ActivityStack.java revision d3bbb13fe29e8b6c931497daeb124669e050b419
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.ON_TOP; 77import static com.android.server.am.ActivityStackSupervisor.PRESERVE_WINDOWS; 78import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_CLOSE; 79import static com.android.server.wm.AppTransition.TRANSIT_ACTIVITY_OPEN; 80import static com.android.server.wm.AppTransition.TRANSIT_NONE; 81import static com.android.server.wm.AppTransition.TRANSIT_TASK_CLOSE; 82import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN; 83import static com.android.server.wm.AppTransition.TRANSIT_TASK_OPEN_BEHIND; 84import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_BACK; 85import static com.android.server.wm.AppTransition.TRANSIT_TASK_TO_FRONT; 86 87import android.app.Activity; 88import android.app.ActivityManager; 89import android.app.ActivityManager.RunningTaskInfo; 90import android.app.ActivityManager.StackId; 91import android.app.ActivityOptions; 92import android.app.AppGlobals; 93import android.app.IActivityController; 94import android.app.ResultInfo; 95import android.content.ComponentName; 96import android.content.Intent; 97import android.content.pm.ActivityInfo; 98import android.content.pm.ApplicationInfo; 99import android.content.res.Configuration; 100import android.graphics.Bitmap; 101import android.graphics.Point; 102import android.graphics.Rect; 103import android.net.Uri; 104import android.os.Binder; 105import android.os.Bundle; 106import android.os.Debug; 107import android.os.Handler; 108import android.os.IBinder; 109import android.os.Looper; 110import android.os.Message; 111import android.os.PersistableBundle; 112import android.os.RemoteException; 113import android.os.SystemClock; 114import android.os.Trace; 115import android.os.UserHandle; 116import android.service.voice.IVoiceInteractionSession; 117import android.util.ArraySet; 118import android.util.EventLog; 119import android.util.Log; 120import android.util.Slog; 121import android.view.Display; 122 123import com.android.internal.app.IVoiceInteractor; 124import com.android.internal.content.ReferrerIntent; 125import com.android.internal.os.BatteryStatsImpl; 126import com.android.server.Watchdog; 127import com.android.server.am.ActivityManagerService.ItemMatcher; 128import com.android.server.am.ActivityStackSupervisor.ActivityContainer; 129import com.android.server.wm.TaskGroup; 130import com.android.server.wm.WindowManagerService; 131 132import java.io.FileDescriptor; 133import java.io.PrintWriter; 134import java.lang.ref.WeakReference; 135import java.util.ArrayList; 136import java.util.Iterator; 137import java.util.List; 138import java.util.Objects; 139import java.util.Set; 140 141/** 142 * State and management of a single stack of activities. 143 */ 144final class ActivityStack { 145 146 private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityStack" : TAG_AM; 147 private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE; 148 private static final String TAG_APP = TAG + POSTFIX_APP; 149 private static final String TAG_CLEANUP = TAG + POSTFIX_CLEANUP; 150 private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION; 151 private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS; 152 private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE; 153 private static final String TAG_RELEASE = TAG + POSTFIX_RELEASE; 154 private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS; 155 private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE; 156 private static final String TAG_SCREENSHOTS = TAG + POSTFIX_SCREENSHOTS; 157 private static final String TAG_STACK = TAG + POSTFIX_STACK; 158 private static final String TAG_STATES = TAG + POSTFIX_STATES; 159 private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH; 160 private static final String TAG_TASKS = TAG + POSTFIX_TASKS; 161 private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION; 162 private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING; 163 private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY; 164 165 private static final boolean VALIDATE_TOKENS = false; 166 167 // Ticks during which we check progress while waiting for an app to launch. 168 static final int LAUNCH_TICK = 500; 169 170 // How long we wait until giving up on the last activity to pause. This 171 // is short because it directly impacts the responsiveness of starting the 172 // next activity. 173 static final int PAUSE_TIMEOUT = 500; 174 175 // How long we wait for the activity to tell us it has stopped before 176 // giving up. This is a good amount of time because we really need this 177 // from the application in order to get its saved state. 178 static final int STOP_TIMEOUT = 10 * 1000; 179 180 // How long we wait until giving up on an activity telling us it has 181 // finished destroying itself. 182 static final int DESTROY_TIMEOUT = 10 * 1000; 183 184 // How long until we reset a task when the user returns to it. Currently 185 // disabled. 186 static final long ACTIVITY_INACTIVE_RESET_TIME = 0; 187 188 // How long between activity launches that we consider safe to not warn 189 // the user about an unexpected activity being launched on top. 190 static final long START_WARN_TIME = 5 * 1000; 191 192 // Set to false to disable the preview that is shown while a new activity 193 // is being started. 194 static final boolean SHOW_APP_STARTING_PREVIEW = true; 195 196 // How long to wait for all background Activities to redraw following a call to 197 // convertToTranslucent(). 198 static final long TRANSLUCENT_CONVERSION_TIMEOUT = 2000; 199 200 // How many activities have to be scheduled to stop to force a stop pass. 201 private static final int MAX_STOPPING_TO_FORCE = 3; 202 203 enum ActivityState { 204 INITIALIZING, 205 RESUMED, 206 PAUSING, 207 PAUSED, 208 STOPPING, 209 STOPPED, 210 FINISHING, 211 DESTROYING, 212 DESTROYED 213 } 214 215 // Stack is not considered visible. 216 static final int STACK_INVISIBLE = 0; 217 // Stack is considered visible 218 static final int STACK_VISIBLE = 1; 219 // Stack is considered visible, but only becuase it has activity that is visible behind other 220 // activities and there is a specific combination of stacks. 221 static final int STACK_VISIBLE_ACTIVITY_BEHIND = 2; 222 223 /* The various modes for the method {@link #removeTask}. */ 224 // Task is being completely removed from all stacks in the system. 225 static final int REMOVE_TASK_MODE_DESTROYING = 0; 226 // Task is being removed from this stack so we can add it to another stack. In the case we are 227 // moving we don't want to perform some operations on the task like removing it from window 228 // manager or recents. 229 static final int REMOVE_TASK_MODE_MOVING = 1; 230 // Similar to {@link #REMOVE_TASK_MODE_MOVING} and the task will be added to the top of its new 231 // stack and the new stack will be on top of all stacks. 232 static final int REMOVE_TASK_MODE_MOVING_TO_TOP = 2; 233 234 final ActivityManagerService mService; 235 final WindowManagerService mWindowManager; 236 private final RecentTasks mRecentTasks; 237 238 /** 239 * The back history of all previous (and possibly still 240 * running) activities. It contains #TaskRecord objects. 241 */ 242 private final ArrayList<TaskRecord> mTaskHistory = new ArrayList<>(); 243 244 /** 245 * Used for validating app tokens with window manager. 246 */ 247 final ArrayList<TaskGroup> mValidateAppTokens = new ArrayList<>(); 248 249 /** 250 * List of running activities, sorted by recent usage. 251 * The first entry in the list is the least recently used. 252 * It contains HistoryRecord objects. 253 */ 254 final ArrayList<ActivityRecord> mLRUActivities = new ArrayList<>(); 255 256 /** 257 * Animations that for the current transition have requested not to 258 * be considered for the transition animation. 259 */ 260 final ArrayList<ActivityRecord> mNoAnimActivities = new ArrayList<>(); 261 262 /** 263 * When we are in the process of pausing an activity, before starting the 264 * next one, this variable holds the activity that is currently being paused. 265 */ 266 ActivityRecord mPausingActivity = null; 267 268 /** 269 * This is the last activity that we put into the paused state. This is 270 * used to determine if we need to do an activity transition while sleeping, 271 * when we normally hold the top activity paused. 272 */ 273 ActivityRecord mLastPausedActivity = null; 274 275 /** 276 * Activities that specify No History must be removed once the user navigates away from them. 277 * If the device goes to sleep with such an activity in the paused state then we save it here 278 * and finish it later if another activity replaces it on wakeup. 279 */ 280 ActivityRecord mLastNoHistoryActivity = null; 281 282 /** 283 * Current activity that is resumed, or null if there is none. 284 */ 285 ActivityRecord mResumedActivity = null; 286 287 /** 288 * This is the last activity that has been started. It is only used to 289 * identify when multiple activities are started at once so that the user 290 * can be warned they may not be in the activity they think they are. 291 */ 292 ActivityRecord mLastStartedActivity = null; 293 294 // The topmost Activity passed to convertToTranslucent(). When non-null it means we are 295 // waiting for all Activities in mUndrawnActivitiesBelowTopTranslucent to be removed as they 296 // are drawn. When the last member of mUndrawnActivitiesBelowTopTranslucent is removed the 297 // Activity in mTranslucentActivityWaiting is notified via 298 // Activity.onTranslucentConversionComplete(false). If a timeout occurs prior to the last 299 // background activity being drawn then the same call will be made with a true value. 300 ActivityRecord mTranslucentActivityWaiting = null; 301 private ArrayList<ActivityRecord> mUndrawnActivitiesBelowTopTranslucent = new ArrayList<>(); 302 303 /** 304 * Set when we know we are going to be calling updateConfiguration() 305 * soon, so want to skip intermediate config checks. 306 */ 307 boolean mConfigWillChange; 308 309 // Whether or not this stack covers the entire screen; by default stacks are fullscreen 310 boolean mFullscreen = true; 311 // Current bounds of the stack or null if fullscreen. 312 Rect mBounds = null; 313 314 boolean mUpdateBoundsDeferred; 315 boolean mUpdateBoundsDeferredCalled; 316 final Rect mDeferredBounds = new Rect(); 317 final Rect mDeferredTaskBounds = new Rect(); 318 final Rect mDeferredTaskInsetBounds = new Rect(); 319 320 long mLaunchStartTime = 0; 321 long mFullyDrawnStartTime = 0; 322 323 int mCurrentUser; 324 325 final int mStackId; 326 final ActivityContainer mActivityContainer; 327 /** The other stacks, in order, on the attached display. Updated at attach/detach time. */ 328 ArrayList<ActivityStack> mStacks; 329 /** The attached Display's unique identifier, or -1 if detached */ 330 int mDisplayId; 331 332 /** Run all ActivityStacks through this */ 333 final ActivityStackSupervisor mStackSupervisor; 334 335 private final LaunchingTaskPositioner mTaskPositioner; 336 337 static final int PAUSE_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 1; 338 static final int DESTROY_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 2; 339 static final int LAUNCH_TICK_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 3; 340 static final int STOP_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 4; 341 static final int DESTROY_ACTIVITIES_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 5; 342 static final int TRANSLUCENT_TIMEOUT_MSG = ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 6; 343 static final int RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG = 344 ActivityManagerService.FIRST_ACTIVITY_STACK_MSG + 7; 345 346 static class ScheduleDestroyArgs { 347 final ProcessRecord mOwner; 348 final String mReason; 349 ScheduleDestroyArgs(ProcessRecord owner, String reason) { 350 mOwner = owner; 351 mReason = reason; 352 } 353 } 354 355 final Handler mHandler; 356 357 final class ActivityStackHandler extends Handler { 358 359 ActivityStackHandler(Looper looper) { 360 super(looper); 361 } 362 363 @Override 364 public void handleMessage(Message msg) { 365 switch (msg.what) { 366 case PAUSE_TIMEOUT_MSG: { 367 ActivityRecord r = (ActivityRecord)msg.obj; 368 // We don't at this point know if the activity is fullscreen, 369 // so we need to be conservative and assume it isn't. 370 Slog.w(TAG, "Activity pause timeout for " + r); 371 synchronized (mService) { 372 if (r.app != null) { 373 mService.logAppTooSlow(r.app, r.pauseTime, "pausing " + r); 374 } 375 activityPausedLocked(r.appToken, true); 376 } 377 } break; 378 case LAUNCH_TICK_MSG: { 379 ActivityRecord r = (ActivityRecord)msg.obj; 380 synchronized (mService) { 381 if (r.continueLaunchTickingLocked()) { 382 mService.logAppTooSlow(r.app, r.launchTickTime, "launching " + r); 383 } 384 } 385 } break; 386 case DESTROY_TIMEOUT_MSG: { 387 ActivityRecord r = (ActivityRecord)msg.obj; 388 // We don't at this point know if the activity is fullscreen, 389 // so we need to be conservative and assume it isn't. 390 Slog.w(TAG, "Activity destroy timeout for " + r); 391 synchronized (mService) { 392 activityDestroyedLocked(r != null ? r.appToken : null, "destroyTimeout"); 393 } 394 } break; 395 case STOP_TIMEOUT_MSG: { 396 ActivityRecord r = (ActivityRecord)msg.obj; 397 // We don't at this point know if the activity is fullscreen, 398 // so we need to be conservative and assume it isn't. 399 Slog.w(TAG, "Activity stop timeout for " + r); 400 synchronized (mService) { 401 if (r.isInHistory()) { 402 activityStoppedLocked(r, null, null, null); 403 } 404 } 405 } break; 406 case DESTROY_ACTIVITIES_MSG: { 407 ScheduleDestroyArgs args = (ScheduleDestroyArgs)msg.obj; 408 synchronized (mService) { 409 destroyActivitiesLocked(args.mOwner, args.mReason); 410 } 411 } break; 412 case TRANSLUCENT_TIMEOUT_MSG: { 413 synchronized (mService) { 414 notifyActivityDrawnLocked(null); 415 } 416 } break; 417 case RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG: { 418 synchronized (mService) { 419 final ActivityRecord r = getVisibleBehindActivity(); 420 Slog.e(TAG, "Timeout waiting for cancelVisibleBehind player=" + r); 421 if (r != null) { 422 mService.killAppAtUsersRequest(r.app, null); 423 } 424 } 425 } break; 426 } 427 } 428 } 429 430 int numActivities() { 431 int count = 0; 432 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 433 count += mTaskHistory.get(taskNdx).mActivities.size(); 434 } 435 return count; 436 } 437 438 ActivityStack(ActivityStackSupervisor.ActivityContainer activityContainer, 439 RecentTasks recentTasks) { 440 mActivityContainer = activityContainer; 441 mStackSupervisor = activityContainer.getOuter(); 442 mService = mStackSupervisor.mService; 443 mHandler = new ActivityStackHandler(mService.mHandler.getLooper()); 444 mWindowManager = mService.mWindowManager; 445 mStackId = activityContainer.mStackId; 446 mCurrentUser = mService.mUserController.getCurrentUserIdLocked(); 447 mRecentTasks = recentTasks; 448 mTaskPositioner = mStackId == FREEFORM_WORKSPACE_STACK_ID 449 ? new LaunchingTaskPositioner() : null; 450 } 451 452 void attachDisplay(ActivityStackSupervisor.ActivityDisplay activityDisplay, boolean onTop) { 453 mDisplayId = activityDisplay.mDisplayId; 454 mStacks = activityDisplay.mStacks; 455 mBounds = mWindowManager.attachStack(mStackId, activityDisplay.mDisplayId, onTop); 456 mFullscreen = mBounds == null; 457 if (mTaskPositioner != null) { 458 mTaskPositioner.setDisplay(activityDisplay.mDisplay); 459 mTaskPositioner.configure(mBounds); 460 } 461 462 if (mStackId == DOCKED_STACK_ID) { 463 // If we created a docked stack we want to resize it so it resizes all other stacks 464 // in the system. 465 mStackSupervisor.resizeDockedStackLocked( 466 mBounds, null, null, null, null, PRESERVE_WINDOWS); 467 } 468 } 469 470 void detachDisplay() { 471 mDisplayId = Display.INVALID_DISPLAY; 472 mStacks = null; 473 if (mTaskPositioner != null) { 474 mTaskPositioner.reset(); 475 } 476 mWindowManager.detachStack(mStackId); 477 if (mStackId == DOCKED_STACK_ID) { 478 // If we removed a docked stack we want to resize it so it resizes all other stacks 479 // in the system to fullscreen. 480 mStackSupervisor.resizeDockedStackLocked( 481 null, null, null, null, null, PRESERVE_WINDOWS); 482 } 483 } 484 485 public void getDisplaySize(Point out) { 486 mActivityContainer.mActivityDisplay.mDisplay.getSize(out); 487 } 488 489 /** 490 * Defers updating the bounds of the stack. If the stack was resized/repositioned while 491 * deferring, the bounds will update in {@link #continueUpdateBounds()}. 492 */ 493 void deferUpdateBounds() { 494 if (!mUpdateBoundsDeferred) { 495 mUpdateBoundsDeferred = true; 496 mUpdateBoundsDeferredCalled = false; 497 } 498 } 499 500 /** 501 * Continues updating bounds after updates have been deferred. If there was a resize attempt 502 * between {@link #deferUpdateBounds()} and {@link #continueUpdateBounds()}, the stack will 503 * be resized to that bounds. 504 */ 505 void continueUpdateBounds() { 506 final boolean wasDeferred = mUpdateBoundsDeferred; 507 mUpdateBoundsDeferred = false; 508 if (wasDeferred && mUpdateBoundsDeferredCalled) { 509 mStackSupervisor.resizeStackUncheckedLocked(this, 510 mDeferredBounds.isEmpty() ? null : mDeferredBounds, 511 mDeferredTaskBounds.isEmpty() ? null : mDeferredTaskBounds, 512 mDeferredTaskInsetBounds.isEmpty() ? null : mDeferredTaskInsetBounds); 513 } 514 } 515 516 boolean updateBoundsAllowed(Rect bounds, Rect tempTaskBounds, 517 Rect tempTaskInsetBounds) { 518 if (!mUpdateBoundsDeferred) { 519 return true; 520 } 521 if (bounds != null) { 522 mDeferredBounds.set(bounds); 523 } else { 524 mDeferredBounds.setEmpty(); 525 } 526 if (tempTaskBounds != null) { 527 mDeferredTaskBounds.set(tempTaskBounds); 528 } else { 529 mDeferredTaskBounds.setEmpty(); 530 } 531 if (tempTaskInsetBounds != null) { 532 mDeferredTaskInsetBounds.set(tempTaskInsetBounds); 533 } else { 534 mDeferredTaskInsetBounds.setEmpty(); 535 } 536 mUpdateBoundsDeferredCalled = true; 537 return false; 538 } 539 540 void setBounds(Rect bounds) { 541 mBounds = mFullscreen ? null : new Rect(bounds); 542 if (mTaskPositioner != null) { 543 mTaskPositioner.configure(bounds); 544 } 545 } 546 547 boolean okToShowLocked(ActivityRecord r) { 548 return mStackSupervisor.okToShowLocked(r); 549 } 550 551 final ActivityRecord topRunningActivityLocked() { 552 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 553 ActivityRecord r = mTaskHistory.get(taskNdx).topRunningActivityLocked(); 554 if (r != null) { 555 return r; 556 } 557 } 558 return null; 559 } 560 561 final ActivityRecord topRunningNonDelayedActivityLocked(ActivityRecord notTop) { 562 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 563 final TaskRecord task = mTaskHistory.get(taskNdx); 564 final ArrayList<ActivityRecord> activities = task.mActivities; 565 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 566 ActivityRecord r = activities.get(activityNdx); 567 if (!r.finishing && !r.delayedResume && r != notTop && okToShowLocked(r)) { 568 return r; 569 } 570 } 571 } 572 return null; 573 } 574 575 /** 576 * This is a simplified version of topRunningActivityLocked that provides a number of 577 * optional skip-over modes. It is intended for use with the ActivityController hook only. 578 * 579 * @param token If non-null, any history records matching this token will be skipped. 580 * @param taskId If non-zero, we'll attempt to skip over records with the same task ID. 581 * 582 * @return Returns the HistoryRecord of the next activity on the stack. 583 */ 584 final ActivityRecord topRunningActivityLocked(IBinder token, int taskId) { 585 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 586 TaskRecord task = mTaskHistory.get(taskNdx); 587 if (task.taskId == taskId) { 588 continue; 589 } 590 ArrayList<ActivityRecord> activities = task.mActivities; 591 for (int i = activities.size() - 1; i >= 0; --i) { 592 final ActivityRecord r = activities.get(i); 593 // Note: the taskId check depends on real taskId fields being non-zero 594 if (!r.finishing && (token != r.appToken) && okToShowLocked(r)) { 595 return r; 596 } 597 } 598 } 599 return null; 600 } 601 602 final ActivityRecord topActivity() { 603 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 604 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 605 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 606 final ActivityRecord r = activities.get(activityNdx); 607 if (!r.finishing) { 608 return r; 609 } 610 } 611 } 612 return null; 613 } 614 615 final TaskRecord topTask() { 616 final int size = mTaskHistory.size(); 617 if (size > 0) { 618 return mTaskHistory.get(size - 1); 619 } 620 return null; 621 } 622 623 TaskRecord taskForIdLocked(int id) { 624 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 625 final TaskRecord task = mTaskHistory.get(taskNdx); 626 if (task.taskId == id) { 627 return task; 628 } 629 } 630 return null; 631 } 632 633 ActivityRecord isInStackLocked(IBinder token) { 634 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 635 return isInStackLocked(r); 636 } 637 638 ActivityRecord isInStackLocked(ActivityRecord r) { 639 if (r == null) { 640 return null; 641 } 642 final TaskRecord task = r.task; 643 if (task != null && task.stack != null 644 && task.mActivities.contains(r) && mTaskHistory.contains(task)) { 645 if (task.stack != this) Slog.w(TAG, 646 "Illegal state! task does not point to stack it is in."); 647 return r; 648 } 649 return null; 650 } 651 652 final boolean updateLRUListLocked(ActivityRecord r) { 653 final boolean hadit = mLRUActivities.remove(r); 654 mLRUActivities.add(r); 655 return hadit; 656 } 657 658 final boolean isHomeStack() { 659 return mStackId == HOME_STACK_ID; 660 } 661 662 final boolean isDockedStack() { 663 return mStackId == DOCKED_STACK_ID; 664 } 665 666 final boolean isPinnedStack() { 667 return mStackId == PINNED_STACK_ID; 668 } 669 670 final boolean isOnHomeDisplay() { 671 return isAttached() && 672 mActivityContainer.mActivityDisplay.mDisplayId == Display.DEFAULT_DISPLAY; 673 } 674 675 void moveToFront(String reason) { 676 moveToFront(reason, null); 677 } 678 679 /** 680 * @param reason The reason for moving the stack to the front. 681 * @param task If non-null, the task will be moved to the top of the stack. 682 * */ 683 void moveToFront(String reason, TaskRecord task) { 684 if (!isAttached()) { 685 return; 686 } 687 688 mStacks.remove(this); 689 int addIndex = mStacks.size(); 690 691 if (addIndex > 0) { 692 final ActivityStack topStack = mStacks.get(addIndex - 1); 693 if (StackId.isAlwaysOnTop(topStack.mStackId) && topStack != this) { 694 // If the top stack is always on top, we move this stack just below it. 695 addIndex--; 696 } 697 } 698 699 mStacks.add(addIndex, this); 700 701 // TODO(multi-display): Needs to also work if focus is moving to the non-home display. 702 if (isOnHomeDisplay()) { 703 mStackSupervisor.setFocusStackUnchecked(reason, this); 704 } 705 if (task != null) { 706 insertTaskAtTop(task, null); 707 } else { 708 task = topTask(); 709 } 710 if (task != null) { 711 mWindowManager.moveTaskToTop(task.taskId); 712 } 713 } 714 715 boolean isFocusable() { 716 if (StackId.canReceiveKeys(mStackId)) { 717 return true; 718 } 719 // The stack isn't focusable. See if its top activity is focusable to force focus on the 720 // stack. 721 final ActivityRecord r = topRunningActivityLocked(); 722 return r != null && r.isFocusable(); 723 } 724 725 final boolean isAttached() { 726 return mStacks != null; 727 } 728 729 /** 730 * Returns the top activity in any existing task matching the given Intent in the input result. 731 * Returns null if no such task is found. 732 */ 733 void findTaskLocked(ActivityRecord target, FindTaskResult result) { 734 Intent intent = target.intent; 735 ActivityInfo info = target.info; 736 ComponentName cls = intent.getComponent(); 737 if (info.targetActivity != null) { 738 cls = new ComponentName(info.packageName, info.targetActivity); 739 } 740 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 741 boolean isDocument = intent != null & intent.isDocument(); 742 // If documentData is non-null then it must match the existing task data. 743 Uri documentData = isDocument ? intent.getData() : null; 744 745 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Looking for task of " + target + " in " + this); 746 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 747 final TaskRecord task = mTaskHistory.get(taskNdx); 748 if (task.voiceSession != null) { 749 // We never match voice sessions; those always run independently. 