ActivityStack.java revision 44f60cca7bb31e2f9b4b7bf25bb2e0cfb0e3e1e1
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.content.ReferrerIntent; 48import com.android.internal.os.BatteryStatsImpl; 49import com.android.server.Watchdog; 50import com.android.server.am.ActivityManagerService.ItemMatcher; 51import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 52import com.android.server.wm.AppTransition; 53import com.android.server.wm.TaskGroup; 54import com.android.server.wm.WindowManagerService; 55 56import android.app.Activity; 57import android.app.ActivityManager; 58import android.app.ActivityOptions; 59import android.app.AppGlobals; 60import android.app.IActivityController; 61import android.app.ResultInfo; 62import android.app.ActivityManager.RunningTaskInfo; 63import android.content.ComponentName; 64import android.content.Intent; 65import android.content.pm.ActivityInfo; 66import android.content.pm.PackageManager; 67import android.content.res.Configuration; 68import android.content.res.Resources; 69import android.graphics.Bitmap; 70import android.net.Uri; 71import android.os.Binder; 72import android.os.Bundle; 73import android.os.Debug; 74import android.os.Handler; 75import android.os.IBinder; 76import android.os.Looper; 77import android.os.Message; 78import android.os.PersistableBundle; 79import android.os.RemoteException; 80import android.os.SystemClock; 81import android.os.Trace; 82import android.os.UserHandle; 83import android.service.voice.IVoiceInteractionSession; 84import android.util.EventLog; 85import android.util.Slog; 86import android.view.Display; 87 88import java.io.FileDescriptor; 89import java.io.PrintWriter; 90import java.lang.ref.WeakReference; 91import java.util.ArrayList; 92import java.util.Iterator; 93import java.util.List; 94import java.util.Objects; 95 96/** 97 * State and management of a single stack of activities. 98 */ 99final class ActivityStack { 100 101 // Ticks during which we check progress while waiting for an app to launch. 102 static final int LAUNCH_TICK = 500; 103 104 // How long we wait until giving up on the last activity to pause. This 105 // is short because it directly impacts the responsiveness of starting the 106 // next activity. 107 static final int PAUSE_TIMEOUT = 500; 108 109 // How long we wait for the activity to tell us it has stopped before 110 // giving up. This is a good amount of time because we really need this 111 // from the application in order to get its saved state. 112 static final int STOP_TIMEOUT = 10*1000; 113 114 // How long we wait until giving up on an activity telling us it has 115 // finished destroying itself. 116 static final int DESTROY_TIMEOUT = 10*1000; 117 118 // How long until we reset a task when the user returns to it. Currently 119 // disabled. 120 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 121 122 // How long between activity launches that we consider safe to not warn 123 // the user about an unexpected activity being launched on top. 124 static final long START_WARN_TIME = 5*1000; 125 126 // Set to false to disable the preview that is shown while a new activity 127 // is being started. 128 static final boolean SHOW_APP_STARTING_PREVIEW = true; 129 130 // How long to wait for all background Activities to redraw following a call to 131 // convertToTranslucent(). 132 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 133 134 static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic(); 135 136 enum ActivityState { 137 INITIALIZING, 138 RESUMED, 139 PAUSING, 140 PAUSED, 141 STOPPING, 142 STOPPED, 143 FINISHING, 144 DESTROYING, 145 DESTROYED 146 } 147 148 final ActivityManagerService mService; 149 final WindowManagerService mWindowManager; 150 151 /** 152 * The back history of all previous (and possibly still 153 * running) activities. It contains #TaskRecord objects. 154 */ 155 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 156 157 /** 158 * Used for validating app tokens with window manager. 159 */ 160 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 161 162 /** 163 * List of running activities, sorted by recent usage. 164 * The first entry in the list is the least recently used. 165 * It contains HistoryRecord objects. 166 */ 167 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 168 169 /** 170 * Animations that for the current transition have requested not to 171 * be considered for the transition animation. 172 */ 173 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 174 175 /** 176 * When we are in the process of pausing an activity, before starting the 177 * next one, this variable holds the activity that is currently being paused. 178 */ 179 ActivityRecord mPausingActivity = null; 180 181 /** 182 * This is the last activity that we put into the paused state. This is 183 * used to determine if we need to do an activity transition while sleeping, 184 * when we normally hold the top activity paused. 185 */ 186 ActivityRecord mLastPausedActivity = null; 187 188 /** 189 * Activities that specify No History must be removed once the user navigates away from them. 190 * If the device goes to sleep with such an activity in the paused state then we save it here 191 * and finish it later if another activity replaces it on wakeup. 192 */ 193 ActivityRecord mLastNoHistoryActivity = null; 194 195 /** 196 * Current activity that is resumed, or null if there is none. 197 */ 198 ActivityRecord mResumedActivity = null; 199 200 /** 201 * This is the last activity that has been started. It is only used to 202 * identify when multiple activities are started at once so that the user 203 * can be warned they may not be in the activity they think they are. 204 */ 205 ActivityRecord mLastStartedActivity = null; 206 207 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 208 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 209 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 210 // Activity in mTranslucentActivityWaiting is notified via 211 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 212 // background activity being drawn then the same call will be made with a true value. 213 ActivityRecord mTranslucentActivityWaiting = null; 214 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 215 new ArrayList<ActivityRecord>(); 216 217 /** 218 * Set when we know we are going to be calling updateConfiguration() 219 * soon, so want to skip intermediate config checks. 220 */ 221 boolean mConfigWillChange; 222 223 long mLaunchStartTime = 0; 224 long mFullyDrawnStartTime = 0; 225 226 /** 227 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 228 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 229 */ 230 private ActivityRecord mLastScreenshotActivity = null; 231 private Bitmap mLastScreenshotBitmap = null; 232 233 int mCurrentUser; 234 235 final int mStackId; 236 final ActivityContainer mActivityContainer; 237 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 238 ArrayList<ActivityStack> mStacks; 239 /** The attached Display's unique identifier, or -1 if detached */ 240 int mDisplayId; 241 242 /** Run all ActivityStacks through this */ 243 final ActivityStackSupervisor mStackSupervisor; 244 245 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 246 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 247 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 248 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 249 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 250 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 251 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 252 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 253 254 static class ScheduleDestroyArgs { 255 final ProcessRecord mOwner; 256 final String mReason; 257 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 258 mOwner = owner; 259 mReason = reason; 260 } 261 } 262 263 final Handler mHandler; 264 265 final class ActivityStackHandler extends Handler { 266 //public Handler() { 267 // if (localLOGV) Slog.v(TAG, "Handler started!"); 268 //} 269 ActivityStackHandler(Looper looper) { 270 super(looper); 271 } 272 273 @Override 274 public void handleMessage(Message msg) { 275 switch (msg.what) { 276 case PAUSE_TIMEOUT_MSG: { 277 ActivityRecord r = (ActivityRecord)msg.obj; 278 // We don't at this point know if the activity is fullscreen, 279 // so we need to be conservative and assume it isn't. 280 Slog.w(TAG, "Activity pause timeout for " + r); 281 synchronized (mService) { 282 if (r.app != null) { 283 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 284 } 285 activityPausedLocked(r.appToken, true); 286 } 287 } break; 288 case LAUNCH_TICK_MSG: { 289 ActivityRecord r = (ActivityRecord)msg.obj; 290 synchronized (mService) { 291 if (r.continueLaunchTickingLocked()) { 292 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 293 } 294 } 295 } break; 296 case DESTROY_TIMEOUT_MSG: { 297 ActivityRecord r = (ActivityRecord)msg.obj; 298 // We don't at this point know if the activity is fullscreen, 299 // so we need to be conservative and assume it isn't. 300 Slog.w(TAG, "Activity destroy timeout for " + r); 301 synchronized (mService) { 302 activityDestroyedLocked(r != null ? r.appToken : null); 303 } 304 } break; 305 case STOP_TIMEOUT_MSG: { 306 ActivityRecord r = (ActivityRecord)msg.obj; 307 // We don't at this point know if the activity is fullscreen, 308 // so we need to be conservative and assume it isn't. 309 Slog.w(TAG, "Activity stop timeout for " + r); 310 synchronized (mService) { 311 if (r.isInHistory()) { 312 activityStoppedLocked(r, null, null, null); 313 } 314 } 315 } break; 316 case DESTROY_ACTIVITIES_MSG: { 317 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 318 synchronized (mService) { 319 destroyActivitiesLocked(args.mOwner, args.mReason); 320 } 321 } break; 322 case TRANSLUCENT_TIMEOUT_MSG: { 323 synchronized (mService) { 324 notifyActivityDrawnLocked(null); 325 } 326 } break; 327 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 328 synchronized (mService) { 329 final ActivityRecord r = getVisibleBehindActivity(); 330 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 331 if (r != null) { 332 mService.killAppAtUsersRequest(r.app, null); 333 } 334 } 335 } break; 336 } 337 } 338 } 339 340 int numActivities() { 341 int count = 0; 342 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 343 count += mTaskHistory.get(taskNdx).mActivities.size(); 344 } 345 return count; 346 } 347 348 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 349 mActivityContainer = activityContainer; 350 mStackSupervisor = activityContainer.getOuter(); 351 mService = mStackSupervisor.mService; 352 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 353 mWindowManager = mService.mWindowManager; 354 mStackId = activityContainer.mStackId; 355 mCurrentUser = mService.mCurrentUserId; 356 } 357 358 /** 359 * Checks whether the userid is a profile of the current user. 360 */ 361 private boolean isCurrentProfileLocked(int userId) { 362 if (userId == mCurrentUser) return true; 363 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 364 if (mService.mCurrentProfileIds[i] == userId) return true; 365 } 366 return false; 367 } 368 369 boolean okToShowLocked(ActivityRecord r) { 370 return isCurrentProfileLocked(r.userId) 371 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 372 } 373 374 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 375 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 376 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 377 if (r != null) { 378 return r; 379 } 380 } 381 return null; 382 } 383 384 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 385 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 386 final TaskRecord task = mTaskHistory.get(taskNdx); 387 final ArrayList<ActivityRecord> activities = task.mActivities; 388 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 389 ActivityRecord r = activities.get(activityNdx); 390 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 391 return r; 392 } 393 } 394 } 395 return null; 396 } 397 398 /** 399 * This is a simplified version of topRunningActivityLocked that provides a number of 400 * optional skip-over modes. It is intended for use with the ActivityController hook only. 401 * 402 * @param token If non-null, any history records matching this token will be skipped. 403 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 404 * 405 * @return Returns the HistoryRecord of the next activity on the stack. 406 */ 407 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 408 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 409 TaskRecord task = mTaskHistory.get(taskNdx); 410 if (task.taskId == taskId) { 411 continue; 412 } 413 ArrayList<ActivityRecord> activities = task.mActivities; 414 for (int i = activities.size() - 1; i >= 0; --i) { 415 final ActivityRecord r = activities.get(i); 416 // Note: the taskId check depends on real taskId fields being non-zero 417 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 418 return r; 419 } 420 } 421 } 422 return null; 423 } 424 425 final ActivityRecord topActivity() { 426 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 427 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 428 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 429 final ActivityRecord r = activities.get(activityNdx); 430 if (!r.finishing) { 431 return r; 432 } 433 } 434 } 435 return null; 436 } 437 438 final TaskRecord topTask() { 439 final int size = mTaskHistory.size(); 440 if (size > 0) { 441 return mTaskHistory.get(size - 1); 442 } 443 return null; 444 } 445 446 TaskRecord taskForIdLocked(int id) { 447 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 448 final TaskRecord task = mTaskHistory.get(taskNdx); 449 if (task.taskId == id) { 450 return task; 451 } 452 } 453 return null; 454 } 455 456 ActivityRecord isInStackLocked(IBinder token) { 457 final ActivityRecord r = ActivityRecord.forToken(token); 458 if (r != null) { 459 final TaskRecord task = r.task; 460 if (task != null && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 461 if (task.stack != this) Slog.w(TAG, 462 "Illegal state! task does not point to stack it is in."); 463 return r; 464 } 465 } 466 return null; 467 } 468 469 final boolean updateLRUListLocked(ActivityRecord r) { 470 final boolean hadit = mLRUActivities.remove(r); 471 mLRUActivities.add(r); 472 return hadit; 473 } 474 475 final boolean isHomeStack() { 476 return mStackId == HOME_STACK_ID; 477 } 478 479 final boolean isOnHomeDisplay() { 480 return isAttached() && 481 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 482 } 483 484 final void moveToFront() { 485 if (isAttached()) { 486 if (isOnHomeDisplay()) { 487 mStackSupervisor.moveHomeStack(isHomeStack()); 488 } 489 mStacks.remove(this); 490 mStacks.add(this); 491 } 492 } 493 494 final boolean isAttached() { 495 return mStacks != null; 496 } 497 498 /** 499 * Returns the top activity in any existing task matching the given 500 * Intent. Returns null if no such task is found. 501 */ 502 ActivityRecord findTaskLocked(ActivityRecord target) { 503 Intent intent = target.intent; 504 ActivityInfo info = target.info; 505 ComponentName cls = intent.getComponent(); 506 if (info.targetActivity != null) { 507 cls = new ComponentName(info.packageName, info.targetActivity); 508 } 509 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 510 boolean isDocument = intent != null & intent.isDocument(); 511 // If documentData is non-null then it must match the existing task data. 512 Uri documentData = isDocument ? intent.getData() : null; 513 514 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 515 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 516 final TaskRecord task = mTaskHistory.get(taskNdx); 517 if (task.voiceSession != null) { 518 // We never match voice sessions; those always run independently. 519 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 520 continue; 521 } 522 if (task.userId != userId) { 523 // Looking for a different task. 524 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 525 continue; 526 } 527 final ActivityRecord r = task.getTopActivity(); 528 if (r == null || r.finishing || r.userId != userId || 529 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 530 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 531 continue; 532 } 533 534 final Intent taskIntent = task.intent; 535 final Intent affinityIntent = task.affinityIntent; 536 final boolean taskIsDocument; 537 final Uri taskDocumentData; 538 if (taskIntent != null && taskIntent.isDocument()) { 539 taskIsDocument = true; 540 taskDocumentData = taskIntent.getData(); 541 } else if (affinityIntent != null && affinityIntent.isDocument()) { 542 taskIsDocument = true; 543 taskDocumentData = affinityIntent.getData(); 544 } else { 545 taskIsDocument = false; 546 taskDocumentData = null; 547 } 548 549 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 550 + taskIntent.getComponent().flattenToShortString() 551 + "/aff=" + r.task.rootAffinity + " to new cls=" 552 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 553 if (!isDocument && !taskIsDocument && task.rootAffinity != null) { 554 if (task.rootAffinity.equals(target.taskAffinity)) { 555 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 556 return r; 557 } 558 } else if (taskIntent != null && taskIntent.getComponent() != null && 559 taskIntent.getComponent().compareTo(cls) == 0 && 560 Objects.equals(documentData, taskDocumentData)) { 561 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 562 //dump(); 563 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 564 + r.intent); 565 return r; 566 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 567 affinityIntent.getComponent().compareTo(cls) == 0 && 568 Objects.equals(documentData, taskDocumentData)) { 569 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 570 //dump(); 571 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 572 + r.intent); 573 return r; 574 } else if (DEBUG_TASKS) { 575 Slog.d(TAG, "Not a match: " + task); 576 } 577 } 578 579 return null; 580 } 581 582 /** 583 * Returns the first activity (starting from the top of the stack) that 584 * is the same as the given activity. Returns null if no such activity 585 * is found. 