ActivityManager.java revision 35fc6a02aeded9578375af5828e14043164028d5
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.os.BatteryStats; 20import android.os.IBinder; 21import com.android.internal.app.IUsageStats; 22import com.android.internal.app.ProcessStats; 23import com.android.internal.os.PkgUsageStats; 24import com.android.internal.os.TransferPipe; 25import com.android.internal.util.FastPrintWriter; 26 27import android.content.ComponentName; 28import android.content.Context; 29import android.content.Intent; 30import android.content.pm.ApplicationInfo; 31import android.content.pm.ConfigurationInfo; 32import android.content.pm.IPackageDataObserver; 33import android.content.pm.PackageManager; 34import android.content.pm.UserInfo; 35import android.content.res.Resources; 36import android.graphics.Bitmap; 37import android.graphics.Rect; 38import android.os.Bundle; 39import android.os.Debug; 40import android.os.Handler; 41import android.os.Parcel; 42import android.os.Parcelable; 43import android.os.Process; 44import android.os.RemoteException; 45import android.os.ServiceManager; 46import android.os.SystemProperties; 47import android.os.UserHandle; 48import android.text.TextUtils; 49import android.util.DisplayMetrics; 50import android.util.Log; 51import android.util.Slog; 52 53import java.io.FileDescriptor; 54import java.io.FileOutputStream; 55import java.io.PrintWriter; 56import java.util.HashMap; 57import java.util.List; 58import java.util.Map; 59 60/** 61 * Interact with the overall activities running in the system. 62 */ 63public class ActivityManager { 64 private static String TAG = "ActivityManager"; 65 private static boolean localLOGV = false; 66 67 private final Context mContext; 68 private final Handler mHandler; 69 70 /** 71 * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code 72 * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be 73 * uninstalled in lieu of the declaring one. The package named here must be 74 * signed with the same certificate as the one declaring the {@code <meta-data>}. 75 */ 76 public static final String META_HOME_ALTERNATE = "android.app.home.alternate"; 77 78 /** 79 * Result for IActivityManager.startActivity: an error where the 80 * start had to be canceled. 81 * @hide 82 */ 83 public static final int START_CANCELED = -6; 84 85 /** 86 * Result for IActivityManager.startActivity: an error where the 87 * thing being started is not an activity. 88 * @hide 89 */ 90 public static final int START_NOT_ACTIVITY = -5; 91 92 /** 93 * Result for IActivityManager.startActivity: an error where the 94 * caller does not have permission to start the activity. 95 * @hide 96 */ 97 public static final int START_PERMISSION_DENIED = -4; 98 99 /** 100 * Result for IActivityManager.startActivity: an error where the 101 * caller has requested both to forward a result and to receive 102 * a result. 103 * @hide 104 */ 105 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 106 107 /** 108 * Result for IActivityManager.startActivity: an error where the 109 * requested class is not found. 110 * @hide 111 */ 112 public static final int START_CLASS_NOT_FOUND = -2; 113 114 /** 115 * Result for IActivityManager.startActivity: an error where the 116 * given Intent could not be resolved to an activity. 117 * @hide 118 */ 119 public static final int START_INTENT_NOT_RESOLVED = -1; 120 121 /** 122 * Result for IActivityManaqer.startActivity: the activity was started 123 * successfully as normal. 124 * @hide 125 */ 126 public static final int START_SUCCESS = 0; 127 128 /** 129 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 130 * be executed if it is the recipient, and that is indeed the case. 131 * @hide 132 */ 133 public static final int START_RETURN_INTENT_TO_CALLER = 1; 134 135 /** 136 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 137 * a task was simply brought to the foreground. 138 * @hide 139 */ 140 public static final int START_TASK_TO_FRONT = 2; 141 142 /** 143 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 144 * the given Intent was given to the existing top activity. 145 * @hide 146 */ 147 public static final int START_DELIVERED_TO_TOP = 3; 148 149 /** 150 * Result for IActivityManaqer.startActivity: request was canceled because 151 * app switches are temporarily canceled to ensure the user's last request 152 * (such as pressing home) is performed. 153 * @hide 154 */ 155 public static final int START_SWITCHES_CANCELED = 4; 156 157 /** 158 * Result for IActivityManaqer.startActivity: a new activity was attempted to be started 159 * while in Lock Task Mode. 160 * @hide 161 */ 162 public static final int START_RETURN_LOCK_TASK_MODE_VIOLATION = 5; 163 164 /** 165 * Flag for IActivityManaqer.startActivity: do special start mode where 166 * a new activity is launched only if it is needed. 167 * @hide 168 */ 169 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 170 171 /** 172 * Flag for IActivityManaqer.startActivity: launch the app for 173 * debugging. 174 * @hide 175 */ 176 public static final int START_FLAG_DEBUG = 1<<1; 177 178 /** 179 * Flag for IActivityManaqer.startActivity: launch the app for 180 * OpenGL tracing. 181 * @hide 182 */ 183 public static final int START_FLAG_OPENGL_TRACES = 1<<2; 184 185 /** 186 * Flag for IActivityManaqer.startActivity: if the app is being 187 * launched for profiling, automatically stop the profiler once done. 188 * @hide 189 */ 190 public static final int START_FLAG_AUTO_STOP_PROFILER = 1<<3; 191 192 /** 193 * Result for IActivityManaqer.broadcastIntent: success! 194 * @hide 195 */ 196 public static final int BROADCAST_SUCCESS = 0; 197 198 /** 199 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 200 * a sticky intent without appropriate permission. 201 * @hide 202 */ 203 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 204 205 /** 206 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 207 * for a sendBroadcast operation. 208 * @hide 209 */ 210 public static final int INTENT_SENDER_BROADCAST = 1; 211 212 /** 213 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 214 * for a startActivity operation. 215 * @hide 216 */ 217 public static final int INTENT_SENDER_ACTIVITY = 2; 218 219 /** 220 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 221 * for an activity result operation. 222 * @hide 223 */ 224 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 225 226 /** 227 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 228 * for a startService operation. 229 * @hide 230 */ 231 public static final int INTENT_SENDER_SERVICE = 4; 232 233 /** @hide User operation call: success! */ 234 public static final int USER_OP_SUCCESS = 0; 235 236 /** @hide User operation call: given user id is not known. */ 237 public static final int USER_OP_UNKNOWN_USER = -1; 238 239 /** @hide User operation call: given user id is the current user, can't be stopped. */ 240 public static final int USER_OP_IS_CURRENT = -2; 241 242 /** @hide Process is a persistent system process. */ 243 public static final int PROCESS_STATE_PERSISTENT = 0; 244 245 /** @hide Process is a persistent system process and is doing UI. */ 246 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 247 248 /** @hide Process is hosting the current top activities. Note that this covers 249 * all activities that are visible to the user. */ 250 public static final int PROCESS_STATE_TOP = 2; 251 252 /** @hide Process is important to the user, and something they are aware of. */ 253 public static final int PROCESS_STATE_IMPORTANT_FOREGROUND = 3; 254 255 /** @hide Process is important to the user, but not something they are aware of. */ 256 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 4; 257 258 /** @hide Process is in the background running a backup/restore operation. */ 259 public static final int PROCESS_STATE_BACKUP = 5; 260 261 /** @hide Process is in the background, but it can't restore its state so we want 262 * to try to avoid killing it. */ 263 public static final int PROCESS_STATE_HEAVY_WEIGHT = 6; 264 265 /** @hide Process is in the background running a service. Unlike oom_adj, this level 266 * is used for both the normal running in background state and the executing 267 * operations state. */ 268 public static final int PROCESS_STATE_SERVICE = 7; 269 270 /** @hide Process is in the background running a receiver. Note that from the 271 * perspective of oom_adj receivers run at a higher foreground level, but for our 272 * prioritization here that is not necessary and putting them below services means 273 * many fewer changes in some process states as they receive broadcasts. */ 274 public static final int PROCESS_STATE_RECEIVER = 8; 275 276 /** @hide Process is in the background but hosts the home activity. */ 277 public static final int PROCESS_STATE_HOME = 9; 278 279 /** @hide Process is in the background but hosts the last shown activity. */ 280 public static final int PROCESS_STATE_LAST_ACTIVITY = 10; 281 282 /** @hide Process is being cached for later use and contains activities. */ 283 public static final int PROCESS_STATE_CACHED_ACTIVITY = 11; 284 285 /** @hide Process is being cached for later use and is a client of another cached 286 * process that contains activities. */ 287 public static final int PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 12; 288 289 /** @hide Process is being cached for later use and is empty. */ 290 public static final int PROCESS_STATE_CACHED_EMPTY = 13; 291 292 /*package*/ ActivityManager(Context context, Handler handler) { 293 mContext = context; 294 mHandler = handler; 295 } 296 297 /** 298 * Screen compatibility mode: the application most always run in 299 * compatibility mode. 300 * @hide 301 */ 302 public static final int COMPAT_MODE_ALWAYS = -1; 303 304 /** 305 * Screen compatibility mode: the application can never run in 306 * compatibility mode. 307 * @hide 308 */ 309 public static final int COMPAT_MODE_NEVER = -2; 310 311 /** 312 * Screen compatibility mode: unknown. 