ActivityManager.java revision a449dc033b79775b8945d9cc5a035a6deb145065
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 * @return The label and description of the current state of this task. 542 */ 543 public String getLabel() { 544 return mLabel; 545 } 546 547 /** 548 * @return The icon that represents the current state of this task. 549 */ 550 public Bitmap getIcon() { 551 return mIcon; 552 } 553 554 /** 555 * @return The color override on the theme's primary color. 556 */ 557 public int getPrimaryColor() { 558 return mColorPrimary; 559 } 560 561 @Override 562 public int describeContents() { 563 return 0; 564 } 565 566 @Override 567 public void writeToParcel(Parcel dest, int flags) { 568 if (mLabel == null) { 569 dest.writeInt(0); 570 } else { 571 dest.writeInt(1); 572 dest.writeString(mLabel); 573 } 574 if (mIcon == null) { 575 dest.writeInt(0); 576 } else { 577 dest.writeInt(1); 578 mIcon.writeToParcel(dest, 0); 579 } 580 dest.writeInt(mColorPrimary); 581 } 582 583 public void readFromParcel(Parcel source) { 584 mLabel = source.readInt() > 0 ? source.readString() : null; 585 mIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 586 mColorPrimary = source.readInt(); 587 } 588 589 public static final Creator<TaskDescription> CREATOR 590 = new Creator<TaskDescription>() { 591 public TaskDescription createFromParcel(Parcel source) { 592 return new TaskDescription(source); 593 } 594 public TaskDescription[] newArray(int size) { 595 return new TaskDescription[size]; 596 } 597 }; 598 599 @Override 600 public String toString() { 601 return "TaskDescription Label: " + mLabel + " Icon: " + mIcon + 602 " colorPrimary: " + mColorPrimary; 603 } 604 } 605 606 /** 607 * Information you can retrieve about tasks that the user has most recently 608 * started or visited. 609 */ 610 public static class RecentTaskInfo implements Parcelable { 611 /** 612 * If this task is currently running, this is the identifier for it. 613 * If it is not running, this will be -1. 614 */ 615 public int id; 616 617 /** 618 * The true identifier of this task, valid even if it is not running. 619 */ 620 public int persistentId; 621 622 /** 623 * The original Intent used to launch the task. You can use this 624 * Intent to re-launch the task (if it is no longer running) or bring 625 * the current task to the front. 626 */ 627 public Intent baseIntent; 628 629 /** 630 * If this task was started from an alias, this is the actual 631 * activity component that was initially started; the component of 632 * the baseIntent in this case is the name of the actual activity 633 * implementation that the alias referred to. Otherwise, this is null. 634 */ 635 public ComponentName origActivity; 636 637 /** 638 * Description of the task's last state. 639 */ 640 public CharSequence description; 641 642 /** 643 * The id of the ActivityStack this Task was on most recently. 644 * @hide 645 */ 646 public int stackId; 647 648 /** 649 * The id of the user the task was running as. 650 * @hide 651 */ 652 public int userId; 653 654 /** 655 * The recent activity values for the highest activity in the stack to have set the values. 656 * {@link Activity#setTaskDescription(android.app.ActivityManager.TaskDescription)}. 657 * 658 * @hide 659 */ 660 public TaskDescription taskDescription; 661 662 public RecentTaskInfo() { 663 } 664 665 @Override 666 public int describeContents() { 667 return 0; 668 } 669 670 @Override 671 public void writeToParcel(Parcel dest, int flags) { 672 dest.writeInt(id); 673 dest.writeInt(persistentId); 674 if (baseIntent != null) { 675 dest.writeInt(1); 676 baseIntent.writeToParcel(dest, 0); 677 } else { 678 dest.writeInt(0); 679 } 680 ComponentName.writeToParcel(origActivity, dest); 681 TextUtils.writeToParcel(description, dest, 682 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 683 if (taskDescription != null) { 684 dest.writeInt(1); 685 taskDescription.writeToParcel(dest, 0); 686 } else { 687 dest.writeInt(0); 688 } 689 dest.writeInt(stackId); 690 dest.writeInt(userId); 691 } 692 693 public void readFromParcel(Parcel source) { 694 id = source.readInt(); 695 persistentId = source.readInt(); 696 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 697 origActivity = ComponentName.readFromParcel(source); 698 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 699 taskDescription = source.readInt() > 0 ? 700 TaskDescription.CREATOR.createFromParcel(source) : null; 701 stackId = source.readInt(); 702 userId = source.readInt(); 703 } 704 705 public static final Creator<RecentTaskInfo> CREATOR 706 = new Creator<RecentTaskInfo>() { 707 public RecentTaskInfo createFromParcel(Parcel source) { 708 return new RecentTaskInfo(source); 709 } 710 public RecentTaskInfo[] newArray(int size) { 711 return new RecentTaskInfo[size]; 712 } 713 }; 714 715 private RecentTaskInfo(Parcel source) { 716 readFromParcel(source); 717 } 718 } 719 720 /** 721 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 722 * that have set their 723 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 724 */ 725 public static final int RECENT_WITH_EXCLUDED = 0x0001; 726 727 /** 728 * Provides a list that does not contain any 729 * recent tasks that currently are not available to the user. 730 */ 731 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 732 733 /** 734 * Provides a list that contains recent tasks for all 735 * profiles of a user. 736 * @hide 737 */ 738 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 739 740 /** 741 * Return a list of the tasks that the user has recently launched, with 742 * the most recent being first and older ones after in order. 743 * 744 * <p><b>Note: this method is only intended for debugging and presenting 745 * task management user interfaces</b>. This should never be used for 746 * core logic in an application, such as deciding between different 747 * behaviors based on the information found here. Such uses are 748 * <em>not</em> supported, and will likely break in the future. For 749 * example, if multiple applications can be actively running at the 750 * same time, assumptions made about the meaning of the data here for 751 * purposes of control flow will be incorrect.</p> 752 * 753 * @param maxNum The maximum number of entries to return in the list. The 754 * actual number returned may be smaller, depending on how many tasks the 755 * user has started and the maximum number the system can remember. 756 * @param flags Information about what to return. May be any combination 757 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 758 * 759 * @return Returns a list of RecentTaskInfo records describing each of 760 * the recent tasks. 761 * 762 * @throws SecurityException Throws SecurityException if the caller does 763 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 764 */ 765 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 766 throws SecurityException { 767 try { 768 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 769 flags, UserHandle.myUserId()); 770 } catch (RemoteException e) { 771 // System dead, we will be dead too soon! 772 return null; 773 } 774 } 775 776 /** 777 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 778 * specific user. It requires holding 779 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 780 * @param maxNum The maximum number of entries to return in the list. The 781 * actual number returned may be smaller, depending on how many tasks the 782 * user has started and the maximum number the system can remember. 783 * @param flags Information about what to return. May be any combination 784 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 785 * 786 * @return Returns a list of RecentTaskInfo records describing each of 787 * the recent tasks. 