586 */ 587 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 588 ComponentName cls = intent.getComponent(); 589 if (info.targetActivity != null) { 590 cls = new ComponentName(info.packageName, info.targetActivity); 591 } 592 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 593 594 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 595 TaskRecord task = mTaskHistory.get(taskNdx); 596 if (!isCurrentProfileLocked(task.userId)) { 597 return null; 598 } 599 final ArrayList<ActivityRecord> activities = task.mActivities; 600 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 601 ActivityRecord r = activities.get(activityNdx); 602 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 603 //Slog.i(TAG, "Found matching class!"); 604 //dump(); 605 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 606 return r; 607 } 608 } 609 } 610 611 return null; 612 } 613 614 /* 615 * Move the activities around in the stack to bring a user to the foreground. 616 */ 617 final void switchUserLocked(int userId) { 618 if (mCurrentUser == userId) { 619 return; 620 } 621 mCurrentUser = userId; 622 623 // Move userId's tasks to the top. 624 int index = mTaskHistory.size(); 625 for (int i = 0; i < index; ) { 626 TaskRecord task = mTaskHistory.get(i); 627 if (isCurrentProfileLocked(task.userId)) { 628 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 629 " moving " + task + " to top"); 630 mTaskHistory.remove(i); 631 mTaskHistory.add(task); 632 --index; 633 // Use same value for i. 634 } else { 635 ++i; 636 } 637 } 638 if (VALIDATE_TOKENS) { 639 validateAppTokensLocked(); 640 } 641 } 642 643 void minimalResumeActivityLocked(ActivityRecord r) { 644 r.state = ActivityState.RESUMED; 645 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 646 + " (starting new instance)"); 647 r.stopped = false; 648 mResumedActivity = r; 649 r.task.touchActiveTime(); 650 mService.addRecentTaskLocked(r.task); 651 completeResumeLocked(r); 652 mStackSupervisor.checkReadyForSleepLocked(); 653 setLaunchTime(r); 654 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 655 } 656 657 private void startLaunchTraces() { 658 if (mFullyDrawnStartTime != 0) { 659 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 660 } 661 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 662 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 663 } 664 665 private void stopFullyDrawnTraceIfNeeded() { 666 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 667 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 668 mFullyDrawnStartTime = 0; 669 } 670 } 671 672 void setLaunchTime(ActivityRecord r) { 673 if (r.displayStartTime == 0) { 674 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 675 if (mLaunchStartTime == 0) { 676 startLaunchTraces(); 677 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 678 } 679 } else if (mLaunchStartTime == 0) { 680 startLaunchTraces(); 681 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 682 } 683 } 684 685 void clearLaunchTime(ActivityRecord r) { 686 // Make sure that there is no activity waiting for this to launch. 687 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 688 r.displayStartTime = r.fullyDrawnStartTime = 0; 689 } else { 690 mStackSupervisor.removeTimeoutsForActivityLocked(r); 691 mStackSupervisor.scheduleIdleTimeoutLocked(r); 692 } 693 } 694 695 void awakeFromSleepingLocked() { 696 // Ensure activities are no longer sleeping. 697 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 698 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 699 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 700 activities.get(activityNdx).setSleeping(false); 701 } 702 } 703 } 704 705 /** 706 * @return true if something must be done before going to sleep. 707 */ 708 boolean checkReadyForSleepLocked() { 709 if (mResumedActivity != null) { 710 // Still have something resumed; can't sleep until it is paused. 711 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 712 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 713 startPausingLocked(false, true, false, false); 714 return true; 715 } 716 if (mPausingActivity != null) { 717 // Still waiting for something to pause; can't sleep yet. 718 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 719 return true; 720 } 721 722 return false; 723 } 724 725 void goToSleep() { 726 ensureActivitiesVisibleLocked(null, 0); 727 728 // Make sure any stopped but visible activities are now sleeping. 729 // This ensures that the activity's onStop() is called. 730 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 731 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 732 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 733 final ActivityRecord r = activities.get(activityNdx); 734 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 735 r.setSleeping(true); 736 } 737 } 738 } 739 } 740 741 /** 742 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 743 * again when requested. 744 */ 745 private void invalidateLastScreenshot() { 746 mLastScreenshotActivity = null; 747 if (mLastScreenshotBitmap != null) { 748 mLastScreenshotBitmap.recycle(); 749 } 750 mLastScreenshotBitmap = null; 751 } 752 753 public final Bitmap screenshotActivities(ActivityRecord who) { 754 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 755 if (who.noDisplay) { 756 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 757 return null; 758 } 759 760 if (isHomeStack()) { 761 // This is an optimization -- since we never show Home or Recents within Recents itself, 762 // we can just go ahead and skip taking the screenshot if this is the home stack. In 763 // the case where the most recent task is not the task that was supplied, then the stack 764 // has changed, so invalidate the last screenshot(). 765 invalidateLastScreenshot(); 766 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 767 return null; 768 } 769 770 int w = mService.mThumbnailWidth; 771 int h = mService.mThumbnailHeight; 772 if (w > 0) { 773 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 774 || mLastScreenshotActivity.state == ActivityState.RESUMED 775 || mLastScreenshotBitmap.getWidth() != w 776 || mLastScreenshotBitmap.getHeight() != h) { 777 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 778 mLastScreenshotActivity = who; 779 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 780 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 781 } 782 if (mLastScreenshotBitmap != null) { 783 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 784 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 785 } 786 } 787 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 788 return null; 789 } 790 791 /** 792 * Start pausing the currently resumed activity. It is an error to call this if there 793 * is already an activity being paused or there is no resumed activity. 794 * 795 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 796 * @param uiSleeping True if this is happening with the user interface going to sleep (the 797 * screen turning off). 798 * @param resuming True if this is being called as part of resuming the top activity, so 799 * we shouldn't try to instigate a resume here. 800 * @param dontWait True if the caller does not want to wait for the pause to complete. If 801 * set to true, we will immediately complete the pause here before returning. 802 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 803 * it to tell us when it is done. 804 */ 805 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 806 boolean dontWait) { 807 if (mPausingActivity != null) { 808 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity); 809 completePauseLocked(false); 810 } 811 ActivityRecord prev = mResumedActivity; 812 if (prev == null) { 813 if (!resuming) { 814 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 815 mStackSupervisor.resumeTopActivitiesLocked(); 816 } 817 return false; 818 } 819 820 if (mActivityContainer.mParentActivity == null) { 821 // Top level stack, not a child. Look for child stacks. 822 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 823 } 824 825 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 826 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 827 mResumedActivity = null; 828 mPausingActivity = prev; 829 mLastPausedActivity = prev; 830 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 831 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 832 prev.state = ActivityState.PAUSING; 833 prev.task.touchActiveTime(); 834 clearLaunchTime(prev); 835 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 836 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 837 prev.updateThumbnail(screenshotActivities(prev), null); 838 } 839 stopFullyDrawnTraceIfNeeded(); 840 841 mService.updateCpuStats(); 842 843 if (prev.app != null && prev.app.thread != null) { 844 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 845 try { 846 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 847 prev.userId, System.identityHashCode(prev), 848 prev.shortComponentName); 849 mService.updateUsageStats(prev, false); 850 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 851 userLeaving, prev.configChangeFlags, dontWait); 852 } catch (Exception e) { 853 // Ignore exception, if process died other code will cleanup. 854 Slog.w(TAG, "Exception thrown during pause", e); 855 mPausingActivity = null; 856 mLastPausedActivity = null; 857 mLastNoHistoryActivity = null; 858 } 859 } else { 860 mPausingActivity = null; 861 mLastPausedActivity = null; 862 mLastNoHistoryActivity = null; 863 } 864 865 // If we are not going to sleep, we want to ensure the device is 866 // awake until the next activity is started. 867 if (!mService.isSleepingOrShuttingDown()) { 868 mStackSupervisor.acquireLaunchWakelock(); 869 } 870 871 if (mPausingActivity != null) { 872 // Have the window manager pause its key dispatching until the new 873 // activity has started. If we're pausing the activity just because 874 // the screen is being turned off and the UI is sleeping, don't interrupt 875 // key dispatch; the same activity will pick it up again on wakeup. 876 if (!uiSleeping) { 877 prev.pauseKeyDispatchingLocked(); 878 } else { 879 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 880 } 881 882 if (dontWait) { 883 // If the caller said they don't want to wait for the pause, then complete 884 // the pause now. 885 completePauseLocked(false); 886 return false; 887 888 } else { 889 // Schedule a pause timeout in case the app doesn't respond. 890 // We don't give it much time because this directly impacts the 891 // responsiveness seen by the user. 892 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 893 msg.obj = prev; 894 prev.pauseTime = SystemClock.uptimeMillis(); 895 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 896 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 897 return true; 898 } 899 900 } else { 901 // This activity failed to schedule the 902 // pause, so just treat it as being paused now. 903 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 904 if (!resuming) { 905 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 906 } 907 return false; 908 } 909 } 910 911 final void activityPausedLocked(IBinder token, boolean timeout) { 912 if (DEBUG_PAUSE) Slog.v( 913 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 914 915 final ActivityRecord r = isInStackLocked(token); 916 if (r != null) { 917 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 918 if (mPausingActivity == r) { 919 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 920 + (timeout ? " (due to timeout)" : " (pause complete)")); 921 completePauseLocked(true); 922 } else { 923 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 924 r.userId, System.identityHashCode(r), r.shortComponentName, 925 mPausingActivity != null 926 ? mPausingActivity.shortComponentName : "(none)"); 927 } 928 } 929 } 930 931 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 932 PersistableBundle persistentState, CharSequence description) { 933 if (r.state != ActivityState.STOPPING) { 934 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 935 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 936 return; 937 } 938 if (persistentState != null) { 939 r.persistentState = persistentState; 940 mService.notifyTaskPersisterLocked(r.task, false); 941 } 942 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 943 if (icicle != null) { 944 // If icicle is null, this is happening due to a timeout, so we 945 // haven't really saved the state. 946 r.icicle = icicle; 947 r.haveState = true; 948 r.launchCount = 0; 949 r.updateThumbnail(null, description); 950 } 951 if (!r.stopped) { 952 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 953 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 954 r.stopped = true; 955 r.state = ActivityState.STOPPED; 956 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 957 mStackSupervisor.requestVisibleBehindLocked(r, false); 958 } 959 if (r.finishing) { 960 r.clearOptionsLocked(); 961 } else { 962 if (r.configDestroy) { 963 destroyActivityLocked(r, true, "stop-config"); 964 mStackSupervisor.resumeTopActivitiesLocked(); 965 } else { 966 mStackSupervisor.updatePreviousProcessLocked(r); 967 } 968 } 969 } 970 } 971 972 private void completePauseLocked(boolean resumeNext) { 973 ActivityRecord prev = mPausingActivity; 974 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 975 976 if (prev != null) { 977 prev.state = ActivityState.PAUSED; 978 if (prev.finishing) { 979 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 980 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 981 } else if (prev.app != null) { 982 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 983 if (prev.waitingVisible) { 984 prev.waitingVisible = false; 985 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 986 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 987 TAG, "Complete pause, no longer waiting: " + prev); 988 } 989 if (prev.configDestroy) { 990 // The previous is being paused because the configuration 991 // is changing, which means it is actually stopping... 992 // To juggle the fact that we are also starting a new 993 // instance right now, we need to first completely stop 994 // the current instance before starting the new one. 995 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 996 destroyActivityLocked(prev, true, "pause-config"); 997 } else if (!hasVisibleBehindActivity()) { 998 // If we were visible then resumeTopActivities will release resources before 999 // stopping. 1000 mStackSupervisor.mStoppingActivities.add(prev); 1001 if (mStackSupervisor.mStoppingActivities.size() > 3 || 1002 prev.frontOfTask && mTaskHistory.size() <= 1) { 1003 // If we already have a few activities waiting to stop, 1004 // then give up on things going idle and start clearing 1005 // them out. Or if r is the last of activity of the last task the stack 1006 // will be empty and must be cleared immediately. 1007 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 1008 mStackSupervisor.scheduleIdleLocked(); 1009 } else { 1010 mStackSupervisor.checkReadyForSleepLocked(); 1011 } 1012 } 1013 } else { 1014 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 1015 prev = null; 1016 } 1017 mPausingActivity = null; 1018 } 1019 1020 if (resumeNext) { 1021 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1022 if (!mService.isSleepingOrShuttingDown()) { 1023 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1024 } else { 1025 mStackSupervisor.checkReadyForSleepLocked(); 1026 ActivityRecord top = topStack.topRunningActivityLocked(null); 1027 if (top == null || (prev != null && top != prev)) { 1028 // If there are no more activities available to run, 1029 // do resume anyway to start something. Also if the top 1030 // activity on the stack is not the just paused activity, 1031 // we need to go ahead and resume it to ensure we complete 1032 // an in-flight app switch. 1033 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1034 } 1035 } 1036 } 1037 1038 if (prev != null) { 1039 prev.resumeKeyDispatchingLocked(); 1040 1041 if (prev.app != null && prev.cpuTimeAtResume > 0 1042 && mService.mBatteryStatsService.isOnBattery()) { 1043 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1044 - prev.cpuTimeAtResume; 1045 if (diff > 0) { 1046 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1047 synchronized (bsi) { 1048 BatteryStatsImpl.Uid.Proc ps = 1049 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1050 prev.info.packageName); 1051 if (ps != null) { 1052 ps.addForegroundTimeLocked(diff); 1053 } 1054 } 1055 } 1056 } 1057 prev.cpuTimeAtResume = 0; // reset it 1058 } 1059 } 1060 1061 /** 1062 * Once we know that we have asked an application to put an activity in 1063 * the resumed state (either by launching it or explicitly telling it), 1064 * this function updates the rest of our state to match that fact. 1065 */ 1066 private void completeResumeLocked(ActivityRecord next) { 1067 next.idle = false; 1068 next.results = null; 1069 next.newIntents = null; 1070 1071 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1072 ProcessRecord app = next.task.mActivities.get(0).app; 1073 if (app != null && app != mService.mHomeProcess) { 1074 mService.mHomeProcess = app; 1075 } 1076 } 1077 1078 if (next.nowVisible) { 1079 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1080 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1081 } 1082 1083 // schedule an idle timeout in case the app doesn't do it for us. 1084 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1085 1086 mStackSupervisor.reportResumedActivityLocked(next); 1087 1088 next.resumeKeyDispatchingLocked(); 1089 mNoAnimActivities.clear(); 1090 1091 // Mark the point when the activity is resuming 1092 // TODO: To be more accurate, the mark should be before the onCreate, 1093 // not after the onResume. But for subsequent starts, onResume is fine. 1094 if (next.app != null) { 1095 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1096 } else { 1097 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1098 } 1099 1100 // If we are resuming the activity that we had last screenshotted, then we know it will be 1101 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1102 if (next == mLastScreenshotActivity) { 1103 invalidateLastScreenshot(); 1104 } 1105 next.returningOptions = null; 1106 1107 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) { 1108 // When resuming an activity, require it to call requestVisibleBehind() again. 