ActivityStack.java revision e042bf2b22b391f13d8e43ddcd657183992c7197
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 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 245 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 246 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 247 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 248 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 249 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 250 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 251 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 252 253 static class ScheduleDestroyArgs { 254 final ProcessRecord mOwner; 255 final String mReason; 256 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 257 mOwner = owner; 258 mReason = reason; 259 } 260 } 261 262 final Handler mHandler; 263 264 final class ActivityStackHandler extends Handler { 265 //public Handler() { 266 // if (localLOGV) Slog.v(TAG, "Handler started!"); 267 //} 268 ActivityStackHandler(Looper looper) { 269 super(looper); 270 } 271 272 @Override 273 public void handleMessage(Message msg) { 274 switch (msg.what) { 275 case PAUSE_TIMEOUT_MSG: { 276 ActivityRecord r = (ActivityRecord)msg.obj; 277 // We don't at this point know if the activity is fullscreen, 278 // so we need to be conservative and assume it isn't. 279 Slog.w(TAG, "Activity pause timeout for " + r); 280 synchronized (mService) { 281 if (r.app != null) { 282 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 283 } 284 activityPausedLocked(r.appToken, true); 285 } 286 } break; 287 case LAUNCH_TICK_MSG: { 288 ActivityRecord r = (ActivityRecord)msg.obj; 289 synchronized (mService) { 290 if (r.continueLaunchTickingLocked()) { 291 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 292 } 293 } 294 } break; 295 case DESTROY_TIMEOUT_MSG: { 296 ActivityRecord r = (ActivityRecord)msg.obj; 297 // We don't at this point know if the activity is fullscreen, 298 // so we need to be conservative and assume it isn't. 299 Slog.w(TAG, "Activity destroy timeout for " + r); 300 synchronized (mService) { 301 activityDestroyedLocked(r != null ? r.appToken : null); 302 } 303 } break; 304 case STOP_TIMEOUT_MSG: { 305 ActivityRecord r = (ActivityRecord)msg.obj; 306 // We don't at this point know if the activity is fullscreen, 307 // so we need to be conservative and assume it isn't. 308 Slog.w(TAG, "Activity stop timeout for " + r); 309 synchronized (mService) { 310 if (r.isInHistory()) { 311 activityStoppedLocked(r, null, null, null); 312 } 313 } 314 } break; 315 case DESTROY_ACTIVITIES_MSG: { 316 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 317 synchronized (mService) { 318 destroyActivitiesLocked(args.mOwner, args.mReason); 319 } 320 } break; 321 case TRANSLUCENT_TIMEOUT_MSG: { 322 synchronized (mService) { 323 notifyActivityDrawnLocked(null); 324 } 325 } break; 326 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 327 synchronized (mService) { 328 final ActivityRecord r = getVisibleBehindActivity(); 329 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 330 if (r != null) { 331 mService.killAppAtUsersRequest(r.app, null); 332 } 333 } 334 } break; 335 } 336 } 337 } 338 339 int numActivities() { 340 int count = 0; 341 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 342 count += mTaskHistory.get(taskNdx).mActivities.size(); 343 } 344 return count; 345 } 346 347 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 348 mActivityContainer = activityContainer; 349 mStackSupervisor = activityContainer.getOuter(); 350 mService = mStackSupervisor.mService; 351 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 352 mWindowManager = mService.mWindowManager; 353 mStackId = activityContainer.mStackId; 354 mCurrentUser = mService.mCurrentUserId; 355 } 356 357 /** 358 * Checks whether the userid is a profile of the current user. 359 */ 360 private boolean isCurrentProfileLocked(int userId) { 361 if (userId == mCurrentUser) return true; 362 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 363 if (mService.mCurrentProfileIds[i] == userId) return true; 364 } 365 return false; 366 } 367 368 boolean okToShowLocked(ActivityRecord r) { 369 return isCurrentProfileLocked(r.userId) 370 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 371 } 372 373 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 374 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 375 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 376 if (r != null) { 377 return r; 378 } 379 } 380 return null; 381 } 382 383 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 384 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 385 final TaskRecord task = mTaskHistory.get(taskNdx); 386 final ArrayList<ActivityRecord> activities = task.mActivities; 387 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 388 ActivityRecord r = activities.get(activityNdx); 389 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 390 return r; 391 } 392 } 393 } 394 return null; 395 } 396 397 /** 398 * This is a simplified version of topRunningActivityLocked that provides a number of 399 * optional skip-over modes. It is intended for use with the ActivityController hook only. 400 * 401 * @param token If non-null, any history records matching this token will be skipped. 402 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 403 * 404 * @return Returns the HistoryRecord of the next activity on the stack. 405 */ 406 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 407 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 408 TaskRecord task = mTaskHistory.get(taskNdx); 409 if (task.taskId == taskId) { 410 continue; 411 } 412 ArrayList<ActivityRecord> activities = task.mActivities; 413 for (int i = activities.size() - 1; i >= 0; --i) { 414 final ActivityRecord r = activities.get(i); 415 // Note: the taskId check depends on real taskId fields being non-zero 416 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 417 return r; 418 } 419 } 420 } 421 return null; 422 } 423 424 final ActivityRecord topActivity() { 425 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 426 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 427 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 428 final ActivityRecord r = activities.get(activityNdx); 429 if (!r.finishing) { 430 return r; 431 } 432 } 433 } 434 return null; 435 } 436 437 final TaskRecord topTask() { 438 final int size = mTaskHistory.size(); 439 if (size > 0) { 440 return mTaskHistory.get(size - 1); 441 } 442 return null; 443 } 444 445 TaskRecord taskForIdLocked(int id) { 446 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 447 final TaskRecord task = mTaskHistory.get(taskNdx); 448 if (task.taskId == id) { 449 return task; 450 } 451 } 452 return null; 453 } 454 455 ActivityRecord isInStackLocked(IBinder token) { 456 final ActivityRecord r = ActivityRecord.forToken(token); 457 if (r != null) { 458 final TaskRecord task = r.task; 459 if (task != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 460 if (task.stack != this) Slog.w(TAG, 461 "Illegal state! task does not point to stack it is in."); 462 return r; 463 } 464 } 465 return null; 466 } 467 468 final boolean updateLRUListLocked(ActivityRecord r) { 469 final boolean hadit = mLRUActivities.remove(r); 470 mLRUActivities.add(r); 471 return hadit; 472 } 473 474 final boolean isHomeStack() { 475 return mStackId == HOME_STACK_ID; 476 } 477 478 final boolean isOnHomeDisplay() { 479 return isAttached() && 480 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 481 } 482 483 final void moveToFront() { 484 if (isAttached()) { 485 if (isOnHomeDisplay()) { 486 mStackSupervisor.moveHomeStack(isHomeStack()); 487 } 488 mStacks.remove(this); 489 mStacks.add(this); 490 } 491 } 492 493 final boolean isAttached() { 494 return mStacks != null; 495 } 496 497 /** 498 * Returns the top activity in any existing task matching the given 499 * Intent. Returns null if no such task is found. 500 */ 501 ActivityRecord findTaskLocked(ActivityRecord target) { 502 Intent intent = target.intent; 503 ActivityInfo info = target.info; 504 ComponentName cls = intent.getComponent(); 505 if (info.targetActivity != null) { 506 cls = new ComponentName(info.packageName, info.targetActivity); 507 } 508 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 509 boolean isDocument = intent != null & intent.isDocument(); 510 // If documentData is non-null then it must match the existing task data. 511 Uri documentData = isDocument ? intent.getData() : null; 512 513 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 514 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 515 final TaskRecord task = mTaskHistory.get(taskNdx); 516 if (task.voiceSession != null) { 517 // We never match voice sessions; those always run independently. 518 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 519 continue; 520 } 521 if (task.userId != userId) { 522 // Looking for a different task. 523 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 524 continue; 525 } 526 final ActivityRecord r = task.getTopActivity(); 527 if (r == null || r.finishing || r.userId != userId || 528 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 529 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 530 continue; 531 } 532 533 final Intent taskIntent = task.intent; 534 final Intent affinityIntent = task.affinityIntent; 535 final boolean taskIsDocument; 536 final Uri taskDocumentData; 537 if (taskIntent != null && taskIntent.isDocument()) { 538 taskIsDocument = true; 539 taskDocumentData = taskIntent.getData(); 540 } else if (affinityIntent != null && affinityIntent.isDocument()) { 541 taskIsDocument = true; 542 taskDocumentData = affinityIntent.getData(); 543 } else { 544 taskIsDocument = false; 545 taskDocumentData = null; 546 } 547 548 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 549 + taskIntent.getComponent().flattenToShortString() 550 + "/aff=" + r.task.rootAffinity + " to new cls=" 551 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 552 if (!isDocument && !taskIsDocument && task.rootAffinity != null) { 553 if (task.rootAffinity.equals(target.taskAffinity)) { 554 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 555 return r; 556 } 557 } else if (taskIntent != null && taskIntent.getComponent() != null && 558 taskIntent.getComponent().compareTo(cls) == 0 && 559 Objects.equals(documentData, taskDocumentData)) { 560 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 561 //dump(); 562 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 563 + r.intent); 564 return r; 565 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 566 affinityIntent.getComponent().compareTo(cls) == 0 && 567 Objects.equals(documentData, taskDocumentData)) { 568 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 569 //dump(); 570 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 571 + r.intent); 572 return r; 573 } else if (DEBUG_TASKS) { 574 Slog.d(TAG, "Not a match: " + task); 575 } 576 } 577 578 return null; 579 } 580 581 /** 582 * Returns the first activity (starting from the top of the stack) that 583 * is the same as the given activity. Returns null if no such activity 584 * is found. 585 */ 586 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 587 ComponentName cls = intent.getComponent(); 588 if (info.targetActivity != null) { 589 cls = new ComponentName(info.packageName, info.targetActivity); 590 } 591 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 592 593 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 594 TaskRecord task = mTaskHistory.get(taskNdx); 595 if (!isCurrentProfileLocked(task.userId)) { 596 return null; 597 } 598 final ArrayList<ActivityRecord> activities = task.mActivities; 599 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 600 ActivityRecord r = activities.get(activityNdx); 601 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 602 //Slog.i(TAG, "Found matching class!"); 603 //dump(); 604 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 605 return r; 606 } 607 } 608 } 609 610 return null; 611 } 612 613 /* 614 * Move the activities around in the stack to bring a user to the foreground. 615 */ 616 final void switchUserLocked(int userId) { 617 if (mCurrentUser == userId) { 618 return; 619 } 620 mCurrentUser = userId; 621 622 // Move userId's tasks to the top. 623 int index = mTaskHistory.size(); 624 for (int i = 0; i < index; ) { 625 TaskRecord task = mTaskHistory.get(i); 626 if (isCurrentProfileLocked(task.userId)) { 627 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 628 " moving " + task + " to top"); 629 mTaskHistory.remove(i); 630 mTaskHistory.add(task); 631 --index; 632 // Use same value for i. 633 } else { 634 ++i; 635 } 636 } 637 if (VALIDATE_TOKENS) { 638 validateAppTokensLocked(); 639 } 640 } 641 642 void minimalResumeActivityLocked(ActivityRecord r) { 643 r.state = ActivityState.RESUMED; 644 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 645 + " (starting new instance)"); 646 r.stopped = false; 647 mResumedActivity = r; 648 r.task.touchActiveTime(); 649 mService.addRecentTaskLocked(r.task); 650 completeResumeLocked(r); 651 mStackSupervisor.checkReadyForSleepLocked(); 652 setLaunchTime(r); 653 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 654 } 655 656 private void startLaunchTraces() { 657 if (mFullyDrawnStartTime != 0) { 658 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 659 } 660 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 661 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 662 } 663 664 private void stopFullyDrawnTraceIfNeeded() { 665 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 666 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 667 mFullyDrawnStartTime = 0; 668 } 669 } 670 671 void setLaunchTime(ActivityRecord r) { 672 if (r.displayStartTime == 0) { 673 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 674 if (mLaunchStartTime == 0) { 675 startLaunchTraces(); 676 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 677 } 678 } else if (mLaunchStartTime == 0) { 679 startLaunchTraces(); 680 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 681 } 682 } 683 684 void clearLaunchTime(ActivityRecord r) { 685 // Make sure that there is no activity waiting for this to launch. 686 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 687 r.displayStartTime = r.fullyDrawnStartTime = 0; 688 } else { 689 mStackSupervisor.removeTimeoutsForActivityLocked(r); 690 mStackSupervisor.scheduleIdleTimeoutLocked(r); 691 } 692 } 693 694 void awakeFromSleepingLocked() { 695 // Ensure activities are no longer sleeping. 696 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 697 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 698 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 699 activities.get(activityNdx).setSleeping(false); 700 } 701 } 702 } 703 704 /** 705 * @return true if something must be done before going to sleep. 706 */ 707 boolean checkReadyForSleepLocked() { 708 if (mResumedActivity != null) { 709 // Still have something resumed; can't sleep until it is paused. 710 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 711 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 712 startPausingLocked(false, true, false, false); 713 return true; 714 } 715 if (mPausingActivity != null) { 716 // Still waiting for something to pause; can't sleep yet. 717 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 718 return true; 719 } 720 721 return false; 722 } 723 724 void goToSleep() { 725 ensureActivitiesVisibleLocked(null, 0); 726 727 // Make sure any stopped but visible activities are now sleeping. 728 // This ensures that the activity's onStop() is called. 729 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 730 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 731 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 732 final ActivityRecord r = activities.get(activityNdx); 733 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 734 r.setSleeping(true); 735 } 736 } 737 } 738 } 739 740 /** 741 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 742 * again when requested. 743 */ 744 private void invalidateLastScreenshot() { 745 mLastScreenshotActivity = null; 746 if (mLastScreenshotBitmap != null) { 747 mLastScreenshotBitmap.recycle(); 748 } 749 mLastScreenshotBitmap = null; 750 } 751 752 public final Bitmap screenshotActivities(ActivityRecord who) { 753 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 754 if (who.noDisplay) { 755 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 756 return null; 757 } 758 759 if (isHomeStack()) { 760 // This is an optimization -- since we never show Home or Recents within Recents itself, 761 // we can just go ahead and skip taking the screenshot if this is the home stack. In 762 // the case where the most recent task is not the task that was supplied, then the stack 763 // has changed, so invalidate the last screenshot(). 