ActivityStack.java revision 3b23239d6ec9ded858d75f272ca1a677c5c431f9
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 android.app.ActivityManager.StackId.DOCKED_STACK_ID; 20import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID; 21import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID; 22import static android.app.ActivityManager.StackId.HOME_STACK_ID; 23import static android.app.ActivityManager.StackId.INVALID_STACK_ID; 24import static android.app.ActivityManager.StackId.PINNED_STACK_ID; 25import static android.content.pm.ActivityInfo.CONFIG_ORIENTATION; 26import static android.content.pm.ActivityInfo.CONFIG_SCREEN_LAYOUT; 27import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE; 28import static android.content.pm.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; 29import static android.content.pm.ActivityInfo.FLAG_RESUME_WHILE_PAUSING; 30import static android.content.pm.ActivityInfo.FLAG_SHOW_FOR_ALL_USERS; 31import static android.content.res.Configuration.SCREENLAYOUT_UNDEFINED; 32import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ADD_REMOVE; 33import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ALL; 34import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_APP; 35import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CLEANUP; 36import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONFIGURATION; 37import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_CONTAINERS; 38import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_LOCKSCREEN; 39import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PAUSE; 40import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RELEASE; 41import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_RESULTS; 42import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SAVED_STATE; 43import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SCREENSHOTS; 44import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STACK; 45import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_STATES; 46import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_SWITCH; 47import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TASKS; 48import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_TRANSITION; 49import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_USER_LEAVING; 50import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_VISIBILITY; 51import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_ADD_REMOVE; 52import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_APP; 53import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CLEANUP; 54import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONFIGURATION; 55import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_CONTAINERS; 56import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_PAUSE; 57import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RELEASE; 58import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_RESULTS; 59import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SAVED_STATE; 60import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SCREENSHOTS; 61import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STACK; 62import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_STATES; 63import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_SWITCH; 64import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TASKS; 65import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_TRANSITION; 66import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_USER_LEAVING; 67import static com.android.server.am.ActivityManagerDebugConfig.POSTFIX_VISIBILITY; 68import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM; 69import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; 70import static com.android.server.am.ActivityManagerService.LOCK_SCREEN_SHOWN; 71import static com.android.server.am.ActivityRecord.APPLICATION_ACTIVITY_TYPE; 72import static com.android.server.am.ActivityRecord.HOME_ACTIVITY_TYPE; 73import static com.android.server.am.ActivityRecord.STARTING_WINDOW_REMOVED; 74import static com.android.server.am.ActivityRecord.STARTING_WINDOW_SHOWN; 75import static com.android.server.am.ActivityStackSupervisor.FindTaskResult; 76import static com.android.server.am.ActivityStackSupervisor.MOVING; 77import static com.android.server.am.ActivityStackSupervisor.ON_TOP; 78import static com.android.server.am.ActivityStackSupervisor.PRESERVE_WINDOWS; 79import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_CLOSE; 80import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_OPEN; 81import static com.android.server.wm.AppTransition.TRANSIT_NONE; 82import static com.android.server.wm.AppTransition.TRANSIT_TASK_CLOSE; 83import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN; 84import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN_BEHIND; 85import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_BACK; 86import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_FRONT; 87 88import android.app.Activity; 89import android.app.ActivityManager; 90import android.app.ActivityManager.RunningTaskInfo; 91import android.app.ActivityManager.StackId; 92import android.app.ActivityOptions; 93import android.app.AppGlobals; 94import android.app.IActivityController; 95import android.app.ResultInfo; 96import android.content.ComponentName; 97import android.content.Intent; 98import android.content.pm.ActivityInfo; 99import android.content.pm.ApplicationInfo; 100import android.content.res.Configuration; 101import android.graphics.Bitmap; 102import android.graphics.Point; 103import android.graphics.Rect; 104import android.net.Uri; 105import android.os.Binder; 106import android.os.Bundle; 107import android.os.Debug; 108import android.os.Handler; 109import android.os.IBinder; 110import android.os.Looper; 111import android.os.Message; 112import android.os.PersistableBundle; 113import android.os.RemoteException; 114import android.os.SystemClock; 115import android.os.Trace; 116import android.os.UserHandle; 117import android.service.voice.IVoiceInteractionSession; 118import android.util.ArraySet; 119import android.util.EventLog; 120import android.util.Log; 121import android.util.Slog; 122import android.view.Display; 123 124import com.android.internal.app.IVoiceInteractor; 125import com.android.internal.content.ReferrerIntent; 126import com.android.internal.os.BatteryStatsImpl; 127import com.android.server.Watchdog; 128import com.android.server.am.ActivityManagerService.ItemMatcher; 129import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 130import com.android.server.wm.TaskGroup; 131import com.android.server.wm.WindowManagerService; 132 133import java.io.FileDescriptor; 134import java.io.PrintWriter; 135import java.lang.ref.WeakReference; 136import java.util.ArrayList; 137import java.util.Iterator; 138import java.util.List; 139import java.util.Objects; 140import java.util.Set; 141 142/** 143 * State and management of a single stack of activities. 144 */ 145final class ActivityStack { 146 147 private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM; 148 private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE; 149 private static final String TAG_APP = TAG + POSTFIX_APP; 150 private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP; 151 private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION; 152 private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS; 153 private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE; 154 private static final String TAG_RELEASE = TAG + POSTFIX_RELEASE; 155 private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS; 156 private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE; 157 private static final String TAG_SCREENSHOTS = TAG + POSTFIX_SCREENSHOTS; 158 private static final String TAG_STACK = TAG + POSTFIX_STACK; 159 private static final String TAG_STATES = TAG + POSTFIX_STATES; 160 private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH; 161 private static final String TAG_TASKS = TAG + POSTFIX_TASKS; 162 private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION; 163 private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING; 164 private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY; 165 166 private static final boolean VALIDATE_TOKENS = false; 167 168 // Ticks during which we check progress while waiting for an app to launch. 169 static final int LAUNCH_TICK = 500; 170 171 // How long we wait until giving up on the last activity to pause. This 172 // is short because it directly impacts the responsiveness of starting the 173 // next activity. 174 static final int PAUSE_TIMEOUT = 500; 175 176 // How long we wait for the activity to tell us it has stopped before 177 // giving up. This is a good amount of time because we really need this 178 // from the application in order to get its saved state. 179 static final int STOP_TIMEOUT = 10 * 1000; 180 181 // How long we wait until giving up on an activity telling us it has 182 // finished destroying itself. 183 static final int DESTROY_TIMEOUT = 10 * 1000; 184 185 // How long until we reset a task when the user returns to it. Currently 186 // disabled. 187 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 188 189 // How long between activity launches that we consider safe to not warn 190 // the user about an unexpected activity being launched on top. 191 static final long START_WARN_TIME = 5 * 1000; 192 193 // Set to false to disable the preview that is shown while a new activity 194 // is being started. 195 static final boolean SHOW_APP_STARTING_PREVIEW = true; 196 197 // How long to wait for all background Activities to redraw following a call to 198 // convertToTranslucent(). 199 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 200 201 // How many activities have to be scheduled to stop to force a stop pass. 202 private static final int MAX_STOPPING_TO_FORCE = 3; 203 204 enum ActivityState { 205 INITIALIZING, 206 RESUMED, 207 PAUSING, 208 PAUSED, 209 STOPPING, 210 STOPPED, 211 FINISHING, 212 DESTROYING, 213 DESTROYED 214 } 215 216 // Stack is not considered visible. 217 static final int STACK_INVISIBLE = 0; 218 // Stack is considered visible 219 static final int STACK_VISIBLE = 1; 220 // Stack is considered visible, but only becuase it has activity that is visible behind other 221 // activities and there is a specific combination of stacks. 222 static final int STACK_VISIBLE_ACTIVITY_BEHIND = 2; 223 224 /* The various modes for the method {@link #removeTask}. */ 225 // Task is being completely removed from all stacks in the system. 226 static final int REMOVE_TASK_MODE_DESTROYING = 0; 227 // Task is being removed from this stack so we can add it to another stack. In the case we are 228 // moving we don't want to perform some operations on the task like removing it from window 229 // manager or recents. 230 static final int REMOVE_TASK_MODE_MOVING = 1; 231 // Similar to {@link #REMOVE_TASK_MODE_MOVING} and the task will be added to the top of its new 232 // stack and the new stack will be on top of all stacks. 233 static final int REMOVE_TASK_MODE_MOVING_TO_TOP = 2; 234 235 final ActivityManagerService mService; 236 final WindowManagerService mWindowManager; 237 private final RecentTasks mRecentTasks; 238 239 /** 240 * The back history of all previous (and possibly still 241 * running) activities. It contains #TaskRecord objects. 242 */ 243 private final ArrayList<TaskRecord> mTaskHistory = new ArrayList<>(); 244 245 /** 246 * Used for validating app tokens with window manager. 247 */ 248 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<>(); 249 250 /** 251 * List of running activities, sorted by recent usage. 252 * The first entry in the list is the least recently used. 253 * It contains HistoryRecord objects. 254 */ 255 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<>(); 256 257 /** 258 * Animations that for the current transition have requested not to 259 * be considered for the transition animation. 260 */ 261 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<>(); 262 263 /** 264 * When we are in the process of pausing an activity, before starting the 265 * next one, this variable holds the activity that is currently being paused. 266 */ 267 ActivityRecord mPausingActivity = null; 268 269 /** 270 * This is the last activity that we put into the paused state. This is 271 * used to determine if we need to do an activity transition while sleeping, 272 * when we normally hold the top activity paused. 273 */ 274 ActivityRecord mLastPausedActivity = null; 275 276 /** 277 * Activities that specify No History must be removed once the user navigates away from them. 278 * If the device goes to sleep with such an activity in the paused state then we save it here 279 * and finish it later if another activity replaces it on wakeup. 280 */ 281 ActivityRecord mLastNoHistoryActivity = null; 282 283 /** 284 * Current activity that is resumed, or null if there is none. 285 */ 286 ActivityRecord mResumedActivity = null; 287 288 /** 289 * This is the last activity that has been started. It is only used to 290 * identify when multiple activities are started at once so that the user 291 * can be warned they may not be in the activity they think they are. 292 */ 293 ActivityRecord mLastStartedActivity = null; 294 295 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 296 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 297 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 298 // Activity in mTranslucentActivityWaiting is notified via 299 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 300 // background activity being drawn then the same call will be made with a true value. 301 ActivityRecord mTranslucentActivityWaiting = null; 302 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = new ArrayList<>(); 303 304 /** 305 * Set when we know we are going to be calling updateConfiguration() 306 * soon, so want to skip intermediate config checks. 307 */ 308 boolean mConfigWillChange; 309 310 // Whether or not this stack covers the entire screen; by default stacks are fullscreen 311 boolean mFullscreen = true; 312 // Current bounds of the stack or null if fullscreen. 313 Rect mBounds = null; 314 315 boolean mUpdateBoundsDeferred; 316 boolean mUpdateBoundsDeferredCalled; 317 final Rect mDeferredBounds = new Rect(); 318 final Rect mDeferredTaskBounds = new Rect(); 319 final Rect mDeferredTaskInsetBounds = new Rect(); 320 321 long mLaunchStartTime = 0; 322 long mFullyDrawnStartTime = 0; 323 324 int mCurrentUser; 325 326 final int mStackId; 327 final ActivityContainer mActivityContainer; 328 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 329 ArrayList<ActivityStack> mStacks; 330 /** The attached Display's unique identifier, or -1 if detached */ 331 int mDisplayId; 332 333 /** Run all ActivityStacks through this */ 334 final ActivityStackSupervisor mStackSupervisor; 335 336 private final LaunchingTaskPositioner mTaskPositioner; 337 338 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 339 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 340 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 341 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 342 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 343 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 344 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 345 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 346 347 static class ScheduleDestroyArgs { 348 final ProcessRecord mOwner; 349 final String mReason; 350 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 351 mOwner = owner; 352 mReason = reason; 353 } 354 } 355 356 final Handler mHandler; 357 358 final class ActivityStackHandler extends Handler { 359 360 ActivityStackHandler(Looper looper) { 361 super(looper); 362 } 363 364 @Override 365 public void handleMessage(Message msg) { 366 switch (msg.what) { 367 case PAUSE_TIMEOUT_MSG: { 368 ActivityRecord r = (ActivityRecord)msg.obj; 369 // We don't at this point know if the activity is fullscreen, 370 // so we need to be conservative and assume it isn't. 371 Slog.w(TAG, "Activity pause timeout for " + r); 372 synchronized (mService) { 373 if (r.app != null) { 374 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 375 } 376 activityPausedLocked(r.appToken, true); 377 } 378 } break; 379 case LAUNCH_TICK_MSG: { 380 ActivityRecord r = (ActivityRecord)msg.obj; 381 synchronized (mService) { 382 if (r.continueLaunchTickingLocked()) { 383 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 384 } 385 } 386 } break; 387 case DESTROY_TIMEOUT_MSG: { 388 ActivityRecord r = (ActivityRecord)msg.obj; 389 // We don't at this point know if the activity is fullscreen, 390 // so we need to be conservative and assume it isn't. 391 Slog.w(TAG, "Activity destroy timeout for " + r); 392 synchronized (mService) { 393 activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout"); 394 } 395 } break; 396 case STOP_TIMEOUT_MSG: { 397 ActivityRecord r = (ActivityRecord)msg.obj; 398 // We don't at this point know if the activity is fullscreen, 399 // so we need to be conservative and assume it isn't. 400 Slog.w(TAG, "Activity stop timeout for " + r); 401 synchronized (mService) { 402 if (r.isInHistory()) { 403 activityStoppedLocked(r, null, null, null); 404 } 405 } 406 } break; 407 case DESTROY_ACTIVITIES_MSG: { 408 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 409 synchronized (mService) { 410 destroyActivitiesLocked(args.mOwner, args.mReason); 411 } 412 } break; 413 case TRANSLUCENT_TIMEOUT_MSG: { 414 synchronized (mService) { 415 notifyActivityDrawnLocked(null); 416 } 417 } break; 418 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 419 synchronized (mService) { 420 final ActivityRecord r = getVisibleBehindActivity(); 421 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 422 if (r != null) { 423 mService.killAppAtUsersRequest(r.app, null); 424 } 425 } 426 } break; 427 } 428 } 429 } 430 431 int numActivities() { 432 int count = 0; 433 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 434 count += mTaskHistory.get(taskNdx).mActivities.size(); 435 } 436 return count; 437 } 438 439 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer, 440 RecentTasks recentTasks) { 441 mActivityContainer = activityContainer; 442 mStackSupervisor = activityContainer.getOuter(); 443 mService = mStackSupervisor.mService; 444 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 445 mWindowManager = mService.mWindowManager; 446 mStackId = activityContainer.mStackId; 447 mCurrentUser = mService.mUserController.getCurrentUserIdLocked(); 448 mRecentTasks = recentTasks; 449 mTaskPositioner = mStackId == FREEFORM_WORKSPACE_STACK_ID 450 ? new LaunchingTaskPositioner() : null; 451 } 452 453 void attachDisplay(ActivityStackSupervisor.ActivityDisplay activityDisplay, boolean onTop) { 454 mDisplayId = activityDisplay.mDisplayId; 455 mStacks = activityDisplay.mStacks; 456 mBounds = mWindowManager.attachStack(mStackId, activityDisplay.mDisplayId, onTop); 457 mFullscreen = mBounds == null; 458 if (mTaskPositioner != null) { 459 mTaskPositioner.setDisplay(activityDisplay.mDisplay); 460 mTaskPositioner.configure(mBounds); 461 } 462 463 if (mStackId == DOCKED_STACK_ID) { 464 // If we created a docked stack we want to resize it so it resizes all other stacks 465 // in the system. 466 mStackSupervisor.resizeDockedStackLocked( 467 mBounds, null, null, null, null, PRESERVE_WINDOWS); 468 } 469 } 470 471 void detachDisplay() { 472 mDisplayId = Display.INVALID_DISPLAY; 473 mStacks = null; 474 if (mTaskPositioner != null) { 475 mTaskPositioner.reset(); 476 } 477 mWindowManager.detachStack(mStackId); 478 if (mStackId == DOCKED_STACK_ID) { 479 // If we removed a docked stack we want to resize it so it resizes all other stacks 480 // in the system to fullscreen. 481 mStackSupervisor.resizeDockedStackLocked( 482 null, null, null, null, null, PRESERVE_WINDOWS); 483 } 484 } 485 486 public void getDisplaySize(Point out) { 487 mActivityContainer.mActivityDisplay.mDisplay.getSize(out); 488 } 489 490 /** 491 * Defers updating the bounds of the stack. If the stack was resized/repositioned while 492 * deferring, the bounds will update in {@link #continueUpdateBounds()}. 493 */ 494 void deferUpdateBounds() { 495 if (!mUpdateBoundsDeferred) { 496 mUpdateBoundsDeferred = true; 497 mUpdateBoundsDeferredCalled = false; 498 } 499 } 500 501 /** 502 * Continues updating bounds after updates have been deferred. If there was a resize attempt 503 * between {@link #deferUpdateBounds()} and {@link #continueUpdateBounds()}, the stack will 504 * be resized to that bounds. 505 */ 506 void continueUpdateBounds() { 507 final boolean wasDeferred = mUpdateBoundsDeferred; 508 mUpdateBoundsDeferred = false; 509 if (wasDeferred && mUpdateBoundsDeferredCalled) { 510 mStackSupervisor.resizeStackUncheckedLocked(this, 511 mDeferredBounds.isEmpty() ? null : mDeferredBounds, 512 mDeferredTaskBounds.isEmpty() ? null : mDeferredTaskBounds, 513 mDeferredTaskInsetBounds.isEmpty() ? null : mDeferredTaskInsetBounds); 514 } 515 } 516 517 boolean updateBoundsAllowed(Rect bounds, Rect tempTaskBounds, 518 Rect tempTaskInsetBounds) { 519 if (!mUpdateBoundsDeferred) { 520 return true; 521 } 522 if (bounds != null) { 523 mDeferredBounds.set(bounds); 524 } else { 525 mDeferredBounds.setEmpty(); 526 } 527 if (tempTaskBounds != null) { 528 mDeferredTaskBounds.set(tempTaskBounds); 529 } else { 530 mDeferredTaskBounds.setEmpty(); 531 } 532 if (tempTaskInsetBounds != null) { 533 mDeferredTaskInsetBounds.set(tempTaskInsetBounds); 534 } else { 535 mDeferredTaskInsetBounds.setEmpty(); 536 } 537 mUpdateBoundsDeferredCalled = true; 538 return false; 539 } 540 541 void setBounds(Rect bounds) { 542 mBounds = mFullscreen ? null : new Rect(bounds); 543 if (mTaskPositioner != null) { 544 mTaskPositioner.configure(bounds); 545 } 546 } 547 548 boolean okToShowLocked(ActivityRecord r) { 549 return mStackSupervisor.okToShowLocked(r); 550 } 551 552 final ActivityRecord topRunningActivityLocked() { 553 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 554 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(); 555 if (r != null) { 556 return r; 557 } 558 } 559 return null; 560 } 561 562 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 563 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 564 final TaskRecord task = mTaskHistory.get(taskNdx); 565 final ArrayList<ActivityRecord> activities = task.mActivities; 566 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 567 ActivityRecord r = activities.get(activityNdx); 568 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 569 return r; 570 } 571 } 572 } 573 return null; 574 } 575 576 /** 577 * This is a simplified version of topRunningActivityLocked that provides a number of 578 * optional skip-over modes. It is intended for use with the ActivityController hook only. 579 * 580 * @param token If non-null, any history records matching this token will be skipped. 581 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 582 * 583 * @return Returns the HistoryRecord of the next activity on the stack. 