ActivityStack.java revision 85d558cd486d195aabfc4b43cff8f338126f60a5
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 1542 // Make sure to notify Keyguard as well if it is waiting for an activity to be drawn. 1543 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1544 return false; 1545 } 1546 1547 final TaskRecord nextTask = next.task; 1548 if (prevTask != null && prevTask.stack == this && 1549 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1550 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1551 if (prevTask == nextTask) { 1552 prevTask.setFrontOfTask(); 1553 } else if (prevTask != topTask()) { 1554 // This task is going away but it was supposed to return to the home stack. 1555 // Now the task above it has to return to the home task instead. 1556 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1557 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1558 } else { 1559 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1560 "resumeTopActivityLocked: Launching home next"); 1561 // Only resume home if on home display 1562 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1563 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1564 return isOnHomeDisplay() && 1565 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1566 } 1567 } 1568 1569 // If we are sleeping, and there is no resumed activity, and the top 1570 // activity is paused, well that is the state we want. 1571 if (mService.isSleepingOrShuttingDown() 1572 && mLastPausedActivity == next 1573 && mStackSupervisor.allPausedActivitiesComplete()) { 1574 // Make sure we have executed any pending transitions, since there 1575 // should be nothing left to do at this point. 1576 mWindowManager.executeAppTransition(); 1577 mNoAnimActivities.clear(); 1578 ActivityOptions.abort(options); 1579 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1580 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1581 return false; 1582 } 1583 1584 // Make sure that the user who owns this activity is started. If not, 1585 // we will just leave it as is because someone should be bringing 1586 // another user's activities to the top of the stack. 1587 if (mService.mStartedUsers.get(next.userId) == null) { 1588 Slog.w(TAG, "Skipping resume of top activity " + next 1589 + ": user " + next.userId + " is stopped"); 1590 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1591 return false; 1592 } 1593 1594 // The activity may be waiting for stop, but that is no longer 1595 // appropriate for it. 1596 mStackSupervisor.mStoppingActivities.remove(next); 1597 mStackSupervisor.mGoingToSleepActivities.remove(next); 1598 next.sleeping = false; 1599 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1600 1601 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1602 1603 // If we are currently pausing an activity, then don't do anything 1604 // until that is done. 1605 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1606 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1607 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1608 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1609 return false; 1610 } 1611 1612 // Okay we are now going to start a switch, to 'next'. We may first 1613 // have to pause the current activity, but this is an important point 1614 // where we have decided to go to 'next' so keep track of that. 1615 // XXX "App Redirected" dialog is getting too many false positives 1616 // at this point, so turn off for now. 1617 if (false) { 1618 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1619 long now = SystemClock.uptimeMillis(); 1620 final boolean inTime = mLastStartedActivity.startTime != 0 1621 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1622 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1623 final int nextUid = next.info.applicationInfo.uid; 1624 if (inTime && lastUid != nextUid 1625 && lastUid != next.launchedFromUid 1626 && mService.checkPermission( 1627 android.Manifest.permission.STOP_APP_SWITCHES, 1628 -1, next.launchedFromUid) 1629 != PackageManager.PERMISSION_GRANTED) { 1630 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1631 } else { 1632 next.startTime = now; 1633 mLastStartedActivity = next; 1634 } 1635 } else { 1636 next.startTime = SystemClock.uptimeMillis(); 1637 mLastStartedActivity = next; 1638 } 1639 } 1640 1641 // We need to start pausing the current activity so the top one 1642 // can be resumed... 1643 boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0; 1644 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 1645 if (mResumedActivity != null) { 1646 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 1647 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1648 } 1649 if (pausing) { 1650 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1651 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1652 // At this point we want to put the upcoming activity's process 1653 // at the top of the LRU list, since we know we will be needing it 1654 // very soon and it would be a waste to let it get killed if it 1655 // happens to be sitting towards the end. 1656 if (next.app != null && next.app.thread != null) { 1657 mService.updateLruProcessLocked(next.app, true, null); 1658 } 1659 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1660 return true; 1661 } 1662 1663 // If the most recent activity was noHistory but was only stopped rather 1664 // than stopped+finished because the device went to sleep, we need to make 1665 // sure to finish it as we're making a new activity topmost. 1666 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1667 !mLastNoHistoryActivity.finishing) { 1668 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1669 " on new resume"); 1670 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1671 null, "no-history", false); 1672 mLastNoHistoryActivity = null; 1673 } 1674 1675 if (prev != null && prev != next) { 1676 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1677 prev.waitingVisible = true; 1678 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1679 if (DEBUG_SWITCH) Slog.v( 1680 TAG, "Resuming top, waiting visible to hide: " + prev); 1681 } else { 1682 // The next activity is already visible, so hide the previous 1683 // activity's windows right now so we can show the new one ASAP. 1684 // We only do this if the previous is finishing, which should mean 1685 // it is on top of the one being resumed so hiding it quickly 1686 // is good. Otherwise, we want to do the normal route of allowing 1687 // the resumed activity to be shown so we can decide if the 1688 // previous should actually be hidden depending on whether the 1689 // new one is found to be full-screen or not. 1690 if (prev.finishing) { 1691 mWindowManager.setAppVisibility(prev.appToken, false); 1692 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1693 + prev + ", waitingVisible=" 1694 + (prev != null ? prev.waitingVisible : null) 1695 + ", nowVisible=" + next.nowVisible); 1696 } else { 1697 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1698 + prev + ", waitingVisible=" 1699 + (prev != null ? prev.waitingVisible : null) 1700 + ", nowVisible=" + next.nowVisible); 1701 } 1702 } 1703 } 1704 1705 // Launching this app's activity, make sure the app is no longer 1706 // considered stopped. 1707 try { 1708 AppGlobals.getPackageManager().setPackageStoppedState( 1709 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1710 } catch (RemoteException e1) { 1711 } catch (IllegalArgumentException e) { 1712 Slog.w(TAG, "Failed trying to unstop package " 1713 + next.packageName + ": " + e); 1714 } 1715 1716 // We are starting up the next activity, so tell the window manager 1717 // that the previous one will be hidden soon. This way it can know 1718 // to ignore it when computing the desired screen orientation. 1719 boolean anim = true; 1720 if (prev != null) { 1721 if (prev.finishing) { 1722 if (DEBUG_TRANSITION) Slog.v(TAG, 1723 "Prepare close transition: prev=" + prev); 1724 if (mNoAnimActivities.contains(prev)) { 1725 anim = false; 1726 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1727 } else { 1728 mWindowManager.prepareAppTransition(prev.task == next.task 1729 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1730 : AppTransition.TRANSIT_TASK_CLOSE, false); 1731 } 1732 mWindowManager.setAppWillBeHidden(prev.appToken); 1733 mWindowManager.setAppVisibility(prev.appToken, false); 1734 } else { 1735 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1736 if (mNoAnimActivities.contains(next)) { 1737 anim = false; 1738 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1739 } else { 1740 mWindowManager.prepareAppTransition(prev.task == next.task 1741 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1742 : next.mLaunchTaskBehind 1743 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1744 : AppTransition.TRANSIT_TASK_OPEN, false); 1745 } 1746 } 1747 if (false) { 1748 mWindowManager.setAppWillBeHidden(prev.appToken); 1749 mWindowManager.setAppVisibility(prev.appToken, false); 1750 } 1751 } else { 1752 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1753 if (mNoAnimActivities.contains(next)) { 1754 anim = false; 1755 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1756 } else { 1757 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1758 } 1759 } 1760 1761 Bundle resumeAnimOptions = null; 1762 if (anim) { 1763 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1764 if (opts != null) { 1765 resumeAnimOptions = opts.toBundle(); 1766 } 1767 next.applyOptionsLocked(); 1768 } else { 1769 next.clearOptionsLocked(); 1770 } 1771 1772 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1773 if (next.app != null && next.app.thread != null) { 1774 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1775 1776 // This activity is now becoming visible. 1777 mWindowManager.setAppVisibility(next.appToken, true); 1778 1779 // schedule launch ticks to collect information about slow apps. 1780 next.startLaunchTickingLocked(); 1781 1782 ActivityRecord lastResumedActivity = 1783 lastStack == null ? null :lastStack.mResumedActivity; 1784 ActivityState lastState = next.state; 1785 1786 mService.updateCpuStats(); 1787 1788 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1789 next.state = ActivityState.RESUMED; 1790 mResumedActivity = next; 1791 next.task.touchActiveTime(); 1792 mService.addRecentTaskLocked(next.task); 1793 mService.updateLruProcessLocked(next.app, true, null); 1794 updateLRUListLocked(next); 1795 mService.updateOomAdjLocked(); 1796 1797 // Have the window manager re-evaluate the orientation of 1798 // the screen based on the new activity order. 1799 boolean notUpdated = true; 1800 if (mStackSupervisor.isFrontStack(this)) { 1801 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1802 mService.mConfiguration, 1803 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1804 if (config != null) { 1805 next.frozenBeforeDestroy = true; 1806 } 1807 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1808 } 1809 1810 if (notUpdated) { 1811 // The configuration update wasn't able to keep the existing 1812 // instance of the activity, and instead started a new one. 1813 // We should be all done, but let's just make sure our activity 1814 // is still at the top and schedule another run if something 1815 // weird happened. 1816 ActivityRecord nextNext = topRunningActivityLocked(null); 1817 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1818 "Activity config changed during resume: " + next 1819 + ", new next: " + nextNext); 1820 if (nextNext != next) { 1821 // Do over! 1822 mStackSupervisor.scheduleResumeTopActivities(); 1823 } 1824 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1825 mNoAnimActivities.clear(); 1826 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1827 return true; 1828 } 1829 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1830 return false; 1831 } 1832 1833 try { 1834 // Deliver all pending results. 