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 android.content.pm.ActivityInfo.FLAG_SHOW_FOR_ALL_USERS; 20 21import static com.android.server.am.ActivityManagerDebugConfig.*; 22 23import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 24import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 25 26import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 27 28import android.util.ArraySet; 29import com.android.internal.app.IVoiceInteractor; 30import com.android.internal.content.ReferrerIntent; 31import com.android.internal.os.BatteryStatsImpl; 32import com.android.server.Watchdog; 33import com.android.server.am.ActivityManagerService.ItemMatcher; 34import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 35import com.android.server.wm.AppTransition; 36import com.android.server.wm.TaskGroup; 37import com.android.server.wm.WindowManagerService; 38 39import android.app.Activity; 40import android.app.ActivityManager; 41import android.app.ActivityOptions; 42import android.app.AppGlobals; 43import android.app.IActivityController; 44import android.app.ResultInfo; 45import android.app.ActivityManager.RunningTaskInfo; 46import android.content.ComponentName; 47import android.content.Intent; 48import android.content.pm.ActivityInfo; 49import android.content.pm.PackageManager; 50import android.content.res.Configuration; 51import android.graphics.Bitmap; 52import android.net.Uri; 53import android.os.Binder; 54import android.os.Bundle; 55import android.os.Debug; 56import android.os.Handler; 57import android.os.IBinder; 58import android.os.Looper; 59import android.os.Message; 60import android.os.PersistableBundle; 61import android.os.RemoteException; 62import android.os.SystemClock; 63import android.os.Trace; 64import android.os.UserHandle; 65import android.service.voice.IVoiceInteractionSession; 66import android.util.EventLog; 67import android.util.Slog; 68import android.view.Display; 69 70import java.io.FileDescriptor; 71import java.io.PrintWriter; 72import java.lang.ref.WeakReference; 73import java.util.ArrayList; 74import java.util.Iterator; 75import java.util.List; 76import java.util.Objects; 77import java.util.Set; 78 79/** 80 * State and management of a single stack of activities. 81 */ 82final class ActivityStack { 83 84 private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM; 85 private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE; 86 private static final String TAG_APP = TAG + POSTFIX_APP; 87 private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP; 88 private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION; 89 private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS; 90 private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE; 91 private static final String TAG_RELEASE = TAG + POSTFIX_RELEASE; 92 private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS; 93 private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE; 94 private static final String TAG_SCREENSHOTS = TAG + POSTFIX_SCREENSHOTS; 95 private static final String TAG_STACK = TAG + POSTFIX_STACK; 96 private static final String TAG_STATES = TAG + POSTFIX_STATES; 97 private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH; 98 private static final String TAG_TASKS = TAG + POSTFIX_TASKS; 99 private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION; 100 private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING; 101 private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY; 102 103 private static final boolean VALIDATE_TOKENS = false; 104 105 // Ticks during which we check progress while waiting for an app to launch. 106 static final int LAUNCH_TICK = 500; 107 108 // How long we wait until giving up on the last activity to pause. This 109 // is short because it directly impacts the responsiveness of starting the 110 // next activity. 111 static final int PAUSE_TIMEOUT = 500; 112 113 // How long we wait for the activity to tell us it has stopped before 114 // giving up. This is a good amount of time because we really need this 115 // from the application in order to get its saved state. 116 static final int STOP_TIMEOUT = 10*1000; 117 118 // How long we wait until giving up on an activity telling us it has 119 // finished destroying itself. 120 static final int DESTROY_TIMEOUT = 10*1000; 121 122 // How long until we reset a task when the user returns to it. Currently 123 // disabled. 124 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 125 126 // How long between activity launches that we consider safe to not warn 127 // the user about an unexpected activity being launched on top. 128 static final long START_WARN_TIME = 5*1000; 129 130 // Set to false to disable the preview that is shown while a new activity 131 // is being started. 132 static final boolean SHOW_APP_STARTING_PREVIEW = true; 133 134 // How long to wait for all background Activities to redraw following a call to 135 // convertToTranslucent(). 136 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 137 138 enum ActivityState { 139 INITIALIZING, 140 RESUMED, 141 PAUSING, 142 PAUSED, 143 STOPPING, 144 STOPPED, 145 FINISHING, 146 DESTROYING, 147 DESTROYED 148 } 149 150 final ActivityManagerService mService; 151 final WindowManagerService mWindowManager; 152 private final RecentTasks mRecentTasks; 153 154 /** 155 * The back history of all previous (and possibly still 156 * running) activities. It contains #TaskRecord objects. 157 */ 158 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<>(); 159 160 /** 161 * Used for validating app tokens with window manager. 162 */ 163 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<>(); 164 165 /** 166 * List of running activities, sorted by recent usage. 167 * The first entry in the list is the least recently used. 168 * It contains HistoryRecord objects. 169 */ 170 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<>(); 171 172 /** 173 * Animations that for the current transition have requested not to 174 * be considered for the transition animation. 175 */ 176 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<>(); 177 178 /** 179 * When we are in the process of pausing an activity, before starting the 180 * next one, this variable holds the activity that is currently being paused. 181 */ 182 ActivityRecord mPausingActivity = null; 183 184 /** 185 * This is the last activity that we put into the paused state. This is 186 * used to determine if we need to do an activity transition while sleeping, 187 * when we normally hold the top activity paused. 188 */ 189 ActivityRecord mLastPausedActivity = null; 190 191 /** 192 * Activities that specify No History must be removed once the user navigates away from them. 193 * If the device goes to sleep with such an activity in the paused state then we save it here 194 * and finish it later if another activity replaces it on wakeup. 195 */ 196 ActivityRecord mLastNoHistoryActivity = null; 197 198 /** 199 * Current activity that is resumed, or null if there is none. 200 */ 201 ActivityRecord mResumedActivity = null; 202 203 /** 204 * This is the last activity that has been started. It is only used to 205 * identify when multiple activities are started at once so that the user 206 * can be warned they may not be in the activity they think they are. 207 */ 208 ActivityRecord mLastStartedActivity = null; 209 210 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 211 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 212 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 213 // Activity in mTranslucentActivityWaiting is notified via 214 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 215 // background activity being drawn then the same call will be made with a true value. 216 ActivityRecord mTranslucentActivityWaiting = null; 217 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 218 new ArrayList<ActivityRecord>(); 219 220 /** 221 * Set when we know we are going to be calling updateConfiguration() 222 * soon, so want to skip intermediate config checks. 223 */ 224 boolean mConfigWillChange; 225 226 // Whether or not this stack covers the entire screen; by default stacks are full screen 227 boolean mFullscreen = true; 228 229 long mLaunchStartTime = 0; 230 long mFullyDrawnStartTime = 0; 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 Configuration mOverrideConfig; 245 /** True if the stack was forced to full screen because {@link TaskRecord#mResizeable} is false 246 * and the stack was previously resized. */ 247 private boolean mForcedFullscreen = false; 248 249 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 250 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 251 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 252 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 253 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 254 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 255 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 256 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 257 258 static class ScheduleDestroyArgs { 259 final ProcessRecord mOwner; 260 final String mReason; 261 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 262 mOwner = owner; 263 mReason = reason; 264 } 265 } 266 267 final Handler mHandler; 268 269 final class ActivityStackHandler extends Handler { 270 271 ActivityStackHandler(Looper looper) { 272 super(looper); 273 } 274 275 @Override 276 public void handleMessage(Message msg) { 277 switch (msg.what) { 278 case PAUSE_TIMEOUT_MSG: { 279 ActivityRecord r = (ActivityRecord)msg.obj; 280 // We don't at this point know if the activity is fullscreen, 281 // so we need to be conservative and assume it isn't. 282 Slog.w(TAG, "Activity pause timeout for " + r); 283 synchronized (mService) { 284 if (r.app != null) { 285 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 286 } 287 activityPausedLocked(r.appToken, true); 288 } 289 } break; 290 case LAUNCH_TICK_MSG: { 291 ActivityRecord r = (ActivityRecord)msg.obj; 292 synchronized (mService) { 293 if (r.continueLaunchTickingLocked()) { 294 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 295 } 296 } 297 } break; 298 case DESTROY_TIMEOUT_MSG: { 299 ActivityRecord r = (ActivityRecord)msg.obj; 300 // We don't at this point know if the activity is fullscreen, 301 // so we need to be conservative and assume it isn't. 302 Slog.w(TAG, "Activity destroy timeout for " + r); 303 synchronized (mService) { 304 activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout"); 305 } 306 } break; 307 case STOP_TIMEOUT_MSG: { 308 ActivityRecord r = (ActivityRecord)msg.obj; 309 // We don't at this point know if the activity is fullscreen, 310 // so we need to be conservative and assume it isn't. 311 Slog.w(TAG, "Activity stop timeout for " + r); 312 synchronized (mService) { 313 if (r.isInHistory()) { 314 activityStoppedLocked(r, null, null, null); 315 } 316 } 317 } break; 318 case DESTROY_ACTIVITIES_MSG: { 319 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 320 synchronized (mService) { 321 destroyActivitiesLocked(args.mOwner, args.mReason); 322 } 323 } break; 324 case TRANSLUCENT_TIMEOUT_MSG: { 325 synchronized (mService) { 326 notifyActivityDrawnLocked(null); 327 } 328 } break; 329 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 330 synchronized (mService) { 331 final ActivityRecord r = getVisibleBehindActivity(); 332 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 333 if (r != null) { 334 mService.killAppAtUsersRequest(r.app, null); 335 } 336 } 337 } break; 338 } 339 } 340 } 341 342 int numActivities() { 343 int count = 0; 344 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 345 count += mTaskHistory.get(taskNdx).mActivities.size(); 346 } 347 return count; 348 } 349 350 int numTasks() { 351 return mTaskHistory.size(); 352 } 353 354 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer, 355 RecentTasks recentTasks) { 356 mActivityContainer = activityContainer; 357 mStackSupervisor = activityContainer.getOuter(); 358 mService = mStackSupervisor.mService; 359 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 360 mWindowManager = mService.mWindowManager; 361 mStackId = activityContainer.mStackId; 362 mCurrentUser = mService.mCurrentUserId; 363 mRecentTasks = recentTasks; 364 mOverrideConfig = Configuration.EMPTY; 365 } 366 367 boolean okToShowLocked(ActivityRecord r) { 368 return mStackSupervisor.isCurrentProfileLocked(r.userId) 369 || (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0; 370 } 371 372 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 373 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 374 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 375 if (r != null) { 376 return r; 377 } 378 } 379 return null; 380 } 381 382 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 383 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 384 final TaskRecord task = mTaskHistory.get(taskNdx); 385 final ArrayList<ActivityRecord> activities = task.mActivities; 386 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 387 ActivityRecord r = activities.get(activityNdx); 388 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 389 return r; 390 } 391 } 392 } 393 return null; 394 } 395 396 /** 397 * This is a simplified version of topRunningActivityLocked that provides a number of 398 * optional skip-over modes. It is intended for use with the ActivityController hook only. 399 * 400 * @param token If non-null, any history records matching this token will be skipped. 401 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 402 * 403 * @return Returns the HistoryRecord of the next activity on the stack. 404 */ 405 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 406 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 407 TaskRecord task = mTaskHistory.get(taskNdx); 408 if (task.taskId == taskId) { 409 continue; 410 } 411 ArrayList<ActivityRecord> activities = task.mActivities; 412 for (int i = activities.size() - 1; i >= 0; --i) { 413 final ActivityRecord r = activities.get(i); 414 // Note: the taskId check depends on real taskId fields being non-zero 415 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 416 return r; 417 } 418 } 419 } 420 return null; 421 } 422 423 final ActivityRecord topActivity() { 424 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 425 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 426 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 427 final ActivityRecord r = activities.get(activityNdx); 428 if (!r.finishing) { 429 return r; 430 } 431 } 432 } 433 return null; 434 } 435 436 final TaskRecord topTask() { 437 final int size = mTaskHistory.size(); 438 if (size > 0) { 439 return mTaskHistory.get(size - 1); 440 } 441 return null; 442 } 443 444 TaskRecord taskForIdLocked(int id) { 445 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 446 final TaskRecord task = mTaskHistory.get(taskNdx); 447 if (task.taskId == id) { 448 return task; 449 } 450 } 451 return null; 452 } 453 454 ActivityRecord isInStackLocked(IBinder token) { 455 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 456 return isInStackLocked(r); 457 } 458 459 ActivityRecord isInStackLocked(ActivityRecord r) { 460 if (r == null) { 461 return null; 462 } 463 final TaskRecord task = r.task; 464 if (task != null && task.stack != null 465 && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 466 if (task.stack != this) Slog.w(TAG, 467 "Illegal state! task does not point to stack it is in."); 468 return r; 469 } 470 return null; 471 } 472 473 final boolean updateLRUListLocked(ActivityRecord r) { 474 final boolean hadit = mLRUActivities.remove(r); 475 mLRUActivities.add(r); 476 return hadit; 477 } 478 479 final boolean isHomeStack() { 480 return mStackId == HOME_STACK_ID; 481 } 482 483 final boolean isOnHomeDisplay() { 484 return isAttached() && 485 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 486 } 487 488 final void moveToFront(String reason) { 489 if (isAttached()) { 490 final boolean homeStack = isHomeStack() 491 || (mActivityContainer.mParentActivity != null 492 && mActivityContainer.mParentActivity.isHomeActivity()); 493 ActivityStack lastFocusStack = null; 494 if (!homeStack) { 495 // Need to move this stack to the front before calling 496 // {@link ActivityStackSupervisor#moveHomeStack} below. 497 lastFocusStack = mStacks.get(mStacks.size() - 1); 498 mStacks.remove(this); 499 mStacks.add(this); 500 } 501 // TODO(multi-display): Focus stack currently adjusted in call to move home stack. 502 // Needs to also work if focus is moving to the non-home display. 503 if (isOnHomeDisplay()) { 504 mStackSupervisor.moveHomeStack(homeStack, reason, lastFocusStack); 505 } 506 final TaskRecord task = topTask(); 507 if (task != null) { 508 mWindowManager.moveTaskToTop(task.taskId); 509 } 510 } 511 } 512 513 final boolean isAttached() { 514 return mStacks != null; 515 } 516 517 /** 518 * Returns the top activity in any existing task matching the given 519 * Intent. Returns null if no such task is found. 520 */ 521 ActivityRecord findTaskLocked(ActivityRecord target) { 522 Intent intent = target.intent; 523 ActivityInfo info = target.info; 524 ComponentName cls = intent.getComponent(); 525 if (info.targetActivity != null) { 526 cls = new ComponentName(info.packageName, info.targetActivity); 527 } 528 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 529 boolean isDocument = intent != null & intent.isDocument(); 530 // If documentData is non-null then it must match the existing task data. 531 Uri documentData = isDocument ? intent.getData() : null; 532 533 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Looking for task of " + target + " in " + this); 534 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 535 final TaskRecord task = mTaskHistory.get(taskNdx); 536 if (task.voiceSession != null) { 537 // We never match voice sessions; those always run independently. 538 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": voice session"); 539 continue; 540 } 541 if (task.userId != userId) { 542 // Looking for a different task. 543 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": different user"); 544 continue; 545 } 546 final ActivityRecord r = task.getTopActivity(); 547 if (r == null || r.finishing || r.userId != userId || 548 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 549 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch root " + r); 550 continue; 551 } 552 553 final Intent taskIntent = task.intent; 554 final Intent affinityIntent = task.affinityIntent; 555 final boolean taskIsDocument; 556 final Uri taskDocumentData; 557 if (taskIntent != null && taskIntent.isDocument()) { 558 taskIsDocument = true; 559 taskDocumentData = taskIntent.getData(); 560 } else if (affinityIntent != null && affinityIntent.isDocument()) { 561 taskIsDocument = true; 562 taskDocumentData = affinityIntent.getData(); 563 } else { 564 taskIsDocument = false; 565 taskDocumentData = null; 566 } 567 568 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Comparing existing cls=" 569 + taskIntent.getComponent().flattenToShortString() 570 + "/aff=" + r.task.rootAffinity + " to new cls=" 571 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 572 if (!isDocument && !taskIsDocument && task.rootAffinity != null) { 573 if (task.rootAffinity.equals(target.taskAffinity)) { 574 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching affinity!"); 575 return r; 576 } 577 } else if (taskIntent != null && taskIntent.getComponent() != null && 578 taskIntent.getComponent().compareTo(cls) == 0 && 579 Objects.equals(documentData, taskDocumentData)) { 580 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); 581 //dump(); 582 if (DEBUG_TASKS) Slog.d(TAG_TASKS, 583 "For Intent " + intent + " bringing to top: " + r.intent); 584 return r; 585 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 586 affinityIntent.getComponent().compareTo(cls) == 0 && 587 Objects.equals(documentData, taskDocumentData)) { 588 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); 589 //dump(); 590 if (DEBUG_TASKS) Slog.d(TAG_TASKS, 591 "For Intent " + intent + " bringing to top: " + r.intent); 592 return r; 593 } else if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Not a match: " + task); 594 } 595 596 return null; 597 } 598 599 /** 600 * Returns the first activity (starting from the top of the stack) that 601 * is the same as the given activity. Returns null if no such activity 602 * is found. 