ActivityManager.java revision bcbab3684349353ee8cab30b556001824d0e7ccf
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.content.ComponentName; 20import android.content.Context; 21import android.content.Intent; 22import android.content.pm.ApplicationInfo; 23import android.content.pm.ConfigurationInfo; 24import android.content.pm.IPackageDataObserver; 25import android.content.res.Configuration; 26import android.content.res.Resources; 27import android.graphics.Bitmap; 28import android.os.Debug; 29import android.os.RemoteException; 30import android.os.Handler; 31import android.os.Parcel; 32import android.os.Parcelable; 33import android.os.ServiceManager; 34import android.os.SystemProperties; 35import android.text.TextUtils; 36import android.util.DisplayMetrics; 37import android.util.Log; 38import com.android.internal.app.IUsageStats; 39import com.android.internal.os.PkgUsageStats; 40 41import java.util.ArrayList; 42import java.util.HashMap; 43import java.util.List; 44import java.util.Map; 45 46/** 47 * Interact with the overall activities running in the system. 48 */ 49public class ActivityManager { 50 private static String TAG = "ActivityManager"; 51 private static boolean localLOGV = false; 52 53 private final Context mContext; 54 private final Handler mHandler; 55 56 /*package*/ ActivityManager(Context context, Handler handler) { 57 mContext = context; 58 mHandler = handler; 59 } 60 61 /** 62 * Return the approximate per-application memory class of the current 63 * device. This gives you an idea of how hard a memory limit you should 64 * impose on your application to let the overall system work best. The 65 * returned value is in megabytes; the baseline Android memory class is 66 * 16 (which happens to be the Java heap limit of those devices); some 67 * device with more memory may return 24 or even higher numbers. 68 */ 69 public int getMemoryClass() { 70 return staticGetMemoryClass(); 71 } 72 73 /** @hide */ 74 static public int staticGetMemoryClass() { 75 // Really brain dead right now -- just take this from the configured 76 // vm heap size, and assume it is in megabytes and thus ends with "m". 77 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 78 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 79 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 80 } 81 return staticGetLargeMemoryClass(); 82 } 83 84 /** 85 * Return the approximate per-application memory class of the current 86 * device when an application is running with a large heap. This is the 87 * space available for memory-intensive applications; most applications 88 * should not need this amount of memory, and should instead stay with the 89 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 90 * This may be the same size as {@link #getMemoryClass()} on memory 91 * constrained devices, or it may be significantly larger on devices with 92 * a large amount of available RAM. 93 * 94 * <p>The is the size of the application's Dalvik heap if it has 95 * specified <code>android:largeHeap="true"</code> in its manifest. 96 */ 97 public int getLargeMemoryClass() { 98 return staticGetLargeMemoryClass(); 99 } 100 101 /** @hide */ 102 static public int staticGetLargeMemoryClass() { 103 // Really brain dead right now -- just take this from the configured 104 // vm heap size, and assume it is in megabytes and thus ends with "m". 105 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 106 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 107 } 108 109 /** 110 * Information you can retrieve about tasks that the user has most recently 111 * started or visited. 112 */ 113 public static class RecentTaskInfo implements Parcelable { 114 /** 115 * If this task is currently running, this is the identifier for it. 116 * If it is not running, this will be -1. 117 */ 118 public int id; 119 120 /** 121 * The true identifier of this task, valid even if it is not running. 122 */ 123 public int persistentId; 124 125 /** 126 * The original Intent used to launch the task. You can use this 127 * Intent to re-launch the task (if it is no longer running) or bring 128 * the current task to the front. 129 */ 130 public Intent baseIntent; 131 132 /** 133 * If this task was started from an alias, this is the actual 134 * activity component that was initially started; the component of 135 * the baseIntent in this case is the name of the actual activity 136 * implementation that the alias referred to. Otherwise, this is null. 137 */ 138 public ComponentName origActivity; 139 140 /** 141 * Description of the task's last state. 