FragmentActivity.java revision 8205f0588fe605821216e4b9fe2c26709c4db8be
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.TypedArray; 24import android.os.Bundle; 25import android.os.Handler; 26import android.os.Message; 27import android.os.Parcelable; 28import android.util.AttributeSet; 29import android.util.Log; 30import android.view.KeyEvent; 31import android.view.Menu; 32import android.view.MenuItem; 33import android.view.View; 34import android.view.Window; 35 36import java.io.FileDescriptor; 37import java.io.PrintWriter; 38import java.util.ArrayList; 39import java.util.HashMap; 40 41/** 42 * Base class for activities that want to use the support-based 43 * {@link android.support.v4.app.Fragment} and 44 * {@link android.support.v4.content.Loader} APIs. 45 * 46 * <p>When using this class as opposed to new platform's built-in fragment 47 * and loader support, you must use the {@link #getSupportFragmentManager()} 48 * and {@link #getSupportLoaderManager()} methods respectively to access 49 * those features. 50 * 51 * <p>Known limitations:</p> 52 * <ul> 53 * <li> <p>When using the <fragment> tag, this implementation can not 54 * use the parent view's ID as the new fragment's ID. You must explicitly 55 * specify an ID (or tag) in the <fragment>.</p> 56 * <li> <p>Prior to Honeycomb (3.0), an activity's state was saved before pausing. 57 * Fragments are a significant amount of new state, and dynamic enough that one 58 * often wants them to change between pausing and stopping. These classes 59 * throw an exception if you try to change the fragment state after it has been 60 * saved, to avoid accidental loss of UI state. However this is too restrictive 61 * prior to Honeycomb, where the state is saved before pausing. To address this, 62 * when running on platforms prior to Honeycomb an exception will not be thrown 63 * if you change fragments between the state save and the activity being stopped. 64 * This means that in some cases if the activity is restored from its last saved 65 * state, this may be a snapshot slightly before what the user last saw.</p> 66 * </ul> 67 */ 68public class FragmentActivity extends Activity { 69 private static final String TAG = "FragmentActivity"; 70 71 private static final String FRAGMENTS_TAG = "android:support:fragments"; 72 73 // This is the SDK API version of Honeycomb (3.0). 74 private static final int HONEYCOMB = 11; 75 76 static final int MSG_REALLY_STOPPED = 1; 77 static final int MSG_RESUME_PENDING = 2; 78 79 final Handler mHandler = new Handler() { 80 @Override 81 public void handleMessage(Message msg) { 82 switch (msg.what) { 83 case MSG_REALLY_STOPPED: 84 if (mStopped) { 85 doReallyStop(false); 86 } 87 break; 88 case MSG_RESUME_PENDING: 89 mFragments.dispatchResume(); 90 mFragments.execPendingActions(); 91 break; 92 default: 93 super.handleMessage(msg); 94 } 95 } 96 97 }; 98 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 99 100 boolean mCreated; 101 boolean mResumed; 102 boolean mStopped; 103 boolean mReallyStopped; 104 boolean mRetaining; 105 106 boolean mOptionsMenuInvalidated; 107 108 boolean mCheckedForLoaderManager; 109 boolean mLoadersStarted; 110 HCSparseArray<LoaderManagerImpl> mAllLoaderManagers; 111 LoaderManagerImpl mLoaderManager; 112 113 static final class NonConfigurationInstances { 114 Object activity; 115 Object custom; 116 HashMap<String, Object> children; 117 ArrayList<Fragment> fragments; 118 HCSparseArray<LoaderManagerImpl> loaders; 119 } 120 121 static class FragmentTag { 122 public static final int[] Fragment = { 123 0x01010003, 0x010100d0, 0x010100d1 124 }; 125 public static final int Fragment_id = 1; 126 public static final int Fragment_name = 0; 127 public static final int Fragment_tag = 2; 128 } 129 130 // ------------------------------------------------------------------------ 131 // HOOKS INTO ACTIVITY 132 // ------------------------------------------------------------------------ 133 134 /** 135 * Dispatch incoming result to the correct fragment. 136 */ 137 @Override 138 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 139 int index = requestCode>>16; 140 if (index != 0) { 141 index--; 142 if (mFragments.mActive == null || index < 0 || index >= mFragments.mActive.size()) { 143 Log.w(TAG, "Activity result fragment index out of range: 0x" 144 + Integer.toHexString(requestCode)); 145 return; 146 } 147 Fragment frag = mFragments.mActive.get(index); 148 if (frag == null) { 149 Log.w(TAG, "Activity result no fragment exists for index: 0x" 150 + Integer.toHexString(requestCode)); 151 } else { 152 frag.onActivityResult(requestCode&0xffff, resultCode, data); 153 } 154 return; 155 } 156 157 super.onActivityResult(requestCode, resultCode, data); 158 } 159 160 /** 161 * Take care of popping the fragment back stack or finishing the activity 162 * as appropriate. 