 mLoaderManager.doStart(); 1385 } 1386 } 1387 } 1388 1389 /** 1390 * Called when the fragment is visible to the user and actively running. 1391 * This is generally 1392 * tied to {@link Activity#onResume() Activity.onResume} of the containing 1393 * Activity's lifecycle. 1394 */ 1395 @CallSuper 1396 public void onResume() { 1397 mCalled = true; 1398 } 1399 1400 /** 1401 * Called to ask the fragment to save its current dynamic state, so it 1402 * can later be reconstructed in a new instance of its process is 1403 * restarted. If a new instance of the fragment later needs to be 1404 * created, the data you place in the Bundle here will be available 1405 * in the Bundle given to {@link #onCreate(Bundle)}, 1406 * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}, and 1407 * {@link #onActivityCreated(Bundle)}. 1408 * 1409 * <p>This corresponds to {@link Activity#onSaveInstanceState(Bundle) 1410 * Activity.onSaveInstanceState(Bundle)} and most of the discussion there 1411 * applies here as well. Note however: <em>this method may be called 1412 * at any time before {@link #onDestroy()}</em>. There are many situations 1413 * where a fragment may be mostly torn down (such as when placed on the 1414 * back stack with no UI showing), but its state will not be saved until 1415 * its owning activity actually needs to save its state. 1416 * 1417 * @param outState Bundle in which to place your saved state. 1418 */ 1419 public void onSaveInstanceState(Bundle outState) { 1420 } 1421 1422 /** 1423 * Called when the Fragment's activity changes from fullscreen mode to multi-window mode and 1424 * visa-versa. This is generally tied to {@link Activity#onMultiWindowModeChanged} of the 1425 * containing Activity. 1426 * 1427 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1428 */ 1429 public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { 1430 } 1431 1432 /** 1433 * Called by the system when the activity changes to and from picture-in-picture mode. This is 1434 * generally tied to {@link Activity#onPictureInPictureModeChanged} of the containing Activity. 1435 * 1436 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 1437 */ 1438 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 1439 } 1440 1441 @CallSuper 1442 public void onConfigurationChanged(Configuration newConfig) { 1443 mCalled = true; 1444 } 1445 1446 /** 1447 * Called when the Fragment is no longer resumed. This is generally 1448 * tied to {@link Activity#onPause() Activity.onPause} of the containing 1449 * Activity's lifecycle. 1450 */ 1451 @CallSuper 1452 public void onPause() { 1453 mCalled = true; 1454 } 1455 1456 /** 1457 * Called when the Fragment is no longer started. This is generally 1458 * tied to {@link Activity#onStop() Activity.onStop} of the containing 1459 * Activity's lifecycle. 1460 */ 1461 @CallSuper 1462 public void onStop() { 1463 mCalled = true; 1464 } 1465 1466 @CallSuper 1467 public void onLowMemory() { 1468 mCalled = true; 1469 } 1470 1471 /** 1472 * Called when the view previously created by {@link #onCreateView} has 1473 * been detached from the fragment. The next time the fragment needs 1474 * to be displayed, a new view will be created. This is called 1475 * after {@link #onStop()} and before {@link #onDestroy()}. It is called 1476 * <em>regardless</em> of whether {@link #onCreateView} returned a 1477 * non-null view. Internally it is called after the view's state has 1478 * been saved but before it has been removed from its parent. 1479 */ 1480 @CallSuper 1481 public void onDestroyView() { 1482 mCalled = true; 1483 } 1484 1485 /** 1486 * Called when the fragment is no longer in use. This is called 1487 * after {@link #onStop()} and before {@link #onDetach()}. 1488 */ 1489 @CallSuper 1490 public void onDestroy() { 1491 mCalled = true; 1492 //Log.v("foo", "onDestroy: mCheckedForLoaderManager=" + mCheckedForLoaderManager 1493 // + " mLoaderManager=" + mLoaderManager); 1494 if (!mCheckedForLoaderManager) { 1495 mCheckedForLoaderManager = true; 1496 mLoaderManager = mHost.getLoaderManager(mWho, mLoadersStarted, false); 1497 } 1498 if (mLoaderManager != null) { 1499 mLoaderManager.doDestroy(); 1500 } 1501 } 1502 1503 /** 1504 * Called by the fragment manager once this fragment has been removed, 1505 * so that we don't have any left-over state if the application decides 1506 * to re-use the instance. This only clears state that the framework 1507 * internally manages, not things the application sets. 1508 */ 1509 void initState() { 1510 mIndex = -1; 1511 mWho = null; 1512 mAdded = false; 1513 mRemoving = false; 1514 mFromLayout = false; 1515 mInLayout = false; 1516 mRestored = false; 1517 mBackStackNesting = 0; 1518 mFragmentManager = null; 1519 mChildFragmentManager = null; 1520 mHost = null; 1521 mFragmentId = 0; 1522 mContainerId = 0; 1523 mTag = null; 1524 mHidden = false; 1525 mDetached = false; 1526 mRetaining = false; 1527 mLoaderManager = null; 1528 mLoadersStarted = false; 1529 mCheckedForLoaderManager = false; 1530 } 1531 1532 /** 1533 * Called when the fragment is no longer attached to its activity. This 1534 * is called after {@link #onDestroy()}. 