142 */ 143 public CharSequence description; 144 145 public RecentTaskInfo() { 146 } 147 148 public int describeContents() { 149 return 0; 150 } 151 152 public void writeToParcel(Parcel dest, int flags) { 153 dest.writeInt(id); 154 dest.writeInt(persistentId); 155 if (baseIntent != null) { 156 dest.writeInt(1); 157 baseIntent.writeToParcel(dest, 0); 158 } else { 159 dest.writeInt(0); 160 } 161 ComponentName.writeToParcel(origActivity, dest); 162 TextUtils.writeToParcel(description, dest, 163 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 164 } 165 166 public void readFromParcel(Parcel source) { 167 id = source.readInt(); 168 persistentId = source.readInt(); 169 if (source.readInt() != 0) { 170 baseIntent = Intent.CREATOR.createFromParcel(source); 171 } else { 172 baseIntent = null; 173 } 174 origActivity = ComponentName.readFromParcel(source); 175 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 176 } 177 178 public static final Creator<RecentTaskInfo> CREATOR 179 = new Creator<RecentTaskInfo>() { 180 public RecentTaskInfo createFromParcel(Parcel source) { 181 return new RecentTaskInfo(source); 182 } 183 public RecentTaskInfo[] newArray(int size) { 184 return new RecentTaskInfo[size]; 185 } 186 }; 187 188 private RecentTaskInfo(Parcel source) { 189 readFromParcel(source); 190 } 191 } 192 193 /** 194 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 195 * that have set their 196 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 197 */ 198 public static final int RECENT_WITH_EXCLUDED = 0x0001; 199 200 /** 201 * Provides a list that does not contain any 202 * recent tasks that currently are not available to the user. 203 */ 204 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 205 206 /** 207 * Flag for use with {@link #getRecentTasks}: also return the thumbnail 208 * bitmap (if available) for each recent task. 209 * @hide 210 */ 211 public static final int TASKS_GET_THUMBNAILS = 0x0001000; 212 213 /** 214 * Return a list of the tasks that the user has recently launched, with 215 * the most recent being first and older ones after in order. 216 * 217 * @param maxNum The maximum number of entries to return in the list. The 218 * actual number returned may be smaller, depending on how many tasks the 219 * user has started and the maximum number the system can remember. 220 * @param flags Information about what to return. May be any combination 221 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 222 * 223 * @return Returns a list of RecentTaskInfo records describing each of 224 * the recent tasks. 225 * 226 * @throws SecurityException Throws SecurityException if the caller does 227 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 228 */ 229 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 230 throws SecurityException { 231 try { 232 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 233 flags); 234 } catch (RemoteException e) { 235 // System dead, we will be dead too soon! 236 return null; 237 } 238 } 239 240 /** 241 * Information you can retrieve about a particular task that is currently 242 * "running" in the system. Note that a running task does not mean the 243 * given task actual has a process it is actively running in; it simply 244 * means that the user has gone to it and never closed it, but currently 245 * the system may have killed its process and is only holding on to its 246 * last state in order to restart it when the user returns. 247 */ 248 public static class RunningTaskInfo implements Parcelable { 249 /** 250 * A unique identifier for this task. 251 */ 252 public int id; 253 254 /** 255 * The component launched as the first activity in the task. This can 256 * be considered the "application" of this task. 257 */ 258 public ComponentName baseActivity; 259 260 /** 261 * The activity component at the top of the history stack of the task. 262 * This is what the user is currently doing. 263 */ 264 public ComponentName topActivity; 265 266 /** 267 * Thumbnail representation of the task's current state. Currently 268 * always null. 269 */ 270 public Bitmap thumbnail; 271 272 /** 273 * Description of the task's current state. 274 */ 275 public CharSequence description; 276 277 /** 278 * Number of activities in this task. 279 */ 280 public int numActivities; 281 282 /** 283 * Number of activities that are currently running (not stopped 284 * and persisted) in this task. 285 */ 286 public int numRunning; 287 288 public RunningTaskInfo() { 289 } 290 291 public int describeContents() { 292 return 0; 293 } 294 295 public void writeToParcel(Parcel dest, int flags) { 296 dest.writeInt(id); 297 ComponentName.writeToParcel(baseActivity, dest); 298 ComponentName.writeToParcel(topActivity, dest); 299 if (thumbnail != null) { 300 dest.writeInt(1); 301 thumbnail.writeToParcel(dest, 0); 302 } else { 303 dest.writeInt(0); 304 } 305 TextUtils.writeToParcel(description, dest, 306 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 307 dest.writeInt(numActivities); 308 dest.writeInt(numRunning); 309 } 310 311 public void readFromParcel(Parcel source) { 312 id = source.readInt(); 313 baseActivity = ComponentName.readFromParcel(source); 314 topActivity = ComponentName.readFromParcel(source); 315 if (source.readInt() != 0) { 316 thumbnail = Bitmap.CREATOR.createFromParcel(source); 317 } else { 318 thumbnail = null; 319 } 320 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 321 numActivities = source.readInt(); 322 numRunning = source.readInt(); 323 } 324 325 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 326 public RunningTaskInfo createFromParcel(Parcel source) { 327 return new RunningTaskInfo(source); 328 } 329 public RunningTaskInfo[] newArray(int size) { 330 return new RunningTaskInfo[size]; 331 } 332 }; 333 334 private RunningTaskInfo(Parcel source) { 335 readFromParcel(source); 336 } 337 } 338 339 /** 340 * Return a list of the tasks that are currently running, with 341 * the most recent being first and older ones after in order. Note that 342 * "running" does not mean any of the task's code is currently loaded or 343 * activity -- the task may have been frozen by the system, so that it 344 * can be restarted in its previous state when next brought to the 345 * foreground. 