ActivityManager.java revision 2a764949c943681a4d25a17a0b203a0127a4a486
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 520 * {@link Activity#setRecentsLabel}. 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#setRecentsIcon}. 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 if (source.readInt() != 0) { 567 baseIntent = Intent.CREATOR.createFromParcel(source); 568 } else { 569 baseIntent = null; 570 } 571 origActivity = ComponentName.readFromParcel(source); 572 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 573 activityLabel = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 574 activityIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 575 stackId = source.readInt(); 576 userId = source.readInt(); 577 } 578 579 public static final Creator<RecentTaskInfo> CREATOR 580 = new Creator<RecentTaskInfo>() { 581 public RecentTaskInfo createFromParcel(Parcel source) { 582 return new RecentTaskInfo(source); 583 } 584 public RecentTaskInfo[] newArray(int size) { 585 return new RecentTaskInfo[size]; 586 } 587 }; 588 589 private RecentTaskInfo(Parcel source) { 590 readFromParcel(source); 591 } 592 } 593 594 /** 595 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 596 * that have set their 597 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 598 */ 599 public static final int RECENT_WITH_EXCLUDED = 0x0001; 600 601 /** 602 * Provides a list that does not contain any 603 * recent tasks that currently are not available to the user. 604 */ 605 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 606 607 /** 608 * Provides a list that contains recent tasks for all 609 * profiles of a user. 610 * @hide 611 */ 612 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 613 614 /** 615 * Return a list of the tasks that the user has recently launched, with 616 * the most recent being first and older ones after in order. 617 * 618 * <p><b>Note: this method is only intended for debugging and presenting 619 * task management user interfaces</b>. This should never be used for 620 * core logic in an application, such as deciding between different 621 * behaviors based on the information found here. Such uses are 622 * <em>not</em> supported, and will likely break in the future. For 623 * example, if multiple applications can be actively running at the 624 * same time, assumptions made about the meaning of the data here for 625 * purposes of control flow will be incorrect.</p> 626 * 627 * @param maxNum The maximum number of entries to return in the list. The 628 * actual number returned may be smaller, depending on how many tasks the 629 * user has started and the maximum number the system can remember. 630 * @param flags Information about what to return. May be any combination 631 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 632 * 633 * @return Returns a list of RecentTaskInfo records describing each of 634 * the recent tasks. 635 * 636 * @throws SecurityException Throws SecurityException if the caller does 637 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 638 */ 639 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 640 throws SecurityException { 641 try { 642 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 643 flags, UserHandle.myUserId()); 644 } catch (RemoteException e) { 645 // System dead, we will be dead too soon! 646 return null; 647 } 648 } 649 650 /** 651 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 652 * specific user. It requires holding 653 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 654 * @param maxNum The maximum number of entries to return in the list. The 655 * actual number returned may be smaller, depending on how many tasks the 656 * user has started and the maximum number the system can remember. 657 * @param flags Information about what to return. May be any combination 658 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 659 * 660 * @return Returns a list of RecentTaskInfo records describing each of 661 * the recent tasks. 662 * 663 * @throws SecurityException Throws SecurityException if the caller does 664 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 665 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 666 * @hide 667 */ 668 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 669 throws SecurityException { 670 try { 671 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 672 flags, userId); 673 } catch (RemoteException e) { 674 // System dead, we will be dead too soon! 675 return null; 676 } 677 } 678 679 /** 680 * Information you can retrieve about a particular task that is currently 681 * "running" in the system. Note that a running task does not mean the 682 * given task actually has a process it is actively running in; it simply 683 * means that the user has gone to it and never closed it, but currently 684 * the system may have killed its process and is only holding on to its 685 * last state in order to restart it when the user returns. 686 */ 687 public static class RunningTaskInfo implements Parcelable { 688 /** 689 * A unique identifier for this task. 690 */ 691 public int id; 692 693 /** 694 * The component launched as the first activity in the task. This can 695 * be considered the "application" of this task. 696 */ 697 public ComponentName baseActivity; 698 699 /** 700 * The activity component at the top of the history stack of the task. 701 * This is what the user is currently doing. 702 */ 703 public ComponentName topActivity; 704 705 /** 706 * Thumbnail representation of the task's current state. Currently 707 * always null. 708 */ 709 public Bitmap thumbnail; 710 711 /** 712 * Description of the task's current state. 713 */ 714 public CharSequence description; 715 716 /** 717 * Number of activities in this task. 718 */ 719 public int numActivities; 720 721 /** 722 * Number of activities that are currently running (not stopped 723 * and persisted) in this task. 724 */ 725 public int numRunning; 726 727 /** 728 * Last time task was run. For sorting. 729 * @hide 730 */ 731 public long lastActiveTime; 732 733 public RunningTaskInfo() { 734 } 735 736 public int describeContents() { 737 return 0; 738 } 739 740 public void writeToParcel(Parcel dest, int flags) { 741 dest.writeInt(id); 742 ComponentName.writeToParcel(baseActivity, dest); 743 ComponentName.writeToParcel(topActivity, dest); 744 if (thumbnail != null) { 745 dest.writeInt(1); 746 thumbnail.writeToParcel(dest, 0); 747 } else { 748 dest.writeInt(0); 749 } 750 TextUtils.writeToParcel(description, dest, 751 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 752 dest.writeInt(numActivities); 753 dest.writeInt(numRunning); 754 } 755 756 public void readFromParcel(Parcel source) { 757 id = source.readInt(); 758 baseActivity = ComponentName.readFromParcel(source); 759 topActivity = ComponentName.readFromParcel(source); 760 if (source.readInt() != 0) { 761 thumbnail = Bitmap.CREATOR.createFromParcel(source); 762 } else { 763 thumbnail = null; 764 } 765 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 766 numActivities = source.readInt(); 767 numRunning = source.readInt(); 768 } 769 770 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 771 public RunningTaskInfo createFromParcel(Parcel source) { 772 return new RunningTaskInfo(source); 773 } 774 public RunningTaskInfo[] newArray(int size) { 775 return new RunningTaskInfo[size]; 776 } 777 }; 778 779 private RunningTaskInfo(Parcel source) { 780 readFromParcel(source); 781 } 782 } 783 784 /** 785 * Return a list of the tasks that are currently running, with 786 * the most recent being first and older ones after in order. Note that 787 * "running" does not mean any of the task's code is currently loaded or 788 * activity -- the task may have been frozen by the system, so that it 789 * can be restarted in its previous state when next brought to the 790 * foreground. 