FragmentActivity.java revision 9dcd2e58138ca4eb4b18f80b50e8979329e859d6
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.util.AttributeSet; 30import android.util.Log; 31import android.view.KeyEvent; 32import android.view.Menu; 33import android.view.MenuItem; 34import android.view.View; 35import android.view.ViewGroup; 36import android.view.Window; 37 38import java.io.FileDescriptor; 39import java.io.PrintWriter; 40import java.util.ArrayList; 41import java.util.HashMap; 42 43/** 44 * Base class for activities that want to use the support-based 45 * {@link android.support.v4.app.Fragment} and 46 * {@link android.support.v4.content.Loader} APIs. 47 * 48 * <p>When using this class as opposed to new platform's built-in fragment 49 * and loader support, you must use the {@link #getSupportFragmentManager()} 50 * and {@link #getSupportLoaderManager()} methods respectively to access 51 * those features. 52 * 53 * <p class="note"><strong>Note:</strong> If you want to implement an activity that includes 54 * an <a href="{@docRoot}guide/topics/ui/actionbar.html">action bar</a>, you should instead use 55 * the {@link android.support.v7.app.ActionBarActivity} class, which is a subclass of this one, 56 * so allows you to use {@link android.support.v4.app.Fragment} APIs on API level 7 and higher.</p> 57 * 58 * <p>Known limitations:</p> 59 * <ul> 60 * <li> <p>When using the <code><fragment></code> tag, this implementation can not 61 * use the parent view's ID as the new fragment's ID. You must explicitly 62 * specify an ID (or tag) in the <code><fragment></code>.</p> 63 * <li> <p>Prior to Honeycomb (3.0), an activity's state was saved before pausing. 64 * Fragments are a significant amount of new state, and dynamic enough that one 65 * often wants them to change between pausing and stopping. These classes 66 * throw an exception if you try to change the fragment state after it has been 67 * saved, to avoid accidental loss of UI state. However this is too restrictive 68 * prior to Honeycomb, where the state is saved before pausing. To address this, 69 * when running on platforms prior to Honeycomb an exception will not be thrown 70 * if you change fragments between the state save and the activity being stopped. 71 * This means that in some cases if the activity is restored from its last saved 72 * state, this may be a snapshot slightly before what the user last saw.</p> 73 * </ul> 74 */ 75public class FragmentActivity extends Activity { 76 private static final String TAG = "FragmentActivity"; 77 78 static final String FRAGMENTS_TAG = "android:support:fragments"; 79 80 // This is the SDK API version of Honeycomb (3.0). 81 private static final int HONEYCOMB = 11; 82 83 static final int MSG_REALLY_STOPPED = 1; 84 static final int MSG_RESUME_PENDING = 2; 85 86 final Handler mHandler = new Handler() { 87 @Override 88 public void handleMessage(Message msg) { 89 switch (msg.what) { 90 case MSG_REALLY_STOPPED: 91 if (mStopped) { 92 doReallyStop(false); 93 } 94 break; 95 case MSG_RESUME_PENDING: 96 onResumeFragments(); 97 mFragments.execPendingActions(); 98 break; 99 default: 100 super.handleMessage(msg); 101 } 102 } 103 104 }; 105 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 106 final FragmentContainer mContainer = new FragmentContainer() { 107 @Override 108 public View findViewById(int id) { 109 return FragmentActivity.this.findViewById(id); 110 } 111 }; 112 113 boolean mCreated; 114 boolean mResumed; 115 boolean mStopped; 116 boolean mReallyStopped; 117 boolean mRetaining; 118 119 boolean mOptionsMenuInvalidated; 120 121 boolean mCheckedForLoaderManager; 122 boolean mLoadersStarted; 123 HashMap<String, LoaderManagerImpl> mAllLoaderManagers; 124 LoaderManagerImpl mLoaderManager; 125 126 static final class NonConfigurationInstances { 127 Object activity; 128 Object custom; 129 HashMap<String, Object> children; 130 ArrayList<Fragment> fragments; 131 HashMap<String, LoaderManagerImpl> loaders; 132 } 133 134 static class FragmentTag { 135 public static final int[] Fragment = { 136 0x01010003, 0x010100d0, 0x010100d1 137 }; 138 public static final int Fragment_id = 1; 139 public static final int Fragment_name = 0; 140 public static final int Fragment_tag = 2; 141 } 142 143 // ------------------------------------------------------------------------ 144 // HOOKS INTO ACTIVITY 145 // ------------------------------------------------------------------------ 146 147 /** 148 * Dispatch incoming result to the correct fragment. 