FragmentActivity.java revision 20680c49584c26f7818c2dec8fb00633af753e4a
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.Context; 21import android.content.Intent; 22import android.content.res.Configuration; 23import android.content.res.Resources; 24import android.os.Bundle; 25import android.os.Handler; 26import android.os.Message; 27import android.os.Parcelable; 28import android.support.annotation.NonNull; 29import android.support.annotation.Nullable; 30import android.support.v4.util.SimpleArrayMap; 31import android.util.AttributeSet; 32import android.util.Log; 33import android.view.KeyEvent; 34import android.view.Menu; 35import android.view.MenuItem; 36import android.view.View; 37import android.view.ViewGroup; 38import android.view.Window; 39 40import java.io.FileDescriptor; 41import java.io.PrintWriter; 42import java.util.ArrayList; 43 44/** 45 * Base class for activities that want to use the support-based 46 * {@link android.support.v4.app.Fragment} and 47 * {@link android.support.v4.content.Loader} APIs. 48 * 49 * <p>When using this class as opposed to new platform's built-in fragment 50 * and loader support, you must use the {@link #getSupportFragmentManager()} 51 * and {@link #getSupportLoaderManager()} methods respectively to access 52 * those features. 53 * 54 * <p class="note"><strong>Note:</strong> If you want to implement an activity that includes 55 * an <a href="{@docRoot}guide/topics/ui/actionbar.html">action bar</a>, you should instead use 56 * the {@link android.support.v7.app.ActionBarActivity} class, which is a subclass of this one, 57 * so allows you to use {@link android.support.v4.app.Fragment} APIs on API level 7 and higher.</p> 58 * 59 * <p>Known limitations:</p> 60 * <ul> 61 * <li> <p>When using the <code><fragment></code> tag, this implementation can not 62 * use the parent view's ID as the new fragment's ID. You must explicitly 63 * specify an ID (or tag) in the <code><fragment></code>.</p> 64 * <li> <p>Prior to Honeycomb (3.0), an activity's state was saved before pausing. 65 * Fragments are a significant amount of new state, and dynamic enough that one 66 * often wants them to change between pausing and stopping. These classes 67 * throw an exception if you try to change the fragment state after it has been 68 * saved, to avoid accidental loss of UI state. However this is too restrictive 69 * prior to Honeycomb, where the state is saved before pausing. To address this, 70 * when running on platforms prior to Honeycomb an exception will not be thrown 71 * if you change fragments between the state save and the activity being stopped. 72 * This means that in some cases if the activity is restored from its last saved 73 * state, this may be a snapshot slightly before what the user last saw.</p> 74 * </ul> 75 */ 76public class FragmentActivity extends BaseFragmentActivityHoneycomb { 77 private static final String TAG = "FragmentActivity"; 78 79 static final String FRAGMENTS_TAG = "android:support:fragments"; 80 81 // This is the SDK API version of Honeycomb (3.0). 82 private static final int HONEYCOMB = 11; 83 84 static final int MSG_REALLY_STOPPED = 1; 85 static final int MSG_RESUME_PENDING = 2; 86 87 final Handler mHandler = new Handler() { 88 @Override 89 public void handleMessage(Message msg) { 90 switch (msg.what) { 91 case MSG_REALLY_STOPPED: 92 if (mStopped) { 93 doReallyStop(false); 94 } 95 break; 96 case MSG_RESUME_PENDING: 97 onResumeFragments(); 98 mFragments.execPendingActions(); 99 break; 100 default: 101 super.handleMessage(msg); 102 } 103 } 104 105 }; 106 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 107 final FragmentContainer mContainer = new FragmentContainer() { 108 @Override 109 @Nullable 110 public View findViewById(int id) { 111 return FragmentActivity.this.findViewById(id); 112 } 113 114 @Override 115 public boolean hasView() { 116 Window window = FragmentActivity.this.getWindow(); 