313 * @hide 314 */ 315 public static final int COMPAT_MODE_UNKNOWN = -3; 316 317 /** 318 * Screen compatibility mode: the application currently has compatibility 319 * mode disabled. 320 * @hide 321 */ 322 public static final int COMPAT_MODE_DISABLED = 0; 323 324 /** 325 * Screen compatibility mode: the application currently has compatibility 326 * mode enabled. 327 * @hide 328 */ 329 public static final int COMPAT_MODE_ENABLED = 1; 330 331 /** 332 * Screen compatibility mode: request to toggle the application's 333 * compatibility mode. 334 * @hide 335 */ 336 public static final int COMPAT_MODE_TOGGLE = 2; 337 338 /** @hide */ 339 public int getFrontActivityScreenCompatMode() { 340 try { 341 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 342 } catch (RemoteException e) { 343 // System dead, we will be dead too soon! 344 return 0; 345 } 346 } 347 348 /** @hide */ 349 public void setFrontActivityScreenCompatMode(int mode) { 350 try { 351 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 352 } catch (RemoteException e) { 353 // System dead, we will be dead too soon! 354 } 355 } 356 357 /** @hide */ 358 public int getPackageScreenCompatMode(String packageName) { 359 try { 360 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 361 } catch (RemoteException e) { 362 // System dead, we will be dead too soon! 363 return 0; 364 } 365 } 366 367 /** @hide */ 368 public void setPackageScreenCompatMode(String packageName, int mode) { 369 try { 370 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 371 } catch (RemoteException e) { 372 // System dead, we will be dead too soon! 373 } 374 } 375 376 /** @hide */ 377 public boolean getPackageAskScreenCompat(String packageName) { 378 try { 379 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 380 } catch (RemoteException e) { 381 // System dead, we will be dead too soon! 382 return false; 383 } 384 } 385 386 /** @hide */ 387 public void setPackageAskScreenCompat(String packageName, boolean ask) { 388 try { 389 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 390 } catch (RemoteException e) { 391 // System dead, we will be dead too soon! 392 } 393 } 394 395 /** 396 * Return the approximate per-application memory class of the current 397 * device. This gives you an idea of how hard a memory limit you should 398 * impose on your application to let the overall system work best. The 399 * returned value is in megabytes; the baseline Android memory class is 400 * 16 (which happens to be the Java heap limit of those devices); some 401 * device with more memory may return 24 or even higher numbers. 402 */ 403 public int getMemoryClass() { 404 return staticGetMemoryClass(); 405 } 406 407 /** @hide */ 408 static public int staticGetMemoryClass() { 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.heapgrowthlimit", ""); 412 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 413 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 414 } 415 return staticGetLargeMemoryClass(); 416 } 417 418 /** 419 * Return the approximate per-application memory class of the current 420 * device when an application is running with a large heap. This is the 421 * space available for memory-intensive applications; most applications 422 * should not need this amount of memory, and should instead stay with the 423 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 424 * This may be the same size as {@link #getMemoryClass()} on memory 425 * constrained devices, or it may be significantly larger on devices with 426 * a large amount of available RAM. 427 * 428 * <p>The is the size of the application's Dalvik heap if it has 429 * specified <code>android:largeHeap="true"</code> in its manifest. 430 */ 431 public int getLargeMemoryClass() { 432 return staticGetLargeMemoryClass(); 433 } 434 435 /** @hide */ 436 static public int staticGetLargeMemoryClass() { 437 // Really brain dead right now -- just take this from the configured 438 // vm heap size, and assume it is in megabytes and thus ends with "m". 439 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 440 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 441 } 442 443 /** 444 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 445 * is ultimately up to the device configuration, but currently it generally means 446 * something in the class of a 512MB device with about a 800x480 or less screen. 447 * This is mostly intended to be used by apps to determine whether they should turn 448 * off certain features that require more RAM. 449 */ 450 public boolean isLowRamDevice() { 451 return isLowRamDeviceStatic(); 452 } 453 454 /** @hide */ 455 public static boolean isLowRamDeviceStatic() { 456 return "true".equals(SystemProperties.get("ro.config.low_ram", "false")); 457 } 458 459 /** 460 * Used by persistent processes to determine if they are running on a 461 * higher-end device so should be okay using hardware drawing acceleration 462 * (which tends to consume a lot more RAM). 463 * @hide 464 */ 465 static public boolean isHighEndGfx() { 466 return !isLowRamDeviceStatic() && 467 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 468 } 469 470 /** 471 * Information you can retrieve about tasks that the user has most recently 472 * started or visited. 473 */ 474 public static class RecentTaskInfo implements Parcelable { 475 /** 476 * If this task is currently running, this is the identifier for it. 477 * If it is not running, this will be -1. 478 */ 479 public int id; 480 481 /** 482 * The true identifier of this task, valid even if it is not running. 483 */ 484 public int persistentId; 485 486 /** 487 * The original Intent used to launch the task. You can use this 488 * Intent to re-launch the task (if it is no longer running) or bring 489 * the current task to the front. 490 */ 491 public Intent baseIntent; 492 493 /** 494 * If this task was started from an alias, this is the actual 495 * activity component that was initially started; the component of 496 * the baseIntent in this case is the name of the actual activity 497 * implementation that the alias referred to. Otherwise, this is null. 498 */ 499 public ComponentName origActivity; 500 501 /** 502 * Description of the task's last state. 503 */ 504 public CharSequence description; 505 506 /** 507 * The id of the ActivityStack this Task was on most recently. 508 * @hide 509 */ 510 public int stackId; 511 512 /** 513 * The id of the user the task was running as. 514 * @hide 515 */ 516 public int userId; 517 518 /** 519 * The label of the highest activity in the task stack to have set a label using 520 * {@link Activity#setActivityLabelAndIcon(CharSequence, android.graphics.Bitmap)}. 521 */ 522 public CharSequence activityLabel; 523 524 /** 525 * The Bitmap icon of the highest activity in the task stack to set a Bitmap using 526 * {@link Activity#setActivityLabelAndIcon(CharSequence, android.graphics.Bitmap)}. 527 */ 528 public Bitmap activityIcon; 529 530 public RecentTaskInfo() { 531 } 532 533 @Override 534 public int describeContents() { 535 return 0; 536 } 537 538 @Override 539 public void writeToParcel(Parcel dest, int flags) { 540 dest.writeInt(id); 541 dest.writeInt(persistentId); 542 if (baseIntent != null) { 543 dest.writeInt(1); 544 baseIntent.writeToParcel(dest, 0); 545 } else { 546 dest.writeInt(0); 547 } 548 ComponentName.writeToParcel(origActivity, dest); 549 TextUtils.writeToParcel(description, dest, 550 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 551 TextUtils.writeToParcel(activityLabel, dest, 552 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 553 if (activityIcon == null) { 554 dest.writeInt(0); 555 } else { 556 dest.writeInt(1); 557 activityIcon.writeToParcel(dest, 0); 558 } 559 dest.writeInt(stackId); 560 dest.writeInt(userId); 561 } 562 563 public void readFromParcel(Parcel source) { 564 id = source.readInt(); 565 persistentId = source.readInt(); 566 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 567 origActivity = ComponentName.readFromParcel(source); 568 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 569 activityLabel = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 570 activityIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 571 stackId = source.readInt(); 572 userId = source.readInt(); 573 } 574 575 public static final Creator<RecentTaskInfo> CREATOR 576 = new Creator<RecentTaskInfo>() { 577 public RecentTaskInfo createFromParcel(Parcel source) { 578 return new RecentTaskInfo(source); 579 } 580 public RecentTaskInfo[] newArray(int size) { 581 return new RecentTaskInfo[size]; 582 } 583 }; 584 585 private RecentTaskInfo(Parcel source) { 586 readFromParcel(source); 587 } 588 } 589 590 /** 591 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 592 * that have set their 593 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 594 */ 595 public static final int RECENT_WITH_EXCLUDED = 0x0001; 596 597 /** 598 * Provides a list that does not contain any 599 * recent tasks that currently are not available to the user. 600 */ 601 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 602 603 /** 604 * Provides a list that contains recent tasks for all 605 * profiles of a user. 606 * @hide 607 */ 608 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 609 610 /** 611 * Return a list of the tasks that the user has recently launched, with 612 * the most recent being first and older ones after in order. 