ActivityStack.java revision 6ba042b51496b9763d721b6dca8a591c323d648c
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 == r.task) { 1886 // Here it is! Now, if this is not yet visible to the 1887 // user, then just add it without starting; it will 1888 // get started when the user navigates back to it. 1889 if (!startIt) { 1890 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1891 + task, new RuntimeException("here").fillInStackTrace()); 1892 task.addActivityToTop(r); 1893 r.putInHistory(); 1894 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1895 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1896 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1897 r.userId, r.info.configChanges, task.voiceSession != null, 1898 r.mLaunchTaskBehind); 1899 if (VALIDATE_TOKENS) { 1900 validateAppTokensLocked(); 1901 } 1902 ActivityOptions.abort(options); 1903 return; 1904 } 1905 break; 1906 } else if (task.numFullscreen > 0) { 1907 startIt = false; 1908 } 1909 } 1910 } 1911 1912 // Place a new activity at top of stack, so it is next to interact 1913 // with the user. 1914 1915 // If we are not placing the new activity frontmost, we do not want 1916 // to deliver the onUserLeaving callback to the actual frontmost 1917 // activity 1918 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1919 mStackSupervisor.mUserLeaving = false; 1920 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1921 "startActivity() behind front, mUserLeaving=false"); 1922 } 1923 1924 task = r.task; 1925 1926 // Slot the activity into the history stack and proceed 1927 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1928 new RuntimeException("here").fillInStackTrace()); 1929 task.addActivityToTop(r); 1930 task.setFrontOfTask(); 1931 1932 r.putInHistory(); 1933 if (!isHomeStack() || numActivities() > 0) { 1934 // We want to show the starting preview window if we are 1935 // switching to a new task, or the next activity's process is 1936 // not currently running. 1937 boolean showStartingIcon = newTask; 1938 ProcessRecord proc = r.app; 1939 if (proc == null) { 1940 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 1941 } 1942 if (proc == null || proc.thread == null) { 1943 showStartingIcon = true; 1944 } 1945 if (DEBUG_TRANSITION) Slog.v(TAG, 1946 "Prepare open transition: starting " + r); 1947 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 1948 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 1949 mNoAnimActivities.add(r); 1950 } else { 1951 mWindowManager.prepareAppTransition(newTask 1952 ? r.mLaunchTaskBehind 1953 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1954 : AppTransition.TRANSIT_TASK_OPEN 1955 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 1956 mNoAnimActivities.remove(r); 1957 } 1958 mWindowManager.addAppToken(task.mActivities.indexOf(r), 1959 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1960 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 1961 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 1962 boolean doShow = true; 1963 if (newTask) { 1964 // Even though this activity is starting fresh, we still need 1965 // to reset it to make sure we apply affinities to move any 1966 // existing activities from other tasks in to it. 1967 // If the caller has requested that the target task be 1968 // reset, then do so. 1969 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 1970 resetTaskIfNeededLocked(r, r); 1971 doShow = topRunningNonDelayedActivityLocked(null) == r; 1972 } 1973 } else if (options != null && new ActivityOptions(options).getAnimationType() 1974 == ActivityOptions.ANIM_SCENE_TRANSITION) { 1975 doShow = false; 1976 } 1977 if (r.mLaunchTaskBehind) { 1978 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 1979 // tell WindowManager that r is visible even though it is at the back of the stack. 1980 mWindowManager.setAppVisibility(r.appToken, true); 1981 ensureActivitiesVisibleLocked(null, 0); 1982 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 1983 // Figure out if we are transitioning from another activity that is 1984 // "has the same starting icon" as the next one. This allows the 1985 // window manager to keep the previous window it had previously 1986 // created, if it still had one. 1987 ActivityRecord prev = mResumedActivity; 1988 if (prev != null) { 1989 // We don't want to reuse the previous starting preview if: 1990 // (1) The current activity is in a different task. 1991 if (prev.task != r.task) { 1992 prev = null; 1993 } 1994 // (2) The current activity is already displayed. 1995 else if (prev.nowVisible) { 1996 prev = null; 1997 } 1998 } 1999 mWindowManager.setAppStartingWindow( 2000 r.appToken, r.packageName, r.theme, 2001 mService.compatibilityInfoForPackageLocked( 2002 r.info.applicationInfo), r.nonLocalizedLabel, 2003 r.labelRes, r.icon, r.logo, r.windowFlags, 2004 prev != null ? prev.appToken : null, showStartingIcon); 2005 r.mStartingWindowShown = true; 2006 } 2007 } else { 2008 // If this is the first activity, don't do any fancy animations, 2009 // because there is nothing for it to animate on top of. 2010 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2011 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2012 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2013 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2014 ActivityOptions.abort(options); 2015 options = null; 2016 } 2017 if (VALIDATE_TOKENS) { 2018 validateAppTokensLocked(); 2019 } 2020 2021 if (doResume) { 2022 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2023 } 2024 } 2025 2026 final void validateAppTokensLocked() { 2027 mValidateAppTokens.clear(); 2028 mValidateAppTokens.ensureCapacity(numActivities()); 2029 final int numTasks = mTaskHistory.size(); 2030 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2031 TaskRecord task = mTaskHistory.get(taskNdx); 2032 final ArrayList<ActivityRecord> activities = task.mActivities; 2033 if (activities.isEmpty()) { 2034 continue; 2035 } 2036 TaskGroup group = new TaskGroup(); 2037 group.taskId = task.taskId; 2038 mValidateAppTokens.add(group); 2039 final int numActivities = activities.size(); 2040 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2041 final ActivityRecord r = activities.get(activityNdx); 2042 group.tokens.add(r.appToken); 2043 } 2044 } 2045 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2046 } 2047 2048 /** 2049 * Perform a reset of the given task, if needed as part of launching it. 2050 * Returns the new HistoryRecord at the top of the task. 2051 */ 2052 /** 2053 * Helper method for #resetTaskIfNeededLocked. 2054 * We are inside of the task being reset... we'll either finish this activity, push it out 2055 * for another task, or leave it as-is. 2056 * @param task The task containing the Activity (taskTop) that might be reset. 2057 * @param forceReset 2058 * @return An ActivityOptions that needs to be processed. 2059 */ 2060 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2061 ActivityOptions topOptions = null; 2062 2063 int replyChainEnd = -1; 2064 boolean canMoveOptions = true; 2065 2066 // We only do this for activities that are not the root of the task (since if we finish 2067 // the root, we may no longer have the task!). 2068 final ArrayList<ActivityRecord> activities = task.mActivities; 2069 final int numActivities = activities.size(); 2070 final int rootActivityNdx = task.findEffectiveRootIndex(); 2071 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2072 ActivityRecord target = activities.get(i); 2073 if (target.frontOfTask) 2074 break; 2075 2076 final int flags = target.info.flags; 2077 final boolean finishOnTaskLaunch = 2078 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2079 final boolean allowTaskReparenting = 2080 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2081 final boolean clearWhenTaskReset = 2082 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2083 2084 if (!finishOnTaskLaunch 2085 && !clearWhenTaskReset 2086 && target.resultTo != null) { 2087 // If this activity is sending a reply to a previous 2088 // activity, we can't do anything with it now until 2089 // we reach the start of the reply chain. 2090 // XXX note that we are assuming the result is always 2091 // to the previous activity, which is almost always 2092 // the case but we really shouldn't count on. 2093 if (replyChainEnd < 0) { 2094 replyChainEnd = i; 2095 } 2096 } else if (!finishOnTaskLaunch 2097 && !clearWhenTaskReset 2098 && allowTaskReparenting 2099 && target.taskAffinity != null 2100 && !target.taskAffinity.equals(task.affinity)) { 2101 // If this activity has an affinity for another 2102 // task, then we need to move it out of here. We will 2103 // move it as far out of the way as possible, to the 2104 // bottom of the activity stack. This also keeps it 2105 // correctly ordered with any activities we previously 2106 // moved. 