117 return (window != null && window.peekDecorView() != null); 118 } 119 }; 120 121 boolean mCreated; 122 boolean mResumed; 123 boolean mStopped; 124 boolean mReallyStopped; 125 boolean mRetaining; 126 127 boolean mOptionsMenuInvalidated; 128 129 boolean mCheckedForLoaderManager; 130 boolean mLoadersStarted; 131 SimpleArrayMap<String, LoaderManagerImpl> mAllLoaderManagers; 132 LoaderManagerImpl mLoaderManager; 133 134 static final class NonConfigurationInstances { 135 Object activity; 136 Object custom; 137 SimpleArrayMap<String, Object> children; 138 ArrayList<Fragment> fragments; 139 SimpleArrayMap<String, LoaderManagerImpl> loaders; 140 } 141 142 // ------------------------------------------------------------------------ 143 // HOOKS INTO ACTIVITY 144 // ------------------------------------------------------------------------ 145 146 /** 147 * Dispatch incoming result to the correct fragment. 148 */ 149 @Override 150 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 151 mFragments.noteStateNotSaved(); 152 int index = requestCode>>16; 153 if (index != 0) { 154 index--; 155 if (mFragments.mActive == null || index < 0 || index >= mFragments.mActive.size()) { 156 Log.w(TAG, "Activity result fragment index out of range: 0x" 157 + Integer.toHexString(requestCode)); 158 return; 159 } 160 Fragment frag = mFragments.mActive.get(index); 161 if (frag == null) { 162 Log.w(TAG, "Activity result no fragment exists for index: 0x" 163 + Integer.toHexString(requestCode)); 164 } else { 165 frag.onActivityResult(requestCode&0xffff, resultCode, data); 166 } 167 return; 168 } 169 170 super.onActivityResult(requestCode, resultCode, data); 171 } 172 173 /** 174 * Take care of popping the fragment back stack or finishing the activity 175 * as appropriate. 176 */ 177 public void onBackPressed() { 178 if (!mFragments.popBackStackImmediate()) { 179 supportFinishAfterTransition(); 180 } 181 } 182 183 /** 184 * Reverses the Activity Scene entry Transition and triggers the calling Activity 185 * to reverse its exit Transition. When the exit Transition completes, 186 * {@link #finish()} is called. If no entry Transition was used, finish() is called 187 * immediately and the Activity exit Transition is run. 188 * 189 * <p>On Android 4.4 or lower, this method only finishes the Activity with no 190 * special exit transition.</p> 191 */ 192 public void supportFinishAfterTransition() { 193 ActivityCompat.finishAfterTransition(this); 194 } 195 196 /** 197 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 198 * android.view.View, String)} was used to start an Activity, <var>callback</var> 199 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 200 * {@link Window#FEATURE_CONTENT_TRANSITIONS}. 201 * 202 * @param callback Used to manipulate shared element transitions on the launched Activity. 203 */ 204 public void setEnterSharedElementCallback(SharedElementCallback callback) { 205 ActivityCompat.setEnterSharedElementCallback(this, callback); 206 } 207 208 /** 209 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 210 * android.view.View, String)} was used to start an Activity, <var>listener</var> 211 * will be called to handle shared elements on the <i>launching</i> Activity. Most 212 * calls will only come when returning from the started Activity. 213 * This requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 214 * 215 * @param listener Used to manipulate shared element transitions on the launching Activity. 216 */ 217 public void setExitSharedElementCallback(SharedElementCallback listener) { 218 ActivityCompat.setExitSharedElementCallback(this, listener); 219 } 220 221 /** 222 * Support library version of {@link android.app.Activity#postponeEnterTransition()} that works 223 * only on API 21 and later. 224 */ 225 public void supportPostponeEnterTransition() { 226 ActivityCompat.postponeEnterTransition(this); 227 } 228 229 /** 230 * Support library version of {@link android.app.Activity#startPostponedEnterTransition()} 231 * that only works with API 21 and later. 