ActivityStack.java revision 0175b882b5e021907c307ab0e455bff014ad8784
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_RELEASE; 40import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 41import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS; 42import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 43import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 44 45import android.util.ArraySet; 46import com.android.internal.app.IVoiceInteractor; 47import com.android.internal.os.BatteryStatsImpl; 48import com.android.server.Watchdog; 49import com.android.server.am.ActivityManagerService.ItemMatcher; 50import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 51import com.android.server.wm.AppTransition; 52import com.android.server.wm.TaskGroup; 53import com.android.server.wm.WindowManagerService; 54 55import android.app.Activity; 56import android.app.ActivityManager; 57import android.app.ActivityOptions; 58import android.app.AppGlobals; 59import android.app.IActivityController; 60import android.app.ResultInfo; 61import android.app.ActivityManager.RunningTaskInfo; 62import android.content.ComponentName; 63import android.content.Intent; 64import android.content.pm.ActivityInfo; 65import android.content.pm.PackageManager; 66import android.content.res.Configuration; 67import android.content.res.Resources; 68import android.graphics.Bitmap; 69import android.net.Uri; 70import android.os.Binder; 71import android.os.Bundle; 72import android.os.Debug; 73import android.os.Handler; 74import android.os.IBinder; 75import android.os.Looper; 76import android.os.Message; 77import android.os.PersistableBundle; 78import android.os.RemoteException; 79import android.os.SystemClock; 80import android.os.Trace; 81import android.os.UserHandle; 82import android.service.voice.IVoiceInteractionSession; 83import android.util.EventLog; 84import android.util.Slog; 85import android.view.Display; 86 87import java.io.FileDescriptor; 88import java.io.PrintWriter; 89import java.lang.ref.WeakReference; 90import java.util.ArrayList; 91import java.util.Iterator; 92import java.util.List; 93import java.util.Objects; 94 95/** 96 * State and management of a single stack of activities. 97 */ 98final class ActivityStack { 99 100 // Ticks during which we check progress while waiting for an app to launch. 101 static final int LAUNCH_TICK = 500; 102 103 // How long we wait until giving up on the last activity to pause. This 104 // is short because it directly impacts the responsiveness of starting the 105 // next activity. 106 static final int PAUSE_TIMEOUT = 500; 107 108 // How long we wait for the activity to tell us it has stopped before 109 // giving up. This is a good amount of time because we really need this 110 // from the application in order to get its saved state. 111 static final int STOP_TIMEOUT = 10*1000; 112 113 // How long we wait until giving up on an activity telling us it has 114 // finished destroying itself. 115 static final int DESTROY_TIMEOUT = 10*1000; 116 117 // How long until we reset a task when the user returns to it. Currently 118 // disabled. 119 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 120 121 // How long between activity launches that we consider safe to not warn 122 // the user about an unexpected activity being launched on top. 123 static final long START_WARN_TIME = 5*1000; 124 125 // Set to false to disable the preview that is shown while a new activity 126 // is being started. 127 static final boolean SHOW_APP_STARTING_PREVIEW = true; 128 129 // How long to wait for all background Activities to redraw following a call to 130 // convertToTranslucent(). 131 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 132 133 static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic(); 134 135 enum ActivityState { 136 INITIALIZING, 137 RESUMED, 138 PAUSING, 139 PAUSED, 140 STOPPING, 141 STOPPED, 142 FINISHING, 143 DESTROYING, 144 DESTROYED 145 } 146 147 final ActivityManagerService mService; 148 final WindowManagerService mWindowManager; 149 150 /** 151 * The back history of all previous (and possibly still 152 * running) activities. It contains #TaskRecord objects. 153 */ 154 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 155 156 /** 157 * Used for validating app tokens with window manager. 158 */ 159 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 160 161 /** 162 * List of running activities, sorted by recent usage. 163 * The first entry in the list is the least recently used. 164 * It contains HistoryRecord objects. 165 */ 166 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 167 168 /** 169 * Animations that for the current transition have requested not to 170 * be considered for the transition animation. 171 */ 172 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 173 174 /** 175 * When we are in the process of pausing an activity, before starting the 176 * next one, this variable holds the activity that is currently being paused. 177 */ 178 ActivityRecord mPausingActivity = null; 179 180 /** 181 * This is the last activity that we put into the paused state. This is 182 * used to determine if we need to do an activity transition while sleeping, 183 * when we normally hold the top activity paused. 184 */ 185 ActivityRecord mLastPausedActivity = null; 186 187 /** 188 * Activities that specify No History must be removed once the user navigates away from them. 189 * If the device goes to sleep with such an activity in the paused state then we save it here 190 * and finish it later if another activity replaces it on wakeup. 191 */ 192 ActivityRecord mLastNoHistoryActivity = null; 193 194 /** 195 * Current activity that is resumed, or null if there is none. 196 */ 197 ActivityRecord mResumedActivity = null; 198 199 /** 200 * This is the last activity that has been started. It is only used to 201 * identify when multiple activities are started at once so that the user 202 * can be warned they may not be in the activity they think they are. 203 */ 204 ActivityRecord mLastStartedActivity = null; 205 206 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 207 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 208 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 209 // Activity in mTranslucentActivityWaiting is notified via 210 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 211 // background activity being drawn then the same call will be made with a true value. 212 ActivityRecord mTranslucentActivityWaiting = null; 213 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 214 new ArrayList<ActivityRecord>(); 215 216 /** 217 * Set when we know we are going to be calling updateConfiguration() 218 * soon, so want to skip intermediate config checks. 219 */ 220 boolean mConfigWillChange; 221 222 long mLaunchStartTime = 0; 223 long mFullyDrawnStartTime = 0; 224 225 /** 226 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 227 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 228 */ 229 private ActivityRecord mLastScreenshotActivity = null; 230 private Bitmap mLastScreenshotBitmap = null; 231 232 int mCurrentUser; 233 234 final int mStackId; 235 final ActivityContainer mActivityContainer; 236 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 237 ArrayList<ActivityStack> mStacks; 238 /** The attached Display's unique identifier, or -1 if detached */ 239 int mDisplayId; 240 241 /** Run all ActivityStacks through this */ 242 final ActivityStackSupervisor mStackSupervisor; 243 244 /** Used to keep resumeTopActivityLocked() from being entered recursively */ 245 private boolean inResumeTopActivity; 246 247 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 248 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 249 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 250 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 251 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 252 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 253 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 254 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 255 256 static class ScheduleDestroyArgs { 257 final ProcessRecord mOwner; 258 final String mReason; 259 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 260 mOwner = owner; 261 mReason = reason; 262 } 263 } 264 265 final Handler mHandler; 266 267 final class ActivityStackHandler extends Handler { 268 //public Handler() { 269 // if (localLOGV) Slog.v(TAG, "Handler started!"); 270 //} 271 ActivityStackHandler(Looper looper) { 272 super(looper); 273 } 274 275 @Override 276 public void handleMessage(Message msg) { 277 switch (msg.what) { 278 case PAUSE_TIMEOUT_MSG: { 279 ActivityRecord r = (ActivityRecord)msg.obj; 280 // We don't at this point know if the activity is fullscreen, 281 // so we need to be conservative and assume it isn't. 282 Slog.w(TAG, "Activity pause timeout for " + r); 283 synchronized (mService) { 284 if (r.app != null) { 285 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 286 } 287 activityPausedLocked(r.appToken, true, r.persistentState); 288 } 289 } break; 290 case LAUNCH_TICK_MSG: { 291 ActivityRecord r = (ActivityRecord)msg.obj; 292 synchronized (mService) { 293 if (r.continueLaunchTickingLocked()) { 294 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 295 } 296 } 297 } break; 298 case DESTROY_TIMEOUT_MSG: { 299 ActivityRecord r = (ActivityRecord)msg.obj; 300 // We don't at this point know if the activity is fullscreen, 301 // so we need to be conservative and assume it isn't. 302 Slog.w(TAG, "Activity destroy timeout for " + r); 303 synchronized (mService) { 304 activityDestroyedLocked(r != null ? r.appToken : null); 305 } 306 } break; 307 case STOP_TIMEOUT_MSG: { 308 ActivityRecord r = (ActivityRecord)msg.obj; 309 // We don't at this point know if the activity is fullscreen, 310 // so we need to be conservative and assume it isn't. 311 Slog.w(TAG, "Activity stop timeout for " + r); 312 synchronized (mService) { 313 if (r.isInHistory()) { 314 activityStoppedLocked(r, null, null, null); 315 } 316 } 317 } break; 318 case DESTROY_ACTIVITIES_MSG: { 319 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 320 synchronized (mService) { 321 destroyActivitiesLocked(args.mOwner, args.mReason); 322 } 323 } break; 324 case TRANSLUCENT_TIMEOUT_MSG: { 325 synchronized (mService) { 326 notifyActivityDrawnLocked(null); 327 } 328 } break; 329 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 330 synchronized (mService) { 331 final ActivityRecord r = getVisibleBehindActivity(); 332 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 333 if (r != null) { 334 mService.killAppAtUsersRequest(r.app, null); 335 } 336 } 337 } break; 338 } 339 } 340 } 341 342 int numActivities() { 343 int count = 0; 344 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 345 count += mTaskHistory.get(taskNdx).mActivities.size(); 346 } 347 return count; 348 } 349 350 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 351 mActivityContainer = activityContainer; 352 mStackSupervisor = activityContainer.getOuter(); 353 mService = mStackSupervisor.mService; 354 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 355 mWindowManager = mService.mWindowManager; 356 mStackId = activityContainer.mStackId; 357 mCurrentUser = mService.mCurrentUserId; 358 } 359 360 /** 361 * Checks whether the userid is a profile of the current user. 362 */ 363 private boolean isCurrentProfileLocked(int userId) { 364 if (userId == mCurrentUser) return true; 365 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 366 if (mService.mCurrentProfileIds[i] == userId) return true; 367 } 368 return false; 369 } 370 371 boolean okToShowLocked(ActivityRecord r) { 372 return isCurrentProfileLocked(r.userId) 373 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 374 } 375 376 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 377 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 378 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 379 if (r != null) { 380 return r; 381 } 382 } 383 return null; 384 } 385 386 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 387 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 388 final TaskRecord task = mTaskHistory.get(taskNdx); 389 final ArrayList<ActivityRecord> activities = task.mActivities; 390 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 391 ActivityRecord r = activities.get(activityNdx); 392 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 393 return r; 394 } 395 } 396 } 397 return null; 398 } 399 400 /** 401 * This is a simplified version of topRunningActivityLocked that provides a number of 402 * optional skip-over modes. It is intended for use with the ActivityController hook only. 403 * 404 * @param token If non-null, any history records matching this token will be skipped. 405 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 406 * 407 * @return Returns the HistoryRecord of the next activity on the stack. 408 */ 409 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 410 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 411 TaskRecord task = mTaskHistory.get(taskNdx); 412 if (task.taskId == taskId) { 413 continue; 414 } 415 ArrayList<ActivityRecord> activities = task.mActivities; 416 for (int i = activities.size() - 1; i >= 0; --i) { 417 final ActivityRecord r = activities.get(i); 418 // Note: the taskId check depends on real taskId fields being non-zero 419 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 420 return r; 421 } 422 } 423 } 424 return null; 425 } 426 427 final ActivityRecord topActivity() { 428 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 429 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 430 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 431 final ActivityRecord r = activities.get(activityNdx); 432 if (!r.finishing) { 433 return r; 434 } 435 } 436 } 437 return null; 438 } 439 440 final TaskRecord topTask() { 441 final int size = mTaskHistory.size(); 442 if (size > 0) { 443 return mTaskHistory.get(size - 1); 444 } 445 return null; 446 } 447 448 TaskRecord taskForIdLocked(int id) { 449 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 450 final TaskRecord task = mTaskHistory.get(taskNdx); 451 if (task.taskId == id) { 452 return task; 453 } 454 } 455 return null; 456 } 457 458 ActivityRecord isInStackLocked(IBinder token) { 459 final ActivityRecord r = ActivityRecord.forToken(token); 460 if (r != null) { 461 final TaskRecord task = r.task; 462 if (task != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 463 if (task.stack != this) Slog.w(TAG, 464 "Illegal state! task does not point to stack it is in."); 465 return r; 466 } 467 } 468 return null; 469 } 470 471 final boolean updateLRUListLocked(ActivityRecord r) { 472 final boolean hadit = mLRUActivities.remove(r); 473 mLRUActivities.add(r); 474 return hadit; 475 } 476 477 final boolean isHomeStack() { 478 return mStackId == HOME_STACK_ID; 479 } 480 481 final boolean isOnHomeDisplay() { 482 return isAttached() && 483 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 484 } 485 486 final void moveToFront() { 487 if (isAttached()) { 488 if (isOnHomeDisplay()) { 489 mStackSupervisor.moveHomeStack(isHomeStack()); 490 } 491 mStacks.remove(this); 492 mStacks.add(this); 493 } 494 } 495 496 final boolean isAttached() { 497 return mStacks != null; 498 } 499 500 /** 501 * Returns the top activity in any existing task matching the given 502 * Intent. Returns null if no such task is found. 503 */ 504 ActivityRecord findTaskLocked(ActivityRecord target) { 505 Intent intent = target.intent; 506 ActivityInfo info = target.info; 507 ComponentName cls = intent.getComponent(); 508 if (info.targetActivity != null) { 509 cls = new ComponentName(info.packageName, info.targetActivity); 510 } 511 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 512 boolean isDocument = intent != null & intent.isDocument(); 513 // If documentData is non-null then it must match the existing task data. 514 Uri documentData = isDocument ? intent.getData() : null; 515 516 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 517 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 518 final TaskRecord task = mTaskHistory.get(taskNdx); 519 if (task.voiceSession != null) { 520 // We never match voice sessions; those always run independently. 521 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 522 continue; 523 } 524 if (task.userId != userId) { 525 // Looking for a different task. 526 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 527 continue; 528 } 529 final ActivityRecord r = task.getTopActivity(); 530 if (r == null || r.finishing || r.userId != userId || 531 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 532 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 533 continue; 534 } 535 536 final Intent taskIntent = task.intent; 537 final Intent affinityIntent = task.affinityIntent; 538 final boolean taskIsDocument; 539 final Uri taskDocumentData; 540 if (taskIntent != null && taskIntent.isDocument()) { 541 taskIsDocument = true; 542 taskDocumentData = taskIntent.getData(); 543 } else if (affinityIntent != null && affinityIntent.isDocument()) { 544 taskIsDocument = true; 545 taskDocumentData = affinityIntent.getData(); 546 } else { 547 taskIsDocument = false; 548 taskDocumentData = null; 549 } 550 551 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 552 + taskIntent.getComponent().flattenToShortString() 553 + "/aff=" + r.task.affinity + " to new cls=" 554 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 555 if (!isDocument && !taskIsDocument && task.affinity != null) { 556 if (task.affinity.equals(target.taskAffinity)) { 557 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 558 return r; 559 } 560 } else if (taskIntent != null && taskIntent.getComponent() != null && 561 taskIntent.getComponent().compareTo(cls) == 0 && 562 Objects.equals(documentData, taskDocumentData)) { 563 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 564 //dump(); 565 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 566 + r.intent); 567 return r; 568 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 569 affinityIntent.getComponent().compareTo(cls) == 0 && 570 Objects.equals(documentData, taskDocumentData)) { 571 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 572 //dump(); 573 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 574 + r.intent); 575 return r; 576 } else if (DEBUG_TASKS) { 577 Slog.d(TAG, "Not a match: " + task); 578 } 579 } 580 581 return null; 582 } 583 584 /** 585 * Returns the first activity (starting from the top of the stack) that 586 * is the same as the given activity. Returns null if no such activity 587 * is found. 