ActivityStack.java revision 925e2b335237153648ecad84d5fa280669f4cf1a
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.am; 18 19import static com.android.server.am.ActivityManagerService.TAG; 20import static com.android.server.am.ActivityManagerService.localLOGV; 21import static com.android.server.am.ActivityManagerService.DEBUG_CLEANUP; 22import static com.android.server.am.ActivityManagerService.DEBUG_CONFIGURATION; 23import static com.android.server.am.ActivityManagerService.DEBUG_PAUSE; 24import static com.android.server.am.ActivityManagerService.DEBUG_RESULTS; 25import static com.android.server.am.ActivityManagerService.DEBUG_STACK; 26import static com.android.server.am.ActivityManagerService.DEBUG_SWITCH; 27import static com.android.server.am.ActivityManagerService.DEBUG_TASKS; 28import static com.android.server.am.ActivityManagerService.DEBUG_TRANSITION; 29import static com.android.server.am.ActivityManagerService.DEBUG_USER_LEAVING; 30import static com.android.server.am.ActivityManagerService.DEBUG_VISBILITY; 31import static com.android.server.am.ActivityManagerService.VALIDATE_TOKENS; 32 33import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 34import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 35 36import static com.android.server.am.ActivityStackSupervisor.DEBUG_ADD_REMOVE; 37import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP; 38import static com.android.server.am.ActivityStackSupervisor.DEBUG_CONTAINERS; 39import static com.android.server.am.ActivityStackSupervisor.DEBUG_RELEASE; 40import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 41import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS; 42import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 43import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 44 45import android.util.ArraySet; 46import com.android.internal.app.IVoiceInteractor; 47import com.android.internal.os.BatteryStatsImpl; 48import com.android.server.Watchdog; 49import com.android.server.am.ActivityManagerService.ItemMatcher; 50import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 51import com.android.server.wm.AppTransition; 52import com.android.server.wm.TaskGroup; 53import com.android.server.wm.WindowManagerService; 54 55import android.app.Activity; 56import android.app.ActivityManager; 57import android.app.ActivityOptions; 58import android.app.AppGlobals; 59import android.app.IActivityController; 60import android.app.ResultInfo; 61import android.app.ActivityManager.RunningTaskInfo; 62import android.content.ComponentName; 63import android.content.Intent; 64import android.content.pm.ActivityInfo; 65import android.content.pm.PackageManager; 66import android.content.res.Configuration; 67import android.content.res.Resources; 68import android.graphics.Bitmap; 69import android.net.Uri; 70import android.os.Binder; 71import android.os.Bundle; 72import android.os.Debug; 73import android.os.Handler; 74import android.os.IBinder; 75import android.os.Looper; 76import android.os.Message; 77import android.os.PersistableBundle; 78import android.os.RemoteException; 79import android.os.SystemClock; 80import android.os.Trace; 81import android.os.UserHandle; 82import android.service.voice.IVoiceInteractionSession; 83import android.util.EventLog; 84import android.util.Slog; 85import android.view.Display; 86 87import java.io.FileDescriptor; 88import java.io.PrintWriter; 89import java.lang.ref.WeakReference; 90import java.util.ArrayList; 91import java.util.Iterator; 92import java.util.List; 93import java.util.Objects; 94 95/** 96 * State and management of a single stack of activities. 97 */ 98final class ActivityStack { 99 100 // Ticks during which we check progress while waiting for an app to launch. 101 static final int LAUNCH_TICK = 500; 102 103 // How long we wait until giving up on the last activity to pause. This 104 // is short because it directly impacts the responsiveness of starting the 105 // next activity. 106 static final int PAUSE_TIMEOUT = 500; 107 108 // How long we wait for the activity to tell us it has stopped before 109 // giving up. This is a good amount of time because we really need this 110 // from the application in order to get its saved state. 111 static final int STOP_TIMEOUT = 10*1000; 112 113 // How long we wait until giving up on an activity telling us it has 114 // finished destroying itself. 115 static final int DESTROY_TIMEOUT = 10*1000; 116 117 // How long until we reset a task when the user returns to it. Currently 118 // disabled. 119 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 120 121 // How long between activity launches that we consider safe to not warn 122 // the user about an unexpected activity being launched on top. 123 static final long START_WARN_TIME = 5*1000; 124 125 // Set to false to disable the preview that is shown while a new activity 126 // is being started. 127 static final boolean SHOW_APP_STARTING_PREVIEW = true; 128 129 // How long to wait for all background Activities to redraw following a call to 130 // convertToTranslucent(). 131 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 132 133 static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic(); 134 135 enum ActivityState { 136 INITIALIZING, 137 RESUMED, 138 PAUSING, 139 PAUSED, 140 STOPPING, 141 STOPPED, 142 FINISHING, 143 DESTROYING, 144 DESTROYED 145 } 146 147 final ActivityManagerService mService; 148 final WindowManagerService mWindowManager; 149 150 /** 151 * The back history of all previous (and possibly still 152 * running) activities. It contains #TaskRecord objects. 153 */ 154 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 155 156 /** 157 * Used for validating app tokens with window manager. 158 */ 159 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 160 161 /** 162 * List of running activities, sorted by recent usage. 163 * The first entry in the list is the least recently used. 164 * It contains HistoryRecord objects. 165 */ 166 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 167 168 /** 169 * Animations that for the current transition have requested not to 170 * be considered for the transition animation. 171 */ 172 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 173 174 /** 175 * When we are in the process of pausing an activity, before starting the 176 * next one, this variable holds the activity that is currently being paused. 177 */ 178 ActivityRecord mPausingActivity = null; 179 180 /** 181 * This is the last activity that we put into the paused state. This is 182 * used to determine if we need to do an activity transition while sleeping, 183 * when we normally hold the top activity paused. 184 */ 185 ActivityRecord mLastPausedActivity = null; 186 187 /** 188 * Activities that specify No History must be removed once the user navigates away from them. 189 * If the device goes to sleep with such an activity in the paused state then we save it here 190 * and finish it later if another activity replaces it on wakeup. 191 */ 192 ActivityRecord mLastNoHistoryActivity = null; 193 194 /** 195 * Current activity that is resumed, or null if there is none. 196 */ 197 ActivityRecord mResumedActivity = null; 198 199 /** 200 * This is the last activity that has been started. It is only used to 201 * identify when multiple activities are started at once so that the user 202 * can be warned they may not be in the activity they think they are. 203 */ 204 ActivityRecord mLastStartedActivity = null; 205 206 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 207 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 208 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 209 // Activity in mTranslucentActivityWaiting is notified via 210 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 211 // background activity being drawn then the same call will be made with a true value. 212 ActivityRecord mTranslucentActivityWaiting = null; 213 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 214 new ArrayList<ActivityRecord>(); 215 216 /** 217 * Set when we know we are going to be calling updateConfiguration() 218 * soon, so want to skip intermediate config checks. 219 */ 220 boolean mConfigWillChange; 221 222 long mLaunchStartTime = 0; 223 long mFullyDrawnStartTime = 0; 224 225 /** 226 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 227 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 228 */ 229 private ActivityRecord mLastScreenshotActivity = null; 230 private Bitmap mLastScreenshotBitmap = null; 231 232 int mCurrentUser; 233 234 final int mStackId; 235 final ActivityContainer mActivityContainer; 236 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 237 ArrayList<ActivityStack> mStacks; 238 /** The attached Display's unique identifier, or -1 if detached */ 239 int mDisplayId; 240 241 /** Run all ActivityStacks through this */ 242 final ActivityStackSupervisor mStackSupervisor; 243 244 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 245 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 246 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 247 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 248 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 249 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 250 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 251 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 252 253 static class ScheduleDestroyArgs { 254 final ProcessRecord mOwner; 255 final String mReason; 256 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 257 mOwner = owner; 258 mReason = reason; 259 } 260 } 261 262 final Handler mHandler; 263 264 final class ActivityStackHandler extends Handler { 265 //public Handler() { 266 // if (localLOGV) Slog.v(TAG, "Handler started!"); 267 //} 268 ActivityStackHandler(Looper looper) { 269 super(looper); 270 } 271 272 @Override 273 public void handleMessage(Message msg) { 274 switch (msg.what) { 275 case PAUSE_TIMEOUT_MSG: { 276 ActivityRecord r = (ActivityRecord)msg.obj; 277 // We don't at this point know if the activity is fullscreen, 278 // so we need to be conservative and assume it isn't. 279 Slog.w(TAG, "Activity pause timeout for " + r); 280 synchronized (mService) { 281 if (r.app != null) { 282 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 283 } 284 activityPausedLocked(r.appToken, true, r.persistentState); 285 } 286 } break; 287 case LAUNCH_TICK_MSG: { 288 ActivityRecord r = (ActivityRecord)msg.obj; 289 synchronized (mService) { 290 if (r.continueLaunchTickingLocked()) { 291 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 292 } 293 } 294 } break; 295 case DESTROY_TIMEOUT_MSG: { 296 ActivityRecord r = (ActivityRecord)msg.obj; 297 // We don't at this point know if the activity is fullscreen, 298 // so we need to be conservative and assume it isn't. 299 Slog.w(TAG, "Activity destroy timeout for " + r); 300 synchronized (mService) { 301 activityDestroyedLocked(r != null ? r.appToken : null); 302 } 303 } break; 304 case STOP_TIMEOUT_MSG: { 305 ActivityRecord r = (ActivityRecord)msg.obj; 306 // We don't at this point know if the activity is fullscreen, 307 // so we need to be conservative and assume it isn't. 308 Slog.w(TAG, "Activity stop timeout for " + r); 309 synchronized (mService) { 310 if (r.isInHistory()) { 311 activityStoppedLocked(r, null, null, null); 312 } 313 } 314 } break; 315 case DESTROY_ACTIVITIES_MSG: { 316 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 317 synchronized (mService) { 318 destroyActivitiesLocked(args.mOwner, args.mReason); 319 } 320 } break; 321 case TRANSLUCENT_TIMEOUT_MSG: { 322 synchronized (mService) { 323 notifyActivityDrawnLocked(null); 324 } 325 } break; 326 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 327 synchronized (mService) { 328 final ActivityRecord r = getVisibleBehindActivity(); 329 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 330 if (r != null) { 331 mService.killAppAtUsersRequest(r.app, null); 332 } 333 } 334 } break; 335 } 336 } 337 } 338 339 int numActivities() { 340 int count = 0; 341 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 342 count += mTaskHistory.get(taskNdx).mActivities.size(); 343 } 344 return count; 345 } 346 347 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 348 mActivityContainer = activityContainer; 349 mStackSupervisor = activityContainer.getOuter(); 350 mService = mStackSupervisor.mService; 351 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 352 mWindowManager = mService.mWindowManager; 353 mStackId = activityContainer.mStackId; 354 mCurrentUser = mService.mCurrentUserId; 355 } 356 357 /** 358 * Checks whether the userid is a profile of the current user. 359 */ 360 private boolean isCurrentProfileLocked(int userId) { 361 if (userId == mCurrentUser) return true; 362 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 363 if (mService.mCurrentProfileIds[i] == userId) return true; 364 } 365 return false; 366 } 367 368 boolean okToShowLocked(ActivityRecord r) { 369 return isCurrentProfileLocked(r.userId) 370 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 371 } 372 373 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 374 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 375 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 376 if (r != null) { 377 return r; 378 } 379 } 380 return null; 381 } 382 383 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 384 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 385 final TaskRecord task = mTaskHistory.get(taskNdx); 386 final ArrayList<ActivityRecord> activities = task.mActivities; 387 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 388 ActivityRecord r = activities.get(activityNdx); 389 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 390 return r; 391 } 392 } 393 } 394 return null; 395 } 396 397 /** 398 * This is a simplified version of topRunningActivityLocked that provides a number of 399 * optional skip-over modes. It is intended for use with the ActivityController hook only. 400 * 401 * @param token If non-null, any history records matching this token will be skipped. 402 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 403 * 404 * @return Returns the HistoryRecord of the next activity on the stack. 405 */ 406 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 407 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 408 TaskRecord task = mTaskHistory.get(taskNdx); 409 if (task.taskId == taskId) { 410 continue; 411 } 412 ArrayList<ActivityRecord> activities = task.mActivities; 413 for (int i = activities.size() - 1; i >= 0; --i) { 414 final ActivityRecord r = activities.get(i); 415 // Note: the taskId check depends on real taskId fields being non-zero 416 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 417 return r; 418 } 419 } 420 } 421 return null; 422 } 423 424 final ActivityRecord topActivity() { 425 // Iterate to find the first non-empty task stack. Note that this code can 426 // be simplified once we stop storing tasks with empty mActivities lists. 427 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 428 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 429 final int topActivityNdx = activities.size() - 1; 430 if (topActivityNdx >= 0) { 431 return activities.get(topActivityNdx); 432 } 433 } 434 return null; 435 } 436 437 final TaskRecord topTask() { 438 final int size = mTaskHistory.size(); 439 if (size > 0) { 440 return mTaskHistory.get(size - 1); 441 } 442 return null; 443 } 444 445 TaskRecord taskForIdLocked(int id) { 446 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 447 final TaskRecord task = mTaskHistory.get(taskNdx); 448 if (task.taskId == id) { 449 return task; 450 } 451 } 452 return null; 453 } 454 455 ActivityRecord isInStackLocked(IBinder token) { 456 final ActivityRecord r = ActivityRecord.forToken(token); 457 if (r != null) { 458 final TaskRecord task = r.task; 459 if (task != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 460 if (task.stack != this) Slog.w(TAG, 461 "Illegal state! task does not point to stack it is in."); 462 return r; 463 } 464 } 465 return null; 466 } 467 468 final boolean updateLRUListLocked(ActivityRecord r) { 469 final boolean hadit = mLRUActivities.remove(r); 470 mLRUActivities.add(r); 471 return hadit; 472 } 473 474 final boolean isHomeStack() { 475 return mStackId == HOME_STACK_ID; 476 } 477 478 final boolean isOnHomeDisplay() { 479 return isAttached() && 480 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 481 } 482 483 final void moveToFront() { 484 if (isAttached()) { 485 if (isOnHomeDisplay()) { 486 mStackSupervisor.moveHomeStack(isHomeStack()); 487 } 488 mStacks.remove(this); 489 mStacks.add(this); 490 } 491 } 492 493 final boolean isAttached() { 494 return mStacks != null; 495 } 496 497 /** 498 * Returns the top activity in any existing task matching the given 499 * Intent. Returns null if no such task is found. 500 */ 501 ActivityRecord findTaskLocked(ActivityRecord target) { 502 Intent intent = target.intent; 503 ActivityInfo info = target.info; 504 ComponentName cls = intent.getComponent(); 505 if (info.targetActivity != null) { 506 cls = new ComponentName(info.packageName, info.targetActivity); 507 } 508 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 509 boolean isDocument = intent != null & intent.isDocument(); 510 // If documentData is non-null then it must match the existing task data. 511 Uri documentData = isDocument ? intent.getData() : null; 512 513 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 514 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 515 final TaskRecord task = mTaskHistory.get(taskNdx); 516 if (task.voiceSession != null) { 517 // We never match voice sessions; those always run independently. 