232 */ 233 public void supportStartPostponedEnterTransition() { 234 ActivityCompat.startPostponedEnterTransition(this); 235 } 236 237 /** 238 * Dispatch configuration change to all fragments. 239 */ 240 @Override 241 public void onConfigurationChanged(Configuration newConfig) { 242 super.onConfigurationChanged(newConfig); 243 mFragments.dispatchConfigurationChanged(newConfig); 244 } 245 246 /** 247 * Perform initialization of all fragments and loaders. 248 */ 249 @Override 250 protected void onCreate(@Nullable Bundle savedInstanceState) { 251 mFragments.attachActivity(this, mContainer, null); 252 253 super.onCreate(savedInstanceState); 254 255 NonConfigurationInstances nc = (NonConfigurationInstances) 256 getLastNonConfigurationInstance(); 257 if (nc != null) { 258 mAllLoaderManagers = nc.loaders; 259 } 260 if (savedInstanceState != null) { 261 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 262 mFragments.restoreAllState(p, nc != null ? nc.fragments : null); 263 } 264 mFragments.dispatchCreate(); 265 } 266 267 /** 268 * Dispatch to Fragment.onCreateOptionsMenu(). 269 */ 270 @Override 271 public boolean onCreatePanelMenu(int featureId, Menu menu) { 272 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 273 boolean show = super.onCreatePanelMenu(featureId, menu); 274 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 275 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 276 return show; 277 } 278 // Prior to Honeycomb, the framework can't invalidate the options 279 // menu, so we must always say we have one in case the app later 280 // invalidates it and needs to have it shown. 281 return true; 282 } 283 return super.onCreatePanelMenu(featureId, menu); 284 } 285 286 @Override 287 final View dispatchFragmentsOnCreateView(View parent, String name, Context context, 288 AttributeSet attrs) { 289 return mFragments.onCreateView(parent, name, context, attrs); 290 } 291 292 /** 293 * Destroy all fragments and loaders. 294 */ 295 @Override 296 protected void onDestroy() { 297 super.onDestroy(); 298 299 doReallyStop(false); 300 301 mFragments.dispatchDestroy(); 302 if (mLoaderManager != null) { 303 mLoaderManager.doDestroy(); 304 } 305 } 306 307 /** 308 * Take care of calling onBackPressed() for pre-Eclair platforms. 309 */ 310 @Override 311 public boolean onKeyDown(int keyCode, KeyEvent event) { 312 if (android.os.Build.VERSION.SDK_INT < 5 /* ECLAIR */ 313 && keyCode == KeyEvent.KEYCODE_BACK 314 && event.getRepeatCount() == 0) { 315 // Take care of calling this method on earlier versions of 316 // the platform where it doesn't exist. 317 onBackPressed(); 318 return true; 319 } 320 321 return super.onKeyDown(keyCode, event); 322 } 323 324 /** 325 * Dispatch onLowMemory() to all fragments. 326 */ 327 @Override 328 public void onLowMemory() { 329 super.onLowMemory(); 330 mFragments.dispatchLowMemory(); 331 } 332 333 /** 334 * Dispatch context and options menu to fragments. 335 */ 336 @Override 337 public boolean onMenuItemSelected(int featureId, MenuItem item) { 338 if (super.onMenuItemSelected(featureId, item)) { 339 return true; 340 } 341 342 switch (featureId) { 343 case Window.FEATURE_OPTIONS_PANEL: 344 return mFragments.dispatchOptionsItemSelected(item); 345 346 case Window.FEATURE_CONTEXT_MENU: 347 return mFragments.dispatchContextItemSelected(item); 348 349 default: 350 return false; 351 } 352 } 353 354 /** 355 * Call onOptionsMenuClosed() on fragments. 356 */ 357 @Override 358 public void onPanelClosed(int featureId, Menu menu) { 359 switch (featureId) { 360 case Window.FEATURE_OPTIONS_PANEL: 361 mFragments.dispatchOptionsMenuClosed(menu); 362 break; 363 } 364 super.onPanelClosed(featureId, menu); 365 } 366 367 /** 368 * Dispatch onPause() to fragments. 