ActivityStack.java revision 7df9b45bfe3cc6a6b3f33be008bb69a31b15999f
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 ComponentName cls = intent.getComponent(); 830 if (info.targetActivity != null) { 831 cls = new ComponentName(info.packageName, info.targetActivity); 832 } 833 final int userId = UserHandle.getUserId(info.applicationInfo.uid); 834 835 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 836 final TaskRecord task = mTaskHistory.get(taskNdx); 837 final boolean notCurrentUserTask = 838 !mStackSupervisor.isCurrentProfileLocked(task.userId); 839 final ArrayList<ActivityRecord> activities = task.mActivities; 840 841 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 842 ActivityRecord r = activities.get(activityNdx); 843 if (notCurrentUserTask && (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) { 844 continue; 845 } 846 if (!r.finishing && r.intent.getComponent().equals(cls) && r.userId == userId) { 847 return r; 848 } 849 } 850 } 851 852 return null; 853 } 854 855 /* 856 * Move the activities around in the stack to bring a user to the foreground. 857 */ 858 final void switchUserLocked(int userId) { 859 if (mCurrentUser == userId) { 860 return; 861 } 862 mCurrentUser = userId; 863 864 // Move userId's tasks to the top. 865 int index = mTaskHistory.size(); 866 for (int i = 0; i < index; ) { 867 final TaskRecord task = mTaskHistory.get(i); 868 869 // NOTE: If {@link TaskRecord#topRunningActivityLocked} return is not null then it is 870 // okay to show the activity when locked. 871 if (mStackSupervisor.isCurrentProfileLocked(task.userId) 872 || task.topRunningActivityLocked() != null) { 873 if (DEBUG_TASKS) Slog.d(TAG_TASKS, "switchUserLocked: stack=" + getStackId() + 874 " moving " + task + " to top"); 875 mTaskHistory.remove(i); 876 mTaskHistory.add(task); 877 --index; 878 // Use same value for i. 879 } else { 880 ++i; 881 } 882 } 883 if (VALIDATE_TOKENS) { 884 validateAppTokensLocked(); 885 } 886 } 887 888 void minimalResumeActivityLocked(ActivityRecord r) { 889 r.state = ActivityState.RESUMED; 890 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + r + " (starting new instance)" 891 + " callers=" + Debug.getCallers(5)); 892 mResumedActivity = r; 893 r.task.touchActiveTime(); 894 mRecentTasks.addLocked(r.task); 895 completeResumeLocked(r); 896 mStackSupervisor.checkReadyForSleepLocked(); 897 setLaunchTime(r); 898 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 899 "Launch completed; removing icicle of " + r.icicle); 900 } 901 902 void addRecentActivityLocked(ActivityRecord r) { 903 if (r != null) { 904 mRecentTasks.addLocked(r.task); 905 r.task.touchActiveTime(); 906 } 907 } 908 909 private void startLaunchTraces(String packageName) { 910 if (mFullyDrawnStartTime != 0) { 911 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 912 } 913 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "launching: " + packageName, 0); 914 Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 915 } 916 917 private void stopFullyDrawnTraceIfNeeded() { 918 if (mFullyDrawnStartTime != 0 && mLaunchStartTime == 0) { 919 Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, "drawing", 0); 920 mFullyDrawnStartTime = 0; 921 } 922 } 923 924 void setLaunchTime(ActivityRecord r) { 925 if (r.displayStartTime == 0) { 926 r.fullyDrawnStartTime = r.displayStartTime = SystemClock.uptimeMillis(); 927 if (r.task != null) { 928 r.task.isLaunching = true; 929 } 930 if (mLaunchStartTime == 0) { 931 startLaunchTraces(r.packageName); 932 mLaunchStartTime = mFullyDrawnStartTime = r.displayStartTime; 933 } 934 } else if (mLaunchStartTime == 0) { 935 startLaunchTraces(r.packageName); 936 mLaunchStartTime = mFullyDrawnStartTime = SystemClock.uptimeMillis(); 937 } 938 } 939 940 void clearLaunchTime(ActivityRecord r) { 941 // Make sure that there is no activity waiting for this to launch. 942 if (mStackSupervisor.mWaitingActivityLaunched.isEmpty()) { 943 r.displayStartTime = r.fullyDrawnStartTime = 0; 944 if (r.task != null) { 945 r.task.isLaunching = false; 946 } 947 } else { 948 mStackSupervisor.removeTimeoutsForActivityLocked(r); 949 mStackSupervisor.scheduleIdleTimeoutLocked(r); 950 } 951 } 952 953 void awakeFromSleepingLocked() { 954 // Ensure activities are no longer sleeping. 955 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 956 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 957 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 958 activities.get(activityNdx).setSleeping(false); 959 } 960 } 961 if (mPausingActivity != null) { 962 Slog.d(TAG, "awakeFromSleepingLocked: previously pausing activity didn't pause"); 963 activityPausedLocked(mPausingActivity.appToken, true); 964 } 965 } 966 967 void updateActivityApplicationInfoLocked(ApplicationInfo aInfo) { 968 final String packageName = aInfo.packageName; 969 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 970 final List<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 971 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 972 if (packageName.equals(activities.get(activityNdx).packageName)) { 973 activities.get(activityNdx).info.applicationInfo = aInfo; 974 } 975 } 976 } 977 } 978 979 /** 980 * @return true if something must be done before going to sleep. 981 */ 982 boolean checkReadyForSleepLocked() { 983 if (mResumedActivity != null) { 984 // Still have something resumed; can't sleep until it is paused. 985 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep needs to pause " + mResumedActivity); 986 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 987 "Sleep => pause with userLeaving=false"); 988 startPausingLocked(false, true, false, false); 989 return true; 990 } 991 if (mPausingActivity != null) { 992 // Still waiting for something to pause; can't sleep yet. 993 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Sleep still waiting to pause " + mPausingActivity); 994 return true; 995 } 996 997 if (hasVisibleBehindActivity()) { 998 // Stop visible behind activity before going to sleep. 999 final ActivityRecord r = getVisibleBehindActivity(); 1000 mStackSupervisor.mStoppingActivities.add(r); 1001 if (DEBUG_STATES) Slog.v(TAG_STATES, "Sleep still waiting to stop visible behind " + r); 1002 return true; 1003 } 1004 1005 return false; 1006 } 1007 1008 void goToSleep() { 1009 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1010 1011 // Make sure any paused or stopped but visible activities are now sleeping. 1012 // This ensures that the activity's onStop() is called. 1013 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1014 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 1015 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1016 final ActivityRecord r = activities.get(activityNdx); 1017 if (r.state == ActivityState.STOPPING || r.state == ActivityState.STOPPED 1018 || r.state == ActivityState.PAUSED || r.state == ActivityState.PAUSING) { 1019 r.setSleeping(true); 1020 } 1021 } 1022 } 1023 } 1024 1025 public final Bitmap screenshotActivitiesLocked(ActivityRecord who) { 1026 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "screenshotActivitiesLocked: " + who); 1027 if (who.noDisplay) { 1028 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tNo display"); 1029 return null; 1030 } 1031 1032 if (isHomeStack()) { 1033 // This is an optimization -- since we never show Home or Recents within Recents itself, 1034 // we can just go ahead and skip taking the screenshot if this is the home stack. 1035 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tHome stack"); 1036 return null; 1037 } 1038 1039 int w = mService.mThumbnailWidth; 1040 int h = mService.mThumbnailHeight; 1041 float scale = 1f; 1042 if (w > 0) { 1043 if (DEBUG_SCREENSHOTS) Slog.d(TAG_SCREENSHOTS, "\tTaking screenshot"); 1044 1045 // When this flag is set, we currently take the fullscreen screenshot of the activity 1046 // but scaled to half the size. This gives us a "good-enough" fullscreen thumbnail to 1047 // use within SystemUI while keeping memory usage low. 1048 if (ActivityManagerService.TAKE_FULLSCREEN_SCREENSHOTS) { 1049 w = h = -1; 1050 scale = mService.mFullscreenThumbnailScale; 1051 } 1052 return mWindowManager.screenshotApplications(who.appToken, Display.DEFAULT_DISPLAY, 1053 w, h, scale); 1054 } 1055 Slog.e(TAG, "Invalid thumbnail dimensions: " + w + "x" + h); 1056 return null; 1057 } 1058 1059 /** 1060 * Start pausing the currently resumed activity. It is an error to call this if there 1061 * is already an activity being paused or there is no resumed activity. 1062 * 1063 * @param userLeaving True if this should result in an onUserLeaving to the current activity. 1064 * @param uiSleeping True if this is happening with the user interface going to sleep (the 1065 * screen turning off). 1066 * @param resuming True if this is being called as part of resuming the top activity, so 1067 * we shouldn't try to instigate a resume here. 1068 * @param dontWait True if the caller does not want to wait for the pause to complete. If 1069 * set to true, we will immediately complete the pause here before returning. 1070 * @return Returns true if an activity now is in the PAUSING state, and we are waiting for 1071 * it to tell us when it is done. 1072 */ 1073 final boolean startPausingLocked(boolean userLeaving, boolean uiSleeping, boolean resuming, 1074 boolean dontWait) { 1075 if (mPausingActivity != null) { 1076 Slog.wtf(TAG, "Going to pause when pause is already pending for " + mPausingActivity 1077 + " state=" + mPausingActivity.state); 1078 if (!mService.isSleeping()) { 1079 // Avoid recursion among check for sleep and complete pause during sleeping. 1080 // Because activity will be paused immediately after resume, just let pause 1081 // be completed by the order of activity paused from clients. 1082 completePauseLocked(false); 1083 } 1084 } 1085 ActivityRecord prev = mResumedActivity; 1086 if (prev == null) { 1087 if (!resuming) { 1088 Slog.wtf(TAG, "Trying to pause when nothing is resumed"); 1089 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1090 } 1091 return false; 1092 } 1093 1094 if (mActivityContainer.mParentActivity == null) { 1095 // Top level stack, not a child. Look for child stacks. 1096 mStackSupervisor.pauseChildStacks(prev, userLeaving, uiSleeping, resuming, dontWait); 1097 } 1098 1099 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSING: " + prev); 1100 else if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Start pausing: " + prev); 1101 mResumedActivity = null; 1102 mPausingActivity = prev; 1103 mLastPausedActivity = prev; 1104 mLastNoHistoryActivity = (prev.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 1105 || (prev.info.flags & ActivityInfo.FLAG_NO_HISTORY) != 0 ? prev : null; 1106 prev.state = ActivityState.PAUSING; 1107 prev.task.touchActiveTime(); 1108 clearLaunchTime(prev); 1109 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 1110 if (mService.mHasRecents 1111 && (next == null || next.noDisplay || next.task != prev.task || uiSleeping)) { 1112 prev.mUpdateTaskThumbnailWhenHidden = true; 1113 } 1114 stopFullyDrawnTraceIfNeeded(); 1115 1116 mService.updateCpuStats(); 1117 1118 if (prev.app != null && prev.app.thread != null) { 1119 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueueing pending pause: " + prev); 1120 try { 1121 EventLog.writeEvent(EventLogTags.AM_PAUSE_ACTIVITY, 1122 prev.userId, System.identityHashCode(prev), 1123 prev.shortComponentName); 1124 mService.updateUsageStats(prev, false); 1125 prev.app.thread.schedulePauseActivity(prev.appToken, prev.finishing, 1126 userLeaving, prev.configChangeFlags, dontWait); 1127 } catch (Exception e) { 1128 // Ignore exception, if process died other code will cleanup. 1129 Slog.w(TAG, "Exception thrown during pause", e); 1130 mPausingActivity = null; 1131 mLastPausedActivity = null; 1132 mLastNoHistoryActivity = null; 1133 } 1134 } else { 1135 mPausingActivity = null; 1136 mLastPausedActivity = null; 1137 mLastNoHistoryActivity = null; 1138 } 1139 1140 // If we are not going to sleep, we want to ensure the device is 1141 // awake until the next activity is started. 1142 if (!uiSleeping && !mService.isSleepingOrShuttingDown()) { 1143 mStackSupervisor.acquireLaunchWakelock(); 1144 } 1145 1146 if (mPausingActivity != null) { 1147 // Have the window manager pause its key dispatching until the new 1148 // activity has started. If we're pausing the activity just because 1149 // the screen is being turned off and the UI is sleeping, don't interrupt 1150 // key dispatch; the same activity will pick it up again on wakeup. 1151 if (!uiSleeping) { 1152 prev.pauseKeyDispatchingLocked(); 1153 } else if (DEBUG_PAUSE) { 1154 Slog.v(TAG_PAUSE, "Key dispatch not paused for screen off"); 1155 } 1156 1157 if (dontWait) { 1158 // If the caller said they don't want to wait for the pause, then complete 1159 // the pause now. 1160 completePauseLocked(false); 1161 return false; 1162 1163 } else { 1164 // Schedule a pause timeout in case the app doesn't respond. 1165 // We don't give it much time because this directly impacts the 1166 // responsiveness seen by the user. 1167 Message msg = mHandler.obtainMessage(PAUSE_TIMEOUT_MSG); 1168 msg.obj = prev; 1169 prev.pauseTime = SystemClock.uptimeMillis(); 1170 mHandler.sendMessageDelayed(msg, PAUSE_TIMEOUT); 1171 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete..."); 1172 return true; 1173 } 1174 1175 } else { 1176 // This activity failed to schedule the 1177 // pause, so just treat it as being paused now. 1178 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Activity not running, resuming next."); 1179 if (!resuming) { 1180 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1181 } 1182 return false; 1183 } 1184 } 1185 1186 final void activityPausedLocked(IBinder token, boolean timeout) { 1187 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1188 "Activity paused: token=" + token + ", timeout=" + timeout); 1189 1190 final ActivityRecord r = isInStackLocked(token); 1191 if (r != null) { 1192 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 1193 if (mPausingActivity == r) { 1194 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + r 1195 + (timeout ? " (due to timeout)" : " (pause complete)")); 1196 completePauseLocked(true); 1197 return; 1198 } else { 1199 EventLog.writeEvent(EventLogTags.AM_FAILED_TO_PAUSE, 1200 r.userId, System.identityHashCode(r), r.shortComponentName, 1201 mPausingActivity != null 1202 ? mPausingActivity.shortComponentName : "(none)"); 1203 if (r.state == ActivityState.PAUSING) { 1204 r.state = ActivityState.PAUSED; 1205 if (r.finishing) { 1206 if (DEBUG_PAUSE) Slog.v(TAG, 1207 "Executing finish of failed to pause activity: " + r); 1208 finishCurrentActivityLocked(r, FINISH_AFTER_VISIBLE, false); 1209 } 1210 } 1211 } 1212 } 1213 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1214 } 1215 1216 final void activityResumedLocked(IBinder token) { 1217 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 1218 if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r); 1219 r.icicle = null; 1220 r.haveState = false; 1221 } 1222 1223 final void activityStoppedLocked(ActivityRecord r, Bundle icicle, 1224 PersistableBundle persistentState, CharSequence description) { 1225 if (r.state != ActivityState.STOPPING) { 1226 Slog.i(TAG, "Activity reported stop, but no longer stopping: " + r); 1227 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1228 return; 1229 } 1230 if (persistentState != null) { 1231 r.persistentState = persistentState; 1232 mService.notifyTaskPersisterLocked(r.task, false); 1233 } 1234 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + r + ": " + icicle); 1235 if (icicle != null) { 1236 // If icicle is null, this is happening due to a timeout, so we 1237 // haven't really saved the state. 1238 r.icicle = icicle; 1239 r.haveState = true; 1240 r.launchCount = 0; 1241 r.updateThumbnailLocked(null, description); 1242 } 1243 if (!r.stopped) { 1244 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + r + " (stop complete)"); 1245 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 1246 r.stopped = true; 1247 r.state = ActivityState.STOPPED; 1248 1249 mWindowManager.notifyAppStopped(r.appToken, true); 1250 1251 if (getVisibleBehindActivity() == r) { 1252 mStackSupervisor.requestVisibleBehindLocked(r, false); 1253 } 1254 if (r.finishing) { 1255 r.clearOptionsLocked(); 1256 } else { 1257 if (r.deferRelaunchUntilPaused) { 1258 destroyActivityLocked(r, true, "stop-config"); 1259 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1260 } else { 1261 mStackSupervisor.updatePreviousProcessLocked(r); 1262 } 1263 } 1264 } 1265 } 1266 1267 private void completePauseLocked(boolean resumeNext) { 1268 ActivityRecord prev = mPausingActivity; 1269 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Complete pause: " + prev); 1270 1271 if (prev != null) { 1272 final boolean wasStopping = prev.state == ActivityState.STOPPING; 1273 prev.state = ActivityState.PAUSED; 1274 if (prev.finishing) { 1275 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Executing finish of activity: " + prev); 1276 prev = finishCurrentActivityLocked(prev, FINISH_AFTER_VISIBLE, false); 1277 } else if (prev.app != null) { 1278 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Enqueue pending stop if needed: " + prev 1279 + " wasStopping=" + wasStopping + " visible=" + prev.visible); 1280 if (mStackSupervisor.mWaitingVisibleActivities.remove(prev)) { 1281 if (DEBUG_SWITCH || DEBUG_PAUSE) Slog.v(TAG_PAUSE, 1282 "Complete pause, no longer waiting: " + prev); 1283 } 1284 if (prev.deferRelaunchUntilPaused) { 1285 // Complete the deferred relaunch that was waiting for pause to complete. 1286 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Re-launching after pause: " + prev); 1287 relaunchActivityLocked(prev, prev.configChangeFlags, false, 1288 prev.preserveWindowOnDeferredRelaunch); 1289 } else if (wasStopping) { 1290 // We are also stopping, the stop request must have gone soon after the pause. 1291 // We can't clobber it, because the stop confirmation will not be handled. 1292 // We don't need to schedule another stop, we only need to let it happen. 1293 prev.state = ActivityState.STOPPING; 1294 } else if ((!prev.visible && !hasVisibleBehindActivity()) 1295 || mService.isSleepingOrShuttingDown()) { 1296 // If we were visible then resumeTopActivities will release resources before 1297 // stopping. 1298 addToStopping(prev, true /* immediate */); 1299 } 1300 } else { 1301 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "App died during pause, not stopping: " + prev); 1302 prev = null; 1303 } 1304 // It is possible the activity was freezing the screen before it was paused. 1305 // In that case go ahead and remove the freeze this activity has on the screen 1306 // since it is no longer visible. 1307 prev.stopFreezingScreenLocked(true /*force*/); 1308 mPausingActivity = null; 1309 } 1310 1311 if (resumeNext) { 1312 final ActivityStack topStack = mStackSupervisor.getFocusedStack(); 1313 if (!mService.isSleepingOrShuttingDown()) { 1314 mStackSupervisor.resumeFocusedStackTopActivityLocked(topStack, prev, null); 1315 } else { 1316 mStackSupervisor.checkReadyForSleepLocked(); 1317 ActivityRecord top = topStack.topRunningActivityLocked(); 1318 if (top == null || (prev != null && top != prev)) { 1319 // If there are no more activities available to run, do resume anyway to start 1320 // something. Also if the top activity on the stack is not the just paused 1321 // activity, we need to go ahead and resume it to ensure we complete an 1322 // in-flight app switch. 1323 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 1324 } 1325 } 1326 } 1327 1328 if (prev != null) { 1329 prev.resumeKeyDispatchingLocked(); 1330 1331 if (prev.app != null && prev.cpuTimeAtResume > 0 1332 && mService.mBatteryStatsService.isOnBattery()) { 1333 long diff = mService.mProcessCpuTracker.getCpuTimeForPid(prev.app.pid) 1334 - prev.cpuTimeAtResume; 1335 if (diff > 0) { 1336 BatteryStatsImpl bsi = mService.mBatteryStatsService.getActiveStatistics(); 1337 synchronized (bsi) { 1338 BatteryStatsImpl.Uid.Proc ps = 1339 bsi.getProcessStatsLocked(prev.info.applicationInfo.uid, 1340 prev.info.packageName); 1341 if (ps != null) { 1342 ps.addForegroundTimeLocked(diff); 1343 } 1344 } 1345 } 1346 } 1347 prev.cpuTimeAtResume = 0; // reset it 1348 } 1349 1350 // Notify when the task stack has changed, but only if visibilities changed (not just focus) 1351 if (mStackSupervisor.mAppVisibilitiesChangedSinceLastPause) { 1352 mService.notifyTaskStackChangedLocked(); 1353 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = false; 1354 } 1355 1356 mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 1357 } 1358 1359 private void addToStopping(ActivityRecord r, boolean immediate) { 1360 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 1361 mStackSupervisor.mStoppingActivities.add(r); 1362 } 1363 1364 // If we already have a few activities waiting to stop, then give up 1365 // on things going idle and start clearing them out. Or if r is the 1366 // last of activity of the last task the stack will be empty and must 1367 // be cleared immediately. 