ActivityManager.java revision 7ad33c8f9e7ecd356979dbad23c6c171b4f3339d
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.HashMap; 42import java.util.List; 43import java.util.Map; 44 45/** 46 * Interact with the overall activities running in the system. 47 */ 48public class ActivityManager { 49 private static String TAG = "ActivityManager"; 50 private static boolean DEBUG = false; 51 private static boolean localLOGV = DEBUG || android.util.Config.LOGV; 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 Bitmap getTaskThumbnail(int id) throws SecurityException { 400 try { 401 return ActivityManagerNative.getDefault().getTaskThumbnail(id); 402 } catch (RemoteException e) { 403 // System dead, we will be dead too soon! 404 return null; 405 } 406 } 407 408 /** 409 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 410 * activity along with the task, so it is positioned immediately behind 411 * the task. 412 */ 413 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 414 415 /** 416 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 417 * user-instigated action, so the current activity will not receive a 418 * hint that the user is leaving. 419 */ 420 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 421 422 /** 423 * Ask that the task associated with a given task ID be moved to the 424 * front of the stack, so it is now visible to the user. Requires that 425 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 426 * or a SecurityException will be thrown. 427 * 428 * @param taskId The identifier of the task to be moved, as found in 429 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 430 * @param flags Additional operational flags, 0 or more of 431 * {@link #MOVE_TASK_WITH_HOME}. 432 */ 433 public void moveTaskToFront(int taskId, int flags) { 434 try { 435 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags); 436 } catch (RemoteException e) { 437 // System dead, we will be dead too soon! 438 } 439 } 440 441 /** 442 * Information you can retrieve about a particular Service that is 443 * currently running in the system. 444 */ 445 public static class RunningServiceInfo implements Parcelable { 446 /** 447 * The service component. 448 */ 449 public ComponentName service; 450 451 /** 452 * If non-zero, this is the process the service is running in. 453 */ 454 public int pid; 455 456 /** 457 * The UID that owns this service. 458 */ 459 public int uid; 460 461 /** 462 * The name of the process this service runs in. 463 */ 464 public String process; 465 466 /** 467 * Set to true if the service has asked to run as a foreground process. 468 */ 469 public boolean foreground; 470 471 /** 472 * The time when the service was first made active, either by someone 473 * starting or binding to it. This 474 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 475 */ 476 public long activeSince; 477 478 /** 479 * Set to true if this service has been explicitly started. 480 */ 481 public boolean started; 482 483 /** 484 * Number of clients connected to the service. 485 */ 486 public int clientCount; 487 488 /** 489 * Number of times the service's process has crashed while the service 490 * is running. 491 */ 492 public int crashCount; 493 494 /** 495 * The time when there was last activity in the service (either 496 * explicit requests to start it or clients binding to it). This 497 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 498 */ 499 public long lastActivityTime; 500 501 /** 502 * If non-zero, this service is not currently running, but scheduled to 503 * restart at the given time. 504 */ 505 public long restarting; 506 507 /** 508 * Bit for {@link #flags}: set if this service has been 509 * explicitly started. 510 */ 511 public static final int FLAG_STARTED = 1<<0; 512 513 /** 514 * Bit for {@link #flags}: set if the service has asked to 515 * run as a foreground process. 516 */ 517 public static final int FLAG_FOREGROUND = 1<<1; 518 519 /** 520 * Bit for {@link #flags): set if the service is running in a 521 * core system process. 522 */ 523 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 524 525 /** 526 * Bit for {@link #flags): set if the service is running in a 527 * persistent process. 528 */ 529 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 530 531 /** 532 * Running flags. 533 */ 534 public int flags; 535 536 /** 537 * For special services that are bound to by system code, this is 538 * the package that holds the binding. 