ActivityStack.java revision 88176107476644765cc59b84976598d581e1fc3f
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.ActivityStackSupervisor.DEBUG_ADD_REMOVE; 34import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP; 35import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 36import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 37import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 38 39import android.os.Trace; 40import com.android.internal.os.BatteryStatsImpl; 41import com.android.internal.util.Objects; 42import com.android.server.Watchdog; 43import com.android.server.am.ActivityManagerService.ItemMatcher; 44import com.android.server.wm.AppTransition; 45import com.android.server.wm.TaskGroup; 46import com.android.server.wm.WindowManagerService; 47 48import android.app.Activity; 49import android.app.ActivityManager; 50import android.app.ActivityOptions; 51import android.app.AppGlobals; 52import android.app.IActivityController; 53import android.app.IThumbnailReceiver; 54import android.app.ResultInfo; 55import android.app.ActivityManager.RunningTaskInfo; 56import android.content.ComponentName; 57import android.content.Context; 58import android.content.Intent; 59import android.content.pm.ActivityInfo; 60import android.content.pm.PackageManager; 61import android.content.res.Configuration; 62import android.content.res.Resources; 63import android.graphics.Bitmap; 64import android.graphics.Bitmap.Config; 65import android.net.Uri; 66import android.os.Binder; 67import android.os.Bundle; 68import android.os.Handler; 69import android.os.IBinder; 70import android.os.Looper; 71import android.os.Message; 72import android.os.PowerManager; 73import android.os.RemoteException; 74import android.os.SystemClock; 75import android.os.UserHandle; 76import android.util.EventLog; 77import android.util.Slog; 78import android.view.Display; 79 80import java.io.FileDescriptor; 81import java.io.PrintWriter; 82import java.lang.ref.WeakReference; 83import java.util.ArrayList; 84import java.util.Iterator; 85import java.util.List; 86 87/** 88 * State and management of a single stack of activities. 89 */ 90final class ActivityStack { 91 92 // Ticks during which we check progress while waiting for an app to launch. 93 static final int LAUNCH_TICK = 500; 94 95 // How long we wait until giving up on the last activity to pause. This 96 // is short because it directly impacts the responsiveness of starting the 97 // next activity. 98 static final int PAUSE_TIMEOUT = 500; 99 100 // How long we wait for the activity to tell us it has stopped before 101 // giving up. This is a good amount of time because we really need this 102 // from the application in order to get its saved state. 103 static final int STOP_TIMEOUT = 10*1000; 104 105 // How long we wait until giving up on an activity telling us it has 106 // finished destroying itself. 107 static final int DESTROY_TIMEOUT = 10*1000; 108 109 // How long until we reset a task when the user returns to it. Currently 110 // disabled. 111 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 112 113 // How long between activity launches that we consider safe to not warn 114 // the user about an unexpected activity being launched on top. 115 static final long START_WARN_TIME = 5*1000; 116 117 // Set to false to disable the preview that is shown while a new activity 118 // is being started. 119 static final boolean SHOW_APP_STARTING_PREVIEW = true; 120 121 // How long to wait for all background Activities to redraw following a call to 122 // convertToTranslucent(). 123 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 124 125 enum ActivityState { 126 INITIALIZING, 127 RESUMED, 128 PAUSING, 129 PAUSED, 130 STOPPING, 131 STOPPED, 132 FINISHING, 133 DESTROYING, 134 DESTROYED 135 } 136 137 final ActivityManagerService mService; 138 final WindowManagerService mWindowManager; 139 140 final Context mContext; 141 142 /** 143 * The back history of all previous (and possibly still 144 * running) activities. It contains #TaskRecord objects. 145 */ 146 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 147 148 /** 149 * Used for validating app tokens with window manager. 150 */ 151 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 152 153 /** 154 * List of running activities, sorted by recent usage. 155 * The first entry in the list is the least recently used. 156 * It contains HistoryRecord objects. 157 */ 158 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 159 160 /** 161 * Animations that for the current transition have requested not to 162 * be considered for the transition animation. 163 */ 164 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 165 166 /** 167 * When we are in the process of pausing an activity, before starting the 168 * next one, this variable holds the activity that is currently being paused. 169 */ 170 ActivityRecord mPausingActivity = null; 171 172 /** 173 * This is the last activity that we put into the paused state. This is 174 * used to determine if we need to do an activity transition while sleeping, 175 * when we normally hold the top activity paused. 176 */ 177 ActivityRecord mLastPausedActivity = null; 178 179 /** 180 * Current activity that is resumed, or null if there is none. 181 */ 182 ActivityRecord mResumedActivity = null; 183 184 /** 185 * This is the last activity that has been started. It is only used to 186 * identify when multiple activities are started at once so that the user 187 * can be warned they may not be in the activity they think they are. 188 */ 189 ActivityRecord mLastStartedActivity = null; 190 191 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 192 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 193 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 194 // Activity in mTranslucentActivityWaiting is notified via 195 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 196 // background activity being drawn then the same call will be made with a true value. 197 ActivityRecord mTranslucentActivityWaiting = null; 198 ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 199 new ArrayList<ActivityRecord>(); 200 201 /** 202 * Set when we know we are going to be calling updateConfiguration() 203 * soon, so want to skip intermediate config checks. 204 */ 205 boolean mConfigWillChange; 206 207 long mLaunchStartTime = 0; 208 long mFullyDrawnStartTime = 0; 209 210 /** 211 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 212 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 213 */ 214 private ActivityRecord mLastScreenshotActivity = null; 215 private Bitmap mLastScreenshotBitmap = null; 216 217 int mThumbnailWidth = -1; 218 int mThumbnailHeight = -1; 219 220 int mCurrentUser; 221 222 final int mStackId; 223 224 /** Run all ActivityStacks through this */ 225 final ActivityStackSupervisor mStackSupervisor; 226 227 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 228 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 229 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 230 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 231 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 232 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 233 234 static class ScheduleDestroyArgs { 235 final ProcessRecord mOwner; 236 final boolean mOomAdj; 237 final String mReason; 238 ScheduleDestroyArgs(ProcessRecord owner, boolean oomAdj, String reason) { 239 mOwner = owner; 240 mOomAdj = oomAdj; 241 mReason = reason; 242 } 243 } 244 245 final Handler mHandler; 246 247 final class ActivityStackHandler extends Handler { 248 //public Handler() { 249 // if (localLOGV) Slog.v(TAG, "Handler started!"); 250 //} 251 public ActivityStackHandler(Looper looper) { 252 super(looper); 253 } 254 255 @Override 256 public void handleMessage(Message msg) { 257 switch (msg.what) { 258 case PAUSE_TIMEOUT_MSG: { 259 ActivityRecord r = (ActivityRecord)msg.obj; 260 // We don't at this point know if the activity is fullscreen, 261 // so we need to be conservative and assume it isn't. 262 Slog.w(TAG, "Activity pause timeout for " + r); 263 synchronized (mService) { 264 if (r.app != null) { 265 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 266 } 267 activityPausedLocked(r.appToken, true); 268 } 269 } break; 270 case LAUNCH_TICK_MSG: { 271 ActivityRecord r = (ActivityRecord)msg.obj; 272 synchronized (mService) { 273 if (r.continueLaunchTickingLocked()) { 274 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 275 } 276 } 277 } break; 278 case DESTROY_TIMEOUT_MSG: { 279 ActivityRecord r = (ActivityRecord)msg.obj; 280 // We don't at this point know if the activity is fullscreen, 281 // so we need to be conservative and assume it isn't. 282 Slog.w(TAG, "Activity destroy timeout for " + r); 283 synchronized (mService) { 284 activityDestroyedLocked(r != null ? r.appToken : null); 285 } 286 } break; 287 case STOP_TIMEOUT_MSG: { 288 ActivityRecord r = (ActivityRecord)msg.obj; 289 // We don't at this point know if the activity is fullscreen, 290 // so we need to be conservative and assume it isn't. 291 Slog.w(TAG, "Activity stop timeout for " + r); 292 synchronized (mService) { 293 if (r.isInHistory()) { 294 activityStoppedLocked(r, null, null, null); 295 } 296 } 297 } break; 298 case DESTROY_ACTIVITIES_MSG: { 299 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 300 synchronized (mService) { 301 destroyActivitiesLocked(args.mOwner, args.mOomAdj, args.mReason); 302 } 303 } break; 304 case TRANSLUCENT_TIMEOUT_MSG: { 305 synchronized (mService) { 306 notifyActivityDrawnLocked(null); 307 } 308 } break; 309 } 310 } 311 } 312 313 private int numActivities() { 314 int count = 0; 315 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 316 count += mTaskHistory.get(taskNdx).mActivities.size(); 317 } 318 return count; 319 } 320 321 ActivityStack(ActivityManagerService service, Context context, Looper looper, int stackId) { 322 mHandler = new ActivityStackHandler(looper); 323 mService = service; 324 mWindowManager = service.mWindowManager; 325 mStackSupervisor = service.mStackSupervisor; 326 mContext = context; 327 PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); 328 mStackId = stackId; 329 mCurrentUser = service.mCurrentUserId; 330 } 331 332 private boolean okToShow(ActivityRecord r) { 333 return r.userId == mCurrentUser 334 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 335 } 336 337 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 338 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 339 final TaskRecord task = mTaskHistory.get(taskNdx); 340 final ArrayList<ActivityRecord> activities = task.mActivities; 341 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 342 ActivityRecord r = activities.get(activityNdx); 343 if (!r.finishing && r != notTop && okToShow(r)) { 344 return r; 345 } 346 } 347 } 348 return null; 349 } 350 351 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 352 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 353 final TaskRecord task = mTaskHistory.get(taskNdx); 354 final ArrayList<ActivityRecord> activities = task.mActivities; 355 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 356 ActivityRecord r = activities.get(activityNdx); 357 if (!r.finishing && !r.delayedResume && r != notTop && okToShow(r)) { 358 return r; 359 } 360 } 361 } 362 return null; 363 } 364 365 /** 366 * This is a simplified version of topRunningActivityLocked that provides a number of 367 * optional skip-over modes. It is intended for use with the ActivityController hook only. 368 * 369 * @param token If non-null, any history records matching this token will be skipped. 370 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 371 * 372 * @return Returns the HistoryRecord of the next activity on the stack. 373 */ 374 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 375 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 376 TaskRecord task = mTaskHistory.get(taskNdx); 377 if (task.taskId == taskId) { 378 continue; 379 } 380 ArrayList<ActivityRecord> activities = task.mActivities; 381 for (int i = activities.size() - 1; i >= 0; --i) { 382 final ActivityRecord r = activities.get(i); 383 // Note: the taskId check depends on real taskId fields being non-zero 384 if (!r.finishing && (token != r.appToken) && okToShow(r)) { 385 return r; 386 } 387 } 388 } 389 return null; 390 } 391 392 final ActivityRecord topActivity() { 393 // Iterate to find the first non-empty task stack. Note that this code can 394 // be simplified once we stop storing tasks with empty mActivities lists. 395 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 396 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 397 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 398 return activities.get(activityNdx); 399 } 400 } 401 return null; 402 } 403 404 final TaskRecord topTask() { 405 final int size = mTaskHistory.size(); 406 if (size > 0) { 407 return mTaskHistory.get(size - 1); 408 } 409 return null; 410 } 411 412 TaskRecord taskForIdLocked(int id) { 413 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 414 final TaskRecord task = mTaskHistory.get(taskNdx); 415 if (task.taskId == id) { 416 return task; 417 } 418 } 419 return null; 420 } 421 422 ActivityRecord isInStackLocked(IBinder token) { 423 final ActivityRecord r = ActivityRecord.forToken(token); 424 if (r != null) { 425 final TaskRecord task = r.task; 426 if (task.mActivities.contains(r) && mTaskHistory.contains(task)) { 427 if (task.stack != this) Slog.w(TAG, 428 "Illegal state! task does not point to stack it is in."); 429 return r; 430 } 431 } 432 return null; 433 } 434 435 boolean containsApp(ProcessRecord app) { 436 if (app == null) { 437 return false; 438 } 439 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 440 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 441 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 442 final ActivityRecord r = activities.get(activityNdx); 443 if (r.finishing) { 444 continue; 445 } 446 if (r.app == app) { 447 return true; 448 } 449 } 450 } 451 return false; 452 } 453 454 final boolean updateLRUListLocked(ActivityRecord r) { 455 final boolean hadit = mLRUActivities.remove(r); 456 mLRUActivities.add(r); 457 return hadit; 458 } 459 460 final boolean isHomeStack() { 461 return mStackId == HOME_STACK_ID; 462 } 463 464 /** 465 * Returns the top activity in any existing task matching the given 466 * Intent. Returns null if no such task is found. 467 */ 468 ActivityRecord findTaskLocked(ActivityRecord target) { 469 Intent intent = target.intent; 470 ActivityInfo info = target.info; 471 ComponentName cls = intent.getComponent(); 472 if (info.targetActivity != null) { 473 cls = new ComponentName(info.packageName, info.targetActivity); 474 } 475 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 476 477 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 478 final TaskRecord task = mTaskHistory.get(taskNdx); 479 if (task.userId != userId) { 480 // Looking for a different task. 481 continue; 482 } 483 final ActivityRecord r = task.getTopActivity(); 484 if (r == null || r.finishing || r.userId != userId || 485 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 486 continue; 487 } 488 489 //Slog.i(TAG, "Comparing existing cls=" + r.task.intent.getComponent().flattenToShortString() 490 // + "/aff=" + r.task.affinity + " to new cls=" 491 // + intent.getComponent().flattenToShortString() + "/aff=" + taskAffinity); 492 if (task.affinity != null) { 493 if (task.affinity.equals(info.taskAffinity)) { 494 //Slog.i(TAG, "Found matching affinity!"); 495 return r; 496 } 497 } else if (task.intent != null && task.intent.getComponent().equals(cls)) { 498 //Slog.i(TAG, "Found matching class!"); 499 //dump(); 500 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 501 return r; 502 } else if (task.affinityIntent != null 503 && task.affinityIntent.getComponent().equals(cls)) { 504 //Slog.i(TAG, "Found matching class!"); 505 //dump(); 506 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 507 return r; 508 } 509 } 510 511 return null; 512 } 513 514 /** 515 * Returns the first activity (starting from the top of the stack) that 516 * is the same as the given activity. Returns null if no such activity 517 * is found. 