613 * 614 * <p><b>Note: this method is only intended for debugging and presenting 615 * task management user interfaces</b>. This should never be used for 616 * core logic in an application, such as deciding between different 617 * behaviors based on the information found here. Such uses are 618 * <em>not</em> supported, and will likely break in the future. For 619 * example, if multiple applications can be actively running at the 620 * same time, assumptions made about the meaning of the data here for 621 * purposes of control flow will be incorrect.</p> 622 * 623 * @param maxNum The maximum number of entries to return in the list. The 624 * actual number returned may be smaller, depending on how many tasks the 625 * user has started and the maximum number the system can remember. 626 * @param flags Information about what to return. May be any combination 627 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 628 * 629 * @return Returns a list of RecentTaskInfo records describing each of 630 * the recent tasks. 631 * 632 * @throws SecurityException Throws SecurityException if the caller does 633 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 634 */ 635 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 636 throws SecurityException { 637 try { 638 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 639 flags, UserHandle.myUserId()); 640 } catch (RemoteException e) { 641 // System dead, we will be dead too soon! 642 return null; 643 } 644 } 645 646 /** 647 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 648 * specific user. It requires holding 649 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 650 * @param maxNum The maximum number of entries to return in the list. The 651 * actual number returned may be smaller, depending on how many tasks the 652 * user has started and the maximum number the system can remember. 653 * @param flags Information about what to return. May be any combination 654 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 655 * 656 * @return Returns a list of RecentTaskInfo records describing each of 657 * the recent tasks. 658 * 659 * @throws SecurityException Throws SecurityException if the caller does 660 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 661 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 662 * @hide 663 */ 664 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 665 throws SecurityException { 666 try { 667 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 668 flags, userId); 669 } catch (RemoteException e) { 670 // System dead, we will be dead too soon! 671 return null; 672 } 673 } 674 675 /** 676 * Information you can retrieve about a particular task that is currently 677 * "running" in the system. Note that a running task does not mean the 678 * given task actually has a process it is actively running in; it simply 679 * means that the user has gone to it and never closed it, but currently 680 * the system may have killed its process and is only holding on to its 681 * last state in order to restart it when the user returns. 682 */ 683 public static class RunningTaskInfo implements Parcelable { 684 /** 685 * A unique identifier for this task. 686 */ 687 public int id; 688 689 /** 690 * The component launched as the first activity in the task. This can 691 * be considered the "application" of this task. 692 */ 693 public ComponentName baseActivity; 694 695 /** 696 * The activity component at the top of the history stack of the task. 697 * This is what the user is currently doing. 698 */ 699 public ComponentName topActivity; 700 701 /** 702 * Thumbnail representation of the task's current state. Currently 703 * always null. 704 */ 705 public Bitmap thumbnail; 706 707 /** 708 * Description of the task's current state. 709 */ 710 public CharSequence description; 711 712 /** 713 * Number of activities in this task. 714 */ 715 public int numActivities; 716 717 /** 718 * Number of activities that are currently running (not stopped 719 * and persisted) in this task. 720 */ 721 public int numRunning; 722 723 /** 724 * Last time task was run. For sorting. 725 * @hide 726 */ 727 public long lastActiveTime; 728 729 public RunningTaskInfo() { 730 } 731 732 public int describeContents() { 733 return 0; 734 } 735 736 public void writeToParcel(Parcel dest, int flags) { 737 dest.writeInt(id); 738 ComponentName.writeToParcel(baseActivity, dest); 739 ComponentName.writeToParcel(topActivity, dest); 740 if (thumbnail != null) { 741 dest.writeInt(1); 742 thumbnail.writeToParcel(dest, 0); 743 } else { 744 dest.writeInt(0); 745 } 746 TextUtils.writeToParcel(description, dest, 747 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 748 dest.writeInt(numActivities); 749 dest.writeInt(numRunning); 750 } 751 752 public void readFromParcel(Parcel source) { 753 id = source.readInt(); 754 baseActivity = ComponentName.readFromParcel(source); 755 topActivity = ComponentName.readFromParcel(source); 756 if (source.readInt() != 0) { 757 thumbnail = Bitmap.CREATOR.createFromParcel(source); 758 } else { 759 thumbnail = null; 760 } 761 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 762 numActivities = source.readInt(); 763 numRunning = source.readInt(); 764 } 765 766 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 767 public RunningTaskInfo createFromParcel(Parcel source) { 768 return new RunningTaskInfo(source); 769 } 770 public RunningTaskInfo[] newArray(int size) { 771 return new RunningTaskInfo[size]; 772 } 773 }; 774 775 private RunningTaskInfo(Parcel source) { 776 readFromParcel(source); 777 } 778 } 779 780 /** 781 * Return a list of the tasks that are currently running, with 782 * the most recent being first and older ones after in order. Note that 783 * "running" does not mean any of the task's code is currently loaded or 784 * activity -- the task may have been frozen by the system, so that it 785 * can be restarted in its previous state when next brought to the 786 * foreground. 787 * 788 * @param maxNum The maximum number of entries to return in the list. The 789 * actual number returned may be smaller, depending on how many tasks the 790 * user has started. 791 * 792 * @param flags Optional flags 793 * @param receiver Optional receiver for delayed thumbnails 794 * 795 * @return Returns a list of RunningTaskInfo records describing each of 796 * the running tasks. 797 * 798 * Some thumbnails may not be available at the time of this call. The optional 799 * receiver may be used to receive those thumbnails. 800 * 801 * @throws SecurityException Throws SecurityException if the caller does 802 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 803 * 804 * @hide 805 */ 806 public List<RunningTaskInfo> getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver) 807 throws SecurityException { 808 try { 809 return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver); 810 } catch (RemoteException e) { 811 // System dead, we will be dead too soon! 812 return null; 813 } 814 } 815 816 /** 817 * Return a list of the tasks that are currently running, with 818 * the most recent being first and older ones after in order. Note that 819 * "running" does not mean any of the task's code is currently loaded or 820 * activity -- the task may have been frozen by the system, so that it 821 * can be restarted in its previous state when next brought to the 822 * foreground. 823 * 824 * <p><b>Note: this method is only intended for debugging and presenting 825 * task management user interfaces</b>. This should never be used for 826 * core logic in an application, such as deciding between different 827 * behaviors based on the information found here. Such uses are 828 * <em>not</em> supported, and will likely break in the future. For 829 * example, if multiple applications can be actively running at the 830 * same time, assumptions made about the meaning of the data here for 831 * purposes of control flow will be incorrect.</p> 832 * 833 * @param maxNum The maximum number of entries to return in the list. The 834 * actual number returned may be smaller, depending on how many tasks the 835 * user has started. 836 * 837 * @return Returns a list of RunningTaskInfo records describing each of 838 * the running tasks. 