539 */ 540 public String clientPackage; 541 542 /** 543 * For special services that are bound to by system code, this is 544 * a string resource providing a user-visible label for who the 545 * client is. 546 */ 547 public int clientLabel; 548 549 public RunningServiceInfo() { 550 } 551 552 public int describeContents() { 553 return 0; 554 } 555 556 public void writeToParcel(Parcel dest, int flags) { 557 ComponentName.writeToParcel(service, dest); 558 dest.writeInt(pid); 559 dest.writeInt(uid); 560 dest.writeString(process); 561 dest.writeInt(foreground ? 1 : 0); 562 dest.writeLong(activeSince); 563 dest.writeInt(started ? 1 : 0); 564 dest.writeInt(clientCount); 565 dest.writeInt(crashCount); 566 dest.writeLong(lastActivityTime); 567 dest.writeLong(restarting); 568 dest.writeInt(this.flags); 569 dest.writeString(clientPackage); 570 dest.writeInt(clientLabel); 571 } 572 573 public void readFromParcel(Parcel source) { 574 service = ComponentName.readFromParcel(source); 575 pid = source.readInt(); 576 uid = source.readInt(); 577 process = source.readString(); 578 foreground = source.readInt() != 0; 579 activeSince = source.readLong(); 580 started = source.readInt() != 0; 581 clientCount = source.readInt(); 582 crashCount = source.readInt(); 583 lastActivityTime = source.readLong(); 584 restarting = source.readLong(); 585 flags = source.readInt(); 586 clientPackage = source.readString(); 587 clientLabel = source.readInt(); 588 } 589 590 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 591 public RunningServiceInfo createFromParcel(Parcel source) { 592 return new RunningServiceInfo(source); 593 } 594 public RunningServiceInfo[] newArray(int size) { 595 return new RunningServiceInfo[size]; 596 } 597 }; 598 599 private RunningServiceInfo(Parcel source) { 600 readFromParcel(source); 601 } 602 } 603 604 /** 605 * Return a list of the services that are currently running. 606 * 607 * @param maxNum The maximum number of entries to return in the list. The 608 * actual number returned may be smaller, depending on how many services 609 * are running. 610 * 611 * @return Returns a list of RunningServiceInfo records describing each of 612 * the running tasks. 613 */ 614 public List<RunningServiceInfo> getRunningServices(int maxNum) 615 throws SecurityException { 616 try { 617 return (List<RunningServiceInfo>)ActivityManagerNative.getDefault() 618 .getServices(maxNum, 0); 619 } catch (RemoteException e) { 620 // System dead, we will be dead too soon! 621 return null; 622 } 623 } 624 625 /** 626 * Returns a PendingIntent you can start to show a control panel for the 627 * given running service. If the service does not have a control panel, 628 * null is returned. 629 */ 630 public PendingIntent getRunningServiceControlPanel(ComponentName service) 631 throws SecurityException { 632 try { 633 return ActivityManagerNative.getDefault() 634 .getRunningServiceControlPanel(service); 635 } catch (RemoteException e) { 636 // System dead, we will be dead too soon! 637 return null; 638 } 639 } 640 641 /** 642 * Information you can retrieve about the available memory through 643 * {@link ActivityManager#getMemoryInfo}. 644 */ 645 public static class MemoryInfo implements Parcelable { 646 /** 647 * The total available memory on the system. This number should not 648 * be considered absolute: due to the nature of the kernel, a significant 649 * portion of this memory is actually in use and needed for the overall 650 * system to run well. 651 */ 652 public long availMem; 653 654 /** 655 * The threshold of {@link #availMem} at which we consider memory to be 656 * low and start killing background services and other non-extraneous 657 * processes. 658 */ 659 public long threshold; 660 661 /** 662 * Set to true if the system considers itself to currently be in a low 663 * memory situation. 664 */ 665 public boolean lowMemory; 666 667 public MemoryInfo() { 668 } 669 670 public int describeContents() { 671 return 0; 672 } 673 674 public void writeToParcel(Parcel dest, int flags) { 675 dest.writeLong(availMem); 676 dest.writeLong(threshold); 677 dest.writeInt(lowMemory ? 