788 * 789 * @throws SecurityException Throws SecurityException if the caller does 790 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 791 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 792 * @hide 793 */ 794 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 795 throws SecurityException { 796 try { 797 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 798 flags, userId); 799 } catch (RemoteException e) { 800 // System dead, we will be dead too soon! 801 return null; 802 } 803 } 804 805 /** 806 * Information you can retrieve about a particular task that is currently 807 * "running" in the system. Note that a running task does not mean the 808 * given task actually has a process it is actively running in; it simply 809 * means that the user has gone to it and never closed it, but currently 810 * the system may have killed its process and is only holding on to its 811 * last state in order to restart it when the user returns. 812 */ 813 public static class RunningTaskInfo implements Parcelable { 814 /** 815 * A unique identifier for this task. 816 */ 817 public int id; 818 819 /** 820 * The component launched as the first activity in the task. This can 821 * be considered the "application" of this task. 822 */ 823 public ComponentName baseActivity; 824 825 /** 826 * The activity component at the top of the history stack of the task. 827 * This is what the user is currently doing. 828 */ 829 public ComponentName topActivity; 830 831 /** 832 * Thumbnail representation of the task's current state. Currently 833 * always null. 834 */ 835 public Bitmap thumbnail; 836 837 /** 838 * Description of the task's current state. 839 */ 840 public CharSequence description; 841 842 /** 843 * Number of activities in this task. 844 */ 845 public int numActivities; 846 847 /** 848 * Number of activities that are currently running (not stopped 849 * and persisted) in this task. 850 */ 851 public int numRunning; 852 853 /** 854 * Last time task was run. For sorting. 855 * @hide 856 */ 857 public long lastActiveTime; 858 859 public RunningTaskInfo() { 860 } 861 862 public int describeContents() { 863 return 0; 864 } 865 866 public void writeToParcel(Parcel dest, int flags) { 867 dest.writeInt(id); 868 ComponentName.writeToParcel(baseActivity, dest); 869 ComponentName.writeToParcel(topActivity, dest); 870 if (thumbnail != null) { 871 dest.writeInt(1); 872 thumbnail.writeToParcel(dest, 0); 873 } else { 874 dest.writeInt(0); 875 } 876 TextUtils.writeToParcel(description, dest, 877 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 878 dest.writeInt(numActivities); 879 dest.writeInt(numRunning); 880 } 881 882 public void readFromParcel(Parcel source) { 883 id = source.readInt(); 884 baseActivity = ComponentName.readFromParcel(source); 885 topActivity = ComponentName.readFromParcel(source); 886 if (source.readInt() != 0) { 887 thumbnail = Bitmap.CREATOR.createFromParcel(source); 888 } else { 889 thumbnail = null; 890 } 891 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 892 numActivities = source.readInt(); 893 numRunning = source.readInt(); 894 } 895 896 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 897 public RunningTaskInfo createFromParcel(Parcel source) { 898 return new RunningTaskInfo(source); 899 } 900 public RunningTaskInfo[] newArray(int size) { 901 return new RunningTaskInfo[size]; 902 } 903 }; 904 905 private RunningTaskInfo(Parcel source) { 906 readFromParcel(source); 907 } 908 } 909 910 /** 911 * Get the list of tasks associated with the calling application. 912 * 913 * @return The list of tasks associated with the application making this call. 914 * @throws SecurityException 915 */ 916 public List<ActivityManager.AppTask> getAppTasks() { 917 ArrayList<AppTask> tasks = new ArrayList<AppTask>(); 918 List<IAppTask> appTasks; 919 try { 920 appTasks = ActivityManagerNative.getDefault().getAppTasks(); 921 } catch (RemoteException e) { 922 // System dead, we will be dead too soon! 923 return null; 924 } 925 int numAppTasks = appTasks.size(); 926 for (int i = 0; i < numAppTasks; i++) { 927 tasks.add(new AppTask(appTasks.get(i))); 928 } 929 return tasks; 930 } 931 932 /** 933 * Return a list of the tasks that are currently running, with 934 * the most recent being first and older ones after in order. Note that 935 * "running" does not mean any of the task's code is currently loaded or 936 * activity -- the task may have been frozen by the system, so that it 937 * can be restarted in its previous state when next brought to the 938 * foreground. 939 * 940 * <p><b>Note: this method is only intended for debugging and presenting 941 * task management user interfaces</b>. This should never be used for 942 * core logic in an application, such as deciding between different 943 * behaviors based on the information found here. Such uses are 944 * <em>not</em> supported, and will likely break in the future. For 945 * example, if multiple applications can be actively running at the 946 * same time, assumptions made about the meaning of the data here for 947 * purposes of control flow will be incorrect.</p> 948 * 949 * @param maxNum The maximum number of entries to return in the list. The 950 * actual number returned may be smaller, depending on how many tasks the 951 * user has started. 952 * 953 * @return Returns a list of RunningTaskInfo records describing each of 954 * the running tasks. 955 * 956 * @throws SecurityException Throws SecurityException if the caller does 957 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 958 */ 959 public List<RunningTaskInfo> getRunningTasks(int maxNum) 960 throws SecurityException { 961 try { 962 return ActivityManagerNative.getDefault().getTasks(maxNum, 0); 963 } catch (RemoteException e) { 964 // System dead, we will be dead too soon! 965 return null; 966 } 967 } 968 969 /** 970 * Remove some end of a task's activity stack that is not part of 971 * the main application. The selected activities will be finished, so 972 * they are no longer part of the main task. 973 * 974 * @param taskId The identifier of the task. 975 * @param subTaskIndex The number of the sub-task; this corresponds 976 * to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}. 977 * @return Returns true if the sub-task was found and was removed. 978 * 979 * @hide 980 */ 981 public boolean removeSubTask(int taskId, int subTaskIndex) 982 throws SecurityException { 983 try { 984 return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex); 985 } catch (RemoteException e) { 986 // System dead, we will be dead too soon! 987 return false; 988 } 989 } 990 991 /** 992 * If set, the process of the root activity of the task will be killed 993 * as part of removing the task. 994 * @hide 995 */ 996 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 997 998 /** 999 * Completely remove the given task. 1000 * 1001 * @param taskId Identifier of the task to be removed. 1002 * @param flags Additional operational flags. May be 0 or 1003 * {@link #REMOVE_TASK_KILL_PROCESS}. 1004 * @return Returns true if the given task was found and removed. 