ActivityStack.java revision 07927bffa72e35ded65b5eff2815f1337715c416
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.ActivityManagerDebugConfig.*; 20import static com.android.server.am.ActivityManagerService.DEBUG_PAUSE; 21import static com.android.server.am.ActivityManagerService.DEBUG_RESULTS; 22import static com.android.server.am.ActivityManagerService.DEBUG_STACK; 23import static com.android.server.am.ActivityManagerService.DEBUG_SWITCH; 24import static com.android.server.am.ActivityManagerService.DEBUG_TASKS; 25import static com.android.server.am.ActivityManagerService.DEBUG_TRANSITION; 26import static com.android.server.am.ActivityManagerService.DEBUG_USER_LEAVING; 27import static com.android.server.am.ActivityManagerService.DEBUG_VISBILITY; 28 29import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 30import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 31 32import static com.android.server.am.ActivityStackSupervisor.DEBUG_ADD_REMOVE; 33import static com.android.server.am.ActivityStackSupervisor.DEBUG_APP; 34import static com.android.server.am.ActivityStackSupervisor.DEBUG_CONTAINERS; 35import static com.android.server.am.ActivityStackSupervisor.DEBUG_RELEASE; 36import static com.android.server.am.ActivityStackSupervisor.DEBUG_SAVED_STATE; 37import static com.android.server.am.ActivityStackSupervisor.DEBUG_SCREENSHOTS; 38import static com.android.server.am.ActivityStackSupervisor.DEBUG_STATES; 39import static com.android.server.am.ActivityStackSupervisor.HOME_STACK_ID; 40 41import android.util.ArraySet; 42import com.android.internal.app.IVoiceInteractor; 43import com.android.internal.content.ReferrerIntent; 44import com.android.internal.os.BatteryStatsImpl; 45import com.android.server.Watchdog; 46import com.android.server.am.ActivityManagerService.ItemMatcher; 47import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 48import com.android.server.wm.AppTransition; 49import com.android.server.wm.TaskGroup; 50import com.android.server.wm.WindowManagerService; 51 52import android.app.Activity; 53import android.app.ActivityManager; 54import android.app.ActivityOptions; 55import android.app.AppGlobals; 56import android.app.IActivityController; 57import android.app.ResultInfo; 58import android.app.ActivityManager.RunningTaskInfo; 59import android.content.ComponentName; 60import android.content.Intent; 61import android.content.pm.ActivityInfo; 62import android.content.pm.PackageManager; 63import android.content.res.Configuration; 64import android.graphics.Bitmap; 65import android.net.Uri; 66import android.os.Binder; 67import android.os.Bundle; 68import android.os.Debug; 69import android.os.Handler; 70import android.os.IBinder; 71import android.os.Looper; 72import android.os.Message; 73import android.os.PersistableBundle; 74import android.os.RemoteException; 75import android.os.SystemClock; 76import android.os.Trace; 77import android.os.UserHandle; 78import android.service.voice.IVoiceInteractionSession; 79import android.util.EventLog; 80import android.util.Slog; 81import android.view.Display; 82 83import java.io.FileDescriptor; 84import java.io.PrintWriter; 85import java.lang.ref.WeakReference; 86import java.util.ArrayList; 87import java.util.Iterator; 88import java.util.List; 89import java.util.Objects; 90 91/** 92 * State and management of a single stack of activities. 93 */ 94final class ActivityStack { 95 96 private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM; 97 private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP; 98 private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION; 99 100 private static final boolean VALIDATE_TOKENS = false; 101 102 // Ticks during which we check progress while waiting for an app to launch. 103 static final int LAUNCH_TICK = 500; 104 105 // How long we wait until giving up on the last activity to pause. This 106 // is short because it directly impacts the responsiveness of starting the 107 // next activity. 108 static final int PAUSE_TIMEOUT = 500; 109 110 // How long we wait for the activity to tell us it has stopped before 111 // giving up. This is a good amount of time because we really need this 112 // from the application in order to get its saved state. 113 static final int STOP_TIMEOUT = 10*1000; 114 115 // How long we wait until giving up on an activity telling us it has 116 // finished destroying itself. 117 static final int DESTROY_TIMEOUT = 10*1000; 118 119 // How long until we reset a task when the user returns to it. Currently 120 // disabled. 121 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 122 123 // How long between activity launches that we consider safe to not warn 124 // the user about an unexpected activity being launched on top. 125 static final long START_WARN_TIME = 5*1000; 126 127 // Set to false to disable the preview that is shown while a new activity 128 // is being started. 129 static final boolean SHOW_APP_STARTING_PREVIEW = true; 130 131 // How long to wait for all background Activities to redraw following a call to 132 // convertToTranslucent(). 133 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 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 private final RecentTasks mRecentTasks; 150 151 /** 152 * The back history of all previous (and possibly still 153 * running) activities. It contains #TaskRecord objects. 154 */ 155 private ArrayList<TaskRecord> mTaskHistory = new ArrayList<>(); 156 157 /** 158 * Used for validating app tokens with window manager. 159 */ 160 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<>(); 161 162 /** 163 * List of running activities, sorted by recent usage. 164 * The first entry in the list is the least recently used. 165 * It contains HistoryRecord objects. 166 */ 167 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<>(); 168 169 /** 170 * Animations that for the current transition have requested not to 171 * be considered for the transition animation. 172 */ 173 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<>(); 174 175 /** 176 * When we are in the process of pausing an activity, before starting the 177 * next one, this variable holds the activity that is currently being paused. 178 */ 179 ActivityRecord mPausingActivity = null; 180 181 /** 182 * This is the last activity that we put into the paused state. This is 183 * used to determine if we need to do an activity transition while sleeping, 184 * when we normally hold the top activity paused. 185 */ 186 ActivityRecord mLastPausedActivity = null; 187 188 /** 189 * Activities that specify No History must be removed once the user navigates away from them. 190 * If the device goes to sleep with such an activity in the paused state then we save it here 191 * and finish it later if another activity replaces it on wakeup. 192 */ 193 ActivityRecord mLastNoHistoryActivity = null; 194 195 /** 196 * Current activity that is resumed, or null if there is none. 197 */ 198 ActivityRecord mResumedActivity = null; 199 200 /** 201 * This is the last activity that has been started. It is only used to 202 * identify when multiple activities are started at once so that the user 203 * can be warned they may not be in the activity they think they are. 204 */ 205 ActivityRecord mLastStartedActivity = null; 206 207 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 208 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 209 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 210 // Activity in mTranslucentActivityWaiting is notified via 211 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 212 // background activity being drawn then the same call will be made with a true value. 213 ActivityRecord mTranslucentActivityWaiting = null; 214 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = 215 new ArrayList<ActivityRecord>(); 216 217 /** 218 * Set when we know we are going to be calling updateConfiguration() 219 * soon, so want to skip intermediate config checks. 220 */ 221 boolean mConfigWillChange; 222 223 // Whether or not this stack covers the entire screen; by default stacks are full screen 224 boolean mFullscreen = true; 225 226 long mLaunchStartTime = 0; 227 long mFullyDrawnStartTime = 0; 228 229 int mCurrentUser; 230 231 final int mStackId; 232 final ActivityContainer mActivityContainer; 233 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 234 ArrayList<ActivityStack> mStacks; 235 /** The attached Display's unique identifier, or -1 if detached */ 236 int mDisplayId; 237 238 /** Run all ActivityStacks through this */ 239 final ActivityStackSupervisor mStackSupervisor; 240 241 Configuration mOverrideConfig; 242 /** True if the stack was forced to full screen because {@link TaskRecord#mResizeable} is false 243 * and the stack was previously resized. */ 244 private boolean mForcedFullscreen = false; 245 246 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 247 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 248 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 249 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 250 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 251 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 252 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 253 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 254 255 static class ScheduleDestroyArgs { 256 final ProcessRecord mOwner; 257 final String mReason; 258 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 259 mOwner = owner; 260 mReason = reason; 261 } 262 } 263 264 final Handler mHandler; 265 266 final class ActivityStackHandler extends Handler { 267 268 ActivityStackHandler(Looper looper) { 269 super(looper); 270 } 271 272 @Override 273 public void handleMessage(Message msg) { 274 switch (msg.what) { 275 case PAUSE_TIMEOUT_MSG: { 276 ActivityRecord r = (ActivityRecord)msg.obj; 277 // We don't at this point know if the activity is fullscreen, 278 // so we need to be conservative and assume it isn't. 279 Slog.w(TAG, "Activity pause timeout for " + r); 280 synchronized (mService) { 281 if (r.app != null) { 282 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 283 } 284 activityPausedLocked(r.appToken, true); 285 } 286 } break; 287 case LAUNCH_TICK_MSG: { 288 ActivityRecord r = (ActivityRecord)msg.obj; 289 synchronized (mService) { 290 if (r.continueLaunchTickingLocked()) { 291 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 292 } 293 } 294 } break; 295 case DESTROY_TIMEOUT_MSG: { 296 ActivityRecord r = (ActivityRecord)msg.obj; 297 // We don't at this point know if the activity is fullscreen, 298 // so we need to be conservative and assume it isn't. 299 Slog.w(TAG, "Activity destroy timeout for " + r); 300 synchronized (mService) { 301 activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout"); 302 } 303 } break; 304 case STOP_TIMEOUT_MSG: { 305 ActivityRecord r = (ActivityRecord)msg.obj; 306 // We don't at this point know if the activity is fullscreen, 307 // so we need to be conservative and assume it isn't. 308 Slog.w(TAG, "Activity stop timeout for " + r); 309 synchronized (mService) { 310 if (r.isInHistory()) { 311 activityStoppedLocked(r, null, null, null); 312 } 313 } 314 } break; 315 case DESTROY_ACTIVITIES_MSG: { 316 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 317 synchronized (mService) { 318 destroyActivitiesLocked(args.mOwner, args.mReason); 319 } 320 } break; 321 case TRANSLUCENT_TIMEOUT_MSG: { 322 synchronized (mService) { 323 notifyActivityDrawnLocked(null); 324 } 325 } break; 326 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 327 synchronized (mService) { 328 final ActivityRecord r = getVisibleBehindActivity(); 329 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 330 if (r != null) { 331 mService.killAppAtUsersRequest(r.app, null); 332 } 333 } 334 } break; 335 } 336 } 337 } 338 339 int numActivities() { 340 int count = 0; 341 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 342 count += mTaskHistory.get(taskNdx).mActivities.size(); 343 } 344 return count; 345 } 346 347 int numTasks() { 348 return mTaskHistory.size(); 349 } 350 351 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer, 352 RecentTasks recentTasks) { 353 mActivityContainer = activityContainer; 354 mStackSupervisor = activityContainer.getOuter(); 355 mService = mStackSupervisor.mService; 356 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 357 mWindowManager = mService.mWindowManager; 358 mStackId = activityContainer.mStackId; 359 mCurrentUser = mService.mCurrentUserId; 360 mRecentTasks = recentTasks; 361 mOverrideConfig = Configuration.EMPTY; 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 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 433 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 434 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 435 final ActivityRecord r = activities.get(activityNdx); 436 if (!r.finishing) { 437 return r; 438 } 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.forTokenLocked(token); 464 return isInStackLocked(r); 465 } 466 467 ActivityRecord isInStackLocked(ActivityRecord r) { 468 if (r == null) { 469 return null; 470 } 471 final TaskRecord task = r.task; 472 if (task != null && task.stack != null 473 && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 474 if (task.stack != this) Slog.w(TAG, 475 "Illegal state! task does not point to stack it is in."); 476 return r; 477 } 478 return null; 479 } 480 481 final boolean updateLRUListLocked(ActivityRecord r) { 482 final boolean hadit = mLRUActivities.remove(r); 483 mLRUActivities.add(r); 484 return hadit; 485 } 486 487 final boolean isHomeStack() { 488 return mStackId == HOME_STACK_ID; 489 } 490 491 final boolean isOnHomeDisplay() { 492 return isAttached() && 493 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 494 } 495 496 final void moveToFront(String reason) { 497 if (isAttached()) { 498 final boolean homeStack = isHomeStack() 499 || (mActivityContainer.mParentActivity != null 500 && mActivityContainer.mParentActivity.isHomeActivity()); 501 ActivityStack lastFocusStack = null; 502 if (!homeStack) { 503 // Need to move this stack to the front before calling 504 // {@link ActivityStackSupervisor#moveHomeStack} below. 505 lastFocusStack = mStacks.get(mStacks.size() - 1); 506 mStacks.remove(this); 507 mStacks.add(this); 508 } 509 // TODO(multi-display): Focus stack currently adjusted in call to move home stack. 510 // Needs to also work if focus is moving to the non-home display. 511 if (isOnHomeDisplay()) { 512 mStackSupervisor.moveHomeStack(homeStack, reason, lastFocusStack); 513 } 514 final TaskRecord task = topTask(); 515 if (task != null) { 516 mWindowManager.moveTaskToTop(task.taskId); 517 } 518 } 519 } 520 521 final boolean isAttached() { 522 return mStacks != null; 523 } 524 525 /** 526 * Returns the top activity in any existing task matching the given 527 * Intent. Returns null if no such task is found. 528 */ 529 ActivityRecord findTaskLocked(ActivityRecord target) { 530 Intent intent = target.intent; 531 ActivityInfo info = target.info; 532 ComponentName cls = intent.getComponent(); 533 if (info.targetActivity != null) { 534 cls = new ComponentName(info.packageName, info.targetActivity); 535 } 536 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 537 boolean isDocument = intent != null & intent.isDocument(); 538 // If documentData is non-null then it must match the existing task data. 539 Uri documentData = isDocument ? intent.getData() : null; 540 541 if (DEBUG_TASKS) Slog.d(TAG, "Looking for task of " + target + " in " + this); 542 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 543 final TaskRecord task = mTaskHistory.get(taskNdx); 544 if (task.voiceSession != null) { 545 // We never match voice sessions; those always run independently. 546 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": voice session"); 547 continue; 548 } 549 if (task.userId != userId) { 550 // Looking for a different task. 551 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": different user"); 552 continue; 553 } 554 final ActivityRecord r = task.getTopActivity(); 555 if (r == null || r.finishing || r.userId != userId || 556 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 557 if (DEBUG_TASKS) Slog.d(TAG, "Skipping " + task + ": mismatch root " + r); 558 continue; 559 } 560 561 final Intent taskIntent = task.intent; 562 final Intent affinityIntent = task.affinityIntent; 563 final boolean taskIsDocument; 564 final Uri taskDocumentData; 565 if (taskIntent != null && taskIntent.isDocument()) { 566 taskIsDocument = true; 567 taskDocumentData = taskIntent.getData(); 568 } else if (affinityIntent != null && affinityIntent.isDocument()) { 569 taskIsDocument = true; 570 taskDocumentData = affinityIntent.getData(); 571 } else { 572 taskIsDocument = false; 573 taskDocumentData = null; 574 } 575 576 if (DEBUG_TASKS) Slog.d(TAG, "Comparing existing cls=" 577 + taskIntent.getComponent().flattenToShortString() 578 + "/aff=" + r.task.rootAffinity + " to new cls=" 579 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 580 if (!isDocument && !taskIsDocument && task.rootAffinity != null) { 581 if (task.rootAffinity.equals(target.taskAffinity)) { 582 if (DEBUG_TASKS) Slog.d(TAG, "Found matching affinity!"); 583 return r; 584 } 585 } else if (taskIntent != null && taskIntent.getComponent() != null && 586 taskIntent.getComponent().compareTo(cls) == 0 && 587 Objects.equals(documentData, taskDocumentData)) { 588 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 589 //dump(); 590 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 591 + r.intent); 592 return r; 593 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 594 affinityIntent.getComponent().compareTo(cls) == 0 && 595 Objects.equals(documentData, taskDocumentData)) { 596 if (DEBUG_TASKS) Slog.d(TAG, "Found matching class!"); 597 //dump(); 598 if (DEBUG_TASKS) Slog.d(TAG, "For Intent " + intent + " bringing to top: " 599 + r.intent); 600 return r; 601 } else if (DEBUG_TASKS) { 602 Slog.d(TAG, "Not a match: " + task); 603 } 604 } 605 606 return null; 607 } 608 609 /** 610 * Returns the first activity (starting from the top of the stack) that 611 * is the same as the given activity. Returns null if no such activity 612 * is found. 613 */ 614 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 615 ComponentName cls = intent.getComponent(); 616 if (info.targetActivity != null) { 617 cls = new ComponentName(info.packageName, info.targetActivity); 618 } 619 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 620 621 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 622 TaskRecord task = mTaskHistory.get(taskNdx); 623 if (!isCurrentProfileLocked(task.userId)) { 624 return null; 625 } 626 final ArrayList<ActivityRecord> activities = task.mActivities; 627 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 628 ActivityRecord r = activities.get(activityNdx); 629 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 630 //Slog.i(TAG, "Found matching class!"); 631 //dump(); 632 //Slog.i(TAG, "For Intent " + intent + " bringing to top: " + r.intent); 633 return r; 634 } 635 } 636 } 637 638 return null; 639 } 640 641 /* 642 * Move the activities around in the stack to bring a user to the foreground. 