ActivityManager.java revision 2cb86c723195e24278f983241cd6b1e307acf159
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.Color; 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.ArrayList; 57import java.util.HashMap; 58import java.util.List; 59import java.util.Map; 60 61/** 62 * Interact with the overall activities running in the system. 63 */ 64public class ActivityManager { 65 private static String TAG = "ActivityManager"; 66 private static boolean localLOGV = false; 67 68 private final Context mContext; 69 private final Handler mHandler; 70 71 /** 72 * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code 73 * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be 74 * uninstalled in lieu of the declaring one. The package named here must be 75 * signed with the same certificate as the one declaring the {@code <meta-data>}. 76 */ 77 public static final String META_HOME_ALTERNATE = "android.app.home.alternate"; 78 79 /** 80 * Result for IActivityManager.startActivity: trying to start an activity under voice 81 * control when that activity does not support the VOICE category. 82 * @hide 83 */ 84 public static final int START_NOT_VOICE_COMPATIBLE = -7; 85 86 /** 87 * Result for IActivityManager.startActivity: an error where the 88 * start had to be canceled. 89 * @hide 90 */ 91 public static final int START_CANCELED = -6; 92 93 /** 94 * Result for IActivityManager.startActivity: an error where the 95 * thing being started is not an activity. 96 * @hide 97 */ 98 public static final int START_NOT_ACTIVITY = -5; 99 100 /** 101 * Result for IActivityManager.startActivity: an error where the 102 * caller does not have permission to start the activity. 103 * @hide 104 */ 105 public static final int START_PERMISSION_DENIED = -4; 106 107 /** 108 * Result for IActivityManager.startActivity: an error where the 109 * caller has requested both to forward a result and to receive 110 * a result. 111 * @hide 112 */ 113 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 114 115 /** 116 * Result for IActivityManager.startActivity: an error where the 117 * requested class is not found. 118 * @hide 119 */ 120 public static final int START_CLASS_NOT_FOUND = -2; 121 122 /** 123 * Result for IActivityManager.startActivity: an error where the 124 * given Intent could not be resolved to an activity. 125 * @hide 126 */ 127 public static final int START_INTENT_NOT_RESOLVED = -1; 128 129 /** 130 * Result for IActivityManaqer.startActivity: the activity was started 131 * successfully as normal. 132 * @hide 133 */ 134 public static final int START_SUCCESS = 0; 135 136 /** 137 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 138 * be executed if it is the recipient, and that is indeed the case. 139 * @hide 140 */ 141 public static final int START_RETURN_INTENT_TO_CALLER = 1; 142 143 /** 144 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 145 * a task was simply brought to the foreground. 146 * @hide 147 */ 148 public static final int START_TASK_TO_FRONT = 2; 149 150 /** 151 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 152 * the given Intent was given to the existing top activity. 153 * @hide 154 */ 155 public static final int START_DELIVERED_TO_TOP = 3; 156 157 /** 158 * Result for IActivityManaqer.startActivity: request was canceled because 159 * app switches are temporarily canceled to ensure the user's last request 160 * (such as pressing home) is performed. 161 * @hide 162 */ 163 public static final int START_SWITCHES_CANCELED = 4; 164 165 /** 166 * Result for IActivityManaqer.startActivity: a new activity was attempted to be started 167 * while in Lock Task Mode. 168 * @hide 169 */ 170 public static final int START_RETURN_LOCK_TASK_MODE_VIOLATION = 5; 171 172 /** 173 * Flag for IActivityManaqer.startActivity: do special start mode where 174 * a new activity is launched only if it is needed. 175 * @hide 176 */ 177 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 178 179 /** 180 * Flag for IActivityManaqer.startActivity: launch the app for 181 * debugging. 182 * @hide 183 */ 184 public static final int START_FLAG_DEBUG = 1<<1; 185 186 /** 187 * Flag for IActivityManaqer.startActivity: launch the app for 188 * OpenGL tracing. 189 * @hide 190 */ 191 public static final int START_FLAG_OPENGL_TRACES = 1<<2; 192 193 /** 194 * Flag for IActivityManaqer.startActivity: if the app is being 195 * launched for profiling, automatically stop the profiler once done. 196 * @hide 197 */ 198 public static final int START_FLAG_AUTO_STOP_PROFILER = 1<<3; 199 200 /** 201 * Result for IActivityManaqer.broadcastIntent: success! 202 * @hide 203 */ 204 public static final int BROADCAST_SUCCESS = 0; 205 206 /** 207 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 208 * a sticky intent without appropriate permission. 209 * @hide 210 */ 211 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 212 213 /** 214 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 215 * for a sendBroadcast operation. 216 * @hide 217 */ 218 public static final int INTENT_SENDER_BROADCAST = 1; 219 220 /** 221 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 222 * for a startActivity operation. 223 * @hide 224 */ 225 public static final int INTENT_SENDER_ACTIVITY = 2; 226 227 /** 228 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 229 * for an activity result operation. 230 * @hide 231 */ 232 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 233 234 /** 235 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 236 * for a startService operation. 237 * @hide 238 */ 239 public static final int INTENT_SENDER_SERVICE = 4; 240 241 /** @hide User operation call: success! */ 242 public static final int USER_OP_SUCCESS = 0; 243 244 /** @hide User operation call: given user id is not known. */ 245 public static final int USER_OP_UNKNOWN_USER = -1; 246 247 /** @hide User operation call: given user id is the current user, can't be stopped. */ 248 public static final int USER_OP_IS_CURRENT = -2; 249 250 /** @hide Process is a persistent system process. */ 251 public static final int PROCESS_STATE_PERSISTENT = 0; 252 253 /** @hide Process is a persistent system process and is doing UI. */ 254 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 255 256 /** @hide Process is hosting the current top activities. Note that this covers 257 * all activities that are visible to the user. */ 258 public static final int PROCESS_STATE_TOP = 2; 259 260 /** @hide Process is important to the user, and something they are aware of. */ 261 public static final int PROCESS_STATE_IMPORTANT_FOREGROUND = 3; 262 263 /** @hide Process is important to the user, but not something they are aware of. */ 264 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 4; 265 266 /** @hide Process is in the background running a backup/restore operation. */ 267 public static final int PROCESS_STATE_BACKUP = 5; 268 269 /** @hide Process is in the background, but it can't restore its state so we want 270 * to try to avoid killing it. */ 271 public static final int PROCESS_STATE_HEAVY_WEIGHT = 6; 272 273 /** @hide Process is in the background running a service. Unlike oom_adj, this level 274 * is used for both the normal running in background state and the executing 275 * operations state. */ 276 public static final int PROCESS_STATE_SERVICE = 7; 277 278 /** @hide Process is in the background running a receiver. Note that from the 279 * perspective of oom_adj receivers run at a higher foreground level, but for our 280 * prioritization here that is not necessary and putting them below services means 281 * many fewer changes in some process states as they receive broadcasts. */ 282 public static final int PROCESS_STATE_RECEIVER = 8; 283 284 /** @hide Process is in the background but hosts the home activity. */ 285 public static final int PROCESS_STATE_HOME = 9; 286 287 /** @hide Process is in the background but hosts the last shown activity. */ 288 public static final int PROCESS_STATE_LAST_ACTIVITY = 10; 289 290 /** @hide Process is being cached for later use and contains activities. */ 291 public static final int PROCESS_STATE_CACHED_ACTIVITY = 11; 292 293 /** @hide Process is being cached for later use and is a client of another cached 294 * process that contains activities. */ 295 public static final int PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 12; 296 297 /** @hide Process is being cached for later use and is empty. */ 298 public static final int PROCESS_STATE_CACHED_EMPTY = 13; 299 300 /*package*/ ActivityManager(Context context, Handler handler) { 301 mContext = context; 302 mHandler = handler; 303 } 304 305 /** 306 * Screen compatibility mode: the application most always run in 307 * compatibility mode. 308 * @hide 309 */ 310 public static final int COMPAT_MODE_ALWAYS = -1; 311 312 /** 313 * Screen compatibility mode: the application can never run in 314 * compatibility mode. 315 * @hide 316 */ 317 public static final int COMPAT_MODE_NEVER = -2; 318 319 /** 320 * Screen compatibility mode: unknown. 321 * @hide 322 */ 323 public static final int COMPAT_MODE_UNKNOWN = -3; 324 325 /** 326 * Screen compatibility mode: the application currently has compatibility 327 * mode disabled. 328 * @hide 329 */ 330 public static final int COMPAT_MODE_DISABLED = 0; 331 332 /** 333 * Screen compatibility mode: the application currently has compatibility 334 * mode enabled. 