Fragment.java revision b1ad5977bc8178b6d350ebe9099daded4c1ef603
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.content.ComponentCallbacks; 20import android.content.Context; 21import android.content.Intent; 22import android.content.res.Configuration; 23import android.os.Bundle; 24import android.os.Parcel; 25import android.os.Parcelable; 26import android.util.AttributeSet; 27import android.util.SparseArray; 28import android.view.ContextMenu; 29import android.view.LayoutInflater; 30import android.view.Menu; 31import android.view.MenuInflater; 32import android.view.MenuItem; 33import android.view.View; 34import android.view.ViewGroup; 35import android.view.ContextMenu.ContextMenuInfo; 36import android.view.View.OnCreateContextMenuListener; 37import android.view.animation.Animation; 38import android.widget.AdapterView; 39 40import java.lang.reflect.InvocationTargetException; 41import java.util.HashMap; 42 43final class FragmentState implements Parcelable { 44 static final String VIEW_STATE_TAG = "android:view_state"; 45 46 final String mClassName; 47 final int mIndex; 48 final boolean mFromLayout; 49 final int mFragmentId; 50 final int mContainerId; 51 final String mTag; 52 final boolean mRetainInstance; 53 54 Bundle mSavedFragmentState; 55 56 Fragment mInstance; 57 58 public FragmentState(Fragment frag) { 59 mClassName = frag.getClass().getName(); 60 mIndex = frag.mIndex; 61 mFromLayout = frag.mFromLayout; 62 mFragmentId = frag.mFragmentId; 63 mContainerId = frag.mContainerId; 64 mTag = frag.mTag; 65 mRetainInstance = frag.mRetainInstance; 66 } 67 68 public FragmentState(Parcel in) { 69 mClassName = in.readString(); 70 mIndex = in.readInt(); 71 mFromLayout = in.readInt() != 0; 72 mFragmentId = in.readInt(); 73 mContainerId = in.readInt(); 74 mTag = in.readString(); 75 mRetainInstance = in.readInt() != 0; 76 mSavedFragmentState = in.readBundle(); 77 } 78 79 public Fragment instantiate(Activity activity) { 80 if (mInstance != null) { 81 return mInstance; 82 } 83 84 try { 85 mInstance = Fragment.instantiate(activity, mClassName); 86 } catch (Exception e) { 87 throw new RuntimeException("Unable to restore fragment " + mClassName, e); 88 } 89 90 if (mSavedFragmentState != null) { 91 mSavedFragmentState.setClassLoader(activity.getClassLoader()); 92 mInstance.mSavedFragmentState = mSavedFragmentState; 93 mInstance.mSavedViewState 94 = mSavedFragmentState.getSparseParcelableArray(VIEW_STATE_TAG); 95 } 96 mInstance.setIndex(mIndex); 97 mInstance.mFromLayout = mFromLayout; 98 mInstance.mFragmentId = mFragmentId; 99 mInstance.mContainerId = mContainerId; 100 mInstance.mTag = mTag; 101 mInstance.mRetainInstance = mRetainInstance; 102 103 return mInstance; 104 } 105 106 public int describeContents() { 107 return 0; 108 } 109 110 public void writeToParcel(Parcel dest, int flags) { 111 dest.writeString(mClassName); 112 dest.writeInt(mIndex); 113 dest.writeInt(mFromLayout ? 1 : 0); 114 dest.writeInt(mFragmentId); 115 dest.writeInt(mContainerId); 116 dest.writeString(mTag); 117 dest.writeInt(mRetainInstance ? 1 : 0); 118 dest.writeBundle(mSavedFragmentState); 119 } 120 121 public static final Parcelable.Creator<FragmentState> CREATOR 122 = new Parcelable.Creator<FragmentState>() { 123 public FragmentState createFromParcel(Parcel in) { 124 return new FragmentState(in); 125 } 126 127 public FragmentState[] newArray(int size) { 128 return new FragmentState[size]; 129 } 130 }; 131} 132 133/** 134 * A Fragment is a piece of an application's user interface or behavior 135 * that can be placed in an {@link Activity}. 136 */ 137public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener { 138 private static final HashMap<String, Class<?>> sClassMap = 139 new HashMap<String, Class<?>>(); 140 141 static final int INITIALIZING = 0; // Not yet created. 142 static final int CREATED = 1; // Created. 143 static final int ACTIVITY_CREATED = 2; // The activity has finished its creation. 144 static final int STARTED = 3; // Created and started, not resumed. 145 static final int RESUMED = 4; // Created started and resumed. 146 147 int mState = INITIALIZING; 148 149 // When instantiated from saved state, this is the saved state. 150 Bundle mSavedFragmentState; 151 SparseArray<Parcelable> mSavedViewState; 152 153 // Index into active fragment array. 