163 */ 164 public void onBackPressed() { 165 if (!mFragments.popBackStackImmediate()) { 166 finish(); 167 } 168 } 169 170 /** 171 * Dispatch configuration change to all fragments. 172 */ 173 @Override 174 public void onConfigurationChanged(Configuration newConfig) { 175 super.onConfigurationChanged(newConfig); 176 mFragments.dispatchConfigurationChanged(newConfig); 177 } 178 179 /** 180 * Perform initialization of all fragments and loaders. 181 */ 182 @Override 183 protected void onCreate(Bundle savedInstanceState) { 184 mFragments.attachActivity(this); 185 // Old versions of the platform didn't do this! 186 if (getLayoutInflater().getFactory() == null) { 187 getLayoutInflater().setFactory(this); 188 } 189 190 super.onCreate(savedInstanceState); 191 192 NonConfigurationInstances nc = (NonConfigurationInstances) 193 getLastNonConfigurationInstance(); 194 if (nc != null) { 195 mAllLoaderManagers = nc.loaders; 196 } 197 if (savedInstanceState != null) { 198 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 199 mFragments.restoreAllState(p, nc != null ? nc.fragments : null); 200 } 201 mFragments.dispatchCreate(); 202 } 203 204 /** 205 * Dispatch to Fragment.onCreateOptionsMenu(). 206 */ 207 @Override 208 public boolean onCreatePanelMenu(int featureId, Menu menu) { 209 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 210 boolean show = super.onCreatePanelMenu(featureId, menu); 211 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 212 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 213 return show; 214 } 215 // Prior to Honeycomb, the framework can't invalidate the options 216 // menu, so we must always say we have one in case the app later 217 // invalidates it and needs to have it shown. 218 return true; 219 } 220 return super.onCreatePanelMenu(featureId, menu); 221 } 222 223 /** 224 * Add support for inflating the <fragment> tag. 225 */ 226 @Override 227 public View onCreateView(String name, Context context, AttributeSet attrs) { 228 if (!"fragment".equals(name)) { 229 return super.onCreateView(name, context, attrs); 230 } 231 232 String fname = attrs.getAttributeValue(null, "class"); 233 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 234 if (fname == null) { 235 fname = a.getString(FragmentTag.Fragment_name); 236 } 237 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 238 String tag = a.getString(FragmentTag.Fragment_tag); 239 a.recycle(); 240 241 View parent = null; // NOTE: no way to get parent pre-Honeycomb. 242 int containerId = parent != null ? parent.getId() : 0; 243 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 244 throw new IllegalArgumentException(attrs.getPositionDescription() 245 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 246 } 247 248 // If we restored from a previous state, we may already have 249 // instantiated this fragment from the state and should use 250 // that instance instead of making a new one. 251 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 252 if (fragment == null && tag != null) { 253 fragment = mFragments.findFragmentByTag(tag); 254 } 255 if (fragment == null && containerId != View.NO_ID) { 256 fragment = mFragments.findFragmentById(containerId); 257 } 258 259 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 260 + Integer.toHexString(id) + " fname=" + fname 261 + " existing=" + fragment); 262 if (fragment == null) { 263 fragment = Fragment.instantiate(this, fname); 264 fragment.mFromLayout = true; 265 fragment.mFragmentId = id != 0 ? id : containerId; 266 fragment.mContainerId = containerId; 267 fragment.mTag = tag; 268 fragment.mInLayout = true; 269 fragment.mFragmentManager = mFragments; 270 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 271 mFragments.addFragment(fragment, true); 272 273 } else if (fragment.mInLayout) { 274 // A fragment already exists and it is not one we restored from 275 // previous state. 