335 * @hide 336 */ 337 public static final int COMPAT_MODE_ENABLED = 1; 338 339 /** 340 * Screen compatibility mode: request to toggle the application's 341 * compatibility mode. 342 * @hide 343 */ 344 public static final int COMPAT_MODE_TOGGLE = 2; 345 346 /** @hide */ 347 public int getFrontActivityScreenCompatMode() { 348 try { 349 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 350 } catch (RemoteException e) { 351 // System dead, we will be dead too soon! 352 return 0; 353 } 354 } 355 356 /** @hide */ 357 public void setFrontActivityScreenCompatMode(int mode) { 358 try { 359 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 360 } catch (RemoteException e) { 361 // System dead, we will be dead too soon! 362 } 363 } 364 365 /** @hide */ 366 public int getPackageScreenCompatMode(String packageName) { 367 try { 368 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 369 } catch (RemoteException e) { 370 // System dead, we will be dead too soon! 371 return 0; 372 } 373 } 374 375 /** @hide */ 376 public void setPackageScreenCompatMode(String packageName, int mode) { 377 try { 378 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 379 } catch (RemoteException e) { 380 // System dead, we will be dead too soon! 381 } 382 } 383 384 /** @hide */ 385 public boolean getPackageAskScreenCompat(String packageName) { 386 try { 387 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 388 } catch (RemoteException e) { 389 // System dead, we will be dead too soon! 390 return false; 391 } 392 } 393 394 /** @hide */ 395 public void setPackageAskScreenCompat(String packageName, boolean ask) { 396 try { 397 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 398 } catch (RemoteException e) { 399 // System dead, we will be dead too soon! 400 } 401 } 402 403 /** 404 * Return the approximate per-application memory class of the current 405 * device. This gives you an idea of how hard a memory limit you should 406 * impose on your application to let the overall system work best. The 407 * returned value is in megabytes; the baseline Android memory class is 408 * 16 (which happens to be the Java heap limit of those devices); some 409 * device with more memory may return 24 or even higher numbers. 410 */ 411 public int getMemoryClass() { 412 return staticGetMemoryClass(); 413 } 414 415 /** @hide */ 416 static public int staticGetMemoryClass() { 417 // Really brain dead right now -- just take this from the configured 418 // vm heap size, and assume it is in megabytes and thus ends with "m". 419 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 420 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 421 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 422 } 423 return staticGetLargeMemoryClass(); 424 } 425 426 /** 427 * Return the approximate per-application memory class of the current 428 * device when an application is running with a large heap. This is the 429 * space available for memory-intensive applications; most applications 430 * should not need this amount of memory, and should instead stay with the 431 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 432 * This may be the same size as {@link #getMemoryClass()} on memory 433 * constrained devices, or it may be significantly larger on devices with 434 * a large amount of available RAM. 435 * 436 * <p>The is the size of the application's Dalvik heap if it has 437 * specified <code>android:largeHeap="true"</code> in its manifest. 438 */ 439 public int getLargeMemoryClass() { 440 return staticGetLargeMemoryClass(); 441 } 442 443 /** @hide */ 444 static public int staticGetLargeMemoryClass() { 445 // Really brain dead right now -- just take this from the configured 446 // vm heap size, and assume it is in megabytes and thus ends with "m". 447 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 448 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 449 } 450 451 /** 452 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 453 * is ultimately up to the device configuration, but currently it generally means 454 * something in the class of a 512MB device with about a 800x480 or less screen. 455 * This is mostly intended to be used by apps to determine whether they should turn 456 * off certain features that require more RAM. 457 */ 458 public boolean isLowRamDevice() { 459 return isLowRamDeviceStatic(); 460 } 461 462 /** @hide */ 463 public static boolean isLowRamDeviceStatic() { 464 return "true".equals(SystemProperties.get("ro.config.low_ram", "false")); 465 } 466 467 /** 468 * Used by persistent processes to determine if they are running on a 469 * higher-end device so should be okay using hardware drawing acceleration 470 * (which tends to consume a lot more RAM). 471 * @hide 472 */ 473 static public boolean isHighEndGfx() { 474 return !isLowRamDeviceStatic() && 475 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 476 } 477 478 /** 479 * Information you can set and retrieve about the current activity within the recent task list. 480 */ 481 public static class TaskDescription implements Parcelable { 482 private String mLabel; 483 private Bitmap mIcon; 484 private int mColorPrimary; 485 486 /** 487 * Creates the TaskDescription to the specified values. 488 * 489 * @param label A label and description of the current state of this task. 490 * @param icon An icon that represents the current state of this task. 491 * @param colorPrimary A color to override the theme's primary color. This color must be opaque. 492 */ 493 public TaskDescription(String label, Bitmap icon, int colorPrimary) { 494 if ((colorPrimary != 0) && (Color.alpha(colorPrimary) != 255)) { 495 throw new RuntimeException("A TaskDescription's primary color should be opaque"); 496 } 497 498 mLabel = label; 499 mIcon = icon; 500 mColorPrimary = colorPrimary; 501 } 502 503 /** 504 * Creates the TaskDescription to the specified values. 505 * 506 * @param label A label and description of the current state of this activity. 507 * @param icon An icon that represents the current state of this activity. 508 */ 509 public TaskDescription(String label, Bitmap icon) { 510 this(label, icon, 0); 511 } 512 513 /** 514 * Creates the TaskDescription to the specified values. 515 * 516 * @param label A label and description of the current state of this activity. 517 */ 518 public TaskDescription(String label) { 519 this(label, null, 0); 520 } 521 522 /** 523 * Creates an empty TaskDescription. 524 */ 525 public TaskDescription() { 526 this(null, null, 0); 527 } 528 529 /** 530 * Creates a copy of another TaskDescription. 531 */ 532 public TaskDescription(TaskDescription td) { 533 this(td.getLabel(), td.getIcon(), td.getPrimaryColor()); 534 } 535 536 private TaskDescription(Parcel source) { 537 readFromParcel(source); 538 } 539 540 /** 541 * Sets the label for this task description. 542 * @hide 543 */ 544 public void setLabel(String label) { 545 mLabel = label; 546 } 547 548 /** 549 * Sets the primary color for this task description. 550 * @hide 551 */ 552 public void setPrimaryColor(int primaryColor) { 553 mColorPrimary = primaryColor; 554 } 555 556 /** 557 * Sets the icon for this task description. 558 * @hide 559 */ 560 public void setIcon(Bitmap icon) { 561 mIcon = icon; 562 } 563 564 /** 565 * @return The label and description of the current state of this task. 566 */ 567 public String getLabel() { 568 return mLabel; 569 } 570 571 /** 572 * @return The icon that represents the current state of this task. 573 */ 574 public Bitmap getIcon() { 575 return mIcon; 576 } 577 578 /** 579 * @return The color override on the theme's primary color. 580 */ 581 public int getPrimaryColor() { 582 return mColorPrimary; 583 } 584 585 @Override 586 public int describeContents() { 587 return 0; 588 } 589 590 @Override 591 public void writeToParcel(Parcel dest, int flags) { 592 if (mLabel == null) { 593 dest.writeInt(0); 594 } else { 595 dest.writeInt(1); 596 dest.writeString(mLabel); 597 } 598 if (mIcon == null) { 599 dest.writeInt(0); 600 } else { 601 dest.writeInt(1); 602 mIcon.writeToParcel(dest, 0); 603 } 604 dest.writeInt(mColorPrimary); 605 } 606 607 public void readFromParcel(Parcel source) { 608 mLabel = source.readInt() > 0 ? source.readString() : null; 609 mIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 610 mColorPrimary = source.readInt(); 611 } 612 613 public static final Creator<TaskDescription> CREATOR 614 = new Creator<TaskDescription>() { 615 public TaskDescription createFromParcel(Parcel source) { 616 return new TaskDescription(source); 617 } 618 public TaskDescription[] newArray(int size) { 619 return new TaskDescription[size]; 620 } 621 }; 622 623 @Override 624 public String toString() { 625 return "TaskDescription Label: " + mLabel + " Icon: " + mIcon + 626 " colorPrimary: " + mColorPrimary; 627 } 628 } 629 630 /** 631 * Information you can retrieve about tasks that the user has most recently 632 * started or visited. 633 */ 634 public static class RecentTaskInfo implements Parcelable { 635 /** 636 * If this task is currently running, this is the identifier for it. 637 * If it is not running, this will be -1. 638 */ 639 public int id; 640 641 /** 642 * The true identifier of this task, valid even if it is not running. 643 */ 644 public int persistentId; 645 646 /** 647 * The original Intent used to launch the task. You can use this 648 * Intent to re-launch the task (if it is no longer running) or bring 649 * the current task to the front. 650 */ 651 public Intent baseIntent; 652 653 /** 654 * If this task was started from an alias, this is the actual 655 * activity component that was initially started; the component of 656 * the baseIntent in this case is the name of the actual activity 657 * implementation that the alias referred to. Otherwise, this is null. 658 */ 659 public ComponentName origActivity; 660 661 /** 662 * Description of the task's last state. 663 */ 664 public CharSequence description; 665 666 /** 667 * The id of the ActivityStack this Task was on most recently. 668 * @hide 669 */ 670 public int stackId; 671 672 /** 673 * The id of the user the task was running as. 674 * @hide 675 */ 676 public int userId; 677 678 /** 679 * The last time this task was active. 