1368 boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE 1369 || (r.frontOfTask && mTaskHistory.size() <= 1); 1370 1371 if (immediate || forceIdle) { 1372 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle=" 1373 + forceIdle + "immediate=" + immediate); 1374 mStackSupervisor.scheduleIdleLocked(); 1375 } else { 1376 mStackSupervisor.checkReadyForSleepLocked(); 1377 } 1378 } 1379 1380 /** 1381 * Once we know that we have asked an application to put an activity in 1382 * the resumed state (either by launching it or explicitly telling it), 1383 * this function updates the rest of our state to match that fact. 1384 */ 1385 private void completeResumeLocked(ActivityRecord next) { 1386 next.visible = true; 1387 next.idle = false; 1388 next.results = null; 1389 next.newIntents = null; 1390 next.stopped = false; 1391 1392 if (next.isHomeActivity()) { 1393 ProcessRecord app = next.task.mActivities.get(0).app; 1394 if (app != null && app != mService.mHomeProcess) { 1395 mService.mHomeProcess = app; 1396 } 1397 } 1398 1399 if (next.nowVisible) { 1400 // We won't get a call to reportActivityVisibleLocked() so dismiss lockscreen now. 1401 mStackSupervisor.notifyActivityDrawnForKeyguard(); 1402 } 1403 1404 // schedule an idle timeout in case the app doesn't do it for us. 1405 mStackSupervisor.scheduleIdleTimeoutLocked(next); 1406 1407 mStackSupervisor.reportResumedActivityLocked(next); 1408 1409 next.resumeKeyDispatchingLocked(); 1410 mNoAnimActivities.clear(); 1411 1412 // Mark the point when the activity is resuming 1413 // TODO: To be more accurate, the mark should be before the onCreate, 1414 // not after the onResume. But for subsequent starts, onResume is fine. 1415 if (next.app != null) { 1416 next.cpuTimeAtResume = mService.mProcessCpuTracker.getCpuTimeForPid(next.app.pid); 1417 } else { 1418 next.cpuTimeAtResume = 0; // Couldn't get the cpu time of process 1419 } 1420 1421 next.returningOptions = null; 1422 1423 if (getVisibleBehindActivity() == next) { 1424 // When resuming an activity, require it to call requestVisibleBehind() again. 1425 setVisibleBehindActivity(null); 1426 } 1427 } 1428 1429 private void setVisible(ActivityRecord r, boolean visible) { 1430 r.visible = visible; 1431 if (!visible && r.mUpdateTaskThumbnailWhenHidden) { 1432 r.updateThumbnailLocked(r.task.stack.screenshotActivitiesLocked(r), null); 1433 r.mUpdateTaskThumbnailWhenHidden = false; 1434 } 1435 mWindowManager.setAppVisibility(r.appToken, visible); 1436 final ArrayList<ActivityContainer> containers = r.mChildContainers; 1437 for (int containerNdx = containers.size() - 1; containerNdx >= 0; --containerNdx) { 1438 ActivityContainer container = containers.get(containerNdx); 1439 container.setVisible(visible); 1440 } 1441 mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true; 1442 } 1443 1444 // Find the first visible activity above the passed activity and if it is translucent return it 1445 // otherwise return null; 1446 ActivityRecord findNextTranslucentActivity(ActivityRecord r) { 1447 TaskRecord task = r.task; 1448 if (task == null) { 1449 return null; 1450 } 1451 1452 ActivityStack stack = task.stack; 1453 if (stack == null) { 1454 return null; 1455 } 1456 1457 int stackNdx = mStacks.indexOf(stack); 1458 1459 ArrayList<TaskRecord> tasks = stack.mTaskHistory; 1460 int taskNdx = tasks.indexOf(task); 1461 1462 ArrayList<ActivityRecord> activities = task.mActivities; 1463 int activityNdx = activities.indexOf(r) + 1; 1464 1465 final int numStacks = mStacks.size(); 1466 while (stackNdx < numStacks) { 1467 final ActivityStack historyStack = mStacks.get(stackNdx); 1468 tasks = historyStack.mTaskHistory; 1469 final int numTasks = tasks.size(); 1470 while (taskNdx < numTasks) { 1471 final TaskRecord currentTask = tasks.get(taskNdx); 1472 activities = currentTask.mActivities; 1473 final int numActivities = activities.size(); 1474 while (activityNdx < numActivities) { 1475 final ActivityRecord activity = activities.get(activityNdx); 1476 if (!activity.finishing) { 1477 return historyStack.mFullscreen 1478 && currentTask.mFullscreen && activity.fullscreen ? null : activity; 1479 } 1480 ++activityNdx; 1481 } 1482 activityNdx = 0; 1483 ++taskNdx; 1484 } 1485 taskNdx = 0; 1486 ++stackNdx; 1487 } 1488 1489 return null; 1490 } 1491 1492 ActivityStack getNextFocusableStackLocked() { 1493 ArrayList<ActivityStack> stacks = mStacks; 1494 final ActivityRecord parent = mActivityContainer.mParentActivity; 1495 if (parent != null) { 1496 stacks = parent.task.stack.mStacks; 1497 } 1498 if (stacks != null) { 1499 for (int i = stacks.size() - 1; i >= 0; --i) { 1500 ActivityStack stack = stacks.get(i); 1501 if (stack != this && stack.isFocusable() 1502 && stack.getStackVisibilityLocked(null) != STACK_INVISIBLE) { 1503 return stack; 1504 } 1505 } 1506 } 1507 return null; 1508 } 1509 1510 /** Returns true if the stack contains a fullscreen task. */ 1511 private boolean hasFullscreenTask() { 1512 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 1513 final TaskRecord task = mTaskHistory.get(i); 1514 if (task.mFullscreen) { 1515 return true; 1516 } 1517 } 1518 return false; 1519 } 1520 1521 /** 1522 * Returns true if the stack is translucent and can have other contents visible behind it if 1523 * needed. A stack is considered translucent if it don't contain a visible or 1524 * starting (about to be visible) activity that is fullscreen (opaque). 1525 * @param starting The currently starting activity or null if there is none. 1526 * @param stackBehindId The id of the stack directly behind this one. 1527 */ 1528 private boolean isStackTranslucent(ActivityRecord starting, int stackBehindId) { 1529 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1530 final TaskRecord task = mTaskHistory.get(taskNdx); 1531 final ArrayList<ActivityRecord> activities = task.mActivities; 1532 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1533 final ActivityRecord r = activities.get(activityNdx); 1534 1535 if (r.finishing) { 1536 // We don't factor in finishing activities when determining translucency since 1537 // they will be gone soon. 1538 continue; 1539 } 1540 1541 if (!r.visible && r != starting) { 1542 // Also ignore invisible activities that are not the currently starting 1543 // activity (about to be visible). 1544 continue; 1545 } 1546 1547 if (r.fullscreen) { 1548 // Stack isn't translucent if it has at least one fullscreen activity 1549 // that is visible. 1550 return false; 1551 } 1552 1553 if (!isHomeStack() && r.frontOfTask 1554 && task.isOverHomeStack() && stackBehindId != HOME_STACK_ID) { 1555 // Stack isn't translucent if it's top activity should have the home stack 1556 // behind it and the stack currently behind it isn't the home stack. 1557 return false; 1558 } 1559 } 1560 } 1561 return true; 1562 } 1563 1564 /** 1565 * Returns stack's visibility: {@link #STACK_INVISIBLE}, {@link #STACK_VISIBLE} or 1566 * {@link #STACK_VISIBLE_ACTIVITY_BEHIND}. 1567 * @param starting The currently starting activity or null if there is none. 1568 */ 1569 int getStackVisibilityLocked(ActivityRecord starting) { 1570 if (!isAttached()) { 1571 return STACK_INVISIBLE; 1572 } 1573 1574 if (mStackSupervisor.isFrontStack(this) || mStackSupervisor.isFocusedStack(this)) { 1575 return STACK_VISIBLE; 1576 } 1577 1578 final int stackIndex = mStacks.indexOf(this); 1579 1580 if (stackIndex == mStacks.size() - 1) { 1581 Slog.wtf(TAG, 1582 "Stack=" + this + " isn't front stack but is at the top of the stack list"); 1583 return STACK_INVISIBLE; 1584 } 1585 1586 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 1587 if (isLockscreenShown && !StackId.isAllowedOverLockscreen(mStackId)) { 1588 return STACK_INVISIBLE; 1589 } 1590 1591 final ActivityStack focusedStack = mStackSupervisor.getFocusedStack(); 1592 final int focusedStackId = focusedStack.mStackId; 1593 1594 if (mStackId == FULLSCREEN_WORKSPACE_STACK_ID 1595 && hasVisibleBehindActivity() && focusedStackId == HOME_STACK_ID 1596 && !focusedStack.topActivity().fullscreen) { 1597 // The fullscreen stack should be visible if it has a visible behind activity behind 1598 // the home stack that is translucent. 1599 return STACK_VISIBLE_ACTIVITY_BEHIND; 1600 } 1601 1602 if (mStackId == DOCKED_STACK_ID) { 1603 // Docked stack is always visible, except in the case where the top running activity 1604 // task in the focus stack doesn't support any form of resizing but we show it for the 1605 // home task even though it's not resizable. 1606 final ActivityRecord r = focusedStack.topRunningActivityLocked(); 1607 final TaskRecord task = r != null ? r.task : null; 1608 return task == null || task.canGoInDockedStack() || task.isHomeTask() ? STACK_VISIBLE 1609 : STACK_INVISIBLE; 1610 } 1611 1612 // Find the first stack behind focused stack that actually got something visible. 1613 int stackBehindFocusedIndex = mStacks.indexOf(focusedStack) - 1; 1614 while (stackBehindFocusedIndex >= 0 && 1615 mStacks.get(stackBehindFocusedIndex).topRunningActivityLocked() == null) { 1616 stackBehindFocusedIndex--; 1617 } 1618 if ((focusedStackId == DOCKED_STACK_ID || focusedStackId == PINNED_STACK_ID) 1619 && stackIndex == stackBehindFocusedIndex) { 1620 // Stacks directly behind the docked or pinned stack are always visible. 1621 return STACK_VISIBLE; 1622 } 1623 1624 final int stackBehindFocusedId = (stackBehindFocusedIndex >= 0) 1625 ? mStacks.get(stackBehindFocusedIndex).mStackId : INVALID_STACK_ID; 1626 1627 if (focusedStackId == FULLSCREEN_WORKSPACE_STACK_ID 1628 && focusedStack.isStackTranslucent(starting, stackBehindFocusedId)) { 1629 // Stacks behind the fullscreen stack with a translucent activity are always 1630 // visible so they can act as a backdrop to the translucent activity. 1631 // For example, dialog activities 1632 if (stackIndex == stackBehindFocusedIndex) { 1633 return STACK_VISIBLE; 1634 } 1635 if (stackBehindFocusedIndex >= 0) { 1636 if ((stackBehindFocusedId == DOCKED_STACK_ID 1637 || stackBehindFocusedId == PINNED_STACK_ID) 1638 && stackIndex == (stackBehindFocusedIndex - 1)) { 1639 // The stack behind the docked or pinned stack is also visible so we can have a 1640 // complete backdrop to the translucent activity when the docked stack is up. 1641 return STACK_VISIBLE; 1642 } 1643 } 1644 } 1645 1646 if (StackId.isStaticStack(mStackId)) { 1647 // Visibility of any static stack should have been determined by the conditions above. 1648 return STACK_INVISIBLE; 1649 } 1650 1651 for (int i = stackIndex + 1; i < mStacks.size(); i++) { 1652 final ActivityStack stack = mStacks.get(i); 1653 1654 if (!stack.mFullscreen && !stack.hasFullscreenTask()) { 1655 continue; 1656 } 1657 1658 if (!StackId.isDynamicStacksVisibleBehindAllowed(stack.mStackId)) { 1659 // These stacks can't have any dynamic stacks visible behind them. 1660 return STACK_INVISIBLE; 1661 } 1662 1663 if (!stack.isStackTranslucent(starting, INVALID_STACK_ID)) { 1664 return STACK_INVISIBLE; 1665 } 1666 } 1667 1668 return STACK_VISIBLE; 1669 } 1670 1671 final int rankTaskLayers(int baseLayer) { 1672 int layer = 0; 1673 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1674 final TaskRecord task = mTaskHistory.get(taskNdx); 1675 ActivityRecord r = task.topRunningActivityLocked(); 1676 if (r == null || r.finishing || !r.visible) { 1677 task.mLayerRank = -1; 1678 } else { 1679 task.mLayerRank = baseLayer + layer++; 1680 } 1681 } 1682 return layer; 1683 } 1684 1685 /** 1686 * Make sure that all activities that need to be visible (that is, they 1687 * currently can be seen by the user) actually are. 1688 */ 1689 final void ensureActivitiesVisibleLocked(ActivityRecord starting, int configChanges, 1690 boolean preserveWindows) { 1691 ActivityRecord top = topRunningActivityLocked(); 1692 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "ensureActivitiesVisible behind " + top 1693 + " configChanges=0x" + Integer.toHexString(configChanges)); 1694 if (top != null) { 1695 checkTranslucentActivityWaiting(top); 1696 } 1697 1698 // If the top activity is not fullscreen, then we need to 1699 // make sure any activities under it are now visible. 1700 boolean aboveTop = top != null; 1701 final int stackVisibility = getStackVisibilityLocked(starting); 1702 final boolean stackInvisible = stackVisibility != STACK_VISIBLE; 1703 final boolean stackVisibleBehind = stackVisibility == STACK_VISIBLE_ACTIVITY_BEHIND; 1704 boolean behindFullscreenActivity = stackInvisible; 1705 boolean resumeNextActivity = isFocusable() && (isInStackLocked(starting) == null); 1706 boolean behindTranslucentActivity = false; 1707 final ActivityRecord visibleBehind = getVisibleBehindActivity(); 1708 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1709 final TaskRecord task = mTaskHistory.get(taskNdx); 1710 final ArrayList<ActivityRecord> activities = task.mActivities; 1711 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1712 final ActivityRecord r = activities.get(activityNdx); 1713 if (r.finishing) { 1714 // Normally the screenshot will be taken in makeInvisible(). When an activity 1715 // is finishing, we no longer change its visibility, but we still need to take 1716 // the screenshots if startPausingLocked decided it should be taken. 1717 if (r.mUpdateTaskThumbnailWhenHidden) { 1718 r.updateThumbnailLocked(screenshotActivitiesLocked(r), null); 1719 r.mUpdateTaskThumbnailWhenHidden = false; 1720 } 1721 continue; 1722 } 1723 final boolean isTop = r == top; 1724 if (aboveTop && !isTop) { 1725 continue; 1726 } 1727 aboveTop = false; 1728 1729 if (shouldBeVisible(r, behindTranslucentActivity, stackVisibleBehind, 1730 visibleBehind, behindFullscreenActivity)) { 1731 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make visible? " + r 1732 + " finishing=" + r.finishing + " state=" + r.state); 1733 // First: if this is not the current activity being started, make 1734 // sure it matches the current configuration. 1735 if (r != starting) { 1736 ensureActivityConfigurationLocked(r, 0, preserveWindows); 1737 } 1738 1739 if (r.app == null || r.app.thread == null) { 1740 if (makeVisibleAndRestartIfNeeded(starting, configChanges, isTop, 1741 resumeNextActivity, r)) { 1742 if (activityNdx >= activities.size()) { 1743 // Record may be removed if its process needs to restart. 1744 activityNdx = activities.size() - 1; 1745 } else { 1746 resumeNextActivity = false; 1747 } 1748 } 1749 } else if (r.visible) { 1750 // If this activity is already visible, then there is nothing to do here. 1751 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1752 "Skipping: already visible at " + r); 1753 1754 if (handleAlreadyVisible(r)) { 1755 resumeNextActivity = false; 1756 } 1757 } else { 1758 makeVisibleIfNeeded(starting, r); 1759 } 1760 // Aggregate current change flags. 1761 configChanges |= r.configChangeFlags; 1762 behindFullscreenActivity = updateBehindFullscreen(stackInvisible, 1763 behindFullscreenActivity, task, r); 1764 if (behindFullscreenActivity && !r.fullscreen) { 1765 behindTranslucentActivity = true; 1766 } 1767 } else { 1768 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Make invisible? " + r 1769 + " finishing=" + r.finishing + " state=" + r.state + " stackInvisible=" 1770 + stackInvisible + " behindFullscreenActivity=" 1771 + behindFullscreenActivity + " mLaunchTaskBehind=" 1772 + r.mLaunchTaskBehind); 1773 makeInvisible(r, visibleBehind); 1774 } 1775 } 1776 if (mStackId == FREEFORM_WORKSPACE_STACK_ID) { 1777 // The visibility of tasks and the activities they contain in freeform stack are 1778 // determined individually unlike other stacks where the visibility or fullscreen 1779 // status of an activity in a previous task affects other. 1780 behindFullscreenActivity = stackVisibility == STACK_INVISIBLE; 1781 } else if (mStackId == HOME_STACK_ID) { 1782 if (task.isHomeTask()) { 1783 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Home task: at " + task 1784 + " stackInvisible=" + stackInvisible 1785 + " behindFullscreenActivity=" + behindFullscreenActivity); 1786 // No other task in the home stack should be visible behind the home activity. 1787 // Home activities is usually a translucent activity with the wallpaper behind 1788 // them. However, when they don't have the wallpaper behind them, we want to 1789 // show activities in the next application stack behind them vs. another 1790 // task in the home stack like recents. 1791 behindFullscreenActivity = true; 1792 } else if (task.isRecentsTask() 1793 && task.getTaskToReturnTo() == APPLICATION_ACTIVITY_TYPE) { 1794 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1795 "Recents task returning to app: at " + task 1796 + " stackInvisible=" + stackInvisible 1797 + " behindFullscreenActivity=" + behindFullscreenActivity); 1798 // We don't want any other tasks in the home stack visible if the recents 1799 // activity is going to be returning to an application activity type. 1800 // We do this to preserve the visible order the user used to get into the 1801 // recents activity. The recents activity is normally translucent and if it 1802 // doesn't have the wallpaper behind it the next activity in the home stack 1803 // shouldn't be visible when the home stack is brought to the front to display 1804 // the recents activity from an app. 1805 behindFullscreenActivity = true; 1806 } 1807 1808 } 1809 } 1810 1811 if (mTranslucentActivityWaiting != null && 1812 mUndrawnActivitiesBelowTopTranslucent.isEmpty()) { 1813 // Nothing is getting drawn or everything was already visible, don't wait for timeout. 1814 notifyActivityDrawnLocked(null); 1815 } 1816 } 1817 1818 /** Return true if the input activity should be made visible */ 1819 private boolean shouldBeVisible(ActivityRecord r, boolean behindTranslucentActivity, 1820 boolean stackVisibleBehind, ActivityRecord visibleBehind, 1821 boolean behindFullscreenActivity) { 1822 1823 if (!okToShowLocked(r)) { 1824 return false; 1825 } 1826 1827 // mLaunchingBehind: Activities launching behind are at the back of the task stack 1828 // but must be drawn initially for the animation as though they were visible. 1829 final boolean activityVisibleBehind = 1830 (behindTranslucentActivity || stackVisibleBehind) && visibleBehind == r; 1831 1832 boolean isVisible = 1833 !behindFullscreenActivity || r.mLaunchTaskBehind || activityVisibleBehind; 1834 1835 if (mService.mSupportsLeanbackOnly && isVisible && r.isRecentsActivity()) { 1836 // On devices that support leanback only (Android TV), Recents activity can only be 1837 // visible if the home stack is the focused stack or we are in split-screen mode. 1838 isVisible = mStackSupervisor.getStack(DOCKED_STACK_ID) != null 1839 || mStackSupervisor.isFocusedStack(this); 1840 } 1841 1842 return isVisible; 1843 } 1844 1845 private void checkTranslucentActivityWaiting(ActivityRecord top) { 1846 if (mTranslucentActivityWaiting != top) { 1847 mUndrawnActivitiesBelowTopTranslucent.clear(); 1848 if (mTranslucentActivityWaiting != null) { 1849 // Call the callback with a timeout indication. 1850 notifyActivityDrawnLocked(null); 1851 mTranslucentActivityWaiting = null; 1852 } 1853 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 1854 } 1855 } 1856 1857 private boolean makeVisibleAndRestartIfNeeded(ActivityRecord starting, int configChanges, 1858 boolean isTop, boolean andResume, ActivityRecord r) { 1859 // We need to make sure the app is running if it's the top, or it is just made visible from 1860 // invisible. If the app is already visible, it must have died while it was visible. In this 1861 // case, we'll show the dead window but will not restart the app. Otherwise we could end up 1862 // thrashing. 1863 if (isTop || !r.visible) { 1864 // This activity needs to be visible, but isn't even running... 1865 // get it started and resume if no other stack in this stack is resumed. 1866 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Start and freeze screen for " + r); 1867 if (r != starting) { 1868 r.startFreezingScreenLocked(r.app, configChanges); 1869 } 1870 if (!r.visible || r.mLaunchTaskBehind) { 1871 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Starting and making visible: " + r); 1872 setVisible(r, true); 1873 } 1874 if (r != starting) { 1875 mStackSupervisor.startSpecificActivityLocked(r, andResume, false); 1876 return true; 1877 } 1878 } 1879 return false; 1880 } 1881 1882 private void makeInvisible(ActivityRecord r, ActivityRecord visibleBehind) { 1883 if (!r.visible) { 1884 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + r); 1885 return; 1886 } 1887 // Now for any activities that aren't visible to the user, make sure they no longer are 1888 // keeping the screen frozen. 1889 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Making invisible: " + r + " " + r.state); 1890 try { 1891 setVisible(r, false); 1892 switch (r.state) { 1893 case STOPPING: 1894 case STOPPED: 1895 if (r.app != null && r.app.thread != null) { 1896 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1897 "Scheduling invisibility: " + r); 1898 r.app.thread.scheduleWindowVisibility(r.appToken, false); 1899 } 1900 break; 1901 1902 case INITIALIZING: 1903 case RESUMED: 1904 case PAUSING: 1905 case PAUSED: 1906 // This case created for transitioning activities from 1907 // translucent to opaque {@link Activity#convertToOpaque}. 1908 if (visibleBehind == r) { 1909 releaseBackgroundResources(r); 1910 } else { 1911 addToStopping(r, true /* immediate */); 1912 } 1913 break; 1914 1915 default: 1916 break; 1917 } 1918 } catch (Exception e) { 1919 // Just skip on any failure; we'll make it visible when it next restarts. 1920 Slog.w(TAG, "Exception thrown making hidden: " + r.intent.getComponent(), e); 1921 } 1922 } 1923 1924 private boolean updateBehindFullscreen(boolean stackInvisible, boolean behindFullscreenActivity, 1925 TaskRecord task, ActivityRecord r) { 1926 if (r.fullscreen) { 1927 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Fullscreen: at " + r 1928 + " stackInvisible=" + stackInvisible 1929 + " behindFullscreenActivity=" + behindFullscreenActivity); 1930 // At this point, nothing else needs to be shown in this task. 1931 behindFullscreenActivity = true; 1932 } else if (!isHomeStack() && r.frontOfTask && task.isOverHomeStack()) { 1933 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Showing home: at " + r 1934 + " stackInvisible=" + stackInvisible 1935 + " behindFullscreenActivity=" + behindFullscreenActivity); 1936 behindFullscreenActivity = true; 1937 } 1938 return behindFullscreenActivity; 1939 } 1940 1941 private void makeVisibleIfNeeded(ActivityRecord starting, ActivityRecord r) { 1942 1943 // This activity is not currently visible, but is running. Tell it to become visible. 