FragmentActivity.java revision 0adacc1aa313d757ae1c517152cef838e0f35c13
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.content.res.TypedArray; 25import android.os.Bundle; 26import android.os.Handler; 27import android.os.Message; 28import android.os.Parcelable; 29import android.support.v4.util.SparseArrayCompat; 30import android.util.AttributeSet; 31import android.util.Log; 32import android.view.KeyEvent; 33import android.view.Menu; 34import android.view.MenuItem; 35import android.view.View; 36import android.view.ViewGroup; 37import android.view.Window; 38 39import java.io.FileDescriptor; 40import java.io.PrintWriter; 41import java.util.ArrayList; 42import java.util.HashMap; 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>Known limitations:</p> 55 * <ul> 56 * <li> <p>When using the <fragment> tag, this implementation can not 57 * use the parent view's ID as the new fragment's ID. You must explicitly 58 * specify an ID (or tag) in the <fragment>.</p> 59 * <li> <p>Prior to Honeycomb (3.0), an activity's state was saved before pausing. 60 * Fragments are a significant amount of new state, and dynamic enough that one 61 * often wants them to change between pausing and stopping. These classes 62 * throw an exception if you try to change the fragment state after it has been 63 * saved, to avoid accidental loss of UI state. However this is too restrictive 64 * prior to Honeycomb, where the state is saved before pausing. To address this, 65 * when running on platforms prior to Honeycomb an exception will not be thrown 66 * if you change fragments between the state save and the activity being stopped. 67 * This means that in some cases if the activity is restored from its last saved 68 * state, this may be a snapshot slightly before what the user last saw.</p> 69 * </ul> 70 */ 71public class FragmentActivity extends Activity { 72 private static final String TAG = "FragmentActivity"; 73 74 static final String FRAGMENTS_TAG = "android:support:fragments"; 75 76 // This is the SDK API version of Honeycomb (3.0). 77 private static final int HONEYCOMB = 11; 78 79 static final int MSG_REALLY_STOPPED = 1; 80 static final int MSG_RESUME_PENDING = 2; 81 82 final Handler mHandler = new Handler() { 83 @Override 84 public void handleMessage(Message msg) { 85 switch (msg.what) { 86 case MSG_REALLY_STOPPED: 87 if (mStopped) { 88 doReallyStop(false); 89 } 90 break; 91 case MSG_RESUME_PENDING: 92 onResumeFragments(); 93 mFragments.execPendingActions(); 94 break; 95 default: 96 super.handleMessage(msg); 97 } 98 } 99 100 }; 101 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 102 final FragmentContainer mContainer = new FragmentContainer() { 103 @Override 104 public View findViewById(int id) { 105 return FragmentActivity.this.findViewById(id); 106 } 107 }; 108 109 boolean mCreated; 110 boolean mResumed; 111 boolean mStopped; 112 boolean mReallyStopped; 113 boolean mRetaining; 114 115 boolean mOptionsMenuInvalidated; 116 117 boolean mCheckedForLoaderManager; 118 boolean mLoadersStarted; 119 HashMap<String, LoaderManagerImpl> mAllLoaderManagers; 120 LoaderManagerImpl mLoaderManager; 121 122 static final class NonConfigurationInstances { 123 Object activity; 124 Object custom; 125 HashMap<String, Object> children; 126 ArrayList<Fragment> fragments; 127 HashMap<String, LoaderManagerImpl> loaders; 128 } 129 130 static class FragmentTag { 131 public static final int[] Fragment = { 132 0x01010003, 0x010100d0, 0x010100d1 133 }; 134 public static final int Fragment_id = 1; 135 public static final int Fragment_name = 0; 136 public static final int Fragment_tag = 2; 137 } 138 139 // ------------------------------------------------------------------------ 140 // HOOKS INTO ACTIVITY 141 // ------------------------------------------------------------------------ 142 143 /** 144 * Dispatch incoming result to the correct fragment. 