1835 ArrayList<ResultInfo> a = next.results; 1836 if (a != null) { 1837 final int N = a.size(); 1838 if (!next.finishing && N > 0) { 1839 if (DEBUG_RESULTS) Slog.v( 1840 TAG, "Delivering results to " + next 1841 + ": " + a); 1842 next.app.thread.scheduleSendResult(next.appToken, a); 1843 } 1844 } 1845 1846 if (next.newIntents != null) { 1847 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1848 } 1849 1850 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1851 next.userId, System.identityHashCode(next), 1852 next.task.taskId, next.shortComponentName); 1853 1854 next.sleeping = false; 1855 mService.showAskCompatModeDialogLocked(next); 1856 next.app.pendingUiClean = true; 1857 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1858 next.clearOptionsLocked(); 1859 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1860 mService.isNextTransitionForward(), resumeAnimOptions); 1861 1862 mStackSupervisor.checkReadyForSleepLocked(); 1863 1864 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1865 } catch (Exception e) { 1866 // Whoops, need to restart this activity! 1867 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1868 + lastState + ": " + next); 1869 next.state = lastState; 1870 if (lastStack != null) { 1871 lastStack.mResumedActivity = lastResumedActivity; 1872 } 1873 Slog.i(TAG, "Restarting because process died: " + next); 1874 if (!next.hasBeenLaunched) { 1875 next.hasBeenLaunched = true; 1876 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1877 mStackSupervisor.isFrontStack(lastStack)) { 1878 mWindowManager.setAppStartingWindow( 1879 next.appToken, next.packageName, next.theme, 1880 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1881 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1882 next.windowFlags, null, true); 1883 } 1884 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1885 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1886 return true; 1887 } 1888 1889 // From this point on, if something goes wrong there is no way 1890 // to recover the activity. 1891 try { 1892 next.visible = true; 1893 completeResumeLocked(next); 1894 } catch (Exception e) { 1895 // If any exception gets thrown, toss away this 1896 // activity and try the next one. 1897 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1898 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1899 "resume-exception", true); 1900 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1901 return true; 1902 } 1903 next.stopped = false; 1904 1905 } else { 1906 // Whoops, need to restart this activity! 1907 if (!next.hasBeenLaunched) { 1908 next.hasBeenLaunched = true; 1909 } else { 1910 if (SHOW_APP_STARTING_PREVIEW) { 1911 mWindowManager.setAppStartingWindow( 1912 next.appToken, next.packageName, next.theme, 1913 mService.compatibilityInfoForPackageLocked( 1914 next.info.applicationInfo), 1915 next.nonLocalizedLabel, 1916 next.labelRes, next.icon, next.logo, next.windowFlags, 1917 null, true); 1918 } 1919 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1920 } 1921 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1922 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1923 } 1924 1925 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1926 return true; 1927 } 1928 1929 private void insertTaskAtTop(TaskRecord task) { 1930 // If this is being moved to the top by another activity or being launched from the home 1931 // activity, set mOnTopOfHome accordingly. 1932 if (isOnHomeDisplay()) { 1933 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1934 final boolean fromHome = lastStack.isHomeStack(); 1935 if (!isHomeStack() && (fromHome || topTask() != task)) { 1936 task.setTaskToReturnTo(fromHome 1937 ? lastStack.topTask() == null 1938 ? HOME_ACTIVITY_TYPE 1939 : lastStack.topTask().taskType 1940 : APPLICATION_ACTIVITY_TYPE); 1941 } 1942 } else { 1943 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1944 } 1945 1946 mTaskHistory.remove(task); 1947 // Now put task at top. 1948 int taskNdx = mTaskHistory.size(); 1949 if (!isCurrentProfileLocked(task.userId)) { 1950 // Put non-current user tasks below current user tasks. 1951 while (--taskNdx >= 0) { 1952 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1953 break; 1954 } 1955 } 1956 ++taskNdx; 1957 } 1958 mTaskHistory.add(taskNdx, task); 1959 updateTaskMovement(task, true); 1960 } 1961 1962 final void startActivityLocked(ActivityRecord r, boolean newTask, 1963 boolean doResume, boolean keepCurTransition, Bundle options) { 1964 TaskRecord rTask = r.task; 1965 final int taskId = rTask.taskId; 1966 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1967 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1968 // Last activity in task had been removed or ActivityManagerService is reusing task. 1969 // Insert or replace. 1970 // Might not even be in. 1971 insertTaskAtTop(rTask); 1972 mWindowManager.moveTaskToTop(taskId); 1973 } 1974 TaskRecord task = null; 1975 if (!newTask) { 1976 // If starting in an existing task, find where that is... 1977 boolean startIt = true; 1978 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1979 task = mTaskHistory.get(taskNdx); 1980 if (task.getTopActivity() == null) { 1981 // All activities in task are finishing. 1982 continue; 1983 } 1984 if (task == r.task) { 1985 // Here it is! Now, if this is not yet visible to the 1986 // user, then just add it without starting; it will 1987 // get started when the user navigates back to it. 1988 if (!startIt) { 1989 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1990 + task, new RuntimeException("here").fillInStackTrace()); 1991 task.addActivityToTop(r); 1992 r.putInHistory(); 1993 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1994 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1995 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1996 r.userId, r.info.configChanges, task.voiceSession != null, 1997 r.mLaunchTaskBehind); 1998 if (VALIDATE_TOKENS) { 1999 validateAppTokensLocked(); 2000 } 2001 ActivityOptions.abort(options); 2002 return; 2003 } 2004 break; 2005 } else if (task.numFullscreen > 0) { 2006 startIt = false; 2007 } 2008 } 2009 } 2010 2011 // Place a new activity at top of stack, so it is next to interact 2012 // with the user. 2013 2014 // If we are not placing the new activity frontmost, we do not want 2015 // to deliver the onUserLeaving callback to the actual frontmost 2016 // activity 2017 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2018 mStackSupervisor.mUserLeaving = false; 2019 if (DEBUG_USER_LEAVING) Slog.v(TAG, 2020 "startActivity() behind front, mUserLeaving=false"); 2021 } 2022 2023 task = r.task; 2024 2025 // Slot the activity into the history stack and proceed 2026 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2027 new RuntimeException("here").fillInStackTrace()); 2028 task.addActivityToTop(r); 2029 task.setFrontOfTask(); 2030 2031 r.putInHistory(); 2032 if (!isHomeStack() || numActivities() > 0) { 2033 // We want to show the starting preview window if we are 2034 // switching to a new task, or the next activity's process is 2035 // not currently running. 2036 boolean showStartingIcon = newTask; 2037 ProcessRecord proc = r.app; 2038 if (proc == null) { 2039 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2040 } 2041 if (proc == null || proc.thread == null) { 2042 showStartingIcon = true; 2043 } 2044 if (DEBUG_TRANSITION) Slog.v(TAG, 2045 "Prepare open transition: starting " + r); 2046 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2047 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2048 mNoAnimActivities.add(r); 2049 } else { 2050 mWindowManager.prepareAppTransition(newTask 2051 ? r.mLaunchTaskBehind 2052 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2053 : AppTransition.TRANSIT_TASK_OPEN 2054 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2055 mNoAnimActivities.remove(r); 2056 } 2057 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2058 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2059 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2060 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2061 boolean doShow = true; 2062 if (newTask) { 2063 // Even though this activity is starting fresh, we still need 2064 // to reset it to make sure we apply affinities to move any 2065 // existing activities from other tasks in to it. 2066 // If the caller has requested that the target task be 2067 // reset, then do so. 2068 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2069 resetTaskIfNeededLocked(r, r); 2070 doShow = topRunningNonDelayedActivityLocked(null) == r; 2071 } 2072 } else if (options != null && new ActivityOptions(options).getAnimationType() 2073 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2074 doShow = false; 2075 } 2076 if (r.mLaunchTaskBehind) { 2077 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2078 // tell WindowManager that r is visible even though it is at the back of the stack. 2079 mWindowManager.setAppVisibility(r.appToken, true); 2080 ensureActivitiesVisibleLocked(null, 0); 2081 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2082 // Figure out if we are transitioning from another activity that is 2083 // "has the same starting icon" as the next one. This allows the 2084 // window manager to keep the previous window it had previously 2085 // created, if it still had one. 2086 ActivityRecord prev = mResumedActivity; 2087 if (prev != null) { 2088 // We don't want to reuse the previous starting preview if: 2089 // (1) The current activity is in a different task. 2090 if (prev.task != r.task) { 2091 prev = null; 2092 } 2093 // (2) The current activity is already displayed. 2094 else if (prev.nowVisible) { 2095 prev = null; 2096 } 2097 } 2098 mWindowManager.setAppStartingWindow( 2099 r.appToken, r.packageName, r.theme, 2100 mService.compatibilityInfoForPackageLocked( 2101 r.info.applicationInfo), r.nonLocalizedLabel, 2102 r.labelRes, r.icon, r.logo, r.windowFlags, 2103 prev != null ? prev.appToken : null, showStartingIcon); 2104 r.mStartingWindowShown = true; 2105 } 2106 } else { 2107 // If this is the first activity, don't do any fancy animations, 2108 // because there is nothing for it to animate on top of. 2109 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2110 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2111 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2112 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2113 ActivityOptions.abort(options); 2114 options = null; 2115 } 2116 if (VALIDATE_TOKENS) { 2117 validateAppTokensLocked(); 2118 } 2119 2120 if (doResume) { 2121 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2122 } 2123 } 2124 2125 final void validateAppTokensLocked() { 2126 mValidateAppTokens.clear(); 2127 mValidateAppTokens.ensureCapacity(numActivities()); 2128 final int numTasks = mTaskHistory.size(); 2129 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2130 TaskRecord task = mTaskHistory.get(taskNdx); 2131 final ArrayList<ActivityRecord> activities = task.mActivities; 2132 if (activities.isEmpty()) { 2133 continue; 2134 } 2135 TaskGroup group = new TaskGroup(); 2136 group.taskId = task.taskId; 2137 mValidateAppTokens.add(group); 2138 final int numActivities = activities.size(); 2139 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2140 final ActivityRecord r = activities.get(activityNdx); 2141 group.tokens.add(r.appToken); 2142 } 2143 } 2144 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2145 } 2146 2147 /** 2148 * Perform a reset of the given task, if needed as part of launching it. 2149 * Returns the new HistoryRecord at the top of the task. 2150 */ 2151 /** 2152 * Helper method for #resetTaskIfNeededLocked. 