2107 final TaskRecord targetTask; 2108 final ActivityRecord bottom = 2109 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2110 mTaskHistory.get(0).mActivities.get(0) : null; 2111 if (bottom != null && target.taskAffinity != null 2112 && target.taskAffinity.equals(bottom.task.affinity)) { 2113 // If the activity currently at the bottom has the 2114 // same task affinity as the one we are moving, 2115 // then merge it into the same task. 2116 targetTask = bottom.task; 2117 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2118 + " out to bottom task " + bottom.task); 2119 } else { 2120 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2121 null, null, null, false); 2122 targetTask.affinityIntent = target.intent; 2123 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2124 + " out to new task " + target.task); 2125 } 2126 2127 final int targetTaskId = targetTask.taskId; 2128 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2129 2130 boolean noOptions = canMoveOptions; 2131 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2132 for (int srcPos = start; srcPos >= i; --srcPos) { 2133 final ActivityRecord p = activities.get(srcPos); 2134 if (p.finishing) { 2135 continue; 2136 } 2137 2138 canMoveOptions = false; 2139 if (noOptions && topOptions == null) { 2140 topOptions = p.takeOptionsLocked(); 2141 if (topOptions != null) { 2142 noOptions = false; 2143 } 2144 } 2145 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2146 + task + " adding to task=" + targetTask 2147 + " Callers=" + Debug.getCallers(4)); 2148 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2149 + " out to target's task " + target.task); 2150 p.setTask(targetTask, null); 2151 targetTask.addActivityAtBottom(p); 2152 2153 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2154 } 2155 2156 mWindowManager.moveTaskToBottom(targetTaskId); 2157 if (VALIDATE_TOKENS) { 2158 validateAppTokensLocked(); 2159 } 2160 2161 replyChainEnd = -1; 2162 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2163 // If the activity should just be removed -- either 2164 // because it asks for it, or the task should be 2165 // cleared -- then finish it and anything that is 2166 // part of its reply chain. 2167 int end; 2168 if (clearWhenTaskReset) { 2169 // In this case, we want to finish this activity 2170 // and everything above it, so be sneaky and pretend 2171 // like these are all in the reply chain. 2172 end = numActivities - 1; 2173 } else if (replyChainEnd < 0) { 2174 end = i; 2175 } else { 2176 end = replyChainEnd; 2177 } 2178 boolean noOptions = canMoveOptions; 2179 for (int srcPos = i; srcPos <= end; srcPos++) { 2180 ActivityRecord p = activities.get(srcPos); 2181 if (p.finishing) { 2182 continue; 2183 } 2184 canMoveOptions = false; 2185 if (noOptions && topOptions == null) { 2186 topOptions = p.takeOptionsLocked(); 2187 if (topOptions != null) { 2188 noOptions = false; 2189 } 2190 } 2191 if (DEBUG_TASKS) Slog.w(TAG, 2192 "resetTaskIntendedTask: calling finishActivity on " + p); 2193 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2194 end--; 2195 srcPos--; 2196 } 2197 } 2198 replyChainEnd = -1; 2199 } else { 2200 // If we were in the middle of a chain, well the 2201 // activity that started it all doesn't want anything 2202 // special, so leave it all as-is. 2203 replyChainEnd = -1; 2204 } 2205 } 2206 2207 return topOptions; 2208 } 2209 2210 /** 2211 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2212 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2213 * @param affinityTask The task we are looking for an affinity to. 2214 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2215 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2216 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2217 */ 2218 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2219 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2220 int replyChainEnd = -1; 2221 final int taskId = task.taskId; 2222 final String taskAffinity = task.affinity; 2223 2224 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2225 final int numActivities = activities.size(); 2226 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2227 2228 // Do not operate on or below the effective root Activity. 2229 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2230 ActivityRecord target = activities.get(i); 2231 if (target.frontOfTask) 2232 break; 2233 2234 final int flags = target.info.flags; 2235 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2236 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2237 2238 if (target.resultTo != null) { 2239 // If this activity is sending a reply to a previous 2240 // activity, we can't do anything with it now until 2241 // we reach the start of the reply chain. 2242 // XXX note that we are assuming the result is always 2243 // to the previous activity, which is almost always 2244 // the case but we really shouldn't count on. 2245 if (replyChainEnd < 0) { 2246 replyChainEnd = i; 2247 } 2248 } else if (topTaskIsHigher 2249 && allowTaskReparenting 2250 && taskAffinity != null 2251 && taskAffinity.equals(target.taskAffinity)) { 2252 // This activity has an affinity for our task. Either remove it if we are 2253 // clearing or move it over to our task. Note that 2254 // we currently punt on the case where we are resetting a 2255 // task that is not at the top but who has activities above 2256 // with an affinity to it... this is really not a normal 2257 // case, and we will need to later pull that task to the front 2258 // and usually at that point we will do the reset and pick 2259 // up those remaining activities. (This only happens if 2260 // someone starts an activity in a new task from an activity 2261 // in a task that is not currently on top.) 2262 if (forceReset || finishOnTaskLaunch) { 2263 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2264 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2265 for (int srcPos = start; srcPos >= i; --srcPos) { 2266 final ActivityRecord p = activities.get(srcPos); 2267 if (p.finishing) { 2268 continue; 2269 } 2270 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2271 } 2272 } else { 2273 if (taskInsertionPoint < 0) { 2274 taskInsertionPoint = task.mActivities.size(); 2275 2276 } 2277 2278 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2279 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2280 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2281 for (int srcPos = start; srcPos >= i; --srcPos) { 2282 final ActivityRecord p = activities.get(srcPos); 2283 p.setTask(task, null); 2284 task.addActivityAtIndex(taskInsertionPoint, p); 2285 2286 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2287 + " to stack at " + task, 2288 new RuntimeException("here").fillInStackTrace()); 2289 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2290 + " in to resetting task " + task); 2291 mWindowManager.setAppGroupId(p.appToken, taskId); 2292 } 2293 mWindowManager.moveTaskToTop(taskId); 2294 if (VALIDATE_TOKENS) { 2295 validateAppTokensLocked(); 2296 } 2297 2298 // Now we've moved it in to place... but what if this is 2299 // a singleTop activity and we have put it on top of another 2300 // instance of the same activity? Then we drop the instance 2301 // below so it remains singleTop. 2302 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2303 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2304 int targetNdx = taskActivities.indexOf(target); 2305 if (targetNdx > 0) { 2306 ActivityRecord p = taskActivities.get(targetNdx - 1); 2307 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2308 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2309 false); 2310 } 2311 } 2312 } 2313 } 2314 2315 replyChainEnd = -1; 2316 } 2317 } 2318 return taskInsertionPoint; 2319 } 2320 2321 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2322 ActivityRecord newActivity) { 2323 boolean forceReset = 2324 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2325 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2326 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2327 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2328 forceReset = true; 2329 } 2330 } 2331 2332 final TaskRecord task = taskTop.task; 2333 2334 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2335 * for remaining tasks. Used for later tasks to reparent to task. */ 2336 boolean taskFound = false; 2337 2338 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2339 ActivityOptions topOptions = null; 2340 2341 // Preserve the location for reparenting in the new task. 2342 int reparentInsertionPoint = -1; 2343 2344 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2345 final TaskRecord targetTask = mTaskHistory.get(i); 2346 2347 if (targetTask == task) { 2348 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2349 taskFound = true; 2350 } else { 2351 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2352 taskFound, forceReset, reparentInsertionPoint); 2353 } 2354 } 2355 2356 int taskNdx = mTaskHistory.indexOf(task); 2357 do { 2358 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2359 } while (taskTop == null && taskNdx >= 0); 2360 2361 if (topOptions != null) { 2362 // If we got some ActivityOptions from an activity on top that 2363 // was removed from the task, propagate them to the new real top. 2364 if (taskTop != null) { 2365 taskTop.updateOptionsLocked(topOptions); 2366 } else { 2367 topOptions.abort(); 2368 } 2369 } 2370 2371 return taskTop; 2372 } 2373 2374 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2375 String resultWho, int