643 */ 644 final void switchUserLocked(int userId) { 645 if (mCurrentUser == userId) { 646 return; 647 } 648 mCurrentUser = userId; 649 650 // Move userId's tasks to the top. 651 int index = mTaskHistory.size(); 652 for (int i = 0; i < index; ) { 653 TaskRecord task = mTaskHistory.get(i); 654 if (isCurrentProfileLocked(task.userId)) { 655 if (DEBUG_TASKS) Slog.d(TAG, "switchUserLocked: stack=" + getStackId() + 656 " moving " + task + " to top"); 657 mTaskHistory.remove(i); 658 mTaskHistory.add(task); 659 --index; 660 // Use same value for i. 661 } else { 662 ++i; 663 } 664 } 665 if (VALIDATE_TOKENS) { 666 validateAppTokensLocked(); 667 } 668 } 669 670 void minimalResumeActivityLocked(ActivityRecord r) { 671 r.state = ActivityState.RESUMED; 672 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + r 673 + " (starting new instance)"); 674 r.stopped = false; 675 mResumedActivity = r; 676 r.task.touchActiveTime(); 677 mRecentTasks.addLocked(r.task); 678 completeResumeLocked(r); 679 mStackSupervisor.checkReadyForSleepLocked(); 680 setLaunchTime(r); 681 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Launch completed; removing icicle of " + r.icicle); 682 } 683 684 private void startLaunchTraces() { 685 if (mFullyDrawnStartTime != 0) { 686 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 687 } 688 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching", 0); 689 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 690 } 691 692 private void stopFullyDrawnTraceIfNeeded() { 693 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 694 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 695 mFullyDrawnStartTime = 0; 696 } 697 } 698 699 void setLaunchTime(ActivityRecord r) { 700 if (r.displayStartTime == 0) { 701 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 702 if (mLaunchStartTime == 0) { 703 startLaunchTraces(); 704 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 705 } 706 } else if (mLaunchStartTime == 0) { 707 startLaunchTraces(); 708 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 709 } 710 } 711 712 void clearLaunchTime(ActivityRecord r) { 713 // Make sure that there is no activity waiting for this to launch. 714 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 715 r.displayStartTime = r.fullyDrawnStartTime = 0; 716 } else { 717 mStackSupervisor.removeTimeoutsForActivityLocked(r); 718 mStackSupervisor.scheduleIdleTimeoutLocked(r); 719 } 720 } 721 722 void awakeFromSleepingLocked() { 723 // Ensure activities are no longer sleeping. 724 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 725 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 726 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 727 activities.get(activityNdx).setSleeping(false); 728 } 729 } 730 if (mPausingActivity != null) { 731 Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); 732 activityPausedLocked(mPausingActivity.appToken, true); 733 } 734 } 735 736 /** 737 * @return true if something must be done before going to sleep. 738 */ 739 boolean checkReadyForSleepLocked() { 740 if (mResumedActivity != null) { 741 // Still have something resumed; can't sleep until it is paused. 742 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep needs to pause " + mResumedActivity); 743 if (DEBUG_USER_LEAVING) Slog.v(TAG, "Sleep => pause with userLeaving=false"); 744 startPausingLocked(false, true, false, false); 745 return true; 746 } 747 if (mPausingActivity != null) { 748 // Still waiting for something to pause; can't sleep yet. 749 if (DEBUG_PAUSE) Slog.v(TAG, "Sleep still waiting to pause " + mPausingActivity); 750 return true; 751 } 752 753 return false; 754 } 755 756 void goToSleep() { 757 ensureActivitiesVisibleLocked(null, 0); 758 759 // Make sure any stopped but visible activities are now sleeping. 760 // This ensures that the activity's onStop() is called. 761 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 762 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 763 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 764 final ActivityRecord r = activities.get(activityNdx); 765 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED) { 766 r.setSleeping(true); 767 } 768 } 769 } 770 } 771 772 public final Bitmap screenshotActivities(ActivityRecord who) { 773 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "screenshotActivities: " + who); 774 if (who.noDisplay) { 775 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tNo display"); 776 return null; 777 } 778 779 if (isHomeStack()) { 780 // This is an optimization -- since we never show Home or Recents within Recents itself, 781 // we can just go ahead and skip taking the screenshot if this is the home stack. 782 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tHome stack"); 783 return null; 784 } 785 786 int w = mService.mThumbnailWidth; 787 int h = mService.mThumbnailHeight; 788 if (w > 0) { 789 if (DEBUG_SCREENSHOTS) Slog.d(TAG, "\tTaking screenshot"); 790 return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, 791 w, h); 792 } 793 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 794 return null; 795 } 796 797 /** 798 * Start pausing the currently resumed activity. It is an error to call this if there 799 * is already an activity being paused or there is no resumed activity. 800 * 801 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 802 * @param uiSleeping True if this is happening with the user interface going to sleep (the 803 * screen turning off). 804 * @param resuming True if this is being called as part of resuming the top activity, so 805 * we shouldn't try to instigate a resume here. 806 * @param dontWait True if the caller does not want to wait for the pause to complete. If 807 * set to true, we will immediately complete the pause here before returning. 808 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 809 * it to tell us when it is done. 810 */ 811 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 812 boolean dontWait) { 813 if (mPausingActivity != null) { 814 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity); 815 completePauseLocked(false); 816 } 817 ActivityRecord prev = mResumedActivity; 818 if (prev == null) { 819 if (!resuming) { 820 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 821 mStackSupervisor.resumeTopActivitiesLocked(); 822 } 823 return false; 824 } 825 826 if (mActivityContainer.mParentActivity == null) { 827 // Top level stack, not a child. Look for child stacks. 828 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 829 } 830 831 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSING: " + prev); 832 else if (DEBUG_PAUSE) Slog.v(TAG, "Start pausing: " + prev); 833 mResumedActivity = null; 834 mPausingActivity = prev; 835 mLastPausedActivity = prev; 836 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 837 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 838 prev.state = ActivityState.PAUSING; 839 prev.task.touchActiveTime(); 840 clearLaunchTime(prev); 841 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 842 if (mService.mHasRecents && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 843 prev.updateThumbnailLocked(screenshotActivities(prev), null); 844 } 845 stopFullyDrawnTraceIfNeeded(); 846 847 mService.updateCpuStats(); 848 849 if (prev.app != null && prev.app.thread != null) { 850 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending pause: " + prev); 851 try { 852 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 853 prev.userId, System.identityHashCode(prev), 854 prev.shortComponentName); 855 mService.updateUsageStats(prev, false); 856 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 857 userLeaving, prev.configChangeFlags, dontWait); 858 } catch (Exception e) { 859 // Ignore exception, if process died other code will cleanup. 860 Slog.w(TAG, "Exception thrown during pause", e); 861 mPausingActivity = null; 862 mLastPausedActivity = null; 863 mLastNoHistoryActivity = null; 864 } 865 } else { 866 mPausingActivity = null; 867 mLastPausedActivity = null; 868 mLastNoHistoryActivity = null; 869 } 870 871 // If we are not going to sleep, we want to ensure the device is 872 // awake until the next activity is started. 873 if (!uiSleeping && !mService.isSleepingOrShuttingDown()) { 874 mStackSupervisor.acquireLaunchWakelock(); 875 } 876 877 if (mPausingActivity != null) { 878 // Have the window manager pause its key dispatching until the new 879 // activity has started. If we're pausing the activity just because 880 // the screen is being turned off and the UI is sleeping, don't interrupt 881 // key dispatch; the same activity will pick it up again on wakeup. 882 if (!uiSleeping) { 883 prev.pauseKeyDispatchingLocked(); 884 } else { 885 if (DEBUG_PAUSE) Slog.v(TAG, "Key dispatch not paused for screen off"); 886 } 887 888 if (dontWait) { 889 // If the caller said they don't want to wait for the pause, then complete 890 // the pause now. 891 completePauseLocked(false); 892 return false; 893 894 } else { 895 // Schedule a pause timeout in case the app doesn't respond. 896 // We don't give it much time because this directly impacts the 897 // responsiveness seen by the user. 898 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 899 msg.obj = prev; 900 prev.pauseTime = SystemClock.uptimeMillis(); 901 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 902 if (DEBUG_PAUSE) Slog.v(TAG, "Waiting for pause to complete..."); 903 return true; 904 } 905 906 } else { 907 // This activity failed to schedule the 908 // pause, so just treat it as being paused now. 909 if (DEBUG_PAUSE) Slog.v(TAG, "Activity not running, resuming next."); 910 if (!resuming) { 911 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 912 } 913 return false; 914 } 915 } 916 917 final void activityPausedLocked(IBinder token, boolean timeout) { 918 if (DEBUG_PAUSE) Slog.v( 919 TAG, "Activity paused: token=" + token + ", timeout=" + timeout); 920 921 final ActivityRecord r = isInStackLocked(token); 922 if (r != null) { 923 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 924 if (mPausingActivity == r) { 925 if (DEBUG_STATES) Slog.v(TAG, "Moving to PAUSED: " + r 926 + (timeout ? " (due to timeout)" : " (pause complete)")); 927 completePauseLocked(true); 928 } else { 929 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 930 r.userId, System.identityHashCode(r), r.shortComponentName, 931 mPausingActivity != null 932 ? mPausingActivity.shortComponentName : "(none)"); 933 } 934 } 935 } 936 937 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 938 PersistableBundle persistentState, CharSequence description) { 939 if (r.state != ActivityState.STOPPING) { 940 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 941 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 942 return; 943 } 944 if (persistentState != null) { 945 r.persistentState = persistentState; 946 mService.notifyTaskPersisterLocked(r.task, false); 947 } 948 if (DEBUG_SAVED_STATE) Slog.i(TAG, "Saving icicle of " + r + ": " + icicle); 949 if (icicle != null) { 950 // If icicle is null, this is happening due to a timeout, so we 951 // haven't really saved the state. 952 r.icicle = icicle; 953 r.haveState = true; 954 r.launchCount = 0; 955 r.updateThumbnailLocked(null, description); 956 } 957 if (!r.stopped) { 958 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPED: " + r + " (stop complete)"); 959 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 960 r.stopped = true; 961 r.state = ActivityState.STOPPED; 962 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == r) { 963 mStackSupervisor.requestVisibleBehindLocked(r, false); 964 } 965 if (r.finishing) { 966 r.clearOptionsLocked(); 967 } else { 968 if (r.configDestroy) { 969 destroyActivityLocked(r, true, "stop-config"); 970 mStackSupervisor.resumeTopActivitiesLocked(); 971 } else { 972 mStackSupervisor.updatePreviousProcessLocked(r); 973 } 974 } 975 } 976 } 977 978 private void completePauseLocked(boolean resumeNext) { 979 ActivityRecord prev = mPausingActivity; 980 if (DEBUG_PAUSE) Slog.v(TAG, "Complete pause: " + prev); 981 982 if (prev != null) { 983 prev.state = ActivityState.PAUSED; 984 if (prev.finishing) { 985 if (DEBUG_PAUSE) Slog.v(TAG, "Executing finish of activity: " + prev); 986 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 987 } else if (prev.app != null) { 988 if (DEBUG_PAUSE) Slog.v(TAG, "Enqueueing pending stop: " + prev); 989 if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { 990 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v( 991 TAG, "Complete pause, no longer waiting: " + prev); 992 } 993 if (prev.configDestroy) { 994 // The previous is being paused because the configuration 995 // is changing, which means it is actually stopping... 996 // To juggle the fact that we are also starting a new 997 // instance right now, we need to first completely stop 998 // the current instance before starting the new one. 999 if (DEBUG_PAUSE) Slog.v(TAG, "Destroying after pause: " + prev); 1000 destroyActivityLocked(prev, true, "pause-config"); 1001 } else if (!hasVisibleBehindActivity()) { 1002 // If we were visible then resumeTopActivities will release resources before 1003 // stopping. 1004 mStackSupervisor.mStoppingActivities.add(prev); 1005 if (mStackSupervisor.mStoppingActivities.size() > 3 || 1006 prev.frontOfTask && mTaskHistory.size() <= 1) { 1007 // If we already have a few activities waiting to stop, 1008 // then give up on things going idle and start clearing 1009 // them out. Or if r is the last of activity of the last task the stack 1010 // will be empty and must be cleared immediately. 1011 if (DEBUG_PAUSE) Slog.v(TAG, "To many pending stops, forcing idle"); 1012 mStackSupervisor.scheduleIdleLocked(); 1013 } else { 1014 mStackSupervisor.checkReadyForSleepLocked(); 1015 } 1016 } 1017 } else { 1018 if (DEBUG_PAUSE) Slog.v(TAG, "App died during pause, not stopping: " + prev); 1019 prev = null; 1020 } 1021 // It is possible the activity was freezing the screen before it was paused. 1022 // In that case go ahead and remove the freeze this activity has on the screen 1023 // since it is no longer visible. 1024 prev.stopFreezingScreenLocked(true /*force*/); 1025 mPausingActivity = null; 1026 } 1027 1028 if (resumeNext) { 1029 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1030 if (!mService.isSleepingOrShuttingDown()) { 1031 mStackSupervisor.resumeTopActivitiesLocked(topStack, prev, null); 1032 } else { 1033 mStackSupervisor.checkReadyForSleepLocked(); 1034 ActivityRecord top = topStack.topRunningActivityLocked(null); 1035 if (top == null || (prev != null && top != prev)) { 1036 // If there are no more activities available to run, 1037 // do resume anyway to start something. Also if the top 1038 // activity on the stack is not the just paused activity, 1039 // we need to go ahead and resume it to ensure we complete 1040 // an in-flight app switch. 1041 mStackSupervisor.resumeTopActivitiesLocked(topStack, null, null); 1042 } 1043 } 1044 } 1045 1046 if (prev != null) { 1047 prev.resumeKeyDispatchingLocked(); 1048 1049 if (prev.app != null && prev.cpuTimeAtResume > 0 1050 && mService.mBatteryStatsService.isOnBattery()) { 1051 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1052 - prev.cpuTimeAtResume; 1053 if (diff > 0) { 1054 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1055 synchronized (bsi) { 1056 BatteryStatsImpl.Uid.Proc ps = 1057 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1058 prev.info.packageName); 1059 if (ps != null) { 1060 ps.addForegroundTimeLocked(diff); 1061 } 1062 } 1063 } 1064 } 1065 prev.cpuTimeAtResume = 0; // reset it 1066 } 1067 1068 // Notfiy when the task stack has changed 1069 mService.notifyTaskStackChangedLocked(); 1070 } 1071 1072 /** 1073 * Once we know that we have asked an application to put an activity in 1074 * the resumed state (either by launching it or explicitly telling it), 1075 * this function updates the rest of our state to match that fact. 1076 */ 1077 private void completeResumeLocked(ActivityRecord next) { 1078 next.idle = false; 1079 next.results = null; 1080 next.newIntents = null; 1081 1082 if (next.isHomeActivity() && next.isNotResolverActivity()) { 1083 ProcessRecord app = next.task.mActivities.get(0).app; 1084 if (app != null && app != mService.mHomeProcess) { 1085 mService.mHomeProcess = app; 1086 } 1087 } 1088 1089 if (next.nowVisible) { 1090 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1091 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1092 } 1093 1094 // schedule an idle timeout in case the app doesn't do it for us. 1095 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1096 1097 mStackSupervisor.reportResumedActivityLocked(next); 1098 1099 next.resumeKeyDispatchingLocked(); 1100 mNoAnimActivities.clear(); 1101 1102 // Mark the point when the activity is resuming 1103 // TODO: To be more accurate, the mark should be before the onCreate, 1104 // not after the onResume. But for subsequent starts, onResume is fine. 1105 if (next.app != null) { 1106 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1107 } else { 1108 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1109 } 1110 1111 next.returningOptions = null; 1112 1113 if (mActivityContainer.mActivityDisplay.mVisibleBehindActivity == next) { 1114 // When resuming an activity, require it to call requestVisibleBehind() again. 1115 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(null); 1116 } 1117 } 1118 1119 private void setVisible(ActivityRecord r, boolean visible) { 1120 r.visible = visible; 1121 mWindowManager.setAppVisibility(r.appToken, visible); 1122 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1123 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1124 ActivityContainer container = containers.get(containerNdx); 1125 container.setVisible(visible); 1126 } 1127 } 1128 1129 // Find the first visible activity above the passed activity and if it is translucent return it 1130 // otherwise return null; 1131 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1132 TaskRecord task = r.task; 1133 if (task == null) { 1134 return null; 1135 } 1136 1137 ActivityStack stack = task.stack; 1138 if (stack == null) { 1139 return null; 1140 } 1141 1142 int stackNdx = mStacks.indexOf(stack); 1143 1144 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1145 int taskNdx = tasks.indexOf(task); 1146 1147 ArrayList<ActivityRecord> activities = task.mActivities; 1148 int activityNdx = activities.indexOf(r) + 1; 1149 1150 final int numStacks = mStacks.size(); 1151 while (stackNdx < numStacks) { 1152 ActivityStack historyStack = mStacks.get(stackNdx); 1153 tasks = historyStack.mTaskHistory; 1154 final int numTasks = tasks.size(); 1155 while (taskNdx < numTasks) { 1156 activities = tasks.get(taskNdx).mActivities; 1157 final int numActivities = activities.size(); 1158 while (activityNdx < numActivities) { 1159 final ActivityRecord activity = activities.get(activityNdx); 1160 if (!activity.finishing) { 1161 return historyStack.mFullscreen && activity.fullscreen ? null : activity; 1162 } 1163 ++activityNdx; 1164 } 1165 activityNdx = 0; 1166 ++taskNdx; 1167 } 1168 taskNdx = 0; 1169 ++stackNdx; 1170 } 1171 1172 return null; 1173 } 1174 1175 private ActivityStack getNextVisibleStackLocked() { 1176 ArrayList<ActivityStack> stacks = mStacks; 1177 final ActivityRecord parent = mActivityContainer.mParentActivity; 1178 if (parent != null) { 1179 stacks = parent.task.stack.mStacks; 1180 } 1181 if (stacks != null) { 1182 for (int i = stacks.size() - 1; i >= 0; --i) { 1183 ActivityStack stack = stacks.get(i); 1184 if (stack != this && stack.isStackVisibleLocked()) { 1185 return stack; 1186 } 1187 } 1188 } 1189 return null; 1190 } 1191 1192 // Checks if any of the stacks above this one has a fullscreen activity behind it. 1193 // If so, this stack is hidden, otherwise it is visible. 