680 * @hide 681 */ 682 public long lastActiveTime; 683 684 /** 685 * The recent activity values for the highest activity in the stack to have set the values. 686 * {@link Activity#setTaskDescription(android.app.ActivityManager.TaskDescription)}. 687 * 688 * @hide 689 */ 690 public TaskDescription taskDescription; 691 692 public RecentTaskInfo() { 693 } 694 695 @Override 696 public int describeContents() { 697 return 0; 698 } 699 700 @Override 701 public void writeToParcel(Parcel dest, int flags) { 702 dest.writeInt(id); 703 dest.writeInt(persistentId); 704 if (baseIntent != null) { 705 dest.writeInt(1); 706 baseIntent.writeToParcel(dest, 0); 707 } else { 708 dest.writeInt(0); 709 } 710 ComponentName.writeToParcel(origActivity, dest); 711 TextUtils.writeToParcel(description, dest, 712 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 713 if (taskDescription != null) { 714 dest.writeInt(1); 715 taskDescription.writeToParcel(dest, 0); 716 } else { 717 dest.writeInt(0); 718 } 719 dest.writeInt(stackId); 720 dest.writeInt(userId); 721 dest.writeLong(lastActiveTime); 722 } 723 724 public void readFromParcel(Parcel source) { 725 id = source.readInt(); 726 persistentId = source.readInt(); 727 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 728 origActivity = ComponentName.readFromParcel(source); 729 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 730 taskDescription = source.readInt() > 0 ? 731 TaskDescription.CREATOR.createFromParcel(source) : null; 732 stackId = source.readInt(); 733 userId = source.readInt(); 734 lastActiveTime = source.readLong(); 735 } 736 737 public static final Creator<RecentTaskInfo> CREATOR 738 = new Creator<RecentTaskInfo>() { 739 public RecentTaskInfo createFromParcel(Parcel source) { 740 return new RecentTaskInfo(source); 741 } 742 public RecentTaskInfo[] newArray(int size) { 743 return new RecentTaskInfo[size]; 744 } 745 }; 746 747 private RecentTaskInfo(Parcel source) { 748 readFromParcel(source); 749 } 750 } 751 752 /** 753 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 754 * that have set their 755 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 756 */ 757 public static final int RECENT_WITH_EXCLUDED = 0x0001; 758 759 /** 760 * Provides a list that does not contain any 761 * recent tasks that currently are not available to the user. 762 */ 763 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 764 765 /** 766 * Provides a list that contains recent tasks for all 767 * profiles of a user. 768 * @hide 769 */ 770 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 771 772 /** 773 * <p></p>Return a list of the tasks that the user has recently launched, with 774 * the most recent being first and older ones after in order. 775 * 776 * <p><b>Note: this method is only intended for debugging and presenting 777 * task management user interfaces</b>. This should never be used for 778 * core logic in an application, such as deciding between different 779 * behaviors based on the information found here. Such uses are 780 * <em>not</em> supported, and will likely break in the future. For 781 * example, if multiple applications can be actively running at the 782 * same time, assumptions made about the meaning of the data here for 783 * purposes of control flow will be incorrect.</p> 784 * 785 * @deprecated As of {@link android.os.Build.VERSION_CODES#L}, this method is 786 * no longer available to third party applications: as the introduction of 787 * document-centric recents means 788 * it can leak personal information to the caller. For backwards compatibility, 789 * it will still return a small subset of its data: at least the caller's 790 * own tasks (though see {@link #getAppTasks()} for the correct supported 791 * way to retrieve that information), and possibly some other tasks 792 * such as home that are known to not be sensitive. 793 * 794 * @param maxNum The maximum number of entries to return in the list. The 795 * actual number returned may be smaller, depending on how many tasks the 796 * user has started and the maximum number the system can remember. 797 * @param flags Information about what to return. May be any combination 798 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 799 * 800 * @return Returns a list of RecentTaskInfo records describing each of 801 * the recent tasks. 802 * 803 * @throws SecurityException Throws SecurityException if the caller does 804 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 805 */ 806 @Deprecated 807 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 808 throws SecurityException { 809 try { 810 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 811 flags, UserHandle.myUserId()); 812 } catch (RemoteException e) { 813 // System dead, we will be dead too soon! 814 return null; 815 } 816 } 817 818 /** 819 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 820 * specific user. It requires holding 821 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 822 * @param maxNum The maximum number of entries to return in the list. The 823 * actual number returned may be smaller, depending on how many tasks the 824 * user has started and the maximum number the system can remember. 825 * @param flags Information about what to return. May be any combination 826 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 827 * 828 * @return Returns a list of RecentTaskInfo records describing each of 829 * the recent tasks. 830 * 831 * @throws SecurityException Throws SecurityException if the caller does 832 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 833 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 834 * @hide 835 */ 836 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 837 throws SecurityException { 838 try { 839 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 840 flags, userId); 841 } catch (RemoteException e) { 842 // System dead, we will be dead too soon! 843 return null; 844 } 845 } 846 847 /** 848 * Information you can retrieve about a particular task that is currently 849 * "running" in the system. Note that a running task does not mean the 850 * given task actually has a process it is actively running in; it simply 851 * means that the user has gone to it and never closed it, but currently 852 * the system may have killed its process and is only holding on to its 853 * last state in order to restart it when the user returns. 854 */ 855 public static class RunningTaskInfo implements Parcelable { 856 /** 857 * A unique identifier for this task. 858 */ 859 public int id; 860 861 /** 862 * The component launched as the first activity in the task. This can 863 * be considered the "application" of this task. 864 */ 865 public ComponentName baseActivity; 866 867 /** 868 * The activity component at the top of the history stack of the task. 869 * This is what the user is currently doing. 870 */ 871 public ComponentName topActivity; 872 873 /** 874 * Thumbnail representation of the task's current state. Currently 875 * always null. 876 */ 877 public Bitmap thumbnail; 878 879 /** 880 * Description of the task's current state. 881 */ 882 public CharSequence description; 883 884 /** 885 * Number of activities in this task. 886 */ 887 public int numActivities; 888 889 /** 890 * Number of activities that are currently running (not stopped 891 * and persisted) in this task. 892 */ 893 public int numRunning; 894 895 /** 896 * Last time task was run. For sorting. 897 * @hide 898 */ 899 public long lastActiveTime; 900 901 public RunningTaskInfo() { 902 } 903 904 public int describeContents() { 905 return 0; 906 } 907 908 public void writeToParcel(Parcel dest, int flags) { 909 dest.writeInt(id); 910 ComponentName.writeToParcel(baseActivity, dest); 911 ComponentName.writeToParcel(topActivity, dest); 912 if (thumbnail != null) { 913 dest.writeInt(1); 914 thumbnail.writeToParcel(dest, 0); 915 } else { 916 dest.writeInt(0); 917 } 918 TextUtils.writeToParcel(description, dest, 919 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 920 dest.writeInt(numActivities); 921 dest.writeInt(numRunning); 922 } 923 924 public void readFromParcel(Parcel source) { 925 id = source.readInt(); 926 baseActivity = ComponentName.readFromParcel(source); 927 topActivity = ComponentName.readFromParcel(source); 928 if (source.readInt() != 0) { 929 thumbnail = Bitmap.CREATOR.createFromParcel(source); 930 } else { 931 thumbnail = null; 932 } 933 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 934 numActivities = source.readInt(); 935 numRunning = source.readInt(); 936 } 937 938 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 939 public RunningTaskInfo createFromParcel(Parcel source) { 940 return new RunningTaskInfo(source); 941 } 942 public RunningTaskInfo[] newArray(int size) { 943 return new RunningTaskInfo[size]; 944 } 945 }; 946 947 private RunningTaskInfo(Parcel source) { 948 readFromParcel(source); 949 } 950 } 951 952 /** 953 * Get the list of tasks associated with the calling application. 954 * 955 * @return The list of tasks associated with the application making this call. 956 * @throws SecurityException 957 */ 958 public List<ActivityManager.AppTask> getAppTasks() { 959 ArrayList<AppTask> tasks = new ArrayList<AppTask>(); 960 List<IAppTask> appTasks; 961 try { 962 appTasks = ActivityManagerNative.getDefault().getAppTasks(); 963 } catch (RemoteException e) { 964 // System dead, we will be dead too soon! 965 return null; 966 } 967 int numAppTasks = appTasks.size(); 968 for (int i = 0; i < numAppTasks; i++) { 969 tasks.add(new AppTask(appTasks.get(i))); 970 } 971 return tasks; 972 } 973 974 /** 975 * Return a list of the tasks that are currently running, with 976 * the most recent being first and older ones after in order. Note that 977 * "running" does not mean any of the task's code is currently loaded or 978 * activity -- the task may have been frozen by the system, so that it 979 * can be restarted in its previous state when next brought to the 980 * foreground. 