764 invalidateLastScreenshot(); 765 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 766 return null; 767 } 768 769 int w = mService.mThumbnailWidth; 770 int h = mService.mThumbnailHeight; 771 if (w > 0) { 772 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 773 || mLastScreenshotActivity.state == ActivityState.RESUMED 774 || mLastScreenshotBitmap.getWidth() != w 775 || mLastScreenshotBitmap.getHeight() != h) { 776 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 777 mLastScreenshotActivity = who; 778 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 779 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 780 } 781 if (mLastScreenshotBitmap != null) { 782 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 783 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 784 } 785 } 786 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 787 return null; 788 } 789 790 /** 791 * Start pausing the currently resumed activity. It is an error to call this if there 792 * is already an activity being paused or there is no resumed activity. 793 * 794 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 795 * @param uiSleeping True if this is happening with the user interface going to sleep (the 796 * screen turning off). 797 * @param resuming True if this is being called as part of resuming the top activity, so 798 * we shouldn't try to instigate a resume here. 799 * @param dontWait True if the caller does not want to wait for the pause to complete. If 800 * set to true, we will immediately complete the pause here before returning. 801 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 802 * it to tell us when it is done. 803 */ 804 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 805 boolean dontWait) { 806 if (mPausingActivity != null) { 807 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity); 808 completePauseLocked(false); 809 } 810 ActivityRecord prev = mResumedActivity; 811 if (prev == null) { 812 if (!resuming) { 813 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 814 mStackSupervisor.resumeTopActivitiesLocked(); 815 } 816 return false; 817 } 818 819 if (mActivityContainer.mParentActivity == null) { 820 // Top level stack, not a child. Look for child stacks. 821 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 822 } 823 824 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 825 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 826 mResumedActivity = null; 827 mPausingActivity = prev; 828 mLastPausedActivity = prev; 829 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 830 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 831 prev.state = ActivityState.PAUSING; 832 prev.task.touchActiveTime(); 833 clearLaunchTime(prev); 834 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 835 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 836 prev.updateThumbnail(screenshotActivities(prev), null); 837 } 838 stopFullyDrawnTraceIfNeeded(); 839 840 mService.updateCpuStats(); 841 842 if (prev.app != null && prev.app.thread != null) { 843 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 844 try { 845 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 846 prev.userId, System.identityHashCode(prev), 847 prev.shortComponentName); 848 mService.updateUsageStats(prev, false); 849 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 850 userLeaving, prev.configChangeFlags, dontWait); 851 } catch (Exception e) { 852 // Ignore exception, if process died other code will cleanup. 853 Slog.w(TAG, "Exception thrown during pause", e); 854 mPausingActivity = null; 855 mLastPausedActivity = null; 856 mLastNoHistoryActivity = null; 857 } 858 } else { 859 mPausingActivity = null; 860 mLastPausedActivity = null; 861 mLastNoHistoryActivity = null; 862 } 863 864 // If we are not going to sleep, we want to ensure the device is 865 // awake until the next activity is started. 866 if (!mService.isSleepingOrShuttingDown()) { 867 mStackSupervisor.acquireLaunchWakelock(); 868 } 869 870 if (mPausingActivity != null) { 871 // Have the window manager pause its key dispatching until the new 872 // activity has started. If we're pausing the activity just because 873 // the screen is being turned off and the UI is sleeping, don't interrupt 874 // key dispatch; the same activity will pick it up again on wakeup. 875 if (!uiSleeping) { 876 prev.pauseKeyDispatchingLocked(); 877 } else { 878 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 879 } 880 881 if (dontWait) { 882 // If the caller said they don't want to wait for the pause, then complete 883 // the pause now. 884 completePauseLocked(false); 885 return false; 886 887 } else { 888 // Schedule a pause timeout in case the app doesn't respond. 889 // We don't give it much time because this directly impacts the 890 // responsiveness seen by the user. 891 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 892 msg.obj = prev; 893 prev.pauseTime = SystemClock.uptimeMillis(); 894 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 895 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 896 return true; 897 } 898 899 } else { 900 // This activity failed to schedule the 901 // pause, so just treat it as being paused now. 902 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 903 if (!resuming) { 904 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 905 } 906 return false; 907 } 908 } 909 910 final void activityPausedLocked(IBinder token, boolean timeout) { 911 if (DEBUG_PAUSE) Slog.v( 912 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 913 914 final ActivityRecord r = isInStackLocked(token); 915 if (r != null) { 916 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 917 if (mPausingActivity == r) { 918 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 919 + (timeout ? " (due to timeout)" : " (pause complete)")); 920 completePauseLocked(true); 921 } else { 922 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 923 r.userId, System.identityHashCode(r), r.shortComponentName, 924 mPausingActivity != null 925 ? mPausingActivity.shortComponentName : "(none)"); 926 } 927 } 928 } 929 930 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 931 PersistableBundle persistentState, CharSequence description) { 932 if (r.state != ActivityState.STOPPING) { 933 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 934 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 935 return; 936 } 937 if (persistentState != null) { 938 r.persistentState = persistentState; 939 mService.notifyTaskPersisterLocked(r.task, false); 940 } 941 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 942 if (icicle != null) { 943 // If icicle is null, this is happening due to a timeout, so we 944 // haven't really saved the state. 945 r.icicle = icicle; 946 r.haveState = true; 947 r.launchCount = 0; 948 r.updateThumbnail(null, description); 949 } 950 if (!r.stopped) { 951 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 952 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 953 r.stopped = true; 954 r.state = ActivityState.STOPPED; 955 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 956 mStackSupervisor.requestVisibleBehindLocked(r, false); 957 } 958 if (r.finishing) { 959 r.clearOptionsLocked(); 960 } else { 961 if (r.configDestroy) { 962 destroyActivityLocked(r, true, "stop-config"); 963 mStackSupervisor.resumeTopActivitiesLocked(); 964 } else { 965 mStackSupervisor.updatePreviousProcessLocked(r); 966 } 967 } 968 } 969 } 970 971 private void completePauseLocked(boolean resumeNext) { 972 ActivityRecord prev = mPausingActivity; 973 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 974 975 if (prev != null) { 976 prev.state = ActivityState.PAUSED; 977 if (prev.finishing) { 978 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 979 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 980 } else if (prev.app != null) { 981 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 982 if (prev.waitingVisible) { 983 prev.waitingVisible = false; 984 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 985 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 986 TAG, "Complete pause, no longer waiting: " + prev); 987 } 988 if (prev.configDestroy) { 989 // The previous is being paused because the configuration 990 // is changing, which means it is actually stopping... 991 // To juggle the fact that we are also starting a new 992 // instance right now, we need to first completely stop 993 // the current instance before starting the new one. 994 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 995 destroyActivityLocked(prev, true, "pause-config"); 996 } else if (!hasVisibleBehindActivity()) { 997 // If we were visible then resumeTopActivities will release resources before 998 // stopping. 999 mStackSupervisor.mStoppingActivities.add(prev); 1000 if (mStackSupervisor.mStoppingActivities.size() > 3 || 1001 prev.frontOfTask && mTaskHistory.size() <= 1) { 1002 // If we already have a few activities waiting to stop, 1003 // then give up on things going idle and start clearing 1004 // them out. Or if r is the last of activity of the last task the stack 1005 // will be empty and must be cleared immediately. 1006 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 1007 mStackSupervisor.scheduleIdleLocked(); 1008 } else { 1009 mStackSupervisor.checkReadyForSleepLocked(); 1010 } 1011 } 1012 } else { 1013 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 1014 prev = null; 1015 } 1016 mPausingActivity = null; 1017 } 1018 1019 if (resumeNext) { 1020 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1021 if (!mService.isSleepingOrShuttingDown()) { 1022 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1023 } else { 1024 mStackSupervisor.checkReadyForSleepLocked(); 1025 ActivityRecord top = topStack.topRunningActivityLocked(null); 1026 if (top == null || (prev != null && top != prev)) { 1027 // If there are no more activities available to run, 1028 // do resume anyway to start something. Also if the top 1029 // activity on the stack is not the just paused activity, 1030 // we need to go ahead and resume it to ensure we complete 1031 // an in-flight app switch. 1032 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1033 } 1034 } 1035 } 1036 1037 if (prev != null) { 1038 prev.resumeKeyDispatchingLocked(); 1039 1040 if (prev.app != null && prev.cpuTimeAtResume > 0 1041 && mService.mBatteryStatsService.isOnBattery()) { 1042 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1043 - prev.cpuTimeAtResume; 1044 if (diff > 0) { 1045 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1046 synchronized (bsi) { 1047 BatteryStatsImpl.Uid.Proc ps = 1048 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1049 prev.info.packageName); 1050 if (ps != null) { 1051 ps.addForegroundTimeLocked(diff); 1052 } 1053 } 1054 } 1055 } 1056 prev.cpuTimeAtResume = 0; // reset it 1057 } 1058 } 1059 1060 /** 1061 * Once we know that we have asked an application to put an activity in 1062 * the resumed state (either by launching it or explicitly telling it), 1063 * this function updates the rest of our state to match that fact. 1064 */ 1065 private void completeResumeLocked(ActivityRecord next) { 1066 next.idle = false; 1067 next.results = null; 1068 next.newIntents = null; 1069 1070 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1071 ProcessRecord app = next.task.mActivities.get(0).app; 1072 if (app != null && app != mService.mHomeProcess) { 1073 mService.mHomeProcess = app; 1074 } 1075 } 1076 1077 if (next.nowVisible) { 1078 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1079 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1080 } 1081 1082 // schedule an idle timeout in case the app doesn't do it for us. 1083 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1084 1085 mStackSupervisor.reportResumedActivityLocked(next); 1086 1087 next.resumeKeyDispatchingLocked(); 1088 mNoAnimActivities.clear(); 1089 1090 // Mark the point when the activity is resuming 1091 // TODO: To be more accurate, the mark should be before the onCreate, 1092 // not after the onResume. But for subsequent starts, onResume is fine. 1093 if (next.app != null) { 1094 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1095 } else { 1096 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1097 } 1098 1099 // If we are resuming the activity that we had last screenshotted, then we know it will be 1100 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1101 if (next == mLastScreenshotActivity) { 1102 invalidateLastScreenshot(); 1103 } 1104 next.returningOptions = null; 1105 1106 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) { 1107 // When resuming an activity, require it to call requestVisibleBehind() again. 1108 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null); 1109 } 1110 } 1111 1112 private void setVisibile(ActivityRecord r, boolean visible) { 1113 r.visible = visible; 1114 mWindowManager.setAppVisibility(r.appToken, visible); 1115 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1116 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1117 ActivityContainer container = containers.get(containerNdx); 1118 container.setVisible(visible); 1119 } 1120 } 1121 1122 // Find the first visible activity above the passed activity and if it is translucent return it 1123 // otherwise return null; 1124 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1125 TaskRecord task = r.task; 1126 if (task == null) { 1127 return null; 1128 } 1129 1130 ActivityStack stack = task.stack; 1131 if (stack == null) { 1132 return null; 1133 } 1134 1135 int stackNdx = mStacks.indexOf(stack); 1136 1137 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1138 int taskNdx = tasks.indexOf(task); 1139 1140 ArrayList<ActivityRecord> activities = task.mActivities; 1141 int activityNdx = activities.indexOf(r) + 1; 1142 1143 final int numStacks = mStacks.size(); 1144 while (stackNdx < numStacks) { 1145 tasks = mStacks.get(stackNdx).mTaskHistory; 1146 final int numTasks = tasks.size(); 1147 while (taskNdx < numTasks) { 1148 activities = tasks.get(taskNdx).mActivities; 1149 final int numActivities = activities.size(); 1150 while (activityNdx < numActivities) { 1151 final ActivityRecord activity = activities.get(activityNdx); 1152 if (!activity.finishing) { 1153 return activity.fullscreen ? null : activity; 1154 } 1155 ++activityNdx; 1156 } 1157 activityNdx = 0; 1158 ++taskNdx; 1159 } 1160 taskNdx = 0; 1161 ++stackNdx; 1162 } 1163 1164 return null; 1165 } 1166 1167 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1168 // If so, this stack is hidden, otherwise it is visible. 1169 private boolean isStackVisible() { 1170 if (!isAttached()) { 1171 return false; 1172 } 1173 1174 if (mStackSupervisor.isFrontStack(this)) { 1175 return true; 1176 } 1177 1178 /** 1179 * Start at the task above this one and go up, looking for a visible 1180 * fullscreen activity, or a translucent activity that requested the 1181 * wallpaper to be shown behind it. 1182 */ 1183 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1184 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1185 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1186 final TaskRecord task = tasks.get(taskNdx); 1187 final ArrayList<ActivityRecord> activities = task.mActivities; 1188 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1189 final ActivityRecord r = activities.get(activityNdx); 1190 1191 // Conditions for an activity to obscure the stack we're 1192 // examining: 1193 // 1. Not Finishing AND Visible AND: 1194 // 2. Either: 1195 // - Full Screen Activity OR 1196 // - On top of Home and our stack is NOT home 1197 if (!r.finishing && r.visible && (r.fullscreen || 1198 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1199 return false; 1200 } 1201 } 1202 } 1203 } 1204 1205 return true; 1206 } 1207 1208 /** 1209 * Make sure that all activities that need to be visible (that is, they 1210 * currently can be seen by the user) actually are. 1211 */ 1212 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1213 ActivityRecord top = topRunningActivityLocked(null); 1214 if (top == null) { 1215 return; 1216 } 1217 if (DEBUG_VISBILITY) Slog.v( 1218 TAG, "ensureActivitiesVisible behind " + top 1219 + " configChanges=0x" + Integer.toHexString(configChanges)); 1220 1221 if (mTranslucentActivityWaiting != top) { 1222 mUndrawnActivitiesBelowTopTranslucent.clear(); 1223 if (mTranslucentActivityWaiting != null) { 1224 // Call the callback with a timeout indication. 1225 notifyActivityDrawnLocked(null); 1226 mTranslucentActivityWaiting = null; 1227 } 1228 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1229 } 1230 1231 // If the top activity is not fullscreen, then we need to 1232 // make sure any activities under it are now visible. 1233 boolean aboveTop = true; 1234 boolean behindFullscreen = !isStackVisible(); 1235 1236 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1237 final TaskRecord task = mTaskHistory.get(taskNdx); 1238 final ArrayList<ActivityRecord> activities = task.mActivities; 1239 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1240 final ActivityRecord r = activities.get(activityNdx); 1241 if (r.finishing) { 1242 continue; 1243 } 1244 if (aboveTop && r != top) { 1245 continue; 1246 } 1247 aboveTop = false; 1248 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1249 // but must be drawn initially for the animation as though they were visible. 1250 if (!behindFullscreen || r.mLaunchTaskBehind) { 1251 if (DEBUG_VISBILITY) Slog.v( 1252 TAG, "Make visible? " + r + " finishing=" + r.finishing 1253 + " state=" + r.state); 1254 1255 // First: if this is not the current activity being started, make 1256 // sure it matches the current configuration. 