276 throw new IllegalArgumentException(attrs.getPositionDescription() 277 + ": Duplicate id 0x" + Integer.toHexString(id) 278 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 279 + " with another fragment for " + fname); 280 } else { 281 // This fragment was retained from a previous instance; get it 282 // going now. 283 fragment.mInLayout = true; 284 // If this fragment is newly instantiated (either right now, or 285 // from last saved state), then give it the attributes to 286 // initialize itself. 287 if (!fragment.mRetaining) { 288 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 289 } 290 mFragments.moveToState(fragment); 291 } 292 293 if (fragment.mView == null) { 294 throw new IllegalStateException("Fragment " + fname 295 + " did not create a view."); 296 } 297 if (id != 0) { 298 fragment.mView.setId(id); 299 } 300 if (fragment.mView.getTag() == null) { 301 fragment.mView.setTag(tag); 302 } 303 return fragment.mView; 304 } 305 306 /** 307 * Destroy all fragments and loaders. 308 */ 309 @Override 310 protected void onDestroy() { 311 super.onDestroy(); 312 313 doReallyStop(false); 314 315 mFragments.dispatchDestroy(); 316 if (mLoaderManager != null) { 317 mLoaderManager.doDestroy(); 318 } 319 } 320 321 /** 322 * Take care of calling onBackPressed() for pre-Eclair platforms. 323 */ 324 @Override 325 public boolean onKeyDown(int keyCode, KeyEvent event) { 326 if (android.os.Build.VERSION.SDK_INT < 5 /* ECLAIR */ 327 && keyCode == KeyEvent.KEYCODE_BACK 328 && event.getRepeatCount() == 0) { 329 // Take care of calling this method on earlier versions of 330 // the platform where it doesn't exist. 331 onBackPressed(); 332 return true; 333 } 334 335 return super.onKeyDown(keyCode, event); 336 } 337 338 /** 339 * Dispatch onLowMemory() to all fragments. 340 */ 341 @Override 342 public void onLowMemory() { 343 super.onLowMemory(); 344 mFragments.dispatchLowMemory(); 345 } 346 347 /** 348 * Dispatch context and options menu to fragments. 349 */ 350 @Override 351 public boolean onMenuItemSelected(int featureId, MenuItem item) { 352 if (super.onMenuItemSelected(featureId, item)) { 353 return true; 354 } 355 356 switch (featureId) { 357 case Window.FEATURE_OPTIONS_PANEL: 358 return mFragments.dispatchOptionsItemSelected(item); 359 360 case Window.FEATURE_CONTEXT_MENU: 361 return mFragments.dispatchContextItemSelected(item); 362 363 default: 364 return false; 365 } 366 } 367 368 /** 369 * Call onOptionsMenuClosed() on fragments. 370 */ 371 @Override 372 public void onPanelClosed(int featureId, Menu menu) { 373 switch (featureId) { 374 case Window.FEATURE_OPTIONS_PANEL: 375 mFragments.dispatchOptionsMenuClosed(menu); 376 break; 377 } 378 super.onPanelClosed(featureId, menu); 379 } 380 381 /** 382 * Dispatch onPause() to fragments. 383 */ 384 @Override 385 protected void onPause() { 386 super.onPause(); 387 mResumed = false; 388 if (mHandler.hasMessages(MSG_RESUME_PENDING)) { 389 mHandler.removeMessages(MSG_RESUME_PENDING); 390 mFragments.dispatchResume(); 391 } 392 mFragments.dispatchPause(); 393 } 394 395 /** 396 * Dispatch onResume() to fragments. 397 */ 398 @Override 399 protected void onResume() { 400 super.onResume(); 401 mHandler.sendEmptyMessage(MSG_RESUME_PENDING); 402 mResumed = true; 403 mFragments.execPendingActions(); 404 } 405 406 /** 407 * Dispatch onResume() to fragments. 408 */ 409 @Override 410 protected void onPostResume() { 411 super.onPostResume(); 412 mHandler.removeMessages(MSG_RESUME_PENDING); 413 mFragments.dispatchResume(); 414 mFragments.execPendingActions(); 415 } 416 417 /** 418 * Dispatch onPrepareOptionsMenu() to fragments. 419 */ 420 @Override 421 public boolean onPreparePanel(int featureId, View view, Menu menu) { 422 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 423 if (mOptionsMenuInvalidated) { 424 mOptionsMenuInvalidated = false; 425 menu.clear(); 426 onCreatePanelMenu(featureId, menu); 427 } 428 boolean goforit = super.onPreparePanel(featureId, view, menu); 429 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 430 return goforit && menu.hasVisibleItems(); 431 } 432 return super.onPreparePanel(featureId, view, menu); 433 } 434 435 /** 436 * Retain all appropriate fragment and loader state. You can NOT 437 * override this yourself! Use {@link #onRetainCustomNonConfigurationInstance()} 438 * if you want to retain your own state. 439 */ 440 @Override 441 public final Object onRetainNonConfigurationInstance() { 442 if (mStopped) { 443 doReallyStop(true); 444 } 445 446 Object custom = onRetainCustomNonConfigurationInstance(); 447 448 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 449 boolean retainLoaders = false; 450 if (mAllLoaderManagers != null) { 451 // prune out any loader managers that were already stopped and so 452 // have nothing useful to retain. 