518 */ 519 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 520 ComponentName cls = intent.getComponent(); 521 if (info.targetActivity != null) { 522 cls = new ComponentName(info.packageName, info.targetActivity); 523 } 524 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 525 526 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 527 TaskRecord task = mTaskHistory.get(taskNdx); 528 if (task.userId != mCurrentUser) { 529 return null; 530 } 531 final ArrayList<ActivityRecord> activities = task.mActivities; 532 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 533 ActivityRecord r = activities.get(activityNdx); 534 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 535 //Slog.i(TAG, "Found matching class!"); 536 //dump(); 537 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 538 return r; 539 } 540 } 541 } 542 543 return null; 544 } 545 546 /* 547 * Move the activities around in the stack to bring a user to the foreground. 548 * @return whether there are any activities for the specified user. 549 */ 550 final boolean switchUserLocked(int userId) { 551 if (VALIDATE_TOKENS) { 552 validateAppTokensLocked(); 553 } 554 if (mCurrentUser == userId) { 555 return true; 556 } 557 mCurrentUser = userId; 558 559 // Move userId's tasks to the top. 560 boolean haveActivities = false; 561 int index = mTaskHistory.size(); 562 for (int i = 0; i < index; ++i) { 563 TaskRecord task = mTaskHistory.get(i); 564 if (task.userId == userId) { 565 haveActivities = true; 566 mTaskHistory.remove(i); 567 mTaskHistory.add(task); 568 --index; 569 } 570 } 571 572 return haveActivities; 573 } 574 575 void minimalResumeActivityLocked(ActivityRecord r) { 576 r.state = ActivityState.RESUMED; 577 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 578 + " (starting new instance)"); 579 r.stopped = false; 580 mResumedActivity = r; 581 r.task.touchActiveTime(); 582 mService.addRecentTaskLocked(r.task); 583 completeResumeLocked(r); 584 mStackSupervisor.checkReadyForSleepLocked(); 585 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 586 } 587 588 private void startLaunchTraces() { 589 if (mFullyDrawnStartTime != 0) { 590 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 591 } 592 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 593 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 594 } 595 596 private void stopFullyDrawnTraceIfNeeded() { 597 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 598 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 599 mFullyDrawnStartTime = 0; 600 } 601 } 602 603 void setLaunchTime(ActivityRecord r) { 604 if (r.displayStartTime == 0) { 605 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 606 if (mLaunchStartTime == 0) { 607 startLaunchTraces(); 608 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 609 } 610 } else if (mLaunchStartTime == 0) { 611 startLaunchTraces(); 612 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 613 } 614 } 615 616 void clearLaunchTime(ActivityRecord r) { 617 r.displayStartTime = r.fullyDrawnStartTime = 0; 618 } 619 620 void awakeFromSleepingLocked() { 621 // Ensure activities are no longer sleeping. 622 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 623 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 624 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 625 activities.get(activityNdx).setSleeping(false); 626 } 627 } 628 } 629 630 /** 631 * @return true if something must be done before going to sleep. 632 */ 633 boolean checkReadyForSleepLocked() { 634 if (mResumedActivity != null) { 635 // Still have something resumed; can't sleep until it is paused. 636 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 637 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 638 startPausingLocked(false, true); 639 return true; 640 } 641 if (mPausingActivity != null) { 642 // Still waiting for something to pause; can't sleep yet. 643 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 644 return true; 645 } 646 647 return false; 648 } 649 650 void goToSleep() { 651 ensureActivitiesVisibleLocked(null, 0); 652 653 // Make sure any stopped but visible activities are now sleeping. 654 // This ensures that the activity's onStop() is called. 655 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 656 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 657 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 658 final ActivityRecord r = activities.get(activityNdx); 659 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 660 r.setSleeping(true); 661 } 662 } 663 } 664 } 665 666 public final Bitmap screenshotActivities(ActivityRecord who) { 667 if (who.noDisplay) { 668 return null; 669 } 670 671 Resources res = mService.mContext.getResources(); 672 int w = mThumbnailWidth; 673 int h = mThumbnailHeight; 674 if (w < 0) { 675 mThumbnailWidth = w = 676 res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_width); 677 mThumbnailHeight = h = 678 res.getDimensionPixelSize(com.android.internal.R.dimen.thumbnail_height); 679 } 680 681 if (w > 0) { 682 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 683 || mLastScreenshotBitmap.getWidth() != w 684 || mLastScreenshotBitmap.getHeight() != h) { 685 mLastScreenshotActivity = who; 686 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 687 who.appToken, Display.DEFAULT_DISPLAY, w, h); 688 } 689 if (mLastScreenshotBitmap != null) { 690 return mLastScreenshotBitmap.copy(Config.ARGB_8888, true); 691 } 692 } 693 return null; 694 } 695 696 final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { 697 if (mPausingActivity != null) { 698 Slog.e(TAG, "Trying to pause when pause is already pending for " 699 + mPausingActivity, new RuntimeException("here").fillInStackTrace()); 700 } 701 ActivityRecord prev = mResumedActivity; 702 if (prev == null) { 703 Slog.e(TAG, "Trying to pause when nothing is resumed", 704 new RuntimeException("here").fillInStackTrace()); 705 mStackSupervisor.resumeTopActivitiesLocked(); 706 return; 707 } 708 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 709 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 710 mResumedActivity = null; 711 mPausingActivity = prev; 712 mLastPausedActivity = prev; 713 prev.state = ActivityState.PAUSING; 714 prev.task.touchActiveTime(); 715 clearLaunchTime(prev); 716 prev.updateThumbnail(screenshotActivities(prev), null); 717 stopFullyDrawnTraceIfNeeded(); 718 719 mService.updateCpuStats(); 720 721 if (prev.app != null && prev.app.thread != null) { 722 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 723 try { 724 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 725 prev.userId, System.identityHashCode(prev), 726 prev.shortComponentName); 727 mService.updateUsageStats(prev, false); 728 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 729 userLeaving, prev.configChangeFlags); 730 } catch (Exception e) { 731 // Ignore exception, if process died other code will cleanup. 732 Slog.w(TAG, "Exception thrown during pause", e); 733 mPausingActivity = null; 734 mLastPausedActivity = null; 735 } 736 } else { 737 mPausingActivity = null; 738 mLastPausedActivity = null; 739 } 740 741 // If we are not going to sleep, we want to ensure the device is 742 // awake until the next activity is started. 743 if (!mService.isSleepingOrShuttingDown()) { 744 mStackSupervisor.acquireLaunchWakelock(); 745 } 746 747 if (mPausingActivity != null) { 748 // Have the window manager pause its key dispatching until the new 749 // activity has started. If we're pausing the activity just because 750 // the screen is being turned off and the UI is sleeping, don't interrupt 751 // key dispatch; the same activity will pick it up again on wakeup. 752 if (!uiSleeping) { 753 prev.pauseKeyDispatchingLocked(); 754 } else { 755 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 756 } 757 758 // Schedule a pause timeout in case the app doesn't respond. 759 // We don't give it much time because this directly impacts the 760 // responsiveness seen by the user. 761 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 762 msg.obj = prev; 763 prev.pauseTime = SystemClock.uptimeMillis(); 764 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 765 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 766 } else { 767 // This activity failed to schedule the 768 // pause, so just treat it as being paused now. 769 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 770 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 771 } 772 } 773 774 final void activityPausedLocked(IBinder token, boolean timeout) { 775 if (DEBUG_PAUSE) Slog.v( 776 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 777 778 final ActivityRecord r = isInStackLocked(token); 779 if (r != null) { 780 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 781 if (mPausingActivity == r) { 782 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 783 + (timeout ? " (due to timeout)" : " (pause complete)")); 784 r.state = ActivityState.PAUSED; 785 completePauseLocked(); 786 } else { 787 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 788 r.userId, System.identityHashCode(r), r.shortComponentName, 789 mPausingActivity != null 790 ? mPausingActivity.shortComponentName : "(none)"); 791 } 792 } 793 } 794 795 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, Bitmap thumbnail, 796 CharSequence description) { 797 if (r.state != ActivityState.STOPPING) { 798 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 799 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 800 return; 801 } 802 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 803 if (icicle != null) { 804 // If icicle is null, this is happening due to a timeout, so we 805 // haven't really saved the state. 806 r.icicle = icicle; 807 r.haveState = true; 808 r.launchCount = 0; 809 r.updateThumbnail(thumbnail, description); 810 } 811 if (!r.stopped) { 812 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 813 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 814 r.stopped = true; 815 r.state = ActivityState.STOPPED; 816 if (r.finishing) { 817 r.clearOptionsLocked(); 818 } else { 819 if (r.configDestroy) { 820 destroyActivityLocked(r, true, false, "stop-config"); 821 mStackSupervisor.resumeTopActivitiesLocked(); 822 } else { 823 mStackSupervisor.updatePreviousProcessLocked(r); 824 } 825 } 826 } 827 } 828 829 private final void completePauseLocked() { 830 ActivityRecord prev = mPausingActivity; 831 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 832 833 if (prev != null) { 834 if (prev.finishing) { 835 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 836 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 837 } else if (prev.app != null) { 838 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 839 if (prev.waitingVisible) { 840 prev.waitingVisible = false; 841 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 842 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 843 TAG, "Complete pause, no longer waiting: " + prev); 844 } 845 if (prev.configDestroy) { 846 // The previous is being paused because the configuration 847 // is changing, which means it is actually stopping... 848 // To juggle the fact that we are also starting a new 849 // instance right now, we need to first completely stop 850 // the current instance before starting the new one. 851 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 852 destroyActivityLocked(prev, true, false, "pause-config"); 853 } else { 854 mStackSupervisor.mStoppingActivities.add(prev); 855 if (mStackSupervisor.mStoppingActivities.size() > 3 || 856 prev.frontOfTask && mTaskHistory.size() <= 1) { 857 // If we already have a few activities waiting to stop, 858 // then give up on things going idle and start clearing 859 // them out. Or if r is the last of activity of the last task the stack 860 // will be empty and must be cleared immediately. 861 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 862 mStackSupervisor.scheduleIdleLocked(); 863 } else { 864 mStackSupervisor.checkReadyForSleepLocked(); 865 } 866 } 867 } else { 868 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 869 prev = null; 870 } 871 mPausingActivity = null; 872 } 873 874 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 875 if (!mService.isSleepingOrShuttingDown()) { 876 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 877 } else { 878 mStackSupervisor.checkReadyForSleepLocked(); 879 ActivityRecord top = topStack.topRunningActivityLocked(null); 880 if (top == null || (prev != null && top != prev)) { 881 // If there are no more activities available to run, 882 // do resume anyway to start something. Also if the top 883 // activity on the stack is not the just paused activity, 884 // we need to go ahead and resume it to ensure we complete 885 // an in-flight app switch. 886 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 887 } 888 } 889 890 if (prev != null) { 891 prev.resumeKeyDispatchingLocked(); 892 893 if (prev.app != null && prev.cpuTimeAtResume > 0 894 && mService.mBatteryStatsService.isOnBattery()) { 895 long diff; 896 synchronized (mService.mProcessStatsThread) { 897 diff = mService.mProcessStats.getCpuTimeForPid(prev.app.pid) 898 - prev.cpuTimeAtResume; 899 } 900 if (diff > 0) { 901 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 902 synchronized (bsi) { 903 BatteryStatsImpl.Uid.Proc ps = 904 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 905 prev.info.packageName); 906 if (ps != null) { 907 ps.addForegroundTimeLocked(diff); 908 } 909 } 910 } 911 } 912 prev.cpuTimeAtResume = 0; // reset it 913 } 914 } 915 916 /** 917 * Once we know that we have asked an application to put an activity in 918 * the resumed state (either by launching it or explicitly telling it), 919 * this function updates the rest of our state to match that fact. 920 */ 921 private void completeResumeLocked(ActivityRecord next) { 922 next.idle = false; 923 next.results = null; 924 next.newIntents = null; 925 926 // schedule an idle timeout in case the app doesn't do it for us. 927 mStackSupervisor.scheduleIdleTimeoutLocked(next); 928 929 mStackSupervisor.reportResumedActivityLocked(next); 930 931 next.resumeKeyDispatchingLocked(); 932 mNoAnimActivities.clear(); 933 934 // Mark the point when the activity is resuming 935 // TODO: To be more accurate, the mark should be before the onCreate, 936 // not after the onResume. But for subsequent starts, onResume is fine. 937 if (next.app != null) { 938 synchronized (mService.mProcessStatsThread) { 939 next.cpuTimeAtResume = mService.mProcessStats.getCpuTimeForPid(next.app.pid); 940 } 941 } else { 942 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 943 } 944 } 945 946 /** 947 * Version of ensureActivitiesVisible that can easily be called anywhere. 