requestCode, int resultCode, Intent data) { 2376 2377 if (callingUid > 0) { 2378 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2379 data, r.getUriPermissionsLocked(), r.userId); 2380 } 2381 2382 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2383 + " : who=" + resultWho + " req=" + requestCode 2384 + " res=" + resultCode + " data=" + data); 2385 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2386 try { 2387 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2388 list.add(new ResultInfo(resultWho, requestCode, 2389 resultCode, data)); 2390 r.app.thread.scheduleSendResult(r.appToken, list); 2391 return; 2392 } catch (Exception e) { 2393 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2394 } 2395 } 2396 2397 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2398 } 2399 2400 private void adjustFocusedActivityLocked(ActivityRecord r) { 2401 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2402 ActivityRecord next = topRunningActivityLocked(null); 2403 if (next != r) { 2404 final TaskRecord task = r.task; 2405 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2406 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2407 } 2408 } 2409 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2410 if (top != null) { 2411 mService.setFocusedActivityLocked(top); 2412 } 2413 } 2414 } 2415 2416 final void stopActivityLocked(ActivityRecord r) { 2417 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2418 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2419 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2420 if (!r.finishing) { 2421 if (!mService.isSleeping()) { 2422 if (DEBUG_STATES) { 2423 Slog.d(TAG, "no-history finish of " + r); 2424 } 2425 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2426 "no-history", false); 2427 } else { 2428 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2429 + " on stop because we're just sleeping"); 2430 } 2431 } 2432 } 2433 2434 if (r.app != null && r.app.thread != null) { 2435 adjustFocusedActivityLocked(r); 2436 r.resumeKeyDispatchingLocked(); 2437 try { 2438 r.stopped = false; 2439 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2440 + " (stop requested)"); 2441 r.state = ActivityState.STOPPING; 2442 if (DEBUG_VISBILITY) Slog.v( 2443 TAG, "Stopping visible=" + r.visible + " for " + r); 2444 if (!r.visible) { 2445 mWindowManager.setAppVisibility(r.appToken, false); 2446 } 2447 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2448 if (mService.isSleepingOrShuttingDown()) { 2449 r.setSleeping(true); 2450 } 2451 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2452 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2453 } catch (Exception e) { 2454 // Maybe just ignore exceptions here... if the process 2455 // has crashed, our death notification will clean things 2456 // up. 2457 Slog.w(TAG, "Exception thrown during pause", e); 2458 // Just in case, assume it to be stopped. 2459 r.stopped = true; 2460 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2461 r.state = ActivityState.STOPPED; 2462 if (r.configDestroy) { 2463 destroyActivityLocked(r, true, "stop-except"); 2464 } 2465 } 2466 } 2467 } 2468 2469 /** 2470 * @return Returns true if the activity is being finished, false if for 2471 * some reason it is being left as-is. 2472 */ 2473 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2474 Intent resultData, String reason, boolean oomAdj) { 2475 ActivityRecord r = isInStackLocked(token); 2476 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2477 TAG, "Finishing activity token=" + token + " r=" 2478 + ", result=" + resultCode + ", data=" + resultData 2479 + ", reason=" + reason); 2480 if (r == null) { 2481 return false; 2482 } 2483 2484 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2485 return true; 2486 } 2487 2488 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2489 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2490 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2491 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2492 ActivityRecord r = activities.get(activityNdx); 2493 if (r.resultTo == self && r.requestCode == requestCode) { 2494 if ((r.resultWho == null && resultWho == null) || 2495 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2496 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2497 false); 2498 } 2499 } 2500 } 2501 } 2502 mService.updateOomAdjLocked(); 2503 } 2504 2505 final void finishTopRunningActivityLocked(ProcessRecord app) { 2506 ActivityRecord r = topRunningActivityLocked(null); 2507 if (r != null && r.app == app) { 2508 // If the top running activity is from this crashing 2509 // process, then terminate it to avoid getting in a loop. 2510 Slog.w(TAG, " Force finishing activity " 2511 + r.intent.getComponent().flattenToShortString()); 2512 int taskNdx = mTaskHistory.indexOf(r.task); 2513 int activityNdx = r.task.mActivities.indexOf(r); 2514 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2515 // Also terminate any activities below it that aren't yet 2516 // stopped, to avoid a situation where one will get 2517 // re-start our crashing activity once it gets resumed again. 2518 --activityNdx; 2519 if (activityNdx < 0) { 2520 do { 2521 --taskNdx; 2522 if (taskNdx < 0) { 2523 break; 2524 } 2525 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2526 } while (activityNdx < 0); 2527 } 2528 if (activityNdx >= 0) { 2529 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2530 if (r.state == ActivityState.RESUMED 2531 || r.state == ActivityState.PAUSING 2532 || r.state == ActivityState.PAUSED) { 2533 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2534 Slog.w(TAG, " Force finishing activity " 2535 + r.intent.getComponent().flattenToShortString()); 2536 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2537 } 2538 } 2539 } 2540 } 2541 } 2542 2543 final void finishVoiceTask(IVoiceInteractionSession session) { 2544 IBinder sessionBinder = session.asBinder(); 2545 boolean didOne = false; 2546 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2547 TaskRecord tr = mTaskHistory.get(taskNdx); 2548 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2549 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2550 ActivityRecord r = tr.mActivities.get(activityNdx); 2551 if (!r.finishing) { 2552 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2553 false); 2554 didOne = true; 2555 } 2556 } 2557 } 2558 } 2559 if (didOne) { 2560 mService.updateOomAdjLocked(); 2561 } 2562 } 2563 2564 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2565 ArrayList<ActivityRecord> activities = r.task.mActivities; 2566 for (int index = activities.indexOf(r); index >= 0; --index) { 2567 ActivityRecord cur = activities.get(index); 2568 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2569 break; 2570 } 2571 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2572 } 2573 return true; 2574 } 2575 2576 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2577 // send the result 2578 ActivityRecord resultTo = r.resultTo; 2579 if (resultTo != null) { 2580 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2581 + " who=" + r.resultWho + " req=" + r.requestCode 2582 + " res=" + resultCode + " data=" + resultData); 2583 if (resultTo.userId != r.userId) { 2584 if (resultData != null) { 2585 resultData.setContentUserHint(r.userId); 2586 } 2587 } 2588 if (r.info.applicationInfo.uid > 0) { 2589 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2590 resultTo.packageName, resultData, 2591 resultTo.getUriPermissionsLocked(), resultTo.userId); 2592 } 2593 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2594 resultData); 2595 r.resultTo = null; 2596 } 2597 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2598 2599 // Make sure this HistoryRecord is not holding on to other resources, 2600 // because clients have remote IPC references to this object so we 2601 // can't assume that will go away and want to avoid circular IPC refs. 2602 r.results = null; 2603 r.pendingResults = null; 2604 r.newIntents = null; 2605 r.icicle = null; 2606 } 2607 2608 /** 2609 * @return Returns true if this activity has been removed from the history 2610 * list, or false if it is still in the list and will be removed later. 2611 */ 2612 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2613 String reason, boolean oomAdj) { 2614 if (r.finishing) { 2615 Slog.w(TAG, "Duplicate finish request for " + r); 2616 return false; 2617 } 2618 2619 r.makeFinishing(); 2620 final TaskRecord task = r.task; 2621 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2622 r.userId, System.identityHashCode(r), 2623 task.taskId, r.shortComponentName, reason); 2624 final ArrayList<ActivityRecord> activities = task.mActivities; 2625 final int index = activities.indexOf(r); 2626 if (index < (activities.size() - 1)) { 2627 task.setFrontOfTask(); 2628 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2629 // If the caller asked that this activity (and all above it) 2630 // be cleared when the task is reset, don't lose that information, 2631 // but propagate it up to the next activity. 