1194 private boolean isStackVisibleLocked() { 1195 if (!isAttached()) { 1196 return false; 1197 } 1198 1199 if (mStackSupervisor.isFrontStack(this)) { 1200 return true; 1201 } 1202 1203 /** 1204 * Start at the task above this one and go up, looking for a visible 1205 * fullscreen activity, or a translucent activity that requested the 1206 * wallpaper to be shown behind it. 1207 */ 1208 for (int i = mStacks.indexOf(this) + 1; i < mStacks.size(); i++) { 1209 ActivityStack stack = mStacks.get(i); 1210 // stack above isn't full screen, so, we assume we're still visible. at some point 1211 // we should look at the stack bounds to see if we're occluded even if the stack 1212 // isn't fullscreen 1213 if (!stack.mFullscreen) { 1214 continue; 1215 } 1216 final ArrayList<TaskRecord> tasks = stack.getAllTasks(); 1217 for (int taskNdx = tasks.size() - 1; taskNdx >= 0; --taskNdx) { 1218 final TaskRecord task = tasks.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 1223 // Conditions for an activity to obscure the stack we're 1224 // examining: 1225 // 1. Not Finishing AND Visible AND: 1226 // 2. Either: 1227 // - Full Screen Activity OR 1228 // - On top of Home and our stack is NOT home 1229 if (!r.finishing && r.visible && (r.fullscreen || 1230 (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()))) { 1231 return false; 1232 } 1233 } 1234 } 1235 } 1236 1237 return true; 1238 } 1239 1240 /** 1241 * Make sure that all activities that need to be visible (that is, they 1242 * currently can be seen by the user) actually are. 1243 */ 1244 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges) { 1245 ActivityRecord top = topRunningActivityLocked(null); 1246 if (top == null) { 1247 return; 1248 } 1249 if (DEBUG_VISBILITY) Slog.v( 1250 TAG, "ensureActivitiesVisible behind " + top 1251 + " configChanges=0x" + Integer.toHexString(configChanges)); 1252 1253 if (mTranslucentActivityWaiting != top) { 1254 mUndrawnActivitiesBelowTopTranslucent.clear(); 1255 if (mTranslucentActivityWaiting != null) { 1256 // Call the callback with a timeout indication. 1257 notifyActivityDrawnLocked(null); 1258 mTranslucentActivityWaiting = null; 1259 } 1260 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1261 } 1262 1263 // If the top activity is not fullscreen, then we need to 1264 // make sure any activities under it are now visible. 1265 boolean aboveTop = true; 1266 boolean behindFullscreen = !isStackVisibleLocked(); 1267 1268 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1269 final TaskRecord task = mTaskHistory.get(taskNdx); 1270 final ArrayList<ActivityRecord> activities = task.mActivities; 1271 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1272 final ActivityRecord r = activities.get(activityNdx); 1273 if (r.finishing) { 1274 continue; 1275 } 1276 if (aboveTop && r != top) { 1277 continue; 1278 } 1279 aboveTop = false; 1280 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1281 // but must be drawn initially for the animation as though they were visible. 1282 if (!behindFullscreen || r.mLaunchTaskBehind) { 1283 if (DEBUG_VISBILITY) Slog.v( 1284 TAG, "Make visible? " + r + " finishing=" + r.finishing 1285 + " state=" + r.state); 1286 1287 // First: if this is not the current activity being started, make 1288 // sure it matches the current configuration. 1289 if (r != starting) { 1290 ensureActivityConfigurationLocked(r, 0); 1291 } 1292 1293 if (r.app == null || r.app.thread == null) { 1294 // This activity needs to be visible, but isn't even 1295 // running... get it started, but don't resume it 1296 // at this point. 1297 if (DEBUG_VISBILITY) Slog.v(TAG, "Start and freeze screen for " + r); 1298 if (r != starting) { 1299 r.startFreezingScreenLocked(r.app, configChanges); 1300 } 1301 if (!r.visible || r.mLaunchTaskBehind) { 1302 if (DEBUG_VISBILITY) Slog.v( 1303 TAG, "Starting and making visible: " + r); 1304 setVisible(r, true); 1305 } 1306 if (r != starting) { 1307 mStackSupervisor.startSpecificActivityLocked(r, false, false); 1308 } 1309 1310 } else if (r.visible) { 1311 // If this activity is already visible, then there is nothing 1312 // else to do here. 1313 if (DEBUG_VISBILITY) Slog.v(TAG, "Skipping: already visible at " + r); 1314 r.stopFreezingScreenLocked(false); 1315 try { 1316 if (r.returningOptions != null) { 1317 r.app.thread.scheduleOnNewActivityOptions(r.appToken, 1318 r.returningOptions); 1319 } 1320 } catch(RemoteException e) { 1321 } 1322 } else { 1323 // This activity is not currently visible, but is running. 1324 // Tell it to become visible. 1325 r.visible = true; 1326 if (r.state != ActivityState.RESUMED && r != starting) { 1327 // If this activity is paused, tell it 1328 // to now show its window. 1329 if (DEBUG_VISBILITY) Slog.v( 1330 TAG, "Making visible and scheduling visibility: " + r); 1331 try { 1332 if (mTranslucentActivityWaiting != null) { 1333 r.updateOptionsLocked(r.returningOptions); 1334 mUndrawnActivitiesBelowTopTranslucent.add(r); 1335 } 1336 setVisible(r, true); 1337 r.sleeping = false; 1338 r.app.pendingUiClean = true; 1339 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1340 r.stopFreezingScreenLocked(false); 1341 } catch (Exception e) { 1342 // Just skip on any failure; we'll make it 1343 // visible when it next restarts. 1344 Slog.w(TAG, "Exception thrown making visibile: " 1345 + r.intent.getComponent(), e); 1346 } 1347 } 1348 } 1349 1350 // Aggregate current change flags. 1351 configChanges |= r.configChangeFlags; 1352 1353 if (r.fullscreen) { 1354 // At this point, nothing else needs to be shown 1355 if (DEBUG_VISBILITY) Slog.v(TAG, "Fullscreen: at " + r); 1356 behindFullscreen = true; 1357 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1358 if (DEBUG_VISBILITY) Slog.v(TAG, "Showing home: at " + r); 1359 behindFullscreen = true; 1360 } 1361 } else { 1362 if (DEBUG_VISBILITY) Slog.v( 1363 TAG, "Make invisible? " + r + " finishing=" + r.finishing 1364 + " state=" + r.state 1365 + " behindFullscreen=" + behindFullscreen); 1366 // Now for any activities that aren't visible to the user, make 1367 // sure they no longer are keeping the screen frozen. 1368 if (r.visible) { 1369 if (DEBUG_VISBILITY) Slog.v(TAG, "Making invisible: " + r); 1370 try { 1371 setVisible(r, false); 1372 switch (r.state) { 1373 case STOPPING: 1374 case STOPPED: 1375 if (r.app != null && r.app.thread != null) { 1376 if (DEBUG_VISBILITY) Slog.v( 1377 TAG, "Scheduling invisibility: " + r); 1378 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1379 } 1380 break; 1381 1382 case INITIALIZING: 1383 case RESUMED: 1384 case PAUSING: 1385 case PAUSED: 1386 // This case created for transitioning activities from 1387 // translucent to opaque {@link Activity#convertToOpaque}. 1388 if (getVisibleBehindActivity() == r) { 1389 releaseBackgroundResources(r); 1390 } else { 1391 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1392 mStackSupervisor.mStoppingActivities.add(r); 1393 } 1394 mStackSupervisor.scheduleIdleLocked(); 1395 } 1396 break; 1397 1398 default: 1399 break; 1400 } 1401 } catch (Exception e) { 1402 // Just skip on any failure; we'll make it 1403 // visible when it next restarts. 1404 Slog.w(TAG, "Exception thrown making hidden: " 1405 + r.intent.getComponent(), e); 1406 } 1407 } else { 1408 if (DEBUG_VISBILITY) Slog.v(TAG, "Already invisible: " + r); 1409 } 1410 } 1411 } 1412 } 1413 1414 if (mTranslucentActivityWaiting != null && 1415 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1416 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1417 notifyActivityDrawnLocked(null); 1418 } 1419 } 1420 1421 void convertActivityToTranslucent(ActivityRecord r) { 1422 mTranslucentActivityWaiting = r; 1423 mUndrawnActivitiesBelowTopTranslucent.clear(); 1424 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1425 } 1426 1427 /** 1428 * Called as activities below the top translucent activity are redrawn. When the last one is 1429 * redrawn notify the top activity by calling 1430 * {@link Activity#onTranslucentConversionComplete}. 1431 * 1432 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1433 * occurred and the activity will be notified immediately. 1434 */ 1435 void notifyActivityDrawnLocked(ActivityRecord r) { 1436 mActivityContainer.setDrawn(); 1437 if ((r == null) 1438 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1439 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1440 // The last undrawn activity below the top has just been drawn. If there is an 1441 // opaque activity at the top, notify it that it can become translucent safely now. 1442 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1443 mTranslucentActivityWaiting = null; 1444 mUndrawnActivitiesBelowTopTranslucent.clear(); 1445 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1446 1447 if (waitingActivity != null) { 1448 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 1449 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 1450 try { 1451 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 1452 waitingActivity.appToken, r != null); 1453 } catch (RemoteException e) { 1454 } 1455 } 1456 } 1457 } 1458 } 1459 1460 /** If any activities below the top running one are in the INITIALIZING state and they have a 1461 * starting window displayed then remove that starting window. It is possible that the activity 1462 * in this state will never resumed in which case that starting window will be orphaned. */ 1463 void cancelInitializingActivities() { 1464 final ActivityRecord topActivity = topRunningActivityLocked(null); 1465 boolean aboveTop = true; 1466 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1467 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1468 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1469 final ActivityRecord r = activities.get(activityNdx); 1470 if (aboveTop) { 1471 if (r == topActivity) { 1472 aboveTop = false; 1473 } 1474 continue; 1475 } 1476 1477 if (r.state == ActivityState.INITIALIZING && r.mStartingWindowShown) { 1478 if (DEBUG_VISBILITY) Slog.w(TAG, "Found orphaned starting window " + r); 1479 r.mStartingWindowShown = false; 1480 mWindowManager.removeAppStartingWindow(r.appToken); 1481 } 1482 } 1483 } 1484 } 1485 1486 /** 1487 * Ensure that the top activity in the stack is resumed. 1488 * 1489 * @param prev The previously resumed activity, for when in the process 1490 * of pausing; can be null to call from elsewhere. 1491 * 1492 * @return Returns true if something is being resumed, or false if 1493 * nothing happened. 1494 */ 1495 final boolean resumeTopActivityLocked(ActivityRecord prev) { 1496 return resumeTopActivityLocked(prev, null); 1497 } 1498 1499 final boolean resumeTopActivityLocked(ActivityRecord prev, Bundle options) { 1500 if (mStackSupervisor.inResumeTopActivity) { 1501 // Don't even start recursing. 1502 return false; 1503 } 1504 1505 boolean result = false; 1506 try { 1507 // Protect against recursion. 1508 mStackSupervisor.inResumeTopActivity = true; 1509 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 1510 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 1511 mService.updateSleepIfNeededLocked(); 1512 } 1513 result = resumeTopActivityInnerLocked(prev, options); 1514 } finally { 1515 mStackSupervisor.inResumeTopActivity = false; 1516 } 1517 return result; 1518 } 1519 1520 private boolean resumeTopActivityInnerLocked(ActivityRecord prev, Bundle options) { 1521 if (ActivityManagerService.DEBUG_LOCKSCREEN) mService.logLockScreen(""); 1522 1523 if (!mService.mBooting && !mService.mBooted) { 1524 // Not ready yet! 1525 return false; 1526 } 1527 1528 ActivityRecord parent = mActivityContainer.mParentActivity; 1529 if ((parent != null && parent.state != ActivityState.RESUMED) || 1530 !mActivityContainer.isAttachedLocked()) { 1531 // Do not resume this stack if its parent is not resumed. 1532 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 1533 return false; 1534 } 1535 1536 cancelInitializingActivities(); 1537 1538 // Find the first activity that is not finishing. 1539 final ActivityRecord next = topRunningActivityLocked(null); 1540 1541 // Remember how we'll process this pause/resume situation, and ensure 1542 // that the state is reset however we wind up proceeding. 1543 final boolean userLeaving = mStackSupervisor.mUserLeaving; 1544 mStackSupervisor.mUserLeaving = false; 1545 1546 final TaskRecord prevTask = prev != null ? prev.task : null; 1547 if (next == null) { 1548 // There are no more activities! 1549 final String reason = "noMoreActivities"; 1550 if (!mFullscreen) { 1551 // Try to move focus to the next visible stack with a running activity if this 1552 // stack is not covering the entire screen. 1553 final ActivityStack stack = getNextVisibleStackLocked(); 1554 if (adjustFocusToNextVisibleStackLocked(stack, reason)) { 1555 return mStackSupervisor.resumeTopActivitiesLocked(stack, prev, null); 1556 } 1557 } 1558 // Let's just start up the Launcher... 1559 ActivityOptions.abort(options); 1560 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: No more activities go home"); 1561 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1562 // Only resume home if on home display 1563 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1564 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1565 return isOnHomeDisplay() && 1566 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); 1567 } 1568 1569 next.delayedResume = false; 1570 1571 // If the top activity is the resumed one, nothing to do. 1572 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 1573 mStackSupervisor.allResumedActivitiesComplete()) { 1574 // Make sure we have executed any pending transitions, since there 1575 // should be nothing left to do at this point. 1576 mWindowManager.executeAppTransition(); 1577 mNoAnimActivities.clear(); 1578 ActivityOptions.abort(options); 1579 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Top activity resumed " + next); 1580 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1581 return false; 1582 } 1583 1584 final TaskRecord nextTask = next.task; 1585 if (prevTask != null && prevTask.stack == this && 1586 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 1587 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1588 if (prevTask == nextTask) { 1589 prevTask.setFrontOfTask(); 1590 } else if (prevTask != topTask()) { 1591 // This task is going away but it was supposed to return to the home stack. 1592 // Now the task above it has to return to the home task instead. 1593 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 1594 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 1595 } else if (!isOnHomeDisplay()) { 1596 return false; 1597 } else if (!isHomeStack()){ 1598 if (DEBUG_STATES) Slog.d(TAG, 1599 "resumeTopActivityLocked: Launching home next"); 1600 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 1601 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 1602 return isOnHomeDisplay() && 1603 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); 1604 } 1605 } 1606 1607 // If we are sleeping, and there is no resumed activity, and the top 1608 // activity is paused, well that is the state we want. 1609 if (mService.isSleepingOrShuttingDown() 1610 && mLastPausedActivity == next 1611 && mStackSupervisor.allPausedActivitiesComplete()) { 1612 // Make sure we have executed any pending transitions, since there 1613 // should be nothing left to do at this point. 1614 mWindowManager.executeAppTransition(); 1615 mNoAnimActivities.clear(); 1616 ActivityOptions.abort(options); 1617 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Going to sleep and all paused"); 1618 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1619 return false; 1620 } 1621 1622 // Make sure that the user who owns this activity is started. If not, 1623 // we will just leave it as is because someone should be bringing 1624 // another user's activities to the top of the stack. 1625 if (mService.mStartedUsers.get(next.userId) == null) { 1626 Slog.w(TAG, "Skipping resume of top activity " + next 1627 + ": user " + next.userId + " is stopped"); 1628 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1629 return false; 1630 } 1631 1632 // The activity may be waiting for stop, but that is no longer 1633 // appropriate for it. 1634 mStackSupervisor.mStoppingActivities.remove(next); 1635 mStackSupervisor.mGoingToSleepActivities.remove(next); 1636 next.sleeping = false; 1637 mStackSupervisor.mWaitingVisibleActivities.remove(next); 1638 1639 if (DEBUG_SWITCH) Slog.v(TAG, "Resuming " + next); 1640 1641 // If we are currently pausing an activity, then don't do anything 1642 // until that is done. 1643 if (!mStackSupervisor.allPausedActivitiesComplete()) { 1644 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG, 1645 "resumeTopActivityLocked: Skip resume: some activity pausing."); 1646 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1647 return false; 1648 } 1649 1650 // Okay we are now going to start a switch, to 'next'. We may first 1651 // have to pause the current activity, but this is an important point 1652 // where we have decided to go to 'next' so keep track of that. 1653 // XXX "App Redirected" dialog is getting too many false positives 1654 // at this point, so turn off for now. 1655 if (false) { 1656 if (mLastStartedActivity != null && !mLastStartedActivity.finishing) { 1657 long now = SystemClock.uptimeMillis(); 1658 final boolean inTime = mLastStartedActivity.startTime != 0 1659 && (mLastStartedActivity.startTime + START_WARN_TIME) >= now; 1660 final int lastUid = mLastStartedActivity.info.applicationInfo.uid; 1661 final int nextUid = next.info.applicationInfo.uid; 1662 if (inTime && lastUid != nextUid 1663 && lastUid != next.launchedFromUid 1664 && mService.checkPermission( 1665 android.Manifest.permission.STOP_APP_SWITCHES, 1666 -1, next.launchedFromUid) 1667 != PackageManager.PERMISSION_GRANTED) { 1668 mService.showLaunchWarningLocked(mLastStartedActivity, next); 1669 } else { 1670 next.startTime = now; 1671 mLastStartedActivity = next; 1672 } 1673 } else { 1674 next.startTime = SystemClock.uptimeMillis(); 1675 mLastStartedActivity = next; 1676 } 1677 } 1678 1679 mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); 1680 1681 // We need to start pausing the current activity so the top one 1682 // can be resumed... 