1109 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null); 1110 } 1111 } 1112 1113 private void setVisibile(ActivityRecord r, boolean visible) { 1114 r.visible = visible; 1115 mWindowManager.setAppVisibility(r.appToken, visible); 1116 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1117 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1118 ActivityContainer container = containers.get(containerNdx); 1119 container.setVisible(visible); 1120 } 1121 } 1122 1123 // Find the first visible activity above the passed activity and if it is translucent return it 1124 // otherwise return null; 1125 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1126 TaskRecord task = r.task; 1127 if (task == null) { 1128 return null; 1129 } 1130 1131 ActivityStack stack = task.stack; 1132 if (stack == null) { 1133 return null; 1134 } 1135 1136 int stackNdx = mStacks.indexOf(stack); 1137 1138 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1139 int taskNdx = tasks.indexOf(task); 1140 1141 ArrayList<ActivityRecord> activities = task.mActivities; 1142 int activityNdx = activities.indexOf(r) + 1; 1143 1144 final int numStacks = mStacks.size(); 1145 while (stackNdx < numStacks) { 1146 tasks = mStacks.get(stackNdx).mTaskHistory; 1147 final int numTasks = tasks.size(); 1148 while (taskNdx < numTasks) { 1149 activities = tasks.get(taskNdx).mActivities; 1150 final int numActivities = activities.size(); 1151 while (activityNdx < numActivities) { 1152 final ActivityRecord activity = activities.get(activityNdx); 1153 if (!activity.finishing) { 1154 return activity.fullscreen ? null : activity; 1155 } 1156 ++activityNdx; 1157 } 1158 activityNdx = 0; 1159 ++taskNdx; 1160 } 1161 taskNdx = 0; 1162 ++stackNdx; 1163 } 1164 1165 return null; 1166 } 1167 1168 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1169 // If so, this stack is hidden, otherwise it is visible. 1170 private boolean isStackVisible() { 1171 if (!isAttached()) { 1172 return false; 1173 } 1174 1175 if (mStackSupervisor.isFrontStack(this)) { 1176 return true; 1177 } 1178 1179 /** 1180 * Start at the task above this one and go up, looking for a visible 1181 * fullscreen activity, or a translucent activity that requested the 1182 * wallpaper to be shown behind it. 1183 */ 1184 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1185 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1186 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1187 final TaskRecord task = tasks.get(taskNdx); 1188 final ArrayList<ActivityRecord> activities = task.mActivities; 1189 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1190 final ActivityRecord r = activities.get(activityNdx); 1191 1192 // Conditions for an activity to obscure the stack we're 1193 // examining: 1194 // 1. Not Finishing AND Visible AND: 1195 // 2. Either: 1196 // - Full Screen Activity OR 1197 // - On top of Home and our stack is NOT home 1198 if (!r.finishing && r.visible && (r.fullscreen || 1199 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1200 return false; 1201 } 1202 } 1203 } 1204 } 1205 1206 return true; 1207 } 1208 1209 /** 1210 * Make sure that all activities that need to be visible (that is, they 1211 * currently can be seen by the user) actually are. 1212 */ 1213 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1214 ActivityRecord top = topRunningActivityLocked(null); 1215 if (top == null) { 1216 return; 1217 } 1218 if (DEBUG_VISBILITY) Slog.v( 1219 TAG, "ensureActivitiesVisible behind " + top 1220 + " configChanges=0x" + Integer.toHexString(configChanges)); 1221 1222 if (mTranslucentActivityWaiting != top) { 1223 mUndrawnActivitiesBelowTopTranslucent.clear(); 1224 if (mTranslucentActivityWaiting != null) { 1225 // Call the callback with a timeout indication. 1226 notifyActivityDrawnLocked(null); 1227 mTranslucentActivityWaiting = null; 1228 } 1229 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1230 } 1231 1232 // If the top activity is not fullscreen, then we need to 1233 // make sure any activities under it are now visible. 1234 boolean aboveTop = true; 1235 boolean behindFullscreen = !isStackVisible(); 1236 1237 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1238 final TaskRecord task = mTaskHistory.get(taskNdx); 1239 final ArrayList<ActivityRecord> activities = task.mActivities; 1240 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1241 final ActivityRecord r = activities.get(activityNdx); 1242 if (r.finishing) { 1243 continue; 1244 } 1245 if (aboveTop && r != top) { 1246 continue; 1247 } 1248 aboveTop = false; 1249 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1250 // but must be drawn initially for the animation as though they were visible. 1251 if (!behindFullscreen || r.mLaunchTaskBehind) { 1252 if (DEBUG_VISBILITY) Slog.v( 1253 TAG, "Make visible? " + r + " finishing=" + r.finishing 1254 + " state=" + r.state); 1255 1256 // First: if this is not the current activity being started, make 1257 // sure it matches the current configuration. 1258 if (r != starting) { 1259 ensureActivityConfigurationLocked(r, 0); 1260 } 1261 1262 if (r.app == null || r.app.thread == null) { 1263 // This activity needs to be visible, but isn't even 1264 // running... get it started, but don't resume it 1265 // at this point. 1266 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1267 if (r != starting) { 1268 r.startFreezingScreenLocked(r.app, configChanges); 1269 } 1270 if (!r.visible || r.mLaunchTaskBehind) { 1271 if (DEBUG_VISBILITY) Slog.v( 1272 TAG, "Starting and making visible: " + r); 1273 setVisibile(r, true); 1274 } 1275 if (r != starting) { 1276 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1277 } 1278 1279 } else if (r.visible) { 1280 // If this activity is already visible, then there is nothing 1281 // else to do here. 1282 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1283 r.stopFreezingScreenLocked(false); 1284 try { 1285 if (r.returningOptions != null) { 1286 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1287 r.returningOptions); 1288 } 1289 } catch(RemoteException e) { 1290 } 1291 } else { 1292 // This activity is not currently visible, but is running. 1293 // Tell it to become visible. 1294 r.visible = true; 1295 if (r.state != ActivityState.RESUMED && r != starting) { 1296 // If this activity is paused, tell it 1297 // to now show its window. 1298 if (DEBUG_VISBILITY) Slog.v( 1299 TAG, "Making visible and scheduling visibility: " + r); 1300 try { 1301 if (mTranslucentActivityWaiting != null) { 1302 r.updateOptionsLocked(r.returningOptions); 1303 mUndrawnActivitiesBelowTopTranslucent.add(r); 1304 } 1305 setVisibile(r, true); 1306 r.sleeping = false; 1307 r.app.pendingUiClean = true; 1308 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1309 r.stopFreezingScreenLocked(false); 1310 } catch (Exception e) { 1311 // Just skip on any failure; we'll make it 1312 // visible when it next restarts. 1313 Slog.w(TAG, "Exception thrown making visibile: " 1314 + r.intent.getComponent(), e); 1315 } 1316 } 1317 } 1318 1319 // Aggregate current change flags. 1320 configChanges |= r.configChangeFlags; 1321 1322 if (r.fullscreen) { 1323 // At this point, nothing else needs to be shown 1324 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1325 behindFullscreen = true; 1326 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1327 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1328 behindFullscreen = true; 1329 } 1330 } else { 1331 if (DEBUG_VISBILITY) Slog.v( 1332 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1333 + " state=" + r.state 1334 + " behindFullscreen=" + behindFullscreen); 1335 // Now for any activities that aren't visible to the user, make 1336 // sure they no longer are keeping the screen frozen. 1337 if (r.visible) { 1338 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1339 try { 1340 setVisibile(r, false); 1341 switch (r.state) { 1342 case STOPPING: 1343 case STOPPED: 1344 if (r.app != null && r.app.thread != null) { 1345 if (DEBUG_VISBILITY) Slog.v( 1346 TAG, "Scheduling invisibility: " + r); 1347 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1348 } 1349 break; 1350 1351 case INITIALIZING: 1352 case RESUMED: 1353 case PAUSING: 1354 case PAUSED: 1355 // This case created for transitioning activities from 1356 // translucent to opaque {@link Activity#convertToOpaque}. 1357 if (getVisibleBehindActivity() == r) { 1358 releaseBackgroundResources(); 1359 } else { 1360 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1361 mStackSupervisor.mStoppingActivities.add(r); 1362 } 1363 mStackSupervisor.scheduleIdleLocked(); 1364 } 1365 break; 1366 1367 default: 1368 break; 1369 } 1370 } catch (Exception e) { 1371 // Just skip on any failure; we'll make it 1372 // visible when it next restarts. 1373 Slog.w(TAG, "Exception thrown making hidden: " 1374 + r.intent.getComponent(), e); 1375 } 1376 } else { 1377 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1378 } 1379 } 1380 } 1381 } 1382 1383 if (mTranslucentActivityWaiting != null && 1384 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1385 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1386 notifyActivityDrawnLocked(null); 1387 } 1388 } 1389 1390 void convertToTranslucent(ActivityRecord r) { 1391 mTranslucentActivityWaiting = r; 1392 mUndrawnActivitiesBelowTopTranslucent.clear(); 1393 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1394 } 1395 1396 /** 1397 * Called as activities below the top translucent activity are redrawn. When the last one is 1398 * redrawn notify the top activity by calling 1399 * {@link Activity#onTranslucentConversionComplete}. 1400 * 1401 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1402 * occurred and the activity will be notified immediately. 1403 */ 1404 void notifyActivityDrawnLocked(ActivityRecord r) { 1405 mActivityContainer.setDrawn(); 1406 if ((r == null) 1407 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1408 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1409 // The last undrawn activity below the top has just been drawn. If there is an 1410 // opaque activity at the top, notify it that it can become translucent safely now. 1411 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1412 mTranslucentActivityWaiting = null; 1413 mUndrawnActivitiesBelowTopTranslucent.clear(); 1414 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1415 1416 if (waitingActivity != null) { 1417 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1418 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1419 try { 1420 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1421 waitingActivity.appToken, r != null); 1422 } catch (RemoteException e) { 1423 } 1424 } 1425 } 1426 } 1427 } 1428 1429 /** If any activities below the top running one are in the INITIALIZING state and they have a 1430 * starting window displayed then remove that starting window. It is possible that the activity 1431 * in this state will never resumed in which case that starting window will be orphaned. */ 1432 void cancelInitializingActivities() { 1433 final ActivityRecord topActivity = topRunningActivityLocked(null); 1434 boolean aboveTop = true; 1435 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1436 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1437 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1438 final ActivityRecord r = activities.get(activityNdx); 1439 if (aboveTop) { 1440 if (r == topActivity) { 1441 aboveTop = false; 1442 } 1443 continue; 1444 } 1445 1446 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1447 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1448 r.mStartingWindowShown = false; 1449 mWindowManager.removeAppStartingWindow(r.appToken); 1450 } 1451 } 1452 } 1453 } 1454 1455 /** 1456 * Ensure that the top activity in the stack is resumed. 1457 * 1458 * @param prev The previously resumed activity, for when in the process 1459 * of pausing; can be null to call from elsewhere. 1460 * 1461 * @return Returns true if something is being resumed, or false if 1462 * nothing happened. 1463 */ 1464 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1465 return resumeTopActivityLocked(prev, null); 1466 } 1467 1468 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1469 if (mStackSupervisor.inResumeTopActivity) { 1470 // Don't even start recursing. 1471 return false; 1472 } 1473 1474 boolean result = false; 1475 try { 1476 // Protect against recursion. 1477 mStackSupervisor.inResumeTopActivity = true; 1478 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 1479 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 1480 mService.comeOutOfSleepIfNeededLocked(); 1481 } 1482 result = resumeTopActivityInnerLocked(prev, options); 1483 } finally { 1484 mStackSupervisor.inResumeTopActivity = false; 1485 } 1486 return result; 1487 } 1488 1489 final boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) { 1490 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1491 1492 if (!mService.mBooting && !mService.mBooted) { 1493 // Not ready yet! 1494 return false; 1495 } 1496 1497 ActivityRecord parent = mActivityContainer.mParentActivity; 1498 if ((parent != null && parent.state != ActivityState.RESUMED) || 1499 !mActivityContainer.isAttachedLocked()) { 1500 // Do not resume this stack if its parent is not resumed. 1501 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1502 return false; 1503 } 1504 1505 cancelInitializingActivities(); 1506 1507 // Find the first activity that is not finishing. 1508 ActivityRecord next = topRunningActivityLocked(null); 1509 1510 // Remember how we'll process this pause/resume situation, and ensure 1511 // that the state is reset however we wind up proceeding. 1512 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1513 mStackSupervisor.mUserLeaving = false; 1514 1515 final TaskRecord prevTask = prev != null ? prev.task : null; 1516 if (next == null) { 1517 // There are no more activities! Let's just start up the 1518 // Launcher... 1519 ActivityOptions.abort(options); 1520 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1521 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1522 // Only resume home if on home display 1523 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1524 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1525 return isOnHomeDisplay() && 1526 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1527 } 1528 1529 next.delayedResume = false; 1530 1531 // If the top activity is the resumed one, nothing to do. 1532 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1533 mStackSupervisor.allResumedActivitiesComplete()) { 1534 // Make sure we have executed any pending transitions, since there 1535 // should be nothing left to do at this point. 1536 mWindowManager.executeAppTransition(); 1537 mNoAnimActivities.clear(); 1538 ActivityOptions.abort(options); 1539 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1540 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1541 return false; 1542 } 1543 1544 final TaskRecord nextTask = next.task; 1545 if (prevTask != null && prevTask.stack == this && 1546 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1547 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1548 if (prevTask == nextTask) { 1549 prevTask.setFrontOfTask(); 1550 } else if (prevTask != topTask()) { 1551 // This task is going away but it was supposed to return to the home stack. 1552 // Now the task above it has to return to the home task instead. 1553 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1554 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1555 } else { 1556 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1557 "resumeTopActivityLocked: Launching home next"); 1558 // Only resume home if on home display 1559 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1560 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1561 return isOnHomeDisplay() && 1562 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1563 } 1564 } 1565 1566 // If we are sleeping, and there is no resumed activity, and the top 1567 // activity is paused, well that is the state we want. 1568 if (mService.isSleepingOrShuttingDown() 1569 && mLastPausedActivity == next 1570 && mStackSupervisor.allPausedActivitiesComplete()) { 1571 // Make sure we have executed any pending transitions, since there 1572 // should be nothing left to do at this point. 1573 mWindowManager.executeAppTransition(); 1574 mNoAnimActivities.clear(); 1575 ActivityOptions.abort(options); 1576 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1577 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1578 return false; 1579 } 1580 1581 // Make sure that the user who owns this activity is started. If not, 1582 // we will just leave it as is because someone should be bringing 1583 // another user's activities to the top of the stack. 