1535 */ 1536 @CallSuper 1537 public void onDetach() { 1538 mCalled = true; 1539 } 1540 1541 /** 1542 * Initialize the contents of the Fragment host's standard options menu. You 1543 * should place your menu items in to <var>menu</var>. For this method 1544 * to be called, you must have first called {@link #setHasOptionsMenu}. See 1545 * {@link Activity#onCreateOptionsMenu(Menu) Activity.onCreateOptionsMenu} 1546 * for more information. 1547 * 1548 * @param menu The options menu in which you place your items. 1549 * 1550 * @see #setHasOptionsMenu 1551 * @see #onPrepareOptionsMenu 1552 * @see #onOptionsItemSelected 1553 */ 1554 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 1555 } 1556 1557 /** 1558 * Prepare the Fragment host's standard options menu to be displayed. This is 1559 * called right before the menu is shown, every time it is shown. You can 1560 * use this method to efficiently enable/disable items or otherwise 1561 * dynamically modify the contents. See 1562 * {@link Activity#onPrepareOptionsMenu(Menu) Activity.onPrepareOptionsMenu} 1563 * for more information. 1564 * 1565 * @param menu The options menu as last shown or first initialized by 1566 * onCreateOptionsMenu(). 1567 * 1568 * @see #setHasOptionsMenu 1569 * @see #onCreateOptionsMenu 1570 */ 1571 public void onPrepareOptionsMenu(Menu menu) { 1572 } 1573 1574 /** 1575 * Called when this fragment's option menu items are no longer being 1576 * included in the overall options menu. Receiving this call means that 1577 * the menu needed to be rebuilt, but this fragment's items were not 1578 * included in the newly built menu (its {@link #onCreateOptionsMenu(Menu, MenuInflater)} 1579 * was not called). 1580 */ 1581 public void onDestroyOptionsMenu() { 1582 } 1583 1584 /** 1585 * This hook is called whenever an item in your options menu is selected. 1586 * The default implementation simply returns false to have the normal 1587 * processing happen (calling the item's Runnable or sending a message to 1588 * its Handler as appropriate). You can use this method for any items 1589 * for which you would like to do processing without those other 1590 * facilities. 1591 * 1592 * <p>Derived classes should call through to the base class for it to 1593 * perform the default menu handling. 1594 * 1595 * @param item The menu item that was selected. 1596 * 1597 * @return boolean Return false to allow normal menu processing to 1598 * proceed, true to consume it here. 1599 * 1600 * @see #onCreateOptionsMenu 1601 */ 1602 public boolean onOptionsItemSelected(MenuItem item) { 1603 return false; 1604 } 1605 1606 /** 1607 * This hook is called whenever the options menu is being closed (either by the user canceling 1608 * the menu with the back/menu button, or when an item is selected). 1609 * 1610 * @param menu The options menu as last shown or first initialized by 1611 * onCreateOptionsMenu(). 1612 */ 1613 public void onOptionsMenuClosed(Menu menu) { 1614 } 1615 1616 /** 1617 * Called when a context menu for the {@code view} is about to be shown. 1618 * Unlike {@link #onCreateOptionsMenu}, this will be called every 1619 * time the context menu is about to be shown and should be populated for 1620 * the view (or item inside the view for {@link AdapterView} subclasses, 1621 * this can be found in the {@code menuInfo})). 1622 * <p> 1623 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 1624 * item has been selected. 1625 * <p> 1626 * The default implementation calls up to 1627 * {@link Activity#onCreateContextMenu Activity.onCreateContextMenu}, though 1628 * you can not call this implementation if you don't want that behavior. 1629 * <p> 1630 * It is not safe to hold onto the context menu after this method returns. 