839 * 840 * @throws SecurityException Throws SecurityException if the caller does 841 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 842 */ 843 public List<RunningTaskInfo> getRunningTasks(int maxNum) 844 throws SecurityException { 845 return getRunningTasks(maxNum, 0, null); 846 } 847 848 /** 849 * Remove some end of a task's activity stack that is not part of 850 * the main application. The selected activities will be finished, so 851 * they are no longer part of the main task. 852 * 853 * @param taskId The identifier of the task. 854 * @param subTaskIndex The number of the sub-task; this corresponds 855 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 856 * @return Returns true if the sub-task was found and was removed. 857 * 858 * @hide 859 */ 860 public boolean removeSubTask(int taskId, int subTaskIndex) 861 throws SecurityException { 862 try { 863 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 864 } catch (RemoteException e) { 865 // System dead, we will be dead too soon! 866 return false; 867 } 868 } 869 870 /** 871 * If set, the process of the root activity of the task will be killed 872 * as part of removing the task. 873 * @hide 874 */ 875 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 876 877 /** 878 * Completely remove the given task. 879 * 880 * @param taskId Identifier of the task to be removed. 881 * @param flags Additional operational flags. May be 0 or 882 * {@link #REMOVE_TASK_KILL_PROCESS}. 883 * @return Returns true if the given task was found and removed. 884 * 885 * @hide 886 */ 887 public boolean removeTask(int taskId, int flags) 888 throws SecurityException { 889 try { 890 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 891 } catch (RemoteException e) { 892 // System dead, we will be dead too soon! 893 return false; 894 } 895 } 896 897 /** @hide */ 898 public static class TaskThumbnails implements Parcelable { 899 public Bitmap mainThumbnail; 900 901 public int numSubThumbbails; 902 903 /** @hide */ 904 public IThumbnailRetriever retriever; 905 906 public TaskThumbnails() { 907 } 908 909 public Bitmap getSubThumbnail(int index) { 910 try { 911 return retriever.getThumbnail(index); 912 } catch (RemoteException e) { 913 return null; 914 } 915 } 916 917 public int describeContents() { 918 return 0; 919 } 920 921 public void writeToParcel(Parcel dest, int flags) { 922 if (mainThumbnail != null) { 923 dest.writeInt(1); 924 mainThumbnail.writeToParcel(dest, 0); 925 } else { 926 dest.writeInt(0); 927 } 928 dest.writeInt(numSubThumbbails); 929 dest.writeStrongInterface(retriever); 930 } 931 932 public void readFromParcel(Parcel source) { 933 if (source.readInt() != 0) { 934 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 935 } else { 936 mainThumbnail = null; 937 } 938 numSubThumbbails = source.readInt(); 939 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 940 } 941 942 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 943 public TaskThumbnails createFromParcel(Parcel source) { 944 return new TaskThumbnails(source); 945 } 946 public TaskThumbnails[] newArray(int size) { 947 return new TaskThumbnails[size]; 948 } 949 }; 950 951 private TaskThumbnails(Parcel source) { 952 readFromParcel(source); 953 } 954 } 955 956 /** @hide */ 957 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 958 try { 959 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 960 } catch (RemoteException e) { 961 // System dead, we will be dead too soon! 962 return null; 963 } 964 } 965 966 /** @hide */ 967 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 968 try { 969 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 970 } catch (RemoteException e) { 971 // System dead, we will be dead too soon! 972 return null; 973 } 974 } 975 976 /** @hide */ 977 public boolean isInHomeStack(int taskId) { 978 try { 979 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 980 } catch (RemoteException e) { 981 // System dead, we will be dead too soon! 982 return false; 983 } 984 } 985 986 /** 987 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 988 * activity along with the task, so it is positioned immediately behind 989 * the task. 990 */ 991 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 992 993 /** 994 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 995 * user-instigated action, so the current activity will not receive a 996 * hint that the user is leaving. 997 */ 998 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 999 1000 /** 1001 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1002 * with a null options argument. 1003 * 1004 * @param taskId The identifier of the task to be moved, as found in 1005 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1006 * @param flags Additional operational flags, 0 or more of 1007 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1008 */ 1009 public void moveTaskToFront(int taskId, int flags) { 1010 moveTaskToFront(taskId, flags, null); 1011 } 1012 1013 /** 1014 * Ask that the task associated with a given task ID be moved to the 1015 * front of the stack, so it is now visible to the user. Requires that 1016 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1017 * or a SecurityException will be thrown. 1018 * 1019 * @param taskId The identifier of the task to be moved, as found in 1020 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1021 * @param flags Additional operational flags, 0 or more of 1022 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1023 * @param options Additional options for the operation, either null or 1024 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1025 * Context.startActivity(Intent, Bundle)}. 1026 */ 1027 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1028 try { 1029 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1030 } catch (RemoteException e) { 1031 // System dead, we will be dead too soon! 1032 } 1033 } 1034 1035 /** 1036 * Information you can retrieve about a particular Service that is 1037 * currently running in the system. 1038 */ 1039 public static class RunningServiceInfo implements Parcelable { 1040 /** 1041 * The service component. 1042 */ 1043 public ComponentName service; 1044 1045 /** 1046 * If non-zero, this is the process the service is running in. 1047 */ 1048 public int pid; 1049 1050 /** 1051 * The UID that owns this service. 1052 */ 1053 public int uid; 1054 1055 /** 1056 * The name of the process this service runs in. 1057 */ 1058 public String process; 1059 1060 /** 1061 * Set to true if the service has asked to run as a foreground process. 1062 */ 1063 public boolean foreground; 1064 1065 /** 1066 * The time when the service was first made active, either by someone 1067 * starting or binding to it. This 1068 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1069 */ 1070 public long activeSince; 1071 1072 /** 1073 * Set to true if this service has been explicitly started. 1074 */ 1075 public boolean started; 1076 1077 /** 1078 * Number of clients connected to the service. 1079 */ 1080 public int clientCount; 1081 1082 /** 1083 * Number of times the service's process has crashed while the service 1084 * is running. 1085 */ 1086 public int crashCount; 1087 1088 /** 1089 * The time when there was last activity in the service (either 1090 * explicit requests to start it or clients binding to it). This 1091 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1092 */ 1093 public long lastActivityTime; 1094 1095 /** 1096 * If non-zero, this service is not currently running, but scheduled to 1097 * restart at the given time. 1098 */ 1099 public long restarting; 1100 1101 /** 1102 * Bit for {@link #flags}: set if this service has been 1103 * explicitly started. 1104 */ 1105 public static final int FLAG_STARTED = 1<<0; 1106 1107 /** 1108 * Bit for {@link #flags}: set if the service has asked to 1109 * run as a foreground process. 1110 */ 1111 public static final int FLAG_FOREGROUND = 1<<1; 1112 1113 /** 1114 * Bit for {@link #flags): set if the service is running in a 1115 * core system process. 1116 */ 1117 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1118 1119 /** 1120 * Bit for {@link #flags): set if the service is running in a 1121 * persistent process. 1122 */ 1123 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1124 1125 /** 1126 * Running flags. 1127 */ 1128 public int flags; 1129 1130 /** 1131 * For special services that are bound to by system code, this is 1132 * the package that holds the binding. 1133 */ 1134 public String clientPackage; 1135 1136 /** 1137 * For special services that are bound to by system code, this is 1138 * a string resource providing a user-visible label for who the 1139 * client is. 1140 */ 1141 public int clientLabel; 1142 1143 public RunningServiceInfo() { 1144 } 1145 1146 public int describeContents() { 1147 return 0; 1148 } 1149 1150 public void writeToParcel(Parcel dest, int flags) { 1151 ComponentName.writeToParcel(service, dest); 1152 dest.writeInt(pid); 1153 dest.writeInt(uid); 1154 dest.writeString(process); 1155 dest.writeInt(foreground ? 1 : 0); 1156 dest.writeLong(activeSince); 1157 dest.writeInt(started ? 