1 : 0); 678 } 679 680 public void readFromParcel(Parcel source) { 681 availMem = source.readLong(); 682 threshold = source.readLong(); 683 lowMemory = source.readInt() != 0; 684 } 685 686 public static final Creator<MemoryInfo> CREATOR 687 = new Creator<MemoryInfo>() { 688 public MemoryInfo createFromParcel(Parcel source) { 689 return new MemoryInfo(source); 690 } 691 public MemoryInfo[] newArray(int size) { 692 return new MemoryInfo[size]; 693 } 694 }; 695 696 private MemoryInfo(Parcel source) { 697 readFromParcel(source); 698 } 699 } 700 701 public void getMemoryInfo(MemoryInfo outInfo) { 702 try { 703 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 704 } catch (RemoteException e) { 705 } 706 } 707 708 /** 709 * @hide 710 */ 711 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 712 try { 713 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 714 observer); 715 } catch (RemoteException e) { 716 return false; 717 } 718 } 719 720 /** 721 * Information you can retrieve about any processes that are in an error condition. 722 */ 723 public static class ProcessErrorStateInfo implements Parcelable { 724 /** 725 * Condition codes 726 */ 727 public static final int NO_ERROR = 0; 728 public static final int CRASHED = 1; 729 public static final int NOT_RESPONDING = 2; 730 731 /** 732 * The condition that the process is in. 733 */ 734 public int condition; 735 736 /** 737 * The process name in which the crash or error occurred. 738 */ 739 public String processName; 740 741 /** 742 * The pid of this process; 0 if none 743 */ 744 public int pid; 745 746 /** 747 * The kernel user-ID that has been assigned to this process; 748 * currently this is not a unique ID (multiple applications can have 749 * the same uid). 750 */ 751 public int uid; 752 753 /** 754 * The activity name associated with the error, if known. May be null. 755 */ 756 public String tag; 757 758 /** 759 * A short message describing the error condition. 760 */ 761 public String shortMsg; 762 763 /** 764 * A long message describing the error condition. 765 */ 766 public String longMsg; 767 768 /** 769 * The stack trace where the error originated. May be null. 770 */ 771 public String stackTrace; 772 773 /** 774 * to be deprecated: This value will always be null. 775 */ 776 public byte[] crashData = null; 777 778 public ProcessErrorStateInfo() { 779 } 780 781 public int describeContents() { 782 return 0; 783 } 784 785 public void writeToParcel(Parcel dest, int flags) { 786 dest.writeInt(condition); 787 dest.writeString(processName); 788 dest.writeInt(pid); 789 dest.writeInt(uid); 790 dest.writeString(tag); 791 dest.writeString(shortMsg); 792 dest.writeString(longMsg); 793 dest.writeString(stackTrace); 794 } 795 796 public void readFromParcel(Parcel source) { 797 condition = source.readInt(); 798 processName = source.readString(); 799 pid = source.readInt(); 800 uid = source.readInt(); 801 tag = source.readString(); 802 shortMsg = source.readString(); 803 longMsg = source.readString(); 804 stackTrace = source.readString(); 805 } 806 807 public static final Creator<ProcessErrorStateInfo> CREATOR = 808 new Creator<ProcessErrorStateInfo>() { 809 public ProcessErrorStateInfo createFromParcel(Parcel source) { 810 return new ProcessErrorStateInfo(source); 811 } 812 public ProcessErrorStateInfo[] newArray(int size) { 813 return new ProcessErrorStateInfo[size]; 814 } 815 }; 816 817 private ProcessErrorStateInfo(Parcel source) { 818 readFromParcel(source); 819 } 820 } 821 822 /** 823 * Returns a list of any processes that are currently in an error condition. The result 824 * will be null if all processes are running properly at this time. 825 * 826 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 827 * current error conditions (it will not return an empty list). This list ordering is not 828 * specified. 829 */ 830 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 831 try { 832 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 833 } catch (RemoteException e) { 834 return null; 835 } 836 } 837 838 /** 839 * Information you can retrieve about a running process. 840 */ 841 public static class RunningAppProcessInfo implements Parcelable { 842 /** 843 * The name of the process that this object is associated with 844 */ 845 public String processName; 846 847 /** 848 * The pid of this process; 0 if none 849 */ 850 public int pid; 851 852 /** 853 * The user id of this process. 854 */ 855 public int uid; 856 857 /** 858 * All packages that have been loaded into the process. 859 */ 860 public String pkgList[]; 861 862 /** 863 * Constant for {@link #flags}: this is an app that is unable to 864 * correctly save its state when going to the background, 865 * so it can not be killed while in the background. 