149 */ 150 @Override 151 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 152 mFragments.noteStateNotSaved(); 153 int index = requestCode>>16; 154 if (index != 0) { 155 index--; 156 if (mFragments.mActive == null || index < 0 || index >= mFragments.mActive.size()) { 157 Log.w(TAG, "Activity result fragment index out of range: 0x" 158 + Integer.toHexString(requestCode)); 159 return; 160 } 161 Fragment frag = mFragments.mActive.get(index); 162 if (frag == null) { 163 Log.w(TAG, "Activity result no fragment exists for index: 0x" 164 + Integer.toHexString(requestCode)); 165 } else { 166 frag.onActivityResult(requestCode&0xffff, resultCode, data); 167 } 168 return; 169 } 170 171 super.onActivityResult(requestCode, resultCode, data); 172 } 173 174 /** 175 * Take care of popping the fragment back stack or finishing the activity 176 * as appropriate. 177 */ 178 public void onBackPressed() { 179 if (!mFragments.popBackStackImmediate()) { 180 finish(); 181 } 182 } 183 184 /** 185 * Dispatch configuration change to all fragments. 186 */ 187 @Override 188 public void onConfigurationChanged(Configuration newConfig) { 189 super.onConfigurationChanged(newConfig); 190 mFragments.dispatchConfigurationChanged(newConfig); 191 } 192 193 /** 194 * Perform initialization of all fragments and loaders. 195 */ 196 @Override 197 protected void onCreate(Bundle savedInstanceState) { 198 mFragments.attachActivity(this, mContainer, null); 199 // Old versions of the platform didn't do this! 200 if (getLayoutInflater().getFactory() == null) { 201 getLayoutInflater().setFactory(this); 202 } 203 204 super.onCreate(savedInstanceState); 205 206 NonConfigurationInstances nc = (NonConfigurationInstances) 207 getLastNonConfigurationInstance(); 208 if (nc != null) { 209 mAllLoaderManagers = nc.loaders; 210 } 211 if (savedInstanceState != null) { 212 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 213 mFragments.restoreAllState(p, nc != null ? nc.fragments : null); 214 } 215 mFragments.dispatchCreate(); 216 } 217 218 /** 219 * Dispatch to Fragment.onCreateOptionsMenu(). 220 */ 221 @Override 222 public boolean onCreatePanelMenu(int featureId, Menu menu) { 223 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 224 boolean show = super.onCreatePanelMenu(featureId, menu); 225 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 226 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 227 return show; 228 } 229 // Prior to Honeycomb, the framework can't invalidate the options 230 // menu, so we must always say we have one in case the app later 231 // invalidates it and needs to have it shown. 232 return true; 233 } 234 return super.onCreatePanelMenu(featureId, menu); 235 } 236 237 /** 238 * Add support for inflating the <fragment> tag. 239 */ 240 @Override 241 public View onCreateView(String name, Context context, AttributeSet attrs) { 242 if (!"fragment".equals(name)) { 243 return super.onCreateView(name, context, attrs); 244 } 245 246 String fname = attrs.getAttributeValue(null, "class"); 247 TypedArray a = context.obtainStyledAttributes(attrs, FragmentTag.Fragment); 248 if (fname == null) { 249 fname = a.getString(FragmentTag.Fragment_name); 250 } 251 int id = a.getResourceId(FragmentTag.Fragment_id, View.NO_ID); 252 String tag = a.getString(FragmentTag.Fragment_tag); 253 a.recycle(); 254 255 View parent = null; // NOTE: no way to get parent pre-Honeycomb. 