1257 if (r != starting) { 1258 ensureActivityConfigurationLocked(r, 0); 1259 } 1260 1261 if (r.app == null || r.app.thread == null) { 1262 // This activity needs to be visible, but isn't even 1263 // running... get it started, but don't resume it 1264 // at this point. 1265 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1266 if (r != starting) { 1267 r.startFreezingScreenLocked(r.app, configChanges); 1268 } 1269 if (!r.visible || r.mLaunchTaskBehind) { 1270 if (DEBUG_VISBILITY) Slog.v( 1271 TAG, "Starting and making visible: " + r); 1272 setVisibile(r, true); 1273 } 1274 if (r != starting) { 1275 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1276 } 1277 1278 } else if (r.visible) { 1279 // If this activity is already visible, then there is nothing 1280 // else to do here. 1281 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1282 r.stopFreezingScreenLocked(false); 1283 try { 1284 if (r.returningOptions != null) { 1285 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1286 r.returningOptions); 1287 } 1288 } catch(RemoteException e) { 1289 } 1290 } else { 1291 // This activity is not currently visible, but is running. 1292 // Tell it to become visible. 1293 r.visible = true; 1294 if (r.state != ActivityState.RESUMED && r != starting) { 1295 // If this activity is paused, tell it 1296 // to now show its window. 1297 if (DEBUG_VISBILITY) Slog.v( 1298 TAG, "Making visible and scheduling visibility: " + r); 1299 try { 1300 if (mTranslucentActivityWaiting != null) { 1301 r.updateOptionsLocked(r.returningOptions); 1302 mUndrawnActivitiesBelowTopTranslucent.add(r); 1303 } 1304 setVisibile(r, true); 1305 r.sleeping = false; 1306 r.app.pendingUiClean = true; 1307 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1308 r.stopFreezingScreenLocked(false); 1309 } catch (Exception e) { 1310 // Just skip on any failure; we'll make it 1311 // visible when it next restarts. 1312 Slog.w(TAG, "Exception thrown making visibile: " 1313 + r.intent.getComponent(), e); 1314 } 1315 } 1316 } 1317 1318 // Aggregate current change flags. 1319 configChanges |= r.configChangeFlags; 1320 1321 if (r.fullscreen) { 1322 // At this point, nothing else needs to be shown 1323 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1324 behindFullscreen = true; 1325 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1326 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1327 behindFullscreen = true; 1328 } 1329 } else { 1330 if (DEBUG_VISBILITY) Slog.v( 1331 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1332 + " state=" + r.state 1333 + " behindFullscreen=" + behindFullscreen); 1334 // Now for any activities that aren't visible to the user, make 1335 // sure they no longer are keeping the screen frozen. 1336 if (r.visible) { 1337 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1338 try { 1339 setVisibile(r, false); 1340 switch (r.state) { 1341 case STOPPING: 1342 case STOPPED: 1343 if (r.app != null && r.app.thread != null) { 1344 if (DEBUG_VISBILITY) Slog.v( 1345 TAG, "Scheduling invisibility: " + r); 1346 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1347 } 1348 break; 1349 1350 case INITIALIZING: 1351 case RESUMED: 1352 case PAUSING: 1353 case PAUSED: 1354 // This case created for transitioning activities from 1355 // translucent to opaque {@link Activity#convertToOpaque}. 1356 if (getVisibleBehindActivity() == r) { 1357 releaseBackgroundResources(); 1358 } else { 1359 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1360 mStackSupervisor.mStoppingActivities.add(r); 1361 } 1362 mStackSupervisor.scheduleIdleLocked(); 1363 } 1364 break; 1365 1366 default: 1367 break; 1368 } 1369 } catch (Exception e) { 1370 // Just skip on any failure; we'll make it 1371 // visible when it next restarts. 1372 Slog.w(TAG, "Exception thrown making hidden: " 1373 + r.intent.getComponent(), e); 1374 } 1375 } else { 1376 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1377 } 1378 } 1379 } 1380 } 1381 1382 if (mTranslucentActivityWaiting != null && 1383 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1384 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1385 notifyActivityDrawnLocked(null); 1386 } 1387 } 1388 1389 void convertToTranslucent(ActivityRecord r) { 1390 mTranslucentActivityWaiting = r; 1391 mUndrawnActivitiesBelowTopTranslucent.clear(); 1392 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1393 } 1394 1395 /** 1396 * Called as activities below the top translucent activity are redrawn. When the last one is 1397 * redrawn notify the top activity by calling 1398 * {@link Activity#onTranslucentConversionComplete}. 1399 * 1400 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1401 * occurred and the activity will be notified immediately. 1402 */ 1403 void notifyActivityDrawnLocked(ActivityRecord r) { 1404 mActivityContainer.setDrawn(); 1405 if ((r == null) 1406 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1407 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1408 // The last undrawn activity below the top has just been drawn. If there is an 1409 // opaque activity at the top, notify it that it can become translucent safely now. 1410 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1411 mTranslucentActivityWaiting = null; 1412 mUndrawnActivitiesBelowTopTranslucent.clear(); 1413 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1414 1415 if (waitingActivity != null) { 1416 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1417 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1418 try { 1419 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1420 waitingActivity.appToken, r != null); 1421 } catch (RemoteException e) { 1422 } 1423 } 1424 } 1425 } 1426 } 1427 1428 /** If any activities below the top running one are in the INITIALIZING state and they have a 1429 * starting window displayed then remove that starting window. It is possible that the activity 1430 * in this state will never resumed in which case that starting window will be orphaned. */ 1431 void cancelInitializingActivities() { 1432 final ActivityRecord topActivity = topRunningActivityLocked(null); 1433 boolean aboveTop = true; 1434 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1435 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1436 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1437 final ActivityRecord r = activities.get(activityNdx); 1438 if (aboveTop) { 1439 if (r == topActivity) { 1440 aboveTop = false; 1441 } 1442 continue; 1443 } 1444 1445 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1446 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1447 r.mStartingWindowShown = false; 1448 mWindowManager.removeAppStartingWindow(r.appToken); 1449 } 1450 } 1451 } 1452 } 1453 1454 /** 1455 * Ensure that the top activity in the stack is resumed. 1456 * 1457 * @param prev The previously resumed activity, for when in the process 1458 * of pausing; can be null to call from elsewhere. 1459 * 1460 * @return Returns true if something is being resumed, or false if 1461 * nothing happened. 1462 */ 1463 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1464 return resumeTopActivityLocked(prev, null); 1465 } 1466 1467 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1468 if (mStackSupervisor.inResumeTopActivity) { 1469 // Don't even start recursing. 1470 return false; 1471 } 1472 1473 boolean result = false; 1474 try { 1475 // Protect against recursion. 1476 mStackSupervisor.inResumeTopActivity = true; 1477 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 1478 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 1479 mService.comeOutOfSleepIfNeededLocked(); 1480 } 1481 result = resumeTopActivityInnerLocked(prev, options); 1482 } finally { 1483 mStackSupervisor.inResumeTopActivity = false; 1484 } 1485 return result; 1486 } 1487 1488 final boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) { 1489 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1490 1491 if (!mService.mBooting && !mService.mBooted) { 1492 // Not ready yet! 1493 return false; 1494 } 1495 1496 ActivityRecord parent = mActivityContainer.mParentActivity; 1497 if ((parent != null && parent.state != ActivityState.RESUMED) || 1498 !mActivityContainer.isAttachedLocked()) { 1499 // Do not resume this stack if its parent is not resumed. 1500 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1501 return false; 1502 } 1503 1504 cancelInitializingActivities(); 1505 1506 // Find the first activity that is not finishing. 1507 ActivityRecord next = topRunningActivityLocked(null); 1508 1509 // Remember how we'll process this pause/resume situation, and ensure 1510 // that the state is reset however we wind up proceeding. 1511 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1512 mStackSupervisor.mUserLeaving = false; 1513 1514 final TaskRecord prevTask = prev != null ? prev.task : null; 1515 if (next == null) { 1516 // There are no more activities! Let's just start up the 1517 // Launcher... 1518 ActivityOptions.abort(options); 1519 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1520 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1521 // Only resume home if on home display 1522 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1523 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1524 return isOnHomeDisplay() && 1525 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1526 } 1527 1528 next.delayedResume = false; 1529 1530 // If the top activity is the resumed one, nothing to do. 1531 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1532 mStackSupervisor.allResumedActivitiesComplete()) { 1533 // Make sure we have executed any pending transitions, since there 1534 // should be nothing left to do at this point. 1535 mWindowManager.executeAppTransition(); 1536 mNoAnimActivities.clear(); 1537 ActivityOptions.abort(options); 1538 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1539 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1540 1541 // Make sure to notify Keyguard as well if it is waiting for an activity to be drawn. 1542 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1543 return false; 1544 } 1545 1546 final TaskRecord nextTask = next.task; 1547 if (prevTask != null && prevTask.stack == this && 1548 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1549 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1550 if (prevTask == nextTask) { 1551 prevTask.setFrontOfTask(); 1552 } else if (prevTask != topTask()) { 1553 // This task is going away but it was supposed to return to the home stack. 1554 // Now the task above it has to return to the home task instead. 1555 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1556 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1557 } else { 1558 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1559 "resumeTopActivityLocked: Launching home next"); 1560 // Only resume home if on home display 1561 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1562 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1563 return isOnHomeDisplay() && 1564 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1565 } 1566 } 1567 1568 // If we are sleeping, and there is no resumed activity, and the top 1569 // activity is paused, well that is the state we want. 1570 if (mService.isSleepingOrShuttingDown() 1571 && mLastPausedActivity == next 1572 && mStackSupervisor.allPausedActivitiesComplete()) { 1573 // Make sure we have executed any pending transitions, since there 1574 // should be nothing left to do at this point. 1575 mWindowManager.executeAppTransition(); 1576 mNoAnimActivities.clear(); 1577 ActivityOptions.abort(options); 1578 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1579 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1580 return false; 1581 } 1582 1583 // Make sure that the user who owns this activity is started. If not, 1584 // we will just leave it as is because someone should be bringing 1585 // another user's activities to the top of the stack. 1586 if (mService.mStartedUsers.get(next.userId) == null) { 1587 Slog.w(TAG, "Skipping resume of top activity " + next 1588 + ": user " + next.userId + " is stopped"); 1589 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1590 return false; 1591 } 1592 1593 // The activity may be waiting for stop, but that is no longer 1594 // appropriate for it. 1595 mStackSupervisor.mStoppingActivities.remove(next); 1596 mStackSupervisor.mGoingToSleepActivities.remove(next); 1597 next.sleeping = false; 1598 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1599 1600 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1601 1602 // If we are currently pausing an activity, then don't do anything 1603 // until that is done. 1604 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1605 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1606 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1607 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1608 return false; 1609 } 1610 1611 // Okay we are now going to start a switch, to 'next'. We may first 1612 // have to pause the current activity, but this is an important point 1613 // where we have decided to go to 'next' so keep track of that. 1614 // XXX "App Redirected" dialog is getting too many false positives 1615 // at this point, so turn off for now. 1616 if (false) { 1617 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1618 long now = SystemClock.uptimeMillis(); 1619 final boolean inTime = mLastStartedActivity.startTime != 0 1620 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1621 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1622 final int nextUid = next.info.applicationInfo.uid; 1623 if (inTime && lastUid != nextUid 1624 && lastUid != next.launchedFromUid 1625 && mService.checkPermission( 1626 android.Manifest.permission.STOP_APP_SWITCHES, 1627 -1, next.launchedFromUid) 1628 != PackageManager.PERMISSION_GRANTED) { 1629 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1630 } else { 1631 next.startTime = now; 1632 mLastStartedActivity = next; 1633 } 1634 } else { 1635 next.startTime = SystemClock.uptimeMillis(); 1636 mLastStartedActivity = next; 1637 } 1638 } 1639 1640 // We need to start pausing the current activity so the top one 1641 // can be resumed... 1642 boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0; 1643 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 1644 if (mResumedActivity != null) { 1645 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1646 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 1647 } 1648 if (pausing) { 1649 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1650 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1651 // At this point we want to put the upcoming activity's process 1652 // at the top of the LRU list, since we know we will be needing it 1653 // very soon and it would be a waste to let it get killed if it 1654 // happens to be sitting towards the end. 1655 if (next.app != null && next.app.thread != null) { 1656 mService.updateLruProcessLocked(next.app, true, null); 1657 } 1658 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1659 return true; 1660 } 1661 1662 // If the most recent activity was noHistory but was only stopped rather 1663 // than stopped+finished because the device went to sleep, we need to make 1664 // sure to finish it as we're making a new activity topmost. 1665 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1666 !mLastNoHistoryActivity.finishing) { 1667 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1668 " on new resume"); 1669 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1670 null, "no-history", false); 1671 mLastNoHistoryActivity = null; 1672 } 1673 1674 if (prev != null && prev != next) { 1675 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1676 prev.waitingVisible = true; 1677 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1678 if (DEBUG_SWITCH) Slog.v( 1679 TAG, "Resuming top, waiting visible to hide: " + prev); 1680 } else { 1681 // The next activity is already visible, so hide the previous 1682 // activity's windows right now so we can show the new one ASAP. 1683 // We only do this if the previous is finishing, which should mean 1684 // it is on top of the one being resumed so hiding it quickly 1685 // is good. Otherwise, we want to do the normal route of allowing 1686 // the resumed activity to be shown so we can decide if the 1687 // previous should actually be hidden depending on whether the 1688 // new one is found to be full-screen or not. 1689 if (prev.finishing) { 1690 mWindowManager.setAppVisibility(prev.appToken, false); 1691 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1692 + prev + ", waitingVisible=" 1693 + (prev != null ? prev.waitingVisible : null) 1694 + ", nowVisible=" + next.nowVisible); 1695 } else { 1696 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1697 + prev + ", waitingVisible=" 1698 + (prev != null ? prev.waitingVisible : null) 1699 + ", nowVisible=" + next.nowVisible); 1700 } 1701 } 1702 } 1703 1704 // Launching this app's activity, make sure the app is no longer 1705 // considered stopped. 