ActivityStack.java revision 9bcc6e83d98dc5608d15f38c12d397be650c637c
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.am; 18 19import static com.android.server.am.ActivityManagerService.TAG; 20import static com.android.server.am.ActivityManagerService.localLOGV; 21import static com.android.server.am.ActivityManagerService.DEBUG_CLEANUP; 22import static com.android.server.am.ActivityManagerService.DEBUG_CONFIGURATION; 23import static com.android.server.am.ActivityManagerService.DEBUG_PAUSE; 24import static com.android.server.am.ActivityManagerService.DEBUG_RESULTS; 25import static com.android.server.am.ActivityManagerService.DEBUG_STACK; 26import static com.android.server.am.ActivityManagerService.DEBUG_SWITCH; 27import static com.android.server.am.ActivityManagerService.DEBUG_TASKS; 28import static com.android.server.am.ActivityManagerService.DEBUG_TRANSITION; 29import static com.android.server.am.ActivityManagerService.DEBUG_USER_LEAVING; 30import static com.android.server.am.ActivityManagerService.DEBUG_VISBILITY; 31import static com.android.server.am.ActivityManagerService.VALIDATE_TOKENS; 32 33import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 34import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 35 36import static com.android.server.am.ActivityStackSupervisor.DEBUG_ADD_REMOVE; 37import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP; 38import static com.android.server.am.ActivityStackSupervisor.DEBUG_CONTAINERS; 39import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 40import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS; 41import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 42import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 43 44import com.android.internal.app.IVoiceInteractor; 45import com.android.internal.os.BatteryStatsImpl; 46import com.android.server.Watchdog; 47import com.android.server.am.ActivityManagerService.ItemMatcher; 48import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 49import com.android.server.am.ActivityStackSupervisor.ActivityDisplay; 50import com.android.server.wm.AppTransition; 51import com.android.server.wm.TaskGroup; 52import com.android.server.wm.WindowManagerService; 53 54import android.app.Activity; 55import android.app.ActivityManager; 56import android.app.ActivityOptions; 57import android.app.AppGlobals; 58import android.app.IActivityController; 59import android.app.ResultInfo; 60import android.app.ActivityManager.RunningTaskInfo; 61import android.content.ComponentName; 62import android.content.Intent; 63import android.content.pm.ActivityInfo; 64import android.content.pm.PackageManager; 65import android.content.res.Configuration; 66import android.content.res.Resources; 67import android.graphics.Bitmap; 68import android.net.Uri; 69import android.os.Binder; 70import android.os.Bundle; 71import android.os.Debug; 72import android.os.Handler; 73import android.os.IBinder; 74import android.os.Looper; 75import android.os.Message; 76import android.os.PersistableBundle; 77import android.os.RemoteException; 78import android.os.SystemClock; 79import android.os.Trace; 80import android.os.UserHandle; 81import android.service.voice.IVoiceInteractionSession; 82import android.util.EventLog; 83import android.util.Slog; 84import android.view.Display; 85 86import java.io.FileDescriptor; 87import java.io.PrintWriter; 88import java.lang.ref.WeakReference; 89import java.util.ArrayList; 90import java.util.Iterator; 91import java.util.List; 92import java.util.Objects; 93 94/** 95 * State and management of a single stack of activities. 96 */ 97final class ActivityStack { 98 99 // Ticks during which we check progress while waiting for an app to launch. 100 static final int LAUNCH_TICK = 500; 101 102 // How long we wait until giving up on the last activity to pause. This 103 // is short because it directly impacts the responsiveness of starting the 104 // next activity. 105 static final int PAUSE_TIMEOUT = 500; 106 107 // How long we wait for the activity to tell us it has stopped before 108 // giving up. This is a good amount of time because we really need this 109 // from the application in order to get its saved state. 110 static final int STOP_TIMEOUT = 10*1000; 111 112 // How long we wait until giving up on an activity telling us it has 113 // finished destroying itself. 114 static final int DESTROY_TIMEOUT = 10*1000; 115 116 // How long until we reset a task when the user returns to it. Currently 117 // disabled. 118 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 119 120 // How long between activity launches that we consider safe to not warn 121 // the user about an unexpected activity being launched on top. 122 static final long START_WARN_TIME = 5*1000; 123 124 // Set to false to disable the preview that is shown while a new activity 125 // is being started. 126 static final boolean SHOW_APP_STARTING_PREVIEW = true; 127 128 // How long to wait for all background Activities to redraw following a call to 129 // convertToTranslucent(). 130 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 131 132 static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic(); 133 134 enum ActivityState { 135 INITIALIZING, 136 RESUMED, 137 PAUSING, 138 PAUSED, 139 STOPPING, 140 STOPPED, 141 FINISHING, 142 DESTROYING, 143 DESTROYED 144 } 145 146 final ActivityManagerService mService; 147 final WindowManagerService mWindowManager; 148 149 /** 150 * The back history of all previous (and possibly still 151 * running) activities. It contains #TaskRecord objects. 152 */ 153 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 154 155 /** 156 * Used for validating app tokens with window manager. 157 */ 158 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 159 160 /** 161 * List of running activities, sorted by recent usage. 162 * The first entry in the list is the least recently used. 163 * It contains HistoryRecord objects. 164 */ 165 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 166 167 /** 168 * Animations that for the current transition have requested not to 169 * be considered for the transition animation. 170 */ 171 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 172 173 /** 174 * When we are in the process of pausing an activity, before starting the 175 * next one, this variable holds the activity that is currently being paused. 176 */ 177 ActivityRecord mPausingActivity = null; 178 179 /** 180 * This is the last activity that we put into the paused state. This is 181 * used to determine if we need to do an activity transition while sleeping, 182 * when we normally hold the top activity paused. 183 */ 184 ActivityRecord mLastPausedActivity = null; 185 186 /** 187 * Activities that specify No History must be removed once the user navigates away from them. 188 * If the device goes to sleep with such an activity in the paused state then we save it here 189 * and finish it later if another activity replaces it on wakeup. 190 */ 191 ActivityRecord mLastNoHistoryActivity = null; 192 193 /** 194 * Current activity that is resumed, or null if there is none. 195 */ 196 ActivityRecord mResumedActivity = null; 197 198 /** 199 * This is the last activity that has been started. It is only used to 200 * identify when multiple activities are started at once so that the user 201 * can be warned they may not be in the activity they think they are. 202 */ 203 ActivityRecord mLastStartedActivity = null; 204 205 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 206 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 207 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 208 // Activity in mTranslucentActivityWaiting is notified via 209 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 210 // background activity being drawn then the same call will be made with a true value. 211 ActivityRecord mTranslucentActivityWaiting = null; 212 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 213 new ArrayList<ActivityRecord>(); 214 215 /** 216 * Set when we know we are going to be calling updateConfiguration() 217 * soon, so want to skip intermediate config checks. 218 */ 219 boolean mConfigWillChange; 220 221 long mLaunchStartTime = 0; 222 long mFullyDrawnStartTime = 0; 223 224 /** 225 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 226 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 227 */ 228 private ActivityRecord mLastScreenshotActivity = null; 229 private Bitmap mLastScreenshotBitmap = null; 230 231 int mThumbnailWidth = -1; 232 int mThumbnailHeight = -1; 233 234 int mCurrentUser; 235 236 final int mStackId; 237 final ActivityContainer mActivityContainer; 238 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 239 ArrayList<ActivityStack> mStacks; 240 /** The attached Display's unique identifier, or -1 if detached */ 241 int mDisplayId; 242 243 /** Run all ActivityStacks through this */ 244 final ActivityStackSupervisor mStackSupervisor; 245 246 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 247 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 248 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 249 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 250 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 251 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 252 static final int STOP_MEDIA_PLAYING_TIMEOUT_MSG = 253 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 254 255 static class ScheduleDestroyArgs { 256 final ProcessRecord mOwner; 257 final String mReason; 258 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 259 mOwner = owner; 260 mReason = reason; 261 } 262 } 263 264 final Handler mHandler; 265 266 final class ActivityStackHandler extends Handler { 267 //public Handler() { 268 // if (localLOGV) Slog.v(TAG, "Handler started!"); 269 //} 270 ActivityStackHandler(Looper looper) { 271 super(looper); 272 } 273 274 @Override 275 public void handleMessage(Message msg) { 276 switch (msg.what) { 277 case PAUSE_TIMEOUT_MSG: { 278 ActivityRecord r = (ActivityRecord)msg.obj; 279 // We don't at this point know if the activity is fullscreen, 280 // so we need to be conservative and assume it isn't. 281 Slog.w(TAG, "Activity pause timeout for " + r); 282 synchronized (mService) { 283 if (r.app != null) { 284 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 285 } 286 activityPausedLocked(r.appToken, true, r.persistentState); 287 } 288 } break; 289 case LAUNCH_TICK_MSG: { 290 ActivityRecord r = (ActivityRecord)msg.obj; 291 synchronized (mService) { 292 if (r.continueLaunchTickingLocked()) { 293 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 294 } 295 } 296 } break; 297 case DESTROY_TIMEOUT_MSG: { 298 ActivityRecord r = (ActivityRecord)msg.obj; 299 // We don't at this point know if the activity is fullscreen, 300 // so we need to be conservative and assume it isn't. 301 Slog.w(TAG, "Activity destroy timeout for " + r); 302 synchronized (mService) { 303 activityDestroyedLocked(r != null ? r.appToken : null); 304 } 305 } break; 306 case STOP_TIMEOUT_MSG: { 307 ActivityRecord r = (ActivityRecord)msg.obj; 308 // We don't at this point know if the activity is fullscreen, 309 // so we need to be conservative and assume it isn't. 310 Slog.w(TAG, "Activity stop timeout for " + r); 311 synchronized (mService) { 312 if (r.isInHistory()) { 313 activityStoppedLocked(r, null, null, null); 314 } 315 } 316 } break; 317 case DESTROY_ACTIVITIES_MSG: { 318 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 319 synchronized (mService) { 320 destroyActivitiesLocked(args.mOwner, args.mReason); 321 } 322 } break; 323 case TRANSLUCENT_TIMEOUT_MSG: { 324 synchronized (mService) { 325 notifyActivityDrawnLocked(null); 326 } 327 } break; 328 case STOP_MEDIA_PLAYING_TIMEOUT_MSG: { 329 synchronized (mService) { 330 final ActivityRecord r = getMediaPlayer(); 331 Slog.e(TAG, "Timeout waiting for stopMediaPlaying player=" + r); 332 if (r != null) { 333 mService.killAppAtUsersRequest(r.app, null); 334 } 335 } 336 } break; 337 } 338 } 339 } 340 341 int numActivities() { 342 int count = 0; 343 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 344 count += mTaskHistory.get(taskNdx).mActivities.size(); 345 } 346 return count; 347 } 348 349 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 350 mActivityContainer = activityContainer; 351 mStackSupervisor = activityContainer.getOuter(); 352 mService = mStackSupervisor.mService; 353 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 354 mWindowManager = mService.mWindowManager; 355 mStackId = activityContainer.mStackId; 356 mCurrentUser = mService.mCurrentUserId; 357 // Get the activity screenshot thumbnail dimensions 358 Resources res = mService.mContext.getResources(); 359 mThumbnailWidth = res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_width); 360 mThumbnailHeight = res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_height); 361 } 362 363 /** 364 * Checks whether the userid is a profile of the current user. 365 */ 366 private boolean isCurrentProfileLocked(int userId) { 367 if (userId == mCurrentUser) return true; 368 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 369 if (mService.mCurrentProfileIds[i] == userId) return true; 370 } 371 return false; 372 } 373 374 boolean okToShowLocked(ActivityRecord r) { 375 return isCurrentProfileLocked(r.userId) 376 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 377 } 378 379 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 380 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 381 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 382 if (r != null) { 383 return r; 384 } 385 } 386 return null; 387 } 388 389 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 390 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 391 final TaskRecord task = mTaskHistory.get(taskNdx); 392 final ArrayList<ActivityRecord> activities = task.mActivities; 393 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 394 ActivityRecord r = activities.get(activityNdx); 395 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 396 return r; 397 } 398 } 399 } 400 return null; 401 } 402 403 /** 404 * This is a simplified version of topRunningActivityLocked that provides a number of 405 * optional skip-over modes. It is intended for use with the ActivityController hook only. 406 * 407 * @param token If non-null, any history records matching this token will be skipped. 408 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 409 * 410 * @return Returns the HistoryRecord of the next activity on the stack. 411 */ 412 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 413 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 414 TaskRecord task = mTaskHistory.get(taskNdx); 415 if (task.taskId == taskId) { 416 continue; 417 } 418 ArrayList<ActivityRecord> activities = task.mActivities; 419 for (int i = activities.size() - 1; i >= 0; --i) { 420 final ActivityRecord r = activities.get(i); 421 // Note: the taskId check depends on real taskId fields being non-zero 422 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 423 return r; 424 } 425 } 426 } 427 return null; 428 } 429 430 final ActivityRecord topActivity() { 431 // Iterate to find the first non-empty task stack. Note that this code can 432 // be simplified once we stop storing tasks with empty mActivities lists. 433 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 434 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 435 final int topActivityNdx = activities.size() - 1; 436 if (topActivityNdx >= 0) { 437 return activities.get(topActivityNdx); 438 } 439 } 440 return null; 441 } 442 443 final TaskRecord topTask() { 444 final int size = mTaskHistory.size(); 445 if (size > 0) { 446 return mTaskHistory.get(size - 1); 447 } 448 return null; 449 } 450 451 TaskRecord taskForIdLocked(int id) { 452 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 453 final TaskRecord task = mTaskHistory.get(taskNdx); 454 if (task.taskId == id) { 455 return task; 456 } 457 } 458 return null; 459 } 460 461 ActivityRecord isInStackLocked(IBinder token) { 462 final ActivityRecord r = ActivityRecord.forToken(token); 463 if (r != null) { 464 final TaskRecord task = r.task; 465 if (task.mActivities.contains(r) && mTaskHistory.contains(task)) { 466 if (task.stack != this) Slog.w(TAG, 467 "Illegal state! task does not point to stack it is in."); 468 return r; 469 } 470 } 471 return null; 472 } 473 474 final boolean updateLRUListLocked(ActivityRecord r) { 475 final boolean hadit = mLRUActivities.remove(r); 476 mLRUActivities.add(r); 477 return hadit; 478 } 479 480 final boolean isHomeStack() { 481 return mStackId == HOME_STACK_ID; 482 } 483 484 final boolean isOnHomeDisplay() { 485 return isAttached() && 486 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 487 } 488 489 final void moveToFront() { 490 if (isAttached()) { 491 if (isOnHomeDisplay()) { 492 mStackSupervisor.moveHomeStack(isHomeStack()); 493 } 494 mStacks.remove(this); 495 mStacks.add(this); 496 } 497 } 498 499 final boolean isAttached() { 500 return mStacks != null; 501 } 502 503 /** 504 * Returns the top activity in any existing task matching the given 505 * Intent. Returns null if no such task is found. 506 */ 507 ActivityRecord findTaskLocked(ActivityRecord target) { 508 Intent intent = target.intent; 509 ActivityInfo info = target.info; 510 ComponentName cls = intent.getComponent(); 511 if (info.targetActivity != null) { 512 cls = new ComponentName(info.packageName, info.targetActivity); 513 } 514 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 515 boolean isDocument = intent != null & intent.isDocument(); 516 // If documentData is non-null then it must match the existing task data. 517 Uri documentData = isDocument ? intent.getData() : null; 518 519 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 520 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 521 final TaskRecord task = mTaskHistory.get(taskNdx); 522 if (task.voiceSession != null) { 523 // We never match voice sessions; those always run independently. 