750 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": voice session"); 751 continue; 752 } 753 if (task.userId != userId) { 754 // Looking for a different task. 755 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": different user"); 756 continue; 757 } 758 final ActivityRecord r = task.getTopActivity(); 759 if (r == null || r.finishing || r.userId != userId || 760 r.launchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE) { 761 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch root " + r); 762 continue; 763 } 764 if (r.mActivityType != target.mActivityType) { 765 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Skipping " + task + ": mismatch activity type"); 766 continue; 767 } 768 769 final Intent taskIntent = task.intent; 770 final Intent affinityIntent = task.affinityIntent; 771 final boolean taskIsDocument; 772 final Uri taskDocumentData; 773 if (taskIntent != null && taskIntent.isDocument()) { 774 taskIsDocument = true; 775 taskDocumentData = taskIntent.getData(); 776 } else if (affinityIntent != null && affinityIntent.isDocument()) { 777 taskIsDocument = true; 778 taskDocumentData = affinityIntent.getData(); 779 } else { 780 taskIsDocument = false; 781 taskDocumentData = null; 782 } 783 784 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Comparing existing cls=" 785 + taskIntent.getComponent().flattenToShortString() 786 + "/aff=" + r.task.rootAffinity + " to new cls=" 787 + intent.getComponent().flattenToShortString() + "/aff=" + info.taskAffinity); 788 // TODO Refactor to remove duplications. Check if logic can be simplified. 789 if (taskIntent != null && taskIntent.getComponent() != null && 790 taskIntent.getComponent().compareTo(cls) == 0 && 791 Objects.equals(documentData, taskDocumentData)) { 792 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching class!"); 793 //dump(); 794 if (DEBUG_TASKS) Slog.d(TAG_TASKS, 795 "For Intent " + intent + " bringing to top: " + r.intent); 796 result.r = r; 797 result.matchedByRootAffinity = false; 798 break; 799 } else if (affinityIntent != null && affinityIntent.getComponent() != null && 800 affinityIntent.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 (!isDocument && !taskIsDocument 810 && result.r == null && task.canMatchRootAffinity()) { 811 if (task.rootAffinity.equals(target.taskAffinity)) { 812 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "Found matching affinity candidate!"); 813 // It is possible for multiple tasks to have the same root affinity especially 814 // if they are in separate stacks. We save off this candidate, but keep looking 815 // to see if there is a better candidate. 816 result.r = r; 817 result.matchedByRootAffinity = true; 818 } 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 boolean compareIntentFilters) { 830 ComponentName cls = intent.getComponent(); 831 if (info.targetActivity != null) { 832 cls = new ComponentName(info.packageName, info.targetActivity); 833 } 834 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 835 836 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 837 final TaskRecord task = mTaskHistory.get(taskNdx); 838 final boolean notCurrentUserTask = 839 !mStackSupervisor.isCurrentProfileLocked(task.userId); 840 final ArrayList<ActivityRecord> activities = task.mActivities; 841 842 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 843 ActivityRecord r = activities.get(activityNdx); 844 if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) { 845 continue; 846 } 847 if (!r.finishing && r.userId == userId) { 848 if (compareIntentFilters) { 849 if (r.intent.filterEquals(intent)) { 850 return r; 851 } 852 } else { 853 if (r.intent.getComponent().equals(cls)) { 854 return r; 855 } 856 } 857 } 858 } 859 } 860 861 return null; 862 } 863 864 /* 865 * Move the activities around in the stack to bring a user to the foreground. 866 */ 867 final void switchUserLocked(int userId) { 868 if (mCurrentUser == userId) { 869 return; 870 } 871 mCurrentUser = userId; 872 873 // Move userId's tasks to the top. 874 int index = mTaskHistory.size(); 875 for (int i = 0; i < index; ) { 876 final TaskRecord task = mTaskHistory.get(i); 877 878 // NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is 879 // okay to show the activity when locked. 880 if (mStackSupervisor.isCurrentProfileLocked(task.userId) 881 || task.topRunningActivityLocked() != null) { 882 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() + 883 " moving " + task + " to top"); 884 mTaskHistory.remove(i); 885 mTaskHistory.add(task); 886 --index; 887 // Use same value for i. 888 } else { 889 ++i; 890 } 891 } 892 if (VALIDATE_TOKENS) { 893 validateAppTokensLocked(); 894 } 895 } 896 897 void minimalResumeActivityLocked(ActivityRecord r) { 898 r.state = ActivityState.RESUMED; 899 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + r + " (starting new instance)" 900 + " callers=" + Debug.getCallers(5)); 901 mResumedActivity = r; 902 r.task.touchActiveTime(); 903 mRecentTasks.addLocked(r.task); 904 completeResumeLocked(r); 905 mStackSupervisor.checkReadyForSleepLocked(); 906 setLaunchTime(r); 907 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 908 "Launch completed; removing icicle of " + r.icicle); 909 } 910 911 void addRecentActivityLocked(ActivityRecord r) { 912 if (r != null) { 913 mRecentTasks.addLocked(r.task); 914 r.task.touchActiveTime(); 915 } 916 } 917 918 private void startLaunchTraces(String packageName) { 919 if (mFullyDrawnStartTime != 0) { 920 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 921 } 922 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0); 923 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 924 } 925 926 private void stopFullyDrawnTraceIfNeeded() { 927 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 928 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 929 mFullyDrawnStartTime = 0; 930 } 931 } 932 933 void setLaunchTime(ActivityRecord r) { 934 if (r.displayStartTime == 0) { 935 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 936 if (r.task != null) { 937 r.task.isLaunching = true; 938 } 939 if (mLaunchStartTime == 0) { 940 startLaunchTraces(r.packageName); 941 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 942 } 943 } else if (mLaunchStartTime == 0) { 944 startLaunchTraces(r.packageName); 945 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 946 } 947 } 948 949 void clearLaunchTime(ActivityRecord r) { 950 // Make sure that there is no activity waiting for this to launch. 951 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 952 r.displayStartTime = r.fullyDrawnStartTime = 0; 953 if (r.task != null) { 954 r.task.isLaunching = false; 955 } 956 } else { 957 mStackSupervisor.removeTimeoutsForActivityLocked(r); 958 mStackSupervisor.scheduleIdleTimeoutLocked(r); 959 } 960 } 961 962 void awakeFromSleepingLocked() { 963 // Ensure activities are no longer sleeping. 964 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 965 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 966 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 967 activities.get(activityNdx).setSleeping(false); 968 } 969 } 970 if (mPausingActivity != null) { 971 Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); 972 activityPausedLocked(mPausingActivity.appToken, true); 973 } 974 } 975 976 void updateActivityApplicationInfoLocked(ApplicationInfo aInfo) { 977 final String packageName = aInfo.packageName; 978 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 979 final List<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 980 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 981 if (packageName.equals(activities.get(activityNdx).packageName)) { 982 activities.get(activityNdx).info.applicationInfo = aInfo; 983 } 984 } 985 } 986 } 987 988 /** 989 * @return true if something must be done before going to sleep. 990 */ 991 boolean checkReadyForSleepLocked() { 992 if (mResumedActivity != null) { 993 // Still have something resumed; can't sleep until it is paused. 994 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity); 995 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 996 "Sleep => pause with userLeaving=false"); 997 startPausingLocked(false, true, false, false); 998 return true; 999 } 1000 if (mPausingActivity != null) { 1001 // Still waiting for something to pause; can't sleep yet. 1002 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity); 1003 return true; 1004 } 1005 1006 if (hasVisibleBehindActivity()) { 1007 // Stop visible behind activity before going to sleep. 1008 final ActivityRecord r = getVisibleBehindActivity(); 1009 mStackSupervisor.mStoppingActivities.add(r); 1010 if (DEBUG_STATES) Slog.v(TAG_STATES, "Sleep still waiting to stop visible behind " + r); 1011 return true; 1012 } 1013 1014 return false; 1015 } 1016 1017 void goToSleep() { 1018 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1019 1020 // Make sure any paused or stopped but visible activities are now sleeping. 1021 // This ensures that the activity's onStop() is called. 1022 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1023 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1024 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1025 final ActivityRecord r = activities.get(activityNdx); 1026 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED 1027 || r.state == ActivityState.PAUSED || r.state == ActivityState.PAUSING) { 1028 r.setSleeping(true); 1029 } 1030 } 1031 } 1032 } 1033 1034 public final Bitmap screenshotActivitiesLocked(ActivityRecord who) { 1035 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivitiesLocked: " + who); 1036 if (who.noDisplay) { 1037 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display"); 1038 return null; 1039 } 1040 1041 if (isHomeStack()) { 1042 // This is an optimization -- since we never show Home or Recents within Recents itself, 1043 // we can just go ahead and skip taking the screenshot if this is the home stack. 1044 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack"); 1045 return null; 1046 } 1047 1048 int w = mService.mThumbnailWidth; 1049 int h = mService.mThumbnailHeight; 1050 float scale = 1f; 1051 if (w > 0) { 1052 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot"); 1053 1054 // When this flag is set, we currently take the fullscreen screenshot of the activity 1055 // but scaled to half the size. This gives us a "good-enough" fullscreen thumbnail to 1056 // use within SystemUI while keeping memory usage low. 1057 if (ActivityManagerService.TAKE_FULLSCREEN_SCREENSHOTS) { 1058 w = h = -1; 1059 scale = mService.mFullscreenThumbnailScale; 1060 } 1061 return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, 1062 w, h, scale); 1063 } 1064 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 1065 return null; 1066 } 1067 1068 /** 1069 * Start pausing the currently resumed activity. It is an error to call this if there 1070 * is already an activity being paused or there is no resumed activity. 1071 * 1072 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 1073 * @param uiSleeping True if this is happening with the user interface going to sleep (the 1074 * screen turning off). 1075 * @param resuming True if this is being called as part of resuming the top activity, so 1076 * we shouldn't try to instigate a resume here. 1077 * @param dontWait True if the caller does not want to wait for the pause to complete. If 1078 * set to true, we will immediately complete the pause here before returning. 1079 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 1080 * it to tell us when it is done. 1081 */ 1082 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 1083 boolean dontWait) { 1084 if (mPausingActivity != null) { 1085 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity 1086 + " state=" + mPausingActivity.state); 1087 if (!mService.isSleepingLocked()) { 1088 // Avoid recursion among check for sleep and complete pause during sleeping. 1089 // Because activity will be paused immediately after resume, just let pause 1090 // be completed by the order of activity paused from clients. 1091 completePauseLocked(false); 1092 } 1093 } 1094 ActivityRecord prev = mResumedActivity; 1095 if (prev == null) { 1096 if (!resuming) { 1097 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 1098 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1099 } 1100 return false; 1101 } 1102 1103 if (mActivityContainer.mParentActivity == null) { 1104 // Top level stack, not a child. Look for child stacks. 1105 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 1106 } 1107 1108 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev); 1109 else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev); 1110 mResumedActivity = null; 1111 mPausingActivity = prev; 1112 mLastPausedActivity = prev; 1113 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 1114 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 1115 prev.state = ActivityState.PAUSING; 1116 prev.task.touchActiveTime(); 1117 clearLaunchTime(prev); 1118 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 1119 if (mService.mHasRecents 1120 && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 1121 prev.mUpdateTaskThumbnailWhenHidden = true; 1122 } 1123 stopFullyDrawnTraceIfNeeded(); 1124 1125 mService.updateCpuStats(); 1126 1127 if (prev.app != null && prev.app.thread != null) { 1128 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev); 1129 try { 1130 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 1131 prev.userId, System.identityHashCode(prev), 1132 prev.shortComponentName); 1133 mService.updateUsageStats(prev, false); 1134 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 1135 userLeaving, prev.configChangeFlags, dontWait); 1136 } catch (Exception e) { 1137 // Ignore exception, if process died other code will cleanup. 1138 Slog.w(TAG, "Exception thrown during pause", e); 1139 mPausingActivity = null; 1140 mLastPausedActivity = null; 1141 mLastNoHistoryActivity = null; 1142 } 1143 } else { 1144 mPausingActivity = null; 1145 mLastPausedActivity = null; 1146 mLastNoHistoryActivity = null; 1147 } 1148 1149 // If we are not going to sleep, we want to ensure the device is 1150 // awake until the next activity is started. 1151 if (!uiSleeping && !mService.isSleepingOrShuttingDownLocked()) { 1152 mStackSupervisor.acquireLaunchWakelock(); 1153 } 1154 1155 if (mPausingActivity != null) { 1156 // Have the window manager pause its key dispatching until the new 1157 // activity has started. If we're pausing the activity just because 1158 // the screen is being turned off and the UI is sleeping, don't interrupt 1159 // key dispatch; the same activity will pick it up again on wakeup. 1160 if (!uiSleeping) { 1161 prev.pauseKeyDispatchingLocked(); 1162 } else if (DEBUG_PAUSE) { 1163 Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off"); 1164 } 1165 1166 if (dontWait) { 1167 // If the caller said they don't want to wait for the pause, then complete 1168 // the pause now. 1169 completePauseLocked(false); 1170 return false; 1171 1172 } else { 1173 // Schedule a pause timeout in case the app doesn't respond. 1174 // We don't give it much time because this directly impacts the 1175 // responsiveness seen by the user. 1176 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 1177 msg.obj = prev; 1178 prev.pauseTime = SystemClock.uptimeMillis(); 1179 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 1180 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete..."); 1181 return true; 1182 } 1183 1184 } else { 1185 // This activity failed to schedule the 1186 // pause, so just treat it as being paused now. 1187 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next."); 1188 if (!resuming) { 1189 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1190 } 1191 return false; 1192 } 1193 } 1194 1195 final void activityPausedLocked(IBinder token, boolean timeout) { 1196 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1197 "Activity paused: token=" + token + ", timeout=" + timeout); 1198 1199 final ActivityRecord r = isInStackLocked(token); 1200 if (r != null) { 1201 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 1202 if (mPausingActivity == r) { 1203 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r 1204 + (timeout ? " (due to timeout)" : " (pause complete)")); 1205 completePauseLocked(true); 1206 return; 1207 } else { 1208 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 1209 r.userId, System.identityHashCode(r), r.shortComponentName, 1210 mPausingActivity != null 1211 ? mPausingActivity.shortComponentName : "(none)"); 1212 if (r.state == ActivityState.PAUSING) { 1213 r.state = ActivityState.PAUSED; 1214 if (r.finishing) { 1215 if (DEBUG_PAUSE) Slog.v(TAG, 1216 "Executing finish of failed to pause activity: " + r); 1217 finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false); 1218 } 1219 } 1220 } 1221 } 1222 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1223 } 1224 1225 final void activityResumedLocked(IBinder token) { 1226 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 1227 if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r); 1228 r.icicle = null; 1229 r.haveState = false; 1230 } 1231 1232 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 1233 PersistableBundle persistentState, CharSequence description) { 1234 if (r.state != ActivityState.STOPPING) { 1235 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 1236 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1237 return; 1238 } 1239 if (persistentState != null) { 1240 r.persistentState = persistentState; 1241 mService.notifyTaskPersisterLocked(r.task, false); 1242 } 1243 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle); 1244 if (icicle != null) { 1245 // If icicle is null, this is happening due to a timeout, so we 1246 // haven't really saved the state. 1247 r.icicle = icicle; 1248 r.haveState = true; 1249 r.launchCount = 0; 1250 r.updateThumbnailLocked(null, description); 1251 } 1252 if (!r.stopped) { 1253 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)"); 1254 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1255 r.stopped = true; 1256 r.state = ActivityState.STOPPED; 1257 1258 mWindowManager.notifyAppStopped(r.appToken, true); 1259 1260 if (getVisibleBehindActivity() == r) { 1261 mStackSupervisor.requestVisibleBehindLocked(r, false); 1262 } 1263 if (r.finishing) { 1264 r.clearOptionsLocked(); 1265 } else { 1266 if (r.deferRelaunchUntilPaused) { 1267 destroyActivityLocked(r, true, "stop-config"); 1268 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1269 } else { 1270 mStackSupervisor.updatePreviousProcessLocked(r); 1271 } 1272 } 1273 } 1274 } 1275 1276 private void completePauseLocked(boolean resumeNext) { 1277 ActivityRecord prev = mPausingActivity; 1278 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev); 1279 1280 if (prev != null) { 1281 final boolean wasStopping = prev.state == ActivityState.STOPPING; 1282 prev.state = ActivityState.PAUSED; 1283 if (prev.finishing) { 1284 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev); 1285 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 1286 } else if (prev.app != null) { 1287 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueue pending stop if needed: " + prev 1288 + " wasStopping=" + wasStopping + " visible=" + prev.visible); 1289 if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { 1290 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1291 "Complete pause, no longer waiting: " + prev); 1292 } 1293 if (prev.deferRelaunchUntilPaused) { 1294 // Complete the deferred relaunch that was waiting for pause to complete. 1295 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Re-launching after pause: " + prev); 1296 relaunchActivityLocked(prev, prev.configChangeFlags, false, 1297 prev.preserveWindowOnDeferredRelaunch); 1298 } else if (wasStopping) { 1299 // We are also stopping, the stop request must have gone soon after the pause. 1300 // We can't clobber it, because the stop confirmation will not be handled. 1301 // We don't need to schedule another stop, we only need to let it happen. 1302 prev.state = ActivityState.STOPPING; 1303 } else if ((!prev.visible && !hasVisibleBehindActivity()) 1304 || mService.isSleepingOrShuttingDownLocked()) { 1305 // If we were visible then resumeTopActivities will release resources before 1306 // stopping. 1307 addToStopping(prev, true /* immediate */); 1308 } 1309 } else { 1310 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev); 1311 prev = null; 1312 } 1313 // It is possible the activity was freezing the screen before it was paused. 1314 // In that case go ahead and remove the freeze this activity has on the screen 1315 // since it is no longer visible. 1316 prev.stopFreezingScreenLocked(true /*force*/); 1317 mPausingActivity = null; 1318 } 1319 1320 if (resumeNext) { 1321 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1322 if (!mService.isSleepingOrShuttingDownLocked()) { 1323 mStackSupervisor.resumeFocusedStackTopActivityLocked(topStack, prev, null); 1324 } else { 1325 mStackSupervisor.checkReadyForSleepLocked(); 1326 ActivityRecord top = topStack.topRunningActivityLocked(); 1327 if (top == null || (prev != null && top != prev)) { 1328 // If there are no more activities available to run, do resume anyway to start 1329 // something. Also if the top activity on the stack is not the just paused 1330 // activity, we need to go ahead and resume it to ensure we complete an 1331 // in-flight app switch. 1332 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1333 } 1334 } 1335 } 1336 1337 if (prev != null) { 1338 prev.resumeKeyDispatchingLocked(); 1339 1340 if (prev.app != null && prev.cpuTimeAtResume > 0 1341 && mService.mBatteryStatsService.isOnBattery()) { 1342 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1343 - prev.cpuTimeAtResume; 1344 if (diff > 0) { 1345 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1346 synchronized (bsi) { 1347 BatteryStatsImpl.Uid.Proc ps = 1348 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1349 prev.info.packageName); 1350 if (ps != null) { 1351 ps.addForegroundTimeLocked(diff); 1352 } 1353 } 1354 } 1355 } 1356 prev.cpuTimeAtResume = 0; // reset it 1357 } 1358 1359 // Notify when the task stack has changed, but only if visibilities changed (not just focus) 1360 if (mStackSupervisor.mAppVisibilitiesChangedSinceLastPause) { 1361 mService.notifyTaskStackChangedLocked(); 1362 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = false; 1363 } 1364 1365 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1366 } 1367 1368 private void addToStopping(ActivityRecord r, boolean immediate) { 1369 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1370 mStackSupervisor.mStoppingActivities.add(r); 1371 } 1372 1373 // If we already have a few activities waiting to stop, then give up 1374 // on things going idle and start clearing them out. Or if r is the 1375 // last of activity of the last task the stack will be empty and must 1376 // be cleared immediately. 1377 boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE 1378 || (r.frontOfTask && mTaskHistory.size() <= 1); 1379 1380 if (immediate || forceIdle) { 1381 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle=" 1382 + forceIdle + "immediate=" + immediate); 1383 mStackSupervisor.scheduleIdleLocked(); 1384 } else { 1385 mStackSupervisor.checkReadyForSleepLocked(); 1386 } 1387 } 1388 1389 /** 1390 * Once we know that we have asked an application to put an activity in 1391 * the resumed state (either by launching it or explicitly telling it), 1392 * this function updates the rest of our state to match that fact. 1393 */ 1394 private void completeResumeLocked(ActivityRecord next) { 1395 next.visible = true; 1396 next.idle = false; 1397 next.results = null; 1398 next.newIntents = null; 1399 next.stopped = false; 1400 1401 if (next.isHomeActivity()) { 1402 ProcessRecord app = next.task.mActivities.get(0).app; 1403 if (app != null && app != mService.mHomeProcess) { 1404 mService.mHomeProcess = app; 1405 } 1406 } 1407 1408 if (next.nowVisible) { 1409 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1410 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1411 } 1412 1413 // schedule an idle timeout in case the app doesn't do it for us. 1414 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1415 1416 mStackSupervisor.reportResumedActivityLocked(next); 1417 1418 next.resumeKeyDispatchingLocked(); 1419 mNoAnimActivities.clear(); 1420 1421 // Mark the point when the activity is resuming 1422 // TODO: To be more accurate, the mark should be before the onCreate, 1423 // not after the onResume. But for subsequent starts, onResume is fine. 1424 if (next.app != null) { 1425 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1426 } else { 1427 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1428 } 1429 1430 next.returningOptions = null; 1431 1432 if (getVisibleBehindActivity() == next) { 1433 // When resuming an activity, require it to call requestVisibleBehind() again. 