369 */ 370 @Override 371 protected void onPause() { 372 super.onPause(); 373 mResumed = false; 374 if (mHandler.hasMessages(MSG_RESUME_PENDING)) { 375 mHandler.removeMessages(MSG_RESUME_PENDING); 376 onResumeFragments(); 377 } 378 mFragments.dispatchPause(); 379 } 380 381 /** 382 * Handle onNewIntent() to inform the fragment manager that the 383 * state is not saved. If you are handling new intents and may be 384 * making changes to the fragment state, you want to be sure to call 385 * through to the super-class here first. Otherwise, if your state 386 * is saved but the activity is not stopped, you could get an 387 * onNewIntent() call which happens before onResume() and trying to 388 * perform fragment operations at that point will throw IllegalStateException 389 * because the fragment manager thinks the state is still saved. 390 */ 391 @Override 392 protected void onNewIntent(Intent intent) { 393 super.onNewIntent(intent); 394 mFragments.noteStateNotSaved(); 395 } 396 397 /** 398 * Dispatch onResume() to fragments. Note that for better inter-operation 399 * with older versions of the platform, at the point of this call the 400 * fragments attached to the activity are <em>not</em> resumed. This means 401 * that in some cases the previous state may still be saved, not allowing 402 * fragment transactions that modify the state. To correctly interact 403 * with fragments in their proper state, you should instead override 404 * {@link #onResumeFragments()}. 405 */ 406 @Override 407 protected void onResume() { 408 super.onResume(); 409 mHandler.sendEmptyMessage(MSG_RESUME_PENDING); 410 mResumed = true; 411 mFragments.execPendingActions(); 412 } 413 414 /** 415 * Dispatch onResume() to fragments. 416 */ 417 @Override 418 protected void onPostResume() { 419 super.onPostResume(); 420 mHandler.removeMessages(MSG_RESUME_PENDING); 421 onResumeFragments(); 422 mFragments.execPendingActions(); 423 } 424 425 /** 426 * This is the fragment-orientated version of {@link #onResume()} that you 427 * can override to perform operations in the Activity at the same point 428 * where its fragments are resumed. Be sure to always call through to 429 * the super-class. 430 */ 431 protected void onResumeFragments() { 432 mFragments.dispatchResume(); 433 } 434 435 /** 436 * Dispatch onPrepareOptionsMenu() to fragments. 437 */ 438 @Override 439 public boolean onPreparePanel(int featureId, View view, Menu menu) { 440 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 441 if (mOptionsMenuInvalidated) { 442 mOptionsMenuInvalidated = false; 443 menu.clear(); 444 onCreatePanelMenu(featureId, menu); 445 } 446 boolean goforit = onPrepareOptionsPanel(view, menu); 447 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 448 return goforit; 449 } 450 return super.onPreparePanel(featureId, view, menu); 451 } 452 453 /** 454 * @hide 455 */ 456 protected boolean onPrepareOptionsPanel(View view, Menu menu) { 457 return super.onPreparePanel(Window.FEATURE_OPTIONS_PANEL, view, menu); 458 } 459 460 /** 461 * Retain all appropriate fragment and loader state. You can NOT 462 * override this yourself! Use {@link #onRetainCustomNonConfigurationInstance()} 463 * if you want to retain your own state. 464 */ 465 @Override 466 public final Object onRetainNonConfigurationInstance() { 467 if (mStopped) { 468 doReallyStop(true); 469 } 470 471 Object custom = onRetainCustomNonConfigurationInstance(); 472 473 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 474 boolean retainLoaders = false; 475 if (mAllLoaderManagers != null) { 476 // prune out any loader managers that were already stopped and so 477 // have nothing useful to retain. 