145 */ 146 @Override 147 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 148 int index = requestCode>>16; 149 if (index != 0) { 150 index--; 151 if (mFragments.mActive == null || index < 0 || index >= mFragments.mActive.size()) { 152 Log.w(TAG, "Activity result fragment index out of range: 0x" 153 + Integer.toHexString(requestCode)); 154 return; 155 } 156 Fragment frag = mFragments.mActive.get(index); 157 if (frag == null) { 158 Log.w(TAG, "Activity result no fragment exists for index: 0x" 159 + Integer.toHexString(requestCode)); 160 } else { 161 frag.onActivityResult(requestCode&0xffff, resultCode, data); 162 } 163 return; 164 } 165 166 super.onActivityResult(requestCode, resultCode, data); 167 } 168 169 /** 170 * Take care of popping the fragment back stack or finishing the activity 171 * as appropriate. 172 */ 173 public void onBackPressed() { 174 if (!mFragments.popBackStackImmediate()) { 175 finish(); 176 } 177 } 178 179 /** 180 * Dispatch configuration change to all fragments. 181 */ 182 @Override 183 public void onConfigurationChanged(Configuration newConfig) { 184 super.onConfigurationChanged(newConfig); 185 mFragments.dispatchConfigurationChanged(newConfig); 186 } 187 188 /** 189 * Perform initialization of all fragments and loaders. 190 */ 191 @Override 192 protected void onCreate(Bundle savedInstanceState) { 193 mFragments.attachActivity(this, mContainer, null); 194 // Old versions of the platform didn't do this! 195 if (getLayoutInflater().getFactory() == null) { 196 getLayoutInflater().setFactory(this); 197 } 198 199 super.onCreate(savedInstanceState); 200 201 NonConfigurationInstances nc = (NonConfigurationInstances) 202 getLastNonConfigurationInstance(); 203 if (nc != null) { 204 mAllLoaderManagers = nc.loaders; 205 } 206 if (savedInstanceState != null) { 207 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 208 mFragments.restoreAllState(p, nc != null ? nc.fragments : null); 209 } 210 mFragments.dispatchCreate(); 211 } 212 213 /** 214 * Dispatch to Fragment.onCreateOptionsMenu(). 215 */ 216 @Override 217 public boolean onCreatePanelMenu(int featureId, Menu menu) { 218 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 219 boolean show = super.onCreatePanelMenu(featureId, menu); 220 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 221 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 222 return show; 223 } 224 // Prior to Honeycomb, the framework can't invalidate the options 225 // menu, so we must always say we have one in case the app later 226 // invalidates it and needs to have it shown. 227 return true; 228 } 229 return super.onCreatePanelMenu(featureId, menu); 230 } 231 232 /** 233 * Add support for inflating the <fragment> tag. 234 */ 235 @Override 236 public View onCreateView(String name, Context context, AttributeSet attrs) { 237 if (!"fragment".equals(name)) { 238 return super.onCreateView(name, context, attrs); 239 } 240 241 String fname = attrs.getAttributeValue(null, "class"); 242 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 243 if (fname == null) { 244 fname = a.getString(FragmentTag.Fragment_name); 245 } 246 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 247 String tag = a.getString(FragmentTag.Fragment_tag); 248 a.recycle(); 249 250 View parent = null; // NOTE: no way to get parent pre-Honeycomb. 251 int containerId = parent != null ? parent.getId() : 0; 252 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 253 throw new IllegalArgumentException(attrs.getPositionDescription() 254 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 255 } 256 257 // If we restored from a previous state, we may already have 258 // instantiated this fragment from the state and should use 259 // that instance instead of making a new one. 260 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 261 if (fragment == null && tag != null) { 262 fragment = mFragments.findFragmentByTag(tag); 263 } 264 if (fragment == null && containerId != View.NO_ID) { 265 fragment = mFragments.findFragmentById(containerId); 266 } 267 268 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 269 + Integer.toHexString(id) + " fname=" + fname 270 + " existing=" + fragment); 271 if (fragment == null) { 272 fragment = Fragment.instantiate(this, fname); 273 fragment.mFromLayout = true; 274 fragment.mFragmentId = id != 0 ? id : containerId; 275 fragment.mContainerId = containerId; 276 fragment.mTag = tag; 277 fragment.mInLayout = true; 278 fragment.mFragmentManager = mFragments; 279 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 280 mFragments.addFragment(fragment, true); 281 282 } else if (fragment.mInLayout) { 283 // A fragment already exists and it is not one we restored from 284 // previous state. 