1584 if (mService.mStartedUsers.get(next.userId) == null) { 1585 Slog.w(TAG, "Skipping resume of top activity " + next 1586 + ": user " + next.userId + " is stopped"); 1587 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1588 return false; 1589 } 1590 1591 // The activity may be waiting for stop, but that is no longer 1592 // appropriate for it. 1593 mStackSupervisor.mStoppingActivities.remove(next); 1594 mStackSupervisor.mGoingToSleepActivities.remove(next); 1595 next.sleeping = false; 1596 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1597 1598 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1599 1600 // If we are currently pausing an activity, then don't do anything 1601 // until that is done. 1602 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1603 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1604 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1605 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1606 return false; 1607 } 1608 1609 // Okay we are now going to start a switch, to 'next'. We may first 1610 // have to pause the current activity, but this is an important point 1611 // where we have decided to go to 'next' so keep track of that. 1612 // XXX "App Redirected" dialog is getting too many false positives 1613 // at this point, so turn off for now. 1614 if (false) { 1615 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1616 long now = SystemClock.uptimeMillis(); 1617 final boolean inTime = mLastStartedActivity.startTime != 0 1618 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1619 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1620 final int nextUid = next.info.applicationInfo.uid; 1621 if (inTime && lastUid != nextUid 1622 && lastUid != next.launchedFromUid 1623 && mService.checkPermission( 1624 android.Manifest.permission.STOP_APP_SWITCHES, 1625 -1, next.launchedFromUid) 1626 != PackageManager.PERMISSION_GRANTED) { 1627 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1628 } else { 1629 next.startTime = now; 1630 mLastStartedActivity = next; 1631 } 1632 } else { 1633 next.startTime = SystemClock.uptimeMillis(); 1634 mLastStartedActivity = next; 1635 } 1636 } 1637 1638 // We need to start pausing the current activity so the top one 1639 // can be resumed... 1640 boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0; 1641 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 1642 if (mResumedActivity != null) { 1643 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1644 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 1645 } 1646 if (pausing) { 1647 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1648 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1649 // At this point we want to put the upcoming activity's process 1650 // at the top of the LRU list, since we know we will be needing it 1651 // very soon and it would be a waste to let it get killed if it 1652 // happens to be sitting towards the end. 1653 if (next.app != null && next.app.thread != null) { 1654 mService.updateLruProcessLocked(next.app, true, null); 1655 } 1656 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1657 return true; 1658 } 1659 1660 // If the most recent activity was noHistory but was only stopped rather 1661 // than stopped+finished because the device went to sleep, we need to make 1662 // sure to finish it as we're making a new activity topmost. 1663 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1664 !mLastNoHistoryActivity.finishing) { 1665 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1666 " on new resume"); 1667 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1668 null, "no-history", false); 1669 mLastNoHistoryActivity = null; 1670 } 1671 1672 if (prev != null && prev != next) { 1673 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1674 prev.waitingVisible = true; 1675 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1676 if (DEBUG_SWITCH) Slog.v( 1677 TAG, "Resuming top, waiting visible to hide: " + prev); 1678 } else { 1679 // The next activity is already visible, so hide the previous 1680 // activity's windows right now so we can show the new one ASAP. 1681 // We only do this if the previous is finishing, which should mean 1682 // it is on top of the one being resumed so hiding it quickly 1683 // is good. Otherwise, we want to do the normal route of allowing 1684 // the resumed activity to be shown so we can decide if the 1685 // previous should actually be hidden depending on whether the 1686 // new one is found to be full-screen or not. 1687 if (prev.finishing) { 1688 mWindowManager.setAppVisibility(prev.appToken, false); 1689 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1690 + prev + ", waitingVisible=" 1691 + (prev != null ? prev.waitingVisible : null) 1692 + ", nowVisible=" + next.nowVisible); 1693 } else { 1694 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1695 + prev + ", waitingVisible=" 1696 + (prev != null ? prev.waitingVisible : null) 1697 + ", nowVisible=" + next.nowVisible); 1698 } 1699 } 1700 } 1701 1702 // Launching this app's activity, make sure the app is no longer 1703 // considered stopped. 1704 try { 1705 AppGlobals.getPackageManager().setPackageStoppedState( 1706 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1707 } catch (RemoteException e1) { 1708 } catch (IllegalArgumentException e) { 1709 Slog.w(TAG, "Failed trying to unstop package " 1710 + next.packageName + ": " + e); 1711 } 1712 1713 // We are starting up the next activity, so tell the window manager 1714 // that the previous one will be hidden soon. This way it can know 1715 // to ignore it when computing the desired screen orientation. 1716 boolean anim = true; 1717 if (prev != null) { 1718 if (prev.finishing) { 1719 if (DEBUG_TRANSITION) Slog.v(TAG, 1720 "Prepare close transition: prev=" + prev); 1721 if (mNoAnimActivities.contains(prev)) { 1722 anim = false; 1723 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1724 } else { 1725 mWindowManager.prepareAppTransition(prev.task == next.task 1726 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1727 : AppTransition.TRANSIT_TASK_CLOSE, false); 1728 } 1729 mWindowManager.setAppWillBeHidden(prev.appToken); 1730 mWindowManager.setAppVisibility(prev.appToken, false); 1731 } else { 1732 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1733 if (mNoAnimActivities.contains(next)) { 1734 anim = false; 1735 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1736 } else { 1737 mWindowManager.prepareAppTransition(prev.task == next.task 1738 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1739 : next.mLaunchTaskBehind 1740 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1741 : AppTransition.TRANSIT_TASK_OPEN, false); 1742 } 1743 } 1744 if (false) { 1745 mWindowManager.setAppWillBeHidden(prev.appToken); 1746 mWindowManager.setAppVisibility(prev.appToken, false); 1747 } 1748 } else { 1749 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1750 if (mNoAnimActivities.contains(next)) { 1751 anim = false; 1752 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1753 } else { 1754 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1755 } 1756 } 1757 1758 Bundle resumeAnimOptions = null; 1759 if (anim) { 1760 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1761 if (opts != null) { 1762 resumeAnimOptions = opts.toBundle(); 1763 } 1764 next.applyOptionsLocked(); 1765 } else { 1766 next.clearOptionsLocked(); 1767 } 1768 1769 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1770 if (next.app != null && next.app.thread != null) { 1771 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1772 1773 // This activity is now becoming visible. 1774 mWindowManager.setAppVisibility(next.appToken, true); 1775 1776 // schedule launch ticks to collect information about slow apps. 1777 next.startLaunchTickingLocked(); 1778 1779 ActivityRecord lastResumedActivity = 1780 lastStack == null ? null :lastStack.mResumedActivity; 1781 ActivityState lastState = next.state; 1782 1783 mService.updateCpuStats(); 1784 1785 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1786 next.state = ActivityState.RESUMED; 1787 mResumedActivity = next; 1788 next.task.touchActiveTime(); 1789 mService.addRecentTaskLocked(next.task); 1790 mService.updateLruProcessLocked(next.app, true, null); 1791 updateLRUListLocked(next); 1792 mService.updateOomAdjLocked(); 1793 1794 // Have the window manager re-evaluate the orientation of 1795 // the screen based on the new activity order. 1796 boolean notUpdated = true; 1797 if (mStackSupervisor.isFrontStack(this)) { 1798 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1799 mService.mConfiguration, 1800 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1801 if (config != null) { 1802 next.frozenBeforeDestroy = true; 1803 } 1804 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1805 } 1806 1807 if (notUpdated) { 1808 // The configuration update wasn't able to keep the existing 1809 // instance of the activity, and instead started a new one. 1810 // We should be all done, but let's just make sure our activity 1811 // is still at the top and schedule another run if something 1812 // weird happened. 1813 ActivityRecord nextNext = topRunningActivityLocked(null); 1814 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1815 "Activity config changed during resume: " + next 1816 + ", new next: " + nextNext); 1817 if (nextNext != next) { 1818 // Do over! 1819 mStackSupervisor.scheduleResumeTopActivities(); 1820 } 1821 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1822 mNoAnimActivities.clear(); 1823 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1824 return true; 1825 } 1826 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1827 return false; 1828 } 1829 1830 try { 1831 // Deliver all pending results. 1832 ArrayList<ResultInfo> a = next.results; 1833 if (a != null) { 1834 final int N = a.size(); 1835 if (!next.finishing && N > 0) { 1836 if (DEBUG_RESULTS) Slog.v( 1837 TAG, "Delivering results to " + next 1838 + ": " + a); 1839 next.app.thread.scheduleSendResult(next.appToken, a); 1840 } 1841 } 1842 1843 if (next.newIntents != null) { 1844 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1845 } 1846 1847 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1848 next.userId, System.identityHashCode(next), 1849 next.task.taskId, next.shortComponentName); 1850 1851 next.sleeping = false; 1852 mService.showAskCompatModeDialogLocked(next); 1853 next.app.pendingUiClean = true; 1854 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1855 next.clearOptionsLocked(); 1856 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1857 mService.isNextTransitionForward(), resumeAnimOptions); 1858 1859 mStackSupervisor.checkReadyForSleepLocked(); 1860 1861 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1862 } catch (Exception e) { 1863 // Whoops, need to restart this activity! 1864 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1865 + lastState + ": " + next); 1866 next.state = lastState; 1867 if (lastStack != null) { 1868 lastStack.mResumedActivity = lastResumedActivity; 1869 } 1870 Slog.i(TAG, "Restarting because process died: " + next); 1871 if (!next.hasBeenLaunched) { 1872 next.hasBeenLaunched = true; 1873 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1874 mStackSupervisor.isFrontStack(lastStack)) { 1875 mWindowManager.setAppStartingWindow( 1876 next.appToken, next.packageName, next.theme, 1877 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1878 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1879 next.windowFlags, null, true); 1880 } 1881 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1882 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1883 return true; 1884 } 1885 1886 // From this point on, if something goes wrong there is no way 1887 // to recover the activity. 1888 try { 1889 next.visible = true; 1890 completeResumeLocked(next); 1891 } catch (Exception e) { 1892 // If any exception gets thrown, toss away this 1893 // activity and try the next one. 1894 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1895 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1896 "resume-exception", true); 1897 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1898 return true; 1899 } 1900 next.stopped = false; 1901 1902 } else { 1903 // Whoops, need to restart this activity! 1904 if (!next.hasBeenLaunched) { 1905 next.hasBeenLaunched = true; 1906 } else { 1907 if (SHOW_APP_STARTING_PREVIEW) { 1908 mWindowManager.setAppStartingWindow( 1909 next.appToken, next.packageName, next.theme, 1910 mService.compatibilityInfoForPackageLocked( 1911 next.info.applicationInfo), 1912 next.nonLocalizedLabel, 1913 next.labelRes, next.icon, next.logo, next.windowFlags, 1914 null, true); 1915 } 1916 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1917 } 1918 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1919 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1920 } 1921 1922 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1923 return true; 1924 } 1925 1926 private void insertTaskAtTop(TaskRecord task) { 1927 // If this is being moved to the top by another activity or being launched from the home 1928 // activity, set mOnTopOfHome accordingly. 1929 if (isOnHomeDisplay()) { 1930 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1931 final boolean fromHome = lastStack.isHomeStack(); 1932 if (!isHomeStack() && (fromHome || topTask() != task)) { 1933 task.setTaskToReturnTo(fromHome 1934 ? lastStack.topTask() == null 1935 ? HOME_ACTIVITY_TYPE 1936 : lastStack.topTask().taskType 1937 : APPLICATION_ACTIVITY_TYPE); 1938 } 1939 } else { 1940 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1941 } 1942 1943 mTaskHistory.remove(task); 1944 // Now put task at top. 1945 int taskNdx = mTaskHistory.size(); 1946 if (!isCurrentProfileLocked(task.userId)) { 1947 // Put non-current user tasks below current user tasks. 1948 while (--taskNdx >= 0) { 1949 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1950 break; 1951 } 1952 } 1953 ++taskNdx; 1954 } 1955 mTaskHistory.add(taskNdx, task); 1956 updateTaskMovement(task, true); 1957 } 1958 1959 final void startActivityLocked(ActivityRecord r, boolean newTask, 1960 boolean doResume, boolean keepCurTransition, Bundle options) { 1961 TaskRecord rTask = r.task; 1962 final int taskId = rTask.taskId; 1963 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1964 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1965 // Last activity in task had been removed or ActivityManagerService is reusing task. 1966 // Insert or replace. 1967 // Might not even be in. 1968 insertTaskAtTop(rTask); 1969 mWindowManager.moveTaskToTop(taskId); 1970 } 1971 TaskRecord task = null; 1972 if (!newTask) { 1973 // If starting in an existing task, find where that is... 1974 boolean startIt = true; 1975 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1976 task = mTaskHistory.get(taskNdx); 1977 if (task.getTopActivity() == null) { 1978 // All activities in task are finishing. 1979 continue; 1980 } 1981 if (task == r.task) { 1982 // Here it is! Now, if this is not yet visible to the 1983 // user, then just add it without starting; it will 1984 // get started when the user navigates back to it. 1985 if (!startIt) { 1986 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1987 + task, new RuntimeException("here").fillInStackTrace()); 1988 task.addActivityToTop(r); 1989 r.putInHistory(); 1990 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1991 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1992 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1993 r.userId, r.info.configChanges, task.voiceSession != null, 1994 r.mLaunchTaskBehind); 1995 if (VALIDATE_TOKENS) { 1996 validateAppTokensLocked(); 1997 } 1998 ActivityOptions.abort(options); 1999 return; 2000 } 2001 break; 2002 } else if (task.numFullscreen > 0) { 2003 startIt = false; 2004 } 2005 } 2006 } 2007 2008 // Place a new activity at top of stack, so it is next to interact 2009 // with the user. 2010 2011 // If we are not placing the new activity frontmost, we do not want 2012 // to deliver the onUserLeaving callback to the actual frontmost 2013 // activity 2014 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2015 mStackSupervisor.mUserLeaving = false; 2016 if (DEBUG_USER_LEAVING) Slog.v(TAG, 2017 "startActivity() behind front, mUserLeaving=false"); 2018 } 2019 2020 task = r.task; 2021 2022 // Slot the activity into the history stack and proceed 2023 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2024 new RuntimeException("here").fillInStackTrace()); 2025 task.addActivityToTop(r); 2026 task.setFrontOfTask(); 2027 2028 r.putInHistory(); 2029 if (!isHomeStack() || numActivities() > 0) { 2030 // We want to show the starting preview window if we are 2031 // switching to a new task, or the next activity's process is 2032 // not currently running. 2033 boolean showStartingIcon = newTask; 2034 ProcessRecord proc = r.app; 2035 if (proc == null) { 2036 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2037 } 2038 if (proc == null || proc.thread == null) { 2039 showStartingIcon = true; 2040 } 2041 if (DEBUG_TRANSITION) Slog.v(TAG, 2042 "Prepare open transition: starting " + r); 2043 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2044 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2045 mNoAnimActivities.add(r); 2046 } else { 2047 mWindowManager.prepareAppTransition(newTask 2048 ? r.mLaunchTaskBehind 2049 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2050 : AppTransition.TRANSIT_TASK_OPEN 2051 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2052 mNoAnimActivities.remove(r); 2053 } 2054 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2055 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2056 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2057 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2058 boolean doShow = true; 2059 if (newTask) { 2060 // Even though this activity is starting fresh, we still need 2061 // to reset it to make sure we apply affinities to move any 2062 // existing activities from other tasks in to it. 2063 // If the caller has requested that the target task be 2064 // reset, then do so. 2065 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2066 resetTaskIfNeededLocked(r, r); 2067 doShow = topRunningNonDelayedActivityLocked(null) == r; 2068 } 2069 } else if (options != null && new ActivityOptions(options).getAnimationType() 2070 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2071 doShow = false; 2072 } 2073 if (r.mLaunchTaskBehind) { 2074 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2075 // tell WindowManager that r is visible even though it is at the back of the stack. 2076 mWindowManager.setAppVisibility(r.appToken, true); 2077 ensureActivitiesVisibleLocked(null, 0); 2078 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2079 // Figure out if we are transitioning from another activity that is 2080 // "has the same starting icon" as the next one. This allows the 2081 // window manager to keep the previous window it had previously 2082 // created, if it still had one. 2083 ActivityRecord prev = mResumedActivity; 2084 if (prev != null) { 2085 // We don't want to reuse the previous starting preview if: 2086 // (1) The current activity is in a different task. 2087 if (prev.task != r.task) { 2088 prev = null; 2089 } 2090 // (2) The current activity is already displayed. 