ActivityStack.java revision 89ad456ea49cb62615ebdcac83a2515743bbe5fa
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.am; 18 19import static com.android.server.am.ActivityManagerService.TAG; 20import static com.android.server.am.ActivityManagerService.localLOGV; 21import static com.android.server.am.ActivityManagerService.DEBUG_CLEANUP; 22import static com.android.server.am.ActivityManagerService.DEBUG_CONFIGURATION; 23import static com.android.server.am.ActivityManagerService.DEBUG_PAUSE; 24import static com.android.server.am.ActivityManagerService.DEBUG_RESULTS; 25import static com.android.server.am.ActivityManagerService.DEBUG_STACK; 26import static com.android.server.am.ActivityManagerService.DEBUG_SWITCH; 27import static com.android.server.am.ActivityManagerService.DEBUG_TASKS; 28import static com.android.server.am.ActivityManagerService.DEBUG_TRANSITION; 29import static com.android.server.am.ActivityManagerService.DEBUG_USER_LEAVING; 30import static com.android.server.am.ActivityManagerService.DEBUG_VISBILITY; 31import static com.android.server.am.ActivityManagerService.VALIDATE_TOKENS; 32 33import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 34import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 35 36import static com.android.server.am.ActivityStackSupervisor.DEBUG_ADD_REMOVE; 37import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP; 38import static com.android.server.am.ActivityStackSupervisor.DEBUG_CONTAINERS; 39import static com.android.server.am.ActivityStackSupervisor.DEBUG_RELEASE; 40import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 41import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS; 42import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 43import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 44 45import android.util.ArraySet; 46import com.android.internal.app.IVoiceInteractor; 47import com.android.internal.os.BatteryStatsImpl; 48import com.android.server.Watchdog; 49import com.android.server.am.ActivityManagerService.ItemMatcher; 50import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 51import com.android.server.wm.AppTransition; 52import com.android.server.wm.TaskGroup; 53import com.android.server.wm.WindowManagerService; 54 55import android.app.Activity; 56import android.app.ActivityManager; 57import android.app.ActivityOptions; 58import android.app.AppGlobals; 59import android.app.IActivityController; 60import android.app.ResultInfo; 61import android.app.ActivityManager.RunningTaskInfo; 62import android.content.ComponentName; 63import android.content.Intent; 64import android.content.pm.ActivityInfo; 65import android.content.pm.PackageManager; 66import android.content.res.Configuration; 67import android.content.res.Resources; 68import android.graphics.Bitmap; 69import android.net.Uri; 70import android.os.Binder; 71import android.os.Bundle; 72import android.os.Debug; 73import android.os.Handler; 74import android.os.IBinder; 75import android.os.Looper; 76import android.os.Message; 77import android.os.PersistableBundle; 78import android.os.RemoteException; 79import android.os.SystemClock; 80import android.os.Trace; 81import android.os.UserHandle; 82import android.service.voice.IVoiceInteractionSession; 83import android.util.EventLog; 84import android.util.Slog; 85import android.view.Display; 86 87import java.io.FileDescriptor; 88import java.io.PrintWriter; 89import java.lang.ref.WeakReference; 90import java.util.ArrayList; 91import java.util.Iterator; 92import java.util.List; 93import java.util.Objects; 94 95/** 96 * State and management of a single stack of activities. 97 */ 98final class ActivityStack { 99 100 // Ticks during which we check progress while waiting for an app to launch. 101 static final int LAUNCH_TICK = 500; 102 103 // How long we wait until giving up on the last activity to pause. This 104 // is short because it directly impacts the responsiveness of starting the 105 // next activity. 106 static final int PAUSE_TIMEOUT = 500; 107 108 // How long we wait for the activity to tell us it has stopped before 109 // giving up. This is a good amount of time because we really need this 110 // from the application in order to get its saved state. 111 static final int STOP_TIMEOUT = 10*1000; 112 113 // How long we wait until giving up on an activity telling us it has 114 // finished destroying itself. 115 static final int DESTROY_TIMEOUT = 10*1000; 116 117 // How long until we reset a task when the user returns to it. Currently 118 // disabled. 119 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 120 121 // How long between activity launches that we consider safe to not warn 122 // the user about an unexpected activity being launched on top. 123 static final long START_WARN_TIME = 5*1000; 124 125 // Set to false to disable the preview that is shown while a new activity 126 // is being started. 127 static final boolean SHOW_APP_STARTING_PREVIEW = true; 128 129 // How long to wait for all background Activities to redraw following a call to 130 // convertToTranslucent(). 131 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 132 133 static final boolean SCREENSHOT_FORCE_565 = ActivityManager.isLowRamDeviceStatic(); 134 135 enum ActivityState { 136 INITIALIZING, 137 RESUMED, 138 PAUSING, 139 PAUSED, 140 STOPPING, 141 STOPPED, 142 FINISHING, 143 DESTROYING, 144 DESTROYED 145 } 146 147 final ActivityManagerService mService; 148 final WindowManagerService mWindowManager; 149 150 /** 151 * The back history of all previous (and possibly still 152 * running) activities. It contains #TaskRecord objects. 153 */ 154 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<TaskRecord>(); 155 156 /** 157 * Used for validating app tokens with window manager. 158 */ 159 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<TaskGroup>(); 160 161 /** 162 * List of running activities, sorted by recent usage. 163 * The first entry in the list is the least recently used. 164 * It contains HistoryRecord objects. 165 */ 166 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<ActivityRecord>(); 167 168 /** 169 * Animations that for the current transition have requested not to 170 * be considered for the transition animation. 171 */ 172 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<ActivityRecord>(); 173 174 /** 175 * When we are in the process of pausing an activity, before starting the 176 * next one, this variable holds the activity that is currently being paused. 177 */ 178 ActivityRecord mPausingActivity = null; 179 180 /** 181 * This is the last activity that we put into the paused state. This is 182 * used to determine if we need to do an activity transition while sleeping, 183 * when we normally hold the top activity paused. 184 */ 185 ActivityRecord mLastPausedActivity = null; 186 187 /** 188 * Activities that specify No History must be removed once the user navigates away from them. 189 * If the device goes to sleep with such an activity in the paused state then we save it here 190 * and finish it later if another activity replaces it on wakeup. 191 */ 192 ActivityRecord mLastNoHistoryActivity = null; 193 194 /** 195 * Current activity that is resumed, or null if there is none. 196 */ 197 ActivityRecord mResumedActivity = null; 198 199 /** 200 * This is the last activity that has been started. It is only used to 201 * identify when multiple activities are started at once so that the user 202 * can be warned they may not be in the activity they think they are. 203 */ 204 ActivityRecord mLastStartedActivity = null; 205 206 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 207 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 208 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 209 // Activity in mTranslucentActivityWaiting is notified via 210 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 211 // background activity being drawn then the same call will be made with a true value. 212 ActivityRecord mTranslucentActivityWaiting = null; 213 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 214 new ArrayList<ActivityRecord>(); 215 216 /** 217 * Set when we know we are going to be calling updateConfiguration() 218 * soon, so want to skip intermediate config checks. 219 */ 220 boolean mConfigWillChange; 221 222 long mLaunchStartTime = 0; 223 long mFullyDrawnStartTime = 0; 224 225 /** 226 * Save the most recent screenshot for reuse. This keeps Recents from taking two identical 227 * screenshots, one for the Recents thumbnail and one for the pauseActivity thumbnail. 228 */ 229 private ActivityRecord mLastScreenshotActivity = null; 230 private Bitmap mLastScreenshotBitmap = null; 231 232 int mThumbnailWidth = -1; 233 int mThumbnailHeight = -1; 234 235 int mCurrentUser; 236 237 final int mStackId; 238 final ActivityContainer mActivityContainer; 239 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 240 ArrayList<ActivityStack> mStacks; 241 /** The attached Display's unique identifier, or -1 if detached */ 242 int mDisplayId; 243 244 /** Run all ActivityStacks through this */ 245 final ActivityStackSupervisor mStackSupervisor; 246 247 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 248 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 249 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 250 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 251 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 252 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 253 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 254 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 255 256 static class ScheduleDestroyArgs { 257 final ProcessRecord mOwner; 258 final String mReason; 259 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 260 mOwner = owner; 261 mReason = reason; 262 } 263 } 264 265 final Handler mHandler; 266 267 final class ActivityStackHandler extends Handler { 268 //public Handler() { 269 // if (localLOGV) Slog.v(TAG, "Handler started!"); 270 //} 271 ActivityStackHandler(Looper looper) { 272 super(looper); 273 } 274 275 @Override 276 public void handleMessage(Message msg) { 277 switch (msg.what) { 278 case PAUSE_TIMEOUT_MSG: { 279 ActivityRecord r = (ActivityRecord)msg.obj; 280 // We don't at this point know if the activity is fullscreen, 281 // so we need to be conservative and assume it isn't. 282 Slog.w(TAG, "Activity pause timeout for " + r); 283 synchronized (mService) { 284 if (r.app != null) { 285 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 286 } 287 activityPausedLocked(r.appToken, true, r.persistentState); 288 } 289 } break; 290 case LAUNCH_TICK_MSG: { 291 ActivityRecord r = (ActivityRecord)msg.obj; 292 synchronized (mService) { 293 if (r.continueLaunchTickingLocked()) { 294 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 295 } 296 } 297 } break; 298 case DESTROY_TIMEOUT_MSG: { 299 ActivityRecord r = (ActivityRecord)msg.obj; 300 // We don't at this point know if the activity is fullscreen, 301 // so we need to be conservative and assume it isn't. 302 Slog.w(TAG, "Activity destroy timeout for " + r); 303 synchronized (mService) { 304 activityDestroyedLocked(r != null ? r.appToken : null); 305 } 306 } break; 307 case STOP_TIMEOUT_MSG: { 308 ActivityRecord r = (ActivityRecord)msg.obj; 309 // We don't at this point know if the activity is fullscreen, 310 // so we need to be conservative and assume it isn't. 311 Slog.w(TAG, "Activity stop timeout for " + r); 312 synchronized (mService) { 313 if (r.isInHistory()) { 314 activityStoppedLocked(r, null, null, null); 315 } 316 } 317 } break; 318 case DESTROY_ACTIVITIES_MSG: { 319 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 320 synchronized (mService) { 321 destroyActivitiesLocked(args.mOwner, args.mReason); 322 } 323 } break; 324 case TRANSLUCENT_TIMEOUT_MSG: { 325 synchronized (mService) { 326 notifyActivityDrawnLocked(null); 327 } 328 } break; 329 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 330 synchronized (mService) { 331 final ActivityRecord r = getVisibleBehindActivity(); 332 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 333 if (r != null) { 334 mService.killAppAtUsersRequest(r.app, null); 335 } 336 } 337 } break; 338 } 339 } 340 } 341 342 int numActivities() { 343 int count = 0; 344 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 345 count += mTaskHistory.get(taskNdx).mActivities.size(); 346 } 347 return count; 348 } 349 350 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer) { 351 mActivityContainer = activityContainer; 352 mStackSupervisor = activityContainer.getOuter(); 353 mService = mStackSupervisor.mService; 354 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 355 mWindowManager = mService.mWindowManager; 356 mStackId = activityContainer.mStackId; 357 mCurrentUser = mService.mCurrentUserId; 358 // Get the activity screenshot thumbnail dimensions 359 Resources res = mService.mContext.getResources(); 360 mThumbnailWidth = mService.mThumbnailWidth; 361 mThumbnailHeight = mService.mThumbnailHeight; 362 } 363 364 /** 365 * Checks whether the userid is a profile of the current user. 366 */ 367 private boolean isCurrentProfileLocked(int userId) { 368 if (userId == mCurrentUser) return true; 369 for (int i = 0; i < mService.mCurrentProfileIds.length; i++) { 370 if (mService.mCurrentProfileIds[i] == userId) return true; 371 } 372 return false; 373 } 374 375 boolean okToShowLocked(ActivityRecord r) { 376 return isCurrentProfileLocked(r.userId) 377 || (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0; 378 } 379 380 final ActivityRecord topRunningActivityLocked(ActivityRecord notTop) { 381 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 382 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(notTop); 383 if (r != null) { 384 return r; 385 } 386 } 387 return null; 388 } 389 390 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 391 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 392 final TaskRecord task = mTaskHistory.get(taskNdx); 393 final ArrayList<ActivityRecord> activities = task.mActivities; 394 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 395 ActivityRecord r = activities.get(activityNdx); 396 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 397 return r; 398 } 399 } 400 } 401 return null; 402 } 403 404 /** 405 * This is a simplified version of topRunningActivityLocked that provides a number of 406 * optional skip-over modes. It is intended for use with the ActivityController hook only. 407 * 408 * @param token If non-null, any history records matching this token will be skipped. 409 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 410 * 411 * @return Returns the HistoryRecord of the next activity on the stack. 412 */ 413 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 414 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 415 TaskRecord task = mTaskHistory.get(taskNdx); 416 if (task.taskId == taskId) { 417 continue; 418 } 419 ArrayList<ActivityRecord> activities = task.mActivities; 420 for (int i = activities.size() - 1; i >= 0; --i) { 421 final ActivityRecord r = activities.get(i); 422 // Note: the taskId check depends on real taskId fields being non-zero 423 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 424 return r; 425 } 426 } 427 } 428 return null; 429 } 430 431 final ActivityRecord topActivity() { 432 // Iterate to find the first non-empty task stack. Note that this code can 433 // be simplified once we stop storing tasks with empty mActivities lists. 434 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 435 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 436 final int topActivityNdx = activities.size() - 1; 437 if (topActivityNdx >= 0) { 438 return activities.get(topActivityNdx); 439 } 440 } 441 return null; 442 } 443 444 final TaskRecord topTask() { 445 final int size = mTaskHistory.size(); 446 if (size > 0) { 447 return mTaskHistory.get(size - 1); 448 } 449 return null; 450 } 451 452 TaskRecord taskForIdLocked(int id) { 453 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 454 final TaskRecord task = mTaskHistory.get(taskNdx); 455 if (task.taskId == id) { 456 return task; 457 } 458 } 459 return null; 460 } 461 462 ActivityRecord isInStackLocked(IBinder token) { 463 final ActivityRecord r = ActivityRecord.forToken(token); 464 if (r != null) { 465 final TaskRecord task = r.task; 466 if (task.mActivities.contains(r) && mTaskHistory.contains(task)) { 467 if (task.stack != this) Slog.w(TAG, 468 "Illegal state! task does not point to stack it is in."); 469 return r; 470 } 471 } 472 return null; 473 } 474 475 final boolean updateLRUListLocked(ActivityRecord r) { 476 final boolean hadit = mLRUActivities.remove(r); 477 mLRUActivities.add(r); 478 return hadit; 479 } 480 481 final boolean isHomeStack() { 482 return mStackId == HOME_STACK_ID; 483 } 484 485 final boolean isOnHomeDisplay() { 486 return isAttached() && 487 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 488 } 489 490 final void moveToFront() { 491 if (isAttached()) { 492 if (isOnHomeDisplay()) { 493 mStackSupervisor.moveHomeStack(isHomeStack()); 494 } 495 mStacks.remove(this); 496 mStacks.add(this); 497 } 498 } 499 500 final boolean isAttached() { 501 return mStacks != null; 502 } 503 504 /** 505 * Returns the top activity in any existing task matching the given 506 * Intent. Returns null if no such task is found. 507 */ 508 ActivityRecord findTaskLocked(ActivityRecord target) { 509 Intent intent = target.intent; 510 ActivityInfo info = target.info; 511 ComponentName cls = intent.getComponent(); 512 if (info.targetActivity != null) { 513 cls = new ComponentName(info.packageName, info.targetActivity); 514 } 515 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 516 boolean isDocument = intent != null & intent.isDocument(); 517 // If documentData is non-null then it must match the existing task data. 518 Uri documentData = isDocument ? intent.getData() : null; 519 520 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 521 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 522 final TaskRecord task = mTaskHistory.get(taskNdx); 523 if (task.voiceSession != null) { 524 // We never match voice sessions; those always run independently. 