948 */ 949 final boolean ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 950 return ensureActivitiesVisibleLocked(starting, configChanges, false); 951 } 952 953 final boolean ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges, 954 boolean forceHomeShown) { 955 ActivityRecord r = topRunningActivityLocked(null); 956 return r != null && 957 ensureActivitiesVisibleLocked(r, starting, null, configChanges, forceHomeShown); 958 } 959 960 /** 961 * Make sure that all activities that need to be visible (that is, they 962 * currently can be seen by the user) actually are. 963 */ 964 final boolean ensureActivitiesVisibleLocked(ActivityRecord top, ActivityRecord starting, 965 String onlyThisProcess, int configChanges, boolean forceHomeShown) { 966 if (DEBUG_VISBILITY) Slog.v( 967 TAG, "ensureActivitiesVisible behind " + top 968 + " configChanges=0x" + Integer.toHexString(configChanges)); 969 970 if (mTranslucentActivityWaiting != top) { 971 mUndrawnActivitiesBelowTopTranslucent.clear(); 972 if (mTranslucentActivityWaiting != null) { 973 // Call the callback with a timeout indication. 974 notifyActivityDrawnLocked(null); 975 mTranslucentActivityWaiting = null; 976 } 977 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 978 } 979 980 // If the top activity is not fullscreen, then we need to 981 // make sure any activities under it are now visible. 982 boolean aboveTop = true; 983 boolean showHomeBehindStack = false; 984 boolean behindFullscreen = !mStackSupervisor.isFrontStack(this) && 985 !(forceHomeShown && isHomeStack()); 986 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 987 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 988 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 989 final ActivityRecord r = activities.get(activityNdx); 990 if (r.finishing) { 991 continue; 992 } 993 if (aboveTop && r != top) { 994 continue; 995 } 996 aboveTop = false; 997 if (!behindFullscreen) { 998 if (DEBUG_VISBILITY) Slog.v( 999 TAG, "Make visible? " + r + " finishing=" + r.finishing 1000 + " state=" + r.state); 1001 1002 final boolean doThisProcess = onlyThisProcess == null 1003 || onlyThisProcess.equals(r.processName); 1004 1005 // First: if this is not the current activity being started, make 1006 // sure it matches the current configuration. 1007 if (r != starting && doThisProcess) { 1008 ensureActivityConfigurationLocked(r, 0); 1009 } 1010 1011 if (r.app == null || r.app.thread == null) { 1012 if (onlyThisProcess == null || onlyThisProcess.equals(r.processName)) { 1013 // This activity needs to be visible, but isn't even 1014 // running... get it started, but don't resume it 1015 // at this point. 1016 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1017 if (r != starting) { 1018 r.startFreezingScreenLocked(r.app, configChanges); 1019 } 1020 if (!r.visible) { 1021 if (DEBUG_VISBILITY) Slog.v( 1022 TAG, "Starting and making visible: " + r); 1023 mWindowManager.setAppVisibility(r.appToken, true); 1024 } 1025 if (r != starting) { 1026 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1027 } 1028 } 1029 1030 } else if (r.visible) { 1031 // If this activity is already visible, then there is nothing 1032 // else to do here. 1033 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1034 r.stopFreezingScreenLocked(false); 1035 1036 } else if (onlyThisProcess == null) { 1037 // This activity is not currently visible, but is running. 1038 // Tell it to become visible. 1039 r.visible = true; 1040 if (r.state != ActivityState.RESUMED && r != starting) { 1041 // If this activity is paused, tell it 1042 // to now show its window. 1043 if (DEBUG_VISBILITY) Slog.v( 1044 TAG, "Making visible and scheduling visibility: " + r); 1045 try { 1046 if (mTranslucentActivityWaiting != null) { 1047 mUndrawnActivitiesBelowTopTranslucent.add(r); 1048 } 1049 mWindowManager.setAppVisibility(r.appToken, true); 1050 r.sleeping = false; 1051 r.app.pendingUiClean = true; 1052 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1053 r.stopFreezingScreenLocked(false); 1054 } catch (Exception e) { 1055 // Just skip on any failure; we'll make it 1056 // visible when it next restarts. 1057 Slog.w(TAG, "Exception thrown making visibile: " 1058 + r.intent.getComponent(), e); 1059 } 1060 } 1061 } 1062 1063 // Aggregate current change flags. 1064 configChanges |= r.configChangeFlags; 1065 1066 if (r.fullscreen) { 1067 // At this point, nothing else needs to be shown 1068 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1069 behindFullscreen = true; 1070 } else if (r.mLaunchHomeTaskNext) { 1071 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1072 showHomeBehindStack = true; 1073 behindFullscreen = true; 1074 } 1075 } else { 1076 if (DEBUG_VISBILITY) Slog.v( 1077 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1078 + " state=" + r.state 1079 + " behindFullscreen=" + behindFullscreen); 1080 // Now for any activities that aren't visible to the user, make 1081 // sure they no longer are keeping the screen frozen. 1082 if (r.visible) { 1083 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1084 r.visible = false; 1085 try { 1086 mWindowManager.setAppVisibility(r.appToken, false); 1087 switch (r.state) { 1088 case STOPPING: 1089 case STOPPED: 1090 if (r.app != null && r.app.thread != null) { 1091 if (DEBUG_VISBILITY) Slog.v( 1092 TAG, "Scheduling invisibility: " + r); 1093 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1094 } 1095 break; 1096 1097 case INITIALIZING: 1098 case RESUMED: 1099 case PAUSING: 1100 case PAUSED: 1101 // This case created for transitioning activities from 1102 // translucent to opaque {@link Activity#convertToOpaque}. 1103 mStackSupervisor.mStoppingActivities.remove(r); 1104 stopActivityLocked(r); 1105 break; 1106 1107 default: 1108 break; 1109 } 1110 } catch (Exception e) { 1111 // Just skip on any failure; we'll make it 1112 // visible when it next restarts. 1113 Slog.w(TAG, "Exception thrown making hidden: " 1114 + r.intent.getComponent(), e); 1115 } 1116 } else { 1117 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1118 } 1119 } 1120 } 1121 } 1122 return showHomeBehindStack; 1123 } 1124 1125 void convertToTranslucent(ActivityRecord r) { 1126 mTranslucentActivityWaiting = r; 1127 mUndrawnActivitiesBelowTopTranslucent.clear(); 1128 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1129 } 1130 1131 /** 1132 * Called as activities below the top translucent activity are redrawn. When the last one is 1133 * redrawn notify the top activity by calling 1134 * {@link Activity#onTranslucentConversionComplete}. 1135 * 1136 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1137 * occurred and the activity will be notified immediately. 1138 */ 1139 void notifyActivityDrawnLocked(ActivityRecord r) { 1140 if ((r == null) 1141 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1142 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1143 // The last undrawn activity below the top has just been drawn. If there is an 1144 // opaque activity at the top, notify it that it can become translucent safely now. 1145 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1146 mTranslucentActivityWaiting = null; 1147 mUndrawnActivitiesBelowTopTranslucent.clear(); 1148 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1149 1150 if (waitingActivity != null && waitingActivity.app != null && 1151 waitingActivity.app.thread != null) { 1152 try { 1153 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1154 waitingActivity.appToken, r != null); 1155 } catch (RemoteException e) { 1156 } 1157 } 1158 } 1159 } 1160 1161 /** 1162 * Ensure that the top activity in the stack is resumed. 1163 * 1164 * @param prev The previously resumed activity, for when in the process 1165 * of pausing; can be null to call from elsewhere. 1166 * 1167 * @return Returns true if something is being resumed, or false if 1168 * nothing happened. 1169 */ 1170 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1171 return resumeTopActivityLocked(prev, null); 1172 } 1173 1174 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1175 // Find the first activity that is not finishing. 1176 ActivityRecord next = topRunningActivityLocked(null); 1177 1178 // Remember how we'll process this pause/resume situation, and ensure 1179 // that the state is reset however we wind up proceeding. 1180 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1181 mStackSupervisor.mUserLeaving = false; 1182 1183 if (next == null) { 1184 // There are no more activities! Let's just start up the 1185 // Launcher... 1186 ActivityOptions.abort(options); 1187 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1188 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1189 return mStackSupervisor.resumeHomeActivity(prev); 1190 } 1191 1192 next.delayedResume = false; 1193 1194 // If the top activity is the resumed one, nothing to do. 1195 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1196 mStackSupervisor.allResumedActivitiesComplete()) { 1197 // Make sure we have executed any pending transitions, since there 1198 // should be nothing left to do at this point. 1199 mWindowManager.executeAppTransition(); 1200 mNoAnimActivities.clear(); 1201 ActivityOptions.abort(options); 1202 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1203 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1204 return false; 1205 } 1206 1207 final TaskRecord nextTask = next.task; 1208 final TaskRecord prevTask = prev != null ? prev.task : null; 1209 if (prevTask != null && prev.mLaunchHomeTaskNext && prev.finishing && prev.frontOfTask) { 1210 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1211 if (prevTask == nextTask) { 1212 ArrayList<ActivityRecord> activities = prevTask.mActivities; 1213 final int numActivities = activities.size(); 1214 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 1215 final ActivityRecord r = activities.get(activityNdx); 1216 // r is usually the same as next, but what if two activities were launched 1217 // before prev finished? 1218 if (!r.finishing) { 1219 r.mLaunchHomeTaskNext = true; 1220 r.frontOfTask = true; 1221 break; 1222 } 1223 } 1224 } else if (prevTask != topTask()) { 1225 // This task is going away but it was supposed to return to the home task. 1226 // Now the task above it has to return to the home task instead. 1227 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1228 mTaskHistory.get(taskNdx).mActivities.get(0).mLaunchHomeTaskNext = true; 1229 } else { 1230 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Launching home next"); 1231 return mStackSupervisor.resumeHomeActivity(prev); 1232 } 1233 } 1234 1235 // If we are sleeping, and there is no resumed activity, and the top 1236 // activity is paused, well that is the state we want. 1237 if ((mService.isSleepingOrShuttingDown()) 1238 && mLastPausedActivity == next 1239 && mStackSupervisor.allPausedActivitiesComplete()) { 1240 // Make sure we have executed any pending transitions, since there 1241 // should be nothing left to do at this point. 1242 mWindowManager.executeAppTransition(); 1243 mNoAnimActivities.clear(); 1244 ActivityOptions.abort(options); 1245 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1246 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1247 return false; 1248 } 1249 1250 // Make sure that the user who owns this activity is started. If not, 1251 // we will just leave it as is because someone should be bringing 1252 // another user's activities to the top of the stack. 1253 if (mService.mStartedUsers.get(next.userId) == null) { 1254 Slog.w(TAG, "Skipping resume of top activity " + next 1255 + ": user " + next.userId + " is stopped"); 1256 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1257 return false; 1258 } 1259 1260 // The activity may be waiting for stop, but that is no longer 1261 // appropriate for it. 1262 mStackSupervisor.mStoppingActivities.remove(next); 1263 mStackSupervisor.mGoingToSleepActivities.remove(next); 1264 next.sleeping = false; 1265 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1266 1267 next.updateOptionsLocked(options); 1268 1269 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1270 1271 // If we are currently pausing an activity, then don't do anything 1272 // until that is done. 1273 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1274 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1275 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1276 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1277 return false; 1278 } 1279 1280 // Okay we are now going to start a switch, to 'next'. We may first 1281 // have to pause the current activity, but this is an important point 1282 // where we have decided to go to 'next' so keep track of that. 1283 // XXX "App Redirected" dialog is getting too many false positives 1284 // at this point, so turn off for now. 1285 if (false) { 1286 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1287 long now = SystemClock.uptimeMillis(); 1288 final boolean inTime = mLastStartedActivity.startTime != 0 1289 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1290 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1291 final int nextUid = next.info.applicationInfo.uid; 1292 if (inTime && lastUid != nextUid 1293 && lastUid != next.launchedFromUid 1294 && mService.checkPermission( 1295 android.Manifest.permission.STOP_APP_SWITCHES, 1296 -1, next.launchedFromUid) 1297 != PackageManager.PERMISSION_GRANTED) { 1298 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1299 } else { 1300 next.startTime = now; 1301 mLastStartedActivity = next; 1302 } 1303 } else { 1304 next.startTime = SystemClock.uptimeMillis(); 1305 mLastStartedActivity = next; 1306 } 1307 } 1308 1309 // We need to start pausing the current activity so the top one 1310 // can be resumed... 1311 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving); 1312 if (mResumedActivity != null) { 1313 pausing = true; 1314 startPausingLocked(userLeaving, false); 1315 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1316 } 1317 if (pausing) { 1318 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1319 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1320 // At this point we want to put the upcoming activity's process 1321 // at the top of the LRU list, since we know we will be needing it 1322 // very soon and it would be a waste to let it get killed if it 1323 // happens to be sitting towards the end. 1324 if (next.app != null && next.app.thread != null) { 1325 // No reason to do full oom adj update here; we'll let that 1326 // happen whenever it needs to later. 1327 mService.updateLruProcessLocked(next.app, false); 1328 } 1329 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1330 return true; 1331 } 1332 1333 // If the most recent activity was noHistory but was only stopped rather 1334 // than stopped+finished because the device went to sleep, we need to make 1335 // sure to finish it as we're making a new activity topmost. 1336 final ActivityRecord last = mLastPausedActivity; 1337 if (mService.mSleeping && last != null && !last.finishing) { 1338 if ((last.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 1339 || (last.