ActivityManager.java revision a413dc06b2193442a2d956571b829aeb5fb97862
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.R; 20import android.os.BatteryStats; 21import android.os.IBinder; 22import com.android.internal.app.IUsageStats; 23import com.android.internal.os.PkgUsageStats; 24import com.android.internal.os.TransferPipe; 25import com.android.internal.util.FastPrintWriter; 26import com.android.internal.util.MemInfoReader; 27 28import android.content.ComponentName; 29import android.content.Context; 30import android.content.Intent; 31import android.content.pm.ApplicationInfo; 32import android.content.pm.ConfigurationInfo; 33import android.content.pm.IPackageDataObserver; 34import android.content.pm.PackageManager; 35import android.content.pm.UserInfo; 36import android.content.res.Resources; 37import android.graphics.Bitmap; 38import android.graphics.Point; 39import android.graphics.Rect; 40import android.hardware.display.DisplayManagerGlobal; 41import android.os.Bundle; 42import android.os.Debug; 43import android.os.Handler; 44import android.os.Parcel; 45import android.os.Parcelable; 46import android.os.Process; 47import android.os.RemoteException; 48import android.os.ServiceManager; 49import android.os.SystemProperties; 50import android.os.UserHandle; 51import android.text.TextUtils; 52import android.util.DisplayMetrics; 53import android.util.Log; 54import android.util.Slog; 55import android.view.Display; 56 57import java.io.FileDescriptor; 58import java.io.FileOutputStream; 59import java.io.PrintWriter; 60import java.util.HashMap; 61import java.util.List; 62import java.util.Map; 63 64/** 65 * Interact with the overall activities running in the system. 66 */ 67public class ActivityManager { 68 private static String TAG = "ActivityManager"; 69 private static boolean localLOGV = false; 70 71 private final Context mContext; 72 private final Handler mHandler; 73 74 /** 75 * Result for IActivityManager.startActivity: an error where the 76 * start had to be canceled. 77 * @hide 78 */ 79 public static final int START_CANCELED = -6; 80 81 /** 82 * Result for IActivityManager.startActivity: an error where the 83 * thing being started is not an activity. 84 * @hide 85 */ 86 public static final int START_NOT_ACTIVITY = -5; 87 88 /** 89 * Result for IActivityManager.startActivity: an error where the 90 * caller does not have permission to start the activity. 91 * @hide 92 */ 93 public static final int START_PERMISSION_DENIED = -4; 94 95 /** 96 * Result for IActivityManager.startActivity: an error where the 97 * caller has requested both to forward a result and to receive 98 * a result. 99 * @hide 100 */ 101 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 102 103 /** 104 * Result for IActivityManager.startActivity: an error where the 105 * requested class is not found. 106 * @hide 107 */ 108 public static final int START_CLASS_NOT_FOUND = -2; 109 110 /** 111 * Result for IActivityManager.startActivity: an error where the 112 * given Intent could not be resolved to an activity. 113 * @hide 114 */ 115 public static final int START_INTENT_NOT_RESOLVED = -1; 116 117 /** 118 * Result for IActivityManaqer.startActivity: the activity was started 119 * successfully as normal. 120 * @hide 121 */ 122 public static final int START_SUCCESS = 0; 123 124 /** 125 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 126 * be executed if it is the recipient, and that is indeed the case. 127 * @hide 128 */ 129 public static final int START_RETURN_INTENT_TO_CALLER = 1; 130 131 /** 132 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 133 * a task was simply brought to the foreground. 134 * @hide 135 */ 136 public static final int START_TASK_TO_FRONT = 2; 137 138 /** 139 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 140 * the given Intent was given to the existing top activity. 141 * @hide 142 */ 143 public static final int START_DELIVERED_TO_TOP = 3; 144 145 /** 146 * Result for IActivityManaqer.startActivity: request was canceled because 147 * app switches are temporarily canceled to ensure the user's last request 148 * (such as pressing home) is performed. 149 * @hide 150 */ 151 public static final int START_SWITCHES_CANCELED = 4; 152 153 /** 154 * Flag for IActivityManaqer.startActivity: do special start mode where 155 * a new activity is launched only if it is needed. 156 * @hide 157 */ 158 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 159 160 /** 161 * Flag for IActivityManaqer.startActivity: launch the app for 162 * debugging. 163 * @hide 164 */ 165 public static final int START_FLAG_DEBUG = 1<<1; 166 167 /** 168 * Flag for IActivityManaqer.startActivity: launch the app for 169 * OpenGL tracing. 170 * @hide 171 */ 172 public static final int START_FLAG_OPENGL_TRACES = 1<<2; 173 174 /** 175 * Flag for IActivityManaqer.startActivity: if the app is being 176 * launched for profiling, automatically stop the profiler once done. 177 * @hide 178 */ 179 public static final int START_FLAG_AUTO_STOP_PROFILER = 1<<3; 180 181 /** 182 * Result for IActivityManaqer.broadcastIntent: success! 183 * @hide 184 */ 185 public static final int BROADCAST_SUCCESS = 0; 186 187 /** 188 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 189 * a sticky intent without appropriate permission. 190 * @hide 191 */ 192 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 193 194 /** 195 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 196 * for a sendBroadcast operation. 197 * @hide 198 */ 199 public static final int INTENT_SENDER_BROADCAST = 1; 200 201 /** 202 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 203 * for a startActivity operation. 204 * @hide 205 */ 206 public static final int INTENT_SENDER_ACTIVITY = 2; 207 208 /** 209 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 210 * for an activity result operation. 211 * @hide 212 */ 213 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 214 215 /** 216 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 217 * for a startService operation. 218 * @hide 219 */ 220 public static final int INTENT_SENDER_SERVICE = 4; 221 222 /** @hide User operation call: success! */ 223 public static final int USER_OP_SUCCESS = 0; 224 225 /** @hide User operation call: given user id is not known. */ 226 public static final int USER_OP_UNKNOWN_USER = -1; 227 228 /** @hide User operation call: given user id is the current user, can't be stopped. */ 229 public static final int USER_OP_IS_CURRENT = -2; 230 231 /** @hide Process is a persistent system process. */ 232 public static final int PROCESS_STATE_PERSISTENT = 0; 233 234 /** @hide Process is a persistent system process and is doing UI. */ 235 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 236 237 /** @hide Process is hosting the current top activity. */ 238 public static final int PROCESS_STATE_TOP = 2; 239 240 /** @hide Process is important to the user, and something they are aware of. */ 241 public static final int PROCESS_STATE_IMPORTANT_PERCEPTIBLE = 3; 242 243 /** @hide Process is important to the user, but not something they are aware of. */ 244 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 4; 245 246 /** @hide Process is in the background running a receiver. */ 247 public static final int PROCESS_STATE_RECEIVER = 5; 248 249 /** @hide Process is in the background running a backup/restore operation. */ 250 public static final int PROCESS_STATE_BACKUP = 6; 251 252 /** @hide Process is in the background running a service. */ 253 public static final int PROCESS_STATE_SERVICE = 7; 254 255 /** @hide Process is in the background but hosts the home activity. */ 256 public static final int PROCESS_STATE_HOME = 8; 257 258 /** @hide Process is in the background but hosts the last shown activity. */ 259 public static final int PROCESS_STATE_LAST_ACTIVITY = 9; 260 261 /** @hide Process is being cached for later use. */ 262 public static final int PROCESS_STATE_CACHED = 10; 263 264 /*package*/ ActivityManager(Context context, Handler handler) { 265 mContext = context; 266 mHandler = handler; 267 } 268 269 /** 270 * Screen compatibility mode: the application most always run in 271 * compatibility mode. 272 * @hide 273 */ 274 public static final int COMPAT_MODE_ALWAYS = -1; 275 276 /** 277 * Screen compatibility mode: the application can never run in 278 * compatibility mode. 279 * @hide 280 */ 281 public static final int COMPAT_MODE_NEVER = -2; 282 283 /** 284 * Screen compatibility mode: unknown. 285 * @hide 286 */ 287 public static final int COMPAT_MODE_UNKNOWN = -3; 288 289 /** 290 * Screen compatibility mode: the application currently has compatibility 291 * mode disabled. 292 * @hide 293 */ 294 public static final int COMPAT_MODE_DISABLED = 0; 295 296 /** 297 * Screen compatibility mode: the application currently has compatibility 298 * mode enabled. 