346 * 347 * @param maxNum The maximum number of entries to return in the list. The 348 * actual number returned may be smaller, depending on how many tasks the 349 * user has started. 350 * 351 * @param flags Optional flags 352 * @param receiver Optional receiver for delayed thumbnails 353 * 354 * @return Returns a list of RunningTaskInfo records describing each of 355 * the running tasks. 356 * 357 * Some thumbnails may not be available at the time of this call. The optional 358 * receiver may be used to receive those thumbnails. 359 * 360 * @throws SecurityException Throws SecurityException if the caller does 361 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 362 * 363 * @hide 364 */ 365 public List<RunningTaskInfo> getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver) 366 throws SecurityException { 367 try { 368 return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver); 369 } catch (RemoteException e) { 370 // System dead, we will be dead too soon! 371 return null; 372 } 373 } 374 375 /** 376 * Return a list of the tasks that are currently running, with 377 * the most recent being first and older ones after in order. Note that 378 * "running" does not mean any of the task's code is currently loaded or 379 * activity -- the task may have been frozen by the system, so that it 380 * can be restarted in its previous state when next brought to the 381 * foreground. 382 * 383 * @param maxNum The maximum number of entries to return in the list. The 384 * actual number returned may be smaller, depending on how many tasks the 385 * user has started. 386 * 387 * @return Returns a list of RunningTaskInfo records describing each of 388 * the running tasks. 389 * 390 * @throws SecurityException Throws SecurityException if the caller does 391 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 392 */ 393 public List<RunningTaskInfo> getRunningTasks(int maxNum) 394 throws SecurityException { 395 return getRunningTasks(maxNum, 0, null); 396 } 397 398 /** @hide */ 399 public static class TaskThumbnails implements Parcelable { 400 public Bitmap mainThumbnail; 401 402 public int numSubThumbbails; 403 404 /** @hide */ 405 public IThumbnailRetriever retriever; 406 407 /** @hide Magic for ActivityManagerService. Not marshalled */ 408 public ArrayList<Bitmap> otherThumbnails; 409 410 public TaskThumbnails() { 411 } 412 413 public Bitmap getSubThumbnail(int index) { 414 try { 415 return retriever.getThumbnail(index); 416 } catch (RemoteException e) { 417 return null; 418 } 419 } 420 421 public int describeContents() { 422 return 0; 423 } 424 425 public void writeToParcel(Parcel dest, int flags) { 426 if (mainThumbnail != null) { 427 dest.writeInt(1); 428 mainThumbnail.writeToParcel(dest, 0); 429 } else { 430 dest.writeInt(0); 431 } 432 dest.writeInt(numSubThumbbails); 433 dest.writeStrongInterface(retriever); 434 } 435 436 public void readFromParcel(Parcel source) { 437 if (source.readInt() != 0) { 438 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 439 } else { 440 mainThumbnail = null; 441 } 442 numSubThumbbails = source.readInt(); 443 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 444 } 445 446 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 447 public TaskThumbnails createFromParcel(Parcel source) { 448 return new TaskThumbnails(source); 449 } 450 public TaskThumbnails[] newArray(int size) { 451 return new TaskThumbnails[size]; 452 } 453 }; 454 455 private TaskThumbnails(Parcel source) { 456 readFromParcel(source); 457 } 458 } 459 460 /** @hide */ 461 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 462 try { 463 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 464 } catch (RemoteException e) { 465 // System dead, we will be dead too soon! 466 return null; 467 } 468 } 469 470 /** 471 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 472 * activity along with the task, so it is positioned immediately behind 473 * the task. 474 */ 475 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 476 477 /** 478 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 479 * user-instigated action, so the current activity will not receive a 480 * hint that the user is leaving. 481 */ 482 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 483 484 /** 485 * Ask that the task associated with a given task ID be moved to the 486 * front of the stack, so it is now visible to the user. Requires that 487 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 488 * or a SecurityException will be thrown. 