1631 * {@inheritDoc} 1632 */ 1633 @Override 1634 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 1635 getActivity().onCreateContextMenu(menu, v, menuInfo); 1636 } 1637 1638 /** 1639 * Registers a context menu to be shown for the given view (multiple views 1640 * can show the context menu). This method will set the 1641 * {@link OnCreateContextMenuListener} on the view to this fragment, so 1642 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 1643 * called when it is time to show the context menu. 1644 * 1645 * @see #unregisterForContextMenu(View) 1646 * @param view The view that should show a context menu. 1647 */ 1648 public void registerForContextMenu(View view) { 1649 view.setOnCreateContextMenuListener(this); 1650 } 1651 1652 /** 1653 * Prevents a context menu to be shown for the given view. This method will 1654 * remove the {@link OnCreateContextMenuListener} on the view. 1655 * 1656 * @see #registerForContextMenu(View) 1657 * @param view The view that should stop showing a context menu. 1658 */ 1659 public void unregisterForContextMenu(View view) { 1660 view.setOnCreateContextMenuListener(null); 1661 } 1662 1663 /** 1664 * This hook is called whenever an item in a context menu is selected. The 1665 * default implementation simply returns false to have the normal processing 1666 * happen (calling the item's Runnable or sending a message to its Handler 1667 * as appropriate). You can use this method for any items for which you 1668 * would like to do processing without those other facilities. 1669 * <p> 1670 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 1671 * View that added this menu item. 1672 * <p> 1673 * Derived classes should call through to the base class for it to perform 1674 * the default menu handling. 1675 * 1676 * @param item The context menu item that was selected. 1677 * @return boolean Return false to allow normal context menu processing to 1678 * proceed, true to consume it here. 1679 */ 1680 public boolean onContextItemSelected(MenuItem item) { 1681 return false; 1682 } 1683 1684 /** 1685 * When custom transitions are used with Fragments, the enter transition callback 1686 * is called when this Fragment is attached or detached when not popping the back stack. 1687 * 1688 * @param callback Used to manipulate the shared element transitions on this Fragment 1689 * when added not as a pop from the back stack. 1690 */ 1691 public void setEnterSharedElementCallback(SharedElementCallback callback) { 1692 mEnterTransitionCallback = callback; 1693 } 1694 1695 /** 1696 * When custom transitions are used with Fragments, the exit transition callback 1697 * is called when this Fragment is attached or detached when popping the back stack. 1698 * 1699 * @param callback Used to manipulate the shared element transitions on this Fragment 1700 * when added as a pop from the back stack. 1701 */ 1702 public void setExitSharedElementCallback(SharedElementCallback callback) { 1703 mExitTransitionCallback = callback; 1704 } 1705 1706 /** 1707 * Sets the Transition that will be used to move Views into the initial scene. The entering 1708 * Views will be those that are regular Views or ViewGroups that have 1709 * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1710 * {@link android.transition.Visibility} as entering is governed by changing visibility from 1711 * {@link View#INVISIBLE} to {@link View#VISIBLE}. If <code>transition</code> is null, 1712 * entering Views will remain unaffected. 1713 * 1714 * @param transition The Transition to use to move Views into the initial Scene. 1715 */ 1716 public void setEnterTransition(Object transition) { 1717 mEnterTransition = transition; 1718 } 1719 1720 /** 1721 * Returns the Transition that will be used to move Views into the initial scene. The entering 1722 * Views will be those that are regular Views or ViewGroups that have 1723 * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1724 * {@link android.transition.Visibility} as entering is governed by changing visibility from 1725 * {@link View#INVISIBLE} to {@link View#VISIBLE}. 1726 * 1727 * @return the Transition to use to move Views into the initial Scene. 1728 */ 1729 public Object getEnterTransition() { 1730 return mEnterTransition; 1731 } 1732 1733 /** 1734 * Sets the Transition that will be used to move Views out of the scene when the Fragment is 1735 * preparing to be removed, hidden, or detached because of popping the back stack. The exiting 1736 * Views will be those that are regular Views or ViewGroups that have 1737 * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1738 * {@link android.transition.Visibility} as entering is governed by changing visibility from 1739 * {@link View#VISIBLE} to {@link View#INVISIBLE}. If <code>transition</code> is null, 1740 * entering Views will remain unaffected. If nothing is set, the default will be to 1741 * use the same value as set in {@link #setEnterTransition(Object)}. 