ActivityManager.java revision e22b3b143240f0f18e3d6d3c06686ad3c23b131b
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.TransferPipe; 24import com.android.internal.util.FastPrintWriter; 25 26import android.content.ComponentName; 27import android.content.Context; 28import android.content.Intent; 29import android.content.pm.ApplicationInfo; 30import android.content.pm.ConfigurationInfo; 31import android.content.pm.IPackageDataObserver; 32import android.content.pm.PackageManager; 33import android.content.pm.UserInfo; 34import android.content.res.Resources; 35import android.graphics.Bitmap; 36import android.graphics.Rect; 37import android.os.Bundle; 38import android.os.Debug; 39import android.os.Handler; 40import android.os.Parcel; 41import android.os.Parcelable; 42import android.os.Process; 43import android.os.RemoteException; 44import android.os.ServiceManager; 45import android.os.SystemProperties; 46import android.os.UserHandle; 47import android.text.TextUtils; 48import android.util.DisplayMetrics; 49import android.util.Log; 50import android.util.Slog; 51 52import java.io.FileDescriptor; 53import java.io.FileOutputStream; 54import java.io.PrintWriter; 55import java.util.HashMap; 56import java.util.List; 57import java.util.Map; 58 59/** 60 * Interact with the overall activities running in the system. 61 */ 62public class ActivityManager { 63 private static String TAG = "ActivityManager"; 64 private static boolean localLOGV = false; 65 66 private final Context mContext; 67 private final Handler mHandler; 68 69 /** 70 * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code 71 * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be 72 * uninstalled in lieu of the declaring one. The package named here must be 73 * signed with the same certificate as the one declaring the {@code <meta-data>}. 74 */ 75 public static final String META_HOME_ALTERNATE = "android.app.home.alternate"; 76 77 /** 78 * Result for IActivityManager.startActivity: trying to start an activity under voice 79 * control when that activity does not support the VOICE category. 80 * @hide 81 */ 82 public static final int START_NOT_VOICE_COMPATIBLE = -7; 83 84 /** 85 * Result for IActivityManager.startActivity: an error where the 86 * start had to be canceled. 87 * @hide 88 */ 89 public static final int START_CANCELED = -6; 90 91 /** 92 * Result for IActivityManager.startActivity: an error where the 93 * thing being started is not an activity. 94 * @hide 95 */ 96 public static final int START_NOT_ACTIVITY = -5; 97 98 /** 99 * Result for IActivityManager.startActivity: an error where the 100 * caller does not have permission to start the activity. 101 * @hide 102 */ 103 public static final int START_PERMISSION_DENIED = -4; 104 105 /** 106 * Result for IActivityManager.startActivity: an error where the 107 * caller has requested both to forward a result and to receive 108 * a result. 109 * @hide 110 */ 111 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 112 113 /** 114 * Result for IActivityManager.startActivity: an error where the 115 * requested class is not found. 116 * @hide 117 */ 118 public static final int START_CLASS_NOT_FOUND = -2; 119 120 /** 121 * Result for IActivityManager.startActivity: an error where the 122 * given Intent could not be resolved to an activity. 123 * @hide 124 */ 125 public static final int START_INTENT_NOT_RESOLVED = -1; 126 127 /** 128 * Result for IActivityManaqer.startActivity: the activity was started 129 * successfully as normal. 130 * @hide 131 */ 132 public static final int START_SUCCESS = 0; 133 134 /** 135 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 136 * be executed if it is the recipient, and that is indeed the case. 137 * @hide 138 */ 139 public static final int START_RETURN_INTENT_TO_CALLER = 1; 140 141 /** 142 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 143 * a task was simply brought to the foreground. 144 * @hide 145 */ 146 public static final int START_TASK_TO_FRONT = 2; 147 148 /** 149 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 150 * the given Intent was given to the existing top activity. 151 * @hide 152 */ 153 public static final int START_DELIVERED_TO_TOP = 3; 154 155 /** 156 * Result for IActivityManaqer.startActivity: request was canceled because 157 * app switches are temporarily canceled to ensure the user's last request 158 * (such as pressing home) is performed. 159 * @hide 160 */ 161 public static final int START_SWITCHES_CANCELED = 4; 162 163 /** 164 * Result for IActivityManaqer.startActivity: a new activity was attempted to be started 165 * while in Lock Task Mode. 166 * @hide 167 */ 168 public static final int START_RETURN_LOCK_TASK_MODE_VIOLATION = 5; 169 170 /** 171 * Flag for IActivityManaqer.startActivity: do special start mode where 172 * a new activity is launched only if it is needed. 173 * @hide 174 */ 175 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 176 177 /** 178 * Flag for IActivityManaqer.startActivity: launch the app for 179 * debugging. 180 * @hide 181 */ 182 public static final int START_FLAG_DEBUG = 1<<1; 183 184 /** 185 * Flag for IActivityManaqer.startActivity: launch the app for 186 * OpenGL tracing. 187 * @hide 188 */ 189 public static final int START_FLAG_OPENGL_TRACES = 1<<2; 190 191 /** 192 * Flag for IActivityManaqer.startActivity: if the app is being 193 * launched for profiling, automatically stop the profiler once done. 194 * @hide 195 */ 196 public static final int START_FLAG_AUTO_STOP_PROFILER = 1<<3; 197 198 /** 199 * Result for IActivityManaqer.broadcastIntent: success! 200 * @hide 201 */ 202 public static final int BROADCAST_SUCCESS = 0; 203 204 /** 205 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 206 * a sticky intent without appropriate permission. 207 * @hide 208 */ 209 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 210 211 /** 212 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 213 * for a sendBroadcast operation. 214 * @hide 215 */ 216 public static final int INTENT_SENDER_BROADCAST = 1; 217 218 /** 219 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 220 * for a startActivity operation. 221 * @hide 222 */ 223 public static final int INTENT_SENDER_ACTIVITY = 2; 224 225 /** 226 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 227 * for an activity result operation. 228 * @hide 229 */ 230 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 231 232 /** 233 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 234 * for a startService operation. 235 * @hide 236 */ 237 public static final int INTENT_SENDER_SERVICE = 4; 238 239 /** @hide User operation call: success! */ 240 public static final int USER_OP_SUCCESS = 0; 241 242 /** @hide User operation call: given user id is not known. */ 243 public static final int USER_OP_UNKNOWN_USER = -1; 244 245 /** @hide User operation call: given user id is the current user, can't be stopped. */ 246 public static final int USER_OP_IS_CURRENT = -2; 247 248 /** @hide Process is a persistent system process. */ 249 public static final int PROCESS_STATE_PERSISTENT = 0; 250 251 /** @hide Process is a persistent system process and is doing UI. */ 252 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 253 254 /** @hide Process is hosting the current top activities. Note that this covers 255 * all activities that are visible to the user. */ 256 public static final int PROCESS_STATE_TOP = 2; 257 258 /** @hide Process is important to the user, and something they are aware of. */ 259 public static final int PROCESS_STATE_IMPORTANT_FOREGROUND = 3; 260 261 /** @hide Process is important to the user, but not something they are aware of. */ 262 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 4; 263 264 /** @hide Process is in the background running a backup/restore operation. */ 265 public static final int PROCESS_STATE_BACKUP = 5; 266 267 /** @hide Process is in the background, but it can't restore its state so we want 268 * to try to avoid killing it. */ 269 public static final int PROCESS_STATE_HEAVY_WEIGHT = 6; 270 271 /** @hide Process is in the background running a service. Unlike oom_adj, this level 272 * is used for both the normal running in background state and the executing 273 * operations state. */ 274 public static final int PROCESS_STATE_SERVICE = 7; 275 276 /** @hide Process is in the background running a receiver. Note that from the 277 * perspective of oom_adj receivers run at a higher foreground level, but for our 278 * prioritization here that is not necessary and putting them below services means 279 * many fewer changes in some process states as they receive broadcasts. */ 280 public static final int PROCESS_STATE_RECEIVER = 8; 281 282 /** @hide Process is in the background but hosts the home activity. */ 283 public static final int PROCESS_STATE_HOME = 9; 284 285 /** @hide Process is in the background but hosts the last shown activity. */ 286 public static final int PROCESS_STATE_LAST_ACTIVITY = 10; 287 288 /** @hide Process is being cached for later use and contains activities. */ 289 public static final int PROCESS_STATE_CACHED_ACTIVITY = 11; 290 291 /** @hide Process is being cached for later use and is a client of another cached 292 * process that contains activities. */ 293 public static final int PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 12; 294 295 /** @hide Process is being cached for later use and is empty. */ 296 public static final int PROCESS_STATE_CACHED_EMPTY = 13; 297 298 /*package*/ ActivityManager(Context context, Handler handler) { 299 mContext = context; 300 mHandler = handler; 301 } 302 303 /** 304 * Screen compatibility mode: the application most always run in 305 * compatibility mode. 306 * @hide 307 */ 308 public static final int COMPAT_MODE_ALWAYS = -1; 309 310 /** 311 * Screen compatibility mode: the application can never run in 312 * compatibility mode. 313 * @hide 314 */ 315 public static final int COMPAT_MODE_NEVER = -2; 316 317 /** 318 * Screen compatibility mode: unknown. 