256 int containerId = parent != null ? parent.getId() : 0; 257 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 258 throw new IllegalArgumentException(attrs.getPositionDescription() 259 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 260 } 261 262 // If we restored from a previous state, we may already have 263 // instantiated this fragment from the state and should use 264 // that instance instead of making a new one. 265 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 266 if (fragment == null && tag != null) { 267 fragment = mFragments.findFragmentByTag(tag); 268 } 269 if (fragment == null && containerId != View.NO_ID) { 270 fragment = mFragments.findFragmentById(containerId); 271 } 272 273 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 274 + Integer.toHexString(id) + " fname=" + fname 275 + " existing=" + fragment); 276 if (fragment == null) { 277 fragment = Fragment.instantiate(this, fname); 278 fragment.mFromLayout = true; 279 fragment.mFragmentId = id != 0 ? id : containerId; 280 fragment.mContainerId = containerId; 281 fragment.mTag = tag; 282 fragment.mInLayout = true; 283 fragment.mFragmentManager = mFragments; 284 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 285 mFragments.addFragment(fragment, true); 286 287 } else if (fragment.mInLayout) { 288 // A fragment already exists and it is not one we restored from 289 // previous state. 290 throw new IllegalArgumentException(attrs.getPositionDescription() 291 + ": Duplicate id 0x" + Integer.toHexString(id) 292 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 293 + " with another fragment for " + fname); 294 } else { 295 // This fragment was retained from a previous instance; get it 296 // going now. 297 fragment.mInLayout = true; 298 // If this fragment is newly instantiated (either right now, or 299 // from last saved state), then give it the attributes to 300 // initialize itself. 301 if (!fragment.mRetaining) { 302 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 303 } 304 mFragments.moveToState(fragment); 305 } 306 307 if (fragment.mView == null) { 308 throw new IllegalStateException("Fragment " + fname 309 + " did not create a view."); 310 } 311 if (id != 0) { 312 fragment.mView.setId(id); 313 } 314 if (fragment.mView.getTag() == null) { 315 fragment.mView.setTag(tag); 316 } 317 return fragment.mView; 318 } 319 320 /** 321 * Destroy all fragments and loaders. 322 */ 323 @Override 324 protected void onDestroy() { 325 super.onDestroy(); 326 327 doReallyStop(false); 328 329 mFragments.dispatchDestroy(); 330 if (mLoaderManager != null) { 331 mLoaderManager.doDestroy(); 332 } 333 } 334 335 /** 336 * Take care of calling onBackPressed() for pre-Eclair platforms. 337 */ 338 @Override 339 public boolean onKeyDown(int keyCode, KeyEvent event) { 340 if (android.os.Build.VERSION.SDK_INT < 5 /* ECLAIR */ 341 && keyCode == KeyEvent.KEYCODE_BACK 342 && event.getRepeatCount() == 0) { 343 // Take care of calling this method on earlier versions of 344 // the platform where it doesn't exist. 345 onBackPressed(); 346 return true; 347 } 348 349 return super.onKeyDown(keyCode, event); 350 } 351 352 /** 353 * Dispatch onLowMemory() to all fragments. 354 */ 355 @Override 356 public void onLowMemory() { 357 super.onLowMemory(); 358 mFragments.dispatchLowMemory(); 359 } 360 361 /** 362 * Dispatch context and options menu to fragments. 363 */ 364 @Override 365 public boolean onMenuItemSelected(int featureId, MenuItem item) { 366 if (super.onMenuItemSelected(featureId, item)) { 367 return true; 368 } 369 370 switch (featureId) { 371 case Window.FEATURE_OPTIONS_PANEL: 372 return mFragments.dispatchOptionsItemSelected(item); 373 374 case Window.FEATURE_CONTEXT_MENU: 375 return mFragments.dispatchContextItemSelected(item); 376 377 default: 378 return false; 379 } 380 } 381 382 /** 383 * Call onOptionsMenuClosed() on fragments. 