524 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 525 continue; 526 } 527 if (task.userId != userId) { 528 // Looking for a different task. 529 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 530 continue; 531 } 532 final ActivityRecord r = task.getTopActivity(); 533 if (r == null || r.finishing || r.userId != userId || 534 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 535 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 536 continue; 537 } 538 539 final Intent taskIntent = task.intent; 540 final Intent affinityIntent = task.affinityIntent; 541 final boolean taskIsDocument; 542 final Uri taskDocumentData; 543 if (taskIntent != null && taskIntent.isDocument()) { 544 taskIsDocument = true; 545 taskDocumentData = taskIntent.getData(); 546 } else if (affinityIntent != null && affinityIntent.isDocument()) { 547 taskIsDocument = true; 548 taskDocumentData = affinityIntent.getData(); 549 } else { 550 taskIsDocument = false; 551 taskDocumentData = null; 552 } 553 554 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 555 + taskIntent.getComponent().flattenToShortString() 556 + "/aff=" + r.task.affinity + " to new cls=" 557 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 558 if (!isDocument && !taskIsDocument && task.affinity != null) { 559 if (task.affinity.equals(target.taskAffinity)) { 560 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 561 return r; 562 } 563 } else if (taskIntent != null && taskIntent.getComponent() != null && 564 taskIntent.getComponent().compareTo(cls) == 0 && 565 Objects.equals(documentData, taskDocumentData)) { 566 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 567 //dump(); 568 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 569 + r.intent); 570 return r; 571 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 572 affinityIntent.getComponent().compareTo(cls) == 0 && 573 Objects.equals(documentData, taskDocumentData)) { 574 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 575 //dump(); 576 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 577 + r.intent); 578 return r; 579 } else if (DEBUG_TASKS) { 580 Slog.d(TAG, "Not a match: " + task); 581 } 582 } 583 584 return null; 585 } 586 587 /** 588 * Returns the first activity (starting from the top of the stack) that 589 * is the same as the given activity. Returns null if no such activity 590 * is found. 591 */ 592 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 593 ComponentName cls = intent.getComponent(); 594 if (info.targetActivity != null) { 595 cls = new ComponentName(info.packageName, info.targetActivity); 596 } 597 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 598 599 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 600 TaskRecord task = mTaskHistory.get(taskNdx); 601 if (!isCurrentProfileLocked(task.userId)) { 602 return null; 603 } 604 final ArrayList<ActivityRecord> activities = task.mActivities; 605 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 606 ActivityRecord r = activities.get(activityNdx); 607 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 608 //Slog.i(TAG, "Found matching class!"); 609 //dump(); 610 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 611 return r; 612 } 613 } 614 } 615 616 return null; 617 } 618 619 /* 620 * Move the activities around in the stack to bring a user to the foreground. 621 */ 622 final void switchUserLocked(int userId) { 623 if (mCurrentUser == userId) { 624 return; 625 } 626 mCurrentUser = userId; 627 628 // Move userId's tasks to the top. 629 int index = mTaskHistory.size(); 630 for (int i = 0; i < index; ) { 631 TaskRecord task = mTaskHistory.get(i); 632 if (isCurrentProfileLocked(task.userId)) { 633 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 634 " moving " + task + " to top"); 635 mTaskHistory.remove(i); 636 mTaskHistory.add(task); 637 --index; 638 // Use same value for i. 639 } else { 640 ++i; 641 } 642 } 643 if (VALIDATE_TOKENS) { 644 validateAppTokensLocked(); 645 } 646 } 647 648 void minimalResumeActivityLocked(ActivityRecord r) { 649 r.state = ActivityState.RESUMED; 650 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 651 + " (starting new instance)"); 652 r.stopped = false; 653 mResumedActivity = r; 654 r.task.touchActiveTime(); 655 mService.addRecentTaskLocked(r.task); 656 completeResumeLocked(r); 657 mStackSupervisor.checkReadyForSleepLocked(); 658 setLaunchTime(r); 659 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 660 } 661 662 private void startLaunchTraces() { 663 if (mFullyDrawnStartTime != 0) { 664 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 665 } 666 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 667 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 668 } 669 670 private void stopFullyDrawnTraceIfNeeded() { 671 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 672 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 673 mFullyDrawnStartTime = 0; 674 } 675 } 676 677 void setLaunchTime(ActivityRecord r) { 678 if (r.displayStartTime == 0) { 679 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 680 if (mLaunchStartTime == 0) { 681 startLaunchTraces(); 682 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 683 } 684 } else if (mLaunchStartTime == 0) { 685 startLaunchTraces(); 686 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 687 } 688 } 689 690 void clearLaunchTime(ActivityRecord r) { 691 // Make sure that there is no activity waiting for this to launch. 692 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 693 r.displayStartTime = r.fullyDrawnStartTime = 0; 694 } else { 695 mStackSupervisor.removeTimeoutsForActivityLocked(r); 696 mStackSupervisor.scheduleIdleTimeoutLocked(r); 697 } 698 } 699 700 void awakeFromSleepingLocked() { 701 // Ensure activities are no longer sleeping. 702 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 703 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 704 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 705 activities.get(activityNdx).setSleeping(false); 706 } 707 } 708 } 709 710 /** 711 * @return true if something must be done before going to sleep. 712 */ 713 boolean checkReadyForSleepLocked() { 714 if (mResumedActivity != null) { 715 // Still have something resumed; can't sleep until it is paused. 716 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 717 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 718 startPausingLocked(false, true); 719 return true; 720 } 721 if (mPausingActivity != null) { 722 // Still waiting for something to pause; can't sleep yet. 723 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 724 return true; 725 } 726 727 return false; 728 } 729 730 void goToSleep() { 731 ensureActivitiesVisibleLocked(null, 0); 732 733 // Make sure any stopped but visible activities are now sleeping. 734 // This ensures that the activity's onStop() is called. 735 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 736 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 737 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 738 final ActivityRecord r = activities.get(activityNdx); 739 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 740 r.setSleeping(true); 741 } 742 } 743 } 744 } 745 746 /** 747 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 748 * again when requested. 749 */ 750 private void invalidateLastScreenshot() { 751 mLastScreenshotActivity = null; 752 if (mLastScreenshotBitmap != null) { 753 mLastScreenshotBitmap.recycle(); 754 } 755 mLastScreenshotBitmap = null; 756 } 757 758 public final Bitmap screenshotActivities(ActivityRecord who) { 759 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 760 if (who.noDisplay) { 761 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 762 return null; 763 } 764 765 if (isHomeStack()) { 766 // This is an optimization -- since we never show Home or Recents within Recents itself, 767 // we can just go ahead and skip taking the screenshot if this is the home stack. In 768 // the case where the most recent task is not the task that was supplied, then the stack 769 // has changed, so invalidate the last screenshot(). 770 invalidateLastScreenshot(); 771 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 772 return null; 773 } 774 775 int w = mThumbnailWidth; 776 int h = mThumbnailHeight; 777 if (w > 0) { 778 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 779 || mLastScreenshotActivity.state == ActivityState.RESUMED 780 || mLastScreenshotBitmap.getWidth() != w 781 || mLastScreenshotBitmap.getHeight() != h) { 782 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 783 mLastScreenshotActivity = who; 784 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 785 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 786 } 787 if (mLastScreenshotBitmap != null) { 788 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 789 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 790 } 791 } 792 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 793 return null; 794 } 795 796 final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { 797 if (mPausingActivity != null) { 798 Slog.e(TAG, "Trying to pause when pause is already pending for " 799 + mPausingActivity, new RuntimeException("here").fillInStackTrace()); 800 } 801 ActivityRecord prev = mResumedActivity; 802 if (prev == null) { 803 Slog.e(TAG, "Trying to pause when nothing is resumed", 804 new RuntimeException("here").fillInStackTrace()); 805 mStackSupervisor.resumeTopActivitiesLocked(); 806 return; 807 } 808 809 if (mActivityContainer.mParentActivity == null) { 810 // Top level stack, not a child. Look for child stacks. 811 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping); 812 } 813 814 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 815 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 816 mResumedActivity = null; 817 mPausingActivity = prev; 818 mLastPausedActivity = prev; 819 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 820 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 821 prev.state = ActivityState.PAUSING; 822 prev.task.touchActiveTime(); 823 clearLaunchTime(prev); 824 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 825 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task)) { 826 prev.updateThumbnail(screenshotActivities(prev), null); 827 } 828 stopFullyDrawnTraceIfNeeded(); 829 830 mService.updateCpuStats(); 831 832 if (prev.app != null && prev.app.thread != null) { 833 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 834 try { 835 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 836 prev.userId, System.identityHashCode(prev), 837 prev.shortComponentName); 838 mService.updateUsageStats(prev, false); 839 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 840 userLeaving, prev.configChangeFlags); 841 } catch (Exception e) { 842 // Ignore exception, if process died other code will cleanup. 843 Slog.w(TAG, "Exception thrown during pause", e); 844 mPausingActivity = null; 845 mLastPausedActivity = null; 846 mLastNoHistoryActivity = null; 847 } 848 } else { 849 mPausingActivity = null; 850 mLastPausedActivity = null; 851 mLastNoHistoryActivity = null; 852 } 853 854 // If we are not going to sleep, we want to ensure the device is 855 // awake until the next activity is started. 856 if (!mService.isSleepingOrShuttingDown()) { 857 mStackSupervisor.acquireLaunchWakelock(); 858 } 859 860 if (mPausingActivity != null) { 861 // Have the window manager pause its key dispatching until the new 862 // activity has started. If we're pausing the activity just because 863 // the screen is being turned off and the UI is sleeping, don't interrupt 864 // key dispatch; the same activity will pick it up again on wakeup. 865 if (!uiSleeping) { 866 prev.pauseKeyDispatchingLocked(); 867 } else { 868 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 869 } 870 871 // Schedule a pause timeout in case the app doesn't respond. 872 // We don't give it much time because this directly impacts the 873 // responsiveness seen by the user. 874 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 875 msg.obj = prev; 876 prev.pauseTime = SystemClock.uptimeMillis(); 877 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 878 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 879 } else { 880 // This activity failed to schedule the 881 // pause, so just treat it as being paused now. 882 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 883 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 884 } 885 } 886 887 final void activityPausedLocked(IBinder token, boolean timeout, 888 PersistableBundle persistentState) { 889 if (DEBUG_PAUSE) Slog.v( 890 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 891 892 final ActivityRecord r = isInStackLocked(token); 893 if (r != null) { 894 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 895 if (persistentState != null) { 896 r.persistentState = persistentState; 897 mService.notifyTaskPersisterLocked(r.task, false); 898 } 899 if (mPausingActivity == r) { 900 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 901 + (timeout ? " (due to timeout)" : " (pause complete)")); 902 r.state = ActivityState.PAUSED; 903 completePauseLocked(); 904 } else { 905 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 906 r.userId, System.identityHashCode(r), r.shortComponentName, 907 mPausingActivity != null 908 ? mPausingActivity.shortComponentName : "(none)"); 909 } 910 } 911 } 912 913 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 914 PersistableBundle persistentState, CharSequence description) { 915 if (r.state != ActivityState.STOPPING) { 916 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 917 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 918 return; 919 } 920 if (persistentState != null) { 921 r.persistentState = persistentState; 922 mService.notifyTaskPersisterLocked(r.task, false); 923 } 924 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 925 if (icicle != null) { 926 // If icicle is null, this is happening due to a timeout, so we 927 // haven't really saved the state. 928 r.icicle = icicle; 929 r.haveState = true; 930 r.launchCount = 0; 931 r.updateThumbnail(null, description); 932 } 933 if (!r.stopped) { 934 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 935 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 936 r.stopped = true; 937 r.state = ActivityState.STOPPED; 938 if (mActivityContainer.mActivityDisplay.mMediaPlayingActivity == r) { 939 mStackSupervisor.setMediaPlayingLocked(r, false); 940 } 941 if (r.finishing) { 942 r.clearOptionsLocked(); 943 } else { 944 if (r.configDestroy) { 945 destroyActivityLocked(r, true, "stop-config"); 946 mStackSupervisor.resumeTopActivitiesLocked(); 947 } else { 948 mStackSupervisor.updatePreviousProcessLocked(r); 949 } 950 } 951 } 952 } 953 954 private void completePauseLocked() { 955 ActivityRecord prev = mPausingActivity; 956 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 957 958 if (prev != null) { 959 if (prev.finishing) { 960 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 961 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 962 } else if (prev.app != null) { 963 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 964 if (prev.waitingVisible) { 965 prev.waitingVisible = false; 966 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 967 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 968 TAG, "Complete pause, no longer waiting: " + prev); 969 } 970 if (prev.configDestroy) { 971 // The previous is being paused because the configuration 972 // is changing, which means it is actually stopping... 973 // To juggle the fact that we are also starting a new 974 // instance right now, we need to first completely stop 975 // the current instance before starting the new one. 976 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 977 destroyActivityLocked(prev, true, "pause-config"); 978 } else if (!isMediaPlaying()) { 979 // If we were playing then resumeTopActivities will release resources before 980 // stopping. 981 mStackSupervisor.mStoppingActivities.add(prev); 982 if (mStackSupervisor.mStoppingActivities.size() > 3 || 983 prev.frontOfTask && mTaskHistory.size() <= 1) { 984 // If we already have a few activities waiting to stop, 985 // then give up on things going idle and start clearing 986 // them out. Or if r is the last of activity of the last task the stack 987 // will be empty and must be cleared immediately. 988 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 989 mStackSupervisor.scheduleIdleLocked(); 990 } else { 991 mStackSupervisor.checkReadyForSleepLocked(); 992 } 993 } 994 } else { 995 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 996 prev = null; 997 } 998 mPausingActivity = null; 999 } 1000 1001 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1002 if (!mService.isSleepingOrShuttingDown()) { 1003 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1004 } else { 1005 mStackSupervisor.checkReadyForSleepLocked(); 1006 ActivityRecord top = topStack.topRunningActivityLocked(null); 1007 if (top == null || (prev != null && top != prev)) { 1008 // If there are no more activities available to run, 1009 // do resume anyway to start something. Also if the top 1010 // activity on the stack is not the just paused activity, 1011 // we need to go ahead and resume it to ensure we complete 1012 // an in-flight app switch. 