866 * @hide 867 */ 868 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 869 870 /** 871 * Constant for {@link #flags}: this process is associated with a 872 * persistent system app. 873 * @hide 874 */ 875 public static final int FLAG_PERSISTENT = 1<<1; 876 877 /** 878 * Flags of information. May be any of 879 * {@link #FLAG_CANT_SAVE_STATE}. 880 * @hide 881 */ 882 public int flags; 883 884 /** 885 * Constant for {@link #importance}: this process is running the 886 * foreground UI. 887 */ 888 public static final int IMPORTANCE_FOREGROUND = 100; 889 890 /** 891 * Constant for {@link #importance}: this process is running something 892 * that is actively visible to the user, though not in the immediate 893 * foreground. 894 */ 895 public static final int IMPORTANCE_VISIBLE = 200; 896 897 /** 898 * Constant for {@link #importance}: this process is running something 899 * that is considered to be actively perceptible to the user. An 900 * example would be an application performing background music playback. 901 */ 902 public static final int IMPORTANCE_PERCEPTIBLE = 130; 903 904 /** 905 * Constant for {@link #importance}: this process is running an 906 * application that can not save its state, and thus can't be killed 907 * while in the background. 908 * @hide 909 */ 910 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 911 912 /** 913 * Constant for {@link #importance}: this process is contains services 914 * that should remain running. 915 */ 916 public static final int IMPORTANCE_SERVICE = 300; 917 918 /** 919 * Constant for {@link #importance}: this process process contains 920 * background code that is expendable. 921 */ 922 public static final int IMPORTANCE_BACKGROUND = 400; 923 924 /** 925 * Constant for {@link #importance}: this process is empty of any 926 * actively running code. 927 */ 928 public static final int IMPORTANCE_EMPTY = 500; 929 930 /** 931 * The relative importance level that the system places on this 932 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 933 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 934 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 935 * constants are numbered so that "more important" values are always 936 * smaller than "less important" values. 937 */ 938 public int importance; 939 940 /** 941 * An additional ordering within a particular {@link #importance} 942 * category, providing finer-grained information about the relative 943 * utility of processes within a category. This number means nothing 944 * except that a smaller values are more recently used (and thus 945 * more important). Currently an LRU value is only maintained for 946 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 947 * be maintained in the future. 948 */ 949 public int lru; 950 951 /** 952 * Constant for {@link #importanceReasonCode}: nothing special has 953 * been specified for the reason for this level. 954 */ 955 public static final int REASON_UNKNOWN = 0; 956 957 /** 958 * Constant for {@link #importanceReasonCode}: one of the application's 959 * content providers is being used by another process. The pid of 960 * the client process is in {@link #importanceReasonPid} and the 961 * target provider in this process is in 962 * {@link #importanceReasonComponent}. 963 */ 964 public static final int REASON_PROVIDER_IN_USE = 1; 965 966 /** 967 * Constant for {@link #importanceReasonCode}: one of the application's 968 * content providers is being used by another process. The pid of 969 * the client process is in {@link #importanceReasonPid} and the 970 * target provider in this process is in 971 * {@link #importanceReasonComponent}. 972 */ 973 public static final int REASON_SERVICE_IN_USE = 2; 974 975 /** 976 * The reason for {@link #importance}, if any. 977 */ 978 public int importanceReasonCode; 979 980 /** 981 * For the specified values of {@link #importanceReasonCode}, this 982 * is the process ID of the other process that is a client of this 983 * process. This will be 0 if no other process is using this one. 984 */ 985 public int importanceReasonPid; 986 987 /** 988 * For the specified values of {@link #importanceReasonCode}, this 989 * is the name of the component that is being used in this process. 