1706 try { 1707 AppGlobals.getPackageManager().setPackageStoppedState( 1708 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1709 } catch (RemoteException e1) { 1710 } catch (IllegalArgumentException e) { 1711 Slog.w(TAG, "Failed trying to unstop package " 1712 + next.packageName + ": " + e); 1713 } 1714 1715 // We are starting up the next activity, so tell the window manager 1716 // that the previous one will be hidden soon. This way it can know 1717 // to ignore it when computing the desired screen orientation. 1718 boolean anim = true; 1719 if (prev != null) { 1720 if (prev.finishing) { 1721 if (DEBUG_TRANSITION) Slog.v(TAG, 1722 "Prepare close transition: prev=" + prev); 1723 if (mNoAnimActivities.contains(prev)) { 1724 anim = false; 1725 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1726 } else { 1727 mWindowManager.prepareAppTransition(prev.task == next.task 1728 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1729 : AppTransition.TRANSIT_TASK_CLOSE, false); 1730 } 1731 mWindowManager.setAppWillBeHidden(prev.appToken); 1732 mWindowManager.setAppVisibility(prev.appToken, false); 1733 } else { 1734 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1735 if (mNoAnimActivities.contains(next)) { 1736 anim = false; 1737 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1738 } else { 1739 mWindowManager.prepareAppTransition(prev.task == next.task 1740 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1741 : next.mLaunchTaskBehind 1742 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1743 : AppTransition.TRANSIT_TASK_OPEN, false); 1744 } 1745 } 1746 if (false) { 1747 mWindowManager.setAppWillBeHidden(prev.appToken); 1748 mWindowManager.setAppVisibility(prev.appToken, false); 1749 } 1750 } else { 1751 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1752 if (mNoAnimActivities.contains(next)) { 1753 anim = false; 1754 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1755 } else { 1756 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1757 } 1758 } 1759 1760 Bundle resumeAnimOptions = null; 1761 if (anim) { 1762 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1763 if (opts != null) { 1764 resumeAnimOptions = opts.toBundle(); 1765 } 1766 next.applyOptionsLocked(); 1767 } else { 1768 next.clearOptionsLocked(); 1769 } 1770 1771 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1772 if (next.app != null && next.app.thread != null) { 1773 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1774 1775 // This activity is now becoming visible. 1776 mWindowManager.setAppVisibility(next.appToken, true); 1777 1778 // schedule launch ticks to collect information about slow apps. 1779 next.startLaunchTickingLocked(); 1780 1781 ActivityRecord lastResumedActivity = 1782 lastStack == null ? null :lastStack.mResumedActivity; 1783 ActivityState lastState = next.state; 1784 1785 mService.updateCpuStats(); 1786 1787 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1788 next.state = ActivityState.RESUMED; 1789 mResumedActivity = next; 1790 next.task.touchActiveTime(); 1791 mService.addRecentTaskLocked(next.task); 1792 mService.updateLruProcessLocked(next.app, true, null); 1793 updateLRUListLocked(next); 1794 mService.updateOomAdjLocked(); 1795 1796 // Have the window manager re-evaluate the orientation of 1797 // the screen based on the new activity order. 1798 boolean notUpdated = true; 1799 if (mStackSupervisor.isFrontStack(this)) { 1800 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1801 mService.mConfiguration, 1802 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1803 if (config != null) { 1804 next.frozenBeforeDestroy = true; 1805 } 1806 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1807 } 1808 1809 if (notUpdated) { 1810 // The configuration update wasn't able to keep the existing 1811 // instance of the activity, and instead started a new one. 1812 // We should be all done, but let's just make sure our activity 1813 // is still at the top and schedule another run if something 1814 // weird happened. 1815 ActivityRecord nextNext = topRunningActivityLocked(null); 1816 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1817 "Activity config changed during resume: " + next 1818 + ", new next: " + nextNext); 1819 if (nextNext != next) { 1820 // Do over! 1821 mStackSupervisor.scheduleResumeTopActivities(); 1822 } 1823 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1824 mNoAnimActivities.clear(); 1825 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1826 return true; 1827 } 1828 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1829 return false; 1830 } 1831 1832 try { 1833 // Deliver all pending results. 1834 ArrayList<ResultInfo> a = next.results; 1835 if (a != null) { 1836 final int N = a.size(); 1837 if (!next.finishing && N > 0) { 1838 if (DEBUG_RESULTS) Slog.v( 1839 TAG, "Delivering results to " + next 1840 + ": " + a); 1841 next.app.thread.scheduleSendResult(next.appToken, a); 1842 } 1843 } 1844 1845 if (next.newIntents != null) { 1846 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1847 } 1848 1849 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1850 next.userId, System.identityHashCode(next), 1851 next.task.taskId, next.shortComponentName); 1852 1853 next.sleeping = false; 1854 mService.showAskCompatModeDialogLocked(next); 1855 next.app.pendingUiClean = true; 1856 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1857 next.clearOptionsLocked(); 1858 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1859 mService.isNextTransitionForward(), resumeAnimOptions); 1860 1861 mStackSupervisor.checkReadyForSleepLocked(); 1862 1863 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1864 } catch (Exception e) { 1865 // Whoops, need to restart this activity! 1866 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1867 + lastState + ": " + next); 1868 next.state = lastState; 1869 if (lastStack != null) { 1870 lastStack.mResumedActivity = lastResumedActivity; 1871 } 1872 Slog.i(TAG, "Restarting because process died: " + next); 1873 if (!next.hasBeenLaunched) { 1874 next.hasBeenLaunched = true; 1875 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1876 mStackSupervisor.isFrontStack(lastStack)) { 1877 mWindowManager.setAppStartingWindow( 1878 next.appToken, next.packageName, next.theme, 1879 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1880 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1881 next.windowFlags, null, true); 1882 } 1883 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1884 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1885 return true; 1886 } 1887 1888 // From this point on, if something goes wrong there is no way 1889 // to recover the activity. 1890 try { 1891 next.visible = true; 1892 completeResumeLocked(next); 1893 } catch (Exception e) { 1894 // If any exception gets thrown, toss away this 1895 // activity and try the next one. 1896 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1897 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1898 "resume-exception", true); 1899 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1900 return true; 1901 } 1902 next.stopped = false; 1903 1904 } else { 1905 // Whoops, need to restart this activity! 1906 if (!next.hasBeenLaunched) { 1907 next.hasBeenLaunched = true; 1908 } else { 1909 if (SHOW_APP_STARTING_PREVIEW) { 1910 mWindowManager.setAppStartingWindow( 1911 next.appToken, next.packageName, next.theme, 1912 mService.compatibilityInfoForPackageLocked( 1913 next.info.applicationInfo), 1914 next.nonLocalizedLabel, 1915 next.labelRes, next.icon, next.logo, next.windowFlags, 1916 null, true); 1917 } 1918 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1919 } 1920 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1921 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1922 } 1923 1924 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1925 return true; 1926 } 1927 1928 private void insertTaskAtTop(TaskRecord task) { 1929 // If this is being moved to the top by another activity or being launched from the home 1930 // activity, set mOnTopOfHome accordingly. 1931 if (isOnHomeDisplay()) { 1932 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1933 final boolean fromHome = lastStack.isHomeStack(); 1934 if (!isHomeStack() && (fromHome || topTask() != task)) { 1935 task.setTaskToReturnTo(fromHome 1936 ? lastStack.topTask() == null 1937 ? HOME_ACTIVITY_TYPE 1938 : lastStack.topTask().taskType 1939 : APPLICATION_ACTIVITY_TYPE); 1940 } 1941 } else { 1942 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1943 } 1944 1945 mTaskHistory.remove(task); 1946 // Now put task at top. 1947 int taskNdx = mTaskHistory.size(); 1948 if (!isCurrentProfileLocked(task.userId)) { 1949 // Put non-current user tasks below current user tasks. 1950 while (--taskNdx >= 0) { 1951 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1952 break; 1953 } 1954 } 1955 ++taskNdx; 1956 } 1957 mTaskHistory.add(taskNdx, task); 1958 updateTaskMovement(task, true); 1959 } 1960 1961 final void startActivityLocked(ActivityRecord r, boolean newTask, 1962 boolean doResume, boolean keepCurTransition, Bundle options) { 1963 TaskRecord rTask = r.task; 1964 final int taskId = rTask.taskId; 1965 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1966 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1967 // Last activity in task had been removed or ActivityManagerService is reusing task. 1968 // Insert or replace. 1969 // Might not even be in. 1970 insertTaskAtTop(rTask); 1971 mWindowManager.moveTaskToTop(taskId); 1972 } 1973 TaskRecord task = null; 1974 if (!newTask) { 1975 // If starting in an existing task, find where that is... 1976 boolean startIt = true; 1977 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1978 task = mTaskHistory.get(taskNdx); 1979 if (task.getTopActivity() == null) { 1980 // All activities in task are finishing. 1981 continue; 1982 } 1983 if (task == r.task) { 1984 // Here it is! Now, if this is not yet visible to the 1985 // user, then just add it without starting; it will 1986 // get started when the user navigates back to it. 1987 if (!startIt) { 1988 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1989 + task, new RuntimeException("here").fillInStackTrace()); 1990 task.addActivityToTop(r); 1991 r.putInHistory(); 1992 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1993 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1994 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1995 r.userId, r.info.configChanges, task.voiceSession != null, 1996 r.mLaunchTaskBehind); 1997 if (VALIDATE_TOKENS) { 1998 validateAppTokensLocked(); 1999 } 2000 ActivityOptions.abort(options); 2001 return; 2002 } 2003 break; 2004 } else if (task.numFullscreen > 0) { 2005 startIt = false; 2006 } 2007 } 2008 } 2009 2010 // Place a new activity at top of stack, so it is next to interact 2011 // with the user. 2012 2013 // If we are not placing the new activity frontmost, we do not want 2014 // to deliver the onUserLeaving callback to the actual frontmost 2015 // activity 2016 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2017 mStackSupervisor.mUserLeaving = false; 2018 if (DEBUG_USER_LEAVING) Slog.v(TAG, 2019 "startActivity() behind front, mUserLeaving=false"); 2020 } 2021 2022 task = r.task; 2023 2024 // Slot the activity into the history stack and proceed 2025 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2026 new RuntimeException("here").fillInStackTrace()); 2027 task.addActivityToTop(r); 2028 task.setFrontOfTask(); 2029 2030 r.putInHistory(); 2031 if (!isHomeStack() || numActivities() > 0) { 2032 // We want to show the starting preview window if we are 2033 // switching to a new task, or the next activity's process is 2034 // not currently running. 2035 boolean showStartingIcon = newTask; 2036 ProcessRecord proc = r.app; 2037 if (proc == null) { 2038 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2039 } 2040 if (proc == null || proc.thread == null) { 2041 showStartingIcon = true; 2042 } 2043 if (DEBUG_TRANSITION) Slog.v(TAG, 2044 "Prepare open transition: starting " + r); 2045 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2046 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2047 mNoAnimActivities.add(r); 2048 } else { 2049 mWindowManager.prepareAppTransition(newTask 2050 ? r.mLaunchTaskBehind 2051 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2052 : AppTransition.TRANSIT_TASK_OPEN 2053 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2054 mNoAnimActivities.remove(r); 2055 } 2056 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2057 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2058 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2059 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2060 boolean doShow = true; 2061 if (newTask) { 2062 // Even though this activity is starting fresh, we still need 2063 // to reset it to make sure we apply affinities to move any 2064 // existing activities from other tasks in to it. 2065 // If the caller has requested that the target task be 2066 // reset, then do so. 2067 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2068 resetTaskIfNeededLocked(r, r); 2069 doShow = topRunningNonDelayedActivityLocked(null) == r; 2070 } 2071 } else if (options != null && new ActivityOptions(options).getAnimationType() 2072 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2073 doShow = false; 2074 } 2075 if (r.mLaunchTaskBehind) { 2076 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2077 // tell WindowManager that r is visible even though it is at the back of the stack. 2078 mWindowManager.setAppVisibility(r.appToken, true); 2079 ensureActivitiesVisibleLocked(null, 0); 2080 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2081 // Figure out if we are transitioning from another activity that is 2082 // "has the same starting icon" as the next one. This allows the 2083 // window manager to keep the previous window it had previously 2084 // created, if it still had one. 2085 ActivityRecord prev = mResumedActivity; 2086 if (prev != null) { 2087 // We don't want to reuse the previous starting preview if: 2088 // (1) The current activity is in a different task. 2089 if (prev.task != r.task) { 2090 prev = null; 2091 } 2092 // (2) The current activity is already displayed. 2093 else if (prev.nowVisible) { 2094 prev = null; 2095 } 2096 } 2097 mWindowManager.setAppStartingWindow( 2098 r.appToken, r.packageName, r.theme, 2099 mService.compatibilityInfoForPackageLocked( 2100 r.info.applicationInfo), r.nonLocalizedLabel, 2101 r.labelRes, r.icon, r.logo, r.windowFlags, 2102 prev != null ? prev.appToken : null, showStartingIcon); 2103 r.mStartingWindowShown = true; 2104 } 2105 } else { 2106 // If this is the first activity, don't do any fancy animations, 2107 // because there is nothing for it to animate on top of. 2108 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2109 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2110 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2111 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2112 ActivityOptions.abort(options); 2113 options = null; 2114 } 2115 if (VALIDATE_TOKENS) { 2116 validateAppTokensLocked(); 2117 } 2118 2119 if (doResume) { 2120 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2121 } 2122 } 2123 2124 final void validateAppTokensLocked() { 2125 mValidateAppTokens.clear(); 2126 mValidateAppTokens.ensureCapacity(numActivities()); 2127 final int numTasks = mTaskHistory.size(); 2128 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2129 TaskRecord task = mTaskHistory.get(taskNdx); 2130 final ArrayList<ActivityRecord> activities = task.mActivities; 2131 if (activities.isEmpty()) { 2132 continue; 2133 } 2134 TaskGroup group = new TaskGroup(); 2135 group.taskId = task.taskId; 2136 mValidateAppTokens.add(group); 2137 final int numActivities = activities.size(); 2138 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2139 final ActivityRecord r = activities.get(activityNdx); 2140 group.tokens.add(r.appToken); 2141 } 2142 } 2143 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2144 } 2145 2146 /** 2147 * Perform a reset of the given task, if needed as part of launching it. 2148 * Returns the new HistoryRecord at the top of the task. 2149 */ 2150 /** 2151 * Helper method for #resetTaskIfNeededLocked. 2152 * We are inside of the task being reset... we'll either finish this activity, push it out 2153 * for another task, or leave it as-is. 2154 * @param task The task containing the Activity (taskTop) that might be reset. 2155 * @param forceReset 2156 * @return An ActivityOptions that needs to be processed. 2157 */ 2158 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2159 ActivityOptions topOptions = null; 2160 2161 int replyChainEnd = -1; 2162 boolean canMoveOptions = true; 2163 2164 // We only do this for activities that are not the root of the task (since if we finish 2165 // the root, we may no longer have the task!). 2166 final ArrayList<ActivityRecord> activities = task.mActivities; 2167 final int numActivities = activities.size(); 2168 final int rootActivityNdx = task.findEffectiveRootIndex(); 2169 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2170 ActivityRecord target = activities.get(i); 2171 if (target.frontOfTask) 2172 break; 2173 2174 final int flags = target.info.flags; 2175 final boolean finishOnTaskLaunch = 2176 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2177 final boolean allowTaskReparenting = 2178 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2179 final boolean clearWhenTaskReset = 2180 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2181 2182 if (!finishOnTaskLaunch 2183 && !clearWhenTaskReset 2184 && target.resultTo != null) { 2185 // If this activity is sending a reply to a previous 2186 // activity, we can't do anything with it now until 2187 // we reach the start of the reply chain. 