2091 else if (prev.nowVisible) { 2092 prev = null; 2093 } 2094 } 2095 mWindowManager.setAppStartingWindow( 2096 r.appToken, r.packageName, r.theme, 2097 mService.compatibilityInfoForPackageLocked( 2098 r.info.applicationInfo), r.nonLocalizedLabel, 2099 r.labelRes, r.icon, r.logo, r.windowFlags, 2100 prev != null ? prev.appToken : null, showStartingIcon); 2101 r.mStartingWindowShown = true; 2102 } 2103 } else { 2104 // If this is the first activity, don't do any fancy animations, 2105 // because there is nothing for it to animate on top of. 2106 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2107 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2108 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2109 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2110 ActivityOptions.abort(options); 2111 options = null; 2112 } 2113 if (VALIDATE_TOKENS) { 2114 validateAppTokensLocked(); 2115 } 2116 2117 if (doResume) { 2118 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2119 } 2120 } 2121 2122 final void validateAppTokensLocked() { 2123 mValidateAppTokens.clear(); 2124 mValidateAppTokens.ensureCapacity(numActivities()); 2125 final int numTasks = mTaskHistory.size(); 2126 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2127 TaskRecord task = mTaskHistory.get(taskNdx); 2128 final ArrayList<ActivityRecord> activities = task.mActivities; 2129 if (activities.isEmpty()) { 2130 continue; 2131 } 2132 TaskGroup group = new TaskGroup(); 2133 group.taskId = task.taskId; 2134 mValidateAppTokens.add(group); 2135 final int numActivities = activities.size(); 2136 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2137 final ActivityRecord r = activities.get(activityNdx); 2138 group.tokens.add(r.appToken); 2139 } 2140 } 2141 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2142 } 2143 2144 /** 2145 * Perform a reset of the given task, if needed as part of launching it. 2146 * Returns the new HistoryRecord at the top of the task. 2147 */ 2148 /** 2149 * Helper method for #resetTaskIfNeededLocked. 2150 * We are inside of the task being reset... we'll either finish this activity, push it out 2151 * for another task, or leave it as-is. 2152 * @param task The task containing the Activity (taskTop) that might be reset. 2153 * @param forceReset 2154 * @return An ActivityOptions that needs to be processed. 2155 */ 2156 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2157 ActivityOptions topOptions = null; 2158 2159 int replyChainEnd = -1; 2160 boolean canMoveOptions = true; 2161 2162 // We only do this for activities that are not the root of the task (since if we finish 2163 // the root, we may no longer have the task!). 2164 final ArrayList<ActivityRecord> activities = task.mActivities; 2165 final int numActivities = activities.size(); 2166 final int rootActivityNdx = task.findEffectiveRootIndex(); 2167 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2168 ActivityRecord target = activities.get(i); 2169 if (target.frontOfTask) 2170 break; 2171 2172 final int flags = target.info.flags; 2173 final boolean finishOnTaskLaunch = 2174 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2175 final boolean allowTaskReparenting = 2176 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2177 final boolean clearWhenTaskReset = 2178 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2179 2180 if (!finishOnTaskLaunch 2181 && !clearWhenTaskReset 2182 && target.resultTo != null) { 2183 // If this activity is sending a reply to a previous 2184 // activity, we can't do anything with it now until 2185 // we reach the start of the reply chain. 2186 // XXX note that we are assuming the result is always 2187 // to the previous activity, which is almost always 2188 // the case but we really shouldn't count on. 2189 if (replyChainEnd < 0) { 2190 replyChainEnd = i; 2191 } 2192 } else if (!finishOnTaskLaunch 2193 && !clearWhenTaskReset 2194 && allowTaskReparenting 2195 && target.taskAffinity != null 2196 && !target.taskAffinity.equals(task.affinity)) { 2197 // If this activity has an affinity for another 2198 // task, then we need to move it out of here. We will 2199 // move it as far out of the way as possible, to the 2200 // bottom of the activity stack. This also keeps it 2201 // correctly ordered with any activities we previously 2202 // moved. 2203 final TaskRecord targetTask; 2204 final ActivityRecord bottom = 2205 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2206 mTaskHistory.get(0).mActivities.get(0) : null; 2207 if (bottom != null && target.taskAffinity != null 2208 && target.taskAffinity.equals(bottom.task.affinity)) { 2209 // If the activity currently at the bottom has the 2210 // same task affinity as the one we are moving, 2211 // then merge it into the same task. 2212 targetTask = bottom.task; 2213 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2214 + " out to bottom task " + bottom.task); 2215 } else { 2216 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2217 null, null, null, false); 2218 targetTask.affinityIntent = target.intent; 2219 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2220 + " out to new task " + target.task); 2221 } 2222 2223 final int targetTaskId = targetTask.taskId; 2224 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2225 2226 boolean noOptions = canMoveOptions; 2227 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2228 for (int srcPos = start; srcPos >= i; --srcPos) { 2229 final ActivityRecord p = activities.get(srcPos); 2230 if (p.finishing) { 2231 continue; 2232 } 2233 2234 canMoveOptions = false; 2235 if (noOptions && topOptions == null) { 2236 topOptions = p.takeOptionsLocked(); 2237 if (topOptions != null) { 2238 noOptions = false; 2239 } 2240 } 2241 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2242 + task + " adding to task=" + targetTask 2243 + " Callers=" + Debug.getCallers(4)); 2244 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2245 + " out to target's task " + target.task); 2246 p.setTask(targetTask, null); 2247 targetTask.addActivityAtBottom(p); 2248 2249 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2250 } 2251 2252 mWindowManager.moveTaskToBottom(targetTaskId); 2253 if (VALIDATE_TOKENS) { 2254 validateAppTokensLocked(); 2255 } 2256 2257 replyChainEnd = -1; 2258 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2259 // If the activity should just be removed -- either 2260 // because it asks for it, or the task should be 2261 // cleared -- then finish it and anything that is 2262 // part of its reply chain. 2263 int end; 2264 if (clearWhenTaskReset) { 2265 // In this case, we want to finish this activity 2266 // and everything above it, so be sneaky and pretend 2267 // like these are all in the reply chain. 2268 end = numActivities - 1; 2269 } else if (replyChainEnd < 0) { 2270 end = i; 2271 } else { 2272 end = replyChainEnd; 2273 } 2274 boolean noOptions = canMoveOptions; 2275 for (int srcPos = i; srcPos <= end; srcPos++) { 2276 ActivityRecord p = activities.get(srcPos); 2277 if (p.finishing) { 2278 continue; 2279 } 2280 canMoveOptions = false; 2281 if (noOptions && topOptions == null) { 2282 topOptions = p.takeOptionsLocked(); 2283 if (topOptions != null) { 2284 noOptions = false; 2285 } 2286 } 2287 if (DEBUG_TASKS) Slog.w(TAG, 2288 "resetTaskIntendedTask: calling finishActivity on " + p); 2289 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2290 end--; 2291 srcPos--; 2292 } 2293 } 2294 replyChainEnd = -1; 2295 } else { 2296 // If we were in the middle of a chain, well the 2297 // activity that started it all doesn't want anything 2298 // special, so leave it all as-is. 2299 replyChainEnd = -1; 2300 } 2301 } 2302 2303 return topOptions; 2304 } 2305 2306 /** 2307 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2308 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2309 * @param affinityTask The task we are looking for an affinity to. 2310 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2311 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2312 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2313 */ 2314 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2315 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2316 int replyChainEnd = -1; 2317 final int taskId = task.taskId; 2318 final String taskAffinity = task.affinity; 2319 2320 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2321 final int numActivities = activities.size(); 2322 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2323 2324 // Do not operate on or below the effective root Activity. 2325 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2326 ActivityRecord target = activities.get(i); 2327 if (target.frontOfTask) 2328 break; 2329 2330 final int flags = target.info.flags; 2331 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2332 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2333 2334 if (target.resultTo != null) { 2335 // If this activity is sending a reply to a previous 2336 // activity, we can't do anything with it now until 2337 // we reach the start of the reply chain. 2338 // XXX note that we are assuming the result is always 2339 // to the previous activity, which is almost always 2340 // the case but we really shouldn't count on. 2341 if (replyChainEnd < 0) { 2342 replyChainEnd = i; 2343 } 2344 } else if (topTaskIsHigher 2345 && allowTaskReparenting 2346 && taskAffinity != null 2347 && taskAffinity.equals(target.taskAffinity)) { 2348 // This activity has an affinity for our task. Either remove it if we are 2349 // clearing or move it over to our task. Note that 2350 // we currently punt on the case where we are resetting a 2351 // task that is not at the top but who has activities above 2352 // with an affinity to it... this is really not a normal 2353 // case, and we will need to later pull that task to the front 2354 // and usually at that point we will do the reset and pick 2355 // up those remaining activities. (This only happens if 2356 // someone starts an activity in a new task from an activity 2357 // in a task that is not currently on top.) 2358 if (forceReset || finishOnTaskLaunch) { 2359 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2360 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2361 for (int srcPos = start; srcPos >= i; --srcPos) { 2362 final ActivityRecord p = activities.get(srcPos); 2363 if (p.finishing) { 2364 continue; 2365 } 2366 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2367 } 2368 } else { 2369 if (taskInsertionPoint < 0) { 2370 taskInsertionPoint = task.mActivities.size(); 2371 2372 } 2373 2374 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2375 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2376 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2377 for (int srcPos = start; srcPos >= i; --srcPos) { 2378 final ActivityRecord p = activities.get(srcPos); 2379 p.setTask(task, null); 2380 task.addActivityAtIndex(taskInsertionPoint, p); 2381 2382 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2383 + " to stack at " + task, 2384 new RuntimeException("here").fillInStackTrace()); 2385 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2386 + " in to resetting task " + task); 2387 mWindowManager.setAppGroupId(p.appToken, taskId); 2388 } 2389 mWindowManager.moveTaskToTop(taskId); 2390 if (VALIDATE_TOKENS) { 2391 validateAppTokensLocked(); 2392 } 2393 2394 // Now we've moved it in to place... but what if this is 2395 // a singleTop activity and we have put it on top of another 2396 // instance of the same activity? Then we drop the instance 2397 // below so it remains singleTop. 2398 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2399 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2400 int targetNdx = taskActivities.indexOf(target); 2401 if (targetNdx > 0) { 2402 ActivityRecord p = taskActivities.get(targetNdx - 1); 2403 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2404 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2405 false); 2406 } 2407 } 2408 } 2409 } 2410 2411 replyChainEnd = -1; 2412 } 2413 } 2414 return taskInsertionPoint; 2415 } 2416 2417 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2418 ActivityRecord newActivity) { 2419 boolean forceReset = 2420 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2421 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2422 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2423 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2424 forceReset = true; 2425 } 2426 } 2427 2428 final TaskRecord task = taskTop.task; 2429 2430 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2431 * for remaining tasks. Used for later tasks to reparent to task. */ 2432 boolean taskFound = false; 2433 2434 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2435 ActivityOptions topOptions = null; 2436 2437 // Preserve the location for reparenting in the new task. 2438 int reparentInsertionPoint = -1; 2439 2440 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2441 final TaskRecord targetTask = mTaskHistory.get(i); 2442 2443 if (targetTask == task) { 2444 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2445 taskFound = true; 2446 } else { 2447 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2448 taskFound, forceReset, reparentInsertionPoint); 2449 } 2450 } 2451 2452 int taskNdx = mTaskHistory.indexOf(task); 2453 do { 2454 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2455 } while (taskTop == null && taskNdx >= 0); 2456 2457 if (topOptions != null) { 2458 // If we got some ActivityOptions from an activity on top that 2459 // was removed from the task, propagate them to the new real top. 2460 if (taskTop != null) { 2461 taskTop.updateOptionsLocked(topOptions); 2462 } else { 2463 topOptions.abort(); 2464 } 2465 } 2466 2467 return taskTop; 2468 } 2469 2470 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2471 String resultWho, int requestCode, int resultCode, Intent data) { 2472 2473 if (callingUid > 0) { 2474 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2475 data, r.getUriPermissionsLocked(), r.userId); 2476 } 2477 2478 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2479 + " : who=" + resultWho + " req=" + requestCode 2480 + " res=" + resultCode + " data=" + data); 2481 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2482 try { 2483 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2484 list.add(new ResultInfo(resultWho, requestCode, 2485 resultCode, data)); 2486 r.app.thread.scheduleSendResult(r.appToken, list); 2487 return; 2488 } catch (Exception e) { 2489 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2490 } 2491 } 2492 2493 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2494 } 2495 2496 private void adjustFocusedActivityLocked(ActivityRecord r) { 2497 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2498 ActivityRecord next = topRunningActivityLocked(null); 2499 if (next != r) { 2500 final TaskRecord task = r.task; 2501 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2502 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2503 } 2504 } 2505 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2506 if (top != null) { 2507 mService.setFocusedActivityLocked(top); 2508 } 2509 } 2510 } 2511 2512 final void stopActivityLocked(ActivityRecord r) { 2513 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2514 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2515 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2516 if (!r.finishing) { 2517 if (!mService.isSleeping()) { 2518 if (DEBUG_STATES) { 2519 Slog.d(TAG, "no-history finish of " + r); 2520 } 2521 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2522 "no-history", false); 2523 } else { 2524 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2525 + " on stop because we're just sleeping"); 2526 } 2527 } 2528 } 2529 2530 if (r.app != null && r.app.thread != null) { 2531 adjustFocusedActivityLocked(r); 2532 r.resumeKeyDispatchingLocked(); 2533 try { 2534 r.stopped = false; 2535 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2536 + " (stop requested)"); 2537 r.state = ActivityState.STOPPING; 2538 if (DEBUG_VISBILITY) Slog.v( 2539 TAG, "Stopping visible=" + r.visible + " for " + r); 2540 if (!r.visible) { 2541 mWindowManager.setAppVisibility(r.appToken, false); 2542 } 2543 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2544 if (mService.isSleepingOrShuttingDown()) { 2545 r.setSleeping(true); 2546 } 2547 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2548 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2549 } catch (Exception e) { 2550 // Maybe just ignore exceptions here... if the process 2551 // has crashed, our death notification will clean things 2552 // up. 2553 Slog.w(TAG, "Exception thrown during pause", e); 2554 // Just in case, assume it to be stopped. 2555 r.stopped = true; 2556 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2557 r.state = ActivityState.STOPPED; 2558 if (r.configDestroy) { 2559 destroyActivityLocked(r, true, "stop-except"); 2560 } 2561 } 2562 } 2563 } 2564 2565 /** 2566 * @return Returns true if the activity is being finished, false if for 2567 * some reason it is being left as-is. 2568 */ 2569 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2570 Intent resultData, String reason, boolean oomAdj) { 2571 ActivityRecord r = isInStackLocked(token); 2572 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2573 TAG, "Finishing activity token=" + token + " r=" 2574 + ", result=" + resultCode + ", data=" + resultData 2575 + ", reason=" + reason); 2576 if (r == null) { 2577 return false; 2578 } 2579 2580 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2581 return true; 2582 } 2583 2584 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2585 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2586 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2587 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2588 ActivityRecord r = activities.get(activityNdx); 2589 if (r.resultTo == self && r.requestCode == requestCode) { 2590 if ((r.resultWho == null && resultWho == null) || 2591 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2592 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2593 false); 2594 } 2595 } 2596 } 2597 } 2598 mService.updateOomAdjLocked(); 2599 } 2600 2601 final void finishTopRunningActivityLocked(ProcessRecord app) { 2602 ActivityRecord r = topRunningActivityLocked(null); 2603 if (r != null && r.app == app) { 2604 // If the top running activity is from this crashing 2605 // process, then terminate it to avoid getting in a loop. 2606 Slog.w(TAG, " Force finishing activity " 2607 + r.intent.getComponent().flattenToShortString()); 2608 int taskNdx = mTaskHistory.indexOf(r.task); 2609 int activityNdx = r.task.mActivities.indexOf(r); 2610 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2611 // Also terminate any activities below it that aren't yet 2612 // stopped, to avoid a situation where one will get 2613 // re-start our crashing activity once it gets resumed again. 