ActivityManager.java revision 9b21265b2ce0f57796bffb241c008fff459d4b05
1/* 2 * Copyright (C) 2007 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 android.app; 18 19import android.Manifest; 20import android.annotation.IntDef; 21import android.annotation.NonNull; 22import android.annotation.Nullable; 23import android.annotation.RequiresPermission; 24import android.annotation.SystemApi; 25import android.content.pm.ActivityInfo; 26import android.content.res.Configuration; 27import android.graphics.Canvas; 28import android.graphics.Matrix; 29import android.graphics.Point; 30import android.os.BatteryStats; 31import android.os.IBinder; 32import android.os.ParcelFileDescriptor; 33 34import com.android.internal.app.procstats.ProcessStats; 35import com.android.internal.os.TransferPipe; 36import com.android.internal.util.FastPrintWriter; 37 38import android.content.ComponentName; 39import android.content.Context; 40import android.content.Intent; 41import android.content.UriPermission; 42import android.content.pm.ApplicationInfo; 43import android.content.pm.ConfigurationInfo; 44import android.content.pm.IPackageDataObserver; 45import android.content.pm.PackageManager; 46import android.content.pm.ParceledListSlice; 47import android.content.pm.UserInfo; 48import android.content.res.Resources; 49import android.graphics.Bitmap; 50import android.graphics.Color; 51import android.graphics.Rect; 52import android.os.Bundle; 53import android.os.Debug; 54import android.os.Handler; 55import android.os.Parcel; 56import android.os.Parcelable; 57import android.os.Process; 58import android.os.RemoteException; 59import android.os.ServiceManager; 60import android.os.SystemProperties; 61import android.os.UserHandle; 62import android.text.TextUtils; 63import android.util.DisplayMetrics; 64import android.util.Size; 65 66import org.xmlpull.v1.XmlSerializer; 67 68import java.io.FileDescriptor; 69import java.io.FileOutputStream; 70import java.io.IOException; 71import java.io.PrintWriter; 72import java.lang.annotation.Retention; 73import java.lang.annotation.RetentionPolicy; 74import java.util.ArrayList; 75import java.util.List; 76 77/** 78 * <p> 79 * This class gives information about, and interacts 80 * with, activities, services, and the containing 81 * process. 82 * </p> 83 * 84 * <p> 85 * A number of the methods in this class are for 86 * debugging or informational purposes and they should 87 * not be used to affect any runtime behavior of 88 * your app. These methods are called out as such in 89 * the method level documentation. 90 * </p> 91 * 92 *<p> 93 * Most application developers should not have the need to 94 * use this class, most of whose methods are for specialized 95 * use cases. However, a few methods are more broadly applicable. 96 * For instance, {@link android.app.ActivityManager#isLowRamDevice() isLowRamDevice()} 97 * enables your app to detect whether it is running on a low-memory device, 98 * and behave accordingly. 99 * {@link android.app.ActivityManager#clearApplicationUserData() clearApplicationUserData()} 100 * is for apps with reset-data functionality. 101 * </p> 102 * 103 * <p> 104 * In some special use cases, where an app interacts with 105 * its Task stack, the app may use the 106 * {@link android.app.ActivityManager.AppTask} and 107 * {@link android.app.ActivityManager.RecentTaskInfo} inner 108 * classes. However, in general, the methods in this class should 109 * be used for testing and debugging purposes only. 110 * </p> 111 */ 112public class ActivityManager { 113 private static String TAG = "ActivityManager"; 114 115 private static int gMaxRecentTasks = -1; 116 117 private final Context mContext; 118 private final Handler mHandler; 119 120 /** 121 * Defines acceptable types of bugreports. 122 * @hide 123 */ 124 @Retention(RetentionPolicy.SOURCE) 125 @IntDef({ 126 BUGREPORT_OPTION_FULL, 127 BUGREPORT_OPTION_INTERACTIVE, 128 BUGREPORT_OPTION_REMOTE, 129 BUGREPORT_OPTION_WEAR, 130 BUGREPORT_OPTION_TELEPHONY 131 }) 132 public @interface BugreportMode {} 133 /** 134 * Takes a bugreport without user interference (and hence causing less 135 * interference to the system), but includes all sections. 136 * @hide 137 */ 138 public static final int BUGREPORT_OPTION_FULL = 0; 139 /** 140 * Allows user to monitor progress and enter additional data; might not include all 141 * sections. 142 * @hide 143 */ 144 public static final int BUGREPORT_OPTION_INTERACTIVE = 1; 145 /** 146 * Takes a bugreport requested remotely by administrator of the Device Owner app, 147 * not the device's user. 148 * @hide 149 */ 150 public static final int BUGREPORT_OPTION_REMOTE = 2; 151 /** 152 * Takes a bugreport on a wearable device. 153 * @hide 154 */ 155 public static final int BUGREPORT_OPTION_WEAR = 3; 156 157 /** 158 * Takes a lightweight version of bugreport that only includes a few, urgent sections 159 * used to report telephony bugs. 160 * @hide 161 */ 162 public static final int BUGREPORT_OPTION_TELEPHONY = 4; 163 164 /** 165 * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code 166 * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be 167 * uninstalled in lieu of the declaring one. The package named here must be 168 * signed with the same certificate as the one declaring the {@code <meta-data>}. 169 */ 170 public static final String META_HOME_ALTERNATE = "android.app.home.alternate"; 171 172 /** 173 * Result for IActivityManager.startVoiceActivity: active session is currently hidden. 174 * @hide 175 */ 176 public static final int START_VOICE_HIDDEN_SESSION = -10; 177 178 /** 179 * Result for IActivityManager.startVoiceActivity: active session does not match 180 * the requesting token. 181 * @hide 182 */ 183 public static final int START_VOICE_NOT_ACTIVE_SESSION = -9; 184 185 /** 186 * Result for IActivityManager.startActivity: trying to start a background user 187 * activity that shouldn't be displayed for all users. 188 * @hide 189 */ 190 public static final int START_NOT_CURRENT_USER_ACTIVITY = -8; 191 192 /** 193 * Result for IActivityManager.startActivity: trying to start an activity under voice 194 * control when that activity does not support the VOICE category. 195 * @hide 196 */ 197 public static final int START_NOT_VOICE_COMPATIBLE = -7; 198 199 /** 200 * Result for IActivityManager.startActivity: an error where the 201 * start had to be canceled. 202 * @hide 203 */ 204 public static final int START_CANCELED = -6; 205 206 /** 207 * Result for IActivityManager.startActivity: an error where the 208 * thing being started is not an activity. 209 * @hide 210 */ 211 public static final int START_NOT_ACTIVITY = -5; 212 213 /** 214 * Result for IActivityManager.startActivity: an error where the 215 * caller does not have permission to start the activity. 216 * @hide 217 */ 218 public static final int START_PERMISSION_DENIED = -4; 219 220 /** 221 * Result for IActivityManager.startActivity: an error where the 222 * caller has requested both to forward a result and to receive 223 * a result. 224 * @hide 225 */ 226 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 227 228 /** 229 * Result for IActivityManager.startActivity: an error where the 230 * requested class is not found. 231 * @hide 232 */ 233 public static final int START_CLASS_NOT_FOUND = -2; 234 235 /** 236 * Result for IActivityManager.startActivity: an error where the 237 * given Intent could not be resolved to an activity. 238 * @hide 239 */ 240 public static final int START_INTENT_NOT_RESOLVED = -1; 241 242 /** 243 * Result for IActivityManaqer.startActivity: the activity was started 244 * successfully as normal. 245 * @hide 246 */ 247 public static final int START_SUCCESS = 0; 248 249 /** 250 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 251 * be executed if it is the recipient, and that is indeed the case. 252 * @hide 253 */ 254 public static final int START_RETURN_INTENT_TO_CALLER = 1; 255 256 /** 257 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 258 * a task was simply brought to the foreground. 259 * @hide 260 */ 261 public static final int START_TASK_TO_FRONT = 2; 262 263 /** 264 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 265 * the given Intent was given to the existing top activity. 266 * @hide 267 */ 268 public static final int START_DELIVERED_TO_TOP = 3; 269 270 /** 271 * Result for IActivityManaqer.startActivity: request was canceled because 272 * app switches are temporarily canceled to ensure the user's last request 273 * (such as pressing home) is performed. 274 * @hide 275 */ 276 public static final int START_SWITCHES_CANCELED = 4; 277 278 /** 279 * Result for IActivityManaqer.startActivity: a new activity was attempted to be started 280 * while in Lock Task Mode. 281 * @hide 282 */ 283 public static final int START_RETURN_LOCK_TASK_MODE_VIOLATION = 5; 284 285 /** 286 * Flag for IActivityManaqer.startActivity: do special start mode where 287 * a new activity is launched only if it is needed. 288 * @hide 289 */ 290 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 291 292 /** 293 * Flag for IActivityManaqer.startActivity: launch the app for 294 * debugging. 295 * @hide 296 */ 297 public static final int START_FLAG_DEBUG = 1<<1; 298 299 /** 300 * Flag for IActivityManaqer.startActivity: launch the app for 301 * allocation tracking. 302 * @hide 303 */ 304 public static final int START_FLAG_TRACK_ALLOCATION = 1<<2; 305 306 /** 307 * Flag for IActivityManaqer.startActivity: launch the app with 308 * native debugging support. 309 * @hide 310 */ 311 public static final int START_FLAG_NATIVE_DEBUGGING = 1<<3; 312 313 /** 314 * Result for IActivityManaqer.broadcastIntent: success! 315 * @hide 316 */ 317 public static final int BROADCAST_SUCCESS = 0; 318 319 /** 320 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 321 * a sticky intent without appropriate permission. 322 * @hide 323 */ 324 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 325 326 /** 327 * Result for IActivityManager.broadcastIntent: trying to send a broadcast 328 * to a stopped user. Fail. 329 * @hide 330 */ 331 public static final int BROADCAST_FAILED_USER_STOPPED = -2; 332 333 /** 334 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 335 * for a sendBroadcast operation. 336 * @hide 337 */ 338 public static final int INTENT_SENDER_BROADCAST = 1; 339 340 /** 341 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 342 * for a startActivity operation. 343 * @hide 344 */ 345 public static final int INTENT_SENDER_ACTIVITY = 2; 346 347 /** 348 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 349 * for an activity result operation. 350 * @hide 351 */ 352 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 353 354 /** 355 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 356 * for a startService operation. 357 * @hide 358 */ 359 public static final int INTENT_SENDER_SERVICE = 4; 360 361 /** @hide User operation call: success! */ 362 public static final int USER_OP_SUCCESS = 0; 363 364 /** @hide User operation call: given user id is not known. */ 365 public static final int USER_OP_UNKNOWN_USER = -1; 366 367 /** @hide User operation call: given user id is the current user, can't be stopped. */ 368 public static final int USER_OP_IS_CURRENT = -2; 369 370 /** @hide User operation call: system user can't be stopped. */ 371 public static final int USER_OP_ERROR_IS_SYSTEM = -3; 372 373 /** @hide User operation call: one of related users cannot be stopped. */ 374 public static final int USER_OP_ERROR_RELATED_USERS_CANNOT_STOP = -4; 375 376 /** @hide Process does not exist. */ 377 public static final int PROCESS_STATE_NONEXISTENT = -1; 378 379 /** @hide Process is a persistent system process. */ 380 public static final int PROCESS_STATE_PERSISTENT = 0; 381 382 /** @hide Process is a persistent system process and is doing UI. */ 383 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 384 385 /** @hide Process is hosting the current top activities. Note that this covers 386 * all activities that are visible to the user. */ 387 public static final int PROCESS_STATE_TOP = 2; 388 389 /** @hide Process is hosting a foreground service due to a system binding. */ 390 public static final int PROCESS_STATE_BOUND_FOREGROUND_SERVICE = 3; 391 392 /** @hide Process is hosting a foreground service. */ 393 public static final int PROCESS_STATE_FOREGROUND_SERVICE = 4; 394 395 /** @hide Same as {@link #PROCESS_STATE_TOP} but while device is sleeping. */ 396 public static final int PROCESS_STATE_TOP_SLEEPING = 5; 397 398 /** @hide Process is important to the user, and something they are aware of. */ 399 public static final int PROCESS_STATE_IMPORTANT_FOREGROUND = 6; 400 401 /** @hide Process is important to the user, but not something they are aware of. */ 402 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 7; 403 404 /** @hide Process is in the background running a backup/restore operation. */ 405 public static final int PROCESS_STATE_BACKUP = 8; 406 407 /** @hide Process is in the background, but it can't restore its state so we want 408 * to try to avoid killing it. */ 409 public static final int PROCESS_STATE_HEAVY_WEIGHT = 9; 410 411 /** @hide Process is in the background running a service. Unlike oom_adj, this level 412 * is used for both the normal running in background state and the executing 413 * operations state. */ 414 public static final int PROCESS_STATE_SERVICE = 10; 415 416 /** @hide Process is in the background running a receiver. Note that from the 417 * perspective of oom_adj receivers run at a higher foreground level, but for our 418 * prioritization here that is not necessary and putting them below services means 419 * many fewer changes in some process states as they receive broadcasts. */ 420 public static final int PROCESS_STATE_RECEIVER = 11; 421 422 /** @hide Process is in the background but hosts the home activity. */ 423 public static final int PROCESS_STATE_HOME = 12; 424 425 /** @hide Process is in the background but hosts the last shown activity. */ 426 public static final int PROCESS_STATE_LAST_ACTIVITY = 13; 427 428 /** @hide Process is being cached for later use and contains activities. */ 429 public static final int PROCESS_STATE_CACHED_ACTIVITY = 14; 430 431 /** @hide Process is being cached for later use and is a client of another cached 432 * process that contains activities. */ 433 public static final int PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 15; 434 435 /** @hide Process is being cached for later use and is empty. */ 436 public static final int PROCESS_STATE_CACHED_EMPTY = 16; 437 438 /** @hide The lowest process state number */ 439 public static final int MIN_PROCESS_STATE = PROCESS_STATE_NONEXISTENT; 440 441 /** @hide The highest process state number */ 442 public static final int MAX_PROCESS_STATE = PROCESS_STATE_CACHED_EMPTY; 443 444 /** @hide Should this process state be considered a background state? */ 445 public static final boolean isProcStateBackground(int procState) { 446 return procState >= PROCESS_STATE_BACKUP; 447 } 448 449 /** @hide requestType for assist context: only basic information. */ 450 public static final int ASSIST_CONTEXT_BASIC = 0; 451 452 /** @hide requestType for assist context: generate full AssistStructure. */ 453 public static final int ASSIST_CONTEXT_FULL = 1; 454 455 /** @hide Flag for registerUidObserver: report changes in process state. */ 456 public static final int UID_OBSERVER_PROCSTATE = 1<<0; 457 458 /** @hide Flag for registerUidObserver: report uid gone. */ 459 public static final int UID_OBSERVER_GONE = 1<<1; 460 461 /** @hide Flag for registerUidObserver: report uid has become idle. */ 462 public static final int UID_OBSERVER_IDLE = 1<<2; 463 464 /** @hide Flag for registerUidObserver: report uid has become active. */ 465 public static final int UID_OBSERVER_ACTIVE = 1<<3; 466 467 /** @hide Mode for {@link IActivityManager#getAppStartMode}: normal free-to-run operation. */ 468 public static final int APP_START_MODE_NORMAL = 0; 469 470 /** @hide Mode for {@link IActivityManager#getAppStartMode}: delay running until later. */ 471 public static final int APP_START_MODE_DELAYED = 1; 472 473 /** @hide Mode for {@link IActivityManager#getAppStartMode}: disable/cancel pending 474 * launches. */ 475 public static final int APP_START_MODE_DISABLED = 2; 476 477 /** 478 * Lock task mode is not active. 