990 */ 991 public ComponentName importanceReasonComponent; 992 993 public RunningAppProcessInfo() { 994 importance = IMPORTANCE_FOREGROUND; 995 importanceReasonCode = REASON_UNKNOWN; 996 } 997 998 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 999 processName = pProcessName; 1000 pid = pPid; 1001 pkgList = pArr; 1002 } 1003 1004 public int describeContents() { 1005 return 0; 1006 } 1007 1008 public void writeToParcel(Parcel dest, int flags) { 1009 dest.writeString(processName); 1010 dest.writeInt(pid); 1011 dest.writeInt(uid); 1012 dest.writeStringArray(pkgList); 1013 dest.writeInt(this.flags); 1014 dest.writeInt(importance); 1015 dest.writeInt(lru); 1016 dest.writeInt(importanceReasonCode); 1017 dest.writeInt(importanceReasonPid); 1018 ComponentName.writeToParcel(importanceReasonComponent, dest); 1019 } 1020 1021 public void readFromParcel(Parcel source) { 1022 processName = source.readString(); 1023 pid = source.readInt(); 1024 uid = source.readInt(); 1025 pkgList = source.readStringArray(); 1026 flags = source.readInt(); 1027 importance = source.readInt(); 1028 lru = source.readInt(); 1029 importanceReasonCode = source.readInt(); 1030 importanceReasonPid = source.readInt(); 1031 importanceReasonComponent = ComponentName.readFromParcel(source); 1032 } 1033 1034 public static final Creator<RunningAppProcessInfo> CREATOR = 1035 new Creator<RunningAppProcessInfo>() { 1036 public RunningAppProcessInfo createFromParcel(Parcel source) { 1037 return new RunningAppProcessInfo(source); 1038 } 1039 public RunningAppProcessInfo[] newArray(int size) { 1040 return new RunningAppProcessInfo[size]; 1041 } 1042 }; 1043 1044 private RunningAppProcessInfo(Parcel source) { 1045 readFromParcel(source); 1046 } 1047 } 1048 1049 /** 1050 * Returns a list of application processes installed on external media 1051 * that are running on the device. 1052 * 1053 * @return Returns a list of ApplicationInfo records, or null if none 1054 * This list ordering is not specified. 1055 * @hide 1056 */ 1057 public List<ApplicationInfo> getRunningExternalApplications() { 1058 try { 1059 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1060 } catch (RemoteException e) { 1061 return null; 1062 } 1063 } 1064 1065 /** 1066 * Returns a list of application processes that are running on the device. 1067 * 1068 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1069 * running processes (it will not return an empty list). This list ordering is not 1070 * specified. 1071 */ 1072 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1073 try { 1074 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1075 } catch (RemoteException e) { 1076 return null; 1077 } 1078 } 1079 1080 /** 1081 * Return information about the memory usage of one or more processes. 1082 * 1083 * @param pids The pids of the processes whose memory usage is to be 1084 * retrieved. 1085 * @return Returns an array of memory information, one for each 1086 * requested pid. 1087 */ 1088 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1089 try { 1090 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1091 } catch (RemoteException e) { 1092 return null; 1093 } 1094 } 1095 1096 /** 1097 * @deprecated This is now just a wrapper for 1098 * {@link #killBackgroundProcesses(String)}; the previous behavior here 1099 * is no longer available to applications because it allows them to 1100 * break other applications by removing their alarms, stopping their 1101 * services, etc. 1102 */ 1103 @Deprecated 1104 public void restartPackage(String packageName) { 1105 killBackgroundProcesses(packageName); 1106 } 1107 1108 /** 1109 * Have the system immediately kill all background processes associated 1110 * with the given package. This is the same as the kernel killing those 1111 * processes to reclaim memory; the system will take care of restarting 1112 * these processes in the future as needed. 1113 * 1114 * <p>You must hold the permission 1115 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 1116 * call this method. 1117 * 1118 * @param packageName The name of the package whose processes are to 1119 * be killed. 1120 */ 1121 public void killBackgroundProcesses(String packageName) { 1122 try { 1123 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName); 1124 } catch (RemoteException e) { 1125 } 1126 } 1127 1128 /** 1129 * Have the system perform a force stop of everything associated with 1130 * the given application package. All processes that share its uid 1131 * will be killed, all services it has running stopped, all activities 1132 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 1133 * broadcast will be sent, so that any of its registered alarms can 1134 * be stopped, notifications removed, etc. 1135 * 1136 * <p>You must hold the permission 1137 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 1138 * call this method. 