1944 if (r.state == ActivityState.RESUMED || r == starting) { 1945 if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY, 1946 "Not making visible, r=" + r + " state=" + r.state + " starting=" + starting); 1947 return; 1948 } 1949 1950 // If this activity is paused, tell it to now show its window. 1951 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 1952 "Making visible and scheduling visibility: " + r); 1953 try { 1954 if (mTranslucentActivityWaiting != null) { 1955 r.updateOptionsLocked(r.returningOptions); 1956 mUndrawnActivitiesBelowTopTranslucent.add(r); 1957 } 1958 setVisible(r, true); 1959 r.sleeping = false; 1960 r.app.pendingUiClean = true; 1961 r.app.thread.scheduleWindowVisibility(r.appToken, true); 1962 // The activity may be waiting for stop, but that is no longer 1963 // appropriate for it. 1964 mStackSupervisor.mStoppingActivities.remove(r); 1965 mStackSupervisor.mGoingToSleepActivities.remove(r); 1966 } catch (Exception e) { 1967 // Just skip on any failure; we'll make it 1968 // visible when it next restarts. 1969 Slog.w(TAG, "Exception thrown making visibile: " + r.intent.getComponent(), e); 1970 } 1971 handleAlreadyVisible(r); 1972 } 1973 1974 private boolean handleAlreadyVisible(ActivityRecord r) { 1975 r.stopFreezingScreenLocked(false); 1976 try { 1977 if (r.returningOptions != null) { 1978 r.app.thread.scheduleOnNewActivityOptions(r.appToken, r.returningOptions); 1979 } 1980 } catch(RemoteException e) { 1981 } 1982 return r.state == ActivityState.RESUMED; 1983 } 1984 1985 void convertActivityToTranslucent(ActivityRecord r) { 1986 mTranslucentActivityWaiting = r; 1987 mUndrawnActivitiesBelowTopTranslucent.clear(); 1988 mHandler.sendEmptyMessageDelayed(TRANSLUCENT_TIMEOUT_MSG, TRANSLUCENT_CONVERSION_TIMEOUT); 1989 } 1990 1991 void clearOtherAppTimeTrackers(AppTimeTracker except) { 1992 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 1993 final TaskRecord task = mTaskHistory.get(taskNdx); 1994 final ArrayList<ActivityRecord> activities = task.mActivities; 1995 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 1996 final ActivityRecord r = activities.get(activityNdx); 1997 if ( r.appTimeTracker != except) { 1998 r.appTimeTracker = null; 1999 } 2000 } 2001 } 2002 } 2003 2004 /** 2005 * Called as activities below the top translucent activity are redrawn. When the last one is 2006 * redrawn notify the top activity by calling 2007 * {@link Activity#onTranslucentConversionComplete}. 2008 * 2009 * @param r The most recent background activity to be drawn. Or, if r is null then a timeout 2010 * occurred and the activity will be notified immediately. 2011 */ 2012 void notifyActivityDrawnLocked(ActivityRecord r) { 2013 mActivityContainer.setDrawn(); 2014 if ((r == null) 2015 || (mUndrawnActivitiesBelowTopTranslucent.remove(r) && 2016 mUndrawnActivitiesBelowTopTranslucent.isEmpty())) { 2017 // The last undrawn activity below the top has just been drawn. If there is an 2018 // opaque activity at the top, notify it that it can become translucent safely now. 2019 final ActivityRecord waitingActivity = mTranslucentActivityWaiting; 2020 mTranslucentActivityWaiting = null; 2021 mUndrawnActivitiesBelowTopTranslucent.clear(); 2022 mHandler.removeMessages(TRANSLUCENT_TIMEOUT_MSG); 2023 2024 if (waitingActivity != null) { 2025 mWindowManager.setWindowOpaque(waitingActivity.appToken, false); 2026 if (waitingActivity.app != null && waitingActivity.app.thread != null) { 2027 try { 2028 waitingActivity.app.thread.scheduleTranslucentConversionComplete( 2029 waitingActivity.appToken, r != null); 2030 } catch (RemoteException e) { 2031 } 2032 } 2033 } 2034 } 2035 } 2036 2037 /** If any activities below the top running one are in the INITIALIZING state and they have a 2038 * starting window displayed then remove that starting window. It is possible that the activity 2039 * in this state will never resumed in which case that starting window will be orphaned. */ 2040 void cancelInitializingActivities() { 2041 final ActivityRecord topActivity = topRunningActivityLocked(); 2042 boolean aboveTop = true; 2043 // We don't want to clear starting window for activities that aren't behind fullscreen 2044 // activities as we need to display their starting window until they are done initializing. 2045 boolean behindFullscreenActivity = false; 2046 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2047 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 2048 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 2049 final ActivityRecord r = activities.get(activityNdx); 2050 if (aboveTop) { 2051 if (r == topActivity) { 2052 aboveTop = false; 2053 } 2054 behindFullscreenActivity |= r.fullscreen; 2055 continue; 2056 } 2057 2058 if (r.state == ActivityState.INITIALIZING 2059 && r.mStartingWindowState == STARTING_WINDOW_SHOWN 2060 && behindFullscreenActivity) { 2061 if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, 2062 "Found orphaned starting window " + r); 2063 r.mStartingWindowState = STARTING_WINDOW_REMOVED; 2064 mWindowManager.removeAppStartingWindow(r.appToken); 2065 } 2066 2067 behindFullscreenActivity |= r.fullscreen; 2068 } 2069 } 2070 } 2071 2072 /** 2073 * Ensure that the top activity in the stack is resumed. 2074 * 2075 * @param prev The previously resumed activity, for when in the process 2076 * of pausing; can be null to call from elsewhere. 2077 * @param options Activity options. 2078 * 2079 * @return Returns true if something is being resumed, or false if 2080 * nothing happened. 2081 * 2082 * NOTE: It is not safe to call this method directly as it can cause an activity in a 2083 * non-focused stack to be resumed. 2084 * Use {@link ActivityStackSupervisor#resumeFocusedStackTopActivityLocked} to resume the 2085 * right activity for the current system state. 2086 */ 2087 boolean resumeTopActivityUncheckedLocked(ActivityRecord prev, ActivityOptions options) { 2088 if (mStackSupervisor.inResumeTopActivity) { 2089 // Don't even start recursing. 2090 return false; 2091 } 2092 2093 boolean result = false; 2094 try { 2095 // Protect against recursion. 2096 mStackSupervisor.inResumeTopActivity = true; 2097 if (mService.mLockScreenShown == ActivityManagerService.LOCK_SCREEN_LEAVING) { 2098 mService.mLockScreenShown = ActivityManagerService.LOCK_SCREEN_HIDDEN; 2099 mService.updateSleepIfNeededLocked(); 2100 } 2101 result = resumeTopActivityInnerLocked(prev, options); 2102 } finally { 2103 mStackSupervisor.inResumeTopActivity = false; 2104 } 2105 return result; 2106 } 2107 2108 private boolean resumeTopActivityInnerLocked(ActivityRecord prev, ActivityOptions options) { 2109 if (DEBUG_LOCKSCREEN) mService.logLockScreen(""); 2110 2111 if (!mService.mBooting && !mService.mBooted) { 2112 // Not ready yet! 2113 return false; 2114 } 2115 2116 ActivityRecord parent = mActivityContainer.mParentActivity; 2117 if ((parent != null && parent.state != ActivityState.RESUMED) || 2118 !mActivityContainer.isAttachedLocked()) { 2119 // Do not resume this stack if its parent is not resumed. 2120 // TODO: If in a loop, make sure that parent stack resumeTopActivity is called 1st. 2121 return false; 2122 } 2123 2124 mStackSupervisor.cancelInitializingActivities(); 2125 2126 // Find the first activity that is not finishing. 2127 final ActivityRecord next = topRunningActivityLocked(); 2128 2129 // Remember how we'll process this pause/resume situation, and ensure 2130 // that the state is reset however we wind up proceeding. 2131 final boolean userLeaving = mStackSupervisor.mUserLeaving; 2132 mStackSupervisor.mUserLeaving = false; 2133 2134 final TaskRecord prevTask = prev != null ? prev.task : null; 2135 if (next == null) { 2136 // There are no more activities! 2137 final String reason = "noMoreActivities"; 2138 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() 2139 ? HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2140 if (!mFullscreen && adjustFocusToNextFocusableStackLocked(returnTaskType, reason)) { 2141 // Try to move focus to the next visible stack with a running activity if this 2142 // stack is not covering the entire screen. 2143 return mStackSupervisor.resumeFocusedStackTopActivityLocked( 2144 mStackSupervisor.getFocusedStack(), prev, null); 2145 } 2146 2147 // Let's just start up the Launcher... 2148 ActivityOptions.abort(options); 2149 if (DEBUG_STATES) Slog.d(TAG_STATES, 2150 "resumeTopActivityLocked: No more activities go home"); 2151 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2152 // Only resume home if on home display 2153 return isOnHomeDisplay() && 2154 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, reason); 2155 } 2156 2157 next.delayedResume = false; 2158 2159 // If the top activity is the resumed one, nothing to do. 2160 if (mResumedActivity == next && next.state == ActivityState.RESUMED && 2161 mStackSupervisor.allResumedActivitiesComplete()) { 2162 // Make sure we have executed any pending transitions, since there 2163 // should be nothing left to do at this point. 2164 mWindowManager.executeAppTransition(); 2165 mNoAnimActivities.clear(); 2166 ActivityOptions.abort(options); 2167 if (DEBUG_STATES) Slog.d(TAG_STATES, 2168 "resumeTopActivityLocked: Top activity resumed " + next); 2169 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2170 return false; 2171 } 2172 2173 final TaskRecord nextTask = next.task; 2174 if (prevTask != null && prevTask.stack == this && 2175 prevTask.isOverHomeStack() && prev.finishing && prev.frontOfTask) { 2176 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2177 if (prevTask == nextTask) { 2178 prevTask.setFrontOfTask(); 2179 } else if (prevTask != topTask()) { 2180 // This task is going away but it was supposed to return to the home stack. 2181 // Now the task above it has to return to the home task instead. 2182 final int taskNdx = mTaskHistory.indexOf(prevTask) + 1; 2183 mTaskHistory.get(taskNdx).setTaskToReturnTo(HOME_ACTIVITY_TYPE); 2184 } else if (!isOnHomeDisplay()) { 2185 return false; 2186 } else if (!isHomeStack()){ 2187 if (DEBUG_STATES) Slog.d(TAG_STATES, 2188 "resumeTopActivityLocked: Launching home next"); 2189 final int returnTaskType = prevTask == null || !prevTask.isOverHomeStack() ? 2190 HOME_ACTIVITY_TYPE : prevTask.getTaskToReturnTo(); 2191 return isOnHomeDisplay() && 2192 mStackSupervisor.resumeHomeStackTask(returnTaskType, prev, "prevFinished"); 2193 } 2194 } 2195 2196 // If we are sleeping, and there is no resumed activity, and the top 2197 // activity is paused, well that is the state we want. 2198 if (mService.isSleepingOrShuttingDown() 2199 && mLastPausedActivity == next 2200 && mStackSupervisor.allPausedActivitiesComplete()) { 2201 // Make sure we have executed any pending transitions, since there 2202 // should be nothing left to do at this point. 2203 mWindowManager.executeAppTransition(); 2204 mNoAnimActivities.clear(); 2205 ActivityOptions.abort(options); 2206 if (DEBUG_STATES) Slog.d(TAG_STATES, 2207 "resumeTopActivityLocked: Going to sleep and all paused"); 2208 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2209 return false; 2210 } 2211 2212 // Make sure that the user who owns this activity is started. If not, 2213 // we will just leave it as is because someone should be bringing 2214 // another user's activities to the top of the stack. 2215 if (!mService.mUserController.hasStartedUserState(next.userId)) { 2216 Slog.w(TAG, "Skipping resume of top activity " + next 2217 + ": user " + next.userId + " is stopped"); 2218 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2219 return false; 2220 } 2221 2222 // The activity may be waiting for stop, but that is no longer 2223 // appropriate for it. 2224 mStackSupervisor.mStoppingActivities.remove(next); 2225 mStackSupervisor.mGoingToSleepActivities.remove(next); 2226 next.sleeping = false; 2227 mStackSupervisor.mWaitingVisibleActivities.remove(next); 2228 2229 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resuming " + next); 2230 2231 // If we are currently pausing an activity, then don't do anything until that is done. 2232 if (!mStackSupervisor.allPausedActivitiesComplete()) { 2233 if (DEBUG_SWITCH || DEBUG_PAUSE || DEBUG_STATES) Slog.v(TAG_PAUSE, 2234 "resumeTopActivityLocked: Skip resume: some activity pausing."); 2235 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2236 return false; 2237 } 2238 2239 mStackSupervisor.setLaunchSource(next.info.applicationInfo.uid); 2240 2241 // We need to start pausing the current activity so the top one can be resumed... 2242 final boolean dontWaitForPause = (next.info.flags & FLAG_RESUME_WHILE_PAUSING) != 0; 2243 boolean pausing = mStackSupervisor.pauseBackStacks(userLeaving, true, dontWaitForPause); 2244 if (mResumedActivity != null) { 2245 if (DEBUG_STATES) Slog.d(TAG_STATES, 2246 "resumeTopActivityLocked: Pausing " + mResumedActivity); 2247 pausing |= startPausingLocked(userLeaving, false, true, dontWaitForPause); 2248 } 2249 if (pausing) { 2250 if (DEBUG_SWITCH || DEBUG_STATES) Slog.v(TAG_STATES, 2251 "resumeTopActivityLocked: Skip resume: need to start pausing"); 2252 // At this point we want to put the upcoming activity's process 2253 // at the top of the LRU list, since we know we will be needing it 2254 // very soon and it would be a waste to let it get killed if it 2255 // happens to be sitting towards the end. 2256 if (next.app != null && next.app.thread != null) { 2257 mService.updateLruProcessLocked(next.app, true, null); 2258 } 2259 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2260 return true; 2261 } else if (mResumedActivity == next && next.state == ActivityState.RESUMED && 2262 mStackSupervisor.allResumedActivitiesComplete()) { 2263 // It is possible for the activity to be resumed when we paused back stacks above if the 2264 // next activity doesn't have to wait for pause to complete. 2265 // So, nothing else to-do except: 2266 // Make sure we have executed any pending transitions, since there 2267 // should be nothing left to do at this point. 2268 mWindowManager.executeAppTransition(); 2269 mNoAnimActivities.clear(); 2270 ActivityOptions.abort(options); 2271 if (DEBUG_STATES) Slog.d(TAG_STATES, 2272 "resumeTopActivityLocked: Top activity resumed (dontWaitForPause) " + next); 2273 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2274 return true; 2275 } 2276 2277 // If the most recent activity was noHistory but was only stopped rather 2278 // than stopped+finished because the device went to sleep, we need to make 2279 // sure to finish it as we're making a new activity topmost. 2280 if (mService.isSleeping() && mLastNoHistoryActivity != null && 2281 !mLastNoHistoryActivity.finishing) { 2282 if (DEBUG_STATES) Slog.d(TAG_STATES, 2283 "no-history finish of " + mLastNoHistoryActivity + " on new resume"); 2284 requestFinishActivityLocked(mLastNoHistoryActivity.appToken, Activity.RESULT_CANCELED, 2285 null, "resume-no-history", false); 2286 mLastNoHistoryActivity = null; 2287 } 2288 2289 if (prev != null && prev != next) { 2290 if (!mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2291 && next != null && !next.nowVisible) { 2292 mStackSupervisor.mWaitingVisibleActivities.add(prev); 2293 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2294 "Resuming top, waiting visible to hide: " + prev); 2295 } else { 2296 // The next activity is already visible, so hide the previous 2297 // activity's windows right now so we can show the new one ASAP. 2298 // We only do this if the previous is finishing, which should mean 2299 // it is on top of the one being resumed so hiding it quickly 2300 // is good. Otherwise, we want to do the normal route of allowing 2301 // the resumed activity to be shown so we can decide if the 2302 // previous should actually be hidden depending on whether the 2303 // new one is found to be full-screen or not. 2304 if (prev.finishing) { 2305 mWindowManager.setAppVisibility(prev.appToken, false); 2306 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2307 "Not waiting for visible to hide: " + prev + ", waitingVisible=" 2308 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2309 + ", nowVisible=" + next.nowVisible); 2310 } else { 2311 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 2312 "Previous already visible but still waiting to hide: " + prev 2313 + ", waitingVisible=" 2314 + mStackSupervisor.mWaitingVisibleActivities.contains(prev) 2315 + ", nowVisible=" + next.nowVisible); 2316 } 2317 } 2318 } 2319 2320 // Launching this app's activity, make sure the app is no longer 2321 // considered stopped. 2322 try { 2323 AppGlobals.getPackageManager().setPackageStoppedState( 2324 next.packageName, false, next.userId); /* TODO: Verify if correct userid */ 2325 } catch (RemoteException e1) { 2326 } catch (IllegalArgumentException e) { 2327 Slog.w(TAG, "Failed trying to unstop package " 2328 + next.packageName + ": " + e); 2329 } 2330 2331 // We are starting up the next activity, so tell the window manager 2332 // that the previous one will be hidden soon. This way it can know 2333 // to ignore it when computing the desired screen orientation. 2334 boolean anim = true; 2335 if (prev != null) { 2336 if (prev.finishing) { 2337 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2338 "Prepare close transition: prev=" + prev); 2339 if (mNoAnimActivities.contains(prev)) { 2340 anim = false; 2341 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2342 } else { 2343 mWindowManager.prepareAppTransition(prev.task == next.task 2344 ? TRANSIT_ACTIVITY_CLOSE 2345 : TRANSIT_TASK_CLOSE, false); 2346 } 2347 mWindowManager.setAppVisibility(prev.appToken, false); 2348 } else { 2349 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2350 "Prepare open transition: prev=" + prev); 2351 if (mNoAnimActivities.contains(next)) { 2352 anim = false; 2353 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2354 } else { 2355 mWindowManager.prepareAppTransition(prev.task == next.task 2356 ? TRANSIT_ACTIVITY_OPEN 2357 : next.mLaunchTaskBehind 2358 ? TRANSIT_TASK_OPEN_BEHIND 2359 : TRANSIT_TASK_OPEN, false); 2360 } 2361 } 2362 } else { 2363 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare open transition: no previous"); 2364 if (mNoAnimActivities.contains(next)) { 2365 anim = false; 2366 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 2367 } else { 2368 mWindowManager.prepareAppTransition(TRANSIT_ACTIVITY_OPEN, false); 2369 } 2370 } 2371 2372 Bundle resumeAnimOptions = null; 2373 if (anim) { 2374 ActivityOptions opts = next.getOptionsForTargetActivityLocked(); 2375 if (opts != null) { 2376 resumeAnimOptions = opts.toBundle(); 2377 } 2378 next.applyOptionsLocked(); 2379 } else { 2380 next.clearOptionsLocked(); 2381 } 2382 2383 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2384 if (next.app != null && next.app.thread != null) { 2385 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Resume running: " + next 2386 + " stopped=" + next.stopped + " visible=" + next.visible); 2387 2388 // If the previous activity is translucent, force a visibility update of 2389 // the next activity, so that it's added to WM's opening app list, and 2390 // transition animation can be set up properly. 2391 // For example, pressing Home button with a translucent activity in focus. 2392 // Launcher is already visible in this case. If we don't add it to opening 2393 // apps, maybeUpdateTransitToWallpaper() will fail to identify this as a 2394 // TRANSIT_WALLPAPER_OPEN animation, and run some funny animation. 2395 final boolean lastActivityTranslucent = lastStack != null 2396 && (!lastStack.mFullscreen 2397 || (lastStack.mLastPausedActivity != null 2398 && !lastStack.mLastPausedActivity.fullscreen)); 2399 2400 // This activity is now becoming visible. 2401 if (!next.visible || next.stopped || lastActivityTranslucent) { 2402 mWindowManager.setAppVisibility(next.appToken, true); 2403 } 2404 2405 // schedule launch ticks to collect information about slow apps. 2406 next.startLaunchTickingLocked(); 2407 2408 ActivityRecord lastResumedActivity = 2409 lastStack == null ? null :lastStack.mResumedActivity; 2410 ActivityState lastState = next.state; 2411 2412 mService.updateCpuStats(); 2413 2414 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to RESUMED: " + next + " (in existing)"); 2415 next.state = ActivityState.RESUMED; 2416 mResumedActivity = next; 2417 next.task.touchActiveTime(); 2418 mRecentTasks.addLocked(next.task); 2419 mService.updateLruProcessLocked(next.app, true, null); 2420 updateLRUListLocked(next); 2421 mService.updateOomAdjLocked(); 2422 2423 // Have the window manager re-evaluate the orientation of 2424 // the screen based on the new activity order. 2425 boolean notUpdated = true; 2426 if (mStackSupervisor.isFocusedStack(this)) { 2427 Configuration config = mWindowManager.updateOrientationFromAppTokens( 2428 mService.mConfiguration, 2429 next.mayFreezeScreenLocked(next.app) ? next.appToken : null); 2430 if (config != null) { 2431 next.frozenBeforeDestroy = true; 2432 } 2433 notUpdated = !mService.updateConfigurationLocked(config, next, false); 2434 } 2435 2436 if (notUpdated) { 2437 // The configuration update wasn't able to keep the existing 2438 // instance of the activity, and instead started a new one. 2439 // We should be all done, but let's just make sure our activity 2440 // is still at the top and schedule another run if something 2441 // weird happened. 