319 * @hide 320 */ 321 public static final int COMPAT_MODE_UNKNOWN = -3; 322 323 /** 324 * Screen compatibility mode: the application currently has compatibility 325 * mode disabled. 326 * @hide 327 */ 328 public static final int COMPAT_MODE_DISABLED = 0; 329 330 /** 331 * Screen compatibility mode: the application currently has compatibility 332 * mode enabled. 333 * @hide 334 */ 335 public static final int COMPAT_MODE_ENABLED = 1; 336 337 /** 338 * Screen compatibility mode: request to toggle the application's 339 * compatibility mode. 340 * @hide 341 */ 342 public static final int COMPAT_MODE_TOGGLE = 2; 343 344 /** @hide */ 345 public int getFrontActivityScreenCompatMode() { 346 try { 347 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 348 } catch (RemoteException e) { 349 // System dead, we will be dead too soon! 350 return 0; 351 } 352 } 353 354 /** @hide */ 355 public void setFrontActivityScreenCompatMode(int mode) { 356 try { 357 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 358 } catch (RemoteException e) { 359 // System dead, we will be dead too soon! 360 } 361 } 362 363 /** @hide */ 364 public int getPackageScreenCompatMode(String packageName) { 365 try { 366 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 367 } catch (RemoteException e) { 368 // System dead, we will be dead too soon! 369 return 0; 370 } 371 } 372 373 /** @hide */ 374 public void setPackageScreenCompatMode(String packageName, int mode) { 375 try { 376 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 377 } catch (RemoteException e) { 378 // System dead, we will be dead too soon! 379 } 380 } 381 382 /** @hide */ 383 public boolean getPackageAskScreenCompat(String packageName) { 384 try { 385 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 386 } catch (RemoteException e) { 387 // System dead, we will be dead too soon! 388 return false; 389 } 390 } 391 392 /** @hide */ 393 public void setPackageAskScreenCompat(String packageName, boolean ask) { 394 try { 395 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 396 } catch (RemoteException e) { 397 // System dead, we will be dead too soon! 398 } 399 } 400 401 /** 402 * Return the approximate per-application memory class of the current 403 * device. This gives you an idea of how hard a memory limit you should 404 * impose on your application to let the overall system work best. The 405 * returned value is in megabytes; the baseline Android memory class is 406 * 16 (which happens to be the Java heap limit of those devices); some 407 * device with more memory may return 24 or even higher numbers. 408 */ 409 public int getMemoryClass() { 410 return staticGetMemoryClass(); 411 } 412 413 /** @hide */ 414 static public int staticGetMemoryClass() { 415 // Really brain dead right now -- just take this from the configured 416 // vm heap size, and assume it is in megabytes and thus ends with "m". 417 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 418 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 419 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 420 } 421 return staticGetLargeMemoryClass(); 422 } 423 424 /** 425 * Return the approximate per-application memory class of the current 426 * device when an application is running with a large heap. This is the 427 * space available for memory-intensive applications; most applications 428 * should not need this amount of memory, and should instead stay with the 429 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 430 * This may be the same size as {@link #getMemoryClass()} on memory 431 * constrained devices, or it may be significantly larger on devices with 432 * a large amount of available RAM. 433 * 434 * <p>The is the size of the application's Dalvik heap if it has 435 * specified <code>android:largeHeap="true"</code> in its manifest. 436 */ 437 public int getLargeMemoryClass() { 438 return staticGetLargeMemoryClass(); 439 } 440 441 /** @hide */ 442 static public int staticGetLargeMemoryClass() { 443 // Really brain dead right now -- just take this from the configured 444 // vm heap size, and assume it is in megabytes and thus ends with "m". 445 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 446 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 447 } 448 449 /** 450 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 451 * is ultimately up to the device configuration, but currently it generally means 452 * something in the class of a 512MB device with about a 800x480 or less screen. 453 * This is mostly intended to be used by apps to determine whether they should turn 454 * off certain features that require more RAM. 455 */ 456 public boolean isLowRamDevice() { 457 return isLowRamDeviceStatic(); 458 } 459 460 /** @hide */ 461 public static boolean isLowRamDeviceStatic() { 462 return "true".equals(SystemProperties.get("ro.config.low_ram", "false")); 463 } 464 465 /** 466 * Used by persistent processes to determine if they are running on a 467 * higher-end device so should be okay using hardware drawing acceleration 468 * (which tends to consume a lot more RAM). 469 * @hide 470 */ 471 static public boolean isHighEndGfx() { 472 return !isLowRamDeviceStatic() && 473 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 474 } 475 476 /** 477 * Information you can set and retrieve about the current activity within Recents. 478 */ 479 public static class RecentsActivityValues implements Parcelable { 480 public CharSequence label; 481 public Bitmap icon; 482 public int colorPrimary; 483 484 public RecentsActivityValues(RecentsActivityValues values) { 485 copyFrom(values); 486 } 487 488 /** 489 * Creates the RecentsActivityValues to the specified values. 490 * 491 * @param label A label and description of the current state of this activity. 492 * @param icon An icon that represents the current state of this activity. 493 * @param color A color to override the theme's primary color. 494 */ 495 public RecentsActivityValues(CharSequence label, Bitmap icon, int color) { 496 this.label = label; 497 this.icon = icon; 498 this.colorPrimary = color; 499 } 500 501 /** 502 * Creates the RecentsActivityValues to the specified values. 503 * 504 * @param label A label and description of the current state of this activity. 505 * @param icon An icon that represents the current state of this activity. 506 */ 507 public RecentsActivityValues(CharSequence label, Bitmap icon) { 508 this(label, icon, 0); 509 } 510 511 /** 512 * Creates the RecentsActivityValues to the specified values. 513 * 514 * @param label A label and description of the current state of this activity. 515 */ 516 public RecentsActivityValues(CharSequence label) { 517 this(label, null, 0); 518 } 519 520 public RecentsActivityValues() { 521 this(null, null, 0); 522 } 523 524 private RecentsActivityValues(Parcel source) { 525 readFromParcel(source); 526 } 527 528 /** 529 * Do a shallow copy of another set of activity values. 530 * @hide 531 */ 532 public void copyFrom(RecentsActivityValues v) { 533 if (v != null) { 534 label = v.label; 535 icon = v.icon; 536 colorPrimary = v.colorPrimary; 537 } 538 } 539 540 @Override 541 public int describeContents() { 542 return 0; 543 } 544 545 @Override 546 public void writeToParcel(Parcel dest, int flags) { 547 TextUtils.writeToParcel(label, dest, 548 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 549 if (icon == null) { 550 dest.writeInt(0); 551 } else { 552 dest.writeInt(1); 553 icon.writeToParcel(dest, 0); 554 } 555 dest.writeInt(colorPrimary); 556 } 557 558 public void readFromParcel(Parcel source) { 559 label = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 560 icon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 561 colorPrimary = source.readInt(); 562 } 563 564 public static final Creator<RecentsActivityValues> CREATOR 565 = new Creator<RecentsActivityValues>() { 566 public RecentsActivityValues createFromParcel(Parcel source) { 567 return new RecentsActivityValues(source); 568 } 569 public RecentsActivityValues[] newArray(int size) { 570 return new RecentsActivityValues[size]; 571 } 572 }; 573 574 @Override 575 public String toString() { 576 return "RecentsActivityValues Label: " + label + " Icon: " + icon + 577 " colorPrimary: " + colorPrimary; 578 } 579 } 580 581 /** 582 * Information you can retrieve about tasks that the user has most recently 583 * started or visited. 584 */ 585 public static class RecentTaskInfo implements Parcelable { 586 /** 587 * If this task is currently running, this is the identifier for it. 588 * If it is not running, this will be -1. 589 */ 590 public int id; 591 592 /** 593 * The true identifier of this task, valid even if it is not running. 594 */ 595 public int persistentId; 596 597 /** 598 * The original Intent used to launch the task. You can use this 599 * Intent to re-launch the task (if it is no longer running) or bring 600 * the current task to the front. 