1005 * 1006 * @hide 1007 */ 1008 public boolean removeTask(int taskId, int flags) 1009 throws SecurityException { 1010 try { 1011 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 1012 } catch (RemoteException e) { 1013 // System dead, we will be dead too soon! 1014 return false; 1015 } 1016 } 1017 1018 /** @hide */ 1019 public static class TaskThumbnails implements Parcelable { 1020 public Bitmap mainThumbnail; 1021 1022 public int numSubThumbbails; 1023 1024 /** @hide */ 1025 public IThumbnailRetriever retriever; 1026 1027 public TaskThumbnails() { 1028 } 1029 1030 public Bitmap getSubThumbnail(int index) { 1031 try { 1032 return retriever.getThumbnail(index); 1033 } catch (RemoteException e) { 1034 return null; 1035 } 1036 } 1037 1038 public int describeContents() { 1039 return 0; 1040 } 1041 1042 public void writeToParcel(Parcel dest, int flags) { 1043 if (mainThumbnail != null) { 1044 dest.writeInt(1); 1045 mainThumbnail.writeToParcel(dest, 0); 1046 } else { 1047 dest.writeInt(0); 1048 } 1049 dest.writeInt(numSubThumbbails); 1050 dest.writeStrongInterface(retriever); 1051 } 1052 1053 public void readFromParcel(Parcel source) { 1054 if (source.readInt() != 0) { 1055 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 1056 } else { 1057 mainThumbnail = null; 1058 } 1059 numSubThumbbails = source.readInt(); 1060 retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder()); 1061 } 1062 1063 public static final Creator<TaskThumbnails> CREATOR = new Creator<TaskThumbnails>() { 1064 public TaskThumbnails createFromParcel(Parcel source) { 1065 return new TaskThumbnails(source); 1066 } 1067 public TaskThumbnails[] newArray(int size) { 1068 return new TaskThumbnails[size]; 1069 } 1070 }; 1071 1072 private TaskThumbnails(Parcel source) { 1073 readFromParcel(source); 1074 } 1075 } 1076 1077 /** @hide */ 1078 public TaskThumbnails getTaskThumbnails(int id) throws SecurityException { 1079 try { 1080 return ActivityManagerNative.getDefault().getTaskThumbnails(id); 1081 } catch (RemoteException e) { 1082 // System dead, we will be dead too soon! 1083 return null; 1084 } 1085 } 1086 1087 /** @hide */ 1088 public Bitmap getTaskTopThumbnail(int id) throws SecurityException { 1089 try { 1090 return ActivityManagerNative.getDefault().getTaskTopThumbnail(id); 1091 } catch (RemoteException e) { 1092 // System dead, we will be dead too soon! 1093 return null; 1094 } 1095 } 1096 1097 /** @hide */ 1098 public boolean isInHomeStack(int taskId) { 1099 try { 1100 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 1101 } catch (RemoteException e) { 1102 // System dead, we will be dead too soon! 1103 return false; 1104 } 1105 } 1106 1107 /** 1108 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 1109 * activity along with the task, so it is positioned immediately behind 1110 * the task. 1111 */ 1112 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 1113 1114 /** 1115 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 1116 * user-instigated action, so the current activity will not receive a 1117 * hint that the user is leaving. 1118 */ 1119 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 1120 1121 /** 1122 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1123 * with a null options argument. 1124 * 1125 * @param taskId The identifier of the task to be moved, as found in 1126 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1127 * @param flags Additional operational flags, 0 or more of 1128 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1129 */ 1130 public void moveTaskToFront(int taskId, int flags) { 1131 moveTaskToFront(taskId, flags, null); 1132 } 1133 1134 /** 1135 * Ask that the task associated with a given task ID be moved to the 1136 * front of the stack, so it is now visible to the user. Requires that 1137 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1138 * or a SecurityException will be thrown. 1139 * 1140 * @param taskId The identifier of the task to be moved, as found in 1141 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1142 * @param flags Additional operational flags, 0 or more of 1143 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1144 * @param options Additional options for the operation, either null or 1145 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1146 * Context.startActivity(Intent, Bundle)}. 1147 */ 1148 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1149 try { 1150 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1151 } catch (RemoteException e) { 1152 // System dead, we will be dead too soon! 1153 } 1154 } 1155 1156 /** 1157 * Information you can retrieve about a particular Service that is 1158 * currently running in the system. 1159 */ 1160 public static class RunningServiceInfo implements Parcelable { 1161 /** 1162 * The service component. 1163 */ 1164 public ComponentName service; 1165 1166 /** 1167 * If non-zero, this is the process the service is running in. 1168 */ 1169 public int pid; 1170 1171 /** 1172 * The UID that owns this service. 1173 */ 1174 public int uid; 1175 1176 /** 1177 * The name of the process this service runs in. 1178 */ 1179 public String process; 1180 1181 /** 1182 * Set to true if the service has asked to run as a foreground process. 1183 */ 1184 public boolean foreground; 1185 1186 /** 1187 * The time when the service was first made active, either by someone 1188 * starting or binding to it. This 1189 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1190 */ 1191 public long activeSince; 1192 1193 /** 1194 * Set to true if this service has been explicitly started. 1195 */ 1196 public boolean started; 1197 1198 /** 1199 * Number of clients connected to the service. 1200 */ 1201 public int clientCount; 1202 1203 /** 1204 * Number of times the service's process has crashed while the service 1205 * is running. 1206 */ 1207 public int crashCount; 1208 1209 /** 1210 * The time when there was last activity in the service (either 1211 * explicit requests to start it or clients binding to it). This 1212 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1213 */ 1214 public long lastActivityTime; 1215 1216 /** 1217 * If non-zero, this service is not currently running, but scheduled to 1218 * restart at the given time. 1219 */ 1220 public long restarting; 1221 1222 /** 1223 * Bit for {@link #flags}: set if this service has been 1224 * explicitly started. 1225 */ 1226 public static final int FLAG_STARTED = 1<<0; 1227 1228 /** 1229 * Bit for {@link #flags}: set if the service has asked to 1230 * run as a foreground process. 1231 */ 1232 public static final int FLAG_FOREGROUND = 1<<1; 1233 1234 /** 1235 * Bit for {@link #flags): set if the service is running in a 1236 * core system process. 1237 */ 1238 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1239 1240 /** 1241 * Bit for {@link #flags): set if the service is running in a 1242 * persistent process. 1243 */ 1244 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1245 1246 /** 1247 * Running flags. 1248 */ 1249 public int flags; 1250 1251 /** 1252 * For special services that are bound to by system code, this is 1253 * the package that holds the binding. 1254 */ 1255 public String clientPackage; 1256 1257 /** 1258 * For special services that are bound to by system code, this is 1259 * a string resource providing a user-visible label for who the 1260 * client is. 1261 */ 1262 public int clientLabel; 1263 1264 public RunningServiceInfo() { 1265 } 1266 1267 public int describeContents() { 1268 return 0; 1269 } 1270 1271 public void writeToParcel(Parcel dest, int flags) { 1272 ComponentName.writeToParcel(service, dest); 1273 dest.writeInt(pid); 1274 dest.writeInt(uid); 1275 dest.writeString(process); 1276 dest.writeInt(foreground ? 1 : 0); 1277 dest.writeLong(activeSince); 1278 dest.writeInt(started ? 