2153 * We are inside of the task being reset... we'll either finish this activity, push it out 2154 * for another task, or leave it as-is. 2155 * @param task The task containing the Activity (taskTop) that might be reset. 2156 * @param forceReset 2157 * @return An ActivityOptions that needs to be processed. 2158 */ 2159 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2160 ActivityOptions topOptions = null; 2161 2162 int replyChainEnd = -1; 2163 boolean canMoveOptions = true; 2164 2165 // We only do this for activities that are not the root of the task (since if we finish 2166 // the root, we may no longer have the task!). 2167 final ArrayList<ActivityRecord> activities = task.mActivities; 2168 final int numActivities = activities.size(); 2169 final int rootActivityNdx = task.findEffectiveRootIndex(); 2170 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2171 ActivityRecord target = activities.get(i); 2172 if (target.frontOfTask) 2173 break; 2174 2175 final int flags = target.info.flags; 2176 final boolean finishOnTaskLaunch = 2177 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2178 final boolean allowTaskReparenting = 2179 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2180 final boolean clearWhenTaskReset = 2181 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2182 2183 if (!finishOnTaskLaunch 2184 && !clearWhenTaskReset 2185 && target.resultTo != null) { 2186 // If this activity is sending a reply to a previous 2187 // activity, we can't do anything with it now until 2188 // we reach the start of the reply chain. 2189 // XXX note that we are assuming the result is always 2190 // to the previous activity, which is almost always 2191 // the case but we really shouldn't count on. 2192 if (replyChainEnd < 0) { 2193 replyChainEnd = i; 2194 } 2195 } else if (!finishOnTaskLaunch 2196 && !clearWhenTaskReset 2197 && allowTaskReparenting 2198 && target.taskAffinity != null 2199 && !target.taskAffinity.equals(task.affinity)) { 2200 // If this activity has an affinity for another 2201 // task, then we need to move it out of here. We will 2202 // move it as far out of the way as possible, to the 2203 // bottom of the activity stack. This also keeps it 2204 // correctly ordered with any activities we previously 2205 // moved. 2206 final TaskRecord targetTask; 2207 final ActivityRecord bottom = 2208 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2209 mTaskHistory.get(0).mActivities.get(0) : null; 2210 if (bottom != null && target.taskAffinity != null 2211 && target.taskAffinity.equals(bottom.task.affinity)) { 2212 // If the activity currently at the bottom has the 2213 // same task affinity as the one we are moving, 2214 // then merge it into the same task. 2215 targetTask = bottom.task; 2216 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2217 + " out to bottom task " + bottom.task); 2218 } else { 2219 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2220 null, null, null, false); 2221 targetTask.affinityIntent = target.intent; 2222 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2223 + " out to new task " + target.task); 2224 } 2225 2226 final int targetTaskId = targetTask.taskId; 2227 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2228 2229 boolean noOptions = canMoveOptions; 2230 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2231 for (int srcPos = start; srcPos >= i; --srcPos) { 2232 final ActivityRecord p = activities.get(srcPos); 2233 if (p.finishing) { 2234 continue; 2235 } 2236 2237 canMoveOptions = false; 2238 if (noOptions && topOptions == null) { 2239 topOptions = p.takeOptionsLocked(); 2240 if (topOptions != null) { 2241 noOptions = false; 2242 } 2243 } 2244 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2245 + task + " adding to task=" + targetTask 2246 + " Callers=" + Debug.getCallers(4)); 2247 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2248 + " out to target's task " + target.task); 2249 p.setTask(targetTask, null); 2250 targetTask.addActivityAtBottom(p); 2251 2252 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2253 } 2254 2255 mWindowManager.moveTaskToBottom(targetTaskId); 2256 if (VALIDATE_TOKENS) { 2257 validateAppTokensLocked(); 2258 } 2259 2260 replyChainEnd = -1; 2261 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2262 // If the activity should just be removed -- either 2263 // because it asks for it, or the task should be 2264 // cleared -- then finish it and anything that is 2265 // part of its reply chain. 2266 int end; 2267 if (clearWhenTaskReset) { 2268 // In this case, we want to finish this activity 2269 // and everything above it, so be sneaky and pretend 2270 // like these are all in the reply chain. 2271 end = numActivities - 1; 2272 } else if (replyChainEnd < 0) { 2273 end = i; 2274 } else { 2275 end = replyChainEnd; 2276 } 2277 boolean noOptions = canMoveOptions; 2278 for (int srcPos = i; srcPos <= end; srcPos++) { 2279 ActivityRecord p = activities.get(srcPos); 2280 if (p.finishing) { 2281 continue; 2282 } 2283 canMoveOptions = false; 2284 if (noOptions && topOptions == null) { 2285 topOptions = p.takeOptionsLocked(); 2286 if (topOptions != null) { 2287 noOptions = false; 2288 } 2289 } 2290 if (DEBUG_TASKS) Slog.w(TAG, 2291 "resetTaskIntendedTask: calling finishActivity on " + p); 2292 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2293 end--; 2294 srcPos--; 2295 } 2296 } 2297 replyChainEnd = -1; 2298 } else { 2299 // If we were in the middle of a chain, well the 2300 // activity that started it all doesn't want anything 2301 // special, so leave it all as-is. 2302 replyChainEnd = -1; 2303 } 2304 } 2305 2306 return topOptions; 2307 } 2308 2309 /** 2310 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2311 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2312 * @param affinityTask The task we are looking for an affinity to. 2313 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2314 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2315 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2316 */ 2317 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2318 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2319 int replyChainEnd = -1; 2320 final int taskId = task.taskId; 2321 final String taskAffinity = task.affinity; 2322 2323 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2324 final int numActivities = activities.size(); 2325 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2326 2327 // Do not operate on or below the effective root Activity. 2328 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2329 ActivityRecord target = activities.get(i); 2330 if (target.frontOfTask) 2331 break; 2332 2333 final int flags = target.info.flags; 2334 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2335 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2336 2337 if (target.resultTo != null) { 2338 // If this activity is sending a reply to a previous 2339 // activity, we can't do anything with it now until 2340 // we reach the start of the reply chain. 2341 // XXX note that we are assuming the result is always 2342 // to the previous activity, which is almost always 2343 // the case but we really shouldn't count on. 2344 if (replyChainEnd < 0) { 2345 replyChainEnd = i; 2346 } 2347 } else if (topTaskIsHigher 2348 && allowTaskReparenting 2349 && taskAffinity != null 2350 && taskAffinity.equals(target.taskAffinity)) { 2351 // This activity has an affinity for our task. Either remove it if we are 2352 // clearing or move it over to our task. Note that 2353 // we currently punt on the case where we are resetting a 2354 // task that is not at the top but who has activities above 2355 // with an affinity to it... this is really not a normal 2356 // case, and we will need to later pull that task to the front 2357 // and usually at that point we will do the reset and pick 2358 // up those remaining activities. (This only happens if 2359 // someone starts an activity in a new task from an activity 2360 // in a task that is not currently on top.) 2361 if (forceReset || finishOnTaskLaunch) { 2362 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2363 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2364 for (int srcPos = start; srcPos >= i; --srcPos) { 2365 final ActivityRecord p = activities.get(srcPos); 2366 if (p.finishing) { 2367 continue; 2368 } 2369 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2370 } 2371 } else { 2372 if (taskInsertionPoint < 0) { 2373 taskInsertionPoint = task.mActivities.size(); 2374 2375 } 2376 2377 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2378 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2379 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2380 for (int srcPos = start; srcPos >= i; --srcPos) { 2381 final ActivityRecord p = activities.get(srcPos); 2382 p.setTask(task, null); 2383 task.addActivityAtIndex(taskInsertionPoint, p); 2384 2385 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2386 + " to stack at " + task, 2387 new RuntimeException("here").fillInStackTrace()); 2388 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2389 + " in to resetting task " + task); 2390 mWindowManager.setAppGroupId(p.appToken, taskId); 2391 } 2392 mWindowManager.moveTaskToTop(taskId); 2393 if (VALIDATE_TOKENS) { 2394 validateAppTokensLocked(); 2395 } 2396 2397 // Now we've moved it in to place... but what if this is 2398 // a singleTop activity and we have put it on top of another 2399 // instance of the same activity? Then we drop the instance 2400 // below so it remains singleTop. 2401 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2402 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2403 int targetNdx = taskActivities.indexOf(target); 2404 if (targetNdx > 0) { 2405 ActivityRecord p = taskActivities.get(targetNdx - 1); 2406 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2407 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2408 false); 2409 } 2410 } 2411 } 2412 } 2413 2414 replyChainEnd = -1; 2415 } 2416 } 2417 return taskInsertionPoint; 2418 } 2419 2420 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2421 ActivityRecord newActivity) { 2422 boolean forceReset = 2423 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2424 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2425 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2426 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2427 forceReset = true; 2428 } 2429 } 2430 2431 final TaskRecord task = taskTop.task; 2432 2433 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2434 * for remaining tasks. Used for later tasks to reparent to task. */ 2435 boolean taskFound = false; 2436 2437 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2438 ActivityOptions topOptions = null; 2439 2440 // Preserve the location for reparenting in the new task. 2441 int reparentInsertionPoint = -1; 2442 2443 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2444 final TaskRecord targetTask = mTaskHistory.get(i); 2445 2446 if (targetTask == task) { 2447 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2448 taskFound = true; 2449 } else { 2450 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2451 taskFound, forceReset, reparentInsertionPoint); 2452 } 2453 } 2454 2455 int taskNdx = mTaskHistory.indexOf(task); 2456 do { 2457 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2458 } while (taskTop == null && taskNdx >= 0); 2459 2460 if (topOptions != null) { 2461 // If we got some ActivityOptions from an activity on top that 2462 // was removed from the task, propagate them to the new real top. 2463 if (taskTop != null) { 2464 taskTop.updateOptionsLocked(topOptions); 2465 } else { 2466 topOptions.abort(); 