2632 ActivityRecord next = activities.get(index+1); 2633 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2634 } 2635 } 2636 2637 r.pauseKeyDispatchingLocked(); 2638 2639 adjustFocusedActivityLocked(r); 2640 2641 finishActivityResultsLocked(r, resultCode, resultData); 2642 2643 if (mResumedActivity == r) { 2644 boolean endTask = index <= 0; 2645 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2646 "Prepare close transition: finishing " + r); 2647 mWindowManager.prepareAppTransition(endTask 2648 ? AppTransition.TRANSIT_TASK_CLOSE 2649 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2650 2651 // Tell window manager to prepare for this one to be removed. 2652 mWindowManager.setAppVisibility(r.appToken, false); 2653 2654 if (mPausingActivity == null) { 2655 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2656 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2657 startPausingLocked(false, false); 2658 } 2659 2660 if (endTask) { 2661 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2662 } 2663 } else if (r.state != ActivityState.PAUSING) { 2664 // If the activity is PAUSING, we will complete the finish once 2665 // it is done pausing; else we can just directly finish it here. 2666 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2667 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2668 } else { 2669 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2670 } 2671 2672 return false; 2673 } 2674 2675 static final int FINISH_IMMEDIATELY = 0; 2676 static final int FINISH_AFTER_PAUSE = 1; 2677 static final int FINISH_AFTER_VISIBLE = 2; 2678 2679 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2680 // First things first: if this activity is currently visible, 2681 // and the resumed activity is not yet visible, then hold off on 2682 // finishing until the resumed one becomes visible. 2683 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2684 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2685 mStackSupervisor.mStoppingActivities.add(r); 2686 if (mStackSupervisor.mStoppingActivities.size() > 3 2687 || r.frontOfTask && mTaskHistory.size() <= 1) { 2688 // If we already have a few activities waiting to stop, 2689 // then give up on things going idle and start clearing 2690 // them out. Or if r is the last of activity of the last task the stack 2691 // will be empty and must be cleared immediately. 2692 mStackSupervisor.scheduleIdleLocked(); 2693 } else { 2694 mStackSupervisor.checkReadyForSleepLocked(); 2695 } 2696 } 2697 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2698 + " (finish requested)"); 2699 r.state = ActivityState.STOPPING; 2700 if (oomAdj) { 2701 mService.updateOomAdjLocked(); 2702 } 2703 return r; 2704 } 2705 2706 // make sure the record is cleaned out of other places. 2707 mStackSupervisor.mStoppingActivities.remove(r); 2708 mStackSupervisor.mGoingToSleepActivities.remove(r); 2709 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2710 if (mResumedActivity == r) { 2711 mResumedActivity = null; 2712 } 2713 final ActivityState prevState = r.state; 2714 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2715 r.state = ActivityState.FINISHING; 2716 2717 if (mode == FINISH_IMMEDIATELY 2718 || prevState == ActivityState.STOPPED 2719 || prevState == ActivityState.INITIALIZING) { 2720 // If this activity is already stopped, we can just finish 2721 // it right now. 2722 r.makeFinishing(); 2723 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2724 if (activityRemoved) { 2725 mStackSupervisor.resumeTopActivitiesLocked(); 2726 } 2727 if (DEBUG_CONTAINERS) Slog.d(TAG, 2728 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2729 " destroy returned removed=" + activityRemoved); 2730 return activityRemoved ? null : r; 2731 } 2732 2733 // Need to go through the full pause cycle to get this 2734 // activity into the stopped state and then finish it. 2735 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2736 mStackSupervisor.mFinishingActivities.add(r); 2737 r.resumeKeyDispatchingLocked(); 2738 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2739 return r; 2740 } 2741 2742 void finishAllActivitiesLocked(boolean immediately) { 2743 boolean noActivitiesInStack = true; 2744 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2745 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2746 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2747 final ActivityRecord r = activities.get(activityNdx); 2748 noActivitiesInStack = false; 2749 if (r.finishing && !immediately) { 2750 continue; 2751 } 2752 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2753 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2754 } 2755 } 2756 if (noActivitiesInStack) { 2757 mActivityContainer.onTaskListEmptyLocked(); 2758 } 2759 } 2760 2761 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2762 Intent resultData) { 2763 final ActivityRecord srec = ActivityRecord.forToken(token); 2764 final TaskRecord task = srec.task; 2765 final ArrayList<ActivityRecord> activities = task.mActivities; 2766 final int start = activities.indexOf(srec); 2767 if (!mTaskHistory.contains(task) || (start < 0)) { 2768 return false; 2769 } 2770 int finishTo = start - 1; 2771 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2772 boolean foundParentInTask = false; 2773 final ComponentName dest = destIntent.getComponent(); 2774 if (start > 0 && dest != null) { 2775 for (int i = finishTo; i >= 0; i--) { 2776 ActivityRecord r = activities.get(i); 2777 if (r.info.packageName.equals(dest.getPackageName()) && 2778 r.info.name.equals(dest.getClassName())) { 2779 finishTo = i; 2780 parent = r; 2781 foundParentInTask = true; 2782 break; 2783 } 2784 } 2785 } 2786 2787 IActivityController controller = mService.mController; 2788 if (controller != null) { 2789 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2790 if (next != null) { 2791 // ask watcher if this is allowed 2792 boolean resumeOK = true; 2793 try { 2794 resumeOK = controller.activityResuming(next.packageName); 2795 } catch (RemoteException e) { 2796 mService.mController = null; 2797 Watchdog.getInstance().setActivityController(null); 2798 } 2799 2800 if (!resumeOK) { 2801 return false; 2802 } 2803 } 2804 } 2805 final long origId = Binder.clearCallingIdentity(); 2806 for (int i = start; i > finishTo; i--) { 2807 ActivityRecord r = activities.get(i); 2808 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2809 // Only return the supplied result for the first activity finished 2810 resultCode = Activity.RESULT_CANCELED; 2811 resultData = null; 2812 } 2813 2814 if (parent != null && foundParentInTask) { 2815 final int parentLaunchMode = parent.info.launchMode; 2816 final int destIntentFlags = destIntent.getFlags(); 2817 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2818 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2819 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2820 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2821 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2822 } else { 2823 try { 2824 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2825 destIntent.getComponent(), 0, srec.userId); 2826 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2827 null, aInfo, null, null, parent.appToken, null, 2828 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2829 0, null, true, null, null); 2830 foundParentInTask = res == ActivityManager.START_SUCCESS; 2831 } catch (RemoteException e) { 2832 foundParentInTask = false; 2833 } 2834 requestFinishActivityLocked(parent.appToken, resultCode, 2835 resultData, "navigate-up", true); 2836 } 2837 } 2838 Binder.restoreCallingIdentity(origId); 2839 return foundParentInTask; 2840 } 2841 /** 2842 * Perform the common clean-up of an activity record. This is called both 2843 * as part of destroyActivityLocked() (when destroying the client-side 2844 * representation) and cleaning things up as a result of its hosting 2845 * processing going away, in which case there is no remaining client-side 2846 * state to destroy so only the cleanup here is needed. 2847 */ 2848 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2849 boolean setState) { 2850 if (mResumedActivity == r) { 2851 mResumedActivity = null; 2852 } 2853 if (mPausingActivity == r) { 2854 mPausingActivity = null; 2855 } 2856 mService.clearFocusedActivity(r); 2857 2858 r.configDestroy = false; 2859 r.frozenBeforeDestroy = false; 2860 2861 if (setState) { 2862 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2863 r.state = ActivityState.DESTROYED; 2864 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2865 r.app = null; 2866 } 2867 2868 // Make sure this record is no longer in the pending finishes list. 2869 // This could happen, for example, if we are trimming activities 2870 // down to the max limit while they are still waiting to finish. 2871 mStackSupervisor.mFinishingActivities.remove(r); 2872 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2873 mStackSupervisor.removePendingActivityLaunchesLocked(r); 2874 2875 // Remove any pending results. 2876 if (r.finishing && r.pendingResults != null) { 2877 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2878 PendingIntentRecord rec = apr.get(); 2879 if (rec != null) { 2880 mService.cancelIntentSenderLocked(rec, false); 2881 } 2882 } 2883 r.pendingResults = null; 2884 } 2885 2886 if (cleanServices) { 2887 cleanUpActivityServicesLocked(r); 2888 } 2889 2890 // Get rid of any pending idle timeouts. 