154 int mIndex = -1; 155 156 // Internal unique name for this fragment; 157 String mWho; 158 159 // True if the fragment is in the list of added fragments. 160 boolean mAdded; 161 162 // True if the fragment is in the resumed state. 163 boolean mResumed; 164 165 // Set to true if this fragment was instantiated from a layout file. 166 boolean mFromLayout; 167 168 // Number of active back stack entries this fragment is in. 169 int mBackStackNesting; 170 171 // Set as soon as a fragment is added to a transaction (or removed), 172 // to be able to do validation. 173 Activity mImmediateActivity; 174 175 // Activity this fragment is attached to. 176 Activity mActivity; 177 178 // The optional identifier for this fragment -- either the container ID if it 179 // was dynamically added to the view hierarchy, or the ID supplied in 180 // layout. 181 int mFragmentId; 182 183 // When a fragment is being dynamically added to the view hierarchy, this 184 // is the identifier of the parent container it is being added to. 185 int mContainerId; 186 187 // The optional named tag for this fragment -- usually used to find 188 // fragments that are not part of the layout. 189 String mTag; 190 191 // Set to true when the app has requested that this fragment be hidden 192 // from the user. 193 boolean mHidden; 194 195 // If set this fragment would like its instance retained across 196 // configuration changes. 197 boolean mRetainInstance; 198 199 // If set this fragment is being retained across the current config change. 200 boolean mRetaining; 201 202 // If set this fragment has menu items to contribute. 203 boolean mHasMenu; 204 205 // Used to verify that subclasses call through to super class. 206 boolean mCalled; 207 208 // If app has requested a specific animation, this is the one to use. 209 int mNextAnim; 210 211 // The parent container of the fragment after dynamically added to UI. 212 ViewGroup mContainer; 213 214 // The View generated for this fragment. 215 View mView; 216 217 LoaderManagerImpl mLoaderManager; 218 boolean mStarted; 219 220 /** 221 * Default constructor. <strong>Every</string> fragment must have an 222 * empty constructor, so it can be instantiated when restoring its 223 * activity's state. It is strongly recommended that subclasses do not 224 * have other constructors with parameters, since these constructors 225 * will not be called when the fragment is re-instantiated; instead, 226 * retrieve such parameters from the activity in {@link #onAttach(Activity)}. 227 */ 228 public Fragment() { 229 } 230 231 /** 232 * Create a new instance of a Fragment with the given class name. This is 233 * the same as calling its empty constructor. 234 * 235 * @param context The calling context being used to instantiate the fragment. 236 * This is currently just used to get its ClassLoader. 237 * @param fname The class name of the fragment to instantiate. 238 * @return Returns a new fragment instance. 239 * @throws NoSuchMethodException The fragment does not have an empty constructor. 240 * @throws ClassNotFoundException The fragment class does not exist. 241 * @throws IllegalArgumentException Bad arguments supplied to fragment class 242 * constructor (should not happen). 243 * @throws InstantiationException Caller does not have permission to instantiate 244 * the fragment (for example its constructor is not public). 245 * @throws IllegalAccessException Caller does not have permission to access 246 * the given fragment class. 247 * @throws InvocationTargetException Failure running the fragment's constructor. 248 */ 249 public static Fragment instantiate(Context context, String fname) 250 throws NoSuchMethodException, ClassNotFoundException, 251 IllegalArgumentException, InstantiationException, 252 IllegalAccessException, InvocationTargetException { 253 Class<?> clazz = sClassMap.get(fname); 254 255 if (clazz == null) { 256 // Class not found in the cache, see if it's real, and try to add it 257 clazz = context.getClassLoader().loadClass(fname); 258 sClassMap.put(fname, clazz); 259 } 260 return (Fragment)clazz.newInstance(); 261 } 262 263 void restoreViewState() { 264 if (mSavedViewState != null) { 265 mView.restoreHierarchyState(mSavedViewState); 266 mSavedViewState = null; 267 } 268 } 269 270 void setIndex(int index) { 271 mIndex = index; 272 mWho = "android:fragment:" + mIndex; 273 } 274 275 void clearIndex() { 276 mIndex = -1; 277 mWho = null; 278 } 279 280 /** 281 * Subclasses can not override equals(). 