584 */ 585 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 586 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 587 TaskRecord task = mTaskHistory.get(taskNdx); 588 if (task.taskId == taskId) { 589 continue; 590 } 591 ArrayList<ActivityRecord> activities = task.mActivities; 592 for (int i = activities.size() - 1; i >= 0; --i) { 593 final ActivityRecord r = activities.get(i); 594 // Note: the taskId check depends on real taskId fields being non-zero 595 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 596 return r; 597 } 598 } 599 } 600 return null; 601 } 602 603 final ActivityRecord topActivity() { 604 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 605 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 606 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 607 final ActivityRecord r = activities.get(activityNdx); 608 if (!r.finishing) { 609 return r; 610 } 611 } 612 } 613 return null; 614 } 615 616 final TaskRecord topTask() { 617 final int size = mTaskHistory.size(); 618 if (size > 0) { 619 return mTaskHistory.get(size - 1); 620 } 621 return null; 622 } 623 624 TaskRecord taskForIdLocked(int id) { 625 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 626 final TaskRecord task = mTaskHistory.get(taskNdx); 627 if (task.taskId == id) { 628 return task; 629 } 630 } 631 return null; 632 } 633 634 ActivityRecord isInStackLocked(IBinder token) { 635 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 636 return isInStackLocked(r); 637 } 638 639 ActivityRecord isInStackLocked(ActivityRecord r) { 640 if (r == null) { 641 return null; 642 } 643 final TaskRecord task = r.task; 644 if (task != null && task.stack != null 645 && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 646 if (task.stack != this) Slog.w(TAG, 647 "Illegal state! task does not point to stack it is in."); 648 return r; 649 } 650 return null; 651 } 652 653 final boolean updateLRUListLocked(ActivityRecord r) { 654 final boolean hadit = mLRUActivities.remove(r); 655 mLRUActivities.add(r); 656 return hadit; 657 } 658 659 final boolean isHomeStack() { 660 return mStackId == HOME_STACK_ID; 661 } 662 663 final boolean isDockedStack() { 664 return mStackId == DOCKED_STACK_ID; 665 } 666 667 final boolean isPinnedStack() { 668 return mStackId == PINNED_STACK_ID; 669 } 670 671 final boolean isOnHomeDisplay() { 672 return isAttached() && 673 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 674 } 675 676 void moveToFront(String reason) { 677 moveToFront(reason, null); 678 } 679 680 /** 681 * @param reason The reason for moving the stack to the front. 682 * @param task If non-null, the task will be moved to the top of the stack. 683 * */ 684 void moveToFront(String reason, TaskRecord task) { 685 if (!isAttached()) { 686 return; 687 } 688 689 mStacks.remove(this); 690 int addIndex = mStacks.size(); 691 692 if (addIndex > 0) { 693 final ActivityStack topStack = mStacks.get(addIndex - 1); 694 if (StackId.isAlwaysOnTop(topStack.mStackId) && topStack != this) { 695 // If the top stack is always on top, we move this stack just below it. 696 addIndex--; 697 } 698 } 699 700 mStacks.add(addIndex, this); 701 702 // TODO(multi-display): Needs to also work if focus is moving to the non-home display. 703 if (isOnHomeDisplay()) { 704 mStackSupervisor.setFocusStackUnchecked(reason, this); 705 } 706 if (task != null) { 707 insertTaskAtTop(task, null); 708 } else { 709 task = topTask(); 710 } 711 if (task != null) { 712 mWindowManager.moveTaskToTop(task.taskId); 713 } 714 } 715 716 boolean isFocusable() { 717 if (StackId.canReceiveKeys(mStackId)) { 718 return true; 719 } 720 // The stack isn't focusable. See if its top activity is focusable to force focus on the 721 // stack. 722 final ActivityRecord r = topRunningActivityLocked(); 723 return r != null && r.isFocusable(); 724 } 725 726 final boolean isAttached() { 727 return mStacks != null; 728 } 729 730 /** 731 * Returns the top activity in any existing task matching the given Intent in the input result. 732 * Returns null if no such task is found. 733 */ 734 void findTaskLocked(ActivityRecord target, FindTaskResult result) { 735 Intent intent = target.intent; 736 ActivityInfo info = target.info; 737 ComponentName cls = intent.getComponent(); 738 if (info.targetActivity != null) { 739 cls = new ComponentName(info.packageName, info.targetActivity); 740 } 741 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 742 boolean isDocument = intent != null & intent.isDocument(); 743 // If documentData is non-null then it must match the existing task data. 744 Uri documentData = isDocument ? intent.getData() : null; 745 746 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Looking for task of " + target + " in " + this); 747 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 748 final TaskRecord task = mTaskHistory.get(taskNdx); 749 if (task.voiceSession != null) { 750 // We never match voice sessions; those always run independently. 751 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": voice session"); 752 continue; 753 } 754 if (task.userId != userId) { 755 // Looking for a different task. 756 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": different user"); 757 continue; 758 } 759 final ActivityRecord r = task.getTopActivity(); 760 if (r == null || r.finishing || r.userId != userId || 761 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 762 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch root " + r); 763 continue; 764 } 765 if (r.mActivityType != target.mActivityType) { 766 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch activity type"); 767 continue; 768 } 769 770 final Intent taskIntent = task.intent; 771 final Intent affinityIntent = task.affinityIntent; 772 final boolean taskIsDocument; 773 final Uri taskDocumentData; 774 if (taskIntent != null && taskIntent.isDocument()) { 775 taskIsDocument = true; 776 taskDocumentData = taskIntent.getData(); 777 } else if (affinityIntent != null && affinityIntent.isDocument()) { 778 taskIsDocument = true; 779 taskDocumentData = affinityIntent.getData(); 780 } else { 781 taskIsDocument = false; 782 taskDocumentData = null; 783 } 784 785 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Comparing existing cls=" 786 + taskIntent.getComponent().flattenToShortString() 787 + "/aff=" + r.task.rootAffinity + " to new cls=" 788 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 789 if (!isDocument && !taskIsDocument 790 && result.r == null && task.canMatchRootAffinity()) { 791 if (task.rootAffinity.equals(target.taskAffinity)) { 792 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching affinity candidate!"); 793 // It is possible for multiple tasks to have the same root affinity especially 794 // if they are in separate stacks. We save off this candidate, but keep looking 795 // to see if there is a better candidate. 796 result.r = r; 797 result.matchedByRootAffinity = true; 798 } 799 } else if (taskIntent != null && taskIntent.getComponent() != null && 800 taskIntent.getComponent().compareTo(cls) == 0 && 801 Objects.equals(documentData, taskDocumentData)) { 802 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); 803 //dump(); 804 if (DEBUG_TASKS) Slog.d(TAG_TASKS, 805 "For Intent " + intent + " bringing to top: " + r.intent); 806 result.r = r; 807 result.matchedByRootAffinity = false; 808 break; 809 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 810 affinityIntent.getComponent().compareTo(cls) == 0 && 811 Objects.equals(documentData, taskDocumentData)) { 812 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); 813 //dump(); 814 if (DEBUG_TASKS) Slog.d(TAG_TASKS, 815 "For Intent " + intent + " bringing to top: " + r.intent); 816 result.r = r; 817 result.matchedByRootAffinity = false; 818 break; 819 } else if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Not a match: " + task); 820 } 821 } 822 823 /** 824 * Returns the first activity (starting from the top of the stack) that 825 * is the same as the given activity. Returns null if no such activity 826 * is found. 827 */ 828 ActivityRecord findActivityLocked(Intent intent, ActivityInfo info) { 829 ComponentName cls = intent.getComponent(); 830 if (info.targetActivity != null) { 831 cls = new ComponentName(info.packageName, info.targetActivity); 832 } 833 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 834 835 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 836 final TaskRecord task = mTaskHistory.get(taskNdx); 837 final boolean notCurrentUserTask = 838 !mStackSupervisor.isCurrentProfileLocked(task.userId); 839 final ArrayList<ActivityRecord> activities = task.mActivities; 840 841 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 842 ActivityRecord r = activities.get(activityNdx); 843 if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) { 844 continue; 845 } 846 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 847 return r; 848 } 849 } 850 } 851 852 return null; 853 } 854 855 /* 856 * Move the activities around in the stack to bring a user to the foreground. 857 */ 858 final void switchUserLocked(int userId) { 859 if (mCurrentUser == userId) { 860 return; 861 } 862 mCurrentUser = userId; 863 864 // Move userId's tasks to the top. 865 int index = mTaskHistory.size(); 866 for (int i = 0; i < index; ) { 867 final TaskRecord task = mTaskHistory.get(i); 868 869 // NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is 870 // okay to show the activity when locked. 871 if (mStackSupervisor.isCurrentProfileLocked(task.userId) 872 || task.topRunningActivityLocked() != null) { 873 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() + 874 " moving " + task + " to top"); 875 mTaskHistory.remove(i); 876 mTaskHistory.add(task); 877 --index; 878 // Use same value for i. 879 } else { 880 ++i; 881 } 882 } 883 if (VALIDATE_TOKENS) { 884 validateAppTokensLocked(); 885 } 886 } 887 888 void minimalResumeActivityLocked(ActivityRecord r) { 889 r.state = ActivityState.RESUMED; 890 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + r + " (starting new instance)" 891 + " callers=" + Debug.getCallers(5)); 892 mResumedActivity = r; 893 r.task.touchActiveTime(); 894 mRecentTasks.addLocked(r.task); 895 completeResumeLocked(r); 896 mStackSupervisor.checkReadyForSleepLocked(); 897 setLaunchTime(r); 898 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 899 "Launch completed; removing icicle of " + r.icicle); 900 } 901 902 void addRecentActivityLocked(ActivityRecord r) { 903 if (r != null) { 904 mRecentTasks.addLocked(r.task); 905 r.task.touchActiveTime(); 906 } 907 } 908 909 private void startLaunchTraces(String packageName) { 910 if (mFullyDrawnStartTime != 0) { 911 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 912 } 913 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0); 914 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 915 } 916 917 private void stopFullyDrawnTraceIfNeeded() { 918 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 919 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 920 mFullyDrawnStartTime = 0; 921 } 922 } 923 924 void setLaunchTime(ActivityRecord r) { 925 if (r.displayStartTime == 0) { 926 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 927 if (r.task != null) { 928 r.task.isLaunching = true; 929 } 930 if (mLaunchStartTime == 0) { 931 startLaunchTraces(r.packageName); 932 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 933 } 934 } else if (mLaunchStartTime == 0) { 935 startLaunchTraces(r.packageName); 936 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 937 } 938 } 939 940 void clearLaunchTime(ActivityRecord r) { 941 // Make sure that there is no activity waiting for this to launch. 942 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 943 r.displayStartTime = r.fullyDrawnStartTime = 0; 944 if (r.task != null) { 945 r.task.isLaunching = false; 946 } 947 } else { 948 mStackSupervisor.removeTimeoutsForActivityLocked(r); 949 mStackSupervisor.scheduleIdleTimeoutLocked(r); 950 } 951 } 952 953 void awakeFromSleepingLocked() { 954 // Ensure activities are no longer sleeping. 955 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 956 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 957 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 958 activities.get(activityNdx).setSleeping(false); 959 } 960 } 961 if (mPausingActivity != null) { 962 Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); 963 activityPausedLocked(mPausingActivity.appToken, true); 964 } 965 } 966 967 void updateActivityApplicationInfoLocked(ApplicationInfo aInfo) { 968 final String packageName = aInfo.packageName; 969 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 970 final List<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 971 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 972 if (packageName.equals(activities.get(activityNdx).packageName)) { 973 activities.get(activityNdx).info.applicationInfo = aInfo; 974 } 975 } 976 } 977 } 978 979 /** 980 * @return true if something must be done before going to sleep. 981 */ 982 boolean checkReadyForSleepLocked() { 983 if (mResumedActivity != null) { 984 // Still have something resumed; can't sleep until it is paused. 985 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity); 986 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 987 "Sleep => pause with userLeaving=false"); 988 startPausingLocked(false, true, false, false); 989 return true; 990 } 991 if (mPausingActivity != null) { 992 // Still waiting for something to pause; can't sleep yet. 993 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity); 994 return true; 995 } 996 997 if (hasVisibleBehindActivity()) { 998 // Stop visible behind activity before going to sleep. 999 final ActivityRecord r = getVisibleBehindActivity(); 1000 mStackSupervisor.mStoppingActivities.add(r); 1001 if (DEBUG_STATES) Slog.v(TAG_STATES, "Sleep still waiting to stop visible behind " + r); 1002 return true; 1003 } 1004 1005 return false; 1006 } 1007 1008 void goToSleep() { 1009 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1010 1011 // Make sure any paused or stopped but visible activities are now sleeping. 1012 // This ensures that the activity's onStop() is called. 1013 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1014 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1015 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1016 final ActivityRecord r = activities.get(activityNdx); 1017 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED 1018 || r.state == ActivityState.PAUSED || r.state == ActivityState.PAUSING) { 1019 r.setSleeping(true); 1020 } 1021 } 1022 } 1023 } 1024 1025 public final Bitmap screenshotActivitiesLocked(ActivityRecord who) { 1026 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivitiesLocked: " + who); 1027 if (who.noDisplay) { 1028 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display"); 1029 return null; 1030 } 1031 1032 if (isHomeStack()) { 1033 // This is an optimization -- since we never show Home or Recents within Recents itself, 1034 // we can just go ahead and skip taking the screenshot if this is the home stack. 1035 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack"); 1036 return null; 1037 } 1038 1039 int w = mService.mThumbnailWidth; 1040 int h = mService.mThumbnailHeight; 1041 float scale = 1f; 1042 if (w > 0) { 1043 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot"); 1044 1045 // When this flag is set, we currently take the fullscreen screenshot of the activity 1046 // but scaled to half the size. This gives us a "good-enough" fullscreen thumbnail to 1047 // use within SystemUI while keeping memory usage low. 1048 if (ActivityManagerService.TAKE_FULLSCREEN_SCREENSHOTS) { 1049 w = h = -1; 1050 scale = mService.mFullscreenThumbnailScale; 1051 } 1052 return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, 1053 w, h, scale); 1054 } 1055 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 1056 return null; 1057 } 1058 1059 /** 1060 * Start pausing the currently resumed activity. It is an error to call this if there 1061 * is already an activity being paused or there is no resumed activity. 1062 * 1063 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 1064 * @param uiSleeping True if this is happening with the user interface going to sleep (the 1065 * screen turning off). 1066 * @param resuming True if this is being called as part of resuming the top activity, so 1067 * we shouldn't try to instigate a resume here. 1068 * @param dontWait True if the caller does not want to wait for the pause to complete. If 1069 * set to true, we will immediately complete the pause here before returning. 1070 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 1071 * it to tell us when it is done. 1072 */ 1073 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 1074 boolean dontWait) { 1075 if (mPausingActivity != null) { 1076 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity 1077 + " state=" + mPausingActivity.state); 1078 if (!mService.isSleeping()) { 1079 // Avoid recursion among check for sleep and complete pause during sleeping. 1080 // Because activity will be paused immediately after resume, just let pause 1081 // be completed by the order of activity paused from clients. 1082 completePauseLocked(false); 1083 } 1084 } 1085 ActivityRecord prev = mResumedActivity; 1086 if (prev == null) { 1087 if (!resuming) { 1088 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 1089 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1090 } 1091 return false; 1092 } 1093 1094 if (mActivityContainer.mParentActivity == null) { 1095 // Top level stack, not a child. Look for child stacks. 1096 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 1097 } 1098 1099 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev); 1100 else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev); 1101 mResumedActivity = null; 1102 mPausingActivity = prev; 1103 mLastPausedActivity = prev; 1104 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 1105 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 1106 prev.state = ActivityState.PAUSING; 1107 prev.task.touchActiveTime(); 1108 clearLaunchTime(prev); 1109 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 1110 if (mService.mHasRecents 1111 && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 1112 prev.mUpdateTaskThumbnailWhenHidden = true; 1113 } 1114 stopFullyDrawnTraceIfNeeded(); 1115 1116 mService.updateCpuStats(); 1117 1118 if (prev.app != null && prev.app.thread != null) { 1119 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev); 1120 try { 1121 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 1122 prev.userId, System.identityHashCode(prev), 1123 prev.shortComponentName); 1124 mService.updateUsageStats(prev, false); 1125 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 1126 userLeaving, prev.configChangeFlags, dontWait); 1127 } catch (Exception e) { 1128 // Ignore exception, if process died other code will cleanup. 1129 Slog.w(TAG, "Exception thrown during pause", e); 1130 mPausingActivity = null; 1131 mLastPausedActivity = null; 1132 mLastNoHistoryActivity = null; 1133 } 1134 } else { 1135 mPausingActivity = null; 1136 mLastPausedActivity = null; 1137 mLastNoHistoryActivity = null; 1138 } 1139 1140 // If we are not going to sleep, we want to ensure the device is 1141 // awake until the next activity is started. 1142 if (!uiSleeping && !mService.isSleepingOrShuttingDown()) { 1143 mStackSupervisor.acquireLaunchWakelock(); 1144 } 1145 1146 if (mPausingActivity != null) { 1147 // Have the window manager pause its key dispatching until the new 1148 // activity has started. If we're pausing the activity just because 1149 // the screen is being turned off and the UI is sleeping, don't interrupt 1150 // key dispatch; the same activity will pick it up again on wakeup. 1151 if (!uiSleeping) { 1152 prev.pauseKeyDispatchingLocked(); 1153 } else if (DEBUG_PAUSE) { 1154 Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off"); 1155 } 1156 1157 if (dontWait) { 1158 // If the caller said they don't want to wait for the pause, then complete 1159 // the pause now. 1160 completePauseLocked(false); 1161 return false; 1162 1163 } else { 1164 // Schedule a pause timeout in case the app doesn't respond. 1165 // We don't give it much time because this directly impacts the 1166 // responsiveness seen by the user. 1167 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 1168 msg.obj = prev; 1169 prev.pauseTime = SystemClock.uptimeMillis(); 1170 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 1171 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete..."); 1172 return true; 1173 } 1174 1175 } else { 1176 // This activity failed to schedule the 1177 // pause, so just treat it as being paused now. 1178 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next."); 1179 if (!resuming) { 1180 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1181 } 1182 return false; 1183 } 1184 } 1185 1186 final void activityPausedLocked(IBinder token, boolean timeout) { 1187 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1188 "Activity paused: token=" + token + ", timeout=" + timeout); 1189 1190 final ActivityRecord r = isInStackLocked(token); 1191 if (r != null) { 1192 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 1193 if (mPausingActivity == r) { 1194 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r 1195 + (timeout ? " (due to timeout)" : " (pause complete)")); 1196 completePauseLocked(true); 1197 return; 1198 } else { 1199 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 1200 r.userId, System.identityHashCode(r), r.shortComponentName, 1201 mPausingActivity != null 1202 ? mPausingActivity.shortComponentName : "(none)"); 1203 if (r.state == ActivityState.PAUSING) { 1204 r.state = ActivityState.PAUSED; 1205 if (r.finishing) { 1206 if (DEBUG_PAUSE) Slog.v(TAG, 1207 "Executing finish of failed to pause activity: " + r); 1208 finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false); 1209 } 1210 } 1211 } 1212 } 1213 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1214 } 1215 1216 final void activityResumedLocked(IBinder token) { 1217 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 1218 if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r); 1219 r.icicle = null; 1220 r.haveState = false; 1221 } 1222 1223 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 1224 PersistableBundle persistentState, CharSequence description) { 1225 if (r.state != ActivityState.STOPPING) { 1226 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 1227 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1228 return; 1229 } 1230 if (persistentState != null) { 1231 r.persistentState = persistentState; 1232 mService.notifyTaskPersisterLocked(r.task, false); 1233 } 1234 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle); 1235 if (icicle != null) { 1236 // If icicle is null, this is happening due to a timeout, so we 1237 // haven't really saved the state. 1238 r.icicle = icicle; 1239 r.haveState = true; 1240 r.launchCount = 0; 1241 r.updateThumbnailLocked(null, description); 1242 } 1243 if (!r.stopped) { 1244 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)"); 1245 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1246 r.stopped = true; 1247 r.state = ActivityState.STOPPED; 1248 1249 mWindowManager.notifyAppStopped(r.appToken, true); 1250 1251 if (getVisibleBehindActivity() == r) { 1252 mStackSupervisor.requestVisibleBehindLocked(r, false); 1253 } 1254 if (r.finishing) { 1255 r.clearOptionsLocked(); 1256 } else { 1257 if (r.deferRelaunchUntilPaused) { 1258 destroyActivityLocked(r, true, "stop-config"); 1259 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1260 } else { 1261 mStackSupervisor.updatePreviousProcessLocked(r); 1262 } 1263 } 1264 } 1265 } 1266 1267 private void completePauseLocked(boolean resumeNext) { 1268 ActivityRecord prev = mPausingActivity; 1269 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev); 1270 1271 if (prev != null) { 1272 final boolean wasStopping = prev.state == ActivityState.STOPPING; 1273 prev.state = ActivityState.PAUSED; 1274 if (prev.finishing) { 1275 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev); 1276 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 1277 } else if (prev.app != null) { 1278 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueue pending stop if needed: " + prev 1279 + " wasStopping=" + wasStopping + " visible=" + prev.visible); 1280 if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { 1281 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1282 "Complete pause, no longer waiting: " + prev); 1283 } 1284 if (prev.deferRelaunchUntilPaused) { 1285 // Complete the deferred relaunch that was waiting for pause to complete. 1286 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Re-launching after pause: " + prev); 1287 relaunchActivityLocked(prev, prev.configChangeFlags, false, 1288 prev.preserveWindowOnDeferredRelaunch); 1289 } else if (wasStopping) { 1290 // We are also stopping, the stop request must have gone soon after the pause. 1291 // We can't clobber it, because the stop confirmation will not be handled. 1292 // We don't need to schedule another stop, we only need to let it happen. 1293 prev.state = ActivityState.STOPPING; 1294 } else if ((!prev.visible && !hasVisibleBehindActivity()) 1295 || mService.isSleepingOrShuttingDown()) { 1296 // If we were visible then resumeTopActivities will release resources before 1297 // stopping. 1298 addToStopping(prev, true /* immediate */); 1299 } 1300 } else { 1301 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev); 1302 prev = null; 1303 } 1304 // It is possible the activity was freezing the screen before it was paused. 