525 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 526 continue; 527 } 528 if (task.userId != userId) { 529 // Looking for a different task. 530 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 531 continue; 532 } 533 final ActivityRecord r = task.getTopActivity(); 534 if (r == null || r.finishing || r.userId != userId || 535 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 536 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 537 continue; 538 } 539 540 final Intent taskIntent = task.intent; 541 final Intent affinityIntent = task.affinityIntent; 542 final boolean taskIsDocument; 543 final Uri taskDocumentData; 544 if (taskIntent != null && taskIntent.isDocument()) { 545 taskIsDocument = true; 546 taskDocumentData = taskIntent.getData(); 547 } else if (affinityIntent != null && affinityIntent.isDocument()) { 548 taskIsDocument = true; 549 taskDocumentData = affinityIntent.getData(); 550 } else { 551 taskIsDocument = false; 552 taskDocumentData = null; 553 } 554 555 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 556 + taskIntent.getComponent().flattenToShortString() 557 + "/aff=" + r.task.affinity + " to new cls=" 558 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 559 if (!isDocument && !taskIsDocument && task.affinity != null) { 560 if (task.affinity.equals(target.taskAffinity)) { 561 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 562 return r; 563 } 564 } else if (taskIntent != null && taskIntent.getComponent() != null && 565 taskIntent.getComponent().compareTo(cls) == 0 && 566 Objects.equals(documentData, taskDocumentData)) { 567 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 568 //dump(); 569 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 570 + r.intent); 571 return r; 572 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 573 affinityIntent.getComponent().compareTo(cls) == 0 && 574 Objects.equals(documentData, taskDocumentData)) { 575 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 576 //dump(); 577 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 578 + r.intent); 579 return r; 580 } else if (DEBUG_TASKS) { 581 Slog.d(TAG, "Not a match: " + task); 582 } 583 } 584 585 return null; 586 } 587 588 /** 589 * Returns the first activity (starting from the top of the stack) that 590 * is the same as the given activity. Returns null if no such activity 591 * is found. 592 */ 593 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 594 ComponentName cls = intent.getComponent(); 595 if (info.targetActivity != null) { 596 cls = new ComponentName(info.packageName, info.targetActivity); 597 } 598 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 599 600 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 601 TaskRecord task = mTaskHistory.get(taskNdx); 602 if (!isCurrentProfileLocked(task.userId)) { 603 return null; 604 } 605 final ArrayList<ActivityRecord> activities = task.mActivities; 606 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 607 ActivityRecord r = activities.get(activityNdx); 608 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 609 //Slog.i(TAG, "Found matching class!"); 610 //dump(); 611 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 612 return r; 613 } 614 } 615 } 616 617 return null; 618 } 619 620 /* 621 * Move the activities around in the stack to bring a user to the foreground. 622 */ 623 final void switchUserLocked(int userId) { 624 if (mCurrentUser == userId) { 625 return; 626 } 627 mCurrentUser = userId; 628 629 // Move userId's tasks to the top. 630 int index = mTaskHistory.size(); 631 for (int i = 0; i < index; ) { 632 TaskRecord task = mTaskHistory.get(i); 633 if (isCurrentProfileLocked(task.userId)) { 634 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 635 " moving " + task + " to top"); 636 mTaskHistory.remove(i); 637 mTaskHistory.add(task); 638 --index; 639 // Use same value for i. 640 } else { 641 ++i; 642 } 643 } 644 if (VALIDATE_TOKENS) { 645 validateAppTokensLocked(); 646 } 647 } 648 649 void minimalResumeActivityLocked(ActivityRecord r) { 650 r.state = ActivityState.RESUMED; 651 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 652 + " (starting new instance)"); 653 r.stopped = false; 654 mResumedActivity = r; 655 r.task.touchActiveTime(); 656 mService.addRecentTaskLocked(r.task); 657 completeResumeLocked(r); 658 mStackSupervisor.checkReadyForSleepLocked(); 659 setLaunchTime(r); 660 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 661 } 662 663 private void startLaunchTraces() { 664 if (mFullyDrawnStartTime != 0) { 665 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 666 } 667 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 668 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 669 } 670 671 private void stopFullyDrawnTraceIfNeeded() { 672 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 673 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 674 mFullyDrawnStartTime = 0; 675 } 676 } 677 678 void setLaunchTime(ActivityRecord r) { 679 if (r.displayStartTime == 0) { 680 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 681 if (mLaunchStartTime == 0) { 682 startLaunchTraces(); 683 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 684 } 685 } else if (mLaunchStartTime == 0) { 686 startLaunchTraces(); 687 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 688 } 689 } 690 691 void clearLaunchTime(ActivityRecord r) { 692 // Make sure that there is no activity waiting for this to launch. 693 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 694 r.displayStartTime = r.fullyDrawnStartTime = 0; 695 } else { 696 mStackSupervisor.removeTimeoutsForActivityLocked(r); 697 mStackSupervisor.scheduleIdleTimeoutLocked(r); 698 } 699 } 700 701 void awakeFromSleepingLocked() { 702 // Ensure activities are no longer sleeping. 703 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 704 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 705 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 706 activities.get(activityNdx).setSleeping(false); 707 } 708 } 709 } 710 711 /** 712 * @return true if something must be done before going to sleep. 713 */ 714 boolean checkReadyForSleepLocked() { 715 if (mResumedActivity != null) { 716 // Still have something resumed; can't sleep until it is paused. 717 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 718 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 719 startPausingLocked(false, true); 720 return true; 721 } 722 if (mPausingActivity != null) { 723 // Still waiting for something to pause; can't sleep yet. 724 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 725 return true; 726 } 727 728 return false; 729 } 730 731 void goToSleep() { 732 ensureActivitiesVisibleLocked(null, 0); 733 734 // Make sure any stopped but visible activities are now sleeping. 735 // This ensures that the activity's onStop() is called. 736 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 737 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 738 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 739 final ActivityRecord r = activities.get(activityNdx); 740 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 741 r.setSleeping(true); 742 } 743 } 744 } 745 } 746 747 /** 748 * This resets the saved state from the last screenshot, forcing a new screenshot to be taken 749 * again when requested. 750 */ 751 private void invalidateLastScreenshot() { 752 mLastScreenshotActivity = null; 753 if (mLastScreenshotBitmap != null) { 754 mLastScreenshotBitmap.recycle(); 755 } 756 mLastScreenshotBitmap = null; 757 } 758 759 public final Bitmap screenshotActivities(ActivityRecord who) { 760 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 761 if (who.noDisplay) { 762 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 763 return null; 764 } 765 766 if (isHomeStack()) { 767 // This is an optimization -- since we never show Home or Recents within Recents itself, 768 // we can just go ahead and skip taking the screenshot if this is the home stack. In 769 // the case where the most recent task is not the task that was supplied, then the stack 770 // has changed, so invalidate the last screenshot(). 771 invalidateLastScreenshot(); 772 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tIs Home stack? " + isHomeStack()); 773 return null; 774 } 775 776 int w = mThumbnailWidth; 777 int h = mThumbnailHeight; 778 if (w > 0) { 779 if (who != mLastScreenshotActivity || mLastScreenshotBitmap == null 780 || mLastScreenshotActivity.state == ActivityState.RESUMED 781 || mLastScreenshotBitmap.getWidth() != w 782 || mLastScreenshotBitmap.getHeight() != h) { 783 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tUpdating screenshot"); 784 mLastScreenshotActivity = who; 785 mLastScreenshotBitmap = mWindowManager.screenshotApplications( 786 who.appToken, Display.DEFAULT_DISPLAY, w, h, SCREENSHOT_FORCE_565); 787 } 788 if (mLastScreenshotBitmap != null) { 789 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tReusing last screenshot"); 790 return mLastScreenshotBitmap.copy(mLastScreenshotBitmap.getConfig(), true); 791 } 792 } 793 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 794 return null; 795 } 796 797 final void startPausingLocked(boolean userLeaving, boolean uiSleeping) { 798 if (mPausingActivity != null) { 799 Slog.e(TAG, "Trying to pause when pause is already pending for " 800 + mPausingActivity, new RuntimeException("here").fillInStackTrace()); 801 } 802 ActivityRecord prev = mResumedActivity; 803 if (prev == null) { 804 Slog.e(TAG, "Trying to pause when nothing is resumed", 805 new RuntimeException("here").fillInStackTrace()); 806 mStackSupervisor.resumeTopActivitiesLocked(); 807 return; 808 } 809 810 if (mActivityContainer.mParentActivity == null) { 811 // Top level stack, not a child. Look for child stacks. 812 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping); 813 } 814 815 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 816 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 817 mResumedActivity = null; 818 mPausingActivity = prev; 819 mLastPausedActivity = prev; 820 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 821 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 822 prev.state = ActivityState.PAUSING; 823 prev.task.touchActiveTime(); 824 clearLaunchTime(prev); 825 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 826 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task)) { 827 prev.updateThumbnail(screenshotActivities(prev), null); 828 } 829 stopFullyDrawnTraceIfNeeded(); 830 831 mService.updateCpuStats(); 832 833 if (prev.app != null && prev.app.thread != null) { 834 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 835 try { 836 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 837 prev.userId, System.identityHashCode(prev), 838 prev.shortComponentName); 839 mService.updateUsageStats(prev, false); 840 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 841 userLeaving, prev.configChangeFlags); 842 } catch (Exception e) { 843 // Ignore exception, if process died other code will cleanup. 844 Slog.w(TAG, "Exception thrown during pause", e); 845 mPausingActivity = null; 846 mLastPausedActivity = null; 847 mLastNoHistoryActivity = null; 848 } 849 } else { 850 mPausingActivity = null; 851 mLastPausedActivity = null; 852 mLastNoHistoryActivity = null; 853 } 854 855 // If we are not going to sleep, we want to ensure the device is 856 // awake until the next activity is started. 857 if (!mService.isSleepingOrShuttingDown()) { 858 mStackSupervisor.acquireLaunchWakelock(); 859 } 860 861 if (mPausingActivity != null) { 862 // Have the window manager pause its key dispatching until the new 863 // activity has started. If we're pausing the activity just because 864 // the screen is being turned off and the UI is sleeping, don't interrupt 865 // key dispatch; the same activity will pick it up again on wakeup. 866 if (!uiSleeping) { 867 prev.pauseKeyDispatchingLocked(); 868 } else { 869 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 870 } 871 872 // Schedule a pause timeout in case the app doesn't respond. 873 // We don't give it much time because this directly impacts the 874 // responsiveness seen by the user. 875 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 876 msg.obj = prev; 877 prev.pauseTime = SystemClock.uptimeMillis(); 878 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 879 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 880 } else { 881 // This activity failed to schedule the 882 // pause, so just treat it as being paused now. 883 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 884 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 885 } 886 } 887 888 final void activityPausedLocked(IBinder token, boolean timeout, 889 PersistableBundle persistentState) { 890 if (DEBUG_PAUSE) Slog.v( 891 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 892 893 final ActivityRecord r = isInStackLocked(token); 894 if (r != null) { 895 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 896 if (persistentState != null) { 897 r.persistentState = persistentState; 898 mService.notifyTaskPersisterLocked(r.task, false); 899 } 900 if (mPausingActivity == r) { 901 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 902 + (timeout ? " (due to timeout)" : " (pause complete)")); 903 r.state = ActivityState.PAUSED; 904 completePauseLocked(); 905 } else { 906 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 907 r.userId, System.identityHashCode(r), r.shortComponentName, 908 mPausingActivity != null 909 ? mPausingActivity.shortComponentName : "(none)"); 910 } 911 } 912 } 913 914 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 915 PersistableBundle persistentState, CharSequence description) { 916 if (r.state != ActivityState.STOPPING) { 917 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 918 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 919 return; 920 } 921 if (persistentState != null) { 922 r.persistentState = persistentState; 923 mService.notifyTaskPersisterLocked(r.task, false); 924 } 925 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 926 if (icicle != null) { 927 // If icicle is null, this is happening due to a timeout, so we 928 // haven't really saved the state. 929 r.icicle = icicle; 930 r.haveState = true; 931 r.launchCount = 0; 932 r.updateThumbnail(null, description); 933 } 934 if (!r.stopped) { 935 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 936 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 937 r.stopped = true; 938 r.state = ActivityState.STOPPED; 939 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 940 mStackSupervisor.requestVisibleBehindLocked(r, false); 941 } 942 if (r.finishing) { 943 r.clearOptionsLocked(); 944 } else { 945 if (r.configDestroy) { 946 destroyActivityLocked(r, true, "stop-config"); 947 mStackSupervisor.resumeTopActivitiesLocked(); 948 } else { 949 mStackSupervisor.updatePreviousProcessLocked(r); 950 } 951 } 952 } 953 } 954 955 private void completePauseLocked() { 956 ActivityRecord prev = mPausingActivity; 957 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 958 959 if (prev != null) { 960 if (prev.finishing) { 961 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 962 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 963 } else if (prev.app != null) { 964 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 965 if (prev.waitingVisible) { 966 prev.waitingVisible = false; 967 mStackSupervisor.mWaitingVisibleActivities.remove(prev); 968 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 969 TAG, "Complete pause, no longer waiting: " + prev); 970 } 971 if (prev.configDestroy) { 972 // The previous is being paused because the configuration 973 // is changing, which means it is actually stopping... 974 // To juggle the fact that we are also starting a new 975 // instance right now, we need to first completely stop 976 // the current instance before starting the new one. 977 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 978 destroyActivityLocked(prev, true, "pause-config"); 979 } else if (!hasVisibleBehindActivity()) { 980 // If we were visible then resumeTopActivities will release resources before 981 // stopping. 982 mStackSupervisor.mStoppingActivities.add(prev); 983 if (mStackSupervisor.mStoppingActivities.size() > 3 || 984 prev.frontOfTask && mTaskHistory.size() <= 1) { 985 // If we already have a few activities waiting to stop, 986 // then give up on things going idle and start clearing 987 // them out. Or if r is the last of activity of the last task the stack 988 // will be empty and must be cleared immediately. 989 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 990 mStackSupervisor.scheduleIdleLocked(); 991 } else { 992 mStackSupervisor.checkReadyForSleepLocked(); 993 } 994 } 995 } else { 996 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 997 prev = null; 998 } 999 mPausingActivity = null; 1000 } 1001 1002 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1003 if (!mService.isSleepingOrShuttingDown()) { 1004 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1005 } else { 1006 mStackSupervisor.checkReadyForSleepLocked(); 1007 ActivityRecord top = topStack.topRunningActivityLocked(null); 1008 if (top == null || (prev != null && top != prev)) { 1009 // If there are no more activities available to run, 1010 // do resume anyway to start something. Also if the top 1011 // activity on the stack is not the just paused activity, 1012 // we need to go ahead and resume it to ensure we complete 1013 // an in-flight app switch. 