2467 } 2468 } 2469 2470 return taskTop; 2471 } 2472 2473 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2474 String resultWho, int requestCode, int resultCode, Intent data) { 2475 2476 if (callingUid > 0) { 2477 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2478 data, r.getUriPermissionsLocked(), r.userId); 2479 } 2480 2481 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2482 + " : who=" + resultWho + " req=" + requestCode 2483 + " res=" + resultCode + " data=" + data); 2484 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2485 try { 2486 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2487 list.add(new ResultInfo(resultWho, requestCode, 2488 resultCode, data)); 2489 r.app.thread.scheduleSendResult(r.appToken, list); 2490 return; 2491 } catch (Exception e) { 2492 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2493 } 2494 } 2495 2496 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2497 } 2498 2499 private void adjustFocusedActivityLocked(ActivityRecord r) { 2500 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2501 ActivityRecord next = topRunningActivityLocked(null); 2502 if (next != r) { 2503 final TaskRecord task = r.task; 2504 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2505 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2506 } 2507 } 2508 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2509 if (top != null) { 2510 mService.setFocusedActivityLocked(top); 2511 } 2512 } 2513 } 2514 2515 final void stopActivityLocked(ActivityRecord r) { 2516 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2517 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2518 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2519 if (!r.finishing) { 2520 if (!mService.isSleeping()) { 2521 if (DEBUG_STATES) { 2522 Slog.d(TAG, "no-history finish of " + r); 2523 } 2524 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2525 "no-history", false); 2526 } else { 2527 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2528 + " on stop because we're just sleeping"); 2529 } 2530 } 2531 } 2532 2533 if (r.app != null && r.app.thread != null) { 2534 adjustFocusedActivityLocked(r); 2535 r.resumeKeyDispatchingLocked(); 2536 try { 2537 r.stopped = false; 2538 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2539 + " (stop requested)"); 2540 r.state = ActivityState.STOPPING; 2541 if (DEBUG_VISBILITY) Slog.v( 2542 TAG, "Stopping visible=" + r.visible + " for " + r); 2543 if (!r.visible) { 2544 mWindowManager.setAppVisibility(r.appToken, false); 2545 } 2546 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2547 if (mService.isSleepingOrShuttingDown()) { 2548 r.setSleeping(true); 2549 } 2550 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2551 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2552 } catch (Exception e) { 2553 // Maybe just ignore exceptions here... if the process 2554 // has crashed, our death notification will clean things 2555 // up. 2556 Slog.w(TAG, "Exception thrown during pause", e); 2557 // Just in case, assume it to be stopped. 2558 r.stopped = true; 2559 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2560 r.state = ActivityState.STOPPED; 2561 if (r.configDestroy) { 2562 destroyActivityLocked(r, true, "stop-except"); 2563 } 2564 } 2565 } 2566 } 2567 2568 /** 2569 * @return Returns true if the activity is being finished, false if for 2570 * some reason it is being left as-is. 2571 */ 2572 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2573 Intent resultData, String reason, boolean oomAdj) { 2574 ActivityRecord r = isInStackLocked(token); 2575 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2576 TAG, "Finishing activity token=" + token + " r=" 2577 + ", result=" + resultCode + ", data=" + resultData 2578 + ", reason=" + reason); 2579 if (r == null) { 2580 return false; 2581 } 2582 2583 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2584 return true; 2585 } 2586 2587 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2588 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2589 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2590 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2591 ActivityRecord r = activities.get(activityNdx); 2592 if (r.resultTo == self && r.requestCode == requestCode) { 2593 if ((r.resultWho == null && resultWho == null) || 2594 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2595 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2596 false); 2597 } 2598 } 2599 } 2600 } 2601 mService.updateOomAdjLocked(); 2602 } 2603 2604 final void finishTopRunningActivityLocked(ProcessRecord app) { 2605 ActivityRecord r = topRunningActivityLocked(null); 2606 if (r != null && r.app == app) { 2607 // If the top running activity is from this crashing 2608 // process, then terminate it to avoid getting in a loop. 2609 Slog.w(TAG, " Force finishing activity " 2610 + r.intent.getComponent().flattenToShortString()); 2611 int taskNdx = mTaskHistory.indexOf(r.task); 2612 int activityNdx = r.task.mActivities.indexOf(r); 2613 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2614 // Also terminate any activities below it that aren't yet 2615 // stopped, to avoid a situation where one will get 2616 // re-start our crashing activity once it gets resumed again. 2617 --activityNdx; 2618 if (activityNdx < 0) { 2619 do { 2620 --taskNdx; 2621 if (taskNdx < 0) { 2622 break; 2623 } 2624 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2625 } while (activityNdx < 0); 2626 } 2627 if (activityNdx >= 0) { 2628 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2629 if (r.state == ActivityState.RESUMED 2630 || r.state == ActivityState.PAUSING 2631 || r.state == ActivityState.PAUSED) { 2632 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2633 Slog.w(TAG, " Force finishing activity " 2634 + r.intent.getComponent().flattenToShortString()); 2635 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2636 } 2637 } 2638 } 2639 } 2640 } 2641 2642 final void finishVoiceTask(IVoiceInteractionSession session) { 2643 IBinder sessionBinder = session.asBinder(); 2644 boolean didOne = false; 2645 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2646 TaskRecord tr = mTaskHistory.get(taskNdx); 2647 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2648 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2649 ActivityRecord r = tr.mActivities.get(activityNdx); 2650 if (!r.finishing) { 2651 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2652 false); 2653 didOne = true; 2654 } 2655 } 2656 } 2657 } 2658 if (didOne) { 2659 mService.updateOomAdjLocked(); 2660 } 2661 } 2662 2663 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2664 ArrayList<ActivityRecord> activities = r.task.mActivities; 2665 for (int index = activities.indexOf(r); index >= 0; --index) { 2666 ActivityRecord cur = activities.get(index); 2667 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2668 break; 2669 } 2670 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2671 } 2672 return true; 2673 } 2674 2675 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2676 // send the result 2677 ActivityRecord resultTo = r.resultTo; 2678 if (resultTo != null) { 2679 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2680 + " who=" + r.resultWho + " req=" + r.requestCode 2681 + " res=" + resultCode + " data=" + resultData); 2682 if (resultTo.userId != r.userId) { 2683 if (resultData != null) { 2684 resultData.setContentUserHint(r.userId); 2685 } 2686 } 2687 if (r.info.applicationInfo.uid > 0) { 2688 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2689 resultTo.packageName, resultData, 2690 resultTo.getUriPermissionsLocked(), resultTo.userId); 2691 } 2692 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2693 resultData); 2694 r.resultTo = null; 2695 } 2696 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2697 2698 // Make sure this HistoryRecord is not holding on to other resources, 2699 // because clients have remote IPC references to this object so we 2700 // can't assume that will go away and want to avoid circular IPC refs. 2701 r.results = null; 2702 r.pendingResults = null; 2703 r.newIntents = null; 2704 r.icicle = null; 2705 } 2706 2707 /** 2708 * @return Returns true if this activity has been removed from the history 2709 * list, or false if it is still in the list and will be removed later. 2710 */ 2711 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2712 String reason, boolean oomAdj) { 2713 if (r.finishing) { 2714 Slog.w(TAG, "Duplicate finish request for " + r); 2715 return false; 2716 } 2717 2718 r.makeFinishing(); 2719 final TaskRecord task = r.task; 2720 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2721 r.userId, System.identityHashCode(r), 2722 task.taskId, r.shortComponentName, reason); 2723 final ArrayList<ActivityRecord> activities = task.mActivities; 2724 final int index = activities.indexOf(r); 2725 if (index < (activities.size() - 1)) { 2726 task.setFrontOfTask(); 2727 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2728 // If the caller asked that this activity (and all above it) 2729 // be cleared when the task is reset, don't lose that information, 2730 // but propagate it up to the next activity. 2731 ActivityRecord next = activities.get(index+1); 2732 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2733 } 2734 } 2735 2736 r.pauseKeyDispatchingLocked(); 2737 2738 adjustFocusedActivityLocked(r); 2739 2740 finishActivityResultsLocked(r, resultCode, resultData); 2741 2742 if (mResumedActivity == r) { 2743 boolean endTask = index <= 0; 2744 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2745 "Prepare close transition: finishing " + r); 2746 mWindowManager.prepareAppTransition(endTask 2747 ? AppTransition.TRANSIT_TASK_CLOSE 2748 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2749 2750 // Tell window manager to prepare for this one to be removed. 2751 mWindowManager.setAppVisibility(r.appToken, false); 2752 2753 if (mPausingActivity == null) { 2754 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2755 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2756 startPausingLocked(false, false, false, false); 2757 } 2758 2759 if (endTask) { 2760 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2761 } 2762 } else if (r.state != ActivityState.PAUSING) { 2763 // If the activity is PAUSING, we will complete the finish once 2764 // it is done pausing; else we can just directly finish it here. 2765 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2766 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2767 } else { 2768 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2769 } 2770 2771 return false; 2772 } 2773 2774 static final int FINISH_IMMEDIATELY = 0; 2775 static final int FINISH_AFTER_PAUSE = 1; 2776 static final int FINISH_AFTER_VISIBLE = 2; 2777 2778 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2779 // First things first: if this activity is currently visible, 2780 // and the resumed activity is not yet visible, then hold off on 2781 // finishing until the resumed one becomes visible. 2782 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2783 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2784 mStackSupervisor.mStoppingActivities.add(r); 2785 if (mStackSupervisor.mStoppingActivities.size() > 3 2786 || r.frontOfTask && mTaskHistory.size() <= 1) { 2787 // If we already have a few activities waiting to stop, 2788 // then give up on things going idle and start clearing 2789 // them out. Or if r is the last of activity of the last task the stack 2790 // will be empty and must be cleared immediately. 