791 * 792 * @param maxNum The maximum number of entries to return in the list. The 793 * actual number returned may be smaller, depending on how many tasks the 794 * user has started. 795 * 796 * @param flags Optional flags 797 * @param receiver Optional receiver for delayed thumbnails 798 * 799 * @return Returns a list of RunningTaskInfo records describing each of 800 * the running tasks. 801 * 802 * Some thumbnails may not be available at the time of this call. The optional 803 * receiver may be used to receive those thumbnails. 804 * 805 * @throws SecurityException Throws SecurityException if the caller does 806 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 807 * 808 * @hide 809 */ 810 public List<RunningTaskInfo> getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver) 811 throws SecurityException { 812 try { 813 return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver); 814 } catch (RemoteException e) { 815 // System dead, we will be dead too soon! 816 return null; 817 } 818 } 819 820 /** 821 * Return a list of the tasks that are currently running, with 822 * the most recent being first and older ones after in order. Note that 823 * "running" does not mean any of the task's code is currently loaded or 824 * activity -- the task may have been frozen by the system, so that it 825 * can be restarted in its previous state when next brought to the 826 * foreground. 827 * 828 * <p><b>Note: this method is only intended for debugging and presenting 829 * task management user interfaces</b>. This should never be used for 830 * core logic in an application, such as deciding between different 831 * behaviors based on the information found here. Such uses are 832 * <em>not</em> supported, and will likely break in the future. For 833 * example, if multiple applications can be actively running at the 834 * same time, assumptions made about the meaning of the data here for 835 * purposes of control flow will be incorrect.</p> 836 * 837 * @param maxNum The maximum number of entries to return in the list. The 838 * actual number returned may be smaller, depending on how many tasks the 839 * user has started. 840 * 841 * @return Returns a list of RunningTaskInfo records describing each of 842 * the running tasks. 843 * 844 * @throws SecurityException Throws SecurityException if the caller does 845 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 846 */ 847 public List<RunningTaskInfo> getRunningTasks(int maxNum) 848 throws SecurityException { 849 return getRunningTasks(maxNum, 0, null); 850 } 851 852 /** 853 * Remove some end of a task's activity stack that is not part of 854 * the main application. The selected activities will be finished, so 855 * they are no longer part of the main task. 856 * 857 * @param taskId The identifier of the task. 858 * @param subTaskIndex The number of the sub-task; this corresponds 859 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 860 * @return Returns true if the sub-task was found and was removed. 861 * 862 * @hide 863 */ 864 public boolean removeSubTask(int taskId, int subTaskIndex) 865 throws SecurityException { 866 try { 867 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 868 } catch (RemoteException e) { 869 // System dead, we will be dead too soon! 870 return false; 871 } 872 } 873 874 /** 875 * If set, the process of the root activity of the task will be killed 876 * as part of removing the task. 877 * @hide 878 */ 879 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 880 881 /** 882 * Completely remove the given task. 883 * 884 * @param taskId Identifier of the task to be removed. 885 * @param flags Additional operational flags. May be 0 or 886 * {@link #REMOVE_TASK_KILL_PROCESS}. 887 * @return Returns true if the given task was found and removed. 888 * 889 * @hide 890 */ 891 public boolean removeTask(int taskId, int flags) 892 throws SecurityException { 893 try { 894 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 895 } catch (RemoteException e) { 896 // System dead, we will be dead too soon! 897 return false; 898 } 899 } 900 901 /** @hide */ 902 public static class TaskThumbnails implements Parcelable { 903 public Bitmap mainThumbnail; 904 905 public int numSubThumbbails; 906 907 /** @hide */ 908 public IThumbnailRetriever retriever; 909 910 public TaskThumbnails() { 911 } 912 913 public Bitmap getSubThumbnail(int index) { 914 try { 915 return retriever.getThumbnail(index); 916 } catch (RemoteException e) { 917 return null; 918 } 919 } 920 921 public int describeContents() { 922 return 0; 923 } 924 925 public void writeToParcel(Parcel dest, int flags) { 926 if (mainThumbnail != null) { 927 dest.writeInt(1); 928 mainThumbnail.writeToParcel(dest, 0); 929 } else { 930 dest.writeInt(0); 931 } 932 dest.writeInt(numSubThumbbails); 933 dest.writeStrongInterface(retriever); 934 } 935 936 public void readFromParcel(Parcel source) { 937 if (source.readInt() != 0) { 938 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 939 } else { 940 mainThumbnail = null; 941 } 942 numSubThumbbails = source.readInt(); 943 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 944 } 945 946 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 947 public TaskThumbnails createFromParcel(Parcel source) { 948 return new TaskThumbnails(source); 949 } 950 public TaskThumbnails[] newArray(int size) { 951 return new TaskThumbnails[size]; 952 } 953 }; 954 955 private TaskThumbnails(Parcel source) { 956 readFromParcel(source); 957 } 958 } 959 960 /** @hide */ 961 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 962 try { 963 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 964 } catch (RemoteException e) { 965 // System dead, we will be dead too soon! 966 return null; 967 } 968 } 969 970 /** @hide */ 971 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 972 try { 973 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 974 } catch (RemoteException e) { 975 // System dead, we will be dead too soon! 976 return null; 977 } 978 } 979 980 /** @hide */ 981 public boolean isInHomeStack(int taskId) { 982 try { 983 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 984 } catch (RemoteException e) { 985 // System dead, we will be dead too soon! 986 return false; 987 } 988 } 989 990 /** 991 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 992 * activity along with the task, so it is positioned immediately behind 993 * the task. 994 */ 995 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 996 997 /** 998 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 999 * user-instigated action, so the current activity will not receive a 1000 * hint that the user is leaving. 