384 */ 385 @Override 386 public void onPanelClosed(int featureId, Menu menu) { 387 switch (featureId) { 388 case Window.FEATURE_OPTIONS_PANEL: 389 mFragments.dispatchOptionsMenuClosed(menu); 390 break; 391 } 392 super.onPanelClosed(featureId, menu); 393 } 394 395 /** 396 * Dispatch onPause() to fragments. 397 */ 398 @Override 399 protected void onPause() { 400 super.onPause(); 401 mResumed = false; 402 if (mHandler.hasMessages(MSG_RESUME_PENDING)) { 403 mHandler.removeMessages(MSG_RESUME_PENDING); 404 onResumeFragments(); 405 } 406 mFragments.dispatchPause(); 407 } 408 409 /** 410 * Handle onNewIntent() to inform the fragment manager that the 411 * state is not saved. If you are handling new intents and may be 412 * making changes to the fragment state, you want to be sure to call 413 * through to the super-class here first. Otherwise, if your state 414 * is saved but the activity is not stopped, you could get an 415 * onNewIntent() call which happens before onResume() and trying to 416 * perform fragment operations at that point will throw IllegalStateException 417 * because the fragment manager thinks the state is still saved. 418 */ 419 @Override 420 protected void onNewIntent(Intent intent) { 421 super.onNewIntent(intent); 422 mFragments.noteStateNotSaved(); 423 } 424 425 /** 426 * Dispatch onResume() to fragments. Note that for better inter-operation 427 * with older versions of the platform, at the point of this call the 428 * fragments attached to the activity are <em>not</em> resumed. This means 429 * that in some cases the previous state may still be saved, not allowing 430 * fragment transactions that modify the state. To correctly interact 431 * with fragments in their proper state, you should instead override 432 * {@link #onResumeFragments()}. 433 */ 434 @Override 435 protected void onResume() { 436 super.onResume(); 437 mHandler.sendEmptyMessage(MSG_RESUME_PENDING); 438 mResumed = true; 439 mFragments.execPendingActions(); 440 } 441 442 /** 443 * Dispatch onResume() to fragments. 444 */ 445 @Override 446 protected void onPostResume() { 447 super.onPostResume(); 448 mHandler.removeMessages(MSG_RESUME_PENDING); 449 onResumeFragments(); 450 mFragments.execPendingActions(); 451 } 452 453 /** 454 * This is the fragment-orientated version of {@link #onResume()} that you 455 * can override to perform operations in the Activity at the same point 456 * where its fragments are resumed. Be sure to always call through to 457 * the super-class. 458 */ 459 protected void onResumeFragments() { 460 mFragments.dispatchResume(); 461 } 462 463 /** 464 * Dispatch onPrepareOptionsMenu() to fragments. 465 */ 466 @Override 467 public boolean onPreparePanel(int featureId, View view, Menu menu) { 468 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 469 if (mOptionsMenuInvalidated) { 470 mOptionsMenuInvalidated = false; 471 menu.clear(); 472 onCreatePanelMenu(featureId, menu); 473 } 474 boolean goforit = super.onPreparePanel(featureId, view, menu); 475 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 476 return goforit; 477 } 478 return super.onPreparePanel(featureId, view, menu); 479 } 480 481 /** 482 * Retain all appropriate fragment and loader state. You can NOT 483 * override this yourself! Use {@link #onRetainCustomNonConfigurationInstance()} 484 * if you want to retain your own state. 485 */ 486 @Override 487 public final Object onRetainNonConfigurationInstance() { 488 if (mStopped) { 489 doReallyStop(true); 490 } 491 492 Object custom = onRetainCustomNonConfigurationInstance(); 493 494 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 495 boolean retainLoaders = false; 496 if (mAllLoaderManagers != null) { 497 // prune out any loader managers that were already stopped and so 498 // have nothing useful to retain. 