453 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 454 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 455 if (lm.mRetaining) { 456 retainLoaders = true; 457 } else { 458 lm.doDestroy(); 459 mAllLoaderManagers.removeAt(i); 460 } 461 } 462 } 463 if (fragments == null && !retainLoaders && custom == null) { 464 return null; 465 } 466 467 NonConfigurationInstances nci = new NonConfigurationInstances(); 468 nci.activity = null; 469 nci.custom = custom; 470 nci.children = null; 471 nci.fragments = fragments; 472 nci.loaders = mAllLoaderManagers; 473 return nci; 474 } 475 476 /** 477 * Save all appropriate fragment state. 478 */ 479 @Override 480 protected void onSaveInstanceState(Bundle outState) { 481 super.onSaveInstanceState(outState); 482 Parcelable p = mFragments.saveAllState(); 483 if (p != null) { 484 outState.putParcelable(FRAGMENTS_TAG, p); 485 } 486 } 487 488 /** 489 * Dispatch onStart() to all fragments. Ensure any created loaders are 490 * now started. 491 */ 492 @Override 493 protected void onStart() { 494 super.onStart(); 495 496 mStopped = false; 497 mReallyStopped = false; 498 mHandler.removeMessages(MSG_REALLY_STOPPED); 499 500 if (!mCreated) { 501 mCreated = true; 502 mFragments.dispatchActivityCreated(); 503 } 504 505 mFragments.noteStateNotSaved(); 506 mFragments.execPendingActions(); 507 508 if (!mLoadersStarted) { 509 mLoadersStarted = true; 510 if (mLoaderManager != null) { 511 mLoaderManager.doStart(); 512 } else if (!mCheckedForLoaderManager) { 513 mLoaderManager = getLoaderManager(-1, mLoadersStarted, false); 514 } 515 mCheckedForLoaderManager = true; 516 } 517 // NOTE: HC onStart goes here. 518 519 mFragments.dispatchStart(); 520 if (mAllLoaderManagers != null) { 521 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 522 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 523 lm.finishRetain(); 524 lm.doReportStart(); 525 } 526 } 527 } 528 529 /** 530 * Dispatch onStop() to all fragments. Ensure all loaders are stopped. 531 */ 532 @Override 533 protected void onStop() { 534 super.onStop(); 535 536 mStopped = true; 537 mHandler.sendEmptyMessage(MSG_REALLY_STOPPED); 538 539 mFragments.dispatchStop(); 540 } 541 542 // ------------------------------------------------------------------------ 543 // NEW METHODS 544 // ------------------------------------------------------------------------ 545 546 /** 547 * Use this instead of {@link #onRetainNonConfigurationInstance()}. 548 * Retrieve later with {@link #getLastCustomNonConfigurationInstance()}. 549 */ 550 public Object onRetainCustomNonConfigurationInstance() { 551 return null; 552 } 553 554 /** 555 * Return the value previously returned from 556 * {@link #onRetainCustomNonConfigurationInstance()}. 557 */ 558 public Object getLastCustomNonConfigurationInstance() { 559 NonConfigurationInstances nc = (NonConfigurationInstances) 560 getLastNonConfigurationInstance(); 561 return nc != null ? nc.custom : null; 562 } 563 564 void supportInvalidateOptionsMenu() { 565 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 566 // If we are running on HC or greater, we can use the framework 567 // API to invalidate the options menu. 568 ActivityCompatHoneycomb.invalidateOptionsMenu(this); 569 return; 570 } 571 572 // Whoops, older platform... we'll use a hack, to manually rebuild 573 // the options menu the next time it is prepared. 574 mOptionsMenuInvalidated = true; 575 } 576 577 /** 578 * Print the Activity's state into the given stream. This gets invoked if 579 * you run "adb shell dumpsys activity <activity_component_name>". 580 * 581 * @param prefix Desired prefix to prepend at each line of output. 582 * @param fd The raw file descriptor that the dump is being sent to. 583 * @param writer The PrintWriter to which you should dump your state. This will be 584 * closed for you after you return. 585 * @param args additional arguments to the dump request. 