479 */ 480 public static final int LOCK_TASK_MODE_NONE = 0; 481 482 /** 483 * Full lock task mode is active. 484 */ 485 public static final int LOCK_TASK_MODE_LOCKED = 1; 486 487 /** 488 * App pinning mode is active. 489 */ 490 public static final int LOCK_TASK_MODE_PINNED = 2; 491 492 Point mAppTaskThumbnailSize; 493 494 /*package*/ ActivityManager(Context context, Handler handler) { 495 mContext = context; 496 mHandler = handler; 497 } 498 499 /** 500 * Screen compatibility mode: the application most always run in 501 * compatibility mode. 502 * @hide 503 */ 504 public static final int COMPAT_MODE_ALWAYS = -1; 505 506 /** 507 * Screen compatibility mode: the application can never run in 508 * compatibility mode. 509 * @hide 510 */ 511 public static final int COMPAT_MODE_NEVER = -2; 512 513 /** 514 * Screen compatibility mode: unknown. 515 * @hide 516 */ 517 public static final int COMPAT_MODE_UNKNOWN = -3; 518 519 /** 520 * Screen compatibility mode: the application currently has compatibility 521 * mode disabled. 522 * @hide 523 */ 524 public static final int COMPAT_MODE_DISABLED = 0; 525 526 /** 527 * Screen compatibility mode: the application currently has compatibility 528 * mode enabled. 529 * @hide 530 */ 531 public static final int COMPAT_MODE_ENABLED = 1; 532 533 /** 534 * Screen compatibility mode: request to toggle the application's 535 * compatibility mode. 536 * @hide 537 */ 538 public static final int COMPAT_MODE_TOGGLE = 2; 539 540 /** @hide */ 541 public static class StackId { 542 /** Invalid stack ID. */ 543 public static final int INVALID_STACK_ID = -1; 544 545 /** First static stack ID. */ 546 public static final int FIRST_STATIC_STACK_ID = 0; 547 548 /** Home activity stack ID. */ 549 public static final int HOME_STACK_ID = FIRST_STATIC_STACK_ID; 550 551 /** ID of stack where fullscreen activities are normally launched into. */ 552 public static final int FULLSCREEN_WORKSPACE_STACK_ID = 1; 553 554 /** ID of stack where freeform/resized activities are normally launched into. */ 555 public static final int FREEFORM_WORKSPACE_STACK_ID = FULLSCREEN_WORKSPACE_STACK_ID + 1; 556 557 /** ID of stack that occupies a dedicated region of the screen. */ 558 public static final int DOCKED_STACK_ID = FREEFORM_WORKSPACE_STACK_ID + 1; 559 560 /** ID of stack that always on top (always visible) when it exist. */ 561 public static final int PINNED_STACK_ID = DOCKED_STACK_ID + 1; 562 563 /** Last static stack stack ID. */ 564 public static final int LAST_STATIC_STACK_ID = PINNED_STACK_ID; 565 566 /** Start of ID range used by stacks that are created dynamically. */ 567 public static final int FIRST_DYNAMIC_STACK_ID = LAST_STATIC_STACK_ID + 1; 568 569 public static boolean isStaticStack(int stackId) { 570 return stackId >= FIRST_STATIC_STACK_ID && stackId <= LAST_STATIC_STACK_ID; 571 } 572 573 /** 574 * Returns true if the activities contained in the input stack display a shadow around 575 * their border. 576 */ 577 public static boolean hasWindowShadow(int stackId) { 578 return stackId == FREEFORM_WORKSPACE_STACK_ID || stackId == PINNED_STACK_ID; 579 } 580 581 /** 582 * Returns true if the activities contained in the input stack display a decor view. 583 */ 584 public static boolean hasWindowDecor(int stackId) { 585 return stackId == FREEFORM_WORKSPACE_STACK_ID; 586 } 587 588 /** 589 * Returns true if the tasks contained in the stack can be resized independently of the 590 * stack. 591 */ 592 public static boolean isTaskResizeAllowed(int stackId) { 593 return stackId == FREEFORM_WORKSPACE_STACK_ID; 594 } 595 596 /** Returns true if the task bounds should persist across power cycles. */ 597 public static boolean persistTaskBounds(int stackId) { 598 return stackId == FREEFORM_WORKSPACE_STACK_ID; 599 } 600 601 /** 602 * Returns true if dynamic stacks are allowed to be visible behind the input stack. 603 */ 604 public static boolean isDynamicStacksVisibleBehindAllowed(int stackId) { 605 return stackId == PINNED_STACK_ID; 606 } 607 608 /** 609 * Returns true if we try to maintain focus in the current stack when the top activity 610 * finishes. 611 */ 612 public static boolean keepFocusInStackIfPossible(int stackId) { 613 return stackId == FREEFORM_WORKSPACE_STACK_ID 614 || stackId == DOCKED_STACK_ID || stackId == PINNED_STACK_ID; 615 } 616 617 /** 618 * Returns true if Stack size is affected by the docked stack changing size. 619 */ 620 public static boolean isResizeableByDockedStack(int stackId) { 621 return isStaticStack(stackId) && 622 stackId != DOCKED_STACK_ID && stackId != PINNED_STACK_ID; 623 } 624 625 /** 626 * Returns true if the size of tasks in the input stack are affected by the docked stack 627 * changing size. 628 */ 629 public static boolean isTaskResizeableByDockedStack(int stackId) { 630 return isStaticStack(stackId) && stackId != FREEFORM_WORKSPACE_STACK_ID 631 && stackId != DOCKED_STACK_ID && stackId != PINNED_STACK_ID; 632 } 633 634 /** 635 * Returns true if the windows of tasks being moved to the target stack from the source 636 * stack should be replaced, meaning that window manager will keep the old window around 637 * until the new is ready. 638 */ 639 public static boolean replaceWindowsOnTaskMove(int sourceStackId, int targetStackId) { 640 return sourceStackId == FREEFORM_WORKSPACE_STACK_ID 641 || targetStackId == FREEFORM_WORKSPACE_STACK_ID; 642 } 643 644 /** 645 * Return whether a stackId is a stack containing floating windows. Floating windows 646 * are laid out differently as they are allowed to extend past the display bounds 647 * without overscan insets. 648 */ 649 public static boolean tasksAreFloating(int stackId) { 650 return stackId == FREEFORM_WORKSPACE_STACK_ID 651 || stackId == PINNED_STACK_ID; 652 } 653 654 /** 655 * Returns true if animation specs should be constructed for app transition that moves 656 * the task to the specified stack. 657 */ 658 public static boolean useAnimationSpecForAppTransition(int stackId) { 659 660 // TODO: INVALID_STACK_ID is also animated because we don't persist stack id's across 661 // reboots. 662 return stackId == FREEFORM_WORKSPACE_STACK_ID 663 || stackId == FULLSCREEN_WORKSPACE_STACK_ID || stackId == DOCKED_STACK_ID 664 || stackId == INVALID_STACK_ID; 665 } 666 667 /** Returns true if the windows in the stack can receive input keys. */ 668 public static boolean canReceiveKeys(int stackId) { 669 return stackId != PINNED_STACK_ID; 670 } 671 672 /** 673 * Returns true if the stack can be visible above lockscreen. 674 */ 675 public static boolean isAllowedOverLockscreen(int stackId) { 676 return stackId == HOME_STACK_ID || stackId == FULLSCREEN_WORKSPACE_STACK_ID; 677 } 678 679 public static boolean isAlwaysOnTop(int stackId) { 680 return stackId == PINNED_STACK_ID; 681 } 682 683 /** 684 * Returns true if the top task in the task is allowed to return home when finished and 685 * there are other tasks in the stack. 686 */ 687 public static boolean allowTopTaskToReturnHome(int stackId) { 688 return stackId != PINNED_STACK_ID; 689 } 690 691 /** 692 * Returns true if the stack should be resized to match the bounds specified by 693 * {@link ActivityOptions#setLaunchBounds} when launching an activity into the stack. 694 */ 695 public static boolean resizeStackWithLaunchBounds(int stackId) { 696 return stackId == PINNED_STACK_ID; 697 } 698 699 /** 700 * Returns true if any visible windows belonging to apps in this stack should be kept on 701 * screen when the app is killed due to something like the low memory killer. 702 */ 703 public static boolean keepVisibleDeadAppWindowOnScreen(int stackId) { 704 return stackId != PINNED_STACK_ID; 705 } 706 707 /** 708 * Returns true if the backdrop on the client side should match the frame of the window. 709 * Returns false, if the backdrop should be fullscreen. 710 */ 711 public static boolean useWindowFrameForBackdrop(int stackId) { 712 return stackId == FREEFORM_WORKSPACE_STACK_ID || stackId == PINNED_STACK_ID; 713 } 714 715 /** 716 * Returns true if a window from the specified stack with {@param stackId} are normally 717 * fullscreen, i. e. they can become the top opaque fullscreen window, meaning that it 718 * controls system bars, lockscreen occluded/dismissing state, screen rotation animation, 719 * etc. 720 */ 721 public static boolean normallyFullscreenWindows(int stackId) { 722 return stackId != PINNED_STACK_ID && stackId != FREEFORM_WORKSPACE_STACK_ID 723 && stackId != DOCKED_STACK_ID; 724 } 725 726 /** 727 * Returns true if the input stack id should only be present on a device that supports 728 * multi-window mode. 729 * @see android.app.ActivityManager#supportsMultiWindow 730 */ 731 public static boolean isMultiWindowStack(int stackId) { 732 return isStaticStack(stackId) || stackId == PINNED_STACK_ID 733 || stackId == FREEFORM_WORKSPACE_STACK_ID || stackId == DOCKED_STACK_ID; 734 } 735 736 /** 737 * Returns true if activities contained in this stack can request visible behind by 738 * calling {@link Activity#requestVisibleBehind}. 739 */ 740 public static boolean activitiesCanRequestVisibleBehind(int stackId) { 741 return stackId == FULLSCREEN_WORKSPACE_STACK_ID; 742 } 743 744 /** 745 * Returns true if this stack may be scaled without resizing, 746 * and windows within may need to be configured as such. 747 */ 748 public static boolean windowsAreScaleable(int stackId) { 749 return stackId == PINNED_STACK_ID; 750 } 751 752 /** 753 * Returns true if windows in this stack should be given move animations 754 * by default. 755 */ 756 public static boolean hasMovementAnimations(int stackId) { 757 return stackId != PINNED_STACK_ID; 758 } 759 } 760 761 /** 762 * Input parameter to {@link android.app.IActivityManager#moveTaskToDockedStack} which 763 * specifies the position of the created docked stack at the top half of the screen if 764 * in portrait mode or at the left half of the screen if in landscape mode. 765 * @hide 766 */ 767 public static final int DOCKED_STACK_CREATE_MODE_TOP_OR_LEFT = 0; 768 769 /** 770 * Input parameter to {@link android.app.IActivityManager#moveTaskToDockedStack} which 771 * specifies the position of the created docked stack at the bottom half of the screen if 772 * in portrait mode or at the right half of the screen if in landscape mode. 773 * @hide 774 */ 775 public static final int DOCKED_STACK_CREATE_MODE_BOTTOM_OR_RIGHT = 1; 776 777 /** 778 * Input parameter to {@link android.app.IActivityManager#resizeTask} which indicates 779 * that the resize doesn't need to preserve the window, and can be skipped if bounds 780 * is unchanged. This mode is used by window manager in most cases. 781 * @hide 782 */ 783 public static final int RESIZE_MODE_SYSTEM = 0; 784 785 /** 786 * Input parameter to {@link android.app.IActivityManager#resizeTask} which indicates 787 * that the resize should preserve the window if possible. 788 * @hide 789 */ 790 public static final int RESIZE_MODE_PRESERVE_WINDOW = (0x1 << 0); 791 792 /** 793 * Input parameter to {@link android.app.IActivityManager#resizeTask} which indicates 794 * that the resize should be performed even if the bounds appears unchanged. 795 * @hide 796 */ 797 public static final int RESIZE_MODE_FORCED = (0x1 << 1); 798 799 /** 800 * Input parameter to {@link android.app.IActivityManager#resizeTask} used by window 801 * manager during a screen rotation. 802 * @hide 803 */ 804 public static final int RESIZE_MODE_SYSTEM_SCREEN_ROTATION = RESIZE_MODE_PRESERVE_WINDOW; 805 806 /** 807 * Input parameter to {@link android.app.IActivityManager#resizeTask} used when the 808 * resize is due to a drag action. 809 * @hide 810 */ 811 public static final int RESIZE_MODE_USER = RESIZE_MODE_PRESERVE_WINDOW; 812 813 /** 814 * Input parameter to {@link android.app.IActivityManager#resizeTask} which indicates 815 * that the resize should preserve the window if possible, and should not be skipped 816 * even if the bounds is unchanged. Usually used to force a resizing when a drag action 817 * is ending. 818 * @hide 819 */ 820 public static final int RESIZE_MODE_USER_FORCED = 821 RESIZE_MODE_PRESERVE_WINDOW | RESIZE_MODE_FORCED; 822 823 /** @hide */ 824 public int getFrontActivityScreenCompatMode() { 825 try { 826 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 827 } catch (RemoteException e) { 828 throw e.rethrowFromSystemServer(); 829 } 830 } 831 832 /** @hide */ 833 public void setFrontActivityScreenCompatMode(int mode) { 834 try { 835 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 836 } catch (RemoteException e) { 837 throw e.rethrowFromSystemServer(); 838 } 839 } 840 841 /** @hide */ 842 public int getPackageScreenCompatMode(String packageName) { 843 try { 844 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 845 } catch (RemoteException e) { 846 throw e.rethrowFromSystemServer(); 847 } 848 } 849 850 /** @hide */ 851 public void setPackageScreenCompatMode(String packageName, int mode) { 852 try { 853 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 854 } catch (RemoteException e) { 855 throw e.rethrowFromSystemServer(); 856 } 857 } 858 859 /** @hide */ 860 public boolean getPackageAskScreenCompat(String packageName) { 861 try { 862 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 863 } catch (RemoteException e) { 864 throw e.rethrowFromSystemServer(); 865 } 866 } 867 868 /** @hide */ 869 public void setPackageAskScreenCompat(String packageName, boolean ask) { 870 try { 871 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 872 } catch (RemoteException e) { 873 throw e.rethrowFromSystemServer(); 874 } 875 } 876 877 /** 878 * Return the approximate per-application memory class of the current 879 * device. This gives you an idea of how hard a memory limit you should 880 * impose on your application to let the overall system work best. The 881 * returned value is in megabytes; the baseline Android memory class is 882 * 16 (which happens to be the Java heap limit of those devices); some 883 * device with more memory may return 24 or even higher numbers. 884 */ 885 public int getMemoryClass() { 886 return staticGetMemoryClass(); 887 } 888 889 /** @hide */ 890 static public int staticGetMemoryClass() { 891 // Really brain dead right now -- just take this from the configured 892 // vm heap size, and assume it is in megabytes and thus ends with "m". 893 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 894 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 895 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 896 } 897 return staticGetLargeMemoryClass(); 898 } 899 900 /** 901 * Return the approximate per-application memory class of the current 902 * device when an application is running with a large heap. This is the 903 * space available for memory-intensive applications; most applications 904 * should not need this amount of memory, and should instead stay with the 905 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 906 * This may be the same size as {@link #getMemoryClass()} on memory 907 * constrained devices, or it may be significantly larger on devices with 908 * a large amount of available RAM. 909 * 910 * <p>The is the size of the application's Dalvik heap if it has 911 * specified <code>android:largeHeap="true"</code> in its manifest. 