2891 removeTimeoutsForActivityLocked(r); 2892 if (getMediaPlayer() == r) { 2893 mStackSupervisor.setMediaPlayingLocked(r, false); 2894 } 2895 } 2896 2897 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2898 mStackSupervisor.removeTimeoutsForActivityLocked(r); 2899 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 2900 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 2901 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2902 r.finishLaunchTickingLocked(); 2903 } 2904 2905 private void removeActivityFromHistoryLocked(ActivityRecord r) { 2906 mStackSupervisor.removeChildActivityContainers(r); 2907 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 2908 r.makeFinishing(); 2909 if (DEBUG_ADD_REMOVE) { 2910 RuntimeException here = new RuntimeException("here"); 2911 here.fillInStackTrace(); 2912 Slog.i(TAG, "Removing activity " + r + " from stack"); 2913 } 2914 r.takeFromHistory(); 2915 removeTimeoutsForActivityLocked(r); 2916 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 2917 r.state = ActivityState.DESTROYED; 2918 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 2919 r.app = null; 2920 mWindowManager.removeAppToken(r.appToken); 2921 if (VALIDATE_TOKENS) { 2922 validateAppTokensLocked(); 2923 } 2924 final TaskRecord task = r.task; 2925 if (task != null && task.removeActivity(r)) { 2926 if (DEBUG_STACK) Slog.i(TAG, 2927 "removeActivityFromHistoryLocked: last activity removed from " + this); 2928 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 2929 task.isOverHomeStack()) { 2930 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2931 } 2932 removeTask(task); 2933 } 2934 cleanUpActivityServicesLocked(r); 2935 r.removeUriPermissionsLocked(); 2936 } 2937 2938 /** 2939 * Perform clean-up of service connections in an activity record. 2940 */ 2941 final void cleanUpActivityServicesLocked(ActivityRecord r) { 2942 // Throw away any services that have been bound by this activity. 2943 if (r.connections != null) { 2944 Iterator<ConnectionRecord> it = r.connections.iterator(); 2945 while (it.hasNext()) { 2946 ConnectionRecord c = it.next(); 2947 mService.mServices.removeConnectionLocked(c, null, r); 2948 } 2949 r.connections = null; 2950 } 2951 } 2952 2953 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 2954 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 2955 msg.obj = new ScheduleDestroyArgs(owner, reason); 2956 mHandler.sendMessage(msg); 2957 } 2958 2959 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 2960 boolean lastIsOpaque = false; 2961 boolean activityRemoved = false; 2962 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2963 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2964 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2965 final ActivityRecord r = activities.get(activityNdx); 2966 if (r.finishing) { 2967 continue; 2968 } 2969 if (r.fullscreen) { 2970 lastIsOpaque = true; 2971 } 2972 if (owner != null && r.app != owner) { 2973 continue; 2974 } 2975 if (!lastIsOpaque) { 2976 continue; 2977 } 2978 // We can destroy this one if we have its icicle saved and 2979 // it is not in the process of pausing/stopping/finishing. 2980 if (r.app != null && r != mResumedActivity && r != mPausingActivity 2981 && r.haveState && !r.visible && r.stopped 2982 && r.state != ActivityState.DESTROYING 2983 && r.state != ActivityState.DESTROYED) { 2984 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 2985 + " resumed=" + mResumedActivity 2986 + " pausing=" + mPausingActivity); 2987 if (destroyActivityLocked(r, true, reason)) { 2988 activityRemoved = true; 2989 } 2990 } 2991 } 2992 } 2993 if (activityRemoved) { 2994 mStackSupervisor.resumeTopActivitiesLocked(); 2995 } 2996 } 2997 2998 /** 2999 * Destroy the current CLIENT SIDE instance of an activity. This may be 3000 * called both when actually finishing an activity, or when performing 3001 * a configuration switch where we destroy the current client-side object 3002 * but then create a new client-side object for this same HistoryRecord. 3003 */ 3004 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3005 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3006 TAG, "Removing activity from " + reason + ": token=" + r 3007 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3008 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3009 r.userId, System.identityHashCode(r), 3010 r.task.taskId, r.shortComponentName, reason); 3011 3012 boolean removedFromHistory = false; 3013 3014 cleanUpActivityLocked(r, false, false); 3015 3016 final boolean hadApp = r.app != null; 3017 3018 if (hadApp) { 3019 if (removeFromApp) { 3020 r.app.activities.remove(r); 3021 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3022 mService.mHeavyWeightProcess = null; 3023 mService.mHandler.sendEmptyMessage( 3024 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3025 } 3026 if (r.app.activities.isEmpty()) { 3027 // No longer have activities, so update LRU list and oom adj. 3028 mService.updateLruProcessLocked(r.app, false, null); 3029 mService.updateOomAdjLocked(); 3030 } 3031 } 3032 3033 boolean skipDestroy = false; 3034 3035 try { 3036 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3037 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3038 r.configChangeFlags); 3039 } catch (Exception e) { 3040 // We can just ignore exceptions here... if the process 3041 // has crashed, our death notification will clean things 3042 // up. 3043 //Slog.w(TAG, "Exception thrown during finish", e); 3044 if (r.finishing) { 3045 removeActivityFromHistoryLocked(r); 3046 removedFromHistory = true; 3047 skipDestroy = true; 3048 } 3049 } 3050 3051 r.nowVisible = false; 3052 3053 // If the activity is finishing, we need to wait on removing it 3054 // from the list to give it a chance to do its cleanup. During 3055 // that time it may make calls back with its token so we need to 3056 // be able to find it on the list and so we don't want to remove 3057 // it from the list yet. Otherwise, we can just immediately put 3058 // it in the destroyed state since we are not removing it from the 3059 // list. 3060 if (r.finishing && !skipDestroy) { 3061 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3062 + " (destroy requested)"); 3063 r.state = ActivityState.DESTROYING; 3064 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3065 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3066 } else { 3067 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3068 r.state = ActivityState.DESTROYED; 3069 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3070 r.app = null; 3071 } 3072 } else { 3073 // remove this record from the history. 3074 if (r.finishing) { 3075 removeActivityFromHistoryLocked(r); 3076 removedFromHistory = true; 3077 } else { 3078 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3079 r.state = ActivityState.DESTROYED; 3080 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3081 r.app = null; 3082 } 3083 } 3084 3085 r.configChangeFlags = 0; 3086 3087 if (!mLRUActivities.remove(r) && hadApp) { 3088 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3089 } 3090 3091 return removedFromHistory; 3092 } 3093 3094 final void activityDestroyedLocked(IBinder token) { 3095 final long origId = Binder.clearCallingIdentity(); 3096 try { 3097 ActivityRecord r = ActivityRecord.forToken(token); 3098 if (r != null) { 3099 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3100 } 3101 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3102 3103 if (isInStackLocked(token) != null) { 3104 if (r.state == ActivityState.DESTROYING) { 3105 cleanUpActivityLocked(r, true, false); 3106 removeActivityFromHistoryLocked(r); 3107 } 3108 } 3109 mStackSupervisor.resumeTopActivitiesLocked(); 3110 } finally { 3111 Binder.restoreCallingIdentity(origId); 3112 } 3113 } 3114 3115 void releaseMediaResources() { 3116 if (isMediaPlaying() && !mHandler.hasMessages(STOP_MEDIA_PLAYING_TIMEOUT_MSG)) { 3117 final ActivityRecord r = getMediaPlayer(); 3118 if (DEBUG_STATES) Slog.d(TAG, "releaseMediaResources activtyDisplay=" + 3119 mActivityContainer.mActivityDisplay + " mediaPlayer=" + r + " app=" + r.app + 3120 " thread=" + r.app.thread); 3121 if (r != null && r.app != null && r.app.thread != null) { 3122 try { 3123 r.app.thread.scheduleStopMediaPlaying(r.appToken); 3124 } catch (RemoteException e) { 3125 } 3126 mHandler.sendEmptyMessageDelayed(STOP_MEDIA_PLAYING_TIMEOUT_MSG, 500); 3127 } else { 3128 Slog.e(TAG, "releaseMediaResources: activity " + r + " no longer running"); 3129 mediaResourcesReleased(r.appToken); 3130 } 3131 } 3132 } 3133 3134 final void mediaResourcesReleased(IBinder token) { 3135 mHandler.removeMessages(STOP_MEDIA_PLAYING_TIMEOUT_MSG); 3136 final ActivityRecord r = getMediaPlayer(); 3137 if (r != null) { 3138 mStackSupervisor.mStoppingActivities.add(r); 3139 setMediaPlayer(null); 3140 } 3141 mStackSupervisor.resumeTopActivitiesLocked(); 3142 } 3143 3144 boolean isMediaPlaying() { 3145 return isAttached() && mActivityContainer.mActivityDisplay.isMediaPlaying(); 3146 } 3147 3148 void setMediaPlayer(ActivityRecord r) { 3149 if (isAttached()) { 3150 