1 : 0); 1279 dest.writeInt(clientCount); 1280 dest.writeInt(crashCount); 1281 dest.writeLong(lastActivityTime); 1282 dest.writeLong(restarting); 1283 dest.writeInt(this.flags); 1284 dest.writeString(clientPackage); 1285 dest.writeInt(clientLabel); 1286 } 1287 1288 public void readFromParcel(Parcel source) { 1289 service = ComponentName.readFromParcel(source); 1290 pid = source.readInt(); 1291 uid = source.readInt(); 1292 process = source.readString(); 1293 foreground = source.readInt() != 0; 1294 activeSince = source.readLong(); 1295 started = source.readInt() != 0; 1296 clientCount = source.readInt(); 1297 crashCount = source.readInt(); 1298 lastActivityTime = source.readLong(); 1299 restarting = source.readLong(); 1300 flags = source.readInt(); 1301 clientPackage = source.readString(); 1302 clientLabel = source.readInt(); 1303 } 1304 1305 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1306 public RunningServiceInfo createFromParcel(Parcel source) { 1307 return new RunningServiceInfo(source); 1308 } 1309 public RunningServiceInfo[] newArray(int size) { 1310 return new RunningServiceInfo[size]; 1311 } 1312 }; 1313 1314 private RunningServiceInfo(Parcel source) { 1315 readFromParcel(source); 1316 } 1317 } 1318 1319 /** 1320 * Return a list of the services that are currently running. 1321 * 1322 * <p><b>Note: this method is only intended for debugging or implementing 1323 * service management type user interfaces.</b></p> 1324 * 1325 * @param maxNum The maximum number of entries to return in the list. The 1326 * actual number returned may be smaller, depending on how many services 1327 * are running. 1328 * 1329 * @return Returns a list of RunningServiceInfo records describing each of 1330 * the running tasks. 1331 */ 1332 public List<RunningServiceInfo> getRunningServices(int maxNum) 1333 throws SecurityException { 1334 try { 1335 return ActivityManagerNative.getDefault() 1336 .getServices(maxNum, 0); 1337 } catch (RemoteException e) { 1338 // System dead, we will be dead too soon! 1339 return null; 1340 } 1341 } 1342 1343 /** 1344 * Returns a PendingIntent you can start to show a control panel for the 1345 * given running service. If the service does not have a control panel, 1346 * null is returned. 1347 */ 1348 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1349 throws SecurityException { 1350 try { 1351 return ActivityManagerNative.getDefault() 1352 .getRunningServiceControlPanel(service); 1353 } catch (RemoteException e) { 1354 // System dead, we will be dead too soon! 1355 return null; 1356 } 1357 } 1358 1359 /** 1360 * Information you can retrieve about the available memory through 1361 * {@link ActivityManager#getMemoryInfo}. 1362 */ 1363 public static class MemoryInfo implements Parcelable { 1364 /** 1365 * The available memory on the system. This number should not 1366 * be considered absolute: due to the nature of the kernel, a significant 1367 * portion of this memory is actually in use and needed for the overall 1368 * system to run well. 1369 */ 1370 public long availMem; 1371 1372 /** 1373 * The total memory accessible by the kernel. This is basically the 1374 * RAM size of the device, not including below-kernel fixed allocations 1375 * like DMA buffers, RAM for the baseband CPU, etc. 1376 */ 1377 public long totalMem; 1378 1379 /** 1380 * The threshold of {@link #availMem} at which we consider memory to be 1381 * low and start killing background services and other non-extraneous 1382 * processes. 1383 */ 1384 public long threshold; 1385 1386 /** 1387 * Set to true if the system considers itself to currently be in a low 1388 * memory situation. 1389 */ 1390 public boolean lowMemory; 1391 1392 /** @hide */ 1393 public long hiddenAppThreshold; 1394 /** @hide */ 1395 public long secondaryServerThreshold; 1396 /** @hide */ 1397 public long visibleAppThreshold; 1398 /** @hide */ 1399 public long foregroundAppThreshold; 1400 1401 public MemoryInfo() { 1402 } 1403 1404 public int describeContents() { 1405 return 0; 1406 } 1407 1408 public void writeToParcel(Parcel dest, int flags) { 1409 dest.writeLong(availMem); 1410 dest.writeLong(totalMem); 1411 dest.writeLong(threshold); 1412 dest.writeInt(lowMemory ? 1 : 0); 1413 dest.writeLong(hiddenAppThreshold); 1414 dest.writeLong(secondaryServerThreshold); 1415 dest.writeLong(visibleAppThreshold); 1416 dest.writeLong(foregroundAppThreshold); 1417 } 1418 1419 public void readFromParcel(Parcel source) { 1420 availMem = source.readLong(); 1421 totalMem = source.readLong(); 1422 threshold = source.readLong(); 1423 lowMemory = source.readInt() != 0; 1424 hiddenAppThreshold = source.readLong(); 1425 secondaryServerThreshold = source.readLong(); 1426 visibleAppThreshold = source.readLong(); 1427 foregroundAppThreshold = source.readLong(); 1428 } 1429 1430 public static final Creator<MemoryInfo> CREATOR 1431 = new Creator<MemoryInfo>() { 1432 public MemoryInfo createFromParcel(Parcel source) { 1433 return new MemoryInfo(source); 1434 } 1435 public MemoryInfo[] newArray(int size) { 1436 return new MemoryInfo[size]; 1437 } 1438 }; 1439 1440 private MemoryInfo(Parcel source) { 1441 readFromParcel(source); 1442 } 1443 } 1444 1445 /** 1446 * Return general information about the memory state of the system. This 1447 * can be used to help decide how to manage your own memory, though note 1448 * that polling is not recommended and 1449 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1450 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1451 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1452 * level of your process as needed, which gives a better hint for how to 1453 * manage its memory. 1454 */ 1455 public void getMemoryInfo(MemoryInfo outInfo) { 1456 try { 1457 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1458 } catch (RemoteException e) { 1459 } 1460 } 1461 1462 /** 1463 * Information you can retrieve about an ActivityStack in the system. 1464 * @hide 1465 */ 1466 public static class StackInfo implements Parcelable { 1467 public int stackId; 1468 public Rect bounds = new Rect(); 1469 public int[] taskIds; 1470 public String[] taskNames; 1471 public int displayId; 1472 1473 @Override 1474 public int describeContents() { 1475 return 0; 1476 } 1477 1478 @Override 1479 public void writeToParcel(Parcel dest, int flags) { 1480 dest.writeInt(stackId); 1481 dest.writeInt(bounds.left); 1482 dest.writeInt(bounds.top); 1483 dest.writeInt(bounds.right); 1484 dest.writeInt(bounds.bottom); 1485 dest.writeIntArray(taskIds); 1486 dest.writeStringArray(taskNames); 1487 dest.writeInt(displayId); 1488 } 1489 1490 public void readFromParcel(Parcel source) { 1491 stackId = source.readInt(); 1492 bounds = new Rect( 1493 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1494 taskIds = source.createIntArray(); 1495 taskNames = source.createStringArray(); 1496 displayId = source.readInt(); 1497 } 1498 1499 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1500 @Override 1501 public StackInfo createFromParcel(Parcel source) { 1502 return new StackInfo(source); 1503 } 1504 @Override 1505 public StackInfo[] newArray(int size) { 1506 return new StackInfo[size]; 1507 } 1508 }; 1509 1510 public StackInfo() { 1511 } 1512 1513 private StackInfo(Parcel source) { 1514 readFromParcel(source); 1515 } 1516 1517 public String toString(String prefix) { 1518 StringBuilder sb = new StringBuilder(256); 1519 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1520 sb.append(" bounds="); sb.append(bounds.toShortString()); 1521 sb.append(" displayId="); sb.append(displayId); 1522 sb.append("\n"); 1523 prefix = prefix + " "; 1524 for (int i = 0; i < taskIds.length; ++i) { 1525 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1526 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1527 } 1528 return sb.toString(); 1529 } 1530 1531 @Override 1532 public String toString() { 1533 return toString(""); 1534 } 1535 } 1536 1537 /** 1538 * @hide 1539 */ 1540 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1541 try { 1542 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1543 observer, UserHandle.myUserId()); 1544 } catch (RemoteException e) { 1545 return false; 1546 } 1547 } 1548 1549 /** 1550 * Permits an application to erase its own data from disk. This is equivalent to 1551 * the user choosing to clear the app's data from within the device settings UI. It 1552 * erases all dynamic data associated with the app -- its private data and data in its 1553 * private area on external storage -- but does not remove the installed application 1554 * itself, nor any OBB files. 