912 */ 913 public int getLargeMemoryClass() { 914 return staticGetLargeMemoryClass(); 915 } 916 917 /** @hide */ 918 static public int staticGetLargeMemoryClass() { 919 // Really brain dead right now -- just take this from the configured 920 // vm heap size, and assume it is in megabytes and thus ends with "m". 921 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 922 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length() - 1)); 923 } 924 925 /** 926 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 927 * is ultimately up to the device configuration, but currently it generally means 928 * something in the class of a 512MB device with about a 800x480 or less screen. 929 * This is mostly intended to be used by apps to determine whether they should turn 930 * off certain features that require more RAM. 931 */ 932 public boolean isLowRamDevice() { 933 return isLowRamDeviceStatic(); 934 } 935 936 /** @hide */ 937 public static boolean isLowRamDeviceStatic() { 938 return "true".equals(SystemProperties.get("ro.config.low_ram", "false")); 939 } 940 941 /** 942 * Used by persistent processes to determine if they are running on a 943 * higher-end device so should be okay using hardware drawing acceleration 944 * (which tends to consume a lot more RAM). 945 * @hide 946 */ 947 static public boolean isHighEndGfx() { 948 return !isLowRamDeviceStatic() && 949 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 950 } 951 952 /** 953 * Return the maximum number of recents entries that we will maintain and show. 954 * @hide 955 */ 956 static public int getMaxRecentTasksStatic() { 957 if (gMaxRecentTasks < 0) { 958 return gMaxRecentTasks = isLowRamDeviceStatic() ? 36 : 48; 959 } 960 return gMaxRecentTasks; 961 } 962 963 /** 964 * Return the default limit on the number of recents that an app can make. 965 * @hide 966 */ 967 static public int getDefaultAppRecentsLimitStatic() { 968 return getMaxRecentTasksStatic() / 6; 969 } 970 971 /** 972 * Return the maximum limit on the number of recents that an app can make. 973 * @hide 974 */ 975 static public int getMaxAppRecentsLimitStatic() { 976 return getMaxRecentTasksStatic() / 2; 977 } 978 979 /** 980 * Returns true if the system supports at least one form of multi-window. 981 * E.g. freeform, split-screen, picture-in-picture. 982 * @hide 983 */ 984 static public boolean supportsMultiWindow() { 985 return !isLowRamDeviceStatic() 986 && Resources.getSystem().getBoolean( 987 com.android.internal.R.bool.config_supportsMultiWindow); 988 } 989 990 /** 991 * Information you can set and retrieve about the current activity within the recent task list. 992 */ 993 public static class TaskDescription implements Parcelable { 994 /** @hide */ 995 public static final String ATTR_TASKDESCRIPTION_PREFIX = "task_description_"; 996 private static final String ATTR_TASKDESCRIPTIONLABEL = 997 ATTR_TASKDESCRIPTION_PREFIX + "label"; 998 private static final String ATTR_TASKDESCRIPTIONCOLOR_PRIMARY = 999 ATTR_TASKDESCRIPTION_PREFIX + "color"; 1000 private static final String ATTR_TASKDESCRIPTIONCOLOR_BACKGROUND = 1001 ATTR_TASKDESCRIPTION_PREFIX + "colorBackground"; 1002 private static final String ATTR_TASKDESCRIPTIONICONFILENAME = 1003 ATTR_TASKDESCRIPTION_PREFIX + "icon_filename"; 1004 1005 private String mLabel; 1006 private Bitmap mIcon; 1007 private String mIconFilename; 1008 private int mColorPrimary; 1009 private int mColorBackground; 1010 1011 /** 1012 * Creates the TaskDescription to the specified values. 1013 * 1014 * @param label A label and description of the current state of this task. 1015 * @param icon An icon that represents the current state of this task. 1016 * @param colorPrimary A color to override the theme's primary color. This color must be 1017 * opaque. 1018 */ 1019 public TaskDescription(String label, Bitmap icon, int colorPrimary) { 1020 this(label, icon, null, colorPrimary, 0); 1021 if ((colorPrimary != 0) && (Color.alpha(colorPrimary) != 255)) { 1022 throw new RuntimeException("A TaskDescription's primary color should be opaque"); 1023 } 1024 } 1025 1026 /** 1027 * Creates the TaskDescription to the specified values. 1028 * 1029 * @param label A label and description of the current state of this activity. 1030 * @param icon An icon that represents the current state of this activity. 1031 */ 1032 public TaskDescription(String label, Bitmap icon) { 1033 this(label, icon, null, 0, 0); 1034 } 1035 1036 /** 1037 * Creates the TaskDescription to the specified values. 1038 * 1039 * @param label A label and description of the current state of this activity. 1040 */ 1041 public TaskDescription(String label) { 1042 this(label, null, null, 0, 0); 1043 } 1044 1045 /** 1046 * Creates an empty TaskDescription. 1047 */ 1048 public TaskDescription() { 1049 this(null, null, null, 0, 0); 1050 } 1051 1052 /** @hide */ 1053 public TaskDescription(String label, Bitmap icon, String iconFilename, int colorPrimary, 1054 int colorBackground) { 1055 mLabel = label; 1056 mIcon = icon; 1057 mIconFilename = iconFilename; 1058 mColorPrimary = colorPrimary; 1059 mColorBackground = colorBackground; 1060 } 1061 1062 /** 1063 * Creates a copy of another TaskDescription. 1064 */ 1065 public TaskDescription(TaskDescription td) { 1066 copyFrom(td); 1067 } 1068 1069 /** 1070 * Copies this the values from another TaskDescription. 1071 * @hide 1072 */ 1073 public void copyFrom(TaskDescription other) { 1074 mLabel = other.mLabel; 1075 mIcon = other.mIcon; 1076 mIconFilename = other.mIconFilename; 1077 mColorPrimary = other.mColorPrimary; 1078 mColorBackground = other.mColorBackground; 1079 } 1080 1081 private TaskDescription(Parcel source) { 1082 readFromParcel(source); 1083 } 1084 1085 /** 1086 * Sets the label for this task description. 1087 * @hide 1088 */ 1089 public void setLabel(String label) { 1090 mLabel = label; 1091 } 1092 1093 /** 1094 * Sets the primary color for this task description. 1095 * @hide 1096 */ 1097 public void setPrimaryColor(int primaryColor) { 1098 // Ensure that the given color is valid 1099 if ((primaryColor != 0) && (Color.alpha(primaryColor) != 255)) { 1100 throw new RuntimeException("A TaskDescription's primary color should be opaque"); 1101 } 1102 mColorPrimary = primaryColor; 1103 } 1104 1105 /** 1106 * Sets the background color for this task description. 1107 * @hide 1108 */ 1109 public void setBackgroundColor(int backgroundColor) { 1110 // Ensure that the given color is valid 1111 if ((backgroundColor != 0) && (Color.alpha(backgroundColor) != 255)) { 1112 throw new RuntimeException("A TaskDescription's background color should be opaque"); 1113 } 1114 mColorBackground = backgroundColor; 1115 } 1116 1117 /** 1118 * Sets the icon for this task description. 1119 * @hide 1120 */ 1121 public void setIcon(Bitmap icon) { 1122 mIcon = icon; 1123 } 1124 1125 /** 1126 * Moves the icon bitmap reference from an actual Bitmap to a file containing the 1127 * bitmap. 1128 * @hide 1129 */ 1130 public void setIconFilename(String iconFilename) { 1131 mIconFilename = iconFilename; 1132 mIcon = null; 1133 } 1134 1135 /** 1136 * @return The label and description of the current state of this task. 1137 */ 1138 public String getLabel() { 1139 return mLabel; 1140 } 1141 1142 /** 1143 * @return The icon that represents the current state of this task. 1144 */ 1145 public Bitmap getIcon() { 1146 if (mIcon != null) { 1147 return mIcon; 1148 } 1149 return loadTaskDescriptionIcon(mIconFilename, UserHandle.myUserId()); 1150 } 1151 1152 /** @hide */ 1153 public String getIconFilename() { 1154 return mIconFilename; 1155 } 1156 1157 /** @hide */ 1158 public Bitmap getInMemoryIcon() { 1159 return mIcon; 1160 } 1161 1162 /** @hide */ 1163 public static Bitmap loadTaskDescriptionIcon(String iconFilename, int userId) { 1164 if (iconFilename != null) { 1165 try { 1166 return ActivityManagerNative.getDefault().getTaskDescriptionIcon(iconFilename, 1167 userId); 1168 } catch (RemoteException e) { 1169 throw e.rethrowFromSystemServer(); 1170 } 1171 } 1172 return null; 1173 } 1174 1175 /** 1176 * @return The color override on the theme's primary color. 1177 */ 1178 public int getPrimaryColor() { 1179 return mColorPrimary; 1180 } 1181 1182 /** 1183 * @return The background color. 1184 * @hide 1185 */ 1186 public int getBackgroundColor() { 1187 return mColorBackground; 1188 } 1189 1190 /** @hide */ 1191 public void saveToXml(XmlSerializer out) throws IOException { 1192 if (mLabel != null) { 1193 out.attribute(null, ATTR_TASKDESCRIPTIONLABEL, mLabel); 1194 } 1195 if (mColorPrimary != 0) { 1196 out.attribute(null, ATTR_TASKDESCRIPTIONCOLOR_PRIMARY, 1197 Integer.toHexString(mColorPrimary)); 1198 } 1199 if (mColorBackground != 0) { 1200 out.attribute(null, ATTR_TASKDESCRIPTIONCOLOR_BACKGROUND, 1201 Integer.toHexString(mColorBackground)); 1202 } 1203 if (mIconFilename != null) { 1204 out.attribute(null, ATTR_TASKDESCRIPTIONICONFILENAME, mIconFilename); 1205 } 1206 } 1207 1208 /** @hide */ 1209 public void restoreFromXml(String attrName, String attrValue) { 1210 if (ATTR_TASKDESCRIPTIONLABEL.equals(attrName)) { 1211 setLabel(attrValue); 1212 } else if (ATTR_TASKDESCRIPTIONCOLOR_PRIMARY.equals(attrName)) { 1213 setPrimaryColor((int) Long.parseLong(attrValue, 16)); 1214 } else if (ATTR_TASKDESCRIPTIONCOLOR_BACKGROUND.equals(attrName)) { 1215 setBackgroundColor((int) Long.parseLong(attrValue, 16)); 1216 } else if (ATTR_TASKDESCRIPTIONICONFILENAME.equals(attrName)) { 1217 setIconFilename(attrValue); 1218 } 1219 } 1220 1221 @Override 1222 public int describeContents() { 1223 return 0; 1224 } 1225 1226 @Override 1227 public void writeToParcel(Parcel dest, int flags) { 1228 if (mLabel == null) { 1229 dest.writeInt(0); 1230 } else { 1231 dest.writeInt(1); 1232 dest.writeString(mLabel); 1233 } 1234 if (mIcon == null) { 1235 dest.writeInt(0); 1236 } else { 1237 dest.writeInt(1); 1238 mIcon.writeToParcel(dest, 0); 1239 } 1240 dest.writeInt(mColorPrimary); 1241 dest.writeInt(mColorBackground); 1242 if (mIconFilename == null) { 1243 dest.writeInt(0); 1244 } else { 1245 dest.writeInt(1); 1246 dest.writeString(mIconFilename); 1247 } 1248 } 1249 1250 public void readFromParcel(Parcel source) { 1251 mLabel = source.readInt() > 0 ? source.readString() : null; 1252 mIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 1253 mColorPrimary = source.readInt(); 1254 mColorBackground = source.readInt(); 1255 mIconFilename = source.readInt() > 0 ? source.readString() : null; 1256 } 1257 1258 public static final Creator<TaskDescription> CREATOR 1259 = new Creator<TaskDescription>() { 1260 public TaskDescription createFromParcel(Parcel source) { 1261 return new TaskDescription(source); 1262 } 1263 public TaskDescription[] newArray(int size) { 1264 return new TaskDescription[size]; 1265 } 1266 }; 1267 1268 @Override 1269 public String toString() { 1270 return "TaskDescription Label: " + mLabel + " Icon: " + mIcon + 1271 " IconFilename: " + mIconFilename + " colorPrimary: " + mColorPrimary + 1272 " colorBackground: " + mColorBackground; 1273 } 1274 } 1275 1276 /** 1277 * Information you can retrieve about tasks that the user has most recently 1278 * started or visited. 1279 */ 1280 public static class RecentTaskInfo implements Parcelable { 1281 /** 1282 * If this task is currently running, this is the identifier for it. 1283 * If it is not running, this will be -1. 1284 */ 1285 public int id; 1286 1287 /** 1288 * The true identifier of this task, valid even if it is not running. 1289 */ 1290 public int persistentId; 1291 1292 /** 1293 * The original Intent used to launch the task. You can use this 1294 * Intent to re-launch the task (if it is no longer running) or bring 1295 * the current task to the front. 1296 */ 1297 public Intent baseIntent; 1298 1299 /** 1300 * If this task was started from an alias, this is the actual 1301 * activity component that was initially started; the component of 1302 * the baseIntent in this case is the name of the actual activity 1303 * implementation that the alias referred to. Otherwise, this is null. 1304 */ 1305 public ComponentName origActivity; 1306 1307 /** 1308 * The actual activity component that started the task. 1309 * @hide 1310 */ 1311 @Nullable 1312 public ComponentName realActivity; 1313 1314 /** 1315 * Description of the task's last state. 1316 */ 1317 public CharSequence description; 1318 1319 /** 1320 * The id of the ActivityStack this Task was on most recently. 1321 * @hide 1322 */ 1323 public int stackId; 1324 1325 /** 1326 * The id of the user the task was running as. 1327 * @hide 1328 */ 1329 public int userId; 1330 1331 /** 1332 * The first time this task was active. 1333 * @hide 1334 */ 1335 public long firstActiveTime; 1336 1337 /** 1338 * The last time this task was active. 1339 * @hide 1340 */ 1341 public long lastActiveTime; 1342 1343 /** 1344 * The recent activity values for the highest activity in the stack to have set the values. 1345 * {@link Activity#setTaskDescription(android.app.ActivityManager.TaskDescription)}. 1346 */ 1347 public TaskDescription taskDescription; 1348 1349 /** 1350 * Task affiliation for grouping with other tasks. 1351 */ 1352 public int affiliatedTaskId; 1353 1354 /** 1355 * Task affiliation color of the source task with the affiliated task id. 1356 * 1357 * @hide 1358 */ 1359 public int affiliatedTaskColor; 1360 1361 /** 1362 * The component launched as the first activity in the task. 1363 * This can be considered the "application" of this task. 1364 */ 1365 public ComponentName baseActivity; 1366 1367 /** 1368 * The activity component at the top of the history stack of the task. 1369 * This is what the user is currently doing. 1370 */ 1371 public ComponentName topActivity; 1372 1373 /** 1374 * Number of activities in this task. 1375 */ 1376 public int numActivities; 1377 1378 /** 1379 * The bounds of the task. 1380 * @hide 1381 */ 1382 public Rect bounds; 1383 1384 /** 1385 * True if the task can go in the docked stack. 1386 * @hide 1387 */ 1388 public boolean isDockable; 1389 1390 /** 1391 * The resize mode of the task. See {@link ActivityInfo#resizeMode}. 1392 * @hide 1393 */ 1394 public int resizeMode; 1395 1396 public RecentTaskInfo() { 1397 } 1398 1399 @Override 1400 public int describeContents() { 1401 return 0; 1402 } 1403 1404 @Override 1405 public void writeToParcel(Parcel dest, int flags) { 1406 dest.writeInt(id); 1407 dest.writeInt(persistentId); 1408 if (baseIntent != null) { 1409 dest.writeInt(1); 1410 baseIntent.writeToParcel(dest, 0); 1411 } else { 1412 dest.writeInt(0); 1413 } 1414 ComponentName.writeToParcel(origActivity, dest); 1415 ComponentName.writeToParcel(realActivity, dest); 1416 TextUtils.writeToParcel(description, dest, 1417 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 1418 if (taskDescription != null) { 1419 dest.writeInt(1); 1420 taskDescription.writeToParcel(dest, 0); 1421 } else { 1422 dest.writeInt(0); 1423 } 1424 dest.writeInt(stackId); 1425 dest.writeInt(userId); 1426 dest.writeLong(firstActiveTime); 1427 dest.writeLong(lastActiveTime); 1428 dest.writeInt(affiliatedTaskId); 1429 dest.writeInt(affiliatedTaskColor); 1430 ComponentName.writeToParcel(baseActivity, dest); 1431 ComponentName.writeToParcel(topActivity, dest); 1432 dest.writeInt(numActivities); 1433 if (bounds != null) { 1434 dest.writeInt(1); 1435 bounds.writeToParcel(dest, 0); 1436 } else { 1437 dest.writeInt(0); 1438 } 1439 dest.writeInt(isDockable ? 1 : 0); 1440 dest.writeInt(resizeMode); 1441 } 1442 1443 public void readFromParcel(Parcel source) { 1444 id = source.readInt(); 1445 persistentId = source.readInt(); 1446 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 1447 origActivity = ComponentName.readFromParcel(source); 1448 realActivity = ComponentName.readFromParcel(source); 1449 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 1450 taskDescription = source.readInt() > 0 ? 