mActivityContainer.mActivityDisplay.setMediaPlaying(r); 3151 } 3152 } 3153 3154 ActivityRecord getMediaPlayer() { 3155 return isAttached() ? mActivityContainer.mActivityDisplay.mMediaPlayingActivity : null; 3156 } 3157 3158 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3159 ProcessRecord app, String listName) { 3160 int i = list.size(); 3161 if (DEBUG_CLEANUP) Slog.v( 3162 TAG, "Removing app " + app + " from list " + listName 3163 + " with " + i + " entries"); 3164 while (i > 0) { 3165 i--; 3166 ActivityRecord r = list.get(i); 3167 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3168 if (r.app == app) { 3169 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3170 list.remove(i); 3171 removeTimeoutsForActivityLocked(r); 3172 } 3173 } 3174 } 3175 3176 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3177 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3178 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3179 "mStoppingActivities"); 3180 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3181 "mGoingToSleepActivities"); 3182 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3183 "mWaitingVisibleActivities"); 3184 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3185 "mFinishingActivities"); 3186 3187 boolean hasVisibleActivities = false; 3188 3189 // Clean out the history list. 3190 int i = numActivities(); 3191 if (DEBUG_CLEANUP) Slog.v( 3192 TAG, "Removing app " + app + " from history with " + i + " entries"); 3193 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3194 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3195 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3196 final ActivityRecord r = activities.get(activityNdx); 3197 --i; 3198 if (DEBUG_CLEANUP) Slog.v( 3199 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3200 if (r.app == app) { 3201 boolean remove; 3202 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3203 // Don't currently have state for the activity, or 3204 // it is finishing -- always remove it. 3205 remove = true; 3206 } else if (r.launchCount > 2 && 3207 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3208 // We have launched this activity too many times since it was 3209 // able to run, so give up and remove it. 3210 remove = true; 3211 } else { 3212 // The process may be gone, but the activity lives on! 3213 remove = false; 3214 } 3215 if (remove) { 3216 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3217 RuntimeException here = new RuntimeException("here"); 3218 here.fillInStackTrace(); 3219 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3220 + ": haveState=" + r.haveState 3221 + " stateNotNeeded=" + r.stateNotNeeded 3222 + " finishing=" + r.finishing 3223 + " state=" + r.state, here); 3224 } 3225 if (!r.finishing) { 3226 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3227 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3228 r.userId, System.identityHashCode(r), 3229 r.task.taskId, r.shortComponentName, 3230 "proc died without state saved"); 3231 if (r.state == ActivityState.RESUMED) { 3232 mService.updateUsageStats(r, false); 3233 } 3234 } 3235 removeActivityFromHistoryLocked(r); 3236 3237 } else { 3238 // We have the current state for this activity, so 3239 // it can be restarted later when needed. 3240 if (localLOGV) Slog.v( 3241 TAG, "Keeping entry, setting app to null"); 3242 if (r.visible) { 3243 hasVisibleActivities = true; 3244 } 3245 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3246 + r); 3247 r.app = null; 3248 r.nowVisible = false; 3249 if (!r.haveState) { 3250 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3251 "App died, clearing saved state of " + r); 3252 r.icicle = null; 3253 } 3254 } 3255 3256 cleanUpActivityLocked(r, true, true); 3257 } 3258 } 3259 } 3260 3261 return hasVisibleActivities; 3262 } 3263 3264 final void updateTransitLocked(int transit, Bundle options) { 3265 if (options != null) { 3266 ActivityRecord r = topRunningActivityLocked(null); 3267 if (r != null && r.state != ActivityState.RESUMED) { 3268 r.updateOptionsLocked(options); 3269 } else { 3270 ActivityOptions.abort(options); 3271 } 3272 } 3273 mWindowManager.prepareAppTransition(transit, false); 3274 } 3275 3276 void updateTaskMovement(TaskRecord task, boolean toFront) { 3277 if (task.isPersistable) { 3278 task.mLastTimeMoved = System.currentTimeMillis(); 3279 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3280 // recently will be most negative, tasks sent to the bottom before that will be less 3281 // negative. Similarly for recent tasks moved to the top which will be most positive. 3282 if (!toFront) { 3283 task.mLastTimeMoved *= -1; 3284 } 3285 } 3286 } 3287 3288 void moveHomeStackTaskToTop(int homeStackTaskType) { 3289 final int top = mTaskHistory.size() - 1; 3290 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3291 final TaskRecord task = mTaskHistory.get(taskNdx); 3292 if (task.taskType == homeStackTaskType) { 3293 if (DEBUG_TASKS || DEBUG_STACK) 3294 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3295 mTaskHistory.remove(taskNdx); 3296 mTaskHistory.add(top, task); 3297 updateTaskMovement(task, true); 3298 mWindowManager.moveTaskToTop(task.taskId); 3299 return; 3300 } 3301 } 3302 } 3303 3304 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3305 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3306 3307 final int numTasks = mTaskHistory.size(); 3308 final int index = mTaskHistory.indexOf(tr); 3309 if (numTasks == 0 || index < 0) { 3310 // nothing to do! 3311 if (reason != null && 3312 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3313 ActivityOptions.abort(options); 3314 } else { 3315 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3316 } 3317 return; 3318 } 3319 3320 moveToFront(); 3321 3322 // Shift all activities with this task up to the top 3323 // of the stack, keeping them in the same internal order. 3324 insertTaskAtTop(tr); 3325 3326 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3327 if (reason != null && 3328 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3329 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3330 ActivityRecord r = topRunningActivityLocked(null); 3331 if (r != null) { 3332 mNoAnimActivities.add(r); 3333 } 3334 ActivityOptions.abort(options); 3335 } else { 3336 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3337 } 3338 3339 mWindowManager.moveTaskToTop(tr.taskId); 3340 3341 mStackSupervisor.resumeTopActivitiesLocked(); 3342 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3343 3344 if (VALIDATE_TOKENS) { 3345 validateAppTokensLocked(); 3346 } 3347 } 3348 3349 /** 3350 * Worker method for rearranging history stack. Implements the function of moving all 3351 * activities for a specific task (gathering them if disjoint) into a single group at the 3352 * bottom of the stack. 3353 * 3354 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3355 * to premeptively cancel the move. 3356 * 3357 * @param taskId The taskId to collect and move to the bottom. 3358 * @return Returns true if the move completed, false if not. 3359 */ 3360 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3361 final TaskRecord tr = taskForIdLocked(taskId); 3362 if (tr == null) { 3363 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3364 return false; 3365 } 3366 3367 Slog.i(TAG, "moveTaskToBack: " + tr); 3368 3369 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3370 3371 // If we have a watcher, preflight the move before committing to it. First check 3372 // for *other* available tasks, but if none are available, then try again allowing the 3373 // current task to be selected. 3374 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3375 ActivityRecord next = topRunningActivityLocked(null, taskId); 3376 if (next == null) { 3377 next = topRunningActivityLocked(null, 0); 3378 } 3379 if (next != null) { 3380 // ask watcher if this is allowed 3381 boolean moveOK = true; 3382 try { 3383 moveOK = mService.mController.activityResuming(next.packageName); 3384 } catch (RemoteException e) { 3385 mService.mController = null; 3386 Watchdog.getInstance().setActivityController(null); 3387 } 3388 if (!moveOK) { 3389 return false; 3390 } 3391 } 3392 } 3393 3394 if (DEBUG_TRANSITION) Slog.v(TAG, 3395 "Prepare to back transition: task=" + taskId); 3396 3397 mTaskHistory.remove(tr); 3398 mTaskHistory.add(0, tr); 3399 updateTaskMovement(tr, false); 3400 3401 // There is an assumption that moving a task to the back moves it behind the home activity. 