981 * 982 * <p><b>Note: this method is only intended for debugging and presenting 983 * task management user interfaces</b>. This should never be used for 984 * core logic in an application, such as deciding between different 985 * behaviors based on the information found here. Such uses are 986 * <em>not</em> supported, and will likely break in the future. For 987 * example, if multiple applications can be actively running at the 988 * same time, assumptions made about the meaning of the data here for 989 * purposes of control flow will be incorrect.</p> 990 * 991 * @deprecated As of {@link android.os.Build.VERSION_CODES#L}, this method 992 * is no longer available to third party 993 * applications: the introduction of document-centric recents means 994 * it can leak person information to the caller. For backwards compatibility, 995 * it will still retu rn a small subset of its data: at least the caller's 996 * own tasks, and possibly some other tasks 997 * such as home that are known to not be sensitive. 998 * 999 * @param maxNum The maximum number of entries to return in the list. The 1000 * actual number returned may be smaller, depending on how many tasks the 1001 * user has started. 1002 * 1003 * @return Returns a list of RunningTaskInfo records describing each of 1004 * the running tasks. 1005 * 1006 * @throws SecurityException Throws SecurityException if the caller does 1007 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 1008 */ 1009 @Deprecated 1010 public List<RunningTaskInfo> getRunningTasks(int maxNum) 1011 throws SecurityException { 1012 try { 1013 return ActivityManagerNative.getDefault().getTasks(maxNum, 0); 1014 } catch (RemoteException e) { 1015 // System dead, we will be dead too soon! 1016 return null; 1017 } 1018 } 1019 1020 /** 1021 * Remove some end of a task's activity stack that is not part of 1022 * the main application. The selected activities will be finished, so 1023 * they are no longer part of the main task. 1024 * 1025 * @param taskId The identifier of the task. 1026 * @param subTaskIndex The number of the sub-task; this corresponds 1027 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 1028 * @return Returns true if the sub-task was found and was removed. 1029 * 1030 * @hide 1031 */ 1032 public boolean removeSubTask(int taskId, int subTaskIndex) 1033 throws SecurityException { 1034 try { 1035 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 1036 } catch (RemoteException e) { 1037 // System dead, we will be dead too soon! 1038 return false; 1039 } 1040 } 1041 1042 /** 1043 * If set, the process of the root activity of the task will be killed 1044 * as part of removing the task. 1045 * @hide 1046 */ 1047 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 1048 1049 /** 1050 * Completely remove the given task. 1051 * 1052 * @param taskId Identifier of the task to be removed. 1053 * @param flags Additional operational flags. May be 0 or 1054 * {@link #REMOVE_TASK_KILL_PROCESS}. 1055 * @return Returns true if the given task was found and removed. 1056 * 1057 * @hide 1058 */ 1059 public boolean removeTask(int taskId, int flags) 1060 throws SecurityException { 1061 try { 1062 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 1063 } catch (RemoteException e) { 1064 // System dead, we will be dead too soon! 1065 return false; 1066 } 1067 } 1068 1069 /** @hide */ 1070 public static class TaskThumbnails implements Parcelable { 1071 public Bitmap mainThumbnail; 1072 1073 public int numSubThumbbails; 1074 1075 /** @hide */ 1076 public IThumbnailRetriever retriever; 1077 1078 public TaskThumbnails() { 1079 } 1080 1081 public Bitmap getSubThumbnail(int index) { 1082 try { 1083 return retriever.getThumbnail(index); 1084 } catch (RemoteException e) { 1085 return null; 1086 } 1087 } 1088 1089 public int describeContents() { 1090 return 0; 1091 } 1092 1093 public void writeToParcel(Parcel dest, int flags) { 1094 if (mainThumbnail != null) { 1095 dest.writeInt(1); 1096 mainThumbnail.writeToParcel(dest, 0); 1097 } else { 1098 dest.writeInt(0); 1099 } 1100 dest.writeInt(numSubThumbbails); 1101 dest.writeStrongInterface(retriever); 1102 } 1103 1104 public void readFromParcel(Parcel source) { 1105 if (source.readInt() != 0) { 1106 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 1107 } else { 1108 mainThumbnail = null; 1109 } 1110 numSubThumbbails = source.readInt(); 1111 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 1112 } 1113 1114 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 1115 public TaskThumbnails createFromParcel(Parcel source) { 1116 return new TaskThumbnails(source); 1117 } 1118 public TaskThumbnails[] newArray(int size) { 1119 return new TaskThumbnails[size]; 1120 } 1121 }; 1122 1123 private TaskThumbnails(Parcel source) { 1124 readFromParcel(source); 1125 } 1126 } 1127 1128 /** @hide */ 1129 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 1130 try { 1131 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 1132 } catch (RemoteException e) { 1133 // System dead, we will be dead too soon! 1134 return null; 1135 } 1136 } 1137 1138 /** @hide */ 1139 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 1140 try { 1141 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 1142 } catch (RemoteException e) { 1143 // System dead, we will be dead too soon! 1144 return null; 1145 } 1146 } 1147 1148 /** @hide */ 1149 public boolean isInHomeStack(int taskId) { 1150 try { 1151 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 1152 } catch (RemoteException e) { 1153 // System dead, we will be dead too soon! 1154 return false; 1155 } 1156 } 1157 1158 /** 1159 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 1160 * activity along with the task, so it is positioned immediately behind 1161 * the task. 1162 */ 1163 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 1164 1165 /** 1166 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 1167 * user-instigated action, so the current activity will not receive a 1168 * hint that the user is leaving. 1169 */ 1170 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 1171 1172 /** 1173 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1174 * with a null options argument. 1175 * 1176 * @param taskId The identifier of the task to be moved, as found in 1177 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1178 * @param flags Additional operational flags, 0 or more of 1179 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1180 */ 1181 public void moveTaskToFront(int taskId, int flags) { 1182 moveTaskToFront(taskId, flags, null); 1183 } 1184 1185 /** 1186 * Ask that the task associated with a given task ID be moved to the 1187 * front of the stack, so it is now visible to the user. Requires that 1188 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1189 * or a SecurityException will be thrown. 1190 * 1191 * @param taskId The identifier of the task to be moved, as found in 1192 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1193 * @param flags Additional operational flags, 0 or more of 1194 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1195 * @param options Additional options for the operation, either null or 1196 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1197 * Context.startActivity(Intent, Bundle)}. 1198 */ 1199 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1200 try { 1201 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1202 } catch (RemoteException e) { 1203 // System dead, we will be dead too soon! 1204 } 1205 } 1206 1207 /** 1208 * Information you can retrieve about a particular Service that is 1209 * currently running in the system. 1210 */ 1211 public static class RunningServiceInfo implements Parcelable { 1212 /** 1213 * The service component. 1214 */ 1215 public ComponentName service; 1216 1217 /** 1218 * If non-zero, this is the process the service is running in. 1219 */ 1220 public int pid; 1221 1222 /** 1223 * The UID that owns this service. 1224 */ 1225 public int uid; 1226 1227 /** 1228 * The name of the process this service runs in. 1229 */ 1230 public String process; 1231 1232 /** 1233 * Set to true if the service has asked to run as a foreground process. 1234 */ 1235 public boolean foreground; 1236 1237 /** 1238 * The time when the service was first made active, either by someone 1239 * starting or binding to it. This 1240 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1241 */ 1242 public long activeSince; 1243 1244 /** 1245 * Set to true if this service has been explicitly started. 1246 */ 1247 public boolean started; 1248 1249 /** 1250 * Number of clients connected to the service. 1251 */ 1252 public int clientCount; 1253 1254 /** 1255 * Number of times the service's process has crashed while the service 1256 * is running. 1257 */ 1258 public int crashCount; 1259 1260 /** 1261 * The time when there was last activity in the service (either 1262 * explicit requests to start it or clients binding to it). This 1263 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1264 */ 1265 public long lastActivityTime; 1266 1267 /** 1268 * If non-zero, this service is not currently running, but scheduled to 1269 * restart at the given time. 1270 */ 1271 public long restarting; 1272 1273 /** 1274 * Bit for {@link #flags}: set if this service has been 1275 * explicitly started. 1276 */ 1277 public static final int FLAG_STARTED = 1<<0; 1278 1279 /** 1280 * Bit for {@link #flags}: set if the service has asked to 1281 * run as a foreground process. 1282 */ 1283 public static final int FLAG_FOREGROUND = 1<<1; 1284 1285 /** 1286 * Bit for {@link #flags): set if the service is running in a 1287 * core system process. 