285 throw new IllegalArgumentException(attrs.getPositionDescription() 286 + ": Duplicate id 0x" + Integer.toHexString(id) 287 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 288 + " with another fragment for " + fname); 289 } else { 290 // This fragment was retained from a previous instance; get it 291 // going now. 292 fragment.mInLayout = true; 293 // If this fragment is newly instantiated (either right now, or 294 // from last saved state), then give it the attributes to 295 // initialize itself. 296 if (!fragment.mRetaining) { 297 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 298 } 299 mFragments.moveToState(fragment); 300 } 301 302 if (fragment.mView == null) { 303 throw new IllegalStateException("Fragment " + fname 304 + " did not create a view."); 305 } 306 if (id != 0) { 307 fragment.mView.setId(id); 308 } 309 if (fragment.mView.getTag() == null) { 310 fragment.mView.setTag(tag); 311 } 312 return fragment.mView; 313 } 314 315 /** 316 * Destroy all fragments and loaders. 317 */ 318 @Override 319 protected void onDestroy() { 320 super.onDestroy(); 321 322 doReallyStop(false); 323 324 mFragments.dispatchDestroy(); 325 if (mLoaderManager != null) { 326 mLoaderManager.doDestroy(); 327 } 328 } 329 330 /** 331 * Take care of calling onBackPressed() for pre-Eclair platforms. 332 */ 333 @Override 334 public boolean onKeyDown(int keyCode, KeyEvent event) { 335 if (android.os.Build.VERSION.SDK_INT < 5 /* ECLAIR */ 336 && keyCode == KeyEvent.KEYCODE_BACK 337 && event.getRepeatCount() == 0) { 338 // Take care of calling this method on earlier versions of 339 // the platform where it doesn't exist. 340 onBackPressed(); 341 return true; 342 } 343 344 return super.onKeyDown(keyCode, event); 345 } 346 347 /** 348 * Dispatch onLowMemory() to all fragments. 349 */ 350 @Override 351 public void onLowMemory() { 352 super.onLowMemory(); 353 mFragments.dispatchLowMemory(); 354 } 355 356 /** 357 * Dispatch context and options menu to fragments. 358 */ 359 @Override 360 public boolean onMenuItemSelected(int featureId, MenuItem item) { 361 if (super.onMenuItemSelected(featureId, item)) { 362 return true; 363 } 364 365 switch (featureId) { 366 case Window.FEATURE_OPTIONS_PANEL: 367 return mFragments.dispatchOptionsItemSelected(item); 368 369 case Window.FEATURE_CONTEXT_MENU: 370 return mFragments.dispatchContextItemSelected(item); 371 372 default: 373 return false; 374 } 375 } 376 377 /** 378 * Call onOptionsMenuClosed() on fragments. 379 */ 380 @Override 381 public void onPanelClosed(int featureId, Menu menu) { 382 switch (featureId) { 383 case Window.FEATURE_OPTIONS_PANEL: 384 mFragments.dispatchOptionsMenuClosed(menu); 385 break; 386 } 387 super.onPanelClosed(featureId, menu); 388 } 389 390 /** 391 * Dispatch onPause() to fragments. 392 */ 393 @Override 394 protected void onPause() { 395 super.onPause(); 396 mResumed = false; 397 if (mHandler.hasMessages(MSG_RESUME_PENDING)) { 398 mHandler.removeMessages(MSG_RESUME_PENDING); 399 onResumeFragments(); 400 } 401 mFragments.dispatchPause(); 402 } 403 404 /** 405 * Dispatch onResume() to fragments. Note that for better inter-operation 406 * with older versions of the platform, at the point of this call the 407 * fragments attached to the activity are <em>not</em> resumed. This means 408 * that in some cases the previous state may still be saved, not allowing 409 * fragment transactions that modify the state. To correctly interact 410 * with fragments in their proper state, you should instead override 411 * {@link #onResumeFragments()}. 412 */ 413 @Override 414 protected void onResume() { 415 super.onResume(); 416 mHandler.sendEmptyMessage(MSG_RESUME_PENDING); 417 mResumed = true; 418 mFragments.execPendingActions(); 419 } 420 421 /** 422 * Dispatch onResume() to fragments. 423 */ 424 @Override 425 protected void onPostResume() { 426 super.onPostResume(); 427 mHandler.removeMessages(MSG_RESUME_PENDING); 428 onResumeFragments(); 429 mFragments.execPendingActions(); 430 } 431 432 /** 433 * This is the fragment-orientated version of {@link #onResume()} that you 434 * can override to perform operations in the Activity at the same point 435 * where its fragments are resumed. Be sure to always call through to 436 * the super-class. 