588 */ 589 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 590 ComponentName cls = intent.getComponent(); 591 if (info.targetActivity != null) { 592 cls = new ComponentName(info.packageName, info.targetActivity); 593 } 594 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 595 596 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 597 TaskRecord task = mTaskHistory.get(taskNdx); 598 if (!isCurrentProfileLocked(task.userId)) { 599 return null; 600 } 601 final ArrayList<ActivityRecord> activities = task.mActivities; 602 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 603 ActivityRecord r = activities.get(activityNdx); 604 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 605 //Slog.i(TAG, "Found matching class!"); 606 //dump(); 607 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 608 return r; 609 } 610 } 611 } 612 613 return null; 614 } 615 616 /* 617 * Move the activities around in the stack to bring a user to the foreground. 618 */ 619 final void switchUserLocked(int userId) { 620 if (mCurrentUser == userId) { 621 return; 622 } 623 mCurrentUser = userId; 624 625 // Move userId's tasks to the top. 626 int index = mTaskHistory.size(); 627 for (int i = 0; i < index; ) { 628 TaskRecord task = mTaskHistory.get(i); 629 if (isCurrentProfileLocked(task.userId)) { 630 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 631 " moving " + task + " to top"); 632 mTaskHistory.remove(i); 633 mTaskHistory.add(task); 634 --index; 635 // Use same value for i. 636 } else { 637 ++i; 638 } 639 } 640 if (VALIDATE_TOKENS) { 641 validateAppTokensLocked(); 642 } 643 } 644 645 void minimalResumeActivityLocked(ActivityRecord r) { 646 r.state = ActivityState.RESUMED; 647 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 648 + " (starting new instance)"); 649 r.stopped = false; 650 mResumedActivity = r; 651 r.task.touchActiveTime(); 652 mService.addRecentTaskLocked(r.task); 653 completeResumeLocked(r); 654 mStackSupervisor.checkReadyForSleepLocked(); 655 setLaunchTime(r); 656 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 657 } 658 659 private void startLaunchTraces() { 660 if (mFullyDrawnStartTime != 0) { 661 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 662 } 663 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 664 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 665 } 666 667 private void stopFullyDrawnTraceIfNeeded() { 668 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 669 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 670 mFullyDrawnStartTime = 0; 671 } 672 } 673 674 void setLaunchTime(ActivityRecord r) { 675 if (r.displayStartTime == 0) { 676 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 677 if (mLaunchStartTime == 0) { 678 startLaunchTraces(); 679 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 680 } 681 } else if (mLaunchStartTime == 0) { 682 startLaunchTraces(); 683 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 684 } 685 } 686 687 void clearLaunchTime(ActivityRecord r) { 688 // Make sure that there is no activity waiting for this to launch. 689 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 690 r.displayStartTime = r.fullyDrawnStartTime = 0; 691 } else { 692 mStackSupervisor.removeTimeoutsForActivityLocked(r); 693 mStackSupervisor.scheduleIdleTimeoutLocked(r); 694 } 695 } 696 697 void awakeFromSleepingLocked() { 698 // Ensure activities are no longer sleeping. 699 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 700 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 701 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 702 activities.get(activityNdx).setSleeping(false); 703 } 704 } 705 } 706 707 /** 708 * @return true if something must be done before going to sleep. 709 */ 710 boolean checkReadyForSleepLocked() { 711 if (mResumedActivity != null) { 712 // Still have something resumed; can't sleep until it is paused. 713 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 714 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 715 startPausingLocked(false, true); 716 return true; 717 } 718 if (mPausingActivity != null) { 719 // Still waiting for something to pause; can't sleep yet. 720 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 721 return true; 722 } 723 724 return false; 725 } 726 727 void goToSleep() { 728 ensureActivitiesVisibleLocked(null, 0); 729 730 // Make sure any stopped but visible activities are now sleeping. 731 // This ensures that the activity's onStop() is called. 732 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 733 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 734 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 735 final ActivityRecord r = activities.get(activityNdx); 736 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 737 r.setSleeping(true); 738 } 739 } 740 } 741 } 742 743 /** 744 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 745 * again when requested. 746 */ 747 private void invalidateLastScreenshot() { 748 mLastScreenshotActivity = null; 749 if (mLastScreenshotBitmap != null) { 750 mLastScreenshotBitmap.recycle(); 751 } 752 mLastScreenshotBitmap = null; 753 } 754 755 public final Bitmap screenshotActivities(ActivityRecord who) { 756 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 757 if (who.noDisplay) { 758 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 759 return null; 760 } 761 762 if (isHomeStack()) { 763 // This is an optimization -- since we never show Home or Recents within Recents itself, 764 // we can just go ahead and skip taking the screenshot if this is the home stack. In 765 // the case where the most recent task is not the task that was supplied, then the stack 766 // has changed, so invalidate the last screenshot(). 767 invalidateLastScreenshot(); 768 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 769 return null; 770 } 771 772 int w = mService.mThumbnailWidth; 773 int h = mService.mThumbnailHeight; 774 if (w > 0) { 775 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 776 || mLastScreenshotActivity.state == ActivityState.RESUMED 777 || mLastScreenshotBitmap.getWidth() != w 778 || mLastScreenshotBitmap.getHeight() != h) { 779 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 780 mLastScreenshotActivity = who; 781 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 782 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 783 } 784 if (mLastScreenshotBitmap != null) { 785 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 786 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 787 } 788 } 789 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 790 return null; 791 } 792 793 final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { 794 if (mPausingActivity != null) { 795 Slog.e(TAG, "Trying to pause when pause is already pending for " 796 + mPausingActivity, new RuntimeException("here").fillInStackTrace()); 797 } 798 ActivityRecord prev = mResumedActivity; 799 if (prev == null) { 800 Slog.e(TAG, "Trying to pause when nothing is resumed", 801 new RuntimeException("here").fillInStackTrace()); 802 mStackSupervisor.resumeTopActivitiesLocked(); 803 return; 804 } 805 806 if (mActivityContainer.mParentActivity == null) { 807 // Top level stack, not a child. Look for child stacks. 808 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping); 809 } 810 811 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 812 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 813 mResumedActivity = null; 814 mPausingActivity = prev; 815 mLastPausedActivity = prev; 816 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 817 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 818 prev.state = ActivityState.PAUSING; 819 prev.task.touchActiveTime(); 820 clearLaunchTime(prev); 821 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 822 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task)) { 823 prev.updateThumbnail(screenshotActivities(prev), null); 824 } 825 stopFullyDrawnTraceIfNeeded(); 826 827 mService.updateCpuStats(); 828 829 if (prev.app != null && prev.app.thread != null) { 830 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 831 try { 832 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 833 prev.userId, System.identityHashCode(prev), 834 prev.shortComponentName); 835 mService.updateUsageStats(prev, false); 836 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 837 userLeaving, prev.configChangeFlags); 838 } catch (Exception e) { 839 // Ignore exception, if process died other code will cleanup. 840 Slog.w(TAG, "Exception thrown during pause", e); 841 mPausingActivity = null; 842 mLastPausedActivity = null; 843 mLastNoHistoryActivity = null; 844 } 845 } else { 846 mPausingActivity = null; 847 mLastPausedActivity = null; 848 mLastNoHistoryActivity = null; 849 } 850 851 // If we are not going to sleep, we want to ensure the device is 852 // awake until the next activity is started. 853 if (!mService.isSleepingOrShuttingDown()) { 854 mStackSupervisor.acquireLaunchWakelock(); 855 } 856 857 if (mPausingActivity != null) { 858 // Have the window manager pause its key dispatching until the new 859 // activity has started. If we're pausing the activity just because 860 // the screen is being turned off and the UI is sleeping, don't interrupt 861 // key dispatch; the same activity will pick it up again on wakeup. 862 if (!uiSleeping) { 863 prev.pauseKeyDispatchingLocked(); 864 } else { 865 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 866 } 867 868 // Schedule a pause timeout in case the app doesn't respond. 869 // We don't give it much time because this directly impacts the 870 // responsiveness seen by the user. 871 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 872 msg.obj = prev; 873 prev.pauseTime = SystemClock.uptimeMillis(); 874 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 875 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 876 } else { 877 // This activity failed to schedule the 878 // pause, so just treat it as being paused now. 879 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 880 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 881 } 882 } 883 884 final void activityPausedLocked(IBinder token, boolean timeout, 885 PersistableBundle persistentState) { 886 if (DEBUG_PAUSE) Slog.v( 887 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 888 889 final ActivityRecord r = isInStackLocked(token); 890 if (r != null) { 891 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 892 if (persistentState != null) { 893 r.persistentState = persistentState; 894 mService.notifyTaskPersisterLocked(r.task, false); 895 } 896 if (mPausingActivity == r) { 897 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 898 + (timeout ? " (due to timeout)" : " (pause complete)")); 899 r.state = ActivityState.PAUSED; 900 completePauseLocked(); 901 } else { 902 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 903 r.userId, System.identityHashCode(r), r.shortComponentName, 904 mPausingActivity != null 905 ? mPausingActivity.shortComponentName : "(none)"); 906 } 907 } 908 } 909 910 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 911 PersistableBundle persistentState, CharSequence description) { 912 if (r.state != ActivityState.STOPPING) { 913 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 914 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 915 return; 916 } 917 if (persistentState != null) { 918 r.persistentState = persistentState; 919 mService.notifyTaskPersisterLocked(r.task, false); 920 } 921 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 922 if (icicle != null) { 923 // If icicle is null, this is happening due to a timeout, so we 924 // haven't really saved the state. 925 r.icicle = icicle; 926 r.haveState = true; 927 r.launchCount = 0; 928 r.updateThumbnail(null, description); 929 } 930 if (!r.stopped) { 931 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 932 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 933 r.stopped = true; 934 r.state = ActivityState.STOPPED; 935 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 936 mStackSupervisor.requestVisibleBehindLocked(r, false); 937 } 938 if (r.finishing) { 939 r.clearOptionsLocked(); 940 } else { 941 if (r.configDestroy) { 942 destroyActivityLocked(r, true, "stop-config"); 943 mStackSupervisor.resumeTopActivitiesLocked(); 944 } else { 945 mStackSupervisor.updatePreviousProcessLocked(r); 946 } 947 } 948 } 949 } 950 951 private void completePauseLocked() { 952 ActivityRecord prev = mPausingActivity; 953 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 954 955 if (prev != null) { 956 if (prev.finishing) { 957 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 958 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 959 } else if (prev.app != null) { 960 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 961 if (prev.waitingVisible) { 962 prev.waitingVisible = false; 963 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 964 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 965 TAG, "Complete pause, no longer waiting: " + prev); 966 } 967 if (prev.configDestroy) { 968 // The previous is being paused because the configuration 969 // is changing, which means it is actually stopping... 970 // To juggle the fact that we are also starting a new 971 // instance right now, we need to first completely stop 972 // the current instance before starting the new one. 973 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 974 destroyActivityLocked(prev, true, "pause-config"); 975 } else if (!hasVisibleBehindActivity()) { 976 // If we were visible then resumeTopActivities will release resources before 977 // stopping. 978 mStackSupervisor.mStoppingActivities.add(prev); 979 if (mStackSupervisor.mStoppingActivities.size() > 3 || 980 prev.frontOfTask && mTaskHistory.size() <= 1) { 981 // If we already have a few activities waiting to stop, 982 // then give up on things going idle and start clearing 983 // them out. Or if r is the last of activity of the last task the stack 984 // will be empty and must be cleared immediately. 985 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 986 mStackSupervisor.scheduleIdleLocked(); 987 } else { 988 mStackSupervisor.checkReadyForSleepLocked(); 989 } 990 } 991 } else { 992 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 993 prev = null; 994 } 995 mPausingActivity = null; 996 } 997 998 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 999 if (!mService.isSleepingOrShuttingDown()) { 1000 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1001 } else { 1002 mStackSupervisor.checkReadyForSleepLocked(); 1003 ActivityRecord top = topStack.topRunningActivityLocked(null); 1004 if (top == null || (prev != null && top != prev)) { 1005 // If there are no more activities available to run, 1006 // do resume anyway to start something. Also if the top 1007 // activity on the stack is not the just paused activity, 1008 // we need to go ahead and resume it to ensure we complete 1009 // an in-flight app switch. 1010 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1011 } 1012 } 1013 1014 if (prev != null) { 1015 prev.resumeKeyDispatchingLocked(); 1016 1017 if (prev.app != null && prev.cpuTimeAtResume > 0 1018 && mService.mBatteryStatsService.isOnBattery()) { 1019 long diff; 1020 synchronized (mService.mProcessCpuThread) { 1021 diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1022 - prev.cpuTimeAtResume; 1023 } 1024 if (diff > 0) { 1025 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1026 synchronized (bsi) { 1027 BatteryStatsImpl.Uid.Proc ps = 1028 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1029 prev.info.packageName); 1030 if (ps != null) { 1031 ps.addForegroundTimeLocked(diff); 1032 } 1033 } 1034 } 1035 } 1036 prev.cpuTimeAtResume = 0; // reset it 1037 } 1038 } 1039 1040 /** 1041 * Once we know that we have asked an application to put an activity in 1042 * the resumed state (either by launching it or explicitly telling it), 1043 * this function updates the rest of our state to match that fact. 1044 */ 1045 private void completeResumeLocked(ActivityRecord next) { 1046 next.idle = false; 1047 next.results = null; 1048 next.newIntents = null; 1049 1050 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1051 ProcessRecord app = next.task.mActivities.get(0).app; 1052 if (app != null && app != mService.mHomeProcess) { 1053 mService.mHomeProcess = app; 1054 } 1055 } 1056 1057 if (next.nowVisible) { 1058 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1059 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1060 } 1061 1062 // schedule an idle timeout in case the app doesn't do it for us. 1063 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1064 1065 mStackSupervisor.reportResumedActivityLocked(next); 1066 1067 next.resumeKeyDispatchingLocked(); 1068 mNoAnimActivities.clear(); 1069 1070 // Mark the point when the activity is resuming 1071 // TODO: To be more accurate, the mark should be before the onCreate, 1072 // not after the onResume. But for subsequent starts, onResume is fine. 1073 if (next.app != null) { 1074 synchronized (mService.mProcessCpuThread) { 1075 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1076 } 1077 } else { 1078 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1079 } 1080 1081 // If we are resuming the activity that we had last screenshotted, then we know it will be 1082 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1083 if (next == mLastScreenshotActivity) { 1084 invalidateLastScreenshot(); 1085 } 1086 next.returningOptions = null; 1087 } 1088 1089 private void setVisibile(ActivityRecord r, boolean visible) { 1090 r.visible = visible; 1091 mWindowManager.setAppVisibility(r.appToken, visible); 1092 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1093 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1094 ActivityContainer container = containers.get(containerNdx); 1095 container.setVisible(visible); 1096 } 1097 } 1098 1099 // Find the first visible activity above the passed activity and if it is translucent return it 1100 // otherwise return null; 1101 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1102 TaskRecord task = r.task; 1103 if (task == null) { 1104 return null; 1105 } 1106 1107 ActivityStack stack = task.stack; 1108 if (stack == null) { 1109 return null; 1110 } 1111 1112 int stackNdx = mStacks.indexOf(stack); 1113 1114 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1115 int taskNdx = tasks.indexOf(task); 1116 1117 ArrayList<ActivityRecord> activities = task.mActivities; 1118 int activityNdx = activities.indexOf(r) + 1; 1119 1120 final int numStacks = mStacks.size(); 1121 while (stackNdx < numStacks) { 1122 tasks = mStacks.get(stackNdx).mTaskHistory; 1123 final int numTasks = tasks.size(); 1124 while (taskNdx < numTasks) { 1125 activities = tasks.get(taskNdx).mActivities; 1126 final int numActivities = activities.size(); 1127 while (activityNdx < numActivities) { 1128 final ActivityRecord activity = activities.get(activityNdx); 1129 if (!activity.finishing) { 1130 return activity.fullscreen ? null : activity; 1131 } 1132 ++activityNdx; 1133 } 1134 activityNdx = 0; 1135 ++taskNdx; 1136 } 1137 taskNdx = 0; 1138 ++stackNdx; 1139 } 1140 1141 return null; 1142 } 1143 1144 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1145 // If so, this stack is hidden, otherwise it is visible. 