601 */ 602 public Intent baseIntent; 603 604 /** 605 * If this task was started from an alias, this is the actual 606 * activity component that was initially started; the component of 607 * the baseIntent in this case is the name of the actual activity 608 * implementation that the alias referred to. Otherwise, this is null. 609 */ 610 public ComponentName origActivity; 611 612 /** 613 * Description of the task's last state. 614 */ 615 public CharSequence description; 616 617 /** 618 * The id of the ActivityStack this Task was on most recently. 619 * @hide 620 */ 621 public int stackId; 622 623 /** 624 * The id of the user the task was running as. 625 * @hide 626 */ 627 public int userId; 628 629 /** 630 * The recent activity values for the highest activity in the stack to have set the values. 631 * {@link Activity#setRecentsActivityValues(android.app.ActivityManager.RecentsActivityValues)}. 632 */ 633 public RecentsActivityValues activityValues; 634 635 public RecentTaskInfo() { 636 } 637 638 @Override 639 public int describeContents() { 640 return 0; 641 } 642 643 @Override 644 public void writeToParcel(Parcel dest, int flags) { 645 dest.writeInt(id); 646 dest.writeInt(persistentId); 647 if (baseIntent != null) { 648 dest.writeInt(1); 649 baseIntent.writeToParcel(dest, 0); 650 } else { 651 dest.writeInt(0); 652 } 653 ComponentName.writeToParcel(origActivity, dest); 654 TextUtils.writeToParcel(description, dest, 655 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 656 if (activityValues != null) { 657 dest.writeInt(1); 658 activityValues.writeToParcel(dest, 0); 659 } else { 660 dest.writeInt(0); 661 } 662 dest.writeInt(stackId); 663 dest.writeInt(userId); 664 } 665 666 public void readFromParcel(Parcel source) { 667 id = source.readInt(); 668 persistentId = source.readInt(); 669 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 670 origActivity = ComponentName.readFromParcel(source); 671 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 672 activityValues = source.readInt() > 0 ? 673 RecentsActivityValues.CREATOR.createFromParcel(source) : null; 674 stackId = source.readInt(); 675 userId = source.readInt(); 676 } 677 678 public static final Creator<RecentTaskInfo> CREATOR 679 = new Creator<RecentTaskInfo>() { 680 public RecentTaskInfo createFromParcel(Parcel source) { 681 return new RecentTaskInfo(source); 682 } 683 public RecentTaskInfo[] newArray(int size) { 684 return new RecentTaskInfo[size]; 685 } 686 }; 687 688 private RecentTaskInfo(Parcel source) { 689 readFromParcel(source); 690 } 691 } 692 693 /** 694 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 695 * that have set their 696 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 697 */ 698 public static final int RECENT_WITH_EXCLUDED = 0x0001; 699 700 /** 701 * Provides a list that does not contain any 702 * recent tasks that currently are not available to the user. 703 */ 704 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 705 706 /** 707 * Provides a list that contains recent tasks for all 708 * profiles of a user. 709 * @hide 710 */ 711 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 712 713 /** 714 * Return a list of the tasks that the user has recently launched, with 715 * the most recent being first and older ones after in order. 716 * 717 * <p><b>Note: this method is only intended for debugging and presenting 718 * task management user interfaces</b>. This should never be used for 719 * core logic in an application, such as deciding between different 720 * behaviors based on the information found here. Such uses are 721 * <em>not</em> supported, and will likely break in the future. For 722 * example, if multiple applications can be actively running at the 723 * same time, assumptions made about the meaning of the data here for 724 * purposes of control flow will be incorrect.</p> 725 * 726 * @param maxNum The maximum number of entries to return in the list. The 727 * actual number returned may be smaller, depending on how many tasks the 728 * user has started and the maximum number the system can remember. 729 * @param flags Information about what to return. May be any combination 730 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 731 * 732 * @return Returns a list of RecentTaskInfo records describing each of 733 * the recent tasks. 734 * 735 * @throws SecurityException Throws SecurityException if the caller does 736 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 737 */ 738 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 739 throws SecurityException { 740 try { 741 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 742 flags, UserHandle.myUserId()); 743 } catch (RemoteException e) { 744 // System dead, we will be dead too soon! 745 return null; 746 } 747 } 748 749 /** 750 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 751 * specific user. It requires holding 752 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 753 * @param maxNum The maximum number of entries to return in the list. The 754 * actual number returned may be smaller, depending on how many tasks the 755 * user has started and the maximum number the system can remember. 756 * @param flags Information about what to return. May be any combination 757 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 758 * 759 * @return Returns a list of RecentTaskInfo records describing each of 760 * the recent tasks. 761 * 762 * @throws SecurityException Throws SecurityException if the caller does 763 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 764 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 765 * @hide 766 */ 767 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 768 throws SecurityException { 769 try { 770 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 771 flags, userId); 772 } catch (RemoteException e) { 773 // System dead, we will be dead too soon! 774 return null; 775 } 776 } 777 778 /** 779 * Information you can retrieve about a particular task that is currently 780 * "running" in the system. Note that a running task does not mean the 781 * given task actually has a process it is actively running in; it simply 782 * means that the user has gone to it and never closed it, but currently 783 * the system may have killed its process and is only holding on to its 784 * last state in order to restart it when the user returns. 785 */ 786 public static class RunningTaskInfo implements Parcelable { 787 /** 788 * A unique identifier for this task. 789 */ 790 public int id; 791 792 /** 793 * The component launched as the first activity in the task. This can 794 * be considered the "application" of this task. 795 */ 796 public ComponentName baseActivity; 797 798 /** 799 * The activity component at the top of the history stack of the task. 800 * This is what the user is currently doing. 801 */ 802 public ComponentName topActivity; 803 804 /** 805 * Thumbnail representation of the task's current state. Currently 806 * always null. 807 */ 808 public Bitmap thumbnail; 809 810 /** 811 * Description of the task's current state. 812 */ 813 public CharSequence description; 814 815 /** 816 * Number of activities in this task. 817 */ 818 public int numActivities; 819 820 /** 821 * Number of activities that are currently running (not stopped 822 * and persisted) in this task. 823 */ 824 public int numRunning; 825 826 /** 827 * Last time task was run. For sorting. 828 * @hide 829 */ 830 public long lastActiveTime; 831 832 public RunningTaskInfo() { 833 } 834 835 public int describeContents() { 836 return 0; 837 } 838 839 public void writeToParcel(Parcel dest, int flags) { 840 dest.writeInt(id); 841 ComponentName.writeToParcel(baseActivity, dest); 842 ComponentName.writeToParcel(topActivity, dest); 843 if (thumbnail != null) { 844 dest.writeInt(1); 845 thumbnail.writeToParcel(dest, 0); 846 } else { 847 dest.writeInt(0); 848 } 849 TextUtils.writeToParcel(description, dest, 850 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 851 dest.writeInt(numActivities); 852 dest.writeInt(numRunning); 853 } 854 855 public void readFromParcel(Parcel source) { 856 id = source.readInt(); 857 baseActivity = ComponentName.readFromParcel(source); 858 topActivity = ComponentName.readFromParcel(source); 859 if (source.readInt() != 0) { 860 thumbnail = Bitmap.CREATOR.createFromParcel(source); 861 } else { 862 thumbnail = null; 863 } 864 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 865 numActivities = source.readInt(); 866 numRunning = source.readInt(); 867 } 868 869 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 870 public RunningTaskInfo createFromParcel(Parcel source) { 871 return new RunningTaskInfo(source); 872 } 873 public RunningTaskInfo[] newArray(int size) { 874 return new RunningTaskInfo[size]; 875 } 876 }; 877 878 private RunningTaskInfo(Parcel source) { 879 readFromParcel(source); 880 } 881 } 882 883 /** 884 * Return a list of the tasks that are currently running, with 885 * the most recent being first and older ones after in order. Note that 886 * "running" does not mean any of the task's code is currently loaded or 887 * activity -- the task may have been frozen by the system, so that it 888 * can be restarted in its previous state when next brought to the 889 * foreground. 