603 */ 604 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 605 ComponentName cls = intent.getComponent(); 606 if (info.targetActivity != null) { 607 cls = new ComponentName(info.packageName, info.targetActivity); 608 } 609 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 610 611 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 612 final TaskRecord task = mTaskHistory.get(taskNdx); 613 final boolean notCurrentUserTask = 614 !mStackSupervisor.isCurrentProfileLocked(task.userId); 615 final ArrayList<ActivityRecord> activities = task.mActivities; 616 617 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 618 ActivityRecord r = activities.get(activityNdx); 619 if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) { 620 continue; 621 } 622 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 623 return r; 624 } 625 } 626 } 627 628 return null; 629 } 630 631 /* 632 * Move the activities around in the stack to bring a user to the foreground. 633 */ 634 final void switchUserLocked(int userId) { 635 if (mCurrentUser == userId) { 636 return; 637 } 638 mCurrentUser = userId; 639 640 // Move userId's tasks to the top. 641 int index = mTaskHistory.size(); 642 for (int i = 0; i < index; ) { 643 final TaskRecord task = mTaskHistory.get(i); 644 645 // NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is 646 // okay to show the activity when locked. 647 if (mStackSupervisor.isCurrentProfileLocked(task.userId) 648 || task.topRunningActivityLocked(null) != null) { 649 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() + 650 " moving " + task + " to top"); 651 mTaskHistory.remove(i); 652 mTaskHistory.add(task); 653 --index; 654 // Use same value for i. 655 } else { 656 ++i; 657 } 658 } 659 if (VALIDATE_TOKENS) { 660 validateAppTokensLocked(); 661 } 662 } 663 664 void minimalResumeActivityLocked(ActivityRecord r) { 665 r.state = ActivityState.RESUMED; 666 if (DEBUG_STATES) Slog.v(TAG_STATES, 667 "Moving to RESUMED: " + r + " (starting new instance)"); 668 r.stopped = false; 669 mResumedActivity = r; 670 r.task.touchActiveTime(); 671 mRecentTasks.addLocked(r.task); 672 completeResumeLocked(r); 673 mStackSupervisor.checkReadyForSleepLocked(); 674 setLaunchTime(r); 675 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 676 "Launch completed; removing icicle of " + r.icicle); 677 } 678 679 private void startLaunchTraces(String packageName) { 680 if (mFullyDrawnStartTime != 0) { 681 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 682 } 683 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0); 684 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 685 } 686 687 private void stopFullyDrawnTraceIfNeeded() { 688 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 689 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 690 mFullyDrawnStartTime = 0; 691 } 692 } 693 694 void setLaunchTime(ActivityRecord r) { 695 if (r.displayStartTime == 0) { 696 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 697 if (mLaunchStartTime == 0) { 698 startLaunchTraces(r.packageName); 699 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 700 } 701 } else if (mLaunchStartTime == 0) { 702 startLaunchTraces(r.packageName); 703 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 704 } 705 } 706 707 void clearLaunchTime(ActivityRecord r) { 708 // Make sure that there is no activity waiting for this to launch. 709 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 710 r.displayStartTime = r.fullyDrawnStartTime = 0; 711 } else { 712 mStackSupervisor.removeTimeoutsForActivityLocked(r); 713 mStackSupervisor.scheduleIdleTimeoutLocked(r); 714 } 715 } 716 717 void awakeFromSleepingLocked() { 718 // Ensure activities are no longer sleeping. 719 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 720 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 721 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 722 activities.get(activityNdx).setSleeping(false); 723 } 724 } 725 if (mPausingActivity != null) { 726 Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); 727 activityPausedLocked(mPausingActivity.appToken, true); 728 } 729 } 730 731 /** 732 * @return true if something must be done before going to sleep. 733 */ 734 boolean checkReadyForSleepLocked() { 735 if (mResumedActivity != null) { 736 // Still have something resumed; can't sleep until it is paused. 737 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity); 738 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 739 "Sleep => pause with userLeaving=false"); 740 startPausingLocked(false, true, false, false); 741 return true; 742 } 743 if (mPausingActivity != null) { 744 // Still waiting for something to pause; can't sleep yet. 745 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity); 746 return true; 747 } 748 749 if (hasVisibleBehindActivity()) { 750 // Stop visible behind activity before going to sleep. 751 final ActivityRecord r = mActivityContainer.mActivityDisplay.mVisibleBehindActivity; 752 mStackSupervisor.mStoppingActivities.add(r); 753 if (DEBUG_STATES) Slog.v(TAG_STATES, 754 "Sleep still waiting to stop visible behind " + r); 755 return true; 756 } 757 758 return false; 759 } 760 761 void goToSleep() { 762 ensureActivitiesVisibleLocked(null, 0); 763 764 // Make sure any stopped but visible activities are now sleeping. 765 // This ensures that the activity's onStop() is called. 766 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 767 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 768 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 769 final ActivityRecord r = activities.get(activityNdx); 770 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 771 r.setSleeping(true); 772 } 773 } 774 } 775 } 776 777 public final Bitmap screenshotActivities(ActivityRecord who) { 778 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivities: " + who); 779 if (who.noDisplay) { 780 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display"); 781 return null; 782 } 783 784 if (isHomeStack()) { 785 // This is an optimization -- since we never show Home or Recents within Recents itself, 786 // we can just go ahead and skip taking the screenshot if this is the home stack. 787 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack"); 788 return null; 789 } 790 791 int w = mService.mThumbnailWidth; 792 int h = mService.mThumbnailHeight; 793 if (w > 0) { 794 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot"); 795 return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, 796 w, h); 797 } 798 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 799 return null; 800 } 801 802 /** 803 * Start pausing the currently resumed activity. It is an error to call this if there 804 * is already an activity being paused or there is no resumed activity. 805 * 806 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 807 * @param uiSleeping True if this is happening with the user interface going to sleep (the 808 * screen turning off). 809 * @param resuming True if this is being called as part of resuming the top activity, so 810 * we shouldn't try to instigate a resume here. 811 * @param dontWait True if the caller does not want to wait for the pause to complete. If 812 * set to true, we will immediately complete the pause here before returning. 813 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 814 * it to tell us when it is done. 815 */ 816 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 817 boolean dontWait) { 818 if (mPausingActivity != null) { 819 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity 820 + " state=" + mPausingActivity.state); 821 if (!mService.isSleeping()) { 822 // Avoid recursion among check for sleep and complete pause during sleeping. 823 // Because activity will be paused immediately after resume, just let pause 824 // be completed by the order of activity paused from clients. 825 completePauseLocked(false); 826 } 827 } 828 ActivityRecord prev = mResumedActivity; 829 if (prev == null) { 830 if (!resuming) { 831 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 832 mStackSupervisor.resumeTopActivitiesLocked(); 833 } 834 return false; 835 } 836 837 if (mActivityContainer.mParentActivity == null) { 838 // Top level stack, not a child. Look for child stacks. 839 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 840 } 841 842 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev); 843 else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev); 844 mResumedActivity = null; 845 mPausingActivity = prev; 846 mLastPausedActivity = prev; 847 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 848 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 849 prev.state = ActivityState.PAUSING; 850 prev.task.touchActiveTime(); 851 clearLaunchTime(prev); 852 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 853 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 854 prev.updateThumbnailLocked(screenshotActivities(prev), null); 855 } 856 stopFullyDrawnTraceIfNeeded(); 857 858 mService.updateCpuStats(); 859 860 if (prev.app != null && prev.app.thread != null) { 861 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev); 862 try { 863 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 864 prev.userId, System.identityHashCode(prev), 865 prev.shortComponentName); 866 mService.updateUsageStats(prev, false); 867 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 868 userLeaving, prev.configChangeFlags, dontWait); 869 } catch (Exception e) { 870 // Ignore exception, if process died other code will cleanup. 871 Slog.w(TAG, "Exception thrown during pause", e); 872 mPausingActivity = null; 873 mLastPausedActivity = null; 874 mLastNoHistoryActivity = null; 875 } 876 } else { 877 mPausingActivity = null; 878 mLastPausedActivity = null; 879 mLastNoHistoryActivity = null; 880 } 881 882 // If we are not going to sleep, we want to ensure the device is 883 // awake until the next activity is started. 884 if (!uiSleeping && !mService.isSleepingOrShuttingDown()) { 885 mStackSupervisor.acquireLaunchWakelock(); 886 } 887 888 if (mPausingActivity != null) { 889 // Have the window manager pause its key dispatching until the new 890 // activity has started. If we're pausing the activity just because 891 // the screen is being turned off and the UI is sleeping, don't interrupt 892 // key dispatch; the same activity will pick it up again on wakeup. 893 if (!uiSleeping) { 894 prev.pauseKeyDispatchingLocked(); 895 } else if (DEBUG_PAUSE) { 896 Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off"); 897 } 898 899 if (dontWait) { 900 // If the caller said they don't want to wait for the pause, then complete 901 // the pause now. 902 completePauseLocked(false); 903 return false; 904 905 } else { 906 // Schedule a pause timeout in case the app doesn't respond. 907 // We don't give it much time because this directly impacts the 908 // responsiveness seen by the user. 909 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 910 msg.obj = prev; 911 prev.pauseTime = SystemClock.uptimeMillis(); 912 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 913 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete..."); 914 return true; 915 } 916 917 } else { 918 // This activity failed to schedule the 919 // pause, so just treat it as being paused now. 920 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next."); 921 if (!resuming) { 922 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 923 } 924 return false; 925 } 926 } 927 928 final void activityPausedLocked(IBinder token, boolean timeout) { 929 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, 930 "Activity paused: token=" + token + ", timeout=" + timeout); 931 932 final ActivityRecord r = isInStackLocked(token); 933 if (r != null) { 934 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 935 if (mPausingActivity == r) { 936 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r 937 + (timeout ? " (due to timeout)" : " (pause complete)")); 938 completePauseLocked(true); 939 } else { 940 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 941 r.userId, System.identityHashCode(r), r.shortComponentName, 942 mPausingActivity != null 943 ? mPausingActivity.shortComponentName : "(none)"); 944 if (r.finishing && r.state == ActivityState.PAUSING) { 945 if (DEBUG_PAUSE) Slog.v(TAG, 946 "Executing finish of failed to pause activity: " + r); 947 finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false); 948 } 949 } 950 } 951 } 952 953 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 954 PersistableBundle persistentState, CharSequence description) { 955 if (r.state != ActivityState.STOPPING) { 956 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 957 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 958 return; 959 } 960 if (persistentState != null) { 961 r.persistentState = persistentState; 962 mService.notifyTaskPersisterLocked(r.task, false); 963 } 964 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle); 965 if (icicle != null) { 966 // If icicle is null, this is happening due to a timeout, so we 967 // haven't really saved the state. 968 r.icicle = icicle; 969 r.haveState = true; 970 r.launchCount = 0; 971 r.updateThumbnailLocked(null, description); 972 } 973 if (!r.stopped) { 974 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)"); 975 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 976 r.stopped = true; 977 r.state = ActivityState.STOPPED; 978 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 979 mStackSupervisor.requestVisibleBehindLocked(r, false); 980 } 981 if (r.finishing) { 982 r.clearOptionsLocked(); 983 } else { 984 if (r.configDestroy) { 985 destroyActivityLocked(r, true, "stop-config"); 986 mStackSupervisor.resumeTopActivitiesLocked(); 987 } else { 988 mStackSupervisor.updatePreviousProcessLocked(r); 989 } 990 } 991 } 992 } 993 994 private void completePauseLocked(boolean resumeNext) { 995 ActivityRecord prev = mPausingActivity; 996 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev); 997 998 if (prev != null) { 999 prev.state = ActivityState.PAUSED; 1000 if (prev.finishing) { 1001 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev); 1002 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 1003 } else if (prev.app != null) { 1004 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending stop: " + prev); 1005 if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { 1006 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1007 "Complete pause, no longer waiting: " + prev); 1008 } 1009 if (prev.configDestroy) { 1010 // The previous is being paused because the configuration 1011 // is changing, which means it is actually stopping... 1012 // To juggle the fact that we are also starting a new 1013 // instance right now, we need to first completely stop 1014 // the current instance before starting the new one. 1015 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Destroying after pause: " + prev); 1016 destroyActivityLocked(prev, true, "pause-config"); 1017 } else if (!hasVisibleBehindActivity() || mService.isSleepingOrShuttingDown()) { 1018 // If we were visible then resumeTopActivities will release resources before 1019 // stopping. 1020 mStackSupervisor.mStoppingActivities.add(prev); 1021 if (mStackSupervisor.mStoppingActivities.size() > 3 || 1022 prev.frontOfTask && mTaskHistory.size() <= 1) { 1023 // If we already have a few activities waiting to stop, 1024 // then give up on things going idle and start clearing 1025 // them out. Or if r is the last of activity of the last task the stack 1026 // will be empty and must be cleared immediately. 1027 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "To many pending stops, forcing idle"); 1028 mStackSupervisor.scheduleIdleLocked(); 1029 } else { 1030 mStackSupervisor.checkReadyForSleepLocked(); 1031 } 1032 } 1033 } else { 1034 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev); 1035 prev = null; 1036 } 1037 // It is possible the activity was freezing the screen before it was paused. 1038 // In that case go ahead and remove the freeze this activity has on the screen 1039 // since it is no longer visible. 1040 prev.stopFreezingScreenLocked(true /*force*/); 1041 mPausingActivity = null; 1042 } 1043 1044 if (resumeNext) { 1045 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1046 if (!mService.isSleepingOrShuttingDown()) { 1047 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1048 } else { 1049 mStackSupervisor.checkReadyForSleepLocked(); 1050 ActivityRecord top = topStack.topRunningActivityLocked(null); 1051 if (top == null || (prev != null && top != prev)) { 1052 // If there are no more activities available to run, 1053 // do resume anyway to start something. Also if the top 1054 // activity on the stack is not the just paused activity, 1055 // we need to go ahead and resume it to ensure we complete 1056 // an in-flight app switch. 1057 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1058 } 1059 } 1060 } 1061 1062 if (prev != null) { 1063 prev.resumeKeyDispatchingLocked(); 1064 1065 if (prev.app != null && prev.cpuTimeAtResume > 0 1066 && mService.mBatteryStatsService.isOnBattery()) { 1067 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1068 - prev.cpuTimeAtResume; 1069 if (diff > 0) { 1070 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1071 synchronized (bsi) { 1072 BatteryStatsImpl.Uid.Proc ps = 1073 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1074 prev.info.packageName); 1075 if (ps != null) { 1076 ps.addForegroundTimeLocked(diff); 1077 } 1078 } 1079 } 1080 } 1081 prev.cpuTimeAtResume = 0; // reset it 1082 } 1083 1084 // Notfiy when the task stack has changed 1085 mService.notifyTaskStackChangedLocked(); 1086 } 1087 1088 /** 1089 * Once we know that we have asked an application to put an activity in 1090 * the resumed state (either by launching it or explicitly telling it), 1091 * this function updates the rest of our state to match that fact. 1092 */ 1093 private void completeResumeLocked(ActivityRecord next) { 1094 next.idle = false; 1095 next.results = null; 1096 next.newIntents = null; 1097 1098 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1099 ProcessRecord app = next.task.mActivities.get(0).app; 1100 if (app != null && app != mService.mHomeProcess) { 1101 mService.mHomeProcess = app; 1102 } 1103 } 1104 1105 if (next.nowVisible) { 1106 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1107 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1108 } 1109 1110 // schedule an idle timeout in case the app doesn't do it for us. 1111 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1112 1113 mStackSupervisor.reportResumedActivityLocked(next); 1114 1115 next.resumeKeyDispatchingLocked(); 1116 mNoAnimActivities.clear(); 1117 1118 // Mark the point when the activity is resuming 1119 // TODO: To be more accurate, the mark should be before the onCreate, 1120 // not after the onResume. But for subsequent starts, onResume is fine. 1121 if (next.app != null) { 1122 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1123 } else { 1124 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1125 } 1126 1127 next.returningOptions = null; 1128 1129 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) { 1130 // When resuming an activity, require it to call requestVisibleBehind() again. 