586 */ 587 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 588 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 589 // XXX This can only work if we can call the super-class impl. :/ 590 //ActivityCompatHoneycomb.dump(this, prefix, fd, writer, args); 591 } 592 writer.print(prefix); writer.print("Local FragmentActivity "); 593 writer.print(Integer.toHexString(System.identityHashCode(this))); 594 writer.println(" State:"); 595 String innerPrefix = prefix + " "; 596 writer.print(innerPrefix); writer.print("mCreated="); 597 writer.print(mCreated); writer.print("mResumed="); 598 writer.print(mResumed); writer.print(" mStopped="); 599 writer.print(mStopped); writer.print(" mReallyStopped="); 600 writer.println(mReallyStopped); 601 writer.print(innerPrefix); writer.print("mLoadersStarted="); 602 writer.println(mLoadersStarted); 603 if (mLoaderManager != null) { 604 writer.print(prefix); writer.print("Loader Manager "); 605 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 606 writer.println(":"); 607 mLoaderManager.dump(prefix + " ", fd, writer, args); 608 } 609 mFragments.dump(prefix, fd, writer, args); 610 } 611 612 void doReallyStop(boolean retaining) { 613 if (!mReallyStopped) { 614 mReallyStopped = true; 615 mRetaining = retaining; 616 mHandler.removeMessages(MSG_REALLY_STOPPED); 617 onReallyStop(); 618 } 619 } 620 621 /** 622 * Pre-HC, we didn't have a way to determine whether an activity was 623 * being stopped for a config change or not until we saw 624 * onRetainNonConfigurationInstance() called after onStop(). However 625 * we need to know this, to know whether to retain fragments. This will 626 * tell us what we need to know. 627 */ 628 void onReallyStop() { 629 if (mLoadersStarted) { 630 mLoadersStarted = false; 631 if (mLoaderManager != null) { 632 if (!mRetaining) { 633 mLoaderManager.doStop(); 634 } else { 635 mLoaderManager.doRetain(); 636 } 637 } 638 } 639 640 mFragments.dispatchReallyStop(); 641 } 642 643 // ------------------------------------------------------------------------ 644 // FRAGMENT SUPPORT 645 // ------------------------------------------------------------------------ 646 647 /** 648 * Called when a fragment is attached to the activity. 649 */ 650 public void onAttachFragment(Fragment fragment) { 651 } 652 653 /** 654 * Return the FragmentManager for interacting with fragments associated 655 * with this activity. 656 */ 657 public FragmentManager getSupportFragmentManager() { 658 return mFragments; 659 } 660 661 /** 662 * Modifies the standard behavior to allow results to be delivered to fragments. 663 * This imposes a restriction that requestCode be <= 0xffff. 664 */ 665 @Override 666 public void startActivityForResult(Intent intent, int requestCode) { 667 if (requestCode != -1 && (requestCode&0xffff0000) != 0) { 668 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 669 } 670 super.startActivityForResult(intent, requestCode); 671 } 672 673 /** 674 * Called by Fragment.startActivityForResult() to implement its behavior. 675 */ 676 public void startActivityFromFragment(Fragment fragment, Intent intent, 677 int requestCode) { 678 if (requestCode == -1) { 679 super.startActivityForResult(intent, -1); 680 return; 681 } 682 if ((requestCode&0xffff0000) != 0) { 683 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 684 } 685 super.startActivityForResult(intent, ((fragment.mIndex+1)<<16) + (requestCode&0xffff)); 686 } 687 688 void invalidateSupportFragmentIndex(int index) { 689 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 690 if (mAllLoaderManagers != null) { 691 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 692 if (lm != null && !lm.mRetaining) { 693 lm.doDestroy(); 694 mAllLoaderManagers.remove(index); 695 } 696 } 697 } 698 699 // ------------------------------------------------------------------------ 700 // LOADER SUPPORT 701 // ------------------------------------------------------------------------ 702 703 /** 704 * Return the LoaderManager for this fragment, creating it if needed. 705 */ 706 public LoaderManager getSupportLoaderManager() { 707 if (mLoaderManager != null) { 708 return mLoaderManager; 709 } 710 mCheckedForLoaderManager = true; 711 mLoaderManager = getLoaderManager(-1, mLoadersStarted, true); 712 return mLoaderManager; 713 } 714 715 LoaderManagerImpl getLoaderManager(int index, boolean started, boolean create) { 716 if (mAllLoaderManagers == null) { 717 mAllLoaderManagers = new HCSparseArray<LoaderManagerImpl>(); 718 } 719 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 720 if (lm == null) { 721 if (create) { 722 lm = new LoaderManagerImpl(this, started); 723 mAllLoaderManagers.put(index, lm); 724 } 725 } else { 726 lm.updateActivity(this); 727 } 728 return lm; 729 } 730} 731