890 * 891 * <p><b>Note: this method is only intended for debugging and presenting 892 * task management user interfaces</b>. This should never be used for 893 * core logic in an application, such as deciding between different 894 * behaviors based on the information found here. Such uses are 895 * <em>not</em> supported, and will likely break in the future. For 896 * example, if multiple applications can be actively running at the 897 * same time, assumptions made about the meaning of the data here for 898 * purposes of control flow will be incorrect.</p> 899 * 900 * @param maxNum The maximum number of entries to return in the list. The 901 * actual number returned may be smaller, depending on how many tasks the 902 * user has started. 903 * 904 * @return Returns a list of RunningTaskInfo records describing each of 905 * the running tasks. 906 * 907 * @throws SecurityException Throws SecurityException if the caller does 908 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 909 */ 910 public List<RunningTaskInfo> getRunningTasks(int maxNum) 911 throws SecurityException { 912 try { 913 return ActivityManagerNative.getDefault().getTasks(maxNum, 0); 914 } catch (RemoteException e) { 915 // System dead, we will be dead too soon! 916 return null; 917 } 918 } 919 920 /** 921 * Remove some end of a task's activity stack that is not part of 922 * the main application. The selected activities will be finished, so 923 * they are no longer part of the main task. 924 * 925 * @param taskId The identifier of the task. 926 * @param subTaskIndex The number of the sub-task; this corresponds 927 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 928 * @return Returns true if the sub-task was found and was removed. 929 * 930 * @hide 931 */ 932 public boolean removeSubTask(int taskId, int subTaskIndex) 933 throws SecurityException { 934 try { 935 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 936 } catch (RemoteException e) { 937 // System dead, we will be dead too soon! 938 return false; 939 } 940 } 941 942 /** 943 * If set, the process of the root activity of the task will be killed 944 * as part of removing the task. 945 * @hide 946 */ 947 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 948 949 /** 950 * Completely remove the given task. 951 * 952 * @param taskId Identifier of the task to be removed. 953 * @param flags Additional operational flags. May be 0 or 954 * {@link #REMOVE_TASK_KILL_PROCESS}. 955 * @return Returns true if the given task was found and removed. 956 * 957 * @hide 958 */ 959 public boolean removeTask(int taskId, int flags) 960 throws SecurityException { 961 try { 962 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 963 } catch (RemoteException e) { 964 // System dead, we will be dead too soon! 965 return false; 966 } 967 } 968 969 /** @hide */ 970 public static class TaskThumbnails implements Parcelable { 971 public Bitmap mainThumbnail; 972 973 public int numSubThumbbails; 974 975 /** @hide */ 976 public IThumbnailRetriever retriever; 977 978 public TaskThumbnails() { 979 } 980 981 public Bitmap getSubThumbnail(int index) { 982 try { 983 return retriever.getThumbnail(index); 984 } catch (RemoteException e) { 985 return null; 986 } 987 } 988 989 public int describeContents() { 990 return 0; 991 } 992 993 public void writeToParcel(Parcel dest, int flags) { 994 if (mainThumbnail != null) { 995 dest.writeInt(1); 996 mainThumbnail.writeToParcel(dest, 0); 997 } else { 998 dest.writeInt(0); 999 } 1000 dest.writeInt(numSubThumbbails); 1001 dest.writeStrongInterface(retriever); 1002 } 1003 1004 public void readFromParcel(Parcel source) { 1005 if (source.readInt() != 0) { 1006 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 1007 } else { 1008 mainThumbnail = null; 1009 } 1010 numSubThumbbails = source.readInt(); 1011 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 1012 } 1013 1014 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 1015 public TaskThumbnails createFromParcel(Parcel source) { 1016 return new TaskThumbnails(source); 1017 } 1018 public TaskThumbnails[] newArray(int size) { 1019 return new TaskThumbnails[size]; 1020 } 1021 }; 1022 1023 private TaskThumbnails(Parcel source) { 1024 readFromParcel(source); 1025 } 1026 } 1027 1028 /** @hide */ 1029 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 1030 try { 1031 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 1032 } catch (RemoteException e) { 1033 // System dead, we will be dead too soon! 1034 return null; 1035 } 1036 } 1037 1038 /** @hide */ 1039 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 1040 try { 1041 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 1042 } catch (RemoteException e) { 1043 // System dead, we will be dead too soon! 1044 return null; 1045 } 1046 } 1047 1048 /** @hide */ 1049 public boolean isInHomeStack(int taskId) { 1050 try { 1051 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 1052 } catch (RemoteException e) { 1053 // System dead, we will be dead too soon! 1054 return false; 1055 } 1056 } 1057 1058 /** 1059 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 1060 * activity along with the task, so it is positioned immediately behind 1061 * the task. 1062 */ 1063 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 1064 1065 /** 1066 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 1067 * user-instigated action, so the current activity will not receive a 1068 * hint that the user is leaving. 1069 */ 1070 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 1071 1072 /** 1073 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1074 * with a null options argument. 1075 * 1076 * @param taskId The identifier of the task to be moved, as found in 1077 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1078 * @param flags Additional operational flags, 0 or more of 1079 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1080 */ 1081 public void moveTaskToFront(int taskId, int flags) { 1082 moveTaskToFront(taskId, flags, null); 1083 } 1084 1085 /** 1086 * Ask that the task associated with a given task ID be moved to the 1087 * front of the stack, so it is now visible to the user. Requires that 1088 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1089 * or a SecurityException will be thrown. 1090 * 1091 * @param taskId The identifier of the task to be moved, as found in 1092 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1093 * @param flags Additional operational flags, 0 or more of 1094 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1095 * @param options Additional options for the operation, either null or 1096 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1097 * Context.startActivity(Intent, Bundle)}. 1098 */ 1099 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1100 try { 1101 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1102 } catch (RemoteException e) { 1103 // System dead, we will be dead too soon! 1104 } 1105 } 1106 1107 /** 1108 * Information you can retrieve about a particular Service that is 1109 * currently running in the system. 1110 */ 1111 public static class RunningServiceInfo implements Parcelable { 1112 /** 1113 * The service component. 1114 */ 1115 public ComponentName service; 1116 1117 /** 1118 * If non-zero, this is the process the service is running in. 1119 */ 1120 public int pid; 1121 1122 /** 1123 * The UID that owns this service. 1124 */ 1125 public int uid; 1126 1127 /** 1128 * The name of the process this service runs in. 1129 */ 1130 public String process; 1131 1132 /** 1133 * Set to true if the service has asked to run as a foreground process. 1134 */ 1135 public boolean foreground; 1136 1137 /** 1138 * The time when the service was first made active, either by someone 1139 * starting or binding to it. This 1140 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1141 */ 1142 public long activeSince; 1143 1144 /** 1145 * Set to true if this service has been explicitly started. 1146 */ 1147 public boolean started; 1148 1149 /** 1150 * Number of clients connected to the service. 1151 */ 1152 public int clientCount; 1153 1154 /** 1155 * Number of times the service's process has crashed while the service 1156 * is running. 1157 */ 1158 public int crashCount; 1159 1160 /** 1161 * The time when there was last activity in the service (either 1162 * explicit requests to start it or clients binding to it). This 1163 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1164 */ 1165 public long lastActivityTime; 1166 1167 /** 1168 * If non-zero, this service is not currently running, but scheduled to 1169 * restart at the given time. 1170 */ 1171 public long restarting; 1172 1173 /** 1174 * Bit for {@link #flags}: set if this service has been 1175 * explicitly started. 1176 */ 1177 public static final int FLAG_STARTED = 1<<0; 1178 1179 /** 1180 * Bit for {@link #flags}: set if the service has asked to 1181 * run as a foreground process. 1182 */ 1183 public static final int FLAG_FOREGROUND = 1<<1; 1184 1185 /** 1186 * Bit for {@link #flags): set if the service is running in a 1187 * core system process. 1188 */ 1189 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1190 1191 /** 1192 * Bit for {@link #flags): set if the service is running in a 1193 * persistent process. 1194 */ 1195 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1196 1197 /** 1198 * Running flags. 1199 */ 1200 public int flags; 1201 1202 /** 1203 * For special services that are bound to by system code, this is 1204 * the package that holds the binding. 