299 * @hide 300 */ 301 public static final int COMPAT_MODE_ENABLED = 1; 302 303 /** 304 * Screen compatibility mode: request to toggle the application's 305 * compatibility mode. 306 * @hide 307 */ 308 public static final int COMPAT_MODE_TOGGLE = 2; 309 310 /** @hide */ 311 public int getFrontActivityScreenCompatMode() { 312 try { 313 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 314 } catch (RemoteException e) { 315 // System dead, we will be dead too soon! 316 return 0; 317 } 318 } 319 320 /** @hide */ 321 public void setFrontActivityScreenCompatMode(int mode) { 322 try { 323 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 324 } catch (RemoteException e) { 325 // System dead, we will be dead too soon! 326 } 327 } 328 329 /** @hide */ 330 public int getPackageScreenCompatMode(String packageName) { 331 try { 332 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 333 } catch (RemoteException e) { 334 // System dead, we will be dead too soon! 335 return 0; 336 } 337 } 338 339 /** @hide */ 340 public void setPackageScreenCompatMode(String packageName, int mode) { 341 try { 342 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 343 } catch (RemoteException e) { 344 // System dead, we will be dead too soon! 345 } 346 } 347 348 /** @hide */ 349 public boolean getPackageAskScreenCompat(String packageName) { 350 try { 351 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 352 } catch (RemoteException e) { 353 // System dead, we will be dead too soon! 354 return false; 355 } 356 } 357 358 /** @hide */ 359 public void setPackageAskScreenCompat(String packageName, boolean ask) { 360 try { 361 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 362 } catch (RemoteException e) { 363 // System dead, we will be dead too soon! 364 } 365 } 366 367 /** 368 * Return the approximate per-application memory class of the current 369 * device. This gives you an idea of how hard a memory limit you should 370 * impose on your application to let the overall system work best. The 371 * returned value is in megabytes; the baseline Android memory class is 372 * 16 (which happens to be the Java heap limit of those devices); some 373 * device with more memory may return 24 or even higher numbers. 374 */ 375 public int getMemoryClass() { 376 return staticGetMemoryClass(); 377 } 378 379 /** @hide */ 380 static public int staticGetMemoryClass() { 381 // Really brain dead right now -- just take this from the configured 382 // vm heap size, and assume it is in megabytes and thus ends with "m". 383 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 384 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 385 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 386 } 387 return staticGetLargeMemoryClass(); 388 } 389 390 /** 391 * Return the approximate per-application memory class of the current 392 * device when an application is running with a large heap. This is the 393 * space available for memory-intensive applications; most applications 394 * should not need this amount of memory, and should instead stay with the 395 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 396 * This may be the same size as {@link #getMemoryClass()} on memory 397 * constrained devices, or it may be significantly larger on devices with 398 * a large amount of available RAM. 399 * 400 * <p>The is the size of the application's Dalvik heap if it has 401 * specified <code>android:largeHeap="true"</code> in its manifest. 402 */ 403 public int getLargeMemoryClass() { 404 return staticGetLargeMemoryClass(); 405 } 406 407 /** @hide */ 408 static public int staticGetLargeMemoryClass() { 409 // Really brain dead right now -- just take this from the configured 410 // vm heap size, and assume it is in megabytes and thus ends with "m". 411 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 412 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 413 } 414 415 /** 416 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 417 * is ultimately up to the device configuration, but currently it generally means 418 * something in the class of a 512MB device with about a 800x480 or less screen. 419 * This is mostly intended to be used by apps to determine whether they should turn 420 * off certain features that require more RAM. 421 */ 422 public boolean isLowRamDevice() { 423 return isLowRamDeviceStatic(); 424 } 425 426 /** @hide */ 427 public static boolean isLowRamDeviceStatic() { 428 return Resources.getSystem().getBoolean(com.android.internal.R.bool.config_lowRamDevice); 429 } 430 431 /** 432 * Used by persistent processes to determine if they are running on a 433 * higher-end device so should be okay using hardware drawing acceleration 434 * (which tends to consume a lot more RAM). 435 * @hide 436 */ 437 static public boolean isHighEndGfx() { 438 return !isLowRamDeviceStatic() && 439 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 440 } 441 442 /** 443 * Information you can retrieve about tasks that the user has most recently 444 * started or visited. 445 */ 446 public static class RecentTaskInfo implements Parcelable { 447 /** 448 * If this task is currently running, this is the identifier for it. 449 * If it is not running, this will be -1. 450 */ 451 public int id; 452 453 /** 454 * The true identifier of this task, valid even if it is not running. 455 */ 456 public int persistentId; 457 458 /** 459 * The original Intent used to launch the task. You can use this 460 * Intent to re-launch the task (if it is no longer running) or bring 461 * the current task to the front. 462 */ 463 public Intent baseIntent; 464 465 /** 466 * If this task was started from an alias, this is the actual 467 * activity component that was initially started; the component of 468 * the baseIntent in this case is the name of the actual activity 469 * implementation that the alias referred to. Otherwise, this is null. 470 */ 471 public ComponentName origActivity; 472 473 /** 474 * Description of the task's last state. 475 */ 476 public CharSequence description; 477 478 /** 479 * The id of the ActivityStack this Task was on most recently. 480 */ 481 public int stackId; 482 483 public RecentTaskInfo() { 484 } 485 486 @Override 487 public int describeContents() { 488 return 0; 489 } 490 491 @Override 492 public void writeToParcel(Parcel dest, int flags) { 493 dest.writeInt(id); 494 dest.writeInt(persistentId); 495 if (baseIntent != null) { 496 dest.writeInt(1); 497 baseIntent.writeToParcel(dest, 0); 498 } else { 499 dest.writeInt(0); 500 } 501 ComponentName.writeToParcel(origActivity, dest); 502 TextUtils.writeToParcel(description, dest, 503 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 504 dest.writeInt(stackId); 505 } 506 507 public void readFromParcel(Parcel source) { 508 id = source.readInt(); 509 persistentId = source.readInt(); 510 if (source.readInt() != 0) { 511 baseIntent = Intent.CREATOR.createFromParcel(source); 512 } else { 513 baseIntent = null; 514 } 515 origActivity = ComponentName.readFromParcel(source); 516 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 517 stackId = source.readInt(); 518 } 519 520 public static final Creator<RecentTaskInfo> CREATOR 521 = new Creator<RecentTaskInfo>() { 522 public RecentTaskInfo createFromParcel(Parcel source) { 523 return new RecentTaskInfo(source); 524 } 525 public RecentTaskInfo[] newArray(int size) { 526 return new RecentTaskInfo[size]; 527 } 528 }; 529 530 private RecentTaskInfo(Parcel source) { 531 readFromParcel(source); 532 } 533 } 534 535 /** 536 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 537 * that have set their 538 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 539 */ 540 public static final int RECENT_WITH_EXCLUDED = 0x0001; 541 542 /** 543 * Provides a list that does not contain any 544 * recent tasks that currently are not available to the user. 545 */ 546 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 547 548 /** 549 * Return a list of the tasks that the user has recently launched, with 550 * the most recent being first and older ones after in order. 551 * 552 * <p><b>Note: this method is only intended for debugging and presenting 553 * task management user interfaces</b>. This should never be used for 554 * core logic in an application, such as deciding between different 555 * behaviors based on the information found here. Such uses are 556 * <em>not</em> supported, and will likely break in the future. For 557 * example, if multiple applications can be actively running at the 558 * same time, assumptions made about the meaning of the data here for 559 * purposes of control flow will be incorrect.</p> 560 * 561 * @param maxNum The maximum number of entries to return in the list. The 562 * actual number returned may be smaller, depending on how many tasks the 563 * user has started and the maximum number the system can remember. 564 * @param flags Information about what to return. May be any combination 565 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 566 * 567 * @return Returns a list of RecentTaskInfo records describing each of 568 * the recent tasks. 