499 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 500 mAllLoaderManagers.values().toArray(loaders); 501 if (loaders != null) { 502 for (int i=0; i<loaders.length; i++) { 503 LoaderManagerImpl lm = loaders[i]; 504 if (lm.mRetaining) { 505 retainLoaders = true; 506 } else { 507 lm.doDestroy(); 508 mAllLoaderManagers.remove(lm.mWho); 509 } 510 } 511 } 512 } 513 if (fragments == null && !retainLoaders && custom == null) { 514 return null; 515 } 516 517 NonConfigurationInstances nci = new NonConfigurationInstances(); 518 nci.activity = null; 519 nci.custom = custom; 520 nci.children = null; 521 nci.fragments = fragments; 522 nci.loaders = mAllLoaderManagers; 523 return nci; 524 } 525 526 /** 527 * Save all appropriate fragment state. 528 */ 529 @Override 530 protected void onSaveInstanceState(Bundle outState) { 531 super.onSaveInstanceState(outState); 532 Parcelable p = mFragments.saveAllState(); 533 if (p != null) { 534 outState.putParcelable(FRAGMENTS_TAG, p); 535 } 536 } 537 538 /** 539 * Dispatch onStart() to all fragments. Ensure any created loaders are 540 * now started. 541 */ 542 @Override 543 protected void onStart() { 544 super.onStart(); 545 546 mStopped = false; 547 mReallyStopped = false; 548 mHandler.removeMessages(MSG_REALLY_STOPPED); 549 550 if (!mCreated) { 551 mCreated = true; 552 mFragments.dispatchActivityCreated(); 553 } 554 555 mFragments.noteStateNotSaved(); 556 mFragments.execPendingActions(); 557 558 if (!mLoadersStarted) { 559 mLoadersStarted = true; 560 if (mLoaderManager != null) { 561 mLoaderManager.doStart(); 562 } else if (!mCheckedForLoaderManager) { 563 mLoaderManager = getLoaderManager(null, mLoadersStarted, false); 564 // the returned loader manager may be a new one, so we have to start it 565 if ((mLoaderManager != null) && (!mLoaderManager.mStarted)) { 566 mLoaderManager.doStart(); 567 } 568 } 569 mCheckedForLoaderManager = true; 570 } 571 // NOTE: HC onStart goes here. 572 573 mFragments.dispatchStart(); 574 if (mAllLoaderManagers != null) { 575 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 576 mAllLoaderManagers.values().toArray(loaders); 577 if (loaders != null) { 578 for (int i=0; i<loaders.length; i++) { 579 LoaderManagerImpl lm = loaders[i]; 580 lm.finishRetain(); 581 lm.doReportStart(); 582 } 583 } 584 } 585 } 586 587 /** 588 * Dispatch onStop() to all fragments. Ensure all loaders are stopped. 589 */ 590 @Override 591 protected void onStop() { 592 super.onStop(); 593 594 mStopped = true; 595 mHandler.sendEmptyMessage(MSG_REALLY_STOPPED); 596 597 mFragments.dispatchStop(); 598 } 599 600 // ------------------------------------------------------------------------ 601 // NEW METHODS 602 // ------------------------------------------------------------------------ 603 604 /** 605 * Use this instead of {@link #onRetainNonConfigurationInstance()}. 606 * Retrieve later with {@link #getLastCustomNonConfigurationInstance()}. 607 */ 608 public Object onRetainCustomNonConfigurationInstance() { 609 return null; 610 } 611 612 /** 613 * Return the value previously returned from 614 * {@link #onRetainCustomNonConfigurationInstance()}. 615 */ 616 public Object getLastCustomNonConfigurationInstance() { 617 NonConfigurationInstances nc = (NonConfigurationInstances) 618 getLastNonConfigurationInstance(); 619 return nc != null ? nc.custom : null; 620 } 621 622 /** 623 * Support library version of {@link Activity#invalidateOptionsMenu}. 624 * 625 * <p>Invalidate the activity's options menu. This will cause relevant presentations 626 * of the menu to fully update via calls to onCreateOptionsMenu and 627 * onPrepareOptionsMenu the next time the menu is requested. 628 */ 629 public void supportInvalidateOptionsMenu() { 630 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 631 // If we are running on HC or greater, we can use the framework 632 // API to invalidate the options menu. 633 ActivityCompatHoneycomb.invalidateOptionsMenu(this); 634 return; 635 } 636 637 // Whoops, older platform... we'll use a hack, to manually rebuild 638 // the options menu the next time it is prepared. 