1305 // In that case go ahead and remove the freeze this activity has on the screen 1306 // since it is no longer visible. 1307 prev.stopFreezingScreenLocked(true /*force*/); 1308 mPausingActivity = null; 1309 } 1310 1311 if (resumeNext) { 1312 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1313 if (!mService.isSleepingOrShuttingDown()) { 1314 mStackSupervisor.resumeFocusedStackTopActivityLocked(topStack, prev, null); 1315 } else { 1316 mStackSupervisor.checkReadyForSleepLocked(); 1317 ActivityRecord top = topStack.topRunningActivityLocked(); 1318 if (top == null || (prev != null && top != prev)) { 1319 // If there are no more activities available to run, do resume anyway to start 1320 // something. Also if the top activity on the stack is not the just paused 1321 // activity, we need to go ahead and resume it to ensure we complete an 1322 // in-flight app switch. 1323 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1324 } 1325 } 1326 } 1327 1328 if (prev != null) { 1329 prev.resumeKeyDispatchingLocked(); 1330 1331 if (prev.app != null && prev.cpuTimeAtResume > 0 1332 && mService.mBatteryStatsService.isOnBattery()) { 1333 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1334 - prev.cpuTimeAtResume; 1335 if (diff > 0) { 1336 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1337 synchronized (bsi) { 1338 BatteryStatsImpl.Uid.Proc ps = 1339 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1340 prev.info.packageName); 1341 if (ps != null) { 1342 ps.addForegroundTimeLocked(diff); 1343 } 1344 } 1345 } 1346 } 1347 prev.cpuTimeAtResume = 0; // reset it 1348 } 1349 1350 // Notify when the task stack has changed, but only if visibilities changed (not just focus) 1351 if (mStackSupervisor.mAppVisibilitiesChangedSinceLastPause) { 1352 mService.notifyTaskStackChangedLocked(); 1353 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = false; 1354 } 1355 1356 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1357 } 1358 1359 private void addToStopping(ActivityRecord r, boolean immediate) { 1360 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1361 mStackSupervisor.mStoppingActivities.add(r); 1362 } 1363 1364 // If we already have a few activities waiting to stop, then give up 1365 // on things going idle and start clearing them out. Or if r is the 1366 // last of activity of the last task the stack will be empty and must 1367 // be cleared immediately. 1368 boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE 1369 || (r.frontOfTask && mTaskHistory.size() <= 1); 1370 1371 if (immediate || forceIdle) { 1372 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle=" 1373 + forceIdle + "immediate=" + immediate); 1374 mStackSupervisor.scheduleIdleLocked(); 1375 } else { 1376 mStackSupervisor.checkReadyForSleepLocked(); 1377 } 1378 } 1379 1380 /** 1381 * Once we know that we have asked an application to put an activity in 1382 * the resumed state (either by launching it or explicitly telling it), 1383 * this function updates the rest of our state to match that fact. 1384 */ 1385 private void completeResumeLocked(ActivityRecord next) { 1386 next.visible = true; 1387 next.idle = false; 1388 next.results = null; 1389 next.newIntents = null; 1390 next.stopped = false; 1391 1392 if (next.isHomeActivity()) { 1393 ProcessRecord app = next.task.mActivities.get(0).app; 1394 if (app != null && app != mService.mHomeProcess) { 1395 mService.mHomeProcess = app; 1396 } 1397 } 1398 1399 if (next.nowVisible) { 1400 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1401 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1402 } 1403 1404 // schedule an idle timeout in case the app doesn't do it for us. 1405 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1406 1407 mStackSupervisor.reportResumedActivityLocked(next); 1408 1409 next.resumeKeyDispatchingLocked(); 1410 mNoAnimActivities.clear(); 1411 1412 // Mark the point when the activity is resuming 1413 // TODO: To be more accurate, the mark should be before the onCreate, 1414 // not after the onResume. But for subsequent starts, onResume is fine. 1415 if (next.app != null) { 1416 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1417 } else { 1418 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1419 } 1420 1421 next.returningOptions = null; 1422 1423 if (getVisibleBehindActivity() == next) { 1424 // When resuming an activity, require it to call requestVisibleBehind() again. 1425 setVisibleBehindActivity(null); 1426 } 1427 } 1428 1429 private void setVisible(ActivityRecord r, boolean visible) { 1430 r.visible = visible; 1431 if (!visible && r.mUpdateTaskThumbnailWhenHidden) { 1432 r.updateThumbnailLocked(r.task.stack.screenshotActivitiesLocked(r), null); 1433 r.mUpdateTaskThumbnailWhenHidden = false; 1434 } 1435 mWindowManager.setAppVisibility(r.appToken, visible); 1436 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1437 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1438 ActivityContainer container = containers.get(containerNdx); 1439 container.setVisible(visible); 1440 } 1441 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true; 1442 } 1443 1444 // Find the first visible activity above the passed activity and if it is translucent return it 1445 // otherwise return null; 1446 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1447 TaskRecord task = r.task; 1448 if (task == null) { 1449 return null; 1450 } 1451 1452 ActivityStack stack = task.stack; 1453 if (stack == null) { 1454 return null; 1455 } 1456 1457 int stackNdx = mStacks.indexOf(stack); 1458 1459 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1460 int taskNdx = tasks.indexOf(task); 1461 1462 ArrayList<ActivityRecord> activities = task.mActivities; 1463 int activityNdx = activities.indexOf(r) + 1; 1464 1465 final int numStacks = mStacks.size(); 1466 while (stackNdx < numStacks) { 1467 final ActivityStack historyStack = mStacks.get(stackNdx); 1468 tasks = historyStack.mTaskHistory; 1469 final int numTasks = tasks.size(); 1470 while (taskNdx < numTasks) { 1471 final TaskRecord currentTask = tasks.get(taskNdx); 1472 activities = currentTask.mActivities; 1473 final int numActivities = activities.size(); 1474 while (activityNdx < numActivities) { 1475 final ActivityRecord activity = activities.get(activityNdx); 1476 if (!activity.finishing) { 1477 return historyStack.mFullscreen 1478 && currentTask.mFullscreen && activity.fullscreen ? null : activity; 1479 } 1480 ++activityNdx; 1481 } 1482 activityNdx = 0; 1483 ++taskNdx; 1484 } 1485 taskNdx = 0; 1486 ++stackNdx; 1487 } 1488 1489 return null; 1490 } 1491 1492 ActivityStack getNextFocusableStackLocked() { 1493 ArrayList<ActivityStack> stacks = mStacks; 1494 final ActivityRecord parent = mActivityContainer.mParentActivity; 1495 if (parent != null) { 1496 stacks = parent.task.stack.mStacks; 1497 } 1498 if (stacks != null) { 1499 for (int i = stacks.size() - 1; i >= 0; --i) { 1500 ActivityStack stack = stacks.get(i); 1501 if (stack != this && stack.isFocusable() 1502 && stack.getStackVisibilityLocked(null) != STACK_INVISIBLE) { 1503 return stack; 1504 } 1505 } 1506 } 1507 return null; 1508 } 1509 1510 /** Returns true if the stack contains a fullscreen task. */ 1511 private boolean hasFullscreenTask() { 1512 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 1513 final TaskRecord task = mTaskHistory.get(i); 1514 if (task.mFullscreen) { 1515 return true; 1516 } 1517 } 1518 return false; 1519 } 1520 1521 /** 1522 * Returns true if the stack is translucent and can have other contents visible behind it if 1523 * needed. A stack is considered translucent if it don't contain a visible or 1524 * starting (about to be visible) activity that is fullscreen (opaque). 1525 * @param starting The currently starting activity or null if there is none. 1526 * @param stackBehindId The id of the stack directly behind this one. 1527 */ 1528 private boolean isStackTranslucent(ActivityRecord starting, int stackBehindId) { 1529 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1530 final TaskRecord task = mTaskHistory.get(taskNdx); 1531 final ArrayList<ActivityRecord> activities = task.mActivities; 1532 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1533 final ActivityRecord r = activities.get(activityNdx); 1534 1535 if (r.finishing) { 1536 // We don't factor in finishing activities when determining translucency since 1537 // they will be gone soon. 1538 continue; 1539 } 1540 1541 if (!r.visible && r != starting) { 1542 // Also ignore invisible activities that are not the currently starting 1543 // activity (about to be visible). 1544 continue; 1545 } 1546 1547 if (r.fullscreen) { 1548 // Stack isn't translucent if it has at least one fullscreen activity 1549 // that is visible. 1550 return false; 1551 } 1552 1553 if (!isHomeStack() && r.frontOfTask 1554 && task.isOverHomeStack() && stackBehindId != HOME_STACK_ID) { 1555 // Stack isn't translucent if it's top activity should have the home stack 1556 // behind it and the stack currently behind it isn't the home stack. 1557 return false; 1558 } 1559 } 1560 } 1561 return true; 1562 } 1563 1564 /** 1565 * Returns stack's visibility: {@link #STACK_INVISIBLE}, {@link #STACK_VISIBLE} or 1566 * {@link #STACK_VISIBLE_ACTIVITY_BEHIND}. 1567 * @param starting The currently starting activity or null if there is none. 1568 */ 1569 int getStackVisibilityLocked(ActivityRecord starting) { 1570 if (!isAttached()) { 1571 return STACK_INVISIBLE; 1572 } 1573 1574 if (mStackSupervisor.isFrontStack(this) || mStackSupervisor.isFocusedStack(this)) { 1575 return STACK_VISIBLE; 1576 } 1577 1578 final int stackIndex = mStacks.indexOf(this); 1579 1580 if (stackIndex == mStacks.size() - 1) { 1581 Slog.wtf(TAG, 1582 "Stack=" + this + " isn't front stack but is at the top of the stack list"); 1583 return STACK_INVISIBLE; 1584 } 1585 1586 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 1587 if (isLockscreenShown && !StackId.isAllowedOverLockscreen(mStackId)) { 1588 return STACK_INVISIBLE; 1589 } 1590 1591 final ActivityStack focusedStack = mStackSupervisor.getFocusedStack(); 1592 final int focusedStackId = focusedStack.mStackId; 1593 1594 if (mStackId == FULLSCREEN_WORKSPACE_STACK_ID 1595 && hasVisibleBehindActivity() && focusedStackId == HOME_STACK_ID 1596 && !focusedStack.topActivity().fullscreen) { 1597 // The fullscreen stack should be visible if it has a visible behind activity behind 1598 // the home stack that is translucent. 1599 return STACK_VISIBLE_ACTIVITY_BEHIND; 1600 } 1601 1602 if (mStackId == DOCKED_STACK_ID) { 1603 // Docked stack is always visible, except in the case where the top running activity 1604 // task in the focus stack doesn't support any form of resizing but we show it for the 1605 // home task even though it's not resizable. 1606 final ActivityRecord r = focusedStack.topRunningActivityLocked(); 1607 final TaskRecord task = r != null ? r.task : null; 1608 return task == null || task.canGoInDockedStack() || task.isHomeTask() ? STACK_VISIBLE 1609 : STACK_INVISIBLE; 1610 } 1611 1612 // Find the first stack behind focused stack that actually got something visible. 1613 int stackBehindFocusedIndex = mStacks.indexOf(focusedStack) - 1; 1614 while (stackBehindFocusedIndex >= 0 && 1615 mStacks.get(stackBehindFocusedIndex).topRunningActivityLocked() == null) { 1616 stackBehindFocusedIndex--; 1617 } 1618 if ((focusedStackId == DOCKED_STACK_ID || focusedStackId == PINNED_STACK_ID) 1619 && stackIndex == stackBehindFocusedIndex) { 1620 // Stacks directly behind the docked or pinned stack are always visible. 1621 return STACK_VISIBLE; 1622 } 1623 1624 final int stackBehindFocusedId = (stackBehindFocusedIndex >= 0) 1625 ? mStacks.get(stackBehindFocusedIndex).mStackId : INVALID_STACK_ID; 1626 1627 if (focusedStackId == FULLSCREEN_WORKSPACE_STACK_ID 1628 && focusedStack.isStackTranslucent(starting, stackBehindFocusedId)) { 1629 // Stacks behind the fullscreen stack with a translucent activity are always 1630 // visible so they can act as a backdrop to the translucent activity. 1631 // For example, dialog activities 1632 if (stackIndex == stackBehindFocusedIndex) { 1633 return STACK_VISIBLE; 1634 } 1635 if (stackBehindFocusedIndex >= 0) { 1636 if ((stackBehindFocusedId == DOCKED_STACK_ID 1637 || stackBehindFocusedId == PINNED_STACK_ID) 1638 && stackIndex == (stackBehindFocusedIndex - 1)) { 1639 // The stack behind the docked or pinned stack is also visible so we can have a 1640 // complete backdrop to the translucent activity when the docked stack is up. 1641 return STACK_VISIBLE; 1642 } 1643 } 1644 } 1645 1646 if (StackId.isStaticStack(mStackId)) { 1647 // Visibility of any static stack should have been determined by the conditions above. 1648 return STACK_INVISIBLE; 1649 } 1650 1651 for (int i = stackIndex + 1; i < mStacks.size(); i++) { 1652 final ActivityStack stack = mStacks.get(i); 1653 1654 if (!stack.mFullscreen && !stack.hasFullscreenTask()) { 1655 continue; 1656 } 1657 1658 if (!StackId.isDynamicStacksVisibleBehindAllowed(stack.mStackId)) { 1659 // These stacks can't have any dynamic stacks visible behind them. 1660 return STACK_INVISIBLE; 1661 } 1662 1663 if (!stack.isStackTranslucent(starting, INVALID_STACK_ID)) { 1664 return STACK_INVISIBLE; 1665 } 1666 } 1667 1668 return STACK_VISIBLE; 1669 } 1670 1671 final int rankTaskLayers(int baseLayer) { 1672 int layer = 0; 1673 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1674 final TaskRecord task = mTaskHistory.get(taskNdx); 1675 ActivityRecord r = task.topRunningActivityLocked(); 1676 if (r == null || r.finishing || !r.visible) { 1677 task.mLayerRank = -1; 1678 } else { 1679 task.mLayerRank = baseLayer + layer++; 1680 } 1681 } 1682 return layer; 1683 } 1684 1685 /** 1686 * Make sure that all activities that need to be visible (that is, they 1687 * currently can be seen by the user) actually are. 1688 */ 1689 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges, 1690 boolean preserveWindows) { 1691 ActivityRecord top = topRunningActivityLocked(); 1692 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "ensureActivitiesVisible behind " + top 1693 + " configChanges=0x" + Integer.toHexString(configChanges)); 1694 if (top != null) { 1695 checkTranslucentActivityWaiting(top); 1696 } 1697 1698 // If the top activity is not fullscreen, then we need to 1699 // make sure any activities under it are now visible. 1700 boolean aboveTop = top != null; 1701 final int stackVisibility = getStackVisibilityLocked(starting); 1702 final boolean stackInvisible = stackVisibility != STACK_VISIBLE; 1703 final boolean stackVisibleBehind = stackVisibility == STACK_VISIBLE_ACTIVITY_BEHIND; 1704 boolean behindFullscreenActivity = stackInvisible; 1705 boolean resumeNextActivity = isFocusable() && (isInStackLocked(starting) == null); 1706 boolean behindTranslucentActivity = false; 1707 final ActivityRecord visibleBehind = getVisibleBehindActivity(); 1708 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1709 final TaskRecord task = mTaskHistory.get(taskNdx); 1710 final ArrayList<ActivityRecord> activities = task.mActivities; 1711 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1712 final ActivityRecord r = activities.get(activityNdx); 1713 if (r.finishing) { 1714 // Normally the screenshot will be taken in makeInvisible(). When an activity 1715 // is finishing, we no longer change its visibility, but we still need to take 1716 // the screenshots if startPausingLocked decided it should be taken. 1717 if (r.mUpdateTaskThumbnailWhenHidden) { 1718 r.updateThumbnailLocked(screenshotActivitiesLocked(r), null); 1719 r.mUpdateTaskThumbnailWhenHidden = false; 1720 } 1721 continue; 1722 } 1723 final boolean isTop = r == top; 1724 if (aboveTop && !isTop) { 1725 continue; 1726 } 1727 aboveTop = false; 1728 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1729 // but must be drawn initially for the animation as though they were visible. 1730 final boolean activityVisibleBehind = 1731 (behindTranslucentActivity || stackVisibleBehind) && visibleBehind == r; 1732 final boolean isVisible = (!behindFullscreenActivity || r.mLaunchTaskBehind 1733 || activityVisibleBehind) && okToShowLocked(r); 1734 if (isVisible) { 1735 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make visible? " + r 1736 + " finishing=" + r.finishing + " state=" + r.state); 1737 // First: if this is not the current activity being started, make 1738 // sure it matches the current configuration. 1739 if (r != starting) { 1740 ensureActivityConfigurationLocked(r, 0, preserveWindows); 1741 } 1742 1743 if (r.app == null || r.app.thread == null) { 1744 if (makeVisibleAndRestartIfNeeded(starting, configChanges, isTop, 1745 resumeNextActivity, r)) { 1746 if (activityNdx >= activities.size()) { 1747 // Record may be removed if its process needs to restart. 1748 activityNdx = activities.size() - 1; 1749 } else { 1750 resumeNextActivity = false; 1751 } 1752 } 1753 } else if (r.visible) { 1754 // If this activity is already visible, then there is nothing to do here. 1755 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1756 "Skipping: already visible at " + r); 1757 1758 if (handleAlreadyVisible(r)) { 1759 resumeNextActivity = false; 1760 } 1761 } else { 1762 makeVisibleIfNeeded(starting, r); 1763 } 1764 // Aggregate current change flags. 1765 configChanges |= r.configChangeFlags; 1766 behindFullscreenActivity = updateBehindFullscreen(stackInvisible, 1767 behindFullscreenActivity, task, r); 1768 if (behindFullscreenActivity && !r.fullscreen) { 1769 behindTranslucentActivity = true; 1770 } 1771 } else { 1772 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make invisible? " + r 1773 + " finishing=" + r.finishing + " state=" + r.state + " stackInvisible=" 1774 + stackInvisible + " behindFullscreenActivity=" 1775 + behindFullscreenActivity + " mLaunchTaskBehind=" 1776 + r.mLaunchTaskBehind); 1777 makeInvisible(r, visibleBehind); 1778 } 1779 } 1780 if (mStackId == FREEFORM_WORKSPACE_STACK_ID) { 1781 // The visibility of tasks and the activities they contain in freeform stack are 1782 // determined individually unlike other stacks where the visibility or fullscreen 1783 // status of an activity in a previous task affects other. 1784 behindFullscreenActivity = stackVisibility == STACK_INVISIBLE; 1785 } else if (mStackId == HOME_STACK_ID) { 1786 if (task.isHomeTask()) { 1787 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Home task: at " + task 1788 + " stackInvisible=" + stackInvisible 1789 + " behindFullscreenActivity=" + behindFullscreenActivity); 1790 // No other task in the home stack should be visible behind the home activity. 1791 // Home activities is usually a translucent activity with the wallpaper behind 1792 // them. However, when they don't have the wallpaper behind them, we want to 1793 // show activities in the next application stack behind them vs. another 1794 // task in the home stack like recents. 1795 behindFullscreenActivity = true; 1796 } else if (task.isRecentsTask() 1797 && task.getTaskToReturnTo() == APPLICATION_ACTIVITY_TYPE) { 1798 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1799 "Recents task returning to app: at " + task 1800 + " stackInvisible=" + stackInvisible 1801 + " behindFullscreenActivity=" + behindFullscreenActivity); 1802 // We don't want any other tasks in the home stack visible if the recents 1803 // activity is going to be returning to an application activity type. 1804 // We do this to preserve the visible order the user used to get into the 1805 // recents activity. The recents activity is normally translucent and if it 1806 // doesn't have the wallpaper behind it the next activity in the home stack 1807 // shouldn't be visible when the home stack is brought to the front to display 1808 // the recents activity from an app. 1809 behindFullscreenActivity = true; 1810 } 1811 1812 } 1813 } 1814 1815 if (mTranslucentActivityWaiting != null && 1816 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1817 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1818 notifyActivityDrawnLocked(null); 1819 } 1820 } 1821 1822 private void checkTranslucentActivityWaiting(ActivityRecord top) { 1823 if (mTranslucentActivityWaiting != top) { 1824 mUndrawnActivitiesBelowTopTranslucent.clear(); 1825 if (mTranslucentActivityWaiting != null) { 1826 // Call the callback with a timeout indication. 1827 notifyActivityDrawnLocked(null); 1828 mTranslucentActivityWaiting = null; 1829 } 1830 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1831 } 1832 } 1833 1834 private boolean makeVisibleAndRestartIfNeeded(ActivityRecord starting, int configChanges, 1835 boolean isTop, boolean andResume, ActivityRecord r) { 1836 // We need to make sure the app is running if it's the top, or it is just made visible from 1837 // invisible. If the app is already visible, it must have died while it was visible. In this 1838 // case, we'll show the dead window but will not restart the app. Otherwise we could end up 1839 // thrashing. 1840 if (isTop || !r.visible) { 1841 // This activity needs to be visible, but isn't even running... 1842 // get it started and resume if no other stack in this stack is resumed. 1843 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Start and freeze screen for " + r); 1844 if (r != starting) { 1845 r.startFreezingScreenLocked(r.app, configChanges); 1846 } 1847 if (!r.visible || r.mLaunchTaskBehind) { 1848 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Starting and making visible: " + r); 1849 setVisible(r, true); 1850 } 1851 if (r != starting) { 1852 mStackSupervisor.startSpecificActivityLocked(r, andResume, false); 1853 return true; 1854 } 1855 } 1856 return false; 1857 } 1858 1859 private void makeInvisible(ActivityRecord r, ActivityRecord visibleBehind) { 1860 if (!r.visible) { 1861 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r); 1862 return; 1863 } 1864 // Now for any activities that aren't visible to the user, make sure they no longer are 1865 // keeping the screen frozen. 1866 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r + " " + r.state); 1867 try { 1868 setVisible(r, false); 1869 switch (r.state) { 1870 case STOPPING: 1871 case STOPPED: 1872 if (r.app != null && r.app.thread != null) { 1873 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1874 "Scheduling invisibility: " + r); 1875 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1876 } 1877 break; 1878 1879 case INITIALIZING: 1880 case RESUMED: 1881 case PAUSING: 1882 case PAUSED: 1883 // This case created for transitioning activities from 1884 // translucent to opaque {@link Activity#convertToOpaque}. 1885 if (visibleBehind == r) { 1886 releaseBackgroundResources(r); 1887 } else { 1888 addToStopping(r, true /* immediate */); 1889 } 1890 break; 1891 1892 default: 1893 break; 1894 } 1895 } catch (Exception e) { 1896 // Just skip on any failure; we'll make it visible when it next restarts. 1897 Slog.w(TAG, "Exception thrown making hidden: " + r.intent.getComponent(), e); 1898 } 1899 } 1900 1901 private boolean updateBehindFullscreen(boolean stackInvisible, boolean behindFullscreenActivity, 1902 TaskRecord task, ActivityRecord r) { 1903 if (r.fullscreen) { 1904 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r 1905 + " stackInvisible=" + stackInvisible 1906 + " behindFullscreenActivity=" + behindFullscreenActivity); 1907 // At this point, nothing else needs to be shown in this task. 1908 behindFullscreenActivity = true; 1909 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1910 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r 1911 + " stackInvisible=" + stackInvisible 1912 + " behindFullscreenActivity=" + behindFullscreenActivity); 1913 behindFullscreenActivity = true; 1914 } 1915 return behindFullscreenActivity; 1916 } 1917 1918 private void makeVisibleIfNeeded(ActivityRecord starting, ActivityRecord r) { 1919 1920 // This activity is not currently visible, but is running. Tell it to become visible. 1921 if (r.state == ActivityState.RESUMED || r == starting) { 1922 if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY, 1923 "Not making visible, r=" + r + " state=" + r.state + " starting=" + starting); 1924 return; 1925 } 1926 1927 // If this activity is paused, tell it to now show its window. 