282 */ 283 @Override final public boolean equals(Object o) { 284 return super.equals(o); 285 } 286 287 /** 288 * Subclasses can not override hashCode(). 289 */ 290 @Override final public int hashCode() { 291 return super.hashCode(); 292 } 293 294 @Override 295 public String toString() { 296 StringBuilder sb = new StringBuilder(128); 297 sb.append("Fragment{"); 298 sb.append(Integer.toHexString(System.identityHashCode(this))); 299 if (mIndex >= 0) { 300 sb.append(" #"); 301 sb.append(mIndex); 302 } 303 if (mFragmentId != 0) { 304 sb.append(" id=0x"); 305 sb.append(Integer.toHexString(mFragmentId)); 306 } 307 if (mTag != null) { 308 sb.append(" "); 309 sb.append(mTag); 310 } 311 sb.append('}'); 312 return sb.toString(); 313 } 314 315 /** 316 * Return the identifier this fragment is known by. This is either 317 * the android:id value supplied in a layout or the container view ID 318 * supplied when adding the fragment. 319 */ 320 final public int getId() { 321 return mFragmentId; 322 } 323 324 /** 325 * Get the tag name of the fragment, if specified. 326 */ 327 final public String getTag() { 328 return mTag; 329 } 330 331 /** 332 * Return the Activity this fragment is currently associated with. 333 */ 334 final public Activity getActivity() { 335 return mActivity; 336 } 337 338 /** 339 * Return true if the fragment is currently added to its activity. 340 */ 341 final public boolean isAdded() { 342 return mActivity != null && mActivity.mFragments.mAdded.contains(this); 343 } 344 345 /** 346 * Return true if the fragment is in the resumed state. This is true 347 * for the duration of {@link #onResume()} and {@link #onPause()} as well. 348 */ 349 final public boolean isResumed() { 350 return mResumed; 351 } 352 353 /** 354 * Return true if the fragment is currently visible to the user. This means 355 * it: (1) has been added, (2) has its view attached to the window, and 356 * (3) is not hidden. 357 */ 358 final public boolean isVisible() { 359 return isAdded() && !isHidden() && mView != null 360 && mView.getWindowToken() != null && mView.getVisibility() == View.VISIBLE; 361 } 362 363 /** 364 * Return true if the fragment has been hidden. By default fragments 365 * are shown. You can find out about changes to this state with 366 * {@link #onHiddenChanged}. Note that the hidden state is orthogonal 367 * to other states -- that is, to be visible to the user, a fragment 368 * must be both started and not hidden. 369 */ 370 final public boolean isHidden() { 371 return mHidden; 372 } 373 374 /** 375 * Called when the hidden state (as returned by {@link #isHidden()} of 376 * the fragment has changed. Fragments start out not hidden; this will 377 * be called whenever the fragment changes state from that. 378 * @param hidden True if the fragment is now hidden, false if it is not 379 * visible. 380 */ 381 public void onHiddenChanged(boolean hidden) { 382 } 383 384 /** 385 * Control whether a fragment instance is retained across Activity 386 * re-creation (such as from a configuration change). This can only 387 * be used with fragments not in the back stack. If set, the fragment 388 * lifecycle will be slightly different when an activity is recreated: 389 * <ul> 390 * <li> {@link #onDestroy()} will not be called (but {@link #onDetach()} still 391 * will be, because the fragment is being detached from its current activity). 392 * <li> {@link #onCreate(Bundle)} will not be called since the fragment 393 * is not being re-created. 394 * <li> {@link #onAttach(Activity)} and {@link #onActivityCreated(Bundle)} <b>will</b> 395 * still be called. 396 * </ul> 397 */ 398 public void setRetainInstance(boolean retain) { 399 mRetainInstance = retain; 400 } 401 402 final public boolean getRetainInstance() { 403 return mRetainInstance; 404 } 405 406 /** 407 * Report that this fragment would like to participate in populating 408 * the options menu by receiving a call to {@link #onCreateOptionsMenu} 409 * and related methods. 410 * 411 * @param hasMenu If true, the fragment has menu items to contribute. 412 */ 413 public void setHasOptionsMenu(boolean hasMenu) { 414 if (mHasMenu != hasMenu) { 415 mHasMenu = hasMenu; 416 if (isAdded() && !isHidden()) { 417 mActivity.invalidateOptionsMenu(); 418 } 419 } 420 } 421 422 /** 423 * Return the LoaderManager for this fragment, creating it if needed. 