1131 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null); 1132 } 1133 } 1134 1135 private void setVisible(ActivityRecord r, boolean visible) { 1136 r.visible = visible; 1137 mWindowManager.setAppVisibility(r.appToken, visible); 1138 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1139 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1140 ActivityContainer container = containers.get(containerNdx); 1141 container.setVisible(visible); 1142 } 1143 } 1144 1145 // Find the first visible activity above the passed activity and if it is translucent return it 1146 // otherwise return null; 1147 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1148 TaskRecord task = r.task; 1149 if (task == null) { 1150 return null; 1151 } 1152 1153 ActivityStack stack = task.stack; 1154 if (stack == null) { 1155 return null; 1156 } 1157 1158 int stackNdx = mStacks.indexOf(stack); 1159 1160 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1161 int taskNdx = tasks.indexOf(task); 1162 1163 ArrayList<ActivityRecord> activities = task.mActivities; 1164 int activityNdx = activities.indexOf(r) + 1; 1165 1166 final int numStacks = mStacks.size(); 1167 while (stackNdx < numStacks) { 1168 ActivityStack historyStack = mStacks.get(stackNdx); 1169 tasks = historyStack.mTaskHistory; 1170 final int numTasks = tasks.size(); 1171 while (taskNdx < numTasks) { 1172 activities = tasks.get(taskNdx).mActivities; 1173 final int numActivities = activities.size(); 1174 while (activityNdx < numActivities) { 1175 final ActivityRecord activity = activities.get(activityNdx); 1176 if (!activity.finishing) { 1177 return historyStack.mFullscreen && activity.fullscreen ? null : activity; 1178 } 1179 ++activityNdx; 1180 } 1181 activityNdx = 0; 1182 ++taskNdx; 1183 } 1184 taskNdx = 0; 1185 ++stackNdx; 1186 } 1187 1188 return null; 1189 } 1190 1191 private ActivityStack getNextVisibleStackLocked() { 1192 ArrayList<ActivityStack> stacks = mStacks; 1193 final ActivityRecord parent = mActivityContainer.mParentActivity; 1194 if (parent != null) { 1195 stacks = parent.task.stack.mStacks; 1196 } 1197 if (stacks != null) { 1198 for (int i = stacks.size() - 1; i >= 0; --i) { 1199 ActivityStack stack = stacks.get(i); 1200 if (stack != this && stack.isStackVisibleLocked()) { 1201 return stack; 1202 } 1203 } 1204 } 1205 return null; 1206 } 1207 1208 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1209 // If so, this stack is hidden, otherwise it is visible. 1210 private boolean isStackVisibleLocked() { 1211 if (!isAttached()) { 1212 return false; 1213 } 1214 1215 if (mStackSupervisor.isFrontStack(this)) { 1216 return true; 1217 } 1218 1219 /** 1220 * Start at the task above this one and go up, looking for a visible 1221 * fullscreen activity, or a translucent activity that requested the 1222 * wallpaper to be shown behind it. 1223 */ 1224 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1225 ActivityStack stack = mStacks.get(i); 1226 // stack above isn't full screen, so, we assume we're still visible. at some point 1227 // we should look at the stack bounds to see if we're occluded even if the stack 1228 // isn't fullscreen 1229 if (!stack.mFullscreen) { 1230 continue; 1231 } 1232 final ArrayList<TaskRecord> tasks = stack.getAllTasks(); 1233 for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) { 1234 final TaskRecord task = tasks.get(taskNdx); 1235 final ArrayList<ActivityRecord> activities = task.mActivities; 1236 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1237 final ActivityRecord r = activities.get(activityNdx); 1238 1239 // Conditions for an activity to obscure the stack we're 1240 // examining: 1241 // 1. Not Finishing AND Visible AND: 1242 // 2. Either: 1243 // - Full Screen Activity OR 1244 // - On top of Home and our stack is NOT home 1245 if (!r.finishing && r.visible && (r.fullscreen || 1246 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1247 return false; 1248 } 1249 } 1250 } 1251 } 1252 1253 return true; 1254 } 1255 1256 /** 1257 * Make sure that all activities that need to be visible (that is, they 1258 * currently can be seen by the user) actually are. 1259 */ 1260 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1261 ActivityRecord top = topRunningActivityLocked(null); 1262 if (top == null) { 1263 return; 1264 } 1265 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1266 "ensureActivitiesVisible behind " + top 1267 + " configChanges=0x" + Integer.toHexString(configChanges)); 1268 1269 if (mTranslucentActivityWaiting != top) { 1270 mUndrawnActivitiesBelowTopTranslucent.clear(); 1271 if (mTranslucentActivityWaiting != null) { 1272 // Call the callback with a timeout indication. 1273 notifyActivityDrawnLocked(null); 1274 mTranslucentActivityWaiting = null; 1275 } 1276 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1277 } 1278 1279 // If the top activity is not fullscreen, then we need to 1280 // make sure any activities under it are now visible. 1281 boolean aboveTop = true; 1282 boolean behindFullscreen = !isStackVisibleLocked(); 1283 boolean noStackActivityResumed = (isInStackLocked(starting) == null); 1284 1285 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1286 final TaskRecord task = mTaskHistory.get(taskNdx); 1287 final ArrayList<ActivityRecord> activities = task.mActivities; 1288 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1289 final ActivityRecord r = activities.get(activityNdx); 1290 if (r.finishing) { 1291 continue; 1292 } 1293 if (aboveTop && r != top) { 1294 continue; 1295 } 1296 aboveTop = false; 1297 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1298 // but must be drawn initially for the animation as though they were visible. 1299 if (!behindFullscreen || r.mLaunchTaskBehind) { 1300 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1301 "Make visible? " + r + " finishing=" + r.finishing 1302 + " state=" + r.state); 1303 1304 // First: if this is not the current activity being started, make 1305 // sure it matches the current configuration. 1306 if (r != starting) { 1307 ensureActivityConfigurationLocked(r, 0); 1308 } 1309 1310 if (r.app == null || r.app.thread == null) { 1311 // This activity needs to be visible, but isn't even running... 1312 // get it started and resume if no other stack in this stack is resumed. 1313 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1314 "Start and freeze screen for " + r); 1315 if (r != starting) { 1316 r.startFreezingScreenLocked(r.app, configChanges); 1317 } 1318 if (!r.visible || r.mLaunchTaskBehind) { 1319 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1320 "Starting and making visible: " + r); 1321 setVisible(r, true); 1322 } 1323 if (r != starting) { 1324 mStackSupervisor.startSpecificActivityLocked( 1325 r, noStackActivityResumed, false); 1326 if (activityNdx >= activities.size()) { 1327 // Record may be removed if its process needs to restart. 1328 activityNdx = activities.size() - 1; 1329 } else { 1330 noStackActivityResumed = false; 1331 } 1332 } 1333 1334 } else if (r.visible) { 1335 // If this activity is already visible, then there is nothing 1336 // else to do here. 1337 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1338 "Skipping: already visible at " + r); 1339 r.stopFreezingScreenLocked(false); 1340 try { 1341 if (r.returningOptions != null) { 1342 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1343 r.returningOptions); 1344 } 1345 } catch(RemoteException e) { 1346 } 1347 if (r.state == ActivityState.RESUMED) { 1348 noStackActivityResumed = false; 1349 } 1350 } else { 1351 // This activity is not currently visible, but is running. 1352 // Tell it to become visible. 1353 r.visible = true; 1354 if (r.state != ActivityState.RESUMED && r != starting) { 1355 // If this activity is paused, tell it 1356 // to now show its window. 1357 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1358 "Making visible and scheduling visibility: " + r); 1359 try { 1360 if (mTranslucentActivityWaiting != null) { 1361 r.updateOptionsLocked(r.returningOptions); 1362 mUndrawnActivitiesBelowTopTranslucent.add(r); 1363 } 1364 setVisible(r, true); 1365 r.sleeping = false; 1366 r.app.pendingUiClean = true; 1367 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1368 r.stopFreezingScreenLocked(false); 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 visibile: " 1373 + r.intent.getComponent(), e); 1374 } 1375 } 1376 } 1377 1378 // Aggregate current change flags. 1379 configChanges |= r.configChangeFlags; 1380 1381 if (r.fullscreen) { 1382 // At this point, nothing else needs to be shown 1383 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r); 1384 behindFullscreen = true; 1385 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1386 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r); 1387 behindFullscreen = true; 1388 } 1389 } else { 1390 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1391 "Make invisible? " + r + " finishing=" + r.finishing 1392 + " state=" + r.state + " behindFullscreen=" + behindFullscreen); 1393 // Now for any activities that aren't visible to the user, make 1394 // sure they no longer are keeping the screen frozen. 1395 if (r.visible) { 1396 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r); 1397 try { 1398 setVisible(r, false); 1399 switch (r.state) { 1400 case STOPPING: 1401 case STOPPED: 1402 if (r.app != null && r.app.thread != null) { 1403 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1404 "Scheduling invisibility: " + r); 1405 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1406 } 1407 break; 1408 1409 case INITIALIZING: 1410 case RESUMED: 1411 case PAUSING: 1412 case PAUSED: 1413 // This case created for transitioning activities from 1414 // translucent to opaque {@link Activity#convertToOpaque}. 1415 if (getVisibleBehindActivity() == r) { 1416 releaseBackgroundResources(r); 1417 } else { 1418 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1419 mStackSupervisor.mStoppingActivities.add(r); 1420 } 1421 mStackSupervisor.scheduleIdleLocked(); 1422 } 1423 break; 1424 1425 default: 1426 break; 1427 } 1428 } catch (Exception e) { 1429 // Just skip on any failure; we'll make it 1430 // visible when it next restarts. 1431 Slog.w(TAG, "Exception thrown making hidden: " 1432 + r.intent.getComponent(), e); 1433 } 1434 } else { 1435 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r); 1436 } 1437 } 1438 } 1439 } 1440 1441 if (mTranslucentActivityWaiting != null && 1442 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1443 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1444 notifyActivityDrawnLocked(null); 1445 } 1446 } 1447 1448 void convertActivityToTranslucent(ActivityRecord r) { 1449 mTranslucentActivityWaiting = r; 1450 mUndrawnActivitiesBelowTopTranslucent.clear(); 1451 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1452 } 1453 1454 void clearOtherAppTimeTrackers(AppTimeTracker except) { 1455 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1456 final TaskRecord task = mTaskHistory.get(taskNdx); 1457 final ArrayList<ActivityRecord> activities = task.mActivities; 1458 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1459 final ActivityRecord r = activities.get(activityNdx); 1460 if ( r.appTimeTracker != except) { 1461 r.appTimeTracker = null; 1462 } 1463 } 1464 } 1465 } 1466 1467 /** 1468 * Called as activities below the top translucent activity are redrawn. When the last one is 1469 * redrawn notify the top activity by calling 1470 * {@link Activity#onTranslucentConversionComplete}. 1471 * 1472 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1473 * occurred and the activity will be notified immediately. 1474 */ 1475 void notifyActivityDrawnLocked(ActivityRecord r) { 1476 mActivityContainer.setDrawn(); 1477 if ((r == null) 1478 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1479 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1480 // The last undrawn activity below the top has just been drawn. If there is an 1481 // opaque activity at the top, notify it that it can become translucent safely now. 1482 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1483 mTranslucentActivityWaiting = null; 1484 mUndrawnActivitiesBelowTopTranslucent.clear(); 1485 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1486 1487 if (waitingActivity != null) { 1488 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1489 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1490 try { 1491 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1492 waitingActivity.appToken, r != null); 1493 } catch (RemoteException e) { 1494 } 1495 } 1496 } 1497 } 1498 } 1499 1500 /** If any activities below the top running one are in the INITIALIZING state and they have a 1501 * starting window displayed then remove that starting window. It is possible that the activity 1502 * in this state will never resumed in which case that starting window will be orphaned. */ 1503 void cancelInitializingActivities() { 1504 final ActivityRecord topActivity = topRunningActivityLocked(null); 1505 boolean aboveTop = true; 1506 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1507 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1508 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1509 final ActivityRecord r = activities.get(activityNdx); 1510 if (aboveTop) { 1511 if (r == topActivity) { 1512 aboveTop = false; 1513 } 1514 continue; 1515 } 1516 1517 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1518 if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, 1519 "Found orphaned starting window " + r); 1520 r.mStartingWindowShown = false; 1521 mWindowManager.removeAppStartingWindow(r.appToken); 1522 } 1523 } 1524 } 1525 } 1526 1527 /** 1528 * Ensure that the top activity in the stack is resumed. 1529 * 1530 * @param prev The previously resumed activity, for when in the process 1531 * of pausing; can be null to call from elsewhere. 1532 * 1533 * @return Returns true if something is being resumed, or false if 1534 * nothing happened. 1535 */ 1536 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1537 return resumeTopActivityLocked(prev, null); 1538 } 1539 1540 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1541 if (mStackSupervisor.inResumeTopActivity) { 1542 // Don't even start recursing. 1543 return false; 1544 } 1545 1546 boolean result = false; 1547 try { 1548 // Protect against recursion. 1549 mStackSupervisor.inResumeTopActivity = true; 1550 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 1551 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 1552 mService.updateSleepIfNeededLocked(); 1553 } 1554 result = resumeTopActivityInnerLocked(prev, options); 1555 } finally { 1556 mStackSupervisor.inResumeTopActivity = false; 1557 } 1558 return result; 1559 } 1560 1561 private boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) { 1562 if (DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1563 1564 if (!mService.mBooting && !mService.mBooted) { 1565 // Not ready yet! 1566 return false; 1567 } 1568 1569 ActivityRecord parent = mActivityContainer.mParentActivity; 1570 if ((parent != null && parent.state != ActivityState.RESUMED) || 1571 !mActivityContainer.isAttachedLocked()) { 1572 // Do not resume this stack if its parent is not resumed. 1573 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1574 return false; 1575 } 1576 1577 cancelInitializingActivities(); 1578 1579 // Find the first activity that is not finishing. 1580 final ActivityRecord next = topRunningActivityLocked(null); 1581 1582 // Remember how we'll process this pause/resume situation, and ensure 1583 // that the state is reset however we wind up proceeding. 1584 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1585 mStackSupervisor.mUserLeaving = false; 1586 1587 final TaskRecord prevTask = prev != null ? prev.task : null; 1588 if (next == null) { 1589 // There are no more activities! 1590 final String reason = "noMoreActivities"; 1591 if (!mFullscreen) { 1592 // Try to move focus to the next visible stack with a running activity if this 1593 // stack is not covering the entire screen. 1594 final ActivityStack stack = getNextVisibleStackLocked(); 1595 if (adjustFocusToNextVisibleStackLocked(stack, reason)) { 1596 return mStackSupervisor.resumeTopActivitiesLocked(stack, prev, null); 1597 } 1598 } 1599 // Let's just start up the Launcher... 1600 ActivityOptions.abort(options); 1601 if (DEBUG_STATES) Slog.d(TAG_STATES, 1602 "resumeTopActivityLocked: No more activities go home"); 1603 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1604 // Only resume home if on home display 1605 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1606 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1607 return isOnHomeDisplay() && 1608 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); 1609 } 1610 1611 next.delayedResume = false; 1612 1613 // If the top activity is the resumed one, nothing to do. 1614 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1615 mStackSupervisor.allResumedActivitiesComplete()) { 1616 // Make sure we have executed any pending transitions, since there 1617 // should be nothing left to do at this point. 1618 mWindowManager.executeAppTransition(); 1619 mNoAnimActivities.clear(); 1620 ActivityOptions.abort(options); 1621 if (DEBUG_STATES) Slog.d(TAG_STATES, 1622 "resumeTopActivityLocked: Top activity resumed " + next); 1623 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1624 return false; 1625 } 1626 1627 final TaskRecord nextTask = next.task; 1628 if (prevTask != null && prevTask.stack == this && 1629 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1630 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1631 if (prevTask == nextTask) { 1632 prevTask.setFrontOfTask(); 1633 } else if (prevTask != topTask()) { 1634 // This task is going away but it was supposed to return to the home stack. 1635 // Now the task above it has to return to the home task instead. 1636 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1637 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1638 } else if (!isOnHomeDisplay()) { 1639 return false; 1640 } else if (!isHomeStack()){ 1641 if (DEBUG_STATES) Slog.d(TAG_STATES, 1642 "resumeTopActivityLocked: Launching home next"); 1643 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1644 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1645 return isOnHomeDisplay() && 1646 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); 1647 } 1648 } 1649 1650 // If we are sleeping, and there is no resumed activity, and the top 1651 // activity is paused, well that is the state we want. 1652 if (mService.isSleepingOrShuttingDown() 1653 && mLastPausedActivity == next 1654 && mStackSupervisor.allPausedActivitiesComplete()) { 1655 // Make sure we have executed any pending transitions, since there 1656 // should be nothing left to do at this point. 1657 mWindowManager.executeAppTransition(); 1658 mNoAnimActivities.clear(); 1659 ActivityOptions.abort(options); 1660 if (DEBUG_STATES) Slog.d(TAG_STATES, 1661 "resumeTopActivityLocked: Going to sleep and all paused"); 1662 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1663 return false; 1664 } 1665 1666 // Make sure that the user who owns this activity is started. If not, 1667 // we will just leave it as is because someone should be bringing 1668 // another user's activities to the top of the stack. 