518 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 519 continue; 520 } 521 if (task.userId != userId) { 522 // Looking for a different task. 523 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 524 continue; 525 } 526 final ActivityRecord r = task.getTopActivity(); 527 if (r == null || r.finishing || r.userId != userId || 528 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 529 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 530 continue; 531 } 532 533 final Intent taskIntent = task.intent; 534 final Intent affinityIntent = task.affinityIntent; 535 final boolean taskIsDocument; 536 final Uri taskDocumentData; 537 if (taskIntent != null && taskIntent.isDocument()) { 538 taskIsDocument = true; 539 taskDocumentData = taskIntent.getData(); 540 } else if (affinityIntent != null && affinityIntent.isDocument()) { 541 taskIsDocument = true; 542 taskDocumentData = affinityIntent.getData(); 543 } else { 544 taskIsDocument = false; 545 taskDocumentData = null; 546 } 547 548 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 549 + taskIntent.getComponent().flattenToShortString() 550 + "/aff=" + r.task.affinity + " to new cls=" 551 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 552 if (!isDocument && !taskIsDocument && task.affinity != null) { 553 if (task.affinity.equals(target.taskAffinity)) { 554 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 555 return r; 556 } 557 } else if (taskIntent != null && taskIntent.getComponent() != null && 558 taskIntent.getComponent().compareTo(cls) == 0 && 559 Objects.equals(documentData, taskDocumentData)) { 560 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 561 //dump(); 562 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 563 + r.intent); 564 return r; 565 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 566 affinityIntent.getComponent().compareTo(cls) == 0 && 567 Objects.equals(documentData, taskDocumentData)) { 568 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 569 //dump(); 570 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 571 + r.intent); 572 return r; 573 } else if (DEBUG_TASKS) { 574 Slog.d(TAG, "Not a match: " + task); 575 } 576 } 577 578 return null; 579 } 580 581 /** 582 * Returns the first activity (starting from the top of the stack) that 583 * is the same as the given activity. Returns null if no such activity 584 * is found. 585 */ 586 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 587 ComponentName cls = intent.getComponent(); 588 if (info.targetActivity != null) { 589 cls = new ComponentName(info.packageName, info.targetActivity); 590 } 591 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 592 593 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 594 TaskRecord task = mTaskHistory.get(taskNdx); 595 if (!isCurrentProfileLocked(task.userId)) { 596 return null; 597 } 598 final ArrayList<ActivityRecord> activities = task.mActivities; 599 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 600 ActivityRecord r = activities.get(activityNdx); 601 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 602 //Slog.i(TAG, "Found matching class!"); 603 //dump(); 604 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 605 return r; 606 } 607 } 608 } 609 610 return null; 611 } 612 613 /* 614 * Move the activities around in the stack to bring a user to the foreground. 615 */ 616 final void switchUserLocked(int userId) { 617 if (mCurrentUser == userId) { 618 return; 619 } 620 mCurrentUser = userId; 621 622 // Move userId's tasks to the top. 623 int index = mTaskHistory.size(); 624 for (int i = 0; i < index; ) { 625 TaskRecord task = mTaskHistory.get(i); 626 if (isCurrentProfileLocked(task.userId)) { 627 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 628 " moving " + task + " to top"); 629 mTaskHistory.remove(i); 630 mTaskHistory.add(task); 631 --index; 632 // Use same value for i. 633 } else { 634 ++i; 635 } 636 } 637 if (VALIDATE_TOKENS) { 638 validateAppTokensLocked(); 639 } 640 } 641 642 void minimalResumeActivityLocked(ActivityRecord r) { 643 r.state = ActivityState.RESUMED; 644 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 645 + " (starting new instance)"); 646 r.stopped = false; 647 mResumedActivity = r; 648 r.task.touchActiveTime(); 649 mService.addRecentTaskLocked(r.task); 650 completeResumeLocked(r); 651 mStackSupervisor.checkReadyForSleepLocked(); 652 setLaunchTime(r); 653 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 654 } 655 656 private void startLaunchTraces() { 657 if (mFullyDrawnStartTime != 0) { 658 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 659 } 660 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 661 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 662 } 663 664 private void stopFullyDrawnTraceIfNeeded() { 665 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 666 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 667 mFullyDrawnStartTime = 0; 668 } 669 } 670 671 void setLaunchTime(ActivityRecord r) { 672 if (r.displayStartTime == 0) { 673 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 674 if (mLaunchStartTime == 0) { 675 startLaunchTraces(); 676 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 677 } 678 } else if (mLaunchStartTime == 0) { 679 startLaunchTraces(); 680 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 681 } 682 } 683 684 void clearLaunchTime(ActivityRecord r) { 685 // Make sure that there is no activity waiting for this to launch. 686 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 687 r.displayStartTime = r.fullyDrawnStartTime = 0; 688 } else { 689 mStackSupervisor.removeTimeoutsForActivityLocked(r); 690 mStackSupervisor.scheduleIdleTimeoutLocked(r); 691 } 692 } 693 694 void awakeFromSleepingLocked() { 695 // Ensure activities are no longer sleeping. 696 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 697 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 698 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 699 activities.get(activityNdx).setSleeping(false); 700 } 701 } 702 } 703 704 /** 705 * @return true if something must be done before going to sleep. 706 */ 707 boolean checkReadyForSleepLocked() { 708 if (mResumedActivity != null) { 709 // Still have something resumed; can't sleep until it is paused. 710 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 711 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 712 startPausingLocked(false, true); 713 return true; 714 } 715 if (mPausingActivity != null) { 716 // Still waiting for something to pause; can't sleep yet. 717 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 718 return true; 719 } 720 721 return false; 722 } 723 724 void goToSleep() { 725 ensureActivitiesVisibleLocked(null, 0); 726 727 // Make sure any stopped but visible activities are now sleeping. 728 // This ensures that the activity's onStop() is called. 729 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 730 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 731 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 732 final ActivityRecord r = activities.get(activityNdx); 733 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 734 r.setSleeping(true); 735 } 736 } 737 } 738 } 739 740 /** 741 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 742 * again when requested. 743 */ 744 private void invalidateLastScreenshot() { 745 mLastScreenshotActivity = null; 746 if (mLastScreenshotBitmap != null) { 747 mLastScreenshotBitmap.recycle(); 748 } 749 mLastScreenshotBitmap = null; 750 } 751 752 public final Bitmap screenshotActivities(ActivityRecord who) { 753 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 754 if (who.noDisplay) { 755 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 756 return null; 757 } 758 759 if (isHomeStack()) { 760 // This is an optimization -- since we never show Home or Recents within Recents itself, 761 // we can just go ahead and skip taking the screenshot if this is the home stack. In 762 // the case where the most recent task is not the task that was supplied, then the stack 763 // has changed, so invalidate the last screenshot(). 764 invalidateLastScreenshot(); 765 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 766 return null; 767 } 768 769 int w = mService.mThumbnailWidth; 770 int h = mService.mThumbnailHeight; 771 if (w > 0) { 772 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 773 || mLastScreenshotActivity.state == ActivityState.RESUMED 774 || mLastScreenshotBitmap.getWidth() != w 775 || mLastScreenshotBitmap.getHeight() != h) { 776 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 777 mLastScreenshotActivity = who; 778 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 779 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 780 } 781 if (mLastScreenshotBitmap != null) { 782 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 783 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 784 } 785 } 786 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 787 return null; 788 } 789 790 final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { 791 if (mPausingActivity != null) { 792 Slog.e(TAG, "Trying to pause when pause is already pending for " 793 + mPausingActivity, new RuntimeException("here").fillInStackTrace()); 794 } 795 ActivityRecord prev = mResumedActivity; 796 if (prev == null) { 797 Slog.e(TAG, "Trying to pause when nothing is resumed", 798 new RuntimeException("here").fillInStackTrace()); 799 mStackSupervisor.resumeTopActivitiesLocked(); 800 return; 801 } 802 803 if (mActivityContainer.mParentActivity == null) { 804 // Top level stack, not a child. Look for child stacks. 805 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping); 806 } 807 808 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 809 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 810 mResumedActivity = null; 811 mPausingActivity = prev; 812 mLastPausedActivity = prev; 813 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 814 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 815 prev.state = ActivityState.PAUSING; 816 prev.task.touchActiveTime(); 817 clearLaunchTime(prev); 818 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 819 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task)) { 820 prev.updateThumbnail(screenshotActivities(prev), null); 821 } 822 stopFullyDrawnTraceIfNeeded(); 823 824 mService.updateCpuStats(); 825 826 if (prev.app != null && prev.app.thread != null) { 827 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 828 try { 829 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 830 prev.userId, System.identityHashCode(prev), 831 prev.shortComponentName); 832 mService.updateUsageStats(prev, false); 833 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 834 userLeaving, prev.configChangeFlags); 835 } catch (Exception e) { 836 // Ignore exception, if process died other code will cleanup. 837 Slog.w(TAG, "Exception thrown during pause", e); 838 mPausingActivity = null; 839 mLastPausedActivity = null; 840 mLastNoHistoryActivity = null; 841 } 842 } else { 843 mPausingActivity = null; 844 mLastPausedActivity = null; 845 mLastNoHistoryActivity = null; 846 } 847 848 // If we are not going to sleep, we want to ensure the device is 849 // awake until the next activity is started. 850 if (!mService.isSleepingOrShuttingDown()) { 851 mStackSupervisor.acquireLaunchWakelock(); 852 } 853 854 if (mPausingActivity != null) { 855 // Have the window manager pause its key dispatching until the new 856 // activity has started. If we're pausing the activity just because 857 // the screen is being turned off and the UI is sleeping, don't interrupt 858 // key dispatch; the same activity will pick it up again on wakeup. 859 if (!uiSleeping) { 860 prev.pauseKeyDispatchingLocked(); 861 } else { 862 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 863 } 864 865 // Schedule a pause timeout in case the app doesn't respond. 866 // We don't give it much time because this directly impacts the 867 // responsiveness seen by the user. 868 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 869 msg.obj = prev; 870 prev.pauseTime = SystemClock.uptimeMillis(); 871 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 872 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 873 } else { 874 // This activity failed to schedule the 875 // pause, so just treat it as being paused now. 876 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 877 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 878 } 879 } 880 881 final void activityPausedLocked(IBinder token, boolean timeout, 882 PersistableBundle persistentState) { 883 if (DEBUG_PAUSE) Slog.v( 884 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 885 886 final ActivityRecord r = isInStackLocked(token); 887 if (r != null) { 888 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 889 if (persistentState != null) { 890 r.persistentState = persistentState; 891 mService.notifyTaskPersisterLocked(r.task, false); 892 } 893 if (mPausingActivity == r) { 894 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 895 + (timeout ? " (due to timeout)" : " (pause complete)")); 896 r.state = ActivityState.PAUSED; 897 completePauseLocked(); 898 } else { 899 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 900 r.userId, System.identityHashCode(r), r.shortComponentName, 901 mPausingActivity != null 902 ? mPausingActivity.shortComponentName : "(none)"); 903 } 904 } 905 } 906 907 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 908 PersistableBundle persistentState, CharSequence description) { 909 if (r.state != ActivityState.STOPPING) { 910 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 911 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 912 return; 913 } 914 if (persistentState != null) { 915 r.persistentState = persistentState; 916 mService.notifyTaskPersisterLocked(r.task, false); 917 } 918 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 919 if (icicle != null) { 920 // If icicle is null, this is happening due to a timeout, so we 921 // haven't really saved the state. 922 r.icicle = icicle; 923 r.haveState = true; 924 r.launchCount = 0; 925 r.updateThumbnail(null, description); 926 } 927 if (!r.stopped) { 928 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 929 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 930 r.stopped = true; 931 r.state = ActivityState.STOPPED; 932 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 933 mStackSupervisor.requestVisibleBehindLocked(r, false); 934 } 935 if (r.finishing) { 936 r.clearOptionsLocked(); 937 } else { 938 if (r.configDestroy) { 939 destroyActivityLocked(r, true, "stop-config"); 940 mStackSupervisor.resumeTopActivitiesLocked(); 941 } else { 942 mStackSupervisor.updatePreviousProcessLocked(r); 943 } 944 } 945 } 946 } 947 948 private void completePauseLocked() { 949 ActivityRecord prev = mPausingActivity; 950 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 951 952 if (prev != null) { 953 if (prev.finishing) { 954 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 955 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 956 } else if (prev.app != null) { 957 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 958 if (prev.waitingVisible) { 959 prev.waitingVisible = false; 960 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 961 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 962 TAG, "Complete pause, no longer waiting: " + prev); 963 } 964 if (prev.configDestroy) { 965 // The previous is being paused because the configuration 966 // is changing, which means it is actually stopping... 967 // To juggle the fact that we are also starting a new 968 // instance right now, we need to first completely stop 969 // the current instance before starting the new one. 970 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 971 destroyActivityLocked(prev, true, "pause-config"); 972 } else if (!hasVisibleBehindActivity()) { 973 // If we were visible then resumeTopActivities will release resources before 974 // stopping. 975 mStackSupervisor.mStoppingActivities.add(prev); 976 if (mStackSupervisor.mStoppingActivities.size() > 3 || 977 prev.frontOfTask && mTaskHistory.size() <= 1) { 978 // If we already have a few activities waiting to stop, 979 // then give up on things going idle and start clearing 980 // them out. Or if r is the last of activity of the last task the stack 981 // will be empty and must be cleared immediately. 982 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 983 mStackSupervisor.scheduleIdleLocked(); 984 } else { 985 mStackSupervisor.checkReadyForSleepLocked(); 986 } 987 } 988 } else { 989 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 990 prev = null; 991 } 992 mPausingActivity = null; 993 } 994 995 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 996 if (!mService.isSleepingOrShuttingDown()) { 997 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 998 } else { 999 mStackSupervisor.checkReadyForSleepLocked(); 1000 ActivityRecord top = topStack.topRunningActivityLocked(null); 1001 if (top == null || (prev != null && top != prev)) { 1002 // If there are no more activities available to run, 1003 // do resume anyway to start something. Also if the top 1004 // activity on the stack is not the just paused activity, 1005 // we need to go ahead and resume it to ensure we complete 1006 // an in-flight app switch. 