1001 */ 1002 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 1003 1004 /** 1005 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1006 * with a null options argument. 1007 * 1008 * @param taskId The identifier of the task to be moved, as found in 1009 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1010 * @param flags Additional operational flags, 0 or more of 1011 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1012 */ 1013 public void moveTaskToFront(int taskId, int flags) { 1014 moveTaskToFront(taskId, flags, null); 1015 } 1016 1017 /** 1018 * Ask that the task associated with a given task ID be moved to the 1019 * front of the stack, so it is now visible to the user. Requires that 1020 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1021 * or a SecurityException will be thrown. 1022 * 1023 * @param taskId The identifier of the task to be moved, as found in 1024 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1025 * @param flags Additional operational flags, 0 or more of 1026 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1027 * @param options Additional options for the operation, either null or 1028 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1029 * Context.startActivity(Intent, Bundle)}. 1030 */ 1031 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1032 try { 1033 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1034 } catch (RemoteException e) { 1035 // System dead, we will be dead too soon! 1036 } 1037 } 1038 1039 /** 1040 * Information you can retrieve about a particular Service that is 1041 * currently running in the system. 1042 */ 1043 public static class RunningServiceInfo implements Parcelable { 1044 /** 1045 * The service component. 1046 */ 1047 public ComponentName service; 1048 1049 /** 1050 * If non-zero, this is the process the service is running in. 1051 */ 1052 public int pid; 1053 1054 /** 1055 * The UID that owns this service. 1056 */ 1057 public int uid; 1058 1059 /** 1060 * The name of the process this service runs in. 1061 */ 1062 public String process; 1063 1064 /** 1065 * Set to true if the service has asked to run as a foreground process. 1066 */ 1067 public boolean foreground; 1068 1069 /** 1070 * The time when the service was first made active, either by someone 1071 * starting or binding to it. This 1072 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1073 */ 1074 public long activeSince; 1075 1076 /** 1077 * Set to true if this service has been explicitly started. 1078 */ 1079 public boolean started; 1080 1081 /** 1082 * Number of clients connected to the service. 1083 */ 1084 public int clientCount; 1085 1086 /** 1087 * Number of times the service's process has crashed while the service 1088 * is running. 1089 */ 1090 public int crashCount; 1091 1092 /** 1093 * The time when there was last activity in the service (either 1094 * explicit requests to start it or clients binding to it). This 1095 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1096 */ 1097 public long lastActivityTime; 1098 1099 /** 1100 * If non-zero, this service is not currently running, but scheduled to 1101 * restart at the given time. 1102 */ 1103 public long restarting; 1104 1105 /** 1106 * Bit for {@link #flags}: set if this service has been 1107 * explicitly started. 1108 */ 1109 public static final int FLAG_STARTED = 1<<0; 1110 1111 /** 1112 * Bit for {@link #flags}: set if the service has asked to 1113 * run as a foreground process. 1114 */ 1115 public static final int FLAG_FOREGROUND = 1<<1; 1116 1117 /** 1118 * Bit for {@link #flags): set if the service is running in a 1119 * core system process. 1120 */ 1121 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1122 1123 /** 1124 * Bit for {@link #flags): set if the service is running in a 1125 * persistent process. 1126 */ 1127 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1128 1129 /** 1130 * Running flags. 1131 */ 1132 public int flags; 1133 1134 /** 1135 * For special services that are bound to by system code, this is 1136 * the package that holds the binding. 1137 */ 1138 public String clientPackage; 1139 1140 /** 1141 * For special services that are bound to by system code, this is 1142 * a string resource providing a user-visible label for who the 1143 * client is. 1144 */ 1145 public int clientLabel; 1146 1147 public RunningServiceInfo() { 1148 } 1149 1150 public int describeContents() { 1151 return 0; 1152 } 1153 1154 public void writeToParcel(Parcel dest, int flags) { 1155 ComponentName.writeToParcel(service, dest); 1156 dest.writeInt(pid); 1157 dest.writeInt(uid); 1158 dest.writeString(process); 1159 dest.writeInt(foreground ? 1 : 0); 1160 dest.writeLong(activeSince); 1161 dest.writeInt(started ? 1 : 0); 1162 dest.writeInt(clientCount); 1163 dest.writeInt(crashCount); 1164 dest.writeLong(lastActivityTime); 1165 dest.writeLong(restarting); 1166 dest.writeInt(this.flags); 1167 dest.writeString(clientPackage); 1168 dest.writeInt(clientLabel); 1169 } 1170 1171 public void readFromParcel(Parcel source) { 1172 service = ComponentName.readFromParcel(source); 1173 pid = source.readInt(); 1174 uid = source.readInt(); 1175 process = source.readString(); 1176 foreground = source.readInt() != 0; 1177 activeSince = source.readLong(); 1178 started = source.readInt() != 0; 1179 clientCount = source.readInt(); 1180 crashCount = source.readInt(); 1181 lastActivityTime = source.readLong(); 1182 restarting = source.readLong(); 1183 flags = source.readInt(); 1184 clientPackage = source.readString(); 1185 clientLabel = source.readInt(); 1186 } 1187 1188 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1189 public RunningServiceInfo createFromParcel(Parcel source) { 1190 return new RunningServiceInfo(source); 1191 } 1192 public RunningServiceInfo[] newArray(int size) { 1193 return new RunningServiceInfo[size]; 1194 } 1195 }; 1196 1197 private RunningServiceInfo(Parcel source) { 1198 readFromParcel(source); 1199 } 1200 } 1201 1202 /** 1203 * Return a list of the services that are currently running. 1204 * 1205 * <p><b>Note: this method is only intended for debugging or implementing 1206 * service management type user interfaces.</b></p> 1207 * 1208 * @param maxNum The maximum number of entries to return in the list. The 1209 * actual number returned may be smaller, depending on how many services 1210 * are running. 1211 * 1212 * @return Returns a list of RunningServiceInfo records describing each of 1213 * the running tasks. 