1669 if (mService.mStartedUsers.get(next.userId) == null) { 1670 Slog.w(TAG, "Skipping resume of top activity " + next 1671 + ": user " + next.userId + " is stopped"); 1672 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1673 return false; 1674 } 1675 1676 // The activity may be waiting for stop, but that is no longer 1677 // appropriate for it. 1678 mStackSupervisor.mStoppingActivities.remove(next); 1679 mStackSupervisor.mGoingToSleepActivities.remove(next); 1680 next.sleeping = false; 1681 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1682 1683 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next); 1684 1685 // If we are currently pausing an activity, then don't do anything 1686 // until that is done. 1687 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1688 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE, 1689 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1690 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1691 return false; 1692 } 1693 1694 // Okay we are now going to start a switch, to 'next'. We may first 1695 // have to pause the current activity, but this is an important point 1696 // where we have decided to go to 'next' so keep track of that. 1697 // XXX "App Redirected" dialog is getting too many false positives 1698 // at this point, so turn off for now. 1699 if (false) { 1700 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1701 long now = SystemClock.uptimeMillis(); 1702 final boolean inTime = mLastStartedActivity.startTime != 0 1703 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1704 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1705 final int nextUid = next.info.applicationInfo.uid; 1706 if (inTime && lastUid != nextUid 1707 && lastUid != next.launchedFromUid 1708 && mService.checkPermission( 1709 android.Manifest.permission.STOP_APP_SWITCHES, 1710 -1, next.launchedFromUid) 1711 != PackageManager.PERMISSION_GRANTED) { 1712 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1713 } else { 1714 next.startTime = now; 1715 mLastStartedActivity = next; 1716 } 1717 } else { 1718 next.startTime = SystemClock.uptimeMillis(); 1719 mLastStartedActivity = next; 1720 } 1721 } 1722 1723 mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); 1724 1725 // We need to start pausing the current activity so the top one 1726 // can be resumed... 1727 boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0; 1728 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 1729 if (mResumedActivity != null) { 1730 if (DEBUG_STATES) Slog.d(TAG_STATES, 1731 "resumeTopActivityLocked: Pausing " + mResumedActivity); 1732 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 1733 } 1734 if (pausing) { 1735 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES, 1736 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1737 // At this point we want to put the upcoming activity's process 1738 // at the top of the LRU list, since we know we will be needing it 1739 // very soon and it would be a waste to let it get killed if it 1740 // happens to be sitting towards the end. 1741 if (next.app != null && next.app.thread != null) { 1742 mService.updateLruProcessLocked(next.app, true, null); 1743 } 1744 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1745 return true; 1746 } 1747 1748 // If the most recent activity was noHistory but was only stopped rather 1749 // than stopped+finished because the device went to sleep, we need to make 1750 // sure to finish it as we're making a new activity topmost. 1751 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1752 !mLastNoHistoryActivity.finishing) { 1753 if (DEBUG_STATES) Slog.d(TAG_STATES, 1754 "no-history finish of " + mLastNoHistoryActivity + " on new resume"); 1755 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1756 null, "resume-no-history", false); 1757 mLastNoHistoryActivity = null; 1758 } 1759 1760 if (prev != null && prev != next) { 1761 if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1762 && next != null && !next.nowVisible) { 1763 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1764 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 1765 "Resuming top, waiting visible to hide: " + prev); 1766 } else { 1767 // The next activity is already visible, so hide the previous 1768 // activity's windows right now so we can show the new one ASAP. 1769 // We only do this if the previous is finishing, which should mean 1770 // it is on top of the one being resumed so hiding it quickly 1771 // is good. Otherwise, we want to do the normal route of allowing 1772 // the resumed activity to be shown so we can decide if the 1773 // previous should actually be hidden depending on whether the 1774 // new one is found to be full-screen or not. 1775 if (prev.finishing) { 1776 mWindowManager.setAppVisibility(prev.appToken, false); 1777 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 1778 "Not waiting for visible to hide: " + prev + ", waitingVisible=" 1779 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1780 + ", nowVisible=" + next.nowVisible); 1781 } else { 1782 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 1783 "Previous already visible but still waiting to hide: " + prev 1784 + ", waitingVisible=" 1785 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1786 + ", nowVisible=" + next.nowVisible); 1787 } 1788 } 1789 } 1790 1791 // Launching this app's activity, make sure the app is no longer 1792 // considered stopped. 1793 try { 1794 AppGlobals.getPackageManager().setPackageStoppedState( 1795 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1796 } catch (RemoteException e1) { 1797 } catch (IllegalArgumentException e) { 1798 Slog.w(TAG, "Failed trying to unstop package " 1799 + next.packageName + ": " + e); 1800 } 1801 1802 // We are starting up the next activity, so tell the window manager 1803 // that the previous one will be hidden soon. This way it can know 1804 // to ignore it when computing the desired screen orientation. 1805 boolean anim = true; 1806 if (prev != null) { 1807 if (prev.finishing) { 1808 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 1809 "Prepare close transition: prev=" + prev); 1810 if (mNoAnimActivities.contains(prev)) { 1811 anim = false; 1812 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1813 } else { 1814 mWindowManager.prepareAppTransition(prev.task == next.task 1815 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1816 : AppTransition.TRANSIT_TASK_CLOSE, false); 1817 } 1818 mWindowManager.setAppWillBeHidden(prev.appToken); 1819 mWindowManager.setAppVisibility(prev.appToken, false); 1820 } else { 1821 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 1822 "Prepare open transition: prev=" + prev); 1823 if (mNoAnimActivities.contains(next)) { 1824 anim = false; 1825 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1826 } else { 1827 mWindowManager.prepareAppTransition(prev.task == next.task 1828 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1829 : next.mLaunchTaskBehind 1830 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1831 : AppTransition.TRANSIT_TASK_OPEN, false); 1832 } 1833 } 1834 if (false) { 1835 mWindowManager.setAppWillBeHidden(prev.appToken); 1836 mWindowManager.setAppVisibility(prev.appToken, false); 1837 } 1838 } else { 1839 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous"); 1840 if (mNoAnimActivities.contains(next)) { 1841 anim = false; 1842 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1843 } else { 1844 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1845 } 1846 } 1847 1848 Bundle resumeAnimOptions = null; 1849 if (anim) { 1850 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1851 if (opts != null) { 1852 resumeAnimOptions = opts.toBundle(); 1853 } 1854 next.applyOptionsLocked(); 1855 } else { 1856 next.clearOptionsLocked(); 1857 } 1858 1859 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1860 if (next.app != null && next.app.thread != null) { 1861 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next); 1862 1863 // This activity is now becoming visible. 1864 mWindowManager.setAppVisibility(next.appToken, true); 1865 1866 // schedule launch ticks to collect information about slow apps. 1867 next.startLaunchTickingLocked(); 1868 1869 ActivityRecord lastResumedActivity = 1870 lastStack == null ? null :lastStack.mResumedActivity; 1871 ActivityState lastState = next.state; 1872 1873 mService.updateCpuStats(); 1874 1875 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)"); 1876 next.state = ActivityState.RESUMED; 1877 mResumedActivity = next; 1878 next.task.touchActiveTime(); 1879 mRecentTasks.addLocked(next.task); 1880 mService.updateLruProcessLocked(next.app, true, null); 1881 updateLRUListLocked(next); 1882 mService.updateOomAdjLocked(); 1883 1884 // Have the window manager re-evaluate the orientation of 1885 // the screen based on the new activity order. 1886 boolean notUpdated = true; 1887 if (mStackSupervisor.isFrontStack(this)) { 1888 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1889 mService.mConfiguration, 1890 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1891 if (config != null) { 1892 next.frozenBeforeDestroy = true; 1893 } 1894 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1895 } 1896 1897 if (notUpdated) { 1898 // The configuration update wasn't able to keep the existing 1899 // instance of the activity, and instead started a new one. 1900 // We should be all done, but let's just make sure our activity 1901 // is still at the top and schedule another run if something 1902 // weird happened. 1903 ActivityRecord nextNext = topRunningActivityLocked(null); 1904 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES, 1905 "Activity config changed during resume: " + next 1906 + ", new next: " + nextNext); 1907 if (nextNext != next) { 1908 // Do over! 1909 mStackSupervisor.scheduleResumeTopActivities(); 1910 } 1911 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1912 mNoAnimActivities.clear(); 1913 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1914 return true; 1915 } 1916 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1917 return false; 1918 } 1919 1920 try { 1921 // Deliver all pending results. 1922 ArrayList<ResultInfo> a = next.results; 1923 if (a != null) { 1924 final int N = a.size(); 1925 if (!next.finishing && N > 0) { 1926 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, 1927 "Delivering results to " + next + ": " + a); 1928 next.app.thread.scheduleSendResult(next.appToken, a); 1929 } 1930 } 1931 1932 if (next.newIntents != null) { 1933 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1934 } 1935 1936 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, 1937 System.identityHashCode(next), next.task.taskId, next.shortComponentName); 1938 1939 next.sleeping = false; 1940 mService.showAskCompatModeDialogLocked(next); 1941 next.app.pendingUiClean = true; 1942 next.app.forceProcessStateUpTo(mService.mTopProcessState); 1943 next.clearOptionsLocked(); 1944 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1945 mService.isNextTransitionForward(), resumeAnimOptions); 1946 1947 mStackSupervisor.checkReadyForSleepLocked(); 1948 1949 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next); 1950 } catch (Exception e) { 1951 // Whoops, need to restart this activity! 1952 if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to " 1953 + lastState + ": " + next); 1954 next.state = lastState; 1955 if (lastStack != null) { 1956 lastStack.mResumedActivity = lastResumedActivity; 1957 } 1958 Slog.i(TAG, "Restarting because process died: " + next); 1959 if (!next.hasBeenLaunched) { 1960 next.hasBeenLaunched = true; 1961 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1962 mStackSupervisor.isFrontStack(lastStack)) { 1963 mWindowManager.setAppStartingWindow( 1964 next.appToken, next.packageName, next.theme, 1965 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1966 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1967 next.windowFlags, null, true); 1968 } 1969 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1970 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1971 return true; 1972 } 1973 1974 // From this point on, if something goes wrong there is no way 1975 // to recover the activity. 1976 try { 1977 next.visible = true; 1978 completeResumeLocked(next); 1979 } catch (Exception e) { 1980 // If any exception gets thrown, toss away this 1981 // activity and try the next one. 1982 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1983 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1984 "resume-exception", true); 1985 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1986 return true; 1987 } 1988 next.stopped = false; 1989 1990 } else { 1991 // Whoops, need to restart this activity! 1992 if (!next.hasBeenLaunched) { 1993 next.hasBeenLaunched = true; 1994 } else { 1995 if (SHOW_APP_STARTING_PREVIEW) { 1996 mWindowManager.setAppStartingWindow( 1997 next.appToken, next.packageName, next.theme, 1998 mService.compatibilityInfoForPackageLocked( 1999 next.info.applicationInfo), 2000 next.nonLocalizedLabel, 2001 next.labelRes, next.icon, next.logo, next.windowFlags, 2002 null, true); 2003 } 2004 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next); 2005 } 2006 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next); 2007 mStackSupervisor.startSpecificActivityLocked(next, true, true); 2008 } 2009 2010 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2011 return true; 2012 } 2013 2014 private TaskRecord getNextTask(TaskRecord targetTask) { 2015 final int index = mTaskHistory.indexOf(targetTask); 2016 if (index >= 0) { 2017 final int numTasks = mTaskHistory.size(); 2018 for (int i = index + 1; i < numTasks; ++i) { 2019 TaskRecord task = mTaskHistory.get(i); 2020 if (task.userId == targetTask.userId) { 2021 return task; 2022 } 2023 } 2024 } 2025 return null; 2026 } 2027 2028 private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) { 2029 // If the moving task is over home stack, transfer its return type to next task 2030 if (task.isOverHomeStack()) { 2031 final TaskRecord nextTask = getNextTask(task); 2032 if (nextTask != null) { 2033 nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); 2034 } 2035 } 2036 2037 // If this is being moved to the top by another activity or being launched from the home 2038 // activity, set mTaskToReturnTo accordingly. 2039 if (isOnHomeDisplay()) { 2040 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2041 final boolean fromHome = lastStack.isHomeStack(); 2042 if (!isHomeStack() && (fromHome || topTask() != task)) { 2043 task.setTaskToReturnTo(fromHome 2044 ? lastStack.topTask() == null 2045 ? HOME_ACTIVITY_TYPE 2046 : lastStack.topTask().taskType 2047 : APPLICATION_ACTIVITY_TYPE); 2048 } 2049 } else { 2050 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 2051 } 2052 2053 mTaskHistory.remove(task); 2054 // Now put task at top. 2055 int taskNdx = mTaskHistory.size(); 2056 final boolean notShownWhenLocked = 2057 (newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) 2058 || (newActivity == null && task.topRunningActivityLocked(null) == null); 2059 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) { 2060 // Put non-current user tasks below current user tasks. 2061 while (--taskNdx >= 0) { 2062 final TaskRecord tmpTask = mTaskHistory.get(taskNdx); 2063 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2064 || tmpTask.topRunningActivityLocked(null) == null) { 2065 break; 2066 } 2067 } 2068 ++taskNdx; 2069 } 2070 mTaskHistory.add(taskNdx, task); 2071 updateTaskMovement(task, true); 2072 } 2073 2074 final void startActivityLocked(ActivityRecord r, boolean newTask, 2075 boolean doResume, boolean keepCurTransition, Bundle options) { 2076 TaskRecord rTask = r.task; 2077 final int taskId = rTask.taskId; 2078 // mLaunchTaskBehind tasks get placed at the back of the task stack. 2079 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 2080 // Last activity in task had been removed or ActivityManagerService is reusing task. 2081 // Insert or replace. 2082 // Might not even be in. 2083 insertTaskAtTop(rTask, r); 2084 mWindowManager.moveTaskToTop(taskId); 2085 } 2086 TaskRecord task = null; 2087 if (!newTask) { 2088 // If starting in an existing task, find where that is... 2089 boolean startIt = true; 2090 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2091 task = mTaskHistory.get(taskNdx); 2092 if (task.getTopActivity() == null) { 2093 // All activities in task are finishing. 2094 continue; 2095 } 2096 if (task == r.task) { 2097 // Here it is! Now, if this is not yet visible to the 2098 // user, then just add it without starting; it will 2099 // get started when the user navigates back to it. 2100 if (!startIt) { 2101 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 2102 + task, new RuntimeException("here").fillInStackTrace()); 2103 task.addActivityToTop(r); 2104 r.putInHistory(); 2105 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2106 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2107 (r.info.flags & ActivityInfo.FLAG_SHOW_FOR_ALL_USERS) != 0, 2108 r.userId, r.info.configChanges, task.voiceSession != null, 2109 r.mLaunchTaskBehind); 2110 if (VALIDATE_TOKENS) { 2111 validateAppTokensLocked(); 2112 } 2113 ActivityOptions.abort(options); 2114 return; 2115 } 2116 break; 2117 } else if (task.numFullscreen > 0) { 2118 startIt = false; 2119 } 2120 } 2121 } 2122 2123 // Place a new activity at top of stack, so it is next to interact 2124 // with the user. 2125 2126 // If we are not placing the new activity frontmost, we do not want 2127 // to deliver the onUserLeaving callback to the actual frontmost 2128 // activity 2129 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2130 mStackSupervisor.mUserLeaving = false; 2131 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 2132 "startActivity() behind front, mUserLeaving=false"); 2133 } 2134 2135 task = r.task; 2136 2137 // Slot the activity into the history stack and proceed 2138 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2139 new RuntimeException("here").fillInStackTrace()); 2140 task.addActivityToTop(r); 2141 task.setFrontOfTask(); 2142 2143 r.putInHistory(); 2144 if (!isHomeStack() || numActivities() > 0) { 2145 // We want to show the starting preview window if we are 2146 // switching to a new task, or the next activity's process is 2147 // not currently running. 2148 boolean showStartingIcon = newTask; 2149 ProcessRecord proc = r.app; 2150 if (proc == null) { 2151 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2152 } 2153 if (proc == null || proc.thread == null) { 2154 showStartingIcon = true; 2155 } 2156 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2157 "Prepare open transition: starting " + r); 2158 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2159 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2160 mNoAnimActivities.add(r); 2161 } else { 2162 mWindowManager.prepareAppTransition(newTask 2163 ? r.mLaunchTaskBehind 2164 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2165 : AppTransition.TRANSIT_TASK_OPEN 2166 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2167 mNoAnimActivities.remove(r); 2168 } 2169 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2170 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2171 (r.info.flags & ActivityInfo.FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, 2172 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2173 boolean doShow = true; 2174 if (newTask) { 2175 // Even though this activity is starting fresh, we still need 2176 // to reset it to make sure we apply affinities to move any 2177 // existing activities from other tasks in to it. 2178 // If the caller has requested that the target task be 2179 // reset, then do so. 2180 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2181 resetTaskIfNeededLocked(r, r); 2182 doShow = topRunningNonDelayedActivityLocked(null) == r; 2183 } 2184 } else if (options != null && new ActivityOptions(options).getAnimationType() 2185 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2186 doShow = false; 2187 } 2188 if (r.mLaunchTaskBehind) { 2189 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2190 // tell WindowManager that r is visible even though it is at the back of the stack. 