1007 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1008 } 1009 } 1010 1011 if (prev != null) { 1012 prev.resumeKeyDispatchingLocked(); 1013 1014 if (prev.app != null && prev.cpuTimeAtResume > 0 1015 && mService.mBatteryStatsService.isOnBattery()) { 1016 long diff; 1017 synchronized (mService.mProcessCpuThread) { 1018 diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1019 - prev.cpuTimeAtResume; 1020 } 1021 if (diff > 0) { 1022 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1023 synchronized (bsi) { 1024 BatteryStatsImpl.Uid.Proc ps = 1025 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1026 prev.info.packageName); 1027 if (ps != null) { 1028 ps.addForegroundTimeLocked(diff); 1029 } 1030 } 1031 } 1032 } 1033 prev.cpuTimeAtResume = 0; // reset it 1034 } 1035 } 1036 1037 /** 1038 * Once we know that we have asked an application to put an activity in 1039 * the resumed state (either by launching it or explicitly telling it), 1040 * this function updates the rest of our state to match that fact. 1041 */ 1042 private void completeResumeLocked(ActivityRecord next) { 1043 next.idle = false; 1044 next.results = null; 1045 next.newIntents = null; 1046 1047 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1048 ProcessRecord app = next.task.mActivities.get(0).app; 1049 if (app != null && app != mService.mHomeProcess) { 1050 mService.mHomeProcess = app; 1051 } 1052 } 1053 1054 if (next.nowVisible) { 1055 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1056 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1057 } 1058 1059 // schedule an idle timeout in case the app doesn't do it for us. 1060 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1061 1062 mStackSupervisor.reportResumedActivityLocked(next); 1063 1064 next.resumeKeyDispatchingLocked(); 1065 mNoAnimActivities.clear(); 1066 1067 // Mark the point when the activity is resuming 1068 // TODO: To be more accurate, the mark should be before the onCreate, 1069 // not after the onResume. But for subsequent starts, onResume is fine. 1070 if (next.app != null) { 1071 synchronized (mService.mProcessCpuThread) { 1072 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1073 } 1074 } else { 1075 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1076 } 1077 1078 // If we are resuming the activity that we had last screenshotted, then we know it will be 1079 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1080 if (next == mLastScreenshotActivity) { 1081 invalidateLastScreenshot(); 1082 } 1083 next.returningOptions = null; 1084 } 1085 1086 private void setVisibile(ActivityRecord r, boolean visible) { 1087 r.visible = visible; 1088 mWindowManager.setAppVisibility(r.appToken, visible); 1089 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1090 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1091 ActivityContainer container = containers.get(containerNdx); 1092 container.setVisible(visible); 1093 } 1094 } 1095 1096 // Find the first visible activity above the passed activity and if it is translucent return it 1097 // otherwise return null; 1098 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1099 TaskRecord task = r.task; 1100 if (task == null) { 1101 return null; 1102 } 1103 1104 ActivityStack stack = task.stack; 1105 if (stack == null) { 1106 return null; 1107 } 1108 1109 int stackNdx = mStacks.indexOf(stack); 1110 1111 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1112 int taskNdx = tasks.indexOf(task); 1113 1114 ArrayList<ActivityRecord> activities = task.mActivities; 1115 int activityNdx = activities.indexOf(r) + 1; 1116 1117 final int numStacks = mStacks.size(); 1118 while (stackNdx < numStacks) { 1119 tasks = mStacks.get(stackNdx).mTaskHistory; 1120 final int numTasks = tasks.size(); 1121 while (taskNdx < numTasks) { 1122 activities = tasks.get(taskNdx).mActivities; 1123 final int numActivities = activities.size(); 1124 while (activityNdx < numActivities) { 1125 final ActivityRecord activity = activities.get(activityNdx); 1126 if (!activity.finishing) { 1127 return activity.fullscreen ? null : activity; 1128 } 1129 ++activityNdx; 1130 } 1131 activityNdx = 0; 1132 ++taskNdx; 1133 } 1134 taskNdx = 0; 1135 ++stackNdx; 1136 } 1137 1138 return null; 1139 } 1140 1141 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1142 // If so, this stack is hidden, otherwise it is visible. 1143 private boolean isStackVisible() { 1144 if (!isAttached()) { 1145 return false; 1146 } 1147 1148 if (mStackSupervisor.isFrontStack(this)) { 1149 return true; 1150 } 1151 1152 /** 1153 * Start at the task above this one and go up, looking for a visible 1154 * fullscreen activity, or a translucent activity that requested the 1155 * wallpaper to be shown behind it. 1156 */ 1157 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1158 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1159 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1160 final TaskRecord task = tasks.get(taskNdx); 1161 final ArrayList<ActivityRecord> activities = task.mActivities; 1162 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1163 final ActivityRecord r = activities.get(activityNdx); 1164 1165 // Conditions for an activity to obscure the stack we're 1166 // examining: 1167 // 1. Not Finishing AND Visible AND: 1168 // 2. Either: 1169 // - Full Screen Activity OR 1170 // - On top of Home and our stack is NOT home 1171 if (!r.finishing && r.visible && (r.fullscreen || 1172 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1173 return false; 1174 } 1175 } 1176 } 1177 } 1178 1179 return true; 1180 } 1181 1182 /** 1183 * Make sure that all activities that need to be visible (that is, they 1184 * currently can be seen by the user) actually are. 1185 */ 1186 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1187 ActivityRecord top = topRunningActivityLocked(null); 1188 if (top == null) { 1189 return; 1190 } 1191 if (DEBUG_VISBILITY) Slog.v( 1192 TAG, "ensureActivitiesVisible behind " + top 1193 + " configChanges=0x" + Integer.toHexString(configChanges)); 1194 1195 if (mTranslucentActivityWaiting != top) { 1196 mUndrawnActivitiesBelowTopTranslucent.clear(); 1197 if (mTranslucentActivityWaiting != null) { 1198 // Call the callback with a timeout indication. 1199 notifyActivityDrawnLocked(null); 1200 mTranslucentActivityWaiting = null; 1201 } 1202 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1203 } 1204 1205 // If the top activity is not fullscreen, then we need to 1206 // make sure any activities under it are now visible. 1207 boolean aboveTop = true; 1208 boolean behindFullscreen = !isStackVisible(); 1209 1210 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1211 final TaskRecord task = mTaskHistory.get(taskNdx); 1212 final ArrayList<ActivityRecord> activities = task.mActivities; 1213 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1214 final ActivityRecord r = activities.get(activityNdx); 1215 if (r.finishing) { 1216 continue; 1217 } 1218 if (aboveTop && r != top) { 1219 continue; 1220 } 1221 aboveTop = false; 1222 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1223 // but must be drawn initially for the animation as though they were visible. 1224 if (!behindFullscreen || r.mLaunchTaskBehind) { 1225 if (DEBUG_VISBILITY) Slog.v( 1226 TAG, "Make visible? " + r + " finishing=" + r.finishing 1227 + " state=" + r.state); 1228 1229 // First: if this is not the current activity being started, make 1230 // sure it matches the current configuration. 1231 if (r != starting) { 1232 ensureActivityConfigurationLocked(r, 0); 1233 } 1234 1235 if (r.app == null || r.app.thread == null) { 1236 // This activity needs to be visible, but isn't even 1237 // running... get it started, but don't resume it 1238 // at this point. 1239 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1240 if (r != starting) { 1241 r.startFreezingScreenLocked(r.app, configChanges); 1242 } 1243 if (!r.visible || r.mLaunchTaskBehind) { 1244 if (DEBUG_VISBILITY) Slog.v( 1245 TAG, "Starting and making visible: " + r); 1246 setVisibile(r, true); 1247 } 1248 if (r != starting) { 1249 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1250 } 1251 1252 } else if (r.visible) { 1253 // If this activity is already visible, then there is nothing 1254 // else to do here. 1255 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1256 r.stopFreezingScreenLocked(false); 1257 try { 1258 if (r.returningOptions != null) { 1259 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1260 r.returningOptions); 1261 } 1262 } catch(RemoteException e) { 1263 } 1264 } else { 1265 // This activity is not currently visible, but is running. 1266 // Tell it to become visible. 1267 r.visible = true; 1268 if (r.state != ActivityState.RESUMED && r != starting) { 1269 // If this activity is paused, tell it 1270 // to now show its window. 1271 if (DEBUG_VISBILITY) Slog.v( 1272 TAG, "Making visible and scheduling visibility: " + r); 1273 try { 1274 if (mTranslucentActivityWaiting != null) { 1275 r.updateOptionsLocked(r.returningOptions); 1276 mUndrawnActivitiesBelowTopTranslucent.add(r); 1277 } 1278 setVisibile(r, true); 1279 r.sleeping = false; 1280 r.app.pendingUiClean = true; 1281 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1282 r.stopFreezingScreenLocked(false); 1283 } catch (Exception e) { 1284 // Just skip on any failure; we'll make it 1285 // visible when it next restarts. 1286 Slog.w(TAG, "Exception thrown making visibile: " 1287 + r.intent.getComponent(), e); 1288 } 1289 } 1290 } 1291 1292 // Aggregate current change flags. 1293 configChanges |= r.configChangeFlags; 1294 1295 if (r.fullscreen) { 1296 // At this point, nothing else needs to be shown 1297 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1298 behindFullscreen = true; 1299 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1300 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1301 behindFullscreen = true; 1302 } 1303 } else { 1304 if (DEBUG_VISBILITY) Slog.v( 1305 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1306 + " state=" + r.state 1307 + " behindFullscreen=" + behindFullscreen); 1308 // Now for any activities that aren't visible to the user, make 1309 // sure they no longer are keeping the screen frozen. 1310 if (r.visible) { 1311 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1312 try { 1313 setVisibile(r, false); 1314 switch (r.state) { 1315 case STOPPING: 1316 case STOPPED: 1317 if (r.app != null && r.app.thread != null) { 1318 if (DEBUG_VISBILITY) Slog.v( 1319 TAG, "Scheduling invisibility: " + r); 1320 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1321 } 1322 break; 1323 1324 case INITIALIZING: 1325 case RESUMED: 1326 case PAUSING: 1327 case PAUSED: 1328 // This case created for transitioning activities from 1329 // translucent to opaque {@link Activity#convertToOpaque}. 1330 if (getVisibleBehindActivity() == r) { 1331 releaseBackgroundResources(); 1332 } else { 1333 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1334 mStackSupervisor.mStoppingActivities.add(r); 1335 } 1336 mStackSupervisor.scheduleIdleLocked(); 1337 } 1338 break; 1339 1340 default: 1341 break; 1342 } 1343 } catch (Exception e) { 1344 // Just skip on any failure; we'll make it 1345 // visible when it next restarts. 1346 Slog.w(TAG, "Exception thrown making hidden: " 1347 + r.intent.getComponent(), e); 1348 } 1349 } else { 1350 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1351 } 1352 } 1353 } 1354 } 1355 1356 if (mTranslucentActivityWaiting != null && 1357 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1358 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1359 notifyActivityDrawnLocked(null); 1360 } 1361 } 1362 1363 void convertToTranslucent(ActivityRecord r) { 1364 mTranslucentActivityWaiting = r; 1365 mUndrawnActivitiesBelowTopTranslucent.clear(); 1366 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1367 } 1368 1369 /** 1370 * Called as activities below the top translucent activity are redrawn. When the last one is 1371 * redrawn notify the top activity by calling 1372 * {@link Activity#onTranslucentConversionComplete}. 1373 * 1374 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1375 * occurred and the activity will be notified immediately. 1376 */ 1377 void notifyActivityDrawnLocked(ActivityRecord r) { 1378 mActivityContainer.setDrawn(); 1379 if ((r == null) 1380 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1381 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1382 // The last undrawn activity below the top has just been drawn. If there is an 1383 // opaque activity at the top, notify it that it can become translucent safely now. 1384 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1385 mTranslucentActivityWaiting = null; 1386 mUndrawnActivitiesBelowTopTranslucent.clear(); 1387 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1388 1389 if (waitingActivity != null) { 1390 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1391 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1392 try { 1393 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1394 waitingActivity.appToken, r != null); 1395 } catch (RemoteException e) { 1396 } 1397 } 1398 } 1399 } 1400 } 1401 1402 /** If any activities below the top running one are in the INITIALIZING state and they have a 1403 * starting window displayed then remove that starting window. It is possible that the activity 1404 * in this state will never resumed in which case that starting window will be orphaned. */ 1405 void cancelInitializingActivities() { 1406 final ActivityRecord topActivity = topRunningActivityLocked(null); 1407 boolean aboveTop = true; 1408 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1409 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1410 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1411 final ActivityRecord r = activities.get(activityNdx); 1412 if (aboveTop) { 1413 if (r == topActivity) { 1414 aboveTop = false; 1415 } 1416 continue; 1417 } 1418 1419 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1420 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1421 r.mStartingWindowShown = false; 1422 mWindowManager.removeAppStartingWindow(r.appToken); 1423 } 1424 } 1425 } 1426 } 1427 1428 /** 1429 * Ensure that the top activity in the stack is resumed. 1430 * 1431 * @param prev The previously resumed activity, for when in the process 1432 * of pausing; can be null to call from elsewhere. 1433 * 1434 * @return Returns true if something is being resumed, or false if 1435 * nothing happened. 1436 */ 1437 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1438 return resumeTopActivityLocked(prev, null); 1439 } 1440 1441 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1442 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1443 1444 ActivityRecord parent = mActivityContainer.mParentActivity; 1445 if ((parent != null && parent.state != ActivityState.RESUMED) || 1446 !mActivityContainer.isAttachedLocked()) { 1447 // Do not resume this stack if its parent is not resumed. 1448 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1449 return false; 1450 } 1451 1452 cancelInitializingActivities(); 1453 1454 // Find the first activity that is not finishing. 1455 ActivityRecord next = topRunningActivityLocked(null); 1456 1457 // Remember how we'll process this pause/resume situation, and ensure 1458 // that the state is reset however we wind up proceeding. 1459 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1460 mStackSupervisor.mUserLeaving = false; 1461 1462 final TaskRecord prevTask = prev != null ? prev.task : null; 1463 if (next == null) { 1464 // There are no more activities! Let's just start up the 1465 // Launcher... 1466 ActivityOptions.abort(options); 1467 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1468 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1469 // Only resume home if on home display 1470 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1471 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1472 return isOnHomeDisplay() && 1473 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1474 } 1475 1476 next.delayedResume = false; 1477 1478 // If the top activity is the resumed one, nothing to do. 1479 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1480 mStackSupervisor.allResumedActivitiesComplete()) { 1481 // Make sure we have executed any pending transitions, since there 1482 // should be nothing left to do at this point. 1483 mWindowManager.executeAppTransition(); 1484 mNoAnimActivities.clear(); 1485 ActivityOptions.abort(options); 1486 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1487 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1488 1489 // Make sure to notify Keyguard as well if it is waiting for an activity to be drawn. 1490 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1491 return false; 1492 } 1493 1494 final TaskRecord nextTask = next.task; 1495 if (prevTask != null && prevTask.stack == this && 1496 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1497 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1498 if (prevTask == nextTask) { 1499 prevTask.setFrontOfTask(); 1500 } else if (prevTask != topTask()) { 1501 // This task is going away but it was supposed to return to the home stack. 1502 // Now the task above it has to return to the home task instead. 1503 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1504 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1505 } else { 1506 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1507 "resumeTopActivityLocked: Launching home next"); 1508 // Only resume home if on home display 1509 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1510 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1511 return isOnHomeDisplay() && 1512 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1513 } 1514 } 1515 1516 // If we are sleeping, and there is no resumed activity, and the top 1517 // activity is paused, well that is the state we want. 1518 if (mService.isSleepingOrShuttingDown() 1519 && mLastPausedActivity == next 1520 && mStackSupervisor.allPausedActivitiesComplete()) { 1521 // Make sure we have executed any pending transitions, since there 1522 // should be nothing left to do at this point. 1523 mWindowManager.executeAppTransition(); 1524 mNoAnimActivities.clear(); 1525 ActivityOptions.abort(options); 1526 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1527 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1528 return false; 1529 } 1530 1531 // Make sure that the user who owns this activity is started. If not, 1532 // we will just leave it as is because someone should be bringing 1533 // another user's activities to the top of the stack. 