2791 mStackSupervisor.scheduleIdleLocked(); 2792 } else { 2793 mStackSupervisor.checkReadyForSleepLocked(); 2794 } 2795 } 2796 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2797 + " (finish requested)"); 2798 r.state = ActivityState.STOPPING; 2799 if (oomAdj) { 2800 mService.updateOomAdjLocked(); 2801 } 2802 return r; 2803 } 2804 2805 // make sure the record is cleaned out of other places. 2806 mStackSupervisor.mStoppingActivities.remove(r); 2807 mStackSupervisor.mGoingToSleepActivities.remove(r); 2808 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2809 if (mResumedActivity == r) { 2810 mResumedActivity = null; 2811 } 2812 final ActivityState prevState = r.state; 2813 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2814 r.state = ActivityState.FINISHING; 2815 2816 if (mode == FINISH_IMMEDIATELY 2817 || prevState == ActivityState.STOPPED 2818 || prevState == ActivityState.INITIALIZING) { 2819 // If this activity is already stopped, we can just finish 2820 // it right now. 2821 r.makeFinishing(); 2822 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2823 if (activityRemoved) { 2824 mStackSupervisor.resumeTopActivitiesLocked(); 2825 } 2826 if (DEBUG_CONTAINERS) Slog.d(TAG, 2827 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2828 " destroy returned removed=" + activityRemoved); 2829 return activityRemoved ? null : r; 2830 } 2831 2832 // Need to go through the full pause cycle to get this 2833 // activity into the stopped state and then finish it. 2834 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2835 mStackSupervisor.mFinishingActivities.add(r); 2836 r.resumeKeyDispatchingLocked(); 2837 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2838 return r; 2839 } 2840 2841 void finishAllActivitiesLocked(boolean immediately) { 2842 boolean noActivitiesInStack = true; 2843 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2844 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2845 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2846 final ActivityRecord r = activities.get(activityNdx); 2847 noActivitiesInStack = false; 2848 if (r.finishing && !immediately) { 2849 continue; 2850 } 2851 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2852 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2853 } 2854 } 2855 if (noActivitiesInStack) { 2856 mActivityContainer.onTaskListEmptyLocked(); 2857 } 2858 } 2859 2860 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2861 // Basic case: for simple app-centric recents, we need to recreate 2862 // the task if the affinity has changed. 2863 if (srec == null || srec.task.affinity == null || 2864 !srec.task.affinity.equals(destAffinity)) { 2865 return true; 2866 } 2867 // Document-centric case: an app may be split in to multiple documents; 2868 // they need to re-create their task if this current activity is the root 2869 // of a document, unless simply finishing it will return them to the the 2870 // correct app behind. 2871 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 2872 && srec.task.getBaseIntent().isDocument()) { 2873 // Okay, this activity is at the root of its task. What to do, what to do... 2874 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2875 // Finishing won't return to an application, so we need to recreate. 2876 return true; 2877 } 2878 // We now need to get the task below it to determine what to do. 2879 int taskIdx = mTaskHistory.indexOf(srec.task); 2880 if (taskIdx <= 0) { 2881 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2882 return false; 2883 } 2884 if (taskIdx == 0) { 2885 // At the bottom of the stack, nothing to go back to. 2886 return true; 2887 } 2888 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2889 if (!srec.task.affinity.equals(prevTask.affinity)) { 2890 // These are different apps, so need to recreate. 2891 return true; 2892 } 2893 } 2894 return false; 2895 } 2896 2897 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2898 Intent resultData) { 2899 final ActivityRecord srec = ActivityRecord.forToken(token); 2900 final TaskRecord task = srec.task; 2901 final ArrayList<ActivityRecord> activities = task.mActivities; 2902 final int start = activities.indexOf(srec); 2903 if (!mTaskHistory.contains(task) || (start < 0)) { 2904 return false; 2905 } 2906 int finishTo = start - 1; 2907 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2908 boolean foundParentInTask = false; 2909 final ComponentName dest = destIntent.getComponent(); 2910 if (start > 0 && dest != null) { 2911 for (int i = finishTo; i >= 0; i--) { 2912 ActivityRecord r = activities.get(i); 2913 if (r.info.packageName.equals(dest.getPackageName()) && 2914 r.info.name.equals(dest.getClassName())) { 2915 finishTo = i; 2916 parent = r; 2917 foundParentInTask = true; 2918 break; 2919 } 2920 } 2921 } 2922 2923 IActivityController controller = mService.mController; 2924 if (controller != null) { 2925 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2926 if (next != null) { 2927 // ask watcher if this is allowed 2928 boolean resumeOK = true; 2929 try { 2930 resumeOK = controller.activityResuming(next.packageName); 2931 } catch (RemoteException e) { 2932 mService.mController = null; 2933 Watchdog.getInstance().setActivityController(null); 2934 } 2935 2936 if (!resumeOK) { 2937 return false; 2938 } 2939 } 2940 } 2941 final long origId = Binder.clearCallingIdentity(); 2942 for (int i = start; i > finishTo; i--) { 2943 ActivityRecord r = activities.get(i); 2944 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2945 // Only return the supplied result for the first activity finished 2946 resultCode = Activity.RESULT_CANCELED; 2947 resultData = null; 2948 } 2949 2950 if (parent != null && foundParentInTask) { 2951 final int parentLaunchMode = parent.info.launchMode; 2952 final int destIntentFlags = destIntent.getFlags(); 2953 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2954 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2955 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2956 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2957 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 2958 srec.packageName); 2959 } else { 2960 try { 2961 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2962 destIntent.getComponent(), 0, srec.userId); 2963 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2964 null, aInfo, null, null, parent.appToken, null, 2965 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2966 -1, parent.launchedFromUid, 0, null, true, null, null, null); 2967 foundParentInTask = res == ActivityManager.START_SUCCESS; 2968 } catch (RemoteException e) { 2969 foundParentInTask = false; 2970 } 2971 requestFinishActivityLocked(parent.appToken, resultCode, 2972 resultData, "navigate-up", true); 2973 } 2974 } 2975 Binder.restoreCallingIdentity(origId); 2976 return foundParentInTask; 2977 } 2978 /** 2979 * Perform the common clean-up of an activity record. This is called both 2980 * as part of destroyActivityLocked() (when destroying the client-side 2981 * representation) and cleaning things up as a result of its hosting 2982 * processing going away, in which case there is no remaining client-side 2983 * state to destroy so only the cleanup here is needed. 2984 */ 2985 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2986 boolean setState) { 2987 if (mResumedActivity == r) { 2988 mResumedActivity = null; 2989 } 2990 if (mPausingActivity == r) { 2991 mPausingActivity = null; 2992 } 2993 mService.clearFocusedActivity(r); 2994 2995 r.configDestroy = false; 2996 r.frozenBeforeDestroy = false; 2997 2998 if (setState) { 2999 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 3000 r.state = ActivityState.DESTROYED; 3001 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 3002 r.app = null; 3003 } 3004 3005 // Make sure this record is no longer in the pending finishes list. 3006 // This could happen, for example, if we are trimming activities 3007 // down to the max limit while they are still waiting to finish. 3008 mStackSupervisor.mFinishingActivities.remove(r); 3009 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3010 3011 // Remove any pending results. 3012 if (r.finishing && r.pendingResults != null) { 3013 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3014 PendingIntentRecord rec = apr.get(); 3015 if (rec != null) { 3016 mService.cancelIntentSenderLocked(rec, false); 3017 } 3018 } 3019 r.pendingResults = null; 3020 } 3021 3022 if (cleanServices) { 3023 cleanUpActivityServicesLocked(r); 3024 } 3025 3026 // Get rid of any pending idle timeouts. 3027 removeTimeoutsForActivityLocked(r); 3028 if (getVisibleBehindActivity() == r) { 3029 mStackSupervisor.requestVisibleBehindLocked(r, false); 3030 } 3031 } 3032 3033 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3034 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3035 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3036 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3037 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3038 r.finishLaunchTickingLocked(); 3039 } 3040 3041 private void removeActivityFromHistoryLocked(ActivityRecord r) { 3042 mStackSupervisor.removeChildActivityContainers(r); 3043 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3044 r.makeFinishing(); 3045 if (DEBUG_ADD_REMOVE) { 3046 RuntimeException here = new RuntimeException("here"); 3047 here.fillInStackTrace(); 3048 Slog.i(TAG, "Removing activity " + r + " from stack"); 3049 } 3050 r.takeFromHistory(); 3051 removeTimeoutsForActivityLocked(r); 3052 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3053 r.state = ActivityState.DESTROYED; 3054 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3055 r.app = null; 3056 mWindowManager.removeAppToken(r.appToken); 3057 if (VALIDATE_TOKENS) { 3058 validateAppTokensLocked(); 3059 } 3060 final TaskRecord task = r.task; 3061 if (task != null && task.removeActivity(r)) { 3062 if (DEBUG_STACK) Slog.i(TAG, 3063 "removeActivityFromHistoryLocked: last activity removed from " + this); 3064 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3065 task.isOverHomeStack()) { 3066 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3067 } 3068 removeTask(task); 3069 } 3070 cleanUpActivityServicesLocked(r); 3071 r.removeUriPermissionsLocked(); 3072 } 3073 3074 /** 3075 * Perform clean-up of service connections in an activity record. 3076 */ 3077 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3078 // Throw away any services that have been bound by this activity. 3079 if (r.connections != null) { 3080 Iterator<ConnectionRecord> it = r.connections.iterator(); 3081 while (it.hasNext()) { 3082 ConnectionRecord c = it.next(); 3083 mService.mServices.removeConnectionLocked(c, null, r); 3084 } 3085 r.connections = null; 3086 } 3087 } 3088 3089 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3090 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3091 msg.obj = new ScheduleDestroyArgs(owner, reason); 3092 mHandler.sendMessage(msg); 3093 } 3094 3095 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3096 boolean lastIsOpaque = false; 3097 boolean activityRemoved = false; 3098 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3099 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3100 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3101 final ActivityRecord r = activities.get(activityNdx); 3102 if (r.finishing) { 3103 continue; 3104 } 3105 if (r.fullscreen) { 3106 lastIsOpaque = true; 3107 } 3108 if (owner != null && r.app != owner) { 3109 continue; 3110 } 3111 if (!lastIsOpaque) { 3112 continue; 3113 } 3114 if (r.isDestroyable()) { 3115 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3116 + " resumed=" + mResumedActivity 3117 + " pausing=" + mPausingActivity + " for reason " + reason); 3118 if (destroyActivityLocked(r, true, reason)) { 3119 activityRemoved = true; 3120 } 3121 } 3122 } 3123 } 3124 if (activityRemoved) { 3125 mStackSupervisor.resumeTopActivitiesLocked(); 3126 } 3127 } 3128 3129 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3130 if (r.isDestroyable()) { 3131 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3132 + " resumed=" + mResumedActivity 3133 + " pausing=" + mPausingActivity + " for reason " + reason); 3134 return destroyActivityLocked(r, true, reason); 3135 } 3136 return false; 3137 } 3138 3139 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3140 String reason) { 3141 // Iterate over tasks starting at the back (oldest) first. 