1742 * 1743 * @param transition The Transition to use to move Views out of the Scene when the Fragment 1744 * is preparing to close. <code>transition</code> must be an 1745 * android.transition.Transition. 1746 */ 1747 public void setReturnTransition(Object transition) { 1748 mReturnTransition = transition; 1749 } 1750 1751 /** 1752 * Returns the Transition that will be used to move Views out of the scene when the Fragment is 1753 * preparing to be removed, hidden, or detached because of popping the back stack. The exiting 1754 * Views will be those that are regular Views or ViewGroups that have 1755 * {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1756 * {@link android.transition.Visibility} as entering is governed by changing visibility from 1757 * {@link View#VISIBLE} to {@link View#INVISIBLE}. If <code>transition</code> is null, 1758 * entering Views will remain unaffected. 1759 * 1760 * @return the Transition to use to move Views out of the Scene when the Fragment 1761 * is preparing to close. 1762 */ 1763 public Object getReturnTransition() { 1764 return mReturnTransition == USE_DEFAULT_TRANSITION ? getEnterTransition() 1765 : mReturnTransition; 1766 } 1767 1768 /** 1769 * Sets the Transition that will be used to move Views out of the scene when the 1770 * fragment is removed, hidden, or detached when not popping the back stack. 1771 * The exiting Views will be those that are regular Views or ViewGroups that 1772 * have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1773 * {@link android.transition.Visibility} as exiting is governed by changing visibility 1774 * from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, the views will 1775 * remain unaffected. 1776 * 1777 * @param transition The Transition to use to move Views out of the Scene when the Fragment 1778 * is being closed not due to popping the back stack. <code>transition</code> 1779 * must be an android.transition.Transition. 1780 */ 1781 public void setExitTransition(Object transition) { 1782 mExitTransition = transition; 1783 } 1784 1785 /** 1786 * Returns the Transition that will be used to move Views out of the scene when the 1787 * fragment is removed, hidden, or detached when not popping the back stack. 1788 * The exiting Views will be those that are regular Views or ViewGroups that 1789 * have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions will extend 1790 * {@link android.transition.Visibility} as exiting is governed by changing visibility 1791 * from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, the views will 1792 * remain unaffected. 1793 * 1794 * @return the Transition to use to move Views out of the Scene when the Fragment 1795 * is being closed not due to popping the back stack. 1796 */ 1797 public Object getExitTransition() { 1798 return mExitTransition; 1799 } 1800 1801 /** 1802 * Sets the Transition that will be used to move Views in to the scene when returning due 1803 * to popping a back stack. The entering Views will be those that are regular Views 1804 * or ViewGroups that have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions 1805 * will extend {@link android.transition.Visibility} as exiting is governed by changing 1806 * visibility from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, 1807 * the views will remain unaffected. If nothing is set, the default will be to use the same 1808 * transition as {@link #setExitTransition(Object)}. 1809 * 1810 * @param transition The Transition to use to move Views into the scene when reentering from a 1811 * previously-started Activity. <code>transition</code> 1812 * must be an android.transition.Transition. 1813 */ 1814 public void setReenterTransition(Object transition) { 1815 mReenterTransition = transition; 1816 } 1817 1818 /** 1819 * Returns the Transition that will be used to move Views in to the scene when returning due 1820 * to popping a back stack. The entering Views will be those that are regular Views 1821 * or ViewGroups that have {@link ViewGroup#isTransitionGroup} return true. Typical Transitions 1822 * will extend {@link android.transition.Visibility} as exiting is governed by changing 1823 * visibility from {@link View#VISIBLE} to {@link View#INVISIBLE}. If transition is null, 1824 * the views will remain unaffected. If nothing is set, the default will be to use the same 1825 * transition as {@link #setExitTransition(Object)}. 