1 : 0); 1158 dest.writeInt(clientCount); 1159 dest.writeInt(crashCount); 1160 dest.writeLong(lastActivityTime); 1161 dest.writeLong(restarting); 1162 dest.writeInt(this.flags); 1163 dest.writeString(clientPackage); 1164 dest.writeInt(clientLabel); 1165 } 1166 1167 public void readFromParcel(Parcel source) { 1168 service = ComponentName.readFromParcel(source); 1169 pid = source.readInt(); 1170 uid = source.readInt(); 1171 process = source.readString(); 1172 foreground = source.readInt() != 0; 1173 activeSince = source.readLong(); 1174 started = source.readInt() != 0; 1175 clientCount = source.readInt(); 1176 crashCount = source.readInt(); 1177 lastActivityTime = source.readLong(); 1178 restarting = source.readLong(); 1179 flags = source.readInt(); 1180 clientPackage = source.readString(); 1181 clientLabel = source.readInt(); 1182 } 1183 1184 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1185 public RunningServiceInfo createFromParcel(Parcel source) { 1186 return new RunningServiceInfo(source); 1187 } 1188 public RunningServiceInfo[] newArray(int size) { 1189 return new RunningServiceInfo[size]; 1190 } 1191 }; 1192 1193 private RunningServiceInfo(Parcel source) { 1194 readFromParcel(source); 1195 } 1196 } 1197 1198 /** 1199 * Return a list of the services that are currently running. 1200 * 1201 * <p><b>Note: this method is only intended for debugging or implementing 1202 * service management type user interfaces.</b></p> 1203 * 1204 * @param maxNum The maximum number of entries to return in the list. The 1205 * actual number returned may be smaller, depending on how many services 1206 * are running. 1207 * 1208 * @return Returns a list of RunningServiceInfo records describing each of 1209 * the running tasks. 1210 */ 1211 public List<RunningServiceInfo> getRunningServices(int maxNum) 1212 throws SecurityException { 1213 try { 1214 return ActivityManagerNative.getDefault() 1215 .getServices(maxNum, 0); 1216 } catch (RemoteException e) { 1217 // System dead, we will be dead too soon! 1218 return null; 1219 } 1220 } 1221 1222 /** 1223 * Returns a PendingIntent you can start to show a control panel for the 1224 * given running service. If the service does not have a control panel, 1225 * null is returned. 1226 */ 1227 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1228 throws SecurityException { 1229 try { 1230 return ActivityManagerNative.getDefault() 1231 .getRunningServiceControlPanel(service); 1232 } catch (RemoteException e) { 1233 // System dead, we will be dead too soon! 1234 return null; 1235 } 1236 } 1237 1238 /** 1239 * Information you can retrieve about the available memory through 1240 * {@link ActivityManager#getMemoryInfo}. 1241 */ 1242 public static class MemoryInfo implements Parcelable { 1243 /** 1244 * The available memory on the system. This number should not 1245 * be considered absolute: due to the nature of the kernel, a significant 1246 * portion of this memory is actually in use and needed for the overall 1247 * system to run well. 1248 */ 1249 public long availMem; 1250 1251 /** 1252 * The total memory accessible by the kernel. This is basically the 1253 * RAM size of the device, not including below-kernel fixed allocations 1254 * like DMA buffers, RAM for the baseband CPU, etc. 1255 */ 1256 public long totalMem; 1257 1258 /** 1259 * The threshold of {@link #availMem} at which we consider memory to be 1260 * low and start killing background services and other non-extraneous 1261 * processes. 1262 */ 1263 public long threshold; 1264 1265 /** 1266 * Set to true if the system considers itself to currently be in a low 1267 * memory situation. 1268 */ 1269 public boolean lowMemory; 1270 1271 /** @hide */ 1272 public long hiddenAppThreshold; 1273 /** @hide */ 1274 public long secondaryServerThreshold; 1275 /** @hide */ 1276 public long visibleAppThreshold; 1277 /** @hide */ 1278 public long foregroundAppThreshold; 1279 1280 public MemoryInfo() { 1281 } 1282 1283 public int describeContents() { 1284 return 0; 1285 } 1286 1287 public void writeToParcel(Parcel dest, int flags) { 1288 dest.writeLong(availMem); 1289 dest.writeLong(totalMem); 1290 dest.writeLong(threshold); 1291 dest.writeInt(lowMemory ? 1 : 0); 1292 dest.writeLong(hiddenAppThreshold); 1293 dest.writeLong(secondaryServerThreshold); 1294 dest.writeLong(visibleAppThreshold); 1295 dest.writeLong(foregroundAppThreshold); 1296 } 1297 1298 public void readFromParcel(Parcel source) { 1299 availMem = source.readLong(); 1300 totalMem = source.readLong(); 1301 threshold = source.readLong(); 1302 lowMemory = source.readInt() != 0; 1303 hiddenAppThreshold = source.readLong(); 1304 secondaryServerThreshold = source.readLong(); 1305 visibleAppThreshold = source.readLong(); 1306 foregroundAppThreshold = source.readLong(); 1307 } 1308 1309 public static final Creator<MemoryInfo> CREATOR 1310 = new Creator<MemoryInfo>() { 1311 public MemoryInfo createFromParcel(Parcel source) { 1312 return new MemoryInfo(source); 1313 } 1314 public MemoryInfo[] newArray(int size) { 1315 return new MemoryInfo[size]; 1316 } 1317 }; 1318 1319 private MemoryInfo(Parcel source) { 1320 readFromParcel(source); 1321 } 1322 } 1323 1324 /** 1325 * Return general information about the memory state of the system. This 1326 * can be used to help decide how to manage your own memory, though note 1327 * that polling is not recommended and 1328 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1329 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1330 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1331 * level of your process as needed, which gives a better hint for how to 1332 * manage its memory. 1333 */ 1334 public void getMemoryInfo(MemoryInfo outInfo) { 1335 try { 1336 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1337 } catch (RemoteException e) { 1338 } 1339 } 1340 1341 /** 1342 * Information you can retrieve about an ActivityStack in the system. 1343 * @hide 1344 */ 1345 public static class StackInfo implements Parcelable { 1346 public int stackId; 1347 public Rect bounds = new Rect(); 1348 public int[] taskIds; 1349 public String[] taskNames; 1350 public int displayId; 1351 1352 @Override 1353 public int describeContents() { 1354 return 0; 1355 } 1356 1357 @Override 1358 public void writeToParcel(Parcel dest, int flags) { 1359 dest.writeInt(stackId); 1360 dest.writeInt(bounds.left); 1361 dest.writeInt(bounds.top); 1362 dest.writeInt(bounds.right); 1363 dest.writeInt(bounds.bottom); 1364 dest.writeIntArray(taskIds); 1365 dest.writeStringArray(taskNames); 1366 dest.writeInt(displayId); 1367 } 1368 1369 public void readFromParcel(Parcel source) { 1370 stackId = source.readInt(); 1371 bounds = new Rect( 1372 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1373 taskIds = source.createIntArray(); 1374 taskNames = source.createStringArray(); 1375 displayId = source.readInt(); 1376 } 1377 1378 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1379 @Override 1380 public StackInfo createFromParcel(Parcel source) { 1381 return new StackInfo(source); 1382 } 1383 @Override 1384 public StackInfo[] newArray(int size) { 1385 return new StackInfo[size]; 1386 } 1387 }; 1388 1389 public StackInfo() { 1390 } 1391 1392 private StackInfo(Parcel source) { 1393 readFromParcel(source); 1394 } 1395 1396 public String toString(String prefix) { 1397 StringBuilder sb = new StringBuilder(256); 1398 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1399 sb.append(" bounds="); sb.append(bounds.toShortString()); 1400 sb.append(" displayId="); sb.append(displayId); 1401 sb.append("\n"); 1402 prefix = prefix + " "; 1403 for (int i = 0; i < taskIds.length; ++i) { 1404 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1405 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1406 } 1407 return sb.toString(); 1408 } 1409 1410 @Override 1411 public String toString() { 1412 return toString(""); 1413 } 1414 } 1415 1416 /** 1417 * @hide 1418 */ 1419 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1420 try { 1421 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1422 observer, UserHandle.myUserId()); 1423 } catch (RemoteException e) { 1424 return false; 1425 } 1426 } 1427 1428 /** 1429 * Permits an application to erase its own data from disk. This is equivalent to 1430 * the user choosing to clear the app's data from within the device settings UI. It 1431 * erases all dynamic data associated with the app -- its private data and data in its 1432 * private area on external storage -- but does not remove the installed application 1433 * itself, nor any OBB files. 1434 * 1435 * @return {@code true} if the application successfully requested that the application's 1436 * data be erased; {@code false} otherwise. 1437 */ 1438 public boolean clearApplicationUserData() { 1439 return clearApplicationUserData(mContext.getPackageName(), null); 1440 } 1441 1442 /** 1443 * Information you can retrieve about any processes that are in an error condition. 1444 */ 1445 public static class ProcessErrorStateInfo implements Parcelable { 1446 /** 1447 * Condition codes 1448 */ 1449 public static final int NO_ERROR = 0; 1450 public static final int CRASHED = 1; 1451 public static final int NOT_RESPONDING = 2; 1452 1453 /** 1454 * The condition that the process is in. 1455 */ 1456 public int condition; 1457 1458 /** 1459 * The process name in which the crash or error occurred. 