1014 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1015 } 1016 } 1017 1018 if (prev != null) { 1019 prev.resumeKeyDispatchingLocked(); 1020 1021 if (prev.app != null && prev.cpuTimeAtResume > 0 1022 && mService.mBatteryStatsService.isOnBattery()) { 1023 long diff; 1024 synchronized (mService.mProcessCpuThread) { 1025 diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1026 - prev.cpuTimeAtResume; 1027 } 1028 if (diff > 0) { 1029 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1030 synchronized (bsi) { 1031 BatteryStatsImpl.Uid.Proc ps = 1032 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1033 prev.info.packageName); 1034 if (ps != null) { 1035 ps.addForegroundTimeLocked(diff); 1036 } 1037 } 1038 } 1039 } 1040 prev.cpuTimeAtResume = 0; // reset it 1041 } 1042 } 1043 1044 /** 1045 * Once we know that we have asked an application to put an activity in 1046 * the resumed state (either by launching it or explicitly telling it), 1047 * this function updates the rest of our state to match that fact. 1048 */ 1049 private void completeResumeLocked(ActivityRecord next) { 1050 next.idle = false; 1051 next.results = null; 1052 next.newIntents = null; 1053 1054 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1055 ProcessRecord app = next.task.mActivities.get(0).app; 1056 if (app != null && app != mService.mHomeProcess) { 1057 mService.mHomeProcess = app; 1058 } 1059 } 1060 1061 if (next.nowVisible) { 1062 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1063 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1064 } 1065 1066 // schedule an idle timeout in case the app doesn't do it for us. 1067 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1068 1069 mStackSupervisor.reportResumedActivityLocked(next); 1070 1071 next.resumeKeyDispatchingLocked(); 1072 mNoAnimActivities.clear(); 1073 1074 // Mark the point when the activity is resuming 1075 // TODO: To be more accurate, the mark should be before the onCreate, 1076 // not after the onResume. But for subsequent starts, onResume is fine. 1077 if (next.app != null) { 1078 synchronized (mService.mProcessCpuThread) { 1079 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1080 } 1081 } else { 1082 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1083 } 1084 1085 // If we are resuming the activity that we had last screenshotted, then we know it will be 1086 // updated, so invalidate the last screenshot to ensure we take a fresh one when requested 1087 if (next == mLastScreenshotActivity) { 1088 invalidateLastScreenshot(); 1089 } 1090 next.returningOptions = null; 1091 } 1092 1093 private void setVisibile(ActivityRecord r, boolean visible) { 1094 r.visible = visible; 1095 mWindowManager.setAppVisibility(r.appToken, visible); 1096 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1097 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1098 ActivityContainer container = containers.get(containerNdx); 1099 container.setVisible(visible); 1100 } 1101 } 1102 1103 // Find the first visible activity above the passed activity and if it is translucent return it 1104 // otherwise return null; 1105 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1106 TaskRecord task = r.task; 1107 if (task == null) { 1108 return null; 1109 } 1110 1111 ActivityStack stack = task.stack; 1112 if (stack == null) { 1113 return null; 1114 } 1115 1116 int stackNdx = mStacks.indexOf(stack); 1117 1118 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1119 int taskNdx = tasks.indexOf(task); 1120 1121 ArrayList<ActivityRecord> activities = task.mActivities; 1122 int activityNdx = activities.indexOf(r) + 1; 1123 1124 final int numStacks = mStacks.size(); 1125 while (stackNdx < numStacks) { 1126 tasks = mStacks.get(stackNdx).mTaskHistory; 1127 final int numTasks = tasks.size(); 1128 while (taskNdx < numTasks) { 1129 activities = tasks.get(taskNdx).mActivities; 1130 final int numActivities = activities.size(); 1131 while (activityNdx < numActivities) { 1132 final ActivityRecord activity = activities.get(activityNdx); 1133 if (!activity.finishing) { 1134 return activity.fullscreen ? null : activity; 1135 } 1136 ++activityNdx; 1137 } 1138 activityNdx = 0; 1139 ++taskNdx; 1140 } 1141 taskNdx = 0; 1142 ++stackNdx; 1143 } 1144 1145 return null; 1146 } 1147 1148 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1149 // If so, this stack is hidden, otherwise it is visible. 1150 private boolean isStackVisible() { 1151 if (!isAttached()) { 1152 return false; 1153 } 1154 1155 if (mStackSupervisor.isFrontStack(this)) { 1156 return true; 1157 } 1158 1159 /** 1160 * Start at the task above this one and go up, looking for a visible 1161 * fullscreen activity, or a translucent activity that requested the 1162 * wallpaper to be shown behind it. 1163 */ 1164 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1165 final ArrayList<TaskRecord> tasks = mStacks.get(i).getAllTasks(); 1166 for (int taskNdx = 0; taskNdx < tasks.size(); taskNdx++) { 1167 final TaskRecord task = tasks.get(taskNdx); 1168 final ArrayList<ActivityRecord> activities = task.mActivities; 1169 for (int activityNdx = 0; activityNdx < activities.size(); activityNdx++) { 1170 final ActivityRecord r = activities.get(activityNdx); 1171 1172 // Conditions for an activity to obscure the stack we're 1173 // examining: 1174 // 1. Not Finishing AND Visible AND: 1175 // 2. Either: 1176 // - Full Screen Activity OR 1177 // - On top of Home and our stack is NOT home 1178 if (!r.finishing && r.visible && (r.fullscreen || 1179 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1180 return false; 1181 } 1182 } 1183 } 1184 } 1185 1186 return true; 1187 } 1188 1189 /** 1190 * Make sure that all activities that need to be visible (that is, they 1191 * currently can be seen by the user) actually are. 1192 */ 1193 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1194 ActivityRecord top = topRunningActivityLocked(null); 1195 if (top == null) { 1196 return; 1197 } 1198 if (DEBUG_VISBILITY) Slog.v( 1199 TAG, "ensureActivitiesVisible behind " + top 1200 + " configChanges=0x" + Integer.toHexString(configChanges)); 1201 1202 if (mTranslucentActivityWaiting != top) { 1203 mUndrawnActivitiesBelowTopTranslucent.clear(); 1204 if (mTranslucentActivityWaiting != null) { 1205 // Call the callback with a timeout indication. 1206 notifyActivityDrawnLocked(null); 1207 mTranslucentActivityWaiting = null; 1208 } 1209 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1210 } 1211 1212 // If the top activity is not fullscreen, then we need to 1213 // make sure any activities under it are now visible. 1214 boolean aboveTop = true; 1215 boolean behindFullscreen = !isStackVisible(); 1216 1217 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1218 final TaskRecord task = mTaskHistory.get(taskNdx); 1219 final ArrayList<ActivityRecord> activities = task.mActivities; 1220 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1221 final ActivityRecord r = activities.get(activityNdx); 1222 if (r.finishing) { 1223 continue; 1224 } 1225 if (aboveTop && r != top) { 1226 continue; 1227 } 1228 aboveTop = false; 1229 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1230 // but must be drawn initially for the animation as though they were visible. 1231 if (!behindFullscreen || r.mLaunchTaskBehind) { 1232 if (DEBUG_VISBILITY) Slog.v( 1233 TAG, "Make visible? " + r + " finishing=" + r.finishing 1234 + " state=" + r.state); 1235 1236 // First: if this is not the current activity being started, make 1237 // sure it matches the current configuration. 1238 if (r != starting) { 1239 ensureActivityConfigurationLocked(r, 0); 1240 } 1241 1242 if (r.app == null || r.app.thread == null) { 1243 // This activity needs to be visible, but isn't even 1244 // running... get it started, but don't resume it 1245 // at this point. 1246 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1247 if (r != starting) { 1248 r.startFreezingScreenLocked(r.app, configChanges); 1249 } 1250 if (!r.visible || r.mLaunchTaskBehind) { 1251 if (DEBUG_VISBILITY) Slog.v( 1252 TAG, "Starting and making visible: " + r); 1253 setVisibile(r, true); 1254 } 1255 if (r != starting) { 1256 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1257 } 1258 1259 } else if (r.visible) { 1260 // If this activity is already visible, then there is nothing 1261 // else to do here. 1262 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1263 r.stopFreezingScreenLocked(false); 1264 try { 1265 if (r.returningOptions != null) { 1266 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1267 r.returningOptions); 1268 } 1269 } catch(RemoteException e) { 1270 } 1271 } else { 1272 // This activity is not currently visible, but is running. 1273 // Tell it to become visible. 1274 r.visible = true; 1275 if (r.state != ActivityState.RESUMED && r != starting) { 1276 // If this activity is paused, tell it 1277 // to now show its window. 1278 if (DEBUG_VISBILITY) Slog.v( 1279 TAG, "Making visible and scheduling visibility: " + r); 1280 try { 1281 if (mTranslucentActivityWaiting != null) { 1282 r.updateOptionsLocked(r.returningOptions); 1283 mUndrawnActivitiesBelowTopTranslucent.add(r); 1284 } 1285 setVisibile(r, true); 1286 r.sleeping = false; 1287 r.app.pendingUiClean = true; 1288 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1289 r.stopFreezingScreenLocked(false); 1290 } catch (Exception e) { 1291 // Just skip on any failure; we'll make it 1292 // visible when it next restarts. 1293 Slog.w(TAG, "Exception thrown making visibile: " 1294 + r.intent.getComponent(), e); 1295 } 1296 } 1297 } 1298 1299 // Aggregate current change flags. 1300 configChanges |= r.configChangeFlags; 1301 1302 if (r.fullscreen) { 1303 // At this point, nothing else needs to be shown 1304 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1305 behindFullscreen = true; 1306 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1307 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1308 behindFullscreen = true; 1309 } 1310 } else { 1311 if (DEBUG_VISBILITY) Slog.v( 1312 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1313 + " state=" + r.state 1314 + " behindFullscreen=" + behindFullscreen); 1315 // Now for any activities that aren't visible to the user, make 1316 // sure they no longer are keeping the screen frozen. 1317 if (r.visible) { 1318 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1319 try { 1320 setVisibile(r, false); 1321 switch (r.state) { 1322 case STOPPING: 1323 case STOPPED: 1324 if (r.app != null && r.app.thread != null) { 1325 if (DEBUG_VISBILITY) Slog.v( 1326 TAG, "Scheduling invisibility: " + r); 1327 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1328 } 1329 break; 1330 1331 case INITIALIZING: 1332 case RESUMED: 1333 case PAUSING: 1334 case PAUSED: 1335 // This case created for transitioning activities from 1336 // translucent to opaque {@link Activity#convertToOpaque}. 1337 if (getVisibleBehindActivity() == r) { 1338 releaseBackgroundResources(); 1339 } else { 1340 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1341 mStackSupervisor.mStoppingActivities.add(r); 1342 } 1343 mStackSupervisor.scheduleIdleLocked(); 1344 } 1345 break; 1346 1347 default: 1348 break; 1349 } 1350 } catch (Exception e) { 1351 // Just skip on any failure; we'll make it 1352 // visible when it next restarts. 1353 Slog.w(TAG, "Exception thrown making hidden: " 1354 + r.intent.getComponent(), e); 1355 } 1356 } else { 1357 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1358 } 1359 } 1360 } 1361 } 1362 1363 if (mTranslucentActivityWaiting != null && 1364 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1365 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1366 notifyActivityDrawnLocked(null); 1367 } 1368 } 1369 1370 void convertToTranslucent(ActivityRecord r) { 1371 mTranslucentActivityWaiting = r; 1372 mUndrawnActivitiesBelowTopTranslucent.clear(); 1373 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1374 } 1375 1376 /** 1377 * Called as activities below the top translucent activity are redrawn. When the last one is 1378 * redrawn notify the top activity by calling 1379 * {@link Activity#onTranslucentConversionComplete}. 1380 * 1381 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1382 * occurred and the activity will be notified immediately. 1383 */ 1384 void notifyActivityDrawnLocked(ActivityRecord r) { 1385 mActivityContainer.setDrawn(); 1386 if ((r == null) 1387 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1388 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1389 // The last undrawn activity below the top has just been drawn. If there is an 1390 // opaque activity at the top, notify it that it can become translucent safely now. 1391 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1392 mTranslucentActivityWaiting = null; 1393 mUndrawnActivitiesBelowTopTranslucent.clear(); 1394 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1395 1396 if (waitingActivity != null) { 1397 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1398 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1399 try { 1400 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1401 waitingActivity.appToken, r != null); 1402 } catch (RemoteException e) { 1403 } 1404 } 1405 } 1406 } 1407 } 1408 1409 /** If any activities below the top running one are in the INITIALIZING state and they have a 1410 * starting window displayed then remove that starting window. It is possible that the activity 1411 * in this state will never resumed in which case that starting window will be orphaned. */ 1412 void cancelInitializingActivities() { 1413 final ActivityRecord topActivity = topRunningActivityLocked(null); 1414 boolean aboveTop = true; 1415 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1416 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1417 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1418 final ActivityRecord r = activities.get(activityNdx); 1419 if (aboveTop) { 1420 if (r == topActivity) { 1421 aboveTop = false; 1422 } 1423 continue; 1424 } 1425 1426 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1427 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1428 r.mStartingWindowShown = false; 1429 mWindowManager.removeAppStartingWindow(r.appToken); 1430 } 1431 } 1432 } 1433 } 1434 1435 /** 1436 * Ensure that the top activity in the stack is resumed. 1437 * 1438 * @param prev The previously resumed activity, for when in the process 1439 * of pausing; can be null to call from elsewhere. 1440 * 1441 * @return Returns true if something is being resumed, or false if 1442 * nothing happened. 1443 */ 1444 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1445 return resumeTopActivityLocked(prev, null); 1446 } 1447 1448 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1449 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1450 1451 ActivityRecord parent = mActivityContainer.mParentActivity; 1452 if ((parent != null && parent.state != ActivityState.RESUMED) || 1453 !mActivityContainer.isAttachedLocked()) { 1454 // Do not resume this stack if its parent is not resumed. 1455 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1456 return false; 1457 } 1458 1459 cancelInitializingActivities(); 1460 1461 // Find the first activity that is not finishing. 1462 ActivityRecord next = topRunningActivityLocked(null); 1463 1464 // Remember how we'll process this pause/resume situation, and ensure 1465 // that the state is reset however we wind up proceeding. 1466 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1467 mStackSupervisor.mUserLeaving = false; 1468 1469 final TaskRecord prevTask = prev != null ? prev.task : null; 1470 if (next == null) { 1471 // There are no more activities! Let's just start up the 1472 // Launcher... 1473 ActivityOptions.abort(options); 1474 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1475 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1476 // Only resume home if on home display 1477 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1478 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1479 return isOnHomeDisplay() && 1480 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1481 } 1482 1483 next.delayedResume = false; 1484 1485 // If the top activity is the resumed one, nothing to do. 1486 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1487 mStackSupervisor.allResumedActivitiesComplete()) { 1488 // Make sure we have executed any pending transitions, since there 1489 // should be nothing left to do at this point. 1490 mWindowManager.executeAppTransition(); 1491 mNoAnimActivities.clear(); 1492 ActivityOptions.abort(options); 1493 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1494 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1495 return false; 1496 } 1497 1498 final TaskRecord nextTask = next.task; 1499 if (prevTask != null && prevTask.stack == this && 1500 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1501 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1502 if (prevTask == nextTask) { 1503 prevTask.setFrontOfTask(); 1504 } else if (prevTask != topTask()) { 1505 // This task is going away but it was supposed to return to the home stack. 1506 // Now the task above it has to return to the home task instead. 1507 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1508 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1509 } else { 1510 if (DEBUG_STATES && isOnHomeDisplay()) Slog.d(TAG, 1511 "resumeTopActivityLocked: Launching home next"); 1512 // Only resume home if on home display 1513 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1514 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1515 return isOnHomeDisplay() && 1516 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev); 1517 } 1518 } 1519 1520 // If we are sleeping, and there is no resumed activity, and the top 1521 // activity is paused, well that is the state we want. 1522 if (mService.isSleepingOrShuttingDown() 1523 && mLastPausedActivity == next 1524 && mStackSupervisor.allPausedActivitiesComplete()) { 1525 // Make sure we have executed any pending transitions, since there 1526 // should be nothing left to do at this point. 1527 mWindowManager.executeAppTransition(); 1528 mNoAnimActivities.clear(); 1529 ActivityOptions.abort(options); 1530 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1531 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1532 return false; 1533 } 1534 1535 // Make sure that the user who owns this activity is started. If not, 1536 // we will just leave it as is because someone should be bringing 1537 // another user's activities to the top of the stack. 