1288 */ 1289 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1290 1291 /** 1292 * Bit for {@link #flags): set if the service is running in a 1293 * persistent process. 1294 */ 1295 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1296 1297 /** 1298 * Running flags. 1299 */ 1300 public int flags; 1301 1302 /** 1303 * For special services that are bound to by system code, this is 1304 * the package that holds the binding. 1305 */ 1306 public String clientPackage; 1307 1308 /** 1309 * For special services that are bound to by system code, this is 1310 * a string resource providing a user-visible label for who the 1311 * client is. 1312 */ 1313 public int clientLabel; 1314 1315 public RunningServiceInfo() { 1316 } 1317 1318 public int describeContents() { 1319 return 0; 1320 } 1321 1322 public void writeToParcel(Parcel dest, int flags) { 1323 ComponentName.writeToParcel(service, dest); 1324 dest.writeInt(pid); 1325 dest.writeInt(uid); 1326 dest.writeString(process); 1327 dest.writeInt(foreground ? 1 : 0); 1328 dest.writeLong(activeSince); 1329 dest.writeInt(started ? 1 : 0); 1330 dest.writeInt(clientCount); 1331 dest.writeInt(crashCount); 1332 dest.writeLong(lastActivityTime); 1333 dest.writeLong(restarting); 1334 dest.writeInt(this.flags); 1335 dest.writeString(clientPackage); 1336 dest.writeInt(clientLabel); 1337 } 1338 1339 public void readFromParcel(Parcel source) { 1340 service = ComponentName.readFromParcel(source); 1341 pid = source.readInt(); 1342 uid = source.readInt(); 1343 process = source.readString(); 1344 foreground = source.readInt() != 0; 1345 activeSince = source.readLong(); 1346 started = source.readInt() != 0; 1347 clientCount = source.readInt(); 1348 crashCount = source.readInt(); 1349 lastActivityTime = source.readLong(); 1350 restarting = source.readLong(); 1351 flags = source.readInt(); 1352 clientPackage = source.readString(); 1353 clientLabel = source.readInt(); 1354 } 1355 1356 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1357 public RunningServiceInfo createFromParcel(Parcel source) { 1358 return new RunningServiceInfo(source); 1359 } 1360 public RunningServiceInfo[] newArray(int size) { 1361 return new RunningServiceInfo[size]; 1362 } 1363 }; 1364 1365 private RunningServiceInfo(Parcel source) { 1366 readFromParcel(source); 1367 } 1368 } 1369 1370 /** 1371 * Return a list of the services that are currently running. 1372 * 1373 * <p><b>Note: this method is only intended for debugging or implementing 1374 * service management type user interfaces.</b></p> 1375 * 1376 * @param maxNum The maximum number of entries to return in the list. The 1377 * actual number returned may be smaller, depending on how many services 1378 * are running. 1379 * 1380 * @return Returns a list of RunningServiceInfo records describing each of 1381 * the running tasks. 1382 */ 1383 public List<RunningServiceInfo> getRunningServices(int maxNum) 1384 throws SecurityException { 1385 try { 1386 return ActivityManagerNative.getDefault() 1387 .getServices(maxNum, 0); 1388 } catch (RemoteException e) { 1389 // System dead, we will be dead too soon! 1390 return null; 1391 } 1392 } 1393 1394 /** 1395 * Returns a PendingIntent you can start to show a control panel for the 1396 * given running service. If the service does not have a control panel, 1397 * null is returned. 1398 */ 1399 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1400 throws SecurityException { 1401 try { 1402 return ActivityManagerNative.getDefault() 1403 .getRunningServiceControlPanel(service); 1404 } catch (RemoteException e) { 1405 // System dead, we will be dead too soon! 1406 return null; 1407 } 1408 } 1409 1410 /** 1411 * Information you can retrieve about the available memory through 1412 * {@link ActivityManager#getMemoryInfo}. 1413 */ 1414 public static class MemoryInfo implements Parcelable { 1415 /** 1416 * The available memory on the system. This number should not 1417 * be considered absolute: due to the nature of the kernel, a significant 1418 * portion of this memory is actually in use and needed for the overall 1419 * system to run well. 1420 */ 1421 public long availMem; 1422 1423 /** 1424 * The total memory accessible by the kernel. This is basically the 1425 * RAM size of the device, not including below-kernel fixed allocations 1426 * like DMA buffers, RAM for the baseband CPU, etc. 1427 */ 1428 public long totalMem; 1429 1430 /** 1431 * The threshold of {@link #availMem} at which we consider memory to be 1432 * low and start killing background services and other non-extraneous 1433 * processes. 1434 */ 1435 public long threshold; 1436 1437 /** 1438 * Set to true if the system considers itself to currently be in a low 1439 * memory situation. 1440 */ 1441 public boolean lowMemory; 1442 1443 /** @hide */ 1444 public long hiddenAppThreshold; 1445 /** @hide */ 1446 public long secondaryServerThreshold; 1447 /** @hide */ 1448 public long visibleAppThreshold; 1449 /** @hide */ 1450 public long foregroundAppThreshold; 1451 1452 public MemoryInfo() { 1453 } 1454 1455 public int describeContents() { 1456 return 0; 1457 } 1458 1459 public void writeToParcel(Parcel dest, int flags) { 1460 dest.writeLong(availMem); 1461 dest.writeLong(totalMem); 1462 dest.writeLong(threshold); 1463 dest.writeInt(lowMemory ? 1 : 0); 1464 dest.writeLong(hiddenAppThreshold); 1465 dest.writeLong(secondaryServerThreshold); 1466 dest.writeLong(visibleAppThreshold); 1467 dest.writeLong(foregroundAppThreshold); 1468 } 1469 1470 public void readFromParcel(Parcel source) { 1471 availMem = source.readLong(); 1472 totalMem = source.readLong(); 1473 threshold = source.readLong(); 1474 lowMemory = source.readInt() != 0; 1475 hiddenAppThreshold = source.readLong(); 1476 secondaryServerThreshold = source.readLong(); 1477 visibleAppThreshold = source.readLong(); 1478 foregroundAppThreshold = source.readLong(); 1479 } 1480 1481 public static final Creator<MemoryInfo> CREATOR 1482 = new Creator<MemoryInfo>() { 1483 public MemoryInfo createFromParcel(Parcel source) { 1484 return new MemoryInfo(source); 1485 } 1486 public MemoryInfo[] newArray(int size) { 1487 return new MemoryInfo[size]; 1488 } 1489 }; 1490 1491 private MemoryInfo(Parcel source) { 1492 readFromParcel(source); 1493 } 1494 } 1495 1496 /** 1497 * Return general information about the memory state of the system. This 1498 * can be used to help decide how to manage your own memory, though note 1499 * that polling is not recommended and 1500 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1501 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1502 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1503 * level of your process as needed, which gives a better hint for how to 1504 * manage its memory. 1505 */ 1506 public void getMemoryInfo(MemoryInfo outInfo) { 1507 try { 1508 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1509 } catch (RemoteException e) { 1510 } 1511 } 1512 1513 /** 1514 * Information you can retrieve about an ActivityStack in the system. 1515 * @hide 1516 */ 1517 public static class StackInfo implements Parcelable { 1518 public int stackId; 1519 public Rect bounds = new Rect(); 1520 public int[] taskIds; 1521 public String[] taskNames; 1522 public int displayId; 1523 1524 @Override 1525 public int describeContents() { 1526 return 0; 1527 } 1528 1529 @Override 1530 public void writeToParcel(Parcel dest, int flags) { 1531 dest.writeInt(stackId); 1532 dest.writeInt(bounds.left); 1533 dest.writeInt(bounds.top); 1534 dest.writeInt(bounds.right); 1535 dest.writeInt(bounds.bottom); 1536 dest.writeIntArray(taskIds); 1537 dest.writeStringArray(taskNames); 1538 dest.writeInt(displayId); 1539 } 1540 1541 public void readFromParcel(Parcel source) { 1542 stackId = source.readInt(); 1543 bounds = new Rect( 1544 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1545 taskIds = source.createIntArray(); 1546 taskNames = source.createStringArray(); 1547 displayId = source.readInt(); 1548 } 1549 1550 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1551 @Override 1552 public StackInfo createFromParcel(Parcel source) { 1553 return new StackInfo(source); 1554 } 1555 @Override 1556 public StackInfo[] newArray(int size) { 1557 return new StackInfo[size]; 1558 } 1559 }; 1560 1561 public StackInfo() { 1562 } 1563 1564 private StackInfo(Parcel source) { 1565 readFromParcel(source); 1566 } 1567 1568 public String toString(String prefix) { 1569 StringBuilder sb = new StringBuilder(256); 1570 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1571 sb.append(" bounds="); sb.append(bounds.toShortString()); 1572 sb.append(" displayId="); sb.append(displayId); 1573 sb.append("\n"); 1574 prefix = prefix + " "; 1575 for (int i = 0; i < taskIds.length; ++i) { 1576 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1577 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1578 } 1579 return sb.toString(); 1580 } 1581 1582 @Override 1583 public String toString() { 1584 return toString(""); 1585 } 1586 } 1587 1588 /** 1589 * @hide 1590 */ 1591 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1592 try { 1593 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1594 observer, UserHandle.myUserId()); 1595 } catch (RemoteException e) { 1596 return false; 1597 } 1598 } 1599 1600 /** 1601 * Permits an application to erase its own data from disk. This is equivalent to 1602 * the user choosing to clear the app's data from within the device settings UI. It 1603 * erases all dynamic data associated with the app -- its private data and data in its 1604 * private area on external storage -- but does not remove the installed application 1605 * itself, nor any OBB files. 1606 * 1607 * @return {@code true} if the application successfully requested that the application's 1608 * data be erased; {@code false} otherwise. 