2188 // XXX note that we are assuming the result is always 2189 // to the previous activity, which is almost always 2190 // the case but we really shouldn't count on. 2191 if (replyChainEnd < 0) { 2192 replyChainEnd = i; 2193 } 2194 } else if (!finishOnTaskLaunch 2195 && !clearWhenTaskReset 2196 && allowTaskReparenting 2197 && target.taskAffinity != null 2198 && !target.taskAffinity.equals(task.affinity)) { 2199 // If this activity has an affinity for another 2200 // task, then we need to move it out of here. We will 2201 // move it as far out of the way as possible, to the 2202 // bottom of the activity stack. This also keeps it 2203 // correctly ordered with any activities we previously 2204 // moved. 2205 final TaskRecord targetTask; 2206 final ActivityRecord bottom = 2207 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2208 mTaskHistory.get(0).mActivities.get(0) : null; 2209 if (bottom != null && target.taskAffinity != null 2210 && target.taskAffinity.equals(bottom.task.affinity)) { 2211 // If the activity currently at the bottom has the 2212 // same task affinity as the one we are moving, 2213 // then merge it into the same task. 2214 targetTask = bottom.task; 2215 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2216 + " out to bottom task " + bottom.task); 2217 } else { 2218 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2219 null, null, null, false); 2220 targetTask.affinityIntent = target.intent; 2221 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2222 + " out to new task " + target.task); 2223 } 2224 2225 final int targetTaskId = targetTask.taskId; 2226 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2227 2228 boolean noOptions = canMoveOptions; 2229 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2230 for (int srcPos = start; srcPos >= i; --srcPos) { 2231 final ActivityRecord p = activities.get(srcPos); 2232 if (p.finishing) { 2233 continue; 2234 } 2235 2236 canMoveOptions = false; 2237 if (noOptions && topOptions == null) { 2238 topOptions = p.takeOptionsLocked(); 2239 if (topOptions != null) { 2240 noOptions = false; 2241 } 2242 } 2243 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2244 + task + " adding to task=" + targetTask 2245 + " Callers=" + Debug.getCallers(4)); 2246 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2247 + " out to target's task " + target.task); 2248 p.setTask(targetTask, null); 2249 targetTask.addActivityAtBottom(p); 2250 2251 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2252 } 2253 2254 mWindowManager.moveTaskToBottom(targetTaskId); 2255 if (VALIDATE_TOKENS) { 2256 validateAppTokensLocked(); 2257 } 2258 2259 replyChainEnd = -1; 2260 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2261 // If the activity should just be removed -- either 2262 // because it asks for it, or the task should be 2263 // cleared -- then finish it and anything that is 2264 // part of its reply chain. 2265 int end; 2266 if (clearWhenTaskReset) { 2267 // In this case, we want to finish this activity 2268 // and everything above it, so be sneaky and pretend 2269 // like these are all in the reply chain. 2270 end = numActivities - 1; 2271 } else if (replyChainEnd < 0) { 2272 end = i; 2273 } else { 2274 end = replyChainEnd; 2275 } 2276 boolean noOptions = canMoveOptions; 2277 for (int srcPos = i; srcPos <= end; srcPos++) { 2278 ActivityRecord p = activities.get(srcPos); 2279 if (p.finishing) { 2280 continue; 2281 } 2282 canMoveOptions = false; 2283 if (noOptions && topOptions == null) { 2284 topOptions = p.takeOptionsLocked(); 2285 if (topOptions != null) { 2286 noOptions = false; 2287 } 2288 } 2289 if (DEBUG_TASKS) Slog.w(TAG, 2290 "resetTaskIntendedTask: calling finishActivity on " + p); 2291 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2292 end--; 2293 srcPos--; 2294 } 2295 } 2296 replyChainEnd = -1; 2297 } else { 2298 // If we were in the middle of a chain, well the 2299 // activity that started it all doesn't want anything 2300 // special, so leave it all as-is. 2301 replyChainEnd = -1; 2302 } 2303 } 2304 2305 return topOptions; 2306 } 2307 2308 /** 2309 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2310 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2311 * @param affinityTask The task we are looking for an affinity to. 2312 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2313 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2314 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2315 */ 2316 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2317 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2318 int replyChainEnd = -1; 2319 final int taskId = task.taskId; 2320 final String taskAffinity = task.affinity; 2321 2322 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2323 final int numActivities = activities.size(); 2324 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2325 2326 // Do not operate on or below the effective root Activity. 2327 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2328 ActivityRecord target = activities.get(i); 2329 if (target.frontOfTask) 2330 break; 2331 2332 final int flags = target.info.flags; 2333 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2334 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2335 2336 if (target.resultTo != null) { 2337 // If this activity is sending a reply to a previous 2338 // activity, we can't do anything with it now until 2339 // we reach the start of the reply chain. 2340 // XXX note that we are assuming the result is always 2341 // to the previous activity, which is almost always 2342 // the case but we really shouldn't count on. 2343 if (replyChainEnd < 0) { 2344 replyChainEnd = i; 2345 } 2346 } else if (topTaskIsHigher 2347 && allowTaskReparenting 2348 && taskAffinity != null 2349 && taskAffinity.equals(target.taskAffinity)) { 2350 // This activity has an affinity for our task. Either remove it if we are 2351 // clearing or move it over to our task. Note that 2352 // we currently punt on the case where we are resetting a 2353 // task that is not at the top but who has activities above 2354 // with an affinity to it... this is really not a normal 2355 // case, and we will need to later pull that task to the front 2356 // and usually at that point we will do the reset and pick 2357 // up those remaining activities. (This only happens if 2358 // someone starts an activity in a new task from an activity 2359 // in a task that is not currently on top.) 2360 if (forceReset || finishOnTaskLaunch) { 2361 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2362 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2363 for (int srcPos = start; srcPos >= i; --srcPos) { 2364 final ActivityRecord p = activities.get(srcPos); 2365 if (p.finishing) { 2366 continue; 2367 } 2368 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2369 } 2370 } else { 2371 if (taskInsertionPoint < 0) { 2372 taskInsertionPoint = task.mActivities.size(); 2373 2374 } 2375 2376 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2377 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2378 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2379 for (int srcPos = start; srcPos >= i; --srcPos) { 2380 final ActivityRecord p = activities.get(srcPos); 2381 p.setTask(task, null); 2382 task.addActivityAtIndex(taskInsertionPoint, p); 2383 2384 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2385 + " to stack at " + task, 2386 new RuntimeException("here").fillInStackTrace()); 2387 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2388 + " in to resetting task " + task); 2389 mWindowManager.setAppGroupId(p.appToken, taskId); 2390 } 2391 mWindowManager.moveTaskToTop(taskId); 2392 if (VALIDATE_TOKENS) { 2393 validateAppTokensLocked(); 2394 } 2395 2396 // Now we've moved it in to place... but what if this is 2397 // a singleTop activity and we have put it on top of another 2398 // instance of the same activity? Then we drop the instance 2399 // below so it remains singleTop. 2400 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2401 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2402 int targetNdx = taskActivities.indexOf(target); 2403 if (targetNdx > 0) { 2404 ActivityRecord p = taskActivities.get(targetNdx - 1); 2405 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2406 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2407 false); 2408 } 2409 } 2410 } 2411 } 2412 2413 replyChainEnd = -1; 2414 } 2415 } 2416 return taskInsertionPoint; 2417 } 2418 2419 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2420 ActivityRecord newActivity) { 2421 boolean forceReset = 2422 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2423 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2424 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2425 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2426 forceReset = true; 2427 } 2428 } 2429 2430 final TaskRecord task = taskTop.task; 2431 2432 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2433 * for remaining tasks. Used for later tasks to reparent to task. */ 2434 boolean taskFound = false; 2435 2436 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2437 ActivityOptions topOptions = null; 2438 2439 // Preserve the location for reparenting in the new task. 2440 int reparentInsertionPoint = -1; 2441 2442 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2443 final TaskRecord targetTask = mTaskHistory.get(i); 2444 2445 if (targetTask == task) { 2446 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2447 taskFound = true; 2448 } else { 2449 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2450 taskFound, forceReset, reparentInsertionPoint); 2451 } 2452 } 2453 2454 int taskNdx = mTaskHistory.indexOf(task); 2455 do { 2456 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2457 } while (taskTop == null && taskNdx >= 0); 2458 2459 if (topOptions != null) { 2460 // If we got some ActivityOptions from an activity on top that 2461 // was removed from the task, propagate them to the new real top. 2462 if (taskTop != null) { 2463 taskTop.updateOptionsLocked(topOptions); 2464 } else { 2465 topOptions.abort(); 2466 } 2467 } 2468 2469 return taskTop; 2470 } 2471 2472 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2473 String resultWho, int requestCode, int resultCode, Intent data) { 2474 2475 if (callingUid > 0) { 2476 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2477 data, r.getUriPermissionsLocked(), r.userId); 2478 } 2479 2480 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2481 + " : who=" + resultWho + " req=" + requestCode 2482 + " res=" + resultCode + " data=" + data); 2483 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2484 try { 2485 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2486 list.add(new ResultInfo(resultWho, requestCode, 2487 resultCode, data)); 2488 r.app.thread.scheduleSendResult(r.appToken, list); 2489 return; 2490 } catch (Exception e) { 2491 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2492 } 2493 } 2494 2495 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2496 } 2497 2498 private void adjustFocusedActivityLocked(ActivityRecord r) { 2499 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2500 ActivityRecord next = topRunningActivityLocked(null); 2501 if (next != r) { 2502 final TaskRecord task = r.task; 2503 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2504 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2505 } 2506 } 2507 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2508 if (top != null) { 2509 mService.setFocusedActivityLocked(top); 2510 } 2511 } 2512 } 2513 2514 final void stopActivityLocked(ActivityRecord r) { 2515 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2516 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2517 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2518 if (!r.finishing) { 2519 if (!mService.isSleeping()) { 2520 if (DEBUG_STATES) { 2521 Slog.d(TAG, "no-history finish of " + r); 2522 } 2523 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2524 "no-history", false); 2525 } else { 2526 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2527 + " on stop because we're just sleeping"); 2528 } 2529 } 2530 } 2531 2532 if (r.app != null && r.app.thread != null) { 2533 adjustFocusedActivityLocked(r); 2534 r.resumeKeyDispatchingLocked(); 2535 try { 2536 r.stopped = false; 2537 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2538 + " (stop requested)"); 2539 r.state = ActivityState.STOPPING; 2540 if (DEBUG_VISBILITY) Slog.v( 2541 TAG, "Stopping visible=" + r.visible + " for " + r); 2542 if (!r.visible) { 2543 mWindowManager.setAppVisibility(r.appToken, false); 2544 } 2545 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2546 if (mService.isSleepingOrShuttingDown()) { 2547 r.setSleeping(true); 2548 } 2549 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2550 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2551 } catch (Exception e) { 2552 // Maybe just ignore exceptions here... if the process 2553 // has crashed, our death notification will clean things 2554 // up. 2555 Slog.w(TAG, "Exception thrown during pause", e); 2556 // Just in case, assume it to be stopped. 2557 r.stopped = true; 2558 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2559 r.state = ActivityState.STOPPED; 2560 if (r.configDestroy) { 2561 destroyActivityLocked(r, true, "stop-except"); 2562 } 2563 } 2564 } 2565 } 2566 2567 /** 2568 * @return Returns true if the activity is being finished, false if for 2569 * some reason it is being left as-is. 2570 */ 2571 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2572 Intent resultData, String reason, boolean oomAdj) { 2573 ActivityRecord r = isInStackLocked(token); 2574 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2575 TAG, "Finishing activity token=" + token + " r=" 2576 + ", result=" + resultCode + ", data=" + resultData 2577 + ", reason=" + reason); 2578 if (r == null) { 2579 return false; 2580 } 2581 2582 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2583 return true; 2584 } 2585 2586 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2587 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2588 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2589 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2590 ActivityRecord r = activities.get(activityNdx); 2591 if (r.resultTo == self && r.requestCode == requestCode) { 2592 if ((r.resultWho == null && resultWho == null) || 2593 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2594 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2595 false); 2596 } 2597 } 2598 } 2599 } 2600 mService.updateOomAdjLocked(); 2601 } 2602 2603 final void finishTopRunningActivityLocked(ProcessRecord app) { 2604 ActivityRecord r = topRunningActivityLocked(null); 2605 if (r != null && r.app == app) { 2606 // If the top running activity is from this crashing 2607 // process, then terminate it to avoid getting in a loop. 2608 Slog.w(TAG, " Force finishing activity " 2609 + r.intent.getComponent().flattenToShortString()); 2610 int taskNdx = mTaskHistory.indexOf(r.task); 2611 int activityNdx = r.task.mActivities.indexOf(r); 2612 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2613 // Also terminate any activities below it that aren't yet 2614 // stopped, to avoid a situation where one will get 2615 // re-start our crashing activity once it gets resumed again. 2616 --activityNdx; 2617 if (activityNdx < 0) { 2618 do { 2619 --taskNdx; 2620 if (taskNdx < 0) { 2621 break; 2622 } 2623 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2624 } while (activityNdx < 0); 2625 } 2626 if (activityNdx >= 0) { 2627 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2628 if (r.state == ActivityState.RESUMED 2629 || r.state == ActivityState.PAUSING 2630 || r.state == ActivityState.PAUSED) { 2631 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2632 Slog.w(TAG, " Force finishing activity " 2633 + r.intent.getComponent().flattenToShortString()); 2634 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2635 } 2636 } 2637 } 2638 } 2639 } 2640 2641 final void finishVoiceTask(IVoiceInteractionSession session) { 2642 IBinder sessionBinder = session.asBinder(); 2643 boolean didOne = false; 2644 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2645 TaskRecord tr = mTaskHistory.get(taskNdx); 2646 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2647 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2648 ActivityRecord r = tr.mActivities.get(activityNdx); 2649 if (!r.finishing) { 2650 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2651 false); 2652 didOne = true; 2653 } 2654 } 2655 } 2656 } 2657 if (didOne) { 2658 mService.updateOomAdjLocked(); 2659 } 2660 } 2661 2662 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2663 ArrayList<ActivityRecord> activities = r.task.mActivities; 2664 for (int index = activities.indexOf(r); index >= 0; --index) { 2665 ActivityRecord cur = activities.get(index); 2666 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2667 break; 2668 } 2669 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2670 } 2671 return true; 2672 } 2673 2674 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2675 // send the result 2676 ActivityRecord resultTo = r.resultTo; 2677 if (resultTo != null) { 2678 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2679 + " who=" + r.resultWho + " req=" + r.requestCode 2680 + " res=" + resultCode + " data=" + resultData); 2681 if (resultTo.userId != r.userId) { 2682 if (resultData != null) { 2683 resultData.setContentUserHint(r.userId); 2684 } 2685 } 2686 if (r.info.applicationInfo.uid > 0) { 2687 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2688 resultTo.packageName, resultData, 2689 resultTo.getUriPermissionsLocked(), resultTo.userId); 2690 } 2691 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2692 resultData); 2693 r.resultTo = null; 2694 } 2695 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2696 2697 // Make sure this HistoryRecord is not holding on to other resources, 2698 // because clients have remote IPC references to this object so we 2699 // can't assume that will go away and want to avoid circular IPC refs. 2700 r.results = null; 2701 r.pendingResults = null; 2702 r.newIntents = null; 2703 r.icicle = null; 2704 } 2705 2706 /** 2707 * @return Returns true if this activity has been removed from the history 2708 * list, or false if it is still in the list and will be removed later. 