2191 mWindowManager.setAppVisibility(r.appToken, true); 2192 ensureActivitiesVisibleLocked(null, 0); 2193 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2194 // Figure out if we are transitioning from another activity that is 2195 // "has the same starting icon" as the next one. This allows the 2196 // window manager to keep the previous window it had previously 2197 // created, if it still had one. 2198 ActivityRecord prev = mResumedActivity; 2199 if (prev != null) { 2200 // We don't want to reuse the previous starting preview if: 2201 // (1) The current activity is in a different task. 2202 if (prev.task != r.task) { 2203 prev = null; 2204 } 2205 // (2) The current activity is already displayed. 2206 else if (prev.nowVisible) { 2207 prev = null; 2208 } 2209 } 2210 mWindowManager.setAppStartingWindow( 2211 r.appToken, r.packageName, r.theme, 2212 mService.compatibilityInfoForPackageLocked( 2213 r.info.applicationInfo), r.nonLocalizedLabel, 2214 r.labelRes, r.icon, r.logo, r.windowFlags, 2215 prev != null ? prev.appToken : null, showStartingIcon); 2216 r.mStartingWindowShown = true; 2217 } 2218 } else { 2219 // If this is the first activity, don't do any fancy animations, 2220 // because there is nothing for it to animate on top of. 2221 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2222 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2223 (r.info.flags & ActivityInfo.FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, 2224 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2225 ActivityOptions.abort(options); 2226 options = null; 2227 } 2228 if (VALIDATE_TOKENS) { 2229 validateAppTokensLocked(); 2230 } 2231 2232 if (doResume) { 2233 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2234 } 2235 } 2236 2237 final void validateAppTokensLocked() { 2238 mValidateAppTokens.clear(); 2239 mValidateAppTokens.ensureCapacity(numActivities()); 2240 final int numTasks = mTaskHistory.size(); 2241 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2242 TaskRecord task = mTaskHistory.get(taskNdx); 2243 final ArrayList<ActivityRecord> activities = task.mActivities; 2244 if (activities.isEmpty()) { 2245 continue; 2246 } 2247 TaskGroup group = new TaskGroup(); 2248 group.taskId = task.taskId; 2249 mValidateAppTokens.add(group); 2250 final int numActivities = activities.size(); 2251 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2252 final ActivityRecord r = activities.get(activityNdx); 2253 group.tokens.add(r.appToken); 2254 } 2255 } 2256 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2257 } 2258 2259 /** 2260 * Perform a reset of the given task, if needed as part of launching it. 2261 * Returns the new HistoryRecord at the top of the task. 2262 */ 2263 /** 2264 * Helper method for #resetTaskIfNeededLocked. 2265 * We are inside of the task being reset... we'll either finish this activity, push it out 2266 * for another task, or leave it as-is. 2267 * @param task The task containing the Activity (taskTop) that might be reset. 2268 * @param forceReset 2269 * @return An ActivityOptions that needs to be processed. 2270 */ 2271 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2272 ActivityOptions topOptions = null; 2273 2274 int replyChainEnd = -1; 2275 boolean canMoveOptions = true; 2276 2277 // We only do this for activities that are not the root of the task (since if we finish 2278 // the root, we may no longer have the task!). 2279 final ArrayList<ActivityRecord> activities = task.mActivities; 2280 final int numActivities = activities.size(); 2281 final int rootActivityNdx = task.findEffectiveRootIndex(); 2282 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2283 ActivityRecord target = activities.get(i); 2284 if (target.frontOfTask) 2285 break; 2286 2287 final int flags = target.info.flags; 2288 final boolean finishOnTaskLaunch = 2289 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2290 final boolean allowTaskReparenting = 2291 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2292 final boolean clearWhenTaskReset = 2293 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2294 2295 if (!finishOnTaskLaunch 2296 && !clearWhenTaskReset 2297 && target.resultTo != null) { 2298 // If this activity is sending a reply to a previous 2299 // activity, we can't do anything with it now until 2300 // we reach the start of the reply chain. 2301 // XXX note that we are assuming the result is always 2302 // to the previous activity, which is almost always 2303 // the case but we really shouldn't count on. 2304 if (replyChainEnd < 0) { 2305 replyChainEnd = i; 2306 } 2307 } else if (!finishOnTaskLaunch 2308 && !clearWhenTaskReset 2309 && allowTaskReparenting 2310 && target.taskAffinity != null 2311 && !target.taskAffinity.equals(task.affinity)) { 2312 // If this activity has an affinity for another 2313 // task, then we need to move it out of here. We will 2314 // move it as far out of the way as possible, to the 2315 // bottom of the activity stack. This also keeps it 2316 // correctly ordered with any activities we previously 2317 // moved. 2318 final TaskRecord targetTask; 2319 final ActivityRecord bottom = 2320 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2321 mTaskHistory.get(0).mActivities.get(0) : null; 2322 if (bottom != null && target.taskAffinity != null 2323 && target.taskAffinity.equals(bottom.task.affinity)) { 2324 // If the activity currently at the bottom has the 2325 // same task affinity as the one we are moving, 2326 // then merge it into the same task. 2327 targetTask = bottom.task; 2328 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2329 + " out to bottom task " + bottom.task); 2330 } else { 2331 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2332 null, null, null, false); 2333 targetTask.affinityIntent = target.intent; 2334 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2335 + " out to new task " + target.task); 2336 } 2337 2338 final int targetTaskId = targetTask.taskId; 2339 mWindowManager.setAppTask(target.appToken, targetTaskId); 2340 2341 boolean noOptions = canMoveOptions; 2342 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2343 for (int srcPos = start; srcPos >= i; --srcPos) { 2344 final ActivityRecord p = activities.get(srcPos); 2345 if (p.finishing) { 2346 continue; 2347 } 2348 2349 canMoveOptions = false; 2350 if (noOptions && topOptions == null) { 2351 topOptions = p.takeOptionsLocked(); 2352 if (topOptions != null) { 2353 noOptions = false; 2354 } 2355 } 2356 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2357 "Removing activity " + p + " from task=" + task + " adding to task=" 2358 + targetTask + " Callers=" + Debug.getCallers(4)); 2359 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2360 "Pushing next activity " + p + " out to target's task " + target.task); 2361 p.setTask(targetTask, null); 2362 targetTask.addActivityAtBottom(p); 2363 2364 mWindowManager.setAppTask(p.appToken, targetTaskId); 2365 } 2366 2367 mWindowManager.moveTaskToBottom(targetTaskId); 2368 if (VALIDATE_TOKENS) { 2369 validateAppTokensLocked(); 2370 } 2371 2372 replyChainEnd = -1; 2373 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2374 // If the activity should just be removed -- either 2375 // because it asks for it, or the task should be 2376 // cleared -- then finish it and anything that is 2377 // part of its reply chain. 2378 int end; 2379 if (clearWhenTaskReset) { 2380 // In this case, we want to finish this activity 2381 // and everything above it, so be sneaky and pretend 2382 // like these are all in the reply chain. 2383 end = activities.size() - 1; 2384 } else if (replyChainEnd < 0) { 2385 end = i; 2386 } else { 2387 end = replyChainEnd; 2388 } 2389 boolean noOptions = canMoveOptions; 2390 for (int srcPos = i; srcPos <= end; srcPos++) { 2391 ActivityRecord p = activities.get(srcPos); 2392 if (p.finishing) { 2393 continue; 2394 } 2395 canMoveOptions = false; 2396 if (noOptions && topOptions == null) { 2397 topOptions = p.takeOptionsLocked(); 2398 if (topOptions != null) { 2399 noOptions = false; 2400 } 2401 } 2402 if (DEBUG_TASKS) Slog.w(TAG_TASKS, 2403 "resetTaskIntendedTask: calling finishActivity on " + p); 2404 if (finishActivityLocked( 2405 p, Activity.RESULT_CANCELED, null, "reset-task", false)) { 2406 end--; 2407 srcPos--; 2408 } 2409 } 2410 replyChainEnd = -1; 2411 } else { 2412 // If we were in the middle of a chain, well the 2413 // activity that started it all doesn't want anything 2414 // special, so leave it all as-is. 2415 replyChainEnd = -1; 2416 } 2417 } 2418 2419 return topOptions; 2420 } 2421 2422 /** 2423 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2424 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2425 * @param affinityTask The task we are looking for an affinity to. 2426 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2427 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2428 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2429 */ 2430 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2431 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2432 int replyChainEnd = -1; 2433 final int taskId = task.taskId; 2434 final String taskAffinity = task.affinity; 2435 2436 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2437 final int numActivities = activities.size(); 2438 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2439 2440 // Do not operate on or below the effective root Activity. 2441 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2442 ActivityRecord target = activities.get(i); 2443 if (target.frontOfTask) 2444 break; 2445 2446 final int flags = target.info.flags; 2447 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2448 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2449 2450 if (target.resultTo != null) { 2451 // If this activity is sending a reply to a previous 2452 // activity, we can't do anything with it now until 2453 // we reach the start of the reply chain. 2454 // XXX note that we are assuming the result is always 2455 // to the previous activity, which is almost always 2456 // the case but we really shouldn't count on. 2457 if (replyChainEnd < 0) { 2458 replyChainEnd = i; 2459 } 2460 } else if (topTaskIsHigher 2461 && allowTaskReparenting 2462 && taskAffinity != null 2463 && taskAffinity.equals(target.taskAffinity)) { 2464 // This activity has an affinity for our task. Either remove it if we are 2465 // clearing or move it over to our task. Note that 2466 // we currently punt on the case where we are resetting a 2467 // task that is not at the top but who has activities above 2468 // with an affinity to it... this is really not a normal 2469 // case, and we will need to later pull that task to the front 2470 // and usually at that point we will do the reset and pick 2471 // up those remaining activities. (This only happens if 2472 // someone starts an activity in a new task from an activity 2473 // in a task that is not currently on top.) 2474 if (forceReset || finishOnTaskLaunch) { 2475 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2476 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2477 "Finishing task at index " + start + " to " + i); 2478 for (int srcPos = start; srcPos >= i; --srcPos) { 2479 final ActivityRecord p = activities.get(srcPos); 2480 if (p.finishing) { 2481 continue; 2482 } 2483 finishActivityLocked( 2484 p, Activity.RESULT_CANCELED, null, "move-affinity", false); 2485 } 2486 } else { 2487 if (taskInsertionPoint < 0) { 2488 taskInsertionPoint = task.mActivities.size(); 2489 2490 } 2491 2492 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2493 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2494 "Reparenting from task=" + affinityTask + ":" + start + "-" + i 2495 + " to task=" + task + ":" + taskInsertionPoint); 2496 for (int srcPos = start; srcPos >= i; --srcPos) { 2497 final ActivityRecord p = activities.get(srcPos); 2498 p.setTask(task, null); 2499 task.addActivityAtIndex(taskInsertionPoint, p); 2500 2501 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2502 "Removing and adding activity " + p + " to stack at " + task 2503 + " callers=" + Debug.getCallers(3)); 2504 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p 2505 + " from " + srcPos + " in to resetting task " + task); 2506 mWindowManager.setAppTask(p.appToken, taskId); 2507 } 2508 mWindowManager.moveTaskToTop(taskId); 2509 if (VALIDATE_TOKENS) { 2510 validateAppTokensLocked(); 2511 } 2512 2513 // Now we've moved it in to place... but what if this is 2514 // a singleTop activity and we have put it on top of another 2515 // instance of the same activity? Then we drop the instance 2516 // below so it remains singleTop. 2517 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2518 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2519 int targetNdx = taskActivities.indexOf(target); 2520 if (targetNdx > 0) { 2521 ActivityRecord p = taskActivities.get(targetNdx - 1); 2522 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2523 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2524 false); 2525 } 2526 } 2527 } 2528 } 2529 2530 replyChainEnd = -1; 2531 } 2532 } 2533 return taskInsertionPoint; 2534 } 2535 2536 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2537 ActivityRecord newActivity) { 2538 boolean forceReset = 2539 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2540 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2541 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2542 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2543 forceReset = true; 2544 } 2545 } 2546 2547 final TaskRecord task = taskTop.task; 2548 2549 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2550 * for remaining tasks. Used for later tasks to reparent to task. */ 2551 boolean taskFound = false; 2552 2553 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2554 ActivityOptions topOptions = null; 2555 2556 // Preserve the location for reparenting in the new task. 2557 int reparentInsertionPoint = -1; 2558 2559 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2560 final TaskRecord targetTask = mTaskHistory.get(i); 2561 2562 if (targetTask == task) { 2563 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2564 taskFound = true; 2565 } else { 2566 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2567 taskFound, forceReset, reparentInsertionPoint); 2568 } 2569 } 2570 2571 int taskNdx = mTaskHistory.indexOf(task); 2572 if (taskNdx >= 0) { 2573 do { 2574 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2575 } while (taskTop == null && taskNdx >= 0); 2576 } 2577 2578 if (topOptions != null) { 2579 // If we got some ActivityOptions from an activity on top that 2580 // was removed from the task, propagate them to the new real top. 2581 if (taskTop != null) { 2582 taskTop.updateOptionsLocked(topOptions); 2583 } else { 2584 topOptions.abort(); 2585 } 2586 } 2587 2588 return taskTop; 2589 } 2590 2591 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2592 String resultWho, int requestCode, int resultCode, Intent data) { 2593 2594 if (callingUid > 0) { 2595 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2596 data, r.getUriPermissionsLocked(), r.userId); 2597 } 2598 2599 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2600 + " : who=" + resultWho + " req=" + requestCode 2601 + " res=" + resultCode + " data=" + data); 2602 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2603 try { 2604 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2605 list.add(new ResultInfo(resultWho, requestCode, 2606 resultCode, data)); 2607 r.app.thread.scheduleSendResult(r.appToken, list); 2608 return; 2609 } catch (Exception e) { 2610 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2611 } 2612 } 2613 2614 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2615 } 2616 2617 private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { 2618 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2619 ActivityRecord next = topRunningActivityLocked(null); 2620 final String myReason = reason + " adjustFocus"; 2621 if (next != r) { 2622 final TaskRecord task = r.task; 2623 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2624 // For non-fullscreen stack, we want to move the focus to the next visible 2625 // stack to prevent the home screen from moving to the top and obscuring 2626 // other visible stacks. 2627 if (!mFullscreen 2628 && adjustFocusToNextVisibleStackLocked(null, myReason)) { 2629 return; 2630 } 2631 // Move the home stack to the top if this stack is fullscreen or there is no 2632 // other visible stack. 2633 if (mStackSupervisor.moveHomeStackTaskToTop( 2634 task.getTaskToReturnTo(), myReason)) { 2635 // Activity focus was already adjusted. Nothing else to do... 2636 return; 2637 } 2638 } 2639 } 2640 2641 final ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2642 if (top != null) { 2643 mService.setFocusedActivityLocked(top, myReason); 2644 } 2645 } 2646 } 2647 2648 private boolean adjustFocusToNextVisibleStackLocked(ActivityStack inStack, String reason) { 2649 final ActivityStack stack = (inStack != null) ? inStack : getNextVisibleStackLocked(); 2650 final String myReason = reason + " adjustFocusToNextVisibleStack"; 2651 if (stack == null) { 2652 return false; 2653 } 2654 final ActivityRecord top = stack.topRunningActivityLocked(null); 2655 if (top == null) { 2656 return false; 2657 } 2658 mService.setFocusedActivityLocked(top, myReason); 2659 return true; 2660 } 2661 2662 final void stopActivityLocked(ActivityRecord r) { 2663 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r); 2664 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2665 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2666 if (!r.finishing) { 2667 if (!mService.isSleeping()) { 2668 if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r); 2669 if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2670 "stop-no-history", false)) { 2671 // Activity was finished, no need to continue trying to schedule stop. 2672 adjustFocusedActivityLocked(r, "stopActivityFinished"); 2673 r.resumeKeyDispatchingLocked(); 2674 return; 2675 } 2676 } else { 2677 if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r 2678 + " on stop because we're just sleeping"); 2679 } 2680 } 2681 } 2682 2683 if (r.app != null && r.app.thread != null) { 2684 adjustFocusedActivityLocked(r, "stopActivity"); 2685 r.resumeKeyDispatchingLocked(); 2686 try { 2687 r.stopped = false; 2688 if (DEBUG_STATES) Slog.v(TAG_STATES, 2689 "Moving to STOPPING: " + r + " (stop requested)"); 2690 r.state = ActivityState.STOPPING; 2691 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 2692 "Stopping visible=" + r.visible + " for " + r); 2693 if (!r.visible) { 2694 mWindowManager.setAppVisibility(r.appToken, false); 2695 } 2696 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2697 if (mService.isSleepingOrShuttingDown()) { 2698 r.setSleeping(true); 2699 } 2700 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2701 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2702 } catch (Exception e) { 2703 // Maybe just ignore exceptions here... if the process 2704 // has crashed, our death notification will clean things 2705 // up. 2706 Slog.w(TAG, "Exception thrown during pause", e); 2707 // Just in case, assume it to be stopped. 