2442 ActivityRecord nextNext = topRunningActivityLocked(); 2443 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_STATES, 2444 "Activity config changed during resume: " + next 2445 + ", new next: " + nextNext); 2446 if (nextNext != next) { 2447 // Do over! 2448 mStackSupervisor.scheduleResumeTopActivities(); 2449 } 2450 if (mStackSupervisor.reportResumedActivityLocked(next)) { 2451 mNoAnimActivities.clear(); 2452 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2453 return true; 2454 } 2455 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2456 return false; 2457 } 2458 2459 try { 2460 // Deliver all pending results. 2461 ArrayList<ResultInfo> a = next.results; 2462 if (a != null) { 2463 final int N = a.size(); 2464 if (!next.finishing && N > 0) { 2465 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, 2466 "Delivering results to " + next + ": " + a); 2467 next.app.thread.scheduleSendResult(next.appToken, a); 2468 } 2469 } 2470 2471 if (next.newIntents != null) { 2472 next.app.thread.scheduleNewIntent(next.newIntents, next.appToken); 2473 } 2474 2475 // Well the app will no longer be stopped. 2476 // Clear app token stopped state in window manager if needed. 2477 mWindowManager.notifyAppStopped(next.appToken, false); 2478 2479 EventLog.writeEvent(EventLogTags.AM_RESUME_ACTIVITY, next.userId, 2480 System.identityHashCode(next), next.task.taskId, next.shortComponentName); 2481 2482 next.sleeping = false; 2483 mService.showUnsupportedZoomDialogIfNeededLocked(next); 2484 mService.showAskCompatModeDialogLocked(next); 2485 next.app.pendingUiClean = true; 2486 next.app.forceProcessStateUpTo(mService.mTopProcessState); 2487 next.clearOptionsLocked(); 2488 next.app.thread.scheduleResumeActivity(next.appToken, next.app.repProcState, 2489 mService.isNextTransitionForward(), resumeAnimOptions); 2490 2491 mStackSupervisor.checkReadyForSleepLocked(); 2492 2493 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Resumed " + next); 2494 } catch (Exception e) { 2495 // Whoops, need to restart this activity! 2496 if (DEBUG_STATES) Slog.v(TAG_STATES, "Resume failed; resetting state to " 2497 + lastState + ": " + next); 2498 next.state = lastState; 2499 if (lastStack != null) { 2500 lastStack.mResumedActivity = lastResumedActivity; 2501 } 2502 Slog.i(TAG, "Restarting because process died: " + next); 2503 if (!next.hasBeenLaunched) { 2504 next.hasBeenLaunched = true; 2505 } else if (SHOW_APP_STARTING_PREVIEW && lastStack != null && 2506 mStackSupervisor.isFrontStack(lastStack)) { 2507 next.showStartingWindow(null, true); 2508 } 2509 mStackSupervisor.startSpecificActivityLocked(next, true, false); 2510 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2511 return true; 2512 } 2513 2514 // From this point on, if something goes wrong there is no way 2515 // to recover the activity. 2516 try { 2517 completeResumeLocked(next); 2518 } catch (Exception e) { 2519 // If any exception gets thrown, toss away this 2520 // activity and try the next one. 2521 Slog.w(TAG, "Exception thrown during resume of " + next, e); 2522 requestFinishActivityLocked(next.appToken, Activity.RESULT_CANCELED, null, 2523 "resume-exception", true); 2524 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2525 return true; 2526 } 2527 } else { 2528 // Whoops, need to restart this activity! 2529 if (!next.hasBeenLaunched) { 2530 next.hasBeenLaunched = true; 2531 } else { 2532 if (SHOW_APP_STARTING_PREVIEW) { 2533 next.showStartingWindow(null, true); 2534 } 2535 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Restarting: " + next); 2536 } 2537 if (DEBUG_STATES) Slog.d(TAG_STATES, "resumeTopActivityLocked: Restarting " + next); 2538 mStackSupervisor.startSpecificActivityLocked(next, true, true); 2539 } 2540 2541 if (DEBUG_STACK) mStackSupervisor.validateTopActivitiesLocked(); 2542 return true; 2543 } 2544 2545 private TaskRecord getNextTask(TaskRecord targetTask) { 2546 final int index = mTaskHistory.indexOf(targetTask); 2547 if (index >= 0) { 2548 final int numTasks = mTaskHistory.size(); 2549 for (int i = index + 1; i < numTasks; ++i) { 2550 TaskRecord task = mTaskHistory.get(i); 2551 if (task.userId == targetTask.userId) { 2552 return task; 2553 } 2554 } 2555 } 2556 return null; 2557 } 2558 2559 private void insertTaskAtPosition(TaskRecord task, int position) { 2560 if (position >= mTaskHistory.size()) { 2561 insertTaskAtTop(task, null); 2562 return; 2563 } 2564 // Calculate maximum possible position for this task. 2565 int maxPosition = mTaskHistory.size(); 2566 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) 2567 && task.topRunningActivityLocked() == null) { 2568 // Put non-current user tasks below current user tasks. 2569 while (maxPosition > 0) { 2570 final TaskRecord tmpTask = mTaskHistory.get(maxPosition - 1); 2571 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2572 || tmpTask.topRunningActivityLocked() == null) { 2573 break; 2574 } 2575 maxPosition--; 2576 } 2577 } 2578 position = Math.min(position, maxPosition); 2579 mTaskHistory.remove(task); 2580 mTaskHistory.add(position, task); 2581 updateTaskMovement(task, true); 2582 } 2583 2584 private void insertTaskAtTop(TaskRecord task, ActivityRecord newActivity) { 2585 // If the moving task is over home stack, transfer its return type to next task 2586 if (task.isOverHomeStack()) { 2587 final TaskRecord nextTask = getNextTask(task); 2588 if (nextTask != null) { 2589 nextTask.setTaskToReturnTo(task.getTaskToReturnTo()); 2590 } 2591 } 2592 2593 // If this is being moved to the top by another activity or being launched from the home 2594 // activity, set mTaskToReturnTo accordingly. 2595 if (isOnHomeDisplay()) { 2596 ActivityStack lastStack = mStackSupervisor.getLastStack(); 2597 final boolean fromHome = lastStack.isHomeStack(); 2598 if (!isHomeStack() && (fromHome || topTask() != task)) { 2599 int returnToType = APPLICATION_ACTIVITY_TYPE; 2600 if (fromHome && StackId.allowTopTaskToReturnHome(mStackId)) { 2601 returnToType = lastStack.topTask() == null 2602 ? HOME_ACTIVITY_TYPE : lastStack.topTask().taskType; 2603 } 2604 task.setTaskToReturnTo(returnToType); 2605 } 2606 } else { 2607 task.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 2608 } 2609 2610 mTaskHistory.remove(task); 2611 // Now put task at top. 2612 int taskNdx = mTaskHistory.size(); 2613 final boolean notShownWhenLocked = 2614 (newActivity != null && (newActivity.info.flags & FLAG_SHOW_FOR_ALL_USERS) == 0) 2615 || (newActivity == null && task.topRunningActivityLocked() == null); 2616 if (!mStackSupervisor.isCurrentProfileLocked(task.userId) && notShownWhenLocked) { 2617 // Put non-current user tasks below current user tasks. 2618 while (--taskNdx >= 0) { 2619 final TaskRecord tmpTask = mTaskHistory.get(taskNdx); 2620 if (!mStackSupervisor.isCurrentProfileLocked(tmpTask.userId) 2621 || tmpTask.topRunningActivityLocked() == null) { 2622 break; 2623 } 2624 } 2625 ++taskNdx; 2626 } 2627 mTaskHistory.add(taskNdx, task); 2628 updateTaskMovement(task, true); 2629 } 2630 2631 final void startActivityLocked(ActivityRecord r, boolean newTask, boolean keepCurTransition, 2632 ActivityOptions options) { 2633 TaskRecord rTask = r.task; 2634 final int taskId = rTask.taskId; 2635 // mLaunchTaskBehind tasks get placed at the back of the task stack. 2636 if (!r.mLaunchTaskBehind && (taskForIdLocked(taskId) == null || newTask)) { 2637 // Last activity in task had been removed or ActivityManagerService is reusing task. 2638 // Insert or replace. 2639 // Might not even be in. 2640 insertTaskAtTop(rTask, r); 2641 mWindowManager.moveTaskToTop(taskId); 2642 } 2643 TaskRecord task = null; 2644 if (!newTask) { 2645 // If starting in an existing task, find where that is... 2646 boolean startIt = true; 2647 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 2648 task = mTaskHistory.get(taskNdx); 2649 if (task.getTopActivity() == null) { 2650 // All activities in task are finishing. 2651 continue; 2652 } 2653 if (task == r.task) { 2654 // Here it is! Now, if this is not yet visible to the 2655 // user, then just add it without starting; it will 2656 // get started when the user navigates back to it. 2657 if (!startIt) { 2658 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to task " 2659 + task, new RuntimeException("here").fillInStackTrace()); 2660 task.addActivityToTop(r); 2661 r.putInHistory(); 2662 addConfigOverride(r, task); 2663 if (VALIDATE_TOKENS) { 2664 validateAppTokensLocked(); 2665 } 2666 ActivityOptions.abort(options); 2667 return; 2668 } 2669 break; 2670 } else if (task.numFullscreen > 0) { 2671 startIt = false; 2672 } 2673 } 2674 } 2675 2676 // Place a new activity at top of stack, so it is next to interact 2677 // with the user. 2678 2679 // If we are not placing the new activity frontmost, we do not want 2680 // to deliver the onUserLeaving callback to the actual frontmost 2681 // activity 2682 if (task == r.task && mTaskHistory.indexOf(task) != (mTaskHistory.size() - 1)) { 2683 mStackSupervisor.mUserLeaving = false; 2684 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 2685 "startActivity() behind front, mUserLeaving=false"); 2686 } 2687 2688 task = r.task; 2689 2690 // Slot the activity into the history stack and proceed 2691 if (DEBUG_ADD_REMOVE) Slog.i(TAG, "Adding activity " + r + " to stack to task " + task, 2692 new RuntimeException("here").fillInStackTrace()); 2693 task.addActivityToTop(r); 2694 task.setFrontOfTask(); 2695 2696 r.putInHistory(); 2697 if (!isHomeStack() || numActivities() > 0) { 2698 // We want to show the starting preview window if we are 2699 // switching to a new task, or the next activity's process is 2700 // not currently running. 2701 boolean showStartingIcon = newTask; 2702 ProcessRecord proc = r.app; 2703 if (proc == null) { 2704 proc = mService.mProcessNames.get(r.processName, r.info.applicationInfo.uid); 2705 } 2706 if (proc == null || proc.thread == null) { 2707 showStartingIcon = true; 2708 } 2709 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 2710 "Prepare open transition: starting " + r); 2711 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_NO_ANIMATION) != 0) { 2712 mWindowManager.prepareAppTransition(TRANSIT_NONE, keepCurTransition); 2713 mNoAnimActivities.add(r); 2714 } else { 2715 mWindowManager.prepareAppTransition(newTask 2716 ? r.mLaunchTaskBehind 2717 ? TRANSIT_TASK_OPEN_BEHIND 2718 : TRANSIT_TASK_OPEN 2719 : TRANSIT_ACTIVITY_OPEN, keepCurTransition); 2720 mNoAnimActivities.remove(r); 2721 } 2722 addConfigOverride(r, task); 2723 boolean doShow = true; 2724 if (newTask) { 2725 // Even though this activity is starting fresh, we still need 2726 // to reset it to make sure we apply affinities to move any 2727 // existing activities from other tasks in to it. 2728 // If the caller has requested that the target task be 2729 // reset, then do so. 2730 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED) != 0) { 2731 resetTaskIfNeededLocked(r, r); 2732 doShow = topRunningNonDelayedActivityLocked(null) == r; 2733 } 2734 } else if (options != null && options.getAnimationType() 2735 == ActivityOptions.ANIM_SCENE_TRANSITION) { 2736 doShow = false; 2737 } 2738 if (r.mLaunchTaskBehind) { 2739 // Don't do a starting window for mLaunchTaskBehind. More importantly make sure we 2740 // tell WindowManager that r is visible even though it is at the back of the stack. 2741 mWindowManager.setAppVisibility(r.appToken, true); 2742 ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS); 2743 } else if (SHOW_APP_STARTING_PREVIEW && doShow) { 2744 // Figure out if we are transitioning from another activity that is 2745 // "has the same starting icon" as the next one. This allows the 2746 // window manager to keep the previous window it had previously 2747 // created, if it still had one. 2748 ActivityRecord prev = r.task.topRunningActivityWithStartingWindowLocked(); 2749 if (prev != null) { 2750 // We don't want to reuse the previous starting preview if: 2751 // (1) The current activity is in a different task. 2752 if (prev.task != r.task) { 2753 prev = null; 2754 } 2755 // (2) The current activity is already displayed. 2756 else if (prev.nowVisible) { 2757 prev = null; 2758 } 2759 } 2760 r.showStartingWindow(prev, showStartingIcon); 2761 } 2762 } else { 2763 // If this is the first activity, don't do any fancy animations, 2764 // because there is nothing for it to animate on top of. 2765 addConfigOverride(r, task); 2766 ActivityOptions.abort(options); 2767 options = null; 2768 } 2769 if (VALIDATE_TOKENS) { 2770 validateAppTokensLocked(); 2771 } 2772 } 2773 2774 final void validateAppTokensLocked() { 2775 mValidateAppTokens.clear(); 2776 mValidateAppTokens.ensureCapacity(numActivities()); 2777 final int numTasks = mTaskHistory.size(); 2778 for (int taskNdx = 0; taskNdx < numTasks; ++taskNdx) { 2779 TaskRecord task = mTaskHistory.get(taskNdx); 2780 final ArrayList<ActivityRecord> activities = task.mActivities; 2781 if (activities.isEmpty()) { 2782 continue; 2783 } 2784 TaskGroup group = new TaskGroup(); 2785 group.taskId = task.taskId; 2786 mValidateAppTokens.add(group); 2787 final int numActivities = activities.size(); 2788 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 2789 final ActivityRecord r = activities.get(activityNdx); 2790 group.tokens.add(r.appToken); 2791 } 2792 } 2793 mWindowManager.validateAppTokens(mStackId, mValidateAppTokens); 2794 } 2795 2796 /** 2797 * Perform a reset of the given task, if needed as part of launching it. 2798 * Returns the new HistoryRecord at the top of the task. 2799 */ 2800 /** 2801 * Helper method for #resetTaskIfNeededLocked. 2802 * We are inside of the task being reset... we'll either finish this activity, push it out 2803 * for another task, or leave it as-is. 2804 * @param task The task containing the Activity (taskTop) that might be reset. 2805 * @param forceReset 2806 * @return An ActivityOptions that needs to be processed. 2807 */ 2808 final ActivityOptions resetTargetTaskIfNeededLocked(TaskRecord task, boolean forceReset) { 2809 ActivityOptions topOptions = null; 2810 2811 int replyChainEnd = -1; 2812 boolean canMoveOptions = true; 2813 2814 // We only do this for activities that are not the root of the task (since if we finish 2815 // the root, we may no longer have the task!). 2816 final ArrayList<ActivityRecord> activities = task.mActivities; 2817 final int numActivities = activities.size(); 2818 final int rootActivityNdx = task.findEffectiveRootIndex(); 2819 for (int i = numActivities - 1; i > rootActivityNdx; --i ) { 2820 ActivityRecord target = activities.get(i); 2821 if (target.frontOfTask) 2822 break; 2823 2824 final int flags = target.info.flags; 2825 final boolean finishOnTaskLaunch = 2826 (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2827 final boolean allowTaskReparenting = 2828 (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2829 final boolean clearWhenTaskReset = 2830 (target.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0; 2831 2832 if (!finishOnTaskLaunch 2833 && !clearWhenTaskReset 2834 && target.resultTo != null) { 2835 // If this activity is sending a reply to a previous 2836 // activity, we can't do anything with it now until 2837 // we reach the start of the reply chain. 2838 // XXX note that we are assuming the result is always 2839 // to the previous activity, which is almost always 2840 // the case but we really shouldn't count on. 2841 if (replyChainEnd < 0) { 2842 replyChainEnd = i; 2843 } 2844 } else if (!finishOnTaskLaunch 2845 && !clearWhenTaskReset 2846 && allowTaskReparenting 2847 && target.taskAffinity != null 2848 && !target.taskAffinity.equals(task.affinity)) { 2849 // If this activity has an affinity for another 2850 // task, then we need to move it out of here. We will 2851 // move it as far out of the way as possible, to the 2852 // bottom of the activity stack. This also keeps it 2853 // correctly ordered with any activities we previously 2854 // moved. 2855 final TaskRecord targetTask; 2856 final ActivityRecord bottom = 2857 !mTaskHistory.isEmpty() && !mTaskHistory.get(0).mActivities.isEmpty() ? 2858 mTaskHistory.get(0).mActivities.get(0) : null; 2859 if (bottom != null && target.taskAffinity != null 2860 && target.taskAffinity.equals(bottom.task.affinity)) { 2861 // If the activity currently at the bottom has the 2862 // same task affinity as the one we are moving, 2863 // then merge it into the same task. 2864 targetTask = bottom.task; 2865 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2866 + " out to bottom task " + bottom.task); 2867 } else { 2868 targetTask = createTaskRecord( 2869 mStackSupervisor.getNextTaskIdForUserLocked(target.userId), 2870 target.info, null, null, null, false); 2871 targetTask.affinityIntent = target.intent; 2872 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Start pushing activity " + target 2873 + " out to new task " + target.task); 2874 } 2875 2876 setAppTask(target, targetTask); 2877 2878 boolean noOptions = canMoveOptions; 2879 final int start = replyChainEnd < 0 ? i : replyChainEnd; 2880 for (int srcPos = start; srcPos >= i; --srcPos) { 2881 final ActivityRecord p = activities.get(srcPos); 2882 if (p.finishing) { 2883 continue; 2884 } 2885 2886 canMoveOptions = false; 2887 if (noOptions && topOptions == null) { 2888 topOptions = p.takeOptionsLocked(); 2889 if (topOptions != null) { 2890 noOptions = false; 2891 } 2892 } 2893 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 2894 "Removing activity " + p + " from task=" + task + " adding to task=" 2895 + targetTask + " Callers=" + Debug.getCallers(4)); 2896 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 2897 "Pushing next activity " + p + " out to target's task " + target.task); 2898 p.setTask(targetTask, null); 2899 targetTask.addActivityAtBottom(p); 2900 2901 setAppTask(p, targetTask); 2902 } 2903 2904 mWindowManager.moveTaskToBottom(targetTask.taskId); 2905 if (VALIDATE_TOKENS) { 2906 validateAppTokensLocked(); 2907 } 2908 2909 replyChainEnd = -1; 2910 } else if (forceReset || finishOnTaskLaunch || clearWhenTaskReset) { 2911 // If the activity should just be removed -- either 2912 // because it asks for it, or the task should be 2913 // cleared -- then finish it and anything that is 2914 // part of its reply chain. 2915 int end; 2916 if (clearWhenTaskReset) { 2917 // In this case, we want to finish this activity 2918 // and everything above it, so be sneaky and pretend 2919 // like these are all in the reply chain. 2920 end = activities.size() - 1; 2921 } else if (replyChainEnd < 0) { 2922 end = i; 2923 } else { 2924 end = replyChainEnd; 2925 } 2926 boolean noOptions = canMoveOptions; 2927 for (int srcPos = i; srcPos <= end; srcPos++) { 2928 ActivityRecord p = activities.get(srcPos); 2929 if (p.finishing) { 2930 continue; 2931 } 2932 canMoveOptions = false; 2933 if (noOptions && topOptions == null) { 2934 topOptions = p.takeOptionsLocked(); 2935 if (topOptions != null) { 2936 noOptions = false; 2937 } 2938 } 2939 if (DEBUG_TASKS) Slog.w(TAG_TASKS, 2940 "resetTaskIntendedTask: calling finishActivity on " + p); 2941 if (finishActivityLocked( 2942 p, Activity.RESULT_CANCELED, null, "reset-task", false)) { 2943 end--; 2944 srcPos--; 2945 } 2946 } 2947 replyChainEnd = -1; 2948 } else { 2949 // If we were in the middle of a chain, well the 2950 // activity that started it all doesn't want anything 2951 // special, so leave it all as-is. 2952 replyChainEnd = -1; 2953 } 2954 } 2955 2956 return topOptions; 2957 } 2958 2959 /** 2960 * Helper method for #resetTaskIfNeededLocked. Processes all of the activities in a given 2961 * TaskRecord looking for an affinity with the task of resetTaskIfNeededLocked.taskTop. 2962 * @param affinityTask The task we are looking for an affinity to. 2963 * @param task Task that resetTaskIfNeededLocked.taskTop belongs to. 2964 * @param topTaskIsHigher True if #task has already been processed by resetTaskIfNeededLocked. 2965 * @param forceReset Flag passed in to resetTaskIfNeededLocked. 2966 */ 2967 private int resetAffinityTaskIfNeededLocked(TaskRecord affinityTask, TaskRecord task, 2968 boolean topTaskIsHigher, boolean forceReset, int taskInsertionPoint) { 2969 int replyChainEnd = -1; 2970 final int taskId = task.taskId; 2971 final String taskAffinity = task.affinity; 2972 2973 final ArrayList<ActivityRecord> activities = affinityTask.mActivities; 2974 final int numActivities = activities.size(); 2975 final int rootActivityNdx = affinityTask.findEffectiveRootIndex(); 2976 2977 // Do not operate on or below the effective root Activity. 2978 for (int i = numActivities - 1; i > rootActivityNdx; --i) { 2979 ActivityRecord target = activities.get(i); 2980 if (target.frontOfTask) 2981 break; 2982 2983 final int flags = target.info.flags; 2984 boolean finishOnTaskLaunch = (flags & ActivityInfo.FLAG_FINISH_ON_TASK_LAUNCH) != 0; 2985 boolean allowTaskReparenting = (flags & ActivityInfo.FLAG_ALLOW_TASK_REPARENTING) != 0; 2986 2987 if (target.resultTo != null) { 2988 // If this activity is sending a reply to a previous 2989 // activity, we can't do anything with it now until 2990 // we reach the start of the reply chain. 