478 final int N = mAllLoaderManagers.size(); 479 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 480 for (int i=N-1; i>=0; i--) { 481 loaders[i] = mAllLoaderManagers.valueAt(i); 482 } 483 for (int i=0; i<N; i++) { 484 LoaderManagerImpl lm = loaders[i]; 485 if (lm.mRetaining) { 486 retainLoaders = true; 487 } else { 488 lm.doDestroy(); 489 mAllLoaderManagers.remove(lm.mWho); 490 } 491 } 492 } 493 if (fragments == null && !retainLoaders && custom == null) { 494 return null; 495 } 496 497 NonConfigurationInstances nci = new NonConfigurationInstances(); 498 nci.activity = null; 499 nci.custom = custom; 500 nci.children = null; 501 nci.fragments = fragments; 502 nci.loaders = mAllLoaderManagers; 503 return nci; 504 } 505 506 /** 507 * Save all appropriate fragment state. 508 */ 509 @Override 510 protected void onSaveInstanceState(Bundle outState) { 511 super.onSaveInstanceState(outState); 512 Parcelable p = mFragments.saveAllState(); 513 if (p != null) { 514 outState.putParcelable(FRAGMENTS_TAG, p); 515 } 516 } 517 518 /** 519 * Dispatch onStart() to all fragments. Ensure any created loaders are 520 * now started. 521 */ 522 @Override 523 protected void onStart() { 524 super.onStart(); 525 526 mStopped = false; 527 mReallyStopped = false; 528 mHandler.removeMessages(MSG_REALLY_STOPPED); 529 530 if (!mCreated) { 531 mCreated = true; 532 mFragments.dispatchActivityCreated(); 533 } 534 535 mFragments.noteStateNotSaved(); 536 mFragments.execPendingActions(); 537 538 if (!mLoadersStarted) { 539 mLoadersStarted = true; 540 if (mLoaderManager != null) { 541 mLoaderManager.doStart(); 542 } else if (!mCheckedForLoaderManager) { 543 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, false); 544 // the returned loader manager may be a new one, so we have to start it 545 if ((mLoaderManager != null) && (!mLoaderManager.mStarted)) { 546 mLoaderManager.doStart(); 547 } 548 } 549 mCheckedForLoaderManager = true; 550 } 551 // NOTE: HC onStart goes here. 552 553 mFragments.dispatchStart(); 554 if (mAllLoaderManagers != null) { 555 final int N = mAllLoaderManagers.size(); 556 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 557 for (int i=N-1; i>=0; i--) { 558 loaders[i] = mAllLoaderManagers.valueAt(i); 559 } 560 for (int i=0; i<N; i++) { 561 LoaderManagerImpl lm = loaders[i]; 562 lm.finishRetain(); 563 lm.doReportStart(); 564 } 565 } 566 } 567 568 /** 569 * Dispatch onStop() to all fragments. Ensure all loaders are stopped. 570 */ 571 @Override 572 protected void onStop() { 573 super.onStop(); 574 575 mStopped = true; 576 mHandler.sendEmptyMessage(MSG_REALLY_STOPPED); 577 578 mFragments.dispatchStop(); 579 } 580 581 // ------------------------------------------------------------------------ 582 // NEW METHODS 583 // ------------------------------------------------------------------------ 584 585 /** 586 * Use this instead of {@link #onRetainNonConfigurationInstance()}. 587 * Retrieve later with {@link #getLastCustomNonConfigurationInstance()}. 588 */ 589 public Object onRetainCustomNonConfigurationInstance() { 590 return null; 591 } 592 593 /** 594 * Return the value previously returned from 595 * {@link #onRetainCustomNonConfigurationInstance()}. 596 */ 597 public Object getLastCustomNonConfigurationInstance() { 598 NonConfigurationInstances nc = (NonConfigurationInstances) 599 getLastNonConfigurationInstance(); 600 return nc != null ? nc.custom : null; 601 } 602 603 /** 604 * Support library version of {@link Activity#invalidateOptionsMenu}. 605 * 606 * <p>Invalidate the activity's options menu. This will cause relevant presentations 607 * of the menu to fully update via calls to onCreateOptionsMenu and 608 * onPrepareOptionsMenu the next time the menu is requested. 609 */ 610 public void supportInvalidateOptionsMenu() { 611 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 612 // If we are running on HC or greater, we can use the framework 613 // API to invalidate the options menu. 614 ActivityCompatHoneycomb.invalidateOptionsMenu(this); 615 return; 616 } 617 618 // Whoops, older platform... we'll use a hack, to manually rebuild 619 // the options menu the next time it is prepared. 