3142 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3143 int maxTasks = tasks.size() / 4; 3144 if (maxTasks < 1) { 3145 maxTasks = 1; 3146 } 3147 int numReleased = 0; 3148 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3149 final TaskRecord task = mTaskHistory.get(taskNdx); 3150 if (!tasks.contains(task)) { 3151 continue; 3152 } 3153 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3154 int curNum = 0; 3155 final ArrayList<ActivityRecord> activities = task.mActivities; 3156 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3157 final ActivityRecord activity = activities.get(actNdx); 3158 if (activity.app == app && activity.isDestroyable()) { 3159 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3160 + " in state " + activity.state + " resumed=" + mResumedActivity 3161 + " pausing=" + mPausingActivity + " for reason " + reason); 3162 destroyActivityLocked(activity, true, reason); 3163 if (activities.get(actNdx) != activity) { 3164 // Was removed from list, back up so we don't miss the next one. 3165 actNdx--; 3166 } 3167 curNum++; 3168 } 3169 } 3170 if (curNum > 0) { 3171 numReleased += curNum; 3172 maxTasks--; 3173 if (mTaskHistory.get(taskNdx) != task) { 3174 // The entire task got removed, back up so we don't miss the next one. 3175 taskNdx--; 3176 } 3177 } 3178 } 3179 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3180 return numReleased; 3181 } 3182 3183 /** 3184 * Destroy the current CLIENT SIDE instance of an activity. This may be 3185 * called both when actually finishing an activity, or when performing 3186 * a configuration switch where we destroy the current client-side object 3187 * but then create a new client-side object for this same HistoryRecord. 3188 */ 3189 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3190 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3191 TAG, "Removing activity from " + reason + ": token=" + r 3192 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3193 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3194 r.userId, System.identityHashCode(r), 3195 r.task.taskId, r.shortComponentName, reason); 3196 3197 boolean removedFromHistory = false; 3198 3199 cleanUpActivityLocked(r, false, false); 3200 3201 final boolean hadApp = r.app != null; 3202 3203 if (hadApp) { 3204 if (removeFromApp) { 3205 r.app.activities.remove(r); 3206 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3207 mService.mHeavyWeightProcess = null; 3208 mService.mHandler.sendEmptyMessage( 3209 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3210 } 3211 if (r.app.activities.isEmpty()) { 3212 // Update any services we are bound to that might care about whether 3213 // their client may have activities. 3214 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3215 // No longer have activities, so update LRU list and oom adj. 3216 mService.updateLruProcessLocked(r.app, false, null); 3217 mService.updateOomAdjLocked(); 3218 } 3219 } 3220 3221 boolean skipDestroy = false; 3222 3223 try { 3224 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3225 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3226 r.configChangeFlags); 3227 } catch (Exception e) { 3228 // We can just ignore exceptions here... if the process 3229 // has crashed, our death notification will clean things 3230 // up. 3231 //Slog.w(TAG, "Exception thrown during finish", e); 3232 if (r.finishing) { 3233 removeActivityFromHistoryLocked(r); 3234 removedFromHistory = true; 3235 skipDestroy = true; 3236 } 3237 } 3238 3239 r.nowVisible = false; 3240 3241 // If the activity is finishing, we need to wait on removing it 3242 // from the list to give it a chance to do its cleanup. During 3243 // that time it may make calls back with its token so we need to 3244 // be able to find it on the list and so we don't want to remove 3245 // it from the list yet. Otherwise, we can just immediately put 3246 // it in the destroyed state since we are not removing it from the 3247 // list. 3248 if (r.finishing && !skipDestroy) { 3249 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3250 + " (destroy requested)"); 3251 r.state = ActivityState.DESTROYING; 3252 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3253 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3254 } else { 3255 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3256 r.state = ActivityState.DESTROYED; 3257 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3258 r.app = null; 3259 } 3260 } else { 3261 // remove this record from the history. 3262 if (r.finishing) { 3263 removeActivityFromHistoryLocked(r); 3264 removedFromHistory = true; 3265 } else { 3266 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3267 r.state = ActivityState.DESTROYED; 3268 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3269 r.app = null; 3270 } 3271 } 3272 3273 r.configChangeFlags = 0; 3274 3275 if (!mLRUActivities.remove(r) && hadApp) { 3276 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3277 } 3278 3279 return removedFromHistory; 3280 } 3281 3282 final void activityDestroyedLocked(IBinder token) { 3283 final long origId = Binder.clearCallingIdentity(); 3284 try { 3285 ActivityRecord r = ActivityRecord.forToken(token); 3286 if (r != null) { 3287 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3288 } 3289 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3290 3291 if (isInStackLocked(token) != null) { 3292 if (r.state == ActivityState.DESTROYING) { 3293 cleanUpActivityLocked(r, true, false); 3294 removeActivityFromHistoryLocked(r); 3295 } 3296 } 3297 mStackSupervisor.resumeTopActivitiesLocked(); 3298 } finally { 3299 Binder.restoreCallingIdentity(origId); 3300 } 3301 } 3302 3303 void releaseBackgroundResources() { 3304 if (hasVisibleBehindActivity() && 3305 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3306 final ActivityRecord r = getVisibleBehindActivity(); 3307 if (r == topRunningActivityLocked(null)) { 3308 // Don't release the top activity if it has requested to run behind the next 3309 // activity. 3310 return; 3311 } 3312 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3313 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3314 " thread=" + r.app.thread); 3315 if (r != null && r.app != null && r.app.thread != null) { 3316 try { 3317 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3318 } catch (RemoteException e) { 3319 } 3320 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3321 } else { 3322 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3323 backgroundResourcesReleased(r.appToken); 3324 } 3325 } 3326 } 3327 3328 final void backgroundResourcesReleased(IBinder token) { 3329 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3330 final ActivityRecord r = getVisibleBehindActivity(); 3331 if (r != null) { 3332 mStackSupervisor.mStoppingActivities.add(r); 3333 setVisibleBehindActivity(null); 3334 } 3335 mStackSupervisor.resumeTopActivitiesLocked(); 3336 } 3337 3338 boolean hasVisibleBehindActivity() { 3339 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3340 } 3341 3342 void setVisibleBehindActivity(ActivityRecord r) { 3343 if (isAttached()) { 3344 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3345 } 3346 } 3347 3348 ActivityRecord getVisibleBehindActivity() { 3349 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3350 } 3351 3352 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3353 ProcessRecord app, String listName) { 3354 int i = list.size(); 3355 if (DEBUG_CLEANUP) Slog.v( 3356 TAG, "Removing app " + app + " from list " + listName 3357 + " with " + i + " entries"); 3358 while (i > 0) { 3359 i--; 3360 ActivityRecord r = list.get(i); 3361 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3362 if (r.app == app) { 3363 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3364 list.remove(i); 3365 removeTimeoutsForActivityLocked(r); 3366 } 3367 } 3368 } 3369 3370 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3371 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3372 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3373 "mStoppingActivities"); 3374 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3375 "mGoingToSleepActivities"); 3376 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3377 "mWaitingVisibleActivities"); 3378 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3379 "mFinishingActivities"); 3380 3381 boolean hasVisibleActivities = false; 3382 3383 // Clean out the history list. 3384 int i = numActivities(); 3385 if (DEBUG_CLEANUP) Slog.v( 3386 TAG, "Removing app " + app + " from history with " + i + " entries"); 3387 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3388 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3389 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3390 final ActivityRecord r = activities.get(activityNdx); 3391 --i; 3392 if (DEBUG_CLEANUP) Slog.v( 3393 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3394 if (r.app == app) { 3395 boolean remove; 3396 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3397 // Don't currently have state for the activity, or 3398 // it is finishing -- always remove it. 3399 remove = true; 3400 } else if (r.launchCount > 2 && 3401 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3402 // We have launched this activity too many times since it was 3403 // able to run, so give up and remove it. 3404 remove = true; 3405 } else { 3406 // The process may be gone, but the activity lives on! 3407 remove = false; 3408 } 3409 if (remove) { 3410 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3411 RuntimeException here = new RuntimeException("here"); 3412 here.fillInStackTrace(); 3413 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3414 + ": haveState=" + r.haveState 3415 + " stateNotNeeded=" + r.stateNotNeeded 3416 + " finishing=" + r.finishing 3417 + " state=" + r.state, here); 3418 } 3419 if (!r.finishing) { 3420 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3421 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3422 r.userId, System.identityHashCode(r), 3423 r.task.taskId, r.shortComponentName, 3424 "proc died without state saved"); 3425 if (r.state == ActivityState.RESUMED) { 3426 mService.updateUsageStats(r, false); 3427 } 3428 } 3429 removeActivityFromHistoryLocked(r); 3430 3431 } else { 3432 // We have the current state for this activity, so 3433 // it can be restarted later when needed. 3434 if (localLOGV) Slog.v( 3435 TAG, "Keeping entry, setting app to null"); 3436 if (r.visible) { 3437 hasVisibleActivities = true; 3438 } 3439 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3440 + r); 3441 r.app = null; 3442 r.nowVisible = false; 3443 if (!r.haveState) { 3444 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3445 "App died, clearing saved state of " + r); 3446 r.icicle = null; 3447 } 3448 } 3449 3450 cleanUpActivityLocked(r, true, true); 3451 } 3452 } 3453 } 3454 3455 return hasVisibleActivities; 3456 } 3457 3458 final void updateTransitLocked(int transit, Bundle options) { 3459 if (options != null) { 3460 ActivityRecord r = topRunningActivityLocked(null); 3461 if (r != null && r.state != ActivityState.RESUMED) { 3462 r.updateOptionsLocked(options); 3463 } else { 3464 ActivityOptions.abort(options); 3465 } 3466 } 3467 mWindowManager.prepareAppTransition(transit, false); 3468 } 3469 3470 void updateTaskMovement(TaskRecord task, boolean toFront) { 3471 if (task.isPersistable) { 3472 task.mLastTimeMoved = System.currentTimeMillis(); 3473 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3474 // recently will be most negative, tasks sent to the bottom before that will be less 3475 // negative. Similarly for recent tasks moved to the top which will be most positive. 