1555 * 1556 * @return {@code true} if the application successfully requested that the application's 1557 * data be erased; {@code false} otherwise. 1558 */ 1559 public boolean clearApplicationUserData() { 1560 return clearApplicationUserData(mContext.getPackageName(), null); 1561 } 1562 1563 /** 1564 * Information you can retrieve about any processes that are in an error condition. 1565 */ 1566 public static class ProcessErrorStateInfo implements Parcelable { 1567 /** 1568 * Condition codes 1569 */ 1570 public static final int NO_ERROR = 0; 1571 public static final int CRASHED = 1; 1572 public static final int NOT_RESPONDING = 2; 1573 1574 /** 1575 * The condition that the process is in. 1576 */ 1577 public int condition; 1578 1579 /** 1580 * The process name in which the crash or error occurred. 1581 */ 1582 public String processName; 1583 1584 /** 1585 * The pid of this process; 0 if none 1586 */ 1587 public int pid; 1588 1589 /** 1590 * The kernel user-ID that has been assigned to this process; 1591 * currently this is not a unique ID (multiple applications can have 1592 * the same uid). 1593 */ 1594 public int uid; 1595 1596 /** 1597 * The activity name associated with the error, if known. May be null. 1598 */ 1599 public String tag; 1600 1601 /** 1602 * A short message describing the error condition. 1603 */ 1604 public String shortMsg; 1605 1606 /** 1607 * A long message describing the error condition. 1608 */ 1609 public String longMsg; 1610 1611 /** 1612 * The stack trace where the error originated. May be null. 1613 */ 1614 public String stackTrace; 1615 1616 /** 1617 * to be deprecated: This value will always be null. 1618 */ 1619 public byte[] crashData = null; 1620 1621 public ProcessErrorStateInfo() { 1622 } 1623 1624 @Override 1625 public int describeContents() { 1626 return 0; 1627 } 1628 1629 @Override 1630 public void writeToParcel(Parcel dest, int flags) { 1631 dest.writeInt(condition); 1632 dest.writeString(processName); 1633 dest.writeInt(pid); 1634 dest.writeInt(uid); 1635 dest.writeString(tag); 1636 dest.writeString(shortMsg); 1637 dest.writeString(longMsg); 1638 dest.writeString(stackTrace); 1639 } 1640 1641 public void readFromParcel(Parcel source) { 1642 condition = source.readInt(); 1643 processName = source.readString(); 1644 pid = source.readInt(); 1645 uid = source.readInt(); 1646 tag = source.readString(); 1647 shortMsg = source.readString(); 1648 longMsg = source.readString(); 1649 stackTrace = source.readString(); 1650 } 1651 1652 public static final Creator<ProcessErrorStateInfo> CREATOR = 1653 new Creator<ProcessErrorStateInfo>() { 1654 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1655 return new ProcessErrorStateInfo(source); 1656 } 1657 public ProcessErrorStateInfo[] newArray(int size) { 1658 return new ProcessErrorStateInfo[size]; 1659 } 1660 }; 1661 1662 private ProcessErrorStateInfo(Parcel source) { 1663 readFromParcel(source); 1664 } 1665 } 1666 1667 /** 1668 * Returns a list of any processes that are currently in an error condition. The result 1669 * will be null if all processes are running properly at this time. 1670 * 1671 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1672 * current error conditions (it will not return an empty list). This list ordering is not 1673 * specified. 1674 */ 1675 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1676 try { 1677 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1678 } catch (RemoteException e) { 1679 return null; 1680 } 1681 } 1682 1683 /** 1684 * Information you can retrieve about a running process. 1685 */ 1686 public static class RunningAppProcessInfo implements Parcelable { 1687 /** 1688 * The name of the process that this object is associated with 1689 */ 1690 public String processName; 1691 1692 /** 1693 * The pid of this process; 0 if none 1694 */ 1695 public int pid; 1696 1697 /** 1698 * The user id of this process. 1699 */ 1700 public int uid; 1701 1702 /** 1703 * All packages that have been loaded into the process. 1704 */ 1705 public String pkgList[]; 1706 1707 /** 1708 * Constant for {@link #flags}: this is an app that is unable to 1709 * correctly save its state when going to the background, 1710 * so it can not be killed while in the background. 1711 * @hide 1712 */ 1713 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1714 1715 /** 1716 * Constant for {@link #flags}: this process is associated with a 1717 * persistent system app. 1718 * @hide 1719 */ 1720 public static final int FLAG_PERSISTENT = 1<<1; 1721 1722 /** 1723 * Constant for {@link #flags}: this process is associated with a 1724 * persistent system app. 1725 * @hide 1726 */ 1727 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1728 1729 /** 1730 * Flags of information. May be any of 1731 * {@link #FLAG_CANT_SAVE_STATE}. 1732 * @hide 1733 */ 1734 public int flags; 1735 1736 /** 1737 * Last memory trim level reported to the process: corresponds to 1738 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1739 * ComponentCallbacks2.onTrimMemory(int)}. 1740 */ 1741 public int lastTrimLevel; 1742 1743 /** 1744 * Constant for {@link #importance}: this process is running the 1745 * foreground UI. 1746 */ 1747 public static final int IMPORTANCE_FOREGROUND = 100; 1748 1749 /** 1750 * Constant for {@link #importance}: this process is running something 1751 * that is actively visible to the user, though not in the immediate 1752 * foreground. 1753 */ 1754 public static final int IMPORTANCE_VISIBLE = 200; 1755 1756 /** 1757 * Constant for {@link #importance}: this process is running something 1758 * that is considered to be actively perceptible to the user. An 1759 * example would be an application performing background music playback. 1760 */ 1761 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1762 1763 /** 1764 * Constant for {@link #importance}: this process is running an 1765 * application that can not save its state, and thus can't be killed 1766 * while in the background. 1767 * @hide 1768 */ 1769 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1770 1771 /** 1772 * Constant for {@link #importance}: this process is contains services 1773 * that should remain running. 1774 */ 1775 public static final int IMPORTANCE_SERVICE = 300; 1776 1777 /** 1778 * Constant for {@link #importance}: this process process contains 1779 * background code that is expendable. 1780 */ 1781 public static final int IMPORTANCE_BACKGROUND = 400; 1782 1783 /** 1784 * Constant for {@link #importance}: this process is empty of any 1785 * actively running code. 1786 */ 1787 public static final int IMPORTANCE_EMPTY = 500; 1788 1789 /** 1790 * The relative importance level that the system places on this 1791 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1792 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1793 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1794 * constants are numbered so that "more important" values are always 1795 * smaller than "less important" values. 