437 */ 438 protected void onResumeFragments() { 439 mFragments.dispatchResume(); 440 } 441 442 /** 443 * Dispatch onPrepareOptionsMenu() to fragments. 444 */ 445 @Override 446 public boolean onPreparePanel(int featureId, View view, Menu menu) { 447 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 448 if (mOptionsMenuInvalidated) { 449 mOptionsMenuInvalidated = false; 450 menu.clear(); 451 onCreatePanelMenu(featureId, menu); 452 } 453 boolean goforit = super.onPreparePanel(featureId, view, menu); 454 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 455 return goforit && menu.hasVisibleItems(); 456 } 457 return super.onPreparePanel(featureId, 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 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 479 mAllLoaderManagers.values().toArray(loaders); 480 if (loaders != null) { 481 for (int i=0; i<loaders.length; i++) { 482 LoaderManagerImpl lm = loaders[i]; 483 if (lm.mRetaining) { 484 retainLoaders = true; 485 } else { 486 lm.doDestroy(); 487 mAllLoaderManagers.remove(lm.mWho); 488 } 489 } 490 } 491 } 492 if (fragments == null && !retainLoaders && custom == null) { 493 return null; 494 } 495 496 NonConfigurationInstances nci = new NonConfigurationInstances(); 497 nci.activity = null; 498 nci.custom = custom; 499 nci.children = null; 500 nci.fragments = fragments; 501 nci.loaders = mAllLoaderManagers; 502 return nci; 503 } 504 505 /** 506 * Save all appropriate fragment state. 507 */ 508 @Override 509 protected void onSaveInstanceState(Bundle outState) { 510 super.onSaveInstanceState(outState); 511 Parcelable p = mFragments.saveAllState(); 512 if (p != null) { 513 outState.putParcelable(FRAGMENTS_TAG, p); 514 } 515 } 516 517 /** 518 * Dispatch onStart() to all fragments. Ensure any created loaders are 519 * now started. 520 */ 521 @Override 522 protected void onStart() { 523 super.onStart(); 524 525 mStopped = false; 526 mReallyStopped = false; 527 mHandler.removeMessages(MSG_REALLY_STOPPED); 528 529 if (!mCreated) { 530 mCreated = true; 531 mFragments.dispatchActivityCreated(); 532 } 533 534 mFragments.noteStateNotSaved(); 535 mFragments.execPendingActions(); 536 537 if (!mLoadersStarted) { 538 mLoadersStarted = true; 539 if (mLoaderManager != null) { 540 mLoaderManager.doStart(); 541 } else if (!mCheckedForLoaderManager) { 542 mLoaderManager = getLoaderManager(null, mLoadersStarted, false); 543 // the returned loader manager may be a new one, so we have to start it 544 if ((mLoaderManager != null) && (!mLoaderManager.mStarted)) { 545 mLoaderManager.doStart(); 546 } 547 } 548 mCheckedForLoaderManager = true; 549 } 550 // NOTE: HC onStart goes here. 551 552 mFragments.dispatchStart(); 553 if (mAllLoaderManagers != null) { 554 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 555 mAllLoaderManagers.values().toArray(loaders); 556 if (loaders != null) { 557 for (int i=0; i<loaders.length; i++) { 558 LoaderManagerImpl lm = loaders[i]; 559 lm.finishRetain(); 560 lm.doReportStart(); 561 } 562 } 563 } 564 } 565 566 /** 567 * Dispatch onStop() to all fragments. Ensure all loaders are stopped. 568 */ 569 @Override 570 protected void onStop() { 571 super.onStop(); 572 573 mStopped = true; 574 mHandler.sendEmptyMessage(MSG_REALLY_STOPPED); 575 576 mFragments.dispatchStop(); 577 } 578 579 // ------------------------------------------------------------------------ 580 // NEW METHODS 581 // ------------------------------------------------------------------------ 582 583 /** 584 * Use this instead of {@link #onRetainNonConfigurationInstance()}. 585 * Retrieve later with {@link #getLastCustomNonConfigurationInstance()}. 586 */ 587 public Object onRetainCustomNonConfigurationInstance() { 588 return null; 589 } 590 591 /** 592 * Return the value previously returned from 593 * {@link #onRetainCustomNonConfigurationInstance()}. 594 */ 595 public Object getLastCustomNonConfigurationInstance() { 596 NonConfigurationInstances nc = (NonConfigurationInstances) 597 getLastNonConfigurationInstance(); 598 return nc != null ? nc.custom : null; 599 } 600 601 /** 602 * Invalidate the activity's options menu. This will cause relevant presentations 603 * of the menu to fully update via calls to onCreateOptionsMenu and 604 * onPrepareOptionsMenu the next time the menu is requested. 