1451 TaskDescription.CREATOR.createFromParcel(source) : null; 1452 stackId = source.readInt(); 1453 userId = source.readInt(); 1454 firstActiveTime = source.readLong(); 1455 lastActiveTime = source.readLong(); 1456 affiliatedTaskId = source.readInt(); 1457 affiliatedTaskColor = source.readInt(); 1458 baseActivity = ComponentName.readFromParcel(source); 1459 topActivity = ComponentName.readFromParcel(source); 1460 numActivities = source.readInt(); 1461 bounds = source.readInt() > 0 ? 1462 Rect.CREATOR.createFromParcel(source) : null; 1463 isDockable = source.readInt() == 1; 1464 resizeMode = source.readInt(); 1465 } 1466 1467 public static final Creator<RecentTaskInfo> CREATOR 1468 = new Creator<RecentTaskInfo>() { 1469 public RecentTaskInfo createFromParcel(Parcel source) { 1470 return new RecentTaskInfo(source); 1471 } 1472 public RecentTaskInfo[] newArray(int size) { 1473 return new RecentTaskInfo[size]; 1474 } 1475 }; 1476 1477 private RecentTaskInfo(Parcel source) { 1478 readFromParcel(source); 1479 } 1480 } 1481 1482 /** 1483 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 1484 * that have set their 1485 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 1486 */ 1487 public static final int RECENT_WITH_EXCLUDED = 0x0001; 1488 1489 /** 1490 * Provides a list that does not contain any 1491 * recent tasks that currently are not available to the user. 1492 */ 1493 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 1494 1495 /** 1496 * Provides a list that contains recent tasks for all 1497 * profiles of a user. 1498 * @hide 1499 */ 1500 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 1501 1502 /** 1503 * Ignores all tasks that are on the home stack. 1504 * @hide 1505 */ 1506 public static final int RECENT_IGNORE_HOME_STACK_TASKS = 0x0008; 1507 1508 /** 1509 * Ignores the top task in the docked stack. 1510 * @hide 1511 */ 1512 public static final int RECENT_INGORE_DOCKED_STACK_TOP_TASK = 0x0010; 1513 1514 /** 1515 * Ignores all tasks that are on the pinned stack. 1516 * @hide 1517 */ 1518 public static final int RECENT_INGORE_PINNED_STACK_TASKS = 0x0020; 1519 1520 /** 1521 * <p></p>Return a list of the tasks that the user has recently launched, with 1522 * the most recent being first and older ones after in order. 1523 * 1524 * <p><b>Note: this method is only intended for debugging and presenting 1525 * task management user interfaces</b>. This should never be used for 1526 * core logic in an application, such as deciding between different 1527 * behaviors based on the information found here. Such uses are 1528 * <em>not</em> supported, and will likely break in the future. For 1529 * example, if multiple applications can be actively running at the 1530 * same time, assumptions made about the meaning of the data here for 1531 * purposes of control flow will be incorrect.</p> 1532 * 1533 * @deprecated As of {@link android.os.Build.VERSION_CODES#LOLLIPOP}, this method is 1534 * no longer available to third party applications: the introduction of 1535 * document-centric recents means 1536 * it can leak personal information to the caller. For backwards compatibility, 1537 * it will still return a small subset of its data: at least the caller's 1538 * own tasks (though see {@link #getAppTasks()} for the correct supported 1539 * way to retrieve that information), and possibly some other tasks 1540 * such as home that are known to not be sensitive. 1541 * 1542 * @param maxNum The maximum number of entries to return in the list. The 1543 * actual number returned may be smaller, depending on how many tasks the 1544 * user has started and the maximum number the system can remember. 1545 * @param flags Information about what to return. May be any combination 1546 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 1547 * 1548 * @return Returns a list of RecentTaskInfo records describing each of 1549 * the recent tasks. 1550 */ 1551 @Deprecated 1552 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 1553 throws SecurityException { 1554 try { 1555 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 1556 flags, UserHandle.myUserId()).getList(); 1557 } catch (RemoteException e) { 1558 throw e.rethrowFromSystemServer(); 1559 } 1560 } 1561 1562 /** 1563 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 1564 * specific user. It requires holding 1565 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 1566 * @param maxNum The maximum number of entries to return in the list. The 1567 * actual number returned may be smaller, depending on how many tasks the 1568 * user has started and the maximum number the system can remember. 1569 * @param flags Information about what to return. May be any combination 1570 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 1571 * 1572 * @return Returns a list of RecentTaskInfo records describing each of 1573 * the recent tasks. Most recently activated tasks go first. 1574 * 1575 * @hide 1576 */ 1577 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 1578 throws SecurityException { 1579 try { 1580 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 1581 flags, userId).getList(); 1582 } catch (RemoteException e) { 1583 throw e.rethrowFromSystemServer(); 1584 } 1585 } 1586 1587 /** 1588 * Information you can retrieve about a particular task that is currently 1589 * "running" in the system. Note that a running task does not mean the 1590 * given task actually has a process it is actively running in; it simply 1591 * means that the user has gone to it and never closed it, but currently 1592 * the system may have killed its process and is only holding on to its 1593 * last state in order to restart it when the user returns. 1594 */ 1595 public static class RunningTaskInfo implements Parcelable { 1596 /** 1597 * A unique identifier for this task. 1598 */ 1599 public int id; 1600 1601 /** 1602 * The stack that currently contains this task. 1603 * @hide 1604 */ 1605 public int stackId; 1606 1607 /** 1608 * The component launched as the first activity in the task. This can 1609 * be considered the "application" of this task. 1610 */ 1611 public ComponentName baseActivity; 1612 1613 /** 1614 * The activity component at the top of the history stack of the task. 1615 * This is what the user is currently doing. 1616 */ 1617 public ComponentName topActivity; 1618 1619 /** 1620 * Thumbnail representation of the task's current state. Currently 1621 * always null. 1622 */ 1623 public Bitmap thumbnail; 1624 1625 /** 1626 * Description of the task's current state. 1627 */ 1628 public CharSequence description; 1629 1630 /** 1631 * Number of activities in this task. 1632 */ 1633 public int numActivities; 1634 1635 /** 1636 * Number of activities that are currently running (not stopped 1637 * and persisted) in this task. 1638 */ 1639 public int numRunning; 1640 1641 /** 1642 * Last time task was run. For sorting. 1643 * @hide 1644 */ 1645 public long lastActiveTime; 1646 1647 /** 1648 * True if the task can go in the docked stack. 1649 * @hide 1650 */ 1651 public boolean isDockable; 1652 1653 /** 1654 * The resize mode of the task. See {@link ActivityInfo#resizeMode}. 1655 * @hide 1656 */ 1657 public int resizeMode; 1658 1659 public RunningTaskInfo() { 1660 } 1661 1662 public int describeContents() { 1663 return 0; 1664 } 1665 1666 public void writeToParcel(Parcel dest, int flags) { 1667 dest.writeInt(id); 1668 dest.writeInt(stackId); 1669 ComponentName.writeToParcel(baseActivity, dest); 1670 ComponentName.writeToParcel(topActivity, dest); 1671 if (thumbnail != null) { 1672 dest.writeInt(1); 1673 thumbnail.writeToParcel(dest, 0); 1674 } else { 1675 dest.writeInt(0); 1676 } 1677 TextUtils.writeToParcel(description, dest, 1678 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 1679 dest.writeInt(numActivities); 1680 dest.writeInt(numRunning); 1681 dest.writeInt(isDockable ? 1 : 0); 1682 dest.writeInt(resizeMode); 1683 } 1684 1685 public void readFromParcel(Parcel source) { 1686 id = source.readInt(); 1687 stackId = source.readInt(); 1688 baseActivity = ComponentName.readFromParcel(source); 1689 topActivity = ComponentName.readFromParcel(source); 1690 if (source.readInt() != 0) { 1691 thumbnail = Bitmap.CREATOR.createFromParcel(source); 1692 } else { 1693 thumbnail = null; 1694 } 1695 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 1696 numActivities = source.readInt(); 1697 numRunning = source.readInt(); 1698 isDockable = source.readInt() != 0; 1699 resizeMode = source.readInt(); 1700 } 1701 1702 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 1703 public RunningTaskInfo createFromParcel(Parcel source) { 1704 return new RunningTaskInfo(source); 1705 } 1706 public RunningTaskInfo[] newArray(int size) { 1707 return new RunningTaskInfo[size]; 1708 } 1709 }; 1710 1711 private RunningTaskInfo(Parcel source) { 1712 readFromParcel(source); 1713 } 1714 } 1715 1716 /** 1717 * Get the list of tasks associated with the calling application. 1718 * 1719 * @return The list of tasks associated with the application making this call. 1720 * @throws SecurityException 1721 */ 1722 public List<ActivityManager.AppTask> getAppTasks() { 1723 ArrayList<AppTask> tasks = new ArrayList<AppTask>(); 1724 List<IAppTask> appTasks; 1725 try { 1726 appTasks = ActivityManagerNative.getDefault().getAppTasks(mContext.getPackageName()); 1727 } catch (RemoteException e) { 1728 throw e.rethrowFromSystemServer(); 1729 } 1730 int numAppTasks = appTasks.size(); 1731 for (int i = 0; i < numAppTasks; i++) { 1732 tasks.add(new AppTask(appTasks.get(i))); 1733 } 1734 return tasks; 1735 } 1736 1737 /** 1738 * Return the current design dimensions for {@link AppTask} thumbnails, for use 1739 * with {@link #addAppTask}. 1740 */ 1741 public Size getAppTaskThumbnailSize() { 1742 synchronized (this) { 1743 ensureAppTaskThumbnailSizeLocked(); 1744 return new Size(mAppTaskThumbnailSize.x, mAppTaskThumbnailSize.y); 1745 } 1746 } 1747 1748 private void ensureAppTaskThumbnailSizeLocked() { 1749 if (mAppTaskThumbnailSize == null) { 1750 try { 1751 mAppTaskThumbnailSize = ActivityManagerNative.getDefault().getAppTaskThumbnailSize(); 1752 } catch (RemoteException e) { 1753 throw e.rethrowFromSystemServer(); 1754 } 1755 } 1756 } 1757 1758 /** 1759 * Add a new {@link AppTask} for the calling application. This will create a new 1760 * recents entry that is added to the <b>end</b> of all existing recents. 1761 * 1762 * @param activity The activity that is adding the entry. This is used to help determine 1763 * the context that the new recents entry will be in. 1764 * @param intent The Intent that describes the recents entry. This is the same Intent that 1765 * you would have used to launch the activity for it. In generally you will want to set 1766 * both {@link Intent#FLAG_ACTIVITY_NEW_DOCUMENT} and 1767 * {@link Intent#FLAG_ACTIVITY_RETAIN_IN_RECENTS}; the latter is required since this recents 1768 * entry will exist without an activity, so it doesn't make sense to not retain it when 1769 * its activity disappears. The given Intent here also must have an explicit ComponentName 1770 * set on it. 1771 * @param description Optional additional description information. 1772 * @param thumbnail Thumbnail to use for the recents entry. Should be the size given by 1773 * {@link #getAppTaskThumbnailSize()}. If the bitmap is not that exact size, it will be 1774 * recreated in your process, probably in a way you don't like, before the recents entry 1775 * is added. 1776 * 1777 * @return Returns the task id of the newly added app task, or -1 if the add failed. The 1778 * most likely cause of failure is that there is no more room for more tasks for your app. 1779 */ 1780 public int addAppTask(@NonNull Activity activity, @NonNull Intent intent, 1781 @Nullable TaskDescription description, @NonNull Bitmap thumbnail) { 1782 Point size; 1783 synchronized (this) { 1784 ensureAppTaskThumbnailSizeLocked(); 1785 size = mAppTaskThumbnailSize; 1786 } 1787 final int tw = thumbnail.getWidth(); 1788 final int th = thumbnail.getHeight(); 1789 if (tw != size.x || th != size.y) { 1790 Bitmap bm = Bitmap.createBitmap(size.x, size.y, thumbnail.getConfig()); 1791 1792 // Use ScaleType.CENTER_CROP, except we leave the top edge at the top. 1793 float scale; 1794 float dx = 0, dy = 0; 1795 if (tw * size.x > size.y * th) { 1796 scale = (float) size.x / (float) th; 1797 dx = (size.y - tw * scale) * 0.5f; 1798 } else { 1799 scale = (float) size.y / (float) tw; 1800 dy = (size.x - th * scale) * 0.5f; 1801 } 1802 Matrix matrix = new Matrix(); 1803 matrix.setScale(scale, scale); 1804 matrix.postTranslate((int) (dx + 0.5f), 0); 1805 1806 Canvas canvas = new Canvas(bm); 1807 canvas.drawBitmap(thumbnail, matrix, null); 1808 canvas.setBitmap(null); 1809 1810 thumbnail = bm; 1811 } 1812 if (description == null) { 1813 description = new TaskDescription(); 1814 } 1815 try { 1816 return ActivityManagerNative.getDefault().addAppTask(activity.getActivityToken(), 1817 intent, description, thumbnail); 1818 } catch (RemoteException e) { 1819 throw e.rethrowFromSystemServer(); 1820 } 1821 } 1822 1823 /** 1824 * Return a list of the tasks that are currently running, with 1825 * the most recent being first and older ones after in order. Note that 1826 * "running" does not mean any of the task's code is currently loaded or 1827 * activity -- the task may have been frozen by the system, so that it 1828 * can be restarted in its previous state when next brought to the 1829 * foreground. 1830 * 1831 * <p><b>Note: this method is only intended for debugging and presenting 1832 * task management user interfaces</b>. This should never be used for 1833 * core logic in an application, such as deciding between different 1834 * behaviors based on the information found here. Such uses are 1835 * <em>not</em> supported, and will likely break in the future. For 1836 * example, if multiple applications can be actively running at the 1837 * same time, assumptions made about the meaning of the data here for 1838 * purposes of control flow will be incorrect.</p> 1839 * 1840 * @deprecated As of {@link android.os.Build.VERSION_CODES#LOLLIPOP}, this method 1841 * is no longer available to third party 1842 * applications: the introduction of document-centric recents means 1843 * it can leak person information to the caller. For backwards compatibility, 1844 * it will still retu rn a small subset of its data: at least the caller's 1845 * own tasks, and possibly some other tasks 1846 * such as home that are known to not be sensitive. 1847 * 1848 * @param maxNum The maximum number of entries to return in the list. The 1849 * actual number returned may be smaller, depending on how many tasks the 1850 * user has started. 1851 * 1852 * @return Returns a list of RunningTaskInfo records describing each of 1853 * the running tasks. 1854 */ 1855 @Deprecated 1856 public List<RunningTaskInfo> getRunningTasks(int maxNum) 1857 throws SecurityException { 1858 try { 1859 return ActivityManagerNative.getDefault().getTasks(maxNum, 0); 1860 } catch (RemoteException e) { 1861 throw e.rethrowFromSystemServer(); 1862 } 1863 } 1864 1865 /** 1866 * Completely remove the given task. 1867 * 1868 * @param taskId Identifier of the task to be removed. 1869 * @return Returns true if the given task was found and removed. 1870 * 1871 * @hide 1872 */ 1873 public boolean removeTask(int taskId) throws SecurityException { 1874 try { 1875 return ActivityManagerNative.getDefault().removeTask(taskId); 1876 } catch (RemoteException e) { 1877 throw e.rethrowFromSystemServer(); 1878 } 1879 } 1880 1881 /** 1882 * Metadata related to the {@link TaskThumbnail}. 