1538 if (mService.mStartedUsers.get(next.userId) == null) { 1539 Slog.w(TAG, "Skipping resume of top activity " + next 1540 + ": user " + next.userId + " is stopped"); 1541 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1542 return false; 1543 } 1544 1545 // The activity may be waiting for stop, but that is no longer 1546 // appropriate for it. 1547 mStackSupervisor.mStoppingActivities.remove(next); 1548 mStackSupervisor.mGoingToSleepActivities.remove(next); 1549 next.sleeping = false; 1550 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1551 1552 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1553 1554 // If we are currently pausing an activity, then don't do anything 1555 // until that is done. 1556 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1557 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1558 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1559 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1560 return false; 1561 } 1562 1563 // Okay we are now going to start a switch, to 'next'. We may first 1564 // have to pause the current activity, but this is an important point 1565 // where we have decided to go to 'next' so keep track of that. 1566 // XXX "App Redirected" dialog is getting too many false positives 1567 // at this point, so turn off for now. 1568 if (false) { 1569 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1570 long now = SystemClock.uptimeMillis(); 1571 final boolean inTime = mLastStartedActivity.startTime != 0 1572 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1573 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1574 final int nextUid = next.info.applicationInfo.uid; 1575 if (inTime && lastUid != nextUid 1576 && lastUid != next.launchedFromUid 1577 && mService.checkPermission( 1578 android.Manifest.permission.STOP_APP_SWITCHES, 1579 -1, next.launchedFromUid) 1580 != PackageManager.PERMISSION_GRANTED) { 1581 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1582 } else { 1583 next.startTime = now; 1584 mLastStartedActivity = next; 1585 } 1586 } else { 1587 next.startTime = SystemClock.uptimeMillis(); 1588 mLastStartedActivity = next; 1589 } 1590 } 1591 1592 // We need to start pausing the current activity so the top one 1593 // can be resumed... 1594 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving); 1595 if (mResumedActivity != null) { 1596 pausing = true; 1597 startPausingLocked(userLeaving, false); 1598 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1599 } 1600 if (pausing) { 1601 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1602 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1603 // At this point we want to put the upcoming activity's process 1604 // at the top of the LRU list, since we know we will be needing it 1605 // very soon and it would be a waste to let it get killed if it 1606 // happens to be sitting towards the end. 1607 if (next.app != null && next.app.thread != null) { 1608 mService.updateLruProcessLocked(next.app, true, null); 1609 } 1610 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1611 return true; 1612 } 1613 1614 // If the most recent activity was noHistory but was only stopped rather 1615 // than stopped+finished because the device went to sleep, we need to make 1616 // sure to finish it as we're making a new activity topmost. 1617 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1618 !mLastNoHistoryActivity.finishing) { 1619 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1620 " on new resume"); 1621 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1622 null, "no-history", false); 1623 mLastNoHistoryActivity = null; 1624 } 1625 1626 if (prev != null && prev != next) { 1627 if (!prev.waitingVisible && next != null && !next.nowVisible) { 1628 prev.waitingVisible = true; 1629 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1630 if (DEBUG_SWITCH) Slog.v( 1631 TAG, "Resuming top, waiting visible to hide: " + prev); 1632 } else { 1633 // The next activity is already visible, so hide the previous 1634 // activity's windows right now so we can show the new one ASAP. 1635 // We only do this if the previous is finishing, which should mean 1636 // it is on top of the one being resumed so hiding it quickly 1637 // is good. Otherwise, we want to do the normal route of allowing 1638 // the resumed activity to be shown so we can decide if the 1639 // previous should actually be hidden depending on whether the 1640 // new one is found to be full-screen or not. 1641 if (prev.finishing) { 1642 mWindowManager.setAppVisibility(prev.appToken, false); 1643 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1644 + prev + ", waitingVisible=" 1645 + (prev != null ? prev.waitingVisible : null) 1646 + ", nowVisible=" + next.nowVisible); 1647 } else { 1648 if (DEBUG_SWITCH) Slog.v(TAG, "Previous already visible but still waiting to hide: " 1649 + prev + ", waitingVisible=" 1650 + (prev != null ? prev.waitingVisible : null) 1651 + ", nowVisible=" + next.nowVisible); 1652 } 1653 } 1654 } 1655 1656 // Launching this app's activity, make sure the app is no longer 1657 // considered stopped. 1658 try { 1659 AppGlobals.getPackageManager().setPackageStoppedState( 1660 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1661 } catch (RemoteException e1) { 1662 } catch (IllegalArgumentException e) { 1663 Slog.w(TAG, "Failed trying to unstop package " 1664 + next.packageName + ": " + e); 1665 } 1666 1667 // We are starting up the next activity, so tell the window manager 1668 // that the previous one will be hidden soon. This way it can know 1669 // to ignore it when computing the desired screen orientation. 1670 boolean anim = true; 1671 if (prev != null) { 1672 if (prev.finishing) { 1673 if (DEBUG_TRANSITION) Slog.v(TAG, 1674 "Prepare close transition: prev=" + prev); 1675 if (mNoAnimActivities.contains(prev)) { 1676 anim = false; 1677 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1678 } else { 1679 mWindowManager.prepareAppTransition(prev.task == next.task 1680 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1681 : AppTransition.TRANSIT_TASK_CLOSE, false); 1682 } 1683 mWindowManager.setAppWillBeHidden(prev.appToken); 1684 mWindowManager.setAppVisibility(prev.appToken, false); 1685 } else { 1686 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1687 if (mNoAnimActivities.contains(next)) { 1688 anim = false; 1689 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1690 } else { 1691 mWindowManager.prepareAppTransition(prev.task == next.task 1692 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1693 : next.mLaunchTaskBehind 1694 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1695 : AppTransition.TRANSIT_TASK_OPEN, false); 1696 } 1697 } 1698 if (false) { 1699 mWindowManager.setAppWillBeHidden(prev.appToken); 1700 mWindowManager.setAppVisibility(prev.appToken, false); 1701 } 1702 } else { 1703 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1704 if (mNoAnimActivities.contains(next)) { 1705 anim = false; 1706 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1707 } else { 1708 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1709 } 1710 } 1711 1712 Bundle resumeAnimOptions = null; 1713 if (anim) { 1714 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1715 if (opts != null) { 1716 resumeAnimOptions = opts.toBundle(); 1717 } 1718 next.applyOptionsLocked(); 1719 } else { 1720 next.clearOptionsLocked(); 1721 } 1722 1723 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1724 if (next.app != null && next.app.thread != null) { 1725 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1726 1727 // This activity is now becoming visible. 1728 mWindowManager.setAppVisibility(next.appToken, true); 1729 1730 // schedule launch ticks to collect information about slow apps. 1731 next.startLaunchTickingLocked(); 1732 1733 ActivityRecord lastResumedActivity = 1734 lastStack == null ? null :lastStack.mResumedActivity; 1735 ActivityState lastState = next.state; 1736 1737 mService.updateCpuStats(); 1738 1739 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1740 next.state = ActivityState.RESUMED; 1741 mResumedActivity = next; 1742 next.task.touchActiveTime(); 1743 mService.addRecentTaskLocked(next.task); 1744 mService.updateLruProcessLocked(next.app, true, null); 1745 updateLRUListLocked(next); 1746 mService.updateOomAdjLocked(); 1747 1748 // Have the window manager re-evaluate the orientation of 1749 // the screen based on the new activity order. 1750 boolean notUpdated = true; 1751 if (mStackSupervisor.isFrontStack(this)) { 1752 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1753 mService.mConfiguration, 1754 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1755 if (config != null) { 1756 next.frozenBeforeDestroy = true; 1757 } 1758 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1759 } 1760 1761 if (notUpdated) { 1762 // The configuration update wasn't able to keep the existing 1763 // instance of the activity, and instead started a new one. 1764 // We should be all done, but let's just make sure our activity 1765 // is still at the top and schedule another run if something 1766 // weird happened. 1767 ActivityRecord nextNext = topRunningActivityLocked(null); 1768 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1769 "Activity config changed during resume: " + next 1770 + ", new next: " + nextNext); 1771 if (nextNext != next) { 1772 // Do over! 1773 mStackSupervisor.scheduleResumeTopActivities(); 1774 } 1775 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1776 mNoAnimActivities.clear(); 1777 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1778 return true; 1779 } 1780 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1781 return false; 1782 } 1783 1784 try { 1785 // Deliver all pending results. 1786 ArrayList<ResultInfo> a = next.results; 1787 if (a != null) { 1788 final int N = a.size(); 1789 if (!next.finishing && N > 0) { 1790 if (DEBUG_RESULTS) Slog.v( 1791 TAG, "Delivering results to " + next 1792 + ": " + a); 1793 next.app.thread.scheduleSendResult(next.appToken, a); 1794 } 1795 } 1796 1797 if (next.newIntents != null) { 1798 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1799 } 1800 1801 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, 1802 next.userId, System.identityHashCode(next), 1803 next.task.taskId, next.shortComponentName); 1804 1805 next.sleeping = false; 1806 mService.showAskCompatModeDialogLocked(next); 1807 next.app.pendingUiClean = true; 1808 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1809 next.clearOptionsLocked(); 1810 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1811 mService.isNextTransitionForward(), resumeAnimOptions); 1812 1813 mStackSupervisor.checkReadyForSleepLocked(); 1814 1815 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1816 } catch (Exception e) { 1817 // Whoops, need to restart this activity! 1818 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1819 + lastState + ": " + next); 1820 next.state = lastState; 1821 if (lastStack != null) { 1822 lastStack.mResumedActivity = lastResumedActivity; 1823 } 1824 Slog.i(TAG, "Restarting because process died: " + next); 1825 if (!next.hasBeenLaunched) { 1826 next.hasBeenLaunched = true; 1827 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1828 mStackSupervisor.isFrontStack(lastStack)) { 1829 mWindowManager.setAppStartingWindow( 1830 next.appToken, next.packageName, next.theme, 1831 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1832 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1833 next.windowFlags, null, true); 1834 } 1835 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1836 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1837 return true; 1838 } 1839 1840 // From this point on, if something goes wrong there is no way 1841 // to recover the activity. 1842 try { 1843 next.visible = true; 1844 completeResumeLocked(next); 1845 } catch (Exception e) { 1846 // If any exception gets thrown, toss away this 1847 // activity and try the next one. 1848 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1849 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1850 "resume-exception", true); 1851 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1852 return true; 1853 } 1854 next.stopped = false; 1855 1856 } else { 1857 // Whoops, need to restart this activity! 1858 if (!next.hasBeenLaunched) { 1859 next.hasBeenLaunched = true; 1860 } else { 1861 if (SHOW_APP_STARTING_PREVIEW) { 1862 mWindowManager.setAppStartingWindow( 1863 next.appToken, next.packageName, next.theme, 1864 mService.compatibilityInfoForPackageLocked( 1865 next.info.applicationInfo), 1866 next.nonLocalizedLabel, 1867 next.labelRes, next.icon, next.logo, next.windowFlags, 1868 null, true); 1869 } 1870 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1871 } 1872 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1873 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1874 } 1875 1876 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1877 return true; 1878 } 1879 1880 private void insertTaskAtTop(TaskRecord task) { 1881 // If this is being moved to the top by another activity or being launched from the home 1882 // activity, set mOnTopOfHome accordingly. 1883 if (isOnHomeDisplay()) { 1884 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1885 final boolean fromHome = lastStack.isHomeStack(); 1886 if (!isHomeStack() && (fromHome || topTask() != task)) { 1887 task.setTaskToReturnTo(fromHome 1888 ? lastStack.topTask() == null 1889 ? HOME_ACTIVITY_TYPE 1890 : lastStack.topTask().taskType 1891 : APPLICATION_ACTIVITY_TYPE); 1892 } 1893 } else { 1894 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 1895 } 1896 1897 mTaskHistory.remove(task); 1898 // Now put task at top. 1899 int taskNdx = mTaskHistory.size(); 1900 if (!isCurrentProfileLocked(task.userId)) { 1901 // Put non-current user tasks below current user tasks. 1902 while (--taskNdx >= 0) { 1903 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 1904 break; 1905 } 1906 } 1907 ++taskNdx; 1908 } 1909 mTaskHistory.add(taskNdx, task); 1910 updateTaskMovement(task, true); 1911 } 1912 1913 final void startActivityLocked(ActivityRecord r, boolean newTask, 1914 boolean doResume, boolean keepCurTransition, Bundle options) { 1915 TaskRecord rTask = r.task; 1916 final int taskId = rTask.taskId; 1917 // mLaunchTaskBehind tasks get placed at the back of the task stack. 1918 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 1919 // Last activity in task had been removed or ActivityManagerService is reusing task. 1920 // Insert or replace. 1921 // Might not even be in. 1922 insertTaskAtTop(rTask); 1923 mWindowManager.moveTaskToTop(taskId); 1924 } 1925 TaskRecord task = null; 1926 if (!newTask) { 1927 // If starting in an existing task, find where that is... 1928 boolean startIt = true; 1929 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1930 task = mTaskHistory.get(taskNdx); 1931 if (task.getTopActivity() == null) { 1932 // All activities in task are finishing. 1933 continue; 1934 } 1935 if (task == r.task) { 1936 // Here it is! Now, if this is not yet visible to the 1937 // user, then just add it without starting; it will 1938 // get started when the user navigates back to it. 1939 if (!startIt) { 1940 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 1941 + task, new RuntimeException("here").fillInStackTrace()); 1942 task.addActivityToTop(r); 1943 r.putInHistory(); 1944 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 1945 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 1946 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 1947 r.userId, r.info.configChanges, task.voiceSession != null, 1948 r.mLaunchTaskBehind); 1949 if (VALIDATE_TOKENS) { 1950 validateAppTokensLocked(); 1951 } 1952 ActivityOptions.abort(options); 1953 return; 1954 } 1955 break; 1956 } else if (task.numFullscreen > 0) { 1957 startIt = false; 1958 } 1959 } 1960 } 1961 1962 // Place a new activity at top of stack, so it is next to interact 1963 // with the user. 1964 1965 // If we are not placing the new activity frontmost, we do not want 1966 // to deliver the onUserLeaving callback to the actual frontmost 1967 // activity 1968 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 1969 mStackSupervisor.mUserLeaving = false; 1970 if (DEBUG_USER_LEAVING) Slog.v(TAG, 1971 "startActivity() behind front, mUserLeaving=false"); 1972 } 1973 1974 task = r.task; 1975 1976 // Slot the activity into the history stack and proceed 1977 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 1978 new RuntimeException("here").fillInStackTrace()); 1979 task.addActivityToTop(r); 1980 task.setFrontOfTask(); 1981 1982 r.putInHistory(); 1983 if (!isHomeStack() || numActivities() > 0) { 1984 // We want to show the starting preview window if we are 1985 // switching to a new task, or the next activity's process is 1986 // not currently running. 1987 boolean showStartingIcon = newTask; 1988 ProcessRecord proc = r.app; 1989 if (proc == null) { 1990 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 1991 } 1992 if (proc == null || proc.thread == null) { 1993 showStartingIcon = true; 1994 } 1995 if (DEBUG_TRANSITION) Slog.v(TAG, 1996 "Prepare open transition: starting " + r); 1997 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 1998 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 1999 mNoAnimActivities.add(r); 2000 } else { 2001 mWindowManager.prepareAppTransition(newTask 2002 ? r.mLaunchTaskBehind 2003 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2004 : AppTransition.TRANSIT_TASK_OPEN 2005 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2006 mNoAnimActivities.remove(r); 2007 } 2008 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2009 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2010 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2011 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2012 boolean doShow = true; 2013 if (newTask) { 2014 // Even though this activity is starting fresh, we still need 2015 // to reset it to make sure we apply affinities to move any 2016 // existing activities from other tasks in to it. 2017 // If the caller has requested that the target task be 2018 // reset, then do so. 2019 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2020 resetTaskIfNeededLocked(r, r); 2021 doShow = topRunningNonDelayedActivityLocked(null) == r; 2022 } 2023 } else if (options != null && new ActivityOptions(options).getAnimationType() 2024 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2025 doShow = false; 2026 } 2027 if (r.mLaunchTaskBehind) { 2028 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2029 // tell WindowManager that r is visible even though it is at the back of the stack. 