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 1340 if (DEBUG_STATES) { 1341 Slog.d(TAG, "no-history finish of " + last + " on new resume"); 1342 } 1343 requestFinishActivityLocked(last.appToken, Activity.RESULT_CANCELED, null, 1344 "no-history", false); 1345 } 1346 } 1347 1348 if (prev != null && prev != next) { 1349 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1350 prev.waitingVisible = true; 1351 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1352 if (DEBUG_SWITCH) Slog.v( 1353 TAG, "Resuming top, waiting visible to hide: " + prev); 1354 } else { 1355 // The next activity is already visible, so hide the previous 1356 // activity's windows right now so we can show the new one ASAP. 1357 // We only do this if the previous is finishing, which should mean 1358 // it is on top of the one being resumed so hiding it quickly 1359 // is good. Otherwise, we want to do the normal route of allowing 1360 // the resumed activity to be shown so we can decide if the 1361 // previous should actually be hidden depending on whether the 1362 // new one is found to be full-screen or not. 1363 if (prev.finishing) { 1364 mWindowManager.setAppVisibility(prev.appToken, false); 1365 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1366 + prev + ", waitingVisible=" 1367 + (prev != null ? prev.waitingVisible : null) 1368 + ", nowVisible=" + next.nowVisible); 1369 } else { 1370 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1371 + prev + ", waitingVisible=" 1372 + (prev != null ? prev.waitingVisible : null) 1373 + ", nowVisible=" + next.nowVisible); 1374 } 1375 } 1376 } 1377 1378 // Launching this app's activity, make sure the app is no longer 1379 // considered stopped. 1380 try { 1381 AppGlobals.getPackageManager().setPackageStoppedState( 1382 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1383 } catch (RemoteException e1) { 1384 } catch (IllegalArgumentException e) { 1385 Slog.w(TAG, "Failed trying to unstop package " 1386 + next.packageName + ": " + e); 1387 } 1388 1389 // We are starting up the next activity, so tell the window manager 1390 // that the previous one will be hidden soon. This way it can know 1391 // to ignore it when computing the desired screen orientation. 1392 boolean anim = true; 1393 if (prev != null) { 1394 if (prev.finishing) { 1395 if (DEBUG_TRANSITION) Slog.v(TAG, 1396 "Prepare close transition: prev=" + prev); 1397 if (mNoAnimActivities.contains(prev)) { 1398 anim = false; 1399 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1400 } else { 1401 mWindowManager.prepareAppTransition(prev.task == next.task 1402 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1403 : AppTransition.TRANSIT_TASK_CLOSE, false); 1404 } 1405 mWindowManager.setAppWillBeHidden(prev.appToken); 1406 mWindowManager.setAppVisibility(prev.appToken, false); 1407 } else { 1408 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1409 if (mNoAnimActivities.contains(next)) { 1410 anim = false; 1411 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1412 } else { 1413 mWindowManager.prepareAppTransition(prev.task == next.task 1414 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1415 : AppTransition.TRANSIT_TASK_OPEN, false); 1416 } 1417 } 1418 if (false) { 1419 mWindowManager.setAppWillBeHidden(prev.appToken); 1420 mWindowManager.setAppVisibility(prev.appToken, false); 1421 } 1422 } else { 1423 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1424 if (mNoAnimActivities.contains(next)) { 1425 anim = false; 1426 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1427 } else { 1428 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1429 } 1430 } 1431 if (anim) { 1432 next.applyOptionsLocked(); 1433 } else { 1434 next.clearOptionsLocked(); 1435 } 1436 1437 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1438 if (next.app != null && next.app.thread != null) { 1439 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1440 1441 // This activity is now becoming visible. 1442 mWindowManager.setAppVisibility(next.appToken, true); 1443 1444 // schedule launch ticks to collect information about slow apps. 1445 next.startLaunchTickingLocked(); 1446 1447 ActivityRecord lastResumedActivity = 1448 lastStack == null ? null :lastStack.mResumedActivity; 1449 ActivityState lastState = next.state; 1450 1451 mService.updateCpuStats(); 1452 1453 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1454 next.state = ActivityState.RESUMED; 1455 mResumedActivity = next; 1456 next.task.touchActiveTime(); 1457 mService.addRecentTaskLocked(next.task); 1458 mService.updateLruProcessLocked(next.app, true); 1459 updateLRUListLocked(next); 1460 1461 // Have the window manager re-evaluate the orientation of 1462 // the screen based on the new activity order. 1463 boolean notUpdated = true; 1464 if (mStackSupervisor.isFrontStack(this)) { 1465 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1466 mService.mConfiguration, 1467 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1468 if (config != null) { 1469 next.frozenBeforeDestroy = true; 1470 } 1471 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1472 } 1473 1474 if (notUpdated) { 1475 // The configuration update wasn't able to keep the existing 1476 // instance of the activity, and instead started a new one. 1477 // We should be all done, but let's just make sure our activity 1478 // is still at the top and schedule another run if something 1479 // weird happened. 1480 ActivityRecord nextNext = topRunningActivityLocked(null); 1481 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1482 "Activity config changed during resume: " + next 1483 + ", new next: " + nextNext); 1484 if (nextNext != next) { 1485 // Do over! 1486 mStackSupervisor.scheduleResumeTopActivities(); 1487 } 1488 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1489 mNoAnimActivities.clear(); 1490 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1491 return true; 1492 } 1493 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1494 return false; 1495 } 1496 1497 try { 1498 // Deliver all pending results. 1499 ArrayList<ResultInfo> a = next.results; 1500 if (a != null) { 1501 final int N = a.size(); 1502 if (!next.finishing && N > 0) { 1503 if (DEBUG_RESULTS) Slog.v( 1504 TAG, "Delivering results to " + next 1505 + ": " + a); 1506 next.app.thread.scheduleSendResult(next.appToken, a); 1507 } 1508 } 1509 1510 if (next.newIntents != null) { 1511 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1512 } 1513 1514 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1515 next.userId, System.identityHashCode(next), 1516 next.task.taskId, next.shortComponentName); 1517 1518 next.sleeping = false; 1519 mService.showAskCompatModeDialogLocked(next); 1520 next.app.pendingUiClean = true; 1521 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1522 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1523 mService.isNextTransitionForward()); 1524 1525 mStackSupervisor.checkReadyForSleepLocked(); 1526 1527 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1528 } catch (Exception e) { 1529 // Whoops, need to restart this activity! 1530 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1531 + lastState + ": " + next); 1532 next.state = lastState; 1533 if (lastStack != null) { 1534 lastStack.mResumedActivity = lastResumedActivity; 1535 } 1536 Slog.i(TAG, "Restarting because process died: " + next); 1537 if (!next.hasBeenLaunched) { 1538 next.hasBeenLaunched = true; 1539 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1540 mStackSupervisor.isFrontStack(lastStack)) { 1541 mWindowManager.setAppStartingWindow( 1542 next.appToken, next.packageName, next.theme, 1543 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1544 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1545 next.windowFlags, null, true); 1546 } 1547 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1548 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1549 return true; 1550 } 1551 1552 // From this point on, if something goes wrong there is no way 1553 // to recover the activity. 1554 try { 1555 next.visible = true; 1556 completeResumeLocked(next); 1557 } catch (Exception e) { 1558 // If any exception gets thrown, toss away this 1559 // activity and try the next one. 1560 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1561 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1562 "resume-exception", true); 1563 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1564 return true; 1565 } 1566 next.stopped = false; 1567 1568 } else { 1569 // Whoops, need to restart this activity! 1570 if (!next.hasBeenLaunched) { 1571 next.hasBeenLaunched = true; 1572 } else { 1573 if (SHOW_APP_STARTING_PREVIEW) { 1574 mWindowManager.setAppStartingWindow( 1575 next.appToken, next.packageName, next.theme, 1576 mService.compatibilityInfoForPackageLocked( 1577 next.info.applicationInfo), 1578 next.nonLocalizedLabel, 1579 next.labelRes, next.icon, next.logo, next.windowFlags, 1580 null, true); 1581 } 1582 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1583 } 1584 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1585 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1586 } 1587 1588 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1589 return true; 1590 } 1591 1592 private void insertTaskAtTop(TaskRecord task) { 1593 mTaskHistory.remove(task); 1594 // Now put task at top. 1595 int stackNdx = mTaskHistory.size(); 1596 if (task.userId != mCurrentUser) { 1597 // Put non-current user tasks below current user tasks. 1598 while (--stackNdx >= 0) { 1599 if (mTaskHistory.get(stackNdx).userId != mCurrentUser) { 1600 break; 1601 } 1602 } 1603 ++stackNdx; 1604 } 1605 mTaskHistory.add(stackNdx, task); 1606 } 1607 1608 final void startActivityLocked(ActivityRecord r, boolean newTask, 1609 boolean doResume, boolean keepCurTransition, Bundle options) { 1610 TaskRecord rTask = r.task; 1611 final int taskId = rTask.taskId; 1612 if (taskForIdLocked(taskId) == null || newTask) { 1613 // Last activity in task had been removed or ActivityManagerService is reusing task. 1614 // Insert or replace. 1615 // Might not even be in. 1616 insertTaskAtTop(rTask); 1617 mWindowManager.moveTaskToTop(taskId); 1618 } 1619 TaskRecord task = null; 1620 if (!newTask) { 1621 // If starting in an existing task, find where that is... 1622 boolean startIt = true; 1623 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1624 task = mTaskHistory.get(taskNdx); 1625 if (task == r.task) { 1626 // Here it is! Now, if this is not yet visible to the 1627 // user, then just add it without starting; it will 1628 // get started when the user navigates back to it. 1629 if (!startIt) { 1630 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1631 + task, new RuntimeException("here").fillInStackTrace()); 1632 task.addActivityToTop(r); 1633 r.putInHistory(); 1634 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1635 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1636 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1637 r.userId); 1638 if (VALIDATE_TOKENS) { 1639 validateAppTokensLocked(); 1640 } 1641 ActivityOptions.abort(options); 1642 return; 1643 } 1644 break; 1645 } else if (task.numFullscreen > 0) { 1646 startIt = false; 1647 } 1648 } 1649 } 1650 1651 // Place a new activity at top of stack, so it is next to interact 1652 // with the user. 1653 1654 // If we are not placing the new activity frontmost, we do not want 1655 // to deliver the onUserLeaving callback to the actual frontmost 1656 // activity 1657 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1658 mStackSupervisor.mUserLeaving = false; 1659 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1660 "startActivity() behind front, mUserLeaving=false"); 1661 } 1662 1663 task = r.task; 1664 1665 // Slot the activity into the history stack and proceed 1666 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1667 new RuntimeException("here").fillInStackTrace()); 1668 task.addActivityToTop(r); 1669 1670 r.putInHistory(); 1671 r.frontOfTask = newTask; 1672 if (!isHomeStack() || numActivities() > 0) { 1673 // We want to show the starting preview window if we are 1674 // switching to a new task, or the next activity's process is 1675 // not currently running. 1676 boolean showStartingIcon = newTask; 1677 ProcessRecord proc = r.app; 1678 if (proc == null) { 1679 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 1680 } 1681 if (proc == null || proc.thread == null) { 1682 showStartingIcon = true; 1683 } 1684 if (DEBUG_TRANSITION) Slog.v(TAG, 1685 "Prepare open transition: starting " + r); 1686 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 1687 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 1688 mNoAnimActivities.add(r); 1689 } else { 1690 mWindowManager.prepareAppTransition(newTask 1691 ? AppTransition.TRANSIT_TASK_OPEN 1692 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 1693 mNoAnimActivities.remove(r); 1694 } 1695 r.updateOptionsLocked(options); 1696 mWindowManager.addAppToken(task.mActivities.indexOf(r), 1697 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1698 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId); 1699 boolean doShow = true; 1700 if (newTask) { 1701 // Even though this activity is starting fresh, we still need 1702 // to reset it to make sure we apply affinities to move any 1703 // existing activities from other tasks in to it. 1704 // If the caller has requested that the target task be 1705 // reset, then do so. 1706 if ((r.intent.getFlags() 1707 &Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 1708 resetTaskIfNeededLocked(r, r); 1709 doShow = topRunningNonDelayedActivityLocked(null) == r; 1710 } 1711 } 1712 if (SHOW_APP_STARTING_PREVIEW && doShow) { 1713 // Figure out if we are transitioning from another activity that is 1714 // "has the same starting icon" as the next one. This allows the 1715 // window manager to keep the previous window it had previously 1716 // created, if it still had one. 1717 ActivityRecord prev = mResumedActivity; 1718 if (prev != null) { 1719 // We don't want to reuse the previous starting preview if: 1720 // (1) The current activity is in a different task. 1721 if (prev.task != r.task) { 1722 prev = null; 1723 } 1724 // (2) The current activity is already displayed. 1725 else if (prev.nowVisible) { 1726 prev = null; 1727 } 1728 } 1729 mWindowManager.setAppStartingWindow( 1730 r.appToken, r.packageName, r.theme, 1731 mService.compatibilityInfoForPackageLocked( 1732 r.info.applicationInfo), r.nonLocalizedLabel, 1733 r.labelRes, r.icon, r.logo, r.windowFlags, 1734 prev != null ? prev.appToken : null, showStartingIcon); 1735 } 1736 } else { 1737 // If this is the first activity, don't do any fancy animations, 1738 // because there is nothing for it to animate on top of. 1739 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1740 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1741 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId); 1742 ActivityOptions.abort(options); 1743 } 1744 if (VALIDATE_TOKENS) { 1745 validateAppTokensLocked(); 1746 } 1747 1748 if (doResume) { 1749 mStackSupervisor.resumeTopActivitiesLocked(); 1750 } 1751 } 1752 1753 final void validateAppTokensLocked() { 1754 mValidateAppTokens.clear(); 1755 mValidateAppTokens.ensureCapacity(numActivities()); 1756 final int numTasks = mTaskHistory.size(); 1757 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 1758 TaskRecord task = mTaskHistory.get(taskNdx); 1759 final ArrayList<ActivityRecord> activities = task.mActivities; 1760 if (activities.size() == 0) { 1761 continue; 1762 } 1763 TaskGroup group = new TaskGroup(); 1764 group.taskId = task.taskId; 1765 mValidateAppTokens.add(group); 1766 final int numActivities = activities.size(); 1767 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 1768 final ActivityRecord r = activities.get(activityNdx); 1769 group.tokens.add(r.appToken); 1770 } 1771 } 1772 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 1773 } 1774 1775 /** 1776 * Perform a reset of the given task, if needed as part of launching it. 1777 * Returns the new HistoryRecord at the top of the task. 1778 */ 1779 /** 1780 * Helper method for #resetTaskIfNeededLocked. 