2614 --activityNdx; 2615 if (activityNdx < 0) { 2616 do { 2617 --taskNdx; 2618 if (taskNdx < 0) { 2619 break; 2620 } 2621 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2622 } while (activityNdx < 0); 2623 } 2624 if (activityNdx >= 0) { 2625 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2626 if (r.state == ActivityState.RESUMED 2627 || r.state == ActivityState.PAUSING 2628 || r.state == ActivityState.PAUSED) { 2629 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2630 Slog.w(TAG, " Force finishing activity " 2631 + r.intent.getComponent().flattenToShortString()); 2632 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2633 } 2634 } 2635 } 2636 } 2637 } 2638 2639 final void finishVoiceTask(IVoiceInteractionSession session) { 2640 IBinder sessionBinder = session.asBinder(); 2641 boolean didOne = false; 2642 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2643 TaskRecord tr = mTaskHistory.get(taskNdx); 2644 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2645 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2646 ActivityRecord r = tr.mActivities.get(activityNdx); 2647 if (!r.finishing) { 2648 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2649 false); 2650 didOne = true; 2651 } 2652 } 2653 } 2654 } 2655 if (didOne) { 2656 mService.updateOomAdjLocked(); 2657 } 2658 } 2659 2660 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2661 ArrayList<ActivityRecord> activities = r.task.mActivities; 2662 for (int index = activities.indexOf(r); index >= 0; --index) { 2663 ActivityRecord cur = activities.get(index); 2664 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2665 break; 2666 } 2667 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2668 } 2669 return true; 2670 } 2671 2672 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2673 // send the result 2674 ActivityRecord resultTo = r.resultTo; 2675 if (resultTo != null) { 2676 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2677 + " who=" + r.resultWho + " req=" + r.requestCode 2678 + " res=" + resultCode + " data=" + resultData); 2679 if (resultTo.userId != r.userId) { 2680 if (resultData != null) { 2681 resultData.setContentUserHint(r.userId); 2682 } 2683 } 2684 if (r.info.applicationInfo.uid > 0) { 2685 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2686 resultTo.packageName, resultData, 2687 resultTo.getUriPermissionsLocked(), resultTo.userId); 2688 } 2689 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2690 resultData); 2691 r.resultTo = null; 2692 } 2693 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2694 2695 // Make sure this HistoryRecord is not holding on to other resources, 2696 // because clients have remote IPC references to this object so we 2697 // can't assume that will go away and want to avoid circular IPC refs. 2698 r.results = null; 2699 r.pendingResults = null; 2700 r.newIntents = null; 2701 r.icicle = null; 2702 } 2703 2704 /** 2705 * @return Returns true if this activity has been removed from the history 2706 * list, or false if it is still in the list and will be removed later. 2707 */ 2708 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2709 String reason, boolean oomAdj) { 2710 if (r.finishing) { 2711 Slog.w(TAG, "Duplicate finish request for " + r); 2712 return false; 2713 } 2714 2715 r.makeFinishing(); 2716 final TaskRecord task = r.task; 2717 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2718 r.userId, System.identityHashCode(r), 2719 task.taskId, r.shortComponentName, reason); 2720 final ArrayList<ActivityRecord> activities = task.mActivities; 2721 final int index = activities.indexOf(r); 2722 if (index < (activities.size() - 1)) { 2723 task.setFrontOfTask(); 2724 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2725 // If the caller asked that this activity (and all above it) 2726 // be cleared when the task is reset, don't lose that information, 2727 // but propagate it up to the next activity. 2728 ActivityRecord next = activities.get(index+1); 2729 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2730 } 2731 } 2732 2733 r.pauseKeyDispatchingLocked(); 2734 2735 adjustFocusedActivityLocked(r); 2736 2737 finishActivityResultsLocked(r, resultCode, resultData); 2738 2739 if (mResumedActivity == r) { 2740 boolean endTask = index <= 0; 2741 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2742 "Prepare close transition: finishing " + r); 2743 mWindowManager.prepareAppTransition(endTask 2744 ? AppTransition.TRANSIT_TASK_CLOSE 2745 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2746 2747 // Tell window manager to prepare for this one to be removed. 2748 mWindowManager.setAppVisibility(r.appToken, false); 2749 2750 if (mPausingActivity == null) { 2751 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2752 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2753 startPausingLocked(false, false, false, false); 2754 } 2755 2756 if (endTask) { 2757 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2758 } 2759 } else if (r.state != ActivityState.PAUSING) { 2760 // If the activity is PAUSING, we will complete the finish once 2761 // it is done pausing; else we can just directly finish it here. 2762 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2763 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2764 } else { 2765 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2766 } 2767 2768 return false; 2769 } 2770 2771 static final int FINISH_IMMEDIATELY = 0; 2772 static final int FINISH_AFTER_PAUSE = 1; 2773 static final int FINISH_AFTER_VISIBLE = 2; 2774 2775 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2776 // First things first: if this activity is currently visible, 2777 // and the resumed activity is not yet visible, then hold off on 2778 // finishing until the resumed one becomes visible. 2779 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2780 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2781 mStackSupervisor.mStoppingActivities.add(r); 2782 if (mStackSupervisor.mStoppingActivities.size() > 3 2783 || r.frontOfTask && mTaskHistory.size() <= 1) { 2784 // If we already have a few activities waiting to stop, 2785 // then give up on things going idle and start clearing 2786 // them out. Or if r is the last of activity of the last task the stack 2787 // will be empty and must be cleared immediately. 2788 mStackSupervisor.scheduleIdleLocked(); 2789 } else { 2790 mStackSupervisor.checkReadyForSleepLocked(); 2791 } 2792 } 2793 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2794 + " (finish requested)"); 2795 r.state = ActivityState.STOPPING; 2796 if (oomAdj) { 2797 mService.updateOomAdjLocked(); 2798 } 2799 return r; 2800 } 2801 2802 // make sure the record is cleaned out of other places. 2803 mStackSupervisor.mStoppingActivities.remove(r); 2804 mStackSupervisor.mGoingToSleepActivities.remove(r); 2805 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2806 if (mResumedActivity == r) { 2807 mResumedActivity = null; 2808 } 2809 final ActivityState prevState = r.state; 2810 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2811 r.state = ActivityState.FINISHING; 2812 2813 if (mode == FINISH_IMMEDIATELY 2814 || prevState == ActivityState.STOPPED 2815 || prevState == ActivityState.INITIALIZING) { 2816 // If this activity is already stopped, we can just finish 2817 // it right now. 2818 r.makeFinishing(); 2819 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2820 if (activityRemoved) { 2821 mStackSupervisor.resumeTopActivitiesLocked(); 2822 } 2823 if (DEBUG_CONTAINERS) Slog.d(TAG, 2824 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2825 " destroy returned removed=" + activityRemoved); 2826 return activityRemoved ? null : r; 2827 } 2828 2829 // Need to go through the full pause cycle to get this 2830 // activity into the stopped state and then finish it. 2831 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2832 mStackSupervisor.mFinishingActivities.add(r); 2833 r.resumeKeyDispatchingLocked(); 2834 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2835 return r; 2836 } 2837 2838 void finishAllActivitiesLocked(boolean immediately) { 2839 boolean noActivitiesInStack = true; 2840 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2841 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2842 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2843 final ActivityRecord r = activities.get(activityNdx); 2844 noActivitiesInStack = false; 2845 if (r.finishing && !immediately) { 2846 continue; 2847 } 2848 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2849 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2850 } 2851 } 2852 if (noActivitiesInStack) { 2853 mActivityContainer.onTaskListEmptyLocked(); 2854 } 2855 } 2856 2857 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2858 // Basic case: for simple app-centric recents, we need to recreate 2859 // the task if the affinity has changed. 2860 if (srec == null || srec.task.affinity == null || 2861 !srec.task.affinity.equals(destAffinity)) { 2862 return true; 2863 } 2864 // Document-centric case: an app may be split in to multiple documents; 2865 // they need to re-create their task if this current activity is the root 2866 // of a document, unless simply finishing it will return them to the the 2867 // correct app behind. 2868 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 2869 && srec.task.getBaseIntent().isDocument()) { 2870 // Okay, this activity is at the root of its task. What to do, what to do... 2871 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2872 // Finishing won't return to an application, so we need to recreate. 2873 return true; 2874 } 2875 // We now need to get the task below it to determine what to do. 2876 int taskIdx = mTaskHistory.indexOf(srec.task); 2877 if (taskIdx <= 0) { 2878 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2879 return false; 2880 } 2881 if (taskIdx == 0) { 2882 // At the bottom of the stack, nothing to go back to. 2883 return true; 2884 } 2885 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2886 if (!srec.task.affinity.equals(prevTask.affinity)) { 2887 // These are different apps, so need to recreate. 2888 return true; 2889 } 2890 } 2891 return false; 2892 } 2893 2894 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2895 Intent resultData) { 2896 final ActivityRecord srec = ActivityRecord.forToken(token); 2897 final TaskRecord task = srec.task; 2898 final ArrayList<ActivityRecord> activities = task.mActivities; 2899 final int start = activities.indexOf(srec); 2900 if (!mTaskHistory.contains(task) || (start < 0)) { 2901 return false; 2902 } 2903 int finishTo = start - 1; 2904 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2905 boolean foundParentInTask = false; 2906 final ComponentName dest = destIntent.getComponent(); 2907 if (start > 0 && dest != null) { 2908 for (int i = finishTo; i >= 0; i--) { 2909 ActivityRecord r = activities.get(i); 2910 if (r.info.packageName.equals(dest.getPackageName()) && 2911 r.info.name.equals(dest.getClassName())) { 2912 finishTo = i; 2913 parent = r; 2914 foundParentInTask = true; 2915 break; 2916 } 2917 } 2918 } 2919 2920 IActivityController controller = mService.mController; 2921 if (controller != null) { 2922 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2923 if (next != null) { 2924 // ask watcher if this is allowed 2925 boolean resumeOK = true; 2926 try { 2927 resumeOK = controller.activityResuming(next.packageName); 2928 } catch (RemoteException e) { 2929 mService.mController = null; 2930 Watchdog.getInstance().setActivityController(null); 2931 } 2932 2933 if (!resumeOK) { 2934 return false; 2935 } 2936 } 2937 } 2938 final long origId = Binder.clearCallingIdentity(); 2939 for (int i = start; i > finishTo; i--) { 2940 ActivityRecord r = activities.get(i); 2941 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2942 // Only return the supplied result for the first activity finished 2943 resultCode = Activity.RESULT_CANCELED; 2944 resultData = null; 2945 } 2946 2947 if (parent != null && foundParentInTask) { 2948 final int parentLaunchMode = parent.info.launchMode; 2949 final int destIntentFlags = destIntent.getFlags(); 2950 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2951 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2952 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2953 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2954 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 2955 srec.packageName); 2956 } else { 2957 try { 2958 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2959 destIntent.getComponent(), 0, srec.userId); 2960 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2961 null, aInfo, null, null, parent.appToken, null, 2962 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2963 -1, parent.launchedFromUid, 0, null, true, null, null, null); 2964 foundParentInTask = res == ActivityManager.START_SUCCESS; 2965 } catch (RemoteException e) { 2966 foundParentInTask = false; 2967 } 2968 requestFinishActivityLocked(parent.appToken, resultCode, 2969 resultData, "navigate-up", true); 2970 } 2971 } 2972 Binder.restoreCallingIdentity(origId); 2973 return foundParentInTask; 2974 } 2975 /** 2976 * Perform the common clean-up of an activity record. This is called both 2977 * as part of destroyActivityLocked() (when destroying the client-side 2978 * representation) and cleaning things up as a result of its hosting 2979 * processing going away, in which case there is no remaining client-side 2980 * state to destroy so only the cleanup here is needed. 2981 */ 2982 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2983 boolean setState) { 2984 if (mResumedActivity == r) { 2985 mResumedActivity = null; 2986 } 2987 if (mPausingActivity == r) { 2988 mPausingActivity = null; 2989 } 2990 mService.clearFocusedActivity(r); 2991 2992 r.configDestroy = false; 2993 r.frozenBeforeDestroy = false; 2994 2995 if (setState) { 2996 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2997 r.state = ActivityState.DESTROYED; 2998 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2999 r.app = null; 3000 } 3001 3002 // Make sure this record is no longer in the pending finishes list. 3003 // This could happen, for example, if we are trimming activities 3004 // down to the max limit while they are still waiting to finish. 3005 mStackSupervisor.mFinishingActivities.remove(r); 3006 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3007 3008 // Remove any pending results. 3009 if (r.finishing && r.pendingResults != null) { 3010 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3011 PendingIntentRecord rec = apr.get(); 3012 if (rec != null) { 3013 mService.cancelIntentSenderLocked(rec, false); 3014 } 3015 } 3016 r.pendingResults = null; 3017 } 3018 3019 if (cleanServices) { 3020 cleanUpActivityServicesLocked(r); 3021 } 3022 3023 // Get rid of any pending idle timeouts. 3024 removeTimeoutsForActivityLocked(r); 3025 if (getVisibleBehindActivity() == r) { 3026 mStackSupervisor.requestVisibleBehindLocked(r, false); 3027 } 3028 } 3029 3030 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3031 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3032 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3033 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3034 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3035 r.finishLaunchTickingLocked(); 3036 } 3037 3038 private void removeActivityFromHistoryLocked(ActivityRecord r) { 3039 mStackSupervisor.removeChildActivityContainers(r); 3040 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3041 r.makeFinishing(); 3042 if (DEBUG_ADD_REMOVE) { 3043 RuntimeException here = new RuntimeException("here"); 3044 here.fillInStackTrace(); 3045 Slog.i(TAG, "Removing activity " + r + " from stack"); 3046 } 3047 r.takeFromHistory(); 3048 removeTimeoutsForActivityLocked(r); 3049 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3050 r.state = ActivityState.DESTROYED; 3051 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3052 r.app = null; 3053 mWindowManager.removeAppToken(r.appToken); 3054 if (VALIDATE_TOKENS) { 3055 validateAppTokensLocked(); 3056 } 3057 final TaskRecord task = r.task; 3058 if (task != null && task.removeActivity(r)) { 3059 if (DEBUG_STACK) Slog.i(TAG, 3060 "removeActivityFromHistoryLocked: last activity removed from " + this); 3061 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3062 task.isOverHomeStack()) { 3063 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3064 } 3065 removeTask(task); 3066 } 3067 cleanUpActivityServicesLocked(r); 3068 r.removeUriPermissionsLocked(); 3069 } 3070 3071 /** 3072 * Perform clean-up of service connections in an activity record. 3073 */ 3074 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3075 // Throw away any services that have been bound by this activity. 