1146 private boolean isStackVisible() { 1147 if (!isAttached()) { 1148 return false; 1149 } 1150 1151 if (mStackSupervisor.isFrontStack(this)) { 1152 return true; 1153 } 1154 1155 /** 1156 * Start at the task above this one and go up, looking for a visible 1157 * fullscreen activity, or a translucent activity that requested the 1158 * wallpaper to be shown behind it. 1159 */ 1160 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1161 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1162 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1163 final TaskRecord task = tasks.get(taskNdx); 1164 final ArrayList<ActivityRecord> activities = task.mActivities; 1165 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1166 final ActivityRecord r = activities.get(activityNdx); 1167 1168 // Conditions for an activity to obscure the stack we're 1169 // examining: 1170 // 1. Not Finishing AND Visible AND: 1171 // 2. Either: 1172 // - Full Screen Activity OR 1173 // - On top of Home and our stack is NOT home 1174 if (!r.finishing && r.visible && (r.fullscreen || 1175 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1176 return false; 1177 } 1178 } 1179 } 1180 } 1181 1182 return true; 1183 } 1184 1185 /** 1186 * Make sure that all activities that need to be visible (that is, they 1187 * currently can be seen by the user) actually are. 1188 */ 1189 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1190 ActivityRecord top = topRunningActivityLocked(null); 1191 if (top == null) { 1192 return; 1193 } 1194 if (DEBUG_VISBILITY) Slog.v( 1195 TAG, "ensureActivitiesVisible behind " + top 1196 + " configChanges=0x" + Integer.toHexString(configChanges)); 1197 1198 if (mTranslucentActivityWaiting != top) { 1199 mUndrawnActivitiesBelowTopTranslucent.clear(); 1200 if (mTranslucentActivityWaiting != null) { 1201 // Call the callback with a timeout indication. 1202 notifyActivityDrawnLocked(null); 1203 mTranslucentActivityWaiting = null; 1204 } 1205 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1206 } 1207 1208 // If the top activity is not fullscreen, then we need to 1209 // make sure any activities under it are now visible. 1210 boolean aboveTop = true; 1211 boolean behindFullscreen = !isStackVisible(); 1212 1213 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1214 final TaskRecord task = mTaskHistory.get(taskNdx); 1215 final ArrayList<ActivityRecord> activities = task.mActivities; 1216 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1217 final ActivityRecord r = activities.get(activityNdx); 1218 if (r.finishing) { 1219 continue; 1220 } 1221 if (aboveTop && r != top) { 1222 continue; 1223 } 1224 aboveTop = false; 1225 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1226 // but must be drawn initially for the animation as though they were visible. 1227 if (!behindFullscreen || r.mLaunchTaskBehind) { 1228 if (DEBUG_VISBILITY) Slog.v( 1229 TAG, "Make visible? " + r + " finishing=" + r.finishing 1230 + " state=" + r.state); 1231 1232 // First: if this is not the current activity being started, make 1233 // sure it matches the current configuration. 1234 if (r != starting) { 1235 ensureActivityConfigurationLocked(r, 0); 1236 } 1237 1238 if (r.app == null || r.app.thread == null) { 1239 // This activity needs to be visible, but isn't even 1240 // running... get it started, but don't resume it 1241 // at this point. 1242 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1243 if (r != starting) { 1244 r.startFreezingScreenLocked(r.app, configChanges); 1245 } 1246 if (!r.visible || r.mLaunchTaskBehind) { 1247 if (DEBUG_VISBILITY) Slog.v( 1248 TAG, "Starting and making visible: " + r); 1249 setVisibile(r, true); 1250 } 1251 if (r != starting) { 1252 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1253 } 1254 1255 } else if (r.visible) { 1256 // If this activity is already visible, then there is nothing 1257 // else to do here. 1258 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1259 r.stopFreezingScreenLocked(false); 1260 try { 1261 if (r.returningOptions != null) { 1262 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1263 r.returningOptions); 1264 } 1265 } catch(RemoteException e) { 1266 } 1267 } else { 1268 // This activity is not currently visible, but is running. 1269 // Tell it to become visible. 1270 r.visible = true; 1271 if (r.state != ActivityState.RESUMED && r != starting) { 1272 // If this activity is paused, tell it 1273 // to now show its window. 1274 if (DEBUG_VISBILITY) Slog.v( 1275 TAG, "Making visible and scheduling visibility: " + r); 1276 try { 1277 if (mTranslucentActivityWaiting != null) { 1278 r.updateOptionsLocked(r.returningOptions); 1279 mUndrawnActivitiesBelowTopTranslucent.add(r); 1280 } 1281 setVisibile(r, true); 1282 r.sleeping = false; 1283 r.app.pendingUiClean = true; 1284 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1285 r.stopFreezingScreenLocked(false); 1286 } catch (Exception e) { 1287 // Just skip on any failure; we'll make it 1288 // visible when it next restarts. 1289 Slog.w(TAG, "Exception thrown making visibile: " 1290 + r.intent.getComponent(), e); 1291 } 1292 } 1293 } 1294 1295 // Aggregate current change flags. 1296 configChanges |= r.configChangeFlags; 1297 1298 if (r.fullscreen) { 1299 // At this point, nothing else needs to be shown 1300 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1301 behindFullscreen = true; 1302 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1303 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1304 behindFullscreen = true; 1305 } 1306 } else { 1307 if (DEBUG_VISBILITY) Slog.v( 1308 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1309 + " state=" + r.state 1310 + " behindFullscreen=" + behindFullscreen); 1311 // Now for any activities that aren't visible to the user, make 1312 // sure they no longer are keeping the screen frozen. 1313 if (r.visible) { 1314 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1315 try { 1316 setVisibile(r, false); 1317 switch (r.state) { 1318 case STOPPING: 1319 case STOPPED: 1320 if (r.app != null && r.app.thread != null) { 1321 if (DEBUG_VISBILITY) Slog.v( 1322 TAG, "Scheduling invisibility: " + r); 1323 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1324 } 1325 break; 1326 1327 case INITIALIZING: 1328 case RESUMED: 1329 case PAUSING: 1330 case PAUSED: 1331 // This case created for transitioning activities from 1332 // translucent to opaque {@link Activity#convertToOpaque}. 1333 if (getVisibleBehindActivity() == r) { 1334 releaseBackgroundResources(); 1335 } else { 1336 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1337 mStackSupervisor.mStoppingActivities.add(r); 1338 } 1339 mStackSupervisor.scheduleIdleLocked(); 1340 } 1341 break; 1342 1343 default: 1344 break; 1345 } 1346 } catch (Exception e) { 1347 // Just skip on any failure; we'll make it 1348 // visible when it next restarts. 1349 Slog.w(TAG, "Exception thrown making hidden: " 1350 + r.intent.getComponent(), e); 1351 } 1352 } else { 1353 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1354 } 1355 } 1356 } 1357 } 1358 1359 if (mTranslucentActivityWaiting != null && 1360 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1361 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1362 notifyActivityDrawnLocked(null); 1363 } 1364 } 1365 1366 void convertToTranslucent(ActivityRecord r) { 1367 mTranslucentActivityWaiting = r; 1368 mUndrawnActivitiesBelowTopTranslucent.clear(); 1369 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1370 } 1371 1372 /** 1373 * Called as activities below the top translucent activity are redrawn. When the last one is 1374 * redrawn notify the top activity by calling 1375 * {@link Activity#onTranslucentConversionComplete}. 1376 * 1377 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1378 * occurred and the activity will be notified immediately. 1379 */ 1380 void notifyActivityDrawnLocked(ActivityRecord r) { 1381 mActivityContainer.setDrawn(); 1382 if ((r == null) 1383 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1384 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1385 // The last undrawn activity below the top has just been drawn. If there is an 1386 // opaque activity at the top, notify it that it can become translucent safely now. 1387 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1388 mTranslucentActivityWaiting = null; 1389 mUndrawnActivitiesBelowTopTranslucent.clear(); 1390 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1391 1392 if (waitingActivity != null) { 1393 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1394 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1395 try { 1396 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1397 waitingActivity.appToken, r != null); 1398 } catch (RemoteException e) { 1399 } 1400 } 1401 } 1402 } 1403 } 1404 1405 /** If any activities below the top running one are in the INITIALIZING state and they have a 1406 * starting window displayed then remove that starting window. It is possible that the activity 1407 * in this state will never resumed in which case that starting window will be orphaned. */ 1408 void cancelInitializingActivities() { 1409 final ActivityRecord topActivity = topRunningActivityLocked(null); 1410 boolean aboveTop = true; 1411 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1412 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1413 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1414 final ActivityRecord r = activities.get(activityNdx); 1415 if (aboveTop) { 1416 if (r == topActivity) { 1417 aboveTop = false; 1418 } 1419 continue; 1420 } 1421 1422 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1423 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1424 r.mStartingWindowShown = false; 1425 mWindowManager.removeAppStartingWindow(r.appToken); 1426 } 1427 } 1428 } 1429 } 1430 1431 /** 1432 * Ensure that the top activity in the stack is resumed. 1433 * 1434 * @param prev The previously resumed activity, for when in the process 1435 * of pausing; can be null to call from elsewhere. 1436 * 1437 * @return Returns true if something is being resumed, or false if 1438 * nothing happened. 1439 */ 1440 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1441 return resumeTopActivityLocked(prev, null); 1442 } 1443 1444 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1445 if (inResumeTopActivity) { 1446 // Don't even start recursing. 1447 return false; 1448 } 1449 1450 boolean result = false; 1451 try { 1452 // Protect against recursion. 1453 inResumeTopActivity = true; 1454 result = resumeTopActivityInnerLocked(prev, options); 1455 } finally { 1456 inResumeTopActivity = false; 1457 } 1458 return result; 1459 } 1460 1461 final boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) { 1462 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1463 1464 ActivityRecord parent = mActivityContainer.mParentActivity; 1465 if ((parent != null && parent.state != ActivityState.RESUMED) || 1466 !mActivityContainer.isAttachedLocked()) { 1467 // Do not resume this stack if its parent is not resumed. 1468 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1469 return false; 1470 } 1471 1472 cancelInitializingActivities(); 1473 1474 // Find the first activity that is not finishing. 1475 ActivityRecord next = topRunningActivityLocked(null); 1476 1477 // Remember how we'll process this pause/resume situation, and ensure 1478 // that the state is reset however we wind up proceeding. 1479 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1480 mStackSupervisor.mUserLeaving = false; 1481 1482 final TaskRecord prevTask = prev != null ? prev.task : null; 1483 if (next == null) { 1484 // There are no more activities! Let's just start up the 1485 // Launcher... 1486 ActivityOptions.abort(options); 1487 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1488 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1489 // Only resume home if on home display 1490 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1491 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1492 return isOnHomeDisplay() && 1493 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1494 } 1495 1496 next.delayedResume = false; 1497 1498 // If the top activity is the resumed one, nothing to do. 1499 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1500 mStackSupervisor.allResumedActivitiesComplete()) { 1501 // Make sure we have executed any pending transitions, since there 1502 // should be nothing left to do at this point. 1503 mWindowManager.executeAppTransition(); 1504 mNoAnimActivities.clear(); 1505 ActivityOptions.abort(options); 1506 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1507 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1508 1509 // Make sure to notify Keyguard as well if it is waiting for an activity to be drawn. 1510 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1511 return false; 1512 } 1513 1514 final TaskRecord nextTask = next.task; 1515 if (prevTask != null && prevTask.stack == this && 1516 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1517 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1518 if (prevTask == nextTask) { 1519 prevTask.setFrontOfTask(); 1520 } else if (prevTask != topTask()) { 1521 // This task is going away but it was supposed to return to the home stack. 1522 // Now the task above it has to return to the home task instead. 1523 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1524 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1525 } else { 1526 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1527 "resumeTopActivityLocked: Launching home next"); 1528 // Only resume home if on home display 1529 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1530 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1531 return isOnHomeDisplay() && 1532 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1533 } 1534 } 1535 1536 // If we are sleeping, and there is no resumed activity, and the top 1537 // activity is paused, well that is the state we want. 1538 if (mService.isSleepingOrShuttingDown() 1539 && mLastPausedActivity == next 1540 && mStackSupervisor.allPausedActivitiesComplete()) { 1541 // Make sure we have executed any pending transitions, since there 1542 // should be nothing left to do at this point. 1543 mWindowManager.executeAppTransition(); 1544 mNoAnimActivities.clear(); 1545 ActivityOptions.abort(options); 1546 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1547 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1548 return false; 1549 } 1550 1551 // Make sure that the user who owns this activity is started. If not, 1552 // we will just leave it as is because someone should be bringing 1553 // another user's activities to the top of the stack. 1554 if (mService.mStartedUsers.get(next.userId) == null) { 1555 Slog.w(TAG, "Skipping resume of top activity " + next 1556 + ": user " + next.userId + " is stopped"); 1557 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1558 return false; 1559 } 1560 1561 // The activity may be waiting for stop, but that is no longer 1562 // appropriate for it. 1563 mStackSupervisor.mStoppingActivities.remove(next); 1564 mStackSupervisor.mGoingToSleepActivities.remove(next); 1565 next.sleeping = false; 1566 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1567 1568 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1569 1570 // If we are currently pausing an activity, then don't do anything 1571 // until that is done. 1572 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1573 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1574 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1575 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1576 return false; 1577 } 1578 1579 // Okay we are now going to start a switch, to 'next'. We may first 1580 // have to pause the current activity, but this is an important point 1581 // where we have decided to go to 'next' so keep track of that. 1582 // XXX "App Redirected" dialog is getting too many false positives 1583 // at this point, so turn off for now. 1584 if (false) { 1585 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1586 long now = SystemClock.uptimeMillis(); 1587 final boolean inTime = mLastStartedActivity.startTime != 0 1588 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1589 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1590 final int nextUid = next.info.applicationInfo.uid; 1591 if (inTime && lastUid != nextUid 1592 && lastUid != next.launchedFromUid 1593 && mService.checkPermission( 1594 android.Manifest.permission.STOP_APP_SWITCHES, 1595 -1, next.launchedFromUid) 1596 != PackageManager.PERMISSION_GRANTED) { 1597 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1598 } else { 1599 next.startTime = now; 1600 mLastStartedActivity = next; 1601 } 1602 } else { 1603 next.startTime = SystemClock.uptimeMillis(); 1604 mLastStartedActivity = next; 1605 } 1606 } 1607 1608 // We need to start pausing the current activity so the top one 1609 // can be resumed... 