1683 boolean dontWaitForPause = (next.info.flags&ActivityInfo.FLAG_RESUME_WHILE_PAUSING) != 0; 1684 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 1685 if (mResumedActivity != null) { 1686 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Pausing " + mResumedActivity); 1687 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 1688 } 1689 if (pausing) { 1690 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG, 1691 "resumeTopActivityLocked: Skip resume: need to start pausing"); 1692 // At this point we want to put the upcoming activity's process 1693 // at the top of the LRU list, since we know we will be needing it 1694 // very soon and it would be a waste to let it get killed if it 1695 // happens to be sitting towards the end. 1696 if (next.app != null && next.app.thread != null) { 1697 mService.updateLruProcessLocked(next.app, true, null); 1698 } 1699 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1700 return true; 1701 } 1702 1703 // If the most recent activity was noHistory but was only stopped rather 1704 // than stopped+finished because the device went to sleep, we need to make 1705 // sure to finish it as we're making a new activity topmost. 1706 if (mService.isSleeping() && mLastNoHistoryActivity != null && 1707 !mLastNoHistoryActivity.finishing) { 1708 if (DEBUG_STATES) Slog.d(TAG, "no-history finish of " + mLastNoHistoryActivity + 1709 " on new resume"); 1710 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 1711 null, "resume-no-history", false); 1712 mLastNoHistoryActivity = null; 1713 } 1714 1715 if (prev != null && prev != next) { 1716 if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1717 && next != null && !next.nowVisible) { 1718 mStackSupervisor.mWaitingVisibleActivities.add(prev); 1719 if (DEBUG_SWITCH) Slog.v( 1720 TAG, "Resuming top, waiting visible to hide: " + prev); 1721 } else { 1722 // The next activity is already visible, so hide the previous 1723 // activity's windows right now so we can show the new one ASAP. 1724 // We only do this if the previous is finishing, which should mean 1725 // it is on top of the one being resumed so hiding it quickly 1726 // is good. Otherwise, we want to do the normal route of allowing 1727 // the resumed activity to be shown so we can decide if the 1728 // previous should actually be hidden depending on whether the 1729 // new one is found to be full-screen or not. 1730 if (prev.finishing) { 1731 mWindowManager.setAppVisibility(prev.appToken, false); 1732 if (DEBUG_SWITCH) Slog.v(TAG, "Not waiting for visible to hide: " 1733 + prev + ", waitingVisible=" 1734 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1735 + ", nowVisible=" + next.nowVisible); 1736 } else { 1737 if (DEBUG_SWITCH) Slog.v(TAG, 1738 "Previous already visible but still waiting to hide: " + prev 1739 + ", waitingVisible=" 1740 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 1741 + ", nowVisible=" + next.nowVisible); 1742 } 1743 } 1744 } 1745 1746 // Launching this app's activity, make sure the app is no longer 1747 // considered stopped. 1748 try { 1749 AppGlobals.getPackageManager().setPackageStoppedState( 1750 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 1751 } catch (RemoteException e1) { 1752 } catch (IllegalArgumentException e) { 1753 Slog.w(TAG, "Failed trying to unstop package " 1754 + next.packageName + ": " + e); 1755 } 1756 1757 // We are starting up the next activity, so tell the window manager 1758 // that the previous one will be hidden soon. This way it can know 1759 // to ignore it when computing the desired screen orientation. 1760 boolean anim = true; 1761 if (prev != null) { 1762 if (prev.finishing) { 1763 if (DEBUG_TRANSITION) Slog.v(TAG, 1764 "Prepare close transition: prev=" + prev); 1765 if (mNoAnimActivities.contains(prev)) { 1766 anim = false; 1767 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1768 } else { 1769 mWindowManager.prepareAppTransition(prev.task == next.task 1770 ? AppTransition.TRANSIT_ACTIVITY_CLOSE 1771 : AppTransition.TRANSIT_TASK_CLOSE, false); 1772 } 1773 mWindowManager.setAppWillBeHidden(prev.appToken); 1774 mWindowManager.setAppVisibility(prev.appToken, false); 1775 } else { 1776 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: prev=" + prev); 1777 if (mNoAnimActivities.contains(next)) { 1778 anim = false; 1779 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1780 } else { 1781 mWindowManager.prepareAppTransition(prev.task == next.task 1782 ? AppTransition.TRANSIT_ACTIVITY_OPEN 1783 : next.mLaunchTaskBehind 1784 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 1785 : AppTransition.TRANSIT_TASK_OPEN, false); 1786 } 1787 } 1788 if (false) { 1789 mWindowManager.setAppWillBeHidden(prev.appToken); 1790 mWindowManager.setAppVisibility(prev.appToken, false); 1791 } 1792 } else { 1793 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare open transition: no previous"); 1794 if (mNoAnimActivities.contains(next)) { 1795 anim = false; 1796 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 1797 } else { 1798 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_ACTIVITY_OPEN, false); 1799 } 1800 } 1801 1802 Bundle resumeAnimOptions = null; 1803 if (anim) { 1804 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 1805 if (opts != null) { 1806 resumeAnimOptions = opts.toBundle(); 1807 } 1808 next.applyOptionsLocked(); 1809 } else { 1810 next.clearOptionsLocked(); 1811 } 1812 1813 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1814 if (next.app != null && next.app.thread != null) { 1815 if (DEBUG_SWITCH) Slog.v(TAG, "Resume running: " + next); 1816 1817 // This activity is now becoming visible. 1818 mWindowManager.setAppVisibility(next.appToken, true); 1819 1820 // schedule launch ticks to collect information about slow apps. 1821 next.startLaunchTickingLocked(); 1822 1823 ActivityRecord lastResumedActivity = 1824 lastStack == null ? null :lastStack.mResumedActivity; 1825 ActivityState lastState = next.state; 1826 1827 mService.updateCpuStats(); 1828 1829 if (DEBUG_STATES) Slog.v(TAG, "Moving to RESUMED: " + next + " (in existing)"); 1830 next.state = ActivityState.RESUMED; 1831 mResumedActivity = next; 1832 next.task.touchActiveTime(); 1833 mRecentTasks.addLocked(next.task); 1834 mService.updateLruProcessLocked(next.app, true, null); 1835 updateLRUListLocked(next); 1836 mService.updateOomAdjLocked(); 1837 1838 // Have the window manager re-evaluate the orientation of 1839 // the screen based on the new activity order. 1840 boolean notUpdated = true; 1841 if (mStackSupervisor.isFrontStack(this)) { 1842 Configuration config = mWindowManager.updateOrientationFromAppTokens( 1843 mService.mConfiguration, 1844 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 1845 if (config != null) { 1846 next.frozenBeforeDestroy = true; 1847 } 1848 notUpdated = !mService.updateConfigurationLocked(config, next, false, false); 1849 } 1850 1851 if (notUpdated) { 1852 // The configuration update wasn't able to keep the existing 1853 // instance of the activity, and instead started a new one. 1854 // We should be all done, but let's just make sure our activity 1855 // is still at the top and schedule another run if something 1856 // weird happened. 1857 ActivityRecord nextNext = topRunningActivityLocked(null); 1858 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 1859 "Activity config changed during resume: " + next 1860 + ", new next: " + nextNext); 1861 if (nextNext != next) { 1862 // Do over! 1863 mStackSupervisor.scheduleResumeTopActivities(); 1864 } 1865 if (mStackSupervisor.reportResumedActivityLocked(next)) { 1866 mNoAnimActivities.clear(); 1867 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1868 return true; 1869 } 1870 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1871 return false; 1872 } 1873 1874 try { 1875 // Deliver all pending results. 1876 ArrayList<ResultInfo> a = next.results; 1877 if (a != null) { 1878 final int N = a.size(); 1879 if (!next.finishing && N > 0) { 1880 if (DEBUG_RESULTS) Slog.v( 1881 TAG, "Delivering results to " + next 1882 + ": " + a); 1883 next.app.thread.scheduleSendResult(next.appToken, a); 1884 } 1885 } 1886 1887 if (next.newIntents != null) { 1888 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 1889 } 1890 1891 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, 1892 System.identityHashCode(next), next.task.taskId, next.shortComponentName); 1893 1894 next.sleeping = false; 1895 mService.showAskCompatModeDialogLocked(next); 1896 next.app.pendingUiClean = true; 1897 next.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_TOP); 1898 next.clearOptionsLocked(); 1899 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 1900 mService.isNextTransitionForward(), resumeAnimOptions); 1901 1902 mStackSupervisor.checkReadyForSleepLocked(); 1903 1904 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Resumed " + next); 1905 } catch (Exception e) { 1906 // Whoops, need to restart this activity! 1907 if (DEBUG_STATES) Slog.v(TAG, "Resume failed; resetting state to " 1908 + lastState + ": " + next); 1909 next.state = lastState; 1910 if (lastStack != null) { 1911 lastStack.mResumedActivity = lastResumedActivity; 1912 } 1913 Slog.i(TAG, "Restarting because process died: " + next); 1914 if (!next.hasBeenLaunched) { 1915 next.hasBeenLaunched = true; 1916 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 1917 mStackSupervisor.isFrontStack(lastStack)) { 1918 mWindowManager.setAppStartingWindow( 1919 next.appToken, next.packageName, next.theme, 1920 mService.compatibilityInfoForPackageLocked(next.info.applicationInfo), 1921 next.nonLocalizedLabel, next.labelRes, next.icon, next.logo, 1922 next.windowFlags, null, true); 1923 } 1924 mStackSupervisor.startSpecificActivityLocked(next, true, false); 1925 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1926 return true; 1927 } 1928 1929 // From this point on, if something goes wrong there is no way 1930 // to recover the activity. 1931 try { 1932 next.visible = true; 1933 completeResumeLocked(next); 1934 } catch (Exception e) { 1935 // If any exception gets thrown, toss away this 1936 // activity and try the next one. 1937 Slog.w(TAG, "Exception thrown during resume of " + next, e); 1938 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 1939 "resume-exception", true); 1940 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1941 return true; 1942 } 1943 next.stopped = false; 1944 1945 } else { 1946 // Whoops, need to restart this activity! 1947 if (!next.hasBeenLaunched) { 1948 next.hasBeenLaunched = true; 1949 } else { 1950 if (SHOW_APP_STARTING_PREVIEW) { 1951 mWindowManager.setAppStartingWindow( 1952 next.appToken, next.packageName, next.theme, 1953 mService.compatibilityInfoForPackageLocked( 1954 next.info.applicationInfo), 1955 next.nonLocalizedLabel, 1956 next.labelRes, next.icon, next.logo, next.windowFlags, 1957 null, true); 1958 } 1959 if (DEBUG_SWITCH) Slog.v(TAG, "Restarting: " + next); 1960 } 1961 if (DEBUG_STATES) Slog.d(TAG, "resumeTopActivityLocked: Restarting " + next); 1962 mStackSupervisor.startSpecificActivityLocked(next, true, true); 1963 } 1964 1965 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 1966 return true; 1967 } 1968 1969 private TaskRecord getNextTask(TaskRecord targetTask) { 1970 final int index = mTaskHistory.indexOf(targetTask); 1971 if (index >= 0) { 1972 final int numTasks = mTaskHistory.size(); 1973 for (int i = index + 1; i < numTasks; ++i) { 1974 TaskRecord task = mTaskHistory.get(i); 1975 if (task.userId == targetTask.userId) { 1976 return task; 1977 } 1978 } 1979 } 1980 return null; 1981 } 1982 1983 private void insertTaskAtTop(TaskRecord task) { 1984 // If the moving task is over home stack, transfer its return type to next task 1985 if (task.isOverHomeStack()) { 1986 final TaskRecord nextTask = getNextTask(task); 1987 if (nextTask != null) { 1988 nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); 1989 } 1990 } 1991 1992 // If this is being moved to the top by another activity or being launched from the home 1993 // activity, set mTaskToReturnTo accordingly. 1994 if (isOnHomeDisplay()) { 1995 ActivityStack lastStack = mStackSupervisor.getLastStack(); 1996 final boolean fromHome = lastStack.isHomeStack(); 1997 if (!isHomeStack() && (fromHome || topTask() != task)) { 1998 task.setTaskToReturnTo(fromHome 1999 ? lastStack.topTask() == null 2000 ? HOME_ACTIVITY_TYPE 2001 : lastStack.topTask().taskType 2002 : APPLICATION_ACTIVITY_TYPE); 2003 } 2004 } else { 2005 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 2006 } 2007 2008 mTaskHistory.remove(task); 2009 // Now put task at top. 2010 int taskNdx = mTaskHistory.size(); 2011 if (!isCurrentProfileLocked(task.userId)) { 2012 // Put non-current user tasks below current user tasks. 2013 while (--taskNdx >= 0) { 2014 if (!isCurrentProfileLocked(mTaskHistory.get(taskNdx).userId)) { 2015 break; 2016 } 2017 } 2018 ++taskNdx; 2019 } 2020 mTaskHistory.add(taskNdx, task); 2021 updateTaskMovement(task, true); 2022 } 2023 2024 final void startActivityLocked(ActivityRecord r, boolean newTask, 2025 boolean doResume, boolean keepCurTransition, Bundle options) { 2026 TaskRecord rTask = r.task; 2027 final int taskId = rTask.taskId; 2028 // mLaunchTaskBehind tasks get placed at the back of the task stack. 2029 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 2030 // Last activity in task had been removed or ActivityManagerService is reusing task. 2031 // Insert or replace. 2032 // Might not even be in. 2033 insertTaskAtTop(rTask); 2034 mWindowManager.moveTaskToTop(taskId); 2035 } 2036 TaskRecord task = null; 2037 if (!newTask) { 2038 // If starting in an existing task, find where that is... 2039 boolean startIt = true; 2040 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2041 task = mTaskHistory.get(taskNdx); 2042 if (task.getTopActivity() == null) { 2043 // All activities in task are finishing. 2044 continue; 2045 } 2046 if (task == r.task) { 2047 // Here it is! Now, if this is not yet visible to the 2048 // user, then just add it without starting; it will 2049 // get started when the user navigates back to it. 2050 if (!startIt) { 2051 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 2052 + task, new RuntimeException("here").fillInStackTrace()); 2053 task.addActivityToTop(r); 2054 r.putInHistory(); 2055 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2056 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2057 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, 2058 r.userId, r.info.configChanges, task.voiceSession != null, 2059 r.mLaunchTaskBehind); 2060 if (VALIDATE_TOKENS) { 2061 validateAppTokensLocked(); 2062 } 2063 ActivityOptions.abort(options); 2064 return; 2065 } 2066 break; 2067 } else if (task.numFullscreen > 0) { 2068 startIt = false; 2069 } 2070 } 2071 } 2072 2073 // Place a new activity at top of stack, so it is next to interact 2074 // with the user. 2075 2076 // If we are not placing the new activity frontmost, we do not want 2077 // to deliver the onUserLeaving callback to the actual frontmost 2078 // activity 2079 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2080 mStackSupervisor.mUserLeaving = false; 2081 if (DEBUG_USER_LEAVING) Slog.v(TAG, 2082 "startActivity() behind front, mUserLeaving=false"); 2083 } 2084 2085 task = r.task; 2086 2087 // Slot the activity into the history stack and proceed 2088 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2089 new RuntimeException("here").fillInStackTrace()); 2090 task.addActivityToTop(r); 2091 task.setFrontOfTask(); 2092 2093 r.putInHistory(); 2094 if (!isHomeStack() || numActivities() > 0) { 2095 // We want to show the starting preview window if we are 2096 // switching to a new task, or the next activity's process is 2097 // not currently running. 2098 boolean showStartingIcon = newTask; 2099 ProcessRecord proc = r.app; 2100 if (proc == null) { 2101 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2102 } 2103 if (proc == null || proc.thread == null) { 2104 showStartingIcon = true; 2105 } 2106 if (DEBUG_TRANSITION) Slog.v(TAG, 2107 "Prepare open transition: starting " + r); 2108 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2109 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, keepCurTransition); 2110 mNoAnimActivities.add(r); 2111 } else { 2112 mWindowManager.prepareAppTransition(newTask 2113 ? r.mLaunchTaskBehind 2114 ? AppTransition.TRANSIT_TASK_OPEN_BEHIND 2115 : AppTransition.TRANSIT_TASK_OPEN 2116 : AppTransition.TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2117 mNoAnimActivities.remove(r); 2118 } 2119 mWindowManager.addAppToken(task.mActivities.indexOf(r), 2120 r.appToken, r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2121 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2122 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2123 boolean doShow = true; 2124 if (newTask) { 2125 // Even though this activity is starting fresh, we still need 2126 // to reset it to make sure we apply affinities to move any 2127 // existing activities from other tasks in to it. 2128 // If the caller has requested that the target task be 2129 // reset, then do so. 2130 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2131 resetTaskIfNeededLocked(r, r); 2132 doShow = topRunningNonDelayedActivityLocked(null) == r; 2133 } 2134 } else if (options != null && new ActivityOptions(options).getAnimationType() 2135 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2136 doShow = false; 2137 } 2138 if (r.mLaunchTaskBehind) { 2139 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2140 // tell WindowManager that r is visible even though it is at the back of the stack. 2141 mWindowManager.setAppVisibility(r.appToken, true); 2142 ensureActivitiesVisibleLocked(null, 0); 2143 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2144 // Figure out if we are transitioning from another activity that is 2145 // "has the same starting icon" as the next one. This allows the 2146 // window manager to keep the previous window it had previously 2147 // created, if it still had one. 2148 ActivityRecord prev = mResumedActivity; 2149 if (prev != null) { 2150 // We don't want to reuse the previous starting preview if: 2151 // (1) The current activity is in a different task. 2152 if (prev.task != r.task) { 2153 prev = null; 2154 } 2155 // (2) The current activity is already displayed. 2156 else if (prev.nowVisible) { 2157 prev = null; 2158 } 2159 } 2160 mWindowManager.setAppStartingWindow( 2161 r.appToken, r.packageName, r.theme, 2162 mService.compatibilityInfoForPackageLocked( 2163 r.info.applicationInfo), r.nonLocalizedLabel, 2164 r.labelRes, r.icon, r.logo, r.windowFlags, 2165 prev != null ? prev.appToken : null, showStartingIcon); 2166 r.mStartingWindowShown = true; 2167 } 2168 } else { 2169 // If this is the first activity, don't do any fancy animations, 2170 // because there is nothing for it to animate on top of. 2171 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 2172 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 2173 (r.info.flags & ActivityInfo.FLAG_SHOW_ON_LOCK_SCREEN) != 0, r.userId, 2174 r.info.configChanges, task.voiceSession != null, r.mLaunchTaskBehind); 2175 ActivityOptions.abort(options); 2176 options = null; 2177 } 2178 if (VALIDATE_TOKENS) { 2179 validateAppTokensLocked(); 2180 } 2181 2182 if (doResume) { 2183 mStackSupervisor.resumeTopActivitiesLocked(this, r, options); 2184 } 2185 } 2186 2187 final void validateAppTokensLocked() { 2188 mValidateAppTokens.clear(); 2189 mValidateAppTokens.ensureCapacity(numActivities()); 2190 final int numTasks = mTaskHistory.size(); 2191 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2192 TaskRecord task = mTaskHistory.get(taskNdx); 2193 final ArrayList<ActivityRecord> activities = task.mActivities; 2194 if (activities.isEmpty()) { 2195 continue; 2196 } 2197 TaskGroup group = new TaskGroup(); 2198 group.taskId = task.taskId; 2199 mValidateAppTokens.add(group); 2200 final int numActivities = activities.size(); 2201 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2202 final ActivityRecord r = activities.get(activityNdx); 2203 group.tokens.add(r.appToken); 2204 } 2205 } 2206 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2207 } 2208 2209 /** 2210 * Perform a reset of the given task, if needed as part of launching it. 2211 * Returns the new HistoryRecord at the top of the task. 2212 */ 2213 /** 2214 * Helper method for #resetTaskIfNeededLocked. 