1214 */ 1215 public List<RunningServiceInfo> getRunningServices(int maxNum) 1216 throws SecurityException { 1217 try { 1218 return ActivityManagerNative.getDefault() 1219 .getServices(maxNum, 0); 1220 } catch (RemoteException e) { 1221 // System dead, we will be dead too soon! 1222 return null; 1223 } 1224 } 1225 1226 /** 1227 * Returns a PendingIntent you can start to show a control panel for the 1228 * given running service. If the service does not have a control panel, 1229 * null is returned. 1230 */ 1231 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1232 throws SecurityException { 1233 try { 1234 return ActivityManagerNative.getDefault() 1235 .getRunningServiceControlPanel(service); 1236 } catch (RemoteException e) { 1237 // System dead, we will be dead too soon! 1238 return null; 1239 } 1240 } 1241 1242 /** 1243 * Information you can retrieve about the available memory through 1244 * {@link ActivityManager#getMemoryInfo}. 1245 */ 1246 public static class MemoryInfo implements Parcelable { 1247 /** 1248 * The available memory on the system. This number should not 1249 * be considered absolute: due to the nature of the kernel, a significant 1250 * portion of this memory is actually in use and needed for the overall 1251 * system to run well. 1252 */ 1253 public long availMem; 1254 1255 /** 1256 * The total memory accessible by the kernel. This is basically the 1257 * RAM size of the device, not including below-kernel fixed allocations 1258 * like DMA buffers, RAM for the baseband CPU, etc. 1259 */ 1260 public long totalMem; 1261 1262 /** 1263 * The threshold of {@link #availMem} at which we consider memory to be 1264 * low and start killing background services and other non-extraneous 1265 * processes. 1266 */ 1267 public long threshold; 1268 1269 /** 1270 * Set to true if the system considers itself to currently be in a low 1271 * memory situation. 1272 */ 1273 public boolean lowMemory; 1274 1275 /** @hide */ 1276 public long hiddenAppThreshold; 1277 /** @hide */ 1278 public long secondaryServerThreshold; 1279 /** @hide */ 1280 public long visibleAppThreshold; 1281 /** @hide */ 1282 public long foregroundAppThreshold; 1283 1284 public MemoryInfo() { 1285 } 1286 1287 public int describeContents() { 1288 return 0; 1289 } 1290 1291 public void writeToParcel(Parcel dest, int flags) { 1292 dest.writeLong(availMem); 1293 dest.writeLong(totalMem); 1294 dest.writeLong(threshold); 1295 dest.writeInt(lowMemory ? 1 : 0); 1296 dest.writeLong(hiddenAppThreshold); 1297 dest.writeLong(secondaryServerThreshold); 1298 dest.writeLong(visibleAppThreshold); 1299 dest.writeLong(foregroundAppThreshold); 1300 } 1301 1302 public void readFromParcel(Parcel source) { 1303 availMem = source.readLong(); 1304 totalMem = source.readLong(); 1305 threshold = source.readLong(); 1306 lowMemory = source.readInt() != 0; 1307 hiddenAppThreshold = source.readLong(); 1308 secondaryServerThreshold = source.readLong(); 1309 visibleAppThreshold = source.readLong(); 1310 foregroundAppThreshold = source.readLong(); 1311 } 1312 1313 public static final Creator<MemoryInfo> CREATOR 1314 = new Creator<MemoryInfo>() { 1315 public MemoryInfo createFromParcel(Parcel source) { 1316 return new MemoryInfo(source); 1317 } 1318 public MemoryInfo[] newArray(int size) { 1319 return new MemoryInfo[size]; 1320 } 1321 }; 1322 1323 private MemoryInfo(Parcel source) { 1324 readFromParcel(source); 1325 } 1326 } 1327 1328 /** 1329 * Return general information about the memory state of the system. This 1330 * can be used to help decide how to manage your own memory, though note 1331 * that polling is not recommended and 1332 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1333 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1334 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1335 * level of your process as needed, which gives a better hint for how to 1336 * manage its memory. 1337 */ 1338 public void getMemoryInfo(MemoryInfo outInfo) { 1339 try { 1340 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1341 } catch (RemoteException e) { 1342 } 1343 } 1344 1345 /** 1346 * Information you can retrieve about an ActivityStack in the system. 1347 * @hide 1348 */ 1349 public static class StackInfo implements Parcelable { 1350 public int stackId; 1351 public Rect bounds = new Rect(); 1352 public int[] taskIds; 1353 public String[] taskNames; 1354 public int displayId; 1355 1356 @Override 1357 public int describeContents() { 1358 return 0; 1359 } 1360 1361 @Override 1362 public void writeToParcel(Parcel dest, int flags) { 1363 dest.writeInt(stackId); 1364 dest.writeInt(bounds.left); 1365 dest.writeInt(bounds.top); 1366 dest.writeInt(bounds.right); 1367 dest.writeInt(bounds.bottom); 1368 dest.writeIntArray(taskIds); 1369 dest.writeStringArray(taskNames); 1370 dest.writeInt(displayId); 1371 } 1372 1373 public void readFromParcel(Parcel source) { 1374 stackId = source.readInt(); 1375 bounds = new Rect( 1376 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1377 taskIds = source.createIntArray(); 1378 taskNames = source.createStringArray(); 1379 displayId = source.readInt(); 1380 } 1381 1382 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1383 @Override 1384 public StackInfo createFromParcel(Parcel source) { 1385 return new StackInfo(source); 1386 } 1387 @Override 1388 public StackInfo[] newArray(int size) { 1389 return new StackInfo[size]; 1390 } 1391 }; 1392 1393 public StackInfo() { 1394 } 1395 1396 private StackInfo(Parcel source) { 1397 readFromParcel(source); 1398 } 1399 1400 public String toString(String prefix) { 1401 StringBuilder sb = new StringBuilder(256); 1402 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1403 sb.append(" bounds="); sb.append(bounds.toShortString()); 1404 sb.append(" displayId="); sb.append(displayId); 1405 sb.append("\n"); 1406 prefix = prefix + " "; 1407 for (int i = 0; i < taskIds.length; ++i) { 1408 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1409 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1410 } 1411 return sb.toString(); 1412 } 1413 1414 @Override 1415 public String toString() { 1416 return toString(""); 1417 } 1418 } 1419 1420 /** 1421 * @hide 1422 */ 1423 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1424 try { 1425 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1426 observer, UserHandle.myUserId()); 1427 } catch (RemoteException e) { 1428 return false; 1429 } 1430 } 1431 1432 /** 1433 * Permits an application to erase its own data from disk. This is equivalent to 1434 * the user choosing to clear the app's data from within the device settings UI. It 1435 * erases all dynamic data associated with the app -- its private data and data in its 1436 * private area on external storage -- but does not remove the installed application 1437 * itself, nor any OBB files. 1438 * 1439 * @return {@code true} if the application successfully requested that the application's 1440 * data be erased; {@code false} otherwise. 1441 */ 1442 public boolean clearApplicationUserData() { 1443 return clearApplicationUserData(mContext.getPackageName(), null); 1444 } 1445 1446 /** 1447 * Information you can retrieve about any processes that are in an error condition. 