2708 r.stopped = true; 2709 if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r); 2710 r.state = ActivityState.STOPPED; 2711 if (r.configDestroy) { 2712 destroyActivityLocked(r, true, "stop-except"); 2713 } 2714 } 2715 } 2716 } 2717 2718 /** 2719 * @return Returns true if the activity is being finished, false if for 2720 * some reason it is being left as-is. 2721 */ 2722 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2723 Intent resultData, String reason, boolean oomAdj) { 2724 ActivityRecord r = isInStackLocked(token); 2725 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES, 2726 "Finishing activity token=" + token + " r=" 2727 + ", result=" + resultCode + ", data=" + resultData 2728 + ", reason=" + reason); 2729 if (r == null) { 2730 return false; 2731 } 2732 2733 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2734 return true; 2735 } 2736 2737 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2738 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2739 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2740 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2741 ActivityRecord r = activities.get(activityNdx); 2742 if (r.resultTo == self && r.requestCode == requestCode) { 2743 if ((r.resultWho == null && resultWho == null) || 2744 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2745 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2746 false); 2747 } 2748 } 2749 } 2750 } 2751 mService.updateOomAdjLocked(); 2752 } 2753 2754 final void finishTopRunningActivityLocked(ProcessRecord app, String reason) { 2755 ActivityRecord r = topRunningActivityLocked(null); 2756 if (r != null && r.app == app) { 2757 // If the top running activity is from this crashing 2758 // process, then terminate it to avoid getting in a loop. 2759 Slog.w(TAG, " Force finishing activity " 2760 + r.intent.getComponent().flattenToShortString()); 2761 int taskNdx = mTaskHistory.indexOf(r.task); 2762 int activityNdx = r.task.mActivities.indexOf(r); 2763 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 2764 // Also terminate any activities below it that aren't yet 2765 // stopped, to avoid a situation where one will get 2766 // re-start our crashing activity once it gets resumed again. 2767 --activityNdx; 2768 if (activityNdx < 0) { 2769 do { 2770 --taskNdx; 2771 if (taskNdx < 0) { 2772 break; 2773 } 2774 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2775 } while (activityNdx < 0); 2776 } 2777 if (activityNdx >= 0) { 2778 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2779 if (r.state == ActivityState.RESUMED 2780 || r.state == ActivityState.PAUSING 2781 || r.state == ActivityState.PAUSED) { 2782 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2783 Slog.w(TAG, " Force finishing activity " 2784 + r.intent.getComponent().flattenToShortString()); 2785 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 2786 } 2787 } 2788 } 2789 } 2790 } 2791 2792 final void finishVoiceTask(IVoiceInteractionSession session) { 2793 IBinder sessionBinder = session.asBinder(); 2794 boolean didOne = false; 2795 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2796 TaskRecord tr = mTaskHistory.get(taskNdx); 2797 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2798 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2799 ActivityRecord r = tr.mActivities.get(activityNdx); 2800 if (!r.finishing) { 2801 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2802 false); 2803 didOne = true; 2804 } 2805 } 2806 } 2807 } 2808 if (didOne) { 2809 mService.updateOomAdjLocked(); 2810 } 2811 } 2812 2813 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2814 ArrayList<ActivityRecord> activities = r.task.mActivities; 2815 for (int index = activities.indexOf(r); index >= 0; --index) { 2816 ActivityRecord cur = activities.get(index); 2817 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2818 break; 2819 } 2820 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2821 } 2822 return true; 2823 } 2824 2825 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2826 // send the result 2827 ActivityRecord resultTo = r.resultTo; 2828 if (resultTo != null) { 2829 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo 2830 + " who=" + r.resultWho + " req=" + r.requestCode 2831 + " res=" + resultCode + " data=" + resultData); 2832 if (resultTo.userId != r.userId) { 2833 if (resultData != null) { 2834 resultData.prepareToLeaveUser(r.userId); 2835 } 2836 } 2837 if (r.info.applicationInfo.uid > 0) { 2838 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2839 resultTo.packageName, resultData, 2840 resultTo.getUriPermissionsLocked(), resultTo.userId); 2841 } 2842 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2843 resultData); 2844 r.resultTo = null; 2845 } 2846 else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r); 2847 2848 // Make sure this HistoryRecord is not holding on to other resources, 2849 // because clients have remote IPC references to this object so we 2850 // can't assume that will go away and want to avoid circular IPC refs. 2851 r.results = null; 2852 r.pendingResults = null; 2853 r.newIntents = null; 2854 r.icicle = null; 2855 } 2856 2857 /** 2858 * @return Returns true if this activity has been removed from the history 2859 * list, or false if it is still in the list and will be removed later. 2860 */ 2861 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2862 String reason, boolean oomAdj) { 2863 if (r.finishing) { 2864 Slog.w(TAG, "Duplicate finish request for " + r); 2865 return false; 2866 } 2867 2868 r.makeFinishingLocked(); 2869 final TaskRecord task = r.task; 2870 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2871 r.userId, System.identityHashCode(r), 2872 task.taskId, r.shortComponentName, reason); 2873 final ArrayList<ActivityRecord> activities = task.mActivities; 2874 final int index = activities.indexOf(r); 2875 if (index < (activities.size() - 1)) { 2876 task.setFrontOfTask(); 2877 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2878 // If the caller asked that this activity (and all above it) 2879 // be cleared when the task is reset, don't lose that information, 2880 // but propagate it up to the next activity. 2881 ActivityRecord next = activities.get(index+1); 2882 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2883 } 2884 } 2885 2886 r.pauseKeyDispatchingLocked(); 2887 2888 adjustFocusedActivityLocked(r, "finishActivity"); 2889 2890 finishActivityResultsLocked(r, resultCode, resultData); 2891 2892 if (mResumedActivity == r) { 2893 boolean endTask = index <= 0; 2894 if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2895 "Prepare close transition: finishing " + r); 2896 mWindowManager.prepareAppTransition(endTask 2897 ? AppTransition.TRANSIT_TASK_CLOSE 2898 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2899 2900 // Tell window manager to prepare for this one to be removed. 2901 mWindowManager.setAppVisibility(r.appToken, false); 2902 2903 if (mPausingActivity == null) { 2904 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r); 2905 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 2906 "finish() => pause with userLeaving=false"); 2907 startPausingLocked(false, false, false, false); 2908 } 2909 2910 if (endTask) { 2911 mStackSupervisor.removeLockedTaskLocked(task); 2912 } 2913 } else if (r.state != ActivityState.PAUSING) { 2914 // If the activity is PAUSING, we will complete the finish once 2915 // it is done pausing; else we can just directly finish it here. 2916 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r); 2917 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2918 } else { 2919 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r); 2920 } 2921 2922 return false; 2923 } 2924 2925 static final int FINISH_IMMEDIATELY = 0; 2926 static final int FINISH_AFTER_PAUSE = 1; 2927 static final int FINISH_AFTER_VISIBLE = 2; 2928 2929 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2930 // First things first: if this activity is currently visible, 2931 // and the resumed activity is not yet visible, then hold off on 2932 // finishing until the resumed one becomes visible. 2933 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2934 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2935 mStackSupervisor.mStoppingActivities.add(r); 2936 if (mStackSupervisor.mStoppingActivities.size() > 3 2937 || r.frontOfTask && mTaskHistory.size() <= 1) { 2938 // If we already have a few activities waiting to stop, 2939 // then give up on things going idle and start clearing 2940 // them out. Or if r is the last of activity of the last task the stack 2941 // will be empty and must be cleared immediately. 2942 mStackSupervisor.scheduleIdleLocked(); 2943 } else { 2944 mStackSupervisor.checkReadyForSleepLocked(); 2945 } 2946 } 2947 if (DEBUG_STATES) Slog.v(TAG_STATES, 2948 "Moving to STOPPING: "+ r + " (finish requested)"); 2949 r.state = ActivityState.STOPPING; 2950 if (oomAdj) { 2951 mService.updateOomAdjLocked(); 2952 } 2953 return r; 2954 } 2955 2956 // make sure the record is cleaned out of other places. 2957 mStackSupervisor.mStoppingActivities.remove(r); 2958 mStackSupervisor.mGoingToSleepActivities.remove(r); 2959 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2960 if (mResumedActivity == r) { 2961 mResumedActivity = null; 2962 } 2963 final ActivityState prevState = r.state; 2964 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r); 2965 r.state = ActivityState.FINISHING; 2966 2967 if (mode == FINISH_IMMEDIATELY 2968 || (mode == FINISH_AFTER_PAUSE && prevState == ActivityState.PAUSED) 2969 || prevState == ActivityState.STOPPED 2970 || prevState == ActivityState.INITIALIZING) { 2971 // If this activity is already stopped, we can just finish 2972 // it right now. 2973 r.makeFinishingLocked(); 2974 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2975 if (activityRemoved) { 2976 mStackSupervisor.resumeTopActivitiesLocked(); 2977 } 2978 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, 2979 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2980 " destroy returned removed=" + activityRemoved); 2981 return activityRemoved ? null : r; 2982 } 2983 2984 // Need to go through the full pause cycle to get this 2985 // activity into the stopped state and then finish it. 2986 if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); 2987 mStackSupervisor.mFinishingActivities.add(r); 2988 r.resumeKeyDispatchingLocked(); 2989 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2990 return r; 2991 } 2992 2993 void finishAllActivitiesLocked(boolean immediately) { 2994 boolean noActivitiesInStack = true; 2995 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2996 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2997 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2998 final ActivityRecord r = activities.get(activityNdx); 2999 noActivitiesInStack = false; 3000 if (r.finishing && !immediately) { 3001 continue; 3002 } 3003 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 3004 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3005 } 3006 } 3007 if (noActivitiesInStack) { 3008 mActivityContainer.onTaskListEmptyLocked(); 3009 } 3010 } 3011 3012 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 3013 // Basic case: for simple app-centric recents, we need to recreate 3014 // the task if the affinity has changed. 3015 if (srec == null || srec.task.affinity == null || 3016 !srec.task.affinity.equals(destAffinity)) { 3017 return true; 3018 } 3019 // Document-centric case: an app may be split in to multiple documents; 3020 // they need to re-create their task if this current activity is the root 3021 // of a document, unless simply finishing it will return them to the the 3022 // correct app behind. 3023 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 3024 && srec.task.getBaseIntent().isDocument()) { 3025 // Okay, this activity is at the root of its task. What to do, what to do... 3026 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 3027 // Finishing won't return to an application, so we need to recreate. 3028 return true; 3029 } 3030 // We now need to get the task below it to determine what to do. 3031 int taskIdx = mTaskHistory.indexOf(srec.task); 3032 if (taskIdx <= 0) { 3033 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 3034 return false; 3035 } 3036 if (taskIdx == 0) { 3037 // At the bottom of the stack, nothing to go back to. 3038 return true; 3039 } 3040 TaskRecord prevTask = mTaskHistory.get(taskIdx); 3041 if (!srec.task.affinity.equals(prevTask.affinity)) { 3042 // These are different apps, so need to recreate. 3043 return true; 3044 } 3045 } 3046 return false; 3047 } 3048 3049 final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, 3050 Intent resultData) { 3051 final TaskRecord task = srec.task; 3052 final ArrayList<ActivityRecord> activities = task.mActivities; 3053 final int start = activities.indexOf(srec); 3054 if (!mTaskHistory.contains(task) || (start < 0)) { 3055 return false; 3056 } 3057 int finishTo = start - 1; 3058 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 3059 boolean foundParentInTask = false; 3060 final ComponentName dest = destIntent.getComponent(); 3061 if (start > 0 && dest != null) { 3062 for (int i = finishTo; i >= 0; i--) { 3063 ActivityRecord r = activities.get(i); 3064 if (r.info.packageName.equals(dest.getPackageName()) && 3065 r.info.name.equals(dest.getClassName())) { 3066 finishTo = i; 3067 parent = r; 3068 foundParentInTask = true; 3069 break; 3070 } 3071 } 3072 } 3073 3074 IActivityController controller = mService.mController; 3075 if (controller != null) { 3076 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 3077 if (next != null) { 3078 // ask watcher if this is allowed 3079 boolean resumeOK = true; 3080 try { 3081 resumeOK = controller.activityResuming(next.packageName); 3082 } catch (RemoteException e) { 3083 mService.mController = null; 3084 Watchdog.getInstance().setActivityController(null); 3085 } 3086 3087 if (!resumeOK) { 3088 return false; 3089 } 3090 } 3091 } 3092 final long origId = Binder.clearCallingIdentity(); 3093 for (int i = start; i > finishTo; i--) { 3094 ActivityRecord r = activities.get(i); 3095 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 3096 // Only return the supplied result for the first activity finished 3097 resultCode = Activity.RESULT_CANCELED; 3098 resultData = null; 3099 } 3100 3101 if (parent != null && foundParentInTask) { 3102 final int parentLaunchMode = parent.info.launchMode; 3103 final int destIntentFlags = destIntent.getFlags(); 3104 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 3105 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 3106 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 3107 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 3108 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 3109 srec.packageName); 3110 } else { 3111 try { 3112 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 3113 destIntent.getComponent(), 0, srec.userId); 3114 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 3115 null, aInfo, null, null, parent.appToken, null, 3116 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 3117 -1, parent.launchedFromUid, 0, null, false, true, null, null, null); 3118 foundParentInTask = res == ActivityManager.START_SUCCESS; 3119 } catch (RemoteException e) { 3120 foundParentInTask = false; 3121 } 3122 requestFinishActivityLocked(parent.appToken, resultCode, 3123 resultData, "navigate-top", true); 3124 } 3125 } 3126 Binder.restoreCallingIdentity(origId); 3127 return foundParentInTask; 3128 } 3129 /** 3130 * Perform the common clean-up of an activity record. This is called both 3131 * as part of destroyActivityLocked() (when destroying the client-side 3132 * representation) and cleaning things up as a result of its hosting 3133 * processing going away, in which case there is no remaining client-side 3134 * state to destroy so only the cleanup here is needed. 3135 * 3136 * Note: Call before #removeActivityFromHistoryLocked. 3137 */ 3138 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 3139 boolean setState) { 3140 if (mResumedActivity == r) { 3141 mResumedActivity = null; 3142 } 3143 if (mPausingActivity == r) { 3144 mPausingActivity = null; 3145 } 3146 mService.clearFocusedActivity(r); 3147 3148 r.configDestroy = false; 3149 r.frozenBeforeDestroy = false; 3150 3151 if (setState) { 3152 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)"); 3153 r.state = ActivityState.DESTROYED; 3154 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r); 3155 r.app = null; 3156 } 3157 3158 // Make sure this record is no longer in the pending finishes list. 3159 // This could happen, for example, if we are trimming activities 3160 // down to the max limit while they are still waiting to finish. 3161 mStackSupervisor.mFinishingActivities.remove(r); 3162 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3163 3164 // Remove any pending results. 3165 if (r.finishing && r.pendingResults != null) { 3166 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3167 PendingIntentRecord rec = apr.get(); 3168 if (rec != null) { 3169 mService.cancelIntentSenderLocked(rec, false); 3170 } 3171 } 3172 r.pendingResults = null; 3173 } 3174 3175 if (cleanServices) { 3176 cleanUpActivityServicesLocked(r); 3177 } 3178 3179 // Get rid of any pending idle timeouts. 3180 removeTimeoutsForActivityLocked(r); 3181 if (getVisibleBehindActivity() == r) { 3182 mStackSupervisor.requestVisibleBehindLocked(r, false); 3183 } 3184 } 3185 3186 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3187 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3188 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3189 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3190 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3191 r.finishLaunchTickingLocked(); 3192 } 3193 3194 private void removeActivityFromHistoryLocked(ActivityRecord r, String reason) { 3195 mStackSupervisor.removeChildActivityContainers(r); 3196 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3197 r.makeFinishingLocked(); 3198 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3199 "Removing activity " + r + " from stack callers=" + Debug.getCallers(5)); 3200 3201 r.takeFromHistory(); 3202 removeTimeoutsForActivityLocked(r); 3203 if (DEBUG_STATES) Slog.v(TAG_STATES, 3204 "Moving to DESTROYED: " + r + " (removed from history)"); 3205 r.state = ActivityState.DESTROYED; 3206 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r); 3207 r.app = null; 3208 mWindowManager.removeAppToken(r.appToken); 3209 if (VALIDATE_TOKENS) { 3210 validateAppTokensLocked(); 3211 } 3212 final TaskRecord task = r.task; 3213 if (task != null && task.removeActivity(r)) { 3214 if (DEBUG_STACK) Slog.i(TAG_STACK, 3215 "removeActivityFromHistoryLocked: last activity removed from " + this); 3216 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3217 task.isOverHomeStack()) { 3218 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); 3219 } 3220 removeTask(task, reason); 3221 } 3222 cleanUpActivityServicesLocked(r); 3223 r.removeUriPermissionsLocked(); 3224 } 3225 3226 /** 3227 * Perform clean-up of service connections in an activity record. 3228 */ 3229 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3230 // Throw away any services that have been bound by this activity. 3231 if (r.connections != null) { 3232 Iterator<ConnectionRecord> it = r.connections.iterator(); 3233 while (it.hasNext()) { 3234 ConnectionRecord c = it.next(); 3235 mService.mServices.removeConnectionLocked(c, null, r); 3236 } 3237 r.connections = null; 3238 } 3239 } 3240 3241 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3242 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3243 msg.obj = new ScheduleDestroyArgs(owner, reason); 3244 mHandler.sendMessage(msg); 3245 } 3246 3247 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3248 boolean lastIsOpaque = false; 3249 boolean activityRemoved = false; 3250 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3251 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3252 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3253 final ActivityRecord r = activities.get(activityNdx); 3254 if (r.finishing) { 3255 continue; 3256 } 3257 if (r.fullscreen) { 3258 lastIsOpaque = true; 3259 } 3260 if (owner != null && r.app != owner) { 3261 continue; 3262 } 3263 if (!lastIsOpaque) { 3264 continue; 3265 } 3266 if (r.isDestroyable()) { 3267 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state 3268 + " resumed=" + mResumedActivity 3269 + " pausing=" + mPausingActivity + " for reason " + reason); 3270 if (destroyActivityLocked(r, true, reason)) { 3271 activityRemoved = true; 3272 } 3273 } 3274 } 3275 } 3276 if (activityRemoved) { 3277 mStackSupervisor.resumeTopActivitiesLocked(); 3278 } 3279 } 3280 3281 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3282 if (r.isDestroyable()) { 3283 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 3284 "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity 3285 + " pausing=" + mPausingActivity + " for reason " + reason); 3286 return destroyActivityLocked(r, true, reason); 3287 } 3288 return false; 3289 } 3290 3291 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3292 String reason) { 3293 // Iterate over tasks starting at the back (oldest) first. 