639 mOptionsMenuInvalidated = true; 640 } 641 642 /** 643 * Print the Activity's state into the given stream. This gets invoked if 644 * you run "adb shell dumpsys activity <activity_component_name>". 645 * 646 * @param prefix Desired prefix to prepend at each line of output. 647 * @param fd The raw file descriptor that the dump is being sent to. 648 * @param writer The PrintWriter to which you should dump your state. This will be 649 * closed for you after you return. 650 * @param args additional arguments to the dump request. 651 */ 652 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 653 if (android.os.Build.VERSION.SDK_INT >= HONEYCOMB) { 654 // XXX This can only work if we can call the super-class impl. :/ 655 //ActivityCompatHoneycomb.dump(this, prefix, fd, writer, args); 656 } 657 writer.print(prefix); writer.print("Local FragmentActivity "); 658 writer.print(Integer.toHexString(System.identityHashCode(this))); 659 writer.println(" State:"); 660 String innerPrefix = prefix + " "; 661 writer.print(innerPrefix); writer.print("mCreated="); 662 writer.print(mCreated); writer.print("mResumed="); 663 writer.print(mResumed); writer.print(" mStopped="); 664 writer.print(mStopped); writer.print(" mReallyStopped="); 665 writer.println(mReallyStopped); 666 writer.print(innerPrefix); writer.print("mLoadersStarted="); 667 writer.println(mLoadersStarted); 668 if (mLoaderManager != null) { 669 writer.print(prefix); writer.print("Loader Manager "); 670 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 671 writer.println(":"); 672 mLoaderManager.dump(prefix + " ", fd, writer, args); 673 } 674 mFragments.dump(prefix, fd, writer, args); 675 writer.print(prefix); writer.println("View Hierarchy:"); 676 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 677 } 678 679 private static String viewToString(View view) { 680 StringBuilder out = new StringBuilder(128); 681 out.append(view.getClass().getName()); 682 out.append('{'); 683 out.append(Integer.toHexString(System.identityHashCode(view))); 684 out.append(' '); 685 switch (view.getVisibility()) { 686 case View.VISIBLE: out.append('V'); break; 687 case View.INVISIBLE: out.append('I'); break; 688 case View.GONE: out.append('G'); break; 689 default: out.append('.'); break; 690 } 691 out.append(view.isFocusable() ? 'F' : '.'); 692 out.append(view.isEnabled() ? 'E' : '.'); 693 out.append(view.willNotDraw() ? '.' : 'D'); 694 out.append(view.isHorizontalScrollBarEnabled()? 'H' : '.'); 695 out.append(view.isVerticalScrollBarEnabled() ? 'V' : '.'); 696 out.append(view.isClickable() ? 'C' : '.'); 697 out.append(view.isLongClickable() ? 'L' : '.'); 698 out.append(' '); 699 out.append(view.isFocused() ? 'F' : '.'); 700 out.append(view.isSelected() ? 'S' : '.'); 701 out.append(view.isPressed() ? 'P' : '.'); 702 out.append(' '); 703 out.append(view.getLeft()); 704 out.append(','); 705 out.append(view.getTop()); 706 out.append('-'); 707 out.append(view.getRight()); 708 out.append(','); 709 out.append(view.getBottom()); 710 final int id = view.getId(); 711 if (id != View.NO_ID) { 712 out.append(" #"); 713 out.append(Integer.toHexString(id)); 714 final Resources r = view.getResources(); 715 if (id != 0 && r != null) { 716 try { 717 String pkgname; 718 switch (id&0xff000000) { 719 case 0x7f000000: 720 pkgname="app"; 721 break; 722 case 0x01000000: 723 pkgname="android"; 724 break; 725 default: 726 pkgname = r.getResourcePackageName(id); 727 break; 728 } 729 String typename = r.getResourceTypeName(id); 730 String entryname = r.getResourceEntryName(id); 731 out.append(" "); 732 out.append(pkgname); 733 out.append(":"); 734 out.append(typename); 735 out.append("/"); 736 out.append(entryname); 737 } catch (Resources.NotFoundException e) { 738 } 739 } 740 } 741 out.append("}"); 742 return out.toString(); 743 } 744 745 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 746 writer.print(prefix); 747 if (view == null) { 748 writer.println("null"); 749 return; 750 } 751 writer.println(viewToString(view)); 752 if (!