424 */ 425 public LoaderManager getLoaderManager() { 426 if (mLoaderManager != null) { 427 return mLoaderManager; 428 } 429 mLoaderManager = mActivity.getLoaderManager(mIndex, mStarted); 430 return mLoaderManager; 431 } 432 433 /** 434 * Call {@link Activity#startActivity(Intent)} on the fragment's 435 * containing Activity. 436 */ 437 public void startActivity(Intent intent) { 438 mActivity.startActivityFromFragment(this, intent, -1); 439 } 440 441 /** 442 * Call {@link Activity#startActivityForResult(Intent, int)} on the fragment's 443 * containing Activity. 444 */ 445 public void startActivityForResult(Intent intent, int requestCode) { 446 mActivity.startActivityFromFragment(this, intent, requestCode); 447 } 448 449 /** 450 * Receive the result from a previous call to 451 * {@link #startActivityForResult(Intent, int)}. This follows the 452 * related Activity API as described there in 453 * {@link Activity#onActivityResult(int, int, Intent)}. 454 * 455 * @param requestCode The integer request code originally supplied to 456 * startActivityForResult(), allowing you to identify who this 457 * result came from. 458 * @param resultCode The integer result code returned by the child activity 459 * through its setResult(). 460 * @param data An Intent, which can return result data to the caller 461 * (various data can be attached to Intent "extras"). 462 */ 463 public void onActivityResult(int requestCode, int resultCode, Intent data) { 464 } 465 466 /** 467 * Called when a fragment is being created as part of a view layout 468 * inflation, typically from setting the content view of an activity. This 469 * will be called both the first time the fragment is created, as well 470 * later when it is being re-created from its saved state (which is also 471 * given here). 472 * 473 * XXX This is kind-of yucky... maybe we could just supply the 474 * AttributeSet to onCreate()? 475 * 476 * @param activity The Activity that is inflating the fragment. 477 * @param attrs The attributes at the tag where the fragment is 478 * being created. 479 * @param savedInstanceState If the fragment is being re-created from 480 * a previous saved state, this is the state. 481 */ 482 public void onInflate(Activity activity, AttributeSet attrs, 483 Bundle savedInstanceState) { 484 mCalled = true; 485 } 486 487 /** 488 * Called when a fragment is first attached to its activity. 489 * {@link #onCreate(Bundle)} will be called after this. 490 */ 491 public void onAttach(Activity activity) { 492 mCalled = true; 493 } 494 495 public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) { 496 return null; 497 } 498 499 /** 500 * Called to do initial creation of a fragment. This is called after 501 * {@link #onAttach(Activity)} and before 502 * {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}. 503 * 504 * <p>Note that this can be called while the fragment's activity is 505 * still in the process of being created. As such, you can not rely 506 * on things like the activity's content view hierarchy being initialized 507 * at this point. If you want to do work once the activity itself is 508 * created, see {@link #onActivityCreated(Bundle)}. 509 * 510 * @param savedInstanceState If the fragment is being re-created from 511 * a previous saved state, this is the state. 512 */ 513 public void onCreate(Bundle savedInstanceState) { 514 mCalled = true; 515 } 516 517 /** 518 * Called to have the fragment instantiate its user interface view. 519 * This is optional, and non-graphical fragments can return null (which 520 * is the default implementation). This will be called between 521 * {@link #onCreate(Bundle)} and {@link #onActivityCreated(Bundle)}. 522 * 523 * <p>If you return a View from here, you will later be called in 524 * {@link #onDestroyView} when the view is being released. 