2215 * We are inside of the task being reset... we'll either finish this activity, push it out 2216 * for another task, or leave it as-is. 2217 * @param task The task containing the Activity (taskTop) that might be reset. 2218 * @param forceReset 2219 * @return An ActivityOptions that needs to be processed. 2220 */ 2221 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2222 ActivityOptions topOptions = null; 2223 2224 int replyChainEnd = -1; 2225 boolean canMoveOptions = true; 2226 2227 // We only do this for activities that are not the root of the task (since if we finish 2228 // the root, we may no longer have the task!). 2229 final ArrayList<ActivityRecord> activities = task.mActivities; 2230 final int numActivities = activities.size(); 2231 final int rootActivityNdx = task.findEffectiveRootIndex(); 2232 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2233 ActivityRecord target = activities.get(i); 2234 if (target.frontOfTask) 2235 break; 2236 2237 final int flags = target.info.flags; 2238 final boolean finishOnTaskLaunch = 2239 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2240 final boolean allowTaskReparenting = 2241 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2242 final boolean clearWhenTaskReset = 2243 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2244 2245 if (!finishOnTaskLaunch 2246 && !clearWhenTaskReset 2247 && target.resultTo != null) { 2248 // If this activity is sending a reply to a previous 2249 // activity, we can't do anything with it now until 2250 // we reach the start of the reply chain. 2251 // XXX note that we are assuming the result is always 2252 // to the previous activity, which is almost always 2253 // the case but we really shouldn't count on. 2254 if (replyChainEnd < 0) { 2255 replyChainEnd = i; 2256 } 2257 } else if (!finishOnTaskLaunch 2258 && !clearWhenTaskReset 2259 && allowTaskReparenting 2260 && target.taskAffinity != null 2261 && !target.taskAffinity.equals(task.affinity)) { 2262 // If this activity has an affinity for another 2263 // task, then we need to move it out of here. We will 2264 // move it as far out of the way as possible, to the 2265 // bottom of the activity stack. This also keeps it 2266 // correctly ordered with any activities we previously 2267 // moved. 2268 final TaskRecord targetTask; 2269 final ActivityRecord bottom = 2270 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2271 mTaskHistory.get(0).mActivities.get(0) : null; 2272 if (bottom != null && target.taskAffinity != null 2273 && target.taskAffinity.equals(bottom.task.affinity)) { 2274 // If the activity currently at the bottom has the 2275 // same task affinity as the one we are moving, 2276 // then merge it into the same task. 2277 targetTask = bottom.task; 2278 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2279 + " out to bottom task " + bottom.task); 2280 } else { 2281 targetTask = createTaskRecord(mStackSupervisor.getNextTaskId(), target.info, 2282 null, null, null, false); 2283 targetTask.affinityIntent = target.intent; 2284 if (DEBUG_TASKS) Slog.v(TAG, "Start pushing activity " + target 2285 + " out to new task " + target.task); 2286 } 2287 2288 final int targetTaskId = targetTask.taskId; 2289 mWindowManager.setAppTask(target.appToken, targetTaskId); 2290 2291 boolean noOptions = canMoveOptions; 2292 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2293 for (int srcPos = start; srcPos >= i; --srcPos) { 2294 final ActivityRecord p = activities.get(srcPos); 2295 if (p.finishing) { 2296 continue; 2297 } 2298 2299 canMoveOptions = false; 2300 if (noOptions && topOptions == null) { 2301 topOptions = p.takeOptionsLocked(); 2302 if (topOptions != null) { 2303 noOptions = false; 2304 } 2305 } 2306 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing activity " + p + " from task=" 2307 + task + " adding to task=" + targetTask 2308 + " Callers=" + Debug.getCallers(4)); 2309 if (DEBUG_TASKS) Slog.v(TAG, "Pushing next activity " + p 2310 + " out to target's task " + target.task); 2311 p.setTask(targetTask, null); 2312 targetTask.addActivityAtBottom(p); 2313 2314 mWindowManager.setAppTask(p.appToken, targetTaskId); 2315 } 2316 2317 mWindowManager.moveTaskToBottom(targetTaskId); 2318 if (VALIDATE_TOKENS) { 2319 validateAppTokensLocked(); 2320 } 2321 2322 replyChainEnd = -1; 2323 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2324 // If the activity should just be removed -- either 2325 // because it asks for it, or the task should be 2326 // cleared -- then finish it and anything that is 2327 // part of its reply chain. 2328 int end; 2329 if (clearWhenTaskReset) { 2330 // In this case, we want to finish this activity 2331 // and everything above it, so be sneaky and pretend 2332 // like these are all in the reply chain. 2333 end = activities.size() - 1; 2334 } else if (replyChainEnd < 0) { 2335 end = i; 2336 } else { 2337 end = replyChainEnd; 2338 } 2339 boolean noOptions = canMoveOptions; 2340 for (int srcPos = i; srcPos <= end; srcPos++) { 2341 ActivityRecord p = activities.get(srcPos); 2342 if (p.finishing) { 2343 continue; 2344 } 2345 canMoveOptions = false; 2346 if (noOptions && topOptions == null) { 2347 topOptions = p.takeOptionsLocked(); 2348 if (topOptions != null) { 2349 noOptions = false; 2350 } 2351 } 2352 if (DEBUG_TASKS) Slog.w(TAG, 2353 "resetTaskIntendedTask: calling finishActivity on " + p); 2354 if (finishActivityLocked( 2355 p, Activity.RESULT_CANCELED, null, "reset-task", false)) { 2356 end--; 2357 srcPos--; 2358 } 2359 } 2360 replyChainEnd = -1; 2361 } else { 2362 // If we were in the middle of a chain, well the 2363 // activity that started it all doesn't want anything 2364 // special, so leave it all as-is. 2365 replyChainEnd = -1; 2366 } 2367 } 2368 2369 return topOptions; 2370 } 2371 2372 /** 2373 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2374 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2375 * @param affinityTask The task we are looking for an affinity to. 2376 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2377 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2378 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2379 */ 2380 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2381 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2382 int replyChainEnd = -1; 2383 final int taskId = task.taskId; 2384 final String taskAffinity = task.affinity; 2385 2386 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2387 final int numActivities = activities.size(); 2388 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2389 2390 // Do not operate on or below the effective root Activity. 2391 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2392 ActivityRecord target = activities.get(i); 2393 if (target.frontOfTask) 2394 break; 2395 2396 final int flags = target.info.flags; 2397 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2398 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2399 2400 if (target.resultTo != null) { 2401 // If this activity is sending a reply to a previous 2402 // activity, we can't do anything with it now until 2403 // we reach the start of the reply chain. 2404 // XXX note that we are assuming the result is always 2405 // to the previous activity, which is almost always 2406 // the case but we really shouldn't count on. 2407 if (replyChainEnd < 0) { 2408 replyChainEnd = i; 2409 } 2410 } else if (topTaskIsHigher 2411 && allowTaskReparenting 2412 && taskAffinity != null 2413 && taskAffinity.equals(target.taskAffinity)) { 2414 // This activity has an affinity for our task. Either remove it if we are 2415 // clearing or move it over to our task. Note that 2416 // we currently punt on the case where we are resetting a 2417 // task that is not at the top but who has activities above 2418 // with an affinity to it... this is really not a normal 2419 // case, and we will need to later pull that task to the front 2420 // and usually at that point we will do the reset and pick 2421 // up those remaining activities. (This only happens if 2422 // someone starts an activity in a new task from an activity 2423 // in a task that is not currently on top.) 2424 if (forceReset || finishOnTaskLaunch) { 2425 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2426 if (DEBUG_TASKS) Slog.v(TAG, "Finishing task at index " + start + " to " + i); 2427 for (int srcPos = start; srcPos >= i; --srcPos) { 2428 final ActivityRecord p = activities.get(srcPos); 2429 if (p.finishing) { 2430 continue; 2431 } 2432 finishActivityLocked( 2433 p, Activity.RESULT_CANCELED, null, "move-affinity", false); 2434 } 2435 } else { 2436 if (taskInsertionPoint < 0) { 2437 taskInsertionPoint = task.mActivities.size(); 2438 2439 } 2440 2441 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2442 if (DEBUG_TASKS) Slog.v(TAG, "Reparenting from task=" + affinityTask + ":" 2443 + start + "-" + i + " to task=" + task + ":" + taskInsertionPoint); 2444 for (int srcPos = start; srcPos >= i; --srcPos) { 2445 final ActivityRecord p = activities.get(srcPos); 2446 p.setTask(task, null); 2447 task.addActivityAtIndex(taskInsertionPoint, p); 2448 2449 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Removing and adding activity " + p 2450 + " to stack at " + task, 2451 new RuntimeException("here").fillInStackTrace()); 2452 if (DEBUG_TASKS) Slog.v(TAG, "Pulling activity " + p + " from " + srcPos 2453 + " in to resetting task " + task); 2454 mWindowManager.setAppTask(p.appToken, taskId); 2455 } 2456 mWindowManager.moveTaskToTop(taskId); 2457 if (VALIDATE_TOKENS) { 2458 validateAppTokensLocked(); 2459 } 2460 2461 // Now we've moved it in to place... but what if this is 2462 // a singleTop activity and we have put it on top of another 2463 // instance of the same activity? Then we drop the instance 2464 // below so it remains singleTop. 2465 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 2466 ArrayList<ActivityRecord> taskActivities = task.mActivities; 2467 int targetNdx = taskActivities.indexOf(target); 2468 if (targetNdx > 0) { 2469 ActivityRecord p = taskActivities.get(targetNdx - 1); 2470 if (p.intent.getComponent().equals(target.intent.getComponent())) { 2471 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 2472 false); 2473 } 2474 } 2475 } 2476 } 2477 2478 replyChainEnd = -1; 2479 } 2480 } 2481 return taskInsertionPoint; 2482 } 2483 2484 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 2485 ActivityRecord newActivity) { 2486 boolean forceReset = 2487 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 2488 if (ACTIVITY_INACTIVE_RESET_TIME > 0 2489 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 2490 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 2491 forceReset = true; 2492 } 2493 } 2494 2495 final TaskRecord task = taskTop.task; 2496 2497 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 2498 * for remaining tasks. Used for later tasks to reparent to task. */ 2499 boolean taskFound = false; 2500 2501 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 2502 ActivityOptions topOptions = null; 2503 2504 // Preserve the location for reparenting in the new task. 2505 int reparentInsertionPoint = -1; 2506 2507 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 2508 final TaskRecord targetTask = mTaskHistory.get(i); 2509 2510 if (targetTask == task) { 2511 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 2512 taskFound = true; 2513 } else { 2514 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 2515 taskFound, forceReset, reparentInsertionPoint); 2516 } 2517 } 2518 2519 int taskNdx = mTaskHistory.indexOf(task); 2520 if (taskNdx >= 0) { 2521 do { 2522 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 2523 } while (taskTop == null && taskNdx >= 0); 2524 } 2525 2526 if (topOptions != null) { 2527 // If we got some ActivityOptions from an activity on top that 2528 // was removed from the task, propagate them to the new real top. 2529 if (taskTop != null) { 2530 taskTop.updateOptionsLocked(topOptions); 2531 } else { 2532 topOptions.abort(); 2533 } 2534 } 2535 2536 return taskTop; 2537 } 2538 2539 void sendActivityResultLocked(int callingUid, ActivityRecord r, 2540 String resultWho, int requestCode, int resultCode, Intent data) { 2541 2542 if (callingUid > 0) { 2543 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 2544 data, r.getUriPermissionsLocked(), r.userId); 2545 } 2546 2547 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 2548 + " : who=" + resultWho + " req=" + requestCode 2549 + " res=" + resultCode + " data=" + data); 2550 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 2551 try { 2552 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 2553 list.add(new ResultInfo(resultWho, requestCode, 2554 resultCode, data)); 2555 r.app.thread.scheduleSendResult(r.appToken, list); 2556 return; 2557 } catch (Exception e) { 2558 Slog.w(TAG, "Exception thrown sending result to " + r, e); 2559 } 2560 } 2561 2562 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 2563 } 2564 2565 private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { 2566 if (mStackSupervisor.isFrontStack(this) && mService.mFocusedActivity == r) { 2567 ActivityRecord next = topRunningActivityLocked(null); 2568 final String myReason = reason + " adjustFocus"; 2569 if (next != r) { 2570 final TaskRecord task = r.task; 2571 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 2572 // For non-fullscreen stack, we want to move the focus to the next visible 2573 // stack to prevent the home screen from moving to the top and obscuring 2574 // other visible stacks. 2575 if (!mFullscreen 2576 && adjustFocusToNextVisibleStackLocked(null, myReason)) { 2577 return; 2578 } 2579 // Move the home stack to the top if this stack is fullscreen or there is no 2580 // other visible stack. 2581 if (mStackSupervisor.moveHomeStackTaskToTop( 2582 task.getTaskToReturnTo(), myReason)) { 2583 // Activity focus was already adjusted. Nothing else to do... 2584 return; 2585 } 2586 } 2587 } 2588 2589 final ActivityRecord top = mStackSupervisor.topRunningActivityLocked(); 2590 if (top != null) { 2591 mService.setFocusedActivityLocked(top, myReason); 2592 } 2593 } 2594 } 2595 2596 private boolean adjustFocusToNextVisibleStackLocked(ActivityStack inStack, String reason) { 2597 final ActivityStack stack = (inStack != null) ? inStack : getNextVisibleStackLocked(); 2598 final String myReason = reason + " adjustFocusToNextVisibleStack"; 2599 if (stack == null) { 2600 return false; 2601 } 2602 final ActivityRecord top = stack.topRunningActivityLocked(null); 2603 if (top == null) { 2604 return false; 2605 } 2606 mService.setFocusedActivityLocked(top, myReason); 2607 return true; 2608 } 2609 2610 final void stopActivityLocked(ActivityRecord r) { 2611 if (DEBUG_SWITCH) Slog.d(TAG, "Stopping: " + r); 2612 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 2613 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 2614 if (!r.finishing) { 2615 if (!mService.isSleeping()) { 2616 if (DEBUG_STATES) { 2617 Slog.d(TAG, "no-history finish of " + r); 2618 } 2619 requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 2620 "stop-no-history", false); 2621 } else { 2622 if (DEBUG_STATES) Slog.d(TAG, "Not finishing noHistory " + r 2623 + " on stop because we're just sleeping"); 2624 } 2625 } 2626 } 2627 2628 if (r.app != null && r.app.thread != null) { 2629 adjustFocusedActivityLocked(r, "stopActivity"); 2630 r.resumeKeyDispatchingLocked(); 2631 try { 2632 r.stopped = false; 2633 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2634 + " (stop requested)"); 2635 r.state = ActivityState.STOPPING; 2636 if (DEBUG_VISBILITY) Slog.v( 2637 TAG, "Stopping visible=" + r.visible + " for " + r); 2638 if (!r.visible) { 2639 mWindowManager.setAppVisibility(r.appToken, false); 2640 } 2641 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 2642 if (mService.isSleepingOrShuttingDown()) { 2643 r.setSleeping(true); 2644 } 2645 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 2646 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 2647 } catch (Exception e) { 2648 // Maybe just ignore exceptions here... if the process 2649 // has crashed, our death notification will clean things 2650 // up. 2651 Slog.w(TAG, "Exception thrown during pause", e); 2652 // Just in case, assume it to be stopped. 2653 r.stopped = true; 2654 if (DEBUG_STATES) Slog.v(TAG, "Stop failed; moving to STOPPED: " + r); 2655 r.state = ActivityState.STOPPED; 2656 if (r.configDestroy) { 2657 destroyActivityLocked(r, true, "stop-except"); 2658 } 2659 } 2660 } 2661 } 2662 2663 /** 2664 * @return Returns true if the activity is being finished, false if for 2665 * some reason it is being left as-is. 2666 */ 2667 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 2668 Intent resultData, String reason, boolean oomAdj) { 2669 ActivityRecord r = isInStackLocked(token); 2670 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v( 2671 TAG, "Finishing activity token=" + token + " r=" 2672 + ", result=" + resultCode + ", data=" + resultData 2673 + ", reason=" + reason); 2674 if (r == null) { 2675 return false; 2676 } 2677 2678 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 2679 return true; 2680 } 2681 2682 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 2683 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2684 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2685 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2686 ActivityRecord r = activities.get(activityNdx); 2687 if (r.resultTo == self && r.requestCode == requestCode) { 2688 if ((r.resultWho == null && resultWho == null) || 2689 (r.resultWho != null && r.resultWho.equals(resultWho))) { 2690 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 2691 false); 2692 } 2693 } 2694 } 2695 } 2696 mService.updateOomAdjLocked(); 2697 } 2698 2699 final void finishTopRunningActivityLocked(ProcessRecord app, String reason) { 2700 ActivityRecord r = topRunningActivityLocked(null); 2701 if (r != null && r.app == app) { 2702 // If the top running activity is from this crashing 2703 // process, then terminate it to avoid getting in a loop. 2704 Slog.w(TAG, " Force finishing activity " 2705 + r.intent.getComponent().flattenToShortString()); 2706 int taskNdx = mTaskHistory.indexOf(r.task); 2707 int activityNdx = r.task.mActivities.indexOf(r); 2708 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 2709 // Also terminate any activities below it that aren't yet 2710 // stopped, to avoid a situation where one will get 2711 // re-start our crashing activity once it gets resumed again. 