1434 setVisibleBehindActivity(null); 1435 } 1436 } 1437 1438 private void setVisible(ActivityRecord r, boolean visible) { 1439 r.visible = visible; 1440 if (!visible && r.mUpdateTaskThumbnailWhenHidden) { 1441 r.updateThumbnailLocked(r.task.stack.screenshotActivitiesLocked(r), null); 1442 r.mUpdateTaskThumbnailWhenHidden = false; 1443 } 1444 mWindowManager.setAppVisibility(r.appToken, visible); 1445 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1446 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1447 ActivityContainer container = containers.get(containerNdx); 1448 container.setVisible(visible); 1449 } 1450 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true; 1451 } 1452 1453 // Find the first visible activity above the passed activity and if it is translucent return it 1454 // otherwise return null; 1455 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1456 TaskRecord task = r.task; 1457 if (task == null) { 1458 return null; 1459 } 1460 1461 ActivityStack stack = task.stack; 1462 if (stack == null) { 1463 return null; 1464 } 1465 1466 int stackNdx = mStacks.indexOf(stack); 1467 1468 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1469 int taskNdx = tasks.indexOf(task); 1470 1471 ArrayList<ActivityRecord> activities = task.mActivities; 1472 int activityNdx = activities.indexOf(r) + 1; 1473 1474 final int numStacks = mStacks.size(); 1475 while (stackNdx < numStacks) { 1476 final ActivityStack historyStack = mStacks.get(stackNdx); 1477 tasks = historyStack.mTaskHistory; 1478 final int numTasks = tasks.size(); 1479 while (taskNdx < numTasks) { 1480 final TaskRecord currentTask = tasks.get(taskNdx); 1481 activities = currentTask.mActivities; 1482 final int numActivities = activities.size(); 1483 while (activityNdx < numActivities) { 1484 final ActivityRecord activity = activities.get(activityNdx); 1485 if (!activity.finishing) { 1486 return historyStack.mFullscreen 1487 && currentTask.mFullscreen && activity.fullscreen ? null : activity; 1488 } 1489 ++activityNdx; 1490 } 1491 activityNdx = 0; 1492 ++taskNdx; 1493 } 1494 taskNdx = 0; 1495 ++stackNdx; 1496 } 1497 1498 return null; 1499 } 1500 1501 ActivityStack getNextFocusableStackLocked() { 1502 ArrayList<ActivityStack> stacks = mStacks; 1503 final ActivityRecord parent = mActivityContainer.mParentActivity; 1504 if (parent != null) { 1505 stacks = parent.task.stack.mStacks; 1506 } 1507 if (stacks != null) { 1508 for (int i = stacks.size() - 1; i >= 0; --i) { 1509 ActivityStack stack = stacks.get(i); 1510 if (stack != this && stack.isFocusable() 1511 && stack.getStackVisibilityLocked(null) != STACK_INVISIBLE) { 1512 return stack; 1513 } 1514 } 1515 } 1516 return null; 1517 } 1518 1519 /** Returns true if the stack contains a fullscreen task. */ 1520 private boolean hasFullscreenTask() { 1521 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 1522 final TaskRecord task = mTaskHistory.get(i); 1523 if (task.mFullscreen) { 1524 return true; 1525 } 1526 } 1527 return false; 1528 } 1529 1530 /** 1531 * Returns true if the stack is translucent and can have other contents visible behind it if 1532 * needed. A stack is considered translucent if it don't contain a visible or 1533 * starting (about to be visible) activity that is fullscreen (opaque). 1534 * @param starting The currently starting activity or null if there is none. 1535 * @param stackBehindId The id of the stack directly behind this one. 1536 */ 1537 private boolean isStackTranslucent(ActivityRecord starting, int stackBehindId) { 1538 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1539 final TaskRecord task = mTaskHistory.get(taskNdx); 1540 final ArrayList<ActivityRecord> activities = task.mActivities; 1541 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1542 final ActivityRecord r = activities.get(activityNdx); 1543 1544 if (r.finishing) { 1545 // We don't factor in finishing activities when determining translucency since 1546 // they will be gone soon. 1547 continue; 1548 } 1549 1550 if (!r.visible && r != starting) { 1551 // Also ignore invisible activities that are not the currently starting 1552 // activity (about to be visible). 1553 continue; 1554 } 1555 1556 if (r.fullscreen) { 1557 // Stack isn't translucent if it has at least one fullscreen activity 1558 // that is visible. 1559 return false; 1560 } 1561 1562 if (!isHomeStack() && r.frontOfTask 1563 && task.isOverHomeStack() && stackBehindId != HOME_STACK_ID) { 1564 // Stack isn't translucent if it's top activity should have the home stack 1565 // behind it and the stack currently behind it isn't the home stack. 1566 return false; 1567 } 1568 } 1569 } 1570 return true; 1571 } 1572 1573 /** 1574 * Returns stack's visibility: {@link #STACK_INVISIBLE}, {@link #STACK_VISIBLE} or 1575 * {@link #STACK_VISIBLE_ACTIVITY_BEHIND}. 1576 * @param starting The currently starting activity or null if there is none. 1577 */ 1578 int getStackVisibilityLocked(ActivityRecord starting) { 1579 if (!isAttached()) { 1580 return STACK_INVISIBLE; 1581 } 1582 1583 if (mStackSupervisor.isFrontStack(this) || mStackSupervisor.isFocusedStack(this)) { 1584 return STACK_VISIBLE; 1585 } 1586 1587 final int stackIndex = mStacks.indexOf(this); 1588 1589 if (stackIndex == mStacks.size() - 1) { 1590 Slog.wtf(TAG, 1591 "Stack=" + this + " isn't front stack but is at the top of the stack list"); 1592 return STACK_INVISIBLE; 1593 } 1594 1595 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 1596 if (isLockscreenShown && !StackId.isAllowedOverLockscreen(mStackId)) { 1597 return STACK_INVISIBLE; 1598 } 1599 1600 final ActivityStack focusedStack = mStackSupervisor.getFocusedStack(); 1601 final int focusedStackId = focusedStack.mStackId; 1602 1603 if (mStackId == FULLSCREEN_WORKSPACE_STACK_ID 1604 && hasVisibleBehindActivity() && focusedStackId == HOME_STACK_ID 1605 && !focusedStack.topActivity().fullscreen) { 1606 // The fullscreen stack should be visible if it has a visible behind activity behind 1607 // the home stack that is translucent. 1608 return STACK_VISIBLE_ACTIVITY_BEHIND; 1609 } 1610 1611 if (mStackId == DOCKED_STACK_ID) { 1612 // Docked stack is always visible, except in the case where the top running activity 1613 // task in the focus stack doesn't support any form of resizing but we show it for the 1614 // home task even though it's not resizable. 1615 final ActivityRecord r = focusedStack.topRunningActivityLocked(); 1616 final TaskRecord task = r != null ? r.task : null; 1617 return task == null || task.canGoInDockedStack() || task.isHomeTask() ? STACK_VISIBLE 1618 : STACK_INVISIBLE; 1619 } 1620 1621 // Find the first stack behind focused stack that actually got something visible. 1622 int stackBehindFocusedIndex = mStacks.indexOf(focusedStack) - 1; 1623 while (stackBehindFocusedIndex >= 0 && 1624 mStacks.get(stackBehindFocusedIndex).topRunningActivityLocked() == null) { 1625 stackBehindFocusedIndex--; 1626 } 1627 if ((focusedStackId == DOCKED_STACK_ID || focusedStackId == PINNED_STACK_ID) 1628 && stackIndex == stackBehindFocusedIndex) { 1629 // Stacks directly behind the docked or pinned stack are always visible. 1630 return STACK_VISIBLE; 1631 } 1632 1633 final int stackBehindFocusedId = (stackBehindFocusedIndex >= 0) 1634 ? mStacks.get(stackBehindFocusedIndex).mStackId : INVALID_STACK_ID; 1635 1636 if (focusedStackId == FULLSCREEN_WORKSPACE_STACK_ID 1637 && focusedStack.isStackTranslucent(starting, stackBehindFocusedId)) { 1638 // Stacks behind the fullscreen stack with a translucent activity are always 1639 // visible so they can act as a backdrop to the translucent activity. 1640 // For example, dialog activities 1641 if (stackIndex == stackBehindFocusedIndex) { 1642 return STACK_VISIBLE; 1643 } 1644 if (stackBehindFocusedIndex >= 0) { 1645 if ((stackBehindFocusedId == DOCKED_STACK_ID 1646 || stackBehindFocusedId == PINNED_STACK_ID) 1647 && stackIndex == (stackBehindFocusedIndex - 1)) { 1648 // The stack behind the docked or pinned stack is also visible so we can have a 1649 // complete backdrop to the translucent activity when the docked stack is up. 1650 return STACK_VISIBLE; 1651 } 1652 } 1653 } 1654 1655 if (StackId.isStaticStack(mStackId)) { 1656 // Visibility of any static stack should have been determined by the conditions above. 1657 return STACK_INVISIBLE; 1658 } 1659 1660 for (int i = stackIndex + 1; i < mStacks.size(); i++) { 1661 final ActivityStack stack = mStacks.get(i); 1662 1663 if (!stack.mFullscreen && !stack.hasFullscreenTask()) { 1664 continue; 1665 } 1666 1667 if (!StackId.isDynamicStacksVisibleBehindAllowed(stack.mStackId)) { 1668 // These stacks can't have any dynamic stacks visible behind them. 1669 return STACK_INVISIBLE; 1670 } 1671 1672 if (!stack.isStackTranslucent(starting, INVALID_STACK_ID)) { 1673 return STACK_INVISIBLE; 1674 } 1675 } 1676 1677 return STACK_VISIBLE; 1678 } 1679 1680 final int rankTaskLayers(int baseLayer) { 1681 int layer = 0; 1682 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1683 final TaskRecord task = mTaskHistory.get(taskNdx); 1684 ActivityRecord r = task.topRunningActivityLocked(); 1685 if (r == null || r.finishing || !r.visible) { 1686 task.mLayerRank = -1; 1687 } else { 1688 task.mLayerRank = baseLayer + layer++; 1689 } 1690 } 1691 return layer; 1692 } 1693 1694 /** 1695 * Make sure that all activities that need to be visible (that is, they 1696 * currently can be seen by the user) actually are. 1697 */ 1698 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges, 1699 boolean preserveWindows) { 1700 ActivityRecord top = topRunningActivityLocked(); 1701 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "ensureActivitiesVisible behind " + top 1702 + " configChanges=0x" + Integer.toHexString(configChanges)); 1703 if (top != null) { 1704 checkTranslucentActivityWaiting(top); 1705 } 1706 1707 // If the top activity is not fullscreen, then we need to 1708 // make sure any activities under it are now visible. 1709 boolean aboveTop = top != null; 1710 final int stackVisibility = getStackVisibilityLocked(starting); 1711 final boolean stackInvisible = stackVisibility != STACK_VISIBLE; 1712 final boolean stackVisibleBehind = stackVisibility == STACK_VISIBLE_ACTIVITY_BEHIND; 1713 boolean behindFullscreenActivity = stackInvisible; 1714 boolean resumeNextActivity = isFocusable() && (isInStackLocked(starting) == null); 1715 boolean behindTranslucentActivity = false; 1716 final ActivityRecord visibleBehind = getVisibleBehindActivity(); 1717 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1718 final TaskRecord task = mTaskHistory.get(taskNdx); 1719 final ArrayList<ActivityRecord> activities = task.mActivities; 1720 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1721 final ActivityRecord r = activities.get(activityNdx); 1722 if (r.finishing) { 1723 // Normally the screenshot will be taken in makeInvisible(). When an activity 1724 // is finishing, we no longer change its visibility, but we still need to take 1725 // the screenshots if startPausingLocked decided it should be taken. 1726 if (r.mUpdateTaskThumbnailWhenHidden) { 1727 r.updateThumbnailLocked(screenshotActivitiesLocked(r), null); 1728 r.mUpdateTaskThumbnailWhenHidden = false; 1729 } 1730 continue; 1731 } 1732 final boolean isTop = r == top; 1733 if (aboveTop && !isTop) { 1734 continue; 1735 } 1736 aboveTop = false; 1737 1738 if (shouldBeVisible(r, behindTranslucentActivity, stackVisibleBehind, 1739 visibleBehind, behindFullscreenActivity)) { 1740 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make visible? " + r 1741 + " finishing=" + r.finishing + " state=" + r.state); 1742 // First: if this is not the current activity being started, make 1743 // sure it matches the current configuration. 1744 if (r != starting) { 1745 ensureActivityConfigurationLocked(r, 0, preserveWindows); 1746 } 1747 1748 if (r.app == null || r.app.thread == null) { 1749 if (makeVisibleAndRestartIfNeeded(starting, configChanges, isTop, 1750 resumeNextActivity, r)) { 1751 if (activityNdx >= activities.size()) { 1752 // Record may be removed if its process needs to restart. 1753 activityNdx = activities.size() - 1; 1754 } else { 1755 resumeNextActivity = false; 1756 } 1757 } 1758 } else if (r.visible) { 1759 // If this activity is already visible, then there is nothing to do here. 1760 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1761 "Skipping: already visible at " + r); 1762 1763 if (handleAlreadyVisible(r)) { 1764 resumeNextActivity = false; 1765 } 1766 } else { 1767 makeVisibleIfNeeded(starting, r); 1768 } 1769 // Aggregate current change flags. 1770 configChanges |= r.configChangeFlags; 1771 behindFullscreenActivity = updateBehindFullscreen(stackInvisible, 1772 behindFullscreenActivity, task, r); 1773 if (behindFullscreenActivity && !r.fullscreen) { 1774 behindTranslucentActivity = true; 1775 } 1776 } else { 1777 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make invisible? " + r 1778 + " finishing=" + r.finishing + " state=" + r.state + " stackInvisible=" 1779 + stackInvisible + " behindFullscreenActivity=" 1780 + behindFullscreenActivity + " mLaunchTaskBehind=" 1781 + r.mLaunchTaskBehind); 1782 makeInvisible(r, visibleBehind); 1783 } 1784 } 1785 if (mStackId == FREEFORM_WORKSPACE_STACK_ID) { 1786 // The visibility of tasks and the activities they contain in freeform stack are 1787 // determined individually unlike other stacks where the visibility or fullscreen 1788 // status of an activity in a previous task affects other. 1789 behindFullscreenActivity = stackVisibility == STACK_INVISIBLE; 1790 } else if (mStackId == HOME_STACK_ID) { 1791 if (task.isHomeTask()) { 1792 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Home task: at " + task 1793 + " stackInvisible=" + stackInvisible 1794 + " behindFullscreenActivity=" + behindFullscreenActivity); 1795 // No other task in the home stack should be visible behind the home activity. 1796 // Home activities is usually a translucent activity with the wallpaper behind 1797 // them. However, when they don't have the wallpaper behind them, we want to 1798 // show activities in the next application stack behind them vs. another 1799 // task in the home stack like recents. 1800 behindFullscreenActivity = true; 1801 } else if (task.isRecentsTask() 1802 && task.getTaskToReturnTo() == APPLICATION_ACTIVITY_TYPE) { 1803 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1804 "Recents task returning to app: at " + task 1805 + " stackInvisible=" + stackInvisible 1806 + " behindFullscreenActivity=" + behindFullscreenActivity); 1807 // We don't want any other tasks in the home stack visible if the recents 1808 // activity is going to be returning to an application activity type. 1809 // We do this to preserve the visible order the user used to get into the 1810 // recents activity. The recents activity is normally translucent and if it 1811 // doesn't have the wallpaper behind it the next activity in the home stack 1812 // shouldn't be visible when the home stack is brought to the front to display 1813 // the recents activity from an app. 1814 behindFullscreenActivity = true; 1815 } 1816 1817 } 1818 } 1819 1820 if (mTranslucentActivityWaiting != null && 1821 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1822 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1823 notifyActivityDrawnLocked(null); 1824 } 1825 } 1826 1827 /** Return true if the input activity should be made visible */ 1828 private boolean shouldBeVisible(ActivityRecord r, boolean behindTranslucentActivity, 1829 boolean stackVisibleBehind, ActivityRecord visibleBehind, 1830 boolean behindFullscreenActivity) { 1831 1832 if (!okToShowLocked(r) 1833 || (mService.isSleepingOrShuttingDownLocked() && r.voiceSession == null)) { 1834 return false; 1835 } 1836 1837 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1838 // but must be drawn initially for the animation as though they were visible. 1839 final boolean activityVisibleBehind = 1840 (behindTranslucentActivity || stackVisibleBehind) && visibleBehind == r; 1841 1842 boolean isVisible = 1843 !behindFullscreenActivity || r.mLaunchTaskBehind || activityVisibleBehind; 1844 1845 if (mService.mSupportsLeanbackOnly && isVisible && r.isRecentsActivity()) { 1846 // On devices that support leanback only (Android TV), Recents activity can only be 1847 // visible if the home stack is the focused stack or we are in split-screen mode. 1848 isVisible = mStackSupervisor.getStack(DOCKED_STACK_ID) != null 1849 || mStackSupervisor.isFocusedStack(this); 1850 } 1851 1852 return isVisible; 1853 } 1854 1855 private void checkTranslucentActivityWaiting(ActivityRecord top) { 1856 if (mTranslucentActivityWaiting != top) { 1857 mUndrawnActivitiesBelowTopTranslucent.clear(); 1858 if (mTranslucentActivityWaiting != null) { 1859 // Call the callback with a timeout indication. 1860 notifyActivityDrawnLocked(null); 1861 mTranslucentActivityWaiting = null; 1862 } 1863 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1864 } 1865 } 1866 1867 private boolean makeVisibleAndRestartIfNeeded(ActivityRecord starting, int configChanges, 1868 boolean isTop, boolean andResume, ActivityRecord r) { 1869 // We need to make sure the app is running if it's the top, or it is just made visible from 1870 // invisible. If the app is already visible, it must have died while it was visible. In this 1871 // case, we'll show the dead window but will not restart the app. Otherwise we could end up 1872 // thrashing. 1873 if (isTop || !r.visible) { 1874 // This activity needs to be visible, but isn't even running... 1875 // get it started and resume if no other stack in this stack is resumed. 1876 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Start and freeze screen for " + r); 1877 if (r != starting) { 1878 r.startFreezingScreenLocked(r.app, configChanges); 1879 } 1880 if (!r.visible || r.mLaunchTaskBehind) { 1881 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Starting and making visible: " + r); 1882 setVisible(r, true); 1883 } 1884 if (r != starting) { 1885 mStackSupervisor.startSpecificActivityLocked(r, andResume, false); 1886 return true; 1887 } 1888 } 1889 return false; 1890 } 1891 1892 private void makeInvisible(ActivityRecord r, ActivityRecord visibleBehind) { 1893 if (!r.visible) { 1894 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r); 1895 return; 1896 } 1897 // Now for any activities that aren't visible to the user, make sure they no longer are 1898 // keeping the screen frozen. 1899 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r + " " + r.state); 1900 try { 1901 setVisible(r, false); 1902 switch (r.state) { 1903 case STOPPING: 1904 case STOPPED: 1905 if (r.app != null && r.app.thread != null) { 1906 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1907 "Scheduling invisibility: " + r); 1908 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1909 } 1910 break; 1911 1912 case INITIALIZING: 1913 case RESUMED: 1914 case PAUSING: 1915 case PAUSED: 1916 // This case created for transitioning activities from 1917 // translucent to opaque {@link Activity#convertToOpaque}. 1918 if (visibleBehind == r) { 1919 releaseBackgroundResources(r); 1920 } else { 1921 addToStopping(r, true /* immediate */); 1922 } 1923 break; 1924 1925 default: 1926 break; 1927 } 1928 } catch (Exception e) { 1929 // Just skip on any failure; we'll make it visible when it next restarts. 1930 Slog.w(TAG, "Exception thrown making hidden: " + r.intent.getComponent(), e); 1931 } 1932 } 1933 1934 private boolean updateBehindFullscreen(boolean stackInvisible, boolean behindFullscreenActivity, 1935 TaskRecord task, ActivityRecord r) { 1936 if (r.fullscreen) { 1937 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r 1938 + " stackInvisible=" + stackInvisible 1939 + " behindFullscreenActivity=" + behindFullscreenActivity); 1940 // At this point, nothing else needs to be shown in this task. 1941 behindFullscreenActivity = true; 1942 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1943 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r 1944 + " stackInvisible=" + stackInvisible 1945 + " behindFullscreenActivity=" + behindFullscreenActivity); 1946 behindFullscreenActivity = true; 1947 } 1948 return behindFullscreenActivity; 1949 } 1950 1951 private void makeVisibleIfNeeded(ActivityRecord starting, ActivityRecord r) { 1952 1953 // This activity is not currently visible, but is running. Tell it to become visible. 1954 if (r.state == ActivityState.RESUMED || r == starting) { 1955 if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY, 1956 "Not making visible, r=" + r + " state=" + r.state + " starting=" + starting); 1957 return; 1958 } 1959 1960 // If this activity is paused, tell it to now show its window. 1961 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1962 "Making visible and scheduling visibility: " + r); 1963 try { 1964 if (mTranslucentActivityWaiting != null) { 1965 r.updateOptionsLocked(r.returningOptions); 1966 mUndrawnActivitiesBelowTopTranslucent.add(r); 1967 } 1968 setVisible(r, true); 1969 r.sleeping = false; 1970 r.app.pendingUiClean = true; 1971 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1972 // The activity may be waiting for stop, but that is no longer 1973 // appropriate for it. 1974 mStackSupervisor.mStoppingActivities.remove(r); 1975 mStackSupervisor.mGoingToSleepActivities.remove(r); 1976 } catch (Exception e) { 1977 // Just skip on any failure; we'll make it 1978 // visible when it next restarts. 1979 Slog.w(TAG, "Exception thrown making visibile: " + r.intent.getComponent(), e); 1980 } 1981 handleAlreadyVisible(r); 1982 } 1983 1984 private boolean handleAlreadyVisible(ActivityRecord r) { 1985 r.stopFreezingScreenLocked(false); 1986 try { 1987 if (r.returningOptions != null) { 1988 r.app.thread.scheduleOnNewActivityOptions(r.appToken, r.returningOptions); 1989 } 1990 } catch(RemoteException e) { 1991 } 1992 return r.state == ActivityState.RESUMED; 1993 } 1994 1995 void convertActivityToTranslucent(ActivityRecord r) { 1996 mTranslucentActivityWaiting = r; 1997 mUndrawnActivitiesBelowTopTranslucent.clear(); 1998 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1999 } 2000 2001 void clearOtherAppTimeTrackers(AppTimeTracker except) { 2002 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2003 final TaskRecord task = mTaskHistory.get(taskNdx); 2004 final ArrayList<ActivityRecord> activities = task.mActivities; 2005 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2006 final ActivityRecord r = activities.get(activityNdx); 2007 if ( r.appTimeTracker != except) { 2008 r.appTimeTracker = null; 2009 } 2010 } 2011 } 2012 } 2013 2014 /** 2015 * Called as activities below the top translucent activity are redrawn. When the last one is 2016 * redrawn notify the top activity by calling 2017 * {@link Activity#onTranslucentConversionComplete}. 2018 * 2019 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 2020 * occurred and the activity will be notified immediately. 