1013 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1014 } 1015 } 1016 1017 if (prev != null) { 1018 prev.resumeKeyDispatchingLocked(); 1019 1020 if (prev.app != null && prev.cpuTimeAtResume > 0 1021 && mService.mBatteryStatsService.isOnBattery()) { 1022 long diff; 1023 synchronized (mService.mProcessCpuThread) { 1024 diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1025 - prev.cpuTimeAtResume; 1026 } 1027 if (diff > 0) { 1028 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1029 synchronized (bsi) { 1030 BatteryStatsImpl.Uid.Proc ps = 1031 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1032 prev.info.packageName); 1033 if (ps != null) { 1034 ps.addForegroundTimeLocked(diff); 1035 } 1036 } 1037 } 1038 } 1039 prev.cpuTimeAtResume = 0; // reset it 1040 } 1041 } 1042 1043 /** 1044 * Once we know that we have asked an application to put an activity in 1045 * the resumed state (either by launching it or explicitly telling it), 1046 * this function updates the rest of our state to match that fact. 1047 */ 1048 private void completeResumeLocked(ActivityRecord next) { 1049 next.idle = false; 1050 next.results = null; 1051 next.newIntents = null; 1052 1053 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1054 ProcessRecord app = next.task.mActivities.get(0).app; 1055 if (app != null && app != mService.mHomeProcess) { 1056 mService.mHomeProcess = app; 1057 } 1058 } 1059 1060 if (next.nowVisible) { 1061 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1062 mStackSupervisor.dismissKeyguard(); 1063 } 1064 1065 // schedule an idle timeout in case the app doesn't do it for us. 1066 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1067 1068 mStackSupervisor.reportResumedActivityLocked(next); 1069 1070 next.resumeKeyDispatchingLocked(); 1071 mNoAnimActivities.clear(); 1072 1073 // Mark the point when the activity is resuming 1074 // TODO: To be more accurate, the mark should be before the onCreate, 1075 // not after the onResume. But for subsequent starts, onResume is fine. 1076 if (next.app != null) { 1077 synchronized (mService.mProcessCpuThread) { 1078 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1079 } 1080 } else { 1081 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1082 } 1083 1084 // If we are resuming the activity that we had last screenshotted, then we know it will be 1085 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1086 if (next == mLastScreenshotActivity) { 1087 invalidateLastScreenshot(); 1088 } 1089 next.returningOptions = null; 1090 } 1091 1092 private void setVisibile(ActivityRecord r, boolean visible) { 1093 r.visible = visible; 1094 mWindowManager.setAppVisibility(r.appToken, visible); 1095 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1096 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1097 ActivityContainer container = containers.get(containerNdx); 1098 container.setVisible(visible); 1099 } 1100 } 1101 1102 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1103 // If so, this stack is hidden, otherwise it is visible. 1104 private boolean isStackVisible() { 1105 if (!isAttached()) { 1106 return false; 1107 } 1108 1109 if (mStackSupervisor.isFrontStack(this)) { 1110 return true; 1111 } 1112 1113 /** 1114 * Start at the task above this one and go up, looking for a visible 1115 * fullscreen activity, or a translucent activity that requested the 1116 * wallpaper to be shown behind it. 1117 */ 1118 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1119 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1120 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1121 final TaskRecord task = tasks.get(taskNdx); 1122 final ArrayList<ActivityRecord> activities = task.mActivities; 1123 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1124 final ActivityRecord r = activities.get(activityNdx); 1125 1126 // Conditions for an activity to obscure the stack we're 1127 // examining: 1128 // 1. Not Finishing AND Visible AND: 1129 // 2. Either: 1130 // - Full Screen Activity OR 1131 // - On top of Home and our stack is NOT home 1132 if (!r.finishing && r.visible && (r.fullscreen || 1133 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1134 return false; 1135 } 1136 } 1137 } 1138 } 1139 1140 return true; 1141 } 1142 1143 /** 1144 * Make sure that all activities that need to be visible (that is, they 1145 * currently can be seen by the user) actually are. 1146 */ 1147 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1148 ActivityRecord top = topRunningActivityLocked(null); 1149 if (top == null) { 1150 return; 1151 } 1152 if (DEBUG_VISBILITY) Slog.v( 1153 TAG, "ensureActivitiesVisible behind " + top 1154 + " configChanges=0x" + Integer.toHexString(configChanges)); 1155 1156 if (mTranslucentActivityWaiting != top) { 1157 mUndrawnActivitiesBelowTopTranslucent.clear(); 1158 if (mTranslucentActivityWaiting != null) { 1159 // Call the callback with a timeout indication. 1160 notifyActivityDrawnLocked(null); 1161 mTranslucentActivityWaiting = null; 1162 } 1163 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1164 } 1165 1166 // If the top activity is not fullscreen, then we need to 1167 // make sure any activities under it are now visible. 1168 boolean aboveTop = true; 1169 boolean behindFullscreen = !isStackVisible(); 1170 1171 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1172 final TaskRecord task = mTaskHistory.get(taskNdx); 1173 final ArrayList<ActivityRecord> activities = task.mActivities; 1174 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1175 final ActivityRecord r = activities.get(activityNdx); 1176 if (r.finishing) { 1177 continue; 1178 } 1179 if (aboveTop && r != top) { 1180 continue; 1181 } 1182 aboveTop = false; 1183 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1184 // but must be drawn initially for the animation as though they were visible. 1185 if (!behindFullscreen || r.mLaunchTaskBehind) { 1186 if (DEBUG_VISBILITY) Slog.v( 1187 TAG, "Make visible? " + r + " finishing=" + r.finishing 1188 + " state=" + r.state); 1189 1190 // First: if this is not the current activity being started, make 1191 // sure it matches the current configuration. 1192 if (r != starting) { 1193 ensureActivityConfigurationLocked(r, 0); 1194 } 1195 1196 if (r.app == null || r.app.thread == null) { 1197 // This activity needs to be visible, but isn't even 1198 // running... get it started, but don't resume it 1199 // at this point. 1200 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1201 if (r != starting) { 1202 r.startFreezingScreenLocked(r.app, configChanges); 1203 } 1204 if (!r.visible || r.mLaunchTaskBehind) { 1205 if (DEBUG_VISBILITY) Slog.v( 1206 TAG, "Starting and making visible: " + r); 1207 setVisibile(r, true); 1208 } 1209 if (r != starting) { 1210 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1211 } 1212 1213 } else if (r.visible) { 1214 // If this activity is already visible, then there is nothing 1215 // else to do here. 1216 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1217 r.stopFreezingScreenLocked(false); 1218 try { 1219 if (r.returningOptions != null) { 1220 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1221 r.returningOptions); 1222 } 1223 } catch(RemoteException e) { 1224 } 1225 } else { 1226 // This activity is not currently visible, but is running. 1227 // Tell it to become visible. 1228 r.visible = true; 1229 if (r.state != ActivityState.RESUMED && r != starting) { 1230 // If this activity is paused, tell it 1231 // to now show its window. 1232 if (DEBUG_VISBILITY) Slog.v( 1233 TAG, "Making visible and scheduling visibility: " + r); 1234 try { 1235 if (mTranslucentActivityWaiting != null) { 1236 r.updateOptionsLocked(r.returningOptions); 1237 mUndrawnActivitiesBelowTopTranslucent.add(r); 1238 } 1239 setVisibile(r, true); 1240 r.sleeping = false; 1241 r.app.pendingUiClean = true; 1242 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1243 r.stopFreezingScreenLocked(false); 1244 } catch (Exception e) { 1245 // Just skip on any failure; we'll make it 1246 // visible when it next restarts. 1247 Slog.w(TAG, "Exception thrown making visibile: " 1248 + r.intent.getComponent(), e); 1249 } 1250 } 1251 } 1252 1253 // Aggregate current change flags. 1254 configChanges |= r.configChangeFlags; 1255 1256 if (r.fullscreen) { 1257 // At this point, nothing else needs to be shown 1258 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1259 behindFullscreen = true; 1260 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1261 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1262 behindFullscreen = true; 1263 } 1264 } else { 1265 if (DEBUG_VISBILITY) Slog.v( 1266 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1267 + " state=" + r.state 1268 + " behindFullscreen=" + behindFullscreen); 1269 // Now for any activities that aren't visible to the user, make 1270 // sure they no longer are keeping the screen frozen. 1271 if (r.visible) { 1272 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1273 try { 1274 setVisibile(r, false); 1275 switch (r.state) { 1276 case STOPPING: 1277 case STOPPED: 1278 if (r.app != null && r.app.thread != null) { 1279 if (DEBUG_VISBILITY) Slog.v( 1280 TAG, "Scheduling invisibility: " + r); 1281 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1282 } 1283 break; 1284 1285 case INITIALIZING: 1286 case RESUMED: 1287 case PAUSING: 1288 case PAUSED: 1289 // This case created for transitioning activities from 1290 // translucent to opaque {@link Activity#convertToOpaque}. 1291 if (getMediaPlayer() == r) { 1292 releaseMediaResources(); 1293 } else { 1294 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1295 mStackSupervisor.mStoppingActivities.add(r); 1296 } 1297 mStackSupervisor.scheduleIdleLocked(); 1298 } 1299 break; 1300 1301 default: 1302 break; 1303 } 1304 } catch (Exception e) { 1305 // Just skip on any failure; we'll make it 1306 // visible when it next restarts. 1307 Slog.w(TAG, "Exception thrown making hidden: " 1308 + r.intent.getComponent(), e); 1309 } 1310 } else { 1311 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1312 } 1313 } 1314 } 1315 } 1316 1317 if (mTranslucentActivityWaiting != null && 1318 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1319 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1320 notifyActivityDrawnLocked(null); 1321 } 1322 } 1323 1324 void convertToTranslucent(ActivityRecord r) { 1325 mTranslucentActivityWaiting = r; 1326 mUndrawnActivitiesBelowTopTranslucent.clear(); 1327 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1328 } 1329 1330 /** 1331 * Called as activities below the top translucent activity are redrawn. When the last one is 1332 * redrawn notify the top activity by calling 1333 * {@link Activity#onTranslucentConversionComplete}. 1334 * 1335 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1336 * occurred and the activity will be notified immediately. 1337 */ 1338 void notifyActivityDrawnLocked(ActivityRecord r) { 1339 mActivityContainer.setDrawn(); 1340 if ((r == null) 1341 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1342 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1343 // The last undrawn activity below the top has just been drawn. If there is an 1344 // opaque activity at the top, notify it that it can become translucent safely now. 1345 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1346 mTranslucentActivityWaiting = null; 1347 mUndrawnActivitiesBelowTopTranslucent.clear(); 1348 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1349 1350 if (waitingActivity != null) { 1351 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1352 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1353 try { 1354 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1355 waitingActivity.appToken, r != null); 1356 } catch (RemoteException e) { 1357 } 1358 } 1359 } 1360 } 1361 } 1362 1363 /** If any activities below the top running one are in the INITIALIZING state and they have a 1364 * starting window displayed then remove that starting window. It is possible that the activity 1365 * in this state will never resumed in which case that starting window will be orphaned. */ 1366 void cancelInitializingActivities() { 1367 final ActivityRecord topActivity = topRunningActivityLocked(null); 1368 boolean aboveTop = true; 1369 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1370 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1371 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1372 final ActivityRecord r = activities.get(activityNdx); 1373 if (aboveTop) { 1374 if (r == topActivity) { 1375 aboveTop = false; 1376 } 1377 continue; 1378 } 1379 1380 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1381 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1382 r.mStartingWindowShown = false; 1383 mWindowManager.removeAppStartingWindow(r.appToken); 1384 } 1385 } 1386 } 1387 } 1388 1389 /** 1390 * Ensure that the top activity in the stack is resumed. 1391 * 1392 * @param prev The previously resumed activity, for when in the process 1393 * of pausing; can be null to call from elsewhere. 1394 * 1395 * @return Returns true if something is being resumed, or false if 1396 * nothing happened. 1397 */ 1398 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1399 return resumeTopActivityLocked(prev, null); 1400 } 1401 1402 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1403 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1404 1405 ActivityRecord parent = mActivityContainer.mParentActivity; 1406 if ((parent != null && parent.state != ActivityState.RESUMED) || 1407 !mActivityContainer.isAttachedLocked()) { 1408 // Do not resume this stack if its parent is not resumed. 1409 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1410 return false; 1411 } 1412 1413 cancelInitializingActivities(); 1414 1415 // Find the first activity that is not finishing. 1416 ActivityRecord next = topRunningActivityLocked(null); 1417 1418 // Remember how we'll process this pause/resume situation, and ensure 1419 // that the state is reset however we wind up proceeding. 1420 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1421 mStackSupervisor.mUserLeaving = false; 1422 1423 final TaskRecord prevTask = prev != null ? prev.task : null; 1424 if (next == null) { 1425 // There are no more activities! Let's just start up the 1426 // Launcher... 1427 ActivityOptions.abort(options); 1428 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1429 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1430 // Only resume home if on home display 1431 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1432 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1433 return isOnHomeDisplay() && 1434 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1435 } 1436 1437 next.delayedResume = false; 1438 1439 // If the top activity is the resumed one, nothing to do. 1440 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1441 mStackSupervisor.allResumedActivitiesComplete()) { 1442 // Make sure we have executed any pending transitions, since there 1443 // should be nothing left to do at this point. 1444 mWindowManager.executeAppTransition(); 1445 mNoAnimActivities.clear(); 1446 ActivityOptions.abort(options); 1447 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1448 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1449 return false; 1450 } 1451 1452 final TaskRecord nextTask = next.task; 1453 if (prevTask != null && prevTask.stack == this && 1454 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1455 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1456 if (prevTask == nextTask) { 1457 prevTask.setFrontOfTask(); 1458 } else if (prevTask != topTask()) { 1459 // This task is going away but it was supposed to return to the home stack. 1460 // Now the task above it has to return to the home task instead. 1461 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1462 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1463 } else { 1464 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1465 "resumeTopActivityLocked: Launching home next"); 1466 // Only resume home if on home display 1467 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1468 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1469 return isOnHomeDisplay() && 1470 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1471 } 1472 } 1473 1474 // If we are sleeping, and there is no resumed activity, and the top 1475 // activity is paused, well that is the state we want. 1476 if (mService.isSleepingOrShuttingDown() 1477 && mLastPausedActivity == next 1478 && mStackSupervisor.allPausedActivitiesComplete()) { 1479 // Make sure we have executed any pending transitions, since there 1480 // should be nothing left to do at this point. 1481 mWindowManager.executeAppTransition(); 1482 mNoAnimActivities.clear(); 1483 ActivityOptions.abort(options); 1484 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1485 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1486 return false; 1487 } 1488 1489 // Make sure that the user who owns this activity is started. If not, 1490 // we will just leave it as is because someone should be bringing 1491 // another user's activities to the top of the stack. 