1609 */ 1610 public boolean clearApplicationUserData() { 1611 return clearApplicationUserData(mContext.getPackageName(), null); 1612 } 1613 1614 /** 1615 * Information you can retrieve about any processes that are in an error condition. 1616 */ 1617 public static class ProcessErrorStateInfo implements Parcelable { 1618 /** 1619 * Condition codes 1620 */ 1621 public static final int NO_ERROR = 0; 1622 public static final int CRASHED = 1; 1623 public static final int NOT_RESPONDING = 2; 1624 1625 /** 1626 * The condition that the process is in. 1627 */ 1628 public int condition; 1629 1630 /** 1631 * The process name in which the crash or error occurred. 1632 */ 1633 public String processName; 1634 1635 /** 1636 * The pid of this process; 0 if none 1637 */ 1638 public int pid; 1639 1640 /** 1641 * The kernel user-ID that has been assigned to this process; 1642 * currently this is not a unique ID (multiple applications can have 1643 * the same uid). 1644 */ 1645 public int uid; 1646 1647 /** 1648 * The activity name associated with the error, if known. May be null. 1649 */ 1650 public String tag; 1651 1652 /** 1653 * A short message describing the error condition. 1654 */ 1655 public String shortMsg; 1656 1657 /** 1658 * A long message describing the error condition. 1659 */ 1660 public String longMsg; 1661 1662 /** 1663 * The stack trace where the error originated. May be null. 1664 */ 1665 public String stackTrace; 1666 1667 /** 1668 * to be deprecated: This value will always be null. 1669 */ 1670 public byte[] crashData = null; 1671 1672 public ProcessErrorStateInfo() { 1673 } 1674 1675 @Override 1676 public int describeContents() { 1677 return 0; 1678 } 1679 1680 @Override 1681 public void writeToParcel(Parcel dest, int flags) { 1682 dest.writeInt(condition); 1683 dest.writeString(processName); 1684 dest.writeInt(pid); 1685 dest.writeInt(uid); 1686 dest.writeString(tag); 1687 dest.writeString(shortMsg); 1688 dest.writeString(longMsg); 1689 dest.writeString(stackTrace); 1690 } 1691 1692 public void readFromParcel(Parcel source) { 1693 condition = source.readInt(); 1694 processName = source.readString(); 1695 pid = source.readInt(); 1696 uid = source.readInt(); 1697 tag = source.readString(); 1698 shortMsg = source.readString(); 1699 longMsg = source.readString(); 1700 stackTrace = source.readString(); 1701 } 1702 1703 public static final Creator<ProcessErrorStateInfo> CREATOR = 1704 new Creator<ProcessErrorStateInfo>() { 1705 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1706 return new ProcessErrorStateInfo(source); 1707 } 1708 public ProcessErrorStateInfo[] newArray(int size) { 1709 return new ProcessErrorStateInfo[size]; 1710 } 1711 }; 1712 1713 private ProcessErrorStateInfo(Parcel source) { 1714 readFromParcel(source); 1715 } 1716 } 1717 1718 /** 1719 * Returns a list of any processes that are currently in an error condition. The result 1720 * will be null if all processes are running properly at this time. 1721 * 1722 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1723 * current error conditions (it will not return an empty list). This list ordering is not 1724 * specified. 1725 */ 1726 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1727 try { 1728 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1729 } catch (RemoteException e) { 1730 return null; 1731 } 1732 } 1733 1734 /** 1735 * Information you can retrieve about a running process. 1736 */ 1737 public static class RunningAppProcessInfo implements Parcelable { 1738 /** 1739 * The name of the process that this object is associated with 1740 */ 1741 public String processName; 1742 1743 /** 1744 * The pid of this process; 0 if none 1745 */ 1746 public int pid; 1747 1748 /** 1749 * The user id of this process. 1750 */ 1751 public int uid; 1752 1753 /** 1754 * All packages that have been loaded into the process. 1755 */ 1756 public String pkgList[]; 1757 1758 /** 1759 * Constant for {@link #flags}: this is an app that is unable to 1760 * correctly save its state when going to the background, 1761 * so it can not be killed while in the background. 1762 * @hide 1763 */ 1764 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1765 1766 /** 1767 * Constant for {@link #flags}: this process is associated with a 1768 * persistent system app. 1769 * @hide 1770 */ 1771 public static final int FLAG_PERSISTENT = 1<<1; 1772 1773 /** 1774 * Constant for {@link #flags}: this process is associated with a 1775 * persistent system app. 1776 * @hide 1777 */ 1778 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1779 1780 /** 1781 * Flags of information. May be any of 1782 * {@link #FLAG_CANT_SAVE_STATE}. 1783 * @hide 1784 */ 1785 public int flags; 1786 1787 /** 1788 * Last memory trim level reported to the process: corresponds to 1789 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1790 * ComponentCallbacks2.onTrimMemory(int)}. 1791 */ 1792 public int lastTrimLevel; 1793 1794 /** 1795 * Constant for {@link #importance}: this process is running the 1796 * foreground UI. 1797 */ 1798 public static final int IMPORTANCE_FOREGROUND = 100; 1799 1800 /** 1801 * Constant for {@link #importance}: this process is running something 1802 * that is actively visible to the user, though not in the immediate 1803 * foreground. 1804 */ 1805 public static final int IMPORTANCE_VISIBLE = 200; 1806 1807 /** 1808 * Constant for {@link #importance}: this process is running something 1809 * that is considered to be actively perceptible to the user. An 1810 * example would be an application performing background music playback. 1811 */ 1812 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1813 1814 /** 1815 * Constant for {@link #importance}: this process is running an 1816 * application that can not save its state, and thus can't be killed 1817 * while in the background. 1818 * @hide 1819 */ 1820 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1821 1822 /** 1823 * Constant for {@link #importance}: this process is contains services 1824 * that should remain running. 1825 */ 1826 public static final int IMPORTANCE_SERVICE = 300; 1827 1828 /** 1829 * Constant for {@link #importance}: this process process contains 1830 * background code that is expendable. 1831 */ 1832 public static final int IMPORTANCE_BACKGROUND = 400; 1833 1834 /** 1835 * Constant for {@link #importance}: this process is empty of any 1836 * actively running code. 1837 */ 1838 public static final int IMPORTANCE_EMPTY = 500; 1839 1840 /** 1841 * The relative importance level that the system places on this 1842 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1843 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1844 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1845 * constants are numbered so that "more important" values are always 1846 * smaller than "less important" values. 1847 */ 1848 public int importance; 1849 1850 /** 1851 * An additional ordering within a particular {@link #importance} 1852 * category, providing finer-grained information about the relative 1853 * utility of processes within a category. This number means nothing 1854 * except that a smaller values are more recently used (and thus 1855 * more important). Currently an LRU value is only maintained for 1856 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1857 * be maintained in the future. 1858 */ 1859 public int lru; 1860 1861 /** 1862 * Constant for {@link #importanceReasonCode}: nothing special has 1863 * been specified for the reason for this level. 1864 */ 1865 public static final int REASON_UNKNOWN = 0; 1866 1867 /** 1868 * Constant for {@link #importanceReasonCode}: one of the application's 1869 * content providers is being used by another process. The pid of 1870 * the client process is in {@link #importanceReasonPid} and the 1871 * target provider in this process is in 1872 * {@link #importanceReasonComponent}. 1873 */ 1874 public static final int REASON_PROVIDER_IN_USE = 1; 1875 1876 /** 1877 * Constant for {@link #importanceReasonCode}: one of the application's 1878 * content providers is being used by another process. The pid of 1879 * the client process is in {@link #importanceReasonPid} and the 1880 * target provider in this process is in 1881 * {@link #importanceReasonComponent}. 1882 */ 1883 public static final int REASON_SERVICE_IN_USE = 2; 1884 1885 /** 1886 * The reason for {@link #importance}, if any. 1887 */ 1888 public int importanceReasonCode; 1889 1890 /** 1891 * For the specified values of {@link #importanceReasonCode}, this 1892 * is the process ID of the other process that is a client of this 1893 * process. This will be 0 if no other process is using this one. 1894 */ 1895 public int importanceReasonPid; 1896 1897 /** 1898 * For the specified values of {@link #importanceReasonCode}, this 1899 * is the name of the component that is being used in this process. 1900 */ 1901 public ComponentName importanceReasonComponent; 1902 1903 /** 1904 * When {@link #importanceReasonPid} is non-0, this is the importance 1905 * of the other pid. @hide 1906 */ 1907 public int importanceReasonImportance; 1908 1909 /** 1910 * Current process state, as per PROCESS_STATE_* constants. 