525 * 526 * @param inflater The LayoutInflater object that can be used to inflate 527 * any views in the fragment, 528 * @param container If non-null, this is the parent view that the fragment's 529 * UI should be attached to. The fragment should not add the view itself, 530 * but this can be used to generate the LayoutParams of the view. 531 * @param savedInstanceState If non-null, this fragment is being re-constructed 532 * from a previous saved state as given here. 533 * 534 * @return Return the View for the fragment's UI, or null. 535 */ 536 public View onCreateView(LayoutInflater inflater, ViewGroup container, 537 Bundle savedInstanceState) { 538 return null; 539 } 540 541 public View getView() { 542 return mView; 543 } 544 545 /** 546 * Called when the fragment's activity has been created and this 547 * fragment's view hierarchy instantiated. It can be used to do final 548 * initialization once these pieces are in place, such as retrieving 549 * views or restoring state. It is also useful for fragments that use 550 * {@link #setRetainInstance(boolean)} to retain their instance, 551 * as this callback tells the fragment when it is fully associated with 552 * the new activity instance. This is called after {@link #onCreateView} 553 * and before {@link #onStart()}. 554 * 555 * @param savedInstanceState If the fragment is being re-created from 556 * a previous saved state, this is the state. 557 */ 558 public void onActivityCreated(Bundle savedInstanceState) { 559 mCalled = true; 560 } 561 562 /** 563 * Called when the Fragment is visible to the user. This is generally 564 * tied to {@link Activity#onStart() Activity.onStart} of the containing 565 * Activity's lifecycle. 566 */ 567 public void onStart() { 568 mCalled = true; 569 mStarted = true; 570 if (mLoaderManager != null) { 571 mLoaderManager.doStart(); 572 } 573 } 574 575 /** 576 * Called when the fragment is visible to the user and actively running. 577 * This is generally 578 * tied to {@link Activity#onResume() Activity.onResume} of the containing 579 * Activity's lifecycle. 580 */ 581 public void onResume() { 582 mCalled = true; 583 } 584 585 public void onSaveInstanceState(Bundle outState) { 586 } 587 588 public void onConfigurationChanged(Configuration newConfig) { 589 mCalled = true; 590 } 591 592 /** 593 * Called when the Fragment is no longer resumed. This is generally 594 * tied to {@link Activity#onPause() Activity.onPause} of the containing 595 * Activity's lifecycle. 596 */ 597 public void onPause() { 598 mCalled = true; 599 } 600 601 /** 602 * Called when the Fragment is no longer started. This is generally 603 * tied to {@link Activity#onStop() Activity.onStop} of the containing 604 * Activity's lifecycle. 605 */ 606 public void onStop() { 607 mCalled = true; 608 } 609 610 public void onLowMemory() { 611 mCalled = true; 612 } 613 614 /** 615 * Called when the view previously created by {@link #onCreateView} has 616 * been detached from the fragment. The next time the fragment needs 617 * to be displayed, a new view will be created. This is called 618 * after {@link #onStop()} and before {@link #onDestroy()}; it is only 619 * called if {@link #onCreateView} returns a non-null View. 620 */ 621 public void onDestroyView() { 622 mCalled = true; 623 } 624 625 /** 626 * Called when the fragment is no longer in use. This is called 627 * after {@link #onStop()} and before {@link #onDetach()}. 628 */ 629 public void onDestroy() { 630 mCalled = true; 631 if (mLoaderManager != null) { 632 mLoaderManager.doDestroy(); 633 } 634 } 635 636 /** 637 * Called when the fragment is no longer attached to its activity. This 638 * is called after {@link #onDestroy()}. 639 */ 640 public void onDetach() { 641 mCalled = true; 642 } 643 644 /** 645 * Initialize the contents of the Activity's standard options menu. You 646 * should place your menu items in to <var>menu</var>. For this method 647 * to be called, you must have first called {@link #setHasOptionsMenu}. See 648 * {@link Activity#onCreateOptionsMenu(Menu) Activity.onCreateOptionsMenu} 649 * for more information. 650 * 651 * @param menu The options menu in which you place your items. 652 * 653 * @see #setHasOptionsMenu 654 * @see #onPrepareOptionsMenu 655 * @see #onOptionsItemSelected 656 */ 657 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 658 } 659 660 /** 661 * Prepare the Screen's standard options menu to be displayed. This is 662 * called right before the menu is shown, every time it is shown. You can 663 * use this method to efficiently enable/disable items or otherwise 664 * dynamically modify the contents. See 665 * {@link Activity#onPrepareOptionsMenu(Menu) Activity.onPrepareOptionsMenu} 666 * for more information. 667 * 668 * @param menu The options menu as last shown or first initialized by 669 * onCreateOptionsMenu(). 