1460 */ 1461 public String processName; 1462 1463 /** 1464 * The pid of this process; 0 if none 1465 */ 1466 public int pid; 1467 1468 /** 1469 * The kernel user-ID that has been assigned to this process; 1470 * currently this is not a unique ID (multiple applications can have 1471 * the same uid). 1472 */ 1473 public int uid; 1474 1475 /** 1476 * The activity name associated with the error, if known. May be null. 1477 */ 1478 public String tag; 1479 1480 /** 1481 * A short message describing the error condition. 1482 */ 1483 public String shortMsg; 1484 1485 /** 1486 * A long message describing the error condition. 1487 */ 1488 public String longMsg; 1489 1490 /** 1491 * The stack trace where the error originated. May be null. 1492 */ 1493 public String stackTrace; 1494 1495 /** 1496 * to be deprecated: This value will always be null. 1497 */ 1498 public byte[] crashData = null; 1499 1500 public ProcessErrorStateInfo() { 1501 } 1502 1503 @Override 1504 public int describeContents() { 1505 return 0; 1506 } 1507 1508 @Override 1509 public void writeToParcel(Parcel dest, int flags) { 1510 dest.writeInt(condition); 1511 dest.writeString(processName); 1512 dest.writeInt(pid); 1513 dest.writeInt(uid); 1514 dest.writeString(tag); 1515 dest.writeString(shortMsg); 1516 dest.writeString(longMsg); 1517 dest.writeString(stackTrace); 1518 } 1519 1520 public void readFromParcel(Parcel source) { 1521 condition = source.readInt(); 1522 processName = source.readString(); 1523 pid = source.readInt(); 1524 uid = source.readInt(); 1525 tag = source.readString(); 1526 shortMsg = source.readString(); 1527 longMsg = source.readString(); 1528 stackTrace = source.readString(); 1529 } 1530 1531 public static final Creator<ProcessErrorStateInfo> CREATOR = 1532 new Creator<ProcessErrorStateInfo>() { 1533 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1534 return new ProcessErrorStateInfo(source); 1535 } 1536 public ProcessErrorStateInfo[] newArray(int size) { 1537 return new ProcessErrorStateInfo[size]; 1538 } 1539 }; 1540 1541 private ProcessErrorStateInfo(Parcel source) { 1542 readFromParcel(source); 1543 } 1544 } 1545 1546 /** 1547 * Returns a list of any processes that are currently in an error condition. The result 1548 * will be null if all processes are running properly at this time. 1549 * 1550 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1551 * current error conditions (it will not return an empty list). This list ordering is not 1552 * specified. 1553 */ 1554 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1555 try { 1556 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1557 } catch (RemoteException e) { 1558 return null; 1559 } 1560 } 1561 1562 /** 1563 * Information you can retrieve about a running process. 1564 */ 1565 public static class RunningAppProcessInfo implements Parcelable { 1566 /** 1567 * The name of the process that this object is associated with 1568 */ 1569 public String processName; 1570 1571 /** 1572 * The pid of this process; 0 if none 1573 */ 1574 public int pid; 1575 1576 /** 1577 * The user id of this process. 1578 */ 1579 public int uid; 1580 1581 /** 1582 * All packages that have been loaded into the process. 1583 */ 1584 public String pkgList[]; 1585 1586 /** 1587 * Constant for {@link #flags}: this is an app that is unable to 1588 * correctly save its state when going to the background, 1589 * so it can not be killed while in the background. 1590 * @hide 1591 */ 1592 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1593 1594 /** 1595 * Constant for {@link #flags}: this process is associated with a 1596 * persistent system app. 1597 * @hide 1598 */ 1599 public static final int FLAG_PERSISTENT = 1<<1; 1600 1601 /** 1602 * Constant for {@link #flags}: this process is associated with a 1603 * persistent system app. 1604 * @hide 1605 */ 1606 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1607 1608 /** 1609 * Flags of information. May be any of 1610 * {@link #FLAG_CANT_SAVE_STATE}. 1611 * @hide 1612 */ 1613 public int flags; 1614 1615 /** 1616 * Last memory trim level reported to the process: corresponds to 1617 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1618 * ComponentCallbacks2.onTrimMemory(int)}. 1619 */ 1620 public int lastTrimLevel; 1621 1622 /** 1623 * Constant for {@link #importance}: this is a persistent process. 1624 * Only used when reporting to process observers. 1625 * @hide 1626 */ 1627 public static final int IMPORTANCE_PERSISTENT = 50; 1628 1629 /** 1630 * Constant for {@link #importance}: this process is running the 1631 * foreground UI. 1632 */ 1633 public static final int IMPORTANCE_FOREGROUND = 100; 1634 1635 /** 1636 * Constant for {@link #importance}: this process is running something 1637 * that is actively visible to the user, though not in the immediate 1638 * foreground. 1639 */ 1640 public static final int IMPORTANCE_VISIBLE = 200; 1641 1642 /** 1643 * Constant for {@link #importance}: this process is running something 1644 * that is considered to be actively perceptible to the user. An 1645 * example would be an application performing background music playback. 1646 */ 1647 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1648 1649 /** 1650 * Constant for {@link #importance}: this process is running an 1651 * application that can not save its state, and thus can't be killed 1652 * while in the background. 1653 * @hide 1654 */ 1655 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1656 1657 /** 1658 * Constant for {@link #importance}: this process is contains services 1659 * that should remain running. 1660 */ 1661 public static final int IMPORTANCE_SERVICE = 300; 1662 1663 /** 1664 * Constant for {@link #importance}: this process process contains 1665 * background code that is expendable. 1666 */ 1667 public static final int IMPORTANCE_BACKGROUND = 400; 1668 1669 /** 1670 * Constant for {@link #importance}: this process is empty of any 1671 * actively running code. 1672 */ 1673 public static final int IMPORTANCE_EMPTY = 500; 1674 1675 /** 1676 * The relative importance level that the system places on this 1677 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1678 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1679 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1680 * constants are numbered so that "more important" values are always 1681 * smaller than "less important" values. 1682 */ 1683 public int importance; 1684 1685 /** 1686 * An additional ordering within a particular {@link #importance} 1687 * category, providing finer-grained information about the relative 1688 * utility of processes within a category. This number means nothing 1689 * except that a smaller values are more recently used (and thus 1690 * more important). Currently an LRU value is only maintained for 1691 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1692 * be maintained in the future. 1693 */ 1694 public int lru; 1695 1696 /** 1697 * Constant for {@link #importanceReasonCode}: nothing special has 1698 * been specified for the reason for this level. 1699 */ 1700 public static final int REASON_UNKNOWN = 0; 1701 1702 /** 1703 * Constant for {@link #importanceReasonCode}: one of the application's 1704 * content providers is being used by another process. The pid of 1705 * the client process is in {@link #importanceReasonPid} and the 1706 * target provider in this process is in 1707 * {@link #importanceReasonComponent}. 1708 */ 1709 public static final int REASON_PROVIDER_IN_USE = 1; 1710 1711 /** 1712 * Constant for {@link #importanceReasonCode}: one of the application's 1713 * content providers is being used by another process. The pid of 1714 * the client process is in {@link #importanceReasonPid} and the 1715 * target provider in this process is in 1716 * {@link #importanceReasonComponent}. 1717 */ 1718 public static final int REASON_SERVICE_IN_USE = 2; 1719 1720 /** 1721 * The reason for {@link #importance}, if any. 1722 */ 1723 public int importanceReasonCode; 1724 1725 /** 1726 * For the specified values of {@link #importanceReasonCode}, this 1727 * is the process ID of the other process that is a client of this 1728 * process. This will be 0 if no other process is using this one. 1729 */ 1730 public int importanceReasonPid; 1731 1732 /** 1733 * For the specified values of {@link #importanceReasonCode}, this 1734 * is the name of the component that is being used in this process. 