2030 mWindowManager.setAppVisibility(r.appToken, true); 2031 ensureActivitiesVisibleLocked(null, 0); 2032 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2033 // Figure out if we are transitioning from another activity that is 2034 // "has the same starting icon" as the next one. This allows the 2035 // window manager to keep the previous window it had previously 2036 // created, if it still had one. 2037 ActivityRecord prev = mResumedActivity; 2038 if (prev != null) { 2039 // We don't want to reuse the previous starting preview if: 2040 // (1) The current activity is in a different task. 2041 if (prev.task != r.task) { 2042 prev = null; 2043 } 2044 // (2) The current activity is already displayed. 2045 else if (prev.nowVisible) { 2046 prev = null; 2047 } 2048 } 2049 mWindowManager.setAppStartingWindow( 2050 r.appToken, r.packageName, r.theme, 2051 mService.compatibilityInfoForPackageLocked( 2052 r.info.applicationInfo), r.nonLocalizedLabel, 2053 r.labelRes, r.icon, r.logo, r.windowFlags, 2054 prev != null ? prev.appToken : null, showStartingIcon); 2055 r.mStartingWindowShown = true; 2056 } 2057 } else { 2058 // If this is the first activity, don't do any fancy animations, 2059 // because there is nothing for it to animate on top of. 2060 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2061 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2062 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2063 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2064 ActivityOptions.abort(options); 2065 options = null; 2066 } 2067 if (VALIDATE_TOKENS) { 2068 validateAppTokensLocked(); 2069 } 2070 2071 if (doResume) { 2072 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2073 } 2074 } 2075 2076 final void validateAppTokensLocked() { 2077 mValidateAppTokens.clear(); 2078 mValidateAppTokens.ensureCapacity(numActivities()); 2079 final int numTasks = mTaskHistory.size(); 2080 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2081 TaskRecord task = mTaskHistory.get(taskNdx); 2082 final ArrayList<ActivityRecord> activities = task.mActivities; 2083 if (activities.isEmpty()) { 2084 continue; 2085 } 2086 TaskGroup group = new TaskGroup(); 2087 group.taskId = task.taskId; 2088 mValidateAppTokens.add(group); 2089 final int numActivities = activities.size(); 2090 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2091 final ActivityRecord r = activities.get(activityNdx); 2092 group.tokens.add(r.appToken); 2093 } 2094 } 2095 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2096 } 2097 2098 /** 2099 * Perform a reset of the given task, if needed as part of launching it. 2100 * Returns the new HistoryRecord at the top of the task. 2101 */ 2102 /** 2103 * Helper method for #resetTaskIfNeededLocked. 2104 * We are inside of the task being reset... we'll either finish this activity, push it out 2105 * for another task, or leave it as-is. 2106 * @param task The task containing the Activity (taskTop) that might be reset. 2107 * @param forceReset 2108 * @return An ActivityOptions that needs to be processed. 2109 */ 2110 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2111 ActivityOptions topOptions = null; 2112 2113 int replyChainEnd = -1; 2114 boolean canMoveOptions = true; 2115 2116 // We only do this for activities that are not the root of the task (since if we finish 2117 // the root, we may no longer have the task!). 2118 final ArrayList<ActivityRecord> activities = task.mActivities; 2119 final int numActivities = activities.size(); 2120 final int rootActivityNdx = task.findEffectiveRootIndex(); 2121 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2122 ActivityRecord target = activities.get(i); 2123 if (target.frontOfTask) 2124 break; 2125 2126 final int flags = target.info.flags; 2127 final boolean finishOnTaskLaunch = 2128 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2129 final boolean allowTaskReparenting = 2130 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2131 final boolean clearWhenTaskReset = 2132 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2133 2134 if (!finishOnTaskLaunch 2135 && !clearWhenTaskReset 2136 && target.resultTo != null) { 2137 // If this activity is sending a reply to a previous 2138 // activity, we can't do anything with it now until 2139 // we reach the start of the reply chain. 2140 // XXX note that we are assuming the result is always 2141 // to the previous activity, which is almost always 2142 // the case but we really shouldn't count on. 2143 if (replyChainEnd < 0) { 2144 replyChainEnd = i; 2145 } 2146 } else if (!finishOnTaskLaunch 2147 && !clearWhenTaskReset 2148 && allowTaskReparenting 2149 && target.taskAffinity != null 2150 && !target.taskAffinity.equals(task.affinity)) { 2151 // If this activity has an affinity for another 2152 // task, then we need to move it out of here. We will 2153 // move it as far out of the way as possible, to the 2154 // bottom of the activity stack. This also keeps it 2155 // correctly ordered with any activities we previously 2156 // moved. 2157 final TaskRecord targetTask; 2158 final ActivityRecord bottom = 2159 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2160 mTaskHistory.get(0).mActivities.get(0) : null; 2161 if (bottom != null && target.taskAffinity != null 2162 && target.taskAffinity.equals(bottom.task.affinity)) { 2163 // If the activity currently at the bottom has the 2164 // same task affinity as the one we are moving, 2165 // then merge it into the same task. 2166 targetTask = bottom.task; 2167 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2168 + " out to bottom task " + bottom.task); 2169 } else { 2170 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2171 null, null, null, false); 2172 targetTask.affinityIntent = target.intent; 2173 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2174 + " out to new task " + target.task); 2175 } 2176 2177 final int targetTaskId = targetTask.taskId; 2178 mWindowManager.setAppGroupId(target.appToken, targetTaskId); 2179 2180 boolean noOptions = canMoveOptions; 2181 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2182 for (int srcPos = start; srcPos >= i; --srcPos) { 2183 final ActivityRecord p = activities.get(srcPos); 2184 if (p.finishing) { 2185 continue; 2186 } 2187 2188 canMoveOptions = false; 2189 if (noOptions && topOptions == null) { 2190 topOptions = p.takeOptionsLocked(); 2191 if (topOptions != null) { 2192 noOptions = false; 2193 } 2194 } 2195 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2196 + task + " adding to task=" + targetTask 2197 + " Callers=" + Debug.getCallers(4)); 2198 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2199 + " out to target's task " + target.task); 2200 p.setTask(targetTask, null); 2201 targetTask.addActivityAtBottom(p); 2202 2203 mWindowManager.setAppGroupId(p.appToken, targetTaskId); 2204 } 2205 2206 mWindowManager.moveTaskToBottom(targetTaskId); 2207 if (VALIDATE_TOKENS) { 2208 validateAppTokensLocked(); 2209 } 2210 2211 replyChainEnd = -1; 2212 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2213 // If the activity should just be removed -- either 2214 // because it asks for it, or the task should be 2215 // cleared -- then finish it and anything that is 2216 // part of its reply chain. 2217 int end; 2218 if (clearWhenTaskReset) { 2219 // In this case, we want to finish this activity 2220 // and everything above it, so be sneaky and pretend 2221 // like these are all in the reply chain. 2222 end = numActivities - 1; 2223 } else if (replyChainEnd < 0) { 2224 end = i; 2225 } else { 2226 end = replyChainEnd; 2227 } 2228 boolean noOptions = canMoveOptions; 2229 for (int srcPos = i; srcPos <= end; srcPos++) { 2230 ActivityRecord p = activities.get(srcPos); 2231 if (p.finishing) { 2232 continue; 2233 } 2234 canMoveOptions = false; 2235 if (noOptions && topOptions == null) { 2236 topOptions = p.takeOptionsLocked(); 2237 if (topOptions != null) { 2238 noOptions = false; 2239 } 2240 } 2241 if (DEBUG_TASKS) Slog.w(TAG, 2242 "resetTaskIntendedTask: calling finishActivity on " + p); 2243 if (finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false)) { 2244 end--; 2245 srcPos--; 2246 } 2247 } 2248 replyChainEnd = -1; 2249 } else { 2250 // If we were in the middle of a chain, well the 2251 // activity that started it all doesn't want anything 2252 // special, so leave it all as-is. 2253 replyChainEnd = -1; 2254 } 2255 } 2256 2257 return topOptions; 2258 } 2259 2260 /** 2261 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2262 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2263 * @param affinityTask The task we are looking for an affinity to. 2264 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2265 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2266 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2267 */ 2268 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2269 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2270 int replyChainEnd = -1; 2271 final int taskId = task.taskId; 2272 final String taskAffinity = task.affinity; 2273 2274 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2275 final int numActivities = activities.size(); 2276 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2277 2278 // Do not operate on or below the effective root Activity. 2279 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2280 ActivityRecord target = activities.get(i); 2281 if (target.frontOfTask) 2282 break; 2283 2284 final int flags = target.info.flags; 2285 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2286 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2287 2288 if (target.resultTo != null) { 2289 // If this activity is sending a reply to a previous 2290 // activity, we can't do anything with it now until 2291 // we reach the start of the reply chain. 2292 // XXX note that we are assuming the result is always 2293 // to the previous activity, which is almost always 2294 // the case but we really shouldn't count on. 2295 if (replyChainEnd < 0) { 2296 replyChainEnd = i; 2297 } 2298 } else if (topTaskIsHigher 2299 && allowTaskReparenting 2300 && taskAffinity != null 2301 && taskAffinity.equals(target.taskAffinity)) { 2302 // This activity has an affinity for our task. Either remove it if we are 2303 // clearing or move it over to our task. Note that 2304 // we currently punt on the case where we are resetting a 2305 // task that is not at the top but who has activities above 2306 // with an affinity to it... this is really not a normal 2307 // case, and we will need to later pull that task to the front 2308 // and usually at that point we will do the reset and pick 2309 // up those remaining activities. (This only happens if 2310 // someone starts an activity in a new task from an activity 2311 // in a task that is not currently on top.) 2312 if (forceReset || finishOnTaskLaunch) { 2313 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2314 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2315 for (int srcPos = start; srcPos >= i; --srcPos) { 2316 final ActivityRecord p = activities.get(srcPos); 2317 if (p.finishing) { 2318 continue; 2319 } 2320 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "reset", false); 2321 } 2322 } else { 2323 if (taskInsertionPoint < 0) { 2324 taskInsertionPoint = task.mActivities.size(); 2325 2326 } 2327 2328 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2329 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2330 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2331 for (int srcPos = start; srcPos >= i; --srcPos) { 2332 final ActivityRecord p = activities.get(srcPos); 2333 p.setTask(task, null); 2334 task.addActivityAtIndex(taskInsertionPoint, p); 2335 2336 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2337 + " to stack at " + task, 2338 new RuntimeException("here").fillInStackTrace()); 2339 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2340 + " in to resetting task " + task); 2341 mWindowManager.setAppGroupId(p.appToken, taskId); 2342 } 2343 mWindowManager.moveTaskToTop(taskId); 2344 if (VALIDATE_TOKENS) { 2345 validateAppTokensLocked(); 2346 } 2347 2348 // Now we've moved it in to place... but what if this is 2349 // a singleTop activity and we have put it on top of another 2350 // instance of the same activity? Then we drop the instance 2351 // below so it remains singleTop. 2352 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2353 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2354 int targetNdx = taskActivities.indexOf(target); 2355 if (targetNdx > 0) { 2356 ActivityRecord p = taskActivities.get(targetNdx - 1); 2357 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2358 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2359 false); 2360 } 2361 } 2362 } 2363 } 2364 2365 replyChainEnd = -1; 2366 } 2367 } 2368 return taskInsertionPoint; 2369 } 2370 2371 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2372 ActivityRecord newActivity) { 2373 boolean forceReset = 2374 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2375 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2376 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2377 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2378 forceReset = true; 2379 } 2380 } 2381 2382 final TaskRecord task = taskTop.task; 2383 2384 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2385 * for remaining tasks. Used for later tasks to reparent to task. */ 2386 boolean taskFound = false; 2387 2388 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2389 ActivityOptions topOptions = null; 2390 2391 // Preserve the location for reparenting in the new task. 2392 int reparentInsertionPoint = -1; 2393 2394 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2395 final TaskRecord targetTask = mTaskHistory.get(i); 2396 2397 if (targetTask == task) { 2398 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2399 taskFound = true; 2400 } else { 2401 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2402 taskFound, forceReset, reparentInsertionPoint); 2403 } 2404 } 2405 2406 int taskNdx = mTaskHistory.indexOf(task); 2407 do { 2408 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2409 } while (taskTop == null && taskNdx >= 0); 2410 2411 if (topOptions != null) { 2412 // If we got some ActivityOptions from an activity on top that 2413 // was removed from the task, propagate them to the new real top. 2414 if (taskTop != null) { 2415 taskTop.updateOptionsLocked(topOptions); 2416 } else { 2417 topOptions.abort(); 2418 } 2419 } 2420 2421 return taskTop; 2422 } 2423 2424 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2425 String resultWho, int requestCode, int resultCode, Intent data) { 2426 2427 if (callingUid > 0) { 2428 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2429 data, r.getUriPermissionsLocked(), r.userId); 2430 } 2431 2432 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2433 + " : who=" + resultWho + " req=" + requestCode 2434 + " res=" + resultCode + " data=" + data); 2435 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2436 try { 2437 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2438 list.add(new ResultInfo(resultWho, requestCode, 2439 resultCode, data)); 2440 r.app.thread.scheduleSendResult(r.appToken, list); 2441 return; 2442 } catch (Exception e) { 2443 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2444 } 2445 } 2446 2447 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2448 } 2449 2450 private void adjustFocusedActivityLocked(ActivityRecord r) { 2451 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2452 ActivityRecord next = topRunningActivityLocked(null); 2453 if (next != r) { 2454 final TaskRecord task = r.task; 2455 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2456 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 2457 } 2458 } 2459 ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2460 if (top != null) { 2461 mService.setFocusedActivityLocked(top); 2462 } 2463 } 2464 } 2465 2466 final void stopActivityLocked(ActivityRecord r) { 2467 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2468 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2469 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2470 if (!r.finishing) { 2471 if (!mService.isSleeping()) { 2472 if (DEBUG_STATES) { 2473 Slog.d(TAG, "no-history finish of " + r); 2474 } 2475 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2476 "no-history", false); 2477 } else { 2478 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2479 + " on stop because we're just sleeping"); 2480 } 2481 } 2482 } 2483 2484 if (r.app != null && r.app.thread != null) { 2485 adjustFocusedActivityLocked(r); 2486 r.resumeKeyDispatchingLocked(); 2487 try { 2488 r.stopped = false; 2489 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2490 + " (stop requested)"); 2491 r.state = ActivityState.STOPPING; 2492 if (DEBUG_VISBILITY) Slog.v( 2493 TAG, "Stopping visible=" + r.visible + " for " + r); 2494 if (!r.visible) { 2495 mWindowManager.setAppVisibility(r.appToken, false); 2496 } 2497 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2498 if (mService.isSleepingOrShuttingDown()) { 2499 r.setSleeping(true); 2500 } 2501 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2502 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2503 } catch (Exception e) { 2504 // Maybe just ignore exceptions here... if the process 2505 // has crashed, our death notification will clean things 2506 // up. 2507 Slog.w(TAG, "Exception thrown during pause", e); 2508 // Just in case, assume it to be stopped. 