1796 */ 1797 public int importance; 1798 1799 /** 1800 * An additional ordering within a particular {@link #importance} 1801 * category, providing finer-grained information about the relative 1802 * utility of processes within a category. This number means nothing 1803 * except that a smaller values are more recently used (and thus 1804 * more important). Currently an LRU value is only maintained for 1805 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1806 * be maintained in the future. 1807 */ 1808 public int lru; 1809 1810 /** 1811 * Constant for {@link #importanceReasonCode}: nothing special has 1812 * been specified for the reason for this level. 1813 */ 1814 public static final int REASON_UNKNOWN = 0; 1815 1816 /** 1817 * Constant for {@link #importanceReasonCode}: one of the application's 1818 * content providers is being used by another process. The pid of 1819 * the client process is in {@link #importanceReasonPid} and the 1820 * target provider in this process is in 1821 * {@link #importanceReasonComponent}. 1822 */ 1823 public static final int REASON_PROVIDER_IN_USE = 1; 1824 1825 /** 1826 * Constant for {@link #importanceReasonCode}: one of the application's 1827 * content providers is being used by another process. The pid of 1828 * the client process is in {@link #importanceReasonPid} and the 1829 * target provider in this process is in 1830 * {@link #importanceReasonComponent}. 1831 */ 1832 public static final int REASON_SERVICE_IN_USE = 2; 1833 1834 /** 1835 * The reason for {@link #importance}, if any. 1836 */ 1837 public int importanceReasonCode; 1838 1839 /** 1840 * For the specified values of {@link #importanceReasonCode}, this 1841 * is the process ID of the other process that is a client of this 1842 * process. This will be 0 if no other process is using this one. 1843 */ 1844 public int importanceReasonPid; 1845 1846 /** 1847 * For the specified values of {@link #importanceReasonCode}, this 1848 * is the name of the component that is being used in this process. 1849 */ 1850 public ComponentName importanceReasonComponent; 1851 1852 /** 1853 * When {@link #importanceReasonPid} is non-0, this is the importance 1854 * of the other pid. @hide 1855 */ 1856 public int importanceReasonImportance; 1857 1858 /** 1859 * Current process state, as per PROCESS_STATE_* constants. 1860 * @hide 1861 */ 1862 public int processState; 1863 1864 public RunningAppProcessInfo() { 1865 importance = IMPORTANCE_FOREGROUND; 1866 importanceReasonCode = REASON_UNKNOWN; 1867 processState = PROCESS_STATE_IMPORTANT_FOREGROUND; 1868 } 1869 1870 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 1871 processName = pProcessName; 1872 pid = pPid; 1873 pkgList = pArr; 1874 } 1875 1876 public int describeContents() { 1877 return 0; 1878 } 1879 1880 public void writeToParcel(Parcel dest, int flags) { 1881 dest.writeString(processName); 1882 dest.writeInt(pid); 1883 dest.writeInt(uid); 1884 dest.writeStringArray(pkgList); 1885 dest.writeInt(this.flags); 1886 dest.writeInt(lastTrimLevel); 1887 dest.writeInt(importance); 1888 dest.writeInt(lru); 1889 dest.writeInt(importanceReasonCode); 1890 dest.writeInt(importanceReasonPid); 1891 ComponentName.writeToParcel(importanceReasonComponent, dest); 1892 dest.writeInt(importanceReasonImportance); 1893 dest.writeInt(processState); 1894 } 1895 1896 public void readFromParcel(Parcel source) { 1897 processName = source.readString(); 1898 pid = source.readInt(); 1899 uid = source.readInt(); 1900 pkgList = source.readStringArray(); 1901 flags = source.readInt(); 1902 lastTrimLevel = source.readInt(); 1903 importance = source.readInt(); 1904 lru = source.readInt(); 1905 importanceReasonCode = source.readInt(); 1906 importanceReasonPid = source.readInt(); 1907 importanceReasonComponent = ComponentName.readFromParcel(source); 1908 importanceReasonImportance = source.readInt(); 1909 processState = source.readInt(); 1910 } 1911 1912 public static final Creator<RunningAppProcessInfo> CREATOR = 1913 new Creator<RunningAppProcessInfo>() { 1914 public RunningAppProcessInfo createFromParcel(Parcel source) { 1915 return new RunningAppProcessInfo(source); 1916 } 1917 public RunningAppProcessInfo[] newArray(int size) { 1918 return new RunningAppProcessInfo[size]; 1919 } 1920 }; 1921 1922 private RunningAppProcessInfo(Parcel source) { 1923 readFromParcel(source); 1924 } 1925 } 1926 1927 /** 1928 * Returns a list of application processes installed on external media 1929 * that are running on the device. 1930 * 1931 * <p><b>Note: this method is only intended for debugging or building 1932 * a user-facing process management UI.</b></p> 1933 * 1934 * @return Returns a list of ApplicationInfo records, or null if none 1935 * This list ordering is not specified. 1936 * @hide 1937 */ 1938 public List<ApplicationInfo> getRunningExternalApplications() { 1939 try { 1940 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 1941 } catch (RemoteException e) { 1942 return null; 1943 } 1944 } 1945 1946 /** 1947 * Returns a list of application processes that are running on the device. 1948 * 1949 * <p><b>Note: this method is only intended for debugging or building 1950 * a user-facing process management UI.</b></p> 1951 * 1952 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 1953 * running processes (it will not return an empty list). This list ordering is not 1954 * specified. 1955 */ 1956 public List<RunningAppProcessInfo> getRunningAppProcesses() { 1957 try { 1958 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 1959 } catch (RemoteException e) { 1960 return null; 1961 } 1962 } 1963 1964 /** 1965 * Return global memory state information for the calling process. This 1966 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 1967 * only fields that will be filled in are 1968 * {@link RunningAppProcessInfo#pid}, 1969 * {@link RunningAppProcessInfo#uid}, 1970 * {@link RunningAppProcessInfo#lastTrimLevel}, 1971 * {@link RunningAppProcessInfo#importance}, 1972 * {@link RunningAppProcessInfo#lru}, and 1973 * {@link RunningAppProcessInfo#importanceReasonCode}. 1974 */ 1975 static public void getMyMemoryState(RunningAppProcessInfo outState) { 1976 try { 1977 ActivityManagerNative.getDefault().getMyMemoryState(outState); 1978 } catch (RemoteException e) { 1979 } 1980 } 1981 1982 /** 1983 * Return information about the memory usage of one or more processes. 1984 * 1985 * <p><b>Note: this method is only intended for debugging or building 1986 * a user-facing process management UI.</b></p> 1987 * 1988 * @param pids The pids of the processes whose memory usage is to be 1989 * retrieved. 1990 * @return Returns an array of memory information, one for each 1991 * requested pid. 1992 */ 1993 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 1994 try { 1995 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 1996 } catch (RemoteException e) { 1997 return null; 1998 } 1999 } 2000 2001 /** 2002 * @deprecated This is now just a wrapper for 2003 * {@link #killBackgroundProcesses(String)}; the previous behavior here 2004 * is no longer available to applications because it allows them to 2005 * break other applications by removing their alarms, stopping their 2006 * services, etc. 2007 */ 2008 @Deprecated 2009 public void restartPackage(String packageName) { 2010 killBackgroundProcesses(packageName); 2011 } 2012 2013 /** 2014 * Have the system immediately kill all background processes associated 2015 * with the given package. This is the same as the kernel killing those 2016 * processes to reclaim memory; the system will take care of restarting 2017 * these processes in the future as needed. 