3476 if (!toFront) { 3477 task.mLastTimeMoved *= -1; 3478 } 3479 } 3480 } 3481 3482 void moveHomeStackTaskToTop(int homeStackTaskType) { 3483 final int top = mTaskHistory.size() - 1; 3484 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3485 final TaskRecord task = mTaskHistory.get(taskNdx); 3486 if (task.taskType == homeStackTaskType) { 3487 if (DEBUG_TASKS || DEBUG_STACK) 3488 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3489 mTaskHistory.remove(taskNdx); 3490 mTaskHistory.add(top, task); 3491 updateTaskMovement(task, true); 3492 mWindowManager.moveTaskToTop(task.taskId); 3493 return; 3494 } 3495 } 3496 } 3497 3498 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3499 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3500 3501 final int numTasks = mTaskHistory.size(); 3502 final int index = mTaskHistory.indexOf(tr); 3503 if (numTasks == 0 || index < 0) { 3504 // nothing to do! 3505 if (reason != null && 3506 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3507 ActivityOptions.abort(options); 3508 } else { 3509 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3510 } 3511 return; 3512 } 3513 3514 moveToFront(); 3515 3516 // Shift all activities with this task up to the top 3517 // of the stack, keeping them in the same internal order. 3518 insertTaskAtTop(tr); 3519 3520 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3521 if (reason != null && 3522 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3523 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3524 ActivityRecord r = topRunningActivityLocked(null); 3525 if (r != null) { 3526 mNoAnimActivities.add(r); 3527 } 3528 ActivityOptions.abort(options); 3529 } else { 3530 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3531 } 3532 3533 mWindowManager.moveTaskToTop(tr.taskId); 3534 3535 mStackSupervisor.resumeTopActivitiesLocked(); 3536 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3537 3538 if (VALIDATE_TOKENS) { 3539 validateAppTokensLocked(); 3540 } 3541 } 3542 3543 /** 3544 * Worker method for rearranging history stack. Implements the function of moving all 3545 * activities for a specific task (gathering them if disjoint) into a single group at the 3546 * bottom of the stack. 3547 * 3548 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3549 * to premeptively cancel the move. 3550 * 3551 * @param taskId The taskId to collect and move to the bottom. 3552 * @return Returns true if the move completed, false if not. 3553 */ 3554 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3555 final TaskRecord tr = taskForIdLocked(taskId); 3556 if (tr == null) { 3557 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3558 return false; 3559 } 3560 3561 Slog.i(TAG, "moveTaskToBack: " + tr); 3562 3563 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3564 3565 // If we have a watcher, preflight the move before committing to it. First check 3566 // for *other* available tasks, but if none are available, then try again allowing the 3567 // current task to be selected. 3568 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3569 ActivityRecord next = topRunningActivityLocked(null, taskId); 3570 if (next == null) { 3571 next = topRunningActivityLocked(null, 0); 3572 } 3573 if (next != null) { 3574 // ask watcher if this is allowed 3575 boolean moveOK = true; 3576 try { 3577 moveOK = mService.mController.activityResuming(next.packageName); 3578 } catch (RemoteException e) { 3579 mService.mController = null; 3580 Watchdog.getInstance().setActivityController(null); 3581 } 3582 if (!moveOK) { 3583 return false; 3584 } 3585 } 3586 } 3587 3588 if (DEBUG_TRANSITION) Slog.v(TAG, 3589 "Prepare to back transition: task=" + taskId); 3590 3591 mTaskHistory.remove(tr); 3592 mTaskHistory.add(0, tr); 3593 updateTaskMovement(tr, false); 3594 3595 // There is an assumption that moving a task to the back moves it behind the home activity. 3596 // We make sure here that some activity in the stack will launch home. 3597 int numTasks = mTaskHistory.size(); 3598 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3599 final TaskRecord task = mTaskHistory.get(taskNdx); 3600 if (task.isOverHomeStack()) { 3601 break; 3602 } 3603 if (taskNdx == 1) { 3604 // Set the last task before tr to go to home. 3605 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3606 } 3607 } 3608 3609 if (reason != null && 3610 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3611 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3612 ActivityRecord r = topRunningActivityLocked(null); 3613 if (r != null) { 3614 mNoAnimActivities.add(r); 3615 } 3616 } else { 3617 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3618 } 3619 mWindowManager.moveTaskToBottom(taskId); 3620 3621 if (VALIDATE_TOKENS) { 3622 validateAppTokensLocked(); 3623 } 3624 3625 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3626 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3627 if (!mService.mBooting && !mService.mBooted) { 3628 // Not ready yet! 3629 return false; 3630 } 3631 final int taskToReturnTo = tr.getTaskToReturnTo(); 3632 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3633 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3634 } 3635 3636 mStackSupervisor.resumeTopActivitiesLocked(); 3637 return true; 3638 } 3639 3640 static final void logStartActivity(int tag, ActivityRecord r, 3641 TaskRecord task) { 3642 final Uri data = r.intent.getData(); 3643 final String strData = data != null ? data.toSafeString() : null; 3644 3645 EventLog.writeEvent(tag, 3646 r.userId, System.identityHashCode(r), task.taskId, 3647 r.shortComponentName, r.intent.getAction(), 3648 r.intent.getType(), strData, r.intent.getFlags()); 3649 } 3650 3651 /** 3652 * Make sure the given activity matches the current configuration. Returns 3653 * false if the activity had to be destroyed. Returns true if the 3654 * configuration is the same, or the activity will remain running as-is 3655 * for whatever reason. Ensures the HistoryRecord is updated with the 3656 * correct configuration and all other bookkeeping is handled. 3657 */ 3658 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3659 int globalChanges) { 3660 if (mConfigWillChange) { 3661 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3662 "Skipping config check (will change): " + r); 3663 return true; 3664 } 3665 3666 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3667 "Ensuring correct configuration: " + r); 3668 3669 // Short circuit: if the two configurations are the exact same 3670 // object (the common case), then there is nothing to do. 3671 Configuration newConfig = mService.mConfiguration; 3672 if (r.configuration == newConfig && !r.forceNewConfig) { 3673 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3674 "Configuration unchanged in " + r); 3675 return true; 3676 } 3677 3678 // We don't worry about activities that are finishing. 3679 if (r.finishing) { 3680 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3681 "Configuration doesn't matter in finishing " + r); 3682 r.stopFreezingScreenLocked(false); 3683 return true; 3684 } 3685 3686 // Okay we now are going to make this activity have the new config. 3687 // But then we need to figure out how it needs to deal with that. 3688 Configuration oldConfig = r.configuration; 3689 r.configuration = newConfig; 3690 3691 // Determine what has changed. May be nothing, if this is a config 3692 // that has come back from the app after going idle. In that case 3693 // we just want to leave the official config object now in the 3694 // activity and do nothing else. 3695 final int changes = oldConfig.diff(newConfig); 3696 if (changes == 0 && !r.forceNewConfig) { 3697 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3698 "Configuration no differences in " + r); 3699 return true; 3700 } 3701 3702 // If the activity isn't currently running, just leave the new 3703 // configuration and it will pick that up next time it starts. 3704 if (r.app == null || r.app.thread == null) { 3705 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3706 "Configuration doesn't matter not running " + r); 3707 r.stopFreezingScreenLocked(false); 3708 r.forceNewConfig = false; 3709 return true; 3710 } 3711 3712 // Figure out how to handle the changes between the configurations. 3713 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3714 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3715 + Integer.toHexString(changes) + ", handles=0x" 3716 + Integer.toHexString(r.info.getRealConfigChanged()) 3717 + ", newConfig=" + newConfig); 3718 } 3719 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3720 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3721 r.configChangeFlags |= changes; 3722 r.startFreezingScreenLocked(r.app, globalChanges); 3723 r.forceNewConfig = false; 3724 if (r.app == null || r.app.thread == null) { 3725 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3726 "Config is destroying non-running " + r); 3727 destroyActivityLocked(r, true, "config"); 3728 } else if (r.state == ActivityState.PAUSING) { 3729 // A little annoying: we are waiting for this activity to 3730 // finish pausing. Let's not do anything now, but just 3731 // flag that it needs to be restarted when done pausing. 3732 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3733 "Config is skipping already pausing " + r); 3734 r.configDestroy = true; 3735 return true; 3736 } else if (r.state == ActivityState.RESUMED) { 3737 // Try to optimize this case: the configuration is changing 3738 // and we need to restart the top, resumed activity. 3739 // Instead of doing the normal handshaking, just say 3740 // "restart!". 3741 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3742 "Config is relaunching resumed " + r); 3743 relaunchActivityLocked(r, r.configChangeFlags, true); 3744 r.configChangeFlags = 0; 3745 } else { 3746 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3747 "Config is relaunching non-resumed " + r); 3748 relaunchActivityLocked(r, r.configChangeFlags, false); 3749 r.configChangeFlags = 0; 3750 } 3751 3752 // All done... tell the caller we weren't able to keep this 3753 // activity around. 3754 return false; 3755 } 3756 3757 // Default case: the activity can handle this new configuration, so 3758 // hand it over. Note that we don't need to give it the new 3759 // configuration, since we always send configuration changes to all 3760 // process when they happen so it can just use whatever configuration 3761 // it last got. 3762 if (r.app != null && r.app.thread != null) { 3763 try { 3764 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3765 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3766 } catch (RemoteException e) { 3767 // If process died, whatever. 3768 } 3769 } 3770 r.stopFreezingScreenLocked(false); 3771 3772 return true; 3773 } 3774 3775 private boolean relaunchActivityLocked(ActivityRecord r, 3776 int changes, boolean andResume) { 3777 List<ResultInfo> results = null; 3778 List<ReferrerIntent> newIntents = null; 3779 if (andResume) { 3780 results = r.results; 3781 newIntents = r.newIntents; 3782 } 3783 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3784 + " with results=" + results + " newIntents=" + newIntents 3785 + " andResume=" + andResume); 3786 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3787 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3788 r.task.taskId, r.shortComponentName); 3789 3790 r.startFreezingScreenLocked(r.app, 0); 3791 3792 mStackSupervisor.removeChildActivityContainers(r); 3793 3794 try { 3795 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3796 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3797 + r); 3798 r.forceNewConfig = false; 3799 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3800 changes, !andResume, new Configuration(mService.mConfiguration)); 3801 // Note: don't need to call pauseIfSleepingLocked() here, because 3802 // the caller will only pass in 'andResume' if this activity is 3803 // currently resumed, which implies we aren't sleeping. 