1928 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1929 "Making visible and scheduling visibility: " + r); 1930 try { 1931 if (mTranslucentActivityWaiting != null) { 1932 r.updateOptionsLocked(r.returningOptions); 1933 mUndrawnActivitiesBelowTopTranslucent.add(r); 1934 } 1935 setVisible(r, true); 1936 r.sleeping = false; 1937 r.app.pendingUiClean = true; 1938 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1939 // The activity may be waiting for stop, but that is no longer 1940 // appropriate for it. 1941 mStackSupervisor.mStoppingActivities.remove(r); 1942 mStackSupervisor.mGoingToSleepActivities.remove(r); 1943 } catch (Exception e) { 1944 // Just skip on any failure; we'll make it 1945 // visible when it next restarts. 1946 Slog.w(TAG, "Exception thrown making visibile: " + r.intent.getComponent(), e); 1947 } 1948 handleAlreadyVisible(r); 1949 } 1950 1951 private boolean handleAlreadyVisible(ActivityRecord r) { 1952 r.stopFreezingScreenLocked(false); 1953 try { 1954 if (r.returningOptions != null) { 1955 r.app.thread.scheduleOnNewActivityOptions(r.appToken, r.returningOptions); 1956 } 1957 } catch(RemoteException e) { 1958 } 1959 return r.state == ActivityState.RESUMED; 1960 } 1961 1962 void convertActivityToTranslucent(ActivityRecord r) { 1963 mTranslucentActivityWaiting = r; 1964 mUndrawnActivitiesBelowTopTranslucent.clear(); 1965 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1966 } 1967 1968 void clearOtherAppTimeTrackers(AppTimeTracker except) { 1969 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1970 final TaskRecord task = mTaskHistory.get(taskNdx); 1971 final ArrayList<ActivityRecord> activities = task.mActivities; 1972 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1973 final ActivityRecord r = activities.get(activityNdx); 1974 if ( r.appTimeTracker != except) { 1975 r.appTimeTracker = null; 1976 } 1977 } 1978 } 1979 } 1980 1981 /** 1982 * Called as activities below the top translucent activity are redrawn. When the last one is 1983 * redrawn notify the top activity by calling 1984 * {@link Activity#onTranslucentConversionComplete}. 1985 * 1986 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 1987 * occurred and the activity will be notified immediately. 1988 */ 1989 void notifyActivityDrawnLocked(ActivityRecord r) { 1990 mActivityContainer.setDrawn(); 1991 if ((r == null) 1992 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 1993 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 1994 // The last undrawn activity below the top has just been drawn. If there is an 1995 // opaque activity at the top, notify it that it can become translucent safely now. 1996 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 1997 mTranslucentActivityWaiting = null; 1998 mUndrawnActivitiesBelowTopTranslucent.clear(); 1999 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 2000 2001 if (waitingActivity != null) { 2002 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 2003 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 2004 try { 2005 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 2006 waitingActivity.appToken, r != null); 2007 } catch (RemoteException e) { 2008 } 2009 } 2010 } 2011 } 2012 } 2013 2014 /** If any activities below the top running one are in the INITIALIZING state and they have a 2015 * starting window displayed then remove that starting window. It is possible that the activity 2016 * in this state will never resumed in which case that starting window will be orphaned. */ 2017 void cancelInitializingActivities() { 2018 final ActivityRecord topActivity = topRunningActivityLocked(); 2019 boolean aboveTop = true; 2020 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2021 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2022 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2023 final ActivityRecord r = activities.get(activityNdx); 2024 if (aboveTop) { 2025 if (r == topActivity) { 2026 aboveTop = false; 2027 } 2028 continue; 2029 } 2030 2031 if (r.state == ActivityState.INITIALIZING 2032 && r.mStartingWindowState == STARTING_WINDOW_SHOWN) { 2033 if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, 2034 "Found orphaned starting window " + r); 2035 r.mStartingWindowState = STARTING_WINDOW_REMOVED; 2036 mWindowManager.removeAppStartingWindow(r.appToken); 2037 } 2038 } 2039 } 2040 } 2041 2042 /** 2043 * Ensure that the top activity in the stack is resumed. 2044 * 2045 * @param prev The previously resumed activity, for when in the process 2046 * of pausing; can be null to call from elsewhere. 2047 * @param options Activity options. 2048 * 2049 * @return Returns true if something is being resumed, or false if 2050 * nothing happened. 2051 * 2052 * NOTE: It is not safe to call this method directly as it can cause an activity in a 2053 * non-focused stack to be resumed. 2054 * Use {@link ActivityStackSupervisor#resumeFocusedStackTopActivityLocked} to resume the 2055 * right activity for the current system state. 2056 */ 2057 boolean resumeTopActivityUncheckedLocked(ActivityRecord prev, ActivityOptions options) { 2058 if (mStackSupervisor.inResumeTopActivity) { 2059 // Don't even start recursing. 2060 return false; 2061 } 2062 2063 boolean result = false; 2064 try { 2065 // Protect against recursion. 2066 mStackSupervisor.inResumeTopActivity = true; 2067 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 2068 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 2069 mService.updateSleepIfNeededLocked(); 2070 } 2071 result = resumeTopActivityInnerLocked(prev, options); 2072 } finally { 2073 mStackSupervisor.inResumeTopActivity = false; 2074 } 2075 return result; 2076 } 2077 2078 private boolean resumeTopActivityInnerLocked(ActivityRecord prev, ActivityOptions options) { 2079 if (DEBUG_LOCKSCREEN) mService.logLockScreen(""); 2080 2081 if (!mService.mBooting && !mService.mBooted) { 2082 // Not ready yet! 2083 return false; 2084 } 2085 2086 ActivityRecord parent = mActivityContainer.mParentActivity; 2087 if ((parent != null && parent.state != ActivityState.RESUMED) || 2088 !mActivityContainer.isAttachedLocked()) { 2089 // Do not resume this stack if its parent is not resumed. 2090 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 2091 return false; 2092 } 2093 2094 mStackSupervisor.cancelInitializingActivities(); 2095 2096 // Find the first activity that is not finishing. 2097 final ActivityRecord next = topRunningActivityLocked(); 2098 2099 // Remember how we'll process this pause/resume situation, and ensure 2100 // that the state is reset however we wind up proceeding. 2101 final boolean userLeaving = mStackSupervisor.mUserLeaving; 2102 mStackSupervisor.mUserLeaving = false; 2103 2104 final TaskRecord prevTask = prev != null ? prev.task : null; 2105 if (next == null) { 2106 // There are no more activities! 2107 final String reason = "noMoreActivities"; 2108 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() 2109 ? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2110 if (!mFullscreen && adjustFocusToNextFocusableStackLocked(returnTaskType, reason)) { 2111 // Try to move focus to the next visible stack with a running activity if this 2112 // stack is not covering the entire screen. 2113 return mStackSupervisor.resumeFocusedStackTopActivityLocked( 2114 mStackSupervisor.getFocusedStack(), prev, null); 2115 } 2116 2117 // Let's just start up the Launcher... 2118 ActivityOptions.abort(options); 2119 if (DEBUG_STATES) Slog.d(TAG_STATES, 2120 "resumeTopActivityLocked: No more activities go home"); 2121 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2122 // Only resume home if on home display 2123 return isOnHomeDisplay() && 2124 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); 2125 } 2126 2127 next.delayedResume = false; 2128 2129 // If the top activity is the resumed one, nothing to do. 2130 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 2131 mStackSupervisor.allResumedActivitiesComplete()) { 2132 // Make sure we have executed any pending transitions, since there 2133 // should be nothing left to do at this point. 2134 mWindowManager.executeAppTransition(); 2135 mNoAnimActivities.clear(); 2136 ActivityOptions.abort(options); 2137 if (DEBUG_STATES) Slog.d(TAG_STATES, 2138 "resumeTopActivityLocked: Top activity resumed " + next); 2139 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2140 return false; 2141 } 2142 2143 final TaskRecord nextTask = next.task; 2144 if (prevTask != null && prevTask.stack == this && 2145 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 2146 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2147 if (prevTask == nextTask) { 2148 prevTask.setFrontOfTask(); 2149 } else if (prevTask != topTask()) { 2150 // This task is going away but it was supposed to return to the home stack. 2151 // Now the task above it has to return to the home task instead. 2152 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 2153 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 2154 } else if (!isOnHomeDisplay()) { 2155 return false; 2156 } else if (!isHomeStack()){ 2157 if (DEBUG_STATES) Slog.d(TAG_STATES, 2158 "resumeTopActivityLocked: Launching home next"); 2159 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 2160 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2161 return isOnHomeDisplay() && 2162 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); 2163 } 2164 } 2165 2166 // If we are sleeping, and there is no resumed activity, and the top 2167 // activity is paused, well that is the state we want. 2168 if (mService.isSleepingOrShuttingDown() 2169 && mLastPausedActivity == next 2170 && mStackSupervisor.allPausedActivitiesComplete()) { 2171 // Make sure we have executed any pending transitions, since there 2172 // should be nothing left to do at this point. 2173 mWindowManager.executeAppTransition(); 2174 mNoAnimActivities.clear(); 2175 ActivityOptions.abort(options); 2176 if (DEBUG_STATES) Slog.d(TAG_STATES, 2177 "resumeTopActivityLocked: Going to sleep and all paused"); 2178 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2179 return false; 2180 } 2181 2182 // Make sure that the user who owns this activity is started. If not, 2183 // we will just leave it as is because someone should be bringing 2184 // another user's activities to the top of the stack. 2185 if (!mService.mUserController.hasStartedUserState(next.userId)) { 2186 Slog.w(TAG, "Skipping resume of top activity " + next 2187 + ": user " + next.userId + " is stopped"); 2188 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2189 return false; 2190 } 2191 2192 // The activity may be waiting for stop, but that is no longer 2193 // appropriate for it. 2194 mStackSupervisor.mStoppingActivities.remove(next); 2195 mStackSupervisor.mGoingToSleepActivities.remove(next); 2196 next.sleeping = false; 2197 mStackSupervisor.mWaitingVisibleActivities.remove(next); 2198 2199 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next); 2200 2201 // If we are currently pausing an activity, then don't do anything until that is done. 2202 if (!mStackSupervisor.allPausedActivitiesComplete()) { 2203 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE, 2204 "resumeTopActivityLocked: Skip resume: some activity pausing."); 2205 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2206 return false; 2207 } 2208 2209 mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); 2210 2211 // We need to start pausing the current activity so the top one can be resumed... 2212 final boolean dontWaitForPause = (next.info.flags & FLAG_RESUME_WHILE_PAUSING) != 0; 2213 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 2214 if (mResumedActivity != null) { 2215 if (DEBUG_STATES) Slog.d(TAG_STATES, 2216 "resumeTopActivityLocked: Pausing " + mResumedActivity); 2217 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 2218 } 2219 if (pausing) { 2220 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES, 2221 "resumeTopActivityLocked: Skip resume: need to start pausing"); 2222 // At this point we want to put the upcoming activity's process 2223 // at the top of the LRU list, since we know we will be needing it 2224 // very soon and it would be a waste to let it get killed if it 2225 // happens to be sitting towards the end. 2226 if (next.app != null && next.app.thread != null) { 2227 mService.updateLruProcessLocked(next.app, true, null); 2228 } 2229 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2230 return true; 2231 } 2232 2233 // If the most recent activity was noHistory but was only stopped rather 2234 // than stopped+finished because the device went to sleep, we need to make 2235 // sure to finish it as we're making a new activity topmost. 2236 if (mService.isSleeping() && mLastNoHistoryActivity != null && 2237 !mLastNoHistoryActivity.finishing) { 2238 if (DEBUG_STATES) Slog.d(TAG_STATES, 2239 "no-history finish of " + mLastNoHistoryActivity + " on new resume"); 2240 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 2241 null, "resume-no-history", false); 2242 mLastNoHistoryActivity = null; 2243 } 2244 2245 if (prev != null && prev != next) { 2246 if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2247 && next != null && !next.nowVisible) { 2248 mStackSupervisor.mWaitingVisibleActivities.add(prev); 2249 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2250 "Resuming top, waiting visible to hide: " + prev); 2251 } else { 2252 // The next activity is already visible, so hide the previous 2253 // activity's windows right now so we can show the new one ASAP. 2254 // We only do this if the previous is finishing, which should mean 2255 // it is on top of the one being resumed so hiding it quickly 2256 // is good. Otherwise, we want to do the normal route of allowing 2257 // the resumed activity to be shown so we can decide if the 2258 // previous should actually be hidden depending on whether the 2259 // new one is found to be full-screen or not. 2260 if (prev.finishing) { 2261 mWindowManager.setAppVisibility(prev.appToken, false); 2262 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2263 "Not waiting for visible to hide: " + prev + ", waitingVisible=" 2264 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2265 + ", nowVisible=" + next.nowVisible); 2266 } else { 2267 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2268 "Previous already visible but still waiting to hide: " + prev 2269 + ", waitingVisible=" 2270 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2271 + ", nowVisible=" + next.nowVisible); 2272 } 2273 } 2274 } 2275 2276 // Launching this app's activity, make sure the app is no longer 2277 // considered stopped. 2278 try { 2279 AppGlobals.getPackageManager().setPackageStoppedState( 2280 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 2281 } catch (RemoteException e1) { 2282 } catch (IllegalArgumentException e) { 2283 Slog.w(TAG, "Failed trying to unstop package " 2284 + next.packageName + ": " + e); 2285 } 2286 2287 // We are starting up the next activity, so tell the window manager 2288 // that the previous one will be hidden soon. This way it can know 2289 // to ignore it when computing the desired screen orientation. 2290 boolean anim = true; 2291 if (prev != null) { 2292 if (prev.finishing) { 2293 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2294 "Prepare close transition: prev=" + prev); 2295 if (mNoAnimActivities.contains(prev)) { 2296 anim = false; 2297 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2298 } else { 2299 mWindowManager.prepareAppTransition(prev.task == next.task 2300 ? TRANSIT_ACTIVITY_CLOSE 2301 : TRANSIT_TASK_CLOSE, false); 2302 } 2303 mWindowManager.setAppVisibility(prev.appToken, false); 2304 } else { 2305 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2306 "Prepare open transition: prev=" + prev); 2307 if (mNoAnimActivities.contains(next)) { 2308 anim = false; 2309 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2310 } else { 2311 mWindowManager.prepareAppTransition(prev.task == next.task 2312 ? TRANSIT_ACTIVITY_OPEN 2313 : next.mLaunchTaskBehind 2314 ? TRANSIT_TASK_OPEN_BEHIND 2315 : TRANSIT_TASK_OPEN, false); 2316 } 2317 } 2318 } else { 2319 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous"); 2320 if (mNoAnimActivities.contains(next)) { 2321 anim = false; 2322 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2323 } else { 2324 mWindowManager.prepareAppTransition(TRANSIT_ACTIVITY_OPEN, false); 2325 } 2326 } 2327 2328 Bundle resumeAnimOptions = null; 2329 if (anim) { 2330 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 2331 if (opts != null) { 2332 resumeAnimOptions = opts.toBundle(); 2333 } 2334 next.applyOptionsLocked(); 2335 } else { 2336 next.clearOptionsLocked(); 2337 } 2338 2339 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2340 if (next.app != null && next.app.thread != null) { 2341 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next 2342 + " stopped=" + next.stopped + " visible=" + next.visible); 2343 2344 // If the previous activity is translucent, force a visibility update of 2345 // the next activity, so that it's added to WM's opening app list, and 2346 // transition animation can be set up properly. 2347 // For example, pressing Home button with a translucent activity in focus. 2348 // Launcher is already visible in this case. If we don't add it to opening 2349 // apps, maybeUpdateTransitToWallpaper() will fail to identify this as a 2350 // TRANSIT_WALLPAPER_OPEN animation, and run some funny animation. 2351 final boolean lastActivityTranslucent = lastStack != null 2352 && (!lastStack.mFullscreen 2353 || (lastStack.mLastPausedActivity != null 2354 && !lastStack.mLastPausedActivity.fullscreen)); 2355 2356 // This activity is now becoming visible. 2357 if (!next.visible || next.stopped || lastActivityTranslucent) { 2358 mWindowManager.setAppVisibility(next.appToken, true); 2359 } 2360 2361 // schedule launch ticks to collect information about slow apps. 2362 next.startLaunchTickingLocked(); 2363 2364 ActivityRecord lastResumedActivity = 2365 lastStack == null ? null :lastStack.mResumedActivity; 2366 ActivityState lastState = next.state; 2367 2368 mService.updateCpuStats(); 2369 2370 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)"); 2371 next.state = ActivityState.RESUMED; 2372 mResumedActivity = next; 2373 next.task.touchActiveTime(); 2374 mRecentTasks.addLocked(next.task); 2375 mService.updateLruProcessLocked(next.app, true, null); 2376 updateLRUListLocked(next); 2377 mService.updateOomAdjLocked(); 2378 2379 // Have the window manager re-evaluate the orientation of 2380 // the screen based on the new activity order. 2381 boolean notUpdated = true; 2382 if (mStackSupervisor.isFocusedStack(this)) { 2383 Configuration config = mWindowManager.updateOrientationFromAppTokens( 2384 mService.mConfiguration, 2385 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 2386 if (config != null) { 2387 next.frozenBeforeDestroy = true; 2388 } 2389 notUpdated = !mService.updateConfigurationLocked(config, next, false); 2390 } 2391 2392 if (notUpdated) { 2393 // The configuration update wasn't able to keep the existing 2394 // instance of the activity, and instead started a new one. 2395 // We should be all done, but let's just make sure our activity 2396 // is still at the top and schedule another run if something 2397 // weird happened. 2398 ActivityRecord nextNext = topRunningActivityLocked(); 2399 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES, 2400 "Activity config changed during resume: " + next 2401 + ", new next: " + nextNext); 2402 if (nextNext != next) { 2403 // Do over! 2404 mStackSupervisor.scheduleResumeTopActivities(); 2405 } 2406 if (mStackSupervisor.reportResumedActivityLocked(next)) { 2407 mNoAnimActivities.clear(); 2408 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2409 return true; 2410 } 2411 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2412 return false; 2413 } 2414 2415 try { 2416 // Deliver all pending results. 2417 ArrayList<ResultInfo> a = next.results; 2418 if (a != null) { 2419 final int N = a.size(); 2420 if (!next.finishing && N > 0) { 2421 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, 2422 "Delivering results to " + next + ": " + a); 2423 next.app.thread.scheduleSendResult(next.appToken, a); 2424 } 2425 } 2426 2427 if (next.newIntents != null) { 2428 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 2429 } 2430 2431 // Well the app will no longer be stopped. 2432 // Clear app token stopped state in window manager if needed. 2433 mWindowManager.notifyAppStopped(next.appToken, false); 2434 2435 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, 2436 System.identityHashCode(next), next.task.taskId, next.shortComponentName); 2437 2438 next.sleeping = false; 2439 mService.showAskCompatModeDialogLocked(next); 2440 next.app.pendingUiClean = true; 2441 next.app.forceProcessStateUpTo(mService.mTopProcessState); 2442 next.clearOptionsLocked(); 2443 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 2444 mService.isNextTransitionForward(), resumeAnimOptions); 2445 2446 mStackSupervisor.checkReadyForSleepLocked(); 2447 2448 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next); 2449 } catch (Exception e) { 2450 // Whoops, need to restart this activity! 2451 if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to " 2452 + lastState + ": " + next); 2453 next.state = lastState; 2454 if (lastStack != null) { 2455 lastStack.mResumedActivity = lastResumedActivity; 2456 } 2457 Slog.i(TAG, "Restarting because process died: " + next); 2458 if (!next.hasBeenLaunched) { 2459 next.hasBeenLaunched = true; 2460 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 2461 mStackSupervisor.isFrontStack(lastStack)) { 2462 next.showStartingWindow(null, true); 2463 } 2464 mStackSupervisor.startSpecificActivityLocked(next, true, false); 2465 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2466 return true; 2467 } 2468 2469 // From this point on, if something goes wrong there is no way 2470 // to recover the activity. 2471 try { 2472 completeResumeLocked(next); 2473 } catch (Exception e) { 2474 // If any exception gets thrown, toss away this 2475 // activity and try the next one. 2476 Slog.w(TAG, "Exception thrown during resume of " + next, e); 2477 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 2478 "resume-exception", true); 2479 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2480 return true; 2481 } 2482 } else { 2483 // Whoops, need to restart this activity! 2484 if (!next.hasBeenLaunched) { 2485 next.hasBeenLaunched = true; 2486 } else { 2487 if (SHOW_APP_STARTING_PREVIEW) { 2488 next.showStartingWindow(null, true); 2489 } 2490 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next); 2491 } 2492 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next); 2493 mStackSupervisor.startSpecificActivityLocked(next, true, true); 2494 } 2495 2496 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2497 return true; 2498 } 2499 2500 private TaskRecord getNextTask(TaskRecord targetTask) { 2501 final int index = mTaskHistory.indexOf(targetTask); 2502 if (index >= 0) { 2503 final int numTasks = mTaskHistory.size(); 2504 for (int i = index + 1; i < numTasks; ++i) { 2505 TaskRecord task = mTaskHistory.get(i); 2506 if (task.userId == targetTask.userId) { 2507 return task; 2508 } 2509 } 2510 } 2511 return null; 2512 } 2513 2514 private void insertTaskAtPosition(TaskRecord task, int position) { 2515 if (position >= mTaskHistory.size()) { 2516 insertTaskAtTop(task, null); 2517 return; 2518 } 2519 // Calculate maximum possible position for this task. 2520 int maxPosition = mTaskHistory.size(); 2521 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) 2522 && task.topRunningActivityLocked() == null) { 2523 // Put non-current user tasks below current user tasks. 2524 while (maxPosition > 0) { 2525 final TaskRecord tmpTask = mTaskHistory.get(maxPosition - 1); 2526 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2527 || tmpTask.topRunningActivityLocked() == null) { 2528 break; 2529 } 2530 maxPosition--; 2531 } 2532 } 2533 position = Math.min(position, maxPosition); 2534 mTaskHistory.remove(task); 2535 mTaskHistory.add(position, task); 2536 updateTaskMovement(task, true); 2537 } 2538 2539 private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) { 2540 // If the moving task is over home stack, transfer its return type to next task 2541 if (task.isOverHomeStack()) { 2542 final TaskRecord nextTask = getNextTask(task); 2543 if (nextTask != null) { 2544 nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); 2545 } 2546 } 2547 2548 // If this is being moved to the top by another activity or being launched from the home 2549 // activity, set mTaskToReturnTo accordingly. 