1534 if (mService.mStartedUsers.get(next.userId) == null) { 1535 Slog.w(TAG, "Skipping resume of top activity " + next 1536 + ": user " + next.userId + " is stopped"); 1537 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1538 return false; 1539 } 1540 1541 // The activity may be waiting for stop, but that is no longer 1542 // appropriate for it. 1543 mStackSupervisor.mStoppingActivities.remove(next); 1544 mStackSupervisor.mGoingToSleepActivities.remove(next); 1545 next.sleeping = false; 1546 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1547 1548 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1549 1550 // If we are currently pausing an activity, then don't do anything 1551 // until that is done. 1552 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1553 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1554 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1555 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1556 return false; 1557 } 1558 1559 // Okay we are now going to start a switch, to 'next'. We may first 1560 // have to pause the current activity, but this is an important point 1561 // where we have decided to go to 'next' so keep track of that. 1562 // XXX "App Redirected" dialog is getting too many false positives 1563 // at this point, so turn off for now. 1564 if (false) { 1565 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1566 long now = SystemClock.uptimeMillis(); 1567 final boolean inTime = mLastStartedActivity.startTime != 0 1568 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1569 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1570 final int nextUid = next.info.applicationInfo.uid; 1571 if (inTime && lastUid != nextUid 1572 && lastUid != next.launchedFromUid 1573 && mService.checkPermission( 1574 android.Manifest.permission.STOP_APP_SWITCHES, 1575 -1, next.launchedFromUid) 1576 != PackageManager.PERMISSION_GRANTED) { 1577 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1578 } else { 1579 next.startTime = now; 1580 mLastStartedActivity = next; 1581 } 1582 } else { 1583 next.startTime = SystemClock.uptimeMillis(); 1584 mLastStartedActivity = next; 1585 } 1586 } 1587 1588 // We need to start pausing the current activity so the top one 1589 // can be resumed... 1590 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving); 1591 if (mResumedActivity != null) { 1592 pausing = true; 1593 startPausingLocked(userLeaving, false); 1594 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1595 } 1596 if (pausing) { 1597 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1598 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1599 // At this point we want to put the upcoming activity's process 1600 // at the top of the LRU list, since we know we will be needing it 1601 // very soon and it would be a waste to let it get killed if it 1602 // happens to be sitting towards the end. 1603 if (next.app != null && next.app.thread != null) { 1604 mService.updateLruProcessLocked(next.app, true, null); 1605 } 1606 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1607 return true; 1608 } 1609 1610 // If the most recent activity was noHistory but was only stopped rather 1611 // than stopped+finished because the device went to sleep, we need to make 1612 // sure to finish it as we're making a new activity topmost. 1613 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1614 !mLastNoHistoryActivity.finishing) { 1615 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1616 " on new resume"); 1617 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1618 null, "no-history", false); 1619 mLastNoHistoryActivity = null; 1620 } 1621 1622 if (prev != null && prev != next) { 1623 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1624 prev.waitingVisible = true; 1625 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1626 if (DEBUG_SWITCH) Slog.v( 1627 TAG, "Resuming top, waiting visible to hide: " + prev); 1628 } else { 1629 // The next activity is already visible, so hide the previous 1630 // activity's windows right now so we can show the new one ASAP. 1631 // We only do this if the previous is finishing, which should mean 1632 // it is on top of the one being resumed so hiding it quickly 1633 // is good. Otherwise, we want to do the normal route of allowing 1634 // the resumed activity to be shown so we can decide if the 1635 // previous should actually be hidden depending on whether the 1636 // new one is found to be full-screen or not. 1637 if (prev.finishing) { 1638 mWindowManager.setAppVisibility(prev.appToken, false); 1639 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1640 + prev + ", waitingVisible=" 1641 + (prev != null ? prev.waitingVisible : null) 1642 + ", nowVisible=" + next.nowVisible); 1643 } else { 1644 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1645 + prev + ", waitingVisible=" 1646 + (prev != null ? prev.waitingVisible : null) 1647 + ", nowVisible=" + next.nowVisible); 1648 } 1649 } 1650 } 1651 1652 // Launching this app's activity, make sure the app is no longer 1653 // considered stopped. 1654 try { 1655 AppGlobals.getPackageManager().setPackageStoppedState( 1656 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1657 } catch (RemoteException e1) { 1658 } catch (IllegalArgumentException e) { 1659 Slog.w(TAG, "Failed trying to unstop package " 1660 + next.packageName + ": " + e); 1661 } 1662 1663 // We are starting up the next activity, so tell the window manager 1664 // that the previous one will be hidden soon. This way it can know 1665 // to ignore it when computing the desired screen orientation. 1666 boolean anim = true; 1667 if (prev != null) { 1668 if (prev.finishing) { 1669 if (DEBUG_TRANSITION) Slog.v(TAG, 1670 "Prepare close transition: prev=" + prev); 1671 if (mNoAnimActivities.contains(prev)) { 1672 anim = false; 1673 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1674 } else { 1675 mWindowManager.prepareAppTransition(prev.task == next.task 1676 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1677 : AppTransition.TRANSIT_TASK_CLOSE, false); 1678 } 1679 mWindowManager.setAppWillBeHidden(prev.appToken); 1680 mWindowManager.setAppVisibility(prev.appToken, false); 1681 } else { 1682 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1683 if (mNoAnimActivities.contains(next)) { 1684 anim = false; 1685 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1686 } else { 1687 mWindowManager.prepareAppTransition(prev.task == next.task 1688 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1689 : next.mLaunchTaskBehind 1690 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1691 : AppTransition.TRANSIT_TASK_OPEN, false); 1692 } 1693 } 1694 if (false) { 1695 mWindowManager.setAppWillBeHidden(prev.appToken); 1696 mWindowManager.setAppVisibility(prev.appToken, false); 1697 } 1698 } else { 1699 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1700 if (mNoAnimActivities.contains(next)) { 1701 anim = false; 1702 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1703 } else { 1704 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1705 } 1706 } 1707 1708 Bundle resumeAnimOptions = null; 1709 if (anim) { 1710 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1711 if (opts != null) { 1712 resumeAnimOptions = opts.toBundle(); 1713 } 1714 next.applyOptionsLocked(); 1715 } else { 1716 next.clearOptionsLocked(); 1717 } 1718 1719 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1720 if (next.app != null && next.app.thread != null) { 1721 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1722 1723 // This activity is now becoming visible. 1724 mWindowManager.setAppVisibility(next.appToken, true); 1725 1726 // schedule launch ticks to collect information about slow apps. 1727 next.startLaunchTickingLocked(); 1728 1729 ActivityRecord lastResumedActivity = 1730 lastStack == null ? null :lastStack.mResumedActivity; 1731 ActivityState lastState = next.state; 1732 1733 mService.updateCpuStats(); 1734 1735 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1736 next.state = ActivityState.RESUMED; 1737 mResumedActivity = next; 1738 next.task.touchActiveTime(); 1739 mService.addRecentTaskLocked(next.task); 1740 mService.updateLruProcessLocked(next.app, true, null); 1741 updateLRUListLocked(next); 1742 mService.updateOomAdjLocked(); 1743 1744 // Have the window manager re-evaluate the orientation of 1745 // the screen based on the new activity order. 1746 boolean notUpdated = true; 1747 if (mStackSupervisor.isFrontStack(this)) { 1748 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1749 mService.mConfiguration, 1750 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1751 if (config != null) { 1752 next.frozenBeforeDestroy = true; 1753 } 1754 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1755 } 1756 1757 if (notUpdated) { 1758 // The configuration update wasn't able to keep the existing 1759 // instance of the activity, and instead started a new one. 1760 // We should be all done, but let's just make sure our activity 1761 // is still at the top and schedule another run if something 1762 // weird happened. 1763 ActivityRecord nextNext = topRunningActivityLocked(null); 1764 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1765 "Activity config changed during resume: " + next 1766 + ", new next: " + nextNext); 1767 if (nextNext != next) { 1768 // Do over! 1769 mStackSupervisor.scheduleResumeTopActivities(); 1770 } 1771 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1772 mNoAnimActivities.clear(); 1773 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1774 return true; 1775 } 1776 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1777 return false; 1778 } 1779 1780 try { 1781 // Deliver all pending results. 1782 ArrayList<ResultInfo> a = next.results; 1783 if (a != null) { 1784 final int N = a.size(); 1785 if (!next.finishing && N > 0) { 1786 if (DEBUG_RESULTS) Slog.v( 1787 TAG, "Delivering results to " + next 1788 + ": " + a); 1789 next.app.thread.scheduleSendResult(next.appToken, a); 1790 } 1791 } 1792 1793 if (next.newIntents != null) { 1794 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1795 } 1796 1797 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1798 next.userId, System.identityHashCode(next), 1799 next.task.taskId, next.shortComponentName); 1800 1801 next.sleeping = false; 1802 mService.showAskCompatModeDialogLocked(next); 1803 next.app.pendingUiClean = true; 1804 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1805 next.clearOptionsLocked(); 1806 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1807 mService.isNextTransitionForward(), resumeAnimOptions); 1808 1809 mStackSupervisor.checkReadyForSleepLocked(); 1810 1811 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1812 } catch (Exception e) { 1813 // Whoops, need to restart this activity! 1814 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1815 + lastState + ": " + next); 1816 next.state = lastState; 1817 if (lastStack != null) { 1818 lastStack.mResumedActivity = lastResumedActivity; 1819 } 1820 Slog.i(TAG, "Restarting because process died: " + next); 1821 if (!next.hasBeenLaunched) { 1822 next.hasBeenLaunched = true; 1823 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1824 mStackSupervisor.isFrontStack(lastStack)) { 1825 mWindowManager.setAppStartingWindow( 1826 next.appToken, next.packageName, next.theme, 1827 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1828 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1829 next.windowFlags, null, true); 1830 } 1831 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1832 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1833 return true; 1834 } 1835 1836 // From this point on, if something goes wrong there is no way 1837 // to recover the activity. 1838 try { 1839 next.visible = true; 1840 completeResumeLocked(next); 1841 } catch (Exception e) { 1842 // If any exception gets thrown, toss away this 1843 // activity and try the next one. 1844 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1845 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1846 "resume-exception", true); 1847 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1848 return true; 1849 } 1850 next.stopped = false; 1851 1852 } else { 1853 // Whoops, need to restart this activity! 1854 if (!next.hasBeenLaunched) { 1855 next.hasBeenLaunched = true; 1856 } else { 1857 if (SHOW_APP_STARTING_PREVIEW) { 1858 mWindowManager.setAppStartingWindow( 1859 next.appToken, next.packageName, next.theme, 1860 mService.compatibilityInfoForPackageLocked( 1861 next.info.applicationInfo), 1862 next.nonLocalizedLabel, 1863 next.labelRes, next.icon, next.logo, next.windowFlags, 1864 null, true); 1865 } 1866 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1867 } 1868 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1869 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1870 } 1871 1872 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1873 return true; 1874 } 1875 1876 private void insertTaskAtTop(TaskRecord task) { 1877 // If this is being moved to the top by another activity or being launched from the home 1878 // activity, set mOnTopOfHome accordingly. 1879 if (isOnHomeDisplay()) { 1880 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1881 final boolean fromHome = lastStack.isHomeStack(); 1882 if (!isHomeStack() && (fromHome || topTask() != task)) { 1883 task.setTaskToReturnTo(fromHome 1884 ? lastStack.topTask() == null 1885 ? HOME_ACTIVITY_TYPE 1886 : lastStack.topTask().taskType 1887 : APPLICATION_ACTIVITY_TYPE); 1888 } 1889 } else { 1890 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1891 } 1892 1893 mTaskHistory.remove(task); 1894 // Now put task at top. 1895 int taskNdx = mTaskHistory.size(); 1896 if (!isCurrentProfileLocked(task.userId)) { 1897 // Put non-current user tasks below current user tasks. 1898 while (--taskNdx >= 0) { 1899 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1900 break; 1901 } 1902 } 1903 ++taskNdx; 1904 } 1905 mTaskHistory.add(taskNdx, task); 1906 updateTaskMovement(task, true); 1907 } 1908 1909 final void startActivityLocked(ActivityRecord r, boolean newTask, 1910 boolean doResume, boolean keepCurTransition, Bundle options) { 1911 TaskRecord rTask = r.task; 1912 final int taskId = rTask.taskId; 1913 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1914 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1915 // Last activity in task had been removed or ActivityManagerService is reusing task. 1916 // Insert or replace. 1917 // Might not even be in. 1918 insertTaskAtTop(rTask); 1919 mWindowManager.moveTaskToTop(taskId); 1920 } 1921 TaskRecord task = null; 1922 if (!newTask) { 1923 // If starting in an existing task, find where that is... 1924 boolean startIt = true; 1925 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1926 task = mTaskHistory.get(taskNdx); 1927 if (task.getTopActivity() == null) { 1928 // All activities in task are finishing. 1929 continue; 1930 } 1931 if (task == r.task) { 1932 // Here it is! Now, if this is not yet visible to the 1933 // user, then just add it without starting; it will 1934 // get started when the user navigates back to it. 1935 if (!startIt) { 1936 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1937 + task, new RuntimeException("here").fillInStackTrace()); 1938 task.addActivityToTop(r); 1939 r.putInHistory(); 1940 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1941 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1942 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1943 r.userId, r.info.configChanges, task.voiceSession != null, 1944 r.mLaunchTaskBehind); 1945 if (VALIDATE_TOKENS) { 1946 validateAppTokensLocked(); 1947 } 1948 ActivityOptions.abort(options); 1949 return; 1950 } 1951 break; 1952 } else if (task.numFullscreen > 0) { 1953 startIt = false; 1954 } 1955 } 1956 } 1957 1958 // Place a new activity at top of stack, so it is next to interact 1959 // with the user. 1960 1961 // If we are not placing the new activity frontmost, we do not want 1962 // to deliver the onUserLeaving callback to the actual frontmost 1963 // activity 1964 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1965 mStackSupervisor.mUserLeaving = false; 1966 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1967 "startActivity() behind front, mUserLeaving=false"); 1968 } 1969 1970 task = r.task; 1971 1972 // Slot the activity into the history stack and proceed 1973 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1974 new RuntimeException("here").fillInStackTrace()); 1975 task.addActivityToTop(r); 1976 task.setFrontOfTask(); 1977 1978 r.putInHistory(); 1979 if (!isHomeStack() || numActivities() > 0) { 1980 // We want to show the starting preview window if we are 1981 // switching to a new task, or the next activity's process is 1982 // not currently running. 1983 boolean showStartingIcon = newTask; 1984 ProcessRecord proc = r.app; 1985 if (proc == null) { 1986 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 1987 } 1988 if (proc == null || proc.thread == null) { 1989 showStartingIcon = true; 1990 } 1991 if (DEBUG_TRANSITION) Slog.v(TAG, 1992 "Prepare open transition: starting " + r); 1993 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 1994 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 1995 mNoAnimActivities.add(r); 1996 } else { 1997 mWindowManager.prepareAppTransition(newTask 1998 ? r.mLaunchTaskBehind 1999 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2000 : AppTransition.TRANSIT_TASK_OPEN 2001 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2002 mNoAnimActivities.remove(r); 2003 } 2004 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2005 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2006 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2007 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2008 boolean doShow = true; 2009 if (newTask) { 2010 // Even though this activity is starting fresh, we still need 2011 // to reset it to make sure we apply affinities to move any 2012 // existing activities from other tasks in to it. 2013 // If the caller has requested that the target task be 2014 // reset, then do so. 2015 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2016 resetTaskIfNeededLocked(r, r); 2017 doShow = topRunningNonDelayedActivityLocked(null) == r; 2018 } 2019 } else if (options != null && new ActivityOptions(options).getAnimationType() 2020 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2021 doShow = false; 2022 } 2023 if (r.mLaunchTaskBehind) { 2024 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2025 // tell WindowManager that r is visible even though it is at the back of the stack. 