2991 // XXX note that we are assuming the result is always 2992 // to the previous activity, which is almost always 2993 // the case but we really shouldn't count on. 2994 if (replyChainEnd < 0) { 2995 replyChainEnd = i; 2996 } 2997 } else if (topTaskIsHigher 2998 && allowTaskReparenting 2999 && taskAffinity != null 3000 && taskAffinity.equals(target.taskAffinity)) { 3001 // This activity has an affinity for our task. Either remove it if we are 3002 // clearing or move it over to our task. Note that 3003 // we currently punt on the case where we are resetting a 3004 // task that is not at the top but who has activities above 3005 // with an affinity to it... this is really not a normal 3006 // case, and we will need to later pull that task to the front 3007 // and usually at that point we will do the reset and pick 3008 // up those remaining activities. (This only happens if 3009 // someone starts an activity in a new task from an activity 3010 // in a task that is not currently on top.) 3011 if (forceReset || finishOnTaskLaunch) { 3012 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 3013 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 3014 "Finishing task at index " + start + " to " + i); 3015 for (int srcPos = start; srcPos >= i; --srcPos) { 3016 final ActivityRecord p = activities.get(srcPos); 3017 if (p.finishing) { 3018 continue; 3019 } 3020 finishActivityLocked( 3021 p, Activity.RESULT_CANCELED, null, "move-affinity", false); 3022 } 3023 } else { 3024 if (taskInsertionPoint < 0) { 3025 taskInsertionPoint = task.mActivities.size(); 3026 3027 } 3028 3029 final int start = replyChainEnd >= 0 ? replyChainEnd : i; 3030 if (DEBUG_TASKS) Slog.v(TAG_TASKS, 3031 "Reparenting from task=" + affinityTask + ":" + start + "-" + i 3032 + " to task=" + task + ":" + taskInsertionPoint); 3033 for (int srcPos = start; srcPos >= i; --srcPos) { 3034 final ActivityRecord p = activities.get(srcPos); 3035 p.setTask(task, null); 3036 task.addActivityAtIndex(taskInsertionPoint, p); 3037 3038 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3039 "Removing and adding activity " + p + " to stack at " + task 3040 + " callers=" + Debug.getCallers(3)); 3041 if (DEBUG_TASKS) Slog.v(TAG_TASKS, "Pulling activity " + p 3042 + " from " + srcPos + " in to resetting task " + task); 3043 setAppTask(p, task); 3044 } 3045 mWindowManager.moveTaskToTop(taskId); 3046 if (VALIDATE_TOKENS) { 3047 validateAppTokensLocked(); 3048 } 3049 3050 // Now we've moved it in to place... but what if this is 3051 // a singleTop activity and we have put it on top of another 3052 // instance of the same activity? Then we drop the instance 3053 // below so it remains singleTop. 3054 if (target.info.launchMode == ActivityInfo.LAUNCH_SINGLE_TOP) { 3055 ArrayList<ActivityRecord> taskActivities = task.mActivities; 3056 int targetNdx = taskActivities.indexOf(target); 3057 if (targetNdx > 0) { 3058 ActivityRecord p = taskActivities.get(targetNdx - 1); 3059 if (p.intent.getComponent().equals(target.intent.getComponent())) { 3060 finishActivityLocked(p, Activity.RESULT_CANCELED, null, "replace", 3061 false); 3062 } 3063 } 3064 } 3065 } 3066 3067 replyChainEnd = -1; 3068 } 3069 } 3070 return taskInsertionPoint; 3071 } 3072 3073 final ActivityRecord resetTaskIfNeededLocked(ActivityRecord taskTop, 3074 ActivityRecord newActivity) { 3075 boolean forceReset = 3076 (newActivity.info.flags & ActivityInfo.FLAG_CLEAR_TASK_ON_LAUNCH) != 0; 3077 if (ACTIVITY_INACTIVE_RESET_TIME > 0 3078 && taskTop.task.getInactiveDuration() > ACTIVITY_INACTIVE_RESET_TIME) { 3079 if ((newActivity.info.flags & ActivityInfo.FLAG_ALWAYS_RETAIN_TASK_STATE) == 0) { 3080 forceReset = true; 3081 } 3082 } 3083 3084 final TaskRecord task = taskTop.task; 3085 3086 /** False until we evaluate the TaskRecord associated with taskTop. Switches to true 3087 * for remaining tasks. Used for later tasks to reparent to task. */ 3088 boolean taskFound = false; 3089 3090 /** If ActivityOptions are moved out and need to be aborted or moved to taskTop. */ 3091 ActivityOptions topOptions = null; 3092 3093 // Preserve the location for reparenting in the new task. 3094 int reparentInsertionPoint = -1; 3095 3096 for (int i = mTaskHistory.size() - 1; i >= 0; --i) { 3097 final TaskRecord targetTask = mTaskHistory.get(i); 3098 3099 if (targetTask == task) { 3100 topOptions = resetTargetTaskIfNeededLocked(task, forceReset); 3101 taskFound = true; 3102 } else { 3103 reparentInsertionPoint = resetAffinityTaskIfNeededLocked(targetTask, task, 3104 taskFound, forceReset, reparentInsertionPoint); 3105 } 3106 } 3107 3108 int taskNdx = mTaskHistory.indexOf(task); 3109 if (taskNdx >= 0) { 3110 do { 3111 taskTop = mTaskHistory.get(taskNdx--).getTopActivity(); 3112 } while (taskTop == null && taskNdx >= 0); 3113 } 3114 3115 if (topOptions != null) { 3116 // If we got some ActivityOptions from an activity on top that 3117 // was removed from the task, propagate them to the new real top. 3118 if (taskTop != null) { 3119 taskTop.updateOptionsLocked(topOptions); 3120 } else { 3121 topOptions.abort(); 3122 } 3123 } 3124 3125 return taskTop; 3126 } 3127 3128 void sendActivityResultLocked(int callingUid, ActivityRecord r, 3129 String resultWho, int requestCode, int resultCode, Intent data) { 3130 3131 if (callingUid > 0) { 3132 mService.grantUriPermissionFromIntentLocked(callingUid, r.packageName, 3133 data, r.getUriPermissionsLocked(), r.userId); 3134 } 3135 3136 if (DEBUG_RESULTS) Slog.v(TAG, "Send activity result to " + r 3137 + " : who=" + resultWho + " req=" + requestCode 3138 + " res=" + resultCode + " data=" + data); 3139 if (mResumedActivity == r && r.app != null && r.app.thread != null) { 3140 try { 3141 ArrayList<ResultInfo> list = new ArrayList<ResultInfo>(); 3142 list.add(new ResultInfo(resultWho, requestCode, 3143 resultCode, data)); 3144 r.app.thread.scheduleSendResult(r.appToken, list); 3145 return; 3146 } catch (Exception e) { 3147 Slog.w(TAG, "Exception thrown sending result to " + r, e); 3148 } 3149 } 3150 3151 r.addResultLocked(null, resultWho, requestCode, resultCode, data); 3152 } 3153 3154 private void adjustFocusedActivityLocked(ActivityRecord r, String reason) { 3155 if (!mStackSupervisor.isFocusedStack(this) || mService.mFocusedActivity != r) { 3156 return; 3157 } 3158 3159 final ActivityRecord next = topRunningActivityLocked(); 3160 final String myReason = reason + " adjustFocus"; 3161 if (next != r) { 3162 if (next != null && StackId.keepFocusInStackIfPossible(mStackId) && isFocusable()) { 3163 // For freeform, docked, and pinned stacks we always keep the focus within the 3164 // stack as long as there is a running activity in the stack that we can adjust 3165 // focus to. 3166 mService.setFocusedActivityLocked(next, myReason); 3167 return; 3168 } else { 3169 final TaskRecord task = r.task; 3170 if (r.frontOfTask && task == topTask() && task.isOverHomeStack()) { 3171 final int taskToReturnTo = task.getTaskToReturnTo(); 3172 3173 // For non-fullscreen stack, we want to move the focus to the next visible 3174 // stack to prevent the home screen from moving to the top and obscuring 3175 // other visible stacks. 3176 if (!mFullscreen 3177 && adjustFocusToNextFocusableStackLocked(taskToReturnTo, myReason)) { 3178 return; 3179 } 3180 // Move the home stack to the top if this stack is fullscreen or there is no 3181 // other visible stack. 3182 if (mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, myReason)) { 3183 // Activity focus was already adjusted. Nothing else to do... 3184 return; 3185 } 3186 } 3187 } 3188 } 3189 3190 mService.setFocusedActivityLocked(mStackSupervisor.topRunningActivityLocked(), myReason); 3191 } 3192 3193 private boolean adjustFocusToNextFocusableStackLocked(int taskToReturnTo, String reason) { 3194 final ActivityStack stack = getNextFocusableStackLocked(); 3195 final String myReason = reason + " adjustFocusToNextFocusableStack"; 3196 if (stack == null) { 3197 return false; 3198 } 3199 3200 final ActivityRecord top = stack.topRunningActivityLocked(); 3201 3202 if (stack.isHomeStack() && (top == null || !top.visible)) { 3203 // If we will be focusing on the home stack next and its current top activity isn't 3204 // visible, then use the task return to value to determine the home task to display next. 3205 return mStackSupervisor.moveHomeStackTaskToTop(taskToReturnTo, reason); 3206 } 3207 return mService.setFocusedActivityLocked(top, myReason); 3208 } 3209 3210 final void stopActivityLocked(ActivityRecord r) { 3211 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + r); 3212 if ((r.intent.getFlags()&Intent.FLAG_ACTIVITY_NO_HISTORY) != 0 3213 || (r.info.flags&ActivityInfo.FLAG_NO_HISTORY) != 0) { 3214 if (!r.finishing) { 3215 if (!mService.isSleeping()) { 3216 if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + r); 3217 if (requestFinishActivityLocked(r.appToken, Activity.RESULT_CANCELED, null, 3218 "stop-no-history", false)) { 3219 // Activity was finished, no need to continue trying to schedule stop. 3220 adjustFocusedActivityLocked(r, "stopActivityFinished"); 3221 r.resumeKeyDispatchingLocked(); 3222 return; 3223 } 3224 } else { 3225 if (DEBUG_STATES) Slog.d(TAG_STATES, "Not finishing noHistory " + r 3226 + " on stop because we're just sleeping"); 3227 } 3228 } 3229 } 3230 3231 if (r.app != null && r.app.thread != null) { 3232 adjustFocusedActivityLocked(r, "stopActivity"); 3233 r.resumeKeyDispatchingLocked(); 3234 try { 3235 r.stopped = false; 3236 if (DEBUG_STATES) Slog.v(TAG_STATES, 3237 "Moving to STOPPING: " + r + " (stop requested)"); 3238 r.state = ActivityState.STOPPING; 3239 if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, 3240 "Stopping visible=" + r.visible + " for " + r); 3241 if (!r.visible) { 3242 mWindowManager.setAppVisibility(r.appToken, false); 3243 } 3244 EventLogTags.writeAmStopActivity( 3245 r.userId, System.identityHashCode(r), r.shortComponentName); 3246 r.app.thread.scheduleStopActivity(r.appToken, r.visible, r.configChangeFlags); 3247 if (mService.isSleepingOrShuttingDown()) { 3248 r.setSleeping(true); 3249 } 3250 Message msg = mHandler.obtainMessage(STOP_TIMEOUT_MSG, r); 3251 mHandler.sendMessageDelayed(msg, STOP_TIMEOUT); 3252 } catch (Exception e) { 3253 // Maybe just ignore exceptions here... if the process 3254 // has crashed, our death notification will clean things 3255 // up. 3256 Slog.w(TAG, "Exception thrown during pause", e); 3257 // Just in case, assume it to be stopped. 3258 r.stopped = true; 3259 if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + r); 3260 r.state = ActivityState.STOPPED; 3261 if (r.deferRelaunchUntilPaused) { 3262 destroyActivityLocked(r, true, "stop-except"); 3263 } 3264 } 3265 } 3266 } 3267 3268 /** 3269 * @return Returns true if the activity is being finished, false if for 3270 * some reason it is being left as-is. 3271 */ 3272 final boolean requestFinishActivityLocked(IBinder token, int resultCode, 3273 Intent resultData, String reason, boolean oomAdj) { 3274 ActivityRecord r = isInStackLocked(token); 3275 if (DEBUG_RESULTS || DEBUG_STATES) Slog.v(TAG_STATES, 3276 "Finishing activity token=" + token + " r=" 3277 + ", result=" + resultCode + ", data=" + resultData 3278 + ", reason=" + reason); 3279 if (r == null) { 3280 return false; 3281 } 3282 3283 finishActivityLocked(r, resultCode, resultData, reason, oomAdj); 3284 return true; 3285 } 3286 3287 final void finishSubActivityLocked(ActivityRecord self, String resultWho, int requestCode) { 3288 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3289 ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3290 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3291 ActivityRecord r = activities.get(activityNdx); 3292 if (r.resultTo == self && r.requestCode == requestCode) { 3293 if ((r.resultWho == null && resultWho == null) || 3294 (r.resultWho != null && r.resultWho.equals(resultWho))) { 3295 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "request-sub", 3296 false); 3297 } 3298 } 3299 } 3300 } 3301 mService.updateOomAdjLocked(); 3302 } 3303 3304 final TaskRecord finishTopRunningActivityLocked(ProcessRecord app, String reason) { 3305 ActivityRecord r = topRunningActivityLocked(); 3306 TaskRecord finishedTask = null; 3307 if (r == null || r.app != app) { 3308 return null; 3309 } 3310 Slog.w(TAG, " Force finishing activity " 3311 + r.intent.getComponent().flattenToShortString()); 3312 int taskNdx = mTaskHistory.indexOf(r.task); 3313 int activityNdx = r.task.mActivities.indexOf(r); 3314 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3315 finishedTask = r.task; 3316 // Also terminate any activities below it that aren't yet 3317 // stopped, to avoid a situation where one will get 3318 // re-start our crashing activity once it gets resumed again. 3319 --activityNdx; 3320 if (activityNdx < 0) { 3321 do { 3322 --taskNdx; 3323 if (taskNdx < 0) { 3324 break; 3325 } 3326 activityNdx = mTaskHistory.get(taskNdx).mActivities.size() - 1; 3327 } while (activityNdx < 0); 3328 } 3329 if (activityNdx >= 0) { 3330 r = mTaskHistory.get(taskNdx).mActivities.get(activityNdx); 3331 if (r.state == ActivityState.RESUMED 3332 || r.state == ActivityState.PAUSING 3333 || r.state == ActivityState.PAUSED) { 3334 if (!r.isHomeActivity() || mService.mHomeProcess != r.app) { 3335 Slog.w(TAG, " Force finishing activity " 3336 + r.intent.getComponent().flattenToShortString()); 3337 finishActivityLocked(r, Activity.RESULT_CANCELED, null, reason, false); 3338 } 3339 } 3340 } 3341 return finishedTask; 3342 } 3343 3344 final void finishVoiceTask(IVoiceInteractionSession session) { 3345 IBinder sessionBinder = session.asBinder(); 3346 boolean didOne = false; 3347 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3348 TaskRecord tr = mTaskHistory.get(taskNdx); 3349 if (tr.voiceSession != null && tr.voiceSession.asBinder() == sessionBinder) { 3350 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3351 ActivityRecord r = tr.mActivities.get(activityNdx); 3352 if (!r.finishing) { 3353 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "finish-voice", 3354 false); 3355 didOne = true; 3356 } 3357 } 3358 } else { 3359 // Check if any of the activities are using voice 3360 for (int activityNdx = tr.mActivities.size() - 1; activityNdx >= 0; --activityNdx) { 3361 ActivityRecord r = tr.mActivities.get(activityNdx); 3362 if (r.voiceSession != null 3363 && r.voiceSession.asBinder() == sessionBinder) { 3364 // Inform of cancellation 3365 r.clearVoiceSessionLocked(); 3366 try { 3367 r.app.thread.scheduleLocalVoiceInteractionStarted((IBinder) r.appToken, 3368 null); 3369 } catch (RemoteException re) { 3370 // Ok 3371 } 3372 mService.finishRunningVoiceLocked(); 3373 break; 3374 } 3375 } 3376 } 3377 } 3378 3379 if (didOne) { 3380 mService.updateOomAdjLocked(); 3381 } 3382 } 3383 3384 final boolean finishActivityAffinityLocked(ActivityRecord r) { 3385 ArrayList<ActivityRecord> activities = r.task.mActivities; 3386 for (int index = activities.indexOf(r); index >= 0; --index) { 3387 ActivityRecord cur = activities.get(index); 3388 if (!Objects.equals(cur.taskAffinity, r.taskAffinity)) { 3389 break; 3390 } 3391 finishActivityLocked(cur, Activity.RESULT_CANCELED, null, "request-affinity", true); 3392 } 3393 return true; 3394 } 3395 3396 final void finishActivityResultsLocked(ActivityRecord r, int resultCode, Intent resultData) { 3397 // send the result 3398 ActivityRecord resultTo = r.resultTo; 3399 if (resultTo != null) { 3400 if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "Adding result to " + resultTo 3401 + " who=" + r.resultWho + " req=" + r.requestCode 3402 + " res=" + resultCode + " data=" + resultData); 3403 if (resultTo.userId != r.userId) { 3404 if (resultData != null) { 3405 resultData.prepareToLeaveUser(r.userId); 3406 } 3407 } 3408 if (r.info.applicationInfo.uid > 0) { 3409 mService.grantUriPermissionFromIntentLocked(r.info.applicationInfo.uid, 3410 resultTo.packageName, resultData, 3411 resultTo.getUriPermissionsLocked(), resultTo.userId); 3412 } 3413 resultTo.addResultLocked(r, r.resultWho, r.requestCode, resultCode, 3414 resultData); 3415 r.resultTo = null; 3416 } 3417 else if (DEBUG_RESULTS) Slog.v(TAG_RESULTS, "No result destination from " + r); 3418 3419 // Make sure this HistoryRecord is not holding on to other resources, 3420 // because clients have remote IPC references to this object so we 3421 // can't assume that will go away and want to avoid circular IPC refs. 3422 r.results = null; 3423 r.pendingResults = null; 3424 r.newIntents = null; 3425 r.icicle = null; 3426 } 3427 3428 /** 3429 * @return Returns true if this activity has been removed from the history 3430 * list, or false if it is still in the list and will be removed later. 3431 */ 3432 final boolean finishActivityLocked(ActivityRecord r, int resultCode, Intent resultData, 3433 String reason, boolean oomAdj) { 3434 if (r.finishing) { 3435 Slog.w(TAG, "Duplicate finish request for " + r); 3436 return false; 3437 } 3438 3439 r.makeFinishingLocked(); 3440 final TaskRecord task = r.task; 3441 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 3442 r.userId, System.identityHashCode(r), 3443 task.taskId, r.shortComponentName, reason); 3444 final ArrayList<ActivityRecord> activities = task.mActivities; 3445 final int index = activities.indexOf(r); 3446 if (index < (activities.size() - 1)) { 3447 task.setFrontOfTask(); 3448 if ((r.intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) { 3449 // If the caller asked that this activity (and all above it) 3450 // be cleared when the task is reset, don't lose that information, 3451 // but propagate it up to the next activity. 3452 ActivityRecord next = activities.get(index+1); 3453 next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 3454 } 3455 } 3456 3457 r.pauseKeyDispatchingLocked(); 3458 3459 adjustFocusedActivityLocked(r, "finishActivity"); 3460 3461 finishActivityResultsLocked(r, resultCode, resultData); 3462 3463 final boolean endTask = index <= 0; 3464 final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE; 3465 if (mResumedActivity == r) { 3466 3467 if (DEBUG_VISIBILITY || DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, 3468 "Prepare close transition: finishing " + r); 3469 mWindowManager.prepareAppTransition(transit, false); 3470 3471 // Tell window manager to prepare for this one to be removed. 3472 mWindowManager.setAppVisibility(r.appToken, false); 3473 3474 if (mPausingActivity == null) { 3475 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + r); 3476 if (DEBUG_USER_LEAVING) Slog.v(TAG_USER_LEAVING, 3477 "finish() => pause with userLeaving=false"); 3478 startPausingLocked(false, false, false, false); 3479 } 3480 3481 if (endTask) { 3482 mStackSupervisor.removeLockedTaskLocked(task); 3483 } 3484 } else if (r.state != ActivityState.PAUSING) { 3485 // If the activity is PAUSING, we will complete the finish once 3486 // it is done pausing; else we can just directly finish it here. 3487 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish not pausing: " + r); 3488 if (r.visible) { 3489 mWindowManager.prepareAppTransition(transit, false); 3490 mWindowManager.setAppVisibility(r.appToken, false); 3491 mWindowManager.executeAppTransition(); 3492 if (!mStackSupervisor.mWaitingVisibleActivities.contains(r)) { 3493 mStackSupervisor.mWaitingVisibleActivities.add(r); 3494 } 3495 } 3496 return finishCurrentActivityLocked(r, (r.visible || r.nowVisible) ? 3497 FINISH_AFTER_VISIBLE : FINISH_AFTER_PAUSE, oomAdj) == null; 3498 } else { 3499 if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + r); 3500 } 3501 3502 return false; 3503 } 3504 3505 static final int FINISH_IMMEDIATELY = 0; 3506 static final int FINISH_AFTER_PAUSE = 1; 3507 static final int FINISH_AFTER_VISIBLE = 2; 3508 3509 final ActivityRecord finishCurrentActivityLocked(ActivityRecord r, int mode, boolean oomAdj) { 3510 // First things first: if this activity is currently visible, 3511 // and the resumed activity is not yet visible, then hold off on 3512 // finishing until the resumed one becomes visible. 3513 3514 final ActivityRecord next = mStackSupervisor.topRunningActivityLocked(); 3515 3516 if (mode == FINISH_AFTER_VISIBLE && (r.visible || r.nowVisible) 3517 && next != null && !next.nowVisible) { 3518 if (!mStackSupervisor.mStoppingActivities.contains(r)) { 3519 addToStopping(r, false /* immediate */); 3520 } 3521 if (DEBUG_STATES) Slog.v(TAG_STATES, 3522 "Moving to STOPPING: "+ r + " (finish requested)"); 3523 r.state = ActivityState.STOPPING; 3524 if (oomAdj) { 3525 mService.updateOomAdjLocked(); 3526 } 3527 return r; 3528 } 3529 3530 // make sure the record is cleaned out of other places. 3531 mStackSupervisor.mStoppingActivities.remove(r); 3532 mStackSupervisor.mGoingToSleepActivities.remove(r); 3533 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3534 if (mResumedActivity == r) { 3535 mResumedActivity = null; 3536 } 3537 final ActivityState prevState = r.state; 3538 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to FINISHING: " + r); 3539 r.state = ActivityState.FINISHING; 3540 3541 if (mode == FINISH_IMMEDIATELY 3542 || (prevState == ActivityState.PAUSED 3543 && (mode == FINISH_AFTER_PAUSE || mStackId == PINNED_STACK_ID)) 3544 || prevState == ActivityState.STOPPED 3545 || prevState == ActivityState.INITIALIZING) { 3546 r.makeFinishingLocked(); 3547 boolean activityRemoved = destroyActivityLocked(r, true, "finish-imm"); 3548 if (activityRemoved) { 3549 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3550 } 3551 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, 3552 "destroyActivityLocked: finishCurrentActivityLocked r=" + r + 3553 " destroy returned removed=" + activityRemoved); 3554 return activityRemoved ? null : r; 3555 } 3556 3557 // Need to go through the full pause cycle to get this 3558 // activity into the stopped state and then finish it. 3559 if (DEBUG_ALL) Slog.v(TAG, "Enqueueing pending finish: " + r); 3560 mStackSupervisor.mFinishingActivities.add(r); 3561 r.resumeKeyDispatchingLocked(); 3562 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3563 return r; 3564 } 3565 3566 void finishAllActivitiesLocked(boolean immediately) { 3567 boolean noActivitiesInStack = true; 3568 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3569 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3570 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3571 final ActivityRecord r = activities.get(activityNdx); 3572 noActivitiesInStack = false; 3573 if (r.finishing && !immediately) { 3574 continue; 3575 } 3576 Slog.d(TAG, "finishAllActivitiesLocked: finishing " + r + " immediately"); 3577 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 3578 } 3579 } 3580 if (noActivitiesInStack) { 3581 mActivityContainer.onTaskListEmptyLocked(); 3582 } 3583 } 3584 3585 final boolean shouldUpRecreateTaskLocked(ActivityRecord srec, String destAffinity) { 3586 // Basic case: for simple app-centric recents, we need to recreate 3587 // the task if the affinity has changed. 