3294 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app); 3295 int maxTasks = tasks.size() / 4; 3296 if (maxTasks < 1) { 3297 maxTasks = 1; 3298 } 3299 int numReleased = 0; 3300 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3301 final TaskRecord task = mTaskHistory.get(taskNdx); 3302 if (!tasks.contains(task)) { 3303 continue; 3304 } 3305 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task); 3306 int curNum = 0; 3307 final ArrayList<ActivityRecord> activities = task.mActivities; 3308 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3309 final ActivityRecord activity = activities.get(actNdx); 3310 if (activity.app == app && activity.isDestroyable()) { 3311 if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity 3312 + " in state " + activity.state + " resumed=" + mResumedActivity 3313 + " pausing=" + mPausingActivity + " for reason " + reason); 3314 destroyActivityLocked(activity, true, reason); 3315 if (activities.get(actNdx) != activity) { 3316 // Was removed from list, back up so we don't miss the next one. 3317 actNdx--; 3318 } 3319 curNum++; 3320 } 3321 } 3322 if (curNum > 0) { 3323 numReleased += curNum; 3324 maxTasks--; 3325 if (mTaskHistory.get(taskNdx) != task) { 3326 // The entire task got removed, back up so we don't miss the next one. 3327 taskNdx--; 3328 } 3329 } 3330 } 3331 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, 3332 "Done releasing: did " + numReleased + " activities"); 3333 return numReleased; 3334 } 3335 3336 /** 3337 * Destroy the current CLIENT SIDE instance of an activity. This may be 3338 * called both when actually finishing an activity, or when performing 3339 * a configuration switch where we destroy the current client-side object 3340 * but then create a new client-side object for this same HistoryRecord. 3341 */ 3342 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3343 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH, 3344 "Removing activity from " + reason + ": token=" + r 3345 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3346 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3347 r.userId, System.identityHashCode(r), 3348 r.task.taskId, r.shortComponentName, reason); 3349 3350 boolean removedFromHistory = false; 3351 3352 cleanUpActivityLocked(r, false, false); 3353 3354 final boolean hadApp = r.app != null; 3355 3356 if (hadApp) { 3357 if (removeFromApp) { 3358 r.app.activities.remove(r); 3359 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3360 mService.mHeavyWeightProcess = null; 3361 mService.mHandler.sendEmptyMessage( 3362 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3363 } 3364 if (r.app.activities.isEmpty()) { 3365 // Update any services we are bound to that might care about whether 3366 // their client may have activities. 3367 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3368 // No longer have activities, so update LRU list and oom adj. 3369 mService.updateLruProcessLocked(r.app, false, null); 3370 mService.updateOomAdjLocked(); 3371 } 3372 } 3373 3374 boolean skipDestroy = false; 3375 3376 try { 3377 if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r); 3378 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3379 r.configChangeFlags); 3380 } catch (Exception e) { 3381 // We can just ignore exceptions here... if the process 3382 // has crashed, our death notification will clean things 3383 // up. 3384 //Slog.w(TAG, "Exception thrown during finish", e); 3385 if (r.finishing) { 3386 removeActivityFromHistoryLocked(r, reason + " exceptionInScheduleDestroy"); 3387 removedFromHistory = true; 3388 skipDestroy = true; 3389 } 3390 } 3391 3392 r.nowVisible = false; 3393 3394 // If the activity is finishing, we need to wait on removing it 3395 // from the list to give it a chance to do its cleanup. During 3396 // that time it may make calls back with its token so we need to 3397 // be able to find it on the list and so we don't want to remove 3398 // it from the list yet. Otherwise, we can just immediately put 3399 // it in the destroyed state since we are not removing it from the 3400 // list. 3401 if (r.finishing && !skipDestroy) { 3402 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r 3403 + " (destroy requested)"); 3404 r.state = ActivityState.DESTROYING; 3405 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3406 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3407 } else { 3408 if (DEBUG_STATES) Slog.v(TAG_STATES, 3409 "Moving to DESTROYED: " + r + " (destroy skipped)"); 3410 r.state = ActivityState.DESTROYED; 3411 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 3412 r.app = null; 3413 } 3414 } else { 3415 // remove this record from the history. 3416 if (r.finishing) { 3417 removeActivityFromHistoryLocked(r, reason + " hadNoApp"); 3418 removedFromHistory = true; 3419 } else { 3420 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)"); 3421 r.state = ActivityState.DESTROYED; 3422 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 3423 r.app = null; 3424 } 3425 } 3426 3427 r.configChangeFlags = 0; 3428 3429 if (!mLRUActivities.remove(r) && hadApp) { 3430 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3431 } 3432 3433 return removedFromHistory; 3434 } 3435 3436 final void activityDestroyedLocked(IBinder token, String reason) { 3437 final long origId = Binder.clearCallingIdentity(); 3438 try { 3439 ActivityRecord r = ActivityRecord.forTokenLocked(token); 3440 if (r != null) { 3441 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3442 } 3443 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r); 3444 3445 if (isInStackLocked(r) != null) { 3446 if (r.state == ActivityState.DESTROYING) { 3447 cleanUpActivityLocked(r, true, false); 3448 removeActivityFromHistoryLocked(r, reason); 3449 } 3450 } 3451 mStackSupervisor.resumeTopActivitiesLocked(); 3452 } finally { 3453 Binder.restoreCallingIdentity(origId); 3454 } 3455 } 3456 3457 void releaseBackgroundResources(ActivityRecord r) { 3458 if (hasVisibleBehindActivity() && 3459 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3460 if (r == topRunningActivityLocked(null)) { 3461 // Don't release the top activity if it has requested to run behind the next 3462 // activity. 3463 return; 3464 } 3465 if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" + 3466 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3467 " thread=" + r.app.thread); 3468 if (r != null && r.app != null && r.app.thread != null) { 3469 try { 3470 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3471 } catch (RemoteException e) { 3472 } 3473 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3474 } else { 3475 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3476 backgroundResourcesReleased(); 3477 } 3478 } 3479 } 3480 3481 final void backgroundResourcesReleased() { 3482 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3483 final ActivityRecord r = getVisibleBehindActivity(); 3484 if (r != null) { 3485 mStackSupervisor.mStoppingActivities.add(r); 3486 setVisibleBehindActivity(null); 3487 mStackSupervisor.scheduleIdleTimeoutLocked(null); 3488 } 3489 mStackSupervisor.resumeTopActivitiesLocked(); 3490 } 3491 3492 boolean hasVisibleBehindActivity() { 3493 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3494 } 3495 3496 void setVisibleBehindActivity(ActivityRecord r) { 3497 if (isAttached()) { 3498 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3499 } 3500 } 3501 3502 ActivityRecord getVisibleBehindActivity() { 3503 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3504 } 3505 3506 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3507 ProcessRecord app, String listName) { 3508 int i = list.size(); 3509 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3510 "Removing app " + app + " from list " + listName + " with " + i + " entries"); 3511 while (i > 0) { 3512 i--; 3513 ActivityRecord r = list.get(i); 3514 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); 3515 if (r.app == app) { 3516 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); 3517 list.remove(i); 3518 removeTimeoutsForActivityLocked(r); 3519 } 3520 } 3521 } 3522 3523 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3524 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3525 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3526 "mStoppingActivities"); 3527 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3528 "mGoingToSleepActivities"); 3529 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3530 "mWaitingVisibleActivities"); 3531 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3532 "mFinishingActivities"); 3533 3534 boolean hasVisibleActivities = false; 3535 3536 // Clean out the history list. 3537 int i = numActivities(); 3538 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3539 "Removing app " + app + " from history with " + i + " entries"); 3540 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3541 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3542 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3543 final ActivityRecord r = activities.get(activityNdx); 3544 --i; 3545 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3546 "Record #" + i + " " + r + ": app=" + r.app); 3547 if (r.app == app) { 3548 if (r.visible) { 3549 hasVisibleActivities = true; 3550 } 3551 final boolean remove; 3552 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3553 // Don't currently have state for the activity, or 3554 // it is finishing -- always remove it. 3555 remove = true; 3556 } else if (r.launchCount > 2 && 3557 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3558 // We have launched this activity too many times since it was 3559 // able to run, so give up and remove it. 3560 remove = true; 3561 } else { 3562 // The process may be gone, but the activity lives on! 3563 remove = false; 3564 } 3565 if (remove) { 3566 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE, 3567 "Removing activity " + r + " from stack at " + i 3568 + ": haveState=" + r.haveState 3569 + " stateNotNeeded=" + r.stateNotNeeded 3570 + " finishing=" + r.finishing 3571 + " state=" + r.state + " callers=" + Debug.getCallers(5)); 3572 if (!r.finishing) { 3573 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3574 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3575 r.userId, System.identityHashCode(r), 3576 r.task.taskId, r.shortComponentName, 3577 "proc died without state saved"); 3578 if (r.state == ActivityState.RESUMED) { 3579 mService.updateUsageStats(r, false); 3580 } 3581 } 3582 } else { 3583 // We have the current state for this activity, so 3584 // it can be restarted later when needed. 3585 if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null"); 3586 if (DEBUG_APP) Slog.v(TAG_APP, 3587 "Clearing app during removeHistory for activity " + r); 3588 r.app = null; 3589 r.nowVisible = false; 3590 if (!r.haveState) { 3591 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 3592 "App died, clearing saved state of " + r); 3593 r.icicle = null; 3594 } 3595 } 3596 cleanUpActivityLocked(r, true, true); 3597 if (remove) { 3598 removeActivityFromHistoryLocked(r, "appDied"); 3599 } 3600 } 3601 } 3602 } 3603 3604 return hasVisibleActivities; 3605 } 3606 3607 final void updateTransitLocked(int transit, Bundle options) { 3608 if (options != null) { 3609 ActivityRecord r = topRunningActivityLocked(null); 3610 if (r != null && r.state != ActivityState.RESUMED) { 3611 r.updateOptionsLocked(options); 3612 } else { 3613 ActivityOptions.abort(options); 3614 } 3615 } 3616 mWindowManager.prepareAppTransition(transit, false); 3617 } 3618 3619 void updateTaskMovement(TaskRecord task, boolean toFront) { 3620 if (task.isPersistable) { 3621 task.mLastTimeMoved = System.currentTimeMillis(); 3622 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3623 // recently will be most negative, tasks sent to the bottom before that will be less 3624 // negative. Similarly for recent tasks moved to the top which will be most positive. 3625 if (!toFront) { 3626 task.mLastTimeMoved *= -1; 3627 } 3628 } 3629 } 3630 3631 void moveHomeStackTaskToTop(int homeStackTaskType) { 3632 final int top = mTaskHistory.size() - 1; 3633 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3634 final TaskRecord task = mTaskHistory.get(taskNdx); 3635 if (task.taskType == homeStackTaskType) { 3636 if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK, 3637 "moveHomeStackTaskToTop: moving " + task); 3638 mTaskHistory.remove(taskNdx); 3639 mTaskHistory.add(top, task); 3640 updateTaskMovement(task, true); 3641 return; 3642 } 3643 } 3644 } 3645 3646 final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, Bundle options, 3647 AppTimeTracker timeTracker, String reason) { 3648 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr); 3649 3650 final int numTasks = mTaskHistory.size(); 3651 final int index = mTaskHistory.indexOf(tr); 3652 if (numTasks == 0 || index < 0) { 3653 // nothing to do! 3654 if (noAnimation) { 3655 ActivityOptions.abort(options); 3656 } else { 3657 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3658 } 3659 return; 3660 } 3661 3662 if (timeTracker != null) { 3663 // The caller wants a time tracker associated with this task. 3664 for (int i = tr.mActivities.size() - 1; i >= 0; i--) { 3665 tr.mActivities.get(i).appTimeTracker = timeTracker; 3666 } 3667 } 3668 3669 // Shift all activities with this task up to the top 3670 // of the stack, keeping them in the same internal order. 3671 insertTaskAtTop(tr, null); 3672 3673 // Set focus to the top running activity of this stack. 3674 ActivityRecord r = topRunningActivityLocked(null); 3675 mService.setFocusedActivityLocked(r, reason); 3676 3677 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr); 3678 if (noAnimation) { 3679 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3680 if (r != null) { 3681 mNoAnimActivities.add(r); 3682 } 3683 ActivityOptions.abort(options); 3684 } else { 3685 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3686 } 3687 3688 mStackSupervisor.resumeTopActivitiesLocked(); 3689 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3690 3691 if (VALIDATE_TOKENS) { 3692 validateAppTokensLocked(); 3693 } 3694 } 3695 3696 /** 3697 * Worker method for rearranging history stack. Implements the function of moving all 3698 * activities for a specific task (gathering them if disjoint) into a single group at the 3699 * bottom of the stack. 3700 * 3701 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3702 * to premeptively cancel the move. 3703 * 3704 * @param taskId The taskId to collect and move to the bottom. 3705 * @return Returns true if the move completed, false if not. 3706 */ 3707 final boolean moveTaskToBackLocked(int taskId) { 3708 final TaskRecord tr = taskForIdLocked(taskId); 3709 if (tr == null) { 3710 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3711 return false; 3712 } 3713 3714 Slog.i(TAG, "moveTaskToBack: " + tr); 3715 mStackSupervisor.removeLockedTaskLocked(tr); 3716 3717 // If we have a watcher, preflight the move before committing to it. First check 3718 // for *other* available tasks, but if none are available, then try again allowing the 3719 // current task to be selected. 3720 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3721 ActivityRecord next = topRunningActivityLocked(null, taskId); 3722 if (next == null) { 3723 next = topRunningActivityLocked(null, 0); 3724 } 3725 if (next != null) { 3726 // ask watcher if this is allowed 3727 boolean moveOK = true; 3728 try { 3729 moveOK = mService.mController.activityResuming(next.packageName); 3730 } catch (RemoteException e) { 3731 mService.mController = null; 3732 Watchdog.getInstance().setActivityController(null); 3733 } 3734 if (!moveOK) { 3735 return false; 3736 } 3737 } 3738 } 3739 3740 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId); 3741 3742 boolean prevIsHome = false; 3743 3744 // If true, we should resume the home activity next if the task we are moving to the 3745 // back is over the home stack. We force to false if the task we are moving to back 3746 // is the home task and we don't want it resumed after moving to the back. 3747 final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack(); 3748 if (canGoHome) { 3749 final TaskRecord nextTask = getNextTask(tr); 3750 if (nextTask != null) { 3751 nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); 3752 } else { 3753 prevIsHome = true; 3754 } 3755 } 3756 mTaskHistory.remove(tr); 3757 mTaskHistory.add(0, tr); 3758 updateTaskMovement(tr, false); 3759 3760 // There is an assumption that moving a task to the back moves it behind the home activity. 3761 // We make sure here that some activity in the stack will launch home. 3762 int numTasks = mTaskHistory.size(); 3763 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3764 final TaskRecord task = mTaskHistory.get(taskNdx); 3765 if (task.isOverHomeStack()) { 3766 break; 3767 } 3768 if (taskNdx == 1) { 3769 // Set the last task before tr to go to home. 3770 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3771 } 3772 } 3773 3774 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3775 mWindowManager.moveTaskToBottom(taskId); 3776 3777 if (VALIDATE_TOKENS) { 3778 validateAppTokensLocked(); 3779 } 3780 3781 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3782 if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) { 3783 if (!mService.mBooting && !mService.mBooted) { 3784 // Not ready yet! 3785 return false; 3786 } 3787 final int taskToReturnTo = tr.getTaskToReturnTo(); 3788 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3789 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); 3790 } 3791 3792 mStackSupervisor.resumeTopActivitiesLocked(); 3793 return true; 3794 } 3795 3796 static final void logStartActivity(int tag, ActivityRecord r, 3797 TaskRecord task) { 3798 final Uri data = r.intent.getData(); 3799 final String strData = data != null ? data.toSafeString() : null; 3800 3801 EventLog.writeEvent(tag, 3802 r.userId, System.identityHashCode(r), task.taskId, 3803 r.shortComponentName, r.intent.getAction(), 3804 r.intent.getType(), strData, r.intent.getFlags()); 3805 } 3806 3807 /** 3808 * Make sure the given activity matches the current configuration. Returns 3809 * false if the activity had to be destroyed. Returns true if the 3810 * configuration is the same, or the activity will remain running as-is 3811 * for whatever reason. Ensures the HistoryRecord is updated with the 3812 * correct configuration and all other bookkeeping is handled. 3813 */ 3814 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3815 int globalChanges) { 3816 if (mConfigWillChange) { 3817 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3818 "Skipping config check (will change): " + r); 3819 return true; 3820 } 3821 3822 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3823 "Ensuring correct configuration: " + r); 3824 3825 // Make sure the current stack override configuration is supported by the top task 3826 // before continuing. 