2021 */ 2022 void notifyActivityDrawnLocked(ActivityRecord r) { 2023 mActivityContainer.setDrawn(); 2024 if ((r == null) 2025 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 2026 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 2027 // The last undrawn activity below the top has just been drawn. If there is an 2028 // opaque activity at the top, notify it that it can become translucent safely now. 2029 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 2030 mTranslucentActivityWaiting = null; 2031 mUndrawnActivitiesBelowTopTranslucent.clear(); 2032 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 2033 2034 if (waitingActivity != null) { 2035 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 2036 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 2037 try { 2038 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 2039 waitingActivity.appToken, r != null); 2040 } catch (RemoteException e) { 2041 } 2042 } 2043 } 2044 } 2045 } 2046 2047 /** If any activities below the top running one are in the INITIALIZING state and they have a 2048 * starting window displayed then remove that starting window. It is possible that the activity 2049 * in this state will never resumed in which case that starting window will be orphaned. */ 2050 void cancelInitializingActivities() { 2051 final ActivityRecord topActivity = topRunningActivityLocked(); 2052 boolean aboveTop = true; 2053 // We don't want to clear starting window for activities that aren't behind fullscreen 2054 // activities as we need to display their starting window until they are done initializing. 2055 boolean behindFullscreenActivity = false; 2056 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2057 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2058 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2059 final ActivityRecord r = activities.get(activityNdx); 2060 if (aboveTop) { 2061 if (r == topActivity) { 2062 aboveTop = false; 2063 } 2064 behindFullscreenActivity |= r.fullscreen; 2065 continue; 2066 } 2067 2068 if (r.state == ActivityState.INITIALIZING 2069 && r.mStartingWindowState == STARTING_WINDOW_SHOWN 2070 && behindFullscreenActivity) { 2071 if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, 2072 "Found orphaned starting window " + r); 2073 r.mStartingWindowState = STARTING_WINDOW_REMOVED; 2074 mWindowManager.removeAppStartingWindow(r.appToken); 2075 } 2076 2077 behindFullscreenActivity |= r.fullscreen; 2078 } 2079 } 2080 } 2081 2082 /** 2083 * Ensure that the top activity in the stack is resumed. 2084 * 2085 * @param prev The previously resumed activity, for when in the process 2086 * of pausing; can be null to call from elsewhere. 2087 * @param options Activity options. 2088 * 2089 * @return Returns true if something is being resumed, or false if 2090 * nothing happened. 2091 * 2092 * NOTE: It is not safe to call this method directly as it can cause an activity in a 2093 * non-focused stack to be resumed. 2094 * Use {@link ActivityStackSupervisor#resumeFocusedStackTopActivityLocked} to resume the 2095 * right activity for the current system state. 2096 */ 2097 boolean resumeTopActivityUncheckedLocked(ActivityRecord prev, ActivityOptions options) { 2098 if (mStackSupervisor.inResumeTopActivity) { 2099 // Don't even start recursing. 2100 return false; 2101 } 2102 2103 boolean result = false; 2104 try { 2105 // Protect against recursion. 2106 mStackSupervisor.inResumeTopActivity = true; 2107 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 2108 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 2109 mService.updateSleepIfNeededLocked(); 2110 } 2111 result = resumeTopActivityInnerLocked(prev, options); 2112 } finally { 2113 mStackSupervisor.inResumeTopActivity = false; 2114 } 2115 return result; 2116 } 2117 2118 private boolean resumeTopActivityInnerLocked(ActivityRecord prev, ActivityOptions options) { 2119 if (DEBUG_LOCKSCREEN) mService.logLockScreen(""); 2120 2121 if (!mService.mBooting && !mService.mBooted) { 2122 // Not ready yet! 2123 return false; 2124 } 2125 2126 ActivityRecord parent = mActivityContainer.mParentActivity; 2127 if ((parent != null && parent.state != ActivityState.RESUMED) || 2128 !mActivityContainer.isAttachedLocked()) { 2129 // Do not resume this stack if its parent is not resumed. 2130 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 2131 return false; 2132 } 2133 2134 mStackSupervisor.cancelInitializingActivities(); 2135 2136 // Find the first activity that is not finishing. 2137 final ActivityRecord next = topRunningActivityLocked(); 2138 2139 // Remember how we'll process this pause/resume situation, and ensure 2140 // that the state is reset however we wind up proceeding. 2141 final boolean userLeaving = mStackSupervisor.mUserLeaving; 2142 mStackSupervisor.mUserLeaving = false; 2143 2144 final TaskRecord prevTask = prev != null ? prev.task : null; 2145 if (next == null) { 2146 // There are no more activities! 2147 final String reason = "noMoreActivities"; 2148 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() 2149 ? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2150 if (!mFullscreen && adjustFocusToNextFocusableStackLocked(returnTaskType, reason)) { 2151 // Try to move focus to the next visible stack with a running activity if this 2152 // stack is not covering the entire screen. 2153 return mStackSupervisor.resumeFocusedStackTopActivityLocked( 2154 mStackSupervisor.getFocusedStack(), prev, null); 2155 } 2156 2157 // Let's just start up the Launcher... 2158 ActivityOptions.abort(options); 2159 if (DEBUG_STATES) Slog.d(TAG_STATES, 2160 "resumeTopActivityLocked: No more activities go home"); 2161 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2162 // Only resume home if on home display 2163 return isOnHomeDisplay() && 2164 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); 2165 } 2166 2167 next.delayedResume = false; 2168 2169 // If the top activity is the resumed one, nothing to do. 2170 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 2171 mStackSupervisor.allResumedActivitiesComplete()) { 2172 // Make sure we have executed any pending transitions, since there 2173 // should be nothing left to do at this point. 2174 mWindowManager.executeAppTransition(); 2175 mNoAnimActivities.clear(); 2176 ActivityOptions.abort(options); 2177 if (DEBUG_STATES) Slog.d(TAG_STATES, 2178 "resumeTopActivityLocked: Top activity resumed " + next); 2179 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2180 return false; 2181 } 2182 2183 final TaskRecord nextTask = next.task; 2184 if (prevTask != null && prevTask.stack == this && 2185 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 2186 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2187 if (prevTask == nextTask) { 2188 prevTask.setFrontOfTask(); 2189 } else if (prevTask != topTask()) { 2190 // This task is going away but it was supposed to return to the home stack. 2191 // Now the task above it has to return to the home task instead. 2192 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 2193 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 2194 } else if (!isOnHomeDisplay()) { 2195 return false; 2196 } else if (!isHomeStack()){ 2197 if (DEBUG_STATES) Slog.d(TAG_STATES, 2198 "resumeTopActivityLocked: Launching home next"); 2199 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 2200 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2201 return isOnHomeDisplay() && 2202 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); 2203 } 2204 } 2205 2206 // If we are sleeping, and there is no resumed activity, and the top 2207 // activity is paused, well that is the state we want. 2208 if (mService.isSleepingOrShuttingDownLocked() 2209 && mLastPausedActivity == next 2210 && mStackSupervisor.allPausedActivitiesComplete()) { 2211 // Make sure we have executed any pending transitions, since there 2212 // should be nothing left to do at this point. 2213 mWindowManager.executeAppTransition(); 2214 mNoAnimActivities.clear(); 2215 ActivityOptions.abort(options); 2216 if (DEBUG_STATES) Slog.d(TAG_STATES, 2217 "resumeTopActivityLocked: Going to sleep and all paused"); 2218 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2219 return false; 2220 } 2221 2222 // Make sure that the user who owns this activity is started. If not, 2223 // we will just leave it as is because someone should be bringing 2224 // another user's activities to the top of the stack. 2225 if (!mService.mUserController.hasStartedUserState(next.userId)) { 2226 Slog.w(TAG, "Skipping resume of top activity " + next 2227 + ": user " + next.userId + " is stopped"); 2228 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2229 return false; 2230 } 2231 2232 // The activity may be waiting for stop, but that is no longer 2233 // appropriate for it. 2234 mStackSupervisor.mStoppingActivities.remove(next); 2235 mStackSupervisor.mGoingToSleepActivities.remove(next); 2236 next.sleeping = false; 2237 mStackSupervisor.mWaitingVisibleActivities.remove(next); 2238 2239 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next); 2240 2241 // If we are currently pausing an activity, then don't do anything until that is done. 2242 if (!mStackSupervisor.allPausedActivitiesComplete()) { 2243 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE, 2244 "resumeTopActivityLocked: Skip resume: some activity pausing."); 2245 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2246 return false; 2247 } 2248 2249 mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); 2250 2251 // We need to start pausing the current activity so the top one can be resumed... 2252 final boolean dontWaitForPause = (next.info.flags & FLAG_RESUME_WHILE_PAUSING) != 0; 2253 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 2254 if (mResumedActivity != null) { 2255 if (DEBUG_STATES) Slog.d(TAG_STATES, 2256 "resumeTopActivityLocked: Pausing " + mResumedActivity); 2257 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 2258 } 2259 if (pausing) { 2260 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES, 2261 "resumeTopActivityLocked: Skip resume: need to start pausing"); 2262 // At this point we want to put the upcoming activity's process 2263 // at the top of the LRU list, since we know we will be needing it 2264 // very soon and it would be a waste to let it get killed if it 2265 // happens to be sitting towards the end. 2266 if (next.app != null && next.app.thread != null) { 2267 mService.updateLruProcessLocked(next.app, true, null); 2268 } 2269 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2270 return true; 2271 } else if (mResumedActivity == next && next.state == ActivityState.RESUMED && 2272 mStackSupervisor.allResumedActivitiesComplete()) { 2273 // It is possible for the activity to be resumed when we paused back stacks above if the 2274 // next activity doesn't have to wait for pause to complete. 2275 // So, nothing else to-do except: 2276 // Make sure we have executed any pending transitions, since there 2277 // should be nothing left to do at this point. 2278 mWindowManager.executeAppTransition(); 2279 mNoAnimActivities.clear(); 2280 ActivityOptions.abort(options); 2281 if (DEBUG_STATES) Slog.d(TAG_STATES, 2282 "resumeTopActivityLocked: Top activity resumed (dontWaitForPause) " + next); 2283 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2284 return true; 2285 } 2286 2287 // If the most recent activity was noHistory but was only stopped rather 2288 // than stopped+finished because the device went to sleep, we need to make 2289 // sure to finish it as we're making a new activity topmost. 2290 if (mService.isSleepingLocked() && mLastNoHistoryActivity != null && 2291 !mLastNoHistoryActivity.finishing) { 2292 if (DEBUG_STATES) Slog.d(TAG_STATES, 2293 "no-history finish of " + mLastNoHistoryActivity + " on new resume"); 2294 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 2295 null, "resume-no-history", false); 2296 mLastNoHistoryActivity = null; 2297 } 2298 2299 if (prev != null && prev != next) { 2300 if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2301 && next != null && !next.nowVisible) { 2302 mStackSupervisor.mWaitingVisibleActivities.add(prev); 2303 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2304 "Resuming top, waiting visible to hide: " + prev); 2305 } else { 2306 // The next activity is already visible, so hide the previous 2307 // activity's windows right now so we can show the new one ASAP. 2308 // We only do this if the previous is finishing, which should mean 2309 // it is on top of the one being resumed so hiding it quickly 2310 // is good. Otherwise, we want to do the normal route of allowing 2311 // the resumed activity to be shown so we can decide if the 2312 // previous should actually be hidden depending on whether the 2313 // new one is found to be full-screen or not. 2314 if (prev.finishing) { 2315 mWindowManager.setAppVisibility(prev.appToken, false); 2316 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2317 "Not waiting for visible to hide: " + prev + ", waitingVisible=" 2318 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2319 + ", nowVisible=" + next.nowVisible); 2320 } else { 2321 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2322 "Previous already visible but still waiting to hide: " + prev 2323 + ", waitingVisible=" 2324 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2325 + ", nowVisible=" + next.nowVisible); 2326 } 2327 } 2328 } 2329 2330 // Launching this app's activity, make sure the app is no longer 2331 // considered stopped. 2332 try { 2333 AppGlobals.getPackageManager().setPackageStoppedState( 2334 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 2335 } catch (RemoteException e1) { 2336 } catch (IllegalArgumentException e) { 2337 Slog.w(TAG, "Failed trying to unstop package " 2338 + next.packageName + ": " + e); 2339 } 2340 2341 // We are starting up the next activity, so tell the window manager 2342 // that the previous one will be hidden soon. This way it can know 2343 // to ignore it when computing the desired screen orientation. 2344 boolean anim = true; 2345 if (prev != null) { 2346 if (prev.finishing) { 2347 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2348 "Prepare close transition: prev=" + prev); 2349 if (mNoAnimActivities.contains(prev)) { 2350 anim = false; 2351 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2352 } else { 2353 mWindowManager.prepareAppTransition(prev.task == next.task 2354 ? TRANSIT_ACTIVITY_CLOSE 2355 : TRANSIT_TASK_CLOSE, false); 2356 } 2357 mWindowManager.setAppVisibility(prev.appToken, false); 2358 } else { 2359 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2360 "Prepare open transition: prev=" + prev); 2361 if (mNoAnimActivities.contains(next)) { 2362 anim = false; 2363 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2364 } else { 2365 mWindowManager.prepareAppTransition(prev.task == next.task 2366 ? TRANSIT_ACTIVITY_OPEN 2367 : next.mLaunchTaskBehind 2368 ? TRANSIT_TASK_OPEN_BEHIND 2369 : TRANSIT_TASK_OPEN, false); 2370 } 2371 } 2372 } else { 2373 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous"); 2374 if (mNoAnimActivities.contains(next)) { 2375 anim = false; 2376 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2377 } else { 2378 mWindowManager.prepareAppTransition(TRANSIT_ACTIVITY_OPEN, false); 2379 } 2380 } 2381 2382 Bundle resumeAnimOptions = null; 2383 if (anim) { 2384 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 2385 if (opts != null) { 2386 resumeAnimOptions = opts.toBundle(); 2387 } 2388 next.applyOptionsLocked(); 2389 } else { 2390 next.clearOptionsLocked(); 2391 } 2392 2393 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2394 if (next.app != null && next.app.thread != null) { 2395 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next 2396 + " stopped=" + next.stopped + " visible=" + next.visible); 2397 2398 // If the previous activity is translucent, force a visibility update of 2399 // the next activity, so that it's added to WM's opening app list, and 2400 // transition animation can be set up properly. 2401 // For example, pressing Home button with a translucent activity in focus. 2402 // Launcher is already visible in this case. If we don't add it to opening 2403 // apps, maybeUpdateTransitToWallpaper() will fail to identify this as a 2404 // TRANSIT_WALLPAPER_OPEN animation, and run some funny animation. 2405 final boolean lastActivityTranslucent = lastStack != null 2406 && (!lastStack.mFullscreen 2407 || (lastStack.mLastPausedActivity != null 2408 && !lastStack.mLastPausedActivity.fullscreen)); 2409 2410 // This activity is now becoming visible. 2411 if (!next.visible || next.stopped || lastActivityTranslucent) { 2412 mWindowManager.setAppVisibility(next.appToken, true); 2413 } 2414 2415 // schedule launch ticks to collect information about slow apps. 2416 next.startLaunchTickingLocked(); 2417 2418 ActivityRecord lastResumedActivity = 2419 lastStack == null ? null :lastStack.mResumedActivity; 2420 ActivityState lastState = next.state; 2421 2422 mService.updateCpuStats(); 2423 2424 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)"); 2425 next.state = ActivityState.RESUMED; 2426 mResumedActivity = next; 2427 next.task.touchActiveTime(); 2428 mRecentTasks.addLocked(next.task); 2429 mService.updateLruProcessLocked(next.app, true, null); 2430 updateLRUListLocked(next); 2431 mService.updateOomAdjLocked(); 2432 2433 // Have the window manager re-evaluate the orientation of 2434 // the screen based on the new activity order. 2435 boolean notUpdated = true; 2436 if (mStackSupervisor.isFocusedStack(this)) { 2437 Configuration config = mWindowManager.updateOrientationFromAppTokens( 2438 mService.mConfiguration, 2439 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 2440 if (config != null) { 2441 next.frozenBeforeDestroy = true; 2442 } 2443 notUpdated = !mService.updateConfigurationLocked(config, next, false); 2444 } 2445 2446 if (notUpdated) { 2447 // The configuration update wasn't able to keep the existing 2448 // instance of the activity, and instead started a new one. 2449 // We should be all done, but let's just make sure our activity 2450 // is still at the top and schedule another run if something 2451 // weird happened. 2452 ActivityRecord nextNext = topRunningActivityLocked(); 2453 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES, 2454 "Activity config changed during resume: " + next 2455 + ", new next: " + nextNext); 2456 if (nextNext != next) { 2457 // Do over! 2458 mStackSupervisor.scheduleResumeTopActivities(); 2459 } 2460 if (mStackSupervisor.reportResumedActivityLocked(next)) { 2461 mNoAnimActivities.clear(); 2462 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2463 return true; 2464 } 2465 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2466 return false; 2467 } 2468 2469 try { 2470 // Deliver all pending results. 2471 ArrayList<ResultInfo> a = next.results; 2472 if (a != null) { 2473 final int N = a.size(); 2474 if (!next.finishing && N > 0) { 2475 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, 2476 "Delivering results to " + next + ": " + a); 2477 next.app.thread.scheduleSendResult(next.appToken, a); 2478 } 2479 } 2480 2481 if (next.newIntents != null) { 2482 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 2483 } 2484 2485 // Well the app will no longer be stopped. 2486 // Clear app token stopped state in window manager if needed. 2487 mWindowManager.notifyAppStopped(next.appToken, false); 2488 2489 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, 2490 System.identityHashCode(next), next.task.taskId, next.shortComponentName); 2491 2492 next.sleeping = false; 2493 mService.showUnsupportedZoomDialogIfNeededLocked(next); 2494 mService.showAskCompatModeDialogLocked(next); 2495 next.app.pendingUiClean = true; 2496 next.app.forceProcessStateUpTo(mService.mTopProcessState); 2497 next.clearOptionsLocked(); 2498 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 2499 mService.isNextTransitionForward(), resumeAnimOptions); 2500 2501 mStackSupervisor.checkReadyForSleepLocked(); 2502 2503 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next); 2504 } catch (Exception e) { 2505 // Whoops, need to restart this activity! 2506 if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to " 2507 + lastState + ": " + next); 2508 next.state = lastState; 2509 if (lastStack != null) { 2510 lastStack.mResumedActivity = lastResumedActivity; 2511 } 2512 Slog.i(TAG, "Restarting because process died: " + next); 2513 if (!next.hasBeenLaunched) { 2514 next.hasBeenLaunched = true; 2515 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 2516 mStackSupervisor.isFrontStack(lastStack)) { 2517 next.showStartingWindow(null, true); 2518 } 2519 mStackSupervisor.startSpecificActivityLocked(next, true, false); 2520 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2521 return true; 2522 } 2523 2524 // From this point on, if something goes wrong there is no way 2525 // to recover the activity. 2526 try { 2527 completeResumeLocked(next); 2528 } catch (Exception e) { 2529 // If any exception gets thrown, toss away this 2530 // activity and try the next one. 2531 Slog.w(TAG, "Exception thrown during resume of " + next, e); 2532 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 2533 "resume-exception", true); 2534 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2535 return true; 2536 } 2537 } else { 2538 // Whoops, need to restart this activity! 2539 if (!next.hasBeenLaunched) { 2540 next.hasBeenLaunched = true; 2541 } else { 2542 if (SHOW_APP_STARTING_PREVIEW) { 2543 next.showStartingWindow(null, true); 2544 } 2545 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next); 2546 } 2547 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next); 2548 mStackSupervisor.startSpecificActivityLocked(next, true, true); 2549 } 2550 2551 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2552 return true; 2553 } 2554 2555 private TaskRecord getNextTask(TaskRecord targetTask) { 2556 final int index = mTaskHistory.indexOf(targetTask); 2557 if (index >= 0) { 2558 final int numTasks = mTaskHistory.size(); 2559 for (int i = index + 1; i < numTasks; ++i) { 2560 TaskRecord task = mTaskHistory.get(i); 2561 if (task.userId == targetTask.userId) { 2562 return task; 2563 } 2564 } 2565 } 2566 return null; 2567 } 2568 2569 private void insertTaskAtPosition(TaskRecord task, int position) { 2570 if (position >= mTaskHistory.size()) { 2571 insertTaskAtTop(task, null); 2572 return; 2573 } 2574 // Calculate maximum possible position for this task. 2575 int maxPosition = mTaskHistory.size(); 2576 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) 2577 && task.topRunningActivityLocked() == null) { 2578 // Put non-current user tasks below current user tasks. 2579 while (maxPosition > 0) { 2580 final TaskRecord tmpTask = mTaskHistory.get(maxPosition - 1); 2581 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2582 || tmpTask.topRunningActivityLocked() == null) { 2583 break; 2584 } 2585 maxPosition--; 2586 } 2587 } 2588 position = Math.min(position, maxPosition); 2589 mTaskHistory.remove(task); 2590 mTaskHistory.add(position, task); 2591 updateTaskMovement(task, true); 2592 } 2593 2594 private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) { 2595 // If the moving task is over home stack, transfer its return type to next task 2596 if (task.isOverHomeStack()) { 2597 final TaskRecord nextTask = getNextTask(task); 2598 if (nextTask != null) { 2599 nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); 2600 } 2601 } 2602 2603 // If this is being moved to the top by another activity or being launched from the home 2604 // activity, set mTaskToReturnTo accordingly. 2605 if (isOnHomeDisplay()) { 2606 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2607 final boolean fromHome = lastStack.isHomeStack(); 2608 if (!isHomeStack() && (fromHome || topTask() != task)) { 2609 int returnToType = APPLICATION_ACTIVITY_TYPE; 2610 if (fromHome && StackId.allowTopTaskToReturnHome(mStackId)) { 2611 returnToType = lastStack.topTask() == null 2612 ? HOME_ACTIVITY_TYPE : lastStack.topTask().taskType; 2613 } 2614 task.setTaskToReturnTo(returnToType); 2615 } 2616 } else { 2617 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 2618 } 2619 2620 mTaskHistory.remove(task); 2621 // Now put task at top. 2622 int taskNdx = mTaskHistory.size(); 2623 final boolean notShownWhenLocked = 2624 (newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) 2625 || (newActivity == null && task.topRunningActivityLocked() == null); 2626 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) { 2627 // Put non-current user tasks below current user tasks. 2628 while (--taskNdx >= 0) { 2629 final TaskRecord tmpTask = mTaskHistory.get(taskNdx); 2630 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2631 || tmpTask.topRunningActivityLocked() == null) { 2632 break; 2633 } 2634 } 2635 ++taskNdx; 2636 } 2637 mTaskHistory.add(taskNdx, task); 2638 updateTaskMovement(task, true); 2639 } 2640 2641 final void startActivityLocked(ActivityRecord r, boolean newTask, boolean keepCurTransition, 2642 ActivityOptions options) { 2643 TaskRecord rTask = r.task; 2644 final int taskId = rTask.taskId; 2645 // mLaunchTaskBehind tasks get placed at the back of the task stack. 