1448 */ 1449 public static class ProcessErrorStateInfo implements Parcelable { 1450 /** 1451 * Condition codes 1452 */ 1453 public static final int NO_ERROR = 0; 1454 public static final int CRASHED = 1; 1455 public static final int NOT_RESPONDING = 2; 1456 1457 /** 1458 * The condition that the process is in. 1459 */ 1460 public int condition; 1461 1462 /** 1463 * The process name in which the crash or error occurred. 1464 */ 1465 public String processName; 1466 1467 /** 1468 * The pid of this process; 0 if none 1469 */ 1470 public int pid; 1471 1472 /** 1473 * The kernel user-ID that has been assigned to this process; 1474 * currently this is not a unique ID (multiple applications can have 1475 * the same uid). 1476 */ 1477 public int uid; 1478 1479 /** 1480 * The activity name associated with the error, if known. May be null. 1481 */ 1482 public String tag; 1483 1484 /** 1485 * A short message describing the error condition. 1486 */ 1487 public String shortMsg; 1488 1489 /** 1490 * A long message describing the error condition. 1491 */ 1492 public String longMsg; 1493 1494 /** 1495 * The stack trace where the error originated. May be null. 1496 */ 1497 public String stackTrace; 1498 1499 /** 1500 * to be deprecated: This value will always be null. 1501 */ 1502 public byte[] crashData = null; 1503 1504 public ProcessErrorStateInfo() { 1505 } 1506 1507 @Override 1508 public int describeContents() { 1509 return 0; 1510 } 1511 1512 @Override 1513 public void writeToParcel(Parcel dest, int flags) { 1514 dest.writeInt(condition); 1515 dest.writeString(processName); 1516 dest.writeInt(pid); 1517 dest.writeInt(uid); 1518 dest.writeString(tag); 1519 dest.writeString(shortMsg); 1520 dest.writeString(longMsg); 1521 dest.writeString(stackTrace); 1522 } 1523 1524 public void readFromParcel(Parcel source) { 1525 condition = source.readInt(); 1526 processName = source.readString(); 1527 pid = source.readInt(); 1528 uid = source.readInt(); 1529 tag = source.readString(); 1530 shortMsg = source.readString(); 1531 longMsg = source.readString(); 1532 stackTrace = source.readString(); 1533 } 1534 1535 public static final Creator<ProcessErrorStateInfo> CREATOR = 1536 new Creator<ProcessErrorStateInfo>() { 1537 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1538 return new ProcessErrorStateInfo(source); 1539 } 1540 public ProcessErrorStateInfo[] newArray(int size) { 1541 return new ProcessErrorStateInfo[size]; 1542 } 1543 }; 1544 1545 private ProcessErrorStateInfo(Parcel source) { 1546 readFromParcel(source); 1547 } 1548 } 1549 1550 /** 1551 * Returns a list of any processes that are currently in an error condition. The result 1552 * will be null if all processes are running properly at this time. 1553 * 1554 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1555 * current error conditions (it will not return an empty list). This list ordering is not 1556 * specified. 1557 */ 1558 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1559 try { 1560 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1561 } catch (RemoteException e) { 1562 return null; 1563 } 1564 } 1565 1566 /** 1567 * Information you can retrieve about a running process. 1568 */ 1569 public static class RunningAppProcessInfo implements Parcelable { 1570 /** 1571 * The name of the process that this object is associated with 1572 */ 1573 public String processName; 1574 1575 /** 1576 * The pid of this process; 0 if none 1577 */ 1578 public int pid; 1579 1580 /** 1581 * The user id of this process. 1582 */ 1583 public int uid; 1584 1585 /** 1586 * All packages that have been loaded into the process. 1587 */ 1588 public String pkgList[]; 1589 1590 /** 1591 * Constant for {@link #flags}: this is an app that is unable to 1592 * correctly save its state when going to the background, 1593 * so it can not be killed while in the background. 1594 * @hide 1595 */ 1596 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1597 1598 /** 1599 * Constant for {@link #flags}: this process is associated with a 1600 * persistent system app. 1601 * @hide 1602 */ 1603 public static final int FLAG_PERSISTENT = 1<<1; 1604 1605 /** 1606 * Constant for {@link #flags}: this process is associated with a 1607 * persistent system app. 1608 * @hide 1609 */ 1610 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1611 1612 /** 1613 * Flags of information. May be any of 1614 * {@link #FLAG_CANT_SAVE_STATE}. 1615 * @hide 1616 */ 1617 public int flags; 1618 1619 /** 1620 * Last memory trim level reported to the process: corresponds to 1621 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1622 * ComponentCallbacks2.onTrimMemory(int)}. 1623 */ 1624 public int lastTrimLevel; 1625 1626 /** 1627 * Constant for {@link #importance}: this is a persistent process. 1628 * Only used when reporting to process observers. 1629 * @hide 1630 */ 1631 public static final int IMPORTANCE_PERSISTENT = 50; 1632 1633 /** 1634 * Constant for {@link #importance}: this process is running the 1635 * foreground UI. 1636 */ 1637 public static final int IMPORTANCE_FOREGROUND = 100; 1638 1639 /** 1640 * Constant for {@link #importance}: this process is running something 1641 * that is actively visible to the user, though not in the immediate 1642 * foreground. 1643 */ 1644 public static final int IMPORTANCE_VISIBLE = 200; 1645 1646 /** 1647 * Constant for {@link #importance}: this process is running something 1648 * that is considered to be actively perceptible to the user. An 1649 * example would be an application performing background music playback. 1650 */ 1651 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1652 1653 /** 1654 * Constant for {@link #importance}: this process is running an 1655 * application that can not save its state, and thus can't be killed 1656 * while in the background. 1657 * @hide 1658 */ 1659 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1660 1661 /** 1662 * Constant for {@link #importance}: this process is contains services 1663 * that should remain running. 1664 */ 1665 public static final int IMPORTANCE_SERVICE = 300; 1666 1667 /** 1668 * Constant for {@link #importance}: this process process contains 1669 * background code that is expendable. 1670 */ 1671 public static final int IMPORTANCE_BACKGROUND = 400; 1672 1673 /** 1674 * Constant for {@link #importance}: this process is empty of any 1675 * actively running code. 1676 */ 1677 public static final int IMPORTANCE_EMPTY = 500; 1678 1679 /** 1680 * The relative importance level that the system places on this 1681 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1682 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1683 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1684 * constants are numbered so that "more important" values are always 1685 * smaller than "less important" values. 