605 */ 606 public void supportInvalidateOptionsMenu() { 607 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 608 // If we are running on HC or greater, we can use the framework 609 // API to invalidate the options menu. 610 ActivityCompatHoneycomb.invalidateOptionsMenu(this); 611 return; 612 } 613 614 // Whoops, older platform... we'll use a hack, to manually rebuild 615 // the options menu the next time it is prepared. 616 mOptionsMenuInvalidated = true; 617 } 618 619 /** 620 * Print the Activity's state into the given stream. This gets invoked if 621 * you run "adb shell dumpsys activity <activity_component_name>". 622 * 623 * @param prefix Desired prefix to prepend at each line of output. 624 * @param fd The raw file descriptor that the dump is being sent to. 625 * @param writer The PrintWriter to which you should dump your state. This will be 626 * closed for you after you return. 627 * @param args additional arguments to the dump request. 628 */ 629 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 630 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 631 // XXX This can only work if we can call the super-class impl. :/ 632 //ActivityCompatHoneycomb.dump(this, prefix, fd, writer, args); 633 } 634 writer.print(prefix); writer.print("Local FragmentActivity "); 635 writer.print(Integer.toHexString(System.identityHashCode(this))); 636 writer.println(" State:"); 637 String innerPrefix = prefix + " "; 638 writer.print(innerPrefix); writer.print("mCreated="); 639 writer.print(mCreated); writer.print("mResumed="); 640 writer.print(mResumed); writer.print(" mStopped="); 641 writer.print(mStopped); writer.print(" mReallyStopped="); 642 writer.println(mReallyStopped); 643 writer.print(innerPrefix); writer.print("mLoadersStarted="); 644 writer.println(mLoadersStarted); 645 if (mLoaderManager != null) { 646 writer.print(prefix); writer.print("Loader Manager "); 647 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 648 writer.println(":"); 649 mLoaderManager.dump(prefix + " ", fd, writer, args); 650 } 651 mFragments.dump(prefix, fd, writer, args); 652 writer.print(prefix); writer.println("View Hierarchy:"); 653 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 654 } 655 656 private static String viewToString(View view) { 657 StringBuilder out = new StringBuilder(128); 658 out.append(view.getClass().getName()); 659 out.append('{'); 660 out.append(Integer.toHexString(System.identityHashCode(view))); 661 out.append(' '); 662 switch (view.getVisibility()) { 663 case View.VISIBLE: out.append('V'); break; 664 case View.INVISIBLE: out.append('I'); break; 665 case View.GONE: out.append('G'); break; 666 default: out.append('.'); break; 667 } 668 out.append(view.isFocusable() ? 'F' : '.'); 669 out.append(view.isEnabled() ? 'E' : '.'); 670 out.append(view.willNotDraw() ? '.' : 'D'); 671 out.append(view.isHorizontalScrollBarEnabled()? 'H' : '.'); 672 out.append(view.isVerticalScrollBarEnabled() ? 'V' : '.'); 673 out.append(view.isClickable() ? 'C' : '.'); 674 out.append(view.isLongClickable() ? 'L' : '.'); 675 out.append(' '); 676 out.append(view.isFocused() ? 'F' : '.'); 677 out.append(view.isSelected() ? 'S' : '.'); 678 out.append(view.isPressed() ? 'P' : '.'); 679 out.append(' '); 680 out.append(view.getLeft()); 681 out.append(','); 682 out.append(view.getTop()); 683 out.append('-'); 684 out.append(view.getRight()); 685 out.append(','); 686 out.append(view.getBottom()); 687 final int id = view.getId(); 688 if (id != View.NO_ID) { 689 out.append(" #"); 690 out.append(Integer.toHexString(id)); 691 final Resources r = view.getResources(); 692 if (id != 0 && r != null) { 693 try { 694 String pkgname; 695 switch (id&0xff000000) { 696 case 0x7f000000: 697 pkgname="app"; 698 break; 699 case 0x01000000: 700 pkgname="android"; 701 break; 702 default: 703 pkgname = r.getResourcePackageName(id); 704 break; 705 } 706 String typename = r.getResourceTypeName(id); 707 String entryname = r.getResourceEntryName(id); 708 out.append(" "); 709 out.append(pkgname); 710 out.append(":"); 711 out.append(typename); 712 out.append("/"); 713 out.append(entryname); 714 } catch (Resources.NotFoundException e) { 715 } 716 } 717 } 718 out.append("}"); 719 return out.toString(); 720 } 721 722 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 723 writer.print(prefix); 724 if (view == null) { 725 writer.println("null"); 726 return; 727 } 728 writer.println(viewToString(view)); 729 if (!