569 * 570 * @throws SecurityException Throws SecurityException if the caller does 571 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 572 */ 573 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 574 throws SecurityException { 575 try { 576 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 577 flags, UserHandle.myUserId()); 578 } catch (RemoteException e) { 579 // System dead, we will be dead too soon! 580 return null; 581 } 582 } 583 584 /** 585 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 586 * specific user. It requires holding 587 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 588 * @param maxNum The maximum number of entries to return in the list. The 589 * actual number returned may be smaller, depending on how many tasks the 590 * user has started and the maximum number the system can remember. 591 * @param flags Information about what to return. May be any combination 592 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 593 * 594 * @return Returns a list of RecentTaskInfo records describing each of 595 * the recent tasks. 596 * 597 * @throws SecurityException Throws SecurityException if the caller does 598 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 599 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 600 * @hide 601 */ 602 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 603 throws SecurityException { 604 try { 605 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 606 flags, userId); 607 } catch (RemoteException e) { 608 // System dead, we will be dead too soon! 609 return null; 610 } 611 } 612 613 /** 614 * Information you can retrieve about a particular task that is currently 615 * "running" in the system. Note that a running task does not mean the 616 * given task actually has a process it is actively running in; it simply 617 * means that the user has gone to it and never closed it, but currently 618 * the system may have killed its process and is only holding on to its 619 * last state in order to restart it when the user returns. 620 */ 621 public static class RunningTaskInfo implements Parcelable { 622 /** 623 * A unique identifier for this task. 624 */ 625 public int id; 626 627 /** 628 * The component launched as the first activity in the task. This can 629 * be considered the "application" of this task. 630 */ 631 public ComponentName baseActivity; 632 633 /** 634 * The activity component at the top of the history stack of the task. 635 * This is what the user is currently doing. 636 */ 637 public ComponentName topActivity; 638 639 /** 640 * Thumbnail representation of the task's current state. Currently 641 * always null. 642 */ 643 public Bitmap thumbnail; 644 645 /** 646 * Description of the task's current state. 647 */ 648 public CharSequence description; 649 650 /** 651 * Number of activities in this task. 652 */ 653 public int numActivities; 654 655 /** 656 * Number of activities that are currently running (not stopped 657 * and persisted) in this task. 658 */ 659 public int numRunning; 660 661 public RunningTaskInfo() { 662 } 663 664 public int describeContents() { 665 return 0; 666 } 667 668 public void writeToParcel(Parcel dest, int flags) { 669 dest.writeInt(id); 670 ComponentName.writeToParcel(baseActivity, dest); 671 ComponentName.writeToParcel(topActivity, dest); 672 if (thumbnail != null) { 673 dest.writeInt(1); 674 thumbnail.writeToParcel(dest, 0); 675 } else { 676 dest.writeInt(0); 677 } 678 TextUtils.writeToParcel(description, dest, 679 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 680 dest.writeInt(numActivities); 681 dest.writeInt(numRunning); 682 } 683 684 public void readFromParcel(Parcel source) { 685 id = source.readInt(); 686 baseActivity = ComponentName.readFromParcel(source); 687 topActivity = ComponentName.readFromParcel(source); 688 if (source.readInt() != 0) { 689 thumbnail = Bitmap.CREATOR.createFromParcel(source); 690 } else { 691 thumbnail = null; 692 } 693 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 694 numActivities = source.readInt(); 695 numRunning = source.readInt(); 696 } 697 698 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 699 public RunningTaskInfo createFromParcel(Parcel source) { 700 return new RunningTaskInfo(source); 701 } 702 public RunningTaskInfo[] newArray(int size) { 703 return new RunningTaskInfo[size]; 704 } 705 }; 706 707 private RunningTaskInfo(Parcel source) { 708 readFromParcel(source); 709 } 710 } 711 712 /** 713 * Return a list of the tasks that are currently running, with 714 * the most recent being first and older ones after in order. Note that 715 * "running" does not mean any of the task's code is currently loaded or 716 * activity -- the task may have been frozen by the system, so that it 717 * can be restarted in its previous state when next brought to the 718 * foreground. 719 * 720 * @param maxNum The maximum number of entries to return in the list. The 721 * actual number returned may be smaller, depending on how many tasks the 722 * user has started. 723 * 724 * @param flags Optional flags 725 * @param receiver Optional receiver for delayed thumbnails 726 * 727 * @return Returns a list of RunningTaskInfo records describing each of 728 * the running tasks. 729 * 730 * Some thumbnails may not be available at the time of this call. The optional 731 * receiver may be used to receive those thumbnails. 732 * 733 * @throws SecurityException Throws SecurityException if the caller does 734 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 735 * 736 * @hide 737 */ 738 public List<RunningTaskInfo> getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver) 739 throws SecurityException { 740 try { 741 return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver); 742 } catch (RemoteException e) { 743 // System dead, we will be dead too soon! 744 return null; 745 } 746 } 747 748 /** 749 * Return a list of the tasks that are currently running, with 750 * the most recent being first and older ones after in order. Note that 751 * "running" does not mean any of the task's code is currently loaded or 752 * activity -- the task may have been frozen by the system, so that it 753 * can be restarted in its previous state when next brought to the 754 * foreground. 755 * 756 * <p><b>Note: this method is only intended for debugging and presenting 757 * task management user interfaces</b>. This should never be used for 758 * core logic in an application, such as deciding between different 759 * behaviors based on the information found here. Such uses are 760 * <em>not</em> supported, and will likely break in the future. For 761 * example, if multiple applications can be actively running at the 762 * same time, assumptions made about the meaning of the data here for 763 * purposes of control flow will be incorrect.</p> 764 * 765 * @param maxNum The maximum number of entries to return in the list. The 766 * actual number returned may be smaller, depending on how many tasks the 767 * user has started. 768 * 769 * @return Returns a list of RunningTaskInfo records describing each of 770 * the running tasks. 771 * 772 * @throws SecurityException Throws SecurityException if the caller does 773 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 774 */ 775 public List<RunningTaskInfo> getRunningTasks(int maxNum) 776 throws SecurityException { 777 return getRunningTasks(maxNum, 0, null); 778 } 779 780 /** 781 * Remove some end of a task's activity stack that is not part of 782 * the main application. The selected activities will be finished, so 783 * they are no longer part of the main task. 784 * 785 * @param taskId The identifier of the task. 786 * @param subTaskIndex The number of the sub-task; this corresponds 787 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 788 * @return Returns true if the sub-task was found and was removed. 789 * 790 * @hide 791 */ 792 public boolean removeSubTask(int taskId, int subTaskIndex) 793 throws SecurityException { 794 try { 795 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 796 } catch (RemoteException e) { 797 // System dead, we will be dead too soon! 798 return false; 799 } 800 } 801 802 /** 803 * If set, the process of the root activity of the task will be killed 804 * as part of removing the task. 805 * @hide 806 */ 807 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 808 809 /** 810 * Completely remove the given task. 811 * 812 * @param taskId Identifier of the task to be removed. 813 * @param flags Additional operational flags. May be 0 or 814 * {@link #REMOVE_TASK_KILL_PROCESS}. 815 * @return Returns true if the given task was found and removed. 