2712 --activityNdx; 2713 if (activityNdx < 0) { 2714 do { 2715 --taskNdx; 2716 if (taskNdx < 0) { 2717 break; 2718 } 2719 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 2720 } while (activityNdx < 0); 2721 } 2722 if (activityNdx >= 0) { 2723 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 2724 if (r.state == ActivityState.RESUMED 2725 || r.state == ActivityState.PAUSING 2726 || r.state == ActivityState.PAUSED) { 2727 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 2728 Slog.w(TAG, " Force finishing activity " 2729 + r.intent.getComponent().flattenToShortString()); 2730 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 2731 } 2732 } 2733 } 2734 } 2735 } 2736 2737 final void finishVoiceTask(IVoiceInteractionSession session) { 2738 IBinder sessionBinder = session.asBinder(); 2739 boolean didOne = false; 2740 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2741 TaskRecord tr = mTaskHistory.get(taskNdx); 2742 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 2743 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 2744 ActivityRecord r = tr.mActivities.get(activityNdx); 2745 if (!r.finishing) { 2746 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 2747 false); 2748 didOne = true; 2749 } 2750 } 2751 } 2752 } 2753 if (didOne) { 2754 mService.updateOomAdjLocked(); 2755 } 2756 } 2757 2758 final boolean finishActivityAffinityLocked(ActivityRecord r) { 2759 ArrayList<ActivityRecord> activities = r.task.mActivities; 2760 for (int index = activities.indexOf(r); index >= 0; --index) { 2761 ActivityRecord cur = activities.get(index); 2762 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 2763 break; 2764 } 2765 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 2766 } 2767 return true; 2768 } 2769 2770 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 2771 // send the result 2772 ActivityRecord resultTo = r.resultTo; 2773 if (resultTo != null) { 2774 if (DEBUG_RESULTS) Slog.v(TAG, "Adding result to " + resultTo 2775 + " who=" + r.resultWho + " req=" + r.requestCode 2776 + " res=" + resultCode + " data=" + resultData); 2777 if (resultTo.userId != r.userId) { 2778 if (resultData != null) { 2779 resultData.setContentUserHint(r.userId); 2780 } 2781 } 2782 if (r.info.applicationInfo.uid > 0) { 2783 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 2784 resultTo.packageName, resultData, 2785 resultTo.getUriPermissionsLocked(), resultTo.userId); 2786 } 2787 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 2788 resultData); 2789 r.resultTo = null; 2790 } 2791 else if (DEBUG_RESULTS) Slog.v(TAG, "No result destination from " + r); 2792 2793 // Make sure this HistoryRecord is not holding on to other resources, 2794 // because clients have remote IPC references to this object so we 2795 // can't assume that will go away and want to avoid circular IPC refs. 2796 r.results = null; 2797 r.pendingResults = null; 2798 r.newIntents = null; 2799 r.icicle = null; 2800 } 2801 2802 /** 2803 * @return Returns true if this activity has been removed from the history 2804 * list, or false if it is still in the list and will be removed later. 2805 */ 2806 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 2807 String reason, boolean oomAdj) { 2808 if (r.finishing) { 2809 Slog.w(TAG, "Duplicate finish request for " + r); 2810 return false; 2811 } 2812 2813 r.makeFinishingLocked(); 2814 final TaskRecord task = r.task; 2815 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 2816 r.userId, System.identityHashCode(r), 2817 task.taskId, r.shortComponentName, reason); 2818 final ArrayList<ActivityRecord> activities = task.mActivities; 2819 final int index = activities.indexOf(r); 2820 if (index < (activities.size() - 1)) { 2821 task.setFrontOfTask(); 2822 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 2823 // If the caller asked that this activity (and all above it) 2824 // be cleared when the task is reset, don't lose that information, 2825 // but propagate it up to the next activity. 2826 ActivityRecord next = activities.get(index+1); 2827 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 2828 } 2829 } 2830 2831 r.pauseKeyDispatchingLocked(); 2832 2833 adjustFocusedActivityLocked(r, "finishActivity"); 2834 2835 finishActivityResultsLocked(r, resultCode, resultData); 2836 2837 if (mResumedActivity == r) { 2838 boolean endTask = index <= 0; 2839 if (DEBUG_VISBILITY || DEBUG_TRANSITION) Slog.v(TAG, 2840 "Prepare close transition: finishing " + r); 2841 mWindowManager.prepareAppTransition(endTask 2842 ? AppTransition.TRANSIT_TASK_CLOSE 2843 : AppTransition.TRANSIT_ACTIVITY_CLOSE, false); 2844 2845 // Tell window manager to prepare for this one to be removed. 2846 mWindowManager.setAppVisibility(r.appToken, false); 2847 2848 if (mPausingActivity == null) { 2849 if (DEBUG_PAUSE) Slog.v(TAG, "Finish needs to pause: " + r); 2850 if (DEBUG_USER_LEAVING) Slog.v(TAG, "finish() => pause with userLeaving=false"); 2851 startPausingLocked(false, false, false, false); 2852 } 2853 2854 if (endTask) { 2855 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 2856 } 2857 } else if (r.state != ActivityState.PAUSING) { 2858 // If the activity is PAUSING, we will complete the finish once 2859 // it is done pausing; else we can just directly finish it here. 2860 if (DEBUG_PAUSE) Slog.v(TAG, "Finish not pausing: " + r); 2861 return finishCurrentActivityLocked(r, FINISH_AFTER_PAUSE, oomAdj) == null; 2862 } else { 2863 if (DEBUG_PAUSE) Slog.v(TAG, "Finish waiting for pause of: " + r); 2864 } 2865 2866 return false; 2867 } 2868 2869 static final int FINISH_IMMEDIATELY = 0; 2870 static final int FINISH_AFTER_PAUSE = 1; 2871 static final int FINISH_AFTER_VISIBLE = 2; 2872 2873 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 2874 // First things first: if this activity is currently visible, 2875 // and the resumed activity is not yet visible, then hold off on 2876 // finishing until the resumed one becomes visible. 2877 if (mode == FINISH_AFTER_VISIBLE && r.nowVisible) { 2878 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 2879 mStackSupervisor.mStoppingActivities.add(r); 2880 if (mStackSupervisor.mStoppingActivities.size() > 3 2881 || r.frontOfTask && mTaskHistory.size() <= 1) { 2882 // If we already have a few activities waiting to stop, 2883 // then give up on things going idle and start clearing 2884 // them out. Or if r is the last of activity of the last task the stack 2885 // will be empty and must be cleared immediately. 2886 mStackSupervisor.scheduleIdleLocked(); 2887 } else { 2888 mStackSupervisor.checkReadyForSleepLocked(); 2889 } 2890 } 2891 if (DEBUG_STATES) Slog.v(TAG, "Moving to STOPPING: " + r 2892 + " (finish requested)"); 2893 r.state = ActivityState.STOPPING; 2894 if (oomAdj) { 2895 mService.updateOomAdjLocked(); 2896 } 2897 return r; 2898 } 2899 2900 // make sure the record is cleaned out of other places. 2901 mStackSupervisor.mStoppingActivities.remove(r); 2902 mStackSupervisor.mGoingToSleepActivities.remove(r); 2903 mStackSupervisor.mWaitingVisibleActivities.remove(r); 2904 if (mResumedActivity == r) { 2905 mResumedActivity = null; 2906 } 2907 final ActivityState prevState = r.state; 2908 if (DEBUG_STATES) Slog.v(TAG, "Moving to FINISHING: " + r); 2909 r.state = ActivityState.FINISHING; 2910 2911 if (mode == FINISH_IMMEDIATELY 2912 || prevState == ActivityState.STOPPED 2913 || prevState == ActivityState.INITIALIZING) { 2914 // If this activity is already stopped, we can just finish 2915 // it right now. 2916 r.makeFinishingLocked(); 2917 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 2918 if (activityRemoved) { 2919 mStackSupervisor.resumeTopActivitiesLocked(); 2920 } 2921 if (DEBUG_CONTAINERS) Slog.d(TAG, 2922 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 2923 " destroy returned removed=" + activityRemoved); 2924 return activityRemoved ? null : r; 2925 } 2926 2927 // Need to go through the full pause cycle to get this 2928 // activity into the stopped state and then finish it. 2929 if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); 2930 mStackSupervisor.mFinishingActivities.add(r); 2931 r.resumeKeyDispatchingLocked(); 2932 mStackSupervisor.getFocusedStack().resumeTopActivityLocked(null); 2933 return r; 2934 } 2935 2936 void finishAllActivitiesLocked(boolean immediately) { 2937 boolean noActivitiesInStack = true; 2938 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2939 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2940 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2941 final ActivityRecord r = activities.get(activityNdx); 2942 noActivitiesInStack = false; 2943 if (r.finishing && !immediately) { 2944 continue; 2945 } 2946 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 2947 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 2948 } 2949 } 2950 if (noActivitiesInStack) { 2951 mActivityContainer.onTaskListEmptyLocked(); 2952 } 2953 } 2954 2955 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 2956 // Basic case: for simple app-centric recents, we need to recreate 2957 // the task if the affinity has changed. 2958 if (srec == null || srec.task.affinity == null || 2959 !srec.task.affinity.equals(destAffinity)) { 2960 return true; 2961 } 2962 // Document-centric case: an app may be split in to multiple documents; 2963 // they need to re-create their task if this current activity is the root 2964 // of a document, unless simply finishing it will return them to the the 2965 // correct app behind. 2966 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 2967 && srec.task.getBaseIntent().isDocument()) { 2968 // Okay, this activity is at the root of its task. What to do, what to do... 2969 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 2970 // Finishing won't return to an application, so we need to recreate. 2971 return true; 2972 } 2973 // We now need to get the task below it to determine what to do. 2974 int taskIdx = mTaskHistory.indexOf(srec.task); 2975 if (taskIdx <= 0) { 2976 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 2977 return false; 2978 } 2979 if (taskIdx == 0) { 2980 // At the bottom of the stack, nothing to go back to. 2981 return true; 2982 } 2983 TaskRecord prevTask = mTaskHistory.get(taskIdx); 2984 if (!srec.task.affinity.equals(prevTask.affinity)) { 2985 // These are different apps, so need to recreate. 2986 return true; 2987 } 2988 } 2989 return false; 2990 } 2991 2992 final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, 2993 Intent resultData) { 2994 final TaskRecord task = srec.task; 2995 final ArrayList<ActivityRecord> activities = task.mActivities; 2996 final int start = activities.indexOf(srec); 2997 if (!mTaskHistory.contains(task) || (start < 0)) { 2998 return false; 2999 } 3000 int finishTo = start - 1; 3001 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 3002 boolean foundParentInTask = false; 3003 final ComponentName dest = destIntent.getComponent(); 3004 if (start > 0 && dest != null) { 3005 for (int i = finishTo; i >= 0; i--) { 3006 ActivityRecord r = activities.get(i); 3007 if (r.info.packageName.equals(dest.getPackageName()) && 3008 r.info.name.equals(dest.getClassName())) { 3009 finishTo = i; 3010 parent = r; 3011 foundParentInTask = true; 3012 break; 3013 } 3014 } 3015 } 3016 3017 IActivityController controller = mService.mController; 3018 if (controller != null) { 3019 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 3020 if (next != null) { 3021 // ask watcher if this is allowed 3022 boolean resumeOK = true; 3023 try { 3024 resumeOK = controller.activityResuming(next.packageName); 3025 } catch (RemoteException e) { 3026 mService.mController = null; 3027 Watchdog.getInstance().setActivityController(null); 3028 } 3029 3030 if (!resumeOK) { 3031 return false; 3032 } 3033 } 3034 } 3035 final long origId = Binder.clearCallingIdentity(); 3036 for (int i = start; i > finishTo; i--) { 3037 ActivityRecord r = activities.get(i); 3038 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 3039 // Only return the supplied result for the first activity finished 3040 resultCode = Activity.RESULT_CANCELED; 3041 resultData = null; 3042 } 3043 3044 if (parent != null && foundParentInTask) { 3045 final int parentLaunchMode = parent.info.launchMode; 3046 final int destIntentFlags = destIntent.getFlags(); 3047 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 3048 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 3049 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 3050 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 3051 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 3052 srec.packageName); 3053 } else { 3054 try { 3055 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 3056 destIntent.getComponent(), 0, srec.userId); 3057 int res = mStackSupervisor.startActivityLocked(srec.app.thread, destIntent, 3058 null, aInfo, null, null, parent.appToken, null, 3059 0, -1, parent.launchedFromUid, parent.launchedFromPackage, 3060 -1, parent.launchedFromUid, 0, null, true, null, null, null); 3061 foundParentInTask = res == ActivityManager.START_SUCCESS; 3062 } catch (RemoteException e) { 3063 foundParentInTask = false; 3064 } 3065 requestFinishActivityLocked(parent.appToken, resultCode, 3066 resultData, "navigate-top", true); 3067 } 3068 } 3069 Binder.restoreCallingIdentity(origId); 3070 return foundParentInTask; 3071 } 3072 /** 3073 * Perform the common clean-up of an activity record. This is called both 3074 * as part of destroyActivityLocked() (when destroying the client-side 3075 * representation) and cleaning things up as a result of its hosting 3076 * processing going away, in which case there is no remaining client-side 3077 * state to destroy so only the cleanup here is needed. 3078 * 3079 * Note: Call before #removeActivityFromHistoryLocked. 3080 */ 3081 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 3082 boolean setState) { 3083 if (mResumedActivity == r) { 3084 mResumedActivity = null; 3085 } 3086 if (mPausingActivity == r) { 3087 mPausingActivity = null; 3088 } 3089 mService.clearFocusedActivity(r); 3090 3091 r.configDestroy = false; 3092 r.frozenBeforeDestroy = false; 3093 3094 if (setState) { 3095 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (cleaning up)"); 3096 r.state = ActivityState.DESTROYED; 3097 if (DEBUG_APP) Slog.v(TAG, "Clearing app during cleanUp for activity " + r); 3098 r.app = null; 3099 } 3100 3101 // Make sure this record is no longer in the pending finishes list. 3102 // This could happen, for example, if we are trimming activities 3103 // down to the max limit while they are still waiting to finish. 3104 mStackSupervisor.mFinishingActivities.remove(r); 3105 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3106 3107 // Remove any pending results. 3108 if (r.finishing && r.pendingResults != null) { 3109 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3110 PendingIntentRecord rec = apr.get(); 3111 if (rec != null) { 3112 mService.cancelIntentSenderLocked(rec, false); 3113 } 3114 } 3115 r.pendingResults = null; 3116 } 3117 3118 if (cleanServices) { 3119 cleanUpActivityServicesLocked(r); 3120 } 3121 3122 // Get rid of any pending idle timeouts. 3123 removeTimeoutsForActivityLocked(r); 3124 if (getVisibleBehindActivity() == r) { 3125 mStackSupervisor.requestVisibleBehindLocked(r, false); 3126 } 3127 } 3128 3129 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3130 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3131 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3132 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3133 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3134 r.finishLaunchTickingLocked(); 3135 } 3136 3137 private void removeActivityFromHistoryLocked(ActivityRecord r, String reason) { 3138 mStackSupervisor.removeChildActivityContainers(r); 3139 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3140 r.makeFinishingLocked(); 3141 if (DEBUG_ADD_REMOVE) { 3142 RuntimeException here = new RuntimeException("here"); 3143 here.fillInStackTrace(); 3144 Slog.i(TAG, "Removing activity " + r + " from stack"); 3145 } 3146 r.takeFromHistory(); 3147 removeTimeoutsForActivityLocked(r); 3148 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (removed from history)"); 3149 r.state = ActivityState.DESTROYED; 3150 if (DEBUG_APP) Slog.v(TAG, "Clearing app during remove for activity " + r); 3151 r.app = null; 3152 mWindowManager.removeAppToken(r.appToken); 3153 if (VALIDATE_TOKENS) { 3154 validateAppTokensLocked(); 3155 } 3156 final TaskRecord task = r.task; 3157 if (task != null && task.removeActivity(r)) { 3158 if (DEBUG_STACK) Slog.i(TAG, 3159 "removeActivityFromHistoryLocked: last activity removed from " + this); 3160 if (mStackSupervisor.isFrontStack(this) && task == topTask() && 3161 task.isOverHomeStack()) { 3162 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); 3163 } 3164 removeTask(task, reason); 3165 } 3166 cleanUpActivityServicesLocked(r); 3167 r.removeUriPermissionsLocked(); 3168 } 3169 3170 /** 3171 * Perform clean-up of service connections in an activity record. 3172 */ 3173 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3174 // Throw away any services that have been bound by this activity. 3175 if (r.connections != null) { 3176 Iterator<ConnectionRecord> it = r.connections.iterator(); 3177 while (it.hasNext()) { 3178 ConnectionRecord c = it.next(); 3179 mService.mServices.removeConnectionLocked(c, null, r); 3180 } 3181 r.connections = null; 3182 } 3183 } 3184 3185 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3186 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3187 msg.obj = new ScheduleDestroyArgs(owner, reason); 3188 mHandler.sendMessage(msg); 3189 } 3190 3191 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3192 boolean lastIsOpaque = false; 3193 boolean activityRemoved = false; 3194 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3195 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3196 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3197 final ActivityRecord r = activities.get(activityNdx); 3198 if (r.finishing) { 3199 continue; 3200 } 3201 if (r.fullscreen) { 3202 lastIsOpaque = true; 3203 } 3204 if (owner != null && r.app != owner) { 3205 continue; 3206 } 3207 if (!lastIsOpaque) { 3208 continue; 3209 } 3210 if (r.isDestroyable()) { 3211 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3212 + " resumed=" + mResumedActivity 3213 + " pausing=" + mPausingActivity + " for reason " + reason); 3214 if (destroyActivityLocked(r, true, reason)) { 3215 activityRemoved = true; 3216 } 3217 } 3218 } 3219 } 3220 if (activityRemoved) { 3221 mStackSupervisor.resumeTopActivitiesLocked(); 3222 } 3223 } 3224 3225 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3226 if (r.isDestroyable()) { 3227 if (DEBUG_SWITCH) Slog.v(TAG, "Destroying " + r + " in state " + r.state 3228 + " resumed=" + mResumedActivity 3229 + " pausing=" + mPausingActivity + " for reason " + reason); 3230 return destroyActivityLocked(r, true, reason); 3231 } 3232 return false; 3233 } 3234 3235 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3236 String reason) { 3237 // Iterate over tasks starting at the back (oldest) first. 