1883 * 1884 * @hide 1885 */ 1886 public static class TaskThumbnailInfo implements Parcelable { 1887 /** @hide */ 1888 public static final String ATTR_TASK_THUMBNAILINFO_PREFIX = "task_thumbnailinfo_"; 1889 private static final String ATTR_TASK_WIDTH = 1890 ATTR_TASK_THUMBNAILINFO_PREFIX + "task_width"; 1891 private static final String ATTR_TASK_HEIGHT = 1892 ATTR_TASK_THUMBNAILINFO_PREFIX + "task_height"; 1893 private static final String ATTR_SCREEN_ORIENTATION = 1894 ATTR_TASK_THUMBNAILINFO_PREFIX + "screen_orientation"; 1895 1896 public int taskWidth; 1897 public int taskHeight; 1898 public int screenOrientation = Configuration.ORIENTATION_UNDEFINED; 1899 1900 public TaskThumbnailInfo() { 1901 // Do nothing 1902 } 1903 1904 private TaskThumbnailInfo(Parcel source) { 1905 readFromParcel(source); 1906 } 1907 1908 /** 1909 * Resets this info state to the initial state. 1910 * @hide 1911 */ 1912 public void reset() { 1913 taskWidth = 0; 1914 taskHeight = 0; 1915 screenOrientation = Configuration.ORIENTATION_UNDEFINED; 1916 } 1917 1918 /** 1919 * Copies from another ThumbnailInfo. 1920 */ 1921 public void copyFrom(TaskThumbnailInfo o) { 1922 taskWidth = o.taskWidth; 1923 taskHeight = o.taskHeight; 1924 screenOrientation = o.screenOrientation; 1925 } 1926 1927 /** @hide */ 1928 public void saveToXml(XmlSerializer out) throws IOException { 1929 out.attribute(null, ATTR_TASK_WIDTH, Integer.toString(taskWidth)); 1930 out.attribute(null, ATTR_TASK_HEIGHT, Integer.toString(taskHeight)); 1931 out.attribute(null, ATTR_SCREEN_ORIENTATION, Integer.toString(screenOrientation)); 1932 } 1933 1934 /** @hide */ 1935 public void restoreFromXml(String attrName, String attrValue) { 1936 if (ATTR_TASK_WIDTH.equals(attrName)) { 1937 taskWidth = Integer.parseInt(attrValue); 1938 } else if (ATTR_TASK_HEIGHT.equals(attrName)) { 1939 taskHeight = Integer.parseInt(attrValue); 1940 } else if (ATTR_SCREEN_ORIENTATION.equals(attrName)) { 1941 screenOrientation = Integer.parseInt(attrValue); 1942 } 1943 } 1944 1945 public int describeContents() { 1946 return 0; 1947 } 1948 1949 public void writeToParcel(Parcel dest, int flags) { 1950 dest.writeInt(taskWidth); 1951 dest.writeInt(taskHeight); 1952 dest.writeInt(screenOrientation); 1953 } 1954 1955 public void readFromParcel(Parcel source) { 1956 taskWidth = source.readInt(); 1957 taskHeight = source.readInt(); 1958 screenOrientation = source.readInt(); 1959 } 1960 1961 public static final Creator<TaskThumbnailInfo> CREATOR = new Creator<TaskThumbnailInfo>() { 1962 public TaskThumbnailInfo createFromParcel(Parcel source) { 1963 return new TaskThumbnailInfo(source); 1964 } 1965 public TaskThumbnailInfo[] newArray(int size) { 1966 return new TaskThumbnailInfo[size]; 1967 } 1968 }; 1969 } 1970 1971 /** @hide */ 1972 public static class TaskThumbnail implements Parcelable { 1973 public Bitmap mainThumbnail; 1974 public ParcelFileDescriptor thumbnailFileDescriptor; 1975 public TaskThumbnailInfo thumbnailInfo; 1976 1977 public TaskThumbnail() { 1978 } 1979 1980 private TaskThumbnail(Parcel source) { 1981 readFromParcel(source); 1982 } 1983 1984 public int describeContents() { 1985 if (thumbnailFileDescriptor != null) { 1986 return thumbnailFileDescriptor.describeContents(); 1987 } 1988 return 0; 1989 } 1990 1991 public void writeToParcel(Parcel dest, int flags) { 1992 if (mainThumbnail != null) { 1993 dest.writeInt(1); 1994 mainThumbnail.writeToParcel(dest, flags); 1995 } else { 1996 dest.writeInt(0); 1997 } 1998 if (thumbnailFileDescriptor != null) { 1999 dest.writeInt(1); 2000 thumbnailFileDescriptor.writeToParcel(dest, flags); 2001 } else { 2002 dest.writeInt(0); 2003 } 2004 if (thumbnailInfo != null) { 2005 dest.writeInt(1); 2006 thumbnailInfo.writeToParcel(dest, flags); 2007 } else { 2008 dest.writeInt(0); 2009 } 2010 } 2011 2012 public void readFromParcel(Parcel source) { 2013 if (source.readInt() != 0) { 2014 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 2015 } else { 2016 mainThumbnail = null; 2017 } 2018 if (source.readInt() != 0) { 2019 thumbnailFileDescriptor = ParcelFileDescriptor.CREATOR.createFromParcel(source); 2020 } else { 2021 thumbnailFileDescriptor = null; 2022 } 2023 if (source.readInt() != 0) { 2024 thumbnailInfo = TaskThumbnailInfo.CREATOR.createFromParcel(source); 2025 } else { 2026 thumbnailInfo = null; 2027 } 2028 } 2029 2030 public static final Creator<TaskThumbnail> CREATOR = new Creator<TaskThumbnail>() { 2031 public TaskThumbnail createFromParcel(Parcel source) { 2032 return new TaskThumbnail(source); 2033 } 2034 public TaskThumbnail[] newArray(int size) { 2035 return new TaskThumbnail[size]; 2036 } 2037 }; 2038 } 2039 2040 /** @hide */ 2041 public TaskThumbnail getTaskThumbnail(int id) throws SecurityException { 2042 try { 2043 return ActivityManagerNative.getDefault().getTaskThumbnail(id); 2044 } catch (RemoteException e) { 2045 throw e.rethrowFromSystemServer(); 2046 } 2047 } 2048 2049 /** @hide */ 2050 public boolean isInHomeStack(int taskId) { 2051 try { 2052 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 2053 } catch (RemoteException e) { 2054 throw e.rethrowFromSystemServer(); 2055 } 2056 } 2057 2058 /** 2059 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 2060 * activity along with the task, so it is positioned immediately behind 2061 * the task. 2062 */ 2063 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 2064 2065 /** 2066 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 2067 * user-instigated action, so the current activity will not receive a 2068 * hint that the user is leaving. 2069 */ 2070 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 2071 2072 /** 2073 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 2074 * with a null options argument. 2075 * 2076 * @param taskId The identifier of the task to be moved, as found in 2077 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 2078 * @param flags Additional operational flags, 0 or more of 2079 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 2080 */ 2081 public void moveTaskToFront(int taskId, int flags) { 2082 moveTaskToFront(taskId, flags, null); 2083 } 2084 2085 /** 2086 * Ask that the task associated with a given task ID be moved to the 2087 * front of the stack, so it is now visible to the user. Requires that 2088 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 2089 * or a SecurityException will be thrown. 2090 * 2091 * @param taskId The identifier of the task to be moved, as found in 2092 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 2093 * @param flags Additional operational flags, 0 or more of 2094 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 2095 * @param options Additional options for the operation, either null or 2096 * as per {@link Context#startActivity(Intent, android.os.Bundle) 2097 * Context.startActivity(Intent, Bundle)}. 2098 */ 2099 public void moveTaskToFront(int taskId, int flags, Bundle options) { 2100 try { 2101 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 2102 } catch (RemoteException e) { 2103 throw e.rethrowFromSystemServer(); 2104 } 2105 } 2106 2107 /** 2108 * Information you can retrieve about a particular Service that is 2109 * currently running in the system. 2110 */ 2111 public static class RunningServiceInfo implements Parcelable { 2112 /** 2113 * The service component. 2114 */ 2115 public ComponentName service; 2116 2117 /** 2118 * If non-zero, this is the process the service is running in. 2119 */ 2120 public int pid; 2121 2122 /** 2123 * The UID that owns this service. 2124 */ 2125 public int uid; 2126 2127 /** 2128 * The name of the process this service runs in. 2129 */ 2130 public String process; 2131 2132 /** 2133 * Set to true if the service has asked to run as a foreground process. 2134 */ 2135 public boolean foreground; 2136 2137 /** 2138 * The time when the service was first made active, either by someone 2139 * starting or binding to it. This 2140 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 2141 */ 2142 public long activeSince; 2143 2144 /** 2145 * Set to true if this service has been explicitly started. 2146 */ 2147 public boolean started; 2148 2149 /** 2150 * Number of clients connected to the service. 2151 */ 2152 public int clientCount; 2153 2154 /** 2155 * Number of times the service's process has crashed while the service 2156 * is running. 2157 */ 2158 public int crashCount; 2159 2160 /** 2161 * The time when there was last activity in the service (either 2162 * explicit requests to start it or clients binding to it). This 2163 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 2164 */ 2165 public long lastActivityTime; 2166 2167 /** 2168 * If non-zero, this service is not currently running, but scheduled to 2169 * restart at the given time. 2170 */ 2171 public long restarting; 2172 2173 /** 2174 * Bit for {@link #flags}: set if this service has been 2175 * explicitly started. 2176 */ 2177 public static final int FLAG_STARTED = 1<<0; 2178 2179 /** 2180 * Bit for {@link #flags}: set if the service has asked to 2181 * run as a foreground process. 2182 */ 2183 public static final int FLAG_FOREGROUND = 1<<1; 2184 2185 /** 2186 * Bit for {@link #flags}: set if the service is running in a 2187 * core system process. 2188 */ 2189 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 2190 2191 /** 2192 * Bit for {@link #flags}: set if the service is running in a 2193 * persistent process. 2194 */ 2195 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 2196 2197 /** 2198 * Running flags. 2199 */ 2200 public int flags; 2201 2202 /** 2203 * For special services that are bound to by system code, this is 2204 * the package that holds the binding. 2205 */ 2206 public String clientPackage; 2207 2208 /** 2209 * For special services that are bound to by system code, this is 2210 * a string resource providing a user-visible label for who the 2211 * client is. 2212 */ 2213 public int clientLabel; 2214 2215 public RunningServiceInfo() { 2216 } 2217 2218 public int describeContents() { 2219 return 0; 2220 } 2221 2222 public void writeToParcel(Parcel dest, int flags) { 2223 ComponentName.writeToParcel(service, dest); 2224 dest.writeInt(pid); 2225 dest.writeInt(uid); 2226 dest.writeString(process); 2227 dest.writeInt(foreground ? 1 : 0); 2228 dest.writeLong(activeSince); 2229 dest.writeInt(started ? 1 : 0); 2230 dest.writeInt(clientCount); 2231 dest.writeInt(crashCount); 2232 dest.writeLong(lastActivityTime); 2233 dest.writeLong(restarting); 2234 dest.writeInt(this.flags); 2235 dest.writeString(clientPackage); 2236 dest.writeInt(clientLabel); 2237 } 2238 2239 public void readFromParcel(Parcel source) { 2240 service = ComponentName.readFromParcel(source); 2241 pid = source.readInt(); 2242 uid = source.readInt(); 2243 process = source.readString(); 2244 foreground = source.readInt() != 0; 2245 activeSince = source.readLong(); 2246 started = source.readInt() != 0; 2247 clientCount = source.readInt(); 2248 crashCount = source.readInt(); 2249 lastActivityTime = source.readLong(); 2250 restarting = source.readLong(); 2251 flags = source.readInt(); 2252 clientPackage = source.readString(); 2253 clientLabel = source.readInt(); 2254 } 2255 2256 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 2257 public RunningServiceInfo createFromParcel(Parcel source) { 2258 return new RunningServiceInfo(source); 2259 } 2260 public RunningServiceInfo[] newArray(int size) { 2261 return new RunningServiceInfo[size]; 2262 } 2263 }; 2264 2265 private RunningServiceInfo(Parcel source) { 2266 readFromParcel(source); 2267 } 2268 } 2269 2270 /** 2271 * Return a list of the services that are currently running. 2272 * 2273 * <p><b>Note: this method is only intended for debugging or implementing 2274 * service management type user interfaces.</b></p> 2275 * 2276 * @param maxNum The maximum number of entries to return in the list. The 2277 * actual number returned may be smaller, depending on how many services 2278 * are running. 2279 * 2280 * @return Returns a list of RunningServiceInfo records describing each of 2281 * the running tasks. 2282 */ 2283 public List<RunningServiceInfo> getRunningServices(int maxNum) 2284 throws SecurityException { 2285 try { 2286 return ActivityManagerNative.getDefault() 2287 .getServices(maxNum, 0); 2288 } catch (RemoteException e) { 2289 throw e.rethrowFromSystemServer(); 2290 } 2291 } 2292 2293 /** 2294 * Returns a PendingIntent you can start to show a control panel for the 2295 * given running service. If the service does not have a control panel, 2296 * null is returned. 2297 */ 2298 public PendingIntent getRunningServiceControlPanel(ComponentName service) 2299 throws SecurityException { 2300 try { 2301 return ActivityManagerNative.getDefault() 2302 .getRunningServiceControlPanel(service); 2303 } catch (RemoteException e) { 2304 throw e.rethrowFromSystemServer(); 2305 } 2306 } 2307 2308 /** 2309 * Information you can retrieve about the available memory through 2310 * {@link ActivityManager#getMemoryInfo}. 2311 */ 2312 public static class MemoryInfo implements Parcelable { 2313 /** 2314 * The available memory on the system. This number should not 2315 * be considered absolute: due to the nature of the kernel, a significant 2316 * portion of this memory is actually in use and needed for the overall 2317 * system to run well. 2318 */ 2319 public long availMem; 2320 2321 /** 2322 * The total memory accessible by the kernel. This is basically the 2323 * RAM size of the device, not including below-kernel fixed allocations 2324 * like DMA buffers, RAM for the baseband CPU, etc. 2325 */ 2326 public long totalMem; 2327 2328 /** 2329 * The threshold of {@link #availMem} at which we consider memory to be 2330 * low and start killing background services and other non-extraneous 2331 * processes. 2332 */ 2333 public long threshold; 2334 2335 /** 2336 * Set to true if the system considers itself to currently be in a low 2337 * memory situation. 2338 */ 2339 public boolean lowMemory; 2340 2341 /** @hide */ 2342 public long hiddenAppThreshold; 2343 /** @hide */ 2344 public long secondaryServerThreshold; 2345 /** @hide */ 2346 public long visibleAppThreshold; 2347 /** @hide */ 2348 public long foregroundAppThreshold; 2349 2350 public MemoryInfo() { 2351 } 2352 2353 public int describeContents() { 2354 return 0; 2355 } 2356 2357 public void writeToParcel(Parcel dest, int flags) { 2358 dest.writeLong(availMem); 2359 dest.writeLong(totalMem); 2360 dest.writeLong(threshold); 2361 dest.writeInt(lowMemory ? 1 : 0); 2362 dest.writeLong(hiddenAppThreshold); 2363 dest.writeLong(secondaryServerThreshold); 2364 dest.writeLong(visibleAppThreshold); 2365 dest.writeLong(foregroundAppThreshold); 2366 } 2367 2368 public void readFromParcel(Parcel source) { 2369 availMem = source.readLong(); 2370 totalMem = source.readLong(); 2371 threshold = source.readLong(); 2372 lowMemory = source.readInt() != 0; 2373 hiddenAppThreshold = source.readLong(); 2374 secondaryServerThreshold = source.readLong(); 2375 visibleAppThreshold = source.readLong(); 2376 foregroundAppThreshold = source.readLong(); 2377 } 2378 2379 public static final Creator<MemoryInfo> CREATOR 2380 = new Creator<MemoryInfo>() { 2381 public MemoryInfo createFromParcel(Parcel source) { 2382 return new MemoryInfo(source); 2383 } 2384 public MemoryInfo[] newArray(int size) { 2385 return new MemoryInfo[size]; 2386 } 2387 }; 2388 2389 private MemoryInfo(Parcel source) { 2390 readFromParcel(source); 2391 } 2392 } 2393 2394 /** 2395 * Return general information about the memory state of the system. This 2396 * can be used to help decide how to manage your own memory, though note 2397 * that polling is not recommended and 2398 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 2399 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 2400 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 2401 * level of your process as needed, which gives a better hint for how to 2402 * manage its memory. 