1492 if (mService.mStartedUsers.get(next.userId) == null) { 1493 Slog.w(TAG, "Skipping resume of top activity " + next 1494 + ": user " + next.userId + " is stopped"); 1495 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1496 return false; 1497 } 1498 1499 // The activity may be waiting for stop, but that is no longer 1500 // appropriate for it. 1501 mStackSupervisor.mStoppingActivities.remove(next); 1502 mStackSupervisor.mGoingToSleepActivities.remove(next); 1503 next.sleeping = false; 1504 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1505 1506 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1507 1508 // If we are currently pausing an activity, then don't do anything 1509 // until that is done. 1510 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1511 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1512 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1513 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1514 return false; 1515 } 1516 1517 // Okay we are now going to start a switch, to 'next'. We may first 1518 // have to pause the current activity, but this is an important point 1519 // where we have decided to go to 'next' so keep track of that. 1520 // XXX "App Redirected" dialog is getting too many false positives 1521 // at this point, so turn off for now. 1522 if (false) { 1523 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1524 long now = SystemClock.uptimeMillis(); 1525 final boolean inTime = mLastStartedActivity.startTime != 0 1526 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1527 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1528 final int nextUid = next.info.applicationInfo.uid; 1529 if (inTime && lastUid != nextUid 1530 && lastUid != next.launchedFromUid 1531 && mService.checkPermission( 1532 android.Manifest.permission.STOP_APP_SWITCHES, 1533 -1, next.launchedFromUid) 1534 != PackageManager.PERMISSION_GRANTED) { 1535 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1536 } else { 1537 next.startTime = now; 1538 mLastStartedActivity = next; 1539 } 1540 } else { 1541 next.startTime = SystemClock.uptimeMillis(); 1542 mLastStartedActivity = next; 1543 } 1544 } 1545 1546 // We need to start pausing the current activity so the top one 1547 // can be resumed... 1548 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving); 1549 if (mResumedActivity != null) { 1550 pausing = true; 1551 startPausingLocked(userLeaving, false); 1552 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1553 } 1554 if (pausing) { 1555 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1556 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1557 // At this point we want to put the upcoming activity's process 1558 // at the top of the LRU list, since we know we will be needing it 1559 // very soon and it would be a waste to let it get killed if it 1560 // happens to be sitting towards the end. 1561 if (next.app != null && next.app.thread != null) { 1562 mService.updateLruProcessLocked(next.app, true, null); 1563 } 1564 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1565 return true; 1566 } 1567 1568 // If the most recent activity was noHistory but was only stopped rather 1569 // than stopped+finished because the device went to sleep, we need to make 1570 // sure to finish it as we're making a new activity topmost. 1571 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1572 !mLastNoHistoryActivity.finishing) { 1573 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1574 " on new resume"); 1575 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1576 null, "no-history", false); 1577 mLastNoHistoryActivity = null; 1578 } 1579 1580 if (prev != null && prev != next) { 1581 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1582 prev.waitingVisible = true; 1583 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1584 if (DEBUG_SWITCH) Slog.v( 1585 TAG, "Resuming top, waiting visible to hide: " + prev); 1586 } else { 1587 // The next activity is already visible, so hide the previous 1588 // activity's windows right now so we can show the new one ASAP. 1589 // We only do this if the previous is finishing, which should mean 1590 // it is on top of the one being resumed so hiding it quickly 1591 // is good. Otherwise, we want to do the normal route of allowing 1592 // the resumed activity to be shown so we can decide if the 1593 // previous should actually be hidden depending on whether the 1594 // new one is found to be full-screen or not. 1595 if (prev.finishing) { 1596 mWindowManager.setAppVisibility(prev.appToken, false); 1597 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1598 + prev + ", waitingVisible=" 1599 + (prev != null ? prev.waitingVisible : null) 1600 + ", nowVisible=" + next.nowVisible); 1601 } else { 1602 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1603 + prev + ", waitingVisible=" 1604 + (prev != null ? prev.waitingVisible : null) 1605 + ", nowVisible=" + next.nowVisible); 1606 } 1607 } 1608 } 1609 1610 // Launching this app's activity, make sure the app is no longer 1611 // considered stopped. 1612 try { 1613 AppGlobals.getPackageManager().setPackageStoppedState( 1614 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1615 } catch (RemoteException e1) { 1616 } catch (IllegalArgumentException e) { 1617 Slog.w(TAG, "Failed trying to unstop package " 1618 + next.packageName + ": " + e); 1619 } 1620 1621 // We are starting up the next activity, so tell the window manager 1622 // that the previous one will be hidden soon. This way it can know 1623 // to ignore it when computing the desired screen orientation. 1624 boolean anim = true; 1625 if (prev != null) { 1626 if (prev.finishing) { 1627 if (DEBUG_TRANSITION) Slog.v(TAG, 1628 "Prepare close transition: prev=" + prev); 1629 if (mNoAnimActivities.contains(prev)) { 1630 anim = false; 1631 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1632 } else { 1633 mWindowManager.prepareAppTransition(prev.task == next.task 1634 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1635 : AppTransition.TRANSIT_TASK_CLOSE, false); 1636 } 1637 mWindowManager.setAppWillBeHidden(prev.appToken); 1638 mWindowManager.setAppVisibility(prev.appToken, false); 1639 } else { 1640 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1641 if (mNoAnimActivities.contains(next)) { 1642 anim = false; 1643 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1644 } else { 1645 mWindowManager.prepareAppTransition(prev.task == next.task 1646 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1647 : next.mLaunchTaskBehind 1648 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1649 : AppTransition.TRANSIT_TASK_OPEN, false); 1650 } 1651 } 1652 if (false) { 1653 mWindowManager.setAppWillBeHidden(prev.appToken); 1654 mWindowManager.setAppVisibility(prev.appToken, false); 1655 } 1656 } else { 1657 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1658 if (mNoAnimActivities.contains(next)) { 1659 anim = false; 1660 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1661 } else { 1662 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1663 } 1664 } 1665 1666 Bundle resumeAnimOptions = null; 1667 if (anim) { 1668 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1669 if (opts != null) { 1670 resumeAnimOptions = opts.toBundle(); 1671 } 1672 next.applyOptionsLocked(); 1673 } else { 1674 next.clearOptionsLocked(); 1675 } 1676 1677 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1678 if (next.app != null && next.app.thread != null) { 1679 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1680 1681 // This activity is now becoming visible. 1682 mWindowManager.setAppVisibility(next.appToken, true); 1683 1684 // schedule launch ticks to collect information about slow apps. 1685 next.startLaunchTickingLocked(); 1686 1687 ActivityRecord lastResumedActivity = 1688 lastStack == null ? null :lastStack.mResumedActivity; 1689 ActivityState lastState = next.state; 1690 1691 mService.updateCpuStats(); 1692 1693 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1694 next.state = ActivityState.RESUMED; 1695 mResumedActivity = next; 1696 next.task.touchActiveTime(); 1697 mService.addRecentTaskLocked(next.task); 1698 mService.updateLruProcessLocked(next.app, true, null); 1699 updateLRUListLocked(next); 1700 mService.updateOomAdjLocked(); 1701 1702 // Have the window manager re-evaluate the orientation of 1703 // the screen based on the new activity order. 1704 boolean notUpdated = true; 1705 if (mStackSupervisor.isFrontStack(this)) { 1706 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1707 mService.mConfiguration, 1708 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1709 if (config != null) { 1710 next.frozenBeforeDestroy = true; 1711 } 1712 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1713 } 1714 1715 if (notUpdated) { 1716 // The configuration update wasn't able to keep the existing 1717 // instance of the activity, and instead started a new one. 1718 // We should be all done, but let's just make sure our activity 1719 // is still at the top and schedule another run if something 1720 // weird happened. 1721 ActivityRecord nextNext = topRunningActivityLocked(null); 1722 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1723 "Activity config changed during resume: " + next 1724 + ", new next: " + nextNext); 1725 if (nextNext != next) { 1726 // Do over! 1727 mStackSupervisor.scheduleResumeTopActivities(); 1728 } 1729 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1730 mNoAnimActivities.clear(); 1731 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1732 return true; 1733 } 1734 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1735 return false; 1736 } 1737 1738 try { 1739 // Deliver all pending results. 1740 ArrayList<ResultInfo> a = next.results; 1741 if (a != null) { 1742 final int N = a.size(); 1743 if (!next.finishing && N > 0) { 1744 if (DEBUG_RESULTS) Slog.v( 1745 TAG, "Delivering results to " + next 1746 + ": " + a); 1747 next.app.thread.scheduleSendResult(next.appToken, a); 1748 } 1749 } 1750 1751 if (next.newIntents != null) { 1752 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1753 } 1754 1755 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1756 next.userId, System.identityHashCode(next), 1757 next.task.taskId, next.shortComponentName); 1758 1759 next.sleeping = false; 1760 mService.showAskCompatModeDialogLocked(next); 1761 next.app.pendingUiClean = true; 1762 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1763 next.clearOptionsLocked(); 1764 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1765 mService.isNextTransitionForward(), resumeAnimOptions); 1766 1767 mStackSupervisor.checkReadyForSleepLocked(); 1768 1769 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1770 } catch (Exception e) { 1771 // Whoops, need to restart this activity! 1772 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1773 + lastState + ": " + next); 1774 next.state = lastState; 1775 if (lastStack != null) { 1776 lastStack.mResumedActivity = lastResumedActivity; 1777 } 1778 Slog.i(TAG, "Restarting because process died: " + next); 1779 if (!next.hasBeenLaunched) { 1780 next.hasBeenLaunched = true; 1781 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1782 mStackSupervisor.isFrontStack(lastStack)) { 1783 mWindowManager.setAppStartingWindow( 1784 next.appToken, next.packageName, next.theme, 1785 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1786 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1787 next.windowFlags, null, true); 1788 } 1789 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1790 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1791 return true; 1792 } 1793 1794 // From this point on, if something goes wrong there is no way 1795 // to recover the activity. 1796 try { 1797 next.visible = true; 1798 completeResumeLocked(next); 1799 } catch (Exception e) { 1800 // If any exception gets thrown, toss away this 1801 // activity and try the next one. 1802 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1803 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1804 "resume-exception", true); 1805 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1806 return true; 1807 } 1808 next.stopped = false; 1809 1810 } else { 1811 // Whoops, need to restart this activity! 1812 if (!next.hasBeenLaunched) { 1813 next.hasBeenLaunched = true; 1814 } else { 1815 if (SHOW_APP_STARTING_PREVIEW) { 1816 mWindowManager.setAppStartingWindow( 1817 next.appToken, next.packageName, next.theme, 1818 mService.compatibilityInfoForPackageLocked( 1819 next.info.applicationInfo), 1820 next.nonLocalizedLabel, 1821 next.labelRes, next.icon, next.logo, next.windowFlags, 1822 null, true); 1823 } 1824 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1825 } 1826 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1827 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1828 } 1829 1830 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1831 return true; 1832 } 1833 1834 private void insertTaskAtTop(TaskRecord task) { 1835 // If this is being moved to the top by another activity or being launched from the home 1836 // activity, set mOnTopOfHome accordingly. 1837 if (isOnHomeDisplay()) { 1838 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1839 final boolean fromHome = lastStack.isHomeStack(); 1840 if (!isHomeStack() && (fromHome || topTask() != task)) { 1841 task.setTaskToReturnTo(fromHome 1842 ? lastStack.topTask() == null 1843 ? HOME_ACTIVITY_TYPE 1844 : lastStack.topTask().taskType 1845 : APPLICATION_ACTIVITY_TYPE); 1846 } 1847 } else { 1848 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1849 } 1850 1851 mTaskHistory.remove(task); 1852 // Now put task at top. 1853 int taskNdx = mTaskHistory.size(); 1854 if (!isCurrentProfileLocked(task.userId)) { 1855 // Put non-current user tasks below current user tasks. 1856 while (--taskNdx >= 0) { 1857 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1858 break; 1859 } 1860 } 1861 ++taskNdx; 1862 } 1863 mTaskHistory.add(taskNdx, task); 1864 updateTaskMovement(task, true); 1865 } 1866 1867 final void startActivityLocked(ActivityRecord r, boolean newTask, 1868 boolean doResume, boolean keepCurTransition, Bundle options) { 1869 TaskRecord rTask = r.task; 1870 final int taskId = rTask.taskId; 1871 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1872 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1873 // Last activity in task had been removed or ActivityManagerService is reusing task. 1874 // Insert or replace. 1875 // Might not even be in. 1876 insertTaskAtTop(rTask); 1877 mWindowManager.moveTaskToTop(taskId); 1878 } 1879 TaskRecord task = null; 1880 if (!newTask) { 1881 // If starting in an existing task, find where that is... 1882 boolean startIt = true; 1883 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1884 task = mTaskHistory.get(taskNdx); 1885 if (task.getTopActivity() == null) { 1886 // All activities in task are finishing. 1887 continue; 1888 } 1889 if (task == r.task) { 1890 // Here it is! Now, if this is not yet visible to the 1891 // user, then just add it without starting; it will 1892 // get started when the user navigates back to it. 1893 if (!startIt) { 1894 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1895 + task, new RuntimeException("here").fillInStackTrace()); 1896 task.addActivityToTop(r); 1897 r.putInHistory(); 1898 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1899 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1900 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1901 r.userId, r.info.configChanges, task.voiceSession != null, 1902 r.mLaunchTaskBehind); 1903 if (VALIDATE_TOKENS) { 1904 validateAppTokensLocked(); 1905 } 1906 ActivityOptions.abort(options); 1907 return; 1908 } 1909 break; 1910 } else if (task.numFullscreen > 0) { 1911 startIt = false; 1912 } 1913 } 1914 } 1915 1916 // Place a new activity at top of stack, so it is next to interact 1917 // with the user. 1918 1919 // If we are not placing the new activity frontmost, we do not want 1920 // to deliver the onUserLeaving callback to the actual frontmost 1921 // activity 1922 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1923 mStackSupervisor.mUserLeaving = false; 1924 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1925 "startActivity() behind front, mUserLeaving=false"); 1926 } 1927 1928 task = r.task; 1929 1930 // Slot the activity into the history stack and proceed 1931 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1932 new RuntimeException("here").fillInStackTrace()); 1933 task.addActivityToTop(r); 1934 task.setFrontOfTask(); 1935 1936 r.putInHistory(); 1937 if (!isHomeStack() || numActivities() > 0) { 1938 // We want to show the starting preview window if we are 1939 // switching to a new task, or the next activity's process is 1940 // not currently running. 1941 boolean showStartingIcon = newTask; 1942 ProcessRecord proc = r.app; 1943 if (proc == null) { 1944 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 1945 } 1946 if (proc == null || proc.thread == null) { 1947 showStartingIcon = true; 1948 } 1949 if (DEBUG_TRANSITION) Slog.v(TAG, 1950 "Prepare open transition: starting " + r); 1951 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 1952 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 1953 mNoAnimActivities.add(r); 1954 } else { 1955 mWindowManager.prepareAppTransition(newTask 1956 ? r.mLaunchTaskBehind 1957 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1958 : AppTransition.TRANSIT_TASK_OPEN 1959 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 1960 mNoAnimActivities.remove(r); 1961 } 1962 mWindowManager.addAppToken(task.mActivities.indexOf(r), 1963 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1964 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 1965 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 1966 boolean doShow = true; 1967 if (newTask) { 1968 // Even though this activity is starting fresh, we still need 1969 // to reset it to make sure we apply affinities to move any 1970 // existing activities from other tasks in to it. 1971 // If the caller has requested that the target task be 1972 // reset, then do so. 1973 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 1974 resetTaskIfNeededLocked(r, r); 1975 doShow = topRunningNonDelayedActivityLocked(null) == r; 1976 } 1977 } else if (options != null && new ActivityOptions(options).getAnimationType() 1978 == ActivityOptions.ANIM_SCENE_TRANSITION) { 1979 doShow = false; 1980 } 1981 if (r.mLaunchTaskBehind) { 1982 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 1983 // tell WindowManager that r is visible even though it is at the back of the stack. 