2018 * 2019 * <p>You must hold the permission 2020 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 2021 * call this method. 2022 * 2023 * @param packageName The name of the package whose processes are to 2024 * be killed. 2025 */ 2026 public void killBackgroundProcesses(String packageName) { 2027 try { 2028 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 2029 UserHandle.myUserId()); 2030 } catch (RemoteException e) { 2031 } 2032 } 2033 2034 /** 2035 * Have the system perform a force stop of everything associated with 2036 * the given application package. All processes that share its uid 2037 * will be killed, all services it has running stopped, all activities 2038 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 2039 * broadcast will be sent, so that any of its registered alarms can 2040 * be stopped, notifications removed, etc. 2041 * 2042 * <p>You must hold the permission 2043 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 2044 * call this method. 2045 * 2046 * @param packageName The name of the package to be stopped. 2047 * 2048 * @hide This is not available to third party applications due to 2049 * it allowing them to break other applications by stopping their 2050 * services, removing their alarms, etc. 2051 */ 2052 public void forceStopPackage(String packageName) { 2053 try { 2054 ActivityManagerNative.getDefault().forceStopPackage(packageName, 2055 UserHandle.myUserId()); 2056 } catch (RemoteException e) { 2057 } 2058 } 2059 2060 /** 2061 * Get the device configuration attributes. 2062 */ 2063 public ConfigurationInfo getDeviceConfigurationInfo() { 2064 try { 2065 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 2066 } catch (RemoteException e) { 2067 } 2068 return null; 2069 } 2070 2071 /** 2072 * Get the preferred density of icons for the launcher. This is used when 2073 * custom drawables are created (e.g., for shortcuts). 2074 * 2075 * @return density in terms of DPI 2076 */ 2077 public int getLauncherLargeIconDensity() { 2078 final Resources res = mContext.getResources(); 2079 final int density = res.getDisplayMetrics().densityDpi; 2080 final int sw = res.getConfiguration().smallestScreenWidthDp; 2081 2082 if (sw < 600) { 2083 // Smaller than approx 7" tablets, use the regular icon size. 2084 return density; 2085 } 2086 2087 switch (density) { 2088 case DisplayMetrics.DENSITY_LOW: 2089 return DisplayMetrics.DENSITY_MEDIUM; 2090 case DisplayMetrics.DENSITY_MEDIUM: 2091 return DisplayMetrics.DENSITY_HIGH; 2092 case DisplayMetrics.DENSITY_TV: 2093 return DisplayMetrics.DENSITY_XHIGH; 2094 case DisplayMetrics.DENSITY_HIGH: 2095 return DisplayMetrics.DENSITY_XHIGH; 2096 case DisplayMetrics.DENSITY_XHIGH: 2097 return DisplayMetrics.DENSITY_XXHIGH; 2098 case DisplayMetrics.DENSITY_XXHIGH: 2099 return DisplayMetrics.DENSITY_XHIGH * 2; 2100 default: 2101 // The density is some abnormal value. Return some other 2102 // abnormal value that is a reasonable scaling of it. 2103 return (int)((density*1.5f)+.5f); 2104 } 2105 } 2106 2107 /** 2108 * Get the preferred launcher icon size. This is used when custom drawables 2109 * are created (e.g., for shortcuts). 2110 * 2111 * @return dimensions of square icons in terms of pixels 2112 */ 2113 public int getLauncherLargeIconSize() { 2114 return getLauncherLargeIconSizeInner(mContext); 2115 } 2116 2117 static int getLauncherLargeIconSizeInner(Context context) { 2118 final Resources res = context.getResources(); 2119 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 2120 final int sw = res.getConfiguration().smallestScreenWidthDp; 2121 2122 if (sw < 600) { 2123 // Smaller than approx 7" tablets, use the regular icon size. 2124 return size; 2125 } 2126 2127 final int density = res.getDisplayMetrics().densityDpi; 2128 2129 switch (density) { 2130 case DisplayMetrics.DENSITY_LOW: 2131 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2132 case DisplayMetrics.DENSITY_MEDIUM: 2133 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2134 case DisplayMetrics.DENSITY_TV: 2135 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2136 case DisplayMetrics.DENSITY_HIGH: 2137 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2138 case DisplayMetrics.DENSITY_XHIGH: 2139 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2140 case DisplayMetrics.DENSITY_XXHIGH: 2141 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2142 default: 2143 // The density is some abnormal value. Return some other 2144 // abnormal value that is a reasonable scaling of it. 2145 return (int)((size*1.5f) + .5f); 2146 } 2147 } 2148 2149 /** 2150 * Returns "true" if the user interface is currently being messed with 2151 * by a monkey. 2152 */ 2153 public static boolean isUserAMonkey() { 2154 try { 2155 return ActivityManagerNative.getDefault().isUserAMonkey(); 2156 } catch (RemoteException e) { 2157 } 2158 return false; 2159 } 2160 2161 /** 2162 * Returns "true" if device is running in a test harness. 2163 */ 2164 public static boolean isRunningInTestHarness() { 2165 return SystemProperties.getBoolean("ro.test_harness", false); 2166 } 2167 2168 /** 2169 * Returns the launch count of each installed package. 2170 * 2171 * @hide 2172 */ 2173 public Map<String, Integer> getAllPackageLaunchCounts() { 2174 try { 2175 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2176 ServiceManager.getService("usagestats")); 2177 if (usageStatsService == null) { 2178 return new HashMap<String, Integer>(); 2179 } 2180 2181 UsageStats.PackageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats( 2182 ActivityThread.currentPackageName()); 2183 if (allPkgUsageStats == null) { 2184 return new HashMap<String, Integer>(); 2185 } 2186 2187 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2188 for (UsageStats.PackageStats pkgUsageStats : allPkgUsageStats) { 2189 launchCounts.put(pkgUsageStats.getPackageName(), pkgUsageStats.getLaunchCount()); 2190 } 2191 2192 return launchCounts; 2193 } catch (RemoteException e) { 2194 Log.w(TAG, "Could not query launch counts", e); 2195 return new HashMap<String, Integer>(); 2196 } 2197 } 2198 2199 /** @hide */ 2200 public static int checkComponentPermission(String permission, int uid, 2201 int owningUid, boolean exported) { 2202 // Root, system server get to do everything. 2203 if (uid == 0 || uid == Process.SYSTEM_UID) { 2204 return PackageManager.PERMISSION_GRANTED; 2205 } 2206 // Isolated processes don't get any permissions. 2207 if (UserHandle.isIsolated(uid)) { 2208 return PackageManager.PERMISSION_DENIED; 2209 } 2210 // If there is a uid that owns whatever is being accessed, it has 2211 // blanket access to it regardless of the permissions it requires. 2212 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2213 return PackageManager.PERMISSION_GRANTED; 2214 } 2215 // If the target is not exported, then nobody else can get to it. 2216 if (!exported) { 2217 /* 2218 RuntimeException here = new RuntimeException("here"); 2219 here.fillInStackTrace(); 2220 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2221 here); 2222 */ 2223 return PackageManager.PERMISSION_DENIED; 2224 } 2225 if (permission == null) { 2226 return PackageManager.PERMISSION_GRANTED; 2227 } 2228 try { 2229 return AppGlobals.getPackageManager() 2230 .checkUidPermission(permission, uid); 2231 } catch (RemoteException e) { 2232 // Should never happen, but if it does... deny! 2233 Slog.e(TAG, "PackageManager is dead?!?", e); 2234 } 2235 return PackageManager.PERMISSION_DENIED; 2236 } 2237 2238 /** @hide */ 2239 public static int checkUidPermission(String permission, int uid) { 2240 try { 2241 return AppGlobals.getPackageManager() 2242 .checkUidPermission(permission, uid); 2243 } catch (RemoteException e) { 2244 // Should never happen, but if it does... deny! 2245 Slog.e(TAG, "PackageManager is dead?!?", e); 2246 } 2247 return PackageManager.PERMISSION_DENIED; 2248 } 2249 2250 /** 2251 * @hide 2252 * Helper for dealing with incoming user arguments to system service calls. 