3588 if (srec == null || srec.task.affinity == null || 3589 !srec.task.affinity.equals(destAffinity)) { 3590 return true; 3591 } 3592 // Document-centric case: an app may be split in to multiple documents; 3593 // they need to re-create their task if this current activity is the root 3594 // of a document, unless simply finishing it will return them to the the 3595 // correct app behind. 3596 if (srec.frontOfTask && srec.task != null && srec.task.getBaseIntent() != null 3597 && srec.task.getBaseIntent().isDocument()) { 3598 // Okay, this activity is at the root of its task. What to do, what to do... 3599 if (srec.task.getTaskToReturnTo() != ActivityRecord.APPLICATION_ACTIVITY_TYPE) { 3600 // Finishing won't return to an application, so we need to recreate. 3601 return true; 3602 } 3603 // We now need to get the task below it to determine what to do. 3604 int taskIdx = mTaskHistory.indexOf(srec.task); 3605 if (taskIdx <= 0) { 3606 Slog.w(TAG, "shouldUpRecreateTask: task not in history for " + srec); 3607 return false; 3608 } 3609 if (taskIdx == 0) { 3610 // At the bottom of the stack, nothing to go back to. 3611 return true; 3612 } 3613 TaskRecord prevTask = mTaskHistory.get(taskIdx); 3614 if (!srec.task.affinity.equals(prevTask.affinity)) { 3615 // These are different apps, so need to recreate. 3616 return true; 3617 } 3618 } 3619 return false; 3620 } 3621 3622 final boolean navigateUpToLocked(ActivityRecord srec, Intent destIntent, int resultCode, 3623 Intent resultData) { 3624 final TaskRecord task = srec.task; 3625 final ArrayList<ActivityRecord> activities = task.mActivities; 3626 final int start = activities.indexOf(srec); 3627 if (!mTaskHistory.contains(task) || (start < 0)) { 3628 return false; 3629 } 3630 int finishTo = start - 1; 3631 ActivityRecord parent = finishTo < 0 ? null : activities.get(finishTo); 3632 boolean foundParentInTask = false; 3633 final ComponentName dest = destIntent.getComponent(); 3634 if (start > 0 && dest != null) { 3635 for (int i = finishTo; i >= 0; i--) { 3636 ActivityRecord r = activities.get(i); 3637 if (r.info.packageName.equals(dest.getPackageName()) && 3638 r.info.name.equals(dest.getClassName())) { 3639 finishTo = i; 3640 parent = r; 3641 foundParentInTask = true; 3642 break; 3643 } 3644 } 3645 } 3646 3647 IActivityController controller = mService.mController; 3648 if (controller != null) { 3649 ActivityRecord next = topRunningActivityLocked(srec.appToken, 0); 3650 if (next != null) { 3651 // ask watcher if this is allowed 3652 boolean resumeOK = true; 3653 try { 3654 resumeOK = controller.activityResuming(next.packageName); 3655 } catch (RemoteException e) { 3656 mService.mController = null; 3657 Watchdog.getInstance().setActivityController(null); 3658 } 3659 3660 if (!resumeOK) { 3661 return false; 3662 } 3663 } 3664 } 3665 final long origId = Binder.clearCallingIdentity(); 3666 for (int i = start; i > finishTo; i--) { 3667 ActivityRecord r = activities.get(i); 3668 requestFinishActivityLocked(r.appToken, resultCode, resultData, "navigate-up", true); 3669 // Only return the supplied result for the first activity finished 3670 resultCode = Activity.RESULT_CANCELED; 3671 resultData = null; 3672 } 3673 3674 if (parent != null && foundParentInTask) { 3675 final int parentLaunchMode = parent.info.launchMode; 3676 final int destIntentFlags = destIntent.getFlags(); 3677 if (parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_INSTANCE || 3678 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TASK || 3679 parentLaunchMode == ActivityInfo.LAUNCH_SINGLE_TOP || 3680 (destIntentFlags & Intent.FLAG_ACTIVITY_CLEAR_TOP) != 0) { 3681 parent.deliverNewIntentLocked(srec.info.applicationInfo.uid, destIntent, 3682 srec.packageName); 3683 } else { 3684 try { 3685 ActivityInfo aInfo = AppGlobals.getPackageManager().getActivityInfo( 3686 destIntent.getComponent(), 0, srec.userId); 3687 int res = mService.mActivityStarter.startActivityLocked(srec.app.thread, 3688 destIntent, null /*ephemeralIntent*/, null, aInfo, null /*rInfo*/, null, 3689 null, parent.appToken, null, 0, -1, parent.launchedFromUid, 3690 parent.launchedFromPackage, -1, parent.launchedFromUid, 0, null, 3691 false, true, null, null, null); 3692 foundParentInTask = res == ActivityManager.START_SUCCESS; 3693 } catch (RemoteException e) { 3694 foundParentInTask = false; 3695 } 3696 requestFinishActivityLocked(parent.appToken, resultCode, 3697 resultData, "navigate-top", true); 3698 } 3699 } 3700 Binder.restoreCallingIdentity(origId); 3701 return foundParentInTask; 3702 } 3703 /** 3704 * Perform the common clean-up of an activity record. This is called both 3705 * as part of destroyActivityLocked() (when destroying the client-side 3706 * representation) and cleaning things up as a result of its hosting 3707 * processing going away, in which case there is no remaining client-side 3708 * state to destroy so only the cleanup here is needed. 3709 * 3710 * Note: Call before #removeActivityFromHistoryLocked. 3711 */ 3712 final void cleanUpActivityLocked(ActivityRecord r, boolean cleanServices, 3713 boolean setState) { 3714 if (mResumedActivity == r) { 3715 mResumedActivity = null; 3716 } 3717 if (mPausingActivity == r) { 3718 mPausingActivity = null; 3719 } 3720 mService.resetFocusedActivityIfNeededLocked(r); 3721 3722 r.deferRelaunchUntilPaused = false; 3723 r.frozenBeforeDestroy = false; 3724 3725 if (setState) { 3726 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (cleaning up)"); 3727 r.state = ActivityState.DESTROYED; 3728 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + r); 3729 r.app = null; 3730 } 3731 3732 // Make sure this record is no longer in the pending finishes list. 3733 // This could happen, for example, if we are trimming activities 3734 // down to the max limit while they are still waiting to finish. 3735 mStackSupervisor.mFinishingActivities.remove(r); 3736 mStackSupervisor.mWaitingVisibleActivities.remove(r); 3737 3738 // Remove any pending results. 3739 if (r.finishing && r.pendingResults != null) { 3740 for (WeakReference<PendingIntentRecord> apr : r.pendingResults) { 3741 PendingIntentRecord rec = apr.get(); 3742 if (rec != null) { 3743 mService.cancelIntentSenderLocked(rec, false); 3744 } 3745 } 3746 r.pendingResults = null; 3747 } 3748 3749 if (cleanServices) { 3750 cleanUpActivityServicesLocked(r); 3751 } 3752 3753 // Get rid of any pending idle timeouts. 3754 removeTimeoutsForActivityLocked(r); 3755 if (getVisibleBehindActivity() == r) { 3756 mStackSupervisor.requestVisibleBehindLocked(r, false); 3757 } 3758 } 3759 3760 private void removeTimeoutsForActivityLocked(ActivityRecord r) { 3761 mStackSupervisor.removeTimeoutsForActivityLocked(r); 3762 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 3763 mHandler.removeMessages(STOP_TIMEOUT_MSG, r); 3764 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 3765 r.finishLaunchTickingLocked(); 3766 } 3767 3768 private void removeActivityFromHistoryLocked( 3769 ActivityRecord r, TaskRecord oldTop, String reason) { 3770 mStackSupervisor.removeChildActivityContainers(r); 3771 finishActivityResultsLocked(r, Activity.RESULT_CANCELED, null); 3772 r.makeFinishingLocked(); 3773 if (DEBUG_ADD_REMOVE) Slog.i(TAG_ADD_REMOVE, 3774 "Removing activity " + r + " from stack callers=" + Debug.getCallers(5)); 3775 3776 r.takeFromHistory(); 3777 removeTimeoutsForActivityLocked(r); 3778 if (DEBUG_STATES) Slog.v(TAG_STATES, 3779 "Moving to DESTROYED: " + r + " (removed from history)"); 3780 r.state = ActivityState.DESTROYED; 3781 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + r); 3782 r.app = null; 3783 mWindowManager.removeAppToken(r.appToken); 3784 if (VALIDATE_TOKENS) { 3785 validateAppTokensLocked(); 3786 } 3787 final TaskRecord task = r.task; 3788 final TaskRecord topTask = oldTop != null ? oldTop : topTask(); 3789 if (task != null && task.removeActivity(r)) { 3790 if (DEBUG_STACK) Slog.i(TAG_STACK, 3791 "removeActivityFromHistoryLocked: last activity removed from " + this); 3792 if (mStackSupervisor.isFocusedStack(this) && task == topTask && 3793 task.isOverHomeStack()) { 3794 mStackSupervisor.moveHomeStackTaskToTop(task.getTaskToReturnTo(), reason); 3795 } 3796 removeTask(task, reason); 3797 } 3798 cleanUpActivityServicesLocked(r); 3799 r.removeUriPermissionsLocked(); 3800 } 3801 3802 /** 3803 * Perform clean-up of service connections in an activity record. 3804 */ 3805 final void cleanUpActivityServicesLocked(ActivityRecord r) { 3806 // Throw away any services that have been bound by this activity. 3807 if (r.connections != null) { 3808 Iterator<ConnectionRecord> it = r.connections.iterator(); 3809 while (it.hasNext()) { 3810 ConnectionRecord c = it.next(); 3811 mService.mServices.removeConnectionLocked(c, null, r); 3812 } 3813 r.connections = null; 3814 } 3815 } 3816 3817 final void scheduleDestroyActivities(ProcessRecord owner, String reason) { 3818 Message msg = mHandler.obtainMessage(DESTROY_ACTIVITIES_MSG); 3819 msg.obj = new ScheduleDestroyArgs(owner, reason); 3820 mHandler.sendMessage(msg); 3821 } 3822 3823 final void destroyActivitiesLocked(ProcessRecord owner, String reason) { 3824 boolean lastIsOpaque = false; 3825 boolean activityRemoved = false; 3826 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 3827 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 3828 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 3829 final ActivityRecord r = activities.get(activityNdx); 3830 if (r.finishing) { 3831 continue; 3832 } 3833 if (r.fullscreen) { 3834 lastIsOpaque = true; 3835 } 3836 if (owner != null && r.app != owner) { 3837 continue; 3838 } 3839 if (!lastIsOpaque) { 3840 continue; 3841 } 3842 if (r.isDestroyable()) { 3843 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "Destroying " + r + " in state " + r.state 3844 + " resumed=" + mResumedActivity 3845 + " pausing=" + mPausingActivity + " for reason " + reason); 3846 if (destroyActivityLocked(r, true, reason)) { 3847 activityRemoved = true; 3848 } 3849 } 3850 } 3851 } 3852 if (activityRemoved) { 3853 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 3854 } 3855 } 3856 3857 final boolean safelyDestroyActivityLocked(ActivityRecord r, String reason) { 3858 if (r.isDestroyable()) { 3859 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 3860 "Destroying " + r + " in state " + r.state + " resumed=" + mResumedActivity 3861 + " pausing=" + mPausingActivity + " for reason " + reason); 3862 return destroyActivityLocked(r, true, reason); 3863 } 3864 return false; 3865 } 3866 3867 final int releaseSomeActivitiesLocked(ProcessRecord app, ArraySet<TaskRecord> tasks, 3868 String reason) { 3869 // Iterate over tasks starting at the back (oldest) first. 3870 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Trying to release some activities in " + app); 3871 int maxTasks = tasks.size() / 4; 3872 if (maxTasks < 1) { 3873 maxTasks = 1; 3874 } 3875 int numReleased = 0; 3876 for (int taskNdx = 0; taskNdx < mTaskHistory.size() && maxTasks > 0; taskNdx++) { 3877 final TaskRecord task = mTaskHistory.get(taskNdx); 3878 if (!tasks.contains(task)) { 3879 continue; 3880 } 3881 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, "Looking for activities to release in " + task); 3882 int curNum = 0; 3883 final ArrayList<ActivityRecord> activities = task.mActivities; 3884 for (int actNdx = 0; actNdx < activities.size(); actNdx++) { 3885 final ActivityRecord activity = activities.get(actNdx); 3886 if (activity.app == app && activity.isDestroyable()) { 3887 if (DEBUG_RELEASE) Slog.v(TAG_RELEASE, "Destroying " + activity 3888 + " in state " + activity.state + " resumed=" + mResumedActivity 3889 + " pausing=" + mPausingActivity + " for reason " + reason); 3890 destroyActivityLocked(activity, true, reason); 3891 if (activities.get(actNdx) != activity) { 3892 // Was removed from list, back up so we don't miss the next one. 3893 actNdx--; 3894 } 3895 curNum++; 3896 } 3897 } 3898 if (curNum > 0) { 3899 numReleased += curNum; 3900 maxTasks--; 3901 if (mTaskHistory.get(taskNdx) != task) { 3902 // The entire task got removed, back up so we don't miss the next one. 3903 taskNdx--; 3904 } 3905 } 3906 } 3907 if (DEBUG_RELEASE) Slog.d(TAG_RELEASE, 3908 "Done releasing: did " + numReleased + " activities"); 3909 return numReleased; 3910 } 3911 3912 /** 3913 * Destroy the current CLIENT SIDE instance of an activity. This may be 3914 * called both when actually finishing an activity, or when performing 3915 * a configuration switch where we destroy the current client-side object 3916 * but then create a new client-side object for this same HistoryRecord. 3917 */ 3918 final boolean destroyActivityLocked(ActivityRecord r, boolean removeFromApp, String reason) { 3919 if (DEBUG_SWITCH || DEBUG_CLEANUP) Slog.v(TAG_SWITCH, 3920 "Removing activity from " + reason + ": token=" + r 3921 + ", app=" + (r.app != null ? r.app.processName : "(null)")); 3922 EventLog.writeEvent(EventLogTags.AM_DESTROY_ACTIVITY, 3923 r.userId, System.identityHashCode(r), 3924 r.task.taskId, r.shortComponentName, reason); 3925 3926 boolean removedFromHistory = false; 3927 3928 // If the activity is finishing, it's no longer considered in topRunningActivityLocked, 3929 // and cleanUpActivityLocked() may change focus to another activity (or task). 3930 // Get the current top task now, as removeActivityFromHistoryLocked() below need this 3931 // to decide whether to return to home stack after removal. 3932 final TaskRecord topTask = topTask(); 3933 3934 cleanUpActivityLocked(r, false, false); 3935 3936 final boolean hadApp = r.app != null; 3937 3938 if (hadApp) { 3939 if (removeFromApp) { 3940 r.app.activities.remove(r); 3941 if (mService.mHeavyWeightProcess == r.app && r.app.activities.size() <= 0) { 3942 mService.mHeavyWeightProcess = null; 3943 mService.mHandler.sendEmptyMessage( 3944 ActivityManagerService.CANCEL_HEAVY_NOTIFICATION_MSG); 3945 } 3946 if (r.app.activities.isEmpty()) { 3947 // Update any services we are bound to that might care about whether 3948 // their client may have activities. 3949 mService.mServices.updateServiceConnectionActivitiesLocked(r.app); 3950 // No longer have activities, so update LRU list and oom adj. 3951 mService.updateLruProcessLocked(r.app, false, null); 3952 mService.updateOomAdjLocked(); 3953 } 3954 } 3955 3956 boolean skipDestroy = false; 3957 3958 try { 3959 if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + r); 3960 r.app.thread.scheduleDestroyActivity(r.appToken, r.finishing, 3961 r.configChangeFlags); 3962 } catch (Exception e) { 3963 // We can just ignore exceptions here... if the process 3964 // has crashed, our death notification will clean things 3965 // up. 3966 //Slog.w(TAG, "Exception thrown during finish", e); 3967 if (r.finishing) { 3968 removeActivityFromHistoryLocked( 3969 r, topTask, reason + " exceptionInScheduleDestroy"); 3970 removedFromHistory = true; 3971 skipDestroy = true; 3972 } 3973 } 3974 3975 r.nowVisible = false; 3976 3977 // If the activity is finishing, we need to wait on removing it 3978 // from the list to give it a chance to do its cleanup. During 3979 // that time it may make calls back with its token so we need to 3980 // be able to find it on the list and so we don't want to remove 3981 // it from the list yet. Otherwise, we can just immediately put 3982 // it in the destroyed state since we are not removing it from the 3983 // list. 3984 if (r.finishing && !skipDestroy) { 3985 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYING: " + r 3986 + " (destroy requested)"); 3987 r.state = ActivityState.DESTROYING; 3988 Message msg = mHandler.obtainMessage(DESTROY_TIMEOUT_MSG, r); 3989 mHandler.sendMessageDelayed(msg, DESTROY_TIMEOUT); 3990 } else { 3991 if (DEBUG_STATES) Slog.v(TAG_STATES, 3992 "Moving to DESTROYED: " + r + " (destroy skipped)"); 3993 r.state = ActivityState.DESTROYED; 3994 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 3995 r.app = null; 3996 } 3997 } else { 3998 // remove this record from the history. 3999 if (r.finishing) { 4000 removeActivityFromHistoryLocked(r, topTask, reason + " hadNoApp"); 4001 removedFromHistory = true; 4002 } else { 4003 if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + r + " (no app)"); 4004 r.state = ActivityState.DESTROYED; 4005 if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + r); 4006 r.app = null; 4007 } 4008 } 4009 4010 r.configChangeFlags = 0; 4011 4012 if (!mLRUActivities.remove(r) && hadApp) { 4013 Slog.w(TAG, "Activity " + r + " being finished, but not in LRU list"); 4014 } 4015 4016 return removedFromHistory; 4017 } 4018 4019 final void activityDestroyedLocked(IBinder token, String reason) { 4020 final long origId = Binder.clearCallingIdentity(); 4021 try { 4022 ActivityRecord r = ActivityRecord.forTokenLocked(token); 4023 if (r != null) { 4024 mHandler.removeMessages(DESTROY_TIMEOUT_MSG, r); 4025 } 4026 if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + r); 4027 4028 if (isInStackLocked(r) != null) { 4029 if (r.state == ActivityState.DESTROYING) { 4030 cleanUpActivityLocked(r, true, false); 4031 removeActivityFromHistoryLocked(r, null, reason); 4032 } 4033 } 4034 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4035 } finally { 4036 Binder.restoreCallingIdentity(origId); 4037 } 4038 } 4039 4040 void releaseBackgroundResources(ActivityRecord r) { 4041 if (hasVisibleBehindActivity() && 4042 !mHandler.hasMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG)) { 4043 if (r == topRunningActivityLocked() 4044 && getStackVisibilityLocked(null) == STACK_VISIBLE) { 4045 // Don't release the top activity if it has requested to run behind the next 4046 // activity and the stack is currently visible. 4047 return; 4048 } 4049 if (DEBUG_STATES) Slog.d(TAG_STATES, "releaseBackgroundResources activtyDisplay=" + 4050 mActivityContainer.mActivityDisplay + " visibleBehind=" + r + " app=" + r.app + 4051 " thread=" + r.app.thread); 4052 if (r != null && r.app != null && r.app.thread != null) { 4053 try { 4054 r.app.thread.scheduleCancelVisibleBehind(r.appToken); 4055 } catch (RemoteException e) { 4056 } 4057 mHandler.sendEmptyMessageDelayed(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG, 500); 4058 } else { 4059 Slog.e(TAG, "releaseBackgroundResources: activity " + r + " no longer running"); 4060 backgroundResourcesReleased(); 4061 } 4062 } 4063 } 4064 4065 final void backgroundResourcesReleased() { 4066 mHandler.removeMessages(RELEASE_BACKGROUND_RESOURCES_TIMEOUT_MSG); 4067 final ActivityRecord r = getVisibleBehindActivity(); 4068 if (r != null) { 4069 mStackSupervisor.mStoppingActivities.add(r); 4070 setVisibleBehindActivity(null); 4071 mStackSupervisor.scheduleIdleTimeoutLocked(null); 4072 } 4073 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4074 } 4075 4076 boolean hasVisibleBehindActivity() { 4077 return isAttached() && mActivityContainer.mActivityDisplay.hasVisibleBehindActivity(); 4078 } 4079 4080 void setVisibleBehindActivity(ActivityRecord r) { 4081 if (isAttached()) { 4082 mActivityContainer.mActivityDisplay.setVisibleBehindActivity(r); 4083 } 4084 } 4085 4086 ActivityRecord getVisibleBehindActivity() { 4087 return isAttached() ? mActivityContainer.mActivityDisplay.mVisibleBehindActivity : null; 4088 } 4089 4090 private void removeHistoryRecordsForAppLocked(ArrayList<ActivityRecord> list, 4091 ProcessRecord app, String listName) { 4092 int i = list.size(); 4093 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4094 "Removing app " + app + " from list " + listName + " with " + i + " entries"); 4095 while (i > 0) { 4096 i--; 4097 ActivityRecord r = list.get(i); 4098 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "Record #" + i + " " + r); 4099 if (r.app == app) { 4100 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, "---> REMOVING this entry!"); 4101 list.remove(i); 4102 removeTimeoutsForActivityLocked(r); 4103 } 4104 } 4105 } 4106 4107 boolean removeHistoryRecordsForAppLocked(ProcessRecord app) { 4108 removeHistoryRecordsForAppLocked(mLRUActivities, app, "mLRUActivities"); 4109 removeHistoryRecordsForAppLocked(mStackSupervisor.mStoppingActivities, app, 4110 "mStoppingActivities"); 4111 removeHistoryRecordsForAppLocked(mStackSupervisor.mGoingToSleepActivities, app, 4112 "mGoingToSleepActivities"); 4113 removeHistoryRecordsForAppLocked(mStackSupervisor.mWaitingVisibleActivities, app, 4114 "mWaitingVisibleActivities"); 4115 removeHistoryRecordsForAppLocked(mStackSupervisor.mFinishingActivities, app, 4116 "mFinishingActivities"); 4117 4118 boolean hasVisibleActivities = false; 4119 4120 // Clean out the history list. 4121 int i = numActivities(); 4122 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4123 "Removing app " + app + " from history with " + i + " entries"); 4124 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4125 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4126 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4127 final ActivityRecord r = activities.get(activityNdx); 4128 --i; 4129 if (DEBUG_CLEANUP) Slog.v(TAG_CLEANUP, 4130 "Record #" + i + " " + r + ": app=" + r.app); 4131 if (r.app == app) { 4132 if (r.visible) { 4133 hasVisibleActivities = true; 4134 } 4135 final boolean remove; 4136 if ((!r.haveState && !r.stateNotNeeded) || r.finishing) { 4137 // Don't currently have state for the activity, or 4138 // it is finishing -- always remove it. 4139 remove = true; 4140 } else if (!r.visible && r.launchCount > 2 && 4141 r.lastLaunchTime > (SystemClock.uptimeMillis() - 60000)) { 4142 // We have launched this activity too many times since it was 4143 // able to run, so give up and remove it. 4144 // (Note if the activity is visible, we don't remove the record. 