3804 } catch (RemoteException e) { 3805 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3806 } 3807 3808 if (andResume) { 3809 r.results = null; 3810 r.newIntents = null; 3811 r.state = ActivityState.RESUMED; 3812 } else { 3813 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3814 r.state = ActivityState.PAUSED; 3815 } 3816 3817 return true; 3818 } 3819 3820 boolean willActivityBeVisibleLocked(IBinder token) { 3821 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3822 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3823 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3824 final ActivityRecord r = activities.get(activityNdx); 3825 if (r.appToken == token) { 3826 return true; 3827 } 3828 if (r.fullscreen && !r.finishing) { 3829 return false; 3830 } 3831 } 3832 } 3833 final ActivityRecord r = ActivityRecord.forToken(token); 3834 if (r == null) { 3835 return false; 3836 } 3837 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3838 + " would have returned true for r=" + r); 3839 return !r.finishing; 3840 } 3841 3842 void closeSystemDialogsLocked() { 3843 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3844 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3845 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3846 final ActivityRecord r = activities.get(activityNdx); 3847 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3848 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3849 } 3850 } 3851 } 3852 } 3853 3854 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3855 boolean didSomething = false; 3856 TaskRecord lastTask = null; 3857 ComponentName homeActivity = null; 3858 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3859 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3860 int numActivities = activities.size(); 3861 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3862 ActivityRecord r = activities.get(activityNdx); 3863 final boolean samePackage = r.packageName.equals(name) 3864 || (name == null && r.userId == userId); 3865 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3866 && (samePackage || r.task == lastTask) 3867 && (r.app == null || evenPersistent || !r.app.persistent)) { 3868 if (!doit) { 3869 if (r.finishing) { 3870 // If this activity is just finishing, then it is not 3871 // interesting as far as something to stop. 3872 continue; 3873 } 3874 return true; 3875 } 3876 if (r.isHomeActivity()) { 3877 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3878 Slog.i(TAG, "Skip force-stop again " + r); 3879 continue; 3880 } else { 3881 homeActivity = r.realActivity; 3882 } 3883 } 3884 didSomething = true; 3885 Slog.i(TAG, " Force finishing activity " + r); 3886 if (samePackage) { 3887 if (r.app != null) { 3888 r.app.removed = true; 3889 } 3890 r.app = null; 3891 } 3892 lastTask = r.task; 3893 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3894 true)) { 3895 // r has been deleted from mActivities, accommodate. 3896 --numActivities; 3897 --activityNdx; 3898 } 3899 } 3900 } 3901 } 3902 return didSomething; 3903 } 3904 3905 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3906 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3907 final TaskRecord task = mTaskHistory.get(taskNdx); 3908 ActivityRecord r = null; 3909 ActivityRecord top = null; 3910 int numActivities = 0; 3911 int numRunning = 0; 3912 final ArrayList<ActivityRecord> activities = task.mActivities; 3913 if (activities.isEmpty()) { 3914 continue; 3915 } 3916 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3917 continue; 3918 } 3919 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3920 r = activities.get(activityNdx); 3921 3922 // Initialize state for next task if needed. 3923 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3924 top = r; 3925 numActivities = numRunning = 0; 3926 } 3927 3928 // Add 'r' into the current task. 3929 numActivities++; 3930 if (r.app != null && r.app.thread != null) { 3931 numRunning++; 3932 } 3933 3934 if (localLOGV) Slog.v( 3935 TAG, r.intent.getComponent().flattenToShortString() 3936 + ": task=" + r.task); 3937 } 3938 3939 RunningTaskInfo ci = new RunningTaskInfo(); 3940 ci.id = task.taskId; 3941 ci.baseActivity = r.intent.getComponent(); 3942 ci.topActivity = top.intent.getComponent(); 3943 ci.lastActiveTime = task.lastActiveTime; 3944 3945 if (top.task != null) { 3946 ci.description = top.task.lastDescription; 3947 } 3948 ci.numActivities = numActivities; 3949 ci.numRunning = numRunning; 3950 //System.out.println( 3951 // "#" + maxNum + ": " + " descr=" + ci.description); 3952 list.add(ci); 3953 } 3954 } 3955 3956 public void unhandledBackLocked() { 3957 final int top = mTaskHistory.size() - 1; 3958 if (DEBUG_SWITCH) Slog.d( 3959 TAG, "Performing unhandledBack(): top activity at " + top); 3960 if (top >= 0) { 3961 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3962 int activityTop = activities.size() - 1; 3963 if (activityTop > 0) { 3964 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3965 "unhandled-back", true); 3966 } 3967 } 3968 } 3969 3970 /** 3971 * Reset local parameters because an app's activity died. 3972 * @param app The app of the activity that died. 3973 * @return result from removeHistoryRecordsForAppLocked. 3974 */ 3975 boolean handleAppDiedLocked(ProcessRecord app) { 3976 if (mPausingActivity != null && mPausingActivity.app == app) { 3977 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3978 "App died while pausing: " + mPausingActivity); 3979 mPausingActivity = null; 3980 } 3981 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3982 mLastPausedActivity = null; 3983 mLastNoHistoryActivity = null; 3984 } 3985 3986 return removeHistoryRecordsForAppLocked(app); 3987 } 3988 3989 void handleAppCrashLocked(ProcessRecord app) { 3990 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3991 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3992 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3993 final ActivityRecord r = activities.get(activityNdx); 3994 if (r.app == app) { 3995 Slog.w(TAG, " Force finishing activity " 3996 + r.intent.getComponent().flattenToShortString()); 3997 // Force the destroy to skip right to removal. 3998 r.app = null; 3999 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4000 } 4001 } 4002 } 4003 } 4004 4005 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4006 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4007 boolean printed = false; 4008 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4009 final TaskRecord task = mTaskHistory.get(taskNdx); 4010 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4011 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4012 dumpClient, dumpPackage, needSep, header, 4013 " Task id #" + task.taskId); 4014 if (printed) { 4015 header = null; 4016 } 4017 } 4018 return printed; 4019 } 4020 4021 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4022 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4023 4024 if ("all".equals(name)) { 4025 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4026 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4027 } 4028 } else if ("top".equals(name)) { 4029 final int top = mTaskHistory.size() - 1; 4030 if (top >= 0) { 4031 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4032 int listTop = list.size() - 1; 4033 if (listTop >= 0) { 4034 activities.add(list.get(listTop)); 4035 } 4036 } 4037 } else { 4038 ItemMatcher matcher = new ItemMatcher(); 4039 matcher.build(name); 4040 4041 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4042 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4043 if (matcher.match(r1, r1.intent.getComponent())) { 4044 activities.add(r1); 4045 } 4046 } 4047 } 4048 } 4049 4050 return activities; 4051 } 4052 4053 ActivityRecord restartPackage(String packageName) { 4054 ActivityRecord starting = topRunningActivityLocked(null); 4055 4056 // All activities that came from the package must be 4057 // restarted as if there was a config change. 4058 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4059 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4060 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4061 final ActivityRecord a = activities.get(activityNdx); 4062 if (a.info.packageName.equals(packageName)) { 4063 a.forceNewConfig = true; 4064 if (starting != null && a == starting && a.visible) { 4065 a.startFreezingScreenLocked(starting.app, 4066 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4067 } 4068 } 4069 } 4070 } 4071 4072 return starting; 4073 } 4074 4075 void removeTask(TaskRecord task) { 4076 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4077 mWindowManager.removeTask(task.taskId); 4078 final ActivityRecord r = mResumedActivity; 4079 if (r != null && r.task == task) { 4080 mResumedActivity = null; 4081 } 4082 4083 final int taskNdx = mTaskHistory.indexOf(task); 4084 final int topTaskNdx = mTaskHistory.size() - 1; 4085 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4086 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4087 if (!nextTask.isOverHomeStack()) { 4088 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4089 } 4090 } 4091 mTaskHistory.remove(task); 4092 updateTaskMovement(task, true); 4093 4094 if (task.mActivities.isEmpty()) { 4095 final boolean isVoiceSession = task.voiceSession != null; 4096 if (isVoiceSession) { 4097 try { 4098 task.voiceSession.taskFinished(task.intent, task.taskId); 4099 } catch (RemoteException e) { 4100 } 4101 } 4102 if (task.autoRemoveFromRecents() || isVoiceSession) { 4103 // Task creator asked to remove this when done, or this task was a voice 4104 // interaction, so it should not remain on the recent tasks list. 4105 mService.mRecentTasks.remove(task); 4106 task.removedFromRecents(mService.mTaskPersister); 4107 } 4108 } 4109 4110 if (mTaskHistory.isEmpty()) { 4111 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4112 if (isOnHomeDisplay()) { 4113 mStackSupervisor.moveHomeStack(!isHomeStack()); 4114 } 4115 if (mStacks != null) { 4116 mStacks.remove(this); 4117 mStacks.add(0, this); 4118 } 4119 mActivityContainer.onTaskListEmptyLocked(); 4120 } 4121 } 4122 4123 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4124 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4125 boolean toTop) { 4126 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4127 voiceInteractor); 4128 addTask(task, toTop, false); 4129 return task; 4130 } 4131 4132 ArrayList<TaskRecord> getAllTasks() { 4133 return new ArrayList<TaskRecord>(mTaskHistory); 4134 } 4135 4136 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4137 task.stack = this; 4138 if (toTop) { 4139 insertTaskAtTop(task); 4140 } else { 4141 mTaskHistory.add(0, task); 4142 updateTaskMovement(task, false); 4143 } 4144 if (!moving && task.voiceSession != null) { 4145 try { 4146 task.voiceSession.taskStarted(task.intent, task.taskId); 4147 } catch (RemoteException e) { 4148 } 4149 } 4150 } 4151 4152 public int getStackId() { 4153 return mStackId; 4154 } 4155 4156 @Override 4157 public String toString() { 4158 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4159 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4160 } 4161} 4162