3238 if (DEBUG_RELEASE) Slog.d(TAG, "Trying to release some activities in " + app); 3239 int maxTasks = tasks.size() / 4; 3240 if (maxTasks < 1) { 3241 maxTasks = 1; 3242 } 3243 int numReleased = 0; 3244 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3245 final TaskRecord task = mTaskHistory.get(taskNdx); 3246 if (!tasks.contains(task)) { 3247 continue; 3248 } 3249 if (DEBUG_RELEASE) Slog.d(TAG, "Looking for activities to release in " + task); 3250 int curNum = 0; 3251 final ArrayList<ActivityRecord> activities = task.mActivities; 3252 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3253 final ActivityRecord activity = activities.get(actNdx); 3254 if (activity.app == app && activity.isDestroyable()) { 3255 if (DEBUG_RELEASE) Slog.v(TAG, "Destroying " + activity 3256 + " in state " + activity.state + " resumed=" + mResumedActivity 3257 + " pausing=" + mPausingActivity + " for reason " + reason); 3258 destroyActivityLocked(activity, true, reason); 3259 if (activities.get(actNdx) != activity) { 3260 // Was removed from list, back up so we don't miss the next one. 3261 actNdx--; 3262 } 3263 curNum++; 3264 } 3265 } 3266 if (curNum > 0) { 3267 numReleased += curNum; 3268 maxTasks--; 3269 if (mTaskHistory.get(taskNdx) != task) { 3270 // The entire task got removed, back up so we don't miss the next one. 3271 taskNdx--; 3272 } 3273 } 3274 } 3275 if (DEBUG_RELEASE) Slog.d(TAG, "Done releasing: did " + numReleased + " activities"); 3276 return numReleased; 3277 } 3278 3279 /** 3280 * Destroy the current CLIENT SIDE instance of an activity. This may be 3281 * called both when actually finishing an activity, or when performing 3282 * a configuration switch where we destroy the current client-side object 3283 * but then create a new client-side object for this same HistoryRecord. 3284 */ 3285 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3286 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v( 3287 TAG, "Removing activity from " + reason + ": token=" + r 3288 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3289 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3290 r.userId, System.identityHashCode(r), 3291 r.task.taskId, r.shortComponentName, reason); 3292 3293 boolean removedFromHistory = false; 3294 3295 cleanUpActivityLocked(r, false, false); 3296 3297 final boolean hadApp = r.app != null; 3298 3299 if (hadApp) { 3300 if (removeFromApp) { 3301 r.app.activities.remove(r); 3302 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3303 mService.mHeavyWeightProcess = null; 3304 mService.mHandler.sendEmptyMessage( 3305 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3306 } 3307 if (r.app.activities.isEmpty()) { 3308 // Update any services we are bound to that might care about whether 3309 // their client may have activities. 3310 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3311 // No longer have activities, so update LRU list and oom adj. 3312 mService.updateLruProcessLocked(r.app, false, null); 3313 mService.updateOomAdjLocked(); 3314 } 3315 } 3316 3317 boolean skipDestroy = false; 3318 3319 try { 3320 if (DEBUG_SWITCH) Slog.i(TAG, "Destroying: " + r); 3321 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3322 r.configChangeFlags); 3323 } catch (Exception e) { 3324 // We can just ignore exceptions here... if the process 3325 // has crashed, our death notification will clean things 3326 // up. 3327 //Slog.w(TAG, "Exception thrown during finish", e); 3328 if (r.finishing) { 3329 removeActivityFromHistoryLocked(r, reason + " exceptionInScheduleDestroy"); 3330 removedFromHistory = true; 3331 skipDestroy = true; 3332 } 3333 } 3334 3335 r.nowVisible = false; 3336 3337 // If the activity is finishing, we need to wait on removing it 3338 // from the list to give it a chance to do its cleanup. During 3339 // that time it may make calls back with its token so we need to 3340 // be able to find it on the list and so we don't want to remove 3341 // it from the list yet. Otherwise, we can just immediately put 3342 // it in the destroyed state since we are not removing it from the 3343 // list. 3344 if (r.finishing && !skipDestroy) { 3345 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYING: " + r 3346 + " (destroy requested)"); 3347 r.state = ActivityState.DESTROYING; 3348 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3349 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3350 } else { 3351 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (destroy skipped)"); 3352 r.state = ActivityState.DESTROYED; 3353 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3354 r.app = null; 3355 } 3356 } else { 3357 // remove this record from the history. 3358 if (r.finishing) { 3359 removeActivityFromHistoryLocked(r, reason + " hadNoApp"); 3360 removedFromHistory = true; 3361 } else { 3362 if (DEBUG_STATES) Slog.v(TAG, "Moving to DESTROYED: " + r + " (no app)"); 3363 r.state = ActivityState.DESTROYED; 3364 if (DEBUG_APP) Slog.v(TAG, "Clearing app during destroy for activity " + r); 3365 r.app = null; 3366 } 3367 } 3368 3369 r.configChangeFlags = 0; 3370 3371 if (!mLRUActivities.remove(r) && hadApp) { 3372 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3373 } 3374 3375 return removedFromHistory; 3376 } 3377 3378 final void activityDestroyedLocked(IBinder token, String reason) { 3379 final long origId = Binder.clearCallingIdentity(); 3380 try { 3381 ActivityRecord r = ActivityRecord.forTokenLocked(token); 3382 if (r != null) { 3383 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3384 } 3385 if (DEBUG_CONTAINERS) Slog.d(TAG, "activityDestroyedLocked: r=" + r); 3386 3387 if (isInStackLocked(r) != null) { 3388 if (r.state == ActivityState.DESTROYING) { 3389 cleanUpActivityLocked(r, true, false); 3390 removeActivityFromHistoryLocked(r, reason); 3391 } 3392 } 3393 mStackSupervisor.resumeTopActivitiesLocked(); 3394 } finally { 3395 Binder.restoreCallingIdentity(origId); 3396 } 3397 } 3398 3399 void releaseBackgroundResources(ActivityRecord r) { 3400 if (hasVisibleBehindActivity() && 3401 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3402 if (r == topRunningActivityLocked(null)) { 3403 // Don't release the top activity if it has requested to run behind the next 3404 // activity. 3405 return; 3406 } 3407 if (DEBUG_STATES) Slog.d(TAG, "releaseBackgroundResources activtyDisplay=" + 3408 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3409 " thread=" + r.app.thread); 3410 if (r != null && r.app != null && r.app.thread != null) { 3411 try { 3412 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 3413 } catch (RemoteException e) { 3414 } 3415 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 3416 } else { 3417 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 3418 backgroundResourcesReleased(); 3419 } 3420 } 3421 } 3422 3423 final void backgroundResourcesReleased() { 3424 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 3425 final ActivityRecord r = getVisibleBehindActivity(); 3426 if (r != null) { 3427 mStackSupervisor.mStoppingActivities.add(r); 3428 setVisibleBehindActivity(null); 3429 mStackSupervisor.scheduleIdleTimeoutLocked(null); 3430 } 3431 mStackSupervisor.resumeTopActivitiesLocked(); 3432 } 3433 3434 boolean hasVisibleBehindActivity() { 3435 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 3436 } 3437 3438 void setVisibleBehindActivity(ActivityRecord r) { 3439 if (isAttached()) { 3440 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 3441 } 3442 } 3443 3444 ActivityRecord getVisibleBehindActivity() { 3445 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 3446 } 3447 3448 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 3449 ProcessRecord app, String listName) { 3450 int i = list.size(); 3451 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3452 "Removing app " + app + " from list " + listName + " with " + i + " entries"); 3453 while (i > 0) { 3454 i--; 3455 ActivityRecord r = list.get(i); 3456 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); 3457 if (r.app == app) { 3458 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); 3459 list.remove(i); 3460 removeTimeoutsForActivityLocked(r); 3461 } 3462 } 3463 } 3464 3465 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 3466 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 3467 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 3468 "mStoppingActivities"); 3469 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 3470 "mGoingToSleepActivities"); 3471 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 3472 "mWaitingVisibleActivities"); 3473 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 3474 "mFinishingActivities"); 3475 3476 boolean hasVisibleActivities = false; 3477 3478 // Clean out the history list. 3479 int i = numActivities(); 3480 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3481 "Removing app " + app + " from history with " + i + " entries"); 3482 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3483 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3484 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3485 final ActivityRecord r = activities.get(activityNdx); 3486 --i; 3487 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 3488 "Record #" + i + " " + r + ": app=" + r.app); 3489 if (r.app == app) { 3490 final boolean remove; 3491 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 3492 // Don't currently have state for the activity, or 3493 // it is finishing -- always remove it. 3494 remove = true; 3495 } else if (r.launchCount > 2 && 3496 r.lastLaunchTime > (SystemClock.uptimeMillis()-60000)) { 3497 // We have launched this activity too many times since it was 3498 // able to run, so give up and remove it. 3499 remove = true; 3500 } else { 3501 // The process may be gone, but the activity lives on! 3502 remove = false; 3503 } 3504 if (remove) { 3505 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) { 3506 RuntimeException here = new RuntimeException("here"); 3507 here.fillInStackTrace(); 3508 Slog.i(TAG, "Removing activity " + r + " from stack at " + i 3509 + ": haveState=" + r.haveState 3510 + " stateNotNeeded=" + r.stateNotNeeded 3511 + " finishing=" + r.finishing 3512 + " state=" + r.state, here); 3513 } 3514 if (!r.finishing) { 3515 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 3516 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3517 r.userId, System.identityHashCode(r), 3518 r.task.taskId, r.shortComponentName, 3519 "proc died without state saved"); 3520 if (r.state == ActivityState.RESUMED) { 3521 mService.updateUsageStats(r, false); 3522 } 3523 } 3524 } else { 3525 // We have the current state for this activity, so 3526 // it can be restarted later when needed. 3527 if (DEBUG_ALL) Slog.v( 3528 TAG, "Keeping entry, setting app to null"); 3529 if (r.visible) { 3530 hasVisibleActivities = true; 3531 } 3532 if (DEBUG_APP) Slog.v(TAG, "Clearing app during removeHistory for activity " 3533 + r); 3534 r.app = null; 3535 r.nowVisible = false; 3536 if (!r.haveState) { 3537 if (DEBUG_SAVED_STATE) Slog.i(TAG, 3538 "App died, clearing saved state of " + r); 3539 r.icicle = null; 3540 } 3541 } 3542 cleanUpActivityLocked(r, true, true); 3543 if (remove) { 3544 removeActivityFromHistoryLocked(r, "appDied"); 3545 } 3546 } 3547 } 3548 } 3549 3550 return hasVisibleActivities; 3551 } 3552 3553 final void updateTransitLocked(int transit, Bundle options) { 3554 if (options != null) { 3555 ActivityRecord r = topRunningActivityLocked(null); 3556 if (r != null && r.state != ActivityState.RESUMED) { 3557 r.updateOptionsLocked(options); 3558 } else { 3559 ActivityOptions.abort(options); 3560 } 3561 } 3562 mWindowManager.prepareAppTransition(transit, false); 3563 } 3564 3565 void updateTaskMovement(TaskRecord task, boolean toFront) { 3566 if (task.isPersistable) { 3567 task.mLastTimeMoved = System.currentTimeMillis(); 3568 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 3569 // recently will be most negative, tasks sent to the bottom before that will be less 3570 // negative. Similarly for recent tasks moved to the top which will be most positive. 3571 if (!toFront) { 3572 task.mLastTimeMoved *= -1; 3573 } 3574 } 3575 } 3576 3577 void moveHomeStackTaskToTop(int homeStackTaskType) { 3578 final int top = mTaskHistory.size() - 1; 3579 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 3580 final TaskRecord task = mTaskHistory.get(taskNdx); 3581 if (task.taskType == homeStackTaskType) { 3582 if (DEBUG_TASKS || DEBUG_STACK) 3583 Slog.d(TAG, "moveHomeStackTaskToTop: moving " + task); 3584 mTaskHistory.remove(taskNdx); 3585 mTaskHistory.add(top, task); 3586 updateTaskMovement(task, true); 3587 return; 3588 } 3589 } 3590 } 3591 3592 final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, Bundle options, 3593 String reason) { 3594 if (DEBUG_SWITCH) Slog.v(TAG, "moveTaskToFront: " + tr); 3595 3596 final int numTasks = mTaskHistory.size(); 3597 final int index = mTaskHistory.indexOf(tr); 3598 if (numTasks == 0 || index < 0) { 3599 // nothing to do! 3600 if (noAnimation) { 3601 ActivityOptions.abort(options); 3602 } else { 3603 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3604 } 3605 return; 3606 } 3607 3608 // Shift all activities with this task up to the top 3609 // of the stack, keeping them in the same internal order. 3610 insertTaskAtTop(tr); 3611 3612 // Set focus to the top running activity of this stack. 3613 ActivityRecord r = topRunningActivityLocked(null); 3614 mService.setFocusedActivityLocked(r, reason); 3615 3616 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to front transition: task=" + tr); 3617 if (noAnimation) { 3618 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_NONE, false); 3619 if (r != null) { 3620 mNoAnimActivities.add(r); 3621 } 3622 ActivityOptions.abort(options); 3623 } else { 3624 updateTransitLocked(AppTransition.TRANSIT_TASK_TO_FRONT, options); 3625 } 3626 3627 mStackSupervisor.resumeTopActivitiesLocked(); 3628 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 3629 3630 if (VALIDATE_TOKENS) { 3631 validateAppTokensLocked(); 3632 } 3633 } 3634 3635 /** 3636 * Worker method for rearranging history stack. Implements the function of moving all 3637 * activities for a specific task (gathering them if disjoint) into a single group at the 3638 * bottom of the stack. 3639 * 3640 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 3641 * to premeptively cancel the move. 3642 * 3643 * @param taskId The taskId to collect and move to the bottom. 3644 * @return Returns true if the move completed, false if not. 3645 */ 3646 final boolean moveTaskToBackLocked(int taskId) { 3647 final TaskRecord tr = taskForIdLocked(taskId); 3648 if (tr == null) { 3649 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 3650 return false; 3651 } 3652 3653 Slog.i(TAG, "moveTaskToBack: " + tr); 3654 3655 mStackSupervisor.endLockTaskModeIfTaskEnding(tr); 3656 3657 // If we have a watcher, preflight the move before committing to it. First check 3658 // for *other* available tasks, but if none are available, then try again allowing the 3659 // current task to be selected. 3660 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 3661 ActivityRecord next = topRunningActivityLocked(null, taskId); 3662 if (next == null) { 3663 next = topRunningActivityLocked(null, 0); 3664 } 3665 if (next != null) { 3666 // ask watcher if this is allowed 3667 boolean moveOK = true; 3668 try { 3669 moveOK = mService.mController.activityResuming(next.packageName); 3670 } catch (RemoteException e) { 3671 mService.mController = null; 3672 Watchdog.getInstance().setActivityController(null); 3673 } 3674 if (!moveOK) { 3675 return false; 3676 } 3677 } 3678 } 3679 3680 if (DEBUG_TRANSITION) Slog.v(TAG, "Prepare to back transition: task=" + taskId); 3681 3682 boolean prevIsHome = false; 3683 if (tr.isOverHomeStack()) { 3684 final TaskRecord nextTask = getNextTask(tr); 3685 if (nextTask != null) { 3686 nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); 3687 } else { 3688 prevIsHome = true; 3689 } 3690 } 3691 mTaskHistory.remove(tr); 3692 mTaskHistory.add(0, tr); 3693 updateTaskMovement(tr, false); 3694 3695 // There is an assumption that moving a task to the back moves it behind the home activity. 3696 // We make sure here that some activity in the stack will launch home. 3697 int numTasks = mTaskHistory.size(); 3698 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 3699 final TaskRecord task = mTaskHistory.get(taskNdx); 3700 if (task.isOverHomeStack()) { 3701 break; 3702 } 3703 if (taskNdx == 1) { 3704 // Set the last task before tr to go to home. 3705 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 3706 } 3707 } 3708 3709 mWindowManager.prepareAppTransition(AppTransition.TRANSIT_TASK_TO_BACK, false); 3710 mWindowManager.moveTaskToBottom(taskId); 3711 3712 if (VALIDATE_TOKENS) { 3713 validateAppTokensLocked(); 3714 } 3715 3716 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 3717 if (prevIsHome || task == tr && tr.isOverHomeStack() 3718 || numTasks <= 1 && isOnHomeDisplay()) { 3719 if (!mService.mBooting && !mService.mBooted) { 3720 // Not ready yet! 3721 return false; 3722 } 3723 final int taskToReturnTo = tr.getTaskToReturnTo(); 3724 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 3725 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); 3726 } 3727 3728 mStackSupervisor.resumeTopActivitiesLocked(); 3729 return true; 3730 } 3731 3732 static final void logStartActivity(int tag, ActivityRecord r, 3733 TaskRecord task) { 3734 final Uri data = r.intent.getData(); 3735 final String strData = data != null ? data.toSafeString() : null; 3736 3737 EventLog.writeEvent(tag, 3738 r.userId, System.identityHashCode(r), task.taskId, 3739 r.shortComponentName, r.intent.getAction(), 3740 r.intent.getType(), strData, r.intent.getFlags()); 3741 } 3742 3743 /** 3744 * Make sure the given activity matches the current configuration. Returns 3745 * false if the activity had to be destroyed. Returns true if the 3746 * configuration is the same, or the activity will remain running as-is 3747 * for whatever reason. Ensures the HistoryRecord is updated with the 3748 * correct configuration and all other bookkeeping is handled. 3749 */ 3750 final boolean ensureActivityConfigurationLocked(ActivityRecord r, 3751 int globalChanges) { 3752 if (mConfigWillChange) { 3753 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3754 "Skipping config check (will change): " + r); 3755 return true; 3756 } 3757 3758 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3759 "Ensuring correct configuration: " + r); 3760 3761 // Make sure the current stack override configuration is supported by the top task 3762 // before continuing. 