1911 * @hide 1912 */ 1913 public int processState; 1914 1915 public RunningAppProcessInfo() { 1916 importance = IMPORTANCE_FOREGROUND; 1917 importanceReasonCode = REASON_UNKNOWN; 1918 processState = PROCESS_STATE_IMPORTANT_FOREGROUND; 1919 } 1920 1921 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1922 processName = pProcessName; 1923 pid = pPid; 1924 pkgList = pArr; 1925 } 1926 1927 public int describeContents() { 1928 return 0; 1929 } 1930 1931 public void writeToParcel(Parcel dest, int flags) { 1932 dest.writeString(processName); 1933 dest.writeInt(pid); 1934 dest.writeInt(uid); 1935 dest.writeStringArray(pkgList); 1936 dest.writeInt(this.flags); 1937 dest.writeInt(lastTrimLevel); 1938 dest.writeInt(importance); 1939 dest.writeInt(lru); 1940 dest.writeInt(importanceReasonCode); 1941 dest.writeInt(importanceReasonPid); 1942 ComponentName.writeToParcel(importanceReasonComponent, dest); 1943 dest.writeInt(importanceReasonImportance); 1944 dest.writeInt(processState); 1945 } 1946 1947 public void readFromParcel(Parcel source) { 1948 processName = source.readString(); 1949 pid = source.readInt(); 1950 uid = source.readInt(); 1951 pkgList = source.readStringArray(); 1952 flags = source.readInt(); 1953 lastTrimLevel = source.readInt(); 1954 importance = source.readInt(); 1955 lru = source.readInt(); 1956 importanceReasonCode = source.readInt(); 1957 importanceReasonPid = source.readInt(); 1958 importanceReasonComponent = ComponentName.readFromParcel(source); 1959 importanceReasonImportance = source.readInt(); 1960 processState = source.readInt(); 1961 } 1962 1963 public static final Creator<RunningAppProcessInfo> CREATOR = 1964 new Creator<RunningAppProcessInfo>() { 1965 public RunningAppProcessInfo createFromParcel(Parcel source) { 1966 return new RunningAppProcessInfo(source); 1967 } 1968 public RunningAppProcessInfo[] newArray(int size) { 1969 return new RunningAppProcessInfo[size]; 1970 } 1971 }; 1972 1973 private RunningAppProcessInfo(Parcel source) { 1974 readFromParcel(source); 1975 } 1976 } 1977 1978 /** 1979 * Returns a list of application processes installed on external media 1980 * that are running on the device. 1981 * 1982 * <p><b>Note: this method is only intended for debugging or building 1983 * a user-facing process management UI.</b></p> 1984 * 1985 * @return Returns a list of ApplicationInfo records, or null if none 1986 * This list ordering is not specified. 1987 * @hide 1988 */ 1989 public List<ApplicationInfo> getRunningExternalApplications() { 1990 try { 1991 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1992 } catch (RemoteException e) { 1993 return null; 1994 } 1995 } 1996 1997 /** 1998 * Returns a list of application processes that are running on the device. 1999 * 2000 * <p><b>Note: this method is only intended for debugging or building 2001 * a user-facing process management UI.</b></p> 2002 * 2003 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 2004 * running processes (it will not return an empty list). This list ordering is not 2005 * specified. 2006 */ 2007 public List<RunningAppProcessInfo> getRunningAppProcesses() { 2008 try { 2009 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 2010 } catch (RemoteException e) { 2011 return null; 2012 } 2013 } 2014 2015 /** 2016 * Return global memory state information for the calling process. This 2017 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 2018 * only fields that will be filled in are 2019 * {@link RunningAppProcessInfo#pid}, 2020 * {@link RunningAppProcessInfo#uid}, 2021 * {@link RunningAppProcessInfo#lastTrimLevel}, 2022 * {@link RunningAppProcessInfo#importance}, 2023 * {@link RunningAppProcessInfo#lru}, and 2024 * {@link RunningAppProcessInfo#importanceReasonCode}. 2025 */ 2026 static public void getMyMemoryState(RunningAppProcessInfo outState) { 2027 try { 2028 ActivityManagerNative.getDefault().getMyMemoryState(outState); 2029 } catch (RemoteException e) { 2030 } 2031 } 2032 2033 /** 2034 * Return information about the memory usage of one or more processes. 2035 * 2036 * <p><b>Note: this method is only intended for debugging or building 2037 * a user-facing process management UI.</b></p> 2038 * 2039 * @param pids The pids of the processes whose memory usage is to be 2040 * retrieved. 2041 * @return Returns an array of memory information, one for each 2042 * requested pid. 2043 */ 2044 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 2045 try { 2046 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 2047 } catch (RemoteException e) { 2048 return null; 2049 } 2050 } 2051 2052 /** 2053 * @deprecated This is now just a wrapper for 2054 * {@link #killBackgroundProcesses(String)}; the previous behavior here 2055 * is no longer available to applications because it allows them to 2056 * break other applications by removing their alarms, stopping their 2057 * services, etc. 2058 */ 2059 @Deprecated 2060 public void restartPackage(String packageName) { 2061 killBackgroundProcesses(packageName); 2062 } 2063 2064 /** 2065 * Have the system immediately kill all background processes associated 2066 * with the given package. This is the same as the kernel killing those 2067 * processes to reclaim memory; the system will take care of restarting 2068 * these processes in the future as needed. 2069 * 2070 * <p>You must hold the permission 2071 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 2072 * call this method. 2073 * 2074 * @param packageName The name of the package whose processes are to 2075 * be killed. 2076 */ 2077 public void killBackgroundProcesses(String packageName) { 2078 try { 2079 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 2080 UserHandle.myUserId()); 2081 } catch (RemoteException e) { 2082 } 2083 } 2084 2085 /** 2086 * Have the system perform a force stop of everything associated with 2087 * the given application package. All processes that share its uid 2088 * will be killed, all services it has running stopped, all activities 2089 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 2090 * broadcast will be sent, so that any of its registered alarms can 2091 * be stopped, notifications removed, etc. 2092 * 2093 * <p>You must hold the permission 2094 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 2095 * call this method. 2096 * 2097 * @param packageName The name of the package to be stopped. 2098 * 2099 * @hide This is not available to third party applications due to 2100 * it allowing them to break other applications by stopping their 2101 * services, removing their alarms, etc. 2102 */ 2103 public void forceStopPackage(String packageName) { 2104 try { 2105 ActivityManagerNative.getDefault().forceStopPackage(packageName, 2106 UserHandle.myUserId()); 2107 } catch (RemoteException e) { 2108 } 2109 } 2110 2111 /** 2112 * Get the device configuration attributes. 2113 */ 2114 public ConfigurationInfo getDeviceConfigurationInfo() { 2115 try { 2116 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 2117 } catch (RemoteException e) { 2118 } 2119 return null; 2120 } 2121 2122 /** 2123 * Get the preferred density of icons for the launcher. This is used when 2124 * custom drawables are created (e.g., for shortcuts). 2125 * 2126 * @return density in terms of DPI 2127 */ 2128 public int getLauncherLargeIconDensity() { 2129 final Resources res = mContext.getResources(); 2130 final int density = res.getDisplayMetrics().densityDpi; 2131 final int sw = res.getConfiguration().smallestScreenWidthDp; 2132 2133 if (sw < 600) { 2134 // Smaller than approx 7" tablets, use the regular icon size. 2135 return density; 2136 } 2137 2138 switch (density) { 2139 case DisplayMetrics.DENSITY_LOW: 2140 return DisplayMetrics.DENSITY_MEDIUM; 2141 case DisplayMetrics.DENSITY_MEDIUM: 2142 return DisplayMetrics.DENSITY_HIGH; 2143 case DisplayMetrics.DENSITY_TV: 2144 return DisplayMetrics.DENSITY_XHIGH; 2145 case DisplayMetrics.DENSITY_HIGH: 2146 return DisplayMetrics.DENSITY_XHIGH; 2147 case DisplayMetrics.DENSITY_XHIGH: 2148 return DisplayMetrics.DENSITY_XXHIGH; 2149 case DisplayMetrics.DENSITY_XXHIGH: 2150 return DisplayMetrics.DENSITY_XHIGH * 2; 2151 default: 2152 // The density is some abnormal value. Return some other 2153 // abnormal value that is a reasonable scaling of it. 2154 return (int)((density*1.5f)+.5f); 2155 } 2156 } 2157 2158 /** 2159 * Get the preferred launcher icon size. This is used when custom drawables 2160 * are created (e.g., for shortcuts). 2161 * 2162 * @return dimensions of square icons in terms of pixels 2163 */ 2164 public int getLauncherLargeIconSize() { 2165 return getLauncherLargeIconSizeInner(mContext); 2166 } 2167 2168 static int getLauncherLargeIconSizeInner(Context context) { 2169 final Resources res = context.getResources(); 2170 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 2171 final int sw = res.getConfiguration().smallestScreenWidthDp; 2172 2173 if (sw < 600) { 2174 // Smaller than approx 7" tablets, use the regular icon size. 2175 return size; 2176 } 2177 2178 final int density = res.getDisplayMetrics().densityDpi; 2179 2180 switch (density) { 2181 case DisplayMetrics.DENSITY_LOW: 2182 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2183 case DisplayMetrics.DENSITY_MEDIUM: 2184 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2185 case DisplayMetrics.DENSITY_TV: 2186 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2187 case DisplayMetrics.DENSITY_HIGH: 2188 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2189 case DisplayMetrics.DENSITY_XHIGH: 2190 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2191 case DisplayMetrics.DENSITY_XXHIGH: 2192 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2193 default: 2194 // The density is some abnormal value. Return some other 2195 // abnormal value that is a reasonable scaling of it. 2196 return (int)((size*1.5f) + .5f); 2197 } 2198 } 2199 2200 /** 2201 * Returns "true" if the user interface is currently being messed with 2202 * by a monkey. 2203 */ 2204 public static boolean isUserAMonkey() { 2205 try { 2206 return ActivityManagerNative.getDefault().isUserAMonkey(); 2207 } catch (RemoteException e) { 2208 } 2209 return false; 2210 } 2211 2212 /** 2213 * Returns "true" if device is running in a test harness. 2214 */ 2215 public static boolean isRunningInTestHarness() { 2216 return SystemProperties.getBoolean("ro.test_harness", false); 2217 } 2218 2219 /** 2220 * Returns the launch count of each installed package. 