(view instanceof ViewGroup)) { 753 return; 754 } 755 ViewGroup grp = (ViewGroup)view; 756 final int N = grp.getChildCount(); 757 if (N <= 0) { 758 return; 759 } 760 prefix = prefix + " "; 761 for (int i=0; i<N; i++) { 762 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 763 } 764 } 765 766 void doReallyStop(boolean retaining) { 767 if (!mReallyStopped) { 768 mReallyStopped = true; 769 mRetaining = retaining; 770 mHandler.removeMessages(MSG_REALLY_STOPPED); 771 onReallyStop(); 772 } 773 } 774 775 /** 776 * Pre-HC, we didn't have a way to determine whether an activity was 777 * being stopped for a config change or not until we saw 778 * onRetainNonConfigurationInstance() called after onStop(). However 779 * we need to know this, to know whether to retain fragments. This will 780 * tell us what we need to know. 781 */ 782 void onReallyStop() { 783 if (mLoadersStarted) { 784 mLoadersStarted = false; 785 if (mLoaderManager != null) { 786 if (!mRetaining) { 787 mLoaderManager.doStop(); 788 } else { 789 mLoaderManager.doRetain(); 790 } 791 } 792 } 793 794 mFragments.dispatchReallyStop(); 795 } 796 797 // ------------------------------------------------------------------------ 798 // FRAGMENT SUPPORT 799 // ------------------------------------------------------------------------ 800 801 /** 802 * Called when a fragment is attached to the activity. 803 */ 804 public void onAttachFragment(Fragment fragment) { 805 } 806 807 /** 808 * Return the FragmentManager for interacting with fragments associated 809 * with this activity. 810 */ 811 public FragmentManager getSupportFragmentManager() { 812 return mFragments; 813 } 814 815 /** 816 * Modifies the standard behavior to allow results to be delivered to fragments. 817 * This imposes a restriction that requestCode be <= 0xffff. 818 */ 819 @Override 820 public void startActivityForResult(Intent intent, int requestCode) { 821 if (requestCode != -1 && (requestCode&0xffff0000) != 0) { 822 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 823 } 824 super.startActivityForResult(intent, requestCode); 825 } 826 827 /** 828 * Called by Fragment.startActivityForResult() to implement its behavior. 829 */ 830 public void startActivityFromFragment(Fragment fragment, Intent intent, 831 int requestCode) { 832 if (requestCode == -1) { 833 super.startActivityForResult(intent, -1); 834 return; 835 } 836 if ((requestCode&0xffff0000) != 0) { 837 throw new IllegalArgumentException("Can only use lower 16 bits for requestCode"); 838 } 839 super.startActivityForResult(intent, ((fragment.mIndex+1)<<16) + (requestCode&0xffff)); 840 } 841 842 void invalidateSupportFragment(String who) { 843 //Log.v(TAG, "invalidateSupportFragment: who=" + who); 844 if (mAllLoaderManagers != null) { 845 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 846 if (lm != null && !lm.mRetaining) { 847 lm.doDestroy(); 848 mAllLoaderManagers.remove(who); 849 } 850 } 851 } 852 853 // ------------------------------------------------------------------------ 854 // LOADER SUPPORT 855 // ------------------------------------------------------------------------ 856 857 /** 858 * Return the LoaderManager for this fragment, creating it if needed. 859 */ 860 public LoaderManager getSupportLoaderManager() { 861 if (mLoaderManager != null) { 862 return mLoaderManager; 863 } 864 mCheckedForLoaderManager = true; 865 mLoaderManager = getLoaderManager(null, mLoadersStarted, true); 866 return mLoaderManager; 867 } 868 869 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 870 if (mAllLoaderManagers == null) { 871 mAllLoaderManagers = new HashMap<String, LoaderManagerImpl>(); 872 } 873 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 874 if (lm == null) { 875 if (create) { 876 lm = new LoaderManagerImpl(who, this, started); 877 mAllLoaderManagers.put(who, lm); 878 } 879 } else { 880 lm.updateActivity(this); 881 } 882 return lm; 883 } 884} 885