2403 */ 2404 public void getMemoryInfo(MemoryInfo outInfo) { 2405 try { 2406 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 2407 } catch (RemoteException e) { 2408 throw e.rethrowFromSystemServer(); 2409 } 2410 } 2411 2412 /** 2413 * Information you can retrieve about an ActivityStack in the system. 2414 * @hide 2415 */ 2416 public static class StackInfo implements Parcelable { 2417 public int stackId; 2418 public Rect bounds = new Rect(); 2419 public int[] taskIds; 2420 public String[] taskNames; 2421 public Rect[] taskBounds; 2422 public int[] taskUserIds; 2423 public ComponentName topActivity; 2424 public int displayId; 2425 public int userId; 2426 public boolean visible; 2427 // Index of the stack in the display's stack list, can be used for comparison of stack order 2428 public int position; 2429 2430 @Override 2431 public int describeContents() { 2432 return 0; 2433 } 2434 2435 @Override 2436 public void writeToParcel(Parcel dest, int flags) { 2437 dest.writeInt(stackId); 2438 dest.writeInt(bounds.left); 2439 dest.writeInt(bounds.top); 2440 dest.writeInt(bounds.right); 2441 dest.writeInt(bounds.bottom); 2442 dest.writeIntArray(taskIds); 2443 dest.writeStringArray(taskNames); 2444 final int boundsCount = taskBounds == null ? 0 : taskBounds.length; 2445 dest.writeInt(boundsCount); 2446 for (int i = 0; i < boundsCount; i++) { 2447 dest.writeInt(taskBounds[i].left); 2448 dest.writeInt(taskBounds[i].top); 2449 dest.writeInt(taskBounds[i].right); 2450 dest.writeInt(taskBounds[i].bottom); 2451 } 2452 dest.writeIntArray(taskUserIds); 2453 dest.writeInt(displayId); 2454 dest.writeInt(userId); 2455 dest.writeInt(visible ? 1 : 0); 2456 dest.writeInt(position); 2457 if (topActivity != null) { 2458 dest.writeInt(1); 2459 topActivity.writeToParcel(dest, 0); 2460 } else { 2461 dest.writeInt(0); 2462 } 2463 } 2464 2465 public void readFromParcel(Parcel source) { 2466 stackId = source.readInt(); 2467 bounds = new Rect( 2468 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 2469 taskIds = source.createIntArray(); 2470 taskNames = source.createStringArray(); 2471 final int boundsCount = source.readInt(); 2472 if (boundsCount > 0) { 2473 taskBounds = new Rect[boundsCount]; 2474 for (int i = 0; i < boundsCount; i++) { 2475 taskBounds[i] = new Rect(); 2476 taskBounds[i].set( 2477 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 2478 } 2479 } else { 2480 taskBounds = null; 2481 } 2482 taskUserIds = source.createIntArray(); 2483 displayId = source.readInt(); 2484 userId = source.readInt(); 2485 visible = source.readInt() > 0; 2486 position = source.readInt(); 2487 if (source.readInt() > 0) { 2488 topActivity = ComponentName.readFromParcel(source); 2489 } 2490 } 2491 2492 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 2493 @Override 2494 public StackInfo createFromParcel(Parcel source) { 2495 return new StackInfo(source); 2496 } 2497 @Override 2498 public StackInfo[] newArray(int size) { 2499 return new StackInfo[size]; 2500 } 2501 }; 2502 2503 public StackInfo() { 2504 } 2505 2506 private StackInfo(Parcel source) { 2507 readFromParcel(source); 2508 } 2509 2510 public String toString(String prefix) { 2511 StringBuilder sb = new StringBuilder(256); 2512 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 2513 sb.append(" bounds="); sb.append(bounds.toShortString()); 2514 sb.append(" displayId="); sb.append(displayId); 2515 sb.append(" userId="); sb.append(userId); 2516 sb.append("\n"); 2517 prefix = prefix + " "; 2518 for (int i = 0; i < taskIds.length; ++i) { 2519 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 2520 sb.append(": "); sb.append(taskNames[i]); 2521 if (taskBounds != null) { 2522 sb.append(" bounds="); sb.append(taskBounds[i].toShortString()); 2523 } 2524 sb.append(" userId=").append(taskUserIds[i]); 2525 sb.append(" visible=").append(visible); 2526 if (topActivity != null) { 2527 sb.append(" topActivity=").append(topActivity); 2528 } 2529 sb.append("\n"); 2530 } 2531 return sb.toString(); 2532 } 2533 2534 @Override 2535 public String toString() { 2536 return toString(""); 2537 } 2538 } 2539 2540 /** 2541 * @hide 2542 */ 2543 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 2544 try { 2545 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 2546 observer, UserHandle.myUserId()); 2547 } catch (RemoteException e) { 2548 throw e.rethrowFromSystemServer(); 2549 } 2550 } 2551 2552 /** 2553 * Permits an application to erase its own data from disk. This is equivalent to 2554 * the user choosing to clear the app's data from within the device settings UI. It 2555 * erases all dynamic data associated with the app -- its private data and data in its 2556 * private area on external storage -- but does not remove the installed application 2557 * itself, nor any OBB files. 2558 * 2559 * @return {@code true} if the application successfully requested that the application's 2560 * data be erased; {@code false} otherwise. 2561 */ 2562 public boolean clearApplicationUserData() { 2563 return clearApplicationUserData(mContext.getPackageName(), null); 2564 } 2565 2566 2567 /** 2568 * Permits an application to get the persistent URI permissions granted to another. 2569 * 2570 * <p>Typically called by Settings. 2571 * 2572 * @param packageName application to look for the granted permissions 2573 * @return list of granted URI permissions 2574 * 2575 * @hide 2576 */ 2577 public ParceledListSlice<UriPermission> getGrantedUriPermissions(String packageName) { 2578 try { 2579 return ActivityManagerNative.getDefault().getGrantedUriPermissions(packageName, 2580 UserHandle.myUserId()); 2581 } catch (RemoteException e) { 2582 throw e.rethrowFromSystemServer(); 2583 } 2584 } 2585 2586 /** 2587 * Permits an application to clear the persistent URI permissions granted to another. 2588 * 2589 * <p>Typically called by Settings. 2590 * 2591 * @param packageName application to clear its granted permissions 2592 * 2593 * @hide 2594 */ 2595 public void clearGrantedUriPermissions(String packageName) { 2596 try { 2597 ActivityManagerNative.getDefault().clearGrantedUriPermissions(packageName, 2598 UserHandle.myUserId()); 2599 } catch (RemoteException e) { 2600 throw e.rethrowFromSystemServer(); 2601 } 2602 } 2603 2604 /** 2605 * Information you can retrieve about any processes that are in an error condition. 2606 */ 2607 public static class ProcessErrorStateInfo implements Parcelable { 2608 /** 2609 * Condition codes 2610 */ 2611 public static final int NO_ERROR = 0; 2612 public static final int CRASHED = 1; 2613 public static final int NOT_RESPONDING = 2; 2614 2615 /** 2616 * The condition that the process is in. 2617 */ 2618 public int condition; 2619 2620 /** 2621 * The process name in which the crash or error occurred. 2622 */ 2623 public String processName; 2624 2625 /** 2626 * The pid of this process; 0 if none 2627 */ 2628 public int pid; 2629 2630 /** 2631 * The kernel user-ID that has been assigned to this process; 2632 * currently this is not a unique ID (multiple applications can have 2633 * the same uid). 2634 */ 2635 public int uid; 2636 2637 /** 2638 * The activity name associated with the error, if known. May be null. 2639 */ 2640 public String tag; 2641 2642 /** 2643 * A short message describing the error condition. 2644 */ 2645 public String shortMsg; 2646 2647 /** 2648 * A long message describing the error condition. 2649 */ 2650 public String longMsg; 2651 2652 /** 2653 * The stack trace where the error originated. May be null. 2654 */ 2655 public String stackTrace; 2656 2657 /** 2658 * to be deprecated: This value will always be null. 2659 */ 2660 public byte[] crashData = null; 2661 2662 public ProcessErrorStateInfo() { 2663 } 2664 2665 @Override 2666 public int describeContents() { 2667 return 0; 2668 } 2669 2670 @Override 2671 public void writeToParcel(Parcel dest, int flags) { 2672 dest.writeInt(condition); 2673 dest.writeString(processName); 2674 dest.writeInt(pid); 2675 dest.writeInt(uid); 2676 dest.writeString(tag); 2677 dest.writeString(shortMsg); 2678 dest.writeString(longMsg); 2679 dest.writeString(stackTrace); 2680 } 2681 2682 public void readFromParcel(Parcel source) { 2683 condition = source.readInt(); 2684 processName = source.readString(); 2685 pid = source.readInt(); 2686 uid = source.readInt(); 2687 tag = source.readString(); 2688 shortMsg = source.readString(); 2689 longMsg = source.readString(); 2690 stackTrace = source.readString(); 2691 } 2692 2693 public static final Creator<ProcessErrorStateInfo> CREATOR = 2694 new Creator<ProcessErrorStateInfo>() { 2695 public ProcessErrorStateInfo createFromParcel(Parcel source) { 2696 return new ProcessErrorStateInfo(source); 2697 } 2698 public ProcessErrorStateInfo[] newArray(int size) { 2699 return new ProcessErrorStateInfo[size]; 2700 } 2701 }; 2702 2703 private ProcessErrorStateInfo(Parcel source) { 2704 readFromParcel(source); 2705 } 2706 } 2707 2708 /** 2709 * Returns a list of any processes that are currently in an error condition. The result 2710 * will be null if all processes are running properly at this time. 2711 * 2712 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 2713 * current error conditions (it will not return an empty list). This list ordering is not 2714 * specified. 2715 */ 2716 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 2717 try { 2718 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 2719 } catch (RemoteException e) { 2720 throw e.rethrowFromSystemServer(); 2721 } 2722 } 2723 2724 /** 2725 * Information you can retrieve about a running process. 2726 */ 2727 public static class RunningAppProcessInfo implements Parcelable { 2728 /** 2729 * The name of the process that this object is associated with 2730 */ 2731 public String processName; 2732 2733 /** 2734 * The pid of this process; 0 if none 2735 */ 2736 public int pid; 2737 2738 /** 2739 * The user id of this process. 2740 */ 2741 public int uid; 2742 2743 /** 2744 * All packages that have been loaded into the process. 2745 */ 2746 public String pkgList[]; 2747 2748 /** 2749 * Constant for {@link #flags}: this is an app that is unable to 2750 * correctly save its state when going to the background, 2751 * so it can not be killed while in the background. 2752 * @hide 2753 */ 2754 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 2755 2756 /** 2757 * Constant for {@link #flags}: this process is associated with a 2758 * persistent system app. 2759 * @hide 2760 */ 2761 public static final int FLAG_PERSISTENT = 1<<1; 2762 2763 /** 2764 * Constant for {@link #flags}: this process is associated with a 2765 * persistent system app. 2766 * @hide 2767 */ 2768 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 2769 2770 /** 2771 * Flags of information. May be any of 2772 * {@link #FLAG_CANT_SAVE_STATE}. 2773 * @hide 2774 */ 2775 public int flags; 2776 2777 /** 2778 * Last memory trim level reported to the process: corresponds to 2779 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 2780 * ComponentCallbacks2.onTrimMemory(int)}. 2781 */ 2782 public int lastTrimLevel; 2783 2784 /** 2785 * Constant for {@link #importance}: This process is running the 2786 * foreground UI; that is, it is the thing currently at the top of the screen 2787 * that the user is interacting with. 2788 */ 2789 public static final int IMPORTANCE_FOREGROUND = 100; 2790 2791 /** 2792 * Constant for {@link #importance}: This process is running a foreground 2793 * service, for example to perform music playback even while the user is 2794 * not immediately in the app. This generally indicates that the process 2795 * is doing something the user actively cares about. 2796 */ 2797 public static final int IMPORTANCE_FOREGROUND_SERVICE = 125; 2798 2799 /** 2800 * Constant for {@link #importance}: This process is running the foreground 2801 * UI, but the device is asleep so it is not visible to the user. This means 2802 * the user is not really aware of the process, because they can not see or 2803 * interact with it, but it is quite important because it what they expect to 2804 * return to once unlocking the device. 2805 */ 2806 public static final int IMPORTANCE_TOP_SLEEPING = 150; 2807 2808 /** 2809 * Constant for {@link #importance}: This process is running something 2810 * that is actively visible to the user, though not in the immediate 2811 * foreground. This may be running a window that is behind the current 2812 * foreground (so paused and with its state saved, not interacting with 2813 * the user, but visible to them to some degree); it may also be running 2814 * other services under the system's control that it inconsiders important. 2815 */ 2816 public static final int IMPORTANCE_VISIBLE = 200; 2817 2818 /** 2819 * Constant for {@link #importance}: This process is not something the user 2820 * is directly aware of, but is otherwise perceptable to them to some degree. 2821 */ 2822 public static final int IMPORTANCE_PERCEPTIBLE = 130; 2823 2824 /** 2825 * Constant for {@link #importance}: This process is running an 2826 * application that can not save its state, and thus can't be killed 2827 * while in the background. 2828 * @hide 2829 */ 2830 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 2831 2832 /** 2833 * Constant for {@link #importance}: This process is contains services 2834 * that should remain running. These are background services apps have 2835 * started, not something the user is aware of, so they may be killed by 2836 * the system relatively freely (though it is generally desired that they 2837 * stay running as long as they want to). 2838 */ 2839 public static final int IMPORTANCE_SERVICE = 300; 2840 2841 /** 2842 * Constant for {@link #importance}: This process process contains 2843 * background code that is expendable. 2844 */ 2845 public static final int IMPORTANCE_BACKGROUND = 400; 2846 2847 /** 2848 * Constant for {@link #importance}: This process is empty of any 2849 * actively running code. 2850 */ 2851 public static final int IMPORTANCE_EMPTY = 500; 2852 2853 /** 2854 * Constant for {@link #importance}: This process does not exist. 2855 */ 2856 public static final int IMPORTANCE_GONE = 1000; 2857 2858 /** @hide */ 2859 public static int procStateToImportance(int procState) { 2860 if (procState == PROCESS_STATE_NONEXISTENT) { 2861 return IMPORTANCE_GONE; 2862 } else if (procState >= PROCESS_STATE_HOME) { 2863 return IMPORTANCE_BACKGROUND; 2864 } else if (procState >= PROCESS_STATE_SERVICE) { 2865 return IMPORTANCE_SERVICE; 2866 } else if (procState > PROCESS_STATE_HEAVY_WEIGHT) { 2867 return IMPORTANCE_CANT_SAVE_STATE; 2868 } else if (procState >= PROCESS_STATE_IMPORTANT_BACKGROUND) { 2869 return IMPORTANCE_PERCEPTIBLE; 2870 } else if (procState >= PROCESS_STATE_IMPORTANT_FOREGROUND) { 2871 return IMPORTANCE_VISIBLE; 2872 } else if (procState >= PROCESS_STATE_TOP_SLEEPING) { 2873 return IMPORTANCE_TOP_SLEEPING; 2874 } else if (procState >= PROCESS_STATE_FOREGROUND_SERVICE) { 2875 return IMPORTANCE_FOREGROUND_SERVICE; 2876 } else { 2877 return IMPORTANCE_FOREGROUND; 2878 } 2879 } 2880 2881 /** 2882 * The relative importance level that the system places on this 2883 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 2884 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 2885 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 2886 * constants are numbered so that "more important" values are always 2887 * smaller than "less important" values. 