2709 */ 2710 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2711 String reason, boolean oomAdj) { 2712 if (r.finishing) { 2713 Slog.w(TAG, "Duplicate finish request for " + r); 2714 return false; 2715 } 2716 2717 r.makeFinishing(); 2718 final TaskRecord task = r.task; 2719 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2720 r.userId, System.identityHashCode(r), 2721 task.taskId, r.shortComponentName, reason); 2722 final ArrayList<ActivityRecord> activities = task.mActivities; 2723 final int index = activities.indexOf(r); 2724 if (index < (activities.size() - 1)) { 2725 task.setFrontOfTask(); 2726 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2727 // If the caller asked that this activity (and all above it) 2728 // be cleared when the task is reset, don't lose that information, 2729 // but propagate it up to the next activity. 2730 ActivityRecord next = activities.get(index+1); 2731 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2732 } 2733 } 2734 2735 r.pauseKeyDispatchingLocked(); 2736 2737 adjustFocusedActivityLocked(r); 2738 2739 finishActivityResultsLocked(r, resultCode, resultData); 2740 2741 if (mResumedActivity == r) { 2742 boolean endTask = index <= 0; 2743 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2744 "Prepare close transition: finishing " + r); 2745 mWindowManager.prepareAppTransition(endTask 2746 ? AppTransition.TRANSIT_TASK_CLOSE 2747 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2748 2749 // Tell window manager to prepare for this one to be removed. 2750 mWindowManager.setAppVisibility(r.appToken, false); 2751 2752 if (mPausingActivity == null) { 2753 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2754 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2755 startPausingLocked(false, false, false, false); 2756 } 2757 2758 if (endTask) { 2759 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2760 } 2761 } else if (r.state != ActivityState.PAUSING) { 2762 // If the activity is PAUSING, we will complete the finish once 2763 // it is done pausing; else we can just directly finish it here. 2764 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2765 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2766 } else { 2767 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2768 } 2769 2770 return false; 2771 } 2772 2773 static final int FINISH_IMMEDIATELY = 0; 2774 static final int FINISH_AFTER_PAUSE = 1; 2775 static final int FINISH_AFTER_VISIBLE = 2; 2776 2777 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2778 // First things first: if this activity is currently visible, 2779 // and the resumed activity is not yet visible, then hold off on 2780 // finishing until the resumed one becomes visible. 2781 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2782 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2783 mStackSupervisor.mStoppingActivities.add(r); 2784 if (mStackSupervisor.mStoppingActivities.size() > 3 2785 || r.frontOfTask && mTaskHistory.size() <= 1) { 2786 // If we already have a few activities waiting to stop, 2787 // then give up on things going idle and start clearing 2788 // them out. Or if r is the last of activity of the last task the stack 2789 // will be empty and must be cleared immediately. 2790 mStackSupervisor.scheduleIdleLocked(); 2791 } else { 2792 mStackSupervisor.checkReadyForSleepLocked(); 2793 } 2794 } 2795 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2796 + " (finish requested)"); 2797 r.state = ActivityState.STOPPING; 2798 if (oomAdj) { 2799 mService.updateOomAdjLocked(); 2800 } 2801 return r; 2802 } 2803 2804 // make sure the record is cleaned out of other places. 2805 mStackSupervisor.mStoppingActivities.remove(r); 2806 mStackSupervisor.mGoingToSleepActivities.remove(r); 2807 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2808 if (mResumedActivity == r) { 2809 mResumedActivity = null; 2810 } 2811 final ActivityState prevState = r.state; 2812 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2813 r.state = ActivityState.FINISHING; 2814 2815 if (mode == FINISH_IMMEDIATELY 2816 || prevState == ActivityState.STOPPED 2817 || prevState == ActivityState.INITIALIZING) { 2818 // If this activity is already stopped, we can just finish 2819 // it right now. 2820 r.makeFinishing(); 2821 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2822 if (activityRemoved) { 2823 mStackSupervisor.resumeTopActivitiesLocked(); 2824 } 2825 if (DEBUG_CONTAINERS) Slog.d(TAG, 2826 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2827 " destroy returned removed=" + activityRemoved); 2828 return activityRemoved ? null : r; 2829 } 2830 2831 // Need to go through the full pause cycle to get this 2832 // activity into the stopped state and then finish it. 2833 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2834 mStackSupervisor.mFinishingActivities.add(r); 2835 r.resumeKeyDispatchingLocked(); 2836 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2837 return r; 2838 } 2839 2840 void finishAllActivitiesLocked(boolean immediately) { 2841 boolean noActivitiesInStack = true; 2842 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2843 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2844 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2845 final ActivityRecord r = activities.get(activityNdx); 2846 noActivitiesInStack = false; 2847 if (r.finishing && !immediately) { 2848 continue; 2849 } 2850 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2851 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2852 } 2853 } 2854 if (noActivitiesInStack) { 2855 mActivityContainer.onTaskListEmptyLocked(); 2856 } 2857 } 2858 2859 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2860 // Basic case: for simple app-centric recents, we need to recreate 2861 // the task if the affinity has changed. 2862 if (srec == null || srec.task.affinity == null || 2863 !srec.task.affinity.equals(destAffinity)) { 2864 return true; 2865 } 2866 // Document-centric case: an app may be split in to multiple documents; 2867 // they need to re-create their task if this current activity is the root 2868 // of a document, unless simply finishing it will return them to the the 2869 // correct app behind. 2870 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 2871 && srec.task.getBaseIntent().isDocument()) { 2872 // Okay, this activity is at the root of its task. What to do, what to do... 2873 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2874 // Finishing won't return to an application, so we need to recreate. 2875 return true; 2876 } 2877 // We now need to get the task below it to determine what to do. 2878 int taskIdx = mTaskHistory.indexOf(srec.task); 2879 if (taskIdx <= 0) { 2880 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2881 return false; 2882 } 2883 if (taskIdx == 0) { 2884 // At the bottom of the stack, nothing to go back to. 2885 return true; 2886 } 2887 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2888 if (!srec.task.affinity.equals(prevTask.affinity)) { 2889 // These are different apps, so need to recreate. 2890 return true; 2891 } 2892 } 2893 return false; 2894 } 2895 2896 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2897 Intent resultData) { 2898 final ActivityRecord srec = ActivityRecord.forToken(token); 2899 final TaskRecord task = srec.task; 2900 final ArrayList<ActivityRecord> activities = task.mActivities; 2901 final int start = activities.indexOf(srec); 2902 if (!mTaskHistory.contains(task) || (start < 0)) { 2903 return false; 2904 } 2905 int finishTo = start - 1; 2906 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2907 boolean foundParentInTask = false; 2908 final ComponentName dest = destIntent.getComponent(); 2909 if (start > 0 && dest != null) { 2910 for (int i = finishTo; i >= 0; i--) { 2911 ActivityRecord r = activities.get(i); 2912 if (r.info.packageName.equals(dest.getPackageName()) && 2913 r.info.name.equals(dest.getClassName())) { 2914 finishTo = i; 2915 parent = r; 2916 foundParentInTask = true; 2917 break; 2918 } 2919 } 2920 } 2921 2922 IActivityController controller = mService.mController; 2923 if (controller != null) { 2924 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2925 if (next != null) { 2926 // ask watcher if this is allowed 2927 boolean resumeOK = true; 2928 try { 2929 resumeOK = controller.activityResuming(next.packageName); 2930 } catch (RemoteException e) { 2931 mService.mController = null; 2932 Watchdog.getInstance().setActivityController(null); 2933 } 2934 2935 if (!resumeOK) { 2936 return false; 2937 } 2938 } 2939 } 2940 final long origId = Binder.clearCallingIdentity(); 2941 for (int i = start; i > finishTo; i--) { 2942 ActivityRecord r = activities.get(i); 2943 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2944 // Only return the supplied result for the first activity finished 2945 resultCode = Activity.RESULT_CANCELED; 2946 resultData = null; 2947 } 2948 2949 if (parent != null && foundParentInTask) { 2950 final int parentLaunchMode = parent.info.launchMode; 2951 final int destIntentFlags = destIntent.getFlags(); 2952 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2953 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2954 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2955 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2956 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2957 } else { 2958 try { 2959 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2960 destIntent.getComponent(), 0, srec.userId); 2961 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2962 null, aInfo, null, null, parent.appToken, null, 2963 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2964 -1, parent.launchedFromUid, 0, null, true, null, null, null); 2965 foundParentInTask = res == ActivityManager.START_SUCCESS; 2966 } catch (RemoteException e) { 2967 foundParentInTask = false; 2968 } 2969 requestFinishActivityLocked(parent.appToken, resultCode, 2970 resultData, "navigate-up", true); 2971 } 2972 } 2973 Binder.restoreCallingIdentity(origId); 2974 return foundParentInTask; 2975 } 2976 /** 2977 * Perform the common clean-up of an activity record. This is called both 2978 * as part of destroyActivityLocked() (when destroying the client-side 2979 * representation) and cleaning things up as a result of its hosting 2980 * processing going away, in which case there is no remaining client-side 2981 * state to destroy so only the cleanup here is needed. 2982 */ 2983 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2984 boolean setState) { 2985 if (mResumedActivity == r) { 2986 mResumedActivity = null; 2987 } 2988 if (mPausingActivity == r) { 2989 mPausingActivity = null; 2990 } 2991 mService.clearFocusedActivity(r); 2992 2993 r.configDestroy = false; 2994 r.frozenBeforeDestroy = false; 2995 2996 if (setState) { 2997 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2998 r.state = ActivityState.DESTROYED; 2999 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 3000 r.app = null; 3001 } 3002 3003 // Make sure this record is no longer in the pending finishes list. 3004 // This could happen, for example, if we are trimming activities 3005 // down to the max limit while they are still waiting to finish. 3006 mStackSupervisor.mFinishingActivities.remove(r); 3007 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3008 3009 // Remove any pending results. 3010 if (r.finishing && r.pendingResults != null) { 3011 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3012 PendingIntentRecord rec = apr.get(); 3013 if (rec != null) { 3014 mService.cancelIntentSenderLocked(rec, false); 3015 } 3016 } 3017 r.pendingResults = null; 3018 } 3019 3020 if (cleanServices) { 3021 cleanUpActivityServicesLocked(r); 3022 } 3023 3024 // Get rid of any pending idle timeouts. 3025 removeTimeoutsForActivityLocked(r); 3026 if (getVisibleBehindActivity() == r) { 3027 mStackSupervisor.requestVisibleBehindLocked(r, false); 3028 } 3029 } 3030 3031 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3032 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3033 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3034 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3035 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3036 r.finishLaunchTickingLocked(); 3037 } 3038 3039 private void removeActivityFromHistoryLocked(ActivityRecord r) { 3040 mStackSupervisor.removeChildActivityContainers(r); 3041 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3042 r.makeFinishing(); 3043 if (DEBUG_ADD_REMOVE) { 3044 RuntimeException here = new RuntimeException("here"); 3045 here.fillInStackTrace(); 3046 Slog.i(TAG, "Removing activity " + r + " from stack"); 3047 } 3048 r.takeFromHistory(); 3049 removeTimeoutsForActivityLocked(r); 3050 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3051 r.state = ActivityState.DESTROYED; 3052 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3053 r.app = null; 3054 mWindowManager.removeAppToken(r.appToken); 3055 if (VALIDATE_TOKENS) { 3056 validateAppTokensLocked(); 3057 } 3058 final TaskRecord task = r.task; 3059 if (task != null && task.removeActivity(r)) { 3060 if (DEBUG_STACK) Slog.i(TAG, 3061 "removeActivityFromHistoryLocked: last activity removed from " + this); 3062 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3063 task.isOverHomeStack()) { 3064 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3065 } 3066 removeTask(task); 3067 } 3068 cleanUpActivityServicesLocked(r); 3069 r.removeUriPermissionsLocked(); 3070 } 3071 3072 /** 3073 * Perform clean-up of service connections in an activity record. 3074 */ 3075 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3076 // Throw away any services that have been bound by this activity. 3077 if (r.connections != null) { 3078 Iterator<ConnectionRecord> it = r.connections.iterator(); 3079 while (it.hasNext()) { 3080 ConnectionRecord c = it.next(); 3081 mService.mServices.removeConnectionLocked(c, null, r); 3082 } 3083 r.connections = null; 3084 } 3085 } 3086 3087 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3088 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3089 msg.obj = new ScheduleDestroyArgs(owner, reason); 3090 mHandler.sendMessage(msg); 3091 } 3092 3093 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3094 boolean lastIsOpaque = false; 3095 boolean activityRemoved = false; 3096 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3097 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3098 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3099 final ActivityRecord r = activities.get(activityNdx); 3100 if (r.finishing) { 3101 continue; 3102 } 3103 if (r.fullscreen) { 3104 lastIsOpaque = true; 3105 } 3106 if (owner != null && r.app != owner) { 3107 continue; 3108 } 3109 if (!lastIsOpaque) { 3110 continue; 3111 } 3112 if (r.isDestroyable()) { 3113 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3114 + " resumed=" + mResumedActivity 3115 + " pausing=" + mPausingActivity + " for reason " + reason); 3116 if (destroyActivityLocked(r, true, reason)) { 3117 activityRemoved = true; 3118 } 3119 } 3120 } 3121 } 3122 if (activityRemoved) { 3123 mStackSupervisor.resumeTopActivitiesLocked(); 3124 } 3125 } 3126 3127 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3128 if (r.isDestroyable()) { 3129 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3130 + " resumed=" + mResumedActivity 3131 + " pausing=" + mPausingActivity + " for reason " + reason); 3132 return destroyActivityLocked(r, true, reason); 3133 } 3134 return false; 3135 } 3136 3137 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3138 String reason) { 3139 // Iterate over tasks starting at the back (oldest) first. 