2646 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 2647 // Last activity in task had been removed or ActivityManagerService is reusing task. 2648 // Insert or replace. 2649 // Might not even be in. 2650 insertTaskAtTop(rTask, r); 2651 mWindowManager.moveTaskToTop(taskId); 2652 } 2653 TaskRecord task = null; 2654 if (!newTask) { 2655 // If starting in an existing task, find where that is... 2656 boolean startIt = true; 2657 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2658 task = mTaskHistory.get(taskNdx); 2659 if (task.getTopActivity() == null) { 2660 // All activities in task are finishing. 2661 continue; 2662 } 2663 if (task == r.task) { 2664 // Here it is! Now, if this is not yet visible to the 2665 // user, then just add it without starting; it will 2666 // get started when the user navigates back to it. 2667 if (!startIt) { 2668 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 2669 + task, new RuntimeException("here").fillInStackTrace()); 2670 task.addActivityToTop(r); 2671 r.putInHistory(); 2672 addConfigOverride(r, task); 2673 if (VALIDATE_TOKENS) { 2674 validateAppTokensLocked(); 2675 } 2676 ActivityOptions.abort(options); 2677 return; 2678 } 2679 break; 2680 } else if (task.numFullscreen > 0) { 2681 startIt = false; 2682 } 2683 } 2684 } 2685 2686 // Place a new activity at top of stack, so it is next to interact 2687 // with the user. 2688 2689 // If we are not placing the new activity frontmost, we do not want 2690 // to deliver the onUserLeaving callback to the actual frontmost 2691 // activity 2692 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2693 mStackSupervisor.mUserLeaving = false; 2694 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 2695 "startActivity() behind front, mUserLeaving=false"); 2696 } 2697 2698 task = r.task; 2699 2700 // Slot the activity into the history stack and proceed 2701 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2702 new RuntimeException("here").fillInStackTrace()); 2703 task.addActivityToTop(r); 2704 task.setFrontOfTask(); 2705 2706 r.putInHistory(); 2707 if (!isHomeStack() || numActivities() > 0) { 2708 // We want to show the starting preview window if we are 2709 // switching to a new task, or the next activity's process is 2710 // not currently running. 2711 boolean showStartingIcon = newTask; 2712 ProcessRecord proc = r.app; 2713 if (proc == null) { 2714 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2715 } 2716 if (proc == null || proc.thread == null) { 2717 showStartingIcon = true; 2718 } 2719 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2720 "Prepare open transition: starting " + r); 2721 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2722 mWindowManager.prepareAppTransition(TRANSIT_NONE, keepCurTransition); 2723 mNoAnimActivities.add(r); 2724 } else { 2725 mWindowManager.prepareAppTransition(newTask 2726 ? r.mLaunchTaskBehind 2727 ? TRANSIT_TASK_OPEN_BEHIND 2728 : TRANSIT_TASK_OPEN 2729 : TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2730 mNoAnimActivities.remove(r); 2731 } 2732 addConfigOverride(r, task); 2733 boolean doShow = true; 2734 if (newTask) { 2735 // Even though this activity is starting fresh, we still need 2736 // to reset it to make sure we apply affinities to move any 2737 // existing activities from other tasks in to it. 2738 // If the caller has requested that the target task be 2739 // reset, then do so. 2740 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2741 resetTaskIfNeededLocked(r, r); 2742 doShow = topRunningNonDelayedActivityLocked(null) == r; 2743 } 2744 } else if (options != null && options.getAnimationType() 2745 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2746 doShow = false; 2747 } 2748 if (r.mLaunchTaskBehind) { 2749 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2750 // tell WindowManager that r is visible even though it is at the back of the stack. 2751 mWindowManager.setAppVisibility(r.appToken, true); 2752 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 2753 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2754 // Figure out if we are transitioning from another activity that is 2755 // "has the same starting icon" as the next one. This allows the 2756 // window manager to keep the previous window it had previously 2757 // created, if it still had one. 2758 ActivityRecord prev = r.task.topRunningActivityWithStartingWindowLocked(); 2759 if (prev != null) { 2760 // We don't want to reuse the previous starting preview if: 2761 // (1) The current activity is in a different task. 2762 if (prev.task != r.task) { 2763 prev = null; 2764 } 2765 // (2) The current activity is already displayed. 2766 else if (prev.nowVisible) { 2767 prev = null; 2768 } 2769 } 2770 r.showStartingWindow(prev, showStartingIcon); 2771 } 2772 } else { 2773 // If this is the first activity, don't do any fancy animations, 2774 // because there is nothing for it to animate on top of. 2775 addConfigOverride(r, task); 2776 ActivityOptions.abort(options); 2777 options = null; 2778 } 2779 if (VALIDATE_TOKENS) { 2780 validateAppTokensLocked(); 2781 } 2782 } 2783 2784 final void validateAppTokensLocked() { 2785 mValidateAppTokens.clear(); 2786 mValidateAppTokens.ensureCapacity(numActivities()); 2787 final int numTasks = mTaskHistory.size(); 2788 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2789 TaskRecord task = mTaskHistory.get(taskNdx); 2790 final ArrayList<ActivityRecord> activities = task.mActivities; 2791 if (activities.isEmpty()) { 2792 continue; 2793 } 2794 TaskGroup group = new TaskGroup(); 2795 group.taskId = task.taskId; 2796 mValidateAppTokens.add(group); 2797 final int numActivities = activities.size(); 2798 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2799 final ActivityRecord r = activities.get(activityNdx); 2800 group.tokens.add(r.appToken); 2801 } 2802 } 2803 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2804 } 2805 2806 /** 2807 * Perform a reset of the given task, if needed as part of launching it. 2808 * Returns the new HistoryRecord at the top of the task. 2809 */ 2810 /** 2811 * Helper method for #resetTaskIfNeededLocked. 2812 * We are inside of the task being reset... we'll either finish this activity, push it out 2813 * for another task, or leave it as-is. 2814 * @param task The task containing the Activity (taskTop) that might be reset. 2815 * @param forceReset 2816 * @return An ActivityOptions that needs to be processed. 2817 */ 2818 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2819 ActivityOptions topOptions = null; 2820 2821 int replyChainEnd = -1; 2822 boolean canMoveOptions = true; 2823 2824 // We only do this for activities that are not the root of the task (since if we finish 2825 // the root, we may no longer have the task!). 2826 final ArrayList<ActivityRecord> activities = task.mActivities; 2827 final int numActivities = activities.size(); 2828 final int rootActivityNdx = task.findEffectiveRootIndex(); 2829 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2830 ActivityRecord target = activities.get(i); 2831 if (target.frontOfTask) 2832 break; 2833 2834 final int flags = target.info.flags; 2835 final boolean finishOnTaskLaunch = 2836 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2837 final boolean allowTaskReparenting = 2838 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2839 final boolean clearWhenTaskReset = 2840 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2841 2842 if (!finishOnTaskLaunch 2843 && !clearWhenTaskReset 2844 && target.resultTo != null) { 2845 // If this activity is sending a reply to a previous 2846 // activity, we can't do anything with it now until 2847 // we reach the start of the reply chain. 2848 // XXX note that we are assuming the result is always 2849 // to the previous activity, which is almost always 2850 // the case but we really shouldn't count on. 2851 if (replyChainEnd < 0) { 2852 replyChainEnd = i; 2853 } 2854 } else if (!finishOnTaskLaunch 2855 && !clearWhenTaskReset 2856 && allowTaskReparenting 2857 && target.taskAffinity != null 2858 && !target.taskAffinity.equals(task.affinity)) { 2859 // If this activity has an affinity for another 2860 // task, then we need to move it out of here. We will 2861 // move it as far out of the way as possible, to the 2862 // bottom of the activity stack. This also keeps it 2863 // correctly ordered with any activities we previously 2864 // moved. 2865 final TaskRecord targetTask; 2866 final ActivityRecord bottom = 2867 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2868 mTaskHistory.get(0).mActivities.get(0) : null; 2869 if (bottom != null && target.taskAffinity != null 2870 && target.taskAffinity.equals(bottom.task.affinity)) { 2871 // If the activity currently at the bottom has the 2872 // same task affinity as the one we are moving, 2873 // then merge it into the same task. 2874 targetTask = bottom.task; 2875 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2876 + " out to bottom task " + bottom.task); 2877 } else { 2878 targetTask = createTaskRecord( 2879 mStackSupervisor.getNextTaskIdForUserLocked(target.userId), 2880 target.info, null, null, null, false); 2881 targetTask.affinityIntent = target.intent; 2882 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2883 + " out to new task " + target.task); 2884 } 2885 2886 setAppTask(target, targetTask); 2887 2888 boolean noOptions = canMoveOptions; 2889 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2890 for (int srcPos = start; srcPos >= i; --srcPos) { 2891 final ActivityRecord p = activities.get(srcPos); 2892 if (p.finishing) { 2893 continue; 2894 } 2895 2896 canMoveOptions = false; 2897 if (noOptions && topOptions == null) { 2898 topOptions = p.takeOptionsLocked(); 2899 if (topOptions != null) { 2900 noOptions = false; 2901 } 2902 } 2903 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2904 "Removing activity " + p + " from task=" + task + " adding to task=" 2905 + targetTask + " Callers=" + Debug.getCallers(4)); 2906 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2907 "Pushing next activity " + p + " out to target's task " + target.task); 2908 p.setTask(targetTask, null); 2909 targetTask.addActivityAtBottom(p); 2910 2911 setAppTask(p, targetTask); 2912 } 2913 2914 mWindowManager.moveTaskToBottom(targetTask.taskId); 2915 if (VALIDATE_TOKENS) { 2916 validateAppTokensLocked(); 2917 } 2918 2919 replyChainEnd = -1; 2920 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2921 // If the activity should just be removed -- either 2922 // because it asks for it, or the task should be 2923 // cleared -- then finish it and anything that is 2924 // part of its reply chain. 2925 int end; 2926 if (clearWhenTaskReset) { 2927 // In this case, we want to finish this activity 2928 // and everything above it, so be sneaky and pretend 2929 // like these are all in the reply chain. 2930 end = activities.size() - 1; 2931 } else if (replyChainEnd < 0) { 2932 end = i; 2933 } else { 2934 end = replyChainEnd; 2935 } 2936 boolean noOptions = canMoveOptions; 2937 for (int srcPos = i; srcPos <= end; srcPos++) { 2938 ActivityRecord p = activities.get(srcPos); 2939 if (p.finishing) { 2940 continue; 2941 } 2942 canMoveOptions = false; 2943 if (noOptions && topOptions == null) { 2944 topOptions = p.takeOptionsLocked(); 2945 if (topOptions != null) { 2946 noOptions = false; 2947 } 2948 } 2949 if (DEBUG_TASKS) Slog.w(TAG_TASKS, 2950 "resetTaskIntendedTask: calling finishActivity on " + p); 2951 if (finishActivityLocked( 2952 p, Activity.RESULT_CANCELED, null, "reset-task", false)) { 2953 end--; 2954 srcPos--; 2955 } 2956 } 2957 replyChainEnd = -1; 2958 } else { 2959 // If we were in the middle of a chain, well the 2960 // activity that started it all doesn't want anything 2961 // special, so leave it all as-is. 2962 replyChainEnd = -1; 2963 } 2964 } 2965 2966 return topOptions; 2967 } 2968 2969 /** 2970 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2971 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2972 * @param affinityTask The task we are looking for an affinity to. 2973 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2974 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2975 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2976 */ 2977 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2978 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2979 int replyChainEnd = -1; 2980 final int taskId = task.taskId; 2981 final String taskAffinity = task.affinity; 2982 2983 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2984 final int numActivities = activities.size(); 2985 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2986 2987 // Do not operate on or below the effective root Activity. 2988 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2989 ActivityRecord target = activities.get(i); 2990 if (target.frontOfTask) 2991 break; 2992 2993 final int flags = target.info.flags; 2994 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2995 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2996 2997 if (target.resultTo != null) { 2998 // If this activity is sending a reply to a previous 2999 // activity, we can't do anything with it now until 3000 // we reach the start of the reply chain. 3001 // XXX note that we are assuming the result is always 3002 // to the previous activity, which is almost always 3003 // the case but we really shouldn't count on. 3004 if (replyChainEnd < 0) { 3005 replyChainEnd = i; 3006 } 3007 } else if (topTaskIsHigher 3008 && allowTaskReparenting 3009 && taskAffinity != null 3010 && taskAffinity.equals(target.taskAffinity)) { 3011 // This activity has an affinity for our task. Either remove it if we are 3012 // clearing or move it over to our task. Note that 3013 // we currently punt on the case where we are resetting a 3014 // task that is not at the top but who has activities above 3015 // with an affinity to it... this is really not a normal 3016 // case, and we will need to later pull that task to the front 3017 // and usually at that point we will do the reset and pick 3018 // up those remaining activities. (This only happens if 3019 // someone starts an activity in a new task from an activity 3020 // in a task that is not currently on top.) 3021 if (forceReset || finishOnTaskLaunch) { 3022 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 3023 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 3024 "Finishing task at index " + start + " to " + i); 3025 for (int srcPos = start; srcPos >= i; --srcPos) { 3026 final ActivityRecord p = activities.get(srcPos); 3027 if (p.finishing) { 3028 continue; 3029 } 3030 finishActivityLocked( 3031 p, Activity.RESULT_CANCELED, null, "move-affinity", false); 3032 } 3033 } else { 3034 if (taskInsertionPoint < 0) { 3035 taskInsertionPoint = task.mActivities.size(); 3036 3037 } 3038 3039 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 3040 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 3041 "Reparenting from task=" + affinityTask + ":" + start + "-" + i 3042 + " to task=" + task + ":" + taskInsertionPoint); 3043 for (int srcPos = start; srcPos >= i; --srcPos) { 3044 final ActivityRecord p = activities.get(srcPos); 3045 p.setTask(task, null); 3046 task.addActivityAtIndex(taskInsertionPoint, p); 3047 3048 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3049 "Removing and adding activity " + p + " to stack at " + task 3050 + " callers=" + Debug.getCallers(3)); 3051 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p 3052 + " from " + srcPos + " in to resetting task " + task); 3053 setAppTask(p, task); 3054 } 3055 mWindowManager.moveTaskToTop(taskId); 3056 if (VALIDATE_TOKENS) { 3057 validateAppTokensLocked(); 3058 } 3059 3060 // Now we've moved it in to place... but what if this is 3061 // a singleTop activity and we have put it on top of another 3062 // instance of the same activity? Then we drop the instance 3063 // below so it remains singleTop. 3064 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 3065 ArrayList<ActivityRecord> taskActivities = task.mActivities; 3066 int targetNdx = taskActivities.indexOf(target); 3067 if (targetNdx > 0) { 3068 ActivityRecord p = taskActivities.get(targetNdx - 1); 3069 if (p.intent.getComponent().equals(target.intent.getComponent())) { 3070 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 3071 false); 3072 } 3073 } 3074 } 3075 } 3076 3077 replyChainEnd = -1; 3078 } 3079 } 3080 return taskInsertionPoint; 3081 } 3082 3083 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 3084 ActivityRecord newActivity) { 3085 boolean forceReset = 3086 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 3087 if (ACTIVITY_INACTIVE_RESET_TIME > 0 3088 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 3089 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 3090 forceReset = true; 3091 } 3092 } 3093 3094 final TaskRecord task = taskTop.task; 3095 3096 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 3097 * for remaining tasks. Used for later tasks to reparent to task. */ 3098 boolean taskFound = false; 3099 3100 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 3101 ActivityOptions topOptions = null; 3102 3103 // Preserve the location for reparenting in the new task. 3104 int reparentInsertionPoint = -1; 3105 3106 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 3107 final TaskRecord targetTask = mTaskHistory.get(i); 3108 3109 if (targetTask == task) { 3110 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 3111 taskFound = true; 3112 } else { 3113 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 3114 taskFound, forceReset, reparentInsertionPoint); 3115 } 3116 } 3117 3118 int taskNdx = mTaskHistory.indexOf(task); 3119 if (taskNdx >= 0) { 3120 do { 3121 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 3122 } while (taskTop == null && taskNdx >= 0); 3123 } 3124 3125 if (topOptions != null) { 3126 // If we got some ActivityOptions from an activity on top that 3127 // was removed from the task, propagate them to the new real top. 3128 if (taskTop != null) { 3129 taskTop.updateOptionsLocked(topOptions); 3130 } else { 3131 topOptions.abort(); 3132 } 3133 } 3134 3135 return taskTop; 3136 } 3137 3138 void sendActivityResultLocked(int callingUid, ActivityRecord r, 3139 String resultWho, int requestCode, int resultCode, Intent data) { 3140 3141 if (callingUid > 0) { 3142 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 3143 data, r.getUriPermissionsLocked(), r.userId); 3144 } 3145 3146 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 3147 + " : who=" + resultWho + " req=" + requestCode 3148 + " res=" + resultCode + " data=" + data); 3149 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 3150 try { 3151 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 3152 list.add(new ResultInfo(resultWho, requestCode, 3153 resultCode, data)); 3154 r.app.thread.scheduleSendResult(r.appToken, list); 3155 return; 3156 } catch (Exception e) { 3157 Slog.w(TAG, "Exception thrown sending result to " + r, e); 3158 } 3159 } 3160 3161 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 3162 } 3163 3164 private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { 3165 if (!mStackSupervisor.isFocusedStack(this) || mService.mFocusedActivity != r) { 3166 return; 3167 } 3168 3169 final ActivityRecord next = topRunningActivityLocked(); 3170 final String myReason = reason + " adjustFocus"; 3171 if (next != r) { 3172 if (next != null && StackId.keepFocusInStackIfPossible(mStackId) && isFocusable()) { 3173 // For freeform, docked, and pinned stacks we always keep the focus within the 3174 // stack as long as there is a running activity in the stack that we can adjust 3175 // focus to. 3176 mService.setFocusedActivityLocked(next, myReason); 3177 return; 3178 } else { 3179 final TaskRecord task = r.task; 3180 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 3181 final int taskToReturnTo = task.getTaskToReturnTo(); 3182 3183 // For non-fullscreen stack, we want to move the focus to the next visible 3184 // stack to prevent the home screen from moving to the top and obscuring 3185 // other visible stacks. 3186 if (!mFullscreen 3187 && adjustFocusToNextFocusableStackLocked(taskToReturnTo, myReason)) { 3188 return; 3189 } 3190 // Move the home stack to the top if this stack is fullscreen or there is no 3191 // other visible stack. 3192 if (mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, myReason)) { 3193 // Activity focus was already adjusted. Nothing else to do... 3194 return; 3195 } 3196 } 3197 } 3198 } 3199 3200 mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked(), myReason); 3201 } 3202 3203 private boolean adjustFocusToNextFocusableStackLocked(int taskToReturnTo, String reason) { 3204 final ActivityStack stack = getNextFocusableStackLocked(); 3205 final String myReason = reason + " adjustFocusToNextFocusableStack"; 3206 if (stack == null) { 3207 return false; 3208 } 3209 3210 final ActivityRecord top = stack.topRunningActivityLocked(); 3211 3212 if (stack.isHomeStack() && (top == null || !top.visible)) { 3213 // If we will be focusing on the home stack next and its current top activity isn't 3214 // visible, then use the task return to value to determine the home task to display next. 3215 return mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, reason); 3216 } 3217 return mService.setFocusedActivityLocked(top, myReason); 3218 } 3219 3220 final void stopActivityLocked(ActivityRecord r) { 3221 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r); 3222 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 3223 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 3224 if (!r.finishing) { 3225 if (!mService.isSleepingLocked()) { 3226 if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r); 3227 if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 3228 "stop-no-history", false)) { 3229 // Activity was finished, no need to continue trying to schedule stop. 3230 adjustFocusedActivityLocked(r, "stopActivityFinished"); 3231 r.resumeKeyDispatchingLocked(); 3232 return; 3233 } 3234 } else { 3235 if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r 3236 + " on stop because we're just sleeping"); 3237 } 3238 } 3239 } 3240 3241 if (r.app != null && r.app.thread != null) { 3242 adjustFocusedActivityLocked(r, "stopActivity"); 3243 r.resumeKeyDispatchingLocked(); 3244 try { 3245 r.stopped = false; 3246 if (DEBUG_STATES) Slog.v(TAG_STATES, 3247 "Moving to STOPPING: " + r + " (stop requested)"); 3248 r.state = ActivityState.STOPPING; 3249 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 3250 "Stopping visible=" + r.visible + " for " + r); 3251 if (!r.visible) { 3252 mWindowManager.setAppVisibility(r.appToken, false); 3253 } 3254 EventLogTags.writeAmStopActivity( 3255 r.userId, System.identityHashCode(r), r.shortComponentName); 3256 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 3257 if (mService.isSleepingOrShuttingDownLocked()) { 3258 r.setSleeping(true); 3259 } 3260 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 3261 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 3262 } catch (Exception e) { 3263 // Maybe just ignore exceptions here... if the process 3264 // has crashed, our death notification will clean things 3265 // up. 3266 Slog.w(TAG, "Exception thrown during pause", e); 3267 // Just in case, assume it to be stopped. 