1686 */ 1687 public int importance; 1688 1689 /** 1690 * An additional ordering within a particular {@link #importance} 1691 * category, providing finer-grained information about the relative 1692 * utility of processes within a category. This number means nothing 1693 * except that a smaller values are more recently used (and thus 1694 * more important). Currently an LRU value is only maintained for 1695 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1696 * be maintained in the future. 1697 */ 1698 public int lru; 1699 1700 /** 1701 * Constant for {@link #importanceReasonCode}: nothing special has 1702 * been specified for the reason for this level. 1703 */ 1704 public static final int REASON_UNKNOWN = 0; 1705 1706 /** 1707 * Constant for {@link #importanceReasonCode}: one of the application's 1708 * content providers is being used by another process. The pid of 1709 * the client process is in {@link #importanceReasonPid} and the 1710 * target provider in this process is in 1711 * {@link #importanceReasonComponent}. 1712 */ 1713 public static final int REASON_PROVIDER_IN_USE = 1; 1714 1715 /** 1716 * Constant for {@link #importanceReasonCode}: one of the application's 1717 * content providers is being used by another process. The pid of 1718 * the client process is in {@link #importanceReasonPid} and the 1719 * target provider in this process is in 1720 * {@link #importanceReasonComponent}. 1721 */ 1722 public static final int REASON_SERVICE_IN_USE = 2; 1723 1724 /** 1725 * The reason for {@link #importance}, if any. 1726 */ 1727 public int importanceReasonCode; 1728 1729 /** 1730 * For the specified values of {@link #importanceReasonCode}, this 1731 * is the process ID of the other process that is a client of this 1732 * process. This will be 0 if no other process is using this one. 1733 */ 1734 public int importanceReasonPid; 1735 1736 /** 1737 * For the specified values of {@link #importanceReasonCode}, this 1738 * is the name of the component that is being used in this process. 1739 */ 1740 public ComponentName importanceReasonComponent; 1741 1742 /** 1743 * When {@link #importanceReasonPid} is non-0, this is the importance 1744 * of the other pid. @hide 1745 */ 1746 public int importanceReasonImportance; 1747 1748 public RunningAppProcessInfo() { 1749 importance = IMPORTANCE_FOREGROUND; 1750 importanceReasonCode = REASON_UNKNOWN; 1751 } 1752 1753 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1754 processName = pProcessName; 1755 pid = pPid; 1756 pkgList = pArr; 1757 } 1758 1759 public int describeContents() { 1760 return 0; 1761 } 1762 1763 public void writeToParcel(Parcel dest, int flags) { 1764 dest.writeString(processName); 1765 dest.writeInt(pid); 1766 dest.writeInt(uid); 1767 dest.writeStringArray(pkgList); 1768 dest.writeInt(this.flags); 1769 dest.writeInt(lastTrimLevel); 1770 dest.writeInt(importance); 1771 dest.writeInt(lru); 1772 dest.writeInt(importanceReasonCode); 1773 dest.writeInt(importanceReasonPid); 1774 ComponentName.writeToParcel(importanceReasonComponent, dest); 1775 dest.writeInt(importanceReasonImportance); 1776 } 1777 1778 public void readFromParcel(Parcel source) { 1779 processName = source.readString(); 1780 pid = source.readInt(); 1781 uid = source.readInt(); 1782 pkgList = source.readStringArray(); 1783 flags = source.readInt(); 1784 lastTrimLevel = source.readInt(); 1785 importance = source.readInt(); 1786 lru = source.readInt(); 1787 importanceReasonCode = source.readInt(); 1788 importanceReasonPid = source.readInt(); 1789 importanceReasonComponent = ComponentName.readFromParcel(source); 1790 importanceReasonImportance = source.readInt(); 1791 } 1792 1793 public static final Creator<RunningAppProcessInfo> CREATOR = 1794 new Creator<RunningAppProcessInfo>() { 1795 public RunningAppProcessInfo createFromParcel(Parcel source) { 1796 return new RunningAppProcessInfo(source); 1797 } 1798 public RunningAppProcessInfo[] newArray(int size) { 1799 return new RunningAppProcessInfo[size]; 1800 } 1801 }; 1802 1803 private RunningAppProcessInfo(Parcel source) { 1804 readFromParcel(source); 1805 } 1806 } 1807 1808 /** 1809 * Returns a list of application processes installed on external media 1810 * that are running on the device. 1811 * 1812 * <p><b>Note: this method is only intended for debugging or building 1813 * a user-facing process management UI.</b></p> 1814 * 1815 * @return Returns a list of ApplicationInfo records, or null if none 1816 * This list ordering is not specified. 1817 * @hide 1818 */ 1819 public List<ApplicationInfo> getRunningExternalApplications() { 1820 try { 1821 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1822 } catch (RemoteException e) { 1823 return null; 1824 } 1825 } 1826 1827 /** 1828 * Returns a list of application processes that are running on the device. 1829 * 1830 * <p><b>Note: this method is only intended for debugging or building 1831 * a user-facing process management UI.</b></p> 1832 * 1833 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1834 * running processes (it will not return an empty list). This list ordering is not 1835 * specified. 1836 */ 1837 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1838 try { 1839 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1840 } catch (RemoteException e) { 1841 return null; 1842 } 1843 } 1844 1845 /** 1846 * Return global memory state information for the calling process. This 1847 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 1848 * only fields that will be filled in are 1849 * {@link RunningAppProcessInfo#pid}, 1850 * {@link RunningAppProcessInfo#uid}, 1851 * {@link RunningAppProcessInfo#lastTrimLevel}, 1852 * {@link RunningAppProcessInfo#importance}, 1853 * {@link RunningAppProcessInfo#lru}, and 1854 * {@link RunningAppProcessInfo#importanceReasonCode}. 1855 */ 1856 static public void getMyMemoryState(RunningAppProcessInfo outState) { 1857 try { 1858 ActivityManagerNative.getDefault().getMyMemoryState(outState); 1859 } catch (RemoteException e) { 1860 } 1861 } 1862 1863 /** 1864 * Return information about the memory usage of one or more processes. 1865 * 1866 * <p><b>Note: this method is only intended for debugging or building 1867 * a user-facing process management UI.</b></p> 1868 * 1869 * @param pids The pids of the processes whose memory usage is to be 1870 * retrieved. 1871 * @return Returns an array of memory information, one for each 1872 * requested pid. 1873 */ 1874 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1875 try { 1876 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1877 } catch (RemoteException e) { 1878 return null; 1879 } 1880 } 1881 1882 /** 1883 * @deprecated This is now just a wrapper for 1884 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1885 * is no longer available to applications because it allows them to 1886 * break other applications by removing their alarms, stopping their 1887 * services, etc. 1888 */ 1889 @Deprecated 1890 public void restartPackage(String packageName) { 1891 killBackgroundProcesses(packageName); 1892 } 1893 1894 /** 1895 * Have the system immediately kill all background processes associated 1896 * with the given package. This is the same as the kernel killing those 1897 * processes to reclaim memory; the system will take care of restarting 1898 * these processes in the future as needed. 