1205 */ 1206 public String clientPackage; 1207 1208 /** 1209 * For special services that are bound to by system code, this is 1210 * a string resource providing a user-visible label for who the 1211 * client is. 1212 */ 1213 public int clientLabel; 1214 1215 public RunningServiceInfo() { 1216 } 1217 1218 public int describeContents() { 1219 return 0; 1220 } 1221 1222 public void writeToParcel(Parcel dest, int flags) { 1223 ComponentName.writeToParcel(service, dest); 1224 dest.writeInt(pid); 1225 dest.writeInt(uid); 1226 dest.writeString(process); 1227 dest.writeInt(foreground ? 1 : 0); 1228 dest.writeLong(activeSince); 1229 dest.writeInt(started ? 1 : 0); 1230 dest.writeInt(clientCount); 1231 dest.writeInt(crashCount); 1232 dest.writeLong(lastActivityTime); 1233 dest.writeLong(restarting); 1234 dest.writeInt(this.flags); 1235 dest.writeString(clientPackage); 1236 dest.writeInt(clientLabel); 1237 } 1238 1239 public void readFromParcel(Parcel source) { 1240 service = ComponentName.readFromParcel(source); 1241 pid = source.readInt(); 1242 uid = source.readInt(); 1243 process = source.readString(); 1244 foreground = source.readInt() != 0; 1245 activeSince = source.readLong(); 1246 started = source.readInt() != 0; 1247 clientCount = source.readInt(); 1248 crashCount = source.readInt(); 1249 lastActivityTime = source.readLong(); 1250 restarting = source.readLong(); 1251 flags = source.readInt(); 1252 clientPackage = source.readString(); 1253 clientLabel = source.readInt(); 1254 } 1255 1256 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1257 public RunningServiceInfo createFromParcel(Parcel source) { 1258 return new RunningServiceInfo(source); 1259 } 1260 public RunningServiceInfo[] newArray(int size) { 1261 return new RunningServiceInfo[size]; 1262 } 1263 }; 1264 1265 private RunningServiceInfo(Parcel source) { 1266 readFromParcel(source); 1267 } 1268 } 1269 1270 /** 1271 * Return a list of the services that are currently running. 1272 * 1273 * <p><b>Note: this method is only intended for debugging or implementing 1274 * service management type user interfaces.</b></p> 1275 * 1276 * @param maxNum The maximum number of entries to return in the list. The 1277 * actual number returned may be smaller, depending on how many services 1278 * are running. 1279 * 1280 * @return Returns a list of RunningServiceInfo records describing each of 1281 * the running tasks. 1282 */ 1283 public List<RunningServiceInfo> getRunningServices(int maxNum) 1284 throws SecurityException { 1285 try { 1286 return ActivityManagerNative.getDefault() 1287 .getServices(maxNum, 0); 1288 } catch (RemoteException e) { 1289 // System dead, we will be dead too soon! 1290 return null; 1291 } 1292 } 1293 1294 /** 1295 * Returns a PendingIntent you can start to show a control panel for the 1296 * given running service. If the service does not have a control panel, 1297 * null is returned. 1298 */ 1299 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1300 throws SecurityException { 1301 try { 1302 return ActivityManagerNative.getDefault() 1303 .getRunningServiceControlPanel(service); 1304 } catch (RemoteException e) { 1305 // System dead, we will be dead too soon! 1306 return null; 1307 } 1308 } 1309 1310 /** 1311 * Information you can retrieve about the available memory through 1312 * {@link ActivityManager#getMemoryInfo}. 1313 */ 1314 public static class MemoryInfo implements Parcelable { 1315 /** 1316 * The available memory on the system. This number should not 1317 * be considered absolute: due to the nature of the kernel, a significant 1318 * portion of this memory is actually in use and needed for the overall 1319 * system to run well. 1320 */ 1321 public long availMem; 1322 1323 /** 1324 * The total memory accessible by the kernel. This is basically the 1325 * RAM size of the device, not including below-kernel fixed allocations 1326 * like DMA buffers, RAM for the baseband CPU, etc. 1327 */ 1328 public long totalMem; 1329 1330 /** 1331 * The threshold of {@link #availMem} at which we consider memory to be 1332 * low and start killing background services and other non-extraneous 1333 * processes. 1334 */ 1335 public long threshold; 1336 1337 /** 1338 * Set to true if the system considers itself to currently be in a low 1339 * memory situation. 1340 */ 1341 public boolean lowMemory; 1342 1343 /** @hide */ 1344 public long hiddenAppThreshold; 1345 /** @hide */ 1346 public long secondaryServerThreshold; 1347 /** @hide */ 1348 public long visibleAppThreshold; 1349 /** @hide */ 1350 public long foregroundAppThreshold; 1351 1352 public MemoryInfo() { 1353 } 1354 1355 public int describeContents() { 1356 return 0; 1357 } 1358 1359 public void writeToParcel(Parcel dest, int flags) { 1360 dest.writeLong(availMem); 1361 dest.writeLong(totalMem); 1362 dest.writeLong(threshold); 1363 dest.writeInt(lowMemory ? 1 : 0); 1364 dest.writeLong(hiddenAppThreshold); 1365 dest.writeLong(secondaryServerThreshold); 1366 dest.writeLong(visibleAppThreshold); 1367 dest.writeLong(foregroundAppThreshold); 1368 } 1369 1370 public void readFromParcel(Parcel source) { 1371 availMem = source.readLong(); 1372 totalMem = source.readLong(); 1373 threshold = source.readLong(); 1374 lowMemory = source.readInt() != 0; 1375 hiddenAppThreshold = source.readLong(); 1376 secondaryServerThreshold = source.readLong(); 1377 visibleAppThreshold = source.readLong(); 1378 foregroundAppThreshold = source.readLong(); 1379 } 1380 1381 public static final Creator<MemoryInfo> CREATOR 1382 = new Creator<MemoryInfo>() { 1383 public MemoryInfo createFromParcel(Parcel source) { 1384 return new MemoryInfo(source); 1385 } 1386 public MemoryInfo[] newArray(int size) { 1387 return new MemoryInfo[size]; 1388 } 1389 }; 1390 1391 private MemoryInfo(Parcel source) { 1392 readFromParcel(source); 1393 } 1394 } 1395 1396 /** 1397 * Return general information about the memory state of the system. This 1398 * can be used to help decide how to manage your own memory, though note 1399 * that polling is not recommended and 1400 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1401 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1402 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1403 * level of your process as needed, which gives a better hint for how to 1404 * manage its memory. 1405 */ 1406 public void getMemoryInfo(MemoryInfo outInfo) { 1407 try { 1408 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1409 } catch (RemoteException e) { 1410 } 1411 } 1412 1413 /** 1414 * Information you can retrieve about an ActivityStack in the system. 1415 * @hide 1416 */ 1417 public static class StackInfo implements Parcelable { 1418 public int stackId; 1419 public Rect bounds = new Rect(); 1420 public int[] taskIds; 1421 public String[] taskNames; 1422 public int displayId; 1423 1424 @Override 1425 public int describeContents() { 1426 return 0; 1427 } 1428 1429 @Override 1430 public void writeToParcel(Parcel dest, int flags) { 1431 dest.writeInt(stackId); 1432 dest.writeInt(bounds.left); 1433 dest.writeInt(bounds.top); 1434 dest.writeInt(bounds.right); 1435 dest.writeInt(bounds.bottom); 1436 dest.writeIntArray(taskIds); 1437 dest.writeStringArray(taskNames); 1438 dest.writeInt(displayId); 1439 } 1440 1441 public void readFromParcel(Parcel source) { 1442 stackId = source.readInt(); 1443 bounds = new Rect( 1444 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1445 taskIds = source.createIntArray(); 1446 taskNames = source.createStringArray(); 1447 displayId = source.readInt(); 1448 } 1449 1450 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1451 @Override 1452 public StackInfo createFromParcel(Parcel source) { 1453 return new StackInfo(source); 1454 } 1455 @Override 1456 public StackInfo[] newArray(int size) { 1457 return new StackInfo[size]; 1458 } 1459 }; 1460 1461 public StackInfo() { 1462 } 1463 1464 private StackInfo(Parcel source) { 1465 readFromParcel(source); 1466 } 1467 1468 public String toString(String prefix) { 1469 StringBuilder sb = new StringBuilder(256); 1470 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1471 sb.append(" bounds="); sb.append(bounds.toShortString()); 1472 sb.append(" displayId="); sb.append(displayId); 1473 sb.append("\n"); 1474 prefix = prefix + " "; 1475 for (int i = 0; i < taskIds.length; ++i) { 1476 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1477 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1478 } 1479 return sb.toString(); 1480 } 1481 1482 @Override 1483 public String toString() { 1484 return toString(""); 1485 } 1486 } 1487 1488 /** 1489 * @hide 1490 */ 1491 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1492 try { 1493 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1494 observer, UserHandle.myUserId()); 1495 } catch (RemoteException e) { 1496 return false; 1497 } 1498 } 1499 1500 /** 1501 * Permits an application to erase its own data from disk. This is equivalent to 1502 * the user choosing to clear the app's data from within the device settings UI. It 1503 * erases all dynamic data associated with the app -- its private data and data in its 1504 * private area on external storage -- but does not remove the installed application 1505 * itself, nor any OBB files. 1506 * 1507 * @return {@code true} if the application successfully requested that the application's 1508 * data be erased; {@code false} otherwise. 1509 */ 1510 public boolean clearApplicationUserData() { 1511 return clearApplicationUserData(mContext.getPackageName(), null); 1512 } 1513 1514 /** 1515 * Information you can retrieve about any processes that are in an error condition. 