1781 * We are inside of the task being reset... we'll either finish this activity, push it out 1782 * for another task, or leave it as-is. 1783 * @param task The task containing the Activity (taskTop) that might be reset. 1784 * @param forceReset 1785 * @return An ActivityOptions that needs to be processed. 1786 */ 1787 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 1788 ActivityOptions topOptions = null; 1789 1790 int replyChainEnd = -1; 1791 boolean canMoveOptions = true; 1792 1793 // We only do this for activities that are not the root of the task (since if we finish 1794 // the root, we may no longer have the task!). 1795 final ArrayList<ActivityRecord> activities = task.mActivities; 1796 final int numActivities = activities.size(); 1797 for (int i = numActivities - 1; i > 0; --i ) { 1798 ActivityRecord target = activities.get(i); 1799 1800 final int flags = target.info.flags; 1801 final boolean finishOnTaskLaunch = 1802 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 1803 final boolean allowTaskReparenting = 1804 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 1805 final boolean clearWhenTaskReset = 1806 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 1807 1808 if (!finishOnTaskLaunch 1809 && !clearWhenTaskReset 1810 && target.resultTo != null) { 1811 // If this activity is sending a reply to a previous 1812 // activity, we can't do anything with it now until 1813 // we reach the start of the reply chain. 1814 // XXX note that we are assuming the result is always 1815 // to the previous activity, which is almost always 1816 // the case but we really shouldn't count on. 1817 if (replyChainEnd < 0) { 1818 replyChainEnd = i; 1819 } 1820 } else if (!finishOnTaskLaunch 1821 && !clearWhenTaskReset 1822 && allowTaskReparenting 1823 && target.taskAffinity != null 1824 && !target.taskAffinity.equals(task.affinity)) { 1825 // If this activity has an affinity for another 1826 // task, then we need to move it out of here. We will 1827 // move it as far out of the way as possible, to the 1828 // bottom of the activity stack. This also keeps it 1829 // correctly ordered with any activities we previously 1830 // moved. 1831 TaskRecord bottomTask = mTaskHistory.get(0); 1832 ActivityRecord p = bottomTask.mActivities.get(0); 1833 if (target.taskAffinity != null 1834 && target.taskAffinity.equals(p.task.affinity)) { 1835 // If the activity currently at the bottom has the 1836 // same task affinity as the one we are moving, 1837 // then merge it into the same task. 1838 target.setTask(p.task, p.thumbHolder, false); 1839 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 1840 + " out to bottom task " + p.task); 1841 } else { 1842 target.setTask(createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 1843 null, false), null, false); 1844 target.task.affinityIntent = target.intent; 1845 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 1846 + " out to new task " + target.task); 1847 } 1848 1849 final TaskRecord targetTask = target.task; 1850 final int targetTaskId = targetTask.taskId; 1851 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 1852 1853 boolean noOptions = canMoveOptions; 1854 final int start = replyChainEnd < 0 ? i : replyChainEnd; 1855 for (int srcPos = start; srcPos >= i; --srcPos) { 1856 p = activities.get(srcPos); 1857 if (p.finishing) { 1858 continue; 1859 } 1860 1861 ThumbnailHolder curThumbHolder = p.thumbHolder; 1862 canMoveOptions = false; 1863 if (noOptions && topOptions == null) { 1864 topOptions = p.takeOptionsLocked(); 1865 if (topOptions != null) { 1866 noOptions = false; 1867 } 1868 } 1869 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 1870 + task + " adding to task=" + targetTask, 1871 new RuntimeException("here").fillInStackTrace()); 1872 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 1873 + " out to target's task " + target.task); 1874 p.setTask(targetTask, curThumbHolder, false); 1875 targetTask.addActivityAtBottom(p); 1876 1877 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 1878 } 1879 1880 mWindowManager.moveTaskToBottom(targetTaskId); 1881 if (VALIDATE_TOKENS) { 1882 validateAppTokensLocked(); 1883 } 1884 1885 replyChainEnd = -1; 1886 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 1887 // If the activity should just be removed -- either 1888 // because it asks for it, or the task should be 1889 // cleared -- then finish it and anything that is 1890 // part of its reply chain. 1891 int end; 1892 if (clearWhenTaskReset) { 1893 // In this case, we want to finish this activity 1894 // and everything above it, so be sneaky and pretend 1895 // like these are all in the reply chain. 1896 end = numActivities - 1; 1897 } else if (replyChainEnd < 0) { 1898 end = i; 1899 } else { 1900 end = replyChainEnd; 1901 } 1902 boolean noOptions = canMoveOptions; 1903 for (int srcPos = i; srcPos <= end; srcPos++) { 1904 ActivityRecord p = activities.get(srcPos); 1905 if (p.finishing) { 1906 continue; 1907 } 1908 canMoveOptions = false; 1909 if (noOptions && topOptions == null) { 1910 topOptions = p.takeOptionsLocked(); 1911 if (topOptions != null) { 1912 noOptions = false; 1913 } 1914 } 1915 if (DEBUG_TASKS) Slog.w(TAG, 1916 "resetTaskIntendedTask: calling finishActivity on " + p); 1917 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 1918 end--; 1919 srcPos--; 1920 } 1921 } 1922 replyChainEnd = -1; 1923 } else { 1924 // If we were in the middle of a chain, well the 1925 // activity that started it all doesn't want anything 1926 // special, so leave it all as-is. 1927 replyChainEnd = -1; 1928 } 1929 } 1930 1931 return topOptions; 1932 } 1933 1934 /** 1935 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 1936 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 1937 * @param affinityTask The task we are looking for an affinity to. 1938 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 1939 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 1940 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 1941 */ 1942 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 1943 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 1944 int replyChainEnd = -1; 1945 final int taskId = task.taskId; 1946 final String taskAffinity = task.affinity; 1947 1948 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 1949 final int numActivities = activities.size(); 1950 // Do not operate on the root Activity. 1951 for (int i = numActivities - 1; i > 0; --i) { 1952 ActivityRecord target = activities.get(i); 1953 1954 final int flags = target.info.flags; 1955 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 1956 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 1957 1958 if (target.resultTo != null) { 1959 // If this activity is sending a reply to a previous 1960 // activity, we can't do anything with it now until 1961 // we reach the start of the reply chain. 1962 // XXX note that we are assuming the result is always 1963 // to the previous activity, which is almost always 1964 // the case but we really shouldn't count on. 1965 if (replyChainEnd < 0) { 1966 replyChainEnd = i; 1967 } 1968 } else if (topTaskIsHigher 1969 && allowTaskReparenting 1970 && taskAffinity != null 1971 && taskAffinity.equals(target.taskAffinity)) { 1972 // This activity has an affinity for our task. Either remove it if we are 1973 // clearing or move it over to our task. Note that 1974 // we currently punt on the case where we are resetting a 1975 // task that is not at the top but who has activities above 1976 // with an affinity to it... this is really not a normal 1977 // case, and we will need to later pull that task to the front 1978 // and usually at that point we will do the reset and pick 1979 // up those remaining activities. (This only happens if 1980 // someone starts an activity in a new task from an activity 1981 // in a task that is not currently on top.) 1982 if (forceReset || finishOnTaskLaunch) { 1983 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 1984 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 1985 for (int srcPos = start; srcPos >= i; --srcPos) { 1986 final ActivityRecord p = activities.get(srcPos); 1987 if (p.finishing) { 1988 continue; 1989 } 1990 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 1991 } 1992 } else { 1993 if (taskInsertionPoint < 0) { 1994 taskInsertionPoint = task.mActivities.size(); 1995 1996 } 1997 1998 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 1999 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2000 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2001 for (int srcPos = start; srcPos >= i; --srcPos) { 2002 final ActivityRecord p = activities.get(srcPos); 2003 p.setTask(task, null, false); 2004 task.addActivityAtIndex(taskInsertionPoint, p); 2005 2006 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2007 + " to stack at " + task, 2008 new RuntimeException("here").fillInStackTrace()); 2009 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2010 + " in to resetting task " + task); 2011 mWindowManager.setAppGroupId(p.appToken, taskId); 2012 } 2013 mWindowManager.moveTaskToTop(taskId); 2014 if (VALIDATE_TOKENS) { 2015 validateAppTokensLocked(); 2016 } 2017 2018 // Now we've moved it in to place... but what if this is 2019 // a singleTop activity and we have put it on top of another 2020 // instance of the same activity? Then we drop the instance 2021 // below so it remains singleTop. 2022 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2023 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2024 int targetNdx = taskActivities.indexOf(target); 2025 if (targetNdx > 0) { 2026 ActivityRecord p = taskActivities.get(targetNdx - 1); 2027 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2028 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2029 false); 2030 } 2031 } 2032 } 2033 } 2034 2035 replyChainEnd = -1; 2036 } 2037 } 2038 return taskInsertionPoint; 2039 } 2040 2041 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2042 ActivityRecord newActivity) { 2043 boolean forceReset = 2044 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2045 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2046 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2047 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2048 forceReset = true; 2049 } 2050 } 2051 2052 final TaskRecord task = taskTop.task; 2053 2054 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2055 * for remaining tasks. Used for later tasks to reparent to task. */ 2056 boolean taskFound = false; 2057 2058 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2059 ActivityOptions topOptions = null; 2060 2061 // Preserve the location for reparenting in the new task. 2062 int reparentInsertionPoint = -1; 2063 2064 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2065 final TaskRecord targetTask = mTaskHistory.get(i); 2066 2067 if (targetTask == task) { 2068 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2069 taskFound = true; 2070 } else { 2071 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2072 taskFound, forceReset, reparentInsertionPoint); 2073 } 2074 } 2075 2076 int taskNdx = mTaskHistory.indexOf(task); 2077 do { 2078 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2079 } while (taskTop == null && taskNdx >= 0); 2080 2081 if (topOptions != null) { 2082 // If we got some ActivityOptions from an activity on top that 2083 // was removed from the task, propagate them to the new real top. 2084 if (taskTop != null) { 2085 taskTop.updateOptionsLocked(topOptions); 2086 } else { 2087 topOptions.abort(); 2088 } 2089 } 2090 2091 return taskTop; 2092 } 2093 2094 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2095 String resultWho, int requestCode, int resultCode, Intent data) { 2096 2097 if (callingUid > 0) { 2098 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2099 data, r.getUriPermissionsLocked()); 2100 } 2101 2102 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2103 + " : who=" + resultWho + " req=" + requestCode 2104 + " res=" + resultCode + " data=" + data); 2105 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2106 try { 2107 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2108 list.add(new ResultInfo(resultWho, requestCode, 2109 resultCode, data)); 2110 r.app.thread.scheduleSendResult(r.appToken, list); 2111 return; 2112 } catch (Exception e) { 2113 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2114 } 2115 } 2116 2117 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2118 } 2119 2120 final void stopActivityLocked(ActivityRecord r) { 2121 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2122 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2123 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2124 if (!r.finishing) { 2125 if (!mService.mSleeping) { 2126 if (DEBUG_STATES) { 2127 Slog.d(TAG, "no-history finish of " + r); 2128 } 2129 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2130 "no-history", false); 2131 } else { 2132 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2133 + " on stop because we're just sleeping"); 2134 } 2135 } 2136 } 2137 2138 if (r.app != null && r.app.thread != null) { 2139 if (mStackSupervisor.isFrontStack(this)) { 2140 if (mService.mFocusedActivity == r) { 2141 mService.setFocusedActivityLocked(topRunningActivityLocked(null)); 2142 } 2143 } 2144 r.resumeKeyDispatchingLocked(); 2145 try { 2146 r.stopped = false; 2147 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2148 + " (stop requested)"); 2149 r.state = ActivityState.STOPPING; 2150 if (DEBUG_VISBILITY) Slog.v( 2151 TAG, "Stopping visible=" + r.visible + " for " + r); 2152 if (!r.visible) { 2153 mWindowManager.setAppVisibility(r.appToken, false); 2154 } 2155 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2156 if (mService.isSleepingOrShuttingDown()) { 2157 r.setSleeping(true); 2158 } 2159 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2160 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2161 } catch (Exception e) { 2162 // Maybe just ignore exceptions here... if the process 2163 // has crashed, our death notification will clean things 2164 // up. 2165 Slog.w(TAG, "Exception thrown during pause", e); 2166 // Just in case, assume it to be stopped. 