2253 * Takes care of checking permissions and converting USER_CURRENT to the 2254 * actual current user. 2255 * 2256 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2257 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2258 * @param userId The user id argument supplied by the caller -- this is the user 2259 * they want to run as. 2260 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2261 * to get a USER_ALL returned and deal with it correctly. If false, 2262 * an exception will be thrown if USER_ALL is supplied. 2263 * @param requireFull If true, the caller must hold 2264 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2265 * different user than their current process; otherwise they must hold 2266 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2267 * @param name Optional textual name of the incoming call; only for generating error messages. 2268 * @param callerPackage Optional package name of caller; only for error messages. 2269 * 2270 * @return Returns the user ID that the call should run as. Will always be a concrete 2271 * user number, unless <var>allowAll</var> is true in which case it could also be 2272 * USER_ALL. 2273 */ 2274 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2275 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2276 if (UserHandle.getUserId(callingUid) == userId) { 2277 return userId; 2278 } 2279 try { 2280 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2281 callingUid, userId, allowAll, requireFull, name, callerPackage); 2282 } catch (RemoteException e) { 2283 throw new SecurityException("Failed calling activity manager", e); 2284 } 2285 } 2286 2287 /** @hide */ 2288 public static int getCurrentUser() { 2289 UserInfo ui; 2290 try { 2291 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2292 return ui != null ? ui.id : 0; 2293 } catch (RemoteException e) { 2294 return 0; 2295 } 2296 } 2297 2298 /** 2299 * Returns the usage statistics of each installed package. 2300 * 2301 * @hide 2302 */ 2303 public UsageStats.PackageStats[] getAllPackageUsageStats() { 2304 try { 2305 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2306 ServiceManager.getService("usagestats")); 2307 if (usageStatsService != null) { 2308 return usageStatsService.getAllPkgUsageStats(ActivityThread.currentPackageName()); 2309 } 2310 } catch (RemoteException e) { 2311 Log.w(TAG, "Could not query usage stats", e); 2312 } 2313 return new UsageStats.PackageStats[0]; 2314 } 2315 2316 /** 2317 * @param userid the user's id. Zero indicates the default user 2318 * @hide 2319 */ 2320 public boolean switchUser(int userid) { 2321 try { 2322 return ActivityManagerNative.getDefault().switchUser(userid); 2323 } catch (RemoteException e) { 2324 return false; 2325 } 2326 } 2327 2328 /** 2329 * Return whether the given user is actively running. This means that 2330 * the user is in the "started" state, not "stopped" -- it is currently 2331 * allowed to run code through scheduled alarms, receiving broadcasts, 2332 * etc. A started user may be either the current foreground user or a 2333 * background user; the result here does not distinguish between the two. 2334 * @param userid the user's id. Zero indicates the default user. 2335 * @hide 2336 */ 2337 public boolean isUserRunning(int userid) { 2338 try { 2339 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2340 } catch (RemoteException e) { 2341 return false; 2342 } 2343 } 2344 2345 /** 2346 * Perform a system dump of various state associated with the given application 2347 * package name. This call blocks while the dump is being performed, so should 2348 * not be done on a UI thread. The data will be written to the given file 2349 * descriptor as text. An application must hold the 2350 * {@link android.Manifest.permission#DUMP} permission to make this call. 2351 * @param fd The file descriptor that the dump should be written to. The file 2352 * descriptor is <em>not</em> closed by this function; the caller continues to 2353 * own it. 2354 * @param packageName The name of the package that is to be dumped. 2355 */ 2356 public void dumpPackageState(FileDescriptor fd, String packageName) { 2357 dumpPackageStateStatic(fd, packageName); 2358 } 2359 2360 /** 2361 * @hide 2362 */ 2363 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2364 FileOutputStream fout = new FileOutputStream(fd); 2365 PrintWriter pw = new FastPrintWriter(fout); 2366 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2367 "-a", "package", packageName }); 2368 pw.println(); 2369 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2370 pw.println(); 2371 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2372 pw.println(); 2373 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2374 pw.println(); 2375 dumpService(pw, fd, "package", new String[] { packageName }); 2376 pw.println(); 2377 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2378 pw.flush(); 2379 } 2380 2381 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2382 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2383 IBinder service = ServiceManager.checkService(name); 2384 if (service == null) { 2385 pw.println(" (Service not found)"); 2386 return; 2387 } 2388 TransferPipe tp = null; 2389 try { 2390 pw.flush(); 2391 tp = new TransferPipe(); 2392 tp.setBufferPrefix(" "); 2393 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2394 tp.go(fd); 2395 } catch (Throwable e) { 2396 if (tp != null) { 2397 tp.kill(); 2398 } 2399 pw.println("Failure dumping service:"); 2400 e.printStackTrace(pw); 2401 } 2402 } 2403 2404 /** 2405 * @hide 2406 */ 2407 public void startLockTaskMode(int taskId) { 2408 try { 2409 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2410 } catch (RemoteException e) { 2411 } 2412 } 2413 2414 /** 2415 * @hide 2416 */ 2417 public void stopLockTaskMode() { 2418 try { 2419 ActivityManagerNative.getDefault().stopLockTaskMode(); 2420 } catch (RemoteException e) { 2421 } 2422 } 2423 2424 /** 2425 * @hide 2426 */ 2427 public boolean isInLockTaskMode() { 2428 try { 2429 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2430 } catch (RemoteException e) { 2431 return false; 2432 } 2433 } 2434 2435 /** 2436 * The AppTask allows you to manage your own application's tasks. 2437 * See {@link android.app.ActivityManager#getAppTasks()} 2438 */ 2439 public static class AppTask { 2440 private IAppTask mAppTaskImpl; 2441 2442 /** @hide */ 2443 public AppTask(IAppTask task) { 2444 mAppTaskImpl = task; 2445 } 2446 2447 /** 2448 * Finishes all activities in this task and removes it from the recent tasks list. 2449 */ 2450 public void finishAndRemoveTask() { 2451 try { 2452 mAppTaskImpl.finishAndRemoveTask(); 2453 } catch (RemoteException e) { 2454 Slog.e(TAG, "Invalid AppTask", e); 2455 } 2456 } 2457 2458 /** 2459 * Get the RecentTaskInfo associated with this task. 2460 * 2461 * @return The RecentTaskInfo for this task, or null if the task no longer exists. 2462 */ 2463 public RecentTaskInfo getTaskInfo() { 2464 try { 2465 return mAppTaskImpl.getTaskInfo(); 2466 } catch (RemoteException e) { 2467 Slog.e(TAG, "Invalid AppTask", e); 2468 return null; 2469 } 2470 } 2471 } 2472} 2473