3076 if (r.connections != null) { 3077 Iterator<ConnectionRecord> it = r.connections.iterator(); 3078 while (it.hasNext()) { 3079 ConnectionRecord c = it.next(); 3080 mService.mServices.removeConnectionLocked(c, null, r); 3081 } 3082 r.connections = null; 3083 } 3084 } 3085 3086 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3087 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3088 msg.obj = new ScheduleDestroyArgs(owner, reason); 3089 mHandler.sendMessage(msg); 3090 } 3091 3092 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3093 boolean lastIsOpaque = false; 3094 boolean activityRemoved = false; 3095 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3096 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3097 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3098 final ActivityRecord r = activities.get(activityNdx); 3099 if (r.finishing) { 3100 continue; 3101 } 3102 if (r.fullscreen) { 3103 lastIsOpaque = true; 3104 } 3105 if (owner != null && r.app != owner) { 3106 continue; 3107 } 3108 if (!lastIsOpaque) { 3109 continue; 3110 } 3111 if (r.isDestroyable()) { 3112 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3113 + " resumed=" + mResumedActivity 3114 + " pausing=" + mPausingActivity + " for reason " + reason); 3115 if (destroyActivityLocked(r, true, reason)) { 3116 activityRemoved = true; 3117 } 3118 } 3119 } 3120 } 3121 if (activityRemoved) { 3122 mStackSupervisor.resumeTopActivitiesLocked(); 3123 } 3124 } 3125 3126 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3127 if (r.isDestroyable()) { 3128 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3129 + " resumed=" + mResumedActivity 3130 + " pausing=" + mPausingActivity + " for reason " + reason); 3131 return destroyActivityLocked(r, true, reason); 3132 } 3133 return false; 3134 } 3135 3136 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3137 String reason) { 3138 // Iterate over tasks starting at the back (oldest) first. 3139 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3140 int maxTasks = tasks.size() / 4; 3141 if (maxTasks < 1) { 3142 maxTasks = 1; 3143 } 3144 int numReleased = 0; 3145 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3146 final TaskRecord task = mTaskHistory.get(taskNdx); 3147 if (!tasks.contains(task)) { 3148 continue; 3149 } 3150 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3151 int curNum = 0; 3152 final ArrayList<ActivityRecord> activities = task.mActivities; 3153 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3154 final ActivityRecord activity = activities.get(actNdx); 3155 if (activity.app == app && activity.isDestroyable()) { 3156 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3157 + " in state " + activity.state + " resumed=" + mResumedActivity 3158 + " pausing=" + mPausingActivity + " for reason " + reason); 3159 destroyActivityLocked(activity, true, reason); 3160 if (activities.get(actNdx) != activity) { 3161 // Was removed from list, back up so we don't miss the next one. 3162 actNdx--; 3163 } 3164 curNum++; 3165 } 3166 } 3167 if (curNum > 0) { 3168 numReleased += curNum; 3169 maxTasks--; 3170 if (mTaskHistory.get(taskNdx) != task) { 3171 // The entire task got removed, back up so we don't miss the next one. 3172 taskNdx--; 3173 } 3174 } 3175 } 3176 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3177 return numReleased; 3178 } 3179 3180 /** 3181 * Destroy the current CLIENT SIDE instance of an activity. This may be 3182 * called both when actually finishing an activity, or when performing 3183 * a configuration switch where we destroy the current client-side object 3184 * but then create a new client-side object for this same HistoryRecord. 3185 */ 3186 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3187 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3188 TAG, "Removing activity from " + reason + ": token=" + r 3189 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3190 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3191 r.userId, System.identityHashCode(r), 3192 r.task.taskId, r.shortComponentName, reason); 3193 3194 boolean removedFromHistory = false; 3195 3196 cleanUpActivityLocked(r, false, false); 3197 3198 final boolean hadApp = r.app != null; 3199 3200 if (hadApp) { 3201 if (removeFromApp) { 3202 r.app.activities.remove(r); 3203 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3204 mService.mHeavyWeightProcess = null; 3205 mService.mHandler.sendEmptyMessage( 3206 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3207 } 3208 if (r.app.activities.isEmpty()) { 3209 // Update any services we are bound to that might care about whether 3210 // their client may have activities. 3211 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3212 // No longer have activities, so update LRU list and oom adj. 3213 mService.updateLruProcessLocked(r.app, false, null); 3214 mService.updateOomAdjLocked(); 3215 } 3216 } 3217 3218 boolean skipDestroy = false; 3219 3220 try { 3221 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3222 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3223 r.configChangeFlags); 3224 } catch (Exception e) { 3225 // We can just ignore exceptions here... if the process 3226 // has crashed, our death notification will clean things 3227 // up. 3228 //Slog.w(TAG, "Exception thrown during finish", e); 3229 if (r.finishing) { 3230 removeActivityFromHistoryLocked(r); 3231 removedFromHistory = true; 3232 skipDestroy = true; 3233 } 3234 } 3235 3236 r.nowVisible = false; 3237 3238 // If the activity is finishing, we need to wait on removing it 3239 // from the list to give it a chance to do its cleanup. During 3240 // that time it may make calls back with its token so we need to 3241 // be able to find it on the list and so we don't want to remove 3242 // it from the list yet. Otherwise, we can just immediately put 3243 // it in the destroyed state since we are not removing it from the 3244 // list. 3245 if (r.finishing && !skipDestroy) { 3246 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3247 + " (destroy requested)"); 3248 r.state = ActivityState.DESTROYING; 3249 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3250 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3251 } else { 3252 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3253 r.state = ActivityState.DESTROYED; 3254 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3255 r.app = null; 3256 } 3257 } else { 3258 // remove this record from the history. 3259 if (r.finishing) { 3260 removeActivityFromHistoryLocked(r); 3261 removedFromHistory = true; 3262 } else { 3263 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3264 r.state = ActivityState.DESTROYED; 3265 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3266 r.app = null; 3267 } 3268 } 3269 3270 r.configChangeFlags = 0; 3271 3272 if (!mLRUActivities.remove(r) && hadApp) { 3273 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3274 } 3275 3276 return removedFromHistory; 3277 } 3278 3279 final void activityDestroyedLocked(IBinder token) { 3280 final long origId = Binder.clearCallingIdentity(); 3281 try { 3282 ActivityRecord r = ActivityRecord.forToken(token); 3283 if (r != null) { 3284 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3285 } 3286 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3287 3288 if (isInStackLocked(token) != null) { 3289 if (r.state == ActivityState.DESTROYING) { 3290 cleanUpActivityLocked(r, true, false); 3291 removeActivityFromHistoryLocked(r); 3292 } 3293 } 3294 mStackSupervisor.resumeTopActivitiesLocked(); 3295 } finally { 3296 Binder.restoreCallingIdentity(origId); 3297 } 3298 } 3299 3300 void releaseBackgroundResources() { 3301 if (hasVisibleBehindActivity() && 3302 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3303 final ActivityRecord r = getVisibleBehindActivity(); 3304 if (r == topRunningActivityLocked(null)) { 3305 // Don't release the top activity if it has requested to run behind the next 3306 // activity. 3307 return; 3308 } 3309 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3310 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3311 " thread=" + r.app.thread); 3312 if (r != null && r.app != null && r.app.thread != null) { 3313 try { 3314 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3315 } catch (RemoteException e) { 3316 } 3317 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3318 } else { 3319 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3320 backgroundResourcesReleased(r.appToken); 3321 } 3322 } 3323 } 3324 3325 final void backgroundResourcesReleased(IBinder token) { 3326 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3327 final ActivityRecord r = getVisibleBehindActivity(); 3328 if (r != null) { 3329 mStackSupervisor.mStoppingActivities.add(r); 3330 setVisibleBehindActivity(null); 3331 } 3332 mStackSupervisor.resumeTopActivitiesLocked(); 3333 } 3334 3335 boolean hasVisibleBehindActivity() { 3336 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3337 } 3338 3339 void setVisibleBehindActivity(ActivityRecord r) { 3340 if (isAttached()) { 3341 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3342 } 3343 } 3344 3345 ActivityRecord getVisibleBehindActivity() { 3346 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3347 } 3348 3349 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3350 ProcessRecord app, String listName) { 3351 int i = list.size(); 3352 if (DEBUG_CLEANUP) Slog.v( 3353 TAG, "Removing app " + app + " from list " + listName 3354 + " with " + i + " entries"); 3355 while (i > 0) { 3356 i--; 3357 ActivityRecord r = list.get(i); 3358 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3359 if (r.app == app) { 3360 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3361 list.remove(i); 3362 removeTimeoutsForActivityLocked(r); 3363 } 3364 } 3365 } 3366 3367 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3368 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3369 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3370 "mStoppingActivities"); 3371 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3372 "mGoingToSleepActivities"); 3373 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3374 "mWaitingVisibleActivities"); 3375 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3376 "mFinishingActivities"); 3377 3378 boolean hasVisibleActivities = false; 3379 3380 // Clean out the history list. 3381 int i = numActivities(); 3382 if (DEBUG_CLEANUP) Slog.v( 3383 TAG, "Removing app " + app + " from history with " + i + " entries"); 3384 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3385 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3386 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3387 final ActivityRecord r = activities.get(activityNdx); 3388 --i; 3389 if (DEBUG_CLEANUP) Slog.v( 3390 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3391 if (r.app == app) { 3392 boolean remove; 3393 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3394 // Don't currently have state for the activity, or 3395 // it is finishing -- always remove it. 3396 remove = true; 3397 } else if (r.launchCount > 2 && 3398 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3399 // We have launched this activity too many times since it was 3400 // able to run, so give up and remove it. 3401 remove = true; 3402 } else { 3403 // The process may be gone, but the activity lives on! 3404 remove = false; 3405 } 3406 if (remove) { 3407 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3408 RuntimeException here = new RuntimeException("here"); 3409 here.fillInStackTrace(); 3410 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3411 + ": haveState=" + r.haveState 3412 + " stateNotNeeded=" + r.stateNotNeeded 3413 + " finishing=" + r.finishing 3414 + " state=" + r.state, here); 3415 } 3416 if (!r.finishing) { 3417 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3418 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3419 r.userId, System.identityHashCode(r), 3420 r.task.taskId, r.shortComponentName, 3421 "proc died without state saved"); 3422 if (r.state == ActivityState.RESUMED) { 3423 mService.updateUsageStats(r, false); 3424 } 3425 } 3426 removeActivityFromHistoryLocked(r); 3427 3428 } else { 3429 // We have the current state for this activity, so 3430 // it can be restarted later when needed. 3431 if (localLOGV) Slog.v( 3432 TAG, "Keeping entry, setting app to null"); 3433 if (r.visible) { 3434 hasVisibleActivities = true; 3435 } 3436 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3437 + r); 3438 r.app = null; 3439 r.nowVisible = false; 3440 if (!r.haveState) { 3441 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3442 "App died, clearing saved state of " + r); 3443 r.icicle = null; 3444 } 3445 } 3446 3447 cleanUpActivityLocked(r, true, true); 3448 } 3449 } 3450 } 3451 3452 return hasVisibleActivities; 3453 } 3454 3455 final void updateTransitLocked(int transit, Bundle options) { 3456 if (options != null) { 3457 ActivityRecord r = topRunningActivityLocked(null); 3458 if (r != null && r.state != ActivityState.RESUMED) { 3459 r.updateOptionsLocked(options); 3460 } else { 3461 ActivityOptions.abort(options); 3462 } 3463 } 3464 mWindowManager.prepareAppTransition(transit, false); 3465 } 3466 3467 void updateTaskMovement(TaskRecord task, boolean toFront) { 3468 if (task.isPersistable) { 3469 task.mLastTimeMoved = System.currentTimeMillis(); 3470 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3471 // recently will be most negative, tasks sent to the bottom before that will be less 3472 // negative. Similarly for recent tasks moved to the top which will be most positive. 3473 if (!toFront) { 3474 task.mLastTimeMoved *= -1; 3475 } 3476 } 3477 } 3478 3479 void moveHomeStackTaskToTop(int homeStackTaskType) { 3480 final int top = mTaskHistory.size() - 1; 3481 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3482 final TaskRecord task = mTaskHistory.get(taskNdx); 3483 if (task.taskType == homeStackTaskType) { 3484 if (DEBUG_TASKS || DEBUG_STACK) 3485 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3486 mTaskHistory.remove(taskNdx); 3487 mTaskHistory.add(top, task); 3488 updateTaskMovement(task, true); 3489 mWindowManager.moveTaskToTop(task.taskId); 3490 return; 3491 } 3492 } 3493 } 3494 3495 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3496 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3497 3498 final int numTasks = mTaskHistory.size(); 3499 final int index = mTaskHistory.indexOf(tr); 3500 if (numTasks == 0 || index < 0) { 3501 // nothing to do! 3502 if (reason != null && 3503 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3504 ActivityOptions.abort(options); 3505 } else { 3506 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3507 } 3508 return; 3509 } 3510 3511 moveToFront(); 3512 3513 // Shift all activities with this task up to the top 3514 // of the stack, keeping them in the same internal order. 3515 insertTaskAtTop(tr); 3516 3517 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3518 if (reason != null && 3519 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3520 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3521 ActivityRecord r = topRunningActivityLocked(null); 3522 if (r != null) { 3523 mNoAnimActivities.add(r); 3524 } 3525 ActivityOptions.abort(options); 3526 } else { 3527 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3528 } 3529 3530 mWindowManager.moveTaskToTop(tr.taskId); 3531 3532 mStackSupervisor.resumeTopActivitiesLocked(); 3533 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3534 3535 if (VALIDATE_TOKENS) { 3536 validateAppTokensLocked(); 3537 } 3538 } 3539 3540 /** 3541 * Worker method for rearranging history stack. Implements the function of moving all 3542 * activities for a specific task (gathering them if disjoint) into a single group at the 3543 * bottom of the stack. 3544 * 3545 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3546 * to premeptively cancel the move. 3547 * 3548 * @param taskId The taskId to collect and move to the bottom. 3549 * @return Returns true if the move completed, false if not. 3550 */ 3551 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3552 final TaskRecord tr = taskForIdLocked(taskId); 3553 if (tr == null) { 3554 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3555 return false; 3556 } 3557 3558 Slog.i(TAG, "moveTaskToBack: " + tr); 3559 3560 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3561 3562 // If we have a watcher, preflight the move before committing to it. First check 3563 // for *other* available tasks, but if none are available, then try again allowing the 3564 // current task to be selected. 3565 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3566 ActivityRecord next = topRunningActivityLocked(null, taskId); 3567 if (next == null) { 3568 next = topRunningActivityLocked(null, 0); 3569 } 3570 if (next != null) { 3571 // ask watcher if this is allowed 3572 boolean moveOK = true; 3573 try { 3574 moveOK = mService.mController.activityResuming(next.packageName); 3575 } catch (RemoteException e) { 3576 mService.mController = null; 3577 Watchdog.getInstance().setActivityController(null); 3578 } 3579 if (!moveOK) { 3580 return false; 3581 } 3582 } 3583 } 3584 3585 if (DEBUG_TRANSITION) Slog.v(TAG, 3586 "Prepare to back transition: task=" + taskId); 3587 3588 mTaskHistory.remove(tr); 3589 mTaskHistory.add(0, tr); 3590 updateTaskMovement(tr, false); 3591 3592 // There is an assumption that moving a task to the back moves it behind the home activity. 