2026 mWindowManager.setAppVisibility(r.appToken, true); 2027 ensureActivitiesVisibleLocked(null, 0); 2028 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2029 // Figure out if we are transitioning from another activity that is 2030 // "has the same starting icon" as the next one. This allows the 2031 // window manager to keep the previous window it had previously 2032 // created, if it still had one. 2033 ActivityRecord prev = mResumedActivity; 2034 if (prev != null) { 2035 // We don't want to reuse the previous starting preview if: 2036 // (1) The current activity is in a different task. 2037 if (prev.task != r.task) { 2038 prev = null; 2039 } 2040 // (2) The current activity is already displayed. 2041 else if (prev.nowVisible) { 2042 prev = null; 2043 } 2044 } 2045 mWindowManager.setAppStartingWindow( 2046 r.appToken, r.packageName, r.theme, 2047 mService.compatibilityInfoForPackageLocked( 2048 r.info.applicationInfo), r.nonLocalizedLabel, 2049 r.labelRes, r.icon, r.logo, r.windowFlags, 2050 prev != null ? prev.appToken : null, showStartingIcon); 2051 r.mStartingWindowShown = true; 2052 } 2053 } else { 2054 // If this is the first activity, don't do any fancy animations, 2055 // because there is nothing for it to animate on top of. 2056 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2057 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2058 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2059 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2060 ActivityOptions.abort(options); 2061 options = null; 2062 } 2063 if (VALIDATE_TOKENS) { 2064 validateAppTokensLocked(); 2065 } 2066 2067 if (doResume) { 2068 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2069 } 2070 } 2071 2072 final void validateAppTokensLocked() { 2073 mValidateAppTokens.clear(); 2074 mValidateAppTokens.ensureCapacity(numActivities()); 2075 final int numTasks = mTaskHistory.size(); 2076 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2077 TaskRecord task = mTaskHistory.get(taskNdx); 2078 final ArrayList<ActivityRecord> activities = task.mActivities; 2079 if (activities.isEmpty()) { 2080 continue; 2081 } 2082 TaskGroup group = new TaskGroup(); 2083 group.taskId = task.taskId; 2084 mValidateAppTokens.add(group); 2085 final int numActivities = activities.size(); 2086 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2087 final ActivityRecord r = activities.get(activityNdx); 2088 group.tokens.add(r.appToken); 2089 } 2090 } 2091 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2092 } 2093 2094 /** 2095 * Perform a reset of the given task, if needed as part of launching it. 2096 * Returns the new HistoryRecord at the top of the task. 2097 */ 2098 /** 2099 * Helper method for #resetTaskIfNeededLocked. 2100 * We are inside of the task being reset... we'll either finish this activity, push it out 2101 * for another task, or leave it as-is. 2102 * @param task The task containing the Activity (taskTop) that might be reset. 2103 * @param forceReset 2104 * @return An ActivityOptions that needs to be processed. 2105 */ 2106 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2107 ActivityOptions topOptions = null; 2108 2109 int replyChainEnd = -1; 2110 boolean canMoveOptions = true; 2111 2112 // We only do this for activities that are not the root of the task (since if we finish 2113 // the root, we may no longer have the task!). 2114 final ArrayList<ActivityRecord> activities = task.mActivities; 2115 final int numActivities = activities.size(); 2116 final int rootActivityNdx = task.findEffectiveRootIndex(); 2117 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2118 ActivityRecord target = activities.get(i); 2119 if (target.frontOfTask) 2120 break; 2121 2122 final int flags = target.info.flags; 2123 final boolean finishOnTaskLaunch = 2124 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2125 final boolean allowTaskReparenting = 2126 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2127 final boolean clearWhenTaskReset = 2128 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2129 2130 if (!finishOnTaskLaunch 2131 && !clearWhenTaskReset 2132 && target.resultTo != null) { 2133 // If this activity is sending a reply to a previous 2134 // activity, we can't do anything with it now until 2135 // we reach the start of the reply chain. 2136 // XXX note that we are assuming the result is always 2137 // to the previous activity, which is almost always 2138 // the case but we really shouldn't count on. 2139 if (replyChainEnd < 0) { 2140 replyChainEnd = i; 2141 } 2142 } else if (!finishOnTaskLaunch 2143 && !clearWhenTaskReset 2144 && allowTaskReparenting 2145 && target.taskAffinity != null 2146 && !target.taskAffinity.equals(task.affinity)) { 2147 // If this activity has an affinity for another 2148 // task, then we need to move it out of here. We will 2149 // move it as far out of the way as possible, to the 2150 // bottom of the activity stack. This also keeps it 2151 // correctly ordered with any activities we previously 2152 // moved. 2153 final TaskRecord targetTask; 2154 final ActivityRecord bottom = 2155 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2156 mTaskHistory.get(0).mActivities.get(0) : null; 2157 if (bottom != null && target.taskAffinity != null 2158 && target.taskAffinity.equals(bottom.task.affinity)) { 2159 // If the activity currently at the bottom has the 2160 // same task affinity as the one we are moving, 2161 // then merge it into the same task. 2162 targetTask = bottom.task; 2163 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2164 + " out to bottom task " + bottom.task); 2165 } else { 2166 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2167 null, null, null, false); 2168 targetTask.affinityIntent = target.intent; 2169 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2170 + " out to new task " + target.task); 2171 } 2172 2173 final int targetTaskId = targetTask.taskId; 2174 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2175 2176 boolean noOptions = canMoveOptions; 2177 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2178 for (int srcPos = start; srcPos >= i; --srcPos) { 2179 final ActivityRecord p = activities.get(srcPos); 2180 if (p.finishing) { 2181 continue; 2182 } 2183 2184 canMoveOptions = false; 2185 if (noOptions && topOptions == null) { 2186 topOptions = p.takeOptionsLocked(); 2187 if (topOptions != null) { 2188 noOptions = false; 2189 } 2190 } 2191 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2192 + task + " adding to task=" + targetTask 2193 + " Callers=" + Debug.getCallers(4)); 2194 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2195 + " out to target's task " + target.task); 2196 p.setTask(targetTask, null); 2197 targetTask.addActivityAtBottom(p); 2198 2199 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2200 } 2201 2202 mWindowManager.moveTaskToBottom(targetTaskId); 2203 if (VALIDATE_TOKENS) { 2204 validateAppTokensLocked(); 2205 } 2206 2207 replyChainEnd = -1; 2208 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2209 // If the activity should just be removed -- either 2210 // because it asks for it, or the task should be 2211 // cleared -- then finish it and anything that is 2212 // part of its reply chain. 2213 int end; 2214 if (clearWhenTaskReset) { 2215 // In this case, we want to finish this activity 2216 // and everything above it, so be sneaky and pretend 2217 // like these are all in the reply chain. 2218 end = numActivities - 1; 2219 } else if (replyChainEnd < 0) { 2220 end = i; 2221 } else { 2222 end = replyChainEnd; 2223 } 2224 boolean noOptions = canMoveOptions; 2225 for (int srcPos = i; srcPos <= end; srcPos++) { 2226 ActivityRecord p = activities.get(srcPos); 2227 if (p.finishing) { 2228 continue; 2229 } 2230 canMoveOptions = false; 2231 if (noOptions && topOptions == null) { 2232 topOptions = p.takeOptionsLocked(); 2233 if (topOptions != null) { 2234 noOptions = false; 2235 } 2236 } 2237 if (DEBUG_TASKS) Slog.w(TAG, 2238 "resetTaskIntendedTask: calling finishActivity on " + p); 2239 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2240 end--; 2241 srcPos--; 2242 } 2243 } 2244 replyChainEnd = -1; 2245 } else { 2246 // If we were in the middle of a chain, well the 2247 // activity that started it all doesn't want anything 2248 // special, so leave it all as-is. 2249 replyChainEnd = -1; 2250 } 2251 } 2252 2253 return topOptions; 2254 } 2255 2256 /** 2257 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2258 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2259 * @param affinityTask The task we are looking for an affinity to. 2260 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2261 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2262 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2263 */ 2264 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2265 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2266 int replyChainEnd = -1; 2267 final int taskId = task.taskId; 2268 final String taskAffinity = task.affinity; 2269 2270 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2271 final int numActivities = activities.size(); 2272 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2273 2274 // Do not operate on or below the effective root Activity. 2275 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2276 ActivityRecord target = activities.get(i); 2277 if (target.frontOfTask) 2278 break; 2279 2280 final int flags = target.info.flags; 2281 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2282 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2283 2284 if (target.resultTo != null) { 2285 // If this activity is sending a reply to a previous 2286 // activity, we can't do anything with it now until 2287 // we reach the start of the reply chain. 2288 // XXX note that we are assuming the result is always 2289 // to the previous activity, which is almost always 2290 // the case but we really shouldn't count on. 2291 if (replyChainEnd < 0) { 2292 replyChainEnd = i; 2293 } 2294 } else if (topTaskIsHigher 2295 && allowTaskReparenting 2296 && taskAffinity != null 2297 && taskAffinity.equals(target.taskAffinity)) { 2298 // This activity has an affinity for our task. Either remove it if we are 2299 // clearing or move it over to our task. Note that 2300 // we currently punt on the case where we are resetting a 2301 // task that is not at the top but who has activities above 2302 // with an affinity to it... this is really not a normal 2303 // case, and we will need to later pull that task to the front 2304 // and usually at that point we will do the reset and pick 2305 // up those remaining activities. (This only happens if 2306 // someone starts an activity in a new task from an activity 2307 // in a task that is not currently on top.) 2308 if (forceReset || finishOnTaskLaunch) { 2309 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2310 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2311 for (int srcPos = start; srcPos >= i; --srcPos) { 2312 final ActivityRecord p = activities.get(srcPos); 2313 if (p.finishing) { 2314 continue; 2315 } 2316 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2317 } 2318 } else { 2319 if (taskInsertionPoint < 0) { 2320 taskInsertionPoint = task.mActivities.size(); 2321 2322 } 2323 2324 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2325 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2326 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2327 for (int srcPos = start; srcPos >= i; --srcPos) { 2328 final ActivityRecord p = activities.get(srcPos); 2329 p.setTask(task, null); 2330 task.addActivityAtIndex(taskInsertionPoint, p); 2331 2332 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2333 + " to stack at " + task, 2334 new RuntimeException("here").fillInStackTrace()); 2335 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2336 + " in to resetting task " + task); 2337 mWindowManager.setAppGroupId(p.appToken, taskId); 2338 } 2339 mWindowManager.moveTaskToTop(taskId); 2340 if (VALIDATE_TOKENS) { 2341 validateAppTokensLocked(); 2342 } 2343 2344 // Now we've moved it in to place... but what if this is 2345 // a singleTop activity and we have put it on top of another 2346 // instance of the same activity? Then we drop the instance 2347 // below so it remains singleTop. 2348 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2349 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2350 int targetNdx = taskActivities.indexOf(target); 2351 if (targetNdx > 0) { 2352 ActivityRecord p = taskActivities.get(targetNdx - 1); 2353 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2354 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2355 false); 2356 } 2357 } 2358 } 2359 } 2360 2361 replyChainEnd = -1; 2362 } 2363 } 2364 return taskInsertionPoint; 2365 } 2366 2367 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2368 ActivityRecord newActivity) { 2369 boolean forceReset = 2370 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2371 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2372 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2373 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2374 forceReset = true; 2375 } 2376 } 2377 2378 final TaskRecord task = taskTop.task; 2379 2380 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2381 * for remaining tasks. Used for later tasks to reparent to task. */ 2382 boolean taskFound = false; 2383 2384 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2385 ActivityOptions topOptions = null; 2386 2387 // Preserve the location for reparenting in the new task. 2388 int reparentInsertionPoint = -1; 2389 2390 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2391 final TaskRecord targetTask = mTaskHistory.get(i); 2392 2393 if (targetTask == task) { 2394 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2395 taskFound = true; 2396 } else { 2397 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2398 taskFound, forceReset, reparentInsertionPoint); 2399 } 2400 } 2401 2402 int taskNdx = mTaskHistory.indexOf(task); 2403 do { 2404 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2405 } while (taskTop == null && taskNdx >= 0); 2406 2407 if (topOptions != null) { 2408 // If we got some ActivityOptions from an activity on top that 2409 // was removed from the task, propagate them to the new real top. 2410 if (taskTop != null) { 2411 taskTop.updateOptionsLocked(topOptions); 2412 } else { 2413 topOptions.abort(); 2414 } 2415 } 2416 2417 return taskTop; 2418 } 2419 2420 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2421 String resultWho, int requestCode, int resultCode, Intent data) { 2422 2423 if (callingUid > 0) { 2424 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2425 data, r.getUriPermissionsLocked(), r.userId); 2426 } 2427 2428 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2429 + " : who=" + resultWho + " req=" + requestCode 2430 + " res=" + resultCode + " data=" + data); 2431 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2432 try { 2433 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2434 list.add(new ResultInfo(resultWho, requestCode, 2435 resultCode, data)); 2436 r.app.thread.scheduleSendResult(r.appToken, list); 2437 return; 2438 } catch (Exception e) { 2439 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2440 } 2441 } 2442 2443 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2444 } 2445 2446 private void adjustFocusedActivityLocked(ActivityRecord r) { 2447 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2448 ActivityRecord next = topRunningActivityLocked(null); 2449 if (next != r) { 2450 final TaskRecord task = r.task; 2451 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2452 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2453 } 2454 } 2455 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2456 if (top != null) { 2457 mService.setFocusedActivityLocked(top); 2458 } 2459 } 2460 } 2461 2462 final void stopActivityLocked(ActivityRecord r) { 2463 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2464 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2465 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2466 if (!r.finishing) { 2467 if (!mService.isSleeping()) { 2468 if (DEBUG_STATES) { 2469 Slog.d(TAG, "no-history finish of " + r); 2470 } 2471 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2472 "no-history", false); 2473 } else { 2474 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2475 + " on stop because we're just sleeping"); 2476 } 2477 } 2478 } 2479 2480 if (r.app != null && r.app.thread != null) { 2481 adjustFocusedActivityLocked(r); 2482 r.resumeKeyDispatchingLocked(); 2483 try { 2484 r.stopped = false; 2485 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2486 + " (stop requested)"); 2487 r.state = ActivityState.STOPPING; 2488 if (DEBUG_VISBILITY) Slog.v( 2489 TAG, "Stopping visible=" + r.visible + " for " + r); 2490 if (!r.visible) { 2491 mWindowManager.setAppVisibility(r.appToken, false); 2492 } 2493 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2494 if (mService.isSleepingOrShuttingDown()) { 2495 r.setSleeping(true); 2496 } 2497 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2498 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2499 } catch (Exception e) { 2500 // Maybe just ignore exceptions here... if the process 2501 // has crashed, our death notification will clean things 2502 // up. 2503 Slog.w(TAG, "Exception thrown during pause", e); 2504 // Just in case, assume it to be stopped. 