3268 r.stopped = true; 3269 if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r); 3270 r.state = ActivityState.STOPPED; 3271 if (r.deferRelaunchUntilPaused) { 3272 destroyActivityLocked(r, true, "stop-except"); 3273 } 3274 } 3275 } 3276 } 3277 3278 /** 3279 * @return Returns true if the activity is being finished, false if for 3280 * some reason it is being left as-is. 3281 */ 3282 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 3283 Intent resultData, String reason, boolean oomAdj) { 3284 ActivityRecord r = isInStackLocked(token); 3285 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES, 3286 "Finishing activity token=" + token + " r=" 3287 + ", result=" + resultCode + ", data=" + resultData 3288 + ", reason=" + reason); 3289 if (r == null) { 3290 return false; 3291 } 3292 3293 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 3294 return true; 3295 } 3296 3297 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 3298 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3299 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3300 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3301 ActivityRecord r = activities.get(activityNdx); 3302 if (r.resultTo == self && r.requestCode == requestCode) { 3303 if ((r.resultWho == null && resultWho == null) || 3304 (r.resultWho != null && r.resultWho.equals(resultWho))) { 3305 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 3306 false); 3307 } 3308 } 3309 } 3310 } 3311 mService.updateOomAdjLocked(); 3312 } 3313 3314 final TaskRecord finishTopRunningActivityLocked(ProcessRecord app, String reason) { 3315 ActivityRecord r = topRunningActivityLocked(); 3316 TaskRecord finishedTask = null; 3317 if (r == null || r.app != app) { 3318 return null; 3319 } 3320 Slog.w(TAG, " Force finishing activity " 3321 + r.intent.getComponent().flattenToShortString()); 3322 int taskNdx = mTaskHistory.indexOf(r.task); 3323 int activityNdx = r.task.mActivities.indexOf(r); 3324 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3325 finishedTask = r.task; 3326 // Also terminate any activities below it that aren't yet 3327 // stopped, to avoid a situation where one will get 3328 // re-start our crashing activity once it gets resumed again. 3329 --activityNdx; 3330 if (activityNdx < 0) { 3331 do { 3332 --taskNdx; 3333 if (taskNdx < 0) { 3334 break; 3335 } 3336 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 3337 } while (activityNdx < 0); 3338 } 3339 if (activityNdx >= 0) { 3340 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 3341 if (r.state == ActivityState.RESUMED 3342 || r.state == ActivityState.PAUSING 3343 || r.state == ActivityState.PAUSED) { 3344 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 3345 Slog.w(TAG, " Force finishing activity " 3346 + r.intent.getComponent().flattenToShortString()); 3347 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3348 } 3349 } 3350 } 3351 return finishedTask; 3352 } 3353 3354 final void finishVoiceTask(IVoiceInteractionSession session) { 3355 IBinder sessionBinder = session.asBinder(); 3356 boolean didOne = false; 3357 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3358 TaskRecord tr = mTaskHistory.get(taskNdx); 3359 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 3360 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3361 ActivityRecord r = tr.mActivities.get(activityNdx); 3362 if (!r.finishing) { 3363 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 3364 false); 3365 didOne = true; 3366 } 3367 } 3368 } else { 3369 // Check if any of the activities are using voice 3370 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3371 ActivityRecord r = tr.mActivities.get(activityNdx); 3372 if (r.voiceSession != null 3373 && r.voiceSession.asBinder() == sessionBinder) { 3374 // Inform of cancellation 3375 r.clearVoiceSessionLocked(); 3376 try { 3377 r.app.thread.scheduleLocalVoiceInteractionStarted((IBinder) r.appToken, 3378 null); 3379 } catch (RemoteException re) { 3380 // Ok 3381 } 3382 mService.finishRunningVoiceLocked(); 3383 break; 3384 } 3385 } 3386 } 3387 } 3388 3389 if (didOne) { 3390 mService.updateOomAdjLocked(); 3391 } 3392 } 3393 3394 final boolean finishActivityAffinityLocked(ActivityRecord r) { 3395 ArrayList<ActivityRecord> activities = r.task.mActivities; 3396 for (int index = activities.indexOf(r); index >= 0; --index) { 3397 ActivityRecord cur = activities.get(index); 3398 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 3399 break; 3400 } 3401 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 3402 } 3403 return true; 3404 } 3405 3406 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 3407 // send the result 3408 ActivityRecord resultTo = r.resultTo; 3409 if (resultTo != null) { 3410 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo 3411 + " who=" + r.resultWho + " req=" + r.requestCode 3412 + " res=" + resultCode + " data=" + resultData); 3413 if (resultTo.userId != r.userId) { 3414 if (resultData != null) { 3415 resultData.prepareToLeaveUser(r.userId); 3416 } 3417 } 3418 if (r.info.applicationInfo.uid > 0) { 3419 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 3420 resultTo.packageName, resultData, 3421 resultTo.getUriPermissionsLocked(), resultTo.userId); 3422 } 3423 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 3424 resultData); 3425 r.resultTo = null; 3426 } 3427 else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r); 3428 3429 // Make sure this HistoryRecord is not holding on to other resources, 3430 // because clients have remote IPC references to this object so we 3431 // can't assume that will go away and want to avoid circular IPC refs. 3432 r.results = null; 3433 r.pendingResults = null; 3434 r.newIntents = null; 3435 r.icicle = null; 3436 } 3437 3438 /** 3439 * @return Returns true if this activity has been removed from the history 3440 * list, or false if it is still in the list and will be removed later. 3441 */ 3442 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 3443 String reason, boolean oomAdj) { 3444 if (r.finishing) { 3445 Slog.w(TAG, "Duplicate finish request for " + r); 3446 return false; 3447 } 3448 3449 r.makeFinishingLocked(); 3450 final TaskRecord task = r.task; 3451 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3452 r.userId, System.identityHashCode(r), 3453 task.taskId, r.shortComponentName, reason); 3454 final ArrayList<ActivityRecord> activities = task.mActivities; 3455 final int index = activities.indexOf(r); 3456 if (index < (activities.size() - 1)) { 3457 task.setFrontOfTask(); 3458 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 3459 // If the caller asked that this activity (and all above it) 3460 // be cleared when the task is reset, don't lose that information, 3461 // but propagate it up to the next activity. 3462 ActivityRecord next = activities.get(index+1); 3463 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 3464 } 3465 } 3466 3467 r.pauseKeyDispatchingLocked(); 3468 3469 adjustFocusedActivityLocked(r, "finishActivity"); 3470 3471 finishActivityResultsLocked(r, resultCode, resultData); 3472 3473 final boolean endTask = index <= 0; 3474 final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE; 3475 if (mResumedActivity == r) { 3476 3477 if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 3478 "Prepare close transition: finishing " + r); 3479 mWindowManager.prepareAppTransition(transit, false); 3480 3481 // Tell window manager to prepare for this one to be removed. 3482 mWindowManager.setAppVisibility(r.appToken, false); 3483 3484 if (mPausingActivity == null) { 3485 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r); 3486 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 3487 "finish() => pause with userLeaving=false"); 3488 startPausingLocked(false, false, false, false); 3489 } 3490 3491 if (endTask) { 3492 mStackSupervisor.removeLockedTaskLocked(task); 3493 } 3494 } else if (r.state != ActivityState.PAUSING) { 3495 // If the activity is PAUSING, we will complete the finish once 3496 // it is done pausing; else we can just directly finish it here. 3497 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r); 3498 if (r.visible) { 3499 mWindowManager.prepareAppTransition(transit, false); 3500 mWindowManager.setAppVisibility(r.appToken, false); 3501 mWindowManager.executeAppTransition(); 3502 if (!mStackSupervisor.mWaitingVisibleActivities.contains(r)) { 3503 mStackSupervisor.mWaitingVisibleActivities.add(r); 3504 } 3505 } 3506 return finishCurrentActivityLocked(r, (r.visible || r.nowVisible) ? 3507 FINISH_AFTER_VISIBLE : FINISH_AFTER_PAUSE, oomAdj) == null; 3508 } else { 3509 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r); 3510 } 3511 3512 return false; 3513 } 3514 3515 static final int FINISH_IMMEDIATELY = 0; 3516 static final int FINISH_AFTER_PAUSE = 1; 3517 static final int FINISH_AFTER_VISIBLE = 2; 3518 3519 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 3520 // First things first: if this activity is currently visible, 3521 // and the resumed activity is not yet visible, then hold off on 3522 // finishing until the resumed one becomes visible. 3523 3524 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 3525 3526 if (mode == FINISH_AFTER_VISIBLE && (r.visible || r.nowVisible) 3527 && next != null && !next.nowVisible) { 3528 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 3529 addToStopping(r, false /* immediate */); 3530 } 3531 if (DEBUG_STATES) Slog.v(TAG_STATES, 3532 "Moving to STOPPING: "+ r + " (finish requested)"); 3533 r.state = ActivityState.STOPPING; 3534 if (oomAdj) { 3535 mService.updateOomAdjLocked(); 3536 } 3537 return r; 3538 } 3539 3540 // make sure the record is cleaned out of other places. 3541 mStackSupervisor.mStoppingActivities.remove(r); 3542 mStackSupervisor.mGoingToSleepActivities.remove(r); 3543 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3544 if (mResumedActivity == r) { 3545 mResumedActivity = null; 3546 } 3547 final ActivityState prevState = r.state; 3548 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r); 3549 r.state = ActivityState.FINISHING; 3550 3551 if (mode == FINISH_IMMEDIATELY 3552 || (prevState == ActivityState.PAUSED 3553 && (mode == FINISH_AFTER_PAUSE || mStackId == PINNED_STACK_ID)) 3554 || prevState == ActivityState.STOPPED 3555 || prevState == ActivityState.INITIALIZING) { 3556 r.makeFinishingLocked(); 3557 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 3558 if (activityRemoved) { 3559 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3560 } 3561 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, 3562 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 3563 " destroy returned removed=" + activityRemoved); 3564 return activityRemoved ? null : r; 3565 } 3566 3567 // Need to go through the full pause cycle to get this 3568 // activity into the stopped state and then finish it. 3569 if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); 3570 mStackSupervisor.mFinishingActivities.add(r); 3571 r.resumeKeyDispatchingLocked(); 3572 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3573 return r; 3574 } 3575 3576 void finishAllActivitiesLocked(boolean immediately) { 3577 boolean noActivitiesInStack = true; 3578 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3579 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3580 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3581 final ActivityRecord r = activities.get(activityNdx); 3582 noActivitiesInStack = false; 3583 if (r.finishing && !immediately) { 3584 continue; 3585 } 3586 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 3587 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3588 } 3589 } 3590 if (noActivitiesInStack) { 3591 mActivityContainer.onTaskListEmptyLocked(); 3592 } 3593 } 3594 3595 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 3596 // Basic case: for simple app-centric recents, we need to recreate 3597 // the task if the affinity has changed. 3598 if (srec == null || srec.task.affinity == null || 3599 !srec.task.affinity.equals(destAffinity)) { 3600 return true; 3601 } 3602 // Document-centric case: an app may be split in to multiple documents; 3603 // they need to re-create their task if this current activity is the root 3604 // of a document, unless simply finishing it will return them to the the 3605 // correct app behind. 3606 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 3607 && srec.task.getBaseIntent().isDocument()) { 3608 // Okay, this activity is at the root of its task. What to do, what to do... 3609 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 3610 // Finishing won't return to an application, so we need to recreate. 3611 return true; 3612 } 3613 // We now need to get the task below it to determine what to do. 3614 int taskIdx = mTaskHistory.indexOf(srec.task); 3615 if (taskIdx <= 0) { 3616 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 3617 return false; 3618 } 3619 if (taskIdx == 0) { 3620 // At the bottom of the stack, nothing to go back to. 3621 return true; 3622 } 3623 TaskRecord prevTask = mTaskHistory.get(taskIdx); 3624 if (!srec.task.affinity.equals(prevTask.affinity)) { 3625 // These are different apps, so need to recreate. 3626 return true; 3627 } 3628 } 3629 return false; 3630 } 3631 3632 final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, 3633 Intent resultData) { 3634 final TaskRecord task = srec.task; 3635 final ArrayList<ActivityRecord> activities = task.mActivities; 3636 final int start = activities.indexOf(srec); 3637 if (!mTaskHistory.contains(task) || (start < 0)) { 3638 return false; 3639 } 3640 int finishTo = start - 1; 3641 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 3642 boolean foundParentInTask = false; 3643 final ComponentName dest = destIntent.getComponent(); 3644 if (start > 0 && dest != null) { 3645 for (int i = finishTo; i >= 0; i--) { 3646 ActivityRecord r = activities.get(i); 3647 if (r.info.packageName.equals(dest.getPackageName()) && 3648 r.info.name.equals(dest.getClassName())) { 3649 finishTo = i; 3650 parent = r; 3651 foundParentInTask = true; 3652 break; 3653 } 3654 } 3655 } 3656 3657 IActivityController controller = mService.mController; 3658 if (controller != null) { 3659 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 3660 if (next != null) { 3661 // ask watcher if this is allowed 3662 boolean resumeOK = true; 3663 try { 3664 resumeOK = controller.activityResuming(next.packageName); 3665 } catch (RemoteException e) { 3666 mService.mController = null; 3667 Watchdog.getInstance().setActivityController(null); 3668 } 3669 3670 if (!resumeOK) { 3671 return false; 3672 } 3673 } 3674 } 3675 final long origId = Binder.clearCallingIdentity(); 3676 for (int i = start; i > finishTo; i--) { 3677 ActivityRecord r = activities.get(i); 3678 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 3679 // Only return the supplied result for the first activity finished 3680 resultCode = Activity.RESULT_CANCELED; 3681 resultData = null; 3682 } 3683 3684 if (parent != null && foundParentInTask) { 3685 final int parentLaunchMode = parent.info.launchMode; 3686 final int destIntentFlags = destIntent.getFlags(); 3687 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 3688 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 3689 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 3690 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 3691 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 3692 srec.packageName); 3693 } else { 3694 try { 3695 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 3696 destIntent.getComponent(), 0, srec.userId); 3697 int res = mService.mActivityStarter.startActivityLocked(srec.app.thread, 3698 destIntent, null /*ephemeralIntent*/, null, aInfo, null /*rInfo*/, null, 3699 null, parent.appToken, null, 0, -1, parent.launchedFromUid, 3700 parent.launchedFromPackage, -1, parent.launchedFromUid, 0, null, 3701 false, true, null, null, null); 3702 foundParentInTask = res == ActivityManager.START_SUCCESS; 3703 } catch (RemoteException e) { 3704 foundParentInTask = false; 3705 } 3706 requestFinishActivityLocked(parent.appToken, resultCode, 3707 resultData, "navigate-top", true); 3708 } 3709 } 3710 Binder.restoreCallingIdentity(origId); 3711 return foundParentInTask; 3712 } 3713 /** 3714 * Perform the common clean-up of an activity record. This is called both 3715 * as part of destroyActivityLocked() (when destroying the client-side 3716 * representation) and cleaning things up as a result of its hosting 3717 * processing going away, in which case there is no remaining client-side 3718 * state to destroy so only the cleanup here is needed. 3719 * 3720 * Note: Call before #removeActivityFromHistoryLocked. 3721 */ 3722 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 3723 boolean setState) { 3724 if (mResumedActivity == r) { 3725 mResumedActivity = null; 3726 } 3727 if (mPausingActivity == r) { 3728 mPausingActivity = null; 3729 } 3730 mService.resetFocusedActivityIfNeededLocked(r); 3731 3732 r.deferRelaunchUntilPaused = false; 3733 r.frozenBeforeDestroy = false; 3734 3735 if (setState) { 3736 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)"); 3737 r.state = ActivityState.DESTROYED; 3738 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r); 3739 r.app = null; 3740 } 3741 3742 // Make sure this record is no longer in the pending finishes list. 3743 // This could happen, for example, if we are trimming activities 3744 // down to the max limit while they are still waiting to finish. 3745 mStackSupervisor.mFinishingActivities.remove(r); 3746 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3747 3748 // Remove any pending results. 3749 if (r.finishing && r.pendingResults != null) { 3750 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3751 PendingIntentRecord rec = apr.get(); 3752 if (rec != null) { 3753 mService.cancelIntentSenderLocked(rec, false); 3754 } 3755 } 3756 r.pendingResults = null; 3757 } 3758 3759 if (cleanServices) { 3760 cleanUpActivityServicesLocked(r); 3761 } 3762 3763 // Get rid of any pending idle timeouts. 3764 removeTimeoutsForActivityLocked(r); 3765 if (getVisibleBehindActivity() == r) { 3766 mStackSupervisor.requestVisibleBehindLocked(r, false); 3767 } 3768 } 3769 3770 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3771 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3772 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3773 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3774 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3775 r.finishLaunchTickingLocked(); 3776 } 3777 3778 private void removeActivityFromHistoryLocked( 3779 ActivityRecord r, TaskRecord oldTop, String reason) { 3780 mStackSupervisor.removeChildActivityContainers(r); 3781 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3782 r.makeFinishingLocked(); 3783 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3784 "Removing activity " + r + " from stack callers=" + Debug.getCallers(5)); 3785 3786 r.takeFromHistory(); 3787 removeTimeoutsForActivityLocked(r); 3788 if (DEBUG_STATES) Slog.v(TAG_STATES, 3789 "Moving to DESTROYED: " + r + " (removed from history)"); 3790 r.state = ActivityState.DESTROYED; 3791 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r); 3792 r.app = null; 3793 mWindowManager.removeAppToken(r.appToken); 3794 if (VALIDATE_TOKENS) { 3795 validateAppTokensLocked(); 3796 } 3797 final TaskRecord task = r.task; 3798 final TaskRecord topTask = oldTop != null ? oldTop : topTask(); 3799 if (task != null && task.removeActivity(r)) { 3800 if (DEBUG_STACK) Slog.i(TAG_STACK, 3801 "removeActivityFromHistoryLocked: last activity removed from " + this); 3802 if (mStackSupervisor.isFocusedStack(this) && task == topTask && 3803 task.isOverHomeStack()) { 3804 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); 3805 } 3806 removeTask(task, reason); 3807 } 3808 cleanUpActivityServicesLocked(r); 3809 r.removeUriPermissionsLocked(); 3810 } 3811 3812 /** 3813 * Perform clean-up of service connections in an activity record. 3814 */ 3815 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3816 // Throw away any services that have been bound by this activity. 3817 if (r.connections != null) { 3818 Iterator<ConnectionRecord> it = r.connections.iterator(); 3819 while (it.hasNext()) { 3820 ConnectionRecord c = it.next(); 3821 mService.mServices.removeConnectionLocked(c, null, r); 3822 } 3823 r.connections = null; 3824 } 3825 } 3826 3827 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3828 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3829 msg.obj = new ScheduleDestroyArgs(owner, reason); 3830 mHandler.sendMessage(msg); 3831 } 3832 3833 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3834 boolean lastIsOpaque = false; 3835 boolean activityRemoved = false; 3836 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3837 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3838 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3839 final ActivityRecord r = activities.get(activityNdx); 3840 if (r.finishing) { 3841 continue; 3842 } 3843 if (r.fullscreen) { 3844 lastIsOpaque = true; 3845 } 3846 if (owner != null && r.app != owner) { 3847 continue; 3848 } 3849 if (!lastIsOpaque) { 3850 continue; 3851 } 3852 if (r.isDestroyable()) { 3853 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state 3854 + " resumed=" + mResumedActivity 3855 + " pausing=" + mPausingActivity + " for reason " + reason); 3856 if (destroyActivityLocked(r, true, reason)) { 3857 activityRemoved = true; 3858 } 3859 } 3860 } 3861 } 3862 if (activityRemoved) { 3863 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3864 } 3865 } 3866 3867 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3868 if (r.isDestroyable()) { 3869 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 3870 "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity 3871 + " pausing=" + mPausingActivity + " for reason " + reason); 3872 return destroyActivityLocked(r, true, reason); 3873 } 3874 return false; 3875 } 3876 3877 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3878 String reason) { 3879 // Iterate over tasks starting at the back (oldest) first. 3880 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app); 3881 int maxTasks = tasks.size() / 4; 3882 if (maxTasks < 1) { 3883 maxTasks = 1; 3884 } 3885 int numReleased = 0; 3886 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3887 final TaskRecord task = mTaskHistory.get(taskNdx); 3888 if (!tasks.contains(task)) { 3889 continue; 3890 } 3891 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task); 3892 int curNum = 0; 3893 final ArrayList<ActivityRecord> activities = task.mActivities; 3894 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3895 final ActivityRecord activity = activities.get(actNdx); 3896 if (activity.app == app && activity.isDestroyable()) { 3897 if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity 3898 + " in state " + activity.state + " resumed=" + mResumedActivity 3899 + " pausing=" + mPausingActivity + " for reason " + reason); 3900 destroyActivityLocked(activity, true, reason); 3901 if (activities.get(actNdx) != activity) { 3902 // Was removed from list, back up so we don't miss the next one. 3903 actNdx--; 3904 } 3905 curNum++; 3906 } 3907 } 3908 if (curNum > 0) { 3909 numReleased += curNum; 3910 maxTasks--; 3911 if (mTaskHistory.get(taskNdx) != task) { 3912 // The entire task got removed, back up so we don't miss the next one. 3913 taskNdx--; 3914 } 3915 } 3916 } 3917 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, 3918 "Done releasing: did " + numReleased + " activities"); 3919 return numReleased; 3920 } 3921 3922 /** 3923 * Destroy the current CLIENT SIDE instance of an activity. This may be 3924 * called both when actually finishing an activity, or when performing 3925 * a configuration switch where we destroy the current client-side object 3926 * but then create a new client-side object for this same HistoryRecord. 3927 */ 3928 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3929 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH, 3930 "Removing activity from " + reason + ": token=" + r 3931 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3932 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3933 r.userId, System.identityHashCode(r), 3934 r.task.taskId, r.shortComponentName, reason); 3935 3936 boolean removedFromHistory = false; 3937 3938 // If the activity is finishing, it's no longer considered in topRunningActivityLocked, 3939 // and cleanUpActivityLocked() may change focus to another activity (or task). 3940 // Get the current top task now, as removeActivityFromHistoryLocked() below need this 3941 // to decide whether to return to home stack after removal. 3942 final TaskRecord topTask = topTask(); 3943 3944 cleanUpActivityLocked(r, false, false); 3945 3946 final boolean hadApp = r.app != null; 3947 3948 if (hadApp) { 3949 if (removeFromApp) { 3950 r.app.activities.remove(r); 3951 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3952 mService.mHeavyWeightProcess = null; 3953 mService.mHandler.sendEmptyMessage( 3954 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3955 } 3956 if (r.app.activities.isEmpty()) { 3957 // Update any services we are bound to that might care about whether 3958 // their client may have activities. 