2167 r.stopped = true; 2168 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2169 r.state = ActivityState.STOPPED; 2170 if (r.configDestroy) { 2171 destroyActivityLocked(r, true, false, "stop-except"); 2172 } 2173 } 2174 } 2175 } 2176 2177 /** 2178 * @return Returns true if the activity is being finished, false if for 2179 * some reason it is being left as-is. 2180 */ 2181 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2182 Intent resultData, String reason, boolean oomAdj) { 2183 ActivityRecord r = isInStackLocked(token); 2184 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2185 TAG, "Finishing activity token=" + token + " r=" 2186 + ", result=" + resultCode + ", data=" + resultData 2187 + ", reason=" + reason); 2188 if (r == null) { 2189 return false; 2190 } 2191 2192 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2193 return true; 2194 } 2195 2196 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2197 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2198 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2199 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2200 ActivityRecord r = activities.get(activityNdx); 2201 if (r.resultTo == self && r.requestCode == requestCode) { 2202 if ((r.resultWho == null && resultWho == null) || 2203 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2204 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2205 false); 2206 } 2207 } 2208 } 2209 } 2210 mService.updateOomAdjLocked(); 2211 } 2212 2213 final void finishTopRunningActivityLocked(ProcessRecord app) { 2214 ActivityRecord r = topRunningActivityLocked(null); 2215 if (r != null && r.app == app) { 2216 // If the top running activity is from this crashing 2217 // process, then terminate it to avoid getting in a loop. 2218 Slog.w(TAG, " Force finishing activity " 2219 + r.intent.getComponent().flattenToShortString()); 2220 int taskNdx = mTaskHistory.indexOf(r.task); 2221 int activityNdx = r.task.mActivities.indexOf(r); 2222 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2223 // Also terminate any activities below it that aren't yet 2224 // stopped, to avoid a situation where one will get 2225 // re-start our crashing activity once it gets resumed again. 2226 --activityNdx; 2227 if (activityNdx < 0) { 2228 do { 2229 --taskNdx; 2230 if (taskNdx < 0) { 2231 break; 2232 } 2233 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2234 } while (activityNdx < 0); 2235 } 2236 if (activityNdx >= 0) { 2237 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2238 if (r.state == ActivityState.RESUMED 2239 || r.state == ActivityState.PAUSING 2240 || r.state == ActivityState.PAUSED) { 2241 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2242 Slog.w(TAG, " Force finishing activity " 2243 + r.intent.getComponent().flattenToShortString()); 2244 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2245 } 2246 } 2247 } 2248 } 2249 } 2250 2251 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2252 ArrayList<ActivityRecord> activities = r.task.mActivities; 2253 for (int index = activities.indexOf(r); index >= 0; --index) { 2254 ActivityRecord cur = activities.get(index); 2255 if (!Objects.equal(cur.taskAffinity, r.taskAffinity)) { 2256 break; 2257 } 2258 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2259 } 2260 return true; 2261 } 2262 2263 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2264 // send the result 2265 ActivityRecord resultTo = r.resultTo; 2266 if (resultTo != null) { 2267 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2268 + " who=" + r.resultWho + " req=" + r.requestCode 2269 + " res=" + resultCode + " data=" + resultData); 2270 if (r.info.applicationInfo.uid > 0) { 2271 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2272 resultTo.packageName, resultData, 2273 resultTo.getUriPermissionsLocked()); 2274 } 2275 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2276 resultData); 2277 r.resultTo = null; 2278 } 2279 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2280 2281 // Make sure this HistoryRecord is not holding on to other resources, 2282 // because clients have remote IPC references to this object so we 2283 // can't assume that will go away and want to avoid circular IPC refs. 2284 r.results = null; 2285 r.pendingResults = null; 2286 r.newIntents = null; 2287 r.icicle = null; 2288 } 2289 2290 /** 2291 * @return Returns true if this activity has been removed from the history 2292 * list, or false if it is still in the list and will be removed later. 2293 */ 2294 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2295 String reason, boolean oomAdj) { 2296 if (r.finishing) { 2297 Slog.w(TAG, "Duplicate finish request for " + r); 2298 return false; 2299 } 2300 2301 r.makeFinishing(); 2302 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2303 r.userId, System.identityHashCode(r), 2304 r.task.taskId, r.shortComponentName, reason); 2305 final ArrayList<ActivityRecord> activities = r.task.mActivities; 2306 final int index = activities.indexOf(r); 2307 if (index < (activities.size() - 1)) { 2308 ActivityRecord next = activities.get(index+1); 2309 if (r.frontOfTask) { 2310 // The next activity is now the front of the task. 2311 next.frontOfTask = true; 2312 } 2313 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2314 // If the caller asked that this activity (and all above it) 2315 // be cleared when the task is reset, don't lose that information, 2316 // but propagate it up to the next activity. 2317 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2318 } 2319 } 2320 2321 r.pauseKeyDispatchingLocked(); 2322 if (mStackSupervisor.isFrontStack(this)) { 2323 if (mService.mFocusedActivity == r) { 2324 mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked()); 2325 } 2326 } 2327 2328 finishActivityResultsLocked(r, resultCode, resultData); 2329 2330 if (mService.mPendingThumbnails.size() > 0) { 2331 // There are clients waiting to receive thumbnails so, in case 2332 // this is an activity that someone is waiting for, add it 2333 // to the pending list so we can correctly update the clients. 2334 mStackSupervisor.mCancelledThumbnails.add(r); 2335 } 2336 2337 if (mResumedActivity == r) { 2338 boolean endTask = index <= 0; 2339 if (DEBUG_TRANSITION) Slog.v(TAG, 2340 "Prepare close transition: finishing " + r); 2341 mWindowManager.prepareAppTransition(endTask 2342 ? AppTransition.TRANSIT_TASK_CLOSE 2343 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2344 2345 // Tell window manager to prepare for this one to be removed. 2346 mWindowManager.setAppVisibility(r.appToken, false); 2347 2348 if (mPausingActivity == null) { 2349 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2350 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2351 startPausingLocked(false, false); 2352 } 2353 2354 } else if (r.state != ActivityState.PAUSING) { 2355 // If the activity is PAUSING, we will complete the finish once 2356 // it is done pausing; else we can just directly finish it here. 2357 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2358 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2359 } else { 2360 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2361 } 2362 2363 return false; 2364 } 2365 2366 static final int FINISH_IMMEDIATELY = 0; 2367 static final int FINISH_AFTER_PAUSE = 1; 2368 static final int FINISH_AFTER_VISIBLE = 2; 2369 2370 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2371 // First things first: if this activity is currently visible, 2372 // and the resumed activity is not yet visible, then hold off on 2373 // finishing until the resumed one becomes visible. 2374 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2375 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2376 mStackSupervisor.mStoppingActivities.add(r); 2377 if (mStackSupervisor.mStoppingActivities.size() > 3 2378 || r.frontOfTask && mTaskHistory.size() <= 1) { 2379 // If we already have a few activities waiting to stop, 2380 // then give up on things going idle and start clearing 2381 // them out. Or if r is the last of activity of the last task the stack 2382 // will be empty and must be cleared immediately. 2383 mStackSupervisor.scheduleIdleLocked(); 2384 } else { 2385 mStackSupervisor.checkReadyForSleepLocked(); 2386 } 2387 } 2388 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2389 + " (finish requested)"); 2390 r.state = ActivityState.STOPPING; 2391 if (oomAdj) { 2392 mService.updateOomAdjLocked(); 2393 } 2394 return r; 2395 } 2396 2397 // make sure the record is cleaned out of other places. 2398 mStackSupervisor.mStoppingActivities.remove(r); 2399 mStackSupervisor.mGoingToSleepActivities.remove(r); 2400 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2401 if (mResumedActivity == r) { 2402 mResumedActivity = null; 2403 } 2404 final ActivityState prevState = r.state; 2405 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2406 r.state = ActivityState.FINISHING; 2407 2408 if (mode == FINISH_IMMEDIATELY 2409 || prevState == ActivityState.STOPPED 2410 || prevState == ActivityState.INITIALIZING) { 2411 // If this activity is already stopped, we can just finish 2412 // it right now. 2413 boolean activityRemoved = destroyActivityLocked(r, true, 2414 oomAdj, "finish-imm"); 2415 if (activityRemoved) { 2416 mStackSupervisor.resumeTopActivitiesLocked(); 2417 } 2418 return activityRemoved ? null : r; 2419 } 2420 2421 // Need to go through the full pause cycle to get this 2422 // activity into the stopped state and then finish it. 2423 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2424 mStackSupervisor.mFinishingActivities.add(r); 2425 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2426 return r; 2427 } 2428 2429 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2430 Intent resultData) { 2431 final ActivityRecord srec = ActivityRecord.forToken(token); 2432 final TaskRecord task = srec.task; 2433 final ArrayList<ActivityRecord> activities = task.mActivities; 2434 final int start = activities.indexOf(srec); 2435 if (!mTaskHistory.contains(task) || (start < 0)) { 2436 return false; 2437 } 2438 int finishTo = start - 1; 2439 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2440 boolean foundParentInTask = false; 2441 final ComponentName dest = destIntent.getComponent(); 2442 if (start > 0 && dest != null) { 2443 for (int i = finishTo; i >= 0; i--) { 2444 ActivityRecord r = activities.get(i); 2445 if (r.info.packageName.equals(dest.getPackageName()) && 2446 r.info.name.equals(dest.getClassName())) { 2447 finishTo = i; 2448 parent = r; 2449 foundParentInTask = true; 2450 break; 2451 } 2452 } 2453 } 2454 2455 IActivityController controller = mService.mController; 2456 if (controller != null) { 2457 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2458 if (next != null) { 2459 // ask watcher if this is allowed 2460 boolean resumeOK = true; 2461 try { 2462 resumeOK = controller.activityResuming(next.packageName); 2463 } catch (RemoteException e) { 2464 mService.mController = null; 2465 Watchdog.getInstance().setActivityController(null); 2466 } 2467 2468 if (!resumeOK) { 2469 return false; 2470 } 2471 } 2472 } 2473 final long origId = Binder.clearCallingIdentity(); 2474 for (int i = start; i > finishTo; i--) { 2475 ActivityRecord r = activities.get(i); 2476 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2477 // Only return the supplied result for the first activity finished 2478 resultCode = Activity.RESULT_CANCELED; 2479 resultData = null; 2480 } 2481 2482 if (parent != null && foundParentInTask) { 2483 final int parentLaunchMode = parent.info.launchMode; 2484 final int destIntentFlags = destIntent.getFlags(); 2485 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2486 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2487 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2488 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2489 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2490 } else { 2491 try { 2492 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2493 destIntent.getComponent(), 0, srec.userId); 2494 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2495 null, aInfo, parent.appToken, null, 2496 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2497 0, null, true, null); 2498 foundParentInTask = res == ActivityManager.START_SUCCESS; 2499 } catch (RemoteException e) { 2500 foundParentInTask = false; 2501 } 2502 requestFinishActivityLocked(parent.appToken, resultCode, 2503 resultData, "navigate-up", true); 2504 } 2505 } 2506 Binder.restoreCallingIdentity(origId); 2507 return foundParentInTask; 2508 } 2509 /** 2510 * Perform the common clean-up of an activity record. This is called both 2511 * as part of destroyActivityLocked() (when destroying the client-side 2512 * representation) and cleaning things up as a result of its hosting 2513 * processing going away, in which case there is no remaining client-side 2514 * state to destroy so only the cleanup here is needed. 2515 */ 2516 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2517 boolean setState) { 2518 if (mResumedActivity == r) { 2519 mResumedActivity = null; 2520 } 2521 if (mService.mFocusedActivity == r) { 2522 mService.mFocusedActivity = null; 2523 } 2524 2525 r.configDestroy = false; 2526 r.frozenBeforeDestroy = false; 2527 2528 if (setState) { 2529 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2530 r.state = ActivityState.DESTROYED; 2531 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2532 r.app = null; 2533 } 2534 2535 // Make sure this record is no longer in the pending finishes list. 2536 // This could happen, for example, if we are trimming activities 2537 // down to the max limit while they are still waiting to finish. 2538 mStackSupervisor.mFinishingActivities.remove(r); 2539 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2540 2541 // Remove any pending results. 2542 if (r.finishing && r.pendingResults != null) { 2543 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2544 PendingIntentRecord rec = apr.get(); 2545 if (rec != null) { 2546 mService.cancelIntentSenderLocked(rec, false); 2547 } 2548 } 2549 r.pendingResults = null; 2550 } 2551 2552 if (cleanServices) { 2553 cleanUpActivityServicesLocked(r); 2554 } 2555 2556 if (mService.mPendingThumbnails.size() > 0) { 2557 // There are clients waiting to receive thumbnails so, in case 2558 // this is an activity that someone is waiting for, add it 2559 // to the pending list so we can correctly update the clients. 2560 mStackSupervisor.mCancelledThumbnails.add(r); 2561 } 2562 2563 // Get rid of any pending idle timeouts. 2564 removeTimeoutsForActivityLocked(r); 2565 } 2566 2567 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2568 mStackSupervisor.removeTimeoutsForActivityLocked(r); 2569 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 2570 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 2571 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2572 r.finishLaunchTickingLocked(); 2573 } 2574 2575 final void removeActivityFromHistoryLocked(ActivityRecord r) { 2576 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 2577 r.makeFinishing(); 2578 if (DEBUG_ADD_REMOVE) { 2579 RuntimeException here = new RuntimeException("here"); 2580 here.fillInStackTrace(); 2581 Slog.i(TAG, "Removing activity " + r + " from stack"); 2582 } 2583 final TaskRecord task = r.task; 2584 if (task != null && task.removeActivity(r)) { 2585 if (DEBUG_STACK) Slog.i(TAG, 2586 "removeActivityFromHistoryLocked: last activity removed from " + this); 2587 mStackSupervisor.removeTask(task); 2588 } 2589 r.takeFromHistory(); 2590 removeTimeoutsForActivityLocked(r); 2591 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 2592 r.state = ActivityState.DESTROYED; 2593 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 2594 r.app = null; 2595 mWindowManager.removeAppToken(r.appToken); 2596 if (VALIDATE_TOKENS) { 2597 validateAppTokensLocked(); 2598 } 2599 cleanUpActivityServicesLocked(r); 2600 r.removeUriPermissionsLocked(); 2601 } 2602 2603 /** 2604 * Perform clean-up of service connections in an activity record. 2605 */ 2606 final void cleanUpActivityServicesLocked(ActivityRecord r) { 2607 // Throw away any services that have been bound by this activity. 