489 * 490 * @param taskId The identifier of the task to be moved, as found in 491 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 492 * @param flags Additional operational flags, 0 or more of 493 * {@link #MOVE_TASK_WITH_HOME}. 494 */ 495 public void moveTaskToFront(int taskId, int flags) { 496 try { 497 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags); 498 } catch (RemoteException e) { 499 // System dead, we will be dead too soon! 500 } 501 } 502 503 /** 504 * Information you can retrieve about a particular Service that is 505 * currently running in the system. 506 */ 507 public static class RunningServiceInfo implements Parcelable { 508 /** 509 * The service component. 510 */ 511 public ComponentName service; 512 513 /** 514 * If non-zero, this is the process the service is running in. 515 */ 516 public int pid; 517 518 /** 519 * The UID that owns this service. 520 */ 521 public int uid; 522 523 /** 524 * The name of the process this service runs in. 525 */ 526 public String process; 527 528 /** 529 * Set to true if the service has asked to run as a foreground process. 530 */ 531 public boolean foreground; 532 533 /** 534 * The time when the service was first made active, either by someone 535 * starting or binding to it. This 536 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 537 */ 538 public long activeSince; 539 540 /** 541 * Set to true if this service has been explicitly started. 542 */ 543 public boolean started; 544 545 /** 546 * Number of clients connected to the service. 547 */ 548 public int clientCount; 549 550 /** 551 * Number of times the service's process has crashed while the service 552 * is running. 553 */ 554 public int crashCount; 555 556 /** 557 * The time when there was last activity in the service (either 558 * explicit requests to start it or clients binding to it). This 559 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 560 */ 561 public long lastActivityTime; 562 563 /** 564 * If non-zero, this service is not currently running, but scheduled to 565 * restart at the given time. 566 */ 567 public long restarting; 568 569 /** 570 * Bit for {@link #flags}: set if this service has been 571 * explicitly started. 572 */ 573 public static final int FLAG_STARTED = 1<<0; 574 575 /** 576 * Bit for {@link #flags}: set if the service has asked to 577 * run as a foreground process. 578 */ 579 public static final int FLAG_FOREGROUND = 1<<1; 580 581 /** 582 * Bit for {@link #flags): set if the service is running in a 583 * core system process. 584 */ 585 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 586 587 /** 588 * Bit for {@link #flags): set if the service is running in a 589 * persistent process. 590 */ 591 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 592 593 /** 594 * Running flags. 595 */ 596 public int flags; 597 598 /** 599 * For special services that are bound to by system code, this is 600 * the package that holds the binding. 601 */ 602 public String clientPackage; 603 604 /** 605 * For special services that are bound to by system code, this is 606 * a string resource providing a user-visible label for who the 607 * client is. 608 */ 609 public int clientLabel; 610 611 public RunningServiceInfo() { 612 } 613 614 public int describeContents() { 615 return 0; 616 } 617 618 public void writeToParcel(Parcel dest, int flags) { 619 ComponentName.writeToParcel(service, dest); 620 dest.writeInt(pid); 621 dest.writeInt(uid); 622 dest.writeString(process); 623 dest.writeInt(foreground ? 1 : 0); 624 dest.writeLong(activeSince); 625 dest.writeInt(started ? 1 : 0); 626 dest.writeInt(clientCount); 627 dest.writeInt(crashCount); 628 dest.writeLong(lastActivityTime); 629 dest.writeLong(restarting); 630 dest.writeInt(this.flags); 631 dest.writeString(clientPackage); 632 dest.writeInt(clientLabel); 633 } 634 635 public void readFromParcel(Parcel source) { 636 service = ComponentName.readFromParcel(source); 637 pid = source.readInt(); 638 uid = source.readInt(); 639 process = source.readString(); 640 foreground = source.readInt() != 0; 641 activeSince = source.readLong(); 642 started = source.readInt() != 0; 643 clientCount = source.readInt(); 644 crashCount = source.readInt(); 645 lastActivityTime = source.readLong(); 646 restarting = source.readLong(); 647 flags = source.readInt(); 648 clientPackage = source.readString(); 649 clientLabel = source.readInt(); 650 } 651 652 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 653 public RunningServiceInfo createFromParcel(Parcel source) { 654 return new RunningServiceInfo(source); 655 } 656 public RunningServiceInfo[] newArray(int size) { 657 return new RunningServiceInfo[size]; 658 } 659 }; 660 661 private RunningServiceInfo(Parcel source) { 662 readFromParcel(source); 663 } 664 } 665 666 /** 667 * Return a list of the services that are currently running. 