3959 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3960 // No longer have activities, so update LRU list and oom adj. 3961 mService.updateLruProcessLocked(r.app, false, null); 3962 mService.updateOomAdjLocked(); 3963 } 3964 } 3965 3966 boolean skipDestroy = false; 3967 3968 try { 3969 if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r); 3970 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3971 r.configChangeFlags); 3972 } catch (Exception e) { 3973 // We can just ignore exceptions here... if the process 3974 // has crashed, our death notification will clean things 3975 // up. 3976 //Slog.w(TAG, "Exception thrown during finish", e); 3977 if (r.finishing) { 3978 removeActivityFromHistoryLocked( 3979 r, topTask, reason + " exceptionInScheduleDestroy"); 3980 removedFromHistory = true; 3981 skipDestroy = true; 3982 } 3983 } 3984 3985 r.nowVisible = false; 3986 3987 // If the activity is finishing, we need to wait on removing it 3988 // from the list to give it a chance to do its cleanup. During 3989 // that time it may make calls back with its token so we need to 3990 // be able to find it on the list and so we don't want to remove 3991 // it from the list yet. Otherwise, we can just immediately put 3992 // it in the destroyed state since we are not removing it from the 3993 // list. 3994 if (r.finishing && !skipDestroy) { 3995 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r 3996 + " (destroy requested)"); 3997 r.state = ActivityState.DESTROYING; 3998 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3999 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 4000 } else { 4001 if (DEBUG_STATES) Slog.v(TAG_STATES, 4002 "Moving to DESTROYED: " + r + " (destroy skipped)"); 4003 r.state = ActivityState.DESTROYED; 4004 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 4005 r.app = null; 4006 } 4007 } else { 4008 // remove this record from the history. 4009 if (r.finishing) { 4010 removeActivityFromHistoryLocked(r, topTask, reason + " hadNoApp"); 4011 removedFromHistory = true; 4012 } else { 4013 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)"); 4014 r.state = ActivityState.DESTROYED; 4015 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 4016 r.app = null; 4017 } 4018 } 4019 4020 r.configChangeFlags = 0; 4021 4022 if (!mLRUActivities.remove(r) && hadApp) { 4023 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 4024 } 4025 4026 return removedFromHistory; 4027 } 4028 4029 final void activityDestroyedLocked(IBinder token, String reason) { 4030 final long origId = Binder.clearCallingIdentity(); 4031 try { 4032 ActivityRecord r = ActivityRecord.forTokenLocked(token); 4033 if (r != null) { 4034 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 4035 } 4036 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r); 4037 4038 if (isInStackLocked(r) != null) { 4039 if (r.state == ActivityState.DESTROYING) { 4040 cleanUpActivityLocked(r, true, false); 4041 removeActivityFromHistoryLocked(r, null, reason); 4042 } 4043 } 4044 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4045 } finally { 4046 Binder.restoreCallingIdentity(origId); 4047 } 4048 } 4049 4050 void releaseBackgroundResources(ActivityRecord r) { 4051 if (hasVisibleBehindActivity() && 4052 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 4053 if (r == topRunningActivityLocked() 4054 && getStackVisibilityLocked(null) == STACK_VISIBLE) { 4055 // Don't release the top activity if it has requested to run behind the next 4056 // activity and the stack is currently visible. 4057 return; 4058 } 4059 if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" + 4060 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 4061 " thread=" + r.app.thread); 4062 if (r != null && r.app != null && r.app.thread != null) { 4063 try { 4064 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 4065 } catch (RemoteException e) { 4066 } 4067 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 4068 } else { 4069 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 4070 backgroundResourcesReleased(); 4071 } 4072 } 4073 } 4074 4075 final void backgroundResourcesReleased() { 4076 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 4077 final ActivityRecord r = getVisibleBehindActivity(); 4078 if (r != null) { 4079 mStackSupervisor.mStoppingActivities.add(r); 4080 setVisibleBehindActivity(null); 4081 mStackSupervisor.scheduleIdleTimeoutLocked(null); 4082 } 4083 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4084 } 4085 4086 boolean hasVisibleBehindActivity() { 4087 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 4088 } 4089 4090 void setVisibleBehindActivity(ActivityRecord r) { 4091 if (isAttached()) { 4092 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 4093 } 4094 } 4095 4096 ActivityRecord getVisibleBehindActivity() { 4097 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 4098 } 4099 4100 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 4101 ProcessRecord app, String listName) { 4102 int i = list.size(); 4103 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4104 "Removing app " + app + " from list " + listName + " with " + i + " entries"); 4105 while (i > 0) { 4106 i--; 4107 ActivityRecord r = list.get(i); 4108 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); 4109 if (r.app == app) { 4110 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); 4111 list.remove(i); 4112 removeTimeoutsForActivityLocked(r); 4113 } 4114 } 4115 } 4116 4117 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 4118 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 4119 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 4120 "mStoppingActivities"); 4121 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 4122 "mGoingToSleepActivities"); 4123 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 4124 "mWaitingVisibleActivities"); 4125 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 4126 "mFinishingActivities"); 4127 4128 boolean hasVisibleActivities = false; 4129 4130 // Clean out the history list. 4131 int i = numActivities(); 4132 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4133 "Removing app " + app + " from history with " + i + " entries"); 4134 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4135 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4136 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4137 final ActivityRecord r = activities.get(activityNdx); 4138 --i; 4139 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4140 "Record #" + i + " " + r + ": app=" + r.app); 4141 if (r.app == app) { 4142 if (r.visible) { 4143 hasVisibleActivities = true; 4144 } 4145 final boolean remove; 4146 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 4147 // Don't currently have state for the activity, or 4148 // it is finishing -- always remove it. 4149 remove = true; 4150 } else if (!r.visible && r.launchCount > 2 && 4151 r.lastLaunchTime > (SystemClock.uptimeMillis() - 60000)) { 4152 // We have launched this activity too many times since it was 4153 // able to run, so give up and remove it. 4154 // (Note if the activity is visible, we don't remove the record. 4155 // We leave the dead window on the screen but the process will 4156 // not be restarted unless user explicitly tap on it.) 4157 remove = true; 4158 } else { 4159 // The process may be gone, but the activity lives on! 4160 remove = false; 4161 } 4162 if (remove) { 4163 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE, 4164 "Removing activity " + r + " from stack at " + i 4165 + ": haveState=" + r.haveState 4166 + " stateNotNeeded=" + r.stateNotNeeded 4167 + " finishing=" + r.finishing 4168 + " state=" + r.state + " callers=" + Debug.getCallers(5)); 4169 if (!r.finishing) { 4170 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 4171 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 4172 r.userId, System.identityHashCode(r), 4173 r.task.taskId, r.shortComponentName, 4174 "proc died without state saved"); 4175 if (r.state == ActivityState.RESUMED) { 4176 mService.updateUsageStats(r, false); 4177 } 4178 } 4179 } else { 4180 // We have the current state for this activity, so 4181 // it can be restarted later when needed. 4182 if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null"); 4183 if (DEBUG_APP) Slog.v(TAG_APP, 4184 "Clearing app during removeHistory for activity " + r); 4185 r.app = null; 4186 // Set nowVisible to previous visible state. If the app was visible while 4187 // it died, we leave the dead window on screen so it's basically visible. 4188 // This is needed when user later tap on the dead window, we need to stop 4189 // other apps when user transfers focus to the restarted activity. 4190 r.nowVisible = r.visible; 4191 if (!r.haveState) { 4192 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 4193 "App died, clearing saved state of " + r); 4194 r.icicle = null; 4195 } 4196 } 4197 cleanUpActivityLocked(r, true, true); 4198 if (remove) { 4199 removeActivityFromHistoryLocked(r, null, "appDied"); 4200 } 4201 } 4202 } 4203 } 4204 4205 return hasVisibleActivities; 4206 } 4207 4208 final void updateTransitLocked(int transit, ActivityOptions options) { 4209 if (options != null) { 4210 ActivityRecord r = topRunningActivityLocked(); 4211 if (r != null && r.state != ActivityState.RESUMED) { 4212 r.updateOptionsLocked(options); 4213 } else { 4214 ActivityOptions.abort(options); 4215 } 4216 } 4217 mWindowManager.prepareAppTransition(transit, false); 4218 } 4219 4220 void updateTaskMovement(TaskRecord task, boolean toFront) { 4221 if (task.isPersistable) { 4222 task.mLastTimeMoved = System.currentTimeMillis(); 4223 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 4224 // recently will be most negative, tasks sent to the bottom before that will be less 4225 // negative. Similarly for recent tasks moved to the top which will be most positive. 4226 if (!toFront) { 4227 task.mLastTimeMoved *= -1; 4228 } 4229 } 4230 mStackSupervisor.invalidateTaskLayers(); 4231 } 4232 4233 void moveHomeStackTaskToTop(int homeStackTaskType) { 4234 final int top = mTaskHistory.size() - 1; 4235 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 4236 final TaskRecord task = mTaskHistory.get(taskNdx); 4237 if (task.taskType == homeStackTaskType) { 4238 if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK, 4239 "moveHomeStackTaskToTop: moving " + task); 4240 mTaskHistory.remove(taskNdx); 4241 mTaskHistory.add(top, task); 4242 updateTaskMovement(task, true); 4243 return; 4244 } 4245 } 4246 } 4247 4248 final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, ActivityOptions options, 4249 AppTimeTracker timeTracker, String reason) { 4250 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr); 4251 4252 final int numTasks = mTaskHistory.size(); 4253 final int index = mTaskHistory.indexOf(tr); 4254 if (numTasks == 0 || index < 0) { 4255 // nothing to do! 4256 if (noAnimation) { 4257 ActivityOptions.abort(options); 4258 } else { 4259 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4260 } 4261 return; 4262 } 4263 4264 if (timeTracker != null) { 4265 // The caller wants a time tracker associated with this task. 4266 for (int i = tr.mActivities.size() - 1; i >= 0; i--) { 4267 tr.mActivities.get(i).appTimeTracker = timeTracker; 4268 } 4269 } 4270 4271 // Shift all activities with this task up to the top 4272 // of the stack, keeping them in the same internal order. 4273 insertTaskAtTop(tr, null); 4274 4275 // Don't refocus if invisible to current user 4276 ActivityRecord top = tr.getTopActivity(); 4277 if (!okToShowLocked(top)) { 4278 addRecentActivityLocked(top); 4279 ActivityOptions.abort(options); 4280 return; 4281 } 4282 4283 // Set focus to the top running activity of this stack. 4284 ActivityRecord r = topRunningActivityLocked(); 4285 mService.setFocusedActivityLocked(r, reason); 4286 4287 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr); 4288 if (noAnimation) { 4289 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 4290 if (r != null) { 4291 mNoAnimActivities.add(r); 4292 } 4293 ActivityOptions.abort(options); 4294 } else { 4295 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4296 } 4297 4298 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4299 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 4300 4301 if (VALIDATE_TOKENS) { 4302 validateAppTokensLocked(); 4303 } 4304 } 4305 4306 /** 4307 * Worker method for rearranging history stack. Implements the function of moving all 4308 * activities for a specific task (gathering them if disjoint) into a single group at the 4309 * bottom of the stack. 4310 * 4311 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 4312 * to premeptively cancel the move. 4313 * 4314 * @param taskId The taskId to collect and move to the bottom. 4315 * @return Returns true if the move completed, false if not. 4316 */ 4317 final boolean moveTaskToBackLocked(int taskId) { 4318 final TaskRecord tr = taskForIdLocked(taskId); 4319 if (tr == null) { 4320 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 4321 return false; 4322 } 4323 4324 Slog.i(TAG, "moveTaskToBack: " + tr); 4325 mStackSupervisor.removeLockedTaskLocked(tr); 4326 4327 // If we have a watcher, preflight the move before committing to it. First check 4328 // for *other* available tasks, but if none are available, then try again allowing the 4329 // current task to be selected. 4330 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 4331 ActivityRecord next = topRunningActivityLocked(null, taskId); 4332 if (next == null) { 4333 next = topRunningActivityLocked(null, 0); 4334 } 4335 if (next != null) { 4336 // ask watcher if this is allowed 4337 boolean moveOK = true; 4338 try { 4339 moveOK = mService.mController.activityResuming(next.packageName); 4340 } catch (RemoteException e) { 4341 mService.mController = null; 4342 Watchdog.getInstance().setActivityController(null); 4343 } 4344 if (!moveOK) { 4345 return false; 4346 } 4347 } 4348 } 4349 4350 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId); 4351 4352 if (mStackId == HOME_STACK_ID && topTask().isHomeTask()) { 4353 // For the case where we are moving the home task back and there is an activity visible 4354 // behind it on the fullscreen stack, we want to move the focus to the visible behind 4355 // activity to maintain order with what the user is seeing. 4356 final ActivityStack fullscreenStack = 4357 mStackSupervisor.getStack(FULLSCREEN_WORKSPACE_STACK_ID); 4358 if (fullscreenStack != null && fullscreenStack.hasVisibleBehindActivity()) { 4359 final ActivityRecord visibleBehind = fullscreenStack.getVisibleBehindActivity(); 4360 mService.setFocusedActivityLocked(visibleBehind, "moveTaskToBack"); 4361 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4362 return true; 4363 } 4364 } 4365 4366 boolean prevIsHome = false; 4367 4368 // If true, we should resume the home activity next if the task we are moving to the 4369 // back is over the home stack. We force to false if the task we are moving to back 4370 // is the home task and we don't want it resumed after moving to the back. 4371 final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack(); 4372 if (canGoHome) { 4373 final TaskRecord nextTask = getNextTask(tr); 4374 if (nextTask != null) { 4375 nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); 4376 } else { 4377 prevIsHome = true; 4378 } 4379 } 4380 mTaskHistory.remove(tr); 4381 mTaskHistory.add(0, tr); 4382 updateTaskMovement(tr, false); 4383 4384 // There is an assumption that moving a task to the back moves it behind the home activity. 4385 // We make sure here that some activity in the stack will launch home. 4386 int numTasks = mTaskHistory.size(); 4387 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 4388 final TaskRecord task = mTaskHistory.get(taskNdx); 4389 if (task.isOverHomeStack()) { 4390 break; 4391 } 4392 if (taskNdx == 1) { 4393 // Set the last task before tr to go to home. 4394 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4395 } 4396 } 4397 4398 mWindowManager.prepareAppTransition(TRANSIT_TASK_TO_BACK, false); 4399 mWindowManager.moveTaskToBottom(taskId); 4400 4401 if (VALIDATE_TOKENS) { 4402 validateAppTokensLocked(); 4403 } 4404 4405 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 4406 if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) { 4407 if (!mService.mBooting && !mService.mBooted) { 4408 // Not ready yet! 4409 return false; 4410 } 4411 final int taskToReturnTo = tr.getTaskToReturnTo(); 4412 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 4413 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); 4414 } 4415 4416 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4417 return true; 4418 } 4419 4420 static final void logStartActivity(int tag, ActivityRecord r, 4421 TaskRecord task) { 4422 final Uri data = r.intent.getData(); 4423 final String strData = data != null ? data.toSafeString() : null; 4424 4425 EventLog.writeEvent(tag, 4426 r.userId, System.identityHashCode(r), task.taskId, 4427 r.shortComponentName, r.intent.getAction(), 4428 r.intent.getType(), strData, r.intent.getFlags()); 4429 } 4430 4431 /** 4432 * Ensures all visible activities at or below the input activity have the right configuration. 4433 */ 4434 void ensureVisibleActivitiesConfigurationLocked(ActivityRecord start, boolean preserveWindow) { 4435 if (start == null || !start.visible) { 4436 return; 4437 } 4438 4439 final TaskRecord startTask = start.task; 4440 boolean behindFullscreen = false; 4441 boolean updatedConfig = false; 4442 4443 for (int taskIndex = mTaskHistory.indexOf(startTask); taskIndex >= 0; --taskIndex) { 4444 final TaskRecord task = mTaskHistory.get(taskIndex); 4445 final ArrayList<ActivityRecord> activities = task.mActivities; 4446 int activityIndex = 4447 (start.task == task) ? activities.indexOf(start) : activities.size() - 1; 4448 for (; activityIndex >= 0; --activityIndex) { 4449 final ActivityRecord r = activities.get(activityIndex); 4450 updatedConfig |= ensureActivityConfigurationLocked(r, 0, preserveWindow); 4451 if (r.fullscreen) { 4452 behindFullscreen = true; 4453 break; 4454 } 4455 } 4456 if (behindFullscreen) { 4457 break; 4458 } 4459 } 4460 if (updatedConfig) { 4461 // Ensure the resumed state of the focus activity if we updated the confiugaration of 4462 // any activity. 4463 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4464 } 4465 } 4466 4467 /** 4468 * Make sure the given activity matches the current configuration. Returns false if the activity 4469 * had to be destroyed. Returns true if the configuration is the same, or the activity will 4470 * remain running as-is for whatever reason. Ensures the HistoryRecord is updated with the 4471 * correct configuration and all other bookkeeping is handled. 4472 */ 4473 boolean ensureActivityConfigurationLocked( 4474 ActivityRecord r, int globalChanges, boolean preserveWindow) { 4475 if (mConfigWillChange) { 4476 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4477 "Skipping config check (will change): " + r); 4478 return true; 4479 } 4480 4481 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4482 "Ensuring correct configuration: " + r); 4483 4484 // Short circuit: if the two configurations are equal (the common case), then there is 4485 // nothing to do. 4486 final Configuration newConfig = mService.mConfiguration; 4487 r.task.sanitizeOverrideConfiguration(newConfig); 4488 final Configuration taskConfig = r.task.mOverrideConfig; 4489 if (r.configuration.equals(newConfig) 4490 && r.taskConfigOverride.equals(taskConfig) 4491 && !r.forceNewConfig) { 4492 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4493 "Configuration unchanged in " + r); 4494 return true; 4495 } 4496 4497 // We don't worry about activities that are finishing. 4498 if (r.finishing) { 4499 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4500 "Configuration doesn't matter in finishing " + r); 4501 r.stopFreezingScreenLocked(false); 4502 return true; 4503 } 4504 4505 // Okay we now are going to make this activity have the new config. 4506 // But then we need to figure out how it needs to deal with that. 4507 final Configuration oldConfig = r.configuration; 4508 final Configuration oldTaskOverride = r.taskConfigOverride; 4509 r.configuration = newConfig; 4510 r.taskConfigOverride = taskConfig; 4511 4512 int taskChanges = getTaskConfigurationChanges(r, taskConfig, oldTaskOverride); 4513 final int changes = oldConfig.diff(newConfig) | taskChanges; 4514 if (changes == 0 && !r.forceNewConfig) { 4515 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4516 "Configuration no differences in " + r); 4517 // There are no significant differences, so we won't relaunch but should still deliver 4518 // the new configuration to the client process. 4519 r.scheduleConfigurationChanged(taskConfig, true); 4520 return true; 4521 } 4522 4523 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4524 "Configuration changes for " + r + " ; taskChanges=" 4525 + Configuration.configurationDiffToString(taskChanges) + ", allChanges=" 4526 + Configuration.configurationDiffToString(changes)); 4527 4528 // If the activity isn't currently running, just leave the new 4529 // configuration and it will pick that up next time it starts. 4530 if (r.app == null || r.app.thread == null) { 4531 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4532 "Configuration doesn't matter not running " + r); 4533 r.stopFreezingScreenLocked(false); 4534 r.forceNewConfig = false; 4535 return true; 4536 } 4537 4538 // Figure out how to handle the changes between the configurations. 4539 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4540 "Checking to restart " + r.info.name + ": changed=0x" 4541 + Integer.toHexString(changes) + ", handles=0x" 4542 + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig 4543 + ", taskConfig=" + taskConfig); 4544 4545 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 4546 // Aha, the activity isn't handling the change, so DIE DIE DIE. 4547 r.configChangeFlags |= changes; 4548 r.startFreezingScreenLocked(r.app, globalChanges); 4549 r.forceNewConfig = false; 4550 preserveWindow &= isResizeOnlyChange(changes); 4551 if (r.app == null || r.app.thread == null) { 4552 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4553 "Config is destroying non-running " + r); 4554 destroyActivityLocked(r, true, "config"); 4555 } else if (r.state == ActivityState.PAUSING) { 4556 // A little annoying: we are waiting for this activity to finish pausing. Let's not 4557 // do anything now, but just flag that it needs to be restarted when done pausing. 4558 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4559 "Config is skipping already pausing " + r); 4560 r.deferRelaunchUntilPaused = true; 4561 r.preserveWindowOnDeferredRelaunch = preserveWindow; 4562 return true; 4563 } else if (r.state == ActivityState.RESUMED) { 4564 // Try to optimize this case: the configuration is changing and we need to restart 4565 // the top, resumed activity. Instead of doing the normal handshaking, just say 4566 // "restart!". 4567 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4568 "Config is relaunching resumed " + r); 4569 4570 if (DEBUG_STATES && !r.visible) { 4571 Slog.v(TAG_STATES, "Config is relaunching resumed invisible activity " + r 4572 + " called by " + Debug.getCallers(4)); 4573 } 4574 4575 relaunchActivityLocked(r, r.configChangeFlags, true, preserveWindow); 4576 } else { 4577 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4578 "Config is relaunching non-resumed " + r); 4579 relaunchActivityLocked(r, r.configChangeFlags, false, preserveWindow); 4580 } 4581 4582 // All done... tell the caller we weren't able to keep this activity around. 4583 return false; 4584 } 4585 4586 // Default case: the activity can handle this new configuration, so hand it over. 4587 // NOTE: We only forward the task override configuration as the system level configuration 4588 // changes is always sent to all processes when they happen so it can just use whatever 4589 // system level configuration it last got. 4590 r.scheduleConfigurationChanged(taskConfig, true); 4591 r.stopFreezingScreenLocked(false); 4592 4593 return true; 4594 } 4595 4596 private int getTaskConfigurationChanges(ActivityRecord record, Configuration taskConfig, 4597 Configuration oldTaskOverride) { 4598 4599 // If we went from full-screen to non-full-screen, make sure to use the correct 4600 // configuration task diff, so the diff stays as small as possible. 