1610 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving); 1611 if (mResumedActivity != null) { 1612 pausing = true; 1613 startPausingLocked(userLeaving, false); 1614 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1615 } 1616 if (pausing) { 1617 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1618 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1619 // At this point we want to put the upcoming activity's process 1620 // at the top of the LRU list, since we know we will be needing it 1621 // very soon and it would be a waste to let it get killed if it 1622 // happens to be sitting towards the end. 1623 if (next.app != null && next.app.thread != null) { 1624 mService.updateLruProcessLocked(next.app, true, null); 1625 } 1626 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1627 return true; 1628 } 1629 1630 // If the most recent activity was noHistory but was only stopped rather 1631 // than stopped+finished because the device went to sleep, we need to make 1632 // sure to finish it as we're making a new activity topmost. 1633 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1634 !mLastNoHistoryActivity.finishing) { 1635 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1636 " on new resume"); 1637 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1638 null, "no-history", false); 1639 mLastNoHistoryActivity = null; 1640 } 1641 1642 if (prev != null && prev != next) { 1643 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1644 prev.waitingVisible = true; 1645 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1646 if (DEBUG_SWITCH) Slog.v( 1647 TAG, "Resuming top, waiting visible to hide: " + prev); 1648 } else { 1649 // The next activity is already visible, so hide the previous 1650 // activity's windows right now so we can show the new one ASAP. 1651 // We only do this if the previous is finishing, which should mean 1652 // it is on top of the one being resumed so hiding it quickly 1653 // is good. Otherwise, we want to do the normal route of allowing 1654 // the resumed activity to be shown so we can decide if the 1655 // previous should actually be hidden depending on whether the 1656 // new one is found to be full-screen or not. 1657 if (prev.finishing) { 1658 mWindowManager.setAppVisibility(prev.appToken, false); 1659 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1660 + prev + ", waitingVisible=" 1661 + (prev != null ? prev.waitingVisible : null) 1662 + ", nowVisible=" + next.nowVisible); 1663 } else { 1664 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1665 + prev + ", waitingVisible=" 1666 + (prev != null ? prev.waitingVisible : null) 1667 + ", nowVisible=" + next.nowVisible); 1668 } 1669 } 1670 } 1671 1672 // Launching this app's activity, make sure the app is no longer 1673 // considered stopped. 1674 try { 1675 AppGlobals.getPackageManager().setPackageStoppedState( 1676 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1677 } catch (RemoteException e1) { 1678 } catch (IllegalArgumentException e) { 1679 Slog.w(TAG, "Failed trying to unstop package " 1680 + next.packageName + ": " + e); 1681 } 1682 1683 // We are starting up the next activity, so tell the window manager 1684 // that the previous one will be hidden soon. This way it can know 1685 // to ignore it when computing the desired screen orientation. 1686 boolean anim = true; 1687 if (prev != null) { 1688 if (prev.finishing) { 1689 if (DEBUG_TRANSITION) Slog.v(TAG, 1690 "Prepare close transition: prev=" + prev); 1691 if (mNoAnimActivities.contains(prev)) { 1692 anim = false; 1693 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1694 } else { 1695 mWindowManager.prepareAppTransition(prev.task == next.task 1696 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1697 : AppTransition.TRANSIT_TASK_CLOSE, false); 1698 } 1699 mWindowManager.setAppWillBeHidden(prev.appToken); 1700 mWindowManager.setAppVisibility(prev.appToken, false); 1701 } else { 1702 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1703 if (mNoAnimActivities.contains(next)) { 1704 anim = false; 1705 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1706 } else { 1707 mWindowManager.prepareAppTransition(prev.task == next.task 1708 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1709 : next.mLaunchTaskBehind 1710 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1711 : AppTransition.TRANSIT_TASK_OPEN, false); 1712 } 1713 } 1714 if (false) { 1715 mWindowManager.setAppWillBeHidden(prev.appToken); 1716 mWindowManager.setAppVisibility(prev.appToken, false); 1717 } 1718 } else { 1719 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1720 if (mNoAnimActivities.contains(next)) { 1721 anim = false; 1722 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1723 } else { 1724 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1725 } 1726 } 1727 1728 Bundle resumeAnimOptions = null; 1729 if (anim) { 1730 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1731 if (opts != null) { 1732 resumeAnimOptions = opts.toBundle(); 1733 } 1734 next.applyOptionsLocked(); 1735 } else { 1736 next.clearOptionsLocked(); 1737 } 1738 1739 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1740 if (next.app != null && next.app.thread != null) { 1741 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1742 1743 // This activity is now becoming visible. 1744 mWindowManager.setAppVisibility(next.appToken, true); 1745 1746 // schedule launch ticks to collect information about slow apps. 1747 next.startLaunchTickingLocked(); 1748 1749 ActivityRecord lastResumedActivity = 1750 lastStack == null ? null :lastStack.mResumedActivity; 1751 ActivityState lastState = next.state; 1752 1753 mService.updateCpuStats(); 1754 1755 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1756 next.state = ActivityState.RESUMED; 1757 mResumedActivity = next; 1758 next.task.touchActiveTime(); 1759 mService.addRecentTaskLocked(next.task); 1760 mService.updateLruProcessLocked(next.app, true, null); 1761 updateLRUListLocked(next); 1762 mService.updateOomAdjLocked(); 1763 1764 // Have the window manager re-evaluate the orientation of 1765 // the screen based on the new activity order. 1766 boolean notUpdated = true; 1767 if (mStackSupervisor.isFrontStack(this)) { 1768 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1769 mService.mConfiguration, 1770 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1771 if (config != null) { 1772 next.frozenBeforeDestroy = true; 1773 } 1774 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1775 } 1776 1777 if (notUpdated) { 1778 // The configuration update wasn't able to keep the existing 1779 // instance of the activity, and instead started a new one. 1780 // We should be all done, but let's just make sure our activity 1781 // is still at the top and schedule another run if something 1782 // weird happened. 1783 ActivityRecord nextNext = topRunningActivityLocked(null); 1784 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1785 "Activity config changed during resume: " + next 1786 + ", new next: " + nextNext); 1787 if (nextNext != next) { 1788 // Do over! 1789 mStackSupervisor.scheduleResumeTopActivities(); 1790 } 1791 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1792 mNoAnimActivities.clear(); 1793 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1794 return true; 1795 } 1796 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1797 return false; 1798 } 1799 1800 try { 1801 // Deliver all pending results. 1802 ArrayList<ResultInfo> a = next.results; 1803 if (a != null) { 1804 final int N = a.size(); 1805 if (!next.finishing && N > 0) { 1806 if (DEBUG_RESULTS) Slog.v( 1807 TAG, "Delivering results to " + next 1808 + ": " + a); 1809 next.app.thread.scheduleSendResult(next.appToken, a); 1810 } 1811 } 1812 1813 if (next.newIntents != null) { 1814 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1815 } 1816 1817 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1818 next.userId, System.identityHashCode(next), 1819 next.task.taskId, next.shortComponentName); 1820 1821 next.sleeping = false; 1822 mService.showAskCompatModeDialogLocked(next); 1823 next.app.pendingUiClean = true; 1824 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1825 next.clearOptionsLocked(); 1826 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1827 mService.isNextTransitionForward(), resumeAnimOptions); 1828 1829 mStackSupervisor.checkReadyForSleepLocked(); 1830 1831 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1832 } catch (Exception e) { 1833 // Whoops, need to restart this activity! 1834 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1835 + lastState + ": " + next); 1836 next.state = lastState; 1837 if (lastStack != null) { 1838 lastStack.mResumedActivity = lastResumedActivity; 1839 } 1840 Slog.i(TAG, "Restarting because process died: " + next); 1841 if (!next.hasBeenLaunched) { 1842 next.hasBeenLaunched = true; 1843 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1844 mStackSupervisor.isFrontStack(lastStack)) { 1845 mWindowManager.setAppStartingWindow( 1846 next.appToken, next.packageName, next.theme, 1847 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1848 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1849 next.windowFlags, null, true); 1850 } 1851 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1852 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1853 return true; 1854 } 1855 1856 // From this point on, if something goes wrong there is no way 1857 // to recover the activity. 1858 try { 1859 next.visible = true; 1860 completeResumeLocked(next); 1861 } catch (Exception e) { 1862 // If any exception gets thrown, toss away this 1863 // activity and try the next one. 1864 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1865 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1866 "resume-exception", true); 1867 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1868 return true; 1869 } 1870 next.stopped = false; 1871 1872 } else { 1873 // Whoops, need to restart this activity! 1874 if (!next.hasBeenLaunched) { 1875 next.hasBeenLaunched = true; 1876 } else { 1877 if (SHOW_APP_STARTING_PREVIEW) { 1878 mWindowManager.setAppStartingWindow( 1879 next.appToken, next.packageName, next.theme, 1880 mService.compatibilityInfoForPackageLocked( 1881 next.info.applicationInfo), 1882 next.nonLocalizedLabel, 1883 next.labelRes, next.icon, next.logo, next.windowFlags, 1884 null, true); 1885 } 1886 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1887 } 1888 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1889 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1890 } 1891 1892 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1893 return true; 1894 } 1895 1896 private void insertTaskAtTop(TaskRecord task) { 1897 // If this is being moved to the top by another activity or being launched from the home 1898 // activity, set mOnTopOfHome accordingly. 1899 if (isOnHomeDisplay()) { 1900 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1901 final boolean fromHome = lastStack.isHomeStack(); 1902 if (!isHomeStack() && (fromHome || topTask() != task)) { 1903 task.setTaskToReturnTo(fromHome 1904 ? lastStack.topTask() == null 1905 ? HOME_ACTIVITY_TYPE 1906 : lastStack.topTask().taskType 1907 : APPLICATION_ACTIVITY_TYPE); 1908 } 1909 } else { 1910 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1911 } 1912 1913 mTaskHistory.remove(task); 1914 // Now put task at top. 1915 int taskNdx = mTaskHistory.size(); 1916 if (!isCurrentProfileLocked(task.userId)) { 1917 // Put non-current user tasks below current user tasks. 1918 while (--taskNdx >= 0) { 1919 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1920 break; 1921 } 1922 } 1923 ++taskNdx; 1924 } 1925 mTaskHistory.add(taskNdx, task); 1926 updateTaskMovement(task, true); 1927 } 1928 1929 final void startActivityLocked(ActivityRecord r, boolean newTask, 1930 boolean doResume, boolean keepCurTransition, Bundle options) { 1931 TaskRecord rTask = r.task; 1932 final int taskId = rTask.taskId; 1933 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1934 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1935 // Last activity in task had been removed or ActivityManagerService is reusing task. 1936 // Insert or replace. 1937 // Might not even be in. 1938 insertTaskAtTop(rTask); 1939 mWindowManager.moveTaskToTop(taskId); 1940 } 1941 TaskRecord task = null; 1942 if (!newTask) { 1943 // If starting in an existing task, find where that is... 1944 boolean startIt = true; 1945 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1946 task = mTaskHistory.get(taskNdx); 1947 if (task.getTopActivity() == null) { 1948 // All activities in task are finishing. 1949 continue; 1950 } 1951 if (task == r.task) { 1952 // Here it is! Now, if this is not yet visible to the 1953 // user, then just add it without starting; it will 1954 // get started when the user navigates back to it. 1955 if (!startIt) { 1956 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1957 + task, new RuntimeException("here").fillInStackTrace()); 1958 task.addActivityToTop(r); 1959 r.putInHistory(); 1960 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1961 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1962 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1963 r.userId, r.info.configChanges, task.voiceSession != null, 1964 r.mLaunchTaskBehind); 1965 if (VALIDATE_TOKENS) { 1966 validateAppTokensLocked(); 1967 } 1968 ActivityOptions.abort(options); 1969 return; 1970 } 1971 break; 1972 } else if (task.numFullscreen > 0) { 1973 startIt = false; 1974 } 1975 } 1976 } 1977 1978 // Place a new activity at top of stack, so it is next to interact 1979 // with the user. 1980 1981 // If we are not placing the new activity frontmost, we do not want 1982 // to deliver the onUserLeaving callback to the actual frontmost 1983 // activity 1984 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1985 mStackSupervisor.mUserLeaving = false; 1986 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1987 "startActivity() behind front, mUserLeaving=false"); 1988 } 1989 1990 task = r.task; 1991 1992 // Slot the activity into the history stack and proceed 1993 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1994 new RuntimeException("here").fillInStackTrace()); 1995 task.addActivityToTop(r); 1996 task.setFrontOfTask(); 1997 1998 r.putInHistory(); 1999 if (!isHomeStack() || numActivities() > 0) { 2000 // We want to show the starting preview window if we are 2001 // switching to a new task, or the next activity's process is 2002 // not currently running. 2003 boolean showStartingIcon = newTask; 2004 ProcessRecord proc = r.app; 2005 if (proc == null) { 2006 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2007 } 2008 if (proc == null || proc.thread == null) { 2009 showStartingIcon = true; 2010 } 2011 if (DEBUG_TRANSITION) Slog.v(TAG, 2012 "Prepare open transition: starting " + r); 2013 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2014 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2015 mNoAnimActivities.add(r); 2016 } else { 2017 mWindowManager.prepareAppTransition(newTask 2018 ? r.mLaunchTaskBehind 2019 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2020 : AppTransition.TRANSIT_TASK_OPEN 2021 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2022 mNoAnimActivities.remove(r); 2023 } 2024 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2025 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2026 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2027 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2028 boolean doShow = true; 2029 if (newTask) { 2030 // Even though this activity is starting fresh, we still need 2031 // to reset it to make sure we apply affinities to move any 2032 // existing activities from other tasks in to it. 2033 // If the caller has requested that the target task be 2034 // reset, then do so. 2035 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2036 resetTaskIfNeededLocked(r, r); 2037 doShow = topRunningNonDelayedActivityLocked(null) == r; 2038 } 2039 } else if (options != null && new ActivityOptions(options).getAnimationType() 2040 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2041 doShow = false; 2042 } 2043 if (r.mLaunchTaskBehind) { 2044 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2045 // tell WindowManager that r is visible even though it is at the back of the stack. 2046 mWindowManager.setAppVisibility(r.appToken, true); 2047 ensureActivitiesVisibleLocked(null, 0); 2048 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2049 // Figure out if we are transitioning from another activity that is 2050 // "has the same starting icon" as the next one. This allows the 2051 // window manager to keep the previous window it had previously 2052 // created, if it still had one. 2053 ActivityRecord prev = mResumedActivity; 2054 if (prev != null) { 2055 // We don't want to reuse the previous starting preview if: 2056 // (1) The current activity is in a different task. 2057 if (prev.task != r.task) { 2058 prev = null; 2059 } 2060 // (2) The current activity is already displayed. 