3593 // We make sure here that some activity in the stack will launch home. 3594 int numTasks = mTaskHistory.size(); 3595 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3596 final TaskRecord task = mTaskHistory.get(taskNdx); 3597 if (task.isOverHomeStack()) { 3598 break; 3599 } 3600 if (taskNdx == 1) { 3601 // Set the last task before tr to go to home. 3602 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3603 } 3604 } 3605 3606 if (reason != null && 3607 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3608 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3609 ActivityRecord r = topRunningActivityLocked(null); 3610 if (r != null) { 3611 mNoAnimActivities.add(r); 3612 } 3613 } else { 3614 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3615 } 3616 mWindowManager.moveTaskToBottom(taskId); 3617 3618 if (VALIDATE_TOKENS) { 3619 validateAppTokensLocked(); 3620 } 3621 3622 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3623 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3624 if (!mService.mBooting && !mService.mBooted) { 3625 // Not ready yet! 3626 return false; 3627 } 3628 final int taskToReturnTo = tr.getTaskToReturnTo(); 3629 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3630 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3631 } 3632 3633 mStackSupervisor.resumeTopActivitiesLocked(); 3634 return true; 3635 } 3636 3637 static final void logStartActivity(int tag, ActivityRecord r, 3638 TaskRecord task) { 3639 final Uri data = r.intent.getData(); 3640 final String strData = data != null ? data.toSafeString() : null; 3641 3642 EventLog.writeEvent(tag, 3643 r.userId, System.identityHashCode(r), task.taskId, 3644 r.shortComponentName, r.intent.getAction(), 3645 r.intent.getType(), strData, r.intent.getFlags()); 3646 } 3647 3648 /** 3649 * Make sure the given activity matches the current configuration. Returns 3650 * false if the activity had to be destroyed. Returns true if the 3651 * configuration is the same, or the activity will remain running as-is 3652 * for whatever reason. Ensures the HistoryRecord is updated with the 3653 * correct configuration and all other bookkeeping is handled. 3654 */ 3655 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3656 int globalChanges) { 3657 if (mConfigWillChange) { 3658 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3659 "Skipping config check (will change): " + r); 3660 return true; 3661 } 3662 3663 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3664 "Ensuring correct configuration: " + r); 3665 3666 // Short circuit: if the two configurations are the exact same 3667 // object (the common case), then there is nothing to do. 3668 Configuration newConfig = mService.mConfiguration; 3669 if (r.configuration == newConfig && !r.forceNewConfig) { 3670 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3671 "Configuration unchanged in " + r); 3672 return true; 3673 } 3674 3675 // We don't worry about activities that are finishing. 3676 if (r.finishing) { 3677 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3678 "Configuration doesn't matter in finishing " + r); 3679 r.stopFreezingScreenLocked(false); 3680 return true; 3681 } 3682 3683 // Okay we now are going to make this activity have the new config. 3684 // But then we need to figure out how it needs to deal with that. 3685 Configuration oldConfig = r.configuration; 3686 r.configuration = newConfig; 3687 3688 // Determine what has changed. May be nothing, if this is a config 3689 // that has come back from the app after going idle. In that case 3690 // we just want to leave the official config object now in the 3691 // activity and do nothing else. 3692 final int changes = oldConfig.diff(newConfig); 3693 if (changes == 0 && !r.forceNewConfig) { 3694 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3695 "Configuration no differences in " + r); 3696 return true; 3697 } 3698 3699 // If the activity isn't currently running, just leave the new 3700 // configuration and it will pick that up next time it starts. 3701 if (r.app == null || r.app.thread == null) { 3702 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3703 "Configuration doesn't matter not running " + r); 3704 r.stopFreezingScreenLocked(false); 3705 r.forceNewConfig = false; 3706 return true; 3707 } 3708 3709 // Figure out how to handle the changes between the configurations. 3710 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3711 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3712 + Integer.toHexString(changes) + ", handles=0x" 3713 + Integer.toHexString(r.info.getRealConfigChanged()) 3714 + ", newConfig=" + newConfig); 3715 } 3716 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3717 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3718 r.configChangeFlags |= changes; 3719 r.startFreezingScreenLocked(r.app, globalChanges); 3720 r.forceNewConfig = false; 3721 if (r.app == null || r.app.thread == null) { 3722 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3723 "Config is destroying non-running " + r); 3724 destroyActivityLocked(r, true, "config"); 3725 } else if (r.state == ActivityState.PAUSING) { 3726 // A little annoying: we are waiting for this activity to 3727 // finish pausing. Let's not do anything now, but just 3728 // flag that it needs to be restarted when done pausing. 3729 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3730 "Config is skipping already pausing " + r); 3731 r.configDestroy = true; 3732 return true; 3733 } else if (r.state == ActivityState.RESUMED) { 3734 // Try to optimize this case: the configuration is changing 3735 // and we need to restart the top, resumed activity. 3736 // Instead of doing the normal handshaking, just say 3737 // "restart!". 3738 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3739 "Config is relaunching resumed " + r); 3740 relaunchActivityLocked(r, r.configChangeFlags, true); 3741 r.configChangeFlags = 0; 3742 } else { 3743 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3744 "Config is relaunching non-resumed " + r); 3745 relaunchActivityLocked(r, r.configChangeFlags, false); 3746 r.configChangeFlags = 0; 3747 } 3748 3749 // All done... tell the caller we weren't able to keep this 3750 // activity around. 3751 return false; 3752 } 3753 3754 // Default case: the activity can handle this new configuration, so 3755 // hand it over. Note that we don't need to give it the new 3756 // configuration, since we always send configuration changes to all 3757 // process when they happen so it can just use whatever configuration 3758 // it last got. 3759 if (r.app != null && r.app.thread != null) { 3760 try { 3761 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3762 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3763 } catch (RemoteException e) { 3764 // If process died, whatever. 3765 } 3766 } 3767 r.stopFreezingScreenLocked(false); 3768 3769 return true; 3770 } 3771 3772 private boolean relaunchActivityLocked(ActivityRecord r, 3773 int changes, boolean andResume) { 3774 List<ResultInfo> results = null; 3775 List<ReferrerIntent> newIntents = null; 3776 if (andResume) { 3777 results = r.results; 3778 newIntents = r.newIntents; 3779 } 3780 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3781 + " with results=" + results + " newIntents=" + newIntents 3782 + " andResume=" + andResume); 3783 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3784 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3785 r.task.taskId, r.shortComponentName); 3786 3787 r.startFreezingScreenLocked(r.app, 0); 3788 3789 mStackSupervisor.removeChildActivityContainers(r); 3790 3791 try { 3792 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3793 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3794 + r); 3795 r.forceNewConfig = false; 3796 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3797 changes, !andResume, new Configuration(mService.mConfiguration)); 3798 // Note: don't need to call pauseIfSleepingLocked() here, because 3799 // the caller will only pass in 'andResume' if this activity is 3800 // currently resumed, which implies we aren't sleeping. 3801 } catch (RemoteException e) { 3802 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3803 } 3804 3805 if (andResume) { 3806 r.results = null; 3807 r.newIntents = null; 3808 r.state = ActivityState.RESUMED; 3809 } else { 3810 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3811 r.state = ActivityState.PAUSED; 3812 } 3813 3814 return true; 3815 } 3816 3817 boolean willActivityBeVisibleLocked(IBinder token) { 3818 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3819 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3820 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3821 final ActivityRecord r = activities.get(activityNdx); 3822 if (r.appToken == token) { 3823 return true; 3824 } 3825 if (r.fullscreen && !r.finishing) { 3826 return false; 3827 } 3828 } 3829 } 3830 final ActivityRecord r = ActivityRecord.forToken(token); 3831 if (r == null) { 3832 return false; 3833 } 3834 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3835 + " would have returned true for r=" + r); 3836 return !r.finishing; 3837 } 3838 3839 void closeSystemDialogsLocked() { 3840 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3841 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3842 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3843 final ActivityRecord r = activities.get(activityNdx); 3844 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3845 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3846 } 3847 } 3848 } 3849 } 3850 3851 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3852 boolean didSomething = false; 3853 TaskRecord lastTask = null; 3854 ComponentName homeActivity = null; 3855 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3856 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3857 int numActivities = activities.size(); 3858 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3859 ActivityRecord r = activities.get(activityNdx); 3860 final boolean samePackage = r.packageName.equals(name) 3861 || (name == null && r.userId == userId); 3862 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3863 && (samePackage || r.task == lastTask) 3864 && (r.app == null || evenPersistent || !r.app.persistent)) { 3865 if (!doit) { 3866 if (r.finishing) { 3867 // If this activity is just finishing, then it is not 3868 // interesting as far as something to stop. 3869 continue; 3870 } 3871 return true; 3872 } 3873 if (r.isHomeActivity()) { 3874 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3875 Slog.i(TAG, "Skip force-stop again " + r); 3876 continue; 3877 } else { 3878 homeActivity = r.realActivity; 3879 } 3880 } 3881 didSomething = true; 3882 Slog.i(TAG, " Force finishing activity " + r); 3883 if (samePackage) { 3884 if (r.app != null) { 3885 r.app.removed = true; 3886 } 3887 r.app = null; 3888 } 3889 lastTask = r.task; 3890 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3891 true)) { 3892 // r has been deleted from mActivities, accommodate. 3893 --numActivities; 3894 --activityNdx; 3895 } 3896 } 3897 } 3898 } 3899 return didSomething; 3900 } 3901 3902 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3903 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3904 final TaskRecord task = mTaskHistory.get(taskNdx); 3905 ActivityRecord r = null; 3906 ActivityRecord top = null; 3907 int numActivities = 0; 3908 int numRunning = 0; 3909 final ArrayList<ActivityRecord> activities = task.mActivities; 3910 if (activities.isEmpty()) { 3911 continue; 3912 } 3913 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3914 continue; 3915 } 3916 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3917 r = activities.get(activityNdx); 3918 3919 // Initialize state for next task if needed. 3920 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3921 top = r; 3922 numActivities = numRunning = 0; 3923 } 3924 3925 // Add 'r' into the current task. 3926 numActivities++; 3927 if (r.app != null && r.app.thread != null) { 3928 numRunning++; 3929 } 3930 3931 if (localLOGV) Slog.v( 3932 TAG, r.intent.getComponent().flattenToShortString() 3933 + ": task=" + r.task); 3934 } 3935 3936 RunningTaskInfo ci = new RunningTaskInfo(); 3937 ci.id = task.taskId; 3938 ci.baseActivity = r.intent.getComponent(); 3939 ci.topActivity = top.intent.getComponent(); 3940 ci.lastActiveTime = task.lastActiveTime; 3941 3942 if (top.task != null) { 3943 ci.description = top.task.lastDescription; 3944 } 3945 ci.numActivities = numActivities; 3946 ci.numRunning = numRunning; 3947 //System.out.println( 3948 // "#" + maxNum + ": " + " descr=" + ci.description); 3949 list.add(ci); 3950 } 3951 } 3952 3953 public void unhandledBackLocked() { 3954 final int top = mTaskHistory.size() - 1; 3955 if (DEBUG_SWITCH) Slog.d( 3956 TAG, "Performing unhandledBack(): top activity at " + top); 3957 if (top >= 0) { 3958 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3959 int activityTop = activities.size() - 1; 3960 if (activityTop > 0) { 3961 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3962 "unhandled-back", true); 3963 } 3964 } 3965 } 3966 3967 /** 3968 * Reset local parameters because an app's activity died. 3969 * @param app The app of the activity that died. 3970 * @return result from removeHistoryRecordsForAppLocked. 3971 */ 3972 boolean handleAppDiedLocked(ProcessRecord app) { 3973 if (mPausingActivity != null && mPausingActivity.app == app) { 3974 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3975 "App died while pausing: " + mPausingActivity); 3976 mPausingActivity = null; 3977 } 3978 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3979 mLastPausedActivity = null; 3980 mLastNoHistoryActivity = null; 3981 } 3982 3983 return removeHistoryRecordsForAppLocked(app); 3984 } 3985 3986 void handleAppCrashLocked(ProcessRecord app) { 3987 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3988 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3989 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3990 final ActivityRecord r = activities.get(activityNdx); 3991 if (r.app == app) { 3992 Slog.w(TAG, " Force finishing activity " 3993 + r.intent.getComponent().flattenToShortString()); 3994 // Force the destroy to skip right to removal. 3995 r.app = null; 3996 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3997 } 3998 } 3999 } 4000 } 4001 4002 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4003 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4004 boolean printed = false; 4005 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4006 final TaskRecord task = mTaskHistory.get(taskNdx); 4007 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4008 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4009 dumpClient, dumpPackage, needSep, header, 4010 " Task id #" + task.taskId); 4011 if (printed) { 4012 header = null; 4013 } 4014 } 4015 return printed; 4016 } 4017 4018 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4019 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4020 4021 if ("all".equals(name)) { 4022 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4023 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4024 } 4025 } else if ("top".equals(name)) { 4026 final int top = mTaskHistory.size() - 1; 4027 if (top >= 0) { 4028 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4029 int listTop = list.size() - 1; 4030 if (listTop >= 0) { 4031 activities.add(list.get(listTop)); 4032 } 4033 } 4034 } else { 4035 ItemMatcher matcher = new ItemMatcher(); 4036 matcher.build(name); 4037 4038 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4039 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4040 if (matcher.match(r1, r1.intent.getComponent())) { 4041 activities.add(r1); 4042 } 4043 } 4044 } 4045 } 4046 4047 return activities; 4048 } 4049 4050 ActivityRecord restartPackage(String packageName) { 4051 ActivityRecord starting = topRunningActivityLocked(null); 4052 4053 // All activities that came from the package must be 4054 // restarted as if there was a config change. 4055 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4056 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4057 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4058 final ActivityRecord a = activities.get(activityNdx); 4059 if (a.info.packageName.equals(packageName)) { 4060 a.forceNewConfig = true; 4061 if (starting != null && a == starting && a.visible) { 4062 a.startFreezingScreenLocked(starting.app, 4063 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4064 } 4065 } 4066 } 4067 } 4068 4069 return starting; 4070 } 4071 4072 void removeTask(TaskRecord task) { 4073 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4074 mWindowManager.removeTask(task.taskId); 4075 final ActivityRecord r = mResumedActivity; 4076 if (r != null && r.task == task) { 4077 mResumedActivity = null; 4078 } 4079 4080 final int taskNdx = mTaskHistory.indexOf(task); 4081 final int topTaskNdx = mTaskHistory.size() - 1; 4082 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4083 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4084 if (!nextTask.isOverHomeStack()) { 4085 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4086 } 4087 } 4088 mTaskHistory.remove(task); 4089 updateTaskMovement(task, true); 4090 4091 if (task.mActivities.isEmpty()) { 4092 final boolean isVoiceSession = task.voiceSession != null; 4093 if (isVoiceSession) { 4094 try { 4095 task.voiceSession.taskFinished(task.intent, task.taskId); 4096 } catch (RemoteException e) { 4097 } 4098 } 4099 if (task.autoRemoveFromRecents() || isVoiceSession) { 4100 // Task creator asked to remove this when done, or this task was a voice 4101 // interaction, so it should not remain on the recent tasks list. 4102 mService.mRecentTasks.remove(task); 4103 task.removedFromRecents(mService.mTaskPersister); 4104 } 4105 } 4106 4107 if (mTaskHistory.isEmpty()) { 4108 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4109 if (isOnHomeDisplay()) { 4110 mStackSupervisor.moveHomeStack(!isHomeStack()); 4111 } 4112 if (mStacks != null) { 4113 mStacks.remove(this); 4114 mStacks.add(0, this); 4115 } 4116 mActivityContainer.onTaskListEmptyLocked(); 4117 } 4118 } 4119 4120 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4121 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4122 boolean toTop) { 4123 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4124 voiceInteractor); 4125 addTask(task, toTop, false); 4126 return task; 4127 } 4128 4129 ArrayList<TaskRecord> getAllTasks() { 4130 return new ArrayList<TaskRecord>(mTaskHistory); 4131 } 4132 4133 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4134 task.stack = this; 4135 if (toTop) { 4136 insertTaskAtTop(task); 4137 } else { 4138 mTaskHistory.add(0, task); 4139 updateTaskMovement(task, false); 4140 } 4141 if (!moving && task.voiceSession != null) { 4142 try { 4143 task.voiceSession.taskStarted(task.intent, task.taskId); 4144 } catch (RemoteException e) { 4145 } 4146 } 4147 } 4148 4149 public int getStackId() { 4150 return mStackId; 4151 } 4152 4153 @Override 4154 public String toString() { 4155 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4156 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4157 } 4158} 4159