1984 mWindowManager.setAppVisibility(r.appToken, true); 1985 ensureActivitiesVisibleLocked(null, 0); 1986 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 1987 // Figure out if we are transitioning from another activity that is 1988 // "has the same starting icon" as the next one. This allows the 1989 // window manager to keep the previous window it had previously 1990 // created, if it still had one. 1991 ActivityRecord prev = mResumedActivity; 1992 if (prev != null) { 1993 // We don't want to reuse the previous starting preview if: 1994 // (1) The current activity is in a different task. 1995 if (prev.task != r.task) { 1996 prev = null; 1997 } 1998 // (2) The current activity is already displayed. 1999 else if (prev.nowVisible) { 2000 prev = null; 2001 } 2002 } 2003 mWindowManager.setAppStartingWindow( 2004 r.appToken, r.packageName, r.theme, 2005 mService.compatibilityInfoForPackageLocked( 2006 r.info.applicationInfo), r.nonLocalizedLabel, 2007 r.labelRes, r.icon, r.logo, r.windowFlags, 2008 prev != null ? prev.appToken : null, showStartingIcon); 2009 r.mStartingWindowShown = true; 2010 } 2011 } else { 2012 // If this is the first activity, don't do any fancy animations, 2013 // because there is nothing for it to animate on top of. 2014 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2015 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2016 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2017 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2018 ActivityOptions.abort(options); 2019 options = null; 2020 } 2021 if (VALIDATE_TOKENS) { 2022 validateAppTokensLocked(); 2023 } 2024 2025 if (doResume) { 2026 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2027 } 2028 } 2029 2030 final void validateAppTokensLocked() { 2031 mValidateAppTokens.clear(); 2032 mValidateAppTokens.ensureCapacity(numActivities()); 2033 final int numTasks = mTaskHistory.size(); 2034 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2035 TaskRecord task = mTaskHistory.get(taskNdx); 2036 final ArrayList<ActivityRecord> activities = task.mActivities; 2037 if (activities.isEmpty()) { 2038 continue; 2039 } 2040 TaskGroup group = new TaskGroup(); 2041 group.taskId = task.taskId; 2042 mValidateAppTokens.add(group); 2043 final int numActivities = activities.size(); 2044 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2045 final ActivityRecord r = activities.get(activityNdx); 2046 group.tokens.add(r.appToken); 2047 } 2048 } 2049 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2050 } 2051 2052 /** 2053 * Perform a reset of the given task, if needed as part of launching it. 2054 * Returns the new HistoryRecord at the top of the task. 2055 */ 2056 /** 2057 * Helper method for #resetTaskIfNeededLocked. 2058 * We are inside of the task being reset... we'll either finish this activity, push it out 2059 * for another task, or leave it as-is. 2060 * @param task The task containing the Activity (taskTop) that might be reset. 2061 * @param forceReset 2062 * @return An ActivityOptions that needs to be processed. 2063 */ 2064 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2065 ActivityOptions topOptions = null; 2066 2067 int replyChainEnd = -1; 2068 boolean canMoveOptions = true; 2069 2070 // We only do this for activities that are not the root of the task (since if we finish 2071 // the root, we may no longer have the task!). 2072 final ArrayList<ActivityRecord> activities = task.mActivities; 2073 final int numActivities = activities.size(); 2074 final int rootActivityNdx = task.findEffectiveRootIndex(); 2075 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2076 ActivityRecord target = activities.get(i); 2077 if (target.frontOfTask) 2078 break; 2079 2080 final int flags = target.info.flags; 2081 final boolean finishOnTaskLaunch = 2082 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2083 final boolean allowTaskReparenting = 2084 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2085 final boolean clearWhenTaskReset = 2086 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2087 2088 if (!finishOnTaskLaunch 2089 && !clearWhenTaskReset 2090 && target.resultTo != null) { 2091 // If this activity is sending a reply to a previous 2092 // activity, we can't do anything with it now until 2093 // we reach the start of the reply chain. 2094 // XXX note that we are assuming the result is always 2095 // to the previous activity, which is almost always 2096 // the case but we really shouldn't count on. 2097 if (replyChainEnd < 0) { 2098 replyChainEnd = i; 2099 } 2100 } else if (!finishOnTaskLaunch 2101 && !clearWhenTaskReset 2102 && allowTaskReparenting 2103 && target.taskAffinity != null 2104 && !target.taskAffinity.equals(task.affinity)) { 2105 // If this activity has an affinity for another 2106 // task, then we need to move it out of here. We will 2107 // move it as far out of the way as possible, to the 2108 // bottom of the activity stack. This also keeps it 2109 // correctly ordered with any activities we previously 2110 // moved. 2111 final TaskRecord targetTask; 2112 final ActivityRecord bottom = 2113 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2114 mTaskHistory.get(0).mActivities.get(0) : null; 2115 if (bottom != null && target.taskAffinity != null 2116 && target.taskAffinity.equals(bottom.task.affinity)) { 2117 // If the activity currently at the bottom has the 2118 // same task affinity as the one we are moving, 2119 // then merge it into the same task. 2120 targetTask = bottom.task; 2121 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2122 + " out to bottom task " + bottom.task); 2123 } else { 2124 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2125 null, null, null, false); 2126 targetTask.affinityIntent = target.intent; 2127 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2128 + " out to new task " + target.task); 2129 } 2130 2131 final int targetTaskId = targetTask.taskId; 2132 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2133 2134 boolean noOptions = canMoveOptions; 2135 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2136 for (int srcPos = start; srcPos >= i; --srcPos) { 2137 final ActivityRecord p = activities.get(srcPos); 2138 if (p.finishing) { 2139 continue; 2140 } 2141 2142 canMoveOptions = false; 2143 if (noOptions && topOptions == null) { 2144 topOptions = p.takeOptionsLocked(); 2145 if (topOptions != null) { 2146 noOptions = false; 2147 } 2148 } 2149 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2150 + task + " adding to task=" + targetTask 2151 + " Callers=" + Debug.getCallers(4)); 2152 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2153 + " out to target's task " + target.task); 2154 p.setTask(targetTask, null); 2155 targetTask.addActivityAtBottom(p); 2156 2157 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2158 } 2159 2160 mWindowManager.moveTaskToBottom(targetTaskId); 2161 if (VALIDATE_TOKENS) { 2162 validateAppTokensLocked(); 2163 } 2164 2165 replyChainEnd = -1; 2166 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2167 // If the activity should just be removed -- either 2168 // because it asks for it, or the task should be 2169 // cleared -- then finish it and anything that is 2170 // part of its reply chain. 2171 int end; 2172 if (clearWhenTaskReset) { 2173 // In this case, we want to finish this activity 2174 // and everything above it, so be sneaky and pretend 2175 // like these are all in the reply chain. 2176 end = numActivities - 1; 2177 } else if (replyChainEnd < 0) { 2178 end = i; 2179 } else { 2180 end = replyChainEnd; 2181 } 2182 boolean noOptions = canMoveOptions; 2183 for (int srcPos = i; srcPos <= end; srcPos++) { 2184 ActivityRecord p = activities.get(srcPos); 2185 if (p.finishing) { 2186 continue; 2187 } 2188 canMoveOptions = false; 2189 if (noOptions && topOptions == null) { 2190 topOptions = p.takeOptionsLocked(); 2191 if (topOptions != null) { 2192 noOptions = false; 2193 } 2194 } 2195 if (DEBUG_TASKS) Slog.w(TAG, 2196 "resetTaskIntendedTask: calling finishActivity on " + p); 2197 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2198 end--; 2199 srcPos--; 2200 } 2201 } 2202 replyChainEnd = -1; 2203 } else { 2204 // If we were in the middle of a chain, well the 2205 // activity that started it all doesn't want anything 2206 // special, so leave it all as-is. 2207 replyChainEnd = -1; 2208 } 2209 } 2210 2211 return topOptions; 2212 } 2213 2214 /** 2215 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2216 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2217 * @param affinityTask The task we are looking for an affinity to. 2218 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2219 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2220 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2221 */ 2222 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2223 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2224 int replyChainEnd = -1; 2225 final int taskId = task.taskId; 2226 final String taskAffinity = task.affinity; 2227 2228 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2229 final int numActivities = activities.size(); 2230 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2231 2232 // Do not operate on or below the effective root Activity. 2233 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2234 ActivityRecord target = activities.get(i); 2235 if (target.frontOfTask) 2236 break; 2237 2238 final int flags = target.info.flags; 2239 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2240 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2241 2242 if (target.resultTo != null) { 2243 // If this activity is sending a reply to a previous 2244 // activity, we can't do anything with it now until 2245 // we reach the start of the reply chain. 2246 // XXX note that we are assuming the result is always 2247 // to the previous activity, which is almost always 2248 // the case but we really shouldn't count on. 2249 if (replyChainEnd < 0) { 2250 replyChainEnd = i; 2251 } 2252 } else if (topTaskIsHigher 2253 && allowTaskReparenting 2254 && taskAffinity != null 2255 && taskAffinity.equals(target.taskAffinity)) { 2256 // This activity has an affinity for our task. Either remove it if we are 2257 // clearing or move it over to our task. Note that 2258 // we currently punt on the case where we are resetting a 2259 // task that is not at the top but who has activities above 2260 // with an affinity to it... this is really not a normal 2261 // case, and we will need to later pull that task to the front 2262 // and usually at that point we will do the reset and pick 2263 // up those remaining activities. (This only happens if 2264 // someone starts an activity in a new task from an activity 2265 // in a task that is not currently on top.) 2266 if (forceReset || finishOnTaskLaunch) { 2267 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2268 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2269 for (int srcPos = start; srcPos >= i; --srcPos) { 2270 final ActivityRecord p = activities.get(srcPos); 2271 if (p.finishing) { 2272 continue; 2273 } 2274 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2275 } 2276 } else { 2277 if (taskInsertionPoint < 0) { 2278 taskInsertionPoint = task.mActivities.size(); 2279 2280 } 2281 2282 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2283 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2284 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2285 for (int srcPos = start; srcPos >= i; --srcPos) { 2286 final ActivityRecord p = activities.get(srcPos); 2287 p.setTask(task, null); 2288 task.addActivityAtIndex(taskInsertionPoint, p); 2289 2290 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2291 + " to stack at " + task, 2292 new RuntimeException("here").fillInStackTrace()); 2293 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2294 + " in to resetting task " + task); 2295 mWindowManager.setAppGroupId(p.appToken, taskId); 2296 } 2297 mWindowManager.moveTaskToTop(taskId); 2298 if (VALIDATE_TOKENS) { 2299 validateAppTokensLocked(); 2300 } 2301 2302 // Now we've moved it in to place... but what if this is 2303 // a singleTop activity and we have put it on top of another 2304 // instance of the same activity? Then we drop the instance 2305 // below so it remains singleTop. 2306 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2307 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2308 int targetNdx = taskActivities.indexOf(target); 2309 if (targetNdx > 0) { 2310 ActivityRecord p = taskActivities.get(targetNdx - 1); 2311 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2312 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2313 false); 2314 } 2315 } 2316 } 2317 } 2318 2319 replyChainEnd = -1; 2320 } 2321 } 2322 return taskInsertionPoint; 2323 } 2324 2325 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2326 ActivityRecord newActivity) { 2327 boolean forceReset = 2328 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2329 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2330 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2331 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2332 forceReset = true; 2333 } 2334 } 2335 2336 final TaskRecord task = taskTop.task; 2337 2338 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2339 * for remaining tasks. Used for later tasks to reparent to task. */ 2340 boolean taskFound = false; 2341 2342 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2343 ActivityOptions topOptions = null; 2344 2345 // Preserve the location for reparenting in the new task. 2346 int reparentInsertionPoint = -1; 2347 2348 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2349 final TaskRecord targetTask = mTaskHistory.get(i); 2350 2351 if (targetTask == task) { 2352 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2353 taskFound = true; 2354 } else { 2355 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2356 taskFound, forceReset, reparentInsertionPoint); 2357 } 2358 } 2359 2360 int taskNdx = mTaskHistory.indexOf(task); 2361 do { 2362 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2363 } while (taskTop == null && taskNdx >= 0); 2364 2365 if (topOptions != null) { 2366 // If we got some ActivityOptions from an activity on top that 2367 // was removed from the task, propagate them to the new real top. 2368 if (taskTop != null) { 2369 taskTop.updateOptionsLocked(topOptions); 2370 } else { 2371 topOptions.abort(); 2372 } 2373 } 2374 2375 return taskTop; 2376 } 2377 2378 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2379 String resultWho, int requestCode, int resultCode, Intent data) { 2380 2381 if (callingUid > 0) { 2382 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2383 data, r.getUriPermissionsLocked(), r.userId); 2384 } 2385 2386 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2387 + " : who=" + resultWho + " req=" + requestCode 2388 + " res=" + resultCode + " data=" + data); 2389 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2390 try { 2391 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2392 list.add(new ResultInfo(resultWho, requestCode, 2393 resultCode, data)); 2394 r.app.thread.scheduleSendResult(r.appToken, list); 2395 return; 2396 } catch (Exception e) { 2397 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2398 } 2399 } 2400 2401 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2402 } 2403 2404 private void adjustFocusedActivityLocked(ActivityRecord r) { 2405 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2406 ActivityRecord next = topRunningActivityLocked(null); 2407 if (next != r) { 2408 final TaskRecord task = r.task; 2409 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2410 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2411 } 2412 } 2413 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2414 if (top != null) { 2415 mService.setFocusedActivityLocked(top); 2416 } 2417 } 2418 } 2419 2420 final void stopActivityLocked(ActivityRecord r) { 2421 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2422 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2423 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2424 if (!r.finishing) { 2425 if (!mService.isSleeping()) { 2426 if (DEBUG_STATES) { 2427 Slog.d(TAG, "no-history finish of " + r); 2428 } 2429 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2430 "no-history", false); 2431 } else { 2432 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2433 + " on stop because we're just sleeping"); 2434 } 2435 } 2436 } 2437 2438 if (r.app != null && r.app.thread != null) { 2439 adjustFocusedActivityLocked(r); 2440 r.resumeKeyDispatchingLocked(); 2441 try { 2442 r.stopped = false; 2443 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2444 + " (stop requested)"); 2445 r.state = ActivityState.STOPPING; 2446 if (DEBUG_VISBILITY) Slog.v( 2447 TAG, "Stopping visible=" + r.visible + " for " + r); 2448 if (!r.visible) { 2449 mWindowManager.setAppVisibility(r.appToken, false); 2450 } 2451 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2452 if (mService.isSleepingOrShuttingDown()) { 2453 r.setSleeping(true); 2454 } 2455 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2456 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2457 } catch (Exception e) { 2458 // Maybe just ignore exceptions here... if the process 2459 // has crashed, our death notification will clean things 2460 // up. 2461 Slog.w(TAG, "Exception thrown during pause", e); 2462 // Just in case, assume it to be stopped. 