668 * 669 * @param maxNum The maximum number of entries to return in the list. The 670 * actual number returned may be smaller, depending on how many services 671 * are running. 672 * 673 * @return Returns a list of RunningServiceInfo records describing each of 674 * the running tasks. 675 */ 676 public List<RunningServiceInfo> getRunningServices(int maxNum) 677 throws SecurityException { 678 try { 679 return (List<RunningServiceInfo>)ActivityManagerNative.getDefault() 680 .getServices(maxNum, 0); 681 } catch (RemoteException e) { 682 // System dead, we will be dead too soon! 683 return null; 684 } 685 } 686 687 /** 688 * Returns a PendingIntent you can start to show a control panel for the 689 * given running service. If the service does not have a control panel, 690 * null is returned. 691 */ 692 public PendingIntent getRunningServiceControlPanel(ComponentName service) 693 throws SecurityException { 694 try { 695 return ActivityManagerNative.getDefault() 696 .getRunningServiceControlPanel(service); 697 } catch (RemoteException e) { 698 // System dead, we will be dead too soon! 699 return null; 700 } 701 } 702 703 /** 704 * Information you can retrieve about the available memory through 705 * {@link ActivityManager#getMemoryInfo}. 706 */ 707 public static class MemoryInfo implements Parcelable { 708 /** 709 * The total available memory on the system. This number should not 710 * be considered absolute: due to the nature of the kernel, a significant 711 * portion of this memory is actually in use and needed for the overall 712 * system to run well. 713 */ 714 public long availMem; 715 716 /** 717 * The threshold of {@link #availMem} at which we consider memory to be 718 * low and start killing background services and other non-extraneous 719 * processes. 720 */ 721 public long threshold; 722 723 /** 724 * Set to true if the system considers itself to currently be in a low 725 * memory situation. 726 */ 727 public boolean lowMemory; 728 729 public MemoryInfo() { 730 } 731 732 public int describeContents() { 733 return 0; 734 } 735 736 public void writeToParcel(Parcel dest, int flags) { 737 dest.writeLong(availMem); 738 dest.writeLong(threshold); 739 dest.writeInt(lowMemory ? 1 : 0); 740 } 741 742 public void readFromParcel(Parcel source) { 743 availMem = source.readLong(); 744 threshold = source.readLong(); 745 lowMemory = source.readInt() != 0; 746 } 747 748 public static final Creator<MemoryInfo> CREATOR 749 = new Creator<MemoryInfo>() { 750 public MemoryInfo createFromParcel(Parcel source) { 751 return new MemoryInfo(source); 752 } 753 public MemoryInfo[] newArray(int size) { 754 return new MemoryInfo[size]; 755 } 756 }; 757 758 private MemoryInfo(Parcel source) { 759 readFromParcel(source); 760 } 761 } 762 763 public void getMemoryInfo(MemoryInfo outInfo) { 764 try { 765 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 766 } catch (RemoteException e) { 767 } 768 } 769 770 /** 771 * @hide 772 */ 773 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 774 try { 775 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 776 observer); 777 } catch (RemoteException e) { 778 return false; 779 } 780 } 781 782 /** 783 * Information you can retrieve about any processes that are in an error condition. 784 */ 785 public static class ProcessErrorStateInfo implements Parcelable { 786 /** 787 * Condition codes 788 */ 789 public static final int NO_ERROR = 0; 790 public static final int CRASHED = 1; 791 public static final int NOT_RESPONDING = 2; 792 793 /** 794 * The condition that the process is in. 795 */ 796 public int condition; 797 798 /** 799 * The process name in which the crash or error occurred. 800 */ 801 public String processName; 802 803 /** 804 * The pid of this process; 0 if none 805 */ 806 public int pid; 807 808 /** 809 * The kernel user-ID that has been assigned to this process; 810 * currently this is not a unique ID (multiple applications can have 811 * the same uid). 812 */ 813 public int uid; 814 815 /** 816 * The activity name associated with the error, if known. May be null. 817 */ 818 public String tag; 819 820 /** 821 * A short message describing the error condition. 822 */ 823 public String shortMsg; 824 825 /** 826 * A long message describing the error condition. 827 */ 828 public String longMsg; 829 830 /** 831 * The stack trace where the error originated. May be null. 832 */ 833 public String stackTrace; 834 835 /** 836 * to be deprecated: This value will always be null. 837 */ 838 public byte[] crashData = null; 839 840 public ProcessErrorStateInfo() { 841 } 842 843 public int describeContents() { 844 return 0; 845 } 846 847 public void writeToParcel(Parcel dest, int flags) { 848 dest.writeInt(condition); 849 dest.writeString(processName); 850 dest.writeInt(pid); 851 dest.writeInt(uid); 852 dest.writeString(tag); 853 dest.writeString(shortMsg); 854 dest.writeString(longMsg); 855 dest.writeString(stackTrace); 856 } 857 858 public void readFromParcel(Parcel source) { 859 condition = source.readInt(); 860 processName = source.readString(); 861 pid = source.readInt(); 862 