2505 r.stopped = true; 2506 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2507 r.state = ActivityState.STOPPED; 2508 if (r.configDestroy) { 2509 destroyActivityLocked(r, true, "stop-except"); 2510 } 2511 } 2512 } 2513 } 2514 2515 /** 2516 * @return Returns true if the activity is being finished, false if for 2517 * some reason it is being left as-is. 2518 */ 2519 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2520 Intent resultData, String reason, boolean oomAdj) { 2521 ActivityRecord r = isInStackLocked(token); 2522 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2523 TAG, "Finishing activity token=" + token + " r=" 2524 + ", result=" + resultCode + ", data=" + resultData 2525 + ", reason=" + reason); 2526 if (r == null) { 2527 return false; 2528 } 2529 2530 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2531 return true; 2532 } 2533 2534 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2535 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2536 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2537 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2538 ActivityRecord r = activities.get(activityNdx); 2539 if (r.resultTo == self && r.requestCode == requestCode) { 2540 if ((r.resultWho == null && resultWho == null) || 2541 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2542 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2543 false); 2544 } 2545 } 2546 } 2547 } 2548 mService.updateOomAdjLocked(); 2549 } 2550 2551 final void finishTopRunningActivityLocked(ProcessRecord app) { 2552 ActivityRecord r = topRunningActivityLocked(null); 2553 if (r != null && r.app == app) { 2554 // If the top running activity is from this crashing 2555 // process, then terminate it to avoid getting in a loop. 2556 Slog.w(TAG, " Force finishing activity " 2557 + r.intent.getComponent().flattenToShortString()); 2558 int taskNdx = mTaskHistory.indexOf(r.task); 2559 int activityNdx = r.task.mActivities.indexOf(r); 2560 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2561 // Also terminate any activities below it that aren't yet 2562 // stopped, to avoid a situation where one will get 2563 // re-start our crashing activity once it gets resumed again. 2564 --activityNdx; 2565 if (activityNdx < 0) { 2566 do { 2567 --taskNdx; 2568 if (taskNdx < 0) { 2569 break; 2570 } 2571 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2572 } while (activityNdx < 0); 2573 } 2574 if (activityNdx >= 0) { 2575 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2576 if (r.state == ActivityState.RESUMED 2577 || r.state == ActivityState.PAUSING 2578 || r.state == ActivityState.PAUSED) { 2579 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2580 Slog.w(TAG, " Force finishing activity " 2581 + r.intent.getComponent().flattenToShortString()); 2582 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2583 } 2584 } 2585 } 2586 } 2587 } 2588 2589 final void finishVoiceTask(IVoiceInteractionSession session) { 2590 IBinder sessionBinder = session.asBinder(); 2591 boolean didOne = false; 2592 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2593 TaskRecord tr = mTaskHistory.get(taskNdx); 2594 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2595 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2596 ActivityRecord r = tr.mActivities.get(activityNdx); 2597 if (!r.finishing) { 2598 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2599 false); 2600 didOne = true; 2601 } 2602 } 2603 } 2604 } 2605 if (didOne) { 2606 mService.updateOomAdjLocked(); 2607 } 2608 } 2609 2610 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2611 ArrayList<ActivityRecord> activities = r.task.mActivities; 2612 for (int index = activities.indexOf(r); index >= 0; --index) { 2613 ActivityRecord cur = activities.get(index); 2614 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2615 break; 2616 } 2617 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2618 } 2619 return true; 2620 } 2621 2622 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2623 // send the result 2624 ActivityRecord resultTo = r.resultTo; 2625 if (resultTo != null) { 2626 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2627 + " who=" + r.resultWho + " req=" + r.requestCode 2628 + " res=" + resultCode + " data=" + resultData); 2629 if (resultTo.userId != r.userId) { 2630 if (resultData != null) { 2631 resultData.setContentUserHint(r.userId); 2632 } 2633 } 2634 if (r.info.applicationInfo.uid > 0) { 2635 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2636 resultTo.packageName, resultData, 2637 resultTo.getUriPermissionsLocked(), resultTo.userId); 2638 } 2639 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2640 resultData); 2641 r.resultTo = null; 2642 } 2643 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2644 2645 // Make sure this HistoryRecord is not holding on to other resources, 2646 // because clients have remote IPC references to this object so we 2647 // can't assume that will go away and want to avoid circular IPC refs. 2648 r.results = null; 2649 r.pendingResults = null; 2650 r.newIntents = null; 2651 r.icicle = null; 2652 } 2653 2654 /** 2655 * @return Returns true if this activity has been removed from the history 2656 * list, or false if it is still in the list and will be removed later. 2657 */ 2658 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2659 String reason, boolean oomAdj) { 2660 if (r.finishing) { 2661 Slog.w(TAG, "Duplicate finish request for " + r); 2662 return false; 2663 } 2664 2665 r.makeFinishing(); 2666 final TaskRecord task = r.task; 2667 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2668 r.userId, System.identityHashCode(r), 2669 task.taskId, r.shortComponentName, reason); 2670 final ArrayList<ActivityRecord> activities = task.mActivities; 2671 final int index = activities.indexOf(r); 2672 if (index < (activities.size() - 1)) { 2673 task.setFrontOfTask(); 2674 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2675 // If the caller asked that this activity (and all above it) 2676 // be cleared when the task is reset, don't lose that information, 2677 // but propagate it up to the next activity. 2678 ActivityRecord next = activities.get(index+1); 2679 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2680 } 2681 } 2682 2683 r.pauseKeyDispatchingLocked(); 2684 2685 adjustFocusedActivityLocked(r); 2686 2687 finishActivityResultsLocked(r, resultCode, resultData); 2688 2689 if (mResumedActivity == r) { 2690 boolean endTask = index <= 0; 2691 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2692 "Prepare close transition: finishing " + r); 2693 mWindowManager.prepareAppTransition(endTask 2694 ? AppTransition.TRANSIT_TASK_CLOSE 2695 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2696 2697 // Tell window manager to prepare for this one to be removed. 2698 mWindowManager.setAppVisibility(r.appToken, false); 2699 2700 if (mPausingActivity == null) { 2701 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2702 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2703 startPausingLocked(false, false); 2704 } 2705 2706 if (endTask) { 2707 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2708 } 2709 } else if (r.state != ActivityState.PAUSING) { 2710 // If the activity is PAUSING, we will complete the finish once 2711 // it is done pausing; else we can just directly finish it here. 2712 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2713 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2714 } else { 2715 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2716 } 2717 2718 return false; 2719 } 2720 2721 static final int FINISH_IMMEDIATELY = 0; 2722 static final int FINISH_AFTER_PAUSE = 1; 2723 static final int FINISH_AFTER_VISIBLE = 2; 2724 2725 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2726 // First things first: if this activity is currently visible, 2727 // and the resumed activity is not yet visible, then hold off on 2728 // finishing until the resumed one becomes visible. 2729 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2730 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2731 mStackSupervisor.mStoppingActivities.add(r); 2732 if (mStackSupervisor.mStoppingActivities.size() > 3 2733 || r.frontOfTask && mTaskHistory.size() <= 1) { 2734 // If we already have a few activities waiting to stop, 2735 // then give up on things going idle and start clearing 2736 // them out. Or if r is the last of activity of the last task the stack 2737 // will be empty and must be cleared immediately. 2738 mStackSupervisor.scheduleIdleLocked(); 2739 } else { 2740 mStackSupervisor.checkReadyForSleepLocked(); 2741 } 2742 } 2743 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2744 + " (finish requested)"); 2745 r.state = ActivityState.STOPPING; 2746 if (oomAdj) { 2747 mService.updateOomAdjLocked(); 2748 } 2749 return r; 2750 } 2751 2752 // make sure the record is cleaned out of other places. 2753 mStackSupervisor.mStoppingActivities.remove(r); 2754 mStackSupervisor.mGoingToSleepActivities.remove(r); 2755 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2756 if (mResumedActivity == r) { 2757 mResumedActivity = null; 2758 } 2759 final ActivityState prevState = r.state; 2760 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2761 r.state = ActivityState.FINISHING; 2762 2763 if (mode == FINISH_IMMEDIATELY 2764 || prevState == ActivityState.STOPPED 2765 || prevState == ActivityState.INITIALIZING) { 2766 // If this activity is already stopped, we can just finish 2767 // it right now. 2768 r.makeFinishing(); 2769 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2770 if (activityRemoved) { 2771 mStackSupervisor.resumeTopActivitiesLocked(); 2772 } 2773 if (DEBUG_CONTAINERS) Slog.d(TAG, 2774 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2775 " destroy returned removed=" + activityRemoved); 2776 return activityRemoved ? null : r; 2777 } 2778 2779 // Need to go through the full pause cycle to get this 2780 // activity into the stopped state and then finish it. 2781 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2782 mStackSupervisor.mFinishingActivities.add(r); 2783 r.resumeKeyDispatchingLocked(); 2784 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2785 return r; 2786 } 2787 2788 void finishAllActivitiesLocked(boolean immediately) { 2789 boolean noActivitiesInStack = true; 2790 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2791 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2792 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2793 final ActivityRecord r = activities.get(activityNdx); 2794 noActivitiesInStack = false; 2795 if (r.finishing && !immediately) { 2796 continue; 2797 } 2798 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2799 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2800 } 2801 } 2802 if (noActivitiesInStack) { 2803 mActivityContainer.onTaskListEmptyLocked(); 2804 } 2805 } 2806 2807 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2808 // Basic case: for simple app-centric recents, we need to recreate 2809 // the task if the affinity has changed. 2810 if (srec == null || srec.task.affinity == null || 2811 !srec.task.affinity.equals(destAffinity)) { 2812 return true; 2813 } 2814 // Document-centric case: an app may be split in to multiple documents; 2815 // they need to re-create their task if this current activity is the root 2816 // of a document, unless simply finishing it will return them to the the 2817 // correct app behind. 2818 if (srec.frontOfTask && srec.task != null) { 2819 // Okay, this activity is at the root of its task. What to do, what to do... 2820 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2821 // Finishing won't return to an application, so we need to recreate. 2822 return true; 2823 } 2824 // We now need to get the task below it to determine what to do. 2825 int taskIdx = mTaskHistory.indexOf(srec.task); 2826 if (taskIdx <= 0) { 2827 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2828 return false; 2829 } 2830 if (taskIdx == 0) { 2831 // At the bottom of the stack, nothing to go back to. 2832 return true; 2833 } 2834 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2835 if (!srec.task.affinity.equals(prevTask.affinity)) { 2836 // These are different apps, so need to recreate. 2837 return true; 2838 } 2839 } 2840 return false; 2841 } 2842 2843 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2844 Intent resultData) { 2845 final ActivityRecord srec = ActivityRecord.forToken(token); 2846 final TaskRecord task = srec.task; 2847 final ArrayList<ActivityRecord> activities = task.mActivities; 2848 final int start = activities.indexOf(srec); 2849 if (!mTaskHistory.contains(task) || (start < 0)) { 2850 return false; 2851 } 2852 int finishTo = start - 1; 2853 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2854 boolean foundParentInTask = false; 2855 final ComponentName dest = destIntent.getComponent(); 2856 if (start > 0 && dest != null) { 2857 for (int i = finishTo; i >= 0; i--) { 2858 ActivityRecord r = activities.get(i); 2859 if (r.info.packageName.equals(dest.getPackageName()) && 2860 r.info.name.equals(dest.getClassName())) { 2861 finishTo = i; 2862 parent = r; 2863 foundParentInTask = true; 2864 break; 2865 } 2866 } 2867 } 2868 2869 IActivityController controller = mService.mController; 2870 if (controller != null) { 2871 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2872 if (next != null) { 2873 // ask watcher if this is allowed 2874 boolean resumeOK = true; 2875 try { 2876 resumeOK = controller.activityResuming(next.packageName); 2877 } catch (RemoteException e) { 2878 mService.mController = null; 2879 Watchdog.getInstance().setActivityController(null); 2880 } 2881 2882 if (!resumeOK) { 2883 return false; 2884 } 2885 } 2886 } 2887 final long origId = Binder.clearCallingIdentity(); 2888 for (int i = start; i > finishTo; i--) { 2889 ActivityRecord r = activities.get(i); 2890 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2891 // Only return the supplied result for the first activity finished 2892 resultCode = Activity.RESULT_CANCELED; 2893 resultData = null; 2894 } 2895 2896 if (parent != null && foundParentInTask) { 2897 final int parentLaunchMode = parent.info.launchMode; 2898 final int destIntentFlags = destIntent.getFlags(); 2899 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2900 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2901 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2902 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2903 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2904 } else { 2905 try { 2906 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2907 destIntent.getComponent(), 0, srec.userId); 2908 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2909 null, aInfo, null, null, parent.appToken, null, 2910 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2911 0, null, true, null, null, null); 2912 foundParentInTask = res == ActivityManager.START_SUCCESS; 2913 } catch (RemoteException e) { 2914 foundParentInTask = false; 2915 } 2916 requestFinishActivityLocked(parent.appToken, resultCode, 2917 resultData, "navigate-up", true); 2918 } 2919 } 2920 Binder.restoreCallingIdentity(origId); 2921 return foundParentInTask; 2922 } 2923 /** 2924 * Perform the common clean-up of an activity record. This is called both 2925 * as part of destroyActivityLocked() (when destroying the client-side 2926 * representation) and cleaning things up as a result of its hosting 2927 * processing going away, in which case there is no remaining client-side 2928 * state to destroy so only the cleanup here is needed. 2929 */ 2930 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2931 boolean setState) { 2932 if (mResumedActivity == r) { 2933 mResumedActivity = null; 2934 } 2935 if (mPausingActivity == r) { 2936 mPausingActivity = null; 2937 } 2938 mService.clearFocusedActivity(r); 2939 2940 r.configDestroy = false; 2941 r.frozenBeforeDestroy = false; 2942 2943 if (setState) { 2944 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2945 r.state = ActivityState.DESTROYED; 2946 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2947 r.app = null; 2948 } 2949 2950 // Make sure this record is no longer in the pending finishes list. 2951 // This could happen, for example, if we are trimming activities 2952 // down to the max limit while they are still waiting to finish. 2953 mStackSupervisor.mFinishingActivities.remove(r); 2954 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2955 2956 // Remove any pending results. 2957 if (r.finishing && r.pendingResults != null) { 2958 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2959 PendingIntentRecord rec = apr.get(); 2960 if (rec != null) { 2961 mService.cancelIntentSenderLocked(rec, false); 2962 } 2963 } 2964 r.pendingResults = null; 2965 } 2966 2967 if (cleanServices) { 2968 cleanUpActivityServicesLocked(r); 2969 } 2970 2971 // Get rid of any pending idle timeouts. 2972 removeTimeoutsForActivityLocked(r); 2973 if (getVisibleBehindActivity() == r) { 2974 mStackSupervisor.requestVisibleBehindLocked(r, false); 2975 } 2976 } 2977 2978 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2979 mStackSupervisor.removeTimeoutsForActivityLocked(r); 2980 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 2981 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 2982 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2983 r.finishLaunchTickingLocked(); 2984 } 2985 2986 private void removeActivityFromHistoryLocked(ActivityRecord r) { 2987 mStackSupervisor.removeChildActivityContainers(r); 2988 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 2989 r.makeFinishing(); 2990 if (DEBUG_ADD_REMOVE) { 2991 RuntimeException here = new RuntimeException("here"); 2992 here.fillInStackTrace(); 2993 Slog.i(TAG, "Removing activity " + r + " from stack"); 2994 } 2995 r.takeFromHistory(); 2996 removeTimeoutsForActivityLocked(r); 2997 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 2998 r.state = ActivityState.DESTROYED; 2999 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3000 r.app = null; 3001 mWindowManager.removeAppToken(r.appToken); 3002 if (VALIDATE_TOKENS) { 3003 validateAppTokensLocked(); 3004 } 3005 final TaskRecord task = r.task; 3006 if (task != null && task.removeActivity(r)) { 3007 if (DEBUG_STACK) Slog.i(TAG, 3008 "removeActivityFromHistoryLocked: last activity removed from " + this); 3009 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3010 task.isOverHomeStack()) { 3011 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3012 } 3013 removeTask(task); 3014 } 3015 cleanUpActivityServicesLocked(r); 3016 r.removeUriPermissionsLocked(); 3017 } 3018 3019 /** 3020 * Perform clean-up of service connections in an activity record. 3021 */ 3022 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3023 // Throw away any services that have been bound by this activity. 