2221 * 2222 * @hide 2223 */ 2224 public Map<String, Integer> getAllPackageLaunchCounts() { 2225 try { 2226 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2227 ServiceManager.getService("usagestats")); 2228 if (usageStatsService == null) { 2229 return new HashMap<String, Integer>(); 2230 } 2231 2232 UsageStats.PackageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats( 2233 ActivityThread.currentPackageName()); 2234 if (allPkgUsageStats == null) { 2235 return new HashMap<String, Integer>(); 2236 } 2237 2238 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2239 for (UsageStats.PackageStats pkgUsageStats : allPkgUsageStats) { 2240 launchCounts.put(pkgUsageStats.getPackageName(), pkgUsageStats.getLaunchCount()); 2241 } 2242 2243 return launchCounts; 2244 } catch (RemoteException e) { 2245 Log.w(TAG, "Could not query launch counts", e); 2246 return new HashMap<String, Integer>(); 2247 } 2248 } 2249 2250 /** @hide */ 2251 public static int checkComponentPermission(String permission, int uid, 2252 int owningUid, boolean exported) { 2253 // Root, system server get to do everything. 2254 if (uid == 0 || uid == Process.SYSTEM_UID) { 2255 return PackageManager.PERMISSION_GRANTED; 2256 } 2257 // Isolated processes don't get any permissions. 2258 if (UserHandle.isIsolated(uid)) { 2259 return PackageManager.PERMISSION_DENIED; 2260 } 2261 // If there is a uid that owns whatever is being accessed, it has 2262 // blanket access to it regardless of the permissions it requires. 2263 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2264 return PackageManager.PERMISSION_GRANTED; 2265 } 2266 // If the target is not exported, then nobody else can get to it. 2267 if (!exported) { 2268 /* 2269 RuntimeException here = new RuntimeException("here"); 2270 here.fillInStackTrace(); 2271 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2272 here); 2273 */ 2274 return PackageManager.PERMISSION_DENIED; 2275 } 2276 if (permission == null) { 2277 return PackageManager.PERMISSION_GRANTED; 2278 } 2279 try { 2280 return AppGlobals.getPackageManager() 2281 .checkUidPermission(permission, uid); 2282 } catch (RemoteException e) { 2283 // Should never happen, but if it does... deny! 2284 Slog.e(TAG, "PackageManager is dead?!?", e); 2285 } 2286 return PackageManager.PERMISSION_DENIED; 2287 } 2288 2289 /** @hide */ 2290 public static int checkUidPermission(String permission, int uid) { 2291 try { 2292 return AppGlobals.getPackageManager() 2293 .checkUidPermission(permission, uid); 2294 } catch (RemoteException e) { 2295 // Should never happen, but if it does... deny! 2296 Slog.e(TAG, "PackageManager is dead?!?", e); 2297 } 2298 return PackageManager.PERMISSION_DENIED; 2299 } 2300 2301 /** 2302 * @hide 2303 * Helper for dealing with incoming user arguments to system service calls. 2304 * Takes care of checking permissions and converting USER_CURRENT to the 2305 * actual current user. 2306 * 2307 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2308 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2309 * @param userId The user id argument supplied by the caller -- this is the user 2310 * they want to run as. 2311 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2312 * to get a USER_ALL returned and deal with it correctly. If false, 2313 * an exception will be thrown if USER_ALL is supplied. 2314 * @param requireFull If true, the caller must hold 2315 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2316 * different user than their current process; otherwise they must hold 2317 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2318 * @param name Optional textual name of the incoming call; only for generating error messages. 2319 * @param callerPackage Optional package name of caller; only for error messages. 2320 * 2321 * @return Returns the user ID that the call should run as. Will always be a concrete 2322 * user number, unless <var>allowAll</var> is true in which case it could also be 2323 * USER_ALL. 2324 */ 2325 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2326 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2327 if (UserHandle.getUserId(callingUid) == userId) { 2328 return userId; 2329 } 2330 try { 2331 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2332 callingUid, userId, allowAll, requireFull, name, callerPackage); 2333 } catch (RemoteException e) { 2334 throw new SecurityException("Failed calling activity manager", e); 2335 } 2336 } 2337 2338 /** @hide */ 2339 public static int getCurrentUser() { 2340 UserInfo ui; 2341 try { 2342 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2343 return ui != null ? ui.id : 0; 2344 } catch (RemoteException e) { 2345 return 0; 2346 } 2347 } 2348 2349 /** 2350 * Returns the usage statistics of each installed package. 2351 * 2352 * @hide 2353 */ 2354 public UsageStats.PackageStats[] getAllPackageUsageStats() { 2355 try { 2356 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2357 ServiceManager.getService("usagestats")); 2358 if (usageStatsService != null) { 2359 return usageStatsService.getAllPkgUsageStats(ActivityThread.currentPackageName()); 2360 } 2361 } catch (RemoteException e) { 2362 Log.w(TAG, "Could not query usage stats", e); 2363 } 2364 return new UsageStats.PackageStats[0]; 2365 } 2366 2367 /** 2368 * @param userid the user's id. Zero indicates the default user 2369 * @hide 2370 */ 2371 public boolean switchUser(int userid) { 2372 try { 2373 return ActivityManagerNative.getDefault().switchUser(userid); 2374 } catch (RemoteException e) { 2375 return false; 2376 } 2377 } 2378 2379 /** 2380 * Return whether the given user is actively running. This means that 2381 * the user is in the "started" state, not "stopped" -- it is currently 2382 * allowed to run code through scheduled alarms, receiving broadcasts, 2383 * etc. A started user may be either the current foreground user or a 2384 * background user; the result here does not distinguish between the two. 2385 * @param userid the user's id. Zero indicates the default user. 2386 * @hide 2387 */ 2388 public boolean isUserRunning(int userid) { 2389 try { 2390 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2391 } catch (RemoteException e) { 2392 return false; 2393 } 2394 } 2395 2396 /** 2397 * Perform a system dump of various state associated with the given application 2398 * package name. This call blocks while the dump is being performed, so should 2399 * not be done on a UI thread. The data will be written to the given file 2400 * descriptor as text. An application must hold the 2401 * {@link android.Manifest.permission#DUMP} permission to make this call. 2402 * @param fd The file descriptor that the dump should be written to. The file 2403 * descriptor is <em>not</em> closed by this function; the caller continues to 2404 * own it. 2405 * @param packageName The name of the package that is to be dumped. 2406 */ 2407 public void dumpPackageState(FileDescriptor fd, String packageName) { 2408 dumpPackageStateStatic(fd, packageName); 2409 } 2410 2411 /** 2412 * @hide 2413 */ 2414 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2415 FileOutputStream fout = new FileOutputStream(fd); 2416 PrintWriter pw = new FastPrintWriter(fout); 2417 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2418 "-a", "package", packageName }); 2419 pw.println(); 2420 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2421 pw.println(); 2422 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2423 pw.println(); 2424 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2425 pw.println(); 2426 dumpService(pw, fd, "package", new String[] { packageName }); 2427 pw.println(); 2428 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2429 pw.flush(); 2430 } 2431 2432 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2433 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2434 IBinder service = ServiceManager.checkService(name); 2435 if (service == null) { 2436 pw.println(" (Service not found)"); 2437 return; 2438 } 2439 TransferPipe tp = null; 2440 try { 2441 pw.flush(); 2442 tp = new TransferPipe(); 2443 tp.setBufferPrefix(" "); 2444 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2445 tp.go(fd); 2446 } catch (Throwable e) { 2447 if (tp != null) { 2448 tp.kill(); 2449 } 2450 pw.println("Failure dumping service:"); 2451 e.printStackTrace(pw); 2452 } 2453 } 2454 2455 /** 2456 * @hide 2457 */ 2458 public void startLockTaskMode(int taskId) { 2459 try { 2460 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2461 } catch (RemoteException e) { 2462 } 2463 } 2464 2465 /** 2466 * @hide 2467 */ 2468 public void stopLockTaskMode() { 2469 try { 2470 ActivityManagerNative.getDefault().stopLockTaskMode(); 2471 } catch (RemoteException e) { 2472 } 2473 } 2474 2475 /** 2476 * @hide 2477 */ 2478 public boolean isInLockTaskMode() { 2479 try { 2480 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2481 } catch (RemoteException e) { 2482 return false; 2483 } 2484 } 2485 2486 /** 2487 * The AppTask allows you to manage your own application's tasks. 2488 * See {@link android.app.ActivityManager#getAppTasks()} 2489 */ 2490 public static class AppTask { 2491 private IAppTask mAppTaskImpl; 2492 2493 /** @hide */ 2494 public AppTask(IAppTask task) { 2495 mAppTaskImpl = task; 2496 } 2497 2498 /** 2499 * Finishes all activities in this task and removes it from the recent tasks list. 2500 */ 2501 public void finishAndRemoveTask() { 2502 try { 2503 mAppTaskImpl.finishAndRemoveTask(); 2504 } catch (RemoteException e) { 2505 Slog.e(TAG, "Invalid AppTask", e); 2506 } 2507 } 2508 2509 /** 2510 * Get the RecentTaskInfo associated with this task. 2511 * 2512 * @return The RecentTaskInfo for this task, or null if the task no longer exists. 2513 */ 2514 public RecentTaskInfo getTaskInfo() { 2515 try { 2516 return mAppTaskImpl.getTaskInfo(); 2517 } catch (RemoteException e) { 2518 Slog.e(TAG, "Invalid AppTask", e); 2519 return null; 2520 } 2521 } 2522 } 2523} 2524