1899 * 1900 * <p>You must hold the permission 1901 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1902 * call this method. 1903 * 1904 * @param packageName The name of the package whose processes are to 1905 * be killed. 1906 */ 1907 public void killBackgroundProcesses(String packageName) { 1908 try { 1909 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 1910 UserHandle.myUserId()); 1911 } catch (RemoteException e) { 1912 } 1913 } 1914 1915 /** 1916 * Have the system perform a force stop of everything associated with 1917 * the given application package. All processes that share its uid 1918 * will be killed, all services it has running stopped, all activities 1919 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1920 * broadcast will be sent, so that any of its registered alarms can 1921 * be stopped, notifications removed, etc. 1922 * 1923 * <p>You must hold the permission 1924 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1925 * call this method. 1926 * 1927 * @param packageName The name of the package to be stopped. 1928 * 1929 * @hide This is not available to third party applications due to 1930 * it allowing them to break other applications by stopping their 1931 * services, removing their alarms, etc. 1932 */ 1933 public void forceStopPackage(String packageName) { 1934 try { 1935 ActivityManagerNative.getDefault().forceStopPackage(packageName, 1936 UserHandle.myUserId()); 1937 } catch (RemoteException e) { 1938 } 1939 } 1940 1941 /** 1942 * Get the device configuration attributes. 1943 */ 1944 public ConfigurationInfo getDeviceConfigurationInfo() { 1945 try { 1946 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 1947 } catch (RemoteException e) { 1948 } 1949 return null; 1950 } 1951 1952 /** 1953 * Get the preferred density of icons for the launcher. This is used when 1954 * custom drawables are created (e.g., for shortcuts). 1955 * 1956 * @return density in terms of DPI 1957 */ 1958 public int getLauncherLargeIconDensity() { 1959 final Resources res = mContext.getResources(); 1960 final int density = res.getDisplayMetrics().densityDpi; 1961 final int sw = res.getConfiguration().smallestScreenWidthDp; 1962 1963 if (sw < 600) { 1964 // Smaller than approx 7" tablets, use the regular icon size. 1965 return density; 1966 } 1967 1968 switch (density) { 1969 case DisplayMetrics.DENSITY_LOW: 1970 return DisplayMetrics.DENSITY_MEDIUM; 1971 case DisplayMetrics.DENSITY_MEDIUM: 1972 return DisplayMetrics.DENSITY_HIGH; 1973 case DisplayMetrics.DENSITY_TV: 1974 return DisplayMetrics.DENSITY_XHIGH; 1975 case DisplayMetrics.DENSITY_HIGH: 1976 return DisplayMetrics.DENSITY_XHIGH; 1977 case DisplayMetrics.DENSITY_XHIGH: 1978 return DisplayMetrics.DENSITY_XXHIGH; 1979 case DisplayMetrics.DENSITY_XXHIGH: 1980 return DisplayMetrics.DENSITY_XHIGH * 2; 1981 default: 1982 // The density is some abnormal value. Return some other 1983 // abnormal value that is a reasonable scaling of it. 1984 return (int)((density*1.5f)+.5f); 1985 } 1986 } 1987 1988 /** 1989 * Get the preferred launcher icon size. This is used when custom drawables 1990 * are created (e.g., for shortcuts). 1991 * 1992 * @return dimensions of square icons in terms of pixels 1993 */ 1994 public int getLauncherLargeIconSize() { 1995 return getLauncherLargeIconSizeInner(mContext); 1996 } 1997 1998 static int getLauncherLargeIconSizeInner(Context context) { 1999 final Resources res = context.getResources(); 2000 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 2001 final int sw = res.getConfiguration().smallestScreenWidthDp; 2002 2003 if (sw < 600) { 2004 // Smaller than approx 7" tablets, use the regular icon size. 2005 return size; 2006 } 2007 2008 final int density = res.getDisplayMetrics().densityDpi; 2009 2010 switch (density) { 2011 case DisplayMetrics.DENSITY_LOW: 2012 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2013 case DisplayMetrics.DENSITY_MEDIUM: 2014 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2015 case DisplayMetrics.DENSITY_TV: 2016 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2017 case DisplayMetrics.DENSITY_HIGH: 2018 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2019 case DisplayMetrics.DENSITY_XHIGH: 2020 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2021 case DisplayMetrics.DENSITY_XXHIGH: 2022 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2023 default: 2024 // The density is some abnormal value. Return some other 2025 // abnormal value that is a reasonable scaling of it. 2026 return (int)((size*1.5f) + .5f); 2027 } 2028 } 2029 2030 /** 2031 * Returns "true" if the user interface is currently being messed with 2032 * by a monkey. 2033 */ 2034 public static boolean isUserAMonkey() { 2035 try { 2036 return ActivityManagerNative.getDefault().isUserAMonkey(); 2037 } catch (RemoteException e) { 2038 } 2039 return false; 2040 } 2041 2042 /** 2043 * Returns "true" if device is running in a test harness. 2044 */ 2045 public static boolean isRunningInTestHarness() { 2046 return SystemProperties.getBoolean("ro.test_harness", false); 2047 } 2048 2049 /** 2050 * Returns the launch count of each installed package. 2051 * 2052 * @hide 2053 */ 2054 public Map<String, Integer> getAllPackageLaunchCounts() { 2055 try { 2056 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2057 ServiceManager.getService("usagestats")); 2058 if (usageStatsService == null) { 2059 return new HashMap<String, Integer>(); 2060 } 2061 2062 PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats(); 2063 if (allPkgUsageStats == null) { 2064 return new HashMap<String, Integer>(); 2065 } 2066 2067 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2068 for (PkgUsageStats pkgUsageStats : allPkgUsageStats) { 2069 launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount); 2070 } 2071 2072 return launchCounts; 2073 } catch (RemoteException e) { 2074 Log.w(TAG, "Could not query launch counts", e); 2075 return new HashMap<String, Integer>(); 2076 } 2077 } 2078 2079 /** @hide */ 2080 public static int checkComponentPermission(String permission, int uid, 2081 int owningUid, boolean exported) { 2082 // Root, system server get to do everything. 2083 if (uid == 0 || uid == Process.SYSTEM_UID) { 2084 return PackageManager.PERMISSION_GRANTED; 2085 } 2086 // Isolated processes don't get any permissions. 2087 if (UserHandle.isIsolated(uid)) { 2088 return PackageManager.PERMISSION_DENIED; 2089 } 2090 // If there is a uid that owns whatever is being accessed, it has 2091 // blanket access to it regardless of the permissions it requires. 