3402 // We make sure here that some activity in the stack will launch home. 3403 int numTasks = mTaskHistory.size(); 3404 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3405 final TaskRecord task = mTaskHistory.get(taskNdx); 3406 if (task.isOverHomeStack()) { 3407 break; 3408 } 3409 if (taskNdx == 1) { 3410 // Set the last task before tr to go to home. 3411 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3412 } 3413 } 3414 3415 if (reason != null && 3416 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3417 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3418 ActivityRecord r = topRunningActivityLocked(null); 3419 if (r != null) { 3420 mNoAnimActivities.add(r); 3421 } 3422 } else { 3423 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3424 } 3425 mWindowManager.moveTaskToBottom(taskId); 3426 3427 if (VALIDATE_TOKENS) { 3428 validateAppTokensLocked(); 3429 } 3430 3431 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3432 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3433 final int taskToReturnTo = tr.getTaskToReturnTo(); 3434 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3435 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3436 } 3437 3438 mStackSupervisor.resumeTopActivitiesLocked(); 3439 return true; 3440 } 3441 3442 static final void logStartActivity(int tag, ActivityRecord r, 3443 TaskRecord task) { 3444 final Uri data = r.intent.getData(); 3445 final String strData = data != null ? data.toSafeString() : null; 3446 3447 EventLog.writeEvent(tag, 3448 r.userId, System.identityHashCode(r), task.taskId, 3449 r.shortComponentName, r.intent.getAction(), 3450 r.intent.getType(), strData, r.intent.getFlags()); 3451 } 3452 3453 /** 3454 * Make sure the given activity matches the current configuration. Returns 3455 * false if the activity had to be destroyed. Returns true if the 3456 * configuration is the same, or the activity will remain running as-is 3457 * for whatever reason. Ensures the HistoryRecord is updated with the 3458 * correct configuration and all other bookkeeping is handled. 3459 */ 3460 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3461 int globalChanges) { 3462 if (mConfigWillChange) { 3463 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3464 "Skipping config check (will change): " + r); 3465 return true; 3466 } 3467 3468 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3469 "Ensuring correct configuration: " + r); 3470 3471 // Short circuit: if the two configurations are the exact same 3472 // object (the common case), then there is nothing to do. 3473 Configuration newConfig = mService.mConfiguration; 3474 if (r.configuration == newConfig && !r.forceNewConfig) { 3475 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3476 "Configuration unchanged in " + r); 3477 return true; 3478 } 3479 3480 // We don't worry about activities that are finishing. 3481 if (r.finishing) { 3482 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3483 "Configuration doesn't matter in finishing " + r); 3484 r.stopFreezingScreenLocked(false); 3485 return true; 3486 } 3487 3488 // Okay we now are going to make this activity have the new config. 3489 // But then we need to figure out how it needs to deal with that. 3490 Configuration oldConfig = r.configuration; 3491 r.configuration = newConfig; 3492 3493 // Determine what has changed. May be nothing, if this is a config 3494 // that has come back from the app after going idle. In that case 3495 // we just want to leave the official config object now in the 3496 // activity and do nothing else. 3497 final int changes = oldConfig.diff(newConfig); 3498 if (changes == 0 && !r.forceNewConfig) { 3499 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3500 "Configuration no differences in " + r); 3501 return true; 3502 } 3503 3504 // If the activity isn't currently running, just leave the new 3505 // configuration and it will pick that up next time it starts. 3506 if (r.app == null || r.app.thread == null) { 3507 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3508 "Configuration doesn't matter not running " + r); 3509 r.stopFreezingScreenLocked(false); 3510 r.forceNewConfig = false; 3511 return true; 3512 } 3513 3514 // Figure out how to handle the changes between the configurations. 3515 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3516 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3517 + Integer.toHexString(changes) + ", handles=0x" 3518 + Integer.toHexString(r.info.getRealConfigChanged()) 3519 + ", newConfig=" + newConfig); 3520 } 3521 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3522 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3523 r.configChangeFlags |= changes; 3524 r.startFreezingScreenLocked(r.app, globalChanges); 3525 r.forceNewConfig = false; 3526 if (r.app == null || r.app.thread == null) { 3527 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3528 "Config is destroying non-running " + r); 3529 destroyActivityLocked(r, true, "config"); 3530 } else if (r.state == ActivityState.PAUSING) { 3531 // A little annoying: we are waiting for this activity to 3532 // finish pausing. Let's not do anything now, but just 3533 // flag that it needs to be restarted when done pausing. 3534 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3535 "Config is skipping already pausing " + r); 3536 r.configDestroy = true; 3537 return true; 3538 } else if (r.state == ActivityState.RESUMED) { 3539 // Try to optimize this case: the configuration is changing 3540 // and we need to restart the top, resumed activity. 3541 // Instead of doing the normal handshaking, just say 3542 // "restart!". 3543 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3544 "Config is relaunching resumed " + r); 3545 relaunchActivityLocked(r, r.configChangeFlags, true); 3546 r.configChangeFlags = 0; 3547 } else { 3548 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3549 "Config is relaunching non-resumed " + r); 3550 relaunchActivityLocked(r, r.configChangeFlags, false); 3551 r.configChangeFlags = 0; 3552 } 3553 3554 // All done... tell the caller we weren't able to keep this 3555 // activity around. 3556 return false; 3557 } 3558 3559 // Default case: the activity can handle this new configuration, so 3560 // hand it over. Note that we don't need to give it the new 3561 // configuration, since we always send configuration changes to all 3562 // process when they happen so it can just use whatever configuration 3563 // it last got. 3564 if (r.app != null && r.app.thread != null) { 3565 try { 3566 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3567 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3568 } catch (RemoteException e) { 3569 // If process died, whatever. 3570 } 3571 } 3572 r.stopFreezingScreenLocked(false); 3573 3574 return true; 3575 } 3576 3577 private boolean relaunchActivityLocked(ActivityRecord r, 3578 int changes, boolean andResume) { 3579 List<ResultInfo> results = null; 3580 List<Intent> newIntents = null; 3581 if (andResume) { 3582 results = r.results; 3583 newIntents = r.newIntents; 3584 } 3585 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3586 + " with results=" + results + " newIntents=" + newIntents 3587 + " andResume=" + andResume); 3588 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3589 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3590 r.task.taskId, r.shortComponentName); 3591 3592 r.startFreezingScreenLocked(r.app, 0); 3593 3594 mStackSupervisor.removeChildActivityContainers(r); 3595 3596 try { 3597 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3598 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3599 + r); 3600 r.forceNewConfig = false; 3601 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3602 changes, !andResume, new Configuration(mService.mConfiguration)); 3603 // Note: don't need to call pauseIfSleepingLocked() here, because 3604 // the caller will only pass in 'andResume' if this activity is 3605 // currently resumed, which implies we aren't sleeping. 3606 } catch (RemoteException e) { 3607 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3608 } 3609 3610 if (andResume) { 3611 r.results = null; 3612 r.newIntents = null; 3613 r.state = ActivityState.RESUMED; 3614 } else { 3615 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3616 r.state = ActivityState.PAUSED; 3617 } 3618 3619 return true; 3620 } 3621 3622 boolean willActivityBeVisibleLocked(IBinder token) { 3623 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3624 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3625 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3626 final ActivityRecord r = activities.get(activityNdx); 3627 if (r.appToken == token) { 3628 return true; 3629 } 3630 if (r.fullscreen && !r.finishing) { 3631 return false; 3632 } 3633 } 3634 } 3635 final ActivityRecord r = ActivityRecord.forToken(token); 3636 if (r == null) { 3637 return false; 3638 } 3639 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3640 + " would have returned true for r=" + r); 3641 return !r.finishing; 3642 } 3643 3644 void closeSystemDialogsLocked() { 3645 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3646 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3647 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3648 final ActivityRecord r = activities.get(activityNdx); 3649 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3650 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3651 } 3652 } 3653 } 3654 } 3655 3656 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3657 boolean didSomething = false; 3658 TaskRecord lastTask = null; 3659 ComponentName homeActivity = null; 3660 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3661 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3662 int numActivities = activities.size(); 3663 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3664 ActivityRecord r = activities.get(activityNdx); 3665 final boolean samePackage = r.packageName.equals(name) 3666 || (name == null && r.userId == userId); 3667 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3668 && (samePackage || r.task == lastTask) 3669 && (r.app == null || evenPersistent || !r.app.persistent)) { 3670 if (!doit) { 3671 if (r.finishing) { 3672 // If this activity is just finishing, then it is not 3673 // interesting as far as something to stop. 3674 continue; 3675 } 3676 return true; 3677 } 3678 if (r.isHomeActivity()) { 3679 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3680 Slog.i(TAG, "Skip force-stop again " + r); 3681 continue; 3682 } else { 3683 homeActivity = r.realActivity; 3684 } 3685 } 3686 didSomething = true; 3687 Slog.i(TAG, " Force finishing activity " + r); 3688 if (samePackage) { 3689 if (r.app != null) { 3690 r.app.removed = true; 3691 } 3692 r.app = null; 3693 } 3694 lastTask = r.task; 3695 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3696 true)) { 3697 // r has been deleted from mActivities, accommodate. 