3024 if (r.connections != null) { 3025 Iterator<ConnectionRecord> it = r.connections.iterator(); 3026 while (it.hasNext()) { 3027 ConnectionRecord c = it.next(); 3028 mService.mServices.removeConnectionLocked(c, null, r); 3029 } 3030 r.connections = null; 3031 } 3032 } 3033 3034 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3035 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3036 msg.obj = new ScheduleDestroyArgs(owner, reason); 3037 mHandler.sendMessage(msg); 3038 } 3039 3040 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3041 boolean lastIsOpaque = false; 3042 boolean activityRemoved = false; 3043 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3044 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3045 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3046 final ActivityRecord r = activities.get(activityNdx); 3047 if (r.finishing) { 3048 continue; 3049 } 3050 if (r.fullscreen) { 3051 lastIsOpaque = true; 3052 } 3053 if (owner != null && r.app != owner) { 3054 continue; 3055 } 3056 if (!lastIsOpaque) { 3057 continue; 3058 } 3059 if (r.isDestroyable()) { 3060 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3061 + " resumed=" + mResumedActivity 3062 + " pausing=" + mPausingActivity + " for reason " + reason); 3063 if (destroyActivityLocked(r, true, reason)) { 3064 activityRemoved = true; 3065 } 3066 } 3067 } 3068 } 3069 if (activityRemoved) { 3070 mStackSupervisor.resumeTopActivitiesLocked(); 3071 } 3072 } 3073 3074 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3075 if (r.isDestroyable()) { 3076 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3077 + " resumed=" + mResumedActivity 3078 + " pausing=" + mPausingActivity + " for reason " + reason); 3079 return destroyActivityLocked(r, true, reason); 3080 } 3081 return false; 3082 } 3083 3084 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3085 String reason) { 3086 // Iterate over tasks starting at the back (oldest) first. 3087 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3088 int maxTasks = tasks.size() / 4; 3089 if (maxTasks < 1) { 3090 maxTasks = 1; 3091 } 3092 int numReleased = 0; 3093 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3094 final TaskRecord task = mTaskHistory.get(taskNdx); 3095 if (!tasks.contains(task)) { 3096 continue; 3097 } 3098 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3099 int curNum = 0; 3100 final ArrayList<ActivityRecord> activities = task.mActivities; 3101 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3102 final ActivityRecord activity = activities.get(actNdx); 3103 if (activity.app == app && activity.isDestroyable()) { 3104 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3105 + " in state " + activity.state + " resumed=" + mResumedActivity 3106 + " pausing=" + mPausingActivity + " for reason " + reason); 3107 destroyActivityLocked(activity, true, reason); 3108 if (activities.get(actNdx) != activity) { 3109 // Was removed from list, back up so we don't miss the next one. 3110 actNdx--; 3111 } 3112 curNum++; 3113 } 3114 } 3115 if (curNum > 0) { 3116 numReleased += curNum; 3117 maxTasks--; 3118 if (mTaskHistory.get(taskNdx) != task) { 3119 // The entire task got removed, back up so we don't miss the next one. 3120 taskNdx--; 3121 } 3122 } 3123 } 3124 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3125 return numReleased; 3126 } 3127 3128 /** 3129 * Destroy the current CLIENT SIDE instance of an activity. This may be 3130 * called both when actually finishing an activity, or when performing 3131 * a configuration switch where we destroy the current client-side object 3132 * but then create a new client-side object for this same HistoryRecord. 3133 */ 3134 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3135 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3136 TAG, "Removing activity from " + reason + ": token=" + r 3137 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3138 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3139 r.userId, System.identityHashCode(r), 3140 r.task.taskId, r.shortComponentName, reason); 3141 3142 boolean removedFromHistory = false; 3143 3144 cleanUpActivityLocked(r, false, false); 3145 3146 final boolean hadApp = r.app != null; 3147 3148 if (hadApp) { 3149 if (removeFromApp) { 3150 r.app.activities.remove(r); 3151 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3152 mService.mHeavyWeightProcess = null; 3153 mService.mHandler.sendEmptyMessage( 3154 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3155 } 3156 if (r.app.activities.isEmpty()) { 3157 // No longer have activities, so update LRU list and oom adj. 3158 mService.updateLruProcessLocked(r.app, false, null); 3159 mService.updateOomAdjLocked(); 3160 } 3161 } 3162 3163 boolean skipDestroy = false; 3164 3165 try { 3166 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3167 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3168 r.configChangeFlags); 3169 } catch (Exception e) { 3170 // We can just ignore exceptions here... if the process 3171 // has crashed, our death notification will clean things 3172 // up. 3173 //Slog.w(TAG, "Exception thrown during finish", e); 3174 if (r.finishing) { 3175 removeActivityFromHistoryLocked(r); 3176 removedFromHistory = true; 3177 skipDestroy = true; 3178 } 3179 } 3180 3181 r.nowVisible = false; 3182 3183 // If the activity is finishing, we need to wait on removing it 3184 // from the list to give it a chance to do its cleanup. During 3185 // that time it may make calls back with its token so we need to 3186 // be able to find it on the list and so we don't want to remove 3187 // it from the list yet. Otherwise, we can just immediately put 3188 // it in the destroyed state since we are not removing it from the 3189 // list. 3190 if (r.finishing && !skipDestroy) { 3191 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3192 + " (destroy requested)"); 3193 r.state = ActivityState.DESTROYING; 3194 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3195 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3196 } else { 3197 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3198 r.state = ActivityState.DESTROYED; 3199 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3200 r.app = null; 3201 } 3202 } else { 3203 // remove this record from the history. 3204 if (r.finishing) { 3205 removeActivityFromHistoryLocked(r); 3206 removedFromHistory = true; 3207 } else { 3208 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3209 r.state = ActivityState.DESTROYED; 3210 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3211 r.app = null; 3212 } 3213 } 3214 3215 r.configChangeFlags = 0; 3216 3217 if (!mLRUActivities.remove(r) && hadApp) { 3218 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3219 } 3220 3221 return removedFromHistory; 3222 } 3223 3224 final void activityDestroyedLocked(IBinder token) { 3225 final long origId = Binder.clearCallingIdentity(); 3226 try { 3227 ActivityRecord r = ActivityRecord.forToken(token); 3228 if (r != null) { 3229 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3230 } 3231 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3232 3233 if (isInStackLocked(token) != null) { 3234 if (r.state == ActivityState.DESTROYING) { 3235 cleanUpActivityLocked(r, true, false); 3236 removeActivityFromHistoryLocked(r); 3237 } 3238 } 3239 mStackSupervisor.resumeTopActivitiesLocked(); 3240 } finally { 3241 Binder.restoreCallingIdentity(origId); 3242 } 3243 } 3244 3245 void releaseBackgroundResources() { 3246 if (hasVisibleBehindActivity() && 3247 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3248 final ActivityRecord r = getVisibleBehindActivity(); 3249 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3250 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3251 " thread=" + r.app.thread); 3252 if (r != null && r.app != null && r.app.thread != null) { 3253 try { 3254 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3255 } catch (RemoteException e) { 3256 } 3257 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3258 } else { 3259 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3260 backgroundResourcesReleased(r.appToken); 3261 } 3262 } 3263 } 3264 3265 final void backgroundResourcesReleased(IBinder token) { 3266 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3267 final ActivityRecord r = getVisibleBehindActivity(); 3268 if (r != null) { 3269 mStackSupervisor.mStoppingActivities.add(r); 3270 setVisibleBehindActivity(null); 3271 } 3272 mStackSupervisor.resumeTopActivitiesLocked(); 3273 } 3274 3275 boolean hasVisibleBehindActivity() { 3276 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3277 } 3278 3279 void setVisibleBehindActivity(ActivityRecord r) { 3280 if (isAttached()) { 3281 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3282 } 3283 } 3284 3285 ActivityRecord getVisibleBehindActivity() { 3286 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3287 } 3288 3289 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3290 ProcessRecord app, String listName) { 3291 int i = list.size(); 3292 if (DEBUG_CLEANUP) Slog.v( 3293 TAG, "Removing app " + app + " from list " + listName 3294 + " with " + i + " entries"); 3295 while (i > 0) { 3296 i--; 3297 ActivityRecord r = list.get(i); 3298 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3299 if (r.app == app) { 3300 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3301 list.remove(i); 3302 removeTimeoutsForActivityLocked(r); 3303 } 3304 } 3305 } 3306 3307 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3308 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3309 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3310 "mStoppingActivities"); 3311 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3312 "mGoingToSleepActivities"); 3313 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3314 "mWaitingVisibleActivities"); 3315 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3316 "mFinishingActivities"); 3317 3318 boolean hasVisibleActivities = false; 3319 3320 // Clean out the history list. 3321 int i = numActivities(); 3322 if (DEBUG_CLEANUP) Slog.v( 3323 TAG, "Removing app " + app + " from history with " + i + " entries"); 3324 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3325 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3326 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3327 final ActivityRecord r = activities.get(activityNdx); 3328 --i; 3329 if (DEBUG_CLEANUP) Slog.v( 3330 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3331 if (r.app == app) { 3332 boolean remove; 3333 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3334 // Don't currently have state for the activity, or 3335 // it is finishing -- always remove it. 3336 remove = true; 3337 } else if (r.launchCount > 2 && 3338 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3339 // We have launched this activity too many times since it was 3340 // able to run, so give up and remove it. 3341 remove = true; 3342 } else { 3343 // The process may be gone, but the activity lives on! 3344 remove = false; 3345 } 3346 if (remove) { 3347 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3348 RuntimeException here = new RuntimeException("here"); 3349 here.fillInStackTrace(); 3350 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3351 + ": haveState=" + r.haveState 3352 + " stateNotNeeded=" + r.stateNotNeeded 3353 + " finishing=" + r.finishing 3354 + " state=" + r.state, here); 3355 } 3356 if (!r.finishing) { 3357 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3358 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3359 r.userId, System.identityHashCode(r), 3360 r.task.taskId, r.shortComponentName, 3361 "proc died without state saved"); 3362 if (r.state == ActivityState.RESUMED) { 3363 mService.updateUsageStats(r, false); 3364 } 3365 } 3366 removeActivityFromHistoryLocked(r); 3367 3368 } else { 3369 // We have the current state for this activity, so 3370 // it can be restarted later when needed. 3371 if (localLOGV) Slog.v( 3372 TAG, "Keeping entry, setting app to null"); 3373 if (r.visible) { 3374 hasVisibleActivities = true; 3375 } 3376 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3377 + r); 3378 r.app = null; 3379 r.nowVisible = false; 3380 if (!r.haveState) { 3381 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3382 "App died, clearing saved state of " + r); 3383 r.icicle = null; 3384 } 3385 } 3386 3387 cleanUpActivityLocked(r, true, true); 3388 } 3389 } 3390 } 3391 3392 return hasVisibleActivities; 3393 } 3394 3395 final void updateTransitLocked(int transit, Bundle options) { 3396 if (options != null) { 3397 ActivityRecord r = topRunningActivityLocked(null); 3398 if (r != null && r.state != ActivityState.RESUMED) { 3399 r.updateOptionsLocked(options); 3400 } else { 3401 ActivityOptions.abort(options); 3402 } 3403 } 3404 mWindowManager.prepareAppTransition(transit, false); 3405 } 3406 3407 void updateTaskMovement(TaskRecord task, boolean toFront) { 3408 if (task.isPersistable) { 3409 task.mLastTimeMoved = System.currentTimeMillis(); 3410 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3411 // recently will be most negative, tasks sent to the bottom before that will be less 3412 // negative. Similarly for recent tasks moved to the top which will be most positive. 3413 if (!toFront) { 3414 task.mLastTimeMoved *= -1; 3415 } 3416 } 3417 } 3418 3419 void moveHomeStackTaskToTop(int homeStackTaskType) { 3420 final int top = mTaskHistory.size() - 1; 3421 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3422 final TaskRecord task = mTaskHistory.get(taskNdx); 3423 if (task.taskType == homeStackTaskType) { 3424 if (DEBUG_TASKS || DEBUG_STACK) 3425 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3426 mTaskHistory.remove(taskNdx); 3427 mTaskHistory.add(top, task); 3428 updateTaskMovement(task, true); 3429 mWindowManager.moveTaskToTop(task.taskId); 3430 return; 3431 } 3432 } 3433 } 3434 3435 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3436 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3437 3438 final int numTasks = mTaskHistory.size(); 3439 final int index = mTaskHistory.indexOf(tr); 3440 if (numTasks == 0 || index < 0) { 3441 // nothing to do! 3442 if (reason != null && 3443 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3444 ActivityOptions.abort(options); 3445 } else { 3446 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3447 } 3448 return; 3449 } 3450 3451 moveToFront(); 3452 3453 // Shift all activities with this task up to the top 3454 // of the stack, keeping them in the same internal order. 3455 insertTaskAtTop(tr); 3456 3457 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3458 if (reason != null && 3459 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3460 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3461 ActivityRecord r = topRunningActivityLocked(null); 3462 if (r != null) { 3463 mNoAnimActivities.add(r); 3464 } 3465 ActivityOptions.abort(options); 3466 } else { 3467 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3468 } 3469 3470 mWindowManager.moveTaskToTop(tr.taskId); 3471 3472 mStackSupervisor.resumeTopActivitiesLocked(); 3473 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3474 3475 if (VALIDATE_TOKENS) { 3476 validateAppTokensLocked(); 3477 } 3478 } 3479 3480 /** 3481 * Worker method for rearranging history stack. Implements the function of moving all 3482 * activities for a specific task (gathering them if disjoint) into a single group at the 3483 * bottom of the stack. 3484 * 3485 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3486 * to premeptively cancel the move. 3487 * 3488 * @param taskId The taskId to collect and move to the bottom. 3489 * @return Returns true if the move completed, false if not. 3490 */ 3491 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3492 final TaskRecord tr = taskForIdLocked(taskId); 3493 if (tr == null) { 3494 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3495 return false; 3496 } 3497 3498 Slog.i(TAG, "moveTaskToBack: " + tr); 3499 3500 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3501 3502 // If we have a watcher, preflight the move before committing to it. First check 3503 // for *other* available tasks, but if none are available, then try again allowing the 3504 // current task to be selected. 3505 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3506 ActivityRecord next = topRunningActivityLocked(null, taskId); 3507 if (next == null) { 3508 next = topRunningActivityLocked(null, 0); 3509 } 3510 if (next != null) { 3511 // ask watcher if this is allowed 3512 boolean moveOK = true; 3513 try { 3514 moveOK = mService.mController.activityResuming(next.packageName); 3515 } catch (RemoteException e) { 3516 mService.mController = null; 3517 Watchdog.getInstance().setActivityController(null); 3518 } 3519 if (!moveOK) { 3520 return false; 3521 } 3522 } 3523 } 3524 3525 if (DEBUG_TRANSITION) Slog.v(TAG, 3526 "Prepare to back transition: task=" + taskId); 3527 3528 mTaskHistory.remove(tr); 3529 mTaskHistory.add(0, tr); 3530 updateTaskMovement(tr, false); 3531 3532 // There is an assumption that moving a task to the back moves it behind the home activity. 