620 mOptionsMenuInvalidated = true; 621 } 622 623 /** 624 * Print the Activity's state into the given stream. This gets invoked if 625 * you run "adb shell dumpsys activity <activity_component_name>". 626 * 627 * @param prefix Desired prefix to prepend at each line of output. 628 * @param fd The raw file descriptor that the dump is being sent to. 629 * @param writer The PrintWriter to which you should dump your state. This will be 630 * closed for you after you return. 631 * @param args additional arguments to the dump request. 632 */ 633 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 634 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 635 // XXX This can only work if we can call the super-class impl. :/ 636 //ActivityCompatHoneycomb.dump(this, prefix, fd, writer, args); 637 } 638 writer.print(prefix); writer.print("Local FragmentActivity "); 639 writer.print(Integer.toHexString(System.identityHashCode(this))); 640 writer.println(" State:"); 641 String innerPrefix = prefix + " "; 642 writer.print(innerPrefix); writer.print("mCreated="); 643 writer.print(mCreated); writer.print("mResumed="); 644 writer.print(mResumed); writer.print(" mStopped="); 645 writer.print(mStopped); writer.print(" mReallyStopped="); 646 writer.println(mReallyStopped); 647 writer.print(innerPrefix); writer.print("mLoadersStarted="); 648 writer.println(mLoadersStarted); 649 if (mLoaderManager != null) { 650 writer.print(prefix); writer.print("Loader Manager "); 651 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 652 writer.println(":"); 653 mLoaderManager.dump(prefix + " ", fd, writer, args); 654 } 655 mFragments.dump(prefix, fd, writer, args); 656 writer.print(prefix); writer.println("View Hierarchy:"); 657 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 658 } 659 660 private static String viewToString(View view) { 661 StringBuilder out = new StringBuilder(128); 662 out.append(view.getClass().getName()); 663 out.append('{'); 664 out.append(Integer.toHexString(System.identityHashCode(view))); 665 out.append(' '); 666 switch (view.getVisibility()) { 667 case View.VISIBLE: out.append('V'); break; 668 case View.INVISIBLE: out.append('I'); break; 669 case View.GONE: out.append('G'); break; 670 default: out.append('.'); break; 671 } 672 out.append(view.isFocusable() ? 'F' : '.'); 673 out.append(view.isEnabled() ? 'E' : '.'); 674 out.append(view.willNotDraw() ? '.' : 'D'); 675 out.append(view.isHorizontalScrollBarEnabled()? 'H' : '.'); 676 out.append(view.isVerticalScrollBarEnabled() ? 'V' : '.'); 677 out.append(view.isClickable() ? 'C' : '.'); 678 out.append(view.isLongClickable() ? 'L' : '.'); 679 out.append(' '); 680 out.append(view.isFocused() ? 'F' : '.'); 681 out.append(view.isSelected() ? 'S' : '.'); 682 out.append(view.isPressed() ? 'P' : '.'); 683 out.append(' '); 684 out.append(view.getLeft()); 685 out.append(','); 686 out.append(view.getTop()); 687 out.append('-'); 688 out.append(view.getRight()); 689 out.append(','); 690 out.append(view.getBottom()); 691 final int id = view.getId(); 692 if (id != View.NO_ID) { 693 out.append(" #"); 694 out.append(Integer.toHexString(id)); 695 final Resources r = view.getResources(); 696 if (id != 0 && r != null) { 697 try { 698 String pkgname; 699 switch (id&0xff000000) { 700 case 0x7f000000: 701 pkgname="app"; 702 break; 703 case 0x01000000: 704 pkgname="android"; 705 break; 706 default: 707 pkgname = r.getResourcePackageName(id); 708 break; 709 } 710 String typename = r.getResourceTypeName(id); 711 String entryname = r.getResourceEntryName(id); 712 out.append(" "); 713 out.append(pkgname); 714 out.append(":"); 715 out.append(typename); 716 out.append("/"); 717 out.append(entryname); 718 } catch (Resources.NotFoundException e) { 719 } 720 } 721 } 722 out.append("}"); 723 return out.toString(); 724 } 725 726 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 727 writer.print(prefix); 728 if (view == null) { 729 writer.println("null"); 730 return; 731 } 732 writer.println(viewToString(view)); 733 if (!