2509 r.stopped = true; 2510 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2511 r.state = ActivityState.STOPPED; 2512 if (r.configDestroy) { 2513 destroyActivityLocked(r, true, "stop-except"); 2514 } 2515 } 2516 } 2517 } 2518 2519 /** 2520 * @return Returns true if the activity is being finished, false if for 2521 * some reason it is being left as-is. 2522 */ 2523 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2524 Intent resultData, String reason, boolean oomAdj) { 2525 ActivityRecord r = isInStackLocked(token); 2526 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2527 TAG, "Finishing activity token=" + token + " r=" 2528 + ", result=" + resultCode + ", data=" + resultData 2529 + ", reason=" + reason); 2530 if (r == null) { 2531 return false; 2532 } 2533 2534 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2535 return true; 2536 } 2537 2538 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2539 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2540 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2541 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2542 ActivityRecord r = activities.get(activityNdx); 2543 if (r.resultTo == self && r.requestCode == requestCode) { 2544 if ((r.resultWho == null && resultWho == null) || 2545 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2546 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2547 false); 2548 } 2549 } 2550 } 2551 } 2552 mService.updateOomAdjLocked(); 2553 } 2554 2555 final void finishTopRunningActivityLocked(ProcessRecord app) { 2556 ActivityRecord r = topRunningActivityLocked(null); 2557 if (r != null && r.app == app) { 2558 // If the top running activity is from this crashing 2559 // process, then terminate it to avoid getting in a loop. 2560 Slog.w(TAG, " Force finishing activity " 2561 + r.intent.getComponent().flattenToShortString()); 2562 int taskNdx = mTaskHistory.indexOf(r.task); 2563 int activityNdx = r.task.mActivities.indexOf(r); 2564 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2565 // Also terminate any activities below it that aren't yet 2566 // stopped, to avoid a situation where one will get 2567 // re-start our crashing activity once it gets resumed again. 2568 --activityNdx; 2569 if (activityNdx < 0) { 2570 do { 2571 --taskNdx; 2572 if (taskNdx < 0) { 2573 break; 2574 } 2575 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2576 } while (activityNdx < 0); 2577 } 2578 if (activityNdx >= 0) { 2579 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2580 if (r.state == ActivityState.RESUMED 2581 || r.state == ActivityState.PAUSING 2582 || r.state == ActivityState.PAUSED) { 2583 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2584 Slog.w(TAG, " Force finishing activity " 2585 + r.intent.getComponent().flattenToShortString()); 2586 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "crashed", false); 2587 } 2588 } 2589 } 2590 } 2591 } 2592 2593 final void finishVoiceTask(IVoiceInteractionSession session) { 2594 IBinder sessionBinder = session.asBinder(); 2595 boolean didOne = false; 2596 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2597 TaskRecord tr = mTaskHistory.get(taskNdx); 2598 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2599 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2600 ActivityRecord r = tr.mActivities.get(activityNdx); 2601 if (!r.finishing) { 2602 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2603 false); 2604 didOne = true; 2605 } 2606 } 2607 } 2608 } 2609 if (didOne) { 2610 mService.updateOomAdjLocked(); 2611 } 2612 } 2613 2614 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2615 ArrayList<ActivityRecord> activities = r.task.mActivities; 2616 for (int index = activities.indexOf(r); index >= 0; --index) { 2617 ActivityRecord cur = activities.get(index); 2618 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2619 break; 2620 } 2621 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2622 } 2623 return true; 2624 } 2625 2626 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2627 // send the result 2628 ActivityRecord resultTo = r.resultTo; 2629 if (resultTo != null) { 2630 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2631 + " who=" + r.resultWho + " req=" + r.requestCode 2632 + " res=" + resultCode + " data=" + resultData); 2633 if (resultTo.userId != r.userId) { 2634 if (resultData != null) { 2635 resultData.setContentUserHint(r.userId); 2636 } 2637 } 2638 if (r.info.applicationInfo.uid > 0) { 2639 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2640 resultTo.packageName, resultData, 2641 resultTo.getUriPermissionsLocked(), resultTo.userId); 2642 } 2643 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2644 resultData); 2645 r.resultTo = null; 2646 } 2647 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2648 2649 // Make sure this HistoryRecord is not holding on to other resources, 2650 // because clients have remote IPC references to this object so we 2651 // can't assume that will go away and want to avoid circular IPC refs. 2652 r.results = null; 2653 r.pendingResults = null; 2654 r.newIntents = null; 2655 r.icicle = null; 2656 } 2657 2658 /** 2659 * @return Returns true if this activity has been removed from the history 2660 * list, or false if it is still in the list and will be removed later. 2661 */ 2662 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2663 String reason, boolean oomAdj) { 2664 if (r.finishing) { 2665 Slog.w(TAG, "Duplicate finish request for " + r); 2666 return false; 2667 } 2668 2669 r.makeFinishing(); 2670 final TaskRecord task = r.task; 2671 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2672 r.userId, System.identityHashCode(r), 2673 task.taskId, r.shortComponentName, reason); 2674 final ArrayList<ActivityRecord> activities = task.mActivities; 2675 final int index = activities.indexOf(r); 2676 if (index < (activities.size() - 1)) { 2677 task.setFrontOfTask(); 2678 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2679 // If the caller asked that this activity (and all above it) 2680 // be cleared when the task is reset, don't lose that information, 2681 // but propagate it up to the next activity. 2682 ActivityRecord next = activities.get(index+1); 2683 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2684 } 2685 } 2686 2687 r.pauseKeyDispatchingLocked(); 2688 2689 adjustFocusedActivityLocked(r); 2690 2691 finishActivityResultsLocked(r, resultCode, resultData); 2692 2693 if (mResumedActivity == r) { 2694 boolean endTask = index <= 0; 2695 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2696 "Prepare close transition: finishing " + r); 2697 mWindowManager.prepareAppTransition(endTask 2698 ? AppTransition.TRANSIT_TASK_CLOSE 2699 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2700 2701 // Tell window manager to prepare for this one to be removed. 2702 mWindowManager.setAppVisibility(r.appToken, false); 2703 2704 if (mPausingActivity == null) { 2705 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2706 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2707 startPausingLocked(false, false); 2708 } 2709 2710 if (endTask) { 2711 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2712 } 2713 } else if (r.state != ActivityState.PAUSING) { 2714 // If the activity is PAUSING, we will complete the finish once 2715 // it is done pausing; else we can just directly finish it here. 2716 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2717 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2718 } else { 2719 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2720 } 2721 2722 return false; 2723 } 2724 2725 static final int FINISH_IMMEDIATELY = 0; 2726 static final int FINISH_AFTER_PAUSE = 1; 2727 static final int FINISH_AFTER_VISIBLE = 2; 2728 2729 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2730 // First things first: if this activity is currently visible, 2731 // and the resumed activity is not yet visible, then hold off on 2732 // finishing until the resumed one becomes visible. 2733 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2734 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2735 mStackSupervisor.mStoppingActivities.add(r); 2736 if (mStackSupervisor.mStoppingActivities.size() > 3 2737 || r.frontOfTask && mTaskHistory.size() <= 1) { 2738 // If we already have a few activities waiting to stop, 2739 // then give up on things going idle and start clearing 2740 // them out. Or if r is the last of activity of the last task the stack 2741 // will be empty and must be cleared immediately. 2742 mStackSupervisor.scheduleIdleLocked(); 2743 } else { 2744 mStackSupervisor.checkReadyForSleepLocked(); 2745 } 2746 } 2747 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2748 + " (finish requested)"); 2749 r.state = ActivityState.STOPPING; 2750 if (oomAdj) { 2751 mService.updateOomAdjLocked(); 2752 } 2753 return r; 2754 } 2755 2756 // make sure the record is cleaned out of other places. 2757 mStackSupervisor.mStoppingActivities.remove(r); 2758 mStackSupervisor.mGoingToSleepActivities.remove(r); 2759 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2760 if (mResumedActivity == r) { 2761 mResumedActivity = null; 2762 } 2763 final ActivityState prevState = r.state; 2764 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2765 r.state = ActivityState.FINISHING; 2766 2767 if (mode == FINISH_IMMEDIATELY 2768 || prevState == ActivityState.STOPPED 2769 || prevState == ActivityState.INITIALIZING) { 2770 // If this activity is already stopped, we can just finish 2771 // it right now. 2772 r.makeFinishing(); 2773 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2774 if (activityRemoved) { 2775 mStackSupervisor.resumeTopActivitiesLocked(); 2776 } 2777 if (DEBUG_CONTAINERS) Slog.d(TAG, 2778 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2779 " destroy returned removed=" + activityRemoved); 2780 return activityRemoved ? null : r; 2781 } 2782 2783 // Need to go through the full pause cycle to get this 2784 // activity into the stopped state and then finish it. 2785 if (localLOGV) Slog.v(TAG, "Enqueueing pending finish: " + r); 2786 mStackSupervisor.mFinishingActivities.add(r); 2787 r.resumeKeyDispatchingLocked(); 2788 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2789 return r; 2790 } 2791 2792 void finishAllActivitiesLocked(boolean immediately) { 2793 boolean noActivitiesInStack = true; 2794 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2795 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2796 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2797 final ActivityRecord r = activities.get(activityNdx); 2798 noActivitiesInStack = false; 2799 if (r.finishing && !immediately) { 2800 continue; 2801 } 2802 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2803 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2804 } 2805 } 2806 if (noActivitiesInStack) { 2807 mActivityContainer.onTaskListEmptyLocked(); 2808 } 2809 } 2810 2811 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2812 // Basic case: for simple app-centric recents, we need to recreate 2813 // the task if the affinity has changed. 2814 if (srec == null || srec.task.affinity == null || 2815 !srec.task.affinity.equals(destAffinity)) { 2816 return true; 2817 } 2818 // Document-centric case: an app may be split in to multiple documents; 2819 // they need to re-create their task if this current activity is the root 2820 // of a document, unless simply finishing it will return them to the the 2821 // correct app behind. 2822 if (srec.frontOfTask && srec.task != null) { 2823 // Okay, this activity is at the root of its task. What to do, what to do... 2824 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2825 // Finishing won't return to an application, so we need to recreate. 2826 return true; 2827 } 2828 // We now need to get the task below it to determine what to do. 2829 int taskIdx = mTaskHistory.indexOf(srec.task); 2830 if (taskIdx <= 0) { 2831 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2832 return false; 2833 } 2834 if (taskIdx == 0) { 2835 // At the bottom of the stack, nothing to go back to. 2836 return true; 2837 } 2838 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2839 if (!srec.task.affinity.equals(prevTask.affinity)) { 2840 // These are different apps, so need to recreate. 2841 return true; 2842 } 2843 } 2844 return false; 2845 } 2846 2847 final boolean navigateUpToLocked(IBinder token, Intent destIntent, int resultCode, 2848 Intent resultData) { 2849 final ActivityRecord srec = ActivityRecord.forToken(token); 2850 final TaskRecord task = srec.task; 2851 final ArrayList<ActivityRecord> activities = task.mActivities; 2852 final int start = activities.indexOf(srec); 2853 if (!mTaskHistory.contains(task) || (start < 0)) { 2854 return false; 2855 } 2856 int finishTo = start - 1; 2857 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 2858 boolean foundParentInTask = false; 2859 final ComponentName dest = destIntent.getComponent(); 2860 if (start > 0 && dest != null) { 2861 for (int i = finishTo; i >= 0; i--) { 2862 ActivityRecord r = activities.get(i); 2863 if (r.info.packageName.equals(dest.getPackageName()) && 2864 r.info.name.equals(dest.getClassName())) { 2865 finishTo = i; 2866 parent = r; 2867 foundParentInTask = true; 2868 break; 2869 } 2870 } 2871 } 2872 2873 IActivityController controller = mService.mController; 2874 if (controller != null) { 2875 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 2876 if (next != null) { 2877 // ask watcher if this is allowed 2878 boolean resumeOK = true; 2879 try { 2880 resumeOK = controller.activityResuming(next.packageName); 2881 } catch (RemoteException e) { 2882 mService.mController = null; 2883 Watchdog.getInstance().setActivityController(null); 2884 } 2885 2886 if (!resumeOK) { 2887 return false; 2888 } 2889 } 2890 } 2891 final long origId = Binder.clearCallingIdentity(); 2892 for (int i = start; i > finishTo; i--) { 2893 ActivityRecord r = activities.get(i); 2894 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 2895 // Only return the supplied result for the first activity finished 2896 resultCode = Activity.RESULT_CANCELED; 2897 resultData = null; 2898 } 2899 2900 if (parent != null && foundParentInTask) { 2901 final int parentLaunchMode = parent.info.launchMode; 2902 final int destIntentFlags = destIntent.getFlags(); 2903 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 2904 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 2905 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 2906 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 2907 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent); 2908 } else { 2909 try { 2910 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 2911 destIntent.getComponent(), 0, srec.userId); 2912 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 2913 null, aInfo, null, null, parent.appToken, null, 2914 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 2915 0, null, true, null, null, null); 2916 foundParentInTask = res == ActivityManager.START_SUCCESS; 2917 } catch (RemoteException e) { 2918 foundParentInTask = false; 2919 } 2920 requestFinishActivityLocked(parent.appToken, resultCode, 2921 resultData, "navigate-up", true); 2922 } 2923 } 2924 Binder.restoreCallingIdentity(origId); 2925 return foundParentInTask; 2926 } 2927 /** 2928 * Perform the common clean-up of an activity record. This is called both 2929 * as part of destroyActivityLocked() (when destroying the client-side 2930 * representation) and cleaning things up as a result of its hosting 2931 * processing going away, in which case there is no remaining client-side 2932 * state to destroy so only the cleanup here is needed. 2933 */ 2934 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 2935 boolean setState) { 2936 if (mResumedActivity == r) { 2937 mResumedActivity = null; 2938 } 2939 if (mPausingActivity == r) { 2940 mPausingActivity = null; 2941 } 2942 mService.clearFocusedActivity(r); 2943 2944 r.configDestroy = false; 2945 r.frozenBeforeDestroy = false; 2946 2947 if (setState) { 2948 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 2949 r.state = ActivityState.DESTROYED; 2950 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 2951 r.app = null; 2952 } 2953 2954 // Make sure this record is no longer in the pending finishes list. 2955 // This could happen, for example, if we are trimming activities 2956 // down to the max limit while they are still waiting to finish. 2957 mStackSupervisor.mFinishingActivities.remove(r); 2958 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2959 2960 // Remove any pending results. 2961 if (r.finishing && r.pendingResults != null) { 2962 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 2963 PendingIntentRecord rec = apr.get(); 2964 if (rec != null) { 2965 mService.cancelIntentSenderLocked(rec, false); 2966 } 2967 } 2968 r.pendingResults = null; 2969 } 2970 2971 if (cleanServices) { 2972 cleanUpActivityServicesLocked(r); 2973 } 2974 2975 // Get rid of any pending idle timeouts. 2976 removeTimeoutsForActivityLocked(r); 2977 if (getVisibleBehindActivity() == r) { 2978 mStackSupervisor.requestVisibleBehindLocked(r, false); 2979 } 2980 } 2981 2982 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 2983 mStackSupervisor.removeTimeoutsForActivityLocked(r); 2984 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 2985 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 2986 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 2987 r.finishLaunchTickingLocked(); 2988 } 2989 2990 private void removeActivityFromHistoryLocked(ActivityRecord r) { 2991 mStackSupervisor.removeChildActivityContainers(r); 2992 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 2993 r.makeFinishing(); 2994 if (DEBUG_ADD_REMOVE) { 2995 RuntimeException here = new RuntimeException("here"); 2996 here.fillInStackTrace(); 2997 Slog.i(TAG, "Removing activity " + r + " from stack"); 2998 } 2999 r.takeFromHistory(); 3000 removeTimeoutsForActivityLocked(r); 3001 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3002 r.state = ActivityState.DESTROYED; 3003 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3004 r.app = null; 3005 mWindowManager.removeAppToken(r.appToken); 3006 if (VALIDATE_TOKENS) { 3007 validateAppTokensLocked(); 3008 } 3009 final TaskRecord task = r.task; 3010 if (task != null && task.removeActivity(r)) { 3011 if (DEBUG_STACK) Slog.i(TAG, 3012 "removeActivityFromHistoryLocked: last activity removed from " + this); 3013 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3014 task.isOverHomeStack()) { 3015 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo()); 3016 } 3017 removeTask(task); 3018 } 3019 cleanUpActivityServicesLocked(r); 3020 r.removeUriPermissionsLocked(); 3021 } 3022 3023 /** 3024 * Perform clean-up of service connections in an activity record. 3025 */ 3026 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3027 // Throw away any services that have been bound by this activity. 