2550 if (isOnHomeDisplay()) { 2551 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2552 final boolean fromHome = lastStack.isHomeStack(); 2553 if (!isHomeStack() && (fromHome || topTask() != task)) { 2554 int returnToType = APPLICATION_ACTIVITY_TYPE; 2555 if (fromHome && StackId.allowTopTaskToReturnHome(mStackId)) { 2556 returnToType = lastStack.topTask() == null 2557 ? HOME_ACTIVITY_TYPE : lastStack.topTask().taskType; 2558 } 2559 task.setTaskToReturnTo(returnToType); 2560 } 2561 } else { 2562 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 2563 } 2564 2565 mTaskHistory.remove(task); 2566 // Now put task at top. 2567 int taskNdx = mTaskHistory.size(); 2568 final boolean notShownWhenLocked = 2569 (newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) 2570 || (newActivity == null && task.topRunningActivityLocked() == null); 2571 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) { 2572 // Put non-current user tasks below current user tasks. 2573 while (--taskNdx >= 0) { 2574 final TaskRecord tmpTask = mTaskHistory.get(taskNdx); 2575 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2576 || tmpTask.topRunningActivityLocked() == null) { 2577 break; 2578 } 2579 } 2580 ++taskNdx; 2581 } 2582 mTaskHistory.add(taskNdx, task); 2583 updateTaskMovement(task, true); 2584 } 2585 2586 final void startActivityLocked(ActivityRecord r, boolean newTask, boolean keepCurTransition, 2587 ActivityOptions options) { 2588 TaskRecord rTask = r.task; 2589 final int taskId = rTask.taskId; 2590 // mLaunchTaskBehind tasks get placed at the back of the task stack. 2591 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 2592 // Last activity in task had been removed or ActivityManagerService is reusing task. 2593 // Insert or replace. 2594 // Might not even be in. 2595 insertTaskAtTop(rTask, r); 2596 mWindowManager.moveTaskToTop(taskId); 2597 } 2598 TaskRecord task = null; 2599 if (!newTask) { 2600 // If starting in an existing task, find where that is... 2601 boolean startIt = true; 2602 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2603 task = mTaskHistory.get(taskNdx); 2604 if (task.getTopActivity() == null) { 2605 // All activities in task are finishing. 2606 continue; 2607 } 2608 if (task == r.task) { 2609 // Here it is! Now, if this is not yet visible to the 2610 // user, then just add it without starting; it will 2611 // get started when the user navigates back to it. 2612 if (!startIt) { 2613 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 2614 + task, new RuntimeException("here").fillInStackTrace()); 2615 task.addActivityToTop(r); 2616 r.putInHistory(); 2617 addConfigOverride(r, task); 2618 if (VALIDATE_TOKENS) { 2619 validateAppTokensLocked(); 2620 } 2621 ActivityOptions.abort(options); 2622 return; 2623 } 2624 break; 2625 } else if (task.numFullscreen > 0) { 2626 startIt = false; 2627 } 2628 } 2629 } 2630 2631 // Place a new activity at top of stack, so it is next to interact 2632 // with the user. 2633 2634 // If we are not placing the new activity frontmost, we do not want 2635 // to deliver the onUserLeaving callback to the actual frontmost 2636 // activity 2637 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2638 mStackSupervisor.mUserLeaving = false; 2639 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 2640 "startActivity() behind front, mUserLeaving=false"); 2641 } 2642 2643 task = r.task; 2644 2645 // Slot the activity into the history stack and proceed 2646 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2647 new RuntimeException("here").fillInStackTrace()); 2648 task.addActivityToTop(r); 2649 task.setFrontOfTask(); 2650 2651 r.putInHistory(); 2652 if (!isHomeStack() || numActivities() > 0) { 2653 // We want to show the starting preview window if we are 2654 // switching to a new task, or the next activity's process is 2655 // not currently running. 2656 boolean showStartingIcon = newTask; 2657 ProcessRecord proc = r.app; 2658 if (proc == null) { 2659 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2660 } 2661 if (proc == null || proc.thread == null) { 2662 showStartingIcon = true; 2663 } 2664 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2665 "Prepare open transition: starting " + r); 2666 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2667 mWindowManager.prepareAppTransition(TRANSIT_NONE, keepCurTransition); 2668 mNoAnimActivities.add(r); 2669 } else { 2670 mWindowManager.prepareAppTransition(newTask 2671 ? r.mLaunchTaskBehind 2672 ? TRANSIT_TASK_OPEN_BEHIND 2673 : TRANSIT_TASK_OPEN 2674 : TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2675 mNoAnimActivities.remove(r); 2676 } 2677 addConfigOverride(r, task); 2678 boolean doShow = true; 2679 if (newTask) { 2680 // Even though this activity is starting fresh, we still need 2681 // to reset it to make sure we apply affinities to move any 2682 // existing activities from other tasks in to it. 2683 // If the caller has requested that the target task be 2684 // reset, then do so. 2685 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2686 resetTaskIfNeededLocked(r, r); 2687 doShow = topRunningNonDelayedActivityLocked(null) == r; 2688 } 2689 } else if (options != null && options.getAnimationType() 2690 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2691 doShow = false; 2692 } 2693 if (r.mLaunchTaskBehind) { 2694 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2695 // tell WindowManager that r is visible even though it is at the back of the stack. 2696 mWindowManager.setAppVisibility(r.appToken, true); 2697 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 2698 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2699 // Figure out if we are transitioning from another activity that is 2700 // "has the same starting icon" as the next one. This allows the 2701 // window manager to keep the previous window it had previously 2702 // created, if it still had one. 2703 ActivityRecord prev = r.task.topRunningActivityWithStartingWindowLocked(); 2704 if (prev != null) { 2705 // We don't want to reuse the previous starting preview if: 2706 // (1) The current activity is in a different task. 2707 if (prev.task != r.task) { 2708 prev = null; 2709 } 2710 // (2) The current activity is already displayed. 2711 else if (prev.nowVisible) { 2712 prev = null; 2713 } 2714 } 2715 r.showStartingWindow(prev, showStartingIcon); 2716 } 2717 } else { 2718 // If this is the first activity, don't do any fancy animations, 2719 // because there is nothing for it to animate on top of. 2720 addConfigOverride(r, task); 2721 ActivityOptions.abort(options); 2722 options = null; 2723 } 2724 if (VALIDATE_TOKENS) { 2725 validateAppTokensLocked(); 2726 } 2727 } 2728 2729 final void validateAppTokensLocked() { 2730 mValidateAppTokens.clear(); 2731 mValidateAppTokens.ensureCapacity(numActivities()); 2732 final int numTasks = mTaskHistory.size(); 2733 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2734 TaskRecord task = mTaskHistory.get(taskNdx); 2735 final ArrayList<ActivityRecord> activities = task.mActivities; 2736 if (activities.isEmpty()) { 2737 continue; 2738 } 2739 TaskGroup group = new TaskGroup(); 2740 group.taskId = task.taskId; 2741 mValidateAppTokens.add(group); 2742 final int numActivities = activities.size(); 2743 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2744 final ActivityRecord r = activities.get(activityNdx); 2745 group.tokens.add(r.appToken); 2746 } 2747 } 2748 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2749 } 2750 2751 /** 2752 * Perform a reset of the given task, if needed as part of launching it. 2753 * Returns the new HistoryRecord at the top of the task. 2754 */ 2755 /** 2756 * Helper method for #resetTaskIfNeededLocked. 2757 * We are inside of the task being reset... we'll either finish this activity, push it out 2758 * for another task, or leave it as-is. 2759 * @param task The task containing the Activity (taskTop) that might be reset. 2760 * @param forceReset 2761 * @return An ActivityOptions that needs to be processed. 2762 */ 2763 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2764 ActivityOptions topOptions = null; 2765 2766 int replyChainEnd = -1; 2767 boolean canMoveOptions = true; 2768 2769 // We only do this for activities that are not the root of the task (since if we finish 2770 // the root, we may no longer have the task!). 2771 final ArrayList<ActivityRecord> activities = task.mActivities; 2772 final int numActivities = activities.size(); 2773 final int rootActivityNdx = task.findEffectiveRootIndex(); 2774 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2775 ActivityRecord target = activities.get(i); 2776 if (target.frontOfTask) 2777 break; 2778 2779 final int flags = target.info.flags; 2780 final boolean finishOnTaskLaunch = 2781 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2782 final boolean allowTaskReparenting = 2783 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2784 final boolean clearWhenTaskReset = 2785 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2786 2787 if (!finishOnTaskLaunch 2788 && !clearWhenTaskReset 2789 && target.resultTo != null) { 2790 // If this activity is sending a reply to a previous 2791 // activity, we can't do anything with it now until 2792 // we reach the start of the reply chain. 2793 // XXX note that we are assuming the result is always 2794 // to the previous activity, which is almost always 2795 // the case but we really shouldn't count on. 2796 if (replyChainEnd < 0) { 2797 replyChainEnd = i; 2798 } 2799 } else if (!finishOnTaskLaunch 2800 && !clearWhenTaskReset 2801 && allowTaskReparenting 2802 && target.taskAffinity != null 2803 && !target.taskAffinity.equals(task.affinity)) { 2804 // If this activity has an affinity for another 2805 // task, then we need to move it out of here. We will 2806 // move it as far out of the way as possible, to the 2807 // bottom of the activity stack. This also keeps it 2808 // correctly ordered with any activities we previously 2809 // moved. 2810 final TaskRecord targetTask; 2811 final ActivityRecord bottom = 2812 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2813 mTaskHistory.get(0).mActivities.get(0) : null; 2814 if (bottom != null && target.taskAffinity != null 2815 && target.taskAffinity.equals(bottom.task.affinity)) { 2816 // If the activity currently at the bottom has the 2817 // same task affinity as the one we are moving, 2818 // then merge it into the same task. 2819 targetTask = bottom.task; 2820 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2821 + " out to bottom task " + bottom.task); 2822 } else { 2823 targetTask = createTaskRecord( 2824 mStackSupervisor.getNextTaskIdForUserLocked(target.userId), 2825 target.info, null, null, null, false); 2826 targetTask.affinityIntent = target.intent; 2827 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2828 + " out to new task " + target.task); 2829 } 2830 2831 setAppTask(target, targetTask); 2832 2833 boolean noOptions = canMoveOptions; 2834 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2835 for (int srcPos = start; srcPos >= i; --srcPos) { 2836 final ActivityRecord p = activities.get(srcPos); 2837 if (p.finishing) { 2838 continue; 2839 } 2840 2841 canMoveOptions = false; 2842 if (noOptions && topOptions == null) { 2843 topOptions = p.takeOptionsLocked(); 2844 if (topOptions != null) { 2845 noOptions = false; 2846 } 2847 } 2848 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2849 "Removing activity " + p + " from task=" + task + " adding to task=" 2850 + targetTask + " Callers=" + Debug.getCallers(4)); 2851 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2852 "Pushing next activity " + p + " out to target's task " + target.task); 2853 p.setTask(targetTask, null); 2854 targetTask.addActivityAtBottom(p); 2855 2856 setAppTask(p, targetTask); 2857 } 2858 2859 mWindowManager.moveTaskToBottom(targetTask.taskId); 2860 if (VALIDATE_TOKENS) { 2861 validateAppTokensLocked(); 2862 } 2863 2864 replyChainEnd = -1; 2865 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2866 // If the activity should just be removed -- either 2867 // because it asks for it, or the task should be 2868 // cleared -- then finish it and anything that is 2869 // part of its reply chain. 2870 int end; 2871 if (clearWhenTaskReset) { 2872 // In this case, we want to finish this activity 2873 // and everything above it, so be sneaky and pretend 2874 // like these are all in the reply chain. 2875 end = activities.size() - 1; 2876 } else if (replyChainEnd < 0) { 2877 end = i; 2878 } else { 2879 end = replyChainEnd; 2880 } 2881 boolean noOptions = canMoveOptions; 2882 for (int srcPos = i; srcPos <= end; srcPos++) { 2883 ActivityRecord p = activities.get(srcPos); 2884 if (p.finishing) { 2885 continue; 2886 } 2887 canMoveOptions = false; 2888 if (noOptions && topOptions == null) { 2889 topOptions = p.takeOptionsLocked(); 2890 if (topOptions != null) { 2891 noOptions = false; 2892 } 2893 } 2894 if (DEBUG_TASKS) Slog.w(TAG_TASKS, 2895 "resetTaskIntendedTask: calling finishActivity on " + p); 2896 if (finishActivityLocked( 2897 p, Activity.RESULT_CANCELED, null, "reset-task", false)) { 2898 end--; 2899 srcPos--; 2900 } 2901 } 2902 replyChainEnd = -1; 2903 } else { 2904 // If we were in the middle of a chain, well the 2905 // activity that started it all doesn't want anything 2906 // special, so leave it all as-is. 2907 replyChainEnd = -1; 2908 } 2909 } 2910 2911 return topOptions; 2912 } 2913 2914 /** 2915 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2916 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2917 * @param affinityTask The task we are looking for an affinity to. 2918 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2919 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2920 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2921 */ 2922 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2923 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2924 int replyChainEnd = -1; 2925 final int taskId = task.taskId; 2926 final String taskAffinity = task.affinity; 2927 2928 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2929 final int numActivities = activities.size(); 2930 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2931 2932 // Do not operate on or below the effective root Activity. 2933 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2934 ActivityRecord target = activities.get(i); 2935 if (target.frontOfTask) 2936 break; 2937 2938 final int flags = target.info.flags; 2939 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2940 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2941 2942 if (target.resultTo != null) { 2943 // If this activity is sending a reply to a previous 2944 // activity, we can't do anything with it now until 2945 // we reach the start of the reply chain. 2946 // XXX note that we are assuming the result is always 2947 // to the previous activity, which is almost always 2948 // the case but we really shouldn't count on. 2949 if (replyChainEnd < 0) { 2950 replyChainEnd = i; 2951 } 2952 } else if (topTaskIsHigher 2953 && allowTaskReparenting 2954 && taskAffinity != null 2955 && taskAffinity.equals(target.taskAffinity)) { 2956 // This activity has an affinity for our task. Either remove it if we are 2957 // clearing or move it over to our task. Note that 2958 // we currently punt on the case where we are resetting a 2959 // task that is not at the top but who has activities above 2960 // with an affinity to it... this is really not a normal 2961 // case, and we will need to later pull that task to the front 2962 // and usually at that point we will do the reset and pick 2963 // up those remaining activities. (This only happens if 2964 // someone starts an activity in a new task from an activity 2965 // in a task that is not currently on top.) 2966 if (forceReset || finishOnTaskLaunch) { 2967 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2968 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2969 "Finishing task at index " + start + " to " + i); 2970 for (int srcPos = start; srcPos >= i; --srcPos) { 2971 final ActivityRecord p = activities.get(srcPos); 2972 if (p.finishing) { 2973 continue; 2974 } 2975 finishActivityLocked( 2976 p, Activity.RESULT_CANCELED, null, "move-affinity", false); 2977 } 2978 } else { 2979 if (taskInsertionPoint < 0) { 2980 taskInsertionPoint = task.mActivities.size(); 2981 2982 } 2983 2984 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 2985 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2986 "Reparenting from task=" + affinityTask + ":" + start + "-" + i 2987 + " to task=" + task + ":" + taskInsertionPoint); 2988 for (int srcPos = start; srcPos >= i; --srcPos) { 2989 final ActivityRecord p = activities.get(srcPos); 2990 p.setTask(task, null); 2991 task.addActivityAtIndex(taskInsertionPoint, p); 2992 2993 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2994 "Removing and adding activity " + p + " to stack at " + task 2995 + " callers=" + Debug.getCallers(3)); 2996 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p 2997 + " from " + srcPos + " in to resetting task " + task); 2998 setAppTask(p, task); 2999 } 3000 mWindowManager.moveTaskToTop(taskId); 3001 if (VALIDATE_TOKENS) { 3002 validateAppTokensLocked(); 3003 } 3004 3005 // Now we've moved it in to place... but what if this is 3006 // a singleTop activity and we have put it on top of another 3007 // instance of the same activity? Then we drop the instance 3008 // below so it remains singleTop. 3009 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 3010 ArrayList<ActivityRecord> taskActivities = task.mActivities; 3011 int targetNdx = taskActivities.indexOf(target); 3012 if (targetNdx > 0) { 3013 ActivityRecord p = taskActivities.get(targetNdx - 1); 3014 if (p.intent.getComponent().equals(target.intent.getComponent())) { 3015 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 3016 false); 3017 } 3018 } 3019 } 3020 } 3021 3022 replyChainEnd = -1; 3023 } 3024 } 3025 return taskInsertionPoint; 3026 } 3027 3028 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 3029 ActivityRecord newActivity) { 3030 boolean forceReset = 3031 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 3032 if (ACTIVITY_INACTIVE_RESET_TIME > 0 3033 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 3034 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 3035 forceReset = true; 3036 } 3037 } 3038 3039 final TaskRecord task = taskTop.task; 3040 3041 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 3042 * for remaining tasks. Used for later tasks to reparent to task. */ 3043 boolean taskFound = false; 3044 3045 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 3046 ActivityOptions topOptions = null; 3047 3048 // Preserve the location for reparenting in the new task. 3049 int reparentInsertionPoint = -1; 3050 3051 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 3052 final TaskRecord targetTask = mTaskHistory.get(i); 3053 3054 if (targetTask == task) { 3055 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 3056 taskFound = true; 3057 } else { 3058 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 3059 taskFound, forceReset, reparentInsertionPoint); 3060 } 3061 } 3062 3063 int taskNdx = mTaskHistory.indexOf(task); 3064 if (taskNdx >= 0) { 3065 do { 3066 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 3067 } while (taskTop == null && taskNdx >= 0); 3068 } 3069 3070 if (topOptions != null) { 3071 // If we got some ActivityOptions from an activity on top that 3072 // was removed from the task, propagate them to the new real top. 3073 if (taskTop != null) { 3074 taskTop.updateOptionsLocked(topOptions); 3075 } else { 3076 topOptions.abort(); 3077 } 3078 } 3079 3080 return taskTop; 3081 } 3082 3083 void sendActivityResultLocked(int callingUid, ActivityRecord r, 3084 String resultWho, int requestCode, int resultCode, Intent data) { 3085 3086 if (callingUid > 0) { 3087 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 3088 data, r.getUriPermissionsLocked(), r.userId); 3089 } 3090 3091 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 3092 + " : who=" + resultWho + " req=" + requestCode 3093 + " res=" + resultCode + " data=" + data); 3094 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 3095 try { 3096 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 3097 list.add(new ResultInfo(resultWho, requestCode, 3098 resultCode, data)); 3099 r.app.thread.scheduleSendResult(r.appToken, list); 3100 return; 3101 } catch (Exception e) { 3102 Slog.w(TAG, "Exception thrown sending result to " + r, e); 3103 } 3104 } 3105 3106 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 3107 } 3108 3109 private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { 3110 if (!mStackSupervisor.isFocusedStack(this) || mService.mFocusedActivity != r) { 3111 return; 3112 } 3113 3114 final ActivityRecord next = topRunningActivityLocked(); 3115 final String myReason = reason + " adjustFocus"; 3116 if (next != r) { 3117 if (next != null && StackId.keepFocusInStackIfPossible(mStackId) && isFocusable()) { 3118 // For freeform, docked, and pinned stacks we always keep the focus within the 3119 // stack as long as there is a running activity in the stack that we can adjust 3120 // focus to. 3121 mService.setFocusedActivityLocked(next, myReason); 3122 return; 3123 } else { 3124 final TaskRecord task = r.task; 3125 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 3126 final int taskToReturnTo = task.getTaskToReturnTo(); 3127 3128 // For non-fullscreen stack, we want to move the focus to the next visible 3129 // stack to prevent the home screen from moving to the top and obscuring 3130 // other visible stacks. 3131 if (!mFullscreen 3132 && adjustFocusToNextFocusableStackLocked(taskToReturnTo, myReason)) { 3133 return; 3134 } 3135 // Move the home stack to the top if this stack is fullscreen or there is no 3136 // other visible stack. 3137 if (mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, myReason)) { 3138 // Activity focus was already adjusted. Nothing else to do... 3139 return; 3140 } 3141 } 3142 } 3143 } 3144 3145 mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked(), myReason); 3146 } 3147 3148 private boolean adjustFocusToNextFocusableStackLocked(int taskToReturnTo, String reason) { 3149 final ActivityStack stack = getNextFocusableStackLocked(); 3150 final String myReason = reason + " adjustFocusToNextFocusableStack"; 3151 if (stack == null) { 3152 return false; 3153 } 3154 3155 final ActivityRecord top = stack.topRunningActivityLocked(); 3156 3157 if (stack.isHomeStack() && (top == null || !top.visible)) { 3158 // If we will be focusing on the home stack next and its current top activity isn't 3159 // visible, then use the task return to value to determine the home task to display next. 3160 return mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, reason); 3161 } 3162 return mService.setFocusedActivityLocked(top, myReason); 3163 } 3164 3165 final void stopActivityLocked(ActivityRecord r) { 3166 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r); 3167 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 3168 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 3169 if (!r.finishing) { 3170 if (!mService.isSleeping()) { 3171 if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r); 3172 if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 3173 "stop-no-history", false)) { 3174 // Activity was finished, no need to continue trying to schedule stop. 3175 adjustFocusedActivityLocked(r, "stopActivityFinished"); 3176 r.resumeKeyDispatchingLocked(); 3177 return; 3178 } 3179 } else { 3180 if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r 3181 + " on stop because we're just sleeping"); 3182 } 3183 } 3184 } 3185 3186 if (r.app != null && r.app.thread != null) { 3187 adjustFocusedActivityLocked(r, "stopActivity"); 3188 r.resumeKeyDispatchingLocked(); 3189 try { 3190 r.stopped = false; 3191 if (DEBUG_STATES) Slog.v(TAG_STATES, 3192 "Moving to STOPPING: " + r + " (stop requested)"); 3193 r.state = ActivityState.STOPPING; 3194 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 3195 "Stopping visible=" + r.visible + " for " + r); 3196 if (!r.visible) { 3197 mWindowManager.setAppVisibility(r.appToken, false); 3198 } 3199 EventLogTags.writeAmStopActivity( 3200 r.userId, System.identityHashCode(r), r.shortComponentName); 3201 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 3202 if (mService.isSleepingOrShuttingDown()) { 3203 r.setSleeping(true); 3204 } 3205 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 3206 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 3207 } catch (Exception e) { 3208 // Maybe just ignore exceptions here... if the process 3209 // has crashed, our death notification will clean things 3210 // up. 3211 Slog.w(TAG, "Exception thrown during pause", e); 3212 // Just in case, assume it to be stopped. 