2463 r.stopped = true; 2464 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2465 r.state = ActivityState.STOPPED; 2466 if (r.configDestroy) { 2467 destroyActivityLocked(r, true, "stop-except"); 2468 } 2469 } 2470 } 2471 } 2472 2473 /** 2474 * @return Returns true if the activity is being finished, false if for 2475 * some reason it is being left as-is. 2476 */ 2477 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2478 Intent resultData, String reason, boolean oomAdj) { 2479 ActivityRecord r = isInStackLocked(token); 2480 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2481 TAG, "Finishing activity token=" + token + " r=" 2482 + ", result=" + resultCode + ", data=" + resultData 2483 + ", reason=" + reason); 2484 if (r == null) { 2485 return false; 2486 } 2487 2488 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2489 return true; 2490 } 2491 2492 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2493 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2494 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2495 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2496 ActivityRecord r = activities.get(activityNdx); 2497 if (r.resultTo == self && r.requestCode == requestCode) { 2498 if ((r.resultWho == null && resultWho == null) || 2499 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2500 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2501 false); 2502 } 2503 } 2504 } 2505 } 2506 mService.updateOomAdjLocked(); 2507 } 2508 2509 final void finishTopRunningActivityLocked(ProcessRecord app) { 2510 ActivityRecord r = topRunningActivityLocked(null); 2511 if (r != null && r.app == app) { 2512 // If the top running activity is from this crashing 2513 // process, then terminate it to avoid getting in a loop. 2514 Slog.w(TAG, " Force finishing activity " 2515 + r.intent.getComponent().flattenToShortString()); 2516 int taskNdx = mTaskHistory.indexOf(r.task); 2517 int activityNdx = r.task.mActivities.indexOf(r); 2518 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2519 // Also terminate any activities below it that aren't yet 2520 // stopped, to avoid a situation where one will get 2521 // re-start our crashing activity once it gets resumed again. 2522 --activityNdx; 2523 if (activityNdx < 0) { 2524 do { 2525 --taskNdx; 2526 if (taskNdx < 0) { 2527 break; 2528 } 2529 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2530 } while (activityNdx < 0); 2531 } 2532 if (activityNdx >= 0) { 2533 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2534 if (r.state == ActivityState.RESUMED 2535 || r.state == ActivityState.PAUSING 2536 || r.state == ActivityState.PAUSED) { 2537 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2538 Slog.w(TAG, " Force finishing activity " 2539 + r.intent.getComponent().flattenToShortString()); 2540 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2541 } 2542 } 2543 } 2544 } 2545 } 2546 2547 final void finishVoiceTask(IVoiceInteractionSession session) { 2548 IBinder sessionBinder = session.asBinder(); 2549 boolean didOne = false; 2550 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2551 TaskRecord tr = mTaskHistory.get(taskNdx); 2552 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2553 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2554 ActivityRecord r = tr.mActivities.get(activityNdx); 2555 if (!r.finishing) { 2556 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2557 false); 2558 didOne = true; 2559 } 2560 } 2561 } 2562 } 2563 if (didOne) { 2564 mService.updateOomAdjLocked(); 2565 } 2566 } 2567 2568 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2569 ArrayList<ActivityRecord> activities = r.task.mActivities; 2570 for (int index = activities.indexOf(r); index >= 0; --index) { 2571 ActivityRecord cur = activities.get(index); 2572 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2573 break; 2574 } 2575 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2576 } 2577 return true; 2578 } 2579 2580 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2581 // send the result 2582 ActivityRecord resultTo = r.resultTo; 2583 if (resultTo != null) { 2584 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2585 + " who=" + r.resultWho + " req=" + r.requestCode 2586 + " res=" + resultCode + " data=" + resultData); 2587 if (resultTo.userId != r.userId) { 2588 if (resultData != null) { 2589 resultData.setContentUserHint(r.userId); 2590 } 2591 } 2592 if (r.info.applicationInfo.uid > 0) { 2593 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2594 resultTo.packageName, resultData, 2595 resultTo.getUriPermissionsLocked(), resultTo.userId); 2596 } 2597 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2598 resultData); 2599 r.resultTo = null; 2600 } 2601 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2602 2603 // Make sure this HistoryRecord is not holding on to other resources, 2604 // because clients have remote IPC references to this object so we 2605 // can't assume that will go away and want to avoid circular IPC refs. 2606 r.results = null; 2607 r.pendingResults = null; 2608 r.newIntents = null; 2609 r.icicle = null; 2610 } 2611 2612 /** 2613 * @return Returns true if this activity has been removed from the history 2614 * list, or false if it is still in the list and will be removed later. 2615 */ 2616 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2617 String reason, boolean oomAdj) { 2618 if (r.finishing) { 2619 Slog.w(TAG, "Duplicate finish request for " + r); 2620 return false; 2621 } 2622 2623 r.makeFinishing(); 2624 final TaskRecord task = r.task; 2625 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2626 r.userId, System.identityHashCode(r), 2627 task.taskId, r.shortComponentName, reason); 2628 final ArrayList<ActivityRecord> activities = task.mActivities; 2629 final int index = activities.indexOf(r); 2630 if (index < (activities.size() - 1)) { 2631 task.setFrontOfTask(); 2632 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2633 // If the caller asked that this activity (and all above it) 2634 // be cleared when the task is reset, don't lose that information, 2635 // but propagate it up to the next activity. 2636 ActivityRecord next = activities.get(index+1); 2637 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2638 } 2639 } 2640 2641 r.pauseKeyDispatchingLocked(); 2642 2643 adjustFocusedActivityLocked(r); 2644 2645 finishActivityResultsLocked(r, resultCode, resultData); 2646 2647 if (mResumedActivity == r) { 2648 boolean endTask = index <= 0; 2649 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2650 "Prepare close transition: finishing " + r); 2651 mWindowManager.prepareAppTransition(endTask 2652 ? AppTransition.TRANSIT_TASK_CLOSE 2653 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2654 2655 // Tell window manager to prepare for this one to be removed. 2656 mWindowManager.setAppVisibility(r.appToken, false); 2657 2658 if (mPausingActivity == null) { 2659 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2660 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2661 startPausingLocked(false, false); 2662 } 2663 2664 if (endTask) { 2665 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2666 } 2667 } else if (r.state != ActivityState.PAUSING) { 2668 // If the activity is PAUSING, we will complete the finish once 2669 // it is done pausing; else we can just directly finish it here. 2670 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2671 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2672 } else { 2673 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2674 } 2675 2676 return false; 2677 } 2678 2679 static final int FINISH_IMMEDIATELY = 0; 2680 static final int FINISH_AFTER_PAUSE = 1; 2681 static final int FINISH_AFTER_VISIBLE = 2; 2682 2683 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2684 // First things first: if this activity is currently visible, 2685 // and the resumed activity is not yet visible, then hold off on 2686 // finishing until the resumed one becomes visible. 2687 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2688 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2689 mStackSupervisor.mStoppingActivities.add(r); 2690 if (mStackSupervisor.mStoppingActivities.size() > 3 2691 || r.frontOfTask && mTaskHistory.size() <= 1) { 2692 // If we already have a few activities waiting to stop, 2693 // then give up on things going idle and start clearing 2694 // them out. Or if r is the last of activity of the last task the stack 2695 // will be empty and must be cleared immediately. 2696 mStackSupervisor.scheduleIdleLocked(); 2697 } else { 2698 mStackSupervisor.checkReadyForSleepLocked(); 2699 } 2700 } 2701 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2702 + " (finish requested)"); 2703 r.state = ActivityState.STOPPING; 2704 if (oomAdj) { 2705 mService.updateOomAdjLocked(); 2706 } 2707 return r; 2708 } 2709 2710 // make sure the record is cleaned out of other places. 2711 mStackSupervisor.mStoppingActivities.remove(r); 2712 mStackSupervisor.mGoingToSleepActivities.remove(r); 2713 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2714 if (mResumedActivity == r) { 2715 mResumedActivity = null; 2716 } 2717 final ActivityState prevState = r.state; 2718 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2719 r.state = ActivityState.FINISHING; 2720 2721 if (mode == FINISH_IMMEDIATELY 2722 || prevState == ActivityState.STOPPED 2723 || prevState == ActivityState.INITIALIZING) { 2724 // If this activity is already stopped, we can just finish 2725 // it right now. 2726 r.makeFinishing(); 2727 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2728 if (activityRemoved) { 2729 mStackSupervisor.resumeTopActivitiesLocked(); 2730 } 2731 if (DEBUG_CONTAINERS) Slog.d(TAG, 2732 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2733 " destroy returned removed=" + activityRemoved); 2734 return activityRemoved ? null : r; 2735 } 2736 2737 // Need to go through the full pause cycle to get this 2738 // activity into the stopped state and then finish it. 2739 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2740 mStackSupervisor.mFinishingActivities.add(r); 2741 r.resumeKeyDispatchingLocked(); 2742 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2743 return r; 2744 } 2745 2746 void finishAllActivitiesLocked(boolean immediately) { 2747 boolean noActivitiesInStack = true; 2748 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2749 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2750 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2751 final ActivityRecord r = activities.get(activityNdx); 2752 noActivitiesInStack = false; 2753 if (r.finishing && !immediately) { 2754 continue; 2755 } 2756 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2757 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2758 } 2759 } 2760 if (noActivitiesInStack) { 2761 mActivityContainer.onTaskListEmptyLocked(); 2762 } 2763 } 2764 2765 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2766 Intent resultData) { 2767 final ActivityRecord srec = ActivityRecord.forToken(token); 2768 final TaskRecord task = srec.task; 2769 final ArrayList<ActivityRecord> activities = task.mActivities; 2770 final int start = activities.indexOf(srec); 2771 if (!mTaskHistory.contains(task) || (start < 0)) { 2772 return false; 2773 } 2774 int finishTo = start - 1; 2775 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2776 boolean foundParentInTask = false; 2777 final ComponentName dest = destIntent.getComponent(); 2778 if (start > 0 && dest != null) { 2779 for (int i = finishTo; i >= 0; i--) { 2780 ActivityRecord r = activities.get(i); 2781 if (r.info.packageName.equals(dest.getPackageName()) && 2782 r.info.name.equals(dest.getClassName())) { 2783 finishTo = i; 2784 parent = r; 2785 foundParentInTask = true; 2786 break; 2787 } 2788 } 2789 } 2790 2791 IActivityController controller = mService.mController; 2792 if (controller != null) { 2793 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2794 if (next != null) { 2795 // ask watcher if this is allowed 2796 boolean resumeOK = true; 2797 try { 2798 resumeOK = controller.activityResuming(next.packageName); 2799 } catch (RemoteException e) { 2800 mService.mController = null; 2801 Watchdog.getInstance().setActivityController(null); 2802 } 2803 2804 if (!resumeOK) { 2805 return false; 2806 } 2807 } 2808 } 2809 final long origId = Binder.clearCallingIdentity(); 2810 for (int i = start; i > finishTo; i--) { 2811 ActivityRecord r = activities.get(i); 2812 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2813 // Only return the supplied result for the first activity finished 2814 resultCode = Activity.RESULT_CANCELED; 2815 resultData = null; 2816 } 2817 2818 if (parent != null && foundParentInTask) { 2819 final int parentLaunchMode = parent.info.launchMode; 2820 final int destIntentFlags = destIntent.getFlags(); 2821 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2822 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2823 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2824 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2825 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2826 } else { 2827 try { 2828 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2829 destIntent.getComponent(), 0, srec.userId); 2830 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2831 null, aInfo, null, null, parent.appToken, null, 2832 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2833 0, null, true, null, null); 2834 foundParentInTask = res == ActivityManager.START_SUCCESS; 2835 } catch (RemoteException e) { 2836 foundParentInTask = false; 2837 } 2838 requestFinishActivityLocked(parent.appToken, resultCode, 2839 resultData, "navigate-up", true); 2840 } 2841 } 2842 Binder.restoreCallingIdentity(origId); 2843 return foundParentInTask; 2844 } 2845 /** 2846 * Perform the common clean-up of an activity record. This is called both 2847 * as part of destroyActivityLocked() (when destroying the client-side 2848 * representation) and cleaning things up as a result of its hosting 2849 * processing going away, in which case there is no remaining client-side 2850 * state to destroy so only the cleanup here is needed. 2851 */ 2852 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2853 boolean setState) { 2854 if (mResumedActivity == r) { 2855 mResumedActivity = null; 2856 } 2857 if (mPausingActivity == r) { 2858 mPausingActivity = null; 2859 } 2860 mService.clearFocusedActivity(r); 2861 2862 r.configDestroy = false; 2863 r.frozenBeforeDestroy = false; 2864 2865 if (setState) { 2866 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2867 r.state = ActivityState.DESTROYED; 2868 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2869 r.app = null; 2870 } 2871 2872 // Make sure this record is no longer in the pending finishes list. 2873 // This could happen, for example, if we are trimming activities 2874 // down to the max limit while they are still waiting to finish. 2875 mStackSupervisor.mFinishingActivities.remove(r); 2876 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2877 2878 // Remove any pending results. 2879 if (r.finishing && r.pendingResults != null) { 2880 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2881 PendingIntentRecord rec = apr.get(); 2882 if (rec != null) { 2883 mService.cancelIntentSenderLocked(rec, false); 2884 } 2885 } 2886 r.pendingResults = null; 2887 } 2888 2889 if (cleanServices) { 2890 cleanUpActivityServicesLocked(r); 2891 } 2892 2893 // Get rid of any pending idle timeouts. 2894 removeTimeoutsForActivityLocked(r); 2895 if (getMediaPlayer() == r) { 2896 mStackSupervisor.setMediaPlayingLocked(r, false); 2897 } 2898 } 2899 2900 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2901 mStackSupervisor.removeTimeoutsForActivityLocked(r); 2902 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 2903 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 2904 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2905 r.finishLaunchTickingLocked(); 2906 } 2907 2908 private void removeActivityFromHistoryLocked(ActivityRecord r) { 2909 mStackSupervisor.removeChildActivityContainers(r); 2910 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 2911 r.makeFinishing(); 2912 if (DEBUG_ADD_REMOVE) { 2913 RuntimeException here = new RuntimeException("here"); 2914 here.fillInStackTrace(); 2915 Slog.i(TAG, "Removing activity " + r + " from stack"); 2916 } 2917 r.takeFromHistory(); 2918 removeTimeoutsForActivityLocked(r); 2919 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 2920 r.state = ActivityState.DESTROYED; 2921 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 2922 r.app = null; 2923 mWindowManager.removeAppToken(r.appToken); 2924 if (VALIDATE_TOKENS) { 2925 validateAppTokensLocked(); 2926 } 2927 final TaskRecord task = r.task; 2928 if (task != null && task.removeActivity(r)) { 2929 if (DEBUG_STACK) Slog.i(TAG, 2930 "removeActivityFromHistoryLocked: last activity removed from " + this); 2931 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 2932 task.isOverHomeStack()) { 2933 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2934 } 2935 removeTask(task); 2936 } 2937 cleanUpActivityServicesLocked(r); 2938 r.removeUriPermissionsLocked(); 2939 } 2940 2941 /** 2942 * Perform clean-up of service connections in an activity record. 