(view instanceof ViewGroup)) { 730 return; 731 } 732 ViewGroup grp = (ViewGroup)view; 733 final int N = grp.getChildCount(); 734 if (N <= 0) { 735 return; 736 } 737 prefix = prefix + " "; 738 for (int i=0; i<N; i++) { 739 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 740 } 741 } 742 743 void doReallyStop(boolean retaining) { 744 if (!mReallyStopped) { 745 mReallyStopped = true; 746 mRetaining = retaining; 747 mHandler.removeMessages(MSG_REALLY_STOPPED); 748 onReallyStop(); 749 } 750 } 751 752 /** 753 * Pre-HC, we didn't have a way to determine whether an activity was 754 * being stopped for a config change or not until we saw 755 * onRetainNonConfigurationInstance() called after onStop(). However 756 * we need to know this, to know whether to retain fragments. This will 757 * tell us what we need to know. 758 */ 759 void onReallyStop() { 760 if (mLoadersStarted) { 761 mLoadersStarted = false; 762 if (mLoaderManager != null) { 763 if (!mRetaining) { 764 mLoaderManager.doStop(); 765 } else { 766 mLoaderManager.doRetain(); 767 } 768 } 769 } 770 771 mFragments.dispatchReallyStop(); 772 } 773 774 // ------------------------------------------------------------------------ 775 // FRAGMENT SUPPORT 776 // ------------------------------------------------------------------------ 777 778 /** 779 * Called when a fragment is attached to the activity. 780 */ 781 public void onAttachFragment(Fragment fragment) { 782 } 783 784 /** 785 * Return the FragmentManager for interacting with fragments associated 786 * with this activity. 787 */ 788 public FragmentManager getSupportFragmentManager() { 789 return mFragments; 790 } 791 792 /** 793 * Modifies the standard behavior to allow results to be delivered to fragments. 794 * This imposes a restriction that requestCode be <= 0xffff. 795 */ 796 @Override 797 public void startActivityForResult(Intent intent, int requestCode) { 798 if (requestCode != -1 && (requestCode&0xffff0000) != 0) { 799 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 800 } 801 super.startActivityForResult(intent, requestCode); 802 } 803 804 /** 805 * Called by Fragment.startActivityForResult() to implement its behavior. 806 */ 807 public void startActivityFromFragment(Fragment fragment, Intent intent, 808 int requestCode) { 809 if (requestCode == -1) { 810 super.startActivityForResult(intent, -1); 811 return; 812 } 813 if ((requestCode&0xffff0000) != 0) { 814 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 815 } 816 super.startActivityForResult(intent, ((fragment.mIndex+1)<<16) + (requestCode&0xffff)); 817 } 818 819 void invalidateSupportFragment(String who) { 820 //Log.v(TAG, "invalidateSupportFragment: who=" + who); 821 if (mAllLoaderManagers != null) { 822 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 823 if (lm != null && !lm.mRetaining) { 824 lm.doDestroy(); 825 mAllLoaderManagers.remove(who); 826 } 827 } 828 } 829 830 // ------------------------------------------------------------------------ 831 // LOADER SUPPORT 832 // ------------------------------------------------------------------------ 833 834 /** 835 * Return the LoaderManager for this fragment, creating it if needed. 836 */ 837 public LoaderManager getSupportLoaderManager() { 838 if (mLoaderManager != null) { 839 return mLoaderManager; 840 } 841 mCheckedForLoaderManager = true; 842 mLoaderManager = getLoaderManager(null, mLoadersStarted, true); 843 return mLoaderManager; 844 } 845 846 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 847 if (mAllLoaderManagers == null) { 848 mAllLoaderManagers = new HashMap<String, LoaderManagerImpl>(); 849 } 850 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 851 if (lm == null) { 852 if (create) { 853 lm = new LoaderManagerImpl(who, this, started); 854 mAllLoaderManagers.put(who, lm); 855 } 856 } else { 857 lm.updateActivity(this); 858 } 859 return lm; 860 } 861} 862