3213 r.stopped = true; 3214 if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r); 3215 r.state = ActivityState.STOPPED; 3216 if (r.deferRelaunchUntilPaused) { 3217 destroyActivityLocked(r, true, "stop-except"); 3218 } 3219 } 3220 } 3221 } 3222 3223 /** 3224 * @return Returns true if the activity is being finished, false if for 3225 * some reason it is being left as-is. 3226 */ 3227 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 3228 Intent resultData, String reason, boolean oomAdj) { 3229 ActivityRecord r = isInStackLocked(token); 3230 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES, 3231 "Finishing activity token=" + token + " r=" 3232 + ", result=" + resultCode + ", data=" + resultData 3233 + ", reason=" + reason); 3234 if (r == null) { 3235 return false; 3236 } 3237 3238 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 3239 return true; 3240 } 3241 3242 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 3243 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3244 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3245 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3246 ActivityRecord r = activities.get(activityNdx); 3247 if (r.resultTo == self && r.requestCode == requestCode) { 3248 if ((r.resultWho == null && resultWho == null) || 3249 (r.resultWho != null && r.resultWho.equals(resultWho))) { 3250 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 3251 false); 3252 } 3253 } 3254 } 3255 } 3256 mService.updateOomAdjLocked(); 3257 } 3258 3259 final TaskRecord finishTopRunningActivityLocked(ProcessRecord app, String reason) { 3260 ActivityRecord r = topRunningActivityLocked(); 3261 TaskRecord finishedTask = null; 3262 if (r == null || r.app != app) { 3263 return null; 3264 } 3265 Slog.w(TAG, " Force finishing activity " 3266 + r.intent.getComponent().flattenToShortString()); 3267 int taskNdx = mTaskHistory.indexOf(r.task); 3268 int activityNdx = r.task.mActivities.indexOf(r); 3269 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3270 finishedTask = r.task; 3271 // Also terminate any activities below it that aren't yet 3272 // stopped, to avoid a situation where one will get 3273 // re-start our crashing activity once it gets resumed again. 3274 --activityNdx; 3275 if (activityNdx < 0) { 3276 do { 3277 --taskNdx; 3278 if (taskNdx < 0) { 3279 break; 3280 } 3281 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 3282 } while (activityNdx < 0); 3283 } 3284 if (activityNdx >= 0) { 3285 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 3286 if (r.state == ActivityState.RESUMED 3287 || r.state == ActivityState.PAUSING 3288 || r.state == ActivityState.PAUSED) { 3289 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 3290 Slog.w(TAG, " Force finishing activity " 3291 + r.intent.getComponent().flattenToShortString()); 3292 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3293 } 3294 } 3295 } 3296 return finishedTask; 3297 } 3298 3299 final void finishVoiceTask(IVoiceInteractionSession session) { 3300 IBinder sessionBinder = session.asBinder(); 3301 boolean didOne = false; 3302 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3303 TaskRecord tr = mTaskHistory.get(taskNdx); 3304 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 3305 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3306 ActivityRecord r = tr.mActivities.get(activityNdx); 3307 if (!r.finishing) { 3308 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 3309 false); 3310 didOne = true; 3311 } 3312 } 3313 } else { 3314 // Check if any of the activities are using voice 3315 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3316 ActivityRecord r = tr.mActivities.get(activityNdx); 3317 if (r.voiceSession != null 3318 && r.voiceSession.asBinder() == sessionBinder) { 3319 // Inform of cancellation 3320 r.clearVoiceSessionLocked(); 3321 try { 3322 r.app.thread.scheduleLocalVoiceInteractionStarted((IBinder) r.appToken, 3323 null); 3324 } catch (RemoteException re) { 3325 // Ok 3326 } 3327 mService.finishRunningVoiceLocked(); 3328 break; 3329 } 3330 } 3331 } 3332 } 3333 3334 if (didOne) { 3335 mService.updateOomAdjLocked(); 3336 } 3337 } 3338 3339 final boolean finishActivityAffinityLocked(ActivityRecord r) { 3340 ArrayList<ActivityRecord> activities = r.task.mActivities; 3341 for (int index = activities.indexOf(r); index >= 0; --index) { 3342 ActivityRecord cur = activities.get(index); 3343 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 3344 break; 3345 } 3346 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 3347 } 3348 return true; 3349 } 3350 3351 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 3352 // send the result 3353 ActivityRecord resultTo = r.resultTo; 3354 if (resultTo != null) { 3355 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo 3356 + " who=" + r.resultWho + " req=" + r.requestCode 3357 + " res=" + resultCode + " data=" + resultData); 3358 if (resultTo.userId != r.userId) { 3359 if (resultData != null) { 3360 resultData.prepareToLeaveUser(r.userId); 3361 } 3362 } 3363 if (r.info.applicationInfo.uid > 0) { 3364 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 3365 resultTo.packageName, resultData, 3366 resultTo.getUriPermissionsLocked(), resultTo.userId); 3367 } 3368 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 3369 resultData); 3370 r.resultTo = null; 3371 } 3372 else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r); 3373 3374 // Make sure this HistoryRecord is not holding on to other resources, 3375 // because clients have remote IPC references to this object so we 3376 // can't assume that will go away and want to avoid circular IPC refs. 3377 r.results = null; 3378 r.pendingResults = null; 3379 r.newIntents = null; 3380 r.icicle = null; 3381 } 3382 3383 /** 3384 * @return Returns true if this activity has been removed from the history 3385 * list, or false if it is still in the list and will be removed later. 3386 */ 3387 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 3388 String reason, boolean oomAdj) { 3389 if (r.finishing) { 3390 Slog.w(TAG, "Duplicate finish request for " + r); 3391 return false; 3392 } 3393 3394 r.makeFinishingLocked(); 3395 final TaskRecord task = r.task; 3396 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3397 r.userId, System.identityHashCode(r), 3398 task.taskId, r.shortComponentName, reason); 3399 final ArrayList<ActivityRecord> activities = task.mActivities; 3400 final int index = activities.indexOf(r); 3401 if (index < (activities.size() - 1)) { 3402 task.setFrontOfTask(); 3403 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 3404 // If the caller asked that this activity (and all above it) 3405 // be cleared when the task is reset, don't lose that information, 3406 // but propagate it up to the next activity. 3407 ActivityRecord next = activities.get(index+1); 3408 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 3409 } 3410 } 3411 3412 r.pauseKeyDispatchingLocked(); 3413 3414 adjustFocusedActivityLocked(r, "finishActivity"); 3415 3416 finishActivityResultsLocked(r, resultCode, resultData); 3417 3418 final boolean endTask = index <= 0; 3419 final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE; 3420 if (mResumedActivity == r) { 3421 3422 if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 3423 "Prepare close transition: finishing " + r); 3424 mWindowManager.prepareAppTransition(transit, false); 3425 3426 // Tell window manager to prepare for this one to be removed. 3427 mWindowManager.setAppVisibility(r.appToken, false); 3428 3429 if (mPausingActivity == null) { 3430 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r); 3431 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 3432 "finish() => pause with userLeaving=false"); 3433 startPausingLocked(false, false, false, false); 3434 } 3435 3436 if (endTask) { 3437 mStackSupervisor.removeLockedTaskLocked(task); 3438 } 3439 } else if (r.state != ActivityState.PAUSING) { 3440 // If the activity is PAUSING, we will complete the finish once 3441 // it is done pausing; else we can just directly finish it here. 3442 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r); 3443 if (r.visible) { 3444 mWindowManager.prepareAppTransition(transit, false); 3445 mWindowManager.setAppVisibility(r.appToken, false); 3446 mWindowManager.executeAppTransition(); 3447 if (!mStackSupervisor.mWaitingVisibleActivities.contains(r)) { 3448 mStackSupervisor.mWaitingVisibleActivities.add(r); 3449 } 3450 } 3451 return finishCurrentActivityLocked(r, (r.visible || r.nowVisible) ? 3452 FINISH_AFTER_VISIBLE : FINISH_AFTER_PAUSE, oomAdj) == null; 3453 } else { 3454 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r); 3455 } 3456 3457 return false; 3458 } 3459 3460 static final int FINISH_IMMEDIATELY = 0; 3461 static final int FINISH_AFTER_PAUSE = 1; 3462 static final int FINISH_AFTER_VISIBLE = 2; 3463 3464 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 3465 // First things first: if this activity is currently visible, 3466 // and the resumed activity is not yet visible, then hold off on 3467 // finishing until the resumed one becomes visible. 3468 3469 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 3470 3471 if (mode == FINISH_AFTER_VISIBLE && (r.visible || r.nowVisible) 3472 && next != null && !next.nowVisible) { 3473 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 3474 addToStopping(r, false /* immediate */); 3475 } 3476 if (DEBUG_STATES) Slog.v(TAG_STATES, 3477 "Moving to STOPPING: "+ r + " (finish requested)"); 3478 r.state = ActivityState.STOPPING; 3479 if (oomAdj) { 3480 mService.updateOomAdjLocked(); 3481 } 3482 return r; 3483 } 3484 3485 // make sure the record is cleaned out of other places. 3486 mStackSupervisor.mStoppingActivities.remove(r); 3487 mStackSupervisor.mGoingToSleepActivities.remove(r); 3488 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3489 if (mResumedActivity == r) { 3490 mResumedActivity = null; 3491 } 3492 final ActivityState prevState = r.state; 3493 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r); 3494 r.state = ActivityState.FINISHING; 3495 3496 if (mode == FINISH_IMMEDIATELY 3497 || (prevState == ActivityState.PAUSED 3498 && (mode == FINISH_AFTER_PAUSE || mStackId == PINNED_STACK_ID)) 3499 || prevState == ActivityState.STOPPED 3500 || prevState == ActivityState.INITIALIZING) { 3501 r.makeFinishingLocked(); 3502 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 3503 if (activityRemoved) { 3504 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3505 } 3506 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, 3507 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 3508 " destroy returned removed=" + activityRemoved); 3509 return activityRemoved ? null : r; 3510 } 3511 3512 // Need to go through the full pause cycle to get this 3513 // activity into the stopped state and then finish it. 3514 if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); 3515 mStackSupervisor.mFinishingActivities.add(r); 3516 r.resumeKeyDispatchingLocked(); 3517 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3518 return r; 3519 } 3520 3521 void finishAllActivitiesLocked(boolean immediately) { 3522 boolean noActivitiesInStack = true; 3523 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3524 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3525 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3526 final ActivityRecord r = activities.get(activityNdx); 3527 noActivitiesInStack = false; 3528 if (r.finishing && !immediately) { 3529 continue; 3530 } 3531 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 3532 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3533 } 3534 } 3535 if (noActivitiesInStack) { 3536 mActivityContainer.onTaskListEmptyLocked(); 3537 } 3538 } 3539 3540 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 3541 // Basic case: for simple app-centric recents, we need to recreate 3542 // the task if the affinity has changed. 3543 if (srec == null || srec.task.affinity == null || 3544 !srec.task.affinity.equals(destAffinity)) { 3545 return true; 3546 } 3547 // Document-centric case: an app may be split in to multiple documents; 3548 // they need to re-create their task if this current activity is the root 3549 // of a document, unless simply finishing it will return them to the the 3550 // correct app behind. 3551 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 3552 && srec.task.getBaseIntent().isDocument()) { 3553 // Okay, this activity is at the root of its task. What to do, what to do... 3554 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 3555 // Finishing won't return to an application, so we need to recreate. 3556 return true; 3557 } 3558 // We now need to get the task below it to determine what to do. 3559 int taskIdx = mTaskHistory.indexOf(srec.task); 3560 if (taskIdx <= 0) { 3561 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 3562 return false; 3563 } 3564 if (taskIdx == 0) { 3565 // At the bottom of the stack, nothing to go back to. 3566 return true; 3567 } 3568 TaskRecord prevTask = mTaskHistory.get(taskIdx); 3569 if (!srec.task.affinity.equals(prevTask.affinity)) { 3570 // These are different apps, so need to recreate. 3571 return true; 3572 } 3573 } 3574 return false; 3575 } 3576 3577 final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, 3578 Intent resultData) { 3579 final TaskRecord task = srec.task; 3580 final ArrayList<ActivityRecord> activities = task.mActivities; 3581 final int start = activities.indexOf(srec); 3582 if (!mTaskHistory.contains(task) || (start < 0)) { 3583 return false; 3584 } 3585 int finishTo = start - 1; 3586 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 3587 boolean foundParentInTask = false; 3588 final ComponentName dest = destIntent.getComponent(); 3589 if (start > 0 && dest != null) { 3590 for (int i = finishTo; i >= 0; i--) { 3591 ActivityRecord r = activities.get(i); 3592 if (r.info.packageName.equals(dest.getPackageName()) && 3593 r.info.name.equals(dest.getClassName())) { 3594 finishTo = i; 3595 parent = r; 3596 foundParentInTask = true; 3597 break; 3598 } 3599 } 3600 } 3601 3602 IActivityController controller = mService.mController; 3603 if (controller != null) { 3604 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 3605 if (next != null) { 3606 // ask watcher if this is allowed 3607 boolean resumeOK = true; 3608 try { 3609 resumeOK = controller.activityResuming(next.packageName); 3610 } catch (RemoteException e) { 3611 mService.mController = null; 3612 Watchdog.getInstance().setActivityController(null); 3613 } 3614 3615 if (!resumeOK) { 3616 return false; 3617 } 3618 } 3619 } 3620 final long origId = Binder.clearCallingIdentity(); 3621 for (int i = start; i > finishTo; i--) { 3622 ActivityRecord r = activities.get(i); 3623 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 3624 // Only return the supplied result for the first activity finished 3625 resultCode = Activity.RESULT_CANCELED; 3626 resultData = null; 3627 } 3628 3629 if (parent != null && foundParentInTask) { 3630 final int parentLaunchMode = parent.info.launchMode; 3631 final int destIntentFlags = destIntent.getFlags(); 3632 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 3633 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 3634 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 3635 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 3636 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 3637 srec.packageName); 3638 } else { 3639 try { 3640 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 3641 destIntent.getComponent(), 0, srec.userId); 3642 int res = mService.mActivityStarter.startActivityLocked(srec.app.thread, 3643 destIntent, null /*ephemeralIntent*/, null, aInfo, null /*rInfo*/, null, 3644 null, parent.appToken, null, 0, -1, parent.launchedFromUid, 3645 parent.launchedFromPackage, -1, parent.launchedFromUid, 0, null, 3646 false, true, null, null, null); 3647 foundParentInTask = res == ActivityManager.START_SUCCESS; 3648 } catch (RemoteException e) { 3649 foundParentInTask = false; 3650 } 3651 requestFinishActivityLocked(parent.appToken, resultCode, 3652 resultData, "navigate-top", true); 3653 } 3654 } 3655 Binder.restoreCallingIdentity(origId); 3656 return foundParentInTask; 3657 } 3658 /** 3659 * Perform the common clean-up of an activity record. This is called both 3660 * as part of destroyActivityLocked() (when destroying the client-side 3661 * representation) and cleaning things up as a result of its hosting 3662 * processing going away, in which case there is no remaining client-side 3663 * state to destroy so only the cleanup here is needed. 3664 * 3665 * Note: Call before #removeActivityFromHistoryLocked. 3666 */ 3667 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 3668 boolean setState) { 3669 if (mResumedActivity == r) { 3670 mResumedActivity = null; 3671 } 3672 if (mPausingActivity == r) { 3673 mPausingActivity = null; 3674 } 3675 mService.resetFocusedActivityIfNeededLocked(r); 3676 3677 r.deferRelaunchUntilPaused = false; 3678 r.frozenBeforeDestroy = false; 3679 3680 if (setState) { 3681 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)"); 3682 r.state = ActivityState.DESTROYED; 3683 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r); 3684 r.app = null; 3685 } 3686 3687 // Make sure this record is no longer in the pending finishes list. 3688 // This could happen, for example, if we are trimming activities 3689 // down to the max limit while they are still waiting to finish. 3690 mStackSupervisor.mFinishingActivities.remove(r); 3691 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3692 3693 // Remove any pending results. 3694 if (r.finishing && r.pendingResults != null) { 3695 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3696 PendingIntentRecord rec = apr.get(); 3697 if (rec != null) { 3698 mService.cancelIntentSenderLocked(rec, false); 3699 } 3700 } 3701 r.pendingResults = null; 3702 } 3703 3704 if (cleanServices) { 3705 cleanUpActivityServicesLocked(r); 3706 } 3707 3708 // Get rid of any pending idle timeouts. 3709 removeTimeoutsForActivityLocked(r); 3710 if (getVisibleBehindActivity() == r) { 3711 mStackSupervisor.requestVisibleBehindLocked(r, false); 3712 } 3713 } 3714 3715 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3716 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3717 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3718 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3719 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3720 r.finishLaunchTickingLocked(); 3721 } 3722 3723 private void removeActivityFromHistoryLocked(ActivityRecord r, String reason) { 3724 mStackSupervisor.removeChildActivityContainers(r); 3725 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3726 r.makeFinishingLocked(); 3727 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3728 "Removing activity " + r + " from stack callers=" + Debug.getCallers(5)); 3729 3730 r.takeFromHistory(); 3731 removeTimeoutsForActivityLocked(r); 3732 if (DEBUG_STATES) Slog.v(TAG_STATES, 3733 "Moving to DESTROYED: " + r + " (removed from history)"); 3734 r.state = ActivityState.DESTROYED; 3735 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r); 3736 r.app = null; 3737 mWindowManager.removeAppToken(r.appToken); 3738 if (VALIDATE_TOKENS) { 3739 validateAppTokensLocked(); 3740 } 3741 final TaskRecord task = r.task; 3742 if (task != null && task.removeActivity(r)) { 3743 if (DEBUG_STACK) Slog.i(TAG_STACK, 3744 "removeActivityFromHistoryLocked: last activity removed from " + this); 3745 if (mStackSupervisor.isFocusedStack(this) && task == topTask() && 3746 task.isOverHomeStack()) { 3747 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); 3748 } 3749 removeTask(task, reason); 3750 } 3751 cleanUpActivityServicesLocked(r); 3752 r.removeUriPermissionsLocked(); 3753 } 3754 3755 /** 3756 * Perform clean-up of service connections in an activity record. 3757 */ 3758 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3759 // Throw away any services that have been bound by this activity. 3760 if (r.connections != null) { 3761 Iterator<ConnectionRecord> it = r.connections.iterator(); 3762 while (it.hasNext()) { 3763 ConnectionRecord c = it.next(); 3764 mService.mServices.removeConnectionLocked(c, null, r); 3765 } 3766 r.connections = null; 3767 } 3768 } 3769 3770 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3771 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3772 msg.obj = new ScheduleDestroyArgs(owner, reason); 3773 mHandler.sendMessage(msg); 3774 } 3775 3776 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3777 boolean lastIsOpaque = false; 3778 boolean activityRemoved = false; 3779 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3780 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3781 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3782 final ActivityRecord r = activities.get(activityNdx); 3783 if (r.finishing) { 3784 continue; 3785 } 3786 if (r.fullscreen) { 3787 lastIsOpaque = true; 3788 } 3789 if (owner != null && r.app != owner) { 3790 continue; 3791 } 3792 if (!lastIsOpaque) { 3793 continue; 3794 } 3795 if (r.isDestroyable()) { 3796 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state 3797 + " resumed=" + mResumedActivity 3798 + " pausing=" + mPausingActivity + " for reason " + reason); 3799 if (destroyActivityLocked(r, true, reason)) { 3800 activityRemoved = true; 3801 } 3802 } 3803 } 3804 } 3805 if (activityRemoved) { 3806 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3807 } 3808 } 3809 3810 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3811 if (r.isDestroyable()) { 3812 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 3813 "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity 3814 + " pausing=" + mPausingActivity + " for reason " + reason); 3815 return destroyActivityLocked(r, true, reason); 3816 } 3817 return false; 3818 } 3819 3820 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3821 String reason) { 3822 // Iterate over tasks starting at the back (oldest) first. 3823 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app); 3824 int maxTasks = tasks.size() / 4; 3825 if (maxTasks < 1) { 3826 maxTasks = 1; 3827 } 3828 int numReleased = 0; 3829 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3830 final TaskRecord task = mTaskHistory.get(taskNdx); 3831 if (!tasks.contains(task)) { 3832 continue; 3833 } 3834 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task); 3835 int curNum = 0; 3836 final ArrayList<ActivityRecord> activities = task.mActivities; 3837 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3838 final ActivityRecord activity = activities.get(actNdx); 3839 if (activity.app == app && activity.isDestroyable()) { 3840 if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity 3841 + " in state " + activity.state + " resumed=" + mResumedActivity 3842 + " pausing=" + mPausingActivity + " for reason " + reason); 3843 destroyActivityLocked(activity, true, reason); 3844 if (activities.get(actNdx) != activity) { 3845 // Was removed from list, back up so we don't miss the next one. 3846 actNdx--; 3847 } 3848 curNum++; 3849 } 3850 } 3851 if (curNum > 0) { 3852 numReleased += curNum; 3853 maxTasks--; 3854 if (mTaskHistory.get(taskNdx) != task) { 3855 // The entire task got removed, back up so we don't miss the next one. 3856 taskNdx--; 3857 } 3858 } 3859 } 3860 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, 3861 "Done releasing: did " + numReleased + " activities"); 3862 return numReleased; 3863 } 3864 3865 /** 3866 * Destroy the current CLIENT SIDE instance of an activity. This may be 3867 * called both when actually finishing an activity, or when performing 3868 * a configuration switch where we destroy the current client-side object 3869 * but then create a new client-side object for this same HistoryRecord. 