3140 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3141 int maxTasks = tasks.size() / 4; 3142 if (maxTasks < 1) { 3143 maxTasks = 1; 3144 } 3145 int numReleased = 0; 3146 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3147 final TaskRecord task = mTaskHistory.get(taskNdx); 3148 if (!tasks.contains(task)) { 3149 continue; 3150 } 3151 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3152 int curNum = 0; 3153 final ArrayList<ActivityRecord> activities = task.mActivities; 3154 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3155 final ActivityRecord activity = activities.get(actNdx); 3156 if (activity.app == app && activity.isDestroyable()) { 3157 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3158 + " in state " + activity.state + " resumed=" + mResumedActivity 3159 + " pausing=" + mPausingActivity + " for reason " + reason); 3160 destroyActivityLocked(activity, true, reason); 3161 if (activities.get(actNdx) != activity) { 3162 // Was removed from list, back up so we don't miss the next one. 3163 actNdx--; 3164 } 3165 curNum++; 3166 } 3167 } 3168 if (curNum > 0) { 3169 numReleased += curNum; 3170 maxTasks--; 3171 if (mTaskHistory.get(taskNdx) != task) { 3172 // The entire task got removed, back up so we don't miss the next one. 3173 taskNdx--; 3174 } 3175 } 3176 } 3177 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3178 return numReleased; 3179 } 3180 3181 /** 3182 * Destroy the current CLIENT SIDE instance of an activity. This may be 3183 * called both when actually finishing an activity, or when performing 3184 * a configuration switch where we destroy the current client-side object 3185 * but then create a new client-side object for this same HistoryRecord. 3186 */ 3187 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3188 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3189 TAG, "Removing activity from " + reason + ": token=" + r 3190 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3191 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3192 r.userId, System.identityHashCode(r), 3193 r.task.taskId, r.shortComponentName, reason); 3194 3195 boolean removedFromHistory = false; 3196 3197 cleanUpActivityLocked(r, false, false); 3198 3199 final boolean hadApp = r.app != null; 3200 3201 if (hadApp) { 3202 if (removeFromApp) { 3203 r.app.activities.remove(r); 3204 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3205 mService.mHeavyWeightProcess = null; 3206 mService.mHandler.sendEmptyMessage( 3207 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3208 } 3209 if (r.app.activities.isEmpty()) { 3210 // Update any services we are bound to that might care about whether 3211 // their client may have activities. 3212 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3213 // No longer have activities, so update LRU list and oom adj. 3214 mService.updateLruProcessLocked(r.app, false, null); 3215 mService.updateOomAdjLocked(); 3216 } 3217 } 3218 3219 boolean skipDestroy = false; 3220 3221 try { 3222 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3223 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3224 r.configChangeFlags); 3225 } catch (Exception e) { 3226 // We can just ignore exceptions here... if the process 3227 // has crashed, our death notification will clean things 3228 // up. 3229 //Slog.w(TAG, "Exception thrown during finish", e); 3230 if (r.finishing) { 3231 removeActivityFromHistoryLocked(r); 3232 removedFromHistory = true; 3233 skipDestroy = true; 3234 } 3235 } 3236 3237 r.nowVisible = false; 3238 3239 // If the activity is finishing, we need to wait on removing it 3240 // from the list to give it a chance to do its cleanup. During 3241 // that time it may make calls back with its token so we need to 3242 // be able to find it on the list and so we don't want to remove 3243 // it from the list yet. Otherwise, we can just immediately put 3244 // it in the destroyed state since we are not removing it from the 3245 // list. 3246 if (r.finishing && !skipDestroy) { 3247 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3248 + " (destroy requested)"); 3249 r.state = ActivityState.DESTROYING; 3250 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3251 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3252 } else { 3253 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3254 r.state = ActivityState.DESTROYED; 3255 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3256 r.app = null; 3257 } 3258 } else { 3259 // remove this record from the history. 3260 if (r.finishing) { 3261 removeActivityFromHistoryLocked(r); 3262 removedFromHistory = true; 3263 } else { 3264 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3265 r.state = ActivityState.DESTROYED; 3266 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3267 r.app = null; 3268 } 3269 } 3270 3271 r.configChangeFlags = 0; 3272 3273 if (!mLRUActivities.remove(r) && hadApp) { 3274 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3275 } 3276 3277 return removedFromHistory; 3278 } 3279 3280 final void activityDestroyedLocked(IBinder token) { 3281 final long origId = Binder.clearCallingIdentity(); 3282 try { 3283 ActivityRecord r = ActivityRecord.forToken(token); 3284 if (r != null) { 3285 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3286 } 3287 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3288 3289 if (isInStackLocked(token) != null) { 3290 if (r.state == ActivityState.DESTROYING) { 3291 cleanUpActivityLocked(r, true, false); 3292 removeActivityFromHistoryLocked(r); 3293 } 3294 } 3295 mStackSupervisor.resumeTopActivitiesLocked(); 3296 } finally { 3297 Binder.restoreCallingIdentity(origId); 3298 } 3299 } 3300 3301 void releaseBackgroundResources() { 3302 if (hasVisibleBehindActivity() && 3303 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3304 final ActivityRecord r = getVisibleBehindActivity(); 3305 if (r == topRunningActivityLocked(null)) { 3306 // Don't release the top activity if it has requested to run behind the next 3307 // activity. 3308 return; 3309 } 3310 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3311 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3312 " thread=" + r.app.thread); 3313 if (r != null && r.app != null && r.app.thread != null) { 3314 try { 3315 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3316 } catch (RemoteException e) { 3317 } 3318 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3319 } else { 3320 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3321 backgroundResourcesReleased(r.appToken); 3322 } 3323 } 3324 } 3325 3326 final void backgroundResourcesReleased(IBinder token) { 3327 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3328 final ActivityRecord r = getVisibleBehindActivity(); 3329 if (r != null) { 3330 mStackSupervisor.mStoppingActivities.add(r); 3331 setVisibleBehindActivity(null); 3332 } 3333 mStackSupervisor.resumeTopActivitiesLocked(); 3334 } 3335 3336 boolean hasVisibleBehindActivity() { 3337 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3338 } 3339 3340 void setVisibleBehindActivity(ActivityRecord r) { 3341 if (isAttached()) { 3342 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3343 } 3344 } 3345 3346 ActivityRecord getVisibleBehindActivity() { 3347 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3348 } 3349 3350 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3351 ProcessRecord app, String listName) { 3352 int i = list.size(); 3353 if (DEBUG_CLEANUP) Slog.v( 3354 TAG, "Removing app " + app + " from list " + listName 3355 + " with " + i + " entries"); 3356 while (i > 0) { 3357 i--; 3358 ActivityRecord r = list.get(i); 3359 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3360 if (r.app == app) { 3361 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3362 list.remove(i); 3363 removeTimeoutsForActivityLocked(r); 3364 } 3365 } 3366 } 3367 3368 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3369 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3370 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3371 "mStoppingActivities"); 3372 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3373 "mGoingToSleepActivities"); 3374 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3375 "mWaitingVisibleActivities"); 3376 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3377 "mFinishingActivities"); 3378 3379 boolean hasVisibleActivities = false; 3380 3381 // Clean out the history list. 3382 int i = numActivities(); 3383 if (DEBUG_CLEANUP) Slog.v( 3384 TAG, "Removing app " + app + " from history with " + i + " entries"); 3385 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3386 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3387 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3388 final ActivityRecord r = activities.get(activityNdx); 3389 --i; 3390 if (DEBUG_CLEANUP) Slog.v( 3391 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3392 if (r.app == app) { 3393 boolean remove; 3394 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3395 // Don't currently have state for the activity, or 3396 // it is finishing -- always remove it. 3397 remove = true; 3398 } else if (r.launchCount > 2 && 3399 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3400 // We have launched this activity too many times since it was 3401 // able to run, so give up and remove it. 3402 remove = true; 3403 } else { 3404 // The process may be gone, but the activity lives on! 3405 remove = false; 3406 } 3407 if (remove) { 3408 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3409 RuntimeException here = new RuntimeException("here"); 3410 here.fillInStackTrace(); 3411 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3412 + ": haveState=" + r.haveState 3413 + " stateNotNeeded=" + r.stateNotNeeded 3414 + " finishing=" + r.finishing 3415 + " state=" + r.state, here); 3416 } 3417 if (!r.finishing) { 3418 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3419 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3420 r.userId, System.identityHashCode(r), 3421 r.task.taskId, r.shortComponentName, 3422 "proc died without state saved"); 3423 if (r.state == ActivityState.RESUMED) { 3424 mService.updateUsageStats(r, false); 3425 } 3426 } 3427 removeActivityFromHistoryLocked(r); 3428 3429 } else { 3430 // We have the current state for this activity, so 3431 // it can be restarted later when needed. 3432 if (localLOGV) Slog.v( 3433 TAG, "Keeping entry, setting app to null"); 3434 if (r.visible) { 3435 hasVisibleActivities = true; 3436 } 3437 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3438 + r); 3439 r.app = null; 3440 r.nowVisible = false; 3441 if (!r.haveState) { 3442 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3443 "App died, clearing saved state of " + r); 3444 r.icicle = null; 3445 } 3446 } 3447 3448 cleanUpActivityLocked(r, true, true); 3449 } 3450 } 3451 } 3452 3453 return hasVisibleActivities; 3454 } 3455 3456 final void updateTransitLocked(int transit, Bundle options) { 3457 if (options != null) { 3458 ActivityRecord r = topRunningActivityLocked(null); 3459 if (r != null && r.state != ActivityState.RESUMED) { 3460 r.updateOptionsLocked(options); 3461 } else { 3462 ActivityOptions.abort(options); 3463 } 3464 } 3465 mWindowManager.prepareAppTransition(transit, false); 3466 } 3467 3468 void updateTaskMovement(TaskRecord task, boolean toFront) { 3469 if (task.isPersistable) { 3470 task.mLastTimeMoved = System.currentTimeMillis(); 3471 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3472 // recently will be most negative, tasks sent to the bottom before that will be less 3473 // negative. Similarly for recent tasks moved to the top which will be most positive. 3474 if (!toFront) { 3475 task.mLastTimeMoved *= -1; 3476 } 3477 } 3478 } 3479 3480 void moveHomeStackTaskToTop(int homeStackTaskType) { 3481 final int top = mTaskHistory.size() - 1; 3482 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3483 final TaskRecord task = mTaskHistory.get(taskNdx); 3484 if (task.taskType == homeStackTaskType) { 3485 if (DEBUG_TASKS || DEBUG_STACK) 3486 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3487 mTaskHistory.remove(taskNdx); 3488 mTaskHistory.add(top, task); 3489 updateTaskMovement(task, true); 3490 mWindowManager.moveTaskToTop(task.taskId); 3491 return; 3492 } 3493 } 3494 } 3495 3496 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3497 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3498 3499 final int numTasks = mTaskHistory.size(); 3500 final int index = mTaskHistory.indexOf(tr); 3501 if (numTasks == 0 || index < 0) { 3502 // nothing to do! 3503 if (reason != null && 3504 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3505 ActivityOptions.abort(options); 3506 } else { 3507 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3508 } 3509 return; 3510 } 3511 3512 moveToFront(); 3513 3514 // Shift all activities with this task up to the top 3515 // of the stack, keeping them in the same internal order. 3516 insertTaskAtTop(tr); 3517 3518 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3519 if (reason != null && 3520 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3521 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3522 ActivityRecord r = topRunningActivityLocked(null); 3523 if (r != null) { 3524 mNoAnimActivities.add(r); 3525 } 3526 ActivityOptions.abort(options); 3527 } else { 3528 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3529 } 3530 3531 mWindowManager.moveTaskToTop(tr.taskId); 3532 3533 mStackSupervisor.resumeTopActivitiesLocked(); 3534 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3535 3536 if (VALIDATE_TOKENS) { 3537 validateAppTokensLocked(); 3538 } 3539 } 3540 3541 /** 3542 * Worker method for rearranging history stack. Implements the function of moving all 3543 * activities for a specific task (gathering them if disjoint) into a single group at the 3544 * bottom of the stack. 3545 * 3546 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3547 * to premeptively cancel the move. 3548 * 3549 * @param taskId The taskId to collect and move to the bottom. 3550 * @return Returns true if the move completed, false if not. 3551 */ 3552 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3553 final TaskRecord tr = taskForIdLocked(taskId); 3554 if (tr == null) { 3555 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3556 return false; 3557 } 3558 3559 Slog.i(TAG, "moveTaskToBack: " + tr); 3560 3561 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3562 3563 // If we have a watcher, preflight the move before committing to it. First check 3564 // for *other* available tasks, but if none are available, then try again allowing the 3565 // current task to be selected. 3566 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3567 ActivityRecord next = topRunningActivityLocked(null, taskId); 3568 if (next == null) { 3569 next = topRunningActivityLocked(null, 0); 3570 } 3571 if (next != null) { 3572 // ask watcher if this is allowed 3573 boolean moveOK = true; 3574 try { 3575 moveOK = mService.mController.activityResuming(next.packageName); 3576 } catch (RemoteException e) { 3577 mService.mController = null; 3578 Watchdog.getInstance().setActivityController(null); 3579 } 3580 if (!moveOK) { 3581 return false; 3582 } 3583 } 3584 } 3585 3586 if (DEBUG_TRANSITION) Slog.v(TAG, 3587 "Prepare to back transition: task=" + taskId); 3588 3589 mTaskHistory.remove(tr); 3590 mTaskHistory.add(0, tr); 3591 updateTaskMovement(tr, false); 3592 3593 // There is an assumption that moving a task to the back moves it behind the home activity. 3594 // We make sure here that some activity in the stack will launch home. 3595 int numTasks = mTaskHistory.size(); 3596 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3597 final TaskRecord task = mTaskHistory.get(taskNdx); 3598 if (task.isOverHomeStack()) { 3599 break; 3600 } 3601 if (taskNdx == 1) { 3602 // Set the last task before tr to go to home. 3603 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3604 } 3605 } 3606 3607 if (reason != null && 3608 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3609 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3610 ActivityRecord r = topRunningActivityLocked(null); 3611 if (r != null) { 3612 mNoAnimActivities.add(r); 3613 } 3614 } else { 3615 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3616 } 3617 mWindowManager.moveTaskToBottom(taskId); 3618 3619 if (VALIDATE_TOKENS) { 3620 validateAppTokensLocked(); 3621 } 3622 3623 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3624 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3625 if (!mService.mBooting && !mService.mBooted) { 3626 // Not ready yet! 3627 return false; 3628 } 3629 final int taskToReturnTo = tr.getTaskToReturnTo(); 3630 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3631 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3632 } 3633 3634 mStackSupervisor.resumeTopActivitiesLocked(); 3635 return true; 3636 } 3637 3638 static final void logStartActivity(int tag, ActivityRecord r, 3639 TaskRecord task) { 3640 final Uri data = r.intent.getData(); 3641 final String strData = data != null ? data.toSafeString() : null; 3642 3643 EventLog.writeEvent(tag, 3644 r.userId, System.identityHashCode(r), task.taskId, 3645 r.shortComponentName, r.intent.getAction(), 3646 r.intent.getType(), strData, r.intent.getFlags()); 3647 } 3648 3649 /** 3650 * Make sure the given activity matches the current configuration. Returns 3651 * false if the activity had to be destroyed. Returns true if the 3652 * configuration is the same, or the activity will remain running as-is 3653 * for whatever reason. Ensures the HistoryRecord is updated with the 3654 * correct configuration and all other bookkeeping is handled. 