1735 */ 1736 public ComponentName importanceReasonComponent; 1737 1738 /** 1739 * When {@link #importanceReasonPid} is non-0, this is the importance 1740 * of the other pid. @hide 1741 */ 1742 public int importanceReasonImportance; 1743 1744 public RunningAppProcessInfo() { 1745 importance = IMPORTANCE_FOREGROUND; 1746 importanceReasonCode = REASON_UNKNOWN; 1747 } 1748 1749 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1750 processName = pProcessName; 1751 pid = pPid; 1752 pkgList = pArr; 1753 } 1754 1755 public int describeContents() { 1756 return 0; 1757 } 1758 1759 public void writeToParcel(Parcel dest, int flags) { 1760 dest.writeString(processName); 1761 dest.writeInt(pid); 1762 dest.writeInt(uid); 1763 dest.writeStringArray(pkgList); 1764 dest.writeInt(this.flags); 1765 dest.writeInt(lastTrimLevel); 1766 dest.writeInt(importance); 1767 dest.writeInt(lru); 1768 dest.writeInt(importanceReasonCode); 1769 dest.writeInt(importanceReasonPid); 1770 ComponentName.writeToParcel(importanceReasonComponent, dest); 1771 dest.writeInt(importanceReasonImportance); 1772 } 1773 1774 public void readFromParcel(Parcel source) { 1775 processName = source.readString(); 1776 pid = source.readInt(); 1777 uid = source.readInt(); 1778 pkgList = source.readStringArray(); 1779 flags = source.readInt(); 1780 lastTrimLevel = source.readInt(); 1781 importance = source.readInt(); 1782 lru = source.readInt(); 1783 importanceReasonCode = source.readInt(); 1784 importanceReasonPid = source.readInt(); 1785 importanceReasonComponent = ComponentName.readFromParcel(source); 1786 importanceReasonImportance = source.readInt(); 1787 } 1788 1789 public static final Creator<RunningAppProcessInfo> CREATOR = 1790 new Creator<RunningAppProcessInfo>() { 1791 public RunningAppProcessInfo createFromParcel(Parcel source) { 1792 return new RunningAppProcessInfo(source); 1793 } 1794 public RunningAppProcessInfo[] newArray(int size) { 1795 return new RunningAppProcessInfo[size]; 1796 } 1797 }; 1798 1799 private RunningAppProcessInfo(Parcel source) { 1800 readFromParcel(source); 1801 } 1802 } 1803 1804 /** 1805 * Returns a list of application processes installed on external media 1806 * that are running on the device. 1807 * 1808 * <p><b>Note: this method is only intended for debugging or building 1809 * a user-facing process management UI.</b></p> 1810 * 1811 * @return Returns a list of ApplicationInfo records, or null if none 1812 * This list ordering is not specified. 1813 * @hide 1814 */ 1815 public List<ApplicationInfo> getRunningExternalApplications() { 1816 try { 1817 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1818 } catch (RemoteException e) { 1819 return null; 1820 } 1821 } 1822 1823 /** 1824 * Returns a list of application processes that are running on the device. 1825 * 1826 * <p><b>Note: this method is only intended for debugging or building 1827 * a user-facing process management UI.</b></p> 1828 * 1829 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1830 * running processes (it will not return an empty list). This list ordering is not 1831 * specified. 1832 */ 1833 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1834 try { 1835 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1836 } catch (RemoteException e) { 1837 return null; 1838 } 1839 } 1840 1841 /** 1842 * Return global memory state information for the calling process. This 1843 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 1844 * only fields that will be filled in are 1845 * {@link RunningAppProcessInfo#pid}, 1846 * {@link RunningAppProcessInfo#uid}, 1847 * {@link RunningAppProcessInfo#lastTrimLevel}, 1848 * {@link RunningAppProcessInfo#importance}, 1849 * {@link RunningAppProcessInfo#lru}, and 1850 * {@link RunningAppProcessInfo#importanceReasonCode}. 1851 */ 1852 static public void getMyMemoryState(RunningAppProcessInfo outState) { 1853 try { 1854 ActivityManagerNative.getDefault().getMyMemoryState(outState); 1855 } catch (RemoteException e) { 1856 } 1857 } 1858 1859 /** 1860 * Return information about the memory usage of one or more processes. 1861 * 1862 * <p><b>Note: this method is only intended for debugging or building 1863 * a user-facing process management UI.</b></p> 1864 * 1865 * @param pids The pids of the processes whose memory usage is to be 1866 * retrieved. 1867 * @return Returns an array of memory information, one for each 1868 * requested pid. 1869 */ 1870 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1871 try { 1872 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1873 } catch (RemoteException e) { 1874 return null; 1875 } 1876 } 1877 1878 /** 1879 * @deprecated This is now just a wrapper for 1880 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1881 * is no longer available to applications because it allows them to 1882 * break other applications by removing their alarms, stopping their 1883 * services, etc. 1884 */ 1885 @Deprecated 1886 public void restartPackage(String packageName) { 1887 killBackgroundProcesses(packageName); 1888 } 1889 1890 /** 1891 * Have the system immediately kill all background processes associated 1892 * with the given package. This is the same as the kernel killing those 1893 * processes to reclaim memory; the system will take care of restarting 1894 * these processes in the future as needed. 1895 * 1896 * <p>You must hold the permission 1897 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1898 * call this method. 1899 * 1900 * @param packageName The name of the package whose processes are to 1901 * be killed. 1902 */ 1903 public void killBackgroundProcesses(String packageName) { 1904 try { 1905 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 1906 UserHandle.myUserId()); 1907 } catch (RemoteException e) { 1908 } 1909 } 1910 1911 /** 1912 * Have the system perform a force stop of everything associated with 1913 * the given application package. All processes that share its uid 1914 * will be killed, all services it has running stopped, all activities 1915 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1916 * broadcast will be sent, so that any of its registered alarms can 1917 * be stopped, notifications removed, etc. 1918 * 1919 * <p>You must hold the permission 1920 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1921 * call this method. 1922 * 1923 * @param packageName The name of the package to be stopped. 1924 * 1925 * @hide This is not available to third party applications due to 1926 * it allowing them to break other applications by stopping their 1927 * services, removing their alarms, etc. 1928 */ 1929 public void forceStopPackage(String packageName) { 1930 try { 1931 ActivityManagerNative.getDefault().forceStopPackage(packageName, 1932 UserHandle.myUserId()); 1933 } catch (RemoteException e) { 1934 } 1935 } 1936 1937 /** 1938 * Get the device configuration attributes. 1939 */ 1940 public ConfigurationInfo getDeviceConfigurationInfo() { 1941 try { 1942 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 1943 } catch (RemoteException e) { 1944 } 1945 return null; 1946 } 1947 1948 /** 1949 * Get the preferred density of icons for the launcher. This is used when 1950 * custom drawables are created (e.g., for shortcuts). 1951 * 1952 * @return density in terms of DPI 1953 */ 1954 public int getLauncherLargeIconDensity() { 1955 final Resources res = mContext.getResources(); 1956 final int density = res.getDisplayMetrics().densityDpi; 1957 final int sw = res.getConfiguration().smallestScreenWidthDp; 1958 1959 if (sw < 600) { 1960 // Smaller than approx 7" tablets, use the regular icon size. 1961 return density; 1962 } 1963 1964 switch (density) { 1965 case DisplayMetrics.DENSITY_LOW: 1966 return DisplayMetrics.DENSITY_MEDIUM; 1967 case DisplayMetrics.DENSITY_MEDIUM: 1968 return DisplayMetrics.DENSITY_HIGH; 1969 case DisplayMetrics.DENSITY_TV: 1970 return DisplayMetrics.DENSITY_XHIGH; 1971 case DisplayMetrics.DENSITY_HIGH: 1972 return DisplayMetrics.DENSITY_XHIGH; 1973 case DisplayMetrics.DENSITY_XHIGH: 1974 return DisplayMetrics.DENSITY_XXHIGH; 1975 case DisplayMetrics.DENSITY_XXHIGH: 1976 return DisplayMetrics.DENSITY_XHIGH * 2; 1977 default: 1978 // The density is some abnormal value. Return some other 1979 // abnormal value that is a reasonable scaling of it. 1980 return (int)((density*1.5f)+.5f); 1981 } 1982 } 1983 1984 /** 1985 * Get the preferred launcher icon size. This is used when custom drawables 1986 * are created (e.g., for shortcuts). 1987 * 1988 * @return dimensions of square icons in terms of pixels 1989 */ 1990 public int getLauncherLargeIconSize() { 1991 return getLauncherLargeIconSizeInner(mContext); 1992 } 1993 1994 static int getLauncherLargeIconSizeInner(Context context) { 1995 final Resources res = context.getResources(); 1996 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 1997 final int sw = res.getConfiguration().smallestScreenWidthDp; 1998 1999 if (sw < 600) { 2000 // Smaller than approx 7" tablets, use the regular icon size. 2001 return size; 2002 } 2003 2004 final int density = res.getDisplayMetrics().densityDpi; 2005 2006 switch (density) { 2007 case DisplayMetrics.DENSITY_LOW: 2008 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2009 case DisplayMetrics.DENSITY_MEDIUM: 2010 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2011 case DisplayMetrics.DENSITY_TV: 2012 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2013 case DisplayMetrics.DENSITY_HIGH: 2014 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2015 case DisplayMetrics.DENSITY_XHIGH: 2016 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2017 case DisplayMetrics.DENSITY_XXHIGH: 2018 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2019 default: 2020 // The density is some abnormal value. Return some other 2021 // abnormal value that is a reasonable scaling of it. 2022 return (int)((size*1.5f) + .5f); 2023 } 2024 } 2025 2026 /** 2027 * Returns "true" if the user interface is currently being messed with 2028 * by a monkey. 