816 * 817 * @hide 818 */ 819 public boolean removeTask(int taskId, int flags) 820 throws SecurityException { 821 try { 822 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 823 } catch (RemoteException e) { 824 // System dead, we will be dead too soon! 825 return false; 826 } 827 } 828 829 /** @hide */ 830 public static class TaskThumbnails implements Parcelable { 831 public Bitmap mainThumbnail; 832 833 public int numSubThumbbails; 834 835 /** @hide */ 836 public IThumbnailRetriever retriever; 837 838 public TaskThumbnails() { 839 } 840 841 public Bitmap getSubThumbnail(int index) { 842 try { 843 return retriever.getThumbnail(index); 844 } catch (RemoteException e) { 845 return null; 846 } 847 } 848 849 public int describeContents() { 850 return 0; 851 } 852 853 public void writeToParcel(Parcel dest, int flags) { 854 if (mainThumbnail != null) { 855 dest.writeInt(1); 856 mainThumbnail.writeToParcel(dest, 0); 857 } else { 858 dest.writeInt(0); 859 } 860 dest.writeInt(numSubThumbbails); 861 dest.writeStrongInterface(retriever); 862 } 863 864 public void readFromParcel(Parcel source) { 865 if (source.readInt() != 0) { 866 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 867 } else { 868 mainThumbnail = null; 869 } 870 numSubThumbbails = source.readInt(); 871 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 872 } 873 874 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 875 public TaskThumbnails createFromParcel(Parcel source) { 876 return new TaskThumbnails(source); 877 } 878 public TaskThumbnails[] newArray(int size) { 879 return new TaskThumbnails[size]; 880 } 881 }; 882 883 private TaskThumbnails(Parcel source) { 884 readFromParcel(source); 885 } 886 } 887 888 /** @hide */ 889 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 890 try { 891 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 892 } catch (RemoteException e) { 893 // System dead, we will be dead too soon! 894 return null; 895 } 896 } 897 898 /** @hide */ 899 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 900 try { 901 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 902 } catch (RemoteException e) { 903 // System dead, we will be dead too soon! 904 return null; 905 } 906 } 907 908 /** 909 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 910 * activity along with the task, so it is positioned immediately behind 911 * the task. 912 */ 913 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 914 915 /** 916 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 917 * user-instigated action, so the current activity will not receive a 918 * hint that the user is leaving. 919 */ 920 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 921 922 /** 923 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 924 * with a null options argument. 925 * 926 * @param taskId The identifier of the task to be moved, as found in 927 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 928 * @param flags Additional operational flags, 0 or more of 929 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 930 */ 931 public void moveTaskToFront(int taskId, int flags) { 932 moveTaskToFront(taskId, flags, null); 933 } 934 935 /** 936 * Ask that the task associated with a given task ID be moved to the 937 * front of the stack, so it is now visible to the user. Requires that 938 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 939 * or a SecurityException will be thrown. 940 * 941 * @param taskId The identifier of the task to be moved, as found in 942 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 943 * @param flags Additional operational flags, 0 or more of 944 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 945 * @param options Additional options for the operation, either null or 946 * as per {@link Context#startActivity(Intent, android.os.Bundle) 947 * Context.startActivity(Intent, Bundle)}. 948 */ 949 public void moveTaskToFront(int taskId, int flags, Bundle options) { 950 try { 951 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 952 } catch (RemoteException e) { 953 // System dead, we will be dead too soon! 954 } 955 } 956 957 /** 958 * Information you can retrieve about a particular Service that is 959 * currently running in the system. 960 */ 961 public static class RunningServiceInfo implements Parcelable { 962 /** 963 * The service component. 964 */ 965 public ComponentName service; 966 967 /** 968 * If non-zero, this is the process the service is running in. 969 */ 970 public int pid; 971 972 /** 973 * The UID that owns this service. 974 */ 975 public int uid; 976 977 /** 978 * The name of the process this service runs in. 979 */ 980 public String process; 981 982 /** 983 * Set to true if the service has asked to run as a foreground process. 984 */ 985 public boolean foreground; 986 987 /** 988 * The time when the service was first made active, either by someone 989 * starting or binding to it. This 990 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 991 */ 992 public long activeSince; 993 994 /** 995 * Set to true if this service has been explicitly started. 996 */ 997 public boolean started; 998 999 /** 1000 * Number of clients connected to the service. 1001 */ 1002 public int clientCount; 1003 1004 /** 1005 * Number of times the service's process has crashed while the service 1006 * is running. 1007 */ 1008 public int crashCount; 1009 1010 /** 1011 * The time when there was last activity in the service (either 1012 * explicit requests to start it or clients binding to it). This 1013 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1014 */ 1015 public long lastActivityTime; 1016 1017 /** 1018 * If non-zero, this service is not currently running, but scheduled to 1019 * restart at the given time. 1020 */ 1021 public long restarting; 1022 1023 /** 1024 * Bit for {@link #flags}: set if this service has been 1025 * explicitly started. 1026 */ 1027 public static final int FLAG_STARTED = 1<<0; 1028 1029 /** 1030 * Bit for {@link #flags}: set if the service has asked to 1031 * run as a foreground process. 1032 */ 1033 public static final int FLAG_FOREGROUND = 1<<1; 1034 1035 /** 1036 * Bit for {@link #flags): set if the service is running in a 1037 * core system process. 1038 */ 1039 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1040 1041 /** 1042 * Bit for {@link #flags): set if the service is running in a 1043 * persistent process. 1044 */ 1045 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1046 1047 /** 1048 * Running flags. 1049 */ 1050 public int flags; 1051 1052 /** 1053 * For special services that are bound to by system code, this is 1054 * the package that holds the binding. 1055 */ 1056 public String clientPackage; 1057 1058 /** 1059 * For special services that are bound to by system code, this is 1060 * a string resource providing a user-visible label for who the 1061 * client is. 1062 */ 1063 public int clientLabel; 1064 1065 public RunningServiceInfo() { 1066 } 1067 1068 public int describeContents() { 1069 return 0; 1070 } 1071 1072 public void writeToParcel(Parcel dest, int flags) { 1073 ComponentName.writeToParcel(service, dest); 1074 dest.writeInt(pid); 1075 dest.writeInt(uid); 1076 dest.writeString(process); 1077 dest.writeInt(foreground ? 1 : 0); 1078 dest.writeLong(activeSince); 1079 dest.writeInt(started ? 1 : 0); 1080 dest.writeInt(clientCount); 1081 dest.writeInt(crashCount); 1082 dest.writeLong(lastActivityTime); 1083 dest.writeLong(restarting); 1084 dest.writeInt(this.flags); 1085 dest.writeString(clientPackage); 1086 dest.writeInt(clientLabel); 1087 } 1088 1089 public void readFromParcel(Parcel source) { 1090 service = ComponentName.readFromParcel(source); 1091 pid = source.readInt(); 1092 uid = source.readInt(); 1093 process = source.readString(); 1094 foreground = source.readInt() != 0; 1095 activeSince = source.readLong(); 1096 started = source.readInt() != 0; 1097 clientCount = source.readInt(); 1098 crashCount = source.readInt(); 1099 lastActivityTime = source.readLong(); 1100 restarting = source.readLong(); 1101 flags = source.readInt(); 1102 clientPackage = source.readString(); 1103 clientLabel = source.readInt(); 1104 } 1105 1106 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1107 public RunningServiceInfo createFromParcel(Parcel source) { 1108 return new RunningServiceInfo(source); 1109 } 1110 public RunningServiceInfo[] newArray(int size) { 1111 return new RunningServiceInfo[size]; 1112 } 1113 }; 1114 1115 private RunningServiceInfo(Parcel source) { 1116 readFromParcel(source); 1117 } 1118 } 1119 1120 /** 1121 * Return a list of the services that are currently running. 1122 * 1123 * <p><b>Note: this method is only intended for debugging or implementing 1124 * service management type user interfaces.</b></p> 1125 * 1126 * @param maxNum The maximum number of entries to return in the list. The 1127 * actual number returned may be smaller, depending on how many services 1128 * are running. 1129 * 1130 * @return Returns a list of RunningServiceInfo records describing each of 1131 * the running tasks. 1132 */ 1133 public List<RunningServiceInfo> getRunningServices(int maxNum) 1134 throws SecurityException { 1135 try { 1136 return ActivityManagerNative.getDefault() 1137 .getServices(maxNum, 0); 1138 } catch (RemoteException e) { 1139 // System dead, we will be dead too soon! 1140 return null; 1141 } 1142 } 1143 1144 /** 1145 * Returns a PendingIntent you can start to show a control panel for the 1146 * given running service. If the service does not have a control panel, 1147 * null is returned. 