4601 if (Configuration.EMPTY.equals(oldTaskOverride) 4602 && !Configuration.EMPTY.equals(taskConfig)) { 4603 oldTaskOverride = record.task.extractOverrideConfig(record.configuration); 4604 } 4605 4606 // Conversely, do the same when going the other direction. 4607 if (Configuration.EMPTY.equals(taskConfig) 4608 && !Configuration.EMPTY.equals(oldTaskOverride)) { 4609 taskConfig = record.task.extractOverrideConfig(record.configuration); 4610 } 4611 4612 // Determine what has changed. May be nothing, if this is a config 4613 // that has come back from the app after going idle. In that case 4614 // we just want to leave the official config object now in the 4615 // activity and do nothing else. 4616 int taskChanges = oldTaskOverride.diff(taskConfig); 4617 // We don't want to use size changes if they don't cross boundaries that are important to 4618 // the app. 4619 if ((taskChanges & CONFIG_SCREEN_SIZE) != 0) { 4620 final boolean crosses = record.crossesHorizontalSizeThreshold( 4621 oldTaskOverride.screenWidthDp, taskConfig.screenWidthDp) 4622 || record.crossesVerticalSizeThreshold( 4623 oldTaskOverride.screenHeightDp, taskConfig.screenHeightDp); 4624 if (!crosses) { 4625 taskChanges &= ~CONFIG_SCREEN_SIZE; 4626 } 4627 } 4628 if ((taskChanges & CONFIG_SMALLEST_SCREEN_SIZE) != 0) { 4629 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4630 final int newSmallest = taskConfig.smallestScreenWidthDp; 4631 if (!record.crossesSmallestSizeThreshold(oldSmallest, newSmallest)) { 4632 taskChanges &= ~CONFIG_SMALLEST_SCREEN_SIZE; 4633 } 4634 } 4635 return catchConfigChangesFromUnset(taskConfig, oldTaskOverride, taskChanges); 4636 } 4637 4638 private static int catchConfigChangesFromUnset(Configuration taskConfig, 4639 Configuration oldTaskOverride, int taskChanges) { 4640 if (taskChanges == 0) { 4641 // {@link Configuration#diff} doesn't catch changes from unset values. 4642 // Check for changes we care about. 4643 if (oldTaskOverride.orientation != taskConfig.orientation) { 4644 taskChanges |= CONFIG_ORIENTATION; 4645 } 4646 // We want to explicitly track situations where the size configuration goes from 4647 // undefined to defined. We don't care about crossing the threshold in that case, 4648 // because there is no threshold. 4649 final int oldHeight = oldTaskOverride.screenHeightDp; 4650 final int newHeight = taskConfig.screenHeightDp; 4651 final int undefinedHeight = Configuration.SCREEN_HEIGHT_DP_UNDEFINED; 4652 if ((oldHeight == undefinedHeight && newHeight != undefinedHeight) 4653 || (oldHeight != undefinedHeight && newHeight == undefinedHeight)) { 4654 taskChanges |= CONFIG_SCREEN_SIZE; 4655 } 4656 final int oldWidth = oldTaskOverride.screenWidthDp; 4657 final int newWidth = taskConfig.screenWidthDp; 4658 final int undefinedWidth = Configuration.SCREEN_WIDTH_DP_UNDEFINED; 4659 if ((oldWidth == undefinedWidth && newWidth != undefinedWidth) 4660 || (oldWidth != undefinedWidth && newWidth == undefinedWidth)) { 4661 taskChanges |= CONFIG_SCREEN_SIZE; 4662 } 4663 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4664 final int newSmallest = taskConfig.smallestScreenWidthDp; 4665 final int undefinedSmallest = Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED; 4666 if ((oldSmallest == undefinedSmallest && newSmallest != undefinedSmallest) 4667 || (oldSmallest != undefinedSmallest && newSmallest == undefinedSmallest)) { 4668 taskChanges |= CONFIG_SMALLEST_SCREEN_SIZE; 4669 } 4670 final int oldLayout = oldTaskOverride.screenLayout; 4671 final int newLayout = taskConfig.screenLayout; 4672 if ((oldLayout == SCREENLAYOUT_UNDEFINED && newLayout != SCREENLAYOUT_UNDEFINED) 4673 || (oldLayout != SCREENLAYOUT_UNDEFINED && newLayout == SCREENLAYOUT_UNDEFINED)) { 4674 taskChanges |= CONFIG_SCREEN_LAYOUT; 4675 } 4676 } 4677 return taskChanges; 4678 } 4679 4680 private static boolean isResizeOnlyChange(int change) { 4681 return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION 4682 | CONFIG_SCREEN_LAYOUT)) == 0; 4683 } 4684 4685 private void relaunchActivityLocked( 4686 ActivityRecord r, int changes, boolean andResume, boolean preserveWindow) { 4687 if (mService.mSuppressResizeConfigChanges && preserveWindow) { 4688 r.configChangeFlags = 0; 4689 return; 4690 } 4691 4692 List<ResultInfo> results = null; 4693 List<ReferrerIntent> newIntents = null; 4694 if (andResume) { 4695 results = r.results; 4696 newIntents = r.newIntents; 4697 } 4698 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 4699 "Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents 4700 + " andResume=" + andResume + " preserveWindow=" + preserveWindow); 4701 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 4702 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 4703 r.task.taskId, r.shortComponentName); 4704 4705 r.startFreezingScreenLocked(r.app, 0); 4706 4707 mStackSupervisor.removeChildActivityContainers(r); 4708 4709 try { 4710 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, 4711 "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r 4712 + " callers=" + Debug.getCallers(6)); 4713 r.forceNewConfig = false; 4714 mStackSupervisor.activityRelaunchingLocked(r); 4715 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, 4716 !andResume, new Configuration(mService.mConfiguration), 4717 new Configuration(r.task.mOverrideConfig), preserveWindow); 4718 // Note: don't need to call pauseIfSleepingLocked() here, because 4719 // the caller will only pass in 'andResume' if this activity is 4720 // currently resumed, which implies we aren't sleeping. 4721 } catch (RemoteException e) { 4722 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e); 4723 } 4724 4725 if (andResume) { 4726 if (DEBUG_STATES) { 4727 Slog.d(TAG_STATES, "Resumed after relaunch " + r); 4728 } 4729 r.state = ActivityState.RESUMED; 4730 // Relaunch-resume could happen either when the app is already in the front, 4731 // or while it's being brought to front. In the latter case, it's marked RESUMED 4732 // but not yet visible (or stopped). We need to complete the resume here as the 4733 // code in resumeTopActivityInnerLocked to complete the resume might be skipped. 4734 if (!r.visible || r.stopped) { 4735 mWindowManager.setAppVisibility(r.appToken, true); 4736 completeResumeLocked(r); 4737 } else { 4738 r.results = null; 4739 r.newIntents = null; 4740 } 4741 } else { 4742 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 4743 r.state = ActivityState.PAUSED; 4744 } 4745 4746 r.configChangeFlags = 0; 4747 r.deferRelaunchUntilPaused = false; 4748 r.preserveWindowOnDeferredRelaunch = false; 4749 } 4750 4751 boolean willActivityBeVisibleLocked(IBinder token) { 4752 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4753 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4754 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4755 final ActivityRecord r = activities.get(activityNdx); 4756 if (r.appToken == token) { 4757 return true; 4758 } 4759 if (r.fullscreen && !r.finishing) { 4760 return false; 4761 } 4762 } 4763 } 4764 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 4765 if (r == null) { 4766 return false; 4767 } 4768 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 4769 + " would have returned true for r=" + r); 4770 return !r.finishing; 4771 } 4772 4773 void closeSystemDialogsLocked() { 4774 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4775 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4776 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4777 final ActivityRecord r = activities.get(activityNdx); 4778 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 4779 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 4780 } 4781 } 4782 } 4783 } 4784 4785 boolean finishDisabledPackageActivitiesLocked(String packageName, Set<String> filterByClasses, 4786 boolean doit, boolean evenPersistent, int userId) { 4787 boolean didSomething = false; 4788 TaskRecord lastTask = null; 4789 ComponentName homeActivity = null; 4790 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4791 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4792 int numActivities = activities.size(); 4793 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 4794 ActivityRecord r = activities.get(activityNdx); 4795 final boolean sameComponent = 4796 (r.packageName.equals(packageName) && (filterByClasses == null 4797 || filterByClasses.contains(r.realActivity.getClassName()))) 4798 || (packageName == null && r.userId == userId); 4799 if ((userId == UserHandle.USER_ALL || r.userId == userId) 4800 && (sameComponent || r.task == lastTask) 4801 && (r.app == null || evenPersistent || !r.app.persistent)) { 4802 if (!doit) { 4803 if (r.finishing) { 4804 // If this activity is just finishing, then it is not 4805 // interesting as far as something to stop. 4806 continue; 4807 } 4808 return true; 4809 } 4810 if (r.isHomeActivity()) { 4811 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 4812 Slog.i(TAG, "Skip force-stop again " + r); 4813 continue; 4814 } else { 4815 homeActivity = r.realActivity; 4816 } 4817 } 4818 didSomething = true; 4819 Slog.i(TAG, " Force finishing activity " + r); 4820 if (sameComponent) { 4821 if (r.app != null) { 4822 r.app.removed = true; 4823 } 4824 r.app = null; 4825 } 4826 lastTask = r.task; 4827 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 4828 true)) { 4829 // r has been deleted from mActivities, accommodate. 4830 --numActivities; 4831 --activityNdx; 4832 } 4833 } 4834 } 4835 } 4836 return didSomething; 4837 } 4838 4839 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 4840 boolean focusedStack = mStackSupervisor.getFocusedStack() == this; 4841 boolean topTask = true; 4842 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4843 final TaskRecord task = mTaskHistory.get(taskNdx); 4844 if (task.getTopActivity() == null) { 4845 continue; 4846 } 4847 ActivityRecord r = null; 4848 ActivityRecord top = null; 4849 ActivityRecord tmp; 4850 int numActivities = 0; 4851 int numRunning = 0; 4852 final ArrayList<ActivityRecord> activities = task.mActivities; 4853 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 4854 continue; 4855 } 4856 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4857 tmp = activities.get(activityNdx); 4858 if (tmp.finishing) { 4859 continue; 4860 } 4861 r = tmp; 4862 4863 // Initialize state for next task if needed. 4864 if (top == null || (top.state == ActivityState.INITIALIZING)) { 4865 top = r; 4866 numActivities = numRunning = 0; 4867 } 4868 4869 // Add 'r' into the current task. 4870 numActivities++; 4871 if (r.app != null && r.app.thread != null) { 4872 numRunning++; 4873 } 4874 4875 if (DEBUG_ALL) Slog.v( 4876 TAG, r.intent.getComponent().flattenToShortString() 4877 + ": task=" + r.task); 4878 } 4879 4880 RunningTaskInfo ci = new RunningTaskInfo(); 4881 ci.id = task.taskId; 4882 ci.stackId = mStackId; 4883 ci.baseActivity = r.intent.getComponent(); 4884 ci.topActivity = top.intent.getComponent(); 4885 ci.lastActiveTime = task.lastActiveTime; 4886 if (focusedStack && topTask) { 4887 // Give the latest time to ensure foreground task can be sorted 4888 // at the first, because lastActiveTime of creating task is 0. 4889 ci.lastActiveTime = System.currentTimeMillis(); 4890 topTask = false; 4891 } 4892 4893 if (top.task != null) { 4894 ci.description = top.task.lastDescription; 4895 } 4896 ci.numActivities = numActivities; 4897 ci.numRunning = numRunning; 4898 ci.isDockable = task.canGoInDockedStack(); 4899 ci.resizeMode = task.mResizeMode; 4900 list.add(ci); 4901 } 4902 } 4903 4904 public void unhandledBackLocked() { 4905 final int top = mTaskHistory.size() - 1; 4906 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top); 4907 if (top >= 0) { 4908 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 4909 int activityTop = activities.size() - 1; 4910 if (activityTop > 0) { 4911 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 4912 "unhandled-back", true); 4913 } 4914 } 4915 } 4916 4917 /** 4918 * Reset local parameters because an app's activity died. 4919 * @param app The app of the activity that died. 4920 * @return result from removeHistoryRecordsForAppLocked. 4921 */ 4922 boolean handleAppDiedLocked(ProcessRecord app) { 4923 if (mPausingActivity != null && mPausingActivity.app == app) { 4924 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE, 4925 "App died while pausing: " + mPausingActivity); 4926 mPausingActivity = null; 4927 } 4928 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 4929 mLastPausedActivity = null; 4930 mLastNoHistoryActivity = null; 4931 } 4932 4933 return removeHistoryRecordsForAppLocked(app); 4934 } 4935 4936 void handleAppCrashLocked(ProcessRecord app) { 4937 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4938 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4939 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4940 final ActivityRecord r = activities.get(activityNdx); 4941 if (r.app == app) { 4942 Slog.w(TAG, " Force finishing activity " 4943 + r.intent.getComponent().flattenToShortString()); 4944 // Force the destroy to skip right to removal. 4945 r.app = null; 4946 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4947 } 4948 } 4949 } 4950 } 4951 4952 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4953 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4954 boolean printed = false; 4955 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4956 final TaskRecord task = mTaskHistory.get(taskNdx); 4957 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4958 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4959 dumpClient, dumpPackage, needSep, header, 4960 " Task id #" + task.taskId + "\n" + 4961 " mFullscreen=" + task.mFullscreen + "\n" + 4962 " mBounds=" + task.mBounds + "\n" + 4963 " mMinWidth=" + task.mMinWidth + "\n" + 4964 " mMinHeight=" + task.mMinHeight + "\n" + 4965 " mLastNonFullscreenBounds=" + task.mLastNonFullscreenBounds); 4966 if (printed) { 4967 header = null; 4968 } 4969 } 4970 return printed; 4971 } 4972 4973 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4974 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4975 4976 if ("all".equals(name)) { 4977 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4978 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4979 } 4980 } else if ("top".equals(name)) { 4981 final int top = mTaskHistory.size() - 1; 4982 if (top >= 0) { 4983 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4984 int listTop = list.size() - 1; 4985 if (listTop >= 0) { 4986 activities.add(list.get(listTop)); 4987 } 4988 } 4989 } else { 4990 ItemMatcher matcher = new ItemMatcher(); 4991 matcher.build(name); 4992 4993 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4994 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4995 if (matcher.match(r1, r1.intent.getComponent())) { 4996 activities.add(r1); 4997 } 4998 } 4999 } 5000 } 5001 5002 return activities; 5003 } 5004 5005 ActivityRecord restartPackage(String packageName) { 5006 ActivityRecord starting = topRunningActivityLocked(); 5007 5008 // All activities that came from the package must be 5009 // restarted as if there was a config change. 5010 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 5011 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 5012 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 5013 final ActivityRecord a = activities.get(activityNdx); 5014 if (a.info.packageName.equals(packageName)) { 5015 a.forceNewConfig = true; 5016 if (starting != null && a == starting && a.visible) { 5017 a.startFreezingScreenLocked(starting.app, 5018 CONFIG_SCREEN_LAYOUT); 5019 } 5020 } 5021 } 5022 } 5023 5024 return starting; 5025 } 5026 5027 void removeTask(TaskRecord task, String reason) { 5028 removeTask(task, reason, REMOVE_TASK_MODE_DESTROYING); 5029 } 5030 5031 /** 5032 * Removes the input task from this stack. 5033 * @param task to remove. 5034 * @param reason for removal. 5035 * @param mode task removal mode. Either {@link #REMOVE_TASK_MODE_DESTROYING}, 5036 * {@link #REMOVE_TASK_MODE_MOVING}, {@link #REMOVE_TASK_MODE_MOVING_TO_TOP}. 5037 */ 5038 void removeTask(TaskRecord task, String reason, int mode) { 5039 if (mode == REMOVE_TASK_MODE_DESTROYING) { 5040 mStackSupervisor.removeLockedTaskLocked(task); 5041 mWindowManager.removeTask(task.taskId); 5042 if (!StackId.persistTaskBounds(mStackId)) { 5043 // Reset current bounds for task whose bounds shouldn't be persisted so it uses 5044 // default configuration the next time it launches. 5045 task.updateOverrideConfiguration(null); 5046 } 5047 } 5048 5049 final ActivityRecord r = mResumedActivity; 5050 if (r != null && r.task == task) { 5051 mResumedActivity = null; 5052 } 5053 5054 final int taskNdx = mTaskHistory.indexOf(task); 5055 final int topTaskNdx = mTaskHistory.size() - 1; 5056 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 5057 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 5058 if (!nextTask.isOverHomeStack()) { 5059 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 5060 } 5061 } 5062 mTaskHistory.remove(task); 5063 updateTaskMovement(task, true); 5064 5065 if (mode == REMOVE_TASK_MODE_DESTROYING && task.mActivities.isEmpty()) { 5066 // TODO: VI what about activity? 5067 final boolean isVoiceSession = task.voiceSession != null; 5068 if (isVoiceSession) { 5069 try { 5070 task.voiceSession.taskFinished(task.intent, task.taskId); 5071 } catch (RemoteException e) { 5072 } 5073 } 5074 if (task.autoRemoveFromRecents() || isVoiceSession) { 5075 // Task creator asked to remove this when done, or this task was a voice 5076 // interaction, so it should not remain on the recent tasks list. 5077 mRecentTasks.remove(task); 5078 task.removedFromRecents(); 5079 } 5080 } 5081 5082 if (mTaskHistory.isEmpty()) { 5083 if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this); 5084 // We only need to adjust focused stack if this stack is in focus and we are not in the 5085 // process of moving the task to the top of the stack that will be focused. 5086 if (isOnHomeDisplay() && mode != REMOVE_TASK_MODE_MOVING_TO_TOP 5087 && mStackSupervisor.isFocusedStack(this)) { 5088 String myReason = reason + " leftTaskHistoryEmpty"; 5089 if (mFullscreen 5090 || !adjustFocusToNextFocusableStackLocked( 5091 task.getTaskToReturnTo(), myReason)) { 5092 mStackSupervisor.moveHomeStackToFront(myReason); 5093 } 5094 } 5095 if (mStacks != null) { 5096 mStacks.remove(this); 5097 mStacks.add(0, this); 5098 } 5099 if (!isHomeStack()) { 5100 mActivityContainer.onTaskListEmptyLocked(); 5101 } 5102 } 5103 5104 task.stack = null; 5105 } 5106 5107 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 5108 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 5109 boolean toTop) { 5110 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 5111 voiceInteractor); 5112 // add the task to stack first, mTaskPositioner might need the stack association 5113 addTask(task, toTop, "createTaskRecord"); 5114 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 5115 if (!layoutTaskInStack(task, info.windowLayout) && mBounds != null && task.isResizeable() 5116 && !isLockscreenShown) { 5117 task.updateOverrideConfiguration(mBounds); 5118 } 5119 return task; 5120 } 5121 5122 boolean layoutTaskInStack(TaskRecord task, ActivityInfo.WindowLayout windowLayout) { 5123 if (mTaskPositioner == null) { 5124 return false; 5125 } 5126 mTaskPositioner.updateDefaultBounds(task, mTaskHistory, windowLayout); 5127 return true; 5128 } 5129 5130 ArrayList<TaskRecord> getAllTasks() { 5131 return new ArrayList<>(mTaskHistory); 5132 } 5133 5134 void addTask(final TaskRecord task, final boolean toTop, String reason) { 5135 final ActivityStack prevStack = preAddTask(task, reason, toTop); 5136 5137 task.stack = this; 5138 if (toTop) { 5139 insertTaskAtTop(task, null); 5140 } else { 5141 mTaskHistory.add(0, task); 5142 updateTaskMovement(task, false); 5143 } 5144 postAddTask(task, prevStack); 5145 } 5146 5147 void positionTask(final TaskRecord task, int position) { 5148 final ActivityRecord topRunningActivity = task.topRunningActivityLocked(); 5149 final boolean wasResumed = topRunningActivity == task.stack.mResumedActivity; 5150 final ActivityStack prevStack = preAddTask(task, "positionTask", !ON_TOP); 5151 task.stack = this; 5152 insertTaskAtPosition(task, position); 5153 postAddTask(task, prevStack); 5154 if (wasResumed) { 5155 if (mResumedActivity != null) { 5156 Log.wtf(TAG, "mResumedActivity was already set when moving mResumedActivity from" 5157 + " other stack to this stack mResumedActivity=" + mResumedActivity 5158 + " other mResumedActivity=" + topRunningActivity); 5159 } 5160 mResumedActivity = topRunningActivity; 5161 } 5162 } 5163 5164 private ActivityStack preAddTask(TaskRecord task, String reason, boolean toTop) { 5165 final ActivityStack prevStack = task.stack; 5166 if (prevStack != null && prevStack != this) { 5167 prevStack.removeTask(task, reason, 5168 toTop ? REMOVE_TASK_MODE_MOVING_TO_TOP : REMOVE_TASK_MODE_MOVING); 5169 } 5170 return prevStack; 5171 } 5172 5173 private void postAddTask(TaskRecord task, ActivityStack prevStack) { 5174 if (prevStack != null) { 5175 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5176 } else if (task.voiceSession != null) { 5177 try { 5178 task.voiceSession.taskStarted(task.intent, task.taskId); 5179 } catch (RemoteException e) { 5180 } 5181 } 5182 } 5183 5184 void addConfigOverride(ActivityRecord r, TaskRecord task) { 5185 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5186 // TODO: VI deal with activity 5187 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 5188 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 5189 (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, r.info.configChanges, 5190 task.voiceSession != null, r.mLaunchTaskBehind, bounds, task.mOverrideConfig, 5191 task.mResizeMode, r.isAlwaysFocusable(), task.isHomeTask(), 5192 r.appInfo.targetSdkVersion); 5193 r.taskConfigOverride = task.mOverrideConfig; 5194 } 5195 5196 void moveToFrontAndResumeStateIfNeeded( 5197 ActivityRecord r, boolean moveToFront, boolean setResume, String reason) { 5198 if (!moveToFront) { 5199 return; 5200 } 5201 5202 // If the activity owns the last resumed activity, transfer that together, 5203 // so that we don't resume the same activity again in the new stack. 5204 // Apps may depend on onResume()/onPause() being called in pairs. 5205 if (setResume) { 5206 mResumedActivity = r; 5207 } 5208 // Move the stack in which we are placing the activity to the front. The call will also 5209 // make sure the activity focus is set. 5210 moveToFront(reason); 5211 } 5212 5213 /** 5214 * Moves the input activity from its current stack to this one. 5215 * NOTE: The current task of the activity isn't moved to this stack. Instead a new task is 5216 * created on this stack which the activity is added to. 5217 * */ 5218 void moveActivityToStack(ActivityRecord r) { 5219 final ActivityStack prevStack = r.task.stack; 5220 if (prevStack.mStackId == mStackId) { 5221 // You are already in the right stack silly... 5222 return; 5223 } 5224 5225 final boolean wasFocused = mStackSupervisor.isFocusedStack(prevStack) 5226 && (mStackSupervisor.topRunningActivityLocked() == r); 5227 final boolean wasResumed = wasFocused && (prevStack.mResumedActivity == r); 5228 5229 final TaskRecord task = createTaskRecord( 5230 mStackSupervisor.getNextTaskIdForUserLocked(r.userId), 5231 r.info, r.intent, null, null, true); 5232 r.setTask(task, null); 5233 task.addActivityToTop(r); 5234 setAppTask(r, task); 5235 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5236 moveToFrontAndResumeStateIfNeeded(r, wasFocused, wasResumed, "moveActivityToStack"); 5237 if (wasResumed) { 5238 prevStack.mResumedActivity = null; 5239 } 5240 } 5241 5242 private void setAppTask(ActivityRecord r, TaskRecord task) { 5243 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5244 mWindowManager.setAppTask(r.appToken, task.taskId, mStackId, bounds, task.mOverrideConfig, 5245 task.mResizeMode, task.isHomeTask()); 5246 r.taskConfigOverride = task.mOverrideConfig; 5247 } 5248 5249 public int getStackId() { 5250 return mStackId; 5251 } 5252 5253 @Override 5254 public String toString() { 5255 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 5256 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 5257 } 5258 5259 void onLockTaskPackagesUpdatedLocked() { 5260 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 5261 mTaskHistory.get(taskNdx).setLockTaskAuth(); 5262 } 5263 } 5264} 5265