uid = source.readInt(); 863 tag = source.readString(); 864 shortMsg = source.readString(); 865 longMsg = source.readString(); 866 stackTrace = source.readString(); 867 } 868 869 public static final Creator<ProcessErrorStateInfo> CREATOR = 870 new Creator<ProcessErrorStateInfo>() { 871 public ProcessErrorStateInfo createFromParcel(Parcel source) { 872 return new ProcessErrorStateInfo(source); 873 } 874 public ProcessErrorStateInfo[] newArray(int size) { 875 return new ProcessErrorStateInfo[size]; 876 } 877 }; 878 879 private ProcessErrorStateInfo(Parcel source) { 880 readFromParcel(source); 881 } 882 } 883 884 /** 885 * Returns a list of any processes that are currently in an error condition. The result 886 * will be null if all processes are running properly at this time. 887 * 888 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 889 * current error conditions (it will not return an empty list). This list ordering is not 890 * specified. 891 */ 892 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 893 try { 894 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 895 } catch (RemoteException e) { 896 return null; 897 } 898 } 899 900 /** 901 * Information you can retrieve about a running process. 902 */ 903 public static class RunningAppProcessInfo implements Parcelable { 904 /** 905 * The name of the process that this object is associated with 906 */ 907 public String processName; 908 909 /** 910 * The pid of this process; 0 if none 911 */ 912 public int pid; 913 914 /** 915 * The user id of this process. 916 */ 917 public int uid; 918 919 /** 920 * All packages that have been loaded into the process. 921 */ 922 public String pkgList[]; 923 924 /** 925 * Constant for {@link #flags}: this is an app that is unable to 926 * correctly save its state when going to the background, 927 * so it can not be killed while in the background. 928 * @hide 929 */ 930 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 931 932 /** 933 * Constant for {@link #flags}: this process is associated with a 934 * persistent system app. 935 * @hide 936 */ 937 public static final int FLAG_PERSISTENT = 1<<1; 938 939 /** 940 * Flags of information. May be any of 941 * {@link #FLAG_CANT_SAVE_STATE}. 942 * @hide 943 */ 944 public int flags; 945 946 /** 947 * Constant for {@link #importance}: this process is running the 948 * foreground UI. 949 */ 950 public static final int IMPORTANCE_FOREGROUND = 100; 951 952 /** 953 * Constant for {@link #importance}: this process is running something 954 * that is actively visible to the user, though not in the immediate 955 * foreground. 956 */ 957 public static final int IMPORTANCE_VISIBLE = 200; 958 959 /** 960 * Constant for {@link #importance}: this process is running something 961 * that is considered to be actively perceptible to the user. An 962 * example would be an application performing background music playback. 963 */ 964 public static final int IMPORTANCE_PERCEPTIBLE = 130; 965 966 /** 967 * Constant for {@link #importance}: this process is running an 968 * application that can not save its state, and thus can't be killed 969 * while in the background. 970 * @hide 971 */ 972 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 973 974 /** 975 * Constant for {@link #importance}: this process is contains services 976 * that should remain running. 977 */ 978 public static final int IMPORTANCE_SERVICE = 300; 979 980 /** 981 * Constant for {@link #importance}: this process process contains 982 * background code that is expendable. 983 */ 984 public static final int IMPORTANCE_BACKGROUND = 400; 985 986 /** 987 * Constant for {@link #importance}: this process is empty of any 988 * actively running code. 989 */ 990 public static final int IMPORTANCE_EMPTY = 500; 991 992 /** 993 * The relative importance level that the system places on this 994 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 995 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 996 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 997 * constants are numbered so that "more important" values are always 998 * smaller than "less important" values. 999 */ 1000 public int importance; 1001 1002 /** 1003 * An additional ordering within a particular {@link #importance} 1004 * category, providing finer-grained information about the relative 1005 * utility of processes within a category. This number means nothing 1006 * except that a smaller values are more recently used (and thus 1007 * more important). Currently an LRU value is only maintained for 1008 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1009 * be maintained in the future. 1010 */ 1011 public int lru; 1012 1013 /** 1014 * Constant for {@link #importanceReasonCode}: nothing special has 1015 * been specified for the reason for this level. 1016 */ 1017 public static final int REASON_UNKNOWN = 0; 1018 1019 /** 1020 * Constant for {@link #importanceReasonCode}: one of the application's 1021 * content providers is being used by another process. The pid of 1022 * the client process is in {@link #importanceReasonPid} and the 1023 * target provider in this process is in 1024 * {@link #importanceReasonComponent}. 