3698 --numActivities; 3699 --activityNdx; 3700 } 3701 } 3702 } 3703 } 3704 return didSomething; 3705 } 3706 3707 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3708 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3709 final TaskRecord task = mTaskHistory.get(taskNdx); 3710 ActivityRecord r = null; 3711 ActivityRecord top = null; 3712 int numActivities = 0; 3713 int numRunning = 0; 3714 final ArrayList<ActivityRecord> activities = task.mActivities; 3715 if (activities.isEmpty()) { 3716 continue; 3717 } 3718 if (!allowed && !task.isHomeTask() && task.creatorUid != callingUid) { 3719 continue; 3720 } 3721 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3722 r = activities.get(activityNdx); 3723 3724 // Initialize state for next task if needed. 3725 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3726 top = r; 3727 numActivities = numRunning = 0; 3728 } 3729 3730 // Add 'r' into the current task. 3731 numActivities++; 3732 if (r.app != null && r.app.thread != null) { 3733 numRunning++; 3734 } 3735 3736 if (localLOGV) Slog.v( 3737 TAG, r.intent.getComponent().flattenToShortString() 3738 + ": task=" + r.task); 3739 } 3740 3741 RunningTaskInfo ci = new RunningTaskInfo(); 3742 ci.id = task.taskId; 3743 ci.baseActivity = r.intent.getComponent(); 3744 ci.topActivity = top.intent.getComponent(); 3745 ci.lastActiveTime = task.lastActiveTime; 3746 3747 if (top.task != null) { 3748 ci.description = top.task.lastDescription; 3749 } 3750 ci.numActivities = numActivities; 3751 ci.numRunning = numRunning; 3752 //System.out.println( 3753 // "#" + maxNum + ": " + " descr=" + ci.description); 3754 list.add(ci); 3755 } 3756 } 3757 3758 public void unhandledBackLocked() { 3759 final int top = mTaskHistory.size() - 1; 3760 if (DEBUG_SWITCH) Slog.d( 3761 TAG, "Performing unhandledBack(): top activity at " + top); 3762 if (top >= 0) { 3763 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3764 int activityTop = activities.size() - 1; 3765 if (activityTop > 0) { 3766 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3767 "unhandled-back", true); 3768 } 3769 } 3770 } 3771 3772 /** 3773 * Reset local parameters because an app's activity died. 3774 * @param app The app of the activity that died. 3775 * @return result from removeHistoryRecordsForAppLocked. 3776 */ 3777 boolean handleAppDiedLocked(ProcessRecord app) { 3778 if (mPausingActivity != null && mPausingActivity.app == app) { 3779 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3780 "App died while pausing: " + mPausingActivity); 3781 mPausingActivity = null; 3782 } 3783 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3784 mLastPausedActivity = null; 3785 mLastNoHistoryActivity = null; 3786 } 3787 3788 return removeHistoryRecordsForAppLocked(app); 3789 } 3790 3791 void handleAppCrashLocked(ProcessRecord app) { 3792 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3793 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3794 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3795 final ActivityRecord r = activities.get(activityNdx); 3796 if (r.app == app) { 3797 Slog.w(TAG, " Force finishing activity " 3798 + r.intent.getComponent().flattenToShortString()); 3799 // Force the destroy to skip right to removal. 3800 r.app = null; 3801 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3802 } 3803 } 3804 } 3805 } 3806 3807 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3808 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3809 boolean printed = false; 3810 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3811 final TaskRecord task = mTaskHistory.get(taskNdx); 3812 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3813 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3814 dumpClient, dumpPackage, needSep, header, 3815 " Task id #" + task.taskId); 3816 if (printed) { 3817 header = null; 3818 } 3819 } 3820 return printed; 3821 } 3822 3823 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3824 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3825 3826 if ("all".equals(name)) { 3827 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3828 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3829 } 3830 } else if ("top".equals(name)) { 3831 final int top = mTaskHistory.size() - 1; 3832 if (top >= 0) { 3833 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3834 int listTop = list.size() - 1; 3835 if (listTop >= 0) { 3836 activities.add(list.get(listTop)); 3837 } 3838 } 3839 } else { 3840 ItemMatcher matcher = new ItemMatcher(); 3841 matcher.build(name); 3842 3843 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3844 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3845 if (matcher.match(r1, r1.intent.getComponent())) { 3846 activities.add(r1); 3847 } 3848 } 3849 } 3850 } 3851 3852 return activities; 3853 } 3854 3855 ActivityRecord restartPackage(String packageName) { 3856 ActivityRecord starting = topRunningActivityLocked(null); 3857 3858 // All activities that came from the package must be 3859 // restarted as if there was a config change. 3860 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3861 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3862 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3863 final ActivityRecord a = activities.get(activityNdx); 3864 if (a.info.packageName.equals(packageName)) { 3865 a.forceNewConfig = true; 3866 if (starting != null && a == starting && a.visible) { 3867 a.startFreezingScreenLocked(starting.app, 3868 ActivityInfo.CONFIG_SCREEN_LAYOUT); 3869 } 3870 } 3871 } 3872 } 3873 3874 return starting; 3875 } 3876 3877 void removeTask(TaskRecord task) { 3878 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 3879 mWindowManager.removeTask(task.taskId); 3880 final ActivityRecord r = mResumedActivity; 3881 if (r != null && r.task == task) { 3882 mResumedActivity = null; 3883 } 3884 3885 final int taskNdx = mTaskHistory.indexOf(task); 3886 final int topTaskNdx = mTaskHistory.size() - 1; 3887 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 3888 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 3889 if (!nextTask.isOverHomeStack()) { 3890 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3891 } 3892 } 3893 mTaskHistory.remove(task); 3894 updateTaskMovement(task, true); 3895 3896 if (task.mActivities.isEmpty()) { 3897 final boolean isVoiceSession = task.voiceSession != null; 3898 if (isVoiceSession) { 3899 try { 3900 task.voiceSession.taskFinished(task.intent, task.taskId); 3901 } catch (RemoteException e) { 3902 } 3903 } 3904 if (task.autoRemoveFromRecents() || isVoiceSession) { 3905 // Task creator asked to remove this when done, or this task was a voice 3906 // interaction, so it should not remain on the recent tasks list. 3907 mService.mRecentTasks.remove(task); 3908 task.closeRecentsChain(); 3909 } 3910 } 3911 3912 if (mTaskHistory.isEmpty()) { 3913 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 3914 if (isOnHomeDisplay()) { 3915 mStackSupervisor.moveHomeStack(!isHomeStack()); 3916 } 3917 if (mStacks != null) { 3918 mStacks.remove(this); 3919 mStacks.add(0, this); 3920 } 3921 mActivityContainer.onTaskListEmptyLocked(); 3922 } 3923 } 3924 3925 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 3926 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 3927 boolean toTop) { 3928 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 3929 voiceInteractor); 3930 addTask(task, toTop, false); 3931 return task; 3932 } 3933 3934 ArrayList<TaskRecord> getAllTasks() { 3935 return new ArrayList<TaskRecord>(mTaskHistory); 3936 } 3937 3938 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 3939 task.stack = this; 3940 if (toTop) { 3941 insertTaskAtTop(task); 3942 } else { 3943 mTaskHistory.add(0, task); 3944 updateTaskMovement(task, false); 3945 } 3946 if (!moving && task.voiceSession != null) { 3947 try { 3948 task.voiceSession.taskStarted(task.intent, task.taskId); 3949 } catch (RemoteException e) { 3950 } 3951 } 3952 } 3953 3954 public int getStackId() { 3955 return mStackId; 3956 } 3957 3958 @Override 3959 public String toString() { 3960 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 3961 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 3962 } 3963} 3964