2608 if (r.connections != null) { 2609 Iterator<ConnectionRecord> it = r.connections.iterator(); 2610 while (it.hasNext()) { 2611 ConnectionRecord c = it.next(); 2612 mService.mServices.removeConnectionLocked(c, null, r); 2613 } 2614 r.connections = null; 2615 } 2616 } 2617 2618 final void scheduleDestroyActivities(ProcessRecord owner, boolean oomAdj, String reason) { 2619 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 2620 msg.obj = new ScheduleDestroyArgs(owner, oomAdj, reason); 2621 mHandler.sendMessage(msg); 2622 } 2623 2624 final void destroyActivitiesLocked(ProcessRecord owner, boolean oomAdj, String reason) { 2625 boolean lastIsOpaque = false; 2626 boolean activityRemoved = false; 2627 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2628 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2629 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2630 final ActivityRecord r = activities.get(activityNdx); 2631 if (r.finishing) { 2632 continue; 2633 } 2634 if (r.fullscreen) { 2635 lastIsOpaque = true; 2636 } 2637 if (owner != null && r.app != owner) { 2638 continue; 2639 } 2640 if (!lastIsOpaque) { 2641 continue; 2642 } 2643 // We can destroy this one if we have its icicle saved and 2644 // it is not in the process of pausing/stopping/finishing. 2645 if (r.app != null && r != mResumedActivity && r != mPausingActivity 2646 && r.haveState && !r.visible && r.stopped 2647 && r.state != ActivityState.DESTROYING 2648 && r.state != ActivityState.DESTROYED) { 2649 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 2650 + " resumed=" + mResumedActivity 2651 + " pausing=" + mPausingActivity); 2652 if (destroyActivityLocked(r, true, oomAdj, reason)) { 2653 activityRemoved = true; 2654 } 2655 } 2656 } 2657 } 2658 if (activityRemoved) { 2659 mStackSupervisor.resumeTopActivitiesLocked(); 2660 2661 } 2662 } 2663 2664 /** 2665 * Destroy the current CLIENT SIDE instance of an activity. This may be 2666 * called both when actually finishing an activity, or when performing 2667 * a configuration switch where we destroy the current client-side object 2668 * but then create a new client-side object for this same HistoryRecord. 2669 */ 2670 final boolean destroyActivityLocked(ActivityRecord r, 2671 boolean removeFromApp, boolean oomAdj, String reason) { 2672 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 2673 TAG, "Removing activity from " + reason + ": token=" + r 2674 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 2675 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 2676 r.userId, System.identityHashCode(r), 2677 r.task.taskId, r.shortComponentName, reason); 2678 2679 boolean removedFromHistory = false; 2680 2681 cleanUpActivityLocked(r, false, false); 2682 2683 final boolean hadApp = r.app != null; 2684 2685 if (hadApp) { 2686 if (removeFromApp) { 2687 r.app.activities.remove(r); 2688 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 2689 mService.mHeavyWeightProcess = null; 2690 mService.mHandler.sendEmptyMessage( 2691 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 2692 } 2693 if (r.app.activities.size() == 0) { 2694 // No longer have activities, so update oom adj. 2695 mService.updateOomAdjLocked(); 2696 } 2697 } 2698 2699 boolean skipDestroy = false; 2700 2701 try { 2702 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 2703 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 2704 r.configChangeFlags); 2705 } catch (Exception e) { 2706 // We can just ignore exceptions here... if the process 2707 // has crashed, our death notification will clean things 2708 // up. 2709 //Slog.w(TAG, "Exception thrown during finish", e); 2710 if (r.finishing) { 2711 removeActivityFromHistoryLocked(r); 2712 removedFromHistory = true; 2713 skipDestroy = true; 2714 } 2715 } 2716 2717 r.nowVisible = false; 2718 2719 // If the activity is finishing, we need to wait on removing it 2720 // from the list to give it a chance to do its cleanup. During 2721 // that time it may make calls back with its token so we need to 2722 // be able to find it on the list and so we don't want to remove 2723 // it from the list yet. Otherwise, we can just immediately put 2724 // it in the destroyed state since we are not removing it from the 2725 // list. 2726 if (r.finishing && !skipDestroy) { 2727 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 2728 + " (destroy requested)"); 2729 r.state = ActivityState.DESTROYING; 2730 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 2731 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 2732 } else { 2733 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 2734 r.state = ActivityState.DESTROYED; 2735 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 2736 r.app = null; 2737 } 2738 } else { 2739 // remove this record from the history. 2740 if (r.finishing) { 2741 removeActivityFromHistoryLocked(r); 2742 removedFromHistory = true; 2743 } else { 2744 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 2745 r.state = ActivityState.DESTROYED; 2746 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 2747 r.app = null; 2748 } 2749 } 2750 2751 r.configChangeFlags = 0; 2752 2753 if (!mLRUActivities.remove(r) && hadApp) { 2754 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 2755 } 2756 2757 return removedFromHistory; 2758 } 2759 2760 final void activityDestroyedLocked(IBinder token) { 2761 final long origId = Binder.clearCallingIdentity(); 2762 try { 2763 ActivityRecord r = ActivityRecord.forToken(token); 2764 if (r != null) { 2765 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2766 } 2767 2768 if (isInStackLocked(token) != null) { 2769 if (r.state == ActivityState.DESTROYING) { 2770 cleanUpActivityLocked(r, true, false); 2771 removeActivityFromHistoryLocked(r); 2772 } 2773 } 2774 mStackSupervisor.resumeTopActivitiesLocked(); 2775 } finally { 2776 Binder.restoreCallingIdentity(origId); 2777 } 2778 } 2779 2780 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 2781 ProcessRecord app, String listName) { 2782 int i = list.size(); 2783 if (DEBUG_CLEANUP) Slog.v( 2784 TAG, "Removing app " + app + " from list " + listName 2785 + " with " + i + " entries"); 2786 while (i > 0) { 2787 i--; 2788 ActivityRecord r = list.get(i); 2789 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 2790 if (r.app == app) { 2791 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 2792 list.remove(i); 2793 removeTimeoutsForActivityLocked(r); 2794 } 2795 } 2796 } 2797 2798 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 2799 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 2800 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 2801 "mStoppingActivities"); 2802 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 2803 "mGoingToSleepActivities"); 2804 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 2805 "mWaitingVisibleActivities"); 2806 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 2807 "mFinishingActivities"); 2808 2809 boolean hasVisibleActivities = false; 2810 2811 // Clean out the history list. 2812 int i = numActivities(); 2813 if (DEBUG_CLEANUP) Slog.v( 2814 TAG, "Removing app " + app + " from history with " + i + " entries"); 2815 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2816 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2817 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2818 final ActivityRecord r = activities.get(activityNdx); 2819 --i; 2820 if (DEBUG_CLEANUP) Slog.v( 2821 TAG, "Record #" + i + " " + r + ": app=" + r.app); 2822 if (r.app == app) { 2823 boolean remove; 2824 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 2825 // Don't currently have state for the activity, or 2826 // it is finishing -- always remove it. 2827 remove = true; 2828 } else if (r.launchCount > 2 && 2829 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 2830 // We have launched this activity too many times since it was 2831 // able to run, so give up and remove it. 2832 remove = true; 2833 } else { 2834 // The process may be gone, but the activity lives on! 2835 remove = false; 2836 } 2837 if (remove) { 2838 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 2839 RuntimeException here = new RuntimeException("here"); 2840 here.fillInStackTrace(); 2841 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 2842 + ": haveState=" + r.haveState 2843 + " stateNotNeeded=" + r.stateNotNeeded 2844 + " finishing=" + r.finishing 2845 + " state=" + r.state, here); 2846 } 2847 if (!r.finishing) { 2848 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 2849 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2850 r.userId, System.identityHashCode(r), 2851 r.task.taskId, r.shortComponentName, 2852 "proc died without state saved"); 2853 if (r.state == ActivityState.RESUMED) { 2854 mService.updateUsageStats(r, false); 2855 } 2856 } 2857 removeActivityFromHistoryLocked(r); 2858 2859 } else { 2860 // We have the current state for this activity, so 2861 // it can be restarted later when needed. 2862 if (localLOGV) Slog.v( 2863 TAG, "Keeping entry, setting app to null"); 2864 if (r.visible) { 2865 hasVisibleActivities = true; 2866 } 2867 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 2868 + r); 2869 r.app = null; 2870 r.nowVisible = false; 2871 if (!r.haveState) { 2872 if (DEBUG_SAVED_STATE) Slog.i(TAG, 2873 "App died, clearing saved state of " + r); 2874 r.icicle = null; 2875 } 2876 } 2877 2878 cleanUpActivityLocked(r, true, true); 2879 } 2880 } 2881 } 2882 2883 return hasVisibleActivities; 2884 } 2885 2886 final void updateTransitLocked(int transit, Bundle options) { 2887 if (options != null) { 2888 ActivityRecord r = topRunningActivityLocked(null); 2889 if (r != null && r.state != ActivityState.RESUMED) { 2890 r.updateOptionsLocked(options); 2891 } else { 2892 ActivityOptions.abort(options); 2893 } 2894 } 2895 mWindowManager.prepareAppTransition(transit, false); 2896 } 2897 2898 final boolean findTaskToMoveToFrontLocked(int taskId, int flags, Bundle options) { 2899 final TaskRecord task = taskForIdLocked(taskId); 2900 if (task != null) { 2901 if ((flags & ActivityManager.MOVE_TASK_NO_USER_ACTION) == 0) { 2902 mStackSupervisor.mUserLeaving = true; 2903 } 2904 if ((flags & ActivityManager.MOVE_TASK_WITH_HOME) != 0) { 2905 // Caller wants the home activity moved with it. To accomplish this, 2906 // we'll just indicate that this task returns to the home task. 2907 task.mActivities.get(0).mLaunchHomeTaskNext = true; 2908 } 2909 moveTaskToFrontLocked(task, null, options); 2910 return true; 2911 } 2912 return false; 2913 } 2914 2915 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 2916 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 2917 2918 final int numTasks = mTaskHistory.size(); 2919 final int index = mTaskHistory.indexOf(tr); 2920 if (numTasks == 0 || index < 0) { 2921 // nothing to do! 2922 if (reason != null && 2923 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2924 ActivityOptions.abort(options); 2925 } else { 2926 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 2927 } 2928 return; 2929 } 2930 2931 mStackSupervisor.moveHomeStack(isHomeStack()); 2932 2933 // Shift all activities with this task up to the top 2934 // of the stack, keeping them in the same internal order. 2935 insertTaskAtTop(tr); 2936 2937 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 2938 if (reason != null && 2939 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2940 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 2941 ActivityRecord r = topRunningActivityLocked(null); 2942 if (r != null) { 2943 mNoAnimActivities.add(r); 2944 } 2945 ActivityOptions.abort(options); 2946 } else { 2947 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 2948 } 2949 2950 mWindowManager.moveTaskToTop(tr.taskId); 2951 2952 mStackSupervisor.resumeTopActivitiesLocked(); 2953 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 2954 2955 if (VALIDATE_TOKENS) { 2956 validateAppTokensLocked(); 2957 } 2958 } 2959 2960 /** 2961 * Worker method for rearranging history stack. Implements the function of moving all 2962 * activities for a specific task (gathering them if disjoint) into a single group at the 2963 * bottom of the stack. 2964 * 2965 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 2966 * to premeptively cancel the move. 2967 * 2968 * @param task The taskId to collect and move to the bottom. 2969 * @return Returns true if the move completed, false if not. 2970 */ 2971 final boolean moveTaskToBackLocked(int task, ActivityRecord reason) { 2972 Slog.i(TAG, "moveTaskToBack: " + task); 2973 2974 // If we have a watcher, preflight the move before committing to it. First check 2975 // for *other* available tasks, but if none are available, then try again allowing the 2976 // current task to be selected. 2977 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 2978 ActivityRecord next = topRunningActivityLocked(null, task); 2979 if (next == null) { 2980 next = topRunningActivityLocked(null, 0); 2981 } 2982 if (next != null) { 2983 // ask watcher if this is allowed 2984 boolean moveOK = true; 2985 try { 2986 moveOK = mService.mController.activityResuming(next.packageName); 2987 } catch (RemoteException e) { 2988 mService.mController = null; 2989 Watchdog.getInstance().setActivityController(null); 2990 } 2991 if (!moveOK) { 2992 return false; 2993 } 2994 } 2995 } 2996 2997 if (DEBUG_TRANSITION) Slog.v(TAG, 2998 "Prepare to back transition: task=" + task); 2999 3000 final TaskRecord tr = taskForIdLocked(task); 3001 if (tr == null) { 3002 return false; 3003 } 3004 mTaskHistory.remove(tr); 3005 mTaskHistory.add(0, tr); 3006 3007 if (reason != null && 3008 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3009 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3010 ActivityRecord r = topRunningActivityLocked(null); 3011 if (r != null) { 3012 mNoAnimActivities.add(r); 3013 } 3014 } else { 3015 mWindowManager.prepareAppTransition( 3016 AppTransition.TRANSIT_TASK_TO_BACK, false); 3017 } 3018 mWindowManager.moveTaskToBottom(task); 3019 3020 if (VALIDATE_TOKENS) { 3021 validateAppTokensLocked(); 3022 } 3023 3024 if (mResumedActivity != null && mResumedActivity.task == tr && 3025 mResumedActivity.mLaunchHomeTaskNext) { 3026 // TODO: Can we skip the next line and just pass mResumedAct. to resumeHomeAct.()? 3027 mResumedActivity.mLaunchHomeTaskNext = false; 3028 return mStackSupervisor.resumeHomeActivity(null); 3029 } 3030 3031 mStackSupervisor.resumeTopActivitiesLocked(); 3032 return true; 3033 } 3034 3035 static final void logStartActivity(int tag, ActivityRecord r, 3036 TaskRecord task) { 3037 final Uri data = r.intent.getData(); 3038 final String strData = data != null ? data.toSafeString() : null; 3039 3040 EventLog.writeEvent(tag, 3041 r.userId, System.identityHashCode(r), task.taskId, 3042 r.shortComponentName, r.intent.getAction(), 3043 r.intent.getType(), strData, r.intent.getFlags()); 3044 } 3045 3046 /** 3047 * Make sure the given activity matches the current configuration. Returns 3048 * false if the activity had to be destroyed. Returns true if the 3049 * configuration is the same, or the activity will remain running as-is 3050 * for whatever reason. Ensures the HistoryRecord is updated with the 3051 * correct configuration and all other bookkeeping is handled. 3052 */ 3053 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3054 int globalChanges) { 3055 if (mConfigWillChange) { 3056 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3057 "Skipping config check (will change): " + r); 3058 return true; 3059 } 3060 3061 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3062 "Ensuring correct configuration: " + r); 3063 3064 // Short circuit: if the two configurations are the exact same 3065 // object (the common case), then there is nothing to do. 3066 Configuration newConfig = mService.mConfiguration; 3067 if (r.configuration == newConfig && !r.forceNewConfig) { 3068 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3069 "Configuration unchanged in " + r); 3070 return true; 3071 } 3072 3073 // We don't worry about activities that are finishing. 