2943 */ 2944 final void cleanUpActivityServicesLocked(ActivityRecord r) { 2945 // Throw away any services that have been bound by this activity. 2946 if (r.connections != null) { 2947 Iterator<ConnectionRecord> it = r.connections.iterator(); 2948 while (it.hasNext()) { 2949 ConnectionRecord c = it.next(); 2950 mService.mServices.removeConnectionLocked(c, null, r); 2951 } 2952 r.connections = null; 2953 } 2954 } 2955 2956 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 2957 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 2958 msg.obj = new ScheduleDestroyArgs(owner, reason); 2959 mHandler.sendMessage(msg); 2960 } 2961 2962 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 2963 boolean lastIsOpaque = false; 2964 boolean activityRemoved = false; 2965 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2966 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2967 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2968 final ActivityRecord r = activities.get(activityNdx); 2969 if (r.finishing) { 2970 continue; 2971 } 2972 if (r.fullscreen) { 2973 lastIsOpaque = true; 2974 } 2975 if (owner != null && r.app != owner) { 2976 continue; 2977 } 2978 if (!lastIsOpaque) { 2979 continue; 2980 } 2981 // We can destroy this one if we have its icicle saved and 2982 // it is not in the process of pausing/stopping/finishing. 2983 if (r.app != null && r != mResumedActivity && r != mPausingActivity 2984 && r.haveState && !r.visible && r.stopped 2985 && r.state != ActivityState.DESTROYING 2986 && r.state != ActivityState.DESTROYED) { 2987 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 2988 + " resumed=" + mResumedActivity 2989 + " pausing=" + mPausingActivity); 2990 if (destroyActivityLocked(r, true, reason)) { 2991 activityRemoved = true; 2992 } 2993 } 2994 } 2995 } 2996 if (activityRemoved) { 2997 mStackSupervisor.resumeTopActivitiesLocked(); 2998 } 2999 } 3000 3001 /** 3002 * Destroy the current CLIENT SIDE instance of an activity. This may be 3003 * called both when actually finishing an activity, or when performing 3004 * a configuration switch where we destroy the current client-side object 3005 * but then create a new client-side object for this same HistoryRecord. 3006 */ 3007 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3008 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3009 TAG, "Removing activity from " + reason + ": token=" + r 3010 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3011 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3012 r.userId, System.identityHashCode(r), 3013 r.task.taskId, r.shortComponentName, reason); 3014 3015 boolean removedFromHistory = false; 3016 3017 cleanUpActivityLocked(r, false, false); 3018 3019 final boolean hadApp = r.app != null; 3020 3021 if (hadApp) { 3022 if (removeFromApp) { 3023 r.app.activities.remove(r); 3024 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3025 mService.mHeavyWeightProcess = null; 3026 mService.mHandler.sendEmptyMessage( 3027 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3028 } 3029 if (r.app.activities.isEmpty()) { 3030 // No longer have activities, so update LRU list and oom adj. 3031 mService.updateLruProcessLocked(r.app, false, null); 3032 mService.updateOomAdjLocked(); 3033 } 3034 } 3035 3036 boolean skipDestroy = false; 3037 3038 try { 3039 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3040 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3041 r.configChangeFlags); 3042 } catch (Exception e) { 3043 // We can just ignore exceptions here... if the process 3044 // has crashed, our death notification will clean things 3045 // up. 3046 //Slog.w(TAG, "Exception thrown during finish", e); 3047 if (r.finishing) { 3048 removeActivityFromHistoryLocked(r); 3049 removedFromHistory = true; 3050 skipDestroy = true; 3051 } 3052 } 3053 3054 r.nowVisible = false; 3055 3056 // If the activity is finishing, we need to wait on removing it 3057 // from the list to give it a chance to do its cleanup. During 3058 // that time it may make calls back with its token so we need to 3059 // be able to find it on the list and so we don't want to remove 3060 // it from the list yet. Otherwise, we can just immediately put 3061 // it in the destroyed state since we are not removing it from the 3062 // list. 3063 if (r.finishing && !skipDestroy) { 3064 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3065 + " (destroy requested)"); 3066 r.state = ActivityState.DESTROYING; 3067 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3068 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3069 } else { 3070 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3071 r.state = ActivityState.DESTROYED; 3072 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3073 r.app = null; 3074 } 3075 } else { 3076 // remove this record from the history. 3077 if (r.finishing) { 3078 removeActivityFromHistoryLocked(r); 3079 removedFromHistory = true; 3080 } else { 3081 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3082 r.state = ActivityState.DESTROYED; 3083 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3084 r.app = null; 3085 } 3086 } 3087 3088 r.configChangeFlags = 0; 3089 3090 if (!mLRUActivities.remove(r) && hadApp) { 3091 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3092 } 3093 3094 return removedFromHistory; 3095 } 3096 3097 final void activityDestroyedLocked(IBinder token) { 3098 final long origId = Binder.clearCallingIdentity(); 3099 try { 3100 ActivityRecord r = ActivityRecord.forToken(token); 3101 if (r != null) { 3102 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3103 } 3104 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3105 3106 if (isInStackLocked(token) != null) { 3107 if (r.state == ActivityState.DESTROYING) { 3108 cleanUpActivityLocked(r, true, false); 3109 removeActivityFromHistoryLocked(r); 3110 } 3111 } 3112 mStackSupervisor.resumeTopActivitiesLocked(); 3113 } finally { 3114 Binder.restoreCallingIdentity(origId); 3115 } 3116 } 3117 3118 void releaseMediaResources() { 3119 if (isMediaPlaying() && !mHandler.hasMessages(STOP_MEDIA_PLAYING_TIMEOUT_MSG)) { 3120 final ActivityRecord r = getMediaPlayer(); 3121 if (DEBUG_STATES) Slog.d(TAG, "releaseMediaResources activtyDisplay=" + 3122 mActivityContainer.mActivityDisplay + " mediaPlayer=" + r + " app=" + r.app + 3123 " thread=" + r.app.thread); 3124 if (r != null && r.app != null && r.app.thread != null) { 3125 try { 3126 r.app.thread.scheduleStopMediaPlaying(r.appToken); 3127 } catch (RemoteException e) { 3128 } 3129 mHandler.sendEmptyMessageDelayed(STOP_MEDIA_PLAYING_TIMEOUT_MSG, 500); 3130 } else { 3131 Slog.e(TAG, "releaseMediaResources: activity " + r + " no longer running"); 3132 mediaResourcesReleased(r.appToken); 3133 } 3134 } 3135 } 3136 3137 final void mediaResourcesReleased(IBinder token) { 3138 mHandler.removeMessages(STOP_MEDIA_PLAYING_TIMEOUT_MSG); 3139 final ActivityRecord r = getMediaPlayer(); 3140 if (r != null) { 3141 mStackSupervisor.mStoppingActivities.add(r); 3142 setMediaPlayer(null); 3143 } 3144 mStackSupervisor.resumeTopActivitiesLocked(); 3145 } 3146 3147 boolean isMediaPlaying() { 3148 return isAttached() && mActivityContainer.mActivityDisplay.isMediaPlaying(); 3149 } 3150 3151 void setMediaPlayer(ActivityRecord r) { 3152 if (isAttached()) { 3153 mActivityContainer.mActivityDisplay.setMediaPlaying(r); 3154 } 3155 } 3156 3157 ActivityRecord getMediaPlayer() { 3158 return isAttached() ? mActivityContainer.mActivityDisplay.mMediaPlayingActivity : null; 3159 } 3160 3161 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3162 ProcessRecord app, String listName) { 3163 int i = list.size(); 3164 if (DEBUG_CLEANUP) Slog.v( 3165 TAG, "Removing app " + app + " from list " + listName 3166 + " with " + i + " entries"); 3167 while (i > 0) { 3168 i--; 3169 ActivityRecord r = list.get(i); 3170 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3171 if (r.app == app) { 3172 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3173 list.remove(i); 3174 removeTimeoutsForActivityLocked(r); 3175 } 3176 } 3177 } 3178 3179 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3180 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3181 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3182 "mStoppingActivities"); 3183 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3184 "mGoingToSleepActivities"); 3185 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3186 "mWaitingVisibleActivities"); 3187 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3188 "mFinishingActivities"); 3189 3190 boolean hasVisibleActivities = false; 3191 3192 // Clean out the history list. 3193 int i = numActivities(); 3194 if (DEBUG_CLEANUP) Slog.v( 3195 TAG, "Removing app " + app + " from history with " + i + " entries"); 3196 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3197 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3198 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3199 final ActivityRecord r = activities.get(activityNdx); 3200 --i; 3201 if (DEBUG_CLEANUP) Slog.v( 3202 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3203 if (r.app == app) { 3204 boolean remove; 3205 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3206 // Don't currently have state for the activity, or 3207 // it is finishing -- always remove it. 3208 remove = true; 3209 } else if (r.launchCount > 2 && 3210 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3211 // We have launched this activity too many times since it was 3212 // able to run, so give up and remove it. 3213 remove = true; 3214 } else { 3215 // The process may be gone, but the activity lives on! 3216 remove = false; 3217 } 3218 if (remove) { 3219 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3220 RuntimeException here = new RuntimeException("here"); 3221 here.fillInStackTrace(); 3222 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3223 + ": haveState=" + r.haveState 3224 + " stateNotNeeded=" + r.stateNotNeeded 3225 + " finishing=" + r.finishing 3226 + " state=" + r.state, here); 3227 } 3228 if (!r.finishing) { 3229 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3230 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3231 r.userId, System.identityHashCode(r), 3232 r.task.taskId, r.shortComponentName, 3233 "proc died without state saved"); 3234 if (r.state == ActivityState.RESUMED) { 3235 mService.updateUsageStats(r, false); 3236 } 3237 } 3238 removeActivityFromHistoryLocked(r); 3239 3240 } else { 3241 // We have the current state for this activity, so 3242 // it can be restarted later when needed. 3243 if (localLOGV) Slog.v( 3244 TAG, "Keeping entry, setting app to null"); 3245 if (r.visible) { 3246 hasVisibleActivities = true; 3247 } 3248 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3249 + r); 3250 r.app = null; 3251 r.nowVisible = false; 3252 if (!r.haveState) { 3253 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3254 "App died, clearing saved state of " + r); 3255 r.icicle = null; 3256 } 3257 } 3258 3259 cleanUpActivityLocked(r, true, true); 3260 } 3261 } 3262 } 3263 3264 return hasVisibleActivities; 3265 } 3266 3267 final void updateTransitLocked(int transit, Bundle options) { 3268 if (options != null) { 3269 ActivityRecord r = topRunningActivityLocked(null); 3270 if (r != null && r.state != ActivityState.RESUMED) { 3271 r.updateOptionsLocked(options); 3272 } else { 3273 ActivityOptions.abort(options); 3274 } 3275 } 3276 mWindowManager.prepareAppTransition(transit, false); 3277 } 3278 3279 void updateTaskMovement(TaskRecord task, boolean toFront) { 3280 if (task.isPersistable) { 3281 task.mLastTimeMoved = System.currentTimeMillis(); 3282 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3283 // recently will be most negative, tasks sent to the bottom before that will be less 3284 // negative. Similarly for recent tasks moved to the top which will be most positive. 3285 if (!toFront) { 3286 task.mLastTimeMoved *= -1; 3287 } 3288 } 3289 } 3290 3291 void moveHomeStackTaskToTop(int homeStackTaskType) { 3292 final int top = mTaskHistory.size() - 1; 3293 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3294 final TaskRecord task = mTaskHistory.get(taskNdx); 3295 if (task.taskType == homeStackTaskType) { 3296 if (DEBUG_TASKS || DEBUG_STACK) 3297 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3298 mTaskHistory.remove(taskNdx); 3299 mTaskHistory.add(top, task); 3300 updateTaskMovement(task, true); 3301 mWindowManager.moveTaskToTop(task.taskId); 3302 return; 3303 } 3304 } 3305 } 3306 3307 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3308 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3309 3310 final int numTasks = mTaskHistory.size(); 3311 final int index = mTaskHistory.indexOf(tr); 3312 if (numTasks == 0 || index < 0) { 3313 // nothing to do! 3314 if (reason != null && 3315 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3316 ActivityOptions.abort(options); 3317 } else { 3318 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3319 } 3320 return; 3321 } 3322 3323 moveToFront(); 3324 3325 // Shift all activities with this task up to the top 3326 // of the stack, keeping them in the same internal order. 3327 insertTaskAtTop(tr); 3328 3329 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3330 if (reason != null && 3331 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3332 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3333 ActivityRecord r = topRunningActivityLocked(null); 3334 if (r != null) { 3335 mNoAnimActivities.add(r); 3336 } 3337 ActivityOptions.abort(options); 3338 } else { 3339 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3340 } 3341 3342 mWindowManager.moveTaskToTop(tr.taskId); 3343 3344 mStackSupervisor.resumeTopActivitiesLocked(); 3345 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3346 3347 if (VALIDATE_TOKENS) { 3348 validateAppTokensLocked(); 3349 } 3350 } 3351 3352 /** 3353 * Worker method for rearranging history stack. Implements the function of moving all 3354 * activities for a specific task (gathering them if disjoint) into a single group at the 3355 * bottom of the stack. 3356 * 3357 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3358 * to premeptively cancel the move. 3359 * 3360 * @param taskId The taskId to collect and move to the bottom. 3361 * @return Returns true if the move completed, false if not. 3362 */ 3363 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3364 final TaskRecord tr = taskForIdLocked(taskId); 3365 if (tr == null) { 3366 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3367 return false; 3368 } 3369 3370 Slog.i(TAG, "moveTaskToBack: " + tr); 3371 3372 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3373 3374 // If we have a watcher, preflight the move before committing to it. First check 3375 // for *other* available tasks, but if none are available, then try again allowing the 3376 // current task to be selected. 3377 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3378 ActivityRecord next = topRunningActivityLocked(null, taskId); 3379 if (next == null) { 3380 next = topRunningActivityLocked(null, 0); 3381 } 3382 if (next != null) { 3383 // ask watcher if this is allowed 3384 boolean moveOK = true; 3385 try { 3386 moveOK = mService.mController.activityResuming(next.packageName); 3387 } catch (RemoteException e) { 3388 mService.mController = null; 3389 Watchdog.getInstance().setActivityController(null); 3390 } 3391 if (!moveOK) { 3392 return false; 3393 } 3394 } 3395 } 3396 3397 if (DEBUG_TRANSITION) Slog.v(TAG, 3398 "Prepare to back transition: task=" + taskId); 3399 3400 mTaskHistory.remove(tr); 3401 mTaskHistory.add(0, tr); 3402 updateTaskMovement(tr, false); 3403 3404 // There is an assumption that moving a task to the back moves it behind the home activity. 3405 // We make sure here that some activity in the stack will launch home. 3406 int numTasks = mTaskHistory.size(); 3407 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3408 final TaskRecord task = mTaskHistory.get(taskNdx); 3409 if (task.isOverHomeStack()) { 3410 break; 3411 } 3412 if (taskNdx == 1) { 3413 // Set the last task before tr to go to home. 3414 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3415 } 3416 } 3417 3418 if (reason != null && 3419 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3420 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3421 ActivityRecord r = topRunningActivityLocked(null); 3422 if (r != null) { 3423 mNoAnimActivities.add(r); 3424 } 3425 } else { 3426 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3427 } 3428 mWindowManager.moveTaskToBottom(taskId); 3429 3430 if (VALIDATE_TOKENS) { 3431 validateAppTokensLocked(); 3432 } 3433 3434 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3435 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3436 final int taskToReturnTo = tr.getTaskToReturnTo(); 3437 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3438 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3439 } 3440 3441 mStackSupervisor.resumeTopActivitiesLocked(); 3442 return true; 3443 } 3444 3445 static final void logStartActivity(int tag, ActivityRecord r, 3446 TaskRecord task) { 3447 final Uri data = r.intent.getData(); 3448 final String strData = data != null ? data.toSafeString() : null; 3449 3450 EventLog.writeEvent(tag, 3451 r.userId, System.identityHashCode(r), task.taskId, 3452 r.shortComponentName, r.intent.getAction(), 3453 r.intent.getType(), strData, r.intent.getFlags()); 3454 } 3455 3456 /** 3457 * Make sure the given activity matches the current configuration. Returns 3458 * false if the activity had to be destroyed. Returns true if the 3459 * configuration is the same, or the activity will remain running as-is 3460 * for whatever reason. Ensures the HistoryRecord is updated with the 3461 * correct configuration and all other bookkeeping is handled. 