1826 * 1827 * @return the Transition to use to move Views into the scene when reentering from a 1828 * previously-started Activity. 1829 */ 1830 public Object getReenterTransition() { 1831 return mReenterTransition == USE_DEFAULT_TRANSITION ? getExitTransition() 1832 : mReenterTransition; 1833 } 1834 1835 /** 1836 * Sets the Transition that will be used for shared elements transferred into the content 1837 * Scene. Typical Transitions will affect size and location, such as 1838 * {@link android.transition.ChangeBounds}. A null 1839 * value will cause transferred shared elements to blink to the final position. 1840 * 1841 * @param transition The Transition to use for shared elements transferred into the content 1842 * Scene. <code>transition</code> must be an android.transition.Transition. 1843 */ 1844 public void setSharedElementEnterTransition(Object transition) { 1845 mSharedElementEnterTransition = transition; 1846 } 1847 1848 /** 1849 * Returns the Transition that will be used for shared elements transferred into the content 1850 * Scene. Typical Transitions will affect size and location, such as 1851 * {@link android.transition.ChangeBounds}. A null 1852 * value will cause transferred shared elements to blink to the final position. 1853 * 1854 * @return The Transition to use for shared elements transferred into the content 1855 * Scene. 1856 */ 1857 public Object getSharedElementEnterTransition() { 1858 return mSharedElementEnterTransition; 1859 } 1860 1861 /** 1862 * Sets the Transition that will be used for shared elements transferred back during a 1863 * pop of the back stack. This Transition acts in the leaving Fragment. 1864 * Typical Transitions will affect size and location, such as 1865 * {@link android.transition.ChangeBounds}. A null 1866 * value will cause transferred shared elements to blink to the final position. 1867 * If no value is set, the default will be to use the same value as 1868 * {@link #setSharedElementEnterTransition(Object)}. 1869 * 1870 * @param transition The Transition to use for shared elements transferred out of the content 1871 * Scene. <code>transition</code> must be an android.transition.Transition. 1872 */ 1873 public void setSharedElementReturnTransition(Object transition) { 1874 mSharedElementReturnTransition = transition; 1875 } 1876 1877 /** 1878 * Return the Transition that will be used for shared elements transferred back during a 1879 * pop of the back stack. This Transition acts in the leaving Fragment. 1880 * Typical Transitions will affect size and location, such as 1881 * {@link android.transition.ChangeBounds}. A null 1882 * value will cause transferred shared elements to blink to the final position. 1883 * If no value is set, the default will be to use the same value as 1884 * {@link #setSharedElementEnterTransition(Object)}. 1885 * 1886 * @return The Transition to use for shared elements transferred out of the content 1887 * Scene. 1888 */ 1889 public Object getSharedElementReturnTransition() { 1890 return mSharedElementReturnTransition == USE_DEFAULT_TRANSITION ? 1891 getSharedElementEnterTransition() : mSharedElementReturnTransition; 1892 } 1893 1894 /** 1895 * Sets whether the the exit transition and enter transition overlap or not. 1896 * When true, the enter transition will start as soon as possible. When false, the 1897 * enter transition will wait until the exit transition completes before starting. 1898 * 1899 * @param allow true to start the enter transition when possible or false to 1900 * wait until the exiting transition completes. 1901 */ 1902 public void setAllowEnterTransitionOverlap(boolean allow) { 1903 mAllowEnterTransitionOverlap = allow; 1904 } 1905 1906 /** 1907 * Returns whether the the exit transition and enter transition overlap or not. 1908 * When true, the enter transition will start as soon as possible. When false, the 1909 * enter transition will wait until the exit transition completes before starting. 1910 * 1911 * @return true when the enter transition should start as soon as possible or false to 1912 * when it should wait until the exiting transition completes. 1913 */ 1914 public boolean getAllowEnterTransitionOverlap() { 1915 return (mAllowEnterTransitionOverlap == null) ? true : mAllowEnterTransitionOverlap; 1916 } 1917 1918 /** 1919 * Sets whether the the return transition and reenter transition overlap or not. 1920 * When true, the reenter transition will start as soon as possible. When false, the 1921 * reenter transition will wait until the return transition completes before starting. 