3870 */ 3871 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3872 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH, 3873 "Removing activity from " + reason + ": token=" + r 3874 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3875 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3876 r.userId, System.identityHashCode(r), 3877 r.task.taskId, r.shortComponentName, reason); 3878 3879 boolean removedFromHistory = false; 3880 3881 cleanUpActivityLocked(r, false, false); 3882 3883 final boolean hadApp = r.app != null; 3884 3885 if (hadApp) { 3886 if (removeFromApp) { 3887 r.app.activities.remove(r); 3888 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3889 mService.mHeavyWeightProcess = null; 3890 mService.mHandler.sendEmptyMessage( 3891 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3892 } 3893 if (r.app.activities.isEmpty()) { 3894 // Update any services we are bound to that might care about whether 3895 // their client may have activities. 3896 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3897 // No longer have activities, so update LRU list and oom adj. 3898 mService.updateLruProcessLocked(r.app, false, null); 3899 mService.updateOomAdjLocked(); 3900 } 3901 } 3902 3903 boolean skipDestroy = false; 3904 3905 try { 3906 if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r); 3907 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3908 r.configChangeFlags); 3909 } catch (Exception e) { 3910 // We can just ignore exceptions here... if the process 3911 // has crashed, our death notification will clean things 3912 // up. 3913 //Slog.w(TAG, "Exception thrown during finish", e); 3914 if (r.finishing) { 3915 removeActivityFromHistoryLocked(r, reason + " exceptionInScheduleDestroy"); 3916 removedFromHistory = true; 3917 skipDestroy = true; 3918 } 3919 } 3920 3921 r.nowVisible = false; 3922 3923 // If the activity is finishing, we need to wait on removing it 3924 // from the list to give it a chance to do its cleanup. During 3925 // that time it may make calls back with its token so we need to 3926 // be able to find it on the list and so we don't want to remove 3927 // it from the list yet. Otherwise, we can just immediately put 3928 // it in the destroyed state since we are not removing it from the 3929 // list. 3930 if (r.finishing && !skipDestroy) { 3931 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r 3932 + " (destroy requested)"); 3933 r.state = ActivityState.DESTROYING; 3934 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3935 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3936 } else { 3937 if (DEBUG_STATES) Slog.v(TAG_STATES, 3938 "Moving to DESTROYED: " + r + " (destroy skipped)"); 3939 r.state = ActivityState.DESTROYED; 3940 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 3941 r.app = null; 3942 } 3943 } else { 3944 // remove this record from the history. 3945 if (r.finishing) { 3946 removeActivityFromHistoryLocked(r, reason + " hadNoApp"); 3947 removedFromHistory = true; 3948 } else { 3949 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)"); 3950 r.state = ActivityState.DESTROYED; 3951 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 3952 r.app = null; 3953 } 3954 } 3955 3956 r.configChangeFlags = 0; 3957 3958 if (!mLRUActivities.remove(r) && hadApp) { 3959 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 3960 } 3961 3962 return removedFromHistory; 3963 } 3964 3965 final void activityDestroyedLocked(IBinder token, String reason) { 3966 final long origId = Binder.clearCallingIdentity(); 3967 try { 3968 ActivityRecord r = ActivityRecord.forTokenLocked(token); 3969 if (r != null) { 3970 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3971 } 3972 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r); 3973 3974 if (isInStackLocked(r) != null) { 3975 if (r.state == ActivityState.DESTROYING) { 3976 cleanUpActivityLocked(r, true, false); 3977 removeActivityFromHistoryLocked(r, reason); 3978 } 3979 } 3980 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3981 } finally { 3982 Binder.restoreCallingIdentity(origId); 3983 } 3984 } 3985 3986 void releaseBackgroundResources(ActivityRecord r) { 3987 if (hasVisibleBehindActivity() && 3988 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 3989 if (r == topRunningActivityLocked() 3990 && getStackVisibilityLocked(null) == STACK_VISIBLE) { 3991 // Don't release the top activity if it has requested to run behind the next 3992 // activity and the stack is currently visible. 3993 return; 3994 } 3995 if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" + 3996 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 3997 " thread=" + r.app.thread); 3998 if (r != null && r.app != null && r.app.thread != null) { 3999 try { 4000 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 4001 } catch (RemoteException e) { 4002 } 4003 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 4004 } else { 4005 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 4006 backgroundResourcesReleased(); 4007 } 4008 } 4009 } 4010 4011 final void backgroundResourcesReleased() { 4012 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 4013 final ActivityRecord r = getVisibleBehindActivity(); 4014 if (r != null) { 4015 mStackSupervisor.mStoppingActivities.add(r); 4016 setVisibleBehindActivity(null); 4017 mStackSupervisor.scheduleIdleTimeoutLocked(null); 4018 } 4019 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4020 } 4021 4022 boolean hasVisibleBehindActivity() { 4023 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 4024 } 4025 4026 void setVisibleBehindActivity(ActivityRecord r) { 4027 if (isAttached()) { 4028 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 4029 } 4030 } 4031 4032 ActivityRecord getVisibleBehindActivity() { 4033 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 4034 } 4035 4036 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 4037 ProcessRecord app, String listName) { 4038 int i = list.size(); 4039 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4040 "Removing app " + app + " from list " + listName + " with " + i + " entries"); 4041 while (i > 0) { 4042 i--; 4043 ActivityRecord r = list.get(i); 4044 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); 4045 if (r.app == app) { 4046 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); 4047 list.remove(i); 4048 removeTimeoutsForActivityLocked(r); 4049 } 4050 } 4051 } 4052 4053 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 4054 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 4055 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 4056 "mStoppingActivities"); 4057 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 4058 "mGoingToSleepActivities"); 4059 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 4060 "mWaitingVisibleActivities"); 4061 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 4062 "mFinishingActivities"); 4063 4064 boolean hasVisibleActivities = false; 4065 4066 // Clean out the history list. 4067 int i = numActivities(); 4068 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4069 "Removing app " + app + " from history with " + i + " entries"); 4070 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4071 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4072 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4073 final ActivityRecord r = activities.get(activityNdx); 4074 --i; 4075 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4076 "Record #" + i + " " + r + ": app=" + r.app); 4077 if (r.app == app) { 4078 if (r.visible) { 4079 hasVisibleActivities = true; 4080 } 4081 final boolean remove; 4082 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 4083 // Don't currently have state for the activity, or 4084 // it is finishing -- always remove it. 4085 remove = true; 4086 } else if (!r.visible && r.launchCount > 2 && 4087 r.lastLaunchTime > (SystemClock.uptimeMillis() - 60000)) { 4088 // We have launched this activity too many times since it was 4089 // able to run, so give up and remove it. 4090 // (Note if the activity is visible, we don't remove the record. 4091 // We leave the dead window on the screen but the process will 4092 // not be restarted unless user explicitly tap on it.) 4093 remove = true; 4094 } else { 4095 // The process may be gone, but the activity lives on! 4096 remove = false; 4097 } 4098 if (remove) { 4099 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE, 4100 "Removing activity " + r + " from stack at " + i 4101 + ": haveState=" + r.haveState 4102 + " stateNotNeeded=" + r.stateNotNeeded 4103 + " finishing=" + r.finishing 4104 + " state=" + r.state + " callers=" + Debug.getCallers(5)); 4105 if (!r.finishing) { 4106 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 4107 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 4108 r.userId, System.identityHashCode(r), 4109 r.task.taskId, r.shortComponentName, 4110 "proc died without state saved"); 4111 if (r.state == ActivityState.RESUMED) { 4112 mService.updateUsageStats(r, false); 4113 } 4114 } 4115 } else { 4116 // We have the current state for this activity, so 4117 // it can be restarted later when needed. 4118 if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null"); 4119 if (DEBUG_APP) Slog.v(TAG_APP, 4120 "Clearing app during removeHistory for activity " + r); 4121 r.app = null; 4122 // Set nowVisible to previous visible state. If the app was visible while 4123 // it died, we leave the dead window on screen so it's basically visible. 4124 // This is needed when user later tap on the dead window, we need to stop 4125 // other apps when user transfers focus to the restarted activity. 4126 r.nowVisible = r.visible; 4127 if (!r.haveState) { 4128 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 4129 "App died, clearing saved state of " + r); 4130 r.icicle = null; 4131 } 4132 } 4133 cleanUpActivityLocked(r, true, true); 4134 if (remove) { 4135 removeActivityFromHistoryLocked(r, "appDied"); 4136 } 4137 } 4138 } 4139 } 4140 4141 return hasVisibleActivities; 4142 } 4143 4144 final void updateTransitLocked(int transit, ActivityOptions options) { 4145 if (options != null) { 4146 ActivityRecord r = topRunningActivityLocked(); 4147 if (r != null && r.state != ActivityState.RESUMED) { 4148 r.updateOptionsLocked(options); 4149 } else { 4150 ActivityOptions.abort(options); 4151 } 4152 } 4153 mWindowManager.prepareAppTransition(transit, false); 4154 } 4155 4156 void updateTaskMovement(TaskRecord task, boolean toFront) { 4157 if (task.isPersistable) { 4158 task.mLastTimeMoved = System.currentTimeMillis(); 4159 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 4160 // recently will be most negative, tasks sent to the bottom before that will be less 4161 // negative. Similarly for recent tasks moved to the top which will be most positive. 4162 if (!toFront) { 4163 task.mLastTimeMoved *= -1; 4164 } 4165 } 4166 mStackSupervisor.invalidateTaskLayers(); 4167 } 4168 4169 void moveHomeStackTaskToTop(int homeStackTaskType) { 4170 final int top = mTaskHistory.size() - 1; 4171 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 4172 final TaskRecord task = mTaskHistory.get(taskNdx); 4173 if (task.taskType == homeStackTaskType) { 4174 if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK, 4175 "moveHomeStackTaskToTop: moving " + task); 4176 mTaskHistory.remove(taskNdx); 4177 mTaskHistory.add(top, task); 4178 updateTaskMovement(task, true); 4179 return; 4180 } 4181 } 4182 } 4183 4184 final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, ActivityOptions options, 4185 AppTimeTracker timeTracker, String reason) { 4186 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr); 4187 4188 final int numTasks = mTaskHistory.size(); 4189 final int index = mTaskHistory.indexOf(tr); 4190 if (numTasks == 0 || index < 0) { 4191 // nothing to do! 4192 if (noAnimation) { 4193 ActivityOptions.abort(options); 4194 } else { 4195 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4196 } 4197 return; 4198 } 4199 4200 if (timeTracker != null) { 4201 // The caller wants a time tracker associated with this task. 4202 for (int i = tr.mActivities.size() - 1; i >= 0; i--) { 4203 tr.mActivities.get(i).appTimeTracker = timeTracker; 4204 } 4205 } 4206 4207 // Shift all activities with this task up to the top 4208 // of the stack, keeping them in the same internal order. 4209 insertTaskAtTop(tr, null); 4210 4211 // Don't refocus if invisible to current user 4212 ActivityRecord top = tr.getTopActivity(); 4213 if (!okToShowLocked(top)) { 4214 addRecentActivityLocked(top); 4215 ActivityOptions.abort(options); 4216 return; 4217 } 4218 4219 // Set focus to the top running activity of this stack. 4220 ActivityRecord r = topRunningActivityLocked(); 4221 mService.setFocusedActivityLocked(r, reason); 4222 4223 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr); 4224 if (noAnimation) { 4225 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 4226 if (r != null) { 4227 mNoAnimActivities.add(r); 4228 } 4229 ActivityOptions.abort(options); 4230 } else { 4231 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4232 } 4233 4234 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4235 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 4236 4237 if (VALIDATE_TOKENS) { 4238 validateAppTokensLocked(); 4239 } 4240 } 4241 4242 /** 4243 * Worker method for rearranging history stack. Implements the function of moving all 4244 * activities for a specific task (gathering them if disjoint) into a single group at the 4245 * bottom of the stack. 4246 * 4247 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 4248 * to premeptively cancel the move. 4249 * 4250 * @param taskId The taskId to collect and move to the bottom. 4251 * @return Returns true if the move completed, false if not. 4252 */ 4253 final boolean moveTaskToBackLocked(int taskId) { 4254 final TaskRecord tr = taskForIdLocked(taskId); 4255 if (tr == null) { 4256 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 4257 return false; 4258 } 4259 4260 Slog.i(TAG, "moveTaskToBack: " + tr); 4261 mStackSupervisor.removeLockedTaskLocked(tr); 4262 4263 // If we have a watcher, preflight the move before committing to it. First check 4264 // for *other* available tasks, but if none are available, then try again allowing the 4265 // current task to be selected. 4266 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 4267 ActivityRecord next = topRunningActivityLocked(null, taskId); 4268 if (next == null) { 4269 next = topRunningActivityLocked(null, 0); 4270 } 4271 if (next != null) { 4272 // ask watcher if this is allowed 4273 boolean moveOK = true; 4274 try { 4275 moveOK = mService.mController.activityResuming(next.packageName); 4276 } catch (RemoteException e) { 4277 mService.mController = null; 4278 Watchdog.getInstance().setActivityController(null); 4279 } 4280 if (!moveOK) { 4281 return false; 4282 } 4283 } 4284 } 4285 4286 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId); 4287 4288 if (mStackId == HOME_STACK_ID && topTask().isHomeTask()) { 4289 // For the case where we are moving the home task back and there is an activity visible 4290 // behind it on the fullscreen stack, we want to move the focus to the visible behind 4291 // activity to maintain order with what the user is seeing. 4292 final ActivityStack fullscreenStack = 4293 mStackSupervisor.getStack(FULLSCREEN_WORKSPACE_STACK_ID); 4294 if (fullscreenStack != null && fullscreenStack.hasVisibleBehindActivity()) { 4295 final ActivityRecord visibleBehind = fullscreenStack.getVisibleBehindActivity(); 4296 mService.setFocusedActivityLocked(visibleBehind, "moveTaskToBack"); 4297 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4298 return true; 4299 } 4300 } 4301 4302 boolean prevIsHome = false; 4303 4304 // If true, we should resume the home activity next if the task we are moving to the 4305 // back is over the home stack. We force to false if the task we are moving to back 4306 // is the home task and we don't want it resumed after moving to the back. 4307 final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack(); 4308 if (canGoHome) { 4309 final TaskRecord nextTask = getNextTask(tr); 4310 if (nextTask != null) { 4311 nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); 4312 } else { 4313 prevIsHome = true; 4314 } 4315 } 4316 mTaskHistory.remove(tr); 4317 mTaskHistory.add(0, tr); 4318 updateTaskMovement(tr, false); 4319 4320 // There is an assumption that moving a task to the back moves it behind the home activity. 4321 // We make sure here that some activity in the stack will launch home. 4322 int numTasks = mTaskHistory.size(); 4323 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 4324 final TaskRecord task = mTaskHistory.get(taskNdx); 4325 if (task.isOverHomeStack()) { 4326 break; 4327 } 4328 if (taskNdx == 1) { 4329 // Set the last task before tr to go to home. 4330 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4331 } 4332 } 4333 4334 mWindowManager.prepareAppTransition(TRANSIT_TASK_TO_BACK, false); 4335 mWindowManager.moveTaskToBottom(taskId); 4336 4337 if (VALIDATE_TOKENS) { 4338 validateAppTokensLocked(); 4339 } 4340 4341 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 4342 if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) { 4343 if (!mService.mBooting && !mService.mBooted) { 4344 // Not ready yet! 4345 return false; 4346 } 4347 final int taskToReturnTo = tr.getTaskToReturnTo(); 4348 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 4349 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); 4350 } 4351 4352 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4353 return true; 4354 } 4355 4356 static final void logStartActivity(int tag, ActivityRecord r, 4357 TaskRecord task) { 4358 final Uri data = r.intent.getData(); 4359 final String strData = data != null ? data.toSafeString() : null; 4360 4361 EventLog.writeEvent(tag, 4362 r.userId, System.identityHashCode(r), task.taskId, 4363 r.shortComponentName, r.intent.getAction(), 4364 r.intent.getType(), strData, r.intent.getFlags()); 4365 } 4366 4367 /** 4368 * Make sure the given activity matches the current configuration. Returns 4369 * false if the activity had to be destroyed. Returns true if the 4370 * configuration is the same, or the activity will remain running as-is 4371 * for whatever reason. Ensures the HistoryRecord is updated with the 4372 * correct configuration and all other bookkeeping is handled. 4373 */ 4374 final boolean ensureActivityConfigurationLocked(ActivityRecord r, int globalChanges, 4375 boolean preserveWindow) { 4376 if (mConfigWillChange) { 4377 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4378 "Skipping config check (will change): " + r); 4379 return true; 4380 } 4381 4382 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4383 "Ensuring correct configuration: " + r); 4384 4385 // Short circuit: if the two configurations are equal (the common case), then there is 4386 // nothing to do. 4387 final Configuration newConfig = mService.mConfiguration; 4388 final Configuration taskConfig = r.task.mOverrideConfig; 4389 if (r.configuration.equals(newConfig) 4390 && r.taskConfigOverride.equals(taskConfig) 4391 && !r.forceNewConfig) { 4392 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4393 "Configuration unchanged in " + r); 4394 return true; 4395 } 4396 4397 // We don't worry about activities that are finishing. 4398 if (r.finishing) { 4399 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4400 "Configuration doesn't matter in finishing " + r); 4401 r.stopFreezingScreenLocked(false); 4402 return true; 4403 } 4404 4405 // Okay we now are going to make this activity have the new config. 4406 // But then we need to figure out how it needs to deal with that. 4407 final Configuration oldConfig = r.configuration; 4408 final Configuration oldTaskOverride = r.taskConfigOverride; 4409 r.configuration = newConfig; 4410 r.taskConfigOverride = taskConfig; 4411 4412 int taskChanges = getTaskConfigurationChanges(r, taskConfig, oldTaskOverride); 4413 final int changes = oldConfig.diff(newConfig) | taskChanges; 4414 if (changes == 0 && !r.forceNewConfig) { 4415 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4416 "Configuration no differences in " + r); 4417 // There are no significant differences, so we won't relaunch but should still deliver 4418 // the new configuration to the client process. 4419 r.scheduleConfigurationChanged(taskConfig, true); 4420 return true; 4421 } 4422 4423 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4424 "Configuration changes for " + r + " ; taskChanges=" 4425 + Configuration.configurationDiffToString(taskChanges) + ", allChanges=" 4426 + Configuration.configurationDiffToString(changes)); 4427 4428 // If the activity isn't currently running, just leave the new 4429 // configuration and it will pick that up next time it starts. 4430 if (r.app == null || r.app.thread == null) { 4431 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4432 "Configuration doesn't matter not running " + r); 4433 r.stopFreezingScreenLocked(false); 4434 r.forceNewConfig = false; 4435 return true; 4436 } 4437 4438 // Figure out how to handle the changes between the configurations. 4439 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4440 "Checking to restart " + r.info.name + ": changed=0x" 4441 + Integer.toHexString(changes) + ", handles=0x" 4442 + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig 4443 + ", taskConfig=" + taskConfig); 4444 4445 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 4446 // Aha, the activity isn't handling the change, so DIE DIE DIE. 4447 r.configChangeFlags |= changes; 4448 r.startFreezingScreenLocked(r.app, globalChanges); 4449 r.forceNewConfig = false; 4450 preserveWindow &= isResizeOnlyChange(changes); 4451 if (r.app == null || r.app.thread == null) { 4452 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4453 "Config is destroying non-running " + r); 4454 destroyActivityLocked(r, true, "config"); 4455 } else if (r.state == ActivityState.PAUSING) { 4456 // A little annoying: we are waiting for this activity to finish pausing. Let's not 4457 // do anything now, but just flag that it needs to be restarted when done pausing. 4458 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4459 "Config is skipping already pausing " + r); 4460 r.deferRelaunchUntilPaused = true; 4461 r.preserveWindowOnDeferredRelaunch = preserveWindow; 4462 return true; 4463 } else if (r.state == ActivityState.RESUMED) { 4464 // Try to optimize this case: the configuration is changing and we need to restart 4465 // the top, resumed activity. Instead of doing the normal handshaking, just say 4466 // "restart!". 4467 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4468 "Config is relaunching resumed " + r); 4469 4470 if (DEBUG_STATES && !r.visible) { 4471 Slog.v(TAG_STATES, "Config is relaunching resumed invisible activity " + r 4472 + " called by " + Debug.getCallers(4)); 4473 } 4474 4475 relaunchActivityLocked(r, r.configChangeFlags, true, preserveWindow); 4476 } else { 4477 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4478 "Config is relaunching non-resumed " + r); 4479 relaunchActivityLocked(r, r.configChangeFlags, false, preserveWindow); 4480 } 4481 4482 // All done... tell the caller we weren't able to keep this activity around. 4483 return false; 4484 } 4485 4486 // Default case: the activity can handle this new configuration, so hand it over. 4487 // NOTE: We only forward the task override configuration as the system level configuration 4488 // changes is always sent to all processes when they happen so it can just use whatever 4489 // system level configuration it last got. 4490 r.scheduleConfigurationChanged(taskConfig, true); 4491 r.stopFreezingScreenLocked(false); 4492 4493 return true; 4494 } 4495 4496 private int getTaskConfigurationChanges(ActivityRecord record, Configuration taskConfig, 4497 Configuration oldTaskOverride) { 4498 4499 // If we went from full-screen to non-full-screen, make sure to use the correct 4500 // configuration task diff, so the diff stays as small as possible. 