1516 */ 1517 public static class ProcessErrorStateInfo implements Parcelable { 1518 /** 1519 * Condition codes 1520 */ 1521 public static final int NO_ERROR = 0; 1522 public static final int CRASHED = 1; 1523 public static final int NOT_RESPONDING = 2; 1524 1525 /** 1526 * The condition that the process is in. 1527 */ 1528 public int condition; 1529 1530 /** 1531 * The process name in which the crash or error occurred. 1532 */ 1533 public String processName; 1534 1535 /** 1536 * The pid of this process; 0 if none 1537 */ 1538 public int pid; 1539 1540 /** 1541 * The kernel user-ID that has been assigned to this process; 1542 * currently this is not a unique ID (multiple applications can have 1543 * the same uid). 1544 */ 1545 public int uid; 1546 1547 /** 1548 * The activity name associated with the error, if known. May be null. 1549 */ 1550 public String tag; 1551 1552 /** 1553 * A short message describing the error condition. 1554 */ 1555 public String shortMsg; 1556 1557 /** 1558 * A long message describing the error condition. 1559 */ 1560 public String longMsg; 1561 1562 /** 1563 * The stack trace where the error originated. May be null. 1564 */ 1565 public String stackTrace; 1566 1567 /** 1568 * to be deprecated: This value will always be null. 1569 */ 1570 public byte[] crashData = null; 1571 1572 public ProcessErrorStateInfo() { 1573 } 1574 1575 @Override 1576 public int describeContents() { 1577 return 0; 1578 } 1579 1580 @Override 1581 public void writeToParcel(Parcel dest, int flags) { 1582 dest.writeInt(condition); 1583 dest.writeString(processName); 1584 dest.writeInt(pid); 1585 dest.writeInt(uid); 1586 dest.writeString(tag); 1587 dest.writeString(shortMsg); 1588 dest.writeString(longMsg); 1589 dest.writeString(stackTrace); 1590 } 1591 1592 public void readFromParcel(Parcel source) { 1593 condition = source.readInt(); 1594 processName = source.readString(); 1595 pid = source.readInt(); 1596 uid = source.readInt(); 1597 tag = source.readString(); 1598 shortMsg = source.readString(); 1599 longMsg = source.readString(); 1600 stackTrace = source.readString(); 1601 } 1602 1603 public static final Creator<ProcessErrorStateInfo> CREATOR = 1604 new Creator<ProcessErrorStateInfo>() { 1605 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1606 return new ProcessErrorStateInfo(source); 1607 } 1608 public ProcessErrorStateInfo[] newArray(int size) { 1609 return new ProcessErrorStateInfo[size]; 1610 } 1611 }; 1612 1613 private ProcessErrorStateInfo(Parcel source) { 1614 readFromParcel(source); 1615 } 1616 } 1617 1618 /** 1619 * Returns a list of any processes that are currently in an error condition. The result 1620 * will be null if all processes are running properly at this time. 1621 * 1622 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1623 * current error conditions (it will not return an empty list). This list ordering is not 1624 * specified. 1625 */ 1626 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1627 try { 1628 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1629 } catch (RemoteException e) { 1630 return null; 1631 } 1632 } 1633 1634 /** 1635 * Information you can retrieve about a running process. 1636 */ 1637 public static class RunningAppProcessInfo implements Parcelable { 1638 /** 1639 * The name of the process that this object is associated with 1640 */ 1641 public String processName; 1642 1643 /** 1644 * The pid of this process; 0 if none 1645 */ 1646 public int pid; 1647 1648 /** 1649 * The user id of this process. 1650 */ 1651 public int uid; 1652 1653 /** 1654 * All packages that have been loaded into the process. 1655 */ 1656 public String pkgList[]; 1657 1658 /** 1659 * Constant for {@link #flags}: this is an app that is unable to 1660 * correctly save its state when going to the background, 1661 * so it can not be killed while in the background. 1662 * @hide 1663 */ 1664 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1665 1666 /** 1667 * Constant for {@link #flags}: this process is associated with a 1668 * persistent system app. 1669 * @hide 1670 */ 1671 public static final int FLAG_PERSISTENT = 1<<1; 1672 1673 /** 1674 * Constant for {@link #flags}: this process is associated with a 1675 * persistent system app. 1676 * @hide 1677 */ 1678 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1679 1680 /** 1681 * Flags of information. May be any of 1682 * {@link #FLAG_CANT_SAVE_STATE}. 1683 * @hide 1684 */ 1685 public int flags; 1686 1687 /** 1688 * Last memory trim level reported to the process: corresponds to 1689 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1690 * ComponentCallbacks2.onTrimMemory(int)}. 1691 */ 1692 public int lastTrimLevel; 1693 1694 /** 1695 * Constant for {@link #importance}: this process is running the 1696 * foreground UI. 1697 */ 1698 public static final int IMPORTANCE_FOREGROUND = 100; 1699 1700 /** 1701 * Constant for {@link #importance}: this process is running something 1702 * that is actively visible to the user, though not in the immediate 1703 * foreground. 1704 */ 1705 public static final int IMPORTANCE_VISIBLE = 200; 1706 1707 /** 1708 * Constant for {@link #importance}: this process is running something 1709 * that is considered to be actively perceptible to the user. An 1710 * example would be an application performing background music playback. 1711 */ 1712 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1713 1714 /** 1715 * Constant for {@link #importance}: this process is running an 1716 * application that can not save its state, and thus can't be killed 1717 * while in the background. 1718 * @hide 1719 */ 1720 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1721 1722 /** 1723 * Constant for {@link #importance}: this process is contains services 1724 * that should remain running. 1725 */ 1726 public static final int IMPORTANCE_SERVICE = 300; 1727 1728 /** 1729 * Constant for {@link #importance}: this process process contains 1730 * background code that is expendable. 1731 */ 1732 public static final int IMPORTANCE_BACKGROUND = 400; 1733 1734 /** 1735 * Constant for {@link #importance}: this process is empty of any 1736 * actively running code. 1737 */ 1738 public static final int IMPORTANCE_EMPTY = 500; 1739 1740 /** 1741 * The relative importance level that the system places on this 1742 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1743 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1744 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1745 * constants are numbered so that "more important" values are always 1746 * smaller than "less important" values. 1747 */ 1748 public int importance; 1749 1750 /** 1751 * An additional ordering within a particular {@link #importance} 1752 * category, providing finer-grained information about the relative 1753 * utility of processes within a category. This number means nothing 1754 * except that a smaller values are more recently used (and thus 1755 * more important). Currently an LRU value is only maintained for 1756 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1757 * be maintained in the future. 1758 */ 1759 public int lru; 1760 1761 /** 1762 * Constant for {@link #importanceReasonCode}: nothing special has 1763 * been specified for the reason for this level. 1764 */ 1765 public static final int REASON_UNKNOWN = 0; 1766 1767 /** 1768 * Constant for {@link #importanceReasonCode}: one of the application's 1769 * content providers is being used by another process. The pid of 1770 * the client process is in {@link #importanceReasonPid} and the 1771 * target provider in this process is in 1772 * {@link #importanceReasonComponent}. 1773 */ 1774 public static final int REASON_PROVIDER_IN_USE = 1; 1775 1776 /** 1777 * Constant for {@link #importanceReasonCode}: one of the application's 1778 * content providers is being used by another process. The pid of 1779 * the client process is in {@link #importanceReasonPid} and the 1780 * target provider in this process is in 1781 * {@link #importanceReasonComponent}. 1782 */ 1783 public static final int REASON_SERVICE_IN_USE = 2; 1784 1785 /** 1786 * The reason for {@link #importance}, if any. 1787 */ 1788 public int importanceReasonCode; 1789 1790 /** 1791 * For the specified values of {@link #importanceReasonCode}, this 1792 * is the process ID of the other process that is a client of this 1793 * process. This will be 0 if no other process is using this one. 1794 */ 1795 public int importanceReasonPid; 1796 1797 /** 1798 * For the specified values of {@link #importanceReasonCode}, this 1799 * is the name of the component that is being used in this process. 1800 */ 1801 public ComponentName importanceReasonComponent; 1802 1803 /** 1804 * When {@link #importanceReasonPid} is non-0, this is the importance 1805 * of the other pid. @hide 1806 */ 1807 public int importanceReasonImportance; 1808 1809 /** 1810 * Current process state, as per PROCESS_STATE_* constants. 