4145 // We leave the dead window on the screen but the process will 4146 // not be restarted unless user explicitly tap on it.) 4147 remove = true; 4148 } else { 4149 // The process may be gone, but the activity lives on! 4150 remove = false; 4151 } 4152 if (remove) { 4153 if (DEBUG_ADD_REMOVE || DEBUG_CLEANUP) Slog.i(TAG_ADD_REMOVE, 4154 "Removing activity " + r + " from stack at " + i 4155 + ": haveState=" + r.haveState 4156 + " stateNotNeeded=" + r.stateNotNeeded 4157 + " finishing=" + r.finishing 4158 + " state=" + r.state + " callers=" + Debug.getCallers(5)); 4159 if (!r.finishing) { 4160 Slog.w(TAG, "Force removing " + r + ": app died, no saved state"); 4161 EventLog.writeEvent(EventLogTags.AM_FINISH_ACTIVITY, 4162 r.userId, System.identityHashCode(r), 4163 r.task.taskId, r.shortComponentName, 4164 "proc died without state saved"); 4165 if (r.state == ActivityState.RESUMED) { 4166 mService.updateUsageStats(r, false); 4167 } 4168 } 4169 } else { 4170 // We have the current state for this activity, so 4171 // it can be restarted later when needed. 4172 if (DEBUG_ALL) Slog.v(TAG, "Keeping entry, setting app to null"); 4173 if (DEBUG_APP) Slog.v(TAG_APP, 4174 "Clearing app during removeHistory for activity " + r); 4175 r.app = null; 4176 // Set nowVisible to previous visible state. If the app was visible while 4177 // it died, we leave the dead window on screen so it's basically visible. 4178 // This is needed when user later tap on the dead window, we need to stop 4179 // other apps when user transfers focus to the restarted activity. 4180 r.nowVisible = r.visible; 4181 if (!r.haveState) { 4182 if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, 4183 "App died, clearing saved state of " + r); 4184 r.icicle = null; 4185 } 4186 } 4187 cleanUpActivityLocked(r, true, true); 4188 if (remove) { 4189 removeActivityFromHistoryLocked(r, null, "appDied"); 4190 } 4191 } 4192 } 4193 } 4194 4195 return hasVisibleActivities; 4196 } 4197 4198 final void updateTransitLocked(int transit, ActivityOptions options) { 4199 if (options != null) { 4200 ActivityRecord r = topRunningActivityLocked(); 4201 if (r != null && r.state != ActivityState.RESUMED) { 4202 r.updateOptionsLocked(options); 4203 } else { 4204 ActivityOptions.abort(options); 4205 } 4206 } 4207 mWindowManager.prepareAppTransition(transit, false); 4208 } 4209 4210 void updateTaskMovement(TaskRecord task, boolean toFront) { 4211 if (task.isPersistable) { 4212 task.mLastTimeMoved = System.currentTimeMillis(); 4213 // Sign is used to keep tasks sorted when persisted. Tasks sent to the bottom most 4214 // recently will be most negative, tasks sent to the bottom before that will be less 4215 // negative. Similarly for recent tasks moved to the top which will be most positive. 4216 if (!toFront) { 4217 task.mLastTimeMoved *= -1; 4218 } 4219 } 4220 mStackSupervisor.invalidateTaskLayers(); 4221 } 4222 4223 void moveHomeStackTaskToTop(int homeStackTaskType) { 4224 final int top = mTaskHistory.size() - 1; 4225 for (int taskNdx = top; taskNdx >= 0; --taskNdx) { 4226 final TaskRecord task = mTaskHistory.get(taskNdx); 4227 if (task.taskType == homeStackTaskType) { 4228 if (DEBUG_TASKS || DEBUG_STACK) Slog.d(TAG_STACK, 4229 "moveHomeStackTaskToTop: moving " + task); 4230 mTaskHistory.remove(taskNdx); 4231 mTaskHistory.add(top, task); 4232 updateTaskMovement(task, true); 4233 return; 4234 } 4235 } 4236 } 4237 4238 final void moveTaskToFrontLocked(TaskRecord tr, boolean noAnimation, ActivityOptions options, 4239 AppTimeTracker timeTracker, String reason) { 4240 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "moveTaskToFront: " + tr); 4241 4242 final int numTasks = mTaskHistory.size(); 4243 final int index = mTaskHistory.indexOf(tr); 4244 if (numTasks == 0 || index < 0) { 4245 // nothing to do! 4246 if (noAnimation) { 4247 ActivityOptions.abort(options); 4248 } else { 4249 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4250 } 4251 return; 4252 } 4253 4254 if (timeTracker != null) { 4255 // The caller wants a time tracker associated with this task. 4256 for (int i = tr.mActivities.size() - 1; i >= 0; i--) { 4257 tr.mActivities.get(i).appTimeTracker = timeTracker; 4258 } 4259 } 4260 4261 // Shift all activities with this task up to the top 4262 // of the stack, keeping them in the same internal order. 4263 insertTaskAtTop(tr, null); 4264 4265 // Don't refocus if invisible to current user 4266 ActivityRecord top = tr.getTopActivity(); 4267 if (!okToShowLocked(top)) { 4268 addRecentActivityLocked(top); 4269 ActivityOptions.abort(options); 4270 return; 4271 } 4272 4273 // Set focus to the top running activity of this stack. 4274 ActivityRecord r = topRunningActivityLocked(); 4275 mService.setFocusedActivityLocked(r, reason); 4276 4277 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to front transition: task=" + tr); 4278 if (noAnimation) { 4279 mWindowManager.prepareAppTransition(TRANSIT_NONE, false); 4280 if (r != null) { 4281 mNoAnimActivities.add(r); 4282 } 4283 ActivityOptions.abort(options); 4284 } else { 4285 updateTransitLocked(TRANSIT_TASK_TO_FRONT, options); 4286 } 4287 4288 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4289 EventLog.writeEvent(EventLogTags.AM_TASK_TO_FRONT, tr.userId, tr.taskId); 4290 4291 if (VALIDATE_TOKENS) { 4292 validateAppTokensLocked(); 4293 } 4294 } 4295 4296 /** 4297 * Worker method for rearranging history stack. Implements the function of moving all 4298 * activities for a specific task (gathering them if disjoint) into a single group at the 4299 * bottom of the stack. 4300 * 4301 * If a watcher is installed, the action is preflighted and the watcher has an opportunity 4302 * to premeptively cancel the move. 4303 * 4304 * @param taskId The taskId to collect and move to the bottom. 4305 * @return Returns true if the move completed, false if not. 4306 */ 4307 final boolean moveTaskToBackLocked(int taskId) { 4308 final TaskRecord tr = taskForIdLocked(taskId); 4309 if (tr == null) { 4310 Slog.i(TAG, "moveTaskToBack: bad taskId=" + taskId); 4311 return false; 4312 } 4313 4314 Slog.i(TAG, "moveTaskToBack: " + tr); 4315 mStackSupervisor.removeLockedTaskLocked(tr); 4316 4317 // If we have a watcher, preflight the move before committing to it. First check 4318 // for *other* available tasks, but if none are available, then try again allowing the 4319 // current task to be selected. 4320 if (mStackSupervisor.isFrontStack(this) && mService.mController != null) { 4321 ActivityRecord next = topRunningActivityLocked(null, taskId); 4322 if (next == null) { 4323 next = topRunningActivityLocked(null, 0); 4324 } 4325 if (next != null) { 4326 // ask watcher if this is allowed 4327 boolean moveOK = true; 4328 try { 4329 moveOK = mService.mController.activityResuming(next.packageName); 4330 } catch (RemoteException e) { 4331 mService.mController = null; 4332 Watchdog.getInstance().setActivityController(null); 4333 } 4334 if (!moveOK) { 4335 return false; 4336 } 4337 } 4338 } 4339 4340 if (DEBUG_TRANSITION) Slog.v(TAG_TRANSITION, "Prepare to back transition: task=" + taskId); 4341 4342 if (mStackId == HOME_STACK_ID && topTask().isHomeTask()) { 4343 // For the case where we are moving the home task back and there is an activity visible 4344 // behind it on the fullscreen stack, we want to move the focus to the visible behind 4345 // activity to maintain order with what the user is seeing. 4346 final ActivityStack fullscreenStack = 4347 mStackSupervisor.getStack(FULLSCREEN_WORKSPACE_STACK_ID); 4348 if (fullscreenStack != null && fullscreenStack.hasVisibleBehindActivity()) { 4349 final ActivityRecord visibleBehind = fullscreenStack.getVisibleBehindActivity(); 4350 mService.setFocusedActivityLocked(visibleBehind, "moveTaskToBack"); 4351 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4352 return true; 4353 } 4354 } 4355 4356 boolean prevIsHome = false; 4357 4358 // If true, we should resume the home activity next if the task we are moving to the 4359 // back is over the home stack. We force to false if the task we are moving to back 4360 // is the home task and we don't want it resumed after moving to the back. 4361 final boolean canGoHome = !tr.isHomeTask() && tr.isOverHomeStack(); 4362 if (canGoHome) { 4363 final TaskRecord nextTask = getNextTask(tr); 4364 if (nextTask != null) { 4365 nextTask.setTaskToReturnTo(tr.getTaskToReturnTo()); 4366 } else { 4367 prevIsHome = true; 4368 } 4369 } 4370 mTaskHistory.remove(tr); 4371 mTaskHistory.add(0, tr); 4372 updateTaskMovement(tr, false); 4373 4374 // There is an assumption that moving a task to the back moves it behind the home activity. 4375 // We make sure here that some activity in the stack will launch home. 4376 int numTasks = mTaskHistory.size(); 4377 for (int taskNdx = numTasks - 1; taskNdx >= 1; --taskNdx) { 4378 final TaskRecord task = mTaskHistory.get(taskNdx); 4379 if (task.isOverHomeStack()) { 4380 break; 4381 } 4382 if (taskNdx == 1) { 4383 // Set the last task before tr to go to home. 4384 task.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 4385 } 4386 } 4387 4388 mWindowManager.prepareAppTransition(TRANSIT_TASK_TO_BACK, false); 4389 mWindowManager.moveTaskToBottom(taskId); 4390 4391 if (VALIDATE_TOKENS) { 4392 validateAppTokensLocked(); 4393 } 4394 4395 final TaskRecord task = mResumedActivity != null ? mResumedActivity.task : null; 4396 if (prevIsHome || (task == tr && canGoHome) || (numTasks <= 1 && isOnHomeDisplay())) { 4397 if (!mService.mBooting && !mService.mBooted) { 4398 // Not ready yet! 4399 return false; 4400 } 4401 final int taskToReturnTo = tr.getTaskToReturnTo(); 4402 tr.setTaskToReturnTo(APPLICATION_ACTIVITY_TYPE); 4403 return mStackSupervisor.resumeHomeStackTask(taskToReturnTo, null, "moveTaskToBack"); 4404 } 4405 4406 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4407 return true; 4408 } 4409 4410 static final void logStartActivity(int tag, ActivityRecord r, 4411 TaskRecord task) { 4412 final Uri data = r.intent.getData(); 4413 final String strData = data != null ? data.toSafeString() : null; 4414 4415 EventLog.writeEvent(tag, 4416 r.userId, System.identityHashCode(r), task.taskId, 4417 r.shortComponentName, r.intent.getAction(), 4418 r.intent.getType(), strData, r.intent.getFlags()); 4419 } 4420 4421 /** 4422 * Ensures all visible activities at or below the input activity have the right configuration. 4423 */ 4424 void ensureVisibleActivitiesConfigurationLocked(ActivityRecord start, boolean preserveWindow) { 4425 if (start == null || !start.visible) { 4426 return; 4427 } 4428 4429 final TaskRecord startTask = start.task; 4430 boolean behindFullscreen = false; 4431 boolean updatedConfig = false; 4432 4433 for (int taskIndex = mTaskHistory.indexOf(startTask); taskIndex >= 0; --taskIndex) { 4434 final TaskRecord task = mTaskHistory.get(taskIndex); 4435 final ArrayList<ActivityRecord> activities = task.mActivities; 4436 int activityIndex = 4437 (start.task == task) ? activities.indexOf(start) : activities.size() - 1; 4438 for (; activityIndex >= 0; --activityIndex) { 4439 final ActivityRecord r = activities.get(activityIndex); 4440 updatedConfig |= ensureActivityConfigurationLocked(r, 0, preserveWindow); 4441 if (r.fullscreen) { 4442 behindFullscreen = true; 4443 break; 4444 } 4445 } 4446 if (behindFullscreen) { 4447 break; 4448 } 4449 } 4450 if (updatedConfig) { 4451 // Ensure the resumed state of the focus activity if we updated the confiugaration of 4452 // any activity. 4453 mStackSupervisor.resumeFocusedStackTopActivityLocked(); 4454 } 4455 } 4456 4457 /** 4458 * Make sure the given activity matches the current configuration. Returns false if the activity 4459 * had to be destroyed. Returns true if the configuration is the same, or the activity will 4460 * remain running as-is for whatever reason. Ensures the HistoryRecord is updated with the 4461 * correct configuration and all other bookkeeping is handled. 4462 */ 4463 boolean ensureActivityConfigurationLocked( 4464 ActivityRecord r, int globalChanges, boolean preserveWindow) { 4465 if (mConfigWillChange) { 4466 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4467 "Skipping config check (will change): " + r); 4468 return true; 4469 } 4470 4471 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4472 "Ensuring correct configuration: " + r); 4473 4474 // Short circuit: if the two configurations are equal (the common case), then there is 4475 // nothing to do. 4476 final Configuration newConfig = mService.mConfiguration; 4477 r.task.sanitizeOverrideConfiguration(newConfig); 4478 final Configuration taskConfig = r.task.mOverrideConfig; 4479 if (r.configuration.equals(newConfig) 4480 && r.taskConfigOverride.equals(taskConfig) 4481 && !r.forceNewConfig) { 4482 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4483 "Configuration unchanged in " + r); 4484 return true; 4485 } 4486 4487 // We don't worry about activities that are finishing. 4488 if (r.finishing) { 4489 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4490 "Configuration doesn't matter in finishing " + r); 4491 r.stopFreezingScreenLocked(false); 4492 return true; 4493 } 4494 4495 // Okay we now are going to make this activity have the new config. 4496 // But then we need to figure out how it needs to deal with that. 4497 final Configuration oldConfig = r.configuration; 4498 final Configuration oldTaskOverride = r.taskConfigOverride; 4499 r.configuration = newConfig; 4500 r.taskConfigOverride = taskConfig; 4501 4502 int taskChanges = getTaskConfigurationChanges(r, taskConfig, oldTaskOverride); 4503 final int changes = oldConfig.diff(newConfig) | taskChanges; 4504 if (changes == 0 && !r.forceNewConfig) { 4505 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4506 "Configuration no differences in " + r); 4507 // There are no significant differences, so we won't relaunch but should still deliver 4508 // the new configuration to the client process. 4509 r.scheduleConfigurationChanged(taskConfig, true); 4510 return true; 4511 } 4512 4513 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4514 "Configuration changes for " + r + " ; taskChanges=" 4515 + Configuration.configurationDiffToString(taskChanges) + ", allChanges=" 4516 + Configuration.configurationDiffToString(changes)); 4517 4518 // If the activity isn't currently running, just leave the new 4519 // configuration and it will pick that up next time it starts. 4520 if (r.app == null || r.app.thread == null) { 4521 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4522 "Configuration doesn't matter not running " + r); 4523 r.stopFreezingScreenLocked(false); 4524 r.forceNewConfig = false; 4525 return true; 4526 } 4527 4528 // Figure out how to handle the changes between the configurations. 4529 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4530 "Checking to restart " + r.info.name + ": changed=0x" 4531 + Integer.toHexString(changes) + ", handles=0x" 4532 + Integer.toHexString(r.info.getRealConfigChanged()) + ", newConfig=" + newConfig 4533 + ", taskConfig=" + taskConfig); 4534 4535 if ((changes&(~r.info.getRealConfigChanged())) != 0 || r.forceNewConfig) { 4536 // Aha, the activity isn't handling the change, so DIE DIE DIE. 4537 r.configChangeFlags |= changes; 4538 r.startFreezingScreenLocked(r.app, globalChanges); 4539 r.forceNewConfig = false; 4540 preserveWindow &= isResizeOnlyChange(changes); 4541 if (r.app == null || r.app.thread == null) { 4542 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4543 "Config is destroying non-running " + r); 4544 destroyActivityLocked(r, true, "config"); 4545 } else if (r.state == ActivityState.PAUSING) { 4546 // A little annoying: we are waiting for this activity to finish pausing. Let's not 4547 // do anything now, but just flag that it needs to be restarted when done pausing. 4548 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4549 "Config is skipping already pausing " + r); 4550 r.deferRelaunchUntilPaused = true; 4551 r.preserveWindowOnDeferredRelaunch = preserveWindow; 4552 return true; 4553 } else if (r.state == ActivityState.RESUMED) { 4554 // Try to optimize this case: the configuration is changing and we need to restart 4555 // the top, resumed activity. Instead of doing the normal handshaking, just say 4556 // "restart!". 4557 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4558 "Config is relaunching resumed " + r); 4559 4560 if (DEBUG_STATES && !r.visible) { 4561 Slog.v(TAG_STATES, "Config is relaunching resumed invisible activity " + r 4562 + " called by " + Debug.getCallers(4)); 4563 } 4564 4565 relaunchActivityLocked(r, r.configChangeFlags, true, preserveWindow); 4566 } else { 4567 if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, 4568 "Config is relaunching non-resumed " + r); 4569 relaunchActivityLocked(r, r.configChangeFlags, false, preserveWindow); 4570 } 4571 4572 // All done... tell the caller we weren't able to keep this activity around. 4573 return false; 4574 } 4575 4576 // Default case: the activity can handle this new configuration, so hand it over. 4577 // NOTE: We only forward the task override configuration as the system level configuration 4578 // changes is always sent to all processes when they happen so it can just use whatever 4579 // system level configuration it last got. 4580 r.scheduleConfigurationChanged(taskConfig, true); 4581 r.stopFreezingScreenLocked(false); 4582 4583 return true; 4584 } 4585 4586 private int getTaskConfigurationChanges(ActivityRecord record, Configuration taskConfig, 4587 Configuration oldTaskOverride) { 4588 4589 // If we went from full-screen to non-full-screen, make sure to use the correct 4590 // configuration task diff, so the diff stays as small as possible. 4591 if (Configuration.EMPTY.equals(oldTaskOverride) 4592 && !Configuration.EMPTY.equals(taskConfig)) { 4593 oldTaskOverride = record.task.extractOverrideConfig(record.configuration); 4594 } 4595 4596 // Conversely, do the same when going the other direction. 4597 if (Configuration.EMPTY.equals(taskConfig) 4598 && !Configuration.EMPTY.equals(oldTaskOverride)) { 4599 taskConfig = record.task.extractOverrideConfig(record.configuration); 4600 } 4601 4602 // Determine what has changed. May be nothing, if this is a config 4603 // that has come back from the app after going idle. In that case 4604 // we just want to leave the official config object now in the 4605 // activity and do nothing else. 4606 int taskChanges = oldTaskOverride.diff(taskConfig); 4607 // We don't want to use size changes if they don't cross boundaries that are important to 4608 // the app. 4609 if ((taskChanges & CONFIG_SCREEN_SIZE) != 0) { 4610 final boolean crosses = record.crossesHorizontalSizeThreshold( 4611 oldTaskOverride.screenWidthDp, taskConfig.screenWidthDp) 4612 || record.crossesVerticalSizeThreshold( 4613 oldTaskOverride.screenHeightDp, taskConfig.screenHeightDp); 4614 if (!crosses) { 4615 taskChanges &= ~CONFIG_SCREEN_SIZE; 4616 } 4617 } 4618 if ((taskChanges & CONFIG_SMALLEST_SCREEN_SIZE) != 0) { 4619 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4620 final int newSmallest = taskConfig.smallestScreenWidthDp; 4621 if (!record.crossesSmallestSizeThreshold(oldSmallest, newSmallest)) { 4622 taskChanges &= ~CONFIG_SMALLEST_SCREEN_SIZE; 4623 } 4624 } 4625 return catchConfigChangesFromUnset(taskConfig, oldTaskOverride, taskChanges); 4626 } 4627 4628 private static int catchConfigChangesFromUnset(Configuration taskConfig, 4629 Configuration oldTaskOverride, int taskChanges) { 4630 if (taskChanges == 0) { 4631 // {@link Configuration#diff} doesn't catch changes from unset values. 4632 // Check for changes we care about. 4633 if (oldTaskOverride.orientation != taskConfig.orientation) { 4634 taskChanges |= CONFIG_ORIENTATION; 4635 } 4636 // We want to explicitly track situations where the size configuration goes from 4637 // undefined to defined. We don't care about crossing the threshold in that case, 4638 // because there is no threshold. 