2092 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2093 return PackageManager.PERMISSION_GRANTED; 2094 } 2095 // If the target is not exported, then nobody else can get to it. 2096 if (!exported) { 2097 /* 2098 RuntimeException here = new RuntimeException("here"); 2099 here.fillInStackTrace(); 2100 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2101 here); 2102 */ 2103 return PackageManager.PERMISSION_DENIED; 2104 } 2105 if (permission == null) { 2106 return PackageManager.PERMISSION_GRANTED; 2107 } 2108 try { 2109 return AppGlobals.getPackageManager() 2110 .checkUidPermission(permission, uid); 2111 } catch (RemoteException e) { 2112 // Should never happen, but if it does... deny! 2113 Slog.e(TAG, "PackageManager is dead?!?", e); 2114 } 2115 return PackageManager.PERMISSION_DENIED; 2116 } 2117 2118 /** @hide */ 2119 public static int checkUidPermission(String permission, int uid) { 2120 try { 2121 return AppGlobals.getPackageManager() 2122 .checkUidPermission(permission, uid); 2123 } catch (RemoteException e) { 2124 // Should never happen, but if it does... deny! 2125 Slog.e(TAG, "PackageManager is dead?!?", e); 2126 } 2127 return PackageManager.PERMISSION_DENIED; 2128 } 2129 2130 /** 2131 * @hide 2132 * Helper for dealing with incoming user arguments to system service calls. 2133 * Takes care of checking permissions and converting USER_CURRENT to the 2134 * actual current user. 2135 * 2136 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2137 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2138 * @param userId The user id argument supplied by the caller -- this is the user 2139 * they want to run as. 2140 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2141 * to get a USER_ALL returned and deal with it correctly. If false, 2142 * an exception will be thrown if USER_ALL is supplied. 2143 * @param requireFull If true, the caller must hold 2144 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2145 * different user than their current process; otherwise they must hold 2146 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2147 * @param name Optional textual name of the incoming call; only for generating error messages. 2148 * @param callerPackage Optional package name of caller; only for error messages. 2149 * 2150 * @return Returns the user ID that the call should run as. Will always be a concrete 2151 * user number, unless <var>allowAll</var> is true in which case it could also be 2152 * USER_ALL. 2153 */ 2154 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2155 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2156 if (UserHandle.getUserId(callingUid) == userId) { 2157 return userId; 2158 } 2159 try { 2160 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2161 callingUid, userId, allowAll, requireFull, name, callerPackage); 2162 } catch (RemoteException e) { 2163 throw new SecurityException("Failed calling activity manager", e); 2164 } 2165 } 2166 2167 /** @hide */ 2168 public static int getCurrentUser() { 2169 UserInfo ui; 2170 try { 2171 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2172 return ui != null ? ui.id : 0; 2173 } catch (RemoteException e) { 2174 return 0; 2175 } 2176 } 2177 2178 /** 2179 * Returns the usage statistics of each installed package. 2180 * 2181 * @hide 2182 */ 2183 public PkgUsageStats[] getAllPackageUsageStats() { 2184 try { 2185 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2186 ServiceManager.getService("usagestats")); 2187 if (usageStatsService != null) { 2188 return usageStatsService.getAllPkgUsageStats(); 2189 } 2190 } catch (RemoteException e) { 2191 Log.w(TAG, "Could not query usage stats", e); 2192 } 2193 return new PkgUsageStats[0]; 2194 } 2195 2196 /** 2197 * @param userid the user's id. Zero indicates the default user 2198 * @hide 2199 */ 2200 public boolean switchUser(int userid) { 2201 try { 2202 return ActivityManagerNative.getDefault().switchUser(userid); 2203 } catch (RemoteException e) { 2204 return false; 2205 } 2206 } 2207 2208 /** 2209 * Return whether the given user is actively running. This means that 2210 * the user is in the "started" state, not "stopped" -- it is currently 2211 * allowed to run code through scheduled alarms, receiving broadcasts, 2212 * etc. A started user may be either the current foreground user or a 2213 * background user; the result here does not distinguish between the two. 2214 * @param userid the user's id. Zero indicates the default user. 2215 * @hide 2216 */ 2217 public boolean isUserRunning(int userid) { 2218 try { 2219 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2220 } catch (RemoteException e) { 2221 return false; 2222 } 2223 } 2224 2225 /** 2226 * Perform a system dump of various state associated with the given application 2227 * package name. This call blocks while the dump is being performed, so should 2228 * not be done on a UI thread. The data will be written to the given file 2229 * descriptor as text. An application must hold the 2230 * {@link android.Manifest.permission#DUMP} permission to make this call. 2231 * @param fd The file descriptor that the dump should be written to. The file 2232 * descriptor is <em>not</em> closed by this function; the caller continues to 2233 * own it. 2234 * @param packageName The name of the package that is to be dumped. 2235 */ 2236 public void dumpPackageState(FileDescriptor fd, String packageName) { 2237 dumpPackageStateStatic(fd, packageName); 2238 } 2239 2240 /** 2241 * @hide 2242 */ 2243 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2244 FileOutputStream fout = new FileOutputStream(fd); 2245 PrintWriter pw = new FastPrintWriter(fout); 2246 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2247 "-a", "package", packageName }); 2248 pw.println(); 2249 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2250 pw.println(); 2251 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2252 pw.println(); 2253 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2254 pw.println(); 2255 dumpService(pw, fd, "package", new String[] { packageName }); 2256 pw.println(); 2257 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2258 pw.flush(); 2259 } 2260 2261 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2262 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2263 IBinder service = ServiceManager.checkService(name); 2264 if (service == null) { 2265 pw.println(" (Service not found)"); 2266 return; 2267 } 2268 TransferPipe tp = null; 2269 try { 2270 pw.flush(); 2271 tp = new TransferPipe(); 2272 tp.setBufferPrefix(" "); 2273 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2274 tp.go(fd); 2275 } catch (Throwable e) { 2276 if (tp != null) { 2277 tp.kill(); 2278 } 2279 pw.println("Failure dumping service:"); 2280 e.printStackTrace(pw); 2281 } 2282 } 2283 2284 /** 2285 * @hide 2286 */ 2287 public void startLockTaskMode(int taskId) { 2288 try { 2289 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2290 } catch (RemoteException e) { 2291 } 2292 } 2293 2294 /** 2295 * @hide 2296 */ 2297 public void stopLockTaskMode() { 2298 try { 2299 ActivityManagerNative.getDefault().stopLockTaskMode(); 2300 } catch (RemoteException e) { 2301 } 2302 } 2303 2304 /** 2305 * @hide 2306 */ 2307 public boolean isInLockTaskMode() { 2308 try { 2309 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2310 } catch (RemoteException e) { 2311 return false; 2312 } 2313 } 2314} 2315