1025 */ 1026 public static final int REASON_PROVIDER_IN_USE = 1; 1027 1028 /** 1029 * Constant for {@link #importanceReasonCode}: one of the application's 1030 * content providers is being used by another process. The pid of 1031 * the client process is in {@link #importanceReasonPid} and the 1032 * target provider in this process is in 1033 * {@link #importanceReasonComponent}. 1034 */ 1035 public static final int REASON_SERVICE_IN_USE = 2; 1036 1037 /** 1038 * The reason for {@link #importance}, if any. 1039 */ 1040 public int importanceReasonCode; 1041 1042 /** 1043 * For the specified values of {@link #importanceReasonCode}, this 1044 * is the process ID of the other process that is a client of this 1045 * process. This will be 0 if no other process is using this one. 1046 */ 1047 public int importanceReasonPid; 1048 1049 /** 1050 * For the specified values of {@link #importanceReasonCode}, this 1051 * is the name of the component that is being used in this process. 1052 */ 1053 public ComponentName importanceReasonComponent; 1054 1055 public RunningAppProcessInfo() { 1056 importance = IMPORTANCE_FOREGROUND; 1057 importanceReasonCode = REASON_UNKNOWN; 1058 } 1059 1060 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1061 processName = pProcessName; 1062 pid = pPid; 1063 pkgList = pArr; 1064 } 1065 1066 public int describeContents() { 1067 return 0; 1068 } 1069 1070 public void writeToParcel(Parcel dest, int flags) { 1071 dest.writeString(processName); 1072 dest.writeInt(pid); 1073 dest.writeInt(uid); 1074 dest.writeStringArray(pkgList); 1075 dest.writeInt(this.flags); 1076 dest.writeInt(importance); 1077 dest.writeInt(lru); 1078 dest.writeInt(importanceReasonCode); 1079 dest.writeInt(importanceReasonPid); 1080 ComponentName.writeToParcel(importanceReasonComponent, dest); 1081 } 1082 1083 public void readFromParcel(Parcel source) { 1084 processName = source.readString(); 1085 pid = source.readInt(); 1086 uid = source.readInt(); 1087 pkgList = source.readStringArray(); 1088 flags = source.readInt(); 1089 importance = source.readInt(); 1090 lru = source.readInt(); 1091 importanceReasonCode = source.readInt(); 1092 importanceReasonPid = source.readInt(); 1093 importanceReasonComponent = ComponentName.readFromParcel(source); 1094 } 1095 1096 public static final Creator<RunningAppProcessInfo> CREATOR = 1097 new Creator<RunningAppProcessInfo>() { 1098 public RunningAppProcessInfo createFromParcel(Parcel source) { 1099 return new RunningAppProcessInfo(source); 1100 } 1101 public RunningAppProcessInfo[] newArray(int size) { 1102 return new RunningAppProcessInfo[size]; 1103 } 1104 }; 1105 1106 private RunningAppProcessInfo(Parcel source) { 1107 readFromParcel(source); 1108 } 1109 } 1110 1111 /** 1112 * Returns a list of application processes installed on external media 1113 * that are running on the device. 1114 * 1115 * @return Returns a list of ApplicationInfo records, or null if none 1116 * This list ordering is not specified. 1117 * @hide 1118 */ 1119 public List<ApplicationInfo> getRunningExternalApplications() { 1120 try { 1121 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1122 } catch (RemoteException e) { 1123 return null; 1124 } 1125 } 1126 1127 /** 1128 * Returns a list of application processes that are running on the device. 1129 * 1130 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1131 * running processes (it will not return an empty list). This list ordering is not 1132 * specified. 1133 */ 1134 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1135 try { 1136 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1137 } catch (RemoteException e) { 1138 return null; 1139 } 1140 } 1141 1142 /** 1143 * Return information about the memory usage of one or more processes. 1144 * 1145 * @param pids The pids of the processes whose memory usage is to be 1146 * retrieved. 1147 * @return Returns an array of memory information, one for each 1148 * requested pid. 1149 */ 1150 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1151 try { 1152 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1153 } catch (RemoteException e) { 1154 return null; 1155 } 1156 } 1157 1158 /** 1159 * @deprecated This is now just a wrapper for 1160 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1161 * is no longer available to applications because it allows them to 1162 * break other applications by removing their alarms, stopping their 1163 * services, etc. 1164 */ 1165 @Deprecated 1166 public void restartPackage(String packageName) { 1167 killBackgroundProcesses(packageName); 1168 } 1169 1170 /** 1171 * Have the system immediately kill all background processes associated 1172 * with the given package. This is the same as the kernel killing those 1173 * processes to reclaim memory; the system will take care of restarting 1174 * these processes in the future as needed. 1175 * 1176 * <p>You must hold the permission 1177 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1178 * call this method. 