3028 if (r.connections != null) { 3029 Iterator<ConnectionRecord> it = r.connections.iterator(); 3030 while (it.hasNext()) { 3031 ConnectionRecord c = it.next(); 3032 mService.mServices.removeConnectionLocked(c, null, r); 3033 } 3034 r.connections = null; 3035 } 3036 } 3037 3038 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3039 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3040 msg.obj = new ScheduleDestroyArgs(owner, reason); 3041 mHandler.sendMessage(msg); 3042 } 3043 3044 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3045 boolean lastIsOpaque = false; 3046 boolean activityRemoved = false; 3047 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3048 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3049 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3050 final ActivityRecord r = activities.get(activityNdx); 3051 if (r.finishing) { 3052 continue; 3053 } 3054 if (r.fullscreen) { 3055 lastIsOpaque = true; 3056 } 3057 if (owner != null && r.app != owner) { 3058 continue; 3059 } 3060 if (!lastIsOpaque) { 3061 continue; 3062 } 3063 if (r.isDestroyable()) { 3064 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3065 + " resumed=" + mResumedActivity 3066 + " pausing=" + mPausingActivity + " for reason " + reason); 3067 if (destroyActivityLocked(r, true, reason)) { 3068 activityRemoved = true; 3069 } 3070 } 3071 } 3072 } 3073 if (activityRemoved) { 3074 mStackSupervisor.resumeTopActivitiesLocked(); 3075 } 3076 } 3077 3078 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3079 if (r.isDestroyable()) { 3080 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3081 + " resumed=" + mResumedActivity 3082 + " pausing=" + mPausingActivity + " for reason " + reason); 3083 return destroyActivityLocked(r, true, reason); 3084 } 3085 return false; 3086 } 3087 3088 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3089 String reason) { 3090 // Iterate over tasks starting at the back (oldest) first. 3091 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3092 int maxTasks = tasks.size() / 4; 3093 if (maxTasks < 1) { 3094 maxTasks = 1; 3095 } 3096 int numReleased = 0; 3097 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3098 final TaskRecord task = mTaskHistory.get(taskNdx); 3099 if (!tasks.contains(task)) { 3100 continue; 3101 } 3102 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3103 int curNum = 0; 3104 final ArrayList<ActivityRecord> activities = task.mActivities; 3105 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3106 final ActivityRecord activity = activities.get(actNdx); 3107 if (activity.app == app && activity.isDestroyable()) { 3108 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3109 + " in state " + activity.state + " resumed=" + mResumedActivity 3110 + " pausing=" + mPausingActivity + " for reason " + reason); 3111 destroyActivityLocked(activity, true, reason); 3112 if (activities.get(actNdx) != activity) { 3113 // Was removed from list, back up so we don't miss the next one. 3114 actNdx--; 3115 } 3116 curNum++; 3117 } 3118 } 3119 if (curNum > 0) { 3120 numReleased += curNum; 3121 maxTasks--; 3122 if (mTaskHistory.get(taskNdx) != task) { 3123 // The entire task got removed, back up so we don't miss the next one. 3124 taskNdx--; 3125 } 3126 } 3127 } 3128 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3129 return numReleased; 3130 } 3131 3132 /** 3133 * Destroy the current CLIENT SIDE instance of an activity. This may be 3134 * called both when actually finishing an activity, or when performing 3135 * a configuration switch where we destroy the current client-side object 3136 * but then create a new client-side object for this same HistoryRecord. 3137 */ 3138 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3139 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3140 TAG, "Removing activity from " + reason + ": token=" + r 3141 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3142 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3143 r.userId, System.identityHashCode(r), 3144 r.task.taskId, r.shortComponentName, reason); 3145 3146 boolean removedFromHistory = false; 3147 3148 cleanUpActivityLocked(r, false, false); 3149 3150 final boolean hadApp = r.app != null; 3151 3152 if (hadApp) { 3153 if (removeFromApp) { 3154 r.app.activities.remove(r); 3155 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3156 mService.mHeavyWeightProcess = null; 3157 mService.mHandler.sendEmptyMessage( 3158 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3159 } 3160 if (r.app.activities.isEmpty()) { 3161 // No longer have activities, so update LRU list and oom adj. 3162 mService.updateLruProcessLocked(r.app, false, null); 3163 mService.updateOomAdjLocked(); 3164 } 3165 } 3166 3167 boolean skipDestroy = false; 3168 3169 try { 3170 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3171 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3172 r.configChangeFlags); 3173 } catch (Exception e) { 3174 // We can just ignore exceptions here... if the process 3175 // has crashed, our death notification will clean things 3176 // up. 3177 //Slog.w(TAG, "Exception thrown during finish", e); 3178 if (r.finishing) { 3179 removeActivityFromHistoryLocked(r); 3180 removedFromHistory = true; 3181 skipDestroy = true; 3182 } 3183 } 3184 3185 r.nowVisible = false; 3186 3187 // If the activity is finishing, we need to wait on removing it 3188 // from the list to give it a chance to do its cleanup. During 3189 // that time it may make calls back with its token so we need to 3190 // be able to find it on the list and so we don't want to remove 3191 // it from the list yet. Otherwise, we can just immediately put 3192 // it in the destroyed state since we are not removing it from the 3193 // list. 3194 if (r.finishing && !skipDestroy) { 3195 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3196 + " (destroy requested)"); 3197 r.state = ActivityState.DESTROYING; 3198 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3199 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3200 } else { 3201 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3202 r.state = ActivityState.DESTROYED; 3203 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3204 r.app = null; 3205 } 3206 } else { 3207 // remove this record from the history. 3208 if (r.finishing) { 3209 removeActivityFromHistoryLocked(r); 3210 removedFromHistory = true; 3211 } else { 3212 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3213 r.state = ActivityState.DESTROYED; 3214 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3215 r.app = null; 3216 } 3217 } 3218 3219 r.configChangeFlags = 0; 3220 3221 if (!mLRUActivities.remove(r) && hadApp) { 3222 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3223 } 3224 3225 return removedFromHistory; 3226 } 3227 3228 final void activityDestroyedLocked(IBinder token) { 3229 final long origId = Binder.clearCallingIdentity(); 3230 try { 3231 ActivityRecord r = ActivityRecord.forToken(token); 3232 if (r != null) { 3233 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3234 } 3235 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3236 3237 if (isInStackLocked(token) != null) { 3238 if (r.state == ActivityState.DESTROYING) { 3239 cleanUpActivityLocked(r, true, false); 3240 removeActivityFromHistoryLocked(r); 3241 } 3242 } 3243 mStackSupervisor.resumeTopActivitiesLocked(); 3244 } finally { 3245 Binder.restoreCallingIdentity(origId); 3246 } 3247 } 3248 3249 void releaseBackgroundResources() { 3250 if (hasVisibleBehindActivity() && 3251 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3252 final ActivityRecord r = getVisibleBehindActivity(); 3253 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3254 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3255 " thread=" + r.app.thread); 3256 if (r != null && r.app != null && r.app.thread != null) { 3257 try { 3258 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3259 } catch (RemoteException e) { 3260 } 3261 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3262 } else { 3263 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3264 backgroundResourcesReleased(r.appToken); 3265 } 3266 } 3267 } 3268 3269 final void backgroundResourcesReleased(IBinder token) { 3270 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3271 final ActivityRecord r = getVisibleBehindActivity(); 3272 if (r != null) { 3273 mStackSupervisor.mStoppingActivities.add(r); 3274 setVisibleBehindActivity(null); 3275 } 3276 mStackSupervisor.resumeTopActivitiesLocked(); 3277 } 3278 3279 boolean hasVisibleBehindActivity() { 3280 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3281 } 3282 3283 void setVisibleBehindActivity(ActivityRecord r) { 3284 if (isAttached()) { 3285 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3286 } 3287 } 3288 3289 ActivityRecord getVisibleBehindActivity() { 3290 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3291 } 3292 3293 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3294 ProcessRecord app, String listName) { 3295 int i = list.size(); 3296 if (DEBUG_CLEANUP) Slog.v( 3297 TAG, "Removing app " + app + " from list " + listName 3298 + " with " + i + " entries"); 3299 while (i > 0) { 3300 i--; 3301 ActivityRecord r = list.get(i); 3302 if (DEBUG_CLEANUP) Slog.v(TAG, "Record #" + i + " " + r); 3303 if (r.app == app) { 3304 if (DEBUG_CLEANUP) Slog.v(TAG, "---> REMOVING this entry!"); 3305 list.remove(i); 3306 removeTimeoutsForActivityLocked(r); 3307 } 3308 } 3309 } 3310 3311 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3312 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3313 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3314 "mStoppingActivities"); 3315 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3316 "mGoingToSleepActivities"); 3317 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3318 "mWaitingVisibleActivities"); 3319 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3320 "mFinishingActivities"); 3321 3322 boolean hasVisibleActivities = false; 3323 3324 // Clean out the history list. 3325 int i = numActivities(); 3326 if (DEBUG_CLEANUP) Slog.v( 3327 TAG, "Removing app " + app + " from history with " + i + " entries"); 3328 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3329 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3330 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3331 final ActivityRecord r = activities.get(activityNdx); 3332 --i; 3333 if (DEBUG_CLEANUP) Slog.v( 3334 TAG, "Record #" + i + " " + r + ": app=" + r.app); 3335 if (r.app == app) { 3336 boolean remove; 3337 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3338 // Don't currently have state for the activity, or 3339 // it is finishing -- always remove it. 3340 remove = true; 3341 } else if (r.launchCount > 2 && 3342 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3343 // We have launched this activity too many times since it was 3344 // able to run, so give up and remove it. 3345 remove = true; 3346 } else { 3347 // The process may be gone, but the activity lives on! 3348 remove = false; 3349 } 3350 if (remove) { 3351 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3352 RuntimeException here = new RuntimeException("here"); 3353 here.fillInStackTrace(); 3354 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3355 + ": haveState=" + r.haveState 3356 + " stateNotNeeded=" + r.stateNotNeeded 3357 + " finishing=" + r.finishing 3358 + " state=" + r.state, here); 3359 } 3360 if (!r.finishing) { 3361 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3362 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3363 r.userId, System.identityHashCode(r), 3364 r.task.taskId, r.shortComponentName, 3365 "proc died without state saved"); 3366 if (r.state == ActivityState.RESUMED) { 3367 mService.updateUsageStats(r, false); 3368 } 3369 } 3370 removeActivityFromHistoryLocked(r); 3371 3372 } else { 3373 // We have the current state for this activity, so 3374 // it can be restarted later when needed. 3375 if (localLOGV) Slog.v( 3376 TAG, "Keeping entry, setting app to null"); 3377 if (r.visible) { 3378 hasVisibleActivities = true; 3379 } 3380 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3381 + r); 3382 r.app = null; 3383 r.nowVisible = false; 3384 if (!r.haveState) { 3385 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3386 "App died, clearing saved state of " + r); 3387 r.icicle = null; 3388 } 3389 } 3390 3391 cleanUpActivityLocked(r, true, true); 3392 } 3393 } 3394 } 3395 3396 return hasVisibleActivities; 3397 } 3398 3399 final void updateTransitLocked(int transit, Bundle options) { 3400 if (options != null) { 3401 ActivityRecord r = topRunningActivityLocked(null); 3402 if (r != null && r.state != ActivityState.RESUMED) { 3403 r.updateOptionsLocked(options); 3404 } else { 3405 ActivityOptions.abort(options); 3406 } 3407 } 3408 mWindowManager.prepareAppTransition(transit, false); 3409 } 3410 3411 void updateTaskMovement(TaskRecord task, boolean toFront) { 3412 if (task.isPersistable) { 3413 task.mLastTimeMoved = System.currentTimeMillis(); 3414 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3415 // recently will be most negative, tasks sent to the bottom before that will be less 3416 // negative. Similarly for recent tasks moved to the top which will be most positive. 3417 if (!toFront) { 3418 task.mLastTimeMoved *= -1; 3419 } 3420 } 3421 } 3422 3423 void moveHomeStackTaskToTop(int homeStackTaskType) { 3424 final int top = mTaskHistory.size() - 1; 3425 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3426 final TaskRecord task = mTaskHistory.get(taskNdx); 3427 if (task.taskType == homeStackTaskType) { 3428 if (DEBUG_TASKS || DEBUG_STACK) 3429 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3430 mTaskHistory.remove(taskNdx); 3431 mTaskHistory.add(top, task); 3432 updateTaskMovement(task, true); 3433 mWindowManager.moveTaskToTop(task.taskId); 3434 return; 3435 } 3436 } 3437 } 3438 3439 final void moveTaskToFrontLocked(TaskRecord tr, ActivityRecord reason, Bundle options) { 3440 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3441 3442 final int numTasks = mTaskHistory.size(); 3443 final int index = mTaskHistory.indexOf(tr); 3444 if (numTasks == 0 || index < 0) { 3445 // nothing to do! 3446 if (reason != null && 3447 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3448 ActivityOptions.abort(options); 3449 } else { 3450 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3451 } 3452 return; 3453 } 3454 3455 moveToFront(); 3456 3457 // Shift all activities with this task up to the top 3458 // of the stack, keeping them in the same internal order. 3459 insertTaskAtTop(tr); 3460 3461 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3462 if (reason != null && 3463 (reason.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3464 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3465 ActivityRecord r = topRunningActivityLocked(null); 3466 if (r != null) { 3467 mNoAnimActivities.add(r); 3468 } 3469 ActivityOptions.abort(options); 3470 } else { 3471 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3472 } 3473 3474 mWindowManager.moveTaskToTop(tr.taskId); 3475 3476 mStackSupervisor.resumeTopActivitiesLocked(); 3477 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3478 3479 if (VALIDATE_TOKENS) { 3480 validateAppTokensLocked(); 3481 } 3482 } 3483 3484 /** 3485 * Worker method for rearranging history stack. Implements the function of moving all 3486 * activities for a specific task (gathering them if disjoint) into a single group at the 3487 * bottom of the stack. 3488 * 3489 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3490 * to premeptively cancel the move. 3491 * 3492 * @param taskId The taskId to collect and move to the bottom. 3493 * @return Returns true if the move completed, false if not. 3494 */ 3495 final boolean moveTaskToBackLocked(int taskId, ActivityRecord reason) { 3496 final TaskRecord tr = taskForIdLocked(taskId); 3497 if (tr == null) { 3498 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3499 return false; 3500 } 3501 3502 Slog.i(TAG, "moveTaskToBack: " + tr); 3503 3504 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3505 3506 // If we have a watcher, preflight the move before committing to it. First check 3507 // for *other* available tasks, but if none are available, then try again allowing the 3508 // current task to be selected. 3509 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3510 ActivityRecord next = topRunningActivityLocked(null, taskId); 3511 if (next == null) { 3512 next = topRunningActivityLocked(null, 0); 3513 } 3514 if (next != null) { 3515 // ask watcher if this is allowed 3516 boolean moveOK = true; 3517 try { 3518 moveOK = mService.mController.activityResuming(next.packageName); 3519 } catch (RemoteException e) { 3520 mService.mController = null; 3521 Watchdog.getInstance().setActivityController(null); 3522 } 3523 if (!moveOK) { 3524 return false; 3525 } 3526 } 3527 } 3528 3529 if (DEBUG_TRANSITION) Slog.v(TAG, 3530 "Prepare to back transition: task=" + taskId); 3531 3532 mTaskHistory.remove(tr); 3533 mTaskHistory.add(0, tr); 3534 updateTaskMovement(tr, false); 3535 3536 // There is an assumption that moving a task to the back moves it behind the home activity. 3537 // We make sure here that some activity in the stack will launch home. 3538 int numTasks = mTaskHistory.size(); 3539 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3540 final TaskRecord task = mTaskHistory.get(taskNdx); 3541 if (task.isOverHomeStack()) { 3542 break; 3543 } 3544 if (taskNdx == 1) { 3545 // Set the last task before tr to go to home. 3546 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3547 } 3548 } 3549 3550 if (reason != null && 3551 (reason.