1811 * @hide 1812 */ 1813 public int processState; 1814 1815 public RunningAppProcessInfo() { 1816 importance = IMPORTANCE_FOREGROUND; 1817 importanceReasonCode = REASON_UNKNOWN; 1818 processState = PROCESS_STATE_IMPORTANT_FOREGROUND; 1819 } 1820 1821 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1822 processName = pProcessName; 1823 pid = pPid; 1824 pkgList = pArr; 1825 } 1826 1827 public int describeContents() { 1828 return 0; 1829 } 1830 1831 public void writeToParcel(Parcel dest, int flags) { 1832 dest.writeString(processName); 1833 dest.writeInt(pid); 1834 dest.writeInt(uid); 1835 dest.writeStringArray(pkgList); 1836 dest.writeInt(this.flags); 1837 dest.writeInt(lastTrimLevel); 1838 dest.writeInt(importance); 1839 dest.writeInt(lru); 1840 dest.writeInt(importanceReasonCode); 1841 dest.writeInt(importanceReasonPid); 1842 ComponentName.writeToParcel(importanceReasonComponent, dest); 1843 dest.writeInt(importanceReasonImportance); 1844 dest.writeInt(processState); 1845 } 1846 1847 public void readFromParcel(Parcel source) { 1848 processName = source.readString(); 1849 pid = source.readInt(); 1850 uid = source.readInt(); 1851 pkgList = source.readStringArray(); 1852 flags = source.readInt(); 1853 lastTrimLevel = source.readInt(); 1854 importance = source.readInt(); 1855 lru = source.readInt(); 1856 importanceReasonCode = source.readInt(); 1857 importanceReasonPid = source.readInt(); 1858 importanceReasonComponent = ComponentName.readFromParcel(source); 1859 importanceReasonImportance = source.readInt(); 1860 processState = source.readInt(); 1861 } 1862 1863 public static final Creator<RunningAppProcessInfo> CREATOR = 1864 new Creator<RunningAppProcessInfo>() { 1865 public RunningAppProcessInfo createFromParcel(Parcel source) { 1866 return new RunningAppProcessInfo(source); 1867 } 1868 public RunningAppProcessInfo[] newArray(int size) { 1869 return new RunningAppProcessInfo[size]; 1870 } 1871 }; 1872 1873 private RunningAppProcessInfo(Parcel source) { 1874 readFromParcel(source); 1875 } 1876 } 1877 1878 /** 1879 * Returns a list of application processes installed on external media 1880 * that are running on the device. 1881 * 1882 * <p><b>Note: this method is only intended for debugging or building 1883 * a user-facing process management UI.</b></p> 1884 * 1885 * @return Returns a list of ApplicationInfo records, or null if none 1886 * This list ordering is not specified. 1887 * @hide 1888 */ 1889 public List<ApplicationInfo> getRunningExternalApplications() { 1890 try { 1891 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1892 } catch (RemoteException e) { 1893 return null; 1894 } 1895 } 1896 1897 /** 1898 * Returns a list of application processes that are running on the device. 1899 * 1900 * <p><b>Note: this method is only intended for debugging or building 1901 * a user-facing process management UI.</b></p> 1902 * 1903 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1904 * running processes (it will not return an empty list). This list ordering is not 1905 * specified. 1906 */ 1907 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1908 try { 1909 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1910 } catch (RemoteException e) { 1911 return null; 1912 } 1913 } 1914 1915 /** 1916 * Return global memory state information for the calling process. This 1917 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 1918 * only fields that will be filled in are 1919 * {@link RunningAppProcessInfo#pid}, 1920 * {@link RunningAppProcessInfo#uid}, 1921 * {@link RunningAppProcessInfo#lastTrimLevel}, 1922 * {@link RunningAppProcessInfo#importance}, 1923 * {@link RunningAppProcessInfo#lru}, and 1924 * {@link RunningAppProcessInfo#importanceReasonCode}. 1925 */ 1926 static public void getMyMemoryState(RunningAppProcessInfo outState) { 1927 try { 1928 ActivityManagerNative.getDefault().getMyMemoryState(outState); 1929 } catch (RemoteException e) { 1930 } 1931 } 1932 1933 /** 1934 * Return information about the memory usage of one or more processes. 1935 * 1936 * <p><b>Note: this method is only intended for debugging or building 1937 * a user-facing process management UI.</b></p> 1938 * 1939 * @param pids The pids of the processes whose memory usage is to be 1940 * retrieved. 1941 * @return Returns an array of memory information, one for each 1942 * requested pid. 1943 */ 1944 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1945 try { 1946 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1947 } catch (RemoteException e) { 1948 return null; 1949 } 1950 } 1951 1952 /** 1953 * @deprecated This is now just a wrapper for 1954 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1955 * is no longer available to applications because it allows them to 1956 * break other applications by removing their alarms, stopping their 1957 * services, etc. 1958 */ 1959 @Deprecated 1960 public void restartPackage(String packageName) { 1961 killBackgroundProcesses(packageName); 1962 } 1963 1964 /** 1965 * Have the system immediately kill all background processes associated 1966 * with the given package. This is the same as the kernel killing those 1967 * processes to reclaim memory; the system will take care of restarting 1968 * these processes in the future as needed. 1969 * 1970 * <p>You must hold the permission 1971 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1972 * call this method. 1973 * 1974 * @param packageName The name of the package whose processes are to 1975 * be killed. 1976 */ 1977 public void killBackgroundProcesses(String packageName) { 1978 try { 1979 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 1980 UserHandle.myUserId()); 1981 } catch (RemoteException e) { 1982 } 1983 } 1984 1985 /** 1986 * Have the system perform a force stop of everything associated with 1987 * the given application package. All processes that share its uid 1988 * will be killed, all services it has running stopped, all activities 1989 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1990 * broadcast will be sent, so that any of its registered alarms can 1991 * be stopped, notifications removed, etc. 1992 * 1993 * <p>You must hold the permission 1994 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1995 * call this method. 1996 * 1997 * @param packageName The name of the package to be stopped. 1998 * 1999 * @hide This is not available to third party applications due to 2000 * it allowing them to break other applications by stopping their 2001 * services, removing their alarms, etc. 2002 */ 2003 public void forceStopPackage(String packageName) { 2004 try { 2005 ActivityManagerNative.getDefault().forceStopPackage(packageName, 2006 UserHandle.myUserId()); 2007 } catch (RemoteException e) { 2008 } 2009 } 2010 2011 /** 2012 * Get the device configuration attributes. 2013 */ 2014 public ConfigurationInfo getDeviceConfigurationInfo() { 2015 try { 2016 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 2017 } catch (RemoteException e) { 2018 } 2019 return null; 2020 } 2021 2022 /** 2023 * Get the preferred density of icons for the launcher. This is used when 2024 * custom drawables are created (e.g., for shortcuts). 2025 * 2026 * @return density in terms of DPI 2027 */ 2028 public int getLauncherLargeIconDensity() { 2029 final Resources res = mContext.getResources(); 2030 final int density = res.getDisplayMetrics().densityDpi; 2031 final int sw = res.getConfiguration().smallestScreenWidthDp; 2032 2033 if (sw < 600) { 2034 // Smaller than approx 7" tablets, use the regular icon size. 2035 return density; 2036 } 2037 2038 switch (density) { 2039 case DisplayMetrics.DENSITY_LOW: 2040 return DisplayMetrics.DENSITY_MEDIUM; 2041 case DisplayMetrics.DENSITY_MEDIUM: 2042 return DisplayMetrics.DENSITY_HIGH; 2043 case DisplayMetrics.DENSITY_TV: 2044 return DisplayMetrics.DENSITY_XHIGH; 2045 case DisplayMetrics.DENSITY_HIGH: 2046 return DisplayMetrics.DENSITY_XHIGH; 2047 case DisplayMetrics.DENSITY_XHIGH: 2048 return DisplayMetrics.DENSITY_XXHIGH; 2049 case DisplayMetrics.DENSITY_XXHIGH: 2050 return DisplayMetrics.DENSITY_XHIGH * 2; 2051 default: 2052 // The density is some abnormal value. Return some other 2053 // abnormal value that is a reasonable scaling of it. 2054 return (int)((density*1.5f)+.5f); 2055 } 2056 } 2057 2058 /** 2059 * Get the preferred launcher icon size. This is used when custom drawables 2060 * are created (e.g., for shortcuts). 2061 * 2062 * @return dimensions of square icons in terms of pixels 2063 */ 2064 public int getLauncherLargeIconSize() { 2065 return getLauncherLargeIconSizeInner(mContext); 2066 } 2067 2068 static int getLauncherLargeIconSizeInner(Context context) { 2069 final Resources res = context.getResources(); 2070 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 2071 final int sw = res.getConfiguration().smallestScreenWidthDp; 2072 2073 if (sw < 600) { 2074 // Smaller than approx 7" tablets, use the regular icon size. 2075 return size; 2076 } 2077 2078 final int density = res.getDisplayMetrics().densityDpi; 2079 2080 switch (density) { 2081 case DisplayMetrics.DENSITY_LOW: 2082 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2083 case DisplayMetrics.DENSITY_MEDIUM: 2084 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2085 case DisplayMetrics.DENSITY_TV: 2086 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2087 case DisplayMetrics.DENSITY_HIGH: 2088 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2089 case DisplayMetrics.DENSITY_XHIGH: 2090 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2091 case DisplayMetrics.DENSITY_XXHIGH: 2092 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2093 default: 2094 // The density is some abnormal value. Return some other 2095 // abnormal value that is a reasonable scaling of it. 2096 return (int)((size*1.5f) + .5f); 2097 } 2098 } 2099 2100 /** 2101 * Returns "true" if the user interface is currently being messed with 2102 * by a monkey. 