2888 */ 2889 public int importance; 2890 2891 /** 2892 * An additional ordering within a particular {@link #importance} 2893 * category, providing finer-grained information about the relative 2894 * utility of processes within a category. This number means nothing 2895 * except that a smaller values are more recently used (and thus 2896 * more important). Currently an LRU value is only maintained for 2897 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 2898 * be maintained in the future. 2899 */ 2900 public int lru; 2901 2902 /** 2903 * Constant for {@link #importanceReasonCode}: nothing special has 2904 * been specified for the reason for this level. 2905 */ 2906 public static final int REASON_UNKNOWN = 0; 2907 2908 /** 2909 * Constant for {@link #importanceReasonCode}: one of the application's 2910 * content providers is being used by another process. The pid of 2911 * the client process is in {@link #importanceReasonPid} and the 2912 * target provider in this process is in 2913 * {@link #importanceReasonComponent}. 2914 */ 2915 public static final int REASON_PROVIDER_IN_USE = 1; 2916 2917 /** 2918 * Constant for {@link #importanceReasonCode}: one of the application's 2919 * content providers is being used by another process. The pid of 2920 * the client process is in {@link #importanceReasonPid} and the 2921 * target provider in this process is in 2922 * {@link #importanceReasonComponent}. 2923 */ 2924 public static final int REASON_SERVICE_IN_USE = 2; 2925 2926 /** 2927 * The reason for {@link #importance}, if any. 2928 */ 2929 public int importanceReasonCode; 2930 2931 /** 2932 * For the specified values of {@link #importanceReasonCode}, this 2933 * is the process ID of the other process that is a client of this 2934 * process. This will be 0 if no other process is using this one. 2935 */ 2936 public int importanceReasonPid; 2937 2938 /** 2939 * For the specified values of {@link #importanceReasonCode}, this 2940 * is the name of the component that is being used in this process. 2941 */ 2942 public ComponentName importanceReasonComponent; 2943 2944 /** 2945 * When {@link #importanceReasonPid} is non-0, this is the importance 2946 * of the other pid. @hide 2947 */ 2948 public int importanceReasonImportance; 2949 2950 /** 2951 * Current process state, as per PROCESS_STATE_* constants. 2952 * @hide 2953 */ 2954 public int processState; 2955 2956 public RunningAppProcessInfo() { 2957 importance = IMPORTANCE_FOREGROUND; 2958 importanceReasonCode = REASON_UNKNOWN; 2959 processState = PROCESS_STATE_IMPORTANT_FOREGROUND; 2960 } 2961 2962 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 2963 processName = pProcessName; 2964 pid = pPid; 2965 pkgList = pArr; 2966 } 2967 2968 public int describeContents() { 2969 return 0; 2970 } 2971 2972 public void writeToParcel(Parcel dest, int flags) { 2973 dest.writeString(processName); 2974 dest.writeInt(pid); 2975 dest.writeInt(uid); 2976 dest.writeStringArray(pkgList); 2977 dest.writeInt(this.flags); 2978 dest.writeInt(lastTrimLevel); 2979 dest.writeInt(importance); 2980 dest.writeInt(lru); 2981 dest.writeInt(importanceReasonCode); 2982 dest.writeInt(importanceReasonPid); 2983 ComponentName.writeToParcel(importanceReasonComponent, dest); 2984 dest.writeInt(importanceReasonImportance); 2985 dest.writeInt(processState); 2986 } 2987 2988 public void readFromParcel(Parcel source) { 2989 processName = source.readString(); 2990 pid = source.readInt(); 2991 uid = source.readInt(); 2992 pkgList = source.readStringArray(); 2993 flags = source.readInt(); 2994 lastTrimLevel = source.readInt(); 2995 importance = source.readInt(); 2996 lru = source.readInt(); 2997 importanceReasonCode = source.readInt(); 2998 importanceReasonPid = source.readInt(); 2999 importanceReasonComponent = ComponentName.readFromParcel(source); 3000 importanceReasonImportance = source.readInt(); 3001 processState = source.readInt(); 3002 } 3003 3004 public static final Creator<RunningAppProcessInfo> CREATOR = 3005 new Creator<RunningAppProcessInfo>() { 3006 public RunningAppProcessInfo createFromParcel(Parcel source) { 3007 return new RunningAppProcessInfo(source); 3008 } 3009 public RunningAppProcessInfo[] newArray(int size) { 3010 return new RunningAppProcessInfo[size]; 3011 } 3012 }; 3013 3014 private RunningAppProcessInfo(Parcel source) { 3015 readFromParcel(source); 3016 } 3017 } 3018 3019 /** 3020 * Returns a list of application processes installed on external media 3021 * that are running on the device. 3022 * 3023 * <p><b>Note: this method is only intended for debugging or building 3024 * a user-facing process management UI.</b></p> 3025 * 3026 * @return Returns a list of ApplicationInfo records, or null if none 3027 * This list ordering is not specified. 3028 * @hide 3029 */ 3030 public List<ApplicationInfo> getRunningExternalApplications() { 3031 try { 3032 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 3033 } catch (RemoteException e) { 3034 throw e.rethrowFromSystemServer(); 3035 } 3036 } 3037 3038 /** 3039 * Sets the memory trim mode for a process and schedules a memory trim operation. 3040 * 3041 * <p><b>Note: this method is only intended for testing framework.</b></p> 3042 * 3043 * @return Returns true if successful. 3044 * @hide 3045 */ 3046 public boolean setProcessMemoryTrimLevel(String process, int userId, int level) { 3047 try { 3048 return ActivityManagerNative.getDefault().setProcessMemoryTrimLevel(process, userId, 3049 level); 3050 } catch (RemoteException e) { 3051 throw e.rethrowFromSystemServer(); 3052 } 3053 } 3054 3055 /** 3056 * Returns a list of application processes that are running on the device. 3057 * 3058 * <p><b>Note: this method is only intended for debugging or building 3059 * a user-facing process management UI.</b></p> 3060 * 3061 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 3062 * running processes (it will not return an empty list). This list ordering is not 3063 * specified. 3064 */ 3065 public List<RunningAppProcessInfo> getRunningAppProcesses() { 3066 try { 3067 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 3068 } catch (RemoteException e) { 3069 throw e.rethrowFromSystemServer(); 3070 } 3071 } 3072 3073 /** 3074 * Return the importance of a given package name, based on the processes that are 3075 * currently running. The return value is one of the importance constants defined 3076 * in {@link RunningAppProcessInfo}, giving you the highest importance of all the 3077 * processes that this package has code running inside of. If there are no processes 3078 * running its code, {@link RunningAppProcessInfo#IMPORTANCE_GONE} is returned. 3079 * @hide 3080 */ 3081 @SystemApi 3082 public int getPackageImportance(String packageName) { 3083 try { 3084 int procState = ActivityManagerNative.getDefault().getPackageProcessState(packageName, 3085 mContext.getOpPackageName()); 3086 return RunningAppProcessInfo.procStateToImportance(procState); 3087 } catch (RemoteException e) { 3088 throw e.rethrowFromSystemServer(); 3089 } 3090 } 3091 3092 /** 3093 * Return global memory state information for the calling process. This 3094 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 3095 * only fields that will be filled in are 3096 * {@link RunningAppProcessInfo#pid}, 3097 * {@link RunningAppProcessInfo#uid}, 3098 * {@link RunningAppProcessInfo#lastTrimLevel}, 3099 * {@link RunningAppProcessInfo#importance}, 3100 * {@link RunningAppProcessInfo#lru}, and 3101 * {@link RunningAppProcessInfo#importanceReasonCode}. 3102 */ 3103 static public void getMyMemoryState(RunningAppProcessInfo outState) { 3104 try { 3105 ActivityManagerNative.getDefault().getMyMemoryState(outState); 3106 } catch (RemoteException e) { 3107 throw e.rethrowFromSystemServer(); 3108 } 3109 } 3110 3111 /** 3112 * Return information about the memory usage of one or more processes. 3113 * 3114 * <p><b>Note: this method is only intended for debugging or building 3115 * a user-facing process management UI.</b></p> 3116 * 3117 * @param pids The pids of the processes whose memory usage is to be 3118 * retrieved. 3119 * @return Returns an array of memory information, one for each 3120 * requested pid. 3121 */ 3122 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 3123 try { 3124 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 3125 } catch (RemoteException e) { 3126 throw e.rethrowFromSystemServer(); 3127 } 3128 } 3129 3130 /** 3131 * @deprecated This is now just a wrapper for 3132 * {@link #killBackgroundProcesses(String)}; the previous behavior here 3133 * is no longer available to applications because it allows them to 3134 * break other applications by removing their alarms, stopping their 3135 * services, etc. 3136 */ 3137 @Deprecated 3138 public void restartPackage(String packageName) { 3139 killBackgroundProcesses(packageName); 3140 } 3141 3142 /** 3143 * Have the system immediately kill all background processes associated 3144 * with the given package. This is the same as the kernel killing those 3145 * processes to reclaim memory; the system will take care of restarting 3146 * these processes in the future as needed. 3147 * 3148 * <p>You must hold the permission 3149 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 3150 * call this method. 3151 * 3152 * @param packageName The name of the package whose processes are to 3153 * be killed. 3154 */ 3155 public void killBackgroundProcesses(String packageName) { 3156 try { 3157 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 3158 UserHandle.myUserId()); 3159 } catch (RemoteException e) { 3160 throw e.rethrowFromSystemServer(); 3161 } 3162 } 3163 3164 /** 3165 * Kills the specified UID. 3166 * @param uid The UID to kill. 3167 * @param reason The reason for the kill. 3168 * 3169 * @hide 3170 */ 3171 @SystemApi 3172 @RequiresPermission(Manifest.permission.KILL_UID) 3173 public void killUid(int uid, String reason) { 3174 try { 3175 ActivityManagerNative.getDefault().killUid(UserHandle.getAppId(uid), 3176 UserHandle.getUserId(uid), reason); 3177 } catch (RemoteException e) { 3178 throw e.rethrowFromSystemServer(); 3179 } 3180 } 3181 3182 /** 3183 * Have the system perform a force stop of everything associated with 3184 * the given application package. All processes that share its uid 3185 * will be killed, all services it has running stopped, all activities 3186 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 3187 * broadcast will be sent, so that any of its registered alarms can 3188 * be stopped, notifications removed, etc. 3189 * 3190 * <p>You must hold the permission 3191 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 3192 * call this method. 3193 * 3194 * @param packageName The name of the package to be stopped. 3195 * @param userId The user for which the running package is to be stopped. 3196 * 3197 * @hide This is not available to third party applications due to 3198 * it allowing them to break other applications by stopping their 3199 * services, removing their alarms, etc. 3200 */ 3201 public void forceStopPackageAsUser(String packageName, int userId) { 3202 try { 3203 ActivityManagerNative.getDefault().forceStopPackage(packageName, userId); 3204 } catch (RemoteException e) { 3205 throw e.rethrowFromSystemServer(); 3206 } 3207 } 3208 3209 /** 3210 * @see #forceStopPackageAsUser(String, int) 3211 * @hide 3212 */ 3213 public void forceStopPackage(String packageName) { 3214 forceStopPackageAsUser(packageName, UserHandle.myUserId()); 3215 } 3216 3217 /** 3218 * Get the device configuration attributes. 3219 */ 3220 public ConfigurationInfo getDeviceConfigurationInfo() { 3221 try { 3222 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 3223 } catch (RemoteException e) { 3224 throw e.rethrowFromSystemServer(); 3225 } 3226 } 3227 3228 /** 3229 * Get the preferred density of icons for the launcher. This is used when 3230 * custom drawables are created (e.g., for shortcuts). 3231 * 3232 * @return density in terms of DPI 3233 */ 3234 public int getLauncherLargeIconDensity() { 3235 final Resources res = mContext.getResources(); 3236 final int density = res.getDisplayMetrics().densityDpi; 3237 final int sw = res.getConfiguration().smallestScreenWidthDp; 3238 3239 if (sw < 600) { 3240 // Smaller than approx 7" tablets, use the regular icon size. 3241 return density; 3242 } 3243 3244 switch (density) { 3245 case DisplayMetrics.DENSITY_LOW: 3246 return DisplayMetrics.DENSITY_MEDIUM; 3247 case DisplayMetrics.DENSITY_MEDIUM: 3248 return DisplayMetrics.DENSITY_HIGH; 3249 case DisplayMetrics.DENSITY_TV: 3250 return DisplayMetrics.DENSITY_XHIGH; 3251 case DisplayMetrics.DENSITY_HIGH: 3252 return DisplayMetrics.DENSITY_XHIGH; 3253 case DisplayMetrics.DENSITY_XHIGH: 3254 return DisplayMetrics.DENSITY_XXHIGH; 3255 case DisplayMetrics.DENSITY_XXHIGH: 3256 return DisplayMetrics.DENSITY_XHIGH * 2; 3257 default: 3258 // The density is some abnormal value. Return some other 3259 // abnormal value that is a reasonable scaling of it. 3260 return (int)((density*1.5f)+.5f); 3261 } 3262 } 3263 3264 /** 3265 * Get the preferred launcher icon size. This is used when custom drawables 3266 * are created (e.g., for shortcuts). 3267 * 3268 * @return dimensions of square icons in terms of pixels 3269 */ 3270 public int getLauncherLargeIconSize() { 3271 return getLauncherLargeIconSizeInner(mContext); 3272 } 3273 3274 static int getLauncherLargeIconSizeInner(Context context) { 3275 final Resources res = context.getResources(); 3276 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 3277 final int sw = res.getConfiguration().smallestScreenWidthDp; 3278 3279 if (sw < 600) { 3280 // Smaller than approx 7" tablets, use the regular icon size. 3281 return size; 3282 } 3283 3284 final int density = res.getDisplayMetrics().densityDpi; 3285 3286 switch (density) { 3287 case DisplayMetrics.DENSITY_LOW: 3288 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 3289 case DisplayMetrics.DENSITY_MEDIUM: 3290 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 3291 case DisplayMetrics.DENSITY_TV: 3292 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 3293 case DisplayMetrics.DENSITY_HIGH: 3294 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 3295 case DisplayMetrics.DENSITY_XHIGH: 3296 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 3297 case DisplayMetrics.DENSITY_XXHIGH: 3298 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 3299 default: 3300 // The density is some abnormal value. Return some other 3301 // abnormal value that is a reasonable scaling of it. 3302 return (int)((size*1.5f) + .5f); 3303 } 3304 } 3305 3306 /** 3307 * Returns "true" if the user interface is currently being messed with 3308 * by a monkey. 3309 */ 3310 public static boolean isUserAMonkey() { 3311 try { 3312 return ActivityManagerNative.getDefault().isUserAMonkey(); 3313 } catch (RemoteException e) { 3314 throw e.rethrowFromSystemServer(); 3315 } 3316 } 3317 3318 /** 3319 * Returns "true" if device is running in a test harness. 3320 */ 3321 public static boolean isRunningInTestHarness() { 3322 return SystemProperties.getBoolean("ro.test_harness", false); 3323 } 3324 3325 /** 3326 * Returns the launch count of each installed package. 3327 * 3328 * @hide 3329 */ 3330 /*public Map<String, Integer> getAllPackageLaunchCounts() { 3331 try { 3332 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 3333 ServiceManager.getService("usagestats")); 3334 if (usageStatsService == null) { 3335 return new HashMap<String, Integer>(); 3336 } 3337 3338 UsageStats.PackageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats( 3339 ActivityThread.currentPackageName()); 3340 if (allPkgUsageStats == null) { 3341 return new HashMap<String, Integer>(); 3342 } 3343 3344 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 3345 for (UsageStats.PackageStats pkgUsageStats : allPkgUsageStats) { 3346 launchCounts.put(pkgUsageStats.getPackageName(), pkgUsageStats.getLaunchCount()); 3347 } 3348 3349 return launchCounts; 3350 } catch (RemoteException e) { 3351 Log.w(TAG, "Could not query launch counts", e); 3352 return new HashMap<String, Integer>(); 3353 } 3354 }*/ 3355 3356 /** @hide */ 3357 public static int checkComponentPermission(String permission, int uid, 3358 int owningUid, boolean exported) { 3359 // Root, system server get to do everything. 