3462 */ 3463 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3464 int globalChanges) { 3465 if (mConfigWillChange) { 3466 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3467 "Skipping config check (will change): " + r); 3468 return true; 3469 } 3470 3471 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3472 "Ensuring correct configuration: " + r); 3473 3474 // Short circuit: if the two configurations are the exact same 3475 // object (the common case), then there is nothing to do. 3476 Configuration newConfig = mService.mConfiguration; 3477 if (r.configuration == newConfig && !r.forceNewConfig) { 3478 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3479 "Configuration unchanged in " + r); 3480 return true; 3481 } 3482 3483 // We don't worry about activities that are finishing. 3484 if (r.finishing) { 3485 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3486 "Configuration doesn't matter in finishing " + r); 3487 r.stopFreezingScreenLocked(false); 3488 return true; 3489 } 3490 3491 // Okay we now are going to make this activity have the new config. 3492 // But then we need to figure out how it needs to deal with that. 3493 Configuration oldConfig = r.configuration; 3494 r.configuration = newConfig; 3495 3496 // Determine what has changed. May be nothing, if this is a config 3497 // that has come back from the app after going idle. In that case 3498 // we just want to leave the official config object now in the 3499 // activity and do nothing else. 3500 final int changes = oldConfig.diff(newConfig); 3501 if (changes == 0 && !r.forceNewConfig) { 3502 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3503 "Configuration no differences in " + r); 3504 return true; 3505 } 3506 3507 // If the activity isn't currently running, just leave the new 3508 // configuration and it will pick that up next time it starts. 3509 if (r.app == null || r.app.thread == null) { 3510 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3511 "Configuration doesn't matter not running " + r); 3512 r.stopFreezingScreenLocked(false); 3513 r.forceNewConfig = false; 3514 return true; 3515 } 3516 3517 // Figure out how to handle the changes between the configurations. 3518 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3519 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3520 + Integer.toHexString(changes) + ", handles=0x" 3521 + Integer.toHexString(r.info.getRealConfigChanged()) 3522 + ", newConfig=" + newConfig); 3523 } 3524 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3525 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3526 r.configChangeFlags |= changes; 3527 r.startFreezingScreenLocked(r.app, globalChanges); 3528 r.forceNewConfig = false; 3529 if (r.app == null || r.app.thread == null) { 3530 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3531 "Config is destroying non-running " + r); 3532 destroyActivityLocked(r, true, "config"); 3533 } else if (r.state == ActivityState.PAUSING) { 3534 // A little annoying: we are waiting for this activity to 3535 // finish pausing. Let's not do anything now, but just 3536 // flag that it needs to be restarted when done pausing. 3537 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3538 "Config is skipping already pausing " + r); 3539 r.configDestroy = true; 3540 return true; 3541 } else if (r.state == ActivityState.RESUMED) { 3542 // Try to optimize this case: the configuration is changing 3543 // and we need to restart the top, resumed activity. 3544 // Instead of doing the normal handshaking, just say 3545 // "restart!". 3546 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3547 "Config is relaunching resumed " + r); 3548 relaunchActivityLocked(r, r.configChangeFlags, true); 3549 r.configChangeFlags = 0; 3550 } else { 3551 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3552 "Config is relaunching non-resumed " + r); 3553 relaunchActivityLocked(r, r.configChangeFlags, false); 3554 r.configChangeFlags = 0; 3555 } 3556 3557 // All done... tell the caller we weren't able to keep this 3558 // activity around. 3559 return false; 3560 } 3561 3562 // Default case: the activity can handle this new configuration, so 3563 // hand it over. Note that we don't need to give it the new 3564 // configuration, since we always send configuration changes to all 3565 // process when they happen so it can just use whatever configuration 3566 // it last got. 3567 if (r.app != null && r.app.thread != null) { 3568 try { 3569 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3570 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3571 } catch (RemoteException e) { 3572 // If process died, whatever. 3573 } 3574 } 3575 r.stopFreezingScreenLocked(false); 3576 3577 return true; 3578 } 3579 3580 private boolean relaunchActivityLocked(ActivityRecord r, 3581 int changes, boolean andResume) { 3582 List<ResultInfo> results = null; 3583 List<Intent> newIntents = null; 3584 if (andResume) { 3585 results = r.results; 3586 newIntents = r.newIntents; 3587 } 3588 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3589 + " with results=" + results + " newIntents=" + newIntents 3590 + " andResume=" + andResume); 3591 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3592 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3593 r.task.taskId, r.shortComponentName); 3594 3595 r.startFreezingScreenLocked(r.app, 0); 3596 3597 mStackSupervisor.removeChildActivityContainers(r); 3598 3599 try { 3600 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3601 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3602 + r); 3603 r.forceNewConfig = false; 3604 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3605 changes, !andResume, new Configuration(mService.mConfiguration)); 3606 // Note: don't need to call pauseIfSleepingLocked() here, because 3607 // the caller will only pass in 'andResume' if this activity is 3608 // currently resumed, which implies we aren't sleeping. 3609 } catch (RemoteException e) { 3610 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3611 } 3612 3613 if (andResume) { 3614 r.results = null; 3615 r.newIntents = null; 3616 r.state = ActivityState.RESUMED; 3617 } else { 3618 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3619 r.state = ActivityState.PAUSED; 3620 } 3621 3622 return true; 3623 } 3624 3625 boolean willActivityBeVisibleLocked(IBinder token) { 3626 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3627 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3628 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3629 final ActivityRecord r = activities.get(activityNdx); 3630 if (r.appToken == token) { 3631 return true; 3632 } 3633 if (r.fullscreen && !r.finishing) { 3634 return false; 3635 } 3636 } 3637 } 3638 final ActivityRecord r = ActivityRecord.forToken(token); 3639 if (r == null) { 3640 return false; 3641 } 3642 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3643 + " would have returned true for r=" + r); 3644 return !r.finishing; 3645 } 3646 3647 void closeSystemDialogsLocked() { 3648 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3649 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3650 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3651 final ActivityRecord r = activities.get(activityNdx); 3652 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3653 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3654 } 3655 } 3656 } 3657 } 3658 3659 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3660 boolean didSomething = false; 3661 TaskRecord lastTask = null; 3662 ComponentName homeActivity = null; 3663 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3664 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3665 int numActivities = activities.size(); 3666 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3667 ActivityRecord r = activities.get(activityNdx); 3668 final boolean samePackage = r.packageName.equals(name) 3669 || (name == null && r.userId == userId); 3670 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3671 && (samePackage || r.task == lastTask) 3672 && (r.app == null || evenPersistent || !r.app.persistent)) { 3673 if (!doit) { 3674 if (r.finishing) { 3675 // If this activity is just finishing, then it is not 3676 // interesting as far as something to stop. 3677 continue; 3678 } 3679 return true; 3680 } 3681 if (r.isHomeActivity()) { 3682 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3683 Slog.i(TAG, "Skip force-stop again " + r); 3684 continue; 3685 } else { 3686 homeActivity = r.realActivity; 3687 } 3688 } 3689 didSomething = true; 3690 Slog.i(TAG, " Force finishing activity " + r); 3691 if (samePackage) { 3692 if (r.app != null) { 3693 r.app.removed = true; 3694 } 3695 r.app = null; 3696 } 3697 lastTask = r.task; 3698 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3699 true)) { 3700 // r has been deleted from mActivities, accommodate. 3701 --numActivities; 3702 --activityNdx; 3703 } 3704 } 3705 } 3706 } 3707 return didSomething; 3708 } 3709 3710 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3711 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3712 final TaskRecord task = mTaskHistory.get(taskNdx); 3713 ActivityRecord r = null; 3714 ActivityRecord top = null; 3715 int numActivities = 0; 3716 int numRunning = 0; 3717 final ArrayList<ActivityRecord> activities = task.mActivities; 3718 if (activities.isEmpty()) { 3719 continue; 3720 } 3721 if (!allowed && !task.isHomeTask() && task.creatorUid != callingUid) { 3722 continue; 3723 } 3724 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3725 r = activities.get(activityNdx); 3726 3727 // Initialize state for next task if needed. 3728 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3729 top = r; 3730 numActivities = numRunning = 0; 3731 } 3732 3733 // Add 'r' into the current task. 3734 numActivities++; 3735 if (r.app != null && r.app.thread != null) { 3736 numRunning++; 3737 } 3738 3739 if (localLOGV) Slog.v( 3740 TAG, r.intent.getComponent().flattenToShortString() 3741 + ": task=" + r.task); 3742 } 3743 3744 RunningTaskInfo ci = new RunningTaskInfo(); 3745 ci.id = task.taskId; 3746 ci.baseActivity = r.intent.getComponent(); 3747 ci.topActivity = top.intent.getComponent(); 3748 ci.lastActiveTime = task.lastActiveTime; 3749 3750 if (top.task != null) { 3751 ci.description = top.task.lastDescription; 3752 } 3753 ci.numActivities = numActivities; 3754 ci.numRunning = numRunning; 3755 //System.out.println( 3756 // "#" + maxNum + ": " + " descr=" + ci.description); 3757 list.add(ci); 3758 } 3759 } 3760 3761 public void unhandledBackLocked() { 3762 final int top = mTaskHistory.size() - 1; 3763 if (DEBUG_SWITCH) Slog.d( 3764 TAG, "Performing unhandledBack(): top activity at " + top); 3765 if (top >= 0) { 3766 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3767 int activityTop = activities.size() - 1; 3768 if (activityTop > 0) { 3769 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3770 "unhandled-back", true); 3771 } 3772 } 3773 } 3774 3775 /** 3776 * Reset local parameters because an app's activity died. 3777 * @param app The app of the activity that died. 3778 * @return result from removeHistoryRecordsForAppLocked. 3779 */ 3780 boolean handleAppDiedLocked(ProcessRecord app) { 3781 if (mPausingActivity != null && mPausingActivity.app == app) { 3782 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3783 "App died while pausing: " + mPausingActivity); 3784 mPausingActivity = null; 3785 } 3786 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3787 mLastPausedActivity = null; 3788 mLastNoHistoryActivity = null; 3789 } 3790 3791 return removeHistoryRecordsForAppLocked(app); 3792 } 3793 3794 void handleAppCrashLocked(ProcessRecord app) { 3795 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3796 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3797 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3798 final ActivityRecord r = activities.get(activityNdx); 3799 if (r.app == app) { 3800 Slog.w(TAG, " Force finishing activity " 3801 + r.intent.getComponent().flattenToShortString()); 3802 // Force the destroy to skip right to removal. 3803 r.app = null; 3804 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3805 } 3806 } 3807 } 3808 } 3809 3810 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3811 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3812 boolean printed = false; 3813 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3814 final TaskRecord task = mTaskHistory.get(taskNdx); 3815 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3816 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3817 dumpClient, dumpPackage, needSep, header, 3818 " Task id #" + task.taskId); 3819 if (printed) { 3820 header = null; 3821 } 3822 } 3823 return printed; 3824 } 3825 3826 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3827 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3828 3829 if ("all".equals(name)) { 3830 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3831 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3832 } 3833 } else if ("top".equals(name)) { 3834 final int top = mTaskHistory.size() - 1; 3835 if (top >= 0) { 3836 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3837 int listTop = list.size() - 1; 3838 if (listTop >= 0) { 3839 activities.add(list.get(listTop)); 3840 } 3841 } 3842 } else { 3843 ItemMatcher matcher = new ItemMatcher(); 3844 matcher.build(name); 3845 3846 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3847 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3848 if (matcher.match(r1, r1.intent.getComponent())) { 3849 activities.add(r1); 3850 } 3851 } 3852 } 3853 } 3854 3855 return activities; 3856 } 3857 3858 ActivityRecord restartPackage(String packageName) { 3859 ActivityRecord starting = topRunningActivityLocked(null); 3860 3861 // All activities that came from the package must be 3862 // restarted as if there was a config change. 3863 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3864 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3865 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3866 final ActivityRecord a = activities.get(activityNdx); 3867 if (a.info.packageName.equals(packageName)) { 3868 a.forceNewConfig = true; 3869 if (starting != null && a == starting && a.visible) { 3870 a.startFreezingScreenLocked(starting.app, 3871 ActivityInfo.CONFIG_SCREEN_LAYOUT); 3872 } 3873 } 3874 } 3875 } 3876 3877 return starting; 3878 } 3879 3880 void removeTask(TaskRecord task) { 3881 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 3882 mWindowManager.removeTask(task.taskId); 3883 final ActivityRecord r = mResumedActivity; 3884 if (r != null && r.task == task) { 3885 mResumedActivity = null; 3886 } 3887 3888 final int taskNdx = mTaskHistory.indexOf(task); 3889 final int topTaskNdx = mTaskHistory.size() - 1; 3890 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 3891 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 3892 if (!nextTask.isOverHomeStack()) { 3893 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3894 } 3895 } 3896 mTaskHistory.remove(task); 3897 updateTaskMovement(task, true); 3898 3899 if (task.mActivities.isEmpty()) { 3900 final boolean isVoiceSession = task.voiceSession != null; 3901 if (isVoiceSession) { 3902 try { 3903 task.voiceSession.taskFinished(task.intent, task.taskId); 3904 } catch (RemoteException e) { 3905 } 3906 } 3907 if (task.autoRemoveFromRecents() || isVoiceSession) { 3908 // Task creator asked to remove this when done, or this task was a voice 3909 // interaction, so it should not remain on the recent tasks list. 3910 mService.mRecentTasks.remove(task); 3911 task.closeRecentsChain(); 3912 } 3913 } 3914 3915 if (mTaskHistory.isEmpty()) { 3916 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 3917 if (isOnHomeDisplay()) { 3918 mStackSupervisor.moveHomeStack(!isHomeStack()); 3919 } 3920 if (mStacks != null) { 3921 mStacks.remove(this); 3922 mStacks.add(0, this); 3923 } 3924 mActivityContainer.onTaskListEmptyLocked(); 3925 } 3926 } 3927 3928 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 3929 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 3930 boolean toTop) { 3931 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 3932 voiceInteractor); 3933 addTask(task, toTop, false); 3934 return task; 3935 } 3936 3937 ArrayList<TaskRecord> getAllTasks() { 3938 return new ArrayList<TaskRecord>(mTaskHistory); 3939 } 3940 3941 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 3942 task.stack = this; 3943 if (toTop) { 3944 insertTaskAtTop(task); 3945 } else { 3946 mTaskHistory.add(0, task); 3947 updateTaskMovement(task, false); 3948 } 3949 if (!moving && task.voiceSession != null) { 3950 try { 3951 task.voiceSession.taskStarted(task.intent, task.taskId); 3952 } catch (RemoteException e) { 3953 } 3954 } 3955 } 3956 3957 public int getStackId() { 3958 return mStackId; 3959 } 3960 3961 @Override 3962 public String toString() { 3963 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 3964 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 3965 } 3966} 3967