1148 */ 1149 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1150 throws SecurityException { 1151 try { 1152 return ActivityManagerNative.getDefault() 1153 .getRunningServiceControlPanel(service); 1154 } catch (RemoteException e) { 1155 // System dead, we will be dead too soon! 1156 return null; 1157 } 1158 } 1159 1160 /** 1161 * Information you can retrieve about the available memory through 1162 * {@link ActivityManager#getMemoryInfo}. 1163 */ 1164 public static class MemoryInfo implements Parcelable { 1165 /** 1166 * The available memory on the system. This number should not 1167 * be considered absolute: due to the nature of the kernel, a significant 1168 * portion of this memory is actually in use and needed for the overall 1169 * system to run well. 1170 */ 1171 public long availMem; 1172 1173 /** 1174 * The total memory accessible by the kernel. This is basically the 1175 * RAM size of the device, not including below-kernel fixed allocations 1176 * like DMA buffers, RAM for the baseband CPU, etc. 1177 */ 1178 public long totalMem; 1179 1180 /** 1181 * The threshold of {@link #availMem} at which we consider memory to be 1182 * low and start killing background services and other non-extraneous 1183 * processes. 1184 */ 1185 public long threshold; 1186 1187 /** 1188 * Set to true if the system considers itself to currently be in a low 1189 * memory situation. 1190 */ 1191 public boolean lowMemory; 1192 1193 /** @hide */ 1194 public long hiddenAppThreshold; 1195 /** @hide */ 1196 public long secondaryServerThreshold; 1197 /** @hide */ 1198 public long visibleAppThreshold; 1199 /** @hide */ 1200 public long foregroundAppThreshold; 1201 1202 public MemoryInfo() { 1203 } 1204 1205 public int describeContents() { 1206 return 0; 1207 } 1208 1209 public void writeToParcel(Parcel dest, int flags) { 1210 dest.writeLong(availMem); 1211 dest.writeLong(totalMem); 1212 dest.writeLong(threshold); 1213 dest.writeInt(lowMemory ? 1 : 0); 1214 dest.writeLong(hiddenAppThreshold); 1215 dest.writeLong(secondaryServerThreshold); 1216 dest.writeLong(visibleAppThreshold); 1217 dest.writeLong(foregroundAppThreshold); 1218 } 1219 1220 public void readFromParcel(Parcel source) { 1221 availMem = source.readLong(); 1222 totalMem = source.readLong(); 1223 threshold = source.readLong(); 1224 lowMemory = source.readInt() != 0; 1225 hiddenAppThreshold = source.readLong(); 1226 secondaryServerThreshold = source.readLong(); 1227 visibleAppThreshold = source.readLong(); 1228 foregroundAppThreshold = source.readLong(); 1229 } 1230 1231 public static final Creator<MemoryInfo> CREATOR 1232 = new Creator<MemoryInfo>() { 1233 public MemoryInfo createFromParcel(Parcel source) { 1234 return new MemoryInfo(source); 1235 } 1236 public MemoryInfo[] newArray(int size) { 1237 return new MemoryInfo[size]; 1238 } 1239 }; 1240 1241 private MemoryInfo(Parcel source) { 1242 readFromParcel(source); 1243 } 1244 } 1245 1246 /** 1247 * Return general information about the memory state of the system. This 1248 * can be used to help decide how to manage your own memory, though note 1249 * that polling is not recommended and 1250 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1251 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1252 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1253 * level of your process as needed, which gives a better hint for how to 1254 * manage its memory. 1255 */ 1256 public void getMemoryInfo(MemoryInfo outInfo) { 1257 try { 1258 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1259 } catch (RemoteException e) { 1260 } 1261 } 1262 1263 /** 1264 * Information you can retrieve about the WindowManager StackBox hierarchy. 1265 * @hide 1266 */ 1267 public static class StackBoxInfo implements Parcelable { 1268 public int stackBoxId; 1269 public float weight; 1270 public boolean vertical; 1271 public Rect bounds; 1272 public StackBoxInfo[] children; 1273 public int stackId; 1274 public StackInfo stack; 1275 1276 @Override 1277 public int describeContents() { 1278 return 0; 1279 } 1280 1281 @Override 1282 public void writeToParcel(Parcel dest, int flags) { 1283 dest.writeInt(stackBoxId); 1284 dest.writeFloat(weight); 1285 dest.writeInt(vertical ? 1 : 0); 1286 bounds.writeToParcel(dest, flags); 1287 dest.writeInt(stackId); 1288 if (children != null) { 1289 children[0].writeToParcel(dest, flags); 1290 children[1].writeToParcel(dest, flags); 1291 } else { 1292 stack.writeToParcel(dest, flags); 1293 } 1294 } 1295 1296 public void readFromParcel(Parcel source) { 1297 stackBoxId = source.readInt(); 1298 weight = source.readFloat(); 1299 vertical = source.readInt() == 1; 1300 bounds = Rect.CREATOR.createFromParcel(source); 1301 stackId = source.readInt(); 1302 if (stackId == -1) { 1303 children = new StackBoxInfo[2]; 1304 children[0] = StackBoxInfo.CREATOR.createFromParcel(source); 1305 children[1] = StackBoxInfo.CREATOR.createFromParcel(source); 1306 } else { 1307 stack = StackInfo.CREATOR.createFromParcel(source); 1308 } 1309 } 1310 1311 public static final Creator<StackBoxInfo> CREATOR = 1312 new Creator<ActivityManager.StackBoxInfo>() { 1313 1314 @Override 1315 public StackBoxInfo createFromParcel(Parcel source) { 1316 return new StackBoxInfo(source); 1317 } 1318 1319 @Override 1320 public StackBoxInfo[] newArray(int size) { 1321 return new StackBoxInfo[size]; 1322 } 1323 }; 1324 1325 public StackBoxInfo() { 1326 } 1327 1328 public StackBoxInfo(Parcel source) { 1329 readFromParcel(source); 1330 } 1331 1332 public String toString(String prefix) { 1333 StringBuilder sb = new StringBuilder(256); 1334 sb.append(prefix); sb.append("Box id=" + stackBoxId); sb.append(" weight=" + weight); 1335 sb.append(" vertical=" + vertical); sb.append(" bounds=" + bounds.toShortString()); 1336 sb.append("\n"); 1337 if (children != null) { 1338 sb.append(prefix); sb.append("First child=\n"); 1339 sb.append(children[0].toString(prefix + " ")); 1340 sb.append(prefix); sb.append("Second child=\n"); 1341 sb.append(children[1].toString(prefix + " ")); 1342 } else { 1343 sb.append(prefix); sb.append("Stack=\n"); 1344 sb.append(stack.toString(prefix + " ")); 1345 } 1346 return sb.toString(); 1347 } 1348 1349 @Override 1350 public String toString() { 1351 return toString(""); 1352 } 1353 } 1354 1355 /** 1356 * Information you can retrieve about an ActivityStack in the system. 1357 * @hide 1358 */ 1359 public static class StackInfo implements Parcelable { 1360 public int stackId; 1361 public Rect bounds; 1362 public int[] taskIds; 1363 public String[] taskNames; 1364 1365 @Override 1366 public int describeContents() { 1367 return 0; 1368 } 1369 1370 @Override 1371 public void writeToParcel(Parcel dest, int flags) { 1372 dest.writeInt(stackId); 1373 dest.writeInt(bounds.left); 1374 dest.writeInt(bounds.top); 1375 dest.writeInt(bounds.right); 1376 dest.writeInt(bounds.bottom); 1377 dest.writeIntArray(taskIds); 1378 dest.writeStringArray(taskNames); 1379 } 1380 1381 public void readFromParcel(Parcel source) { 1382 stackId = source.readInt(); 1383 bounds = new Rect( 1384 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1385 taskIds = source.createIntArray(); 1386 taskNames = source.createStringArray(); 1387 } 1388 1389 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1390 @Override 1391 public StackInfo createFromParcel(Parcel source) { 1392 return new StackInfo(source); 1393 } 1394 @Override 1395 public StackInfo[] newArray(int size) { 1396 return new StackInfo[size]; 1397 } 1398 }; 1399 1400 public StackInfo() { 1401 } 1402 1403 private StackInfo(Parcel source) { 1404 readFromParcel(source); 1405 } 1406 1407 public String toString(String prefix) { 1408 StringBuilder sb = new StringBuilder(256); 1409 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1410 sb.append(" bounds="); sb.append(bounds.toShortString()); sb.append("\n"); 1411 prefix = prefix + " "; 1412 for (int i = 0; i < taskIds.length; ++i) { 1413 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1414 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1415 } 1416 return sb.toString(); 1417 } 1418 1419 @Override 1420 public String toString() { 1421 return toString(""); 1422 } 1423 } 1424 1425 /** 1426 * @hide 1427 */ 1428 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1429 try { 1430 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1431 observer, UserHandle.myUserId()); 1432 } catch (RemoteException e) { 1433 return false; 1434 } 1435 } 1436 1437 /** 1438 * Permits an application to erase its own data from disk. This is equivalent to 1439 * the user choosing to clear the app's data from within the device settings UI. 1440 * 1441 * @return {@code true} if the application successfully requested that the application's 1442 * data be erased; {@code false} otherwise. 1443 */ 1444 public boolean clearApplicationUserData() { 1445 return clearApplicationUserData(mContext.getPackageName(), null); 1446 } 1447 1448 /** 1449 * Information you can retrieve about any processes that are in an error condition. 