4501 if (Configuration.EMPTY.equals(oldTaskOverride) 4502 && !Configuration.EMPTY.equals(taskConfig)) { 4503 oldTaskOverride = record.task.extractOverrideConfig(record.configuration); 4504 } 4505 4506 // Conversely, do the same when going the other direction. 4507 if (Configuration.EMPTY.equals(taskConfig) 4508 && !Configuration.EMPTY.equals(oldTaskOverride)) { 4509 taskConfig = record.task.extractOverrideConfig(record.configuration); 4510 } 4511 4512 // Determine what has changed. May be nothing, if this is a config 4513 // that has come back from the app after going idle. In that case 4514 // we just want to leave the official config object now in the 4515 // activity and do nothing else. 4516 int taskChanges = oldTaskOverride.diff(taskConfig); 4517 // We don't want to use size changes if they don't cross boundaries that are important to 4518 // the app. 4519 if ((taskChanges & CONFIG_SCREEN_SIZE) != 0) { 4520 final boolean crosses = record.crossesHorizontalSizeThreshold( 4521 oldTaskOverride.screenWidthDp, taskConfig.screenWidthDp) 4522 || record.crossesVerticalSizeThreshold( 4523 oldTaskOverride.screenHeightDp, taskConfig.screenHeightDp); 4524 if (!crosses) { 4525 taskChanges &= ~CONFIG_SCREEN_SIZE; 4526 } 4527 } 4528 if ((taskChanges & CONFIG_SMALLEST_SCREEN_SIZE) != 0) { 4529 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4530 final int newSmallest = taskConfig.smallestScreenWidthDp; 4531 if (!record.crossesSmallestSizeThreshold(oldSmallest, newSmallest)) { 4532 taskChanges &= ~CONFIG_SMALLEST_SCREEN_SIZE; 4533 } 4534 } 4535 return catchConfigChangesFromUnset(taskConfig, oldTaskOverride, taskChanges); 4536 } 4537 4538 private static int catchConfigChangesFromUnset(Configuration taskConfig, 4539 Configuration oldTaskOverride, int taskChanges) { 4540 if (taskChanges == 0) { 4541 // {@link Configuration#diff} doesn't catch changes from unset values. 4542 // Check for changes we care about. 4543 if (oldTaskOverride.orientation != taskConfig.orientation) { 4544 taskChanges |= CONFIG_ORIENTATION; 4545 } 4546 // We want to explicitly track situations where the size configuration goes from 4547 // undefined to defined. We don't care about crossing the threshold in that case, 4548 // because there is no threshold. 4549 final int oldHeight = oldTaskOverride.screenHeightDp; 4550 final int newHeight = taskConfig.screenHeightDp; 4551 final int undefinedHeight = Configuration.SCREEN_HEIGHT_DP_UNDEFINED; 4552 if ((oldHeight == undefinedHeight && newHeight != undefinedHeight) 4553 || (oldHeight != undefinedHeight && newHeight == undefinedHeight)) { 4554 taskChanges |= CONFIG_SCREEN_SIZE; 4555 } 4556 final int oldWidth = oldTaskOverride.screenWidthDp; 4557 final int newWidth = taskConfig.screenWidthDp; 4558 final int undefinedWidth = Configuration.SCREEN_WIDTH_DP_UNDEFINED; 4559 if ((oldWidth == undefinedWidth && newWidth != undefinedWidth) 4560 || (oldWidth != undefinedWidth && newWidth == undefinedWidth)) { 4561 taskChanges |= CONFIG_SCREEN_SIZE; 4562 } 4563 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4564 final int newSmallest = taskConfig.smallestScreenWidthDp; 4565 final int undefinedSmallest = Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED; 4566 if ((oldSmallest == undefinedSmallest && newSmallest != undefinedSmallest) 4567 || (oldSmallest != undefinedSmallest && newSmallest == undefinedSmallest)) { 4568 taskChanges |= CONFIG_SMALLEST_SCREEN_SIZE; 4569 } 4570 final int oldLayout = oldTaskOverride.screenLayout; 4571 final int newLayout = taskConfig.screenLayout; 4572 if ((oldLayout == SCREENLAYOUT_UNDEFINED && newLayout != SCREENLAYOUT_UNDEFINED) 4573 || (oldLayout != SCREENLAYOUT_UNDEFINED && newLayout == SCREENLAYOUT_UNDEFINED)) { 4574 taskChanges |= CONFIG_SCREEN_LAYOUT; 4575 } 4576 } 4577 return taskChanges; 4578 } 4579 4580 private static boolean isResizeOnlyChange(int change) { 4581 return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION 4582 | CONFIG_SCREEN_LAYOUT)) == 0; 4583 } 4584 4585 private void relaunchActivityLocked( 4586 ActivityRecord r, int changes, boolean andResume, boolean preserveWindow) { 4587 if (mService.mSuppressResizeConfigChanges && preserveWindow) { 4588 r.configChangeFlags = 0; 4589 return; 4590 } 4591 4592 List<ResultInfo> results = null; 4593 List<ReferrerIntent> newIntents = null; 4594 if (andResume) { 4595 results = r.results; 4596 newIntents = r.newIntents; 4597 } 4598 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 4599 "Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents 4600 + " andResume=" + andResume + " preserveWindow=" + preserveWindow); 4601 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 4602 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 4603 r.task.taskId, r.shortComponentName); 4604 4605 r.startFreezingScreenLocked(r.app, 0); 4606 4607 mStackSupervisor.removeChildActivityContainers(r); 4608 4609 try { 4610 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, 4611 "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r 4612 + " callers=" + Debug.getCallers(6)); 4613 r.forceNewConfig = false; 4614 mStackSupervisor.activityRelaunchingLocked(r); 4615 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, 4616 !andResume, new Configuration(mService.mConfiguration), 4617 new Configuration(r.task.mOverrideConfig), preserveWindow); 4618 // Note: don't need to call pauseIfSleepingLocked() here, because 4619 // the caller will only pass in 'andResume' if this activity is 4620 // currently resumed, which implies we aren't sleeping. 4621 } catch (RemoteException e) { 4622 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e); 4623 } 4624 4625 if (andResume) { 4626 if (DEBUG_STATES) { 4627 Slog.d(TAG_STATES, "Resumed after relaunch " + r); 4628 } 4629 r.state = ActivityState.RESUMED; 4630 // Relaunch-resume could happen either when the app is already in the front, 4631 // or while it's being brought to front. In the latter case, it's marked RESUMED 4632 // but not yet visible (or stopped). We need to complete the resume here as the 4633 // code in resumeTopActivityInnerLocked to complete the resume might be skipped. 4634 if (!r.visible || r.stopped) { 4635 mWindowManager.setAppVisibility(r.appToken, true); 4636 completeResumeLocked(r); 4637 } else { 4638 r.results = null; 4639 r.newIntents = null; 4640 } 4641 } else { 4642 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 4643 r.state = ActivityState.PAUSED; 4644 } 4645 4646 r.configChangeFlags = 0; 4647 r.deferRelaunchUntilPaused = false; 4648 r.preserveWindowOnDeferredRelaunch = false; 4649 } 4650 4651 boolean willActivityBeVisibleLocked(IBinder token) { 4652 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4653 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4654 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4655 final ActivityRecord r = activities.get(activityNdx); 4656 if (r.appToken == token) { 4657 return true; 4658 } 4659 if (r.fullscreen && !r.finishing) { 4660 return false; 4661 } 4662 } 4663 } 4664 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 4665 if (r == null) { 4666 return false; 4667 } 4668 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 4669 + " would have returned true for r=" + r); 4670 return !r.finishing; 4671 } 4672 4673 void closeSystemDialogsLocked() { 4674 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4675 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4676 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4677 final ActivityRecord r = activities.get(activityNdx); 4678 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 4679 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 4680 } 4681 } 4682 } 4683 } 4684 4685 boolean finishDisabledPackageActivitiesLocked(String packageName, Set<String> filterByClasses, 4686 boolean doit, boolean evenPersistent, int userId) { 4687 boolean didSomething = false; 4688 TaskRecord lastTask = null; 4689 ComponentName homeActivity = null; 4690 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4691 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4692 int numActivities = activities.size(); 4693 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 4694 ActivityRecord r = activities.get(activityNdx); 4695 final boolean sameComponent = 4696 (r.packageName.equals(packageName) && (filterByClasses == null 4697 || filterByClasses.contains(r.realActivity.getClassName()))) 4698 || (packageName == null && r.userId == userId); 4699 if ((userId == UserHandle.USER_ALL || r.userId == userId) 4700 && (sameComponent || r.task == lastTask) 4701 && (r.app == null || evenPersistent || !r.app.persistent)) { 4702 if (!doit) { 4703 if (r.finishing) { 4704 // If this activity is just finishing, then it is not 4705 // interesting as far as something to stop. 4706 continue; 4707 } 4708 return true; 4709 } 4710 if (r.isHomeActivity()) { 4711 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 4712 Slog.i(TAG, "Skip force-stop again " + r); 4713 continue; 4714 } else { 4715 homeActivity = r.realActivity; 4716 } 4717 } 4718 didSomething = true; 4719 Slog.i(TAG, " Force finishing activity " + r); 4720 if (sameComponent) { 4721 if (r.app != null) { 4722 r.app.removed = true; 4723 } 4724 r.app = null; 4725 } 4726 lastTask = r.task; 4727 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 4728 true)) { 4729 // r has been deleted from mActivities, accommodate. 4730 --numActivities; 4731 --activityNdx; 4732 } 4733 } 4734 } 4735 } 4736 return didSomething; 4737 } 4738 4739 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 4740 boolean focusedStack = mStackSupervisor.getFocusedStack() == this; 4741 boolean topTask = true; 4742 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4743 final TaskRecord task = mTaskHistory.get(taskNdx); 4744 if (task.getTopActivity() == null) { 4745 continue; 4746 } 4747 ActivityRecord r = null; 4748 ActivityRecord top = null; 4749 ActivityRecord tmp; 4750 int numActivities = 0; 4751 int numRunning = 0; 4752 final ArrayList<ActivityRecord> activities = task.mActivities; 4753 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 4754 continue; 4755 } 4756 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4757 tmp = activities.get(activityNdx); 4758 if (tmp.finishing) { 4759 continue; 4760 } 4761 r = tmp; 4762 4763 // Initialize state for next task if needed. 4764 if (top == null || (top.state == ActivityState.INITIALIZING)) { 4765 top = r; 4766 numActivities = numRunning = 0; 4767 } 4768 4769 // Add 'r' into the current task. 4770 numActivities++; 4771 if (r.app != null && r.app.thread != null) { 4772 numRunning++; 4773 } 4774 4775 if (DEBUG_ALL) Slog.v( 4776 TAG, r.intent.getComponent().flattenToShortString() 4777 + ": task=" + r.task); 4778 } 4779 4780 RunningTaskInfo ci = new RunningTaskInfo(); 4781 ci.id = task.taskId; 4782 ci.stackId = mStackId; 4783 ci.baseActivity = r.intent.getComponent(); 4784 ci.topActivity = top.intent.getComponent(); 4785 ci.lastActiveTime = task.lastActiveTime; 4786 if (focusedStack && topTask) { 4787 // Give the latest time to ensure foreground task can be sorted 4788 // at the first, because lastActiveTime of creating task is 0. 4789 ci.lastActiveTime = System.currentTimeMillis(); 4790 topTask = false; 4791 } 4792 4793 if (top.task != null) { 4794 ci.description = top.task.lastDescription; 4795 } 4796 ci.numActivities = numActivities; 4797 ci.numRunning = numRunning; 4798 ci.isDockable = task.canGoInDockedStack(); 4799 ci.resizeMode = task.mResizeMode; 4800 list.add(ci); 4801 } 4802 } 4803 4804 public void unhandledBackLocked() { 4805 final int top = mTaskHistory.size() - 1; 4806 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top); 4807 if (top >= 0) { 4808 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 4809 int activityTop = activities.size() - 1; 4810 if (activityTop > 0) { 4811 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 4812 "unhandled-back", true); 4813 } 4814 } 4815 } 4816 4817 /** 4818 * Reset local parameters because an app's activity died. 4819 * @param app The app of the activity that died. 4820 * @return result from removeHistoryRecordsForAppLocked. 4821 */ 4822 boolean handleAppDiedLocked(ProcessRecord app) { 4823 if (mPausingActivity != null && mPausingActivity.app == app) { 4824 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE, 4825 "App died while pausing: " + mPausingActivity); 4826 mPausingActivity = null; 4827 } 4828 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 4829 mLastPausedActivity = null; 4830 mLastNoHistoryActivity = null; 4831 } 4832 4833 return removeHistoryRecordsForAppLocked(app); 4834 } 4835 4836 void handleAppCrashLocked(ProcessRecord app) { 4837 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4838 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4839 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4840 final ActivityRecord r = activities.get(activityNdx); 4841 if (r.app == app) { 4842 Slog.w(TAG, " Force finishing activity " 4843 + r.intent.getComponent().flattenToShortString()); 4844 // Force the destroy to skip right to removal. 4845 r.app = null; 4846 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4847 } 4848 } 4849 } 4850 } 4851 4852 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4853 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4854 boolean printed = false; 4855 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4856 final TaskRecord task = mTaskHistory.get(taskNdx); 4857 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4858 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4859 dumpClient, dumpPackage, needSep, header, 4860 " Task id #" + task.taskId + "\n" + 4861 " mFullscreen=" + task.mFullscreen + "\n" + 4862 " mBounds=" + task.mBounds + "\n" + 4863 " mMinimalWidth=" + task.mMinimalWidth + "\n" + 4864 " mMinimalHeight=" + task.mMinimalHeight + "\n" + 4865 " mLastNonFullscreenBounds=" + task.mLastNonFullscreenBounds); 4866 if (printed) { 4867 header = null; 4868 } 4869 } 4870 return printed; 4871 } 4872 4873 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4874 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4875 4876 if ("all".equals(name)) { 4877 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4878 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4879 } 4880 } else if ("top".equals(name)) { 4881 final int top = mTaskHistory.size() - 1; 4882 if (top >= 0) { 4883 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4884 int listTop = list.size() - 1; 4885 if (listTop >= 0) { 4886 activities.add(list.get(listTop)); 4887 } 4888 } 4889 } else { 4890 ItemMatcher matcher = new ItemMatcher(); 4891 matcher.build(name); 4892 4893 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4894 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4895 if (matcher.match(r1, r1.intent.getComponent())) { 4896 activities.add(r1); 4897 } 4898 } 4899 } 4900 } 4901 4902 return activities; 4903 } 4904 4905 ActivityRecord restartPackage(String packageName) { 4906 ActivityRecord starting = topRunningActivityLocked(); 4907 4908 // All activities that came from the package must be 4909 // restarted as if there was a config change. 4910 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4911 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4912 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4913 final ActivityRecord a = activities.get(activityNdx); 4914 if (a.info.packageName.equals(packageName)) { 4915 a.forceNewConfig = true; 4916 if (starting != null && a == starting && a.visible) { 4917 a.startFreezingScreenLocked(starting.app, 4918 CONFIG_SCREEN_LAYOUT); 4919 } 4920 } 4921 } 4922 } 4923 4924 return starting; 4925 } 4926 4927 void removeTask(TaskRecord task, String reason) { 4928 removeTask(task, reason, REMOVE_TASK_MODE_DESTROYING); 4929 } 4930 4931 /** 4932 * Removes the input task from this stack. 4933 * @param task to remove. 4934 * @param reason for removal. 4935 * @param mode task removal mode. Either {@link #REMOVE_TASK_MODE_DESTROYING}, 4936 * {@link #REMOVE_TASK_MODE_MOVING}, {@link #REMOVE_TASK_MODE_MOVING_TO_TOP}. 4937 */ 4938 void removeTask(TaskRecord task, String reason, int mode) { 4939 if (mode == REMOVE_TASK_MODE_DESTROYING) { 4940 mStackSupervisor.removeLockedTaskLocked(task); 4941 mWindowManager.removeTask(task.taskId); 4942 if (!StackId.persistTaskBounds(mStackId)) { 4943 // Reset current bounds for task whose bounds shouldn't be persisted so it uses 4944 // default configuration the next time it launches. 4945 task.updateOverrideConfiguration(null); 4946 } 4947 } 4948 4949 final ActivityRecord r = mResumedActivity; 4950 if (r != null && r.task == task) { 4951 mResumedActivity = null; 4952 } 4953 4954 final int taskNdx = mTaskHistory.indexOf(task); 4955 final int topTaskNdx = mTaskHistory.size() - 1; 4956 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 4957 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 4958 if (!nextTask.isOverHomeStack()) { 4959 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4960 } 4961 } 4962 mTaskHistory.remove(task); 4963 updateTaskMovement(task, true); 4964 4965 if (mode == REMOVE_TASK_MODE_DESTROYING && task.mActivities.isEmpty()) { 4966 // TODO: VI what about activity? 4967 final boolean isVoiceSession = task.voiceSession != null; 4968 if (isVoiceSession) { 4969 try { 4970 task.voiceSession.taskFinished(task.intent, task.taskId); 4971 } catch (RemoteException e) { 4972 } 4973 } 4974 if (task.autoRemoveFromRecents() || isVoiceSession) { 4975 // Task creator asked to remove this when done, or this task was a voice 4976 // interaction, so it should not remain on the recent tasks list. 4977 mRecentTasks.remove(task); 4978 task.removedFromRecents(); 4979 } 4980 } 4981 4982 if (mTaskHistory.isEmpty()) { 4983 if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this); 4984 // We only need to adjust focused stack if this stack is in focus and we are not in the 4985 // process of moving the task to the top of the stack that will be focused. 4986 if (isOnHomeDisplay() && mode != REMOVE_TASK_MODE_MOVING_TO_TOP 4987 && mStackSupervisor.isFocusedStack(this)) { 4988 String myReason = reason + " leftTaskHistoryEmpty"; 4989 if (mFullscreen 4990 || !adjustFocusToNextFocusableStackLocked( 4991 task.getTaskToReturnTo(), myReason)) { 4992 mStackSupervisor.moveHomeStackToFront(myReason); 4993 } 4994 } 4995 if (mStacks != null) { 4996 mStacks.remove(this); 4997 mStacks.add(0, this); 4998 } 4999 if (!isHomeStack()) { 5000 mActivityContainer.onTaskListEmptyLocked(); 5001 } 5002 } 5003 5004 task.stack = null; 5005 } 5006 5007 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 5008 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 5009 boolean toTop) { 5010 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 5011 voiceInteractor); 5012 // add the task to stack first, mTaskPositioner might need the stack association 5013 addTask(task, toTop, "createTaskRecord"); 5014 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 5015 if (!layoutTaskInStack(task, info.windowLayout) && mBounds != null && task.isResizeable() 5016 && !isLockscreenShown) { 5017 task.updateOverrideConfiguration(mBounds); 5018 } 5019 return task; 5020 } 5021 5022 boolean layoutTaskInStack(TaskRecord task, ActivityInfo.WindowLayout windowLayout) { 5023 if (mTaskPositioner == null) { 5024 return false; 5025 } 5026 mTaskPositioner.updateDefaultBounds(task, mTaskHistory, windowLayout); 5027 return true; 5028 } 5029 5030 ArrayList<TaskRecord> getAllTasks() { 5031 return new ArrayList<>(mTaskHistory); 5032 } 5033 5034 void addTask(final TaskRecord task, final boolean toTop, String reason) { 5035 final ActivityStack prevStack = preAddTask(task, reason, toTop); 5036 5037 task.stack = this; 5038 if (toTop) { 5039 insertTaskAtTop(task, null); 5040 } else { 5041 mTaskHistory.add(0, task); 5042 updateTaskMovement(task, false); 5043 } 5044 postAddTask(task, prevStack); 5045 } 5046 5047 void positionTask(final TaskRecord task, int position) { 5048 final ActivityRecord topRunningActivity = task.topRunningActivityLocked(); 5049 final boolean wasResumed = topRunningActivity == task.stack.mResumedActivity; 5050 final ActivityStack prevStack = preAddTask(task, "positionTask", !ON_TOP); 5051 task.stack = this; 5052 insertTaskAtPosition(task, position); 5053 postAddTask(task, prevStack); 5054 if (wasResumed) { 5055 if (mResumedActivity != null) { 5056 Log.wtf(TAG, "mResumedActivity was already set when moving mResumedActivity from" 5057 + " other stack to this stack mResumedActivity=" + mResumedActivity 5058 + " other mResumedActivity=" + topRunningActivity); 5059 } 5060 mResumedActivity = topRunningActivity; 5061 } 5062 } 5063 5064 private ActivityStack preAddTask(TaskRecord task, String reason, boolean toTop) { 5065 final ActivityStack prevStack = task.stack; 5066 if (prevStack != null && prevStack != this) { 5067 prevStack.removeTask(task, reason, 5068 toTop ? REMOVE_TASK_MODE_MOVING_TO_TOP : REMOVE_TASK_MODE_MOVING); 5069 } 5070 return prevStack; 5071 } 5072 5073 private void postAddTask(TaskRecord task, ActivityStack prevStack) { 5074 if (prevStack != null) { 5075 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5076 } else if (task.voiceSession != null) { 5077 try { 5078 task.voiceSession.taskStarted(task.intent, task.taskId); 5079 } catch (RemoteException e) { 5080 } 5081 } 5082 } 5083 5084 void addConfigOverride(ActivityRecord r, TaskRecord task) { 5085 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5086 // TODO: VI deal with activity 5087 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 5088 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 5089 (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, r.info.configChanges, 5090 task.voiceSession != null, r.mLaunchTaskBehind, bounds, task.mOverrideConfig, 5091 task.mResizeMode, r.isAlwaysFocusable(), task.isHomeTask()); 5092 r.taskConfigOverride = task.mOverrideConfig; 5093 } 5094 5095 void moveToFrontAndResumeStateIfNeeded( 5096 ActivityRecord r, boolean moveToFront, boolean setResume, String reason) { 5097 if (!moveToFront) { 5098 return; 5099 } 5100 5101 // If the activity owns the last resumed activity, transfer that together, 5102 // so that we don't resume the same activity again in the new stack. 5103 // Apps may depend on onResume()/onPause() being called in pairs. 5104 if (setResume) { 5105 mResumedActivity = r; 5106 } 5107 // Move the stack in which we are placing the activity to the front. The call will also 5108 // make sure the activity focus is set. 5109 moveToFront(reason); 5110 } 5111 5112 /** 5113 * Moves the input activity from its current stack to this one. 5114 * NOTE: The current task of the activity isn't moved to this stack. Instead a new task is 5115 * created on this stack which the activity is added to. 5116 * */ 5117 void moveActivityToStack(ActivityRecord r) { 5118 final ActivityStack prevStack = r.task.stack; 5119 if (prevStack.mStackId == mStackId) { 5120 // You are already in the right stack silly... 5121 return; 5122 } 5123 5124 final boolean wasFocused = mStackSupervisor.isFocusedStack(prevStack) 5125 && (mStackSupervisor.topRunningActivityLocked() == r); 5126 final boolean wasResumed = wasFocused && (prevStack.mResumedActivity == r); 5127 5128 final TaskRecord task = createTaskRecord( 5129 mStackSupervisor.getNextTaskIdForUserLocked(r.userId), 5130 r.info, r.intent, null, null, true); 5131 r.setTask(task, null); 5132 task.addActivityToTop(r); 5133 setAppTask(r, task); 5134 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5135 moveToFrontAndResumeStateIfNeeded(r, wasFocused, wasResumed, "moveActivityToStack"); 5136 if (wasResumed) { 5137 prevStack.mResumedActivity = null; 5138 } 5139 } 5140 5141 private void setAppTask(ActivityRecord r, TaskRecord task) { 5142 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5143 mWindowManager.setAppTask(r.appToken, task.taskId, mStackId, bounds, task.mOverrideConfig, 5144 task.mResizeMode, task.isHomeTask()); 5145 r.taskConfigOverride = task.mOverrideConfig; 5146 } 5147 5148 public int getStackId() { 5149 return mStackId; 5150 } 5151 5152 @Override 5153 public String toString() { 5154 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 5155 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 5156 } 5157 5158 void onLockTaskPackagesUpdatedLocked() { 5159 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 5160 mTaskHistory.get(taskNdx).setLockTaskAuth(); 5161 } 5162 } 5163} 5164