3827 final TaskRecord topTask = topTask(); 3828 if (topTask != null && ((topTask.mResizeable && mForcedFullscreen) 3829 || (!topTask.mResizeable && !mFullscreen))) { 3830 final boolean prevFullscreen = mFullscreen; 3831 final Configuration newOverrideConfig = 3832 mWindowManager.forceStackToFullscreen(mStackId, !topTask.mResizeable); 3833 updateOverrideConfiguration(newOverrideConfig); 3834 mForcedFullscreen = !prevFullscreen && mFullscreen; 3835 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3836 "Updated stack config to support task=" + topTask 3837 + " resizeable=" + topTask.mResizeable 3838 + " mForcedFullscreen=" + mForcedFullscreen 3839 + " prevFullscreen=" + prevFullscreen 3840 + " mFullscreen=" + mFullscreen); 3841 } 3842 3843 // Short circuit: if the two configurations are the exact same 3844 // object (the common case), then there is nothing to do. 3845 Configuration newConfig = mService.mConfiguration; 3846 if (r.configuration == newConfig 3847 && r.stackConfigOverride == mOverrideConfig 3848 && !r.forceNewConfig) { 3849 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3850 "Configuration unchanged in " + r); 3851 return true; 3852 } 3853 3854 // We don't worry about activities that are finishing. 3855 if (r.finishing) { 3856 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3857 "Configuration doesn't matter in finishing " + r); 3858 r.stopFreezingScreenLocked(false); 3859 return true; 3860 } 3861 3862 // Okay we now are going to make this activity have the new config. 3863 // But then we need to figure out how it needs to deal with that. 3864 final Configuration oldConfig = r.configuration; 3865 final Configuration oldStackOverride = r.stackConfigOverride; 3866 r.configuration = newConfig; 3867 r.stackConfigOverride = mOverrideConfig; 3868 3869 // Determine what has changed. May be nothing, if this is a config 3870 // that has come back from the app after going idle. In that case 3871 // we just want to leave the official config object now in the 3872 // activity and do nothing else. 3873 int stackChanges = oldStackOverride.diff(mOverrideConfig); 3874 if (stackChanges == 0) { 3875 // {@link Configuration#diff} doesn't catch changes from unset values. 3876 // Check for changes we care about. 3877 if (oldStackOverride.orientation != mOverrideConfig.orientation) { 3878 stackChanges |= ActivityInfo.CONFIG_ORIENTATION; 3879 } 3880 if (oldStackOverride.screenHeightDp != mOverrideConfig.screenHeightDp 3881 || oldStackOverride.screenWidthDp != mOverrideConfig.screenWidthDp) { 3882 stackChanges |= ActivityInfo.CONFIG_SCREEN_SIZE; 3883 } 3884 if (oldStackOverride.smallestScreenWidthDp != mOverrideConfig.smallestScreenWidthDp) { 3885 stackChanges |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; 3886 } 3887 } 3888 final int changes = oldConfig.diff(newConfig) | stackChanges; 3889 if (changes == 0 && !r.forceNewConfig) { 3890 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3891 "Configuration no differences in " + r); 3892 return true; 3893 } 3894 3895 // If the activity isn't currently running, just leave the new 3896 // configuration and it will pick that up next time it starts. 3897 if (r.app == null || r.app.thread == null) { 3898 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3899 "Configuration doesn't matter not running " + r); 3900 r.stopFreezingScreenLocked(false); 3901 r.forceNewConfig = false; 3902 return true; 3903 } 3904 3905 // Figure out how to handle the changes between the configurations. 3906 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3907 "Checking to restart " + r.info.name + ": changed=0x" 3908 + Integer.toHexString(changes) + ", handles=0x" 3909 + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig); 3910 3911 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3912 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3913 r.configChangeFlags |= changes; 3914 r.startFreezingScreenLocked(r.app, globalChanges); 3915 r.forceNewConfig = false; 3916 if (r.app == null || r.app.thread == null) { 3917 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3918 "Config is destroying non-running " + r); 3919 destroyActivityLocked(r, true, "config"); 3920 } else if (r.state == ActivityState.PAUSING) { 3921 // A little annoying: we are waiting for this activity to 3922 // finish pausing. Let's not do anything now, but just 3923 // flag that it needs to be restarted when done pausing. 3924 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3925 "Config is skipping already pausing " + r); 3926 r.configDestroy = true; 3927 return true; 3928 } else if (r.state == ActivityState.RESUMED) { 3929 // Try to optimize this case: the configuration is changing 3930 // and we need to restart the top, resumed activity. 3931 // Instead of doing the normal handshaking, just say 3932 // "restart!". 3933 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3934 "Config is relaunching resumed " + r); 3935 relaunchActivityLocked(r, r.configChangeFlags, true); 3936 r.configChangeFlags = 0; 3937 } else { 3938 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3939 "Config is relaunching non-resumed " + r); 3940 relaunchActivityLocked(r, r.configChangeFlags, false); 3941 r.configChangeFlags = 0; 3942 } 3943 3944 // All done... tell the caller we weren't able to keep this 3945 // activity around. 3946 return false; 3947 } 3948 3949 // Default case: the activity can handle this new configuration, so hand it over. 3950 // NOTE: We only forward the stack override configuration as the system level configuration 3951 // changes is always sent to all processes when they happen so it can just use whatever 3952 // system level configuration it last got. 3953 if (r.app != null && r.app.thread != null) { 3954 try { 3955 if (DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Sending new config to " + r); 3956 r.app.thread.scheduleActivityConfigurationChanged( 3957 r.appToken, new Configuration(mOverrideConfig)); 3958 } catch (RemoteException e) { 3959 // If process died, whatever. 3960 } 3961 } 3962 r.stopFreezingScreenLocked(false); 3963 3964 return true; 3965 } 3966 3967 private boolean relaunchActivityLocked(ActivityRecord r, int changes, boolean andResume) { 3968 List<ResultInfo> results = null; 3969 List<ReferrerIntent> newIntents = null; 3970 if (andResume) { 3971 results = r.results; 3972 newIntents = r.newIntents; 3973 } 3974 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 3975 "Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents 3976 + " andResume=" + andResume); 3977 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3978 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3979 r.task.taskId, r.shortComponentName); 3980 3981 r.startFreezingScreenLocked(r.app, 0); 3982 3983 mStackSupervisor.removeChildActivityContainers(r); 3984 3985 try { 3986 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, 3987 "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r); 3988 r.forceNewConfig = false; 3989 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, 3990 !andResume, new Configuration(mService.mConfiguration), 3991 new Configuration(mOverrideConfig)); 3992 // Note: don't need to call pauseIfSleepingLocked() here, because 3993 // the caller will only pass in 'andResume' if this activity is 3994 // currently resumed, which implies we aren't sleeping. 3995 } catch (RemoteException e) { 3996 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e); 3997 } 3998 3999 if (andResume) { 4000 r.results = null; 4001 r.newIntents = null; 4002 r.state = ActivityState.RESUMED; 4003 } else { 4004 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 4005 r.state = ActivityState.PAUSED; 4006 } 4007 4008 return true; 4009 } 4010 4011 boolean willActivityBeVisibleLocked(IBinder token) { 4012 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4013 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4014 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4015 final ActivityRecord r = activities.get(activityNdx); 4016 if (r.appToken == token) { 4017 return true; 4018 } 4019 if (r.fullscreen && !r.finishing) { 4020 return false; 4021 } 4022 } 4023 } 4024 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 4025 if (r == null) { 4026 return false; 4027 } 4028 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 4029 + " would have returned true for r=" + r); 4030 return !r.finishing; 4031 } 4032 4033 void closeSystemDialogsLocked() { 4034 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4035 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4036 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4037 final ActivityRecord r = activities.get(activityNdx); 4038 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 4039 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 4040 } 4041 } 4042 } 4043 } 4044 4045 boolean finishDisabledPackageActivitiesLocked(String packageName, Set<String> filterByClasses, 4046 boolean doit, boolean evenPersistent, int userId) { 4047 boolean didSomething = false; 4048 TaskRecord lastTask = null; 4049 ComponentName homeActivity = null; 4050 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4051 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4052 int numActivities = activities.size(); 4053 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 4054 ActivityRecord r = activities.get(activityNdx); 4055 final boolean sameComponent = 4056 (r.packageName.equals(packageName) && (filterByClasses == null 4057 || filterByClasses.contains(r.realActivity.getClassName()))) 4058 || (packageName == null && r.userId == userId); 4059 if ((userId == UserHandle.USER_ALL || r.userId == userId) 4060 && (sameComponent || r.task == lastTask) 4061 && (r.app == null || evenPersistent || !r.app.persistent)) { 4062 if (!doit) { 4063 if (r.finishing) { 4064 // If this activity is just finishing, then it is not 4065 // interesting as far as something to stop. 4066 continue; 4067 } 4068 return true; 4069 } 4070 if (r.isHomeActivity()) { 4071 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 4072 Slog.i(TAG, "Skip force-stop again " + r); 4073 continue; 4074 } else { 4075 homeActivity = r.realActivity; 4076 } 4077 } 4078 didSomething = true; 4079 Slog.i(TAG, " Force finishing activity " + r); 4080 if (sameComponent) { 4081 if (r.app != null) { 4082 r.app.removed = true; 4083 } 4084 r.app = null; 4085 } 4086 lastTask = r.task; 4087 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 4088 true)) { 4089 // r has been deleted from mActivities, accommodate. 4090 --numActivities; 4091 --activityNdx; 4092 } 4093 } 4094 } 4095 } 4096 return didSomething; 4097 } 4098 4099 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 4100 boolean focusedStack = mStackSupervisor.getFocusedStack() == this; 4101 boolean topTask = true; 4102 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4103 final TaskRecord task = mTaskHistory.get(taskNdx); 4104 if (task.getTopActivity() == null) { 4105 continue; 4106 } 4107 ActivityRecord r = null; 4108 ActivityRecord top = null; 4109 ActivityRecord tmp; 4110 int numActivities = 0; 4111 int numRunning = 0; 4112 final ArrayList<ActivityRecord> activities = task.mActivities; 4113 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 4114 continue; 4115 } 4116 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4117 tmp = activities.get(activityNdx); 4118 if (tmp.finishing) { 4119 continue; 4120 } 4121 r = tmp; 4122 4123 // Initialize state for next task if needed. 4124 if (top == null || (top.state == ActivityState.INITIALIZING)) { 4125 top = r; 4126 numActivities = numRunning = 0; 4127 } 4128 4129 // Add 'r' into the current task. 4130 numActivities++; 4131 if (r.app != null && r.app.thread != null) { 4132 numRunning++; 4133 } 4134 4135 if (DEBUG_ALL) Slog.v( 4136 TAG, r.intent.getComponent().flattenToShortString() 4137 + ": task=" + r.task); 4138 } 4139 4140 RunningTaskInfo ci = new RunningTaskInfo(); 4141 ci.id = task.taskId; 4142 ci.baseActivity = r.intent.getComponent(); 4143 ci.topActivity = top.intent.getComponent(); 4144 ci.lastActiveTime = task.lastActiveTime; 4145 if (focusedStack && topTask) { 4146 // Give the latest time to ensure foreground task can be sorted 4147 // at the first, because lastActiveTime of creating task is 0. 4148 ci.lastActiveTime = System.currentTimeMillis(); 4149 topTask = false; 4150 } 4151 4152 if (top.task != null) { 4153 ci.description = top.task.lastDescription; 4154 } 4155 ci.numActivities = numActivities; 4156 ci.numRunning = numRunning; 4157 list.add(ci); 4158 } 4159 } 4160 4161 public void unhandledBackLocked() { 4162 final int top = mTaskHistory.size() - 1; 4163 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top); 4164 if (top >= 0) { 4165 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 4166 int activityTop = activities.size() - 1; 4167 if (activityTop > 0) { 4168 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 4169 "unhandled-back", true); 4170 } 4171 } 4172 } 4173 4174 /** 4175 * Reset local parameters because an app's activity died. 4176 * @param app The app of the activity that died. 4177 * @return result from removeHistoryRecordsForAppLocked. 4178 */ 4179 boolean handleAppDiedLocked(ProcessRecord app) { 4180 if (mPausingActivity != null && mPausingActivity.app == app) { 4181 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE, 4182 "App died while pausing: " + mPausingActivity); 4183 mPausingActivity = null; 4184 } 4185 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 4186 mLastPausedActivity = null; 4187 mLastNoHistoryActivity = null; 4188 } 4189 4190 return removeHistoryRecordsForAppLocked(app); 4191 } 4192 4193 void handleAppCrashLocked(ProcessRecord app) { 4194 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4195 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4196 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4197 final ActivityRecord r = activities.get(activityNdx); 4198 if (r.app == app) { 4199 Slog.w(TAG, " Force finishing activity " 4200 + r.intent.getComponent().flattenToShortString()); 4201 // Force the destroy to skip right to removal. 4202 r.app = null; 4203 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4204 } 4205 } 4206 } 4207 } 4208 4209 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4210 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4211 boolean printed = false; 4212 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4213 final TaskRecord task = mTaskHistory.get(taskNdx); 4214 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4215 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4216 dumpClient, dumpPackage, needSep, header, 4217 " Task id #" + task.taskId); 4218 if (printed) { 4219 header = null; 4220 } 4221 } 4222 return printed; 4223 } 4224 4225 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4226 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4227 4228 if ("all".equals(name)) { 4229 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4230 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4231 } 4232 } else if ("top".equals(name)) { 4233 final int top = mTaskHistory.size() - 1; 4234 if (top >= 0) { 4235 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4236 int listTop = list.size() - 1; 4237 if (listTop >= 0) { 4238 activities.add(list.get(listTop)); 4239 } 4240 } 4241 } else { 4242 ItemMatcher matcher = new ItemMatcher(); 4243 matcher.build(name); 4244 4245 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4246 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4247 if (matcher.match(r1, r1.intent.getComponent())) { 4248 activities.add(r1); 4249 } 4250 } 4251 } 4252 } 4253 4254 return activities; 4255 } 4256 4257 ActivityRecord restartPackage(String packageName) { 4258 ActivityRecord starting = topRunningActivityLocked(null); 4259 4260 // All activities that came from the package must be 4261 // restarted as if there was a config change. 4262 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4263 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4264 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4265 final ActivityRecord a = activities.get(activityNdx); 4266 if (a.info.packageName.equals(packageName)) { 4267 a.forceNewConfig = true; 4268 if (starting != null && a == starting && a.visible) { 4269 a.startFreezingScreenLocked(starting.app, 4270 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4271 } 4272 } 4273 } 4274 } 4275 4276 return starting; 4277 } 4278 4279 void removeTask(TaskRecord task, String reason) { 4280 removeTask(task, reason, true /* notMoving */); 4281 } 4282 4283 /** 4284 * Removes the input task from this stack. 4285 * @param task to remove. 4286 * @param reason for removal. 4287 * @param notMoving task to another stack. In the case we are moving we don't want to perform 4288 * some operations on the task like removing it from window manager or recents. 4289 */ 4290 void removeTask(TaskRecord task, String reason, boolean notMoving) { 4291 if (notMoving) { 4292 mStackSupervisor.removeLockedTaskLocked(task); 4293 mWindowManager.removeTask(task.taskId); 4294 } 4295 4296 final ActivityRecord r = mResumedActivity; 4297 if (r != null && r.task == task) { 4298 mResumedActivity = null; 4299 } 4300 4301 final int taskNdx = mTaskHistory.indexOf(task); 4302 final int topTaskNdx = mTaskHistory.size() - 1; 4303 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4304 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4305 if (!nextTask.isOverHomeStack()) { 4306 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4307 } 4308 } 4309 mTaskHistory.remove(task); 4310 updateTaskMovement(task, true); 4311 4312 if (notMoving && task.mActivities.isEmpty()) { 4313 final boolean isVoiceSession = task.voiceSession != null; 4314 if (isVoiceSession) { 4315 try { 4316 task.voiceSession.taskFinished(task.intent, task.taskId); 4317 } catch (RemoteException e) { 4318 } 4319 } 4320 if (task.autoRemoveFromRecents() || isVoiceSession) { 4321 // Task creator asked to remove this when done, or this task was a voice 4322 // interaction, so it should not remain on the recent tasks list. 4323 mRecentTasks.remove(task); 4324 task.removedFromRecents(); 4325 } 4326 } 4327 4328 if (mTaskHistory.isEmpty()) { 4329 if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this); 4330 final boolean notHomeStack = !isHomeStack(); 4331 if (isOnHomeDisplay()) { 4332 String myReason = reason + " leftTaskHistoryEmpty"; 4333 if (mFullscreen || !adjustFocusToNextVisibleStackLocked(null, myReason)) { 4334 mStackSupervisor.moveHomeStack(notHomeStack, myReason); 4335 } 4336 } 4337 if (mStacks != null) { 4338 mStacks.remove(this); 4339 mStacks.add(0, this); 4340 } 4341 if (notHomeStack) { 4342 mActivityContainer.onTaskListEmptyLocked(); 4343 } 4344 } 4345 4346 task.stack = null; 4347 } 4348 4349 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4350 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4351 boolean toTop) { 4352 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4353 voiceInteractor); 4354 addTask(task, toTop, false); 4355 return task; 4356 } 4357 4358 ArrayList<TaskRecord> getAllTasks() { 4359 return new ArrayList<>(mTaskHistory); 4360 } 4361 4362 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4363 task.stack = this; 4364 if (toTop) { 4365 insertTaskAtTop(task, null); 4366 } else { 4367 mTaskHistory.add(0, task); 4368 updateTaskMovement(task, false); 4369 } 4370 if (!moving && task.voiceSession != null) { 4371 try { 4372 task.voiceSession.taskStarted(task.intent, task.taskId); 4373 } catch (RemoteException e) { 4374 } 4375 } 4376 } 4377 4378 public int getStackId() { 4379 return mStackId; 4380 } 4381 4382 @Override 4383 public String toString() { 4384 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4385 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4386 } 4387 4388 boolean updateOverrideConfiguration(Configuration newConfig) { 4389 Configuration oldConfig = mOverrideConfig; 4390 mOverrideConfig = (newConfig == null) ? Configuration.EMPTY : newConfig; 4391 // We override the configuration only when the stack's dimensions are different from 4392 // the display. In this manner, we know that if the override configuration is empty, 4393 // the stack is necessarily full screen. 4394 mFullscreen = Configuration.EMPTY.equals(mOverrideConfig); 4395 return !mOverrideConfig.equals(oldConfig); 4396 } 4397 4398 void onLockTaskPackagesUpdatedLocked() { 4399 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4400 mTaskHistory.get(taskNdx).setLockTaskAuth(); 4401 } 4402 } 4403} 4404