3074 if (r.finishing) { 3075 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3076 "Configuration doesn't matter in finishing " + r); 3077 r.stopFreezingScreenLocked(false); 3078 return true; 3079 } 3080 3081 // Okay we now are going to make this activity have the new config. 3082 // But then we need to figure out how it needs to deal with that. 3083 Configuration oldConfig = r.configuration; 3084 r.configuration = newConfig; 3085 3086 // Determine what has changed. May be nothing, if this is a config 3087 // that has come back from the app after going idle. In that case 3088 // we just want to leave the official config object now in the 3089 // activity and do nothing else. 3090 final int changes = oldConfig.diff(newConfig); 3091 if (changes == 0 && !r.forceNewConfig) { 3092 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3093 "Configuration no differences in " + r); 3094 return true; 3095 } 3096 3097 // If the activity isn't currently running, just leave the new 3098 // configuration and it will pick that up next time it starts. 3099 if (r.app == null || r.app.thread == null) { 3100 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3101 "Configuration doesn't matter not running " + r); 3102 r.stopFreezingScreenLocked(false); 3103 r.forceNewConfig = false; 3104 return true; 3105 } 3106 3107 // Figure out how to handle the changes between the configurations. 3108 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3109 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3110 + Integer.toHexString(changes) + ", handles=0x" 3111 + Integer.toHexString(r.info.getRealConfigChanged()) 3112 + ", newConfig=" + newConfig); 3113 } 3114 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3115 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3116 r.configChangeFlags |= changes; 3117 r.startFreezingScreenLocked(r.app, globalChanges); 3118 r.forceNewConfig = false; 3119 if (r.app == null || r.app.thread == null) { 3120 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3121 "Config is destroying non-running " + r); 3122 destroyActivityLocked(r, true, false, "config"); 3123 } else if (r.state == ActivityState.PAUSING) { 3124 // A little annoying: we are waiting for this activity to 3125 // finish pausing. Let's not do anything now, but just 3126 // flag that it needs to be restarted when done pausing. 3127 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3128 "Config is skipping already pausing " + r); 3129 r.configDestroy = true; 3130 return true; 3131 } else if (r.state == ActivityState.RESUMED) { 3132 // Try to optimize this case: the configuration is changing 3133 // and we need to restart the top, resumed activity. 3134 // Instead of doing the normal handshaking, just say 3135 // "restart!". 3136 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3137 "Config is relaunching resumed " + r); 3138 relaunchActivityLocked(r, r.configChangeFlags, true); 3139 r.configChangeFlags = 0; 3140 } else { 3141 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3142 "Config is relaunching non-resumed " + r); 3143 relaunchActivityLocked(r, r.configChangeFlags, false); 3144 r.configChangeFlags = 0; 3145 } 3146 3147 // All done... tell the caller we weren't able to keep this 3148 // activity around. 3149 return false; 3150 } 3151 3152 // Default case: the activity can handle this new configuration, so 3153 // hand it over. Note that we don't need to give it the new 3154 // configuration, since we always send configuration changes to all 3155 // process when they happen so it can just use whatever configuration 3156 // it last got. 3157 if (r.app != null && r.app.thread != null) { 3158 try { 3159 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3160 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3161 } catch (RemoteException e) { 3162 // If process died, whatever. 3163 } 3164 } 3165 r.stopFreezingScreenLocked(false); 3166 3167 return true; 3168 } 3169 3170 private final boolean relaunchActivityLocked(ActivityRecord r, 3171 int changes, boolean andResume) { 3172 List<ResultInfo> results = null; 3173 List<Intent> newIntents = null; 3174 if (andResume) { 3175 results = r.results; 3176 newIntents = r.newIntents; 3177 } 3178 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3179 + " with results=" + results + " newIntents=" + newIntents 3180 + " andResume=" + andResume); 3181 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3182 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3183 r.task.taskId, r.shortComponentName); 3184 3185 r.startFreezingScreenLocked(r.app, 0); 3186 3187 try { 3188 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3189 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3190 + r); 3191 r.forceNewConfig = false; 3192 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3193 changes, !andResume, new Configuration(mService.mConfiguration)); 3194 // Note: don't need to call pauseIfSleepingLocked() here, because 3195 // the caller will only pass in 'andResume' if this activity is 3196 // currently resumed, which implies we aren't sleeping. 3197 } catch (RemoteException e) { 3198 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3199 } 3200 3201 if (andResume) { 3202 r.results = null; 3203 r.newIntents = null; 3204 r.state = ActivityState.RESUMED; 3205 } else { 3206 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3207 r.state = ActivityState.PAUSED; 3208 } 3209 3210 return true; 3211 } 3212 3213 boolean willActivityBeVisibleLocked(IBinder token) { 3214 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3215 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3216 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3217 final ActivityRecord r = activities.get(activityNdx); 3218 if (r.appToken == token) { 3219 return true; 3220 } 3221 if (r.fullscreen && !r.finishing) { 3222 return false; 3223 } 3224 } 3225 } 3226 return true; 3227 } 3228 3229 void closeSystemDialogsLocked() { 3230 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3231 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3232 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3233 final ActivityRecord r = activities.get(activityNdx); 3234 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3235 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3236 } 3237 } 3238 } 3239 } 3240 3241 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3242 boolean didSomething = false; 3243 TaskRecord lastTask = null; 3244 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3245 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3246 int numActivities = activities.size(); 3247 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3248 ActivityRecord r = activities.get(activityNdx); 3249 final boolean samePackage = r.packageName.equals(name) 3250 || (name == null && r.userId == userId); 3251 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3252 && (samePackage || r.task == lastTask) 3253 && (r.app == null || evenPersistent || !r.app.persistent)) { 3254 if (!doit) { 3255 if (r.finishing) { 3256 // If this activity is just finishing, then it is not 3257 // interesting as far as something to stop. 3258 continue; 3259 } 3260 return true; 3261 } 3262 didSomething = true; 3263 Slog.i(TAG, " Force finishing activity " + r); 3264 if (samePackage) { 3265 if (r.app != null) { 3266 r.app.removed = true; 3267 } 3268 r.app = null; 3269 } 3270 lastTask = r.task; 3271 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3272 true)) { 3273 // r has been deleted from mActivities, accommodate. 3274 --numActivities; 3275 --activityNdx; 3276 } 3277 } 3278 } 3279 } 3280 return didSomething; 3281 } 3282 3283 ActivityRecord getTasksLocked(int maxNum, IThumbnailReceiver receiver, 3284 PendingThumbnailsRecord pending, List<RunningTaskInfo> list) { 3285 ActivityRecord topRecord = null; 3286 for (int taskNdx = mTaskHistory.size() - 1; maxNum > 0 && taskNdx >= 0; 3287 --maxNum, --taskNdx) { 3288 final TaskRecord task = mTaskHistory.get(taskNdx); 3289 ActivityRecord r = null; 3290 ActivityRecord top = null; 3291 int numActivities = 0; 3292 int numRunning = 0; 3293 final ArrayList<ActivityRecord> activities = task.mActivities; 3294 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3295 r = activities.get(activityNdx); 3296 3297 // Initialize state for next task if needed. 3298 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3299 top = r; 3300 numActivities = numRunning = 0; 3301 } 3302 3303 // Add 'r' into the current task. 3304 numActivities++; 3305 if (r.app != null && r.app.thread != null) { 3306 numRunning++; 3307 } 3308 3309 if (localLOGV) Slog.v( 3310 TAG, r.intent.getComponent().flattenToShortString() 3311 + ": task=" + r.task); 3312 } 3313 3314 RunningTaskInfo ci = new RunningTaskInfo(); 3315 ci.id = task.taskId; 3316 ci.baseActivity = r.intent.getComponent(); 3317 ci.topActivity = top.intent.getComponent(); 3318 if (top.thumbHolder != null) { 3319 ci.description = top.thumbHolder.lastDescription; 3320 } 3321 ci.numActivities = numActivities; 3322 ci.numRunning = numRunning; 3323 //System.out.println( 3324 // "#" + maxNum + ": " + " descr=" + ci.description); 3325 if (receiver != null) { 3326 if (localLOGV) Slog.v( 3327 TAG, "State=" + top.state + "Idle=" + top.idle 3328 + " app=" + top.app 3329 + " thr=" + (top.app != null ? top.app.thread : null)); 3330 if (top.state == ActivityState.RESUMED || top.state == ActivityState.PAUSING) { 3331 if (top.idle && top.app != null && top.app.thread != null) { 3332 topRecord = top; 3333 } else { 3334 top.thumbnailNeeded = true; 3335 } 3336 } 3337 pending.pendingRecords.add(top); 3338 } 3339 list.add(ci); 3340 } 3341 return topRecord; 3342 } 3343 3344 public void unhandledBackLocked() { 3345 final int top = mTaskHistory.size() - 1; 3346 if (DEBUG_SWITCH) Slog.d( 3347 TAG, "Performing unhandledBack(): top activity at " + top); 3348 if (top >= 0) { 3349 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3350 int activityTop = activities.size() - 1; 3351 if (activityTop > 0) { 3352 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3353 "unhandled-back", true); 3354 } 3355 } 3356 } 3357 3358 void handleAppDiedLocked(ProcessRecord app, boolean restarting) { 3359 if (!containsApp(app)) { 3360 return; 3361 } 3362 // TODO: handle the case where an app spans multiple stacks. 3363 if (mPausingActivity != null && mPausingActivity.app == app) { 3364 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3365 "App died while pausing: " + mPausingActivity); 3366 mPausingActivity = null; 3367 } 3368 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3369 mLastPausedActivity = null; 3370 } 3371 final ActivityRecord top = topRunningActivityLocked(null); 3372 final boolean launchHomeTaskNext = 3373 top != null && top.app == app && top.mLaunchHomeTaskNext; 3374 3375 // Remove this application's activities from active lists. 3376 boolean hasVisibleActivities = removeHistoryRecordsForAppLocked(app); 3377 3378 if (!restarting) { 3379 ActivityStack stack = mStackSupervisor.getFocusedStack(); 3380 if (stack == null || launchHomeTaskNext) { 3381 mStackSupervisor.resumeHomeActivity(null); 3382 } else if (!mStackSupervisor.resumeTopActivitiesLocked(stack, null, null)) { 3383 // If there was nothing to resume, and we are not already 3384 // restarting this process, but there is a visible activity that 3385 // is hosted by the process... then make sure all visible 3386 // activities are running, taking care of restarting this 3387 // process. 3388 if (hasVisibleActivities) { 3389 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0); 3390 } 3391 } 3392 } 3393 } 3394 3395 void handleAppCrashLocked(ProcessRecord app) { 3396 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3397 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3398 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3399 final ActivityRecord r = activities.get(activityNdx); 3400 if (r.app == app) { 3401 Slog.w(TAG, " Force finishing activity " 3402 + r.intent.getComponent().flattenToShortString()); 3403 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 3404 } 3405 } 3406 } 3407 } 3408 3409 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3410 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3411 boolean printed = false; 3412 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3413 final TaskRecord task = mTaskHistory.get(taskNdx); 3414 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3415 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3416 dumpClient, dumpPackage, needSep, header, 3417 " Task id #" + task.taskId); 3418 if (printed) { 3419 header = null; 3420 } 3421 } 3422 return printed; 3423 } 3424 3425 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3426 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3427 3428 if ("all".equals(name)) { 3429 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3430 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3431 } 3432 } else if ("top".equals(name)) { 3433 final int top = mTaskHistory.size() - 1; 3434 if (top >= 0) { 3435 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3436 int listTop = list.size() - 1; 3437 if (listTop >= 0) { 3438 activities.add(list.get(listTop)); 3439 } 3440 } 3441 } else { 3442 ItemMatcher matcher = new ItemMatcher(); 3443 matcher.build(name); 3444 3445 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3446 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3447 if (matcher.match(r1, r1.intent.getComponent())) { 3448 activities.add(r1); 3449 } 3450 } 3451 } 3452 } 3453 3454 return activities; 3455 } 3456 3457 ActivityRecord restartPackage(String packageName) { 3458 ActivityRecord starting = topRunningActivityLocked(null); 3459 3460 // All activities that came from the package must be 3461 // restarted as if there was a config change. 3462 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3463 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3464 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3465 final ActivityRecord a = activities.get(activityNdx); 3466 if (a.info.packageName.equals(packageName)) { 3467 a.forceNewConfig = true; 3468 if (starting != null && a == starting && a.visible) { 3469 a.startFreezingScreenLocked(starting.app, 3470 ActivityInfo.CONFIG_SCREEN_LAYOUT); 3471 } 3472 } 3473 } 3474 } 3475 3476 return starting; 3477 } 3478 3479 boolean removeTask(TaskRecord task) { 3480 mTaskHistory.remove(task); 3481 return mTaskHistory.size() == 0; 3482 } 3483 3484 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, boolean toTop) { 3485 TaskRecord task = new TaskRecord(taskId, info, intent); 3486 addTask(task, toTop); 3487 return task; 3488 } 3489 3490 ArrayList<TaskRecord> getAllTasks() { 3491 return new ArrayList<TaskRecord>(mTaskHistory); 3492 } 3493 3494 void addTask(final TaskRecord task, final boolean toTop) { 3495 task.stack = this; 3496 if (toTop) { 3497 insertTaskAtTop(task); 3498 } else { 3499 mTaskHistory.add(0, task); 3500 } 3501 } 3502 3503 public int getStackId() { 3504 return mStackId; 3505 } 3506 3507 @Override 3508 public String toString() { 3509 return "stackId=" + mStackId + " tasks=" + mTaskHistory; 3510 } 3511} 3512