2061 else if (prev.nowVisible) { 2062 prev = null; 2063 } 2064 } 2065 mWindowManager.setAppStartingWindow( 2066 r.appToken, r.packageName, r.theme, 2067 mService.compatibilityInfoForPackageLocked( 2068 r.info.applicationInfo), r.nonLocalizedLabel, 2069 r.labelRes, r.icon, r.logo, r.windowFlags, 2070 prev != null ? prev.appToken : null, showStartingIcon); 2071 r.mStartingWindowShown = true; 2072 } 2073 } else { 2074 // If this is the first activity, don't do any fancy animations, 2075 // because there is nothing for it to animate on top of. 2076 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2077 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2078 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2079 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2080 ActivityOptions.abort(options); 2081 options = null; 2082 } 2083 if (VALIDATE_TOKENS) { 2084 validateAppTokensLocked(); 2085 } 2086 2087 if (doResume) { 2088 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2089 } 2090 } 2091 2092 final void validateAppTokensLocked() { 2093 mValidateAppTokens.clear(); 2094 mValidateAppTokens.ensureCapacity(numActivities()); 2095 final int numTasks = mTaskHistory.size(); 2096 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2097 TaskRecord task = mTaskHistory.get(taskNdx); 2098 final ArrayList<ActivityRecord> activities = task.mActivities; 2099 if (activities.isEmpty()) { 2100 continue; 2101 } 2102 TaskGroup group = new TaskGroup(); 2103 group.taskId = task.taskId; 2104 mValidateAppTokens.add(group); 2105 final int numActivities = activities.size(); 2106 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2107 final ActivityRecord r = activities.get(activityNdx); 2108 group.tokens.add(r.appToken); 2109 } 2110 } 2111 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2112 } 2113 2114 /** 2115 * Perform a reset of the given task, if needed as part of launching it. 2116 * Returns the new HistoryRecord at the top of the task. 2117 */ 2118 /** 2119 * Helper method for #resetTaskIfNeededLocked. 2120 * We are inside of the task being reset... we'll either finish this activity, push it out 2121 * for another task, or leave it as-is. 2122 * @param task The task containing the Activity (taskTop) that might be reset. 2123 * @param forceReset 2124 * @return An ActivityOptions that needs to be processed. 2125 */ 2126 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2127 ActivityOptions topOptions = null; 2128 2129 int replyChainEnd = -1; 2130 boolean canMoveOptions = true; 2131 2132 // We only do this for activities that are not the root of the task (since if we finish 2133 // the root, we may no longer have the task!). 2134 final ArrayList<ActivityRecord> activities = task.mActivities; 2135 final int numActivities = activities.size(); 2136 final int rootActivityNdx = task.findEffectiveRootIndex(); 2137 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2138 ActivityRecord target = activities.get(i); 2139 if (target.frontOfTask) 2140 break; 2141 2142 final int flags = target.info.flags; 2143 final boolean finishOnTaskLaunch = 2144 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2145 final boolean allowTaskReparenting = 2146 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2147 final boolean clearWhenTaskReset = 2148 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2149 2150 if (!finishOnTaskLaunch 2151 && !clearWhenTaskReset 2152 && target.resultTo != null) { 2153 // If this activity is sending a reply to a previous 2154 // activity, we can't do anything with it now until 2155 // we reach the start of the reply chain. 2156 // XXX note that we are assuming the result is always 2157 // to the previous activity, which is almost always 2158 // the case but we really shouldn't count on. 2159 if (replyChainEnd < 0) { 2160 replyChainEnd = i; 2161 } 2162 } else if (!finishOnTaskLaunch 2163 && !clearWhenTaskReset 2164 && allowTaskReparenting 2165 && target.taskAffinity != null 2166 && !target.taskAffinity.equals(task.affinity)) { 2167 // If this activity has an affinity for another 2168 // task, then we need to move it out of here. We will 2169 // move it as far out of the way as possible, to the 2170 // bottom of the activity stack. This also keeps it 2171 // correctly ordered with any activities we previously 2172 // moved. 2173 final TaskRecord targetTask; 2174 final ActivityRecord bottom = 2175 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2176 mTaskHistory.get(0).mActivities.get(0) : null; 2177 if (bottom != null && target.taskAffinity != null 2178 && target.taskAffinity.equals(bottom.task.affinity)) { 2179 // If the activity currently at the bottom has the 2180 // same task affinity as the one we are moving, 2181 // then merge it into the same task. 2182 targetTask = bottom.task; 2183 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2184 + " out to bottom task " + bottom.task); 2185 } else { 2186 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2187 null, null, null, false); 2188 targetTask.affinityIntent = target.intent; 2189 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2190 + " out to new task " + target.task); 2191 } 2192 2193 final int targetTaskId = targetTask.taskId; 2194 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2195 2196 boolean noOptions = canMoveOptions; 2197 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2198 for (int srcPos = start; srcPos >= i; --srcPos) { 2199 final ActivityRecord p = activities.get(srcPos); 2200 if (p.finishing) { 2201 continue; 2202 } 2203 2204 canMoveOptions = false; 2205 if (noOptions && topOptions == null) { 2206 topOptions = p.takeOptionsLocked(); 2207 if (topOptions != null) { 2208 noOptions = false; 2209 } 2210 } 2211 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2212 + task + " adding to task=" + targetTask 2213 + " Callers=" + Debug.getCallers(4)); 2214 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2215 + " out to target's task " + target.task); 2216 p.setTask(targetTask, null); 2217 targetTask.addActivityAtBottom(p); 2218 2219 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2220 } 2221 2222 mWindowManager.moveTaskToBottom(targetTaskId); 2223 if (VALIDATE_TOKENS) { 2224 validateAppTokensLocked(); 2225 } 2226 2227 replyChainEnd = -1; 2228 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2229 // If the activity should just be removed -- either 2230 // because it asks for it, or the task should be 2231 // cleared -- then finish it and anything that is 2232 // part of its reply chain. 2233 int end; 2234 if (clearWhenTaskReset) { 2235 // In this case, we want to finish this activity 2236 // and everything above it, so be sneaky and pretend 2237 // like these are all in the reply chain. 2238 end = numActivities - 1; 2239 } else if (replyChainEnd < 0) { 2240 end = i; 2241 } else { 2242 end = replyChainEnd; 2243 } 2244 boolean noOptions = canMoveOptions; 2245 for (int srcPos = i; srcPos <= end; srcPos++) { 2246 ActivityRecord p = activities.get(srcPos); 2247 if (p.finishing) { 2248 continue; 2249 } 2250 canMoveOptions = false; 2251 if (noOptions && topOptions == null) { 2252 topOptions = p.takeOptionsLocked(); 2253 if (topOptions != null) { 2254 noOptions = false; 2255 } 2256 } 2257 if (DEBUG_TASKS) Slog.w(TAG, 2258 "resetTaskIntendedTask: calling finishActivity on " + p); 2259 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2260 end--; 2261 srcPos--; 2262 } 2263 } 2264 replyChainEnd = -1; 2265 } else { 2266 // If we were in the middle of a chain, well the 2267 // activity that started it all doesn't want anything 2268 // special, so leave it all as-is. 2269 replyChainEnd = -1; 2270 } 2271 } 2272 2273 return topOptions; 2274 } 2275 2276 /** 2277 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2278 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2279 * @param affinityTask The task we are looking for an affinity to. 2280 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2281 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2282 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2283 */ 2284 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2285 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2286 int replyChainEnd = -1; 2287 final int taskId = task.taskId; 2288 final String taskAffinity = task.affinity; 2289 2290 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2291 final int numActivities = activities.size(); 2292 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2293 2294 // Do not operate on or below the effective root Activity. 2295 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2296 ActivityRecord target = activities.get(i); 2297 if (target.frontOfTask) 2298 break; 2299 2300 final int flags = target.info.flags; 2301 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2302 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2303 2304 if (target.resultTo != null) { 2305 // If this activity is sending a reply to a previous 2306 // activity, we can't do anything with it now until 2307 // we reach the start of the reply chain. 2308 // XXX note that we are assuming the result is always 2309 // to the previous activity, which is almost always 2310 // the case but we really shouldn't count on. 2311 if (replyChainEnd < 0) { 2312 replyChainEnd = i; 2313 } 2314 } else if (topTaskIsHigher 2315 && allowTaskReparenting 2316 && taskAffinity != null 2317 && taskAffinity.equals(target.taskAffinity)) { 2318 // This activity has an affinity for our task. Either remove it if we are 2319 // clearing or move it over to our task. Note that 2320 // we currently punt on the case where we are resetting a 2321 // task that is not at the top but who has activities above 2322 // with an affinity to it... this is really not a normal 2323 // case, and we will need to later pull that task to the front 2324 // and usually at that point we will do the reset and pick 2325 // up those remaining activities. (This only happens if 2326 // someone starts an activity in a new task from an activity 2327 // in a task that is not currently on top.) 2328 if (forceReset || finishOnTaskLaunch) { 2329 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2330 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2331 for (int srcPos = start; srcPos >= i; --srcPos) { 2332 final ActivityRecord p = activities.get(srcPos); 2333 if (p.finishing) { 2334 continue; 2335 } 2336 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2337 } 2338 } else { 2339 if (taskInsertionPoint < 0) { 2340 taskInsertionPoint = task.mActivities.size(); 2341 2342 } 2343 2344 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2345 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2346 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2347 for (int srcPos = start; srcPos >= i; --srcPos) { 2348 final ActivityRecord p = activities.get(srcPos); 2349 p.setTask(task, null); 2350 task.addActivityAtIndex(taskInsertionPoint, p); 2351 2352 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2353 + " to stack at " + task, 2354 new RuntimeException("here").fillInStackTrace()); 2355 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2356 + " in to resetting task " + task); 2357 mWindowManager.setAppGroupId(p.appToken, taskId); 2358 } 2359 mWindowManager.moveTaskToTop(taskId); 2360 if (VALIDATE_TOKENS) { 2361 validateAppTokensLocked(); 2362 } 2363 2364 // Now we've moved it in to place... but what if this is 2365 // a singleTop activity and we have put it on top of another 2366 // instance of the same activity? Then we drop the instance 2367 // below so it remains singleTop. 2368 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2369 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2370 int targetNdx = taskActivities.indexOf(target); 2371 if (targetNdx > 0) { 2372 ActivityRecord p = taskActivities.get(targetNdx - 1); 2373 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2374 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2375 false); 2376 } 2377 } 2378 } 2379 } 2380 2381 replyChainEnd = -1; 2382 } 2383 } 2384 return taskInsertionPoint; 2385 } 2386 2387 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2388 ActivityRecord newActivity) { 2389 boolean forceReset = 2390 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2391 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2392 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2393 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2394 forceReset = true; 2395 } 2396 } 2397 2398 final TaskRecord task = taskTop.task; 2399 2400 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2401 * for remaining tasks. Used for later tasks to reparent to task. */ 2402 boolean taskFound = false; 2403 2404 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2405 ActivityOptions topOptions = null; 2406 2407 // Preserve the location for reparenting in the new task. 2408 int reparentInsertionPoint = -1; 2409 2410 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2411 final TaskRecord targetTask = mTaskHistory.get(i); 2412 2413 if (targetTask == task) { 2414 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2415 taskFound = true; 2416 } else { 2417 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2418 taskFound, forceReset, reparentInsertionPoint); 2419 } 2420 } 2421 2422 int taskNdx = mTaskHistory.indexOf(task); 2423 do { 2424 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2425 } while (taskTop == null && taskNdx >= 0); 2426 2427 if (topOptions != null) { 2428 // If we got some ActivityOptions from an activity on top that 2429 // was removed from the task, propagate them to the new real top. 2430 if (taskTop != null) { 2431 taskTop.updateOptionsLocked(topOptions); 2432 } else { 2433 topOptions.abort(); 2434 } 2435 } 2436 2437 return taskTop; 2438 } 2439 2440 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2441 String resultWho, int requestCode, int resultCode, Intent data) { 2442 2443 if (callingUid > 0) { 2444 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2445 data, r.getUriPermissionsLocked(), r.userId); 2446 } 2447 2448 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2449 + " : who=" + resultWho + " req=" + requestCode 2450 + " res=" + resultCode + " data=" + data); 2451 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2452 try { 2453 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2454 list.add(new ResultInfo(resultWho, requestCode, 2455 resultCode, data)); 2456 r.app.thread.scheduleSendResult(r.appToken, list); 2457 return; 2458 } catch (Exception e) { 2459 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2460 } 2461 } 2462 2463 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2464 } 2465 2466 private void adjustFocusedActivityLocked(ActivityRecord r) { 2467 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2468 ActivityRecord next = topRunningActivityLocked(null); 2469 if (next != r) { 2470 final TaskRecord task = r.task; 2471 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2472 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2473 } 2474 } 2475 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2476 if (top != null) { 2477 mService.setFocusedActivityLocked(top); 2478 } 2479 } 2480 } 2481 2482 final void stopActivityLocked(ActivityRecord r) { 2483 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2484 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2485 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2486 if (!r.finishing) { 2487 if (!mService.isSleeping()) { 2488 if (DEBUG_STATES) { 2489 Slog.d(TAG, "no-history finish of " + r); 2490 } 2491 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2492 "no-history", false); 2493 } else { 2494 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2495 + " on stop because we're just sleeping"); 2496 } 2497 } 2498 } 2499 2500 if (r.app != null && r.app.thread != null) { 2501 adjustFocusedActivityLocked(r); 2502 r.resumeKeyDispatchingLocked(); 2503 try { 2504 r.stopped = false; 2505 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2506 + " (stop requested)"); 2507 r.state = ActivityState.STOPPING; 2508 if (DEBUG_VISBILITY) Slog.v( 2509 TAG, "Stopping visible=" + r.visible + " for " + r); 2510 if (!r.visible) { 2511 mWindowManager.setAppVisibility(r.appToken, false); 2512 } 2513 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2514 if (mService.isSleepingOrShuttingDown()) { 2515 r.setSleeping(true); 2516 } 2517 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2518 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2519 } catch (Exception e) { 2520 // Maybe just ignore exceptions here... if the process 2521 // has crashed, our death notification will clean things 2522 // up. 2523 Slog.w(TAG, "Exception thrown during pause", e); 2524 // Just in case, assume it to be stopped. 2525 r.stopped = true; 2526 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2527 r.state = ActivityState.STOPPED; 2528 if (r.configDestroy) { 2529 destroyActivityLocked(r, true, "stop-except"); 2530 } 2531 } 2532 } 2533 } 2534 2535 /** 2536 * @return Returns true if the activity is being finished, false if for 2537 * some reason it is being left as-is. 2538 */ 2539 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2540 Intent resultData, String reason, boolean oomAdj) { 2541 ActivityRecord r = isInStackLocked(token); 2542 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2543 TAG, "Finishing activity token=" + token + " r=" 2544 + ", result=" + resultCode + ", data=" + resultData 2545 + ", reason=" + reason); 2546 if (r == null) { 2547 return false; 2548 } 2549 2550 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2551 return true; 2552 } 2553 2554 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2555 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2556 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2557 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2558 ActivityRecord r = activities.get(activityNdx); 2559 if (r.resultTo == self && r.requestCode == requestCode) { 2560 if ((r.resultWho == null && resultWho == null) || 2561 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2562 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2563 false); 2564 } 2565 } 2566 } 2567 } 2568 mService.updateOomAdjLocked(); 2569 } 2570 2571 final void finishTopRunningActivityLocked(ProcessRecord app) { 2572 ActivityRecord r = topRunningActivityLocked(null); 2573 if (r != null && r.app == app) { 2574 // If the top running activity is from this crashing 2575 // process, then terminate it to avoid getting in a loop. 2576 Slog.w(TAG, " Force finishing activity " 2577 + r.intent.getComponent().flattenToShortString()); 2578 int taskNdx = mTaskHistory.indexOf(r.task); 2579 int activityNdx = r.task.mActivities.indexOf(r); 2580 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2581 // Also terminate any activities below it that aren't yet 2582 // stopped, to avoid a situation where one will get 2583 // re-start our crashing activity once it gets resumed again. 