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 3552 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3553 ActivityRecord r = topRunningActivityLocked(null); 3554 if (r != null) { 3555 mNoAnimActivities.add(r); 3556 } 3557 } else { 3558 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3559 } 3560 mWindowManager.moveTaskToBottom(taskId); 3561 3562 if (VALIDATE_TOKENS) { 3563 validateAppTokensLocked(); 3564 } 3565 3566 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3567 if (task == tr && tr.isOverHomeStack() || numTasks <= 1 && isOnHomeDisplay()) { 3568 final int taskToReturnTo = tr.getTaskToReturnTo(); 3569 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3570 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null); 3571 } 3572 3573 mStackSupervisor.resumeTopActivitiesLocked(); 3574 return true; 3575 } 3576 3577 static final void logStartActivity(int tag, ActivityRecord r, 3578 TaskRecord task) { 3579 final Uri data = r.intent.getData(); 3580 final String strData = data != null ? data.toSafeString() : null; 3581 3582 EventLog.writeEvent(tag, 3583 r.userId, System.identityHashCode(r), task.taskId, 3584 r.shortComponentName, r.intent.getAction(), 3585 r.intent.getType(), strData, r.intent.getFlags()); 3586 } 3587 3588 /** 3589 * Make sure the given activity matches the current configuration. Returns 3590 * false if the activity had to be destroyed. Returns true if the 3591 * configuration is the same, or the activity will remain running as-is 3592 * for whatever reason. Ensures the HistoryRecord is updated with the 3593 * correct configuration and all other bookkeeping is handled. 3594 */ 3595 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3596 int globalChanges) { 3597 if (mConfigWillChange) { 3598 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3599 "Skipping config check (will change): " + r); 3600 return true; 3601 } 3602 3603 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3604 "Ensuring correct configuration: " + r); 3605 3606 // Short circuit: if the two configurations are the exact same 3607 // object (the common case), then there is nothing to do. 3608 Configuration newConfig = mService.mConfiguration; 3609 if (r.configuration == newConfig && !r.forceNewConfig) { 3610 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3611 "Configuration unchanged in " + r); 3612 return true; 3613 } 3614 3615 // We don't worry about activities that are finishing. 3616 if (r.finishing) { 3617 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3618 "Configuration doesn't matter in finishing " + r); 3619 r.stopFreezingScreenLocked(false); 3620 return true; 3621 } 3622 3623 // Okay we now are going to make this activity have the new config. 3624 // But then we need to figure out how it needs to deal with that. 3625 Configuration oldConfig = r.configuration; 3626 r.configuration = newConfig; 3627 3628 // Determine what has changed. May be nothing, if this is a config 3629 // that has come back from the app after going idle. In that case 3630 // we just want to leave the official config object now in the 3631 // activity and do nothing else. 3632 final int changes = oldConfig.diff(newConfig); 3633 if (changes == 0 && !r.forceNewConfig) { 3634 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3635 "Configuration no differences in " + r); 3636 return true; 3637 } 3638 3639 // If the activity isn't currently running, just leave the new 3640 // configuration and it will pick that up next time it starts. 3641 if (r.app == null || r.app.thread == null) { 3642 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3643 "Configuration doesn't matter not running " + r); 3644 r.stopFreezingScreenLocked(false); 3645 r.forceNewConfig = false; 3646 return true; 3647 } 3648 3649 // Figure out how to handle the changes between the configurations. 3650 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) { 3651 Slog.v(TAG, "Checking to restart " + r.info.name + ": changed=0x" 3652 + Integer.toHexString(changes) + ", handles=0x" 3653 + Integer.toHexString(r.info.getRealConfigChanged()) 3654 + ", newConfig=" + newConfig); 3655 } 3656 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3657 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3658 r.configChangeFlags |= changes; 3659 r.startFreezingScreenLocked(r.app, globalChanges); 3660 r.forceNewConfig = false; 3661 if (r.app == null || r.app.thread == null) { 3662 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3663 "Config is destroying non-running " + r); 3664 destroyActivityLocked(r, true, "config"); 3665 } else if (r.state == ActivityState.PAUSING) { 3666 // A little annoying: we are waiting for this activity to 3667 // finish pausing. Let's not do anything now, but just 3668 // flag that it needs to be restarted when done pausing. 3669 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3670 "Config is skipping already pausing " + r); 3671 r.configDestroy = true; 3672 return true; 3673 } else if (r.state == ActivityState.RESUMED) { 3674 // Try to optimize this case: the configuration is changing 3675 // and we need to restart the top, resumed activity. 3676 // Instead of doing the normal handshaking, just say 3677 // "restart!". 3678 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3679 "Config is relaunching resumed " + r); 3680 relaunchActivityLocked(r, r.configChangeFlags, true); 3681 r.configChangeFlags = 0; 3682 } else { 3683 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG, 3684 "Config is relaunching non-resumed " + r); 3685 relaunchActivityLocked(r, r.configChangeFlags, false); 3686 r.configChangeFlags = 0; 3687 } 3688 3689 // All done... tell the caller we weren't able to keep this 3690 // activity around. 3691 return false; 3692 } 3693 3694 // Default case: the activity can handle this new configuration, so 3695 // hand it over. Note that we don't need to give it the new 3696 // configuration, since we always send configuration changes to all 3697 // process when they happen so it can just use whatever configuration 3698 // it last got. 3699 if (r.app != null && r.app.thread != null) { 3700 try { 3701 if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + r); 3702 r.app.thread.scheduleActivityConfigurationChanged(r.appToken); 3703 } catch (RemoteException e) { 3704 // If process died, whatever. 3705 } 3706 } 3707 r.stopFreezingScreenLocked(false); 3708 3709 return true; 3710 } 3711 3712 private boolean relaunchActivityLocked(ActivityRecord r, 3713 int changes, boolean andResume) { 3714 List<ResultInfo> results = null; 3715 List<Intent> newIntents = null; 3716 if (andResume) { 3717 results = r.results; 3718 newIntents = r.newIntents; 3719 } 3720 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3721 + " with results=" + results + " newIntents=" + newIntents 3722 + " andResume=" + andResume); 3723 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3724 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3725 r.task.taskId, r.shortComponentName); 3726 3727 r.startFreezingScreenLocked(r.app, 0); 3728 3729 mStackSupervisor.removeChildActivityContainers(r); 3730 3731 try { 3732 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3733 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3734 + r); 3735 r.forceNewConfig = false; 3736 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, 3737 changes, !andResume, new Configuration(mService.mConfiguration)); 3738 // Note: don't need to call pauseIfSleepingLocked() here, because 3739 // the caller will only pass in 'andResume' if this activity is 3740 // currently resumed, which implies we aren't sleeping. 3741 } catch (RemoteException e) { 3742 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3743 } 3744 3745 if (andResume) { 3746 r.results = null; 3747 r.newIntents = null; 3748 r.state = ActivityState.RESUMED; 3749 } else { 3750 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3751 r.state = ActivityState.PAUSED; 3752 } 3753 3754 return true; 3755 } 3756 3757 boolean willActivityBeVisibleLocked(IBinder token) { 3758 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3759 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3760 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3761 final ActivityRecord r = activities.get(activityNdx); 3762 if (r.appToken == token) { 3763 return true; 3764 } 3765 if (r.fullscreen && !r.finishing) { 3766 return false; 3767 } 3768 } 3769 } 3770 final ActivityRecord r = ActivityRecord.forToken(token); 3771 if (r == null) { 3772 return false; 3773 } 3774 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3775 + " would have returned true for r=" + r); 3776 return !r.finishing; 3777 } 3778 3779 void closeSystemDialogsLocked() { 3780 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3781 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3782 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3783 final ActivityRecord r = activities.get(activityNdx); 3784 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3785 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3786 } 3787 } 3788 } 3789 } 3790 3791 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3792 boolean didSomething = false; 3793 TaskRecord lastTask = null; 3794 ComponentName homeActivity = null; 3795 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3796 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3797 int numActivities = activities.size(); 3798 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3799 ActivityRecord r = activities.get(activityNdx); 3800 final boolean samePackage = r.packageName.equals(name) 3801 || (name == null && r.userId == userId); 3802 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3803 && (samePackage || r.task == lastTask) 3804 && (r.app == null || evenPersistent || !r.app.persistent)) { 3805 if (!doit) { 3806 if (r.finishing) { 3807 // If this activity is just finishing, then it is not 3808 // interesting as far as something to stop. 3809 continue; 3810 } 3811 return true; 3812 } 3813 if (r.isHomeActivity()) { 3814 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 3815 Slog.i(TAG, "Skip force-stop again " + r); 3816 continue; 3817 } else { 3818 homeActivity = r.realActivity; 3819 } 3820 } 3821 didSomething = true; 3822 Slog.i(TAG, " Force finishing activity " + r); 3823 if (samePackage) { 3824 if (r.app != null) { 3825 r.app.removed = true; 3826 } 3827 r.app = null; 3828 } 3829 lastTask = r.task; 3830 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 3831 true)) { 3832 // r has been deleted from mActivities, accommodate. 3833 --numActivities; 3834 --activityNdx; 3835 } 3836 } 3837 } 3838 } 3839 return didSomething; 3840 } 3841 3842 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 3843 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3844 final TaskRecord task = mTaskHistory.get(taskNdx); 3845 ActivityRecord r = null; 3846 ActivityRecord top = null; 3847 int numActivities = 0; 3848 int numRunning = 0; 3849 final ArrayList<ActivityRecord> activities = task.mActivities; 3850 if (activities.isEmpty()) { 3851 continue; 3852 } 3853 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 3854 continue; 3855 } 3856 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3857 r = activities.get(activityNdx); 3858 3859 // Initialize state for next task if needed. 3860 if (top == null || (top.state == ActivityState.INITIALIZING)) { 3861 top = r; 3862 numActivities = numRunning = 0; 3863 } 3864 3865 // Add 'r' into the current task. 3866 numActivities++; 3867 if (r.app != null && r.app.thread != null) { 3868 numRunning++; 3869 } 3870 3871 if (localLOGV) Slog.v( 3872 TAG, r.intent.getComponent().flattenToShortString() 3873 + ": task=" + r.task); 3874 } 3875 3876 RunningTaskInfo ci = new RunningTaskInfo(); 3877 ci.id = task.taskId; 3878 ci.baseActivity = r.intent.getComponent(); 3879 ci.topActivity = top.intent.getComponent(); 3880 ci.lastActiveTime = task.lastActiveTime; 3881 3882 if (top.task != null) { 3883 ci.description = top.task.lastDescription; 3884 } 3885 ci.numActivities = numActivities; 3886 ci.numRunning = numRunning; 3887 //System.out.println( 3888 // "#" + maxNum + ": " + " descr=" + ci.description); 3889 list.add(ci); 3890 } 3891 } 3892 3893 public void unhandledBackLocked() { 3894 final int top = mTaskHistory.size() - 1; 3895 if (DEBUG_SWITCH) Slog.d( 3896 TAG, "Performing unhandledBack(): top activity at " + top); 3897 if (top >= 0) { 3898 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 3899 int activityTop = activities.size() - 1; 3900 if (activityTop > 0) { 3901 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 3902 "unhandled-back", true); 3903 } 3904 } 3905 } 3906 3907 /** 3908 * Reset local parameters because an app's activity died. 3909 * @param app The app of the activity that died. 3910 * @return result from removeHistoryRecordsForAppLocked. 3911 */ 3912 boolean handleAppDiedLocked(ProcessRecord app) { 3913 if (mPausingActivity != null && mPausingActivity.app == app) { 3914 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 3915 "App died while pausing: " + mPausingActivity); 3916 mPausingActivity = null; 3917 } 3918 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 3919 mLastPausedActivity = null; 3920 mLastNoHistoryActivity = null; 3921 } 3922 3923 return removeHistoryRecordsForAppLocked(app); 3924 } 3925 3926 void handleAppCrashLocked(ProcessRecord app) { 3927 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3928 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3929 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3930 final ActivityRecord r = activities.get(activityNdx); 3931 if (r.app == app) { 3932 Slog.w(TAG, " Force finishing activity " 3933 + r.intent.getComponent().flattenToShortString()); 3934 // Force the destroy to skip right to removal. 3935 r.app = null; 3936 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3937 } 3938 } 3939 } 3940 } 3941 3942 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 3943 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 3944 boolean printed = false; 3945 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3946 final TaskRecord task = mTaskHistory.get(taskNdx); 3947 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 3948 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 3949 dumpClient, dumpPackage, needSep, header, 3950 " Task id #" + task.taskId); 3951 if (printed) { 3952 header = null; 3953 } 3954 } 3955 return printed; 3956 } 3957 3958 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 3959 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 3960 3961 if ("all".equals(name)) { 3962 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3963 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 3964 } 3965 } else if ("top".equals(name)) { 3966 final int top = mTaskHistory.size() - 1; 3967 if (top >= 0) { 3968 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 3969 int listTop = list.size() - 1; 3970 if (listTop >= 0) { 3971 activities.add(list.get(listTop)); 3972 } 3973 } 3974 } else { 3975 ItemMatcher matcher = new ItemMatcher(); 3976 matcher.build(name); 3977 3978 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3979 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 3980 if (matcher.match(r1, r1.intent.getComponent())) { 3981 activities.add(r1); 3982 } 3983 } 3984 } 3985 } 3986 3987 return activities; 3988 } 3989 3990 ActivityRecord restartPackage(String packageName) { 3991 ActivityRecord starting = topRunningActivityLocked(null); 3992 3993 // All activities that came from the package must be 3994 // restarted as if there was a config change. 3995 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3996 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3997 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3998 final ActivityRecord a = activities.get(activityNdx); 3999 if (a.info.packageName.equals(packageName)) { 4000 a.forceNewConfig = true; 4001 if (starting != null && a == starting && a.visible) { 4002 a.startFreezingScreenLocked(starting.app, 4003 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4004 } 4005 } 4006 } 4007 } 4008 4009 return starting; 4010 } 4011 4012 void removeTask(TaskRecord task) { 4013 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4014 mWindowManager.removeTask(task.taskId); 4015 final ActivityRecord r = mResumedActivity; 4016 if (r != null && r.task == task) { 4017 mResumedActivity = null; 4018 } 4019 4020 final int taskNdx = mTaskHistory.indexOf(task); 4021 final int topTaskNdx = mTaskHistory.size() - 1; 4022 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4023 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4024 if (!nextTask.isOverHomeStack()) { 4025 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4026 } 4027 } 4028 mTaskHistory.remove(task); 4029 updateTaskMovement(task, true); 4030 4031 if (task.mActivities.isEmpty()) { 4032 final boolean isVoiceSession = task.voiceSession != null; 4033 if (isVoiceSession) { 4034 try { 4035 task.voiceSession.taskFinished(task.intent, task.taskId); 4036 } catch (RemoteException e) { 4037 } 4038 } 4039 if (task.autoRemoveFromRecents() || isVoiceSession) { 4040 // Task creator asked to remove this when done, or this task was a voice 4041 // interaction, so it should not remain on the recent tasks list. 4042 mService.mRecentTasks.remove(task); 4043 task.closeRecentsChain(); 4044 } 4045 } 4046 4047 if (mTaskHistory.isEmpty()) { 4048 if (DEBUG_STACK) Slog.i(TAG, "removeTask: moving to back stack=" + this); 4049 if (isOnHomeDisplay()) { 4050 mStackSupervisor.moveHomeStack(!isHomeStack()); 4051 } 4052 if (mStacks != null) { 4053 mStacks.remove(this); 4054 mStacks.add(0, this); 4055 } 4056 mActivityContainer.onTaskListEmptyLocked(); 4057 } 4058 } 4059 4060 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4061 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4062 boolean toTop) { 4063 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4064 voiceInteractor); 4065 addTask(task, toTop, false); 4066 return task; 4067 } 4068 4069 ArrayList<TaskRecord> getAllTasks() { 4070 return new ArrayList<TaskRecord>(mTaskHistory); 4071 } 4072 4073 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4074 task.stack = this; 4075 if (toTop) { 4076 insertTaskAtTop(task); 4077 } else { 4078 mTaskHistory.add(0, task); 4079 updateTaskMovement(task, false); 4080 } 4081 if (!moving && task.voiceSession != null) { 4082 try { 4083 task.voiceSession.taskStarted(task.intent, task.taskId); 4084 } catch (RemoteException e) { 4085 } 4086 } 4087 } 4088 4089 public int getStackId() { 4090 return mStackId; 4091 } 4092 4093 @Override 4094 public String toString() { 4095 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4096 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4097 } 4098} 4099