1179 * 1180 * @param packageName The name of the package whose processes are to 1181 * be killed. 1182 */ 1183 public void killBackgroundProcesses(String packageName) { 1184 try { 1185 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName); 1186 } catch (RemoteException e) { 1187 } 1188 } 1189 1190 /** 1191 * Have the system perform a force stop of everything associated with 1192 * the given application package. All processes that share its uid 1193 * will be killed, all services it has running stopped, all activities 1194 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1195 * broadcast will be sent, so that any of its registered alarms can 1196 * be stopped, notifications removed, etc. 1197 * 1198 * <p>You must hold the permission 1199 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1200 * call this method. 1201 * 1202 * @param packageName The name of the package to be stopped. 1203 * 1204 * @hide This is not available to third party applications due to 1205 * it allowing them to break other applications by stopping their 1206 * services, removing their alarms, etc. 1207 */ 1208 public void forceStopPackage(String packageName) { 1209 try { 1210 ActivityManagerNative.getDefault().forceStopPackage(packageName); 1211 } catch (RemoteException e) { 1212 } 1213 } 1214 1215 /** 1216 * Get the device configuration attributes. 1217 */ 1218 public ConfigurationInfo getDeviceConfigurationInfo() { 1219 try { 1220 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 1221 } catch (RemoteException e) { 1222 } 1223 return null; 1224 } 1225 1226 /** 1227 * Get the preferred density of icons for the launcher. This is used when 1228 * custom drawables are created (e.g., for shortcuts). 1229 * 1230 * @return density in terms of DPI 1231 */ 1232 public int getLauncherLargeIconDensity() { 1233 final Resources res = mContext.getResources(); 1234 final int density = res.getDisplayMetrics().densityDpi; 1235 1236 if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) 1237 != Configuration.SCREENLAYOUT_SIZE_XLARGE) { 1238 return density; 1239 } 1240 1241 switch (density) { 1242 case DisplayMetrics.DENSITY_LOW: 1243 return DisplayMetrics.DENSITY_MEDIUM; 1244 case DisplayMetrics.DENSITY_MEDIUM: 1245 return DisplayMetrics.DENSITY_HIGH; 1246 case DisplayMetrics.DENSITY_HIGH: 1247 return DisplayMetrics.DENSITY_XHIGH; 1248 case DisplayMetrics.DENSITY_XHIGH: 1249 return DisplayMetrics.DENSITY_MEDIUM * 2; 1250 default: 1251 return density; 1252 } 1253 } 1254 1255 /** 1256 * Get the preferred launcher icon size. This is used when custom drawables 1257 * are created (e.g., for shortcuts). 1258 * 1259 * @return dimensions of square icons in terms of pixels 1260 */ 1261 public int getLauncherLargeIconSize() { 1262 final Resources res = mContext.getResources(); 1263 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 1264 1265 if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) 1266 != Configuration.SCREENLAYOUT_SIZE_XLARGE) { 1267 return size; 1268 } 1269 1270 final int density = res.getDisplayMetrics().densityDpi; 1271 1272 switch (density) { 1273 case DisplayMetrics.DENSITY_LOW: 1274 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 1275 case DisplayMetrics.DENSITY_MEDIUM: 1276 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 1277 case DisplayMetrics.DENSITY_HIGH: 1278 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 1279 case DisplayMetrics.DENSITY_XHIGH: 1280 return (size * DisplayMetrics.DENSITY_MEDIUM * 2) / DisplayMetrics.DENSITY_XHIGH; 1281 default: 1282 return size; 1283 } 1284 } 1285 1286 /** 1287 * Returns "true" if the user interface is currently being messed with 1288 * by a monkey. 1289 */ 1290 public static boolean isUserAMonkey() { 1291 try { 1292 return ActivityManagerNative.getDefault().isUserAMonkey(); 1293 } catch (RemoteException e) { 1294 } 1295 return false; 1296 } 1297 1298 /** 1299 * Returns "true" if device is running in a test harness. 1300 */ 1301 public static boolean isRunningInTestHarness() { 1302 return SystemProperties.getBoolean("ro.test_harness", false); 1303 } 1304 1305 /** 1306 * Returns the launch count of each installed package. 1307 * 1308 * @hide 1309 */ 1310 public Map<String, Integer> getAllPackageLaunchCounts() { 1311 try { 1312 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 1313 ServiceManager.getService("usagestats")); 1314 if (usageStatsService == null) { 1315 return new HashMap<String, Integer>(); 1316 } 1317 1318 PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats(); 1319 if (allPkgUsageStats == null) { 1320 return new HashMap<String, Integer>(); 1321 } 1322 1323 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 1324 for (PkgUsageStats pkgUsageStats : allPkgUsageStats) { 1325 launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount); 1326 } 1327 1328 return launchCounts; 1329 } catch (RemoteException e) { 1330 Log.w(TAG, "Could not query launch counts", e); 1331 return new HashMap<String, Integer>(); 1332 } 1333 } 1334} 1335