3655 */ 3656 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3657 int globalChanges) { 3658 if (mConfigWillChange) { 3659 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3660 "Skipping config check (will change): " + r); 3661 return true; 3662 } 3663 3664 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3665 "Ensuring correct configuration: " + r); 3666 3667 // Short circuit: if the two configurations are the exact same 3668 // object (the common case), then there is nothing to do. 3669 Configuration newConfig = mService.mConfiguration; 3670 if (r.configuration == newConfig && !r.forceNewConfig) { 3671 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3672 "Configuration unchanged in " + r); 3673 return true; 3674 } 3675 3676 // We don't worry about activities that are finishing. 3677 if (r.finishing) { 3678 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3679 "Configuration doesn't matter in finishing " + r); 3680 r.stopFreezingScreenLocked(false); 3681 return true; 3682 } 3683 3684 // Okay we now are going to make this activity have the new config. 3685 // But then we need to figure out how it needs to deal with that. 3686 Configuration oldConfig = r.configuration; 3687 r.configuration = newConfig; 3688 3689 // Determine what has changed. May be nothing, if this is a config 3690 // that has come back from the app after going idle. In that case 3691 // we just want to leave the official config object now in the 3692 // activity and do nothing else. 3693 final int changes = oldConfig.diff(newConfig); 3694 if (changes == 0 && !r.forceNewConfig) { 3695 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3696 "Configuration no differences in " + r); 3697 return true; 3698 } 3699 3700 // If the activity isn't currently running, just leave the new 3701 // configuration and it will pick that up next time it starts. 3702 if (r.app == null || r.app.thread == null) { 3703 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3704 "Configuration doesn't matter not running " + r); 3705 r.stopFreezingScreenLocked(false); 3706 r.forceNewConfig = false; 3707 return true; 3708 } 3709 3710 // Figure out how to handle the changes between the configurations. 3711 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3712 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3713 + Integer.toHexString(changes) + ", handles=0x" 3714 + Integer.toHexString(r.info.getRealConfigChanged()) 3715 + ", newConfig=" + newConfig); 3716 } 3717 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3718 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3719 r.configChangeFlags |= changes; 3720 r.startFreezingScreenLocked(r.app, globalChanges); 3721 r.forceNewConfig = false; 3722 if (r.app == null || r.app.thread == null) { 3723 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3724 "Config is destroying non-running " + r); 3725 destroyActivityLocked(r, true, "config"); 3726 } else if (r.state == ActivityState.PAUSING) { 3727 // A little annoying: we are waiting for this activity to 3728 // finish pausing. Let's not do anything now, but just 3729 // flag that it needs to be restarted when done pausing. 3730 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3731 "Config is skipping already pausing " + r); 3732 r.configDestroy = true; 3733 return true; 3734 } else if (r.state == ActivityState.RESUMED) { 3735 // Try to optimize this case: the configuration is changing 3736 // and we need to restart the top, resumed activity. 3737 // Instead of doing the normal handshaking, just say 3738 // "restart!". 3739 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3740 "Config is relaunching resumed " + r); 3741 relaunchActivityLocked(r, r.configChangeFlags, true); 3742 r.configChangeFlags = 0; 3743 } else { 3744 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3745 "Config is relaunching non-resumed " + r); 3746 relaunchActivityLocked(r, r.configChangeFlags, false); 3747 r.configChangeFlags = 0; 3748 } 3749 3750 // All done... tell the caller we weren't able to keep this 3751 // activity around. 3752 return false; 3753 } 3754 3755 // Default case: the activity can handle this new configuration, so 3756 // hand it over. Note that we don't need to give it the new 3757 // configuration, since we always send configuration changes to all 3758 // process when they happen so it can just use whatever configuration 3759 // it last got. 3760 if (r.app != null && r.app.thread != null) { 3761 try { 3762 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3763 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3764 } catch (RemoteException e) { 3765 // If process died, whatever. 3766 } 3767 } 3768 r.stopFreezingScreenLocked(false); 3769 3770 return true; 3771 } 3772 3773 private boolean relaunchActivityLocked(ActivityRecord r, 3774 int changes, boolean andResume) { 3775 List<ResultInfo> results = null; 3776 List<Intent> newIntents = null; 3777 if (andResume) { 3778 results = r.results; 3779 newIntents = r.newIntents; 3780 } 3781 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3782 + " with results=" + results + " newIntents=" + newIntents 3783 + " andResume=" + andResume); 3784 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3785 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3786 r.task.taskId, r.shortComponentName); 3787 3788 r.startFreezingScreenLocked(r.app, 0); 3789 3790 mStackSupervisor.removeChildActivityContainers(r); 3791 3792 try { 3793 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3794 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3795 + r); 3796 r.forceNewConfig = false; 3797 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3798 changes, !andResume, new Configuration(mService.mConfiguration)); 3799 // Note: don't need to call pauseIfSleepingLocked() here, because 3800 // the caller will only pass in 'andResume' if this activity is 3801 // currently resumed, which implies we aren't sleeping. 3802 } catch (RemoteException e) { 3803 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3804 } 3805 3806 if (andResume) { 3807 r.results = null; 3808 r.newIntents = null; 3809 r.state = ActivityState.RESUMED; 3810 } else { 3811 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3812 r.state = ActivityState.PAUSED; 3813 } 3814 3815 return true; 3816 } 3817 3818 boolean willActivityBeVisibleLocked(IBinder token) { 3819 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3820 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3821 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3822 final ActivityRecord r = activities.get(activityNdx); 3823 if (r.appToken == token) { 3824 return true; 3825 } 3826 if (r.fullscreen && !r.finishing) { 3827 return false; 3828 } 3829 } 3830 } 3831 final ActivityRecord r = ActivityRecord.forToken(token); 3832 if (r == null) { 3833 return false; 3834 } 3835 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3836 + " would have returned true for r=" + r); 3837 return !r.finishing; 3838 } 3839 3840 void closeSystemDialogsLocked() { 3841 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3842 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3843 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3844 final ActivityRecord r = activities.get(activityNdx); 3845 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3846 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3847 } 3848 } 3849 } 3850 } 3851 3852 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3853 boolean didSomething = false; 3854 TaskRecord lastTask = null; 3855 ComponentName homeActivity = null; 3856 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3857 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3858 int numActivities = activities.size(); 3859 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3860 ActivityRecord r = activities.get(activityNdx); 3861 final boolean samePackage = r.packageName.equals(name) 3862 || (name == null && r.userId == userId); 3863 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3864 && (samePackage || r.task == lastTask) 3865 && (r.app == null || evenPersistent || !r.app.persistent)) { 3866 if (!doit) { 3867 if (r.finishing) { 3868 // If this activity is just finishing, then it is not 3869 // interesting as far as something to stop. 3870 continue; 3871 } 3872 return true; 3873 } 3874 if (r.isHomeActivity()) { 3875 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3876 Slog.i(TAG, "Skip force-stop again " + r); 3877 continue; 3878 } else { 3879 homeActivity = r.realActivity; 3880 } 3881 } 3882 didSomething = true; 3883 Slog.i(TAG, " Force finishing activity " + r); 3884 if (samePackage) { 3885 if (r.app != null) { 3886 r.app.removed = true; 3887 } 3888 r.app = null; 3889 } 3890 lastTask = r.task; 3891 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3892 true)) { 3893 // r has been deleted from mActivities, accommodate. 3894 --numActivities; 3895 --activityNdx; 3896 } 3897 } 3898 } 3899 } 3900 return didSomething; 3901 } 3902 3903 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3904 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3905 final TaskRecord task = mTaskHistory.get(taskNdx); 3906 ActivityRecord r = null; 3907 ActivityRecord top = null; 3908 int numActivities = 0; 3909 int numRunning = 0; 3910 final ArrayList<ActivityRecord> activities = task.mActivities; 3911 if (activities.isEmpty()) { 3912 continue; 3913 } 3914 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3915 continue; 3916 } 3917 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3918 r = activities.get(activityNdx); 3919 3920 // Initialize state for next task if needed. 3921 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3922 top = r; 3923 numActivities = numRunning = 0; 3924 } 3925 3926 // Add 'r' into the current task. 3927 numActivities++; 3928 if (r.app != null && r.app.thread != null) { 3929 numRunning++; 3930 } 3931 3932 if (localLOGV) Slog.v( 3933 TAG, r.intent.getComponent().flattenToShortString() 3934 + ": task=" + r.task); 3935 } 3936 3937 RunningTaskInfo ci = new RunningTaskInfo(); 3938 ci.id = task.taskId; 3939 ci.baseActivity = r.intent.getComponent(); 3940 ci.topActivity = top.intent.getComponent(); 3941 ci.lastActiveTime = task.lastActiveTime; 3942 3943 if (top.task != null) { 3944 ci.description = top.task.lastDescription; 3945 } 3946 ci.numActivities = numActivities; 3947 ci.numRunning = numRunning; 3948 //System.out.println( 3949 // "#" + maxNum + ": " + " descr=" + ci.description); 3950 list.add(ci); 3951 } 3952 } 3953 3954 public void unhandledBackLocked() { 3955 final int top = mTaskHistory.size() - 1; 3956 if (DEBUG_SWITCH) Slog.d( 3957 TAG, "Performing unhandledBack(): top activity at " + top); 3958 if (top >= 0) { 3959 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3960 int activityTop = activities.size() - 1; 3961 if (activityTop > 0) { 3962 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3963 "unhandled-back", true); 3964 } 3965 } 3966 } 3967 3968 /** 3969 * Reset local parameters because an app's activity died. 3970 * @param app The app of the activity that died. 3971 * @return result from removeHistoryRecordsForAppLocked. 3972 */ 3973 boolean handleAppDiedLocked(ProcessRecord app) { 3974 if (mPausingActivity != null && mPausingActivity.app == app) { 3975 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3976 "App died while pausing: " + mPausingActivity); 3977 mPausingActivity = null; 3978 } 3979 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3980 mLastPausedActivity = null; 3981 mLastNoHistoryActivity = null; 3982 } 3983 3984 return removeHistoryRecordsForAppLocked(app); 3985 } 3986 3987 void handleAppCrashLocked(ProcessRecord app) { 3988 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3989 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3990 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3991 final ActivityRecord r = activities.get(activityNdx); 3992 if (r.app == app) { 3993 Slog.w(TAG, " Force finishing activity " 3994 + r.intent.getComponent().flattenToShortString()); 3995 // Force the destroy to skip right to removal. 3996 r.app = null; 3997 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3998 } 3999 } 4000 } 4001 } 4002 4003 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4004 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4005 boolean printed = false; 4006 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4007 final TaskRecord task = mTaskHistory.get(taskNdx); 4008 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4009 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4010 dumpClient, dumpPackage, needSep, header, 4011 " Task id #" + task.taskId); 4012 if (printed) { 4013 header = null; 4014 } 4015 } 4016 return printed; 4017 } 4018 4019 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4020 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4021 4022 if ("all".equals(name)) { 4023 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4024 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4025 } 4026 } else if ("top".equals(name)) { 4027 final int top = mTaskHistory.size() - 1; 4028 if (top >= 0) { 4029 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4030 int listTop = list.size() - 1; 4031 if (listTop >= 0) { 4032 activities.add(list.get(listTop)); 4033 } 4034 } 4035 } else { 4036 ItemMatcher matcher = new ItemMatcher(); 4037 matcher.build(name); 4038 4039 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4040 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4041 if (matcher.match(r1, r1.intent.getComponent())) { 4042 activities.add(r1); 4043 } 4044 } 4045 } 4046 } 4047 4048 return activities; 4049 } 4050 4051 ActivityRecord restartPackage(String packageName) { 4052 ActivityRecord starting = topRunningActivityLocked(null); 4053 4054 // All activities that came from the package must be 4055 // restarted as if there was a config change. 4056 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4057 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4058 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4059 final ActivityRecord a = activities.get(activityNdx); 4060 if (a.info.packageName.equals(packageName)) { 4061 a.forceNewConfig = true; 4062 if (starting != null && a == starting && a.visible) { 4063 a.startFreezingScreenLocked(starting.app, 4064 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4065 } 4066 } 4067 } 4068 } 4069 4070 return starting; 4071 } 4072 4073 void removeTask(TaskRecord task) { 4074 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4075 mWindowManager.removeTask(task.taskId); 4076 final ActivityRecord r = mResumedActivity; 4077 if (r != null && r.task == task) { 4078 mResumedActivity = null; 4079 } 4080 4081 final int taskNdx = mTaskHistory.indexOf(task); 4082 final int topTaskNdx = mTaskHistory.size() - 1; 4083 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4084 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4085 if (!nextTask.isOverHomeStack()) { 4086 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4087 } 4088 } 4089 mTaskHistory.remove(task); 4090 updateTaskMovement(task, true); 4091 4092 if (task.mActivities.isEmpty()) { 4093 final boolean isVoiceSession = task.voiceSession != null; 4094 if (isVoiceSession) { 4095 try { 4096 task.voiceSession.taskFinished(task.intent, task.taskId); 4097 } catch (RemoteException e) { 4098 } 4099 } 4100 if (task.autoRemoveFromRecents() || isVoiceSession) { 4101 // Task creator asked to remove this when done, or this task was a voice 4102 // interaction, so it should not remain on the recent tasks list. 4103 mService.mRecentTasks.remove(task); 4104 task.removedFromRecents(mService.mTaskPersister); 4105 } 4106 } 4107 4108 if (mTaskHistory.isEmpty()) { 4109 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4110 if (isOnHomeDisplay()) { 4111 mStackSupervisor.moveHomeStack(!isHomeStack()); 4112 } 4113 if (mStacks != null) { 4114 mStacks.remove(this); 4115 mStacks.add(0, this); 4116 } 4117 mActivityContainer.onTaskListEmptyLocked(); 4118 } 4119 } 4120 4121 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4122 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4123 boolean toTop) { 4124 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4125 voiceInteractor); 4126 addTask(task, toTop, false); 4127 return task; 4128 } 4129 4130 ArrayList<TaskRecord> getAllTasks() { 4131 return new ArrayList<TaskRecord>(mTaskHistory); 4132 } 4133 4134 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4135 task.stack = this; 4136 if (toTop) { 4137 insertTaskAtTop(task); 4138 } else { 4139 mTaskHistory.add(0, task); 4140 updateTaskMovement(task, false); 4141 } 4142 if (!moving && task.voiceSession != null) { 4143 try { 4144 task.voiceSession.taskStarted(task.intent, task.taskId); 4145 } catch (RemoteException e) { 4146 } 4147 } 4148 } 4149 4150 public int getStackId() { 4151 return mStackId; 4152 } 4153 4154 @Override 4155 public String toString() { 4156 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4157 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4158 } 4159} 4160