3763 final TaskRecord topTask = topTask(); 3764 if (topTask != null && ((topTask.mResizeable && mForcedFullscreen) 3765 || (!topTask.mResizeable && !mFullscreen))) { 3766 final boolean prevFullscreen = mFullscreen; 3767 final Configuration newOverrideConfig = 3768 mWindowManager.forceStackToFullscreen(mStackId, !topTask.mResizeable); 3769 updateOverrideConfiguration(newOverrideConfig); 3770 mForcedFullscreen = !prevFullscreen && mFullscreen; 3771 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3772 "Updated stack config to support task=" + topTask 3773 + " resizeable=" + topTask.mResizeable 3774 + " mForcedFullscreen=" + mForcedFullscreen 3775 + " prevFullscreen=" + prevFullscreen 3776 + " mFullscreen=" + mFullscreen); 3777 } 3778 3779 // Short circuit: if the two configurations are the exact same 3780 // object (the common case), then there is nothing to do. 3781 Configuration newConfig = mService.mConfiguration; 3782 if (r.configuration == newConfig 3783 && r.stackConfigOverride == mOverrideConfig 3784 && !r.forceNewConfig) { 3785 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3786 "Configuration unchanged in " + r); 3787 return true; 3788 } 3789 3790 // We don't worry about activities that are finishing. 3791 if (r.finishing) { 3792 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3793 "Configuration doesn't matter in finishing " + r); 3794 r.stopFreezingScreenLocked(false); 3795 return true; 3796 } 3797 3798 // Okay we now are going to make this activity have the new config. 3799 // But then we need to figure out how it needs to deal with that. 3800 final Configuration oldConfig = r.configuration; 3801 final Configuration oldStackOverride = r.stackConfigOverride; 3802 r.configuration = newConfig; 3803 r.stackConfigOverride = mOverrideConfig; 3804 3805 // Determine what has changed. May be nothing, if this is a config 3806 // that has come back from the app after going idle. In that case 3807 // we just want to leave the official config object now in the 3808 // activity and do nothing else. 3809 int stackChanges = oldStackOverride.diff(mOverrideConfig); 3810 if (stackChanges == 0) { 3811 // {@link Configuration#diff} doesn't catch changes from unset values. 3812 // Check for changes we care about. 3813 if (oldStackOverride.orientation != mOverrideConfig.orientation) { 3814 stackChanges |= ActivityInfo.CONFIG_ORIENTATION; 3815 } 3816 if (oldStackOverride.screenHeightDp != mOverrideConfig.screenHeightDp 3817 || oldStackOverride.screenWidthDp != mOverrideConfig.screenWidthDp) { 3818 stackChanges |= ActivityInfo.CONFIG_SCREEN_SIZE; 3819 } 3820 if (oldStackOverride.smallestScreenWidthDp != mOverrideConfig.smallestScreenWidthDp) { 3821 stackChanges |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; 3822 } 3823 } 3824 final int changes = oldConfig.diff(newConfig) | stackChanges; 3825 if (changes == 0 && !r.forceNewConfig) { 3826 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3827 "Configuration no differences in " + r); 3828 return true; 3829 } 3830 3831 // If the activity isn't currently running, just leave the new 3832 // configuration and it will pick that up next time it starts. 3833 if (r.app == null || r.app.thread == null) { 3834 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3835 "Configuration doesn't matter not running " + r); 3836 r.stopFreezingScreenLocked(false); 3837 r.forceNewConfig = false; 3838 return true; 3839 } 3840 3841 // Figure out how to handle the changes between the configurations. 3842 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3843 "Checking to restart " + r.info.name + ": changed=0x" 3844 + Integer.toHexString(changes) + ", handles=0x" 3845 + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig); 3846 3847 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 3848 // Aha, the activity isn't handling the change, so DIE DIE DIE. 3849 r.configChangeFlags |= changes; 3850 r.startFreezingScreenLocked(r.app, globalChanges); 3851 r.forceNewConfig = false; 3852 if (r.app == null || r.app.thread == null) { 3853 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3854 "Config is destroying non-running " + r); 3855 destroyActivityLocked(r, true, "config"); 3856 } else if (r.state == ActivityState.PAUSING) { 3857 // A little annoying: we are waiting for this activity to 3858 // finish pausing. Let's not do anything now, but just 3859 // flag that it needs to be restarted when done pausing. 3860 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3861 "Config is skipping already pausing " + r); 3862 r.configDestroy = true; 3863 return true; 3864 } else if (r.state == ActivityState.RESUMED) { 3865 // Try to optimize this case: the configuration is changing 3866 // and we need to restart the top, resumed activity. 3867 // Instead of doing the normal handshaking, just say 3868 // "restart!". 3869 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3870 "Config is relaunching resumed " + r); 3871 relaunchActivityLocked(r, r.configChangeFlags, true); 3872 r.configChangeFlags = 0; 3873 } else { 3874 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 3875 "Config is relaunching non-resumed " + r); 3876 relaunchActivityLocked(r, r.configChangeFlags, false); 3877 r.configChangeFlags = 0; 3878 } 3879 3880 // All done... tell the caller we weren't able to keep this 3881 // activity around. 3882 return false; 3883 } 3884 3885 // Default case: the activity can handle this new configuration, so hand it over. 3886 // NOTE: We only forward the stack override configuration as the system level configuration 3887 // changes is always sent to all processes when they happen so it can just use whatever 3888 // system level configuration it last got. 3889 if (r.app != null && r.app.thread != null) { 3890 try { 3891 if (DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Sending new config to " + r); 3892 r.app.thread.scheduleActivityConfigurationChanged( 3893 r.appToken, new Configuration(mOverrideConfig)); 3894 } catch (RemoteException e) { 3895 // If process died, whatever. 3896 } 3897 } 3898 r.stopFreezingScreenLocked(false); 3899 3900 return true; 3901 } 3902 3903 private boolean relaunchActivityLocked(ActivityRecord r, int changes, boolean andResume) { 3904 List<ResultInfo> results = null; 3905 List<ReferrerIntent> newIntents = null; 3906 if (andResume) { 3907 results = r.results; 3908 newIntents = r.newIntents; 3909 } 3910 if (DEBUG_SWITCH) Slog.v(TAG, "Relaunching: " + r 3911 + " with results=" + results + " newIntents=" + newIntents 3912 + " andResume=" + andResume); 3913 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 3914 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 3915 r.task.taskId, r.shortComponentName); 3916 3917 r.startFreezingScreenLocked(r.app, 0); 3918 3919 mStackSupervisor.removeChildActivityContainers(r); 3920 3921 try { 3922 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, 3923 (andResume ? "Relaunching to RESUMED " : "Relaunching to PAUSED ") 3924 + r); 3925 r.forceNewConfig = false; 3926 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, 3927 !andResume, new Configuration(mService.mConfiguration), 3928 new Configuration(mOverrideConfig)); 3929 // Note: don't need to call pauseIfSleepingLocked() here, because 3930 // the caller will only pass in 'andResume' if this activity is 3931 // currently resumed, which implies we aren't sleeping. 3932 } catch (RemoteException e) { 3933 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG, "Relaunch failed", e); 3934 } 3935 3936 if (andResume) { 3937 r.results = null; 3938 r.newIntents = null; 3939 r.state = ActivityState.RESUMED; 3940 } else { 3941 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3942 r.state = ActivityState.PAUSED; 3943 } 3944 3945 return true; 3946 } 3947 3948 boolean willActivityBeVisibleLocked(IBinder token) { 3949 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3950 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3951 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3952 final ActivityRecord r = activities.get(activityNdx); 3953 if (r.appToken == token) { 3954 return true; 3955 } 3956 if (r.fullscreen && !r.finishing) { 3957 return false; 3958 } 3959 } 3960 } 3961 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 3962 if (r == null) { 3963 return false; 3964 } 3965 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 3966 + " would have returned true for r=" + r); 3967 return !r.finishing; 3968 } 3969 3970 void closeSystemDialogsLocked() { 3971 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3972 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3973 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3974 final ActivityRecord r = activities.get(activityNdx); 3975 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 3976 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 3977 } 3978 } 3979 } 3980 } 3981 3982 boolean forceStopPackageLocked(String name, boolean doit, boolean evenPersistent, int userId) { 3983 boolean didSomething = false; 3984 TaskRecord lastTask = null; 3985 ComponentName homeActivity = null; 3986 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3987 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3988 int numActivities = activities.size(); 3989 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 3990 ActivityRecord r = activities.get(activityNdx); 3991 final boolean samePackage = r.packageName.equals(name) 3992 || (name == null && r.userId == userId); 3993 if ((userId == UserHandle.USER_ALL || r.userId == userId) 3994 && (samePackage || r.task == lastTask) 3995 && (r.app == null || evenPersistent || !r.app.persistent)) { 3996 if (!doit) { 3997 if (r.finishing) { 3998 // If this activity is just finishing, then it is not 3999 // interesting as far as something to stop. 4000 continue; 4001 } 4002 return true; 4003 } 4004 if (r.isHomeActivity()) { 4005 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 4006 Slog.i(TAG, "Skip force-stop again " + r); 4007 continue; 4008 } else { 4009 homeActivity = r.realActivity; 4010 } 4011 } 4012 didSomething = true; 4013 Slog.i(TAG, " Force finishing activity " + r); 4014 if (samePackage) { 4015 if (r.app != null) { 4016 r.app.removed = true; 4017 } 4018 r.app = null; 4019 } 4020 lastTask = r.task; 4021 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 4022 true)) { 4023 // r has been deleted from mActivities, accommodate. 4024 --numActivities; 4025 --activityNdx; 4026 } 4027 } 4028 } 4029 } 4030 return didSomething; 4031 } 4032 4033 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 4034 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4035 final TaskRecord task = mTaskHistory.get(taskNdx); 4036 ActivityRecord r = null; 4037 ActivityRecord top = null; 4038 int numActivities = 0; 4039 int numRunning = 0; 4040 final ArrayList<ActivityRecord> activities = task.mActivities; 4041 if (activities.isEmpty()) { 4042 continue; 4043 } 4044 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 4045 continue; 4046 } 4047 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4048 r = activities.get(activityNdx); 4049 4050 // Initialize state for next task if needed. 4051 if (top == null || (top.state == ActivityState.INITIALIZING)) { 4052 top = r; 4053 numActivities = numRunning = 0; 4054 } 4055 4056 // Add 'r' into the current task. 4057 numActivities++; 4058 if (r.app != null && r.app.thread != null) { 4059 numRunning++; 4060 } 4061 4062 if (DEBUG_ALL) Slog.v( 4063 TAG, r.intent.getComponent().flattenToShortString() 4064 + ": task=" + r.task); 4065 } 4066 4067 RunningTaskInfo ci = new RunningTaskInfo(); 4068 ci.id = task.taskId; 4069 ci.baseActivity = r.intent.getComponent(); 4070 ci.topActivity = top.intent.getComponent(); 4071 ci.lastActiveTime = task.lastActiveTime; 4072 4073 if (top.task != null) { 4074 ci.description = top.task.lastDescription; 4075 } 4076 ci.numActivities = numActivities; 4077 ci.numRunning = numRunning; 4078 //System.out.println( 4079 // "#" + maxNum + ": " + " descr=" + ci.description); 4080 list.add(ci); 4081 } 4082 } 4083 4084 public void unhandledBackLocked() { 4085 final int top = mTaskHistory.size() - 1; 4086 if (DEBUG_SWITCH) Slog.d( 4087 TAG, "Performing unhandledBack(): top activity at " + top); 4088 if (top >= 0) { 4089 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 4090 int activityTop = activities.size() - 1; 4091 if (activityTop > 0) { 4092 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 4093 "unhandled-back", true); 4094 } 4095 } 4096 } 4097 4098 /** 4099 * Reset local parameters because an app's activity died. 4100 * @param app The app of the activity that died. 4101 * @return result from removeHistoryRecordsForAppLocked. 4102 */ 4103 boolean handleAppDiedLocked(ProcessRecord app) { 4104 if (mPausingActivity != null && mPausingActivity.app == app) { 4105 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG, 4106 "App died while pausing: " + mPausingActivity); 4107 mPausingActivity = null; 4108 } 4109 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 4110 mLastPausedActivity = null; 4111 mLastNoHistoryActivity = null; 4112 } 4113 4114 return removeHistoryRecordsForAppLocked(app); 4115 } 4116 4117 void handleAppCrashLocked(ProcessRecord app) { 4118 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4119 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4120 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4121 final ActivityRecord r = activities.get(activityNdx); 4122 if (r.app == app) { 4123 Slog.w(TAG, " Force finishing activity " 4124 + r.intent.getComponent().flattenToShortString()); 4125 // Force the destroy to skip right to removal. 4126 r.app = null; 4127 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4128 } 4129 } 4130 } 4131 } 4132 4133 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4134 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4135 boolean printed = false; 4136 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4137 final TaskRecord task = mTaskHistory.get(taskNdx); 4138 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4139 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4140 dumpClient, dumpPackage, needSep, header, 4141 " Task id #" + task.taskId); 4142 if (printed) { 4143 header = null; 4144 } 4145 } 4146 return printed; 4147 } 4148 4149 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4150 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4151 4152 if ("all".equals(name)) { 4153 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4154 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4155 } 4156 } else if ("top".equals(name)) { 4157 final int top = mTaskHistory.size() - 1; 4158 if (top >= 0) { 4159 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4160 int listTop = list.size() - 1; 4161 if (listTop >= 0) { 4162 activities.add(list.get(listTop)); 4163 } 4164 } 4165 } else { 4166 ItemMatcher matcher = new ItemMatcher(); 4167 matcher.build(name); 4168 4169 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4170 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4171 if (matcher.match(r1, r1.intent.getComponent())) { 4172 activities.add(r1); 4173 } 4174 } 4175 } 4176 } 4177 4178 return activities; 4179 } 4180 4181 ActivityRecord restartPackage(String packageName) { 4182 ActivityRecord starting = topRunningActivityLocked(null); 4183 4184 // All activities that came from the package must be 4185 // restarted as if there was a config change. 4186 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4187 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4188 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4189 final ActivityRecord a = activities.get(activityNdx); 4190 if (a.info.packageName.equals(packageName)) { 4191 a.forceNewConfig = true; 4192 if (starting != null && a == starting && a.visible) { 4193 a.startFreezingScreenLocked(starting.app, 4194 ActivityInfo.CONFIG_SCREEN_LAYOUT); 4195 } 4196 } 4197 } 4198 } 4199 4200 return starting; 4201 } 4202 4203 void removeTask(TaskRecord task, String reason) { 4204 removeTask(task, reason, true); 4205 } 4206 4207 void removeTask(TaskRecord task, String reason, boolean removeFromWindowManager) { 4208 mStackSupervisor.endLockTaskModeIfTaskEnding(task); 4209 if (removeFromWindowManager) { 4210 mWindowManager.removeTask(task.taskId); 4211 } 4212 final ActivityRecord r = mResumedActivity; 4213 if (r != null && r.task == task) { 4214 mResumedActivity = null; 4215 } 4216 4217 final int taskNdx = mTaskHistory.indexOf(task); 4218 final int topTaskNdx = mTaskHistory.size() - 1; 4219 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4220 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4221 if (!nextTask.isOverHomeStack()) { 4222 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4223 } 4224 } 4225 mTaskHistory.remove(task); 4226 updateTaskMovement(task, true); 4227 4228 if (task.mActivities.isEmpty()) { 4229 final boolean isVoiceSession = task.voiceSession != null; 4230 if (isVoiceSession) { 4231 try { 4232 task.voiceSession.taskFinished(task.intent, task.taskId); 4233 } catch (RemoteException e) { 4234 } 4235 } 4236 if (task.autoRemoveFromRecents() || isVoiceSession) { 4237 // Task creator asked to remove this when done, or this task was a voice 4238 // interaction, so it should not remain on the recent tasks list. 4239 mRecentTasks.remove(task); 4240 task.removedFromRecents(); 4241 } 4242 } 4243 4244 if (mTaskHistory.isEmpty()) { 4245 if (DEBUG_STACK) Slog.i(TAG, "removeTask: removing stack=" + this); 4246 final boolean notHomeStack = !isHomeStack(); 4247 if (isOnHomeDisplay()) { 4248 String myReason = reason + " leftTaskHistoryEmpty"; 4249 if (mFullscreen || !adjustFocusToNextVisibleStackLocked(null, myReason)) { 4250 mStackSupervisor.moveHomeStack(notHomeStack, myReason); 4251 } 4252 } 4253 if (mStacks != null) { 4254 mStacks.remove(this); 4255 mStacks.add(0, this); 4256 } 4257 if (notHomeStack) { 4258 mActivityContainer.onTaskListEmptyLocked(); 4259 } 4260 } 4261 4262 task.stack = null; 4263 } 4264 4265 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 4266 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 4267 boolean toTop) { 4268 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 4269 voiceInteractor); 4270 addTask(task, toTop, false); 4271 return task; 4272 } 4273 4274 ArrayList<TaskRecord> getAllTasks() { 4275 return new ArrayList<>(mTaskHistory); 4276 } 4277 4278 void addTask(final TaskRecord task, final boolean toTop, boolean moving) { 4279 task.stack = this; 4280 if (toTop) { 4281 insertTaskAtTop(task); 4282 } else { 4283 mTaskHistory.add(0, task); 4284 updateTaskMovement(task, false); 4285 } 4286 if (!moving && task.voiceSession != null) { 4287 try { 4288 task.voiceSession.taskStarted(task.intent, task.taskId); 4289 } catch (RemoteException e) { 4290 } 4291 } 4292 } 4293 4294 public int getStackId() { 4295 return mStackId; 4296 } 4297 4298 @Override 4299 public String toString() { 4300 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 4301 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 4302 } 4303 4304 boolean updateOverrideConfiguration(Configuration newConfig) { 4305 Configuration oldConfig = mOverrideConfig; 4306 mOverrideConfig = (newConfig == null) ? Configuration.EMPTY : newConfig; 4307 // We override the configuration only when the stack's dimensions are different from 4308 // the display. In this manner, we know that if the override configuration is empty, 4309 // the stack is necessarily full screen. 4310 mFullscreen = Configuration.EMPTY.equals(mOverrideConfig); 4311 return !mOverrideConfig.equals(oldConfig); 4312 } 4313} 4314