1922 * 1923 * @param allow true to start the reenter transition when possible or false to wait until the 1924 * return transition completes. 1925 */ 1926 public void setAllowReturnTransitionOverlap(boolean allow) { 1927 mAllowReturnTransitionOverlap = allow; 1928 } 1929 1930 /** 1931 * Returns whether the the return transition and reenter transition overlap or not. 1932 * When true, the reenter transition will start as soon as possible. When false, the 1933 * reenter transition will wait until the return transition completes before starting. 1934 * 1935 * @return true to start the reenter transition when possible or false to wait until the 1936 * return transition completes. 1937 */ 1938 public boolean getAllowReturnTransitionOverlap() { 1939 return (mAllowReturnTransitionOverlap == null) ? true : mAllowReturnTransitionOverlap; 1940 } 1941 1942 /** 1943 * Print the Fragments's state into the given stream. 1944 * 1945 * @param prefix Text to print at the front of each line. 1946 * @param fd The raw file descriptor that the dump is being sent to. 1947 * @param writer The PrintWriter to which you should dump your state. This will be 1948 * closed for you after you return. 1949 * @param args additional arguments to the dump request. 1950 */ 1951 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 1952 writer.print(prefix); writer.print("mFragmentId=#"); 1953 writer.print(Integer.toHexString(mFragmentId)); 1954 writer.print(" mContainerId=#"); 1955 writer.print(Integer.toHexString(mContainerId)); 1956 writer.print(" mTag="); writer.println(mTag); 1957 writer.print(prefix); writer.print("mState="); writer.print(mState); 1958 writer.print(" mIndex="); writer.print(mIndex); 1959 writer.print(" mWho="); writer.print(mWho); 1960 writer.print(" mBackStackNesting="); writer.println(mBackStackNesting); 1961 writer.print(prefix); writer.print("mAdded="); writer.print(mAdded); 1962 writer.print(" mRemoving="); writer.print(mRemoving); 1963 writer.print(" mFromLayout="); writer.print(mFromLayout); 1964 writer.print(" mInLayout="); writer.println(mInLayout); 1965 writer.print(prefix); writer.print("mHidden="); writer.print(mHidden); 1966 writer.print(" mDetached="); writer.print(mDetached); 1967 writer.print(" mMenuVisible="); writer.print(mMenuVisible); 1968 writer.print(" mHasMenu="); writer.println(mHasMenu); 1969 writer.print(prefix); writer.print("mRetainInstance="); writer.print(mRetainInstance); 1970 writer.print(" mRetaining="); writer.print(mRetaining); 1971 writer.print(" mUserVisibleHint="); writer.println(mUserVisibleHint); 1972 if (mFragmentManager != null) { 1973 writer.print(prefix); writer.print("mFragmentManager="); 1974 writer.println(mFragmentManager); 1975 } 1976 if (mHost != null) { 1977 writer.print(prefix); writer.print("mHost="); 1978 writer.println(mHost); 1979 } 1980 if (mParentFragment != null) { 1981 writer.print(prefix); writer.print("mParentFragment="); 1982 writer.println(mParentFragment); 1983 } 1984 if (mArguments != null) { 1985 writer.print(prefix); writer.print("mArguments="); writer.println(mArguments); 1986 } 1987 if (mSavedFragmentState != null) { 1988 writer.print(prefix); writer.print("mSavedFragmentState="); 1989 writer.println(mSavedFragmentState); 1990 } 1991 if (mSavedViewState != null) { 1992 writer.print(prefix); writer.print("mSavedViewState="); 1993 writer.println(mSavedViewState); 1994 } 1995 if (mTarget != null) { 1996 writer.print(prefix); writer.print("mTarget="); writer.print(mTarget); 1997 writer.print(" mTargetRequestCode="); 1998 writer.println(mTargetRequestCode); 1999 } 2000 if (mNextAnim != 0) { 2001 writer.print(prefix); writer.print("mNextAnim="); writer.println(mNextAnim); 2002 } 2003 if (mContainer != null) { 2004 writer.print(prefix); writer.print("mContainer="); writer.println(mContainer); 2005 } 2006 if (mView != null) { 2007 writer.print(prefix); writer.print("mView="); writer.println(mView); 2008 } 2009 if (mInnerView != null) { 2010 writer.print(prefix); writer.print("mInnerView="); writer.println(mView); 2011 } 2012 if (mAnimatingAway != null) { 2013 writer.print(prefix); writer.print("mAnimatingAway="); writer.println(mAnimatingAway); 2014 writer.print(prefix); writer.print("mStateAfterAnimating="); 2015 writer.println(mStateAfterAnimating); 2016 } 2017 if (mLoaderManager != null) { 2018 writer.print(prefix); writer.println("Loader Manager:"); 2019 mLoaderManager.dump(prefix + " ", fd, writer, args); 2020 } 2021 if (mChildFragmentManager != null) { 2022 writer.print(prefix); writer.println("Child " + mChildFragmentManager + ":"); 2023 mChildFragmentManager.dump(prefix + " ", fd, writer, args); 2024 } 2025 } 2026 2027 Fragment findFragmentByWho(String who) { 2028 if (who.equals(mWho)) { 2029 return this; 2030 } 2031 if (mChildFragmentManager != null) { 2032 return mChildFragmentManager.findFragmentByWho(who); 2033 } 2034 return null; 2035 } 2036 2037 void instantiateChildFragmentManager() { 2038 mChildFragmentManager = new FragmentManagerImpl(); 2039 mChildFragmentManager.attachController(mHost, new FragmentContainer() { 2040 @Override 2041 @Nullable 2042 public View onFindViewById(int id) { 2043 if (mView == null) { 2044 throw new IllegalStateException("Fragment does not have a view"); 2045 } 2046 return mView.findViewById(id); 2047 } 2048 2049 @Override 2050 public boolean onHasView() { 2051 return (mView != null); 2052 } 2053 }, this); 2054 } 2055 2056 void performCreate(Bundle savedInstanceState) { 2057 if (mChildFragmentManager != null) { 2058 mChildFragmentManager.noteStateNotSaved(); 2059 } 2060 mState = CREATED; 2061 mCalled = false; 2062 onCreate(savedInstanceState); 2063 if (!mCalled) { 2064 throw new SuperNotCalledException("Fragment " + this 2065 + " did not call through to super.onCreate()"); 2066 } 2067 } 2068 2069 View performCreateView(LayoutInflater inflater, ViewGroup container, 2070 Bundle savedInstanceState) { 2071 if (mChildFragmentManager != null) { 2072 mChildFragmentManager.noteStateNotSaved(); 2073 } 2074 return onCreateView(inflater, container, savedInstanceState); 2075 } 2076 2077 void performActivityCreated(Bundle savedInstanceState) { 2078 if (mChildFragmentManager != null) { 2079 mChildFragmentManager.noteStateNotSaved(); 2080 } 2081 mState = ACTIVITY_CREATED; 2082 mCalled = false; 2083 onActivityCreated(savedInstanceState); 2084 if (!mCalled) { 2085 throw new SuperNotCalledException("Fragment " + this 2086 + " did not call through to super.onActivityCreated()"); 2087 } 2088 if (mChildFragmentManager != null) { 2089 mChildFragmentManager.dispatchActivityCreated(); 2090 } 2091 } 2092 2093 void performStart() { 2094 if (mChildFragmentManager != null) { 2095 mChildFragmentManager.noteStateNotSaved(); 2096 mChildFragmentManager.execPendingActions(); 2097 } 2098 mState = STARTED; 2099 mCalled = false; 2100 onStart(); 2101 if (!mCalled) { 2102 throw new SuperNotCalledException("Fragment " + this 2103 + " did not call through to super.onStart()"); 2104 } 2105 if (mChildFragmentManager != null) { 2106 mChildFragmentManager.dispatchStart(); 2107 } 2108 if (mLoaderManager != null) { 2109 mLoaderManager.doReportStart(); 2110 } 2111 } 2112 2113 void performResume() { 2114 if (mChildFragmentManager != null) { 2115 mChildFragmentManager.noteStateNotSaved(); 2116 mChildFragmentManager.execPendingActions(); 2117 } 2118 mState = RESUMED; 2119 mCalled = false; 2120 onResume(); 2121 if (!mCalled) { 2122 throw new SuperNotCalledException("Fragment " + this 2123 + " did not call through to super.onResume()"); 2124 } 2125 if (mChildFragmentManager != null) { 2126 mChildFragmentManager.dispatchResume(); 2127 mChildFragmentManager.execPendingActions(); 2128 } 2129 } 2130 2131 void performMultiWindowModeChanged(boolean isInMultiWindowMode) { 2132 onMultiWindowModeChanged(isInMultiWindowMode); 2133 if (mChildFragmentManager != null) { 2134 mChildFragmentManager.dispatchMultiWindowModeChanged(isInMultiWindowMode); 2135 } 2136 } 2137 2138 void performPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 2139 onPictureInPictureModeChanged(isInPictureInPictureMode); 2140 if (mChildFragmentManager != null) { 2141 mChildFragmentManager.dispatchPictureInPictureModeChanged(isInPictureInPictureMode); 2142 } 2143 } 2144 2145 void performConfigurationChanged(Configuration newConfig) { 2146 onConfigurationChanged(newConfig); 2147 if (mChildFragmentManager != null) { 2148 mChildFragmentManager.dispatchConfigurationChanged(newConfig); 2149 } 2150 } 2151 2152 void performLowMemory() { 2153 onLowMemory(); 2154 if (mChildFragmentManager != null) { 2155 mChildFragmentManager.dispatchLowMemory(); 2156 } 2157 } 2158 2159 /* 2160 void performTrimMemory(int level) { 2161 onTrimMemory(level); 2162 if (mChildFragmentManager != null) { 2163 mChildFragmentManager.dispatchTrimMemory(level); 2164 } 2165 } 2166 */ 2167 2168 boolean performCreateOptionsMenu(Menu menu, MenuInflater inflater) { 2169 boolean show = false; 2170 if (!mHidden) { 2171 if (mHasMenu && mMenuVisible) { 2172 show = true; 2173 onCreateOptionsMenu(menu, inflater); 2174 } 2175 if (mChildFragmentManager != null) { 2176 show |= mChildFragmentManager.dispatchCreateOptionsMenu(menu, inflater); 2177 } 2178 } 2179 return show; 2180 } 2181 2182 boolean performPrepareOptionsMenu(Menu menu) { 2183 boolean show = false; 2184 if (!mHidden) { 2185 if (mHasMenu && mMenuVisible) { 2186 show = true; 2187 onPrepareOptionsMenu(menu); 2188 } 2189 if (mChildFragmentManager != null) { 2190 show |= mChildFragmentManager.dispatchPrepareOptionsMenu(menu); 2191 } 2192 } 2193 return show; 2194 } 2195 2196 boolean performOptionsItemSelected(MenuItem item) { 2197 if (!mHidden) { 2198 if (mHasMenu && mMenuVisible) { 2199 if (onOptionsItemSelected(item)) { 2200 return true; 2201 } 2202 } 2203 if (mChildFragmentManager != null) { 2204 if (mChildFragmentManager.dispatchOptionsItemSelected(item)) { 2205 return true; 2206 } 2207 } 2208 } 2209 return false; 2210 } 2211 2212 boolean performContextItemSelected(MenuItem item) { 2213 if (!mHidden) { 2214 if (onContextItemSelected(item)) { 2215 return true; 2216 } 2217 if (mChildFragmentManager != null) { 2218 if (mChildFragmentManager.dispatchContextItemSelected(item)) { 2219 return true; 2220 } 2221 } 2222 } 2223 return false; 2224 } 2225 2226 void performOptionsMenuClosed(Menu menu) { 2227 if (!mHidden) { 2228 if (mHasMenu && mMenuVisible) { 2229 onOptionsMenuClosed(menu); 2230 } 2231 if (mChildFragmentManager != null) { 2232 mChildFragmentManager.dispatchOptionsMenuClosed(menu); 2233 } 2234 } 2235 } 2236 2237 void performSaveInstanceState(Bundle outState) { 2238 onSaveInstanceState(outState); 2239 if (mChildFragmentManager != null) { 2240 Parcelable p = mChildFragmentManager.saveAllState(); 2241 if (p != null) { 2242 outState.putParcelable(FragmentActivity.FRAGMENTS_TAG, p); 2243 } 2244 } 2245 } 2246 2247 void performPause() { 2248 if (mChildFragmentManager != null) { 2249 mChildFragmentManager.dispatchPause(); 2250 } 2251 mState = STARTED; 2252 mCalled = false; 2253 onPause(); 2254 if (!mCalled) { 2255 throw new SuperNotCalledException("Fragment " + this 2256 + " did not call through to super.onPause()"); 2257 } 2258 } 2259 2260 void performStop() { 2261 if (mChildFragmentManager != null) { 2262 mChildFragmentManager.dispatchStop(); 2263 } 2264 mState = STOPPED; 2265 mCalled = false; 2266 onStop(); 2267 if (!mCalled) { 2268 throw new SuperNotCalledException("Fragment " + this 2269 + " did not call through to super.onStop()"); 2270 } 2271 } 2272 2273 void performReallyStop() { 2274 if (mChildFragmentManager != null) { 2275 mChildFragmentManager.dispatchReallyStop(); 2276 } 2277 mState = ACTIVITY_CREATED; 2278 if (mLoadersStarted) { 2279 mLoadersStarted = false; 2280 if (!mCheckedForLoaderManager) { 2281 mCheckedForLoaderManager = true; 2282 mLoaderManager = mHost.getLoaderManager(mWho, mLoadersStarted, false); 2283 } 2284 if (mLoaderManager != null) { 2285 if (mHost.getRetainLoaders()) { 2286 mLoaderManager.doRetain(); 2287 } else { 2288 mLoaderManager.doStop(); 2289 } 2290 } 2291 } 2292 } 2293 2294 void performDestroyView() { 2295 if (mChildFragmentManager != null) { 2296 mChildFragmentManager.dispatchDestroyView(); 2297 } 2298 mState = CREATED; 2299 mCalled = false; 2300 onDestroyView(); 2301 if (!mCalled) { 2302 throw new SuperNotCalledException("Fragment " + this 2303 + " did not call through to super.onDestroyView()"); 2304 } 2305 if (mLoaderManager != null) { 2306 mLoaderManager.doReportNextStart(); 2307 } 2308 } 2309 2310 void performDestroy() { 2311 if (mChildFragmentManager != null) { 2312 mChildFragmentManager.dispatchDestroy(); 2313 } 2314 mState = INITIALIZING; 2315 mCalled = false; 2316 onDestroy(); 2317 if (!mCalled) { 2318 throw new SuperNotCalledException("Fragment " + this 2319 + " did not call through to super.onDestroy()"); 2320 } 2321 mChildFragmentManager = null; 2322 } 2323 2324 void performDetach() { 2325 mCalled = false; 2326 onDetach(); 2327 if (!mCalled) { 2328 throw new SuperNotCalledException("Fragment " + this 2329 + " did not call through to super.onDetach()"); 2330 } 2331 2332 // Destroy the child FragmentManager if we still have it here. 2333 // We won't unless we're retaining our instance and if we do, 2334 // our child FragmentManager instance state will have already been saved. 2335 if (mChildFragmentManager != null) { 2336 if (!mRetaining) { 2337 throw new IllegalStateException("Child FragmentManager of " + this + " was not " 2338 + " destroyed and this fragment is not retaining instance"); 2339 } 2340 mChildFragmentManager.dispatchDestroy(); 2341 mChildFragmentManager = null; 2342 } 2343 } 2344 2345} 2346