2584 --activityNdx; 2585 if (activityNdx < 0) { 2586 do { 2587 --taskNdx; 2588 if (taskNdx < 0) { 2589 break; 2590 } 2591 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2592 } while (activityNdx < 0); 2593 } 2594 if (activityNdx >= 0) { 2595 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2596 if (r.state == ActivityState.RESUMED 2597 || r.state == ActivityState.PAUSING 2598 || r.state == ActivityState.PAUSED) { 2599 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2600 Slog.w(TAG, " Force finishing activity " 2601 + r.intent.getComponent().flattenToShortString()); 2602 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2603 } 2604 } 2605 } 2606 } 2607 } 2608 2609 final void finishVoiceTask(IVoiceInteractionSession session) { 2610 IBinder sessionBinder = session.asBinder(); 2611 boolean didOne = false; 2612 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2613 TaskRecord tr = mTaskHistory.get(taskNdx); 2614 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2615 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2616 ActivityRecord r = tr.mActivities.get(activityNdx); 2617 if (!r.finishing) { 2618 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2619 false); 2620 didOne = true; 2621 } 2622 } 2623 } 2624 } 2625 if (didOne) { 2626 mService.updateOomAdjLocked(); 2627 } 2628 } 2629 2630 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2631 ArrayList<ActivityRecord> activities = r.task.mActivities; 2632 for (int index = activities.indexOf(r); index >= 0; --index) { 2633 ActivityRecord cur = activities.get(index); 2634 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2635 break; 2636 } 2637 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2638 } 2639 return true; 2640 } 2641 2642 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2643 // send the result 2644 ActivityRecord resultTo = r.resultTo; 2645 if (resultTo != null) { 2646 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2647 + " who=" + r.resultWho + " req=" + r.requestCode 2648 + " res=" + resultCode + " data=" + resultData); 2649 if (resultTo.userId != r.userId) { 2650 if (resultData != null) { 2651 resultData.setContentUserHint(r.userId); 2652 } 2653 } 2654 if (r.info.applicationInfo.uid > 0) { 2655 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2656 resultTo.packageName, resultData, 2657 resultTo.getUriPermissionsLocked(), resultTo.userId); 2658 } 2659 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2660 resultData); 2661 r.resultTo = null; 2662 } 2663 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2664 2665 // Make sure this HistoryRecord is not holding on to other resources, 2666 // because clients have remote IPC references to this object so we 2667 // can't assume that will go away and want to avoid circular IPC refs. 2668 r.results = null; 2669 r.pendingResults = null; 2670 r.newIntents = null; 2671 r.icicle = null; 2672 } 2673 2674 /** 2675 * @return Returns true if this activity has been removed from the history 2676 * list, or false if it is still in the list and will be removed later. 2677 */ 2678 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2679 String reason, boolean oomAdj) { 2680 if (r.finishing) { 2681 Slog.w(TAG, "Duplicate finish request for " + r); 2682 return false; 2683 } 2684 2685 r.makeFinishing(); 2686 final TaskRecord task = r.task; 2687 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2688 r.userId, System.identityHashCode(r), 2689 task.taskId, r.shortComponentName, reason); 2690 final ArrayList<ActivityRecord> activities = task.mActivities; 2691 final int index = activities.indexOf(r); 2692 if (index < (activities.size() - 1)) { 2693 task.setFrontOfTask(); 2694 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2695 // If the caller asked that this activity (and all above it) 2696 // be cleared when the task is reset, don't lose that information, 2697 // but propagate it up to the next activity. 2698 ActivityRecord next = activities.get(index+1); 2699 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2700 } 2701 } 2702 2703 r.pauseKeyDispatchingLocked(); 2704 2705 adjustFocusedActivityLocked(r); 2706 2707 finishActivityResultsLocked(r, resultCode, resultData); 2708 2709 if (mResumedActivity == r) { 2710 boolean endTask = index <= 0; 2711 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2712 "Prepare close transition: finishing " + r); 2713 mWindowManager.prepareAppTransition(endTask 2714 ? AppTransition.TRANSIT_TASK_CLOSE 2715 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2716 2717 // Tell window manager to prepare for this one to be removed. 2718 mWindowManager.setAppVisibility(r.appToken, false); 2719 2720 if (mPausingActivity == null) { 2721 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2722 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2723 startPausingLocked(false, false); 2724 } 2725 2726 if (endTask) { 2727 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2728 } 2729 } else if (r.state != ActivityState.PAUSING) { 2730 // If the activity is PAUSING, we will complete the finish once 2731 // it is done pausing; else we can just directly finish it here. 2732 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2733 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2734 } else { 2735 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2736 } 2737 2738 return false; 2739 } 2740 2741 static final int FINISH_IMMEDIATELY = 0; 2742 static final int FINISH_AFTER_PAUSE = 1; 2743 static final int FINISH_AFTER_VISIBLE = 2; 2744 2745 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2746 // First things first: if this activity is currently visible, 2747 // and the resumed activity is not yet visible, then hold off on 2748 // finishing until the resumed one becomes visible. 2749 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2750 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2751 mStackSupervisor.mStoppingActivities.add(r); 2752 if (mStackSupervisor.mStoppingActivities.size() > 3 2753 || r.frontOfTask && mTaskHistory.size() <= 1) { 2754 // If we already have a few activities waiting to stop, 2755 // then give up on things going idle and start clearing 2756 // them out. Or if r is the last of activity of the last task the stack 2757 // will be empty and must be cleared immediately. 2758 mStackSupervisor.scheduleIdleLocked(); 2759 } else { 2760 mStackSupervisor.checkReadyForSleepLocked(); 2761 } 2762 } 2763 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2764 + " (finish requested)"); 2765 r.state = ActivityState.STOPPING; 2766 if (oomAdj) { 2767 mService.updateOomAdjLocked(); 2768 } 2769 return r; 2770 } 2771 2772 // make sure the record is cleaned out of other places. 2773 mStackSupervisor.mStoppingActivities.remove(r); 2774 mStackSupervisor.mGoingToSleepActivities.remove(r); 2775 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2776 if (mResumedActivity == r) { 2777 mResumedActivity = null; 2778 } 2779 final ActivityState prevState = r.state; 2780 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2781 r.state = ActivityState.FINISHING; 2782 2783 if (mode == FINISH_IMMEDIATELY 2784 || prevState == ActivityState.STOPPED 2785 || prevState == ActivityState.INITIALIZING) { 2786 // If this activity is already stopped, we can just finish 2787 // it right now. 2788 r.makeFinishing(); 2789 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2790 if (activityRemoved) { 2791 mStackSupervisor.resumeTopActivitiesLocked(); 2792 } 2793 if (DEBUG_CONTAINERS) Slog.d(TAG, 2794 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2795 " destroy returned removed=" + activityRemoved); 2796 return activityRemoved ? null : r; 2797 } 2798 2799 // Need to go through the full pause cycle to get this 2800 // activity into the stopped state and then finish it. 2801 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2802 mStackSupervisor.mFinishingActivities.add(r); 2803 r.resumeKeyDispatchingLocked(); 2804 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2805 return r; 2806 } 2807 2808 void finishAllActivitiesLocked(boolean immediately) { 2809 boolean noActivitiesInStack = true; 2810 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2811 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2812 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2813 final ActivityRecord r = activities.get(activityNdx); 2814 noActivitiesInStack = false; 2815 if (r.finishing && !immediately) { 2816 continue; 2817 } 2818 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2819 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2820 } 2821 } 2822 if (noActivitiesInStack) { 2823 mActivityContainer.onTaskListEmptyLocked(); 2824 } 2825 } 2826 2827 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2828 // Basic case: for simple app-centric recents, we need to recreate 2829 // the task if the affinity has changed. 2830 if (srec == null || srec.task.affinity == null || 2831 !srec.task.affinity.equals(destAffinity)) { 2832 return true; 2833 } 2834 // Document-centric case: an app may be split in to multiple documents; 2835 // they need to re-create their task if this current activity is the root 2836 // of a document, unless simply finishing it will return them to the the 2837 // correct app behind. 2838 if (srec.frontOfTask && srec.task != null) { 2839 // Okay, this activity is at the root of its task. What to do, what to do... 2840 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2841 // Finishing won't return to an application, so we need to recreate. 2842 return true; 2843 } 2844 // We now need to get the task below it to determine what to do. 2845 int taskIdx = mTaskHistory.indexOf(srec.task); 2846 if (taskIdx <= 0) { 2847 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2848 return false; 2849 } 2850 if (taskIdx == 0) { 2851 // At the bottom of the stack, nothing to go back to. 2852 return true; 2853 } 2854 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2855 if (!srec.task.affinity.equals(prevTask.affinity)) { 2856 // These are different apps, so need to recreate. 2857 return true; 2858 } 2859 } 2860 return false; 2861 } 2862 2863 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2864 Intent resultData) { 2865 final ActivityRecord srec = ActivityRecord.forToken(token); 2866 final TaskRecord task = srec.task; 2867 final ArrayList<ActivityRecord> activities = task.mActivities; 2868 final int start = activities.indexOf(srec); 2869 if (!mTaskHistory.contains(task) || (start < 0)) { 2870 return false; 2871 } 2872 int finishTo = start - 1; 2873 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2874 boolean foundParentInTask = false; 2875 final ComponentName dest = destIntent.getComponent(); 2876 if (start > 0 && dest != null) { 2877 for (int i = finishTo; i >= 0; i--) { 2878 ActivityRecord r = activities.get(i); 2879 if (r.info.packageName.equals(dest.getPackageName()) && 2880 r.info.name.equals(dest.getClassName())) { 2881 finishTo = i; 2882 parent = r; 2883 foundParentInTask = true; 2884 break; 2885 } 2886 } 2887 } 2888 2889 IActivityController controller = mService.mController; 2890 if (controller != null) { 2891 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2892 if (next != null) { 2893 // ask watcher if this is allowed 2894 boolean resumeOK = true; 2895 try { 2896 resumeOK = controller.activityResuming(next.packageName); 2897 } catch (RemoteException e) { 2898 mService.mController = null; 2899 Watchdog.getInstance().setActivityController(null); 2900 } 2901 2902 if (!resumeOK) { 2903 return false; 2904 } 2905 } 2906 } 2907 final long origId = Binder.clearCallingIdentity(); 2908 for (int i = start; i > finishTo; i--) { 2909 ActivityRecord r = activities.get(i); 2910 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2911 // Only return the supplied result for the first activity finished 2912 resultCode = Activity.RESULT_CANCELED; 2913 resultData = null; 2914 } 2915 2916 if (parent != null && foundParentInTask) { 2917 final int parentLaunchMode = parent.info.launchMode; 2918 final int destIntentFlags = destIntent.getFlags(); 2919 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2920 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2921 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2922 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2923 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2924 } else { 2925 try { 2926 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2927 destIntent.getComponent(), 0, srec.userId); 2928 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2929 null, aInfo, null, null, parent.appToken, null, 2930 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2931 0, null, true, null, null, null); 2932 foundParentInTask = res == ActivityManager.START_SUCCESS; 2933 } catch (RemoteException e) { 2934 foundParentInTask = false; 2935 } 2936 requestFinishActivityLocked(parent.appToken, resultCode, 2937 resultData, "navigate-up", true); 2938 } 2939 } 2940 Binder.restoreCallingIdentity(origId); 2941 return foundParentInTask; 2942 } 2943 /** 2944 * Perform the common clean-up of an activity record. This is called both 2945 * as part of destroyActivityLocked() (when destroying the client-side 2946 * representation) and cleaning things up as a result of its hosting 2947 * processing going away, in which case there is no remaining client-side 2948 * state to destroy so only the cleanup here is needed. 2949 */ 2950 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2951 boolean setState) { 2952 if (mResumedActivity == r) { 2953 mResumedActivity = null; 2954 } 2955 if (mPausingActivity == r) { 2956 mPausingActivity = null; 2957 } 2958 mService.clearFocusedActivity(r); 2959 2960 r.configDestroy = false; 2961 r.frozenBeforeDestroy = false; 2962 2963 if (setState) { 2964 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2965 r.state = ActivityState.DESTROYED; 2966 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2967 r.app = null; 2968 } 2969 2970 // Make sure this record is no longer in the pending finishes list. 2971 // This could happen, for example, if we are trimming activities 2972 // down to the max limit while they are still waiting to finish. 2973 mStackSupervisor.mFinishingActivities.remove(r); 2974 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2975 2976 // Remove any pending results. 2977 if (r.finishing && r.pendingResults != null) { 2978 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2979 PendingIntentRecord rec = apr.get(); 2980 if (rec != null) { 2981 mService.cancelIntentSenderLocked(rec, false); 2982 } 2983 } 2984 r.pendingResults = null; 2985 } 2986 2987 if (cleanServices) { 2988 cleanUpActivityServicesLocked(r); 2989 } 2990 2991 // Get rid of any pending idle timeouts. 2992 removeTimeoutsForActivityLocked(r); 2993 if (getVisibleBehindActivity() == r) { 2994 mStackSupervisor.requestVisibleBehindLocked(r, false); 2995 } 2996 } 2997 2998 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2999 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3000 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3001 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3002 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3003 r.finishLaunchTickingLocked(); 3004 } 3005 3006 private void removeActivityFromHistoryLocked(ActivityRecord r) { 3007 mStackSupervisor.removeChildActivityContainers(r); 3008 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3009 r.makeFinishing(); 3010 if (DEBUG_ADD_REMOVE) { 3011 RuntimeException here = new RuntimeException("here"); 3012 here.fillInStackTrace(); 3013 Slog.i(TAG, "Removing activity " + r + " from stack"); 3014 } 3015 r.takeFromHistory(); 3016 removeTimeoutsForActivityLocked(r); 3017 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3018 r.state = ActivityState.DESTROYED; 3019 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3020 r.app = null; 3021 mWindowManager.removeAppToken(r.appToken); 3022 if (VALIDATE_TOKENS) { 3023 validateAppTokensLocked(); 3024 } 3025 final TaskRecord task = r.task; 3026 if (task != null && task.removeActivity(r)) { 3027 if (DEBUG_STACK) Slog.i(TAG, 3028 "removeActivityFromHistoryLocked: last activity removed from " + this); 3029 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3030 task.isOverHomeStack()) { 3031 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3032 } 3033 removeTask(task); 3034 } 3035 cleanUpActivityServicesLocked(r); 3036 r.removeUriPermissionsLocked(); 3037 } 3038 3039 /** 3040 * Perform clean-up of service connections in an activity record. 3041 */ 3042 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3043 // Throw away any services that have been bound by this activity. 