(view instanceof ViewGroup)) { 734 return; 735 } 736 ViewGroup grp = (ViewGroup)view; 737 final int N = grp.getChildCount(); 738 if (N <= 0) { 739 return; 740 } 741 prefix = prefix + " "; 742 for (int i=0; i<N; i++) { 743 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 744 } 745 } 746 747 void doReallyStop(boolean retaining) { 748 if (!mReallyStopped) { 749 mReallyStopped = true; 750 mRetaining = retaining; 751 mHandler.removeMessages(MSG_REALLY_STOPPED); 752 onReallyStop(); 753 } 754 } 755 756 /** 757 * Pre-HC, we didn't have a way to determine whether an activity was 758 * being stopped for a config change or not until we saw 759 * onRetainNonConfigurationInstance() called after onStop(). However 760 * we need to know this, to know whether to retain fragments. This will 761 * tell us what we need to know. 762 */ 763 void onReallyStop() { 764 if (mLoadersStarted) { 765 mLoadersStarted = false; 766 if (mLoaderManager != null) { 767 if (!mRetaining) { 768 mLoaderManager.doStop(); 769 } else { 770 mLoaderManager.doRetain(); 771 } 772 } 773 } 774 775 mFragments.dispatchReallyStop(); 776 } 777 778 // ------------------------------------------------------------------------ 779 // FRAGMENT SUPPORT 780 // ------------------------------------------------------------------------ 781 782 /** 783 * Called when a fragment is attached to the activity. 784 */ 785 public void onAttachFragment(Fragment fragment) { 786 } 787 788 /** 789 * Return the FragmentManager for interacting with fragments associated 790 * with this activity. 791 */ 792 public FragmentManager getSupportFragmentManager() { 793 return mFragments; 794 } 795 796 /** 797 * Modifies the standard behavior to allow results to be delivered to fragments. 798 * This imposes a restriction that requestCode be <= 0xffff. 799 */ 800 @Override 801 public void startActivityForResult(Intent intent, int requestCode) { 802 if (requestCode != -1 && (requestCode&0xffff0000) != 0) { 803 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 804 } 805 super.startActivityForResult(intent, requestCode); 806 } 807 808 /** 809 * Called by Fragment.startActivityForResult() to implement its behavior. 810 */ 811 public void startActivityFromFragment(Fragment fragment, Intent intent, 812 int requestCode) { 813 if (requestCode == -1) { 814 super.startActivityForResult(intent, -1); 815 return; 816 } 817 if ((requestCode&0xffff0000) != 0) { 818 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 819 } 820 super.startActivityForResult(intent, ((fragment.mIndex+1)<<16) + (requestCode&0xffff)); 821 } 822 823 void invalidateSupportFragment(String who) { 824 //Log.v(TAG, "invalidateSupportFragment: who=" + who); 825 if (mAllLoaderManagers != null) { 826 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 827 if (lm != null && !lm.mRetaining) { 828 lm.doDestroy(); 829 mAllLoaderManagers.remove(who); 830 } 831 } 832 } 833 834 // ------------------------------------------------------------------------ 835 // LOADER SUPPORT 836 // ------------------------------------------------------------------------ 837 838 /** 839 * Return the LoaderManager for this fragment, creating it if needed. 840 */ 841 public LoaderManager getSupportLoaderManager() { 842 if (mLoaderManager != null) { 843 return mLoaderManager; 844 } 845 mCheckedForLoaderManager = true; 846 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, true); 847 return mLoaderManager; 848 } 849 850 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 851 if (mAllLoaderManagers == null) { 852 mAllLoaderManagers = new SimpleArrayMap<String, LoaderManagerImpl>(); 853 } 854 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 855 if (lm == null) { 856 if (create) { 857 lm = new LoaderManagerImpl(who, this, started); 858 mAllLoaderManagers.put(who, lm); 859 } 860 } else { 861 lm.updateActivity(this); 862 } 863 return lm; 864 } 865} 866