2103 */ 2104 public static boolean isUserAMonkey() { 2105 try { 2106 return ActivityManagerNative.getDefault().isUserAMonkey(); 2107 } catch (RemoteException e) { 2108 } 2109 return false; 2110 } 2111 2112 /** 2113 * Returns "true" if device is running in a test harness. 2114 */ 2115 public static boolean isRunningInTestHarness() { 2116 return SystemProperties.getBoolean("ro.test_harness", false); 2117 } 2118 2119 /** 2120 * Returns the launch count of each installed package. 2121 * 2122 * @hide 2123 */ 2124 public Map<String, Integer> getAllPackageLaunchCounts() { 2125 try { 2126 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2127 ServiceManager.getService("usagestats")); 2128 if (usageStatsService == null) { 2129 return new HashMap<String, Integer>(); 2130 } 2131 2132 UsageStats.PackageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats( 2133 ActivityThread.currentPackageName()); 2134 if (allPkgUsageStats == null) { 2135 return new HashMap<String, Integer>(); 2136 } 2137 2138 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2139 for (UsageStats.PackageStats pkgUsageStats : allPkgUsageStats) { 2140 launchCounts.put(pkgUsageStats.getPackageName(), pkgUsageStats.getLaunchCount()); 2141 } 2142 2143 return launchCounts; 2144 } catch (RemoteException e) { 2145 Log.w(TAG, "Could not query launch counts", e); 2146 return new HashMap<String, Integer>(); 2147 } 2148 } 2149 2150 /** @hide */ 2151 public static int checkComponentPermission(String permission, int uid, 2152 int owningUid, boolean exported) { 2153 // Root, system server get to do everything. 2154 if (uid == 0 || uid == Process.SYSTEM_UID) { 2155 return PackageManager.PERMISSION_GRANTED; 2156 } 2157 // Isolated processes don't get any permissions. 2158 if (UserHandle.isIsolated(uid)) { 2159 return PackageManager.PERMISSION_DENIED; 2160 } 2161 // If there is a uid that owns whatever is being accessed, it has 2162 // blanket access to it regardless of the permissions it requires. 2163 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2164 return PackageManager.PERMISSION_GRANTED; 2165 } 2166 // If the target is not exported, then nobody else can get to it. 2167 if (!exported) { 2168 /* 2169 RuntimeException here = new RuntimeException("here"); 2170 here.fillInStackTrace(); 2171 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2172 here); 2173 */ 2174 return PackageManager.PERMISSION_DENIED; 2175 } 2176 if (permission == null) { 2177 return PackageManager.PERMISSION_GRANTED; 2178 } 2179 try { 2180 return AppGlobals.getPackageManager() 2181 .checkUidPermission(permission, uid); 2182 } catch (RemoteException e) { 2183 // Should never happen, but if it does... deny! 2184 Slog.e(TAG, "PackageManager is dead?!?", e); 2185 } 2186 return PackageManager.PERMISSION_DENIED; 2187 } 2188 2189 /** @hide */ 2190 public static int checkUidPermission(String permission, int uid) { 2191 try { 2192 return AppGlobals.getPackageManager() 2193 .checkUidPermission(permission, uid); 2194 } catch (RemoteException e) { 2195 // Should never happen, but if it does... deny! 2196 Slog.e(TAG, "PackageManager is dead?!?", e); 2197 } 2198 return PackageManager.PERMISSION_DENIED; 2199 } 2200 2201 /** 2202 * @hide 2203 * Helper for dealing with incoming user arguments to system service calls. 2204 * Takes care of checking permissions and converting USER_CURRENT to the 2205 * actual current user. 2206 * 2207 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2208 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2209 * @param userId The user id argument supplied by the caller -- this is the user 2210 * they want to run as. 2211 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2212 * to get a USER_ALL returned and deal with it correctly. If false, 2213 * an exception will be thrown if USER_ALL is supplied. 2214 * @param requireFull If true, the caller must hold 2215 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2216 * different user than their current process; otherwise they must hold 2217 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2218 * @param name Optional textual name of the incoming call; only for generating error messages. 2219 * @param callerPackage Optional package name of caller; only for error messages. 2220 * 2221 * @return Returns the user ID that the call should run as. Will always be a concrete 2222 * user number, unless <var>allowAll</var> is true in which case it could also be 2223 * USER_ALL. 2224 */ 2225 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2226 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2227 if (UserHandle.getUserId(callingUid) == userId) { 2228 return userId; 2229 } 2230 try { 2231 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2232 callingUid, userId, allowAll, requireFull, name, callerPackage); 2233 } catch (RemoteException e) { 2234 throw new SecurityException("Failed calling activity manager", e); 2235 } 2236 } 2237 2238 /** @hide */ 2239 public static int getCurrentUser() { 2240 UserInfo ui; 2241 try { 2242 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2243 return ui != null ? ui.id : 0; 2244 } catch (RemoteException e) { 2245 return 0; 2246 } 2247 } 2248 2249 /** 2250 * Returns the usage statistics of each installed package. 2251 * 2252 * @hide 2253 */ 2254 public UsageStats.PackageStats[] getAllPackageUsageStats() { 2255 try { 2256 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2257 ServiceManager.getService("usagestats")); 2258 if (usageStatsService != null) { 2259 return usageStatsService.getAllPkgUsageStats(ActivityThread.currentPackageName()); 2260 } 2261 } catch (RemoteException e) { 2262 Log.w(TAG, "Could not query usage stats", e); 2263 } 2264 return new UsageStats.PackageStats[0]; 2265 } 2266 2267 /** 2268 * @param userid the user's id. Zero indicates the default user 2269 * @hide 2270 */ 2271 public boolean switchUser(int userid) { 2272 try { 2273 return ActivityManagerNative.getDefault().switchUser(userid); 2274 } catch (RemoteException e) { 2275 return false; 2276 } 2277 } 2278 2279 /** 2280 * Return whether the given user is actively running. This means that 2281 * the user is in the "started" state, not "stopped" -- it is currently 2282 * allowed to run code through scheduled alarms, receiving broadcasts, 2283 * etc. A started user may be either the current foreground user or a 2284 * background user; the result here does not distinguish between the two. 2285 * @param userid the user's id. Zero indicates the default user. 2286 * @hide 2287 */ 2288 public boolean isUserRunning(int userid) { 2289 try { 2290 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2291 } catch (RemoteException e) { 2292 return false; 2293 } 2294 } 2295 2296 /** 2297 * Perform a system dump of various state associated with the given application 2298 * package name. This call blocks while the dump is being performed, so should 2299 * not be done on a UI thread. The data will be written to the given file 2300 * descriptor as text. An application must hold the 2301 * {@link android.Manifest.permission#DUMP} permission to make this call. 2302 * @param fd The file descriptor that the dump should be written to. The file 2303 * descriptor is <em>not</em> closed by this function; the caller continues to 2304 * own it. 2305 * @param packageName The name of the package that is to be dumped. 2306 */ 2307 public void dumpPackageState(FileDescriptor fd, String packageName) { 2308 dumpPackageStateStatic(fd, packageName); 2309 } 2310 2311 /** 2312 * @hide 2313 */ 2314 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2315 FileOutputStream fout = new FileOutputStream(fd); 2316 PrintWriter pw = new FastPrintWriter(fout); 2317 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2318 "-a", "package", packageName }); 2319 pw.println(); 2320 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2321 pw.println(); 2322 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2323 pw.println(); 2324 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2325 pw.println(); 2326 dumpService(pw, fd, "package", new String[] { packageName }); 2327 pw.println(); 2328 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2329 pw.flush(); 2330 } 2331 2332 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2333 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2334 IBinder service = ServiceManager.checkService(name); 2335 if (service == null) { 2336 pw.println(" (Service not found)"); 2337 return; 2338 } 2339 TransferPipe tp = null; 2340 try { 2341 pw.flush(); 2342 tp = new TransferPipe(); 2343 tp.setBufferPrefix(" "); 2344 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2345 tp.go(fd); 2346 } catch (Throwable e) { 2347 if (tp != null) { 2348 tp.kill(); 2349 } 2350 pw.println("Failure dumping service:"); 2351 e.printStackTrace(pw); 2352 } 2353 } 2354 2355 /** 2356 * @hide 2357 */ 2358 public void startLockTaskMode(int taskId) { 2359 try { 2360 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2361 } catch (RemoteException e) { 2362 } 2363 } 2364 2365 /** 2366 * @hide 2367 */ 2368 public void stopLockTaskMode() { 2369 try { 2370 ActivityManagerNative.getDefault().stopLockTaskMode(); 2371 } catch (RemoteException e) { 2372 } 2373 } 2374 2375 /** 2376 * @hide 2377 */ 2378 public boolean isInLockTaskMode() { 2379 try { 2380 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2381 } catch (RemoteException e) { 2382 return false; 2383 } 2384 } 2385} 2386