670 * 671 * @see #setHasOptionsMenu 672 * @see #onCreateOptionsMenu 673 */ 674 public void onPrepareOptionsMenu(Menu menu) { 675 } 676 677 /** 678 * This hook is called whenever an item in your options menu is selected. 679 * The default implementation simply returns false to have the normal 680 * processing happen (calling the item's Runnable or sending a message to 681 * its Handler as appropriate). You can use this method for any items 682 * for which you would like to do processing without those other 683 * facilities. 684 * 685 * <p>Derived classes should call through to the base class for it to 686 * perform the default menu handling. 687 * 688 * @param item The menu item that was selected. 689 * 690 * @return boolean Return false to allow normal menu processing to 691 * proceed, true to consume it here. 692 * 693 * @see #onCreateOptionsMenu 694 */ 695 public boolean onOptionsItemSelected(MenuItem item) { 696 return false; 697 } 698 699 /** 700 * This hook is called whenever the options menu is being closed (either by the user canceling 701 * the menu with the back/menu button, or when an item is selected). 702 * 703 * @param menu The options menu as last shown or first initialized by 704 * onCreateOptionsMenu(). 705 */ 706 public void onOptionsMenuClosed(Menu menu) { 707 } 708 709 /** 710 * Called when a context menu for the {@code view} is about to be shown. 711 * Unlike {@link #onCreateOptionsMenu}, this will be called every 712 * time the context menu is about to be shown and should be populated for 713 * the view (or item inside the view for {@link AdapterView} subclasses, 714 * this can be found in the {@code menuInfo})). 715 * <p> 716 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 717 * item has been selected. 718 * <p> 719 * The default implementation calls up to 720 * {@link Activity#onCreateContextMenu Activity.onCreateContextMenu}, though 721 * you can not call this implementation if you don't want that behavior. 722 * <p> 723 * It is not safe to hold onto the context menu after this method returns. 724 * {@inheritDoc} 725 */ 726 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 727 getActivity().onCreateContextMenu(menu, v, menuInfo); 728 } 729 730 /** 731 * Registers a context menu to be shown for the given view (multiple views 732 * can show the context menu). This method will set the 733 * {@link OnCreateContextMenuListener} on the view to this fragment, so 734 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 735 * called when it is time to show the context menu. 736 * 737 * @see #unregisterForContextMenu(View) 738 * @param view The view that should show a context menu. 739 */ 740 public void registerForContextMenu(View view) { 741 view.setOnCreateContextMenuListener(this); 742 } 743 744 /** 745 * Prevents a context menu to be shown for the given view. This method will 746 * remove the {@link OnCreateContextMenuListener} on the view. 747 * 748 * @see #registerForContextMenu(View) 749 * @param view The view that should stop showing a context menu. 750 */ 751 public void unregisterForContextMenu(View view) { 752 view.setOnCreateContextMenuListener(null); 753 } 754 755 /** 756 * This hook is called whenever an item in a context menu is selected. The 757 * default implementation simply returns false to have the normal processing 758 * happen (calling the item's Runnable or sending a message to its Handler 759 * as appropriate). You can use this method for any items for which you 760 * would like to do processing without those other facilities. 761 * <p> 762 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 763 * View that added this menu item. 764 * <p> 765 * Derived classes should call through to the base class for it to perform 766 * the default menu handling. 767 * 768 * @param item The context menu item that was selected. 769 * @return boolean Return false to allow normal context menu processing to 770 * proceed, true to consume it here. 771 */ 772 public boolean onContextItemSelected(MenuItem item) { 773 return false; 774 } 775 776 void performStop() { 777 onStop(); 778 if (mStarted) { 779 mStarted = false; 780 if (mLoaderManager != null) { 781 if (mActivity == null || !mActivity.mChangingConfigurations) { 782 mLoaderManager.doStop(); 783 } else { 784 mLoaderManager.doRetain(); 785 } 786 } 787 } 788 } 789} 790