3044 if (r.connections != null) { 3045 Iterator<ConnectionRecord> it = r.connections.iterator(); 3046 while (it.hasNext()) { 3047 ConnectionRecord c = it.next(); 3048 mService.mServices.removeConnectionLocked(c, null, r); 3049 } 3050 r.connections = null; 3051 } 3052 } 3053 3054 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3055 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3056 msg.obj = new ScheduleDestroyArgs(owner, reason); 3057 mHandler.sendMessage(msg); 3058 } 3059 3060 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3061 boolean lastIsOpaque = false; 3062 boolean activityRemoved = false; 3063 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3064 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3065 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3066 final ActivityRecord r = activities.get(activityNdx); 3067 if (r.finishing) { 3068 continue; 3069 } 3070 if (r.fullscreen) { 3071 lastIsOpaque = true; 3072 } 3073 if (owner != null && r.app != owner) { 3074 continue; 3075 } 3076 if (!lastIsOpaque) { 3077 continue; 3078 } 3079 if (r.isDestroyable()) { 3080 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3081 + " resumed=" + mResumedActivity 3082 + " pausing=" + mPausingActivity + " for reason " + reason); 3083 if (destroyActivityLocked(r, true, reason)) { 3084 activityRemoved = true; 3085 } 3086 } 3087 } 3088 } 3089 if (activityRemoved) { 3090 mStackSupervisor.resumeTopActivitiesLocked(); 3091 } 3092 } 3093 3094 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3095 if (r.isDestroyable()) { 3096 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3097 + " resumed=" + mResumedActivity 3098 + " pausing=" + mPausingActivity + " for reason " + reason); 3099 return destroyActivityLocked(r, true, reason); 3100 } 3101 return false; 3102 } 3103 3104 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3105 String reason) { 3106 // Iterate over tasks starting at the back (oldest) first. 3107 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3108 int maxTasks = tasks.size() / 4; 3109 if (maxTasks < 1) { 3110 maxTasks = 1; 3111 } 3112 int numReleased = 0; 3113 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3114 final TaskRecord task = mTaskHistory.get(taskNdx); 3115 if (!tasks.contains(task)) { 3116 continue; 3117 } 3118 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3119 int curNum = 0; 3120 final ArrayList<ActivityRecord> activities = task.mActivities; 3121 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3122 final ActivityRecord activity = activities.get(actNdx); 3123 if (activity.app == app && activity.isDestroyable()) { 3124 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3125 + " in state " + activity.state + " resumed=" + mResumedActivity 3126 + " pausing=" + mPausingActivity + " for reason " + reason); 3127 destroyActivityLocked(activity, true, reason); 3128 if (activities.get(actNdx) != activity) { 3129 // Was removed from list, back up so we don't miss the next one. 3130 actNdx--; 3131 } 3132 curNum++; 3133 } 3134 } 3135 if (curNum > 0) { 3136 numReleased += curNum; 3137 maxTasks--; 3138 if (mTaskHistory.get(taskNdx) != task) { 3139 // The entire task got removed, back up so we don't miss the next one. 3140 taskNdx--; 3141 } 3142 } 3143 } 3144 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3145 return numReleased; 3146 } 3147 3148 /** 3149 * Destroy the current CLIENT SIDE instance of an activity. This may be 3150 * called both when actually finishing an activity, or when performing 3151 * a configuration switch where we destroy the current client-side object 3152 * but then create a new client-side object for this same HistoryRecord. 3153 */ 3154 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3155 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3156 TAG, "Removing activity from " + reason + ": token=" + r 3157 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3158 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3159 r.userId, System.identityHashCode(r), 3160 r.task.taskId, r.shortComponentName, reason); 3161 3162 boolean removedFromHistory = false; 3163 3164 cleanUpActivityLocked(r, false, false); 3165 3166 final boolean hadApp = r.app != null; 3167 3168 if (hadApp) { 3169 if (removeFromApp) { 3170 r.app.activities.remove(r); 3171 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3172 mService.mHeavyWeightProcess = null; 3173 mService.mHandler.sendEmptyMessage( 3174 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3175 } 3176 if (r.app.activities.isEmpty()) { 3177 // No longer have activities, so update LRU list and oom adj. 3178 mService.updateLruProcessLocked(r.app, false, null); 3179 mService.updateOomAdjLocked(); 3180 } 3181 } 3182 3183 boolean skipDestroy = false; 3184 3185 try { 3186 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3187 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3188 r.configChangeFlags); 3189 } catch (Exception e) { 3190 // We can just ignore exceptions here... if the process 3191 // has crashed, our death notification will clean things 3192 // up. 3193 //Slog.w(TAG, "Exception thrown during finish", e); 3194 if (r.finishing) { 3195 removeActivityFromHistoryLocked(r); 3196 removedFromHistory = true; 3197 skipDestroy = true; 3198 } 3199 } 3200 3201 r.nowVisible = false; 3202 3203 // If the activity is finishing, we need to wait on removing it 3204 // from the list to give it a chance to do its cleanup. During 3205 // that time it may make calls back with its token so we need to 3206 // be able to find it on the list and so we don't want to remove 3207 // it from the list yet. Otherwise, we can just immediately put 3208 // it in the destroyed state since we are not removing it from the 3209 // list. 3210 if (r.finishing && !skipDestroy) { 3211 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3212 + " (destroy requested)"); 3213 r.state = ActivityState.DESTROYING; 3214 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3215 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3216 } else { 3217 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3218 r.state = ActivityState.DESTROYED; 3219 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3220 r.app = null; 3221 } 3222 } else { 3223 // remove this record from the history. 3224 if (r.finishing) { 3225 removeActivityFromHistoryLocked(r); 3226 removedFromHistory = true; 3227 } else { 3228 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3229 r.state = ActivityState.DESTROYED; 3230 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3231 r.app = null; 3232 } 3233 } 3234 3235 r.configChangeFlags = 0; 3236 3237 if (!mLRUActivities.remove(r) && hadApp) { 3238 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3239 } 3240 3241 return removedFromHistory; 3242 } 3243 3244 final void activityDestroyedLocked(IBinder token) { 3245 final long origId = Binder.clearCallingIdentity(); 3246 try { 3247 ActivityRecord r = ActivityRecord.forToken(token); 3248 if (r != null) { 3249 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3250 } 3251 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3252 3253 if (isInStackLocked(token) != null) { 3254 if (r.state == ActivityState.DESTROYING) { 3255 cleanUpActivityLocked(r, true, false); 3256 removeActivityFromHistoryLocked(r); 3257 } 3258 } 3259 mStackSupervisor.resumeTopActivitiesLocked(); 3260 } finally { 3261 Binder.restoreCallingIdentity(origId); 3262 } 3263 } 3264 3265 void releaseBackgroundResources() { 3266 if (hasVisibleBehindActivity() && 3267 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3268 final ActivityRecord r = getVisibleBehindActivity(); 3269 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3270 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3271 " thread=" + r.app.thread); 3272 if (r != null && r.app != null && r.app.thread != null) { 3273 try { 3274 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3275 } catch (RemoteException e) { 3276 } 3277 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3278 } else { 3279 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3280 backgroundResourcesReleased(r.appToken); 3281 } 3282 } 3283 } 3284 3285 final void backgroundResourcesReleased(IBinder token) { 3286 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3287 final ActivityRecord r = getVisibleBehindActivity(); 3288 if (r != null) { 3289 mStackSupervisor.mStoppingActivities.add(r); 3290 setVisibleBehindActivity(null); 3291 } 3292 mStackSupervisor.resumeTopActivitiesLocked(); 3293 } 3294 3295 boolean hasVisibleBehindActivity() { 3296 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3297 } 3298 3299 void setVisibleBehindActivity(ActivityRecord r) { 3300 if (isAttached()) { 3301 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3302 } 3303 } 3304 3305 ActivityRecord getVisibleBehindActivity() { 3306 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3307 } 3308 3309 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3310 ProcessRecord app, String listName) { 3311 int i = list.size(); 3312 if (DEBUG_CLEANUP) Slog.v( 3313 TAG, "Removing app " + app + " from list " + listName 3314 + " with " + i + " entries"); 3315 while (i > 0) { 3316 i--; 3317 ActivityRecord r = list.get(i); 3318 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3319 if (r.app == app) { 3320 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3321 list.remove(i); 3322 removeTimeoutsForActivityLocked(r); 3323 } 3324 } 3325 } 3326 3327 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3328 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3329 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3330 "mStoppingActivities"); 3331 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3332 "mGoingToSleepActivities"); 3333 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3334 "mWaitingVisibleActivities"); 3335 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3336 "mFinishingActivities"); 3337 3338 boolean hasVisibleActivities = false; 3339 3340 // Clean out the history list. 3341 int i = numActivities(); 3342 if (DEBUG_CLEANUP) Slog.v( 3343 TAG, "Removing app " + app + " from history with " + i + " entries"); 3344 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3345 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3346 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3347 final ActivityRecord r = activities.get(activityNdx); 3348 --i; 3349 if (DEBUG_CLEANUP) Slog.v( 3350 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3351 if (r.app == app) { 3352 boolean remove; 3353 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3354 // Don't currently have state for the activity, or 3355 // it is finishing -- always remove it. 3356 remove = true; 3357 } else if (r.launchCount > 2 && 3358 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3359 // We have launched this activity too many times since it was 3360 // able to run, so give up and remove it. 3361 remove = true; 3362 } else { 3363 // The process may be gone, but the activity lives on! 3364 remove = false; 3365 } 3366 if (remove) { 3367 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3368 RuntimeException here = new RuntimeException("here"); 3369 here.fillInStackTrace(); 3370 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3371 + ": haveState=" + r.haveState 3372 + " stateNotNeeded=" + r.stateNotNeeded 3373 + " finishing=" + r.finishing 3374 + " state=" + r.state, here); 3375 } 3376 if (!r.finishing) { 3377 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3378 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3379 r.userId, System.identityHashCode(r), 3380 r.task.taskId, r.shortComponentName, 3381 "proc died without state saved"); 3382 if (r.state == ActivityState.RESUMED) { 3383 mService.updateUsageStats(r, false); 3384 } 3385 } 3386 removeActivityFromHistoryLocked(r); 3387 3388 } else { 3389 // We have the current state for this activity, so 3390 // it can be restarted later when needed. 3391 if (localLOGV) Slog.v( 3392 TAG, "Keeping entry, setting app to null"); 3393 if (r.visible) { 3394 hasVisibleActivities = true; 3395 } 3396 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3397 + r); 3398 r.app = null; 3399 r.nowVisible = false; 3400 if (!r.haveState) { 3401 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3402 "App died, clearing saved state of " + r); 3403 r.icicle = null; 3404 } 3405 } 3406 3407 cleanUpActivityLocked(r, true, true); 3408 } 3409 } 3410 } 3411 3412 return hasVisibleActivities; 3413 } 3414 3415 final void updateTransitLocked(int transit, Bundle options) { 3416 if (options != null) { 3417 ActivityRecord r = topRunningActivityLocked(null); 3418 if (r != null && r.state != ActivityState.RESUMED) { 3419 r.updateOptionsLocked(options); 3420 } else { 3421 ActivityOptions.abort(options); 3422 } 3423 } 3424 mWindowManager.prepareAppTransition(transit, false); 3425 } 3426 3427 void updateTaskMovement(TaskRecord task, boolean toFront) { 3428 if (task.isPersistable) { 3429 task.mLastTimeMoved = System.currentTimeMillis(); 3430 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3431 // recently will be most negative, tasks sent to the bottom before that will be less 3432 // negative. Similarly for recent tasks moved to the top which will be most positive. 3433 if (!toFront) { 3434 task.mLastTimeMoved *= -1; 3435 } 3436 } 3437 } 3438 3439 void moveHomeStackTaskToTop(int homeStackTaskType) { 3440 final int top = mTaskHistory.size() - 1; 3441 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3442 final TaskRecord task = mTaskHistory.get(taskNdx); 3443 if (task.taskType == homeStackTaskType) { 3444 if (DEBUG_TASKS || DEBUG_STACK) 3445 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3446 mTaskHistory.remove(taskNdx); 3447 mTaskHistory.add(top, task); 3448 updateTaskMovement(task, true); 3449 mWindowManager.moveTaskToTop(task.taskId); 3450 return; 3451 } 3452 } 3453 } 3454 3455 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3456 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3457 3458 final int numTasks = mTaskHistory.size(); 3459 final int index = mTaskHistory.indexOf(tr); 3460 if (numTasks == 0 || index < 0) { 3461 // nothing to do! 3462 if (reason != null && 3463 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3464 ActivityOptions.abort(options); 3465 } else { 3466 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3467 } 3468 return; 3469 } 3470 3471 moveToFront(); 3472 3473 // Shift all activities with this task up to the top 3474 // of the stack, keeping them in the same internal order. 3475 insertTaskAtTop(tr); 3476 3477 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3478 if (reason != null && 3479 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3480 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3481 ActivityRecord r = topRunningActivityLocked(null); 3482 if (r != null) { 3483 mNoAnimActivities.add(r); 3484 } 3485 ActivityOptions.abort(options); 3486 } else { 3487 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3488 } 3489 3490 mWindowManager.moveTaskToTop(tr.taskId); 3491 3492 mStackSupervisor.resumeTopActivitiesLocked(); 3493 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3494 3495 if (VALIDATE_TOKENS) { 3496 validateAppTokensLocked(); 3497 } 3498 } 3499 3500 /** 3501 * Worker method for rearranging history stack. Implements the function of moving all 3502 * activities for a specific task (gathering them if disjoint) into a single group at the 3503 * bottom of the stack. 3504 * 3505 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3506 * to premeptively cancel the move. 3507 * 3508 * @param taskId The taskId to collect and move to the bottom. 3509 * @return Returns true if the move completed, false if not. 3510 */ 3511 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3512 final TaskRecord tr = taskForIdLocked(taskId); 3513 if (tr == null) { 3514 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3515 return false; 3516 } 3517 3518 Slog.i(TAG, "moveTaskToBack: " + tr); 3519 3520 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3521 3522 // If we have a watcher, preflight the move before committing to it. First check 3523 // for *other* available tasks, but if none are available, then try again allowing the 3524 // current task to be selected. 3525 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3526 ActivityRecord next = topRunningActivityLocked(null, taskId); 3527 if (next == null) { 3528 next = topRunningActivityLocked(null, 0); 3529 } 3530 if (next != null) { 3531 // ask watcher if this is allowed 3532 boolean moveOK = true; 3533 try { 3534 moveOK = mService.mController.activityResuming(next.packageName); 3535 } catch (RemoteException e) { 3536 mService.mController = null; 3537 Watchdog.getInstance().setActivityController(null); 3538 } 3539 if (!moveOK) { 3540 return false; 3541 } 3542 } 3543 } 3544 3545 if (DEBUG_TRANSITION) Slog.v(TAG, 3546 "Prepare to back transition: task=" + taskId); 3547 3548 mTaskHistory.remove(tr); 3549 mTaskHistory.add(0, tr); 3550 updateTaskMovement(tr, false); 3551 3552 // There is an assumption that moving a task to the back moves it behind the home activity. 3553 // We make sure here that some activity in the stack will launch home. 3554 int numTasks = mTaskHistory.size(); 3555 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3556 final TaskRecord task = mTaskHistory.get(taskNdx); 3557 if (task.isOverHomeStack()) { 3558 break; 3559 } 3560 if (taskNdx == 1) { 3561 // Set the last task before tr to go to home. 3562 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3563 } 3564 } 3565 3566 if (reason != null && 3567 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3568 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3569 ActivityRecord r = topRunningActivityLocked(null); 3570 if (r != null) { 3571 mNoAnimActivities.add(r); 3572 } 3573 } else { 3574 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3575 } 3576 mWindowManager.moveTaskToBottom(taskId); 3577 3578 if (VALIDATE_TOKENS) { 3579 validateAppTokensLocked(); 3580 } 3581 3582 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3583 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3584 final int taskToReturnTo = tr.getTaskToReturnTo(); 3585 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3586 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3587 } 3588 3589 mStackSupervisor.resumeTopActivitiesLocked(); 3590 return true; 3591 } 3592 3593 static final void logStartActivity(int tag, ActivityRecord r, 3594 TaskRecord task) { 3595 final Uri data = r.intent.getData(); 3596 final String strData = data != null ? data.toSafeString() : null; 3597 3598 EventLog.writeEvent(tag, 3599 r.userId, System.identityHashCode(r), task.taskId, 3600 r.shortComponentName, r.intent.getAction(), 3601 r.intent.getType(), strData, r.intent.getFlags()); 3602 } 3603 3604 /** 3605 * Make sure the given activity matches the current configuration. Returns 3606 * false if the activity had to be destroyed. Returns true if the 3607 * configuration is the same, or the activity will remain running as-is 3608 * for whatever reason. Ensures the HistoryRecord is updated with the 3609 * correct configuration and all other bookkeeping is handled. 