2029 */ 2030 public static boolean isUserAMonkey() { 2031 try { 2032 return ActivityManagerNative.getDefault().isUserAMonkey(); 2033 } catch (RemoteException e) { 2034 } 2035 return false; 2036 } 2037 2038 /** 2039 * Returns "true" if device is running in a test harness. 2040 */ 2041 public static boolean isRunningInTestHarness() { 2042 return SystemProperties.getBoolean("ro.test_harness", false); 2043 } 2044 2045 /** 2046 * Returns the launch count of each installed package. 2047 * 2048 * @hide 2049 */ 2050 public Map<String, Integer> getAllPackageLaunchCounts() { 2051 try { 2052 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2053 ServiceManager.getService("usagestats")); 2054 if (usageStatsService == null) { 2055 return new HashMap<String, Integer>(); 2056 } 2057 2058 PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats(); 2059 if (allPkgUsageStats == null) { 2060 return new HashMap<String, Integer>(); 2061 } 2062 2063 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2064 for (PkgUsageStats pkgUsageStats : allPkgUsageStats) { 2065 launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount); 2066 } 2067 2068 return launchCounts; 2069 } catch (RemoteException e) { 2070 Log.w(TAG, "Could not query launch counts", e); 2071 return new HashMap<String, Integer>(); 2072 } 2073 } 2074 2075 /** @hide */ 2076 public static int checkComponentPermission(String permission, int uid, 2077 int owningUid, boolean exported) { 2078 // Root, system server get to do everything. 2079 if (uid == 0 || uid == Process.SYSTEM_UID) { 2080 return PackageManager.PERMISSION_GRANTED; 2081 } 2082 // Isolated processes don't get any permissions. 2083 if (UserHandle.isIsolated(uid)) { 2084 return PackageManager.PERMISSION_DENIED; 2085 } 2086 // If there is a uid that owns whatever is being accessed, it has 2087 // blanket access to it regardless of the permissions it requires. 2088 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2089 return PackageManager.PERMISSION_GRANTED; 2090 } 2091 // If the target is not exported, then nobody else can get to it. 2092 if (!exported) { 2093 /* 2094 RuntimeException here = new RuntimeException("here"); 2095 here.fillInStackTrace(); 2096 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2097 here); 2098 */ 2099 return PackageManager.PERMISSION_DENIED; 2100 } 2101 if (permission == null) { 2102 return PackageManager.PERMISSION_GRANTED; 2103 } 2104 try { 2105 return AppGlobals.getPackageManager() 2106 .checkUidPermission(permission, uid); 2107 } catch (RemoteException e) { 2108 // Should never happen, but if it does... deny! 2109 Slog.e(TAG, "PackageManager is dead?!?", e); 2110 } 2111 return PackageManager.PERMISSION_DENIED; 2112 } 2113 2114 /** @hide */ 2115 public static int checkUidPermission(String permission, int uid) { 2116 try { 2117 return AppGlobals.getPackageManager() 2118 .checkUidPermission(permission, uid); 2119 } catch (RemoteException e) { 2120 // Should never happen, but if it does... deny! 2121 Slog.e(TAG, "PackageManager is dead?!?", e); 2122 } 2123 return PackageManager.PERMISSION_DENIED; 2124 } 2125 2126 /** 2127 * @hide 2128 * Helper for dealing with incoming user arguments to system service calls. 2129 * Takes care of checking permissions and converting USER_CURRENT to the 2130 * actual current user. 2131 * 2132 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2133 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2134 * @param userId The user id argument supplied by the caller -- this is the user 2135 * they want to run as. 2136 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2137 * to get a USER_ALL returned and deal with it correctly. If false, 2138 * an exception will be thrown if USER_ALL is supplied. 2139 * @param requireFull If true, the caller must hold 2140 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2141 * different user than their current process; otherwise they must hold 2142 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2143 * @param name Optional textual name of the incoming call; only for generating error messages. 2144 * @param callerPackage Optional package name of caller; only for error messages. 2145 * 2146 * @return Returns the user ID that the call should run as. Will always be a concrete 2147 * user number, unless <var>allowAll</var> is true in which case it could also be 2148 * USER_ALL. 2149 */ 2150 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2151 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2152 if (UserHandle.getUserId(callingUid) == userId) { 2153 return userId; 2154 } 2155 try { 2156 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2157 callingUid, userId, allowAll, requireFull, name, callerPackage); 2158 } catch (RemoteException e) { 2159 throw new SecurityException("Failed calling activity manager", e); 2160 } 2161 } 2162 2163 /** @hide */ 2164 public static int getCurrentUser() { 2165 UserInfo ui; 2166 try { 2167 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2168 return ui != null ? ui.id : 0; 2169 } catch (RemoteException e) { 2170 return 0; 2171 } 2172 } 2173 2174 /** 2175 * Returns the usage statistics of each installed package. 2176 * 2177 * @hide 2178 */ 2179 public PkgUsageStats[] getAllPackageUsageStats() { 2180 try { 2181 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2182 ServiceManager.getService("usagestats")); 2183 if (usageStatsService != null) { 2184 return usageStatsService.getAllPkgUsageStats(); 2185 } 2186 } catch (RemoteException e) { 2187 Log.w(TAG, "Could not query usage stats", e); 2188 } 2189 return new PkgUsageStats[0]; 2190 } 2191 2192 /** 2193 * @param userid the user's id. Zero indicates the default user 2194 * @hide 2195 */ 2196 public boolean switchUser(int userid) { 2197 try { 2198 return ActivityManagerNative.getDefault().switchUser(userid); 2199 } catch (RemoteException e) { 2200 return false; 2201 } 2202 } 2203 2204 /** 2205 * Return whether the given user is actively running. This means that 2206 * the user is in the "started" state, not "stopped" -- it is currently 2207 * allowed to run code through scheduled alarms, receiving broadcasts, 2208 * etc. A started user may be either the current foreground user or a 2209 * background user; the result here does not distinguish between the two. 2210 * @param userid the user's id. Zero indicates the default user. 2211 * @hide 2212 */ 2213 public boolean isUserRunning(int userid) { 2214 try { 2215 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2216 } catch (RemoteException e) { 2217 return false; 2218 } 2219 } 2220 2221 /** 2222 * Perform a system dump of various state associated with the given application 2223 * package name. This call blocks while the dump is being performed, so should 2224 * not be done on a UI thread. The data will be written to the given file 2225 * descriptor as text. An application must hold the 2226 * {@link android.Manifest.permission#DUMP} permission to make this call. 2227 * @param fd The file descriptor that the dump should be written to. The file 2228 * descriptor is <em>not</em> closed by this function; the caller continues to 2229 * own it. 2230 * @param packageName The name of the package that is to be dumped. 2231 */ 2232 public void dumpPackageState(FileDescriptor fd, String packageName) { 2233 dumpPackageStateStatic(fd, packageName); 2234 } 2235 2236 /** 2237 * @hide 2238 */ 2239 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2240 FileOutputStream fout = new FileOutputStream(fd); 2241 PrintWriter pw = new FastPrintWriter(fout); 2242 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2243 "-a", "package", packageName }); 2244 pw.println(); 2245 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2246 pw.println(); 2247 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2248 pw.println(); 2249 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2250 pw.println(); 2251 dumpService(pw, fd, "package", new String[] { packageName }); 2252 pw.println(); 2253 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2254 pw.flush(); 2255 } 2256 2257 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2258 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2259 IBinder service = ServiceManager.checkService(name); 2260 if (service == null) { 2261 pw.println(" (Service not found)"); 2262 return; 2263 } 2264 TransferPipe tp = null; 2265 try { 2266 pw.flush(); 2267 tp = new TransferPipe(); 2268 tp.setBufferPrefix(" "); 2269 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2270 tp.go(fd); 2271 } catch (Throwable e) { 2272 if (tp != null) { 2273 tp.kill(); 2274 } 2275 pw.println("Failure dumping service:"); 2276 e.printStackTrace(pw); 2277 } 2278 } 2279 2280 /** 2281 * @hide 2282 */ 2283 public void startLockTaskMode(int taskId) { 2284 try { 2285 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2286 } catch (RemoteException e) { 2287 } 2288 } 2289 2290 /** 2291 * @hide 2292 */ 2293 public void stopLockTaskMode() { 2294 try { 2295 ActivityManagerNative.getDefault().stopLockTaskMode(); 2296 } catch (RemoteException e) { 2297 } 2298 } 2299 2300 /** 2301 * @hide 2302 */ 2303 public boolean isInLockTaskMode() { 2304 try { 2305 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2306 } catch (RemoteException e) { 2307 return false; 2308 } 2309 } 2310} 2311