1450 */ 1451 public static class ProcessErrorStateInfo implements Parcelable { 1452 /** 1453 * Condition codes 1454 */ 1455 public static final int NO_ERROR = 0; 1456 public static final int CRASHED = 1; 1457 public static final int NOT_RESPONDING = 2; 1458 1459 /** 1460 * The condition that the process is in. 1461 */ 1462 public int condition; 1463 1464 /** 1465 * The process name in which the crash or error occurred. 1466 */ 1467 public String processName; 1468 1469 /** 1470 * The pid of this process; 0 if none 1471 */ 1472 public int pid; 1473 1474 /** 1475 * The kernel user-ID that has been assigned to this process; 1476 * currently this is not a unique ID (multiple applications can have 1477 * the same uid). 1478 */ 1479 public int uid; 1480 1481 /** 1482 * The activity name associated with the error, if known. May be null. 1483 */ 1484 public String tag; 1485 1486 /** 1487 * A short message describing the error condition. 1488 */ 1489 public String shortMsg; 1490 1491 /** 1492 * A long message describing the error condition. 1493 */ 1494 public String longMsg; 1495 1496 /** 1497 * The stack trace where the error originated. May be null. 1498 */ 1499 public String stackTrace; 1500 1501 /** 1502 * to be deprecated: This value will always be null. 1503 */ 1504 public byte[] crashData = null; 1505 1506 public ProcessErrorStateInfo() { 1507 } 1508 1509 @Override 1510 public int describeContents() { 1511 return 0; 1512 } 1513 1514 @Override 1515 public void writeToParcel(Parcel dest, int flags) { 1516 dest.writeInt(condition); 1517 dest.writeString(processName); 1518 dest.writeInt(pid); 1519 dest.writeInt(uid); 1520 dest.writeString(tag); 1521 dest.writeString(shortMsg); 1522 dest.writeString(longMsg); 1523 dest.writeString(stackTrace); 1524 } 1525 1526 public void readFromParcel(Parcel source) { 1527 condition = source.readInt(); 1528 processName = source.readString(); 1529 pid = source.readInt(); 1530 uid = source.readInt(); 1531 tag = source.readString(); 1532 shortMsg = source.readString(); 1533 longMsg = source.readString(); 1534 stackTrace = source.readString(); 1535 } 1536 1537 public static final Creator<ProcessErrorStateInfo> CREATOR = 1538 new Creator<ProcessErrorStateInfo>() { 1539 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1540 return new ProcessErrorStateInfo(source); 1541 } 1542 public ProcessErrorStateInfo[] newArray(int size) { 1543 return new ProcessErrorStateInfo[size]; 1544 } 1545 }; 1546 1547 private ProcessErrorStateInfo(Parcel source) { 1548 readFromParcel(source); 1549 } 1550 } 1551 1552 /** 1553 * Returns a list of any processes that are currently in an error condition. The result 1554 * will be null if all processes are running properly at this time. 1555 * 1556 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1557 * current error conditions (it will not return an empty list). This list ordering is not 1558 * specified. 1559 */ 1560 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1561 try { 1562 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1563 } catch (RemoteException e) { 1564 return null; 1565 } 1566 } 1567 1568 /** 1569 * Information you can retrieve about a running process. 1570 */ 1571 public static class RunningAppProcessInfo implements Parcelable { 1572 /** 1573 * The name of the process that this object is associated with 1574 */ 1575 public String processName; 1576 1577 /** 1578 * The pid of this process; 0 if none 1579 */ 1580 public int pid; 1581 1582 /** 1583 * The user id of this process. 1584 */ 1585 public int uid; 1586 1587 /** 1588 * All packages that have been loaded into the process. 1589 */ 1590 public String pkgList[]; 1591 1592 /** 1593 * Constant for {@link #flags}: this is an app that is unable to 1594 * correctly save its state when going to the background, 1595 * so it can not be killed while in the background. 1596 * @hide 1597 */ 1598 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1599 1600 /** 1601 * Constant for {@link #flags}: this process is associated with a 1602 * persistent system app. 1603 * @hide 1604 */ 1605 public static final int FLAG_PERSISTENT = 1<<1; 1606 1607 /** 1608 * Constant for {@link #flags}: this process is associated with a 1609 * persistent system app. 1610 * @hide 1611 */ 1612 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1613 1614 /** 1615 * Flags of information. May be any of 1616 * {@link #FLAG_CANT_SAVE_STATE}. 1617 * @hide 1618 */ 1619 public int flags; 1620 1621 /** 1622 * Last memory trim level reported to the process: corresponds to 1623 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1624 * ComponentCallbacks2.onTrimMemory(int)}. 1625 */ 1626 public int lastTrimLevel; 1627 1628 /** 1629 * Constant for {@link #importance}: this is a persistent process. 1630 * Only used when reporting to process observers. 1631 * @hide 1632 */ 1633 public static final int IMPORTANCE_PERSISTENT = 50; 1634 1635 /** 1636 * Constant for {@link #importance}: this process is running the 1637 * foreground UI. 1638 */ 1639 public static final int IMPORTANCE_FOREGROUND = 100; 1640 1641 /** 1642 * Constant for {@link #importance}: this process is running something 1643 * that is actively visible to the user, though not in the immediate 1644 * foreground. 1645 */ 1646 public static final int IMPORTANCE_VISIBLE = 200; 1647 1648 /** 1649 * Constant for {@link #importance}: this process is running something 1650 * that is considered to be actively perceptible to the user. An 1651 * example would be an application performing background music playback. 1652 */ 1653 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1654 1655 /** 1656 * Constant for {@link #importance}: this process is running an 1657 * application that can not save its state, and thus can't be killed 1658 * while in the background. 1659 * @hide 1660 */ 1661 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1662 1663 /** 1664 * Constant for {@link #importance}: this process is contains services 1665 * that should remain running. 1666 */ 1667 public static final int IMPORTANCE_SERVICE = 300; 1668 1669 /** 1670 * Constant for {@link #importance}: this process process contains 1671 * background code that is expendable. 1672 */ 1673 public static final int IMPORTANCE_BACKGROUND = 400; 1674 1675 /** 1676 * Constant for {@link #importance}: this process is empty of any 1677 * actively running code. 1678 */ 1679 public static final int IMPORTANCE_EMPTY = 500; 1680 1681 /** 1682 * The relative importance level that the system places on this 1683 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1684 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1685 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1686 * constants are numbered so that "more important" values are always 1687 * smaller than "less important" values. 1688 */ 1689 public int importance; 1690 1691 /** 1692 * An additional ordering within a particular {@link #importance} 1693 * category, providing finer-grained information about the relative 1694 * utility of processes within a category. This number means nothing 1695 * except that a smaller values are more recently used (and thus 1696 * more important). Currently an LRU value is only maintained for 1697 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1698 * be maintained in the future. 1699 */ 1700 public int lru; 1701 1702 /** 1703 * Constant for {@link #importanceReasonCode}: nothing special has 1704 * been specified for the reason for this level. 1705 */ 1706 public static final int REASON_UNKNOWN = 0; 1707 1708 /** 1709 * Constant for {@link #importanceReasonCode}: one of the application's 1710 * content providers is being used by another process. The pid of 1711 * the client process is in {@link #importanceReasonPid} and the 1712 * target provider in this process is in 1713 * {@link #importanceReasonComponent}. 1714 */ 1715 public static final int REASON_PROVIDER_IN_USE = 1; 1716 1717 /** 1718 * Constant for {@link #importanceReasonCode}: one of the application's 1719 * content providers is being used by another process. The pid of 1720 * the client process is in {@link #importanceReasonPid} and the 1721 * target provider in this process is in 1722 * {@link #importanceReasonComponent}. 1723 */ 1724 public static final int REASON_SERVICE_IN_USE = 2; 1725 1726 /** 1727 * The reason for {@link #importance}, if any. 1728 */ 1729 public int importanceReasonCode; 1730 1731 /** 1732 * For the specified values of {@link #importanceReasonCode}, this 1733 * is the process ID of the other process that is a client of this 1734 * process. This will be 0 if no other process is using this one. 1735 */ 1736 public int importanceReasonPid; 1737 1738 /** 1739 * For the specified values of {@link #importanceReasonCode}, this 1740 * is the name of the component that is being used in this process. 