3533 // We make sure here that some activity in the stack will launch home. 3534 int numTasks = mTaskHistory.size(); 3535 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3536 final TaskRecord task = mTaskHistory.get(taskNdx); 3537 if (task.isOverHomeStack()) { 3538 break; 3539 } 3540 if (taskNdx == 1) { 3541 // Set the last task before tr to go to home. 3542 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3543 } 3544 } 3545 3546 if (reason != null && 3547 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3548 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3549 ActivityRecord r = topRunningActivityLocked(null); 3550 if (r != null) { 3551 mNoAnimActivities.add(r); 3552 } 3553 } else { 3554 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3555 } 3556 mWindowManager.moveTaskToBottom(taskId); 3557 3558 if (VALIDATE_TOKENS) { 3559 validateAppTokensLocked(); 3560 } 3561 3562 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3563 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3564 final int taskToReturnTo = tr.getTaskToReturnTo(); 3565 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3566 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3567 } 3568 3569 mStackSupervisor.resumeTopActivitiesLocked(); 3570 return true; 3571 } 3572 3573 static final void logStartActivity(int tag, ActivityRecord r, 3574 TaskRecord task) { 3575 final Uri data = r.intent.getData(); 3576 final String strData = data != null ? data.toSafeString() : null; 3577 3578 EventLog.writeEvent(tag, 3579 r.userId, System.identityHashCode(r), task.taskId, 3580 r.shortComponentName, r.intent.getAction(), 3581 r.intent.getType(), strData, r.intent.getFlags()); 3582 } 3583 3584 /** 3585 * Make sure the given activity matches the current configuration. Returns 3586 * false if the activity had to be destroyed. Returns true if the 3587 * configuration is the same, or the activity will remain running as-is 3588 * for whatever reason. Ensures the HistoryRecord is updated with the 3589 * correct configuration and all other bookkeeping is handled. 3590 */ 3591 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3592 int globalChanges) { 3593 if (mConfigWillChange) { 3594 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3595 "Skipping config check (will change): " + r); 3596 return true; 3597 } 3598 3599 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3600 "Ensuring correct configuration: " + r); 3601 3602 // Short circuit: if the two configurations are the exact same 3603 // object (the common case), then there is nothing to do. 3604 Configuration newConfig = mService.mConfiguration; 3605 if (r.configuration == newConfig && !r.forceNewConfig) { 3606 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3607 "Configuration unchanged in " + r); 3608 return true; 3609 } 3610 3611 // We don't worry about activities that are finishing. 3612 if (r.finishing) { 3613 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3614 "Configuration doesn't matter in finishing " + r); 3615 r.stopFreezingScreenLocked(false); 3616 return true; 3617 } 3618 3619 // Okay we now are going to make this activity have the new config. 3620 // But then we need to figure out how it needs to deal with that. 3621 Configuration oldConfig = r.configuration; 3622 r.configuration = newConfig; 3623 3624 // Determine what has changed. May be nothing, if this is a config 3625 // that has come back from the app after going idle. In that case 3626 // we just want to leave the official config object now in the 3627 // activity and do nothing else. 3628 final int changes = oldConfig.diff(newConfig); 3629 if (changes == 0 && !r.forceNewConfig) { 3630 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3631 "Configuration no differences in " + r); 3632 return true; 3633 } 3634 3635 // If the activity isn't currently running, just leave the new 3636 // configuration and it will pick that up next time it starts. 3637 if (r.app == null || r.app.thread == null) { 3638 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3639 "Configuration doesn't matter not running " + r); 3640 r.stopFreezingScreenLocked(false); 3641 r.forceNewConfig = false; 3642 return true; 3643 } 3644 3645 // Figure out how to handle the changes between the configurations. 3646 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3647 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3648 + Integer.toHexString(changes) + ", handles=0x" 3649 + Integer.toHexString(r.info.getRealConfigChanged()) 3650 + ", newConfig=" + newConfig); 3651 } 3652 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3653 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3654 r.configChangeFlags |= changes; 3655 r.startFreezingScreenLocked(r.app, globalChanges); 3656 r.forceNewConfig = false; 3657 if (r.app == null || r.app.thread == null) { 3658 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3659 "Config is destroying non-running " + r); 3660 destroyActivityLocked(r, true, "config"); 3661 } else if (r.state == ActivityState.PAUSING) { 3662 // A little annoying: we are waiting for this activity to 3663 // finish pausing. Let's not do anything now, but just 3664 // flag that it needs to be restarted when done pausing. 3665 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3666 "Config is skipping already pausing " + r); 3667 r.configDestroy = true; 3668 return true; 3669 } else if (r.state == ActivityState.RESUMED) { 3670 // Try to optimize this case: the configuration is changing 3671 // and we need to restart the top, resumed activity. 3672 // Instead of doing the normal handshaking, just say 3673 // "restart!". 3674 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3675 "Config is relaunching resumed " + r); 3676 relaunchActivityLocked(r, r.configChangeFlags, true); 3677 r.configChangeFlags = 0; 3678 } else { 3679 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3680 "Config is relaunching non-resumed " + r); 3681 relaunchActivityLocked(r, r.configChangeFlags, false); 3682 r.configChangeFlags = 0; 3683 } 3684 3685 // All done... tell the caller we weren't able to keep this 3686 // activity around. 3687 return false; 3688 } 3689 3690 // Default case: the activity can handle this new configuration, so 3691 // hand it over. Note that we don't need to give it the new 3692 // configuration, since we always send configuration changes to all 3693 // process when they happen so it can just use whatever configuration 3694 // it last got. 3695 if (r.app != null && r.app.thread != null) { 3696 try { 3697 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3698 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3699 } catch (RemoteException e) { 3700 // If process died, whatever. 3701 } 3702 } 3703 r.stopFreezingScreenLocked(false); 3704 3705 return true; 3706 } 3707 3708 private boolean relaunchActivityLocked(ActivityRecord r, 3709 int changes, boolean andResume) { 3710 List<ResultInfo> results = null; 3711 List<Intent> newIntents = null; 3712 if (andResume) { 3713 results = r.results; 3714 newIntents = r.newIntents; 3715 } 3716 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3717 + " with results=" + results + " newIntents=" + newIntents 3718 + " andResume=" + andResume); 3719 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3720 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3721 r.task.taskId, r.shortComponentName); 3722 3723 r.startFreezingScreenLocked(r.app, 0); 3724 3725 mStackSupervisor.removeChildActivityContainers(r); 3726 3727 try { 3728 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3729 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3730 + r); 3731 r.forceNewConfig = false; 3732 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3733 changes, !andResume, new Configuration(mService.mConfiguration)); 3734 // Note: don't need to call pauseIfSleepingLocked() here, because 3735 // the caller will only pass in 'andResume' if this activity is 3736 // currently resumed, which implies we aren't sleeping. 3737 } catch (RemoteException e) { 3738 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3739 } 3740 3741 if (andResume) { 3742 r.results = null; 3743 r.newIntents = null; 3744 r.state = ActivityState.RESUMED; 3745 } else { 3746 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3747 r.state = ActivityState.PAUSED; 3748 } 3749 3750 return true; 3751 } 3752 3753 boolean willActivityBeVisibleLocked(IBinder token) { 3754 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3755 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3756 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3757 final ActivityRecord r = activities.get(activityNdx); 3758 if (r.appToken == token) { 3759 return true; 3760 } 3761 if (r.fullscreen && !r.finishing) { 3762 return false; 3763 } 3764 } 3765 } 3766 final ActivityRecord r = ActivityRecord.forToken(token); 3767 if (r == null) { 3768 return false; 3769 } 3770 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3771 + " would have returned true for r=" + r); 3772 return !r.finishing; 3773 } 3774 3775 void closeSystemDialogsLocked() { 3776 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3777 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3778 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3779 final ActivityRecord r = activities.get(activityNdx); 3780 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3781 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3782 } 3783 } 3784 } 3785 } 3786 3787 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3788 boolean didSomething = false; 3789 TaskRecord lastTask = null; 3790 ComponentName homeActivity = null; 3791 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3792 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3793 int numActivities = activities.size(); 3794 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3795 ActivityRecord r = activities.get(activityNdx); 3796 final boolean samePackage = r.packageName.equals(name) 3797 || (name == null && r.userId == userId); 3798 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3799 && (samePackage || r.task == lastTask) 3800 && (r.app == null || evenPersistent || !r.app.persistent)) { 3801 if (!doit) { 3802 if (r.finishing) { 3803 // If this activity is just finishing, then it is not 3804 // interesting as far as something to stop. 3805 continue; 3806 } 3807 return true; 3808 } 3809 if (r.isHomeActivity()) { 3810 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3811 Slog.i(TAG, "Skip force-stop again " + r); 3812 continue; 3813 } else { 3814 homeActivity = r.realActivity; 3815 } 3816 } 3817 didSomething = true; 3818 Slog.i(TAG, " Force finishing activity " + r); 3819 if (samePackage) { 3820 if (r.app != null) { 3821 r.app.removed = true; 3822 } 3823 r.app = null; 3824 } 3825 lastTask = r.task; 3826 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3827 true)) { 3828 // r has been deleted from mActivities, accommodate. 3829 --numActivities; 3830 --activityNdx; 3831 } 3832 } 3833 } 3834 } 3835 return didSomething; 3836 } 3837 3838 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3839 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3840 final TaskRecord task = mTaskHistory.get(taskNdx); 3841 ActivityRecord r = null; 3842 ActivityRecord top = null; 3843 int numActivities = 0; 3844 int numRunning = 0; 3845 final ArrayList<ActivityRecord> activities = task.mActivities; 3846 if (activities.isEmpty()) { 3847 continue; 3848 } 3849 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3850 continue; 3851 } 3852 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3853 r = activities.get(activityNdx); 3854 3855 // Initialize state for next task if needed. 3856 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3857 top = r; 3858 numActivities = numRunning = 0; 3859 } 3860 3861 // Add 'r' into the current task. 3862 numActivities++; 3863 if (r.app != null && r.app.thread != null) { 3864 numRunning++; 3865 } 3866 3867 if (localLOGV) Slog.v( 3868 TAG, r.intent.getComponent().flattenToShortString() 3869 + ": task=" + r.task); 3870 } 3871 3872 RunningTaskInfo ci = new RunningTaskInfo(); 3873 ci.id = task.taskId; 3874 ci.baseActivity = r.intent.getComponent(); 3875 ci.topActivity = top.intent.getComponent(); 3876 ci.lastActiveTime = task.lastActiveTime; 3877 3878 if (top.task != null) { 3879 ci.description = top.task.lastDescription; 3880 } 3881 ci.numActivities = numActivities; 3882 ci.numRunning = numRunning; 3883 //System.out.println( 3884 // "#" + maxNum + ": " + " descr=" + ci.description); 3885 list.add(ci); 3886 } 3887 } 3888 3889 public void unhandledBackLocked() { 3890 final int top = mTaskHistory.size() - 1; 3891 if (DEBUG_SWITCH) Slog.d( 3892 TAG, "Performing unhandledBack(): top activity at " + top); 3893 if (top >= 0) { 3894 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3895 int activityTop = activities.size() - 1; 3896 if (activityTop > 0) { 3897 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3898 "unhandled-back", true); 3899 } 3900 } 3901 } 3902 3903 /** 3904 * Reset local parameters because an app's activity died. 3905 * @param app The app of the activity that died. 3906 * @return result from removeHistoryRecordsForAppLocked. 3907 */ 3908 boolean handleAppDiedLocked(ProcessRecord app) { 3909 if (mPausingActivity != null && mPausingActivity.app == app) { 3910 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3911 "App died while pausing: " + mPausingActivity); 3912 mPausingActivity = null; 3913 } 3914 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3915 mLastPausedActivity = null; 3916 mLastNoHistoryActivity = null; 3917 } 3918 3919 return removeHistoryRecordsForAppLocked(app); 3920 } 3921 3922 void handleAppCrashLocked(ProcessRecord app) { 3923 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3924 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3925 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3926 final ActivityRecord r = activities.get(activityNdx); 3927 if (r.app == app) { 3928 Slog.w(TAG, " Force finishing activity " 3929 + r.intent.getComponent().flattenToShortString()); 3930 // Force the destroy to skip right to removal. 3931 r.app = null; 3932 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3933 } 3934 } 3935 } 3936 } 3937 3938 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3939 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3940 boolean printed = false; 3941 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3942 final TaskRecord task = mTaskHistory.get(taskNdx); 3943 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3944 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3945 dumpClient, dumpPackage, needSep, header, 3946 " Task id #" + task.taskId); 3947 if (printed) { 3948 header = null; 3949 } 3950 } 3951 return printed; 3952 } 3953 3954 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3955 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3956 3957 if ("all".equals(name)) { 3958 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3959 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3960 } 3961 } else if ("top".equals(name)) { 3962 final int top = mTaskHistory.size() - 1; 3963 if (top >= 0) { 3964 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3965 int listTop = list.size() - 1; 3966 if (listTop >= 0) { 3967 activities.add(list.get(listTop)); 3968 } 3969 } 3970 } else { 3971 ItemMatcher matcher = new ItemMatcher(); 3972 matcher.build(name); 3973 3974 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3975 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3976 if (matcher.match(r1, r1.intent.getComponent())) { 3977 activities.add(r1); 3978 } 3979 } 3980 } 3981 } 3982 3983 return activities; 3984 } 3985 3986 ActivityRecord restartPackage(String packageName) { 3987 ActivityRecord starting = topRunningActivityLocked(null); 3988 3989 // All activities that came from the package must be 3990 // restarted as if there was a config change. 3991 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3992 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3993 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3994 final ActivityRecord a = activities.get(activityNdx); 3995 if (a.info.packageName.equals(packageName)) { 3996 a.forceNewConfig = true; 3997 if (starting != null && a == starting && a.visible) { 3998 a.startFreezingScreenLocked(starting.app, 3999 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4000 } 4001 } 4002 } 4003 } 4004 4005 return starting; 4006 } 4007 4008 void removeTask(TaskRecord task) { 4009 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4010 mWindowManager.removeTask(task.taskId); 4011 final ActivityRecord r = mResumedActivity; 4012 if (r != null && r.task == task) { 4013 mResumedActivity = null; 4014 } 4015 4016 final int taskNdx = mTaskHistory.indexOf(task); 4017 final int topTaskNdx = mTaskHistory.size() - 1; 4018 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4019 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4020 if (!nextTask.isOverHomeStack()) { 4021 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4022 } 4023 } 4024 mTaskHistory.remove(task); 4025 updateTaskMovement(task, true); 4026 4027 if (task.mActivities.isEmpty()) { 4028 final boolean isVoiceSession = task.voiceSession != null; 4029 if (isVoiceSession) { 4030 try { 4031 task.voiceSession.taskFinished(task.intent, task.taskId); 4032 } catch (RemoteException e) { 4033 } 4034 } 4035 if (task.autoRemoveFromRecents() || isVoiceSession) { 4036 // Task creator asked to remove this when done, or this task was a voice 4037 // interaction, so it should not remain on the recent tasks list. 4038 mService.mRecentTasks.remove(task); 4039 task.removedFromRecents(mService.mTaskPersister); 4040 } 4041 } 4042 4043 if (mTaskHistory.isEmpty()) { 4044 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4045 if (isOnHomeDisplay()) { 4046 mStackSupervisor.moveHomeStack(!isHomeStack()); 4047 } 4048 if (mStacks != null) { 4049 mStacks.remove(this); 4050 mStacks.add(0, this); 4051 } 4052 mActivityContainer.onTaskListEmptyLocked(); 4053 } 4054 } 4055 4056 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4057 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4058 boolean toTop) { 4059 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4060 voiceInteractor); 4061 addTask(task, toTop, false); 4062 return task; 4063 } 4064 4065 ArrayList<TaskRecord> getAllTasks() { 4066 return new ArrayList<TaskRecord>(mTaskHistory); 4067 } 4068 4069 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4070 task.stack = this; 4071 if (toTop) { 4072 insertTaskAtTop(task); 4073 } else { 4074 mTaskHistory.add(0, task); 4075 updateTaskMovement(task, false); 4076 } 4077 if (!moving && task.voiceSession != null) { 4078 try { 4079 task.voiceSession.taskStarted(task.intent, task.taskId); 4080 } catch (RemoteException e) { 4081 } 4082 } 4083 } 4084 4085 public int getStackId() { 4086 return mStackId; 4087 } 4088 4089 @Override 4090 public String toString() { 4091 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4092 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4093 } 4094} 4095