3360 final int appId = UserHandle.getAppId(uid); 3361 if (appId == Process.ROOT_UID || appId == Process.SYSTEM_UID) { 3362 return PackageManager.PERMISSION_GRANTED; 3363 } 3364 // Isolated processes don't get any permissions. 3365 if (UserHandle.isIsolated(uid)) { 3366 return PackageManager.PERMISSION_DENIED; 3367 } 3368 // If there is a uid that owns whatever is being accessed, it has 3369 // blanket access to it regardless of the permissions it requires. 3370 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 3371 return PackageManager.PERMISSION_GRANTED; 3372 } 3373 // If the target is not exported, then nobody else can get to it. 3374 if (!exported) { 3375 /* 3376 RuntimeException here = new RuntimeException("here"); 3377 here.fillInStackTrace(); 3378 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 3379 here); 3380 */ 3381 return PackageManager.PERMISSION_DENIED; 3382 } 3383 if (permission == null) { 3384 return PackageManager.PERMISSION_GRANTED; 3385 } 3386 try { 3387 return AppGlobals.getPackageManager() 3388 .checkUidPermission(permission, uid); 3389 } catch (RemoteException e) { 3390 throw e.rethrowFromSystemServer(); 3391 } 3392 } 3393 3394 /** @hide */ 3395 public static int checkUidPermission(String permission, int uid) { 3396 try { 3397 return AppGlobals.getPackageManager() 3398 .checkUidPermission(permission, uid); 3399 } catch (RemoteException e) { 3400 throw e.rethrowFromSystemServer(); 3401 } 3402 } 3403 3404 /** 3405 * @hide 3406 * Helper for dealing with incoming user arguments to system service calls. 3407 * Takes care of checking permissions and converting USER_CURRENT to the 3408 * actual current user. 3409 * 3410 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 3411 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 3412 * @param userId The user id argument supplied by the caller -- this is the user 3413 * they want to run as. 3414 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 3415 * to get a USER_ALL returned and deal with it correctly. If false, 3416 * an exception will be thrown if USER_ALL is supplied. 3417 * @param requireFull If true, the caller must hold 3418 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 3419 * different user than their current process; otherwise they must hold 3420 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 3421 * @param name Optional textual name of the incoming call; only for generating error messages. 3422 * @param callerPackage Optional package name of caller; only for error messages. 3423 * 3424 * @return Returns the user ID that the call should run as. Will always be a concrete 3425 * user number, unless <var>allowAll</var> is true in which case it could also be 3426 * USER_ALL. 3427 */ 3428 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 3429 boolean allowAll, boolean requireFull, String name, String callerPackage) { 3430 if (UserHandle.getUserId(callingUid) == userId) { 3431 return userId; 3432 } 3433 try { 3434 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 3435 callingUid, userId, allowAll, requireFull, name, callerPackage); 3436 } catch (RemoteException e) { 3437 throw e.rethrowFromSystemServer(); 3438 } 3439 } 3440 3441 /** 3442 * Gets the userId of the current foreground user. Requires system permissions. 3443 * @hide 3444 */ 3445 @SystemApi 3446 public static int getCurrentUser() { 3447 UserInfo ui; 3448 try { 3449 ui = ActivityManagerNative.getDefault().getCurrentUser(); 3450 return ui != null ? ui.id : 0; 3451 } catch (RemoteException e) { 3452 throw e.rethrowFromSystemServer(); 3453 } 3454 } 3455 3456 /** 3457 * @param userid the user's id. Zero indicates the default user. 3458 * @hide 3459 */ 3460 public boolean switchUser(int userid) { 3461 try { 3462 return ActivityManagerNative.getDefault().switchUser(userid); 3463 } catch (RemoteException e) { 3464 throw e.rethrowFromSystemServer(); 3465 } 3466 } 3467 3468 /** 3469 * Logs out current current foreground user by switching to the system user and stopping the 3470 * user being switched from. 3471 * @hide 3472 */ 3473 public static void logoutCurrentUser() { 3474 int currentUser = ActivityManager.getCurrentUser(); 3475 if (currentUser != UserHandle.USER_SYSTEM) { 3476 try { 3477 ActivityManagerNative.getDefault().switchUser(UserHandle.USER_SYSTEM); 3478 ActivityManagerNative.getDefault().stopUser(currentUser, /* force= */ false, null); 3479 } catch (RemoteException e) { 3480 e.rethrowFromSystemServer(); 3481 } 3482 } 3483 } 3484 3485 /** {@hide} */ 3486 public static final int FLAG_OR_STOPPED = 1 << 0; 3487 /** {@hide} */ 3488 public static final int FLAG_AND_LOCKED = 1 << 1; 3489 /** {@hide} */ 3490 public static final int FLAG_AND_UNLOCKED = 1 << 2; 3491 /** {@hide} */ 3492 public static final int FLAG_AND_UNLOCKING_OR_UNLOCKED = 1 << 3; 3493 3494 /** 3495 * Return whether the given user is actively running. This means that 3496 * the user is in the "started" state, not "stopped" -- it is currently 3497 * allowed to run code through scheduled alarms, receiving broadcasts, 3498 * etc. A started user may be either the current foreground user or a 3499 * background user; the result here does not distinguish between the two. 3500 * @param userid the user's id. Zero indicates the default user. 3501 * @hide 3502 */ 3503 public boolean isUserRunning(int userId) { 3504 try { 3505 return ActivityManagerNative.getDefault().isUserRunning(userId, 0); 3506 } catch (RemoteException e) { 3507 throw e.rethrowFromSystemServer(); 3508 } 3509 } 3510 3511 /** {@hide} */ 3512 public boolean isVrModePackageEnabled(ComponentName component) { 3513 try { 3514 return ActivityManagerNative.getDefault().isVrModePackageEnabled(component); 3515 } catch (RemoteException e) { 3516 throw e.rethrowFromSystemServer(); 3517 } 3518 } 3519 3520 /** 3521 * Perform a system dump of various state associated with the given application 3522 * package name. This call blocks while the dump is being performed, so should 3523 * not be done on a UI thread. The data will be written to the given file 3524 * descriptor as text. An application must hold the 3525 * {@link android.Manifest.permission#DUMP} permission to make this call. 3526 * @param fd The file descriptor that the dump should be written to. The file 3527 * descriptor is <em>not</em> closed by this function; the caller continues to 3528 * own it. 3529 * @param packageName The name of the package that is to be dumped. 3530 */ 3531 public void dumpPackageState(FileDescriptor fd, String packageName) { 3532 dumpPackageStateStatic(fd, packageName); 3533 } 3534 3535 /** 3536 * @hide 3537 */ 3538 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 3539 FileOutputStream fout = new FileOutputStream(fd); 3540 PrintWriter pw = new FastPrintWriter(fout); 3541 dumpService(pw, fd, "package", new String[] { packageName }); 3542 pw.println(); 3543 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 3544 "-a", "package", packageName }); 3545 pw.println(); 3546 dumpService(pw, fd, "meminfo", new String[] { "--local", "--package", packageName }); 3547 pw.println(); 3548 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { packageName }); 3549 pw.println(); 3550 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 3551 pw.println(); 3552 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 3553 pw.flush(); 3554 } 3555 3556 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 3557 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 3558 IBinder service = ServiceManager.checkService(name); 3559 if (service == null) { 3560 pw.println(" (Service not found)"); 3561 return; 3562 } 3563 TransferPipe tp = null; 3564 try { 3565 pw.flush(); 3566 tp = new TransferPipe(); 3567 tp.setBufferPrefix(" "); 3568 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 3569 tp.go(fd, 10000); 3570 } catch (Throwable e) { 3571 if (tp != null) { 3572 tp.kill(); 3573 } 3574 pw.println("Failure dumping service:"); 3575 e.printStackTrace(pw); 3576 } 3577 } 3578 3579 /** 3580 * Request that the system start watching for the calling process to exceed a pss 3581 * size as given here. Once called, the system will look for any occasions where it 3582 * sees the associated process with a larger pss size and, when this happens, automatically 3583 * pull a heap dump from it and allow the user to share the data. Note that this request 3584 * continues running even if the process is killed and restarted. To remove the watch, 3585 * use {@link #clearWatchHeapLimit()}. 3586 * 3587 * <p>This API only work if the calling process has been marked as 3588 * {@link ApplicationInfo#FLAG_DEBUGGABLE} or this is running on a debuggable 3589 * (userdebug or eng) build.</p> 3590 * 3591 * <p>Callers can optionally implement {@link #ACTION_REPORT_HEAP_LIMIT} to directly 3592 * handle heap limit reports themselves.</p> 3593 * 3594 * @param pssSize The size in bytes to set the limit at. 3595 */ 3596 public void setWatchHeapLimit(long pssSize) { 3597 try { 3598 ActivityManagerNative.getDefault().setDumpHeapDebugLimit(null, 0, pssSize, 3599 mContext.getPackageName()); 3600 } catch (RemoteException e) { 3601 throw e.rethrowFromSystemServer(); 3602 } 3603 } 3604 3605 /** 3606 * Action an app can implement to handle reports from {@link #setWatchHeapLimit(long)}. 3607 * If your package has an activity handling this action, it will be launched with the 3608 * heap data provided to it the same way as {@link Intent#ACTION_SEND}. Note that to 3609 * match the activty must support this action and a MIME type of "*/*". 3610 */ 3611 public static final String ACTION_REPORT_HEAP_LIMIT = "android.app.action.REPORT_HEAP_LIMIT"; 3612 3613 /** 3614 * Clear a heap watch limit previously set by {@link #setWatchHeapLimit(long)}. 3615 */ 3616 public void clearWatchHeapLimit() { 3617 try { 3618 ActivityManagerNative.getDefault().setDumpHeapDebugLimit(null, 0, 0, null); 3619 } catch (RemoteException e) { 3620 throw e.rethrowFromSystemServer(); 3621 } 3622 } 3623 3624 /** 3625 * @hide 3626 */ 3627 public void startLockTaskMode(int taskId) { 3628 try { 3629 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 3630 } catch (RemoteException e) { 3631 throw e.rethrowFromSystemServer(); 3632 } 3633 } 3634 3635 /** 3636 * @hide 3637 */ 3638 public void stopLockTaskMode() { 3639 try { 3640 ActivityManagerNative.getDefault().stopLockTaskMode(); 3641 } catch (RemoteException e) { 3642 throw e.rethrowFromSystemServer(); 3643 } 3644 } 3645 3646 /** 3647 * Return whether currently in lock task mode. When in this mode 3648 * no new tasks can be created or switched to. 3649 * 3650 * @see Activity#startLockTask() 3651 * 3652 * @deprecated Use {@link #getLockTaskModeState} instead. 3653 */ 3654 public boolean isInLockTaskMode() { 3655 return getLockTaskModeState() != LOCK_TASK_MODE_NONE; 3656 } 3657 3658 /** 3659 * Return the current state of task locking. The three possible outcomes 3660 * are {@link #LOCK_TASK_MODE_NONE}, {@link #LOCK_TASK_MODE_LOCKED} 3661 * and {@link #LOCK_TASK_MODE_PINNED}. 3662 * 3663 * @see Activity#startLockTask() 3664 */ 3665 public int getLockTaskModeState() { 3666 try { 3667 return ActivityManagerNative.getDefault().getLockTaskModeState(); 3668 } catch (RemoteException e) { 3669 throw e.rethrowFromSystemServer(); 3670 } 3671 } 3672 3673 /** 3674 * Enable more aggressive scheduling for latency-sensitive low-runtime VR threads. Only one 3675 * thread can be a VR thread in a process at a time, and that thread may be subject to 3676 * restrictions on the amount of time it can run. 3677 * 3678 * To reset the VR thread for an application, a tid of 0 can be passed. 3679 * 3680 * @see android.os.Process#myTid() 3681 * @param tid tid of the VR thread 3682 */ 3683 public static void setVrThread(int tid) { 3684 try { 3685 ActivityManagerNative.getDefault().setVrThread(tid); 3686 } catch (RemoteException e) { 3687 // pass 3688 } 3689 } 3690 3691 /** 3692 * The AppTask allows you to manage your own application's tasks. 3693 * See {@link android.app.ActivityManager#getAppTasks()} 3694 */ 3695 public static class AppTask { 3696 private IAppTask mAppTaskImpl; 3697 3698 /** @hide */ 3699 public AppTask(IAppTask task) { 3700 mAppTaskImpl = task; 3701 } 3702 3703 /** 3704 * Finishes all activities in this task and removes it from the recent tasks list. 3705 */ 3706 public void finishAndRemoveTask() { 3707 try { 3708 mAppTaskImpl.finishAndRemoveTask(); 3709 } catch (RemoteException e) { 3710 throw e.rethrowFromSystemServer(); 3711 } 3712 } 3713 3714 /** 3715 * Get the RecentTaskInfo associated with this task. 3716 * 3717 * @return The RecentTaskInfo for this task, or null if the task no longer exists. 3718 */ 3719 public RecentTaskInfo getTaskInfo() { 3720 try { 3721 return mAppTaskImpl.getTaskInfo(); 3722 } catch (RemoteException e) { 3723 throw e.rethrowFromSystemServer(); 3724 } 3725 } 3726 3727 /** 3728 * Bring this task to the foreground. If it contains activities, they will be 3729 * brought to the foreground with it and their instances re-created if needed. 3730 * If it doesn't contain activities, the root activity of the task will be 3731 * re-launched. 3732 */ 3733 public void moveToFront() { 3734 try { 3735 mAppTaskImpl.moveToFront(); 3736 } catch (RemoteException e) { 3737 throw e.rethrowFromSystemServer(); 3738 } 3739 } 3740 3741 /** 3742 * Start an activity in this task. Brings the task to the foreground. If this task 3743 * is not currently active (that is, its id < 0), then a new activity for the given 3744 * Intent will be launched as the root of the task and the task brought to the 3745 * foreground. Otherwise, if this task is currently active and the Intent does not specify 3746 * an activity to launch in a new task, then a new activity for the given Intent will 3747 * be launched on top of the task and the task brought to the foreground. If this 3748 * task is currently active and the Intent specifies {@link Intent#FLAG_ACTIVITY_NEW_TASK} 3749 * or would otherwise be launched in to a new task, then the activity not launched but 3750 * this task be brought to the foreground and a new intent delivered to the top 3751 * activity if appropriate. 3752 * 3753 * <p>In other words, you generally want to use an Intent here that does not specify 3754 * {@link Intent#FLAG_ACTIVITY_NEW_TASK} or {@link Intent#FLAG_ACTIVITY_NEW_DOCUMENT}, 3755 * and let the system do the right thing.</p> 3756 * 3757 * @param intent The Intent describing the new activity to be launched on the task. 3758 * @param options Optional launch options. 3759 * 3760 * @see Activity#startActivity(android.content.Intent, android.os.Bundle) 3761 */ 3762 public void startActivity(Context context, Intent intent, Bundle options) { 3763 ActivityThread thread = ActivityThread.currentActivityThread(); 3764 thread.getInstrumentation().execStartActivityFromAppTask(context, 3765 thread.getApplicationThread(), mAppTaskImpl, intent, options); 3766 } 3767 3768 /** 3769 * Modify the {@link Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag in the root 3770 * Intent of this AppTask. 3771 * 3772 * @param exclude If true, {@link Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} will 3773 * be set; otherwise, it will be cleared. 3774 */ 3775 public void setExcludeFromRecents(boolean exclude) { 3776 try { 3777 mAppTaskImpl.setExcludeFromRecents(exclude); 3778 } catch (RemoteException e) { 3779 throw e.rethrowFromSystemServer(); 3780 } 3781 } 3782 } 3783} 3784