1741 */ 1742 public ComponentName importanceReasonComponent; 1743 1744 /** 1745 * When {@link #importanceReasonPid} is non-0, this is the importance 1746 * of the other pid. @hide 1747 */ 1748 public int importanceReasonImportance; 1749 1750 public RunningAppProcessInfo() { 1751 importance = IMPORTANCE_FOREGROUND; 1752 importanceReasonCode = REASON_UNKNOWN; 1753 } 1754 1755 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1756 processName = pProcessName; 1757 pid = pPid; 1758 pkgList = pArr; 1759 } 1760 1761 public int describeContents() { 1762 return 0; 1763 } 1764 1765 public void writeToParcel(Parcel dest, int flags) { 1766 dest.writeString(processName); 1767 dest.writeInt(pid); 1768 dest.writeInt(uid); 1769 dest.writeStringArray(pkgList); 1770 dest.writeInt(this.flags); 1771 dest.writeInt(lastTrimLevel); 1772 dest.writeInt(importance); 1773 dest.writeInt(lru); 1774 dest.writeInt(importanceReasonCode); 1775 dest.writeInt(importanceReasonPid); 1776 ComponentName.writeToParcel(importanceReasonComponent, dest); 1777 dest.writeInt(importanceReasonImportance); 1778 } 1779 1780 public void readFromParcel(Parcel source) { 1781 processName = source.readString(); 1782 pid = source.readInt(); 1783 uid = source.readInt(); 1784 pkgList = source.readStringArray(); 1785 flags = source.readInt(); 1786 lastTrimLevel = source.readInt(); 1787 importance = source.readInt(); 1788 lru = source.readInt(); 1789 importanceReasonCode = source.readInt(); 1790 importanceReasonPid = source.readInt(); 1791 importanceReasonComponent = ComponentName.readFromParcel(source); 1792 importanceReasonImportance = source.readInt(); 1793 } 1794 1795 public static final Creator<RunningAppProcessInfo> CREATOR = 1796 new Creator<RunningAppProcessInfo>() { 1797 public RunningAppProcessInfo createFromParcel(Parcel source) { 1798 return new RunningAppProcessInfo(source); 1799 } 1800 public RunningAppProcessInfo[] newArray(int size) { 1801 return new RunningAppProcessInfo[size]; 1802 } 1803 }; 1804 1805 private RunningAppProcessInfo(Parcel source) { 1806 readFromParcel(source); 1807 } 1808 } 1809 1810 /** 1811 * Returns a list of application processes installed on external media 1812 * that are running on the device. 1813 * 1814 * <p><b>Note: this method is only intended for debugging or building 1815 * a user-facing process management UI.</b></p> 1816 * 1817 * @return Returns a list of ApplicationInfo records, or null if none 1818 * This list ordering is not specified. 1819 * @hide 1820 */ 1821 public List<ApplicationInfo> getRunningExternalApplications() { 1822 try { 1823 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1824 } catch (RemoteException e) { 1825 return null; 1826 } 1827 } 1828 1829 /** 1830 * Returns a list of application processes that are running on the device. 1831 * 1832 * <p><b>Note: this method is only intended for debugging or building 1833 * a user-facing process management UI.</b></p> 1834 * 1835 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1836 * running processes (it will not return an empty list). This list ordering is not 1837 * specified. 1838 */ 1839 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1840 try { 1841 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1842 } catch (RemoteException e) { 1843 return null; 1844 } 1845 } 1846 1847 /** 1848 * Return global memory state information for the calling process. This 1849 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 1850 * only fields that will be filled in are 1851 * {@link RunningAppProcessInfo#pid}, 1852 * {@link RunningAppProcessInfo#uid}, 1853 * {@link RunningAppProcessInfo#lastTrimLevel}, 1854 * {@link RunningAppProcessInfo#importance}, 1855 * {@link RunningAppProcessInfo#lru}, and 1856 * {@link RunningAppProcessInfo#importanceReasonCode}. 1857 */ 1858 static public void getMyMemoryState(RunningAppProcessInfo outState) { 1859 try { 1860 ActivityManagerNative.getDefault().getMyMemoryState(outState); 1861 } catch (RemoteException e) { 1862 } 1863 } 1864 1865 /** 1866 * Return information about the memory usage of one or more processes. 1867 * 1868 * <p><b>Note: this method is only intended for debugging or building 1869 * a user-facing process management UI.</b></p> 1870 * 1871 * @param pids The pids of the processes whose memory usage is to be 1872 * retrieved. 1873 * @return Returns an array of memory information, one for each 1874 * requested pid. 1875 */ 1876 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1877 try { 1878 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1879 } catch (RemoteException e) { 1880 return null; 1881 } 1882 } 1883 1884 /** 1885 * @deprecated This is now just a wrapper for 1886 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1887 * is no longer available to applications because it allows them to 1888 * break other applications by removing their alarms, stopping their 1889 * services, etc. 1890 */ 1891 @Deprecated 1892 public void restartPackage(String packageName) { 1893 killBackgroundProcesses(packageName); 1894 } 1895 1896 /** 1897 * Have the system immediately kill all background processes associated 1898 * with the given package. This is the same as the kernel killing those 1899 * processes to reclaim memory; the system will take care of restarting 1900 * these processes in the future as needed. 1901 * 1902 * <p>You must hold the permission 1903 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1904 * call this method. 1905 * 1906 * @param packageName The name of the package whose processes are to 1907 * be killed. 1908 */ 1909 public void killBackgroundProcesses(String packageName) { 1910 try { 1911 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 1912 UserHandle.myUserId()); 1913 } catch (RemoteException e) { 1914 } 1915 } 1916 1917 /** 1918 * Have the system perform a force stop of everything associated with 1919 * the given application package. All processes that share its uid 1920 * will be killed, all services it has running stopped, all activities 1921 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1922 * broadcast will be sent, so that any of its registered alarms can 1923 * be stopped, notifications removed, etc. 1924 * 1925 * <p>You must hold the permission 1926 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1927 * call this method. 1928 * 1929 * @param packageName The name of the package to be stopped. 1930 * 1931 * @hide This is not available to third party applications due to 1932 * it allowing them to break other applications by stopping their 1933 * services, removing their alarms, etc. 1934 */ 1935 public void forceStopPackage(String packageName) { 1936 try { 1937 ActivityManagerNative.getDefault().forceStopPackage(packageName, 1938 UserHandle.myUserId()); 1939 } catch (RemoteException e) { 1940 } 1941 } 1942 1943 /** 1944 * Get the device configuration attributes. 1945 */ 1946 public ConfigurationInfo getDeviceConfigurationInfo() { 1947 try { 1948 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 1949 } catch (RemoteException e) { 1950 } 1951 return null; 1952 } 1953 1954 /** 1955 * Get the preferred density of icons for the launcher. This is used when 1956 * custom drawables are created (e.g., for shortcuts). 1957 * 1958 * @return density in terms of DPI 1959 */ 1960 public int getLauncherLargeIconDensity() { 1961 final Resources res = mContext.getResources(); 1962 final int density = res.getDisplayMetrics().densityDpi; 1963 final int sw = res.getConfiguration().smallestScreenWidthDp; 1964 1965 if (sw < 600) { 1966 // Smaller than approx 7" tablets, use the regular icon size. 1967 return density; 1968 } 1969 1970 switch (density) { 1971 case DisplayMetrics.DENSITY_LOW: 1972 return DisplayMetrics.DENSITY_MEDIUM; 1973 case DisplayMetrics.DENSITY_MEDIUM: 1974 return DisplayMetrics.DENSITY_HIGH; 1975 case DisplayMetrics.DENSITY_TV: 1976 return DisplayMetrics.DENSITY_XHIGH; 1977 case DisplayMetrics.DENSITY_HIGH: 1978 return DisplayMetrics.DENSITY_XHIGH; 1979 case DisplayMetrics.DENSITY_XHIGH: 1980 return DisplayMetrics.DENSITY_XXHIGH; 1981 case DisplayMetrics.DENSITY_XXHIGH: 1982 return DisplayMetrics.DENSITY_XHIGH * 2; 1983 default: 1984 // The density is some abnormal value. Return some other 1985 // abnormal value that is a reasonable scaling of it. 1986 return (int)((density*1.5f)+.5f); 1987 } 1988 } 1989 1990 /** 1991 * Get the preferred launcher icon size. This is used when custom drawables 1992 * are created (e.g., for shortcuts). 1993 * 1994 * @return dimensions of square icons in terms of pixels 1995 */ 1996 public int getLauncherLargeIconSize() { 1997 final Resources res = mContext.getResources(); 1998 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 1999 final int sw = res.getConfiguration().smallestScreenWidthDp; 2000 2001 if (sw < 600) { 2002 // Smaller than approx 7" tablets, use the regular icon size. 2003 return size; 2004 } 2005 2006 final int density = res.getDisplayMetrics().densityDpi; 2007 2008 switch (density) { 2009 case DisplayMetrics.DENSITY_LOW: 2010 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2011 case DisplayMetrics.DENSITY_MEDIUM: 2012 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2013 case DisplayMetrics.DENSITY_TV: 2014 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2015 case DisplayMetrics.DENSITY_HIGH: 2016 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2017 case DisplayMetrics.DENSITY_XHIGH: 2018 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2019 case DisplayMetrics.DENSITY_XXHIGH: 2020 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2021 default: 2022 // The density is some abnormal value. Return some other 2023 // abnormal value that is a reasonable scaling of it. 2024 return (int)((size*1.5f) + .5f); 2025 } 2026 } 2027 2028 /** 2029 * Returns "true" if the user interface is currently being messed with 2030 * by a monkey. 