4639 final int oldHeight = oldTaskOverride.screenHeightDp; 4640 final int newHeight = taskConfig.screenHeightDp; 4641 final int undefinedHeight = Configuration.SCREEN_HEIGHT_DP_UNDEFINED; 4642 if ((oldHeight == undefinedHeight && newHeight != undefinedHeight) 4643 || (oldHeight != undefinedHeight && newHeight == undefinedHeight)) { 4644 taskChanges |= CONFIG_SCREEN_SIZE; 4645 } 4646 final int oldWidth = oldTaskOverride.screenWidthDp; 4647 final int newWidth = taskConfig.screenWidthDp; 4648 final int undefinedWidth = Configuration.SCREEN_WIDTH_DP_UNDEFINED; 4649 if ((oldWidth == undefinedWidth && newWidth != undefinedWidth) 4650 || (oldWidth != undefinedWidth && newWidth == undefinedWidth)) { 4651 taskChanges |= CONFIG_SCREEN_SIZE; 4652 } 4653 final int oldSmallest = oldTaskOverride.smallestScreenWidthDp; 4654 final int newSmallest = taskConfig.smallestScreenWidthDp; 4655 final int undefinedSmallest = Configuration.SMALLEST_SCREEN_WIDTH_DP_UNDEFINED; 4656 if ((oldSmallest == undefinedSmallest && newSmallest != undefinedSmallest) 4657 || (oldSmallest != undefinedSmallest && newSmallest == undefinedSmallest)) { 4658 taskChanges |= CONFIG_SMALLEST_SCREEN_SIZE; 4659 } 4660 final int oldLayout = oldTaskOverride.screenLayout; 4661 final int newLayout = taskConfig.screenLayout; 4662 if ((oldLayout == SCREENLAYOUT_UNDEFINED && newLayout != SCREENLAYOUT_UNDEFINED) 4663 || (oldLayout != SCREENLAYOUT_UNDEFINED && newLayout == SCREENLAYOUT_UNDEFINED)) { 4664 taskChanges |= CONFIG_SCREEN_LAYOUT; 4665 } 4666 } 4667 return taskChanges; 4668 } 4669 4670 private static boolean isResizeOnlyChange(int change) { 4671 return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION 4672 | CONFIG_SCREEN_LAYOUT)) == 0; 4673 } 4674 4675 private void relaunchActivityLocked( 4676 ActivityRecord r, int changes, boolean andResume, boolean preserveWindow) { 4677 if (mService.mSuppressResizeConfigChanges && preserveWindow) { 4678 r.configChangeFlags = 0; 4679 return; 4680 } 4681 4682 List<ResultInfo> results = null; 4683 List<ReferrerIntent> newIntents = null; 4684 if (andResume) { 4685 results = r.results; 4686 newIntents = r.newIntents; 4687 } 4688 if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, 4689 "Relaunching: " + r + " with results=" + results + " newIntents=" + newIntents 4690 + " andResume=" + andResume + " preserveWindow=" + preserveWindow); 4691 EventLog.writeEvent(andResume ? EventLogTags.AM_RELAUNCH_RESUME_ACTIVITY 4692 : EventLogTags.AM_RELAUNCH_ACTIVITY, r.userId, System.identityHashCode(r), 4693 r.task.taskId, r.shortComponentName); 4694 4695 r.startFreezingScreenLocked(r.app, 0); 4696 4697 mStackSupervisor.removeChildActivityContainers(r); 4698 4699 try { 4700 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, 4701 "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + r 4702 + " callers=" + Debug.getCallers(6)); 4703 r.forceNewConfig = false; 4704 mStackSupervisor.activityRelaunchingLocked(r); 4705 r.app.thread.scheduleRelaunchActivity(r.appToken, results, newIntents, changes, 4706 !andResume, new Configuration(mService.mConfiguration), 4707 new Configuration(r.task.mOverrideConfig), preserveWindow); 4708 // Note: don't need to call pauseIfSleepingLocked() here, because 4709 // the caller will only pass in 'andResume' if this activity is 4710 // currently resumed, which implies we aren't sleeping. 4711 } catch (RemoteException e) { 4712 if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e); 4713 } 4714 4715 if (andResume) { 4716 if (DEBUG_STATES) { 4717 Slog.d(TAG_STATES, "Resumed after relaunch " + r); 4718 } 4719 r.state = ActivityState.RESUMED; 4720 // Relaunch-resume could happen either when the app is already in the front, 4721 // or while it's being brought to front. In the latter case, it's marked RESUMED 4722 // but not yet visible (or stopped). We need to complete the resume here as the 4723 // code in resumeTopActivityInnerLocked to complete the resume might be skipped. 4724 if (!r.visible || r.stopped) { 4725 mWindowManager.setAppVisibility(r.appToken, true); 4726 completeResumeLocked(r); 4727 } else { 4728 r.results = null; 4729 r.newIntents = null; 4730 } 4731 } else { 4732 mHandler.removeMessages(PAUSE_TIMEOUT_MSG, r); 4733 r.state = ActivityState.PAUSED; 4734 } 4735 4736 r.configChangeFlags = 0; 4737 r.deferRelaunchUntilPaused = false; 4738 r.preserveWindowOnDeferredRelaunch = false; 4739 } 4740 4741 boolean willActivityBeVisibleLocked(IBinder token) { 4742 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4743 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4744 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4745 final ActivityRecord r = activities.get(activityNdx); 4746 if (r.appToken == token) { 4747 return true; 4748 } 4749 if (r.fullscreen && !r.finishing) { 4750 return false; 4751 } 4752 } 4753 } 4754 final ActivityRecord r = ActivityRecord.forTokenLocked(token); 4755 if (r == null) { 4756 return false; 4757 } 4758 if (r.finishing) Slog.e(TAG, "willActivityBeVisibleLocked: Returning false," 4759 + " would have returned true for r=" + r); 4760 return !r.finishing; 4761 } 4762 4763 void closeSystemDialogsLocked() { 4764 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4765 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4766 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4767 final ActivityRecord r = activities.get(activityNdx); 4768 if ((r.info.flags&ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS) != 0) { 4769 finishActivityLocked(r, Activity.RESULT_CANCELED, null, "close-sys", true); 4770 } 4771 } 4772 } 4773 } 4774 4775 boolean finishDisabledPackageActivitiesLocked(String packageName, Set<String> filterByClasses, 4776 boolean doit, boolean evenPersistent, int userId) { 4777 boolean didSomething = false; 4778 TaskRecord lastTask = null; 4779 ComponentName homeActivity = null; 4780 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4781 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4782 int numActivities = activities.size(); 4783 for (int activityNdx = 0; activityNdx < numActivities; ++activityNdx) { 4784 ActivityRecord r = activities.get(activityNdx); 4785 final boolean sameComponent = 4786 (r.packageName.equals(packageName) && (filterByClasses == null 4787 || filterByClasses.contains(r.realActivity.getClassName()))) 4788 || (packageName == null && r.userId == userId); 4789 if ((userId == UserHandle.USER_ALL || r.userId == userId) 4790 && (sameComponent || r.task == lastTask) 4791 && (r.app == null || evenPersistent || !r.app.persistent)) { 4792 if (!doit) { 4793 if (r.finishing) { 4794 // If this activity is just finishing, then it is not 4795 // interesting as far as something to stop. 4796 continue; 4797 } 4798 return true; 4799 } 4800 if (r.isHomeActivity()) { 4801 if (homeActivity != null && homeActivity.equals(r.realActivity)) { 4802 Slog.i(TAG, "Skip force-stop again " + r); 4803 continue; 4804 } else { 4805 homeActivity = r.realActivity; 4806 } 4807 } 4808 didSomething = true; 4809 Slog.i(TAG, " Force finishing activity " + r); 4810 if (sameComponent) { 4811 if (r.app != null) { 4812 r.app.removed = true; 4813 } 4814 r.app = null; 4815 } 4816 lastTask = r.task; 4817 if (finishActivityLocked(r, Activity.RESULT_CANCELED, null, "force-stop", 4818 true)) { 4819 // r has been deleted from mActivities, accommodate. 4820 --numActivities; 4821 --activityNdx; 4822 } 4823 } 4824 } 4825 } 4826 return didSomething; 4827 } 4828 4829 void getTasksLocked(List<RunningTaskInfo> list, int callingUid, boolean allowed) { 4830 boolean focusedStack = mStackSupervisor.getFocusedStack() == this; 4831 boolean topTask = true; 4832 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4833 final TaskRecord task = mTaskHistory.get(taskNdx); 4834 if (task.getTopActivity() == null) { 4835 continue; 4836 } 4837 ActivityRecord r = null; 4838 ActivityRecord top = null; 4839 ActivityRecord tmp; 4840 int numActivities = 0; 4841 int numRunning = 0; 4842 final ArrayList<ActivityRecord> activities = task.mActivities; 4843 if (!allowed && !task.isHomeTask() && task.effectiveUid != callingUid) { 4844 continue; 4845 } 4846 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4847 tmp = activities.get(activityNdx); 4848 if (tmp.finishing) { 4849 continue; 4850 } 4851 r = tmp; 4852 4853 // Initialize state for next task if needed. 4854 if (top == null || (top.state == ActivityState.INITIALIZING)) { 4855 top = r; 4856 numActivities = numRunning = 0; 4857 } 4858 4859 // Add 'r' into the current task. 4860 numActivities++; 4861 if (r.app != null && r.app.thread != null) { 4862 numRunning++; 4863 } 4864 4865 if (DEBUG_ALL) Slog.v( 4866 TAG, r.intent.getComponent().flattenToShortString() 4867 + ": task=" + r.task); 4868 } 4869 4870 RunningTaskInfo ci = new RunningTaskInfo(); 4871 ci.id = task.taskId; 4872 ci.stackId = mStackId; 4873 ci.baseActivity = r.intent.getComponent(); 4874 ci.topActivity = top.intent.getComponent(); 4875 ci.lastActiveTime = task.lastActiveTime; 4876 if (focusedStack && topTask) { 4877 // Give the latest time to ensure foreground task can be sorted 4878 // at the first, because lastActiveTime of creating task is 0. 4879 ci.lastActiveTime = System.currentTimeMillis(); 4880 topTask = false; 4881 } 4882 4883 if (top.task != null) { 4884 ci.description = top.task.lastDescription; 4885 } 4886 ci.numActivities = numActivities; 4887 ci.numRunning = numRunning; 4888 ci.isDockable = task.canGoInDockedStack(); 4889 ci.resizeMode = task.mResizeMode; 4890 list.add(ci); 4891 } 4892 } 4893 4894 public void unhandledBackLocked() { 4895 final int top = mTaskHistory.size() - 1; 4896 if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Performing unhandledBack(): top activity at " + top); 4897 if (top >= 0) { 4898 final ArrayList<ActivityRecord> activities = mTaskHistory.get(top).mActivities; 4899 int activityTop = activities.size() - 1; 4900 if (activityTop > 0) { 4901 finishActivityLocked(activities.get(activityTop), Activity.RESULT_CANCELED, null, 4902 "unhandled-back", true); 4903 } 4904 } 4905 } 4906 4907 /** 4908 * Reset local parameters because an app's activity died. 4909 * @param app The app of the activity that died. 4910 * @return result from removeHistoryRecordsForAppLocked. 4911 */ 4912 boolean handleAppDiedLocked(ProcessRecord app) { 4913 if (mPausingActivity != null && mPausingActivity.app == app) { 4914 if (DEBUG_PAUSE || DEBUG_CLEANUP) Slog.v(TAG_PAUSE, 4915 "App died while pausing: " + mPausingActivity); 4916 mPausingActivity = null; 4917 } 4918 if (mLastPausedActivity != null && mLastPausedActivity.app == app) { 4919 mLastPausedActivity = null; 4920 mLastNoHistoryActivity = null; 4921 } 4922 4923 return removeHistoryRecordsForAppLocked(app); 4924 } 4925 4926 void handleAppCrashLocked(ProcessRecord app) { 4927 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4928 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 4929 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 4930 final ActivityRecord r = activities.get(activityNdx); 4931 if (r.app == app) { 4932 Slog.w(TAG, " Force finishing activity " 4933 + r.intent.getComponent().flattenToShortString()); 4934 // Force the destroy to skip right to removal. 4935 r.app = null; 4936 finishCurrentActivityLocked(r, FINISH_IMMEDIATELY, false); 4937 } 4938 } 4939 } 4940 } 4941 4942 boolean dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, boolean dumpAll, 4943 boolean dumpClient, String dumpPackage, boolean needSep, String header) { 4944 boolean printed = false; 4945 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4946 final TaskRecord task = mTaskHistory.get(taskNdx); 4947 printed |= ActivityStackSupervisor.dumpHistoryList(fd, pw, 4948 mTaskHistory.get(taskNdx).mActivities, " ", "Hist", true, !dumpAll, 4949 dumpClient, dumpPackage, needSep, header, 4950 " Task id #" + task.taskId + "\n" + 4951 " mFullscreen=" + task.mFullscreen + "\n" + 4952 " mBounds=" + task.mBounds + "\n" + 4953 " mMinWidth=" + task.mMinWidth + "\n" + 4954 " mMinHeight=" + task.mMinHeight + "\n" + 4955 " mLastNonFullscreenBounds=" + task.mLastNonFullscreenBounds); 4956 if (printed) { 4957 header = null; 4958 } 4959 } 4960 return printed; 4961 } 4962 4963 ArrayList<ActivityRecord> getDumpActivitiesLocked(String name) { 4964 ArrayList<ActivityRecord> activities = new ArrayList<ActivityRecord>(); 4965 4966 if ("all".equals(name)) { 4967 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4968 activities.addAll(mTaskHistory.get(taskNdx).mActivities); 4969 } 4970 } else if ("top".equals(name)) { 4971 final int top = mTaskHistory.size() - 1; 4972 if (top >= 0) { 4973 final ArrayList<ActivityRecord> list = mTaskHistory.get(top).mActivities; 4974 int listTop = list.size() - 1; 4975 if (listTop >= 0) { 4976 activities.add(list.get(listTop)); 4977 } 4978 } 4979 } else { 4980 ItemMatcher matcher = new ItemMatcher(); 4981 matcher.build(name); 4982 4983 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 4984 for (ActivityRecord r1 : mTaskHistory.get(taskNdx).mActivities) { 4985 if (matcher.match(r1, r1.intent.getComponent())) { 4986 activities.add(r1); 4987 } 4988 } 4989 } 4990 } 4991 4992 return activities; 4993 } 4994 4995 ActivityRecord restartPackage(String packageName) { 4996 ActivityRecord starting = topRunningActivityLocked(); 4997 4998 // All activities that came from the package must be 4999 // restarted as if there was a config change. 5000 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 5001 final ArrayList<ActivityRecord> activities = mTaskHistory.get(taskNdx).mActivities; 5002 for (int activityNdx = activities.size() - 1; activityNdx >= 0; --activityNdx) { 5003 final ActivityRecord a = activities.get(activityNdx); 5004 if (a.info.packageName.equals(packageName)) { 5005 a.forceNewConfig = true; 5006 if (starting != null && a == starting && a.visible) { 5007 a.startFreezingScreenLocked(starting.app, 5008 CONFIG_SCREEN_LAYOUT); 5009 } 5010 } 5011 } 5012 } 5013 5014 return starting; 5015 } 5016 5017 void removeTask(TaskRecord task, String reason) { 5018 removeTask(task, reason, REMOVE_TASK_MODE_DESTROYING); 5019 } 5020 5021 /** 5022 * Removes the input task from this stack. 5023 * @param task to remove. 5024 * @param reason for removal. 5025 * @param mode task removal mode. Either {@link #REMOVE_TASK_MODE_DESTROYING}, 5026 * {@link #REMOVE_TASK_MODE_MOVING}, {@link #REMOVE_TASK_MODE_MOVING_TO_TOP}. 5027 */ 5028 void removeTask(TaskRecord task, String reason, int mode) { 5029 if (mode == REMOVE_TASK_MODE_DESTROYING) { 5030 mStackSupervisor.removeLockedTaskLocked(task); 5031 mWindowManager.removeTask(task.taskId); 5032 if (!StackId.persistTaskBounds(mStackId)) { 5033 // Reset current bounds for task whose bounds shouldn't be persisted so it uses 5034 // default configuration the next time it launches. 5035 task.updateOverrideConfiguration(null); 5036 } 5037 } 5038 5039 final ActivityRecord r = mResumedActivity; 5040 if (r != null && r.task == task) { 5041 mResumedActivity = null; 5042 } 5043 5044 final int taskNdx = mTaskHistory.indexOf(task); 5045 final int topTaskNdx = mTaskHistory.size() - 1; 5046 if (task.isOverHomeStack() && taskNdx < topTaskNdx) { 5047 final TaskRecord nextTask = mTaskHistory.get(taskNdx + 1); 5048 if (!nextTask.isOverHomeStack()) { 5049 nextTask.setTaskToReturnTo(HOME_ACTIVITY_TYPE); 5050 } 5051 } 5052 mTaskHistory.remove(task); 5053 updateTaskMovement(task, true); 5054 5055 if (mode == REMOVE_TASK_MODE_DESTROYING && task.mActivities.isEmpty()) { 5056 // TODO: VI what about activity? 5057 final boolean isVoiceSession = task.voiceSession != null; 5058 if (isVoiceSession) { 5059 try { 5060 task.voiceSession.taskFinished(task.intent, task.taskId); 5061 } catch (RemoteException e) { 5062 } 5063 } 5064 if (task.autoRemoveFromRecents() || isVoiceSession) { 5065 // Task creator asked to remove this when done, or this task was a voice 5066 // interaction, so it should not remain on the recent tasks list. 5067 mRecentTasks.remove(task); 5068 task.removedFromRecents(); 5069 } 5070 } 5071 5072 if (mTaskHistory.isEmpty()) { 5073 if (DEBUG_STACK) Slog.i(TAG_STACK, "removeTask: removing stack=" + this); 5074 // We only need to adjust focused stack if this stack is in focus and we are not in the 5075 // process of moving the task to the top of the stack that will be focused. 5076 if (isOnHomeDisplay() && mode != REMOVE_TASK_MODE_MOVING_TO_TOP 5077 && mStackSupervisor.isFocusedStack(this)) { 5078 String myReason = reason + " leftTaskHistoryEmpty"; 5079 if (mFullscreen 5080 || !adjustFocusToNextFocusableStackLocked( 5081 task.getTaskToReturnTo(), myReason)) { 5082 mStackSupervisor.moveHomeStackToFront(myReason); 5083 } 5084 } 5085 if (mStacks != null) { 5086 mStacks.remove(this); 5087 mStacks.add(0, this); 5088 } 5089 if (!isHomeStack()) { 5090 mActivityContainer.onTaskListEmptyLocked(); 5091 } 5092 } 5093 5094 task.stack = null; 5095 } 5096 5097 TaskRecord createTaskRecord(int taskId, ActivityInfo info, Intent intent, 5098 IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor, 5099 boolean toTop) { 5100 TaskRecord task = new TaskRecord(mService, taskId, info, intent, voiceSession, 5101 voiceInteractor); 5102 // add the task to stack first, mTaskPositioner might need the stack association 5103 addTask(task, toTop, "createTaskRecord"); 5104 final boolean isLockscreenShown = mService.mLockScreenShown == LOCK_SCREEN_SHOWN; 5105 if (!layoutTaskInStack(task, info.windowLayout) && mBounds != null && task.isResizeable() 5106 && !isLockscreenShown) { 5107 task.updateOverrideConfiguration(mBounds); 5108 } 5109 return task; 5110 } 5111 5112 boolean layoutTaskInStack(TaskRecord task, ActivityInfo.WindowLayout windowLayout) { 5113 if (mTaskPositioner == null) { 5114 return false; 5115 } 5116 mTaskPositioner.updateDefaultBounds(task, mTaskHistory, windowLayout); 5117 return true; 5118 } 5119 5120 ArrayList<TaskRecord> getAllTasks() { 5121 return new ArrayList<>(mTaskHistory); 5122 } 5123 5124 void addTask(final TaskRecord task, final boolean toTop, String reason) { 5125 final ActivityStack prevStack = preAddTask(task, reason, toTop); 5126 5127 task.stack = this; 5128 if (toTop) { 5129 insertTaskAtTop(task, null); 5130 } else { 5131 mTaskHistory.add(0, task); 5132 updateTaskMovement(task, false); 5133 } 5134 postAddTask(task, prevStack); 5135 } 5136 5137 void positionTask(final TaskRecord task, int position) { 5138 final ActivityRecord topRunningActivity = task.topRunningActivityLocked(); 5139 final boolean wasResumed = topRunningActivity == task.stack.mResumedActivity; 5140 final ActivityStack prevStack = preAddTask(task, "positionTask", !ON_TOP); 5141 task.stack = this; 5142 insertTaskAtPosition(task, position); 5143 postAddTask(task, prevStack); 5144 if (wasResumed) { 5145 if (mResumedActivity != null) { 5146 Log.wtf(TAG, "mResumedActivity was already set when moving mResumedActivity from" 5147 + " other stack to this stack mResumedActivity=" + mResumedActivity 5148 + " other mResumedActivity=" + topRunningActivity); 5149 } 5150 mResumedActivity = topRunningActivity; 5151 } 5152 } 5153 5154 private ActivityStack preAddTask(TaskRecord task, String reason, boolean toTop) { 5155 final ActivityStack prevStack = task.stack; 5156 if (prevStack != null && prevStack != this) { 5157 prevStack.removeTask(task, reason, 5158 toTop ? REMOVE_TASK_MODE_MOVING_TO_TOP : REMOVE_TASK_MODE_MOVING); 5159 } 5160 return prevStack; 5161 } 5162 5163 private void postAddTask(TaskRecord task, ActivityStack prevStack) { 5164 if (prevStack != null) { 5165 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5166 } else if (task.voiceSession != null) { 5167 try { 5168 task.voiceSession.taskStarted(task.intent, task.taskId); 5169 } catch (RemoteException e) { 5170 } 5171 } 5172 } 5173 5174 void addConfigOverride(ActivityRecord r, TaskRecord task) { 5175 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5176 // TODO: VI deal with activity 5177 mWindowManager.addAppToken(task.mActivities.indexOf(r), r.appToken, 5178 r.task.taskId, mStackId, r.info.screenOrientation, r.fullscreen, 5179 (r.info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0, r.userId, r.info.configChanges, 5180 task.voiceSession != null, r.mLaunchTaskBehind, bounds, task.mOverrideConfig, 5181 task.mResizeMode, r.isAlwaysFocusable(), task.isHomeTask()); 5182 r.taskConfigOverride = task.mOverrideConfig; 5183 } 5184 5185 void moveToFrontAndResumeStateIfNeeded( 5186 ActivityRecord r, boolean moveToFront, boolean setResume, String reason) { 5187 if (!moveToFront) { 5188 return; 5189 } 5190 5191 // If the activity owns the last resumed activity, transfer that together, 5192 // so that we don't resume the same activity again in the new stack. 5193 // Apps may depend on onResume()/onPause() being called in pairs. 5194 if (setResume) { 5195 mResumedActivity = r; 5196 } 5197 // Move the stack in which we are placing the activity to the front. The call will also 5198 // make sure the activity focus is set. 5199 moveToFront(reason); 5200 } 5201 5202 /** 5203 * Moves the input activity from its current stack to this one. 5204 * NOTE: The current task of the activity isn't moved to this stack. Instead a new task is 5205 * created on this stack which the activity is added to. 5206 * */ 5207 void moveActivityToStack(ActivityRecord r) { 5208 final ActivityStack prevStack = r.task.stack; 5209 if (prevStack.mStackId == mStackId) { 5210 // You are already in the right stack silly... 5211 return; 5212 } 5213 5214 final boolean wasFocused = mStackSupervisor.isFocusedStack(prevStack) 5215 && (mStackSupervisor.topRunningActivityLocked() == r); 5216 final boolean wasResumed = wasFocused && (prevStack.mResumedActivity == r); 5217 5218 final TaskRecord task = createTaskRecord( 5219 mStackSupervisor.getNextTaskIdForUserLocked(r.userId), 5220 r.info, r.intent, null, null, true); 5221 r.setTask(task, null); 5222 task.addActivityToTop(r); 5223 setAppTask(r, task); 5224 mStackSupervisor.scheduleReportPictureInPictureModeChangedIfNeeded(task, prevStack); 5225 moveToFrontAndResumeStateIfNeeded(r, wasFocused, wasResumed, "moveActivityToStack"); 5226 if (wasResumed) { 5227 prevStack.mResumedActivity = null; 5228 } 5229 } 5230 5231 private void setAppTask(ActivityRecord r, TaskRecord task) { 5232 final Rect bounds = task.updateOverrideConfigurationFromLaunchBounds(); 5233 mWindowManager.setAppTask(r.appToken, task.taskId, mStackId, bounds, task.mOverrideConfig, 5234 task.mResizeMode, task.isHomeTask()); 5235 r.taskConfigOverride = task.mOverrideConfig; 5236 } 5237 5238 public int getStackId() { 5239 return mStackId; 5240 } 5241 5242 @Override 5243 public String toString() { 5244 return "ActivityStack{" + Integer.toHexString(System.identityHashCode(this)) 5245 + " stackId=" + mStackId + ", " + mTaskHistory.size() + " tasks}"; 5246 } 5247 5248 void onLockTaskPackagesUpdatedLocked() { 5249 for (int taskNdx = mTaskHistory.size() - 1; taskNdx >= 0; --taskNdx) { 5250 mTaskHistory.get(taskNdx).setLockTaskAuth(); 5251 } 5252 } 5253} 5254