3610 */ 3611 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3612 int globalChanges) { 3613 if (mConfigWillChange) { 3614 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3615 "Skipping config check (will change): " + r); 3616 return true; 3617 } 3618 3619 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3620 "Ensuring correct configuration: " + r); 3621 3622 // Short circuit: if the two configurations are the exact same 3623 // object (the common case), then there is nothing to do. 3624 Configuration newConfig = mService.mConfiguration; 3625 if (r.configuration == newConfig && !r.forceNewConfig) { 3626 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3627 "Configuration unchanged in " + r); 3628 return true; 3629 } 3630 3631 // We don't worry about activities that are finishing. 3632 if (r.finishing) { 3633 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3634 "Configuration doesn't matter in finishing " + r); 3635 r.stopFreezingScreenLocked(false); 3636 return true; 3637 } 3638 3639 // Okay we now are going to make this activity have the new config. 3640 // But then we need to figure out how it needs to deal with that. 3641 Configuration oldConfig = r.configuration; 3642 r.configuration = newConfig; 3643 3644 // Determine what has changed. May be nothing, if this is a config 3645 // that has come back from the app after going idle. In that case 3646 // we just want to leave the official config object now in the 3647 // activity and do nothing else. 3648 final int changes = oldConfig.diff(newConfig); 3649 if (changes == 0 && !r.forceNewConfig) { 3650 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3651 "Configuration no differences in " + r); 3652 return true; 3653 } 3654 3655 // If the activity isn't currently running, just leave the new 3656 // configuration and it will pick that up next time it starts. 3657 if (r.app == null || r.app.thread == null) { 3658 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3659 "Configuration doesn't matter not running " + r); 3660 r.stopFreezingScreenLocked(false); 3661 r.forceNewConfig = false; 3662 return true; 3663 } 3664 3665 // Figure out how to handle the changes between the configurations. 3666 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3667 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3668 + Integer.toHexString(changes) + ", handles=0x" 3669 + Integer.toHexString(r.info.getRealConfigChanged()) 3670 + ", newConfig=" + newConfig); 3671 } 3672 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3673 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3674 r.configChangeFlags |= changes; 3675 r.startFreezingScreenLocked(r.app, globalChanges); 3676 r.forceNewConfig = false; 3677 if (r.app == null || r.app.thread == null) { 3678 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3679 "Config is destroying non-running " + r); 3680 destroyActivityLocked(r, true, "config"); 3681 } else if (r.state == ActivityState.PAUSING) { 3682 // A little annoying: we are waiting for this activity to 3683 // finish pausing. Let's not do anything now, but just 3684 // flag that it needs to be restarted when done pausing. 3685 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3686 "Config is skipping already pausing " + r); 3687 r.configDestroy = true; 3688 return true; 3689 } else if (r.state == ActivityState.RESUMED) { 3690 // Try to optimize this case: the configuration is changing 3691 // and we need to restart the top, resumed activity. 3692 // Instead of doing the normal handshaking, just say 3693 // "restart!". 3694 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3695 "Config is relaunching resumed " + r); 3696 relaunchActivityLocked(r, r.configChangeFlags, true); 3697 r.configChangeFlags = 0; 3698 } else { 3699 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3700 "Config is relaunching non-resumed " + r); 3701 relaunchActivityLocked(r, r.configChangeFlags, false); 3702 r.configChangeFlags = 0; 3703 } 3704 3705 // All done... tell the caller we weren't able to keep this 3706 // activity around. 3707 return false; 3708 } 3709 3710 // Default case: the activity can handle this new configuration, so 3711 // hand it over. Note that we don't need to give it the new 3712 // configuration, since we always send configuration changes to all 3713 // process when they happen so it can just use whatever configuration 3714 // it last got. 3715 if (r.app != null && r.app.thread != null) { 3716 try { 3717 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3718 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3719 } catch (RemoteException e) { 3720 // If process died, whatever. 3721 } 3722 } 3723 r.stopFreezingScreenLocked(false); 3724 3725 return true; 3726 } 3727 3728 private boolean relaunchActivityLocked(ActivityRecord r, 3729 int changes, boolean andResume) { 3730 List<ResultInfo> results = null; 3731 List<Intent> newIntents = null; 3732 if (andResume) { 3733 results = r.results; 3734 newIntents = r.newIntents; 3735 } 3736 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3737 + " with results=" + results + " newIntents=" + newIntents 3738 + " andResume=" + andResume); 3739 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3740 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3741 r.task.taskId, r.shortComponentName); 3742 3743 r.startFreezingScreenLocked(r.app, 0); 3744 3745 mStackSupervisor.removeChildActivityContainers(r); 3746 3747 try { 3748 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3749 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3750 + r); 3751 r.forceNewConfig = false; 3752 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3753 changes, !andResume, new Configuration(mService.mConfiguration)); 3754 // Note: don't need to call pauseIfSleepingLocked() here, because 3755 // the caller will only pass in 'andResume' if this activity is 3756 // currently resumed, which implies we aren't sleeping. 3757 } catch (RemoteException e) { 3758 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3759 } 3760 3761 if (andResume) { 3762 r.results = null; 3763 r.newIntents = null; 3764 r.state = ActivityState.RESUMED; 3765 } else { 3766 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3767 r.state = ActivityState.PAUSED; 3768 } 3769 3770 return true; 3771 } 3772 3773 boolean willActivityBeVisibleLocked(IBinder token) { 3774 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3775 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3776 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3777 final ActivityRecord r = activities.get(activityNdx); 3778 if (r.appToken == token) { 3779 return true; 3780 } 3781 if (r.fullscreen && !r.finishing) { 3782 return false; 3783 } 3784 } 3785 } 3786 final ActivityRecord r = ActivityRecord.forToken(token); 3787 if (r == null) { 3788 return false; 3789 } 3790 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3791 + " would have returned true for r=" + r); 3792 return !r.finishing; 3793 } 3794 3795 void closeSystemDialogsLocked() { 3796 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3797 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3798 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3799 final ActivityRecord r = activities.get(activityNdx); 3800 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3801 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3802 } 3803 } 3804 } 3805 } 3806 3807 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3808 boolean didSomething = false; 3809 TaskRecord lastTask = null; 3810 ComponentName homeActivity = null; 3811 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3812 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3813 int numActivities = activities.size(); 3814 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3815 ActivityRecord r = activities.get(activityNdx); 3816 final boolean samePackage = r.packageName.equals(name) 3817 || (name == null && r.userId == userId); 3818 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3819 && (samePackage || r.task == lastTask) 3820 && (r.app == null || evenPersistent || !r.app.persistent)) { 3821 if (!doit) { 3822 if (r.finishing) { 3823 // If this activity is just finishing, then it is not 3824 // interesting as far as something to stop. 3825 continue; 3826 } 3827 return true; 3828 } 3829 if (r.isHomeActivity()) { 3830 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3831 Slog.i(TAG, "Skip force-stop again " + r); 3832 continue; 3833 } else { 3834 homeActivity = r.realActivity; 3835 } 3836 } 3837 didSomething = true; 3838 Slog.i(TAG, " Force finishing activity " + r); 3839 if (samePackage) { 3840 if (r.app != null) { 3841 r.app.removed = true; 3842 } 3843 r.app = null; 3844 } 3845 lastTask = r.task; 3846 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3847 true)) { 3848 // r has been deleted from mActivities, accommodate. 3849 --numActivities; 3850 --activityNdx; 3851 } 3852 } 3853 } 3854 } 3855 return didSomething; 3856 } 3857 3858 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3859 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3860 final TaskRecord task = mTaskHistory.get(taskNdx); 3861 ActivityRecord r = null; 3862 ActivityRecord top = null; 3863 int numActivities = 0; 3864 int numRunning = 0; 3865 final ArrayList<ActivityRecord> activities = task.mActivities; 3866 if (activities.isEmpty()) { 3867 continue; 3868 } 3869 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3870 continue; 3871 } 3872 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3873 r = activities.get(activityNdx); 3874 3875 // Initialize state for next task if needed. 3876 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3877 top = r; 3878 numActivities = numRunning = 0; 3879 } 3880 3881 // Add 'r' into the current task. 3882 numActivities++; 3883 if (r.app != null && r.app.thread != null) { 3884 numRunning++; 3885 } 3886 3887 if (localLOGV) Slog.v( 3888 TAG, r.intent.getComponent().flattenToShortString() 3889 + ": task=" + r.task); 3890 } 3891 3892 RunningTaskInfo ci = new RunningTaskInfo(); 3893 ci.id = task.taskId; 3894 ci.baseActivity = r.intent.getComponent(); 3895 ci.topActivity = top.intent.getComponent(); 3896 ci.lastActiveTime = task.lastActiveTime; 3897 3898 if (top.task != null) { 3899 ci.description = top.task.lastDescription; 3900 } 3901 ci.numActivities = numActivities; 3902 ci.numRunning = numRunning; 3903 //System.out.println( 3904 // "#" + maxNum + ": " + " descr=" + ci.description); 3905 list.add(ci); 3906 } 3907 } 3908 3909 public void unhandledBackLocked() { 3910 final int top = mTaskHistory.size() - 1; 3911 if (DEBUG_SWITCH) Slog.d( 3912 TAG, "Performing unhandledBack(): top activity at " + top); 3913 if (top >= 0) { 3914 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3915 int activityTop = activities.size() - 1; 3916 if (activityTop > 0) { 3917 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3918 "unhandled-back", true); 3919 } 3920 } 3921 } 3922 3923 /** 3924 * Reset local parameters because an app's activity died. 3925 * @param app The app of the activity that died. 3926 * @return result from removeHistoryRecordsForAppLocked. 3927 */ 3928 boolean handleAppDiedLocked(ProcessRecord app) { 3929 if (mPausingActivity != null && mPausingActivity.app == app) { 3930 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3931 "App died while pausing: " + mPausingActivity); 3932 mPausingActivity = null; 3933 } 3934 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3935 mLastPausedActivity = null; 3936 mLastNoHistoryActivity = null; 3937 } 3938 3939 return removeHistoryRecordsForAppLocked(app); 3940 } 3941 3942 void handleAppCrashLocked(ProcessRecord app) { 3943 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3944 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3945 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3946 final ActivityRecord r = activities.get(activityNdx); 3947 if (r.app == app) { 3948 Slog.w(TAG, " Force finishing activity " 3949 + r.intent.getComponent().flattenToShortString()); 3950 // Force the destroy to skip right to removal. 3951 r.app = null; 3952 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3953 } 3954 } 3955 } 3956 } 3957 3958 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3959 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3960 boolean printed = false; 3961 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3962 final TaskRecord task = mTaskHistory.get(taskNdx); 3963 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3964 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3965 dumpClient, dumpPackage, needSep, header, 3966 " Task id #" + task.taskId); 3967 if (printed) { 3968 header = null; 3969 } 3970 } 3971 return printed; 3972 } 3973 3974 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3975 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3976 3977 if ("all".equals(name)) { 3978 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3979 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3980 } 3981 } else if ("top".equals(name)) { 3982 final int top = mTaskHistory.size() - 1; 3983 if (top >= 0) { 3984 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3985 int listTop = list.size() - 1; 3986 if (listTop >= 0) { 3987 activities.add(list.get(listTop)); 3988 } 3989 } 3990 } else { 3991 ItemMatcher matcher = new ItemMatcher(); 3992 matcher.build(name); 3993 3994 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3995 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3996 if (matcher.match(r1, r1.intent.getComponent())) { 3997 activities.add(r1); 3998 } 3999 } 4000 } 4001 } 4002 4003 return activities; 4004 } 4005 4006 ActivityRecord restartPackage(String packageName) { 4007 ActivityRecord starting = topRunningActivityLocked(null); 4008 4009 // All activities that came from the package must be 4010 // restarted as if there was a config change. 4011 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4012 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4013 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4014 final ActivityRecord a = activities.get(activityNdx); 4015 if (a.info.packageName.equals(packageName)) { 4016 a.forceNewConfig = true; 4017 if (starting != null && a == starting && a.visible) { 4018 a.startFreezingScreenLocked(starting.app, 4019 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4020 } 4021 } 4022 } 4023 } 4024 4025 return starting; 4026 } 4027 4028 void removeTask(TaskRecord task) { 4029 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4030 mWindowManager.removeTask(task.taskId); 4031 final ActivityRecord r = mResumedActivity; 4032 if (r != null && r.task == task) { 4033 mResumedActivity = null; 4034 } 4035 4036 final int taskNdx = mTaskHistory.indexOf(task); 4037 final int topTaskNdx = mTaskHistory.size() - 1; 4038 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4039 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4040 if (!nextTask.isOverHomeStack()) { 4041 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4042 } 4043 } 4044 mTaskHistory.remove(task); 4045 updateTaskMovement(task, true); 4046 4047 if (task.mActivities.isEmpty()) { 4048 final boolean isVoiceSession = task.voiceSession != null; 4049 if (isVoiceSession) { 4050 try { 4051 task.voiceSession.taskFinished(task.intent, task.taskId); 4052 } catch (RemoteException e) { 4053 } 4054 } 4055 if (task.autoRemoveFromRecents() || isVoiceSession) { 4056 // Task creator asked to remove this when done, or this task was a voice 4057 // interaction, so it should not remain on the recent tasks list. 4058 mService.mRecentTasks.remove(task); 4059 task.removedFromRecents(mService.mTaskPersister); 4060 } 4061 } 4062 4063 if (mTaskHistory.isEmpty()) { 4064 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4065 if (isOnHomeDisplay()) { 4066 mStackSupervisor.moveHomeStack(!isHomeStack()); 4067 } 4068 if (mStacks != null) { 4069 mStacks.remove(this); 4070 mStacks.add(0, this); 4071 } 4072 mActivityContainer.onTaskListEmptyLocked(); 4073 } 4074 } 4075 4076 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4077 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4078 boolean toTop) { 4079 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4080 voiceInteractor); 4081 addTask(task, toTop, false); 4082 return task; 4083 } 4084 4085 ArrayList<TaskRecord> getAllTasks() { 4086 return new ArrayList<TaskRecord>(mTaskHistory); 4087 } 4088 4089 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4090 task.stack = this; 4091 if (toTop) { 4092 insertTaskAtTop(task); 4093 } else { 4094 mTaskHistory.add(0, task); 4095 updateTaskMovement(task, false); 4096 } 4097 if (!moving && task.voiceSession != null) { 4098 try { 4099 task.voiceSession.taskStarted(task.intent, task.taskId); 4100 } catch (RemoteException e) { 4101 } 4102 } 4103 } 4104 4105 public int getStackId() { 4106 return mStackId; 4107 } 4108 4109 @Override 4110 public String toString() { 4111 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4112 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4113 } 4114} 4115