2031 */ 2032 public static boolean isUserAMonkey() { 2033 try { 2034 return ActivityManagerNative.getDefault().isUserAMonkey(); 2035 } catch (RemoteException e) { 2036 } 2037 return false; 2038 } 2039 2040 /** 2041 * Returns "true" if device is running in a test harness. 2042 */ 2043 public static boolean isRunningInTestHarness() { 2044 return SystemProperties.getBoolean("ro.test_harness", false); 2045 } 2046 2047 /** 2048 * Returns the launch count of each installed package. 2049 * 2050 * @hide 2051 */ 2052 public Map<String, Integer> getAllPackageLaunchCounts() { 2053 try { 2054 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2055 ServiceManager.getService("usagestats")); 2056 if (usageStatsService == null) { 2057 return new HashMap<String, Integer>(); 2058 } 2059 2060 PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats(); 2061 if (allPkgUsageStats == null) { 2062 return new HashMap<String, Integer>(); 2063 } 2064 2065 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2066 for (PkgUsageStats pkgUsageStats : allPkgUsageStats) { 2067 launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount); 2068 } 2069 2070 return launchCounts; 2071 } catch (RemoteException e) { 2072 Log.w(TAG, "Could not query launch counts", e); 2073 return new HashMap<String, Integer>(); 2074 } 2075 } 2076 2077 /** @hide */ 2078 public static int checkComponentPermission(String permission, int uid, 2079 int owningUid, boolean exported) { 2080 // Root, system server get to do everything. 2081 if (uid == 0 || uid == Process.SYSTEM_UID) { 2082 return PackageManager.PERMISSION_GRANTED; 2083 } 2084 // Isolated processes don't get any permissions. 2085 if (UserHandle.isIsolated(uid)) { 2086 return PackageManager.PERMISSION_DENIED; 2087 } 2088 // If there is a uid that owns whatever is being accessed, it has 2089 // blanket access to it regardless of the permissions it requires. 2090 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2091 return PackageManager.PERMISSION_GRANTED; 2092 } 2093 // If the target is not exported, then nobody else can get to it. 2094 if (!exported) { 2095 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid); 2096 return PackageManager.PERMISSION_DENIED; 2097 } 2098 if (permission == null) { 2099 return PackageManager.PERMISSION_GRANTED; 2100 } 2101 try { 2102 return AppGlobals.getPackageManager() 2103 .checkUidPermission(permission, uid); 2104 } catch (RemoteException e) { 2105 // Should never happen, but if it does... deny! 2106 Slog.e(TAG, "PackageManager is dead?!?", e); 2107 } 2108 return PackageManager.PERMISSION_DENIED; 2109 } 2110 2111 /** @hide */ 2112 public static int checkUidPermission(String permission, int uid) { 2113 try { 2114 return AppGlobals.getPackageManager() 2115 .checkUidPermission(permission, uid); 2116 } catch (RemoteException e) { 2117 // Should never happen, but if it does... deny! 2118 Slog.e(TAG, "PackageManager is dead?!?", e); 2119 } 2120 return PackageManager.PERMISSION_DENIED; 2121 } 2122 2123 /** 2124 * @hide 2125 * Helper for dealing with incoming user arguments to system service calls. 2126 * Takes care of checking permissions and converting USER_CURRENT to the 2127 * actual current user. 2128 * 2129 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2130 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2131 * @param userId The user id argument supplied by the caller -- this is the user 2132 * they want to run as. 2133 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2134 * to get a USER_ALL returned and deal with it correctly. If false, 2135 * an exception will be thrown if USER_ALL is supplied. 2136 * @param requireFull If true, the caller must hold 2137 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2138 * different user than their current process; otherwise they must hold 2139 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2140 * @param name Optional textual name of the incoming call; only for generating error messages. 2141 * @param callerPackage Optional package name of caller; only for error messages. 2142 * 2143 * @return Returns the user ID that the call should run as. Will always be a concrete 2144 * user number, unless <var>allowAll</var> is true in which case it could also be 2145 * USER_ALL. 2146 */ 2147 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2148 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2149 if (UserHandle.getUserId(callingUid) == userId) { 2150 return userId; 2151 } 2152 try { 2153 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2154 callingUid, userId, allowAll, requireFull, name, callerPackage); 2155 } catch (RemoteException e) { 2156 throw new SecurityException("Failed calling activity manager", e); 2157 } 2158 } 2159 2160 /** @hide */ 2161 public static int getCurrentUser() { 2162 UserInfo ui; 2163 try { 2164 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2165 return ui != null ? ui.id : 0; 2166 } catch (RemoteException e) { 2167 return 0; 2168 } 2169 } 2170 2171 /** 2172 * Returns the usage statistics of each installed package. 2173 * 2174 * @hide 2175 */ 2176 public PkgUsageStats[] getAllPackageUsageStats() { 2177 try { 2178 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2179 ServiceManager.getService("usagestats")); 2180 if (usageStatsService != null) { 2181 return usageStatsService.getAllPkgUsageStats(); 2182 } 2183 } catch (RemoteException e) { 2184 Log.w(TAG, "Could not query usage stats", e); 2185 } 2186 return new PkgUsageStats[0]; 2187 } 2188 2189 /** 2190 * @param userid the user's id. Zero indicates the default user 2191 * @hide 2192 */ 2193 public boolean switchUser(int userid) { 2194 try { 2195 return ActivityManagerNative.getDefault().switchUser(userid); 2196 } catch (RemoteException e) { 2197 return false; 2198 } 2199 } 2200 2201 /** 2202 * Return whether the given user is actively running. This means that 2203 * the user is in the "started" state, not "stopped" -- it is currently 2204 * allowed to run code through scheduled alarms, receiving broadcasts, 2205 * etc. A started user may be either the current foreground user or a 2206 * background user; the result here does not distinguish between the two. 2207 * @param userid the user's id. Zero indicates the default user. 2208 * @hide 2209 */ 2210 public boolean isUserRunning(int userid) { 2211 try { 2212 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2213 } catch (RemoteException e) { 2214 return false; 2215 } 2216 } 2217 2218 /** 2219 * Perform a system dump of various state associated with the given application 2220 * package name. This call blocks while the dump is being performed, so should 2221 * not be done on a UI thread. The data will be written to the given file 2222 * descriptor as text. An application must hold the 2223 * {@link android.Manifest.permission#DUMP} permission to make this call. 2224 * @param fd The file descriptor that the dump should be written to. 2225 * @param packageName The name of the package that is to be dumped. 2226 */ 2227 public void dumpPackageState(FileDescriptor fd, String packageName) { 2228 dumpPackageStateStatic(fd, packageName); 2229 } 2230 2231 /** 2232 * @hide 2233 */ 2234 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2235 FileOutputStream fout = new FileOutputStream(fd); 2236 PrintWriter pw = new FastPrintWriter(fout); 2237 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { "package", packageName }); 2238 pw.println(); 2239 dumpService(pw, fd, "procstats", new String[] { packageName }); 2240 pw.println(); 2241 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2242 pw.println(); 2243 dumpService(pw, fd, "package", new String[] { packageName }); 2244 pw.println(); 2245 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2246 pw.flush(); 2247 } 2248 2249 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2250 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2251 IBinder service = ServiceManager.checkService(name); 2252 if (service == null) { 2253 pw.println(" (Service not found)"); 2254 return; 2255 } 2256 TransferPipe tp = null; 2257 try { 2258 pw.flush(); 2259 tp = new TransferPipe(); 2260 tp.setBufferPrefix(" "); 2261 service.dump(tp.getWriteFd().getFileDescriptor(), args); 2262 tp.go(fd); 2263 } catch (Throwable e) { 2264 if (tp != null) { 2265 tp.kill(); 2266 } 2267 pw.println("Failure dumping service:"); 2268 e.printStackTrace(pw); 2269 } 2270 } 2271} 2272