1139 * 1140 * @param packageName The name of the package to be stopped. 1141 * 1142 * @hide This is not available to third party applications due to 1143 * it allowing them to break other applications by stopping their 1144 * services, removing their alarms, etc. 1145 */ 1146 public void forceStopPackage(String packageName) { 1147 try { 1148 ActivityManagerNative.getDefault().forceStopPackage(packageName); 1149 } catch (RemoteException e) { 1150 } 1151 } 1152 1153 /** 1154 * Get the device configuration attributes. 1155 */ 1156 public ConfigurationInfo getDeviceConfigurationInfo() { 1157 try { 1158 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 1159 } catch (RemoteException e) { 1160 } 1161 return null; 1162 } 1163 1164 /** 1165 * Get the preferred density of icons for the launcher. This is used when 1166 * custom drawables are created (e.g., for shortcuts). 1167 * 1168 * @return density in terms of DPI 1169 */ 1170 public int getLauncherLargeIconDensity() { 1171 final Resources res = mContext.getResources(); 1172 final int density = res.getDisplayMetrics().densityDpi; 1173 1174 if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) 1175 != Configuration.SCREENLAYOUT_SIZE_XLARGE) { 1176 return density; 1177 } 1178 1179 switch (density) { 1180 case DisplayMetrics.DENSITY_LOW: 1181 return DisplayMetrics.DENSITY_MEDIUM; 1182 case DisplayMetrics.DENSITY_MEDIUM: 1183 return DisplayMetrics.DENSITY_HIGH; 1184 case DisplayMetrics.DENSITY_HIGH: 1185 return DisplayMetrics.DENSITY_XHIGH; 1186 case DisplayMetrics.DENSITY_XHIGH: 1187 return DisplayMetrics.DENSITY_MEDIUM * 2; 1188 default: 1189 return density; 1190 } 1191 } 1192 1193 /** 1194 * Get the preferred launcher icon size. This is used when custom drawables 1195 * are created (e.g., for shortcuts). 1196 * 1197 * @return dimensions of square icons in terms of pixels 1198 */ 1199 public int getLauncherLargeIconSize() { 1200 final Resources res = mContext.getResources(); 1201 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 1202 1203 if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) 1204 != Configuration.SCREENLAYOUT_SIZE_XLARGE) { 1205 return size; 1206 } 1207 1208 final int density = res.getDisplayMetrics().densityDpi; 1209 1210 switch (density) { 1211 case DisplayMetrics.DENSITY_LOW: 1212 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 1213 case DisplayMetrics.DENSITY_MEDIUM: 1214 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 1215 case DisplayMetrics.DENSITY_HIGH: 1216 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 1217 case DisplayMetrics.DENSITY_XHIGH: 1218 return (size * DisplayMetrics.DENSITY_MEDIUM * 2) / DisplayMetrics.DENSITY_XHIGH; 1219 default: 1220 return size; 1221 } 1222 } 1223 1224 /** 1225 * Returns "true" if the user interface is currently being messed with 1226 * by a monkey. 1227 */ 1228 public static boolean isUserAMonkey() { 1229 try { 1230 return ActivityManagerNative.getDefault().isUserAMonkey(); 1231 } catch (RemoteException e) { 1232 } 1233 return false; 1234 } 1235 1236 /** 1237 * Returns "true" if device is running in a test harness. 1238 */ 1239 public static boolean isRunningInTestHarness() { 1240 return SystemProperties.getBoolean("ro.test_harness", false); 1241 } 1242 1243 /** 1244 * Returns the launch count of each installed package. 1245 * 1246 * @hide 1247 */ 1248 public Map<String, Integer> getAllPackageLaunchCounts() { 1249 try { 1250 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 1251 ServiceManager.getService("usagestats")); 1252 if (usageStatsService == null) { 1253 return new HashMap<String, Integer>(); 1254 } 1255 1256 PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats(); 1257 if (allPkgUsageStats == null) { 1258 return new HashMap<String, Integer>(); 1259 } 1260 1261 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 1262 for (PkgUsageStats pkgUsageStats : allPkgUsageStats) { 1263 launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount); 1264 } 1265 1266 return launchCounts; 1267 } catch (RemoteException e) { 1268 Log.w(TAG, "Could not query launch counts", e); 1269 return new HashMap<String, Integer>(); 1270 } 1271 } 1272} 1273