ActivityManager.java revision 5c1b42e4f5d7307ad09d0d7ad094adf34650fb62
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.annotation.NonNull; 20import android.annotation.Nullable; 21import android.graphics.Canvas; 22import android.graphics.Matrix; 23import android.graphics.Point; 24import android.os.BatteryStats; 25import android.os.IBinder; 26import android.os.ParcelFileDescriptor; 27import com.android.internal.app.ProcessStats; 28import com.android.internal.os.TransferPipe; 29import com.android.internal.util.FastPrintWriter; 30 31import android.content.ComponentName; 32import android.content.Context; 33import android.content.Intent; 34import android.content.pm.ApplicationInfo; 35import android.content.pm.ConfigurationInfo; 36import android.content.pm.IPackageDataObserver; 37import android.content.pm.PackageManager; 38import android.content.pm.UserInfo; 39import android.content.res.Resources; 40import android.graphics.Bitmap; 41import android.graphics.Color; 42import android.graphics.Rect; 43import android.os.Bundle; 44import android.os.Debug; 45import android.os.Handler; 46import android.os.Parcel; 47import android.os.Parcelable; 48import android.os.Process; 49import android.os.RemoteException; 50import android.os.ServiceManager; 51import android.os.SystemProperties; 52import android.os.UserHandle; 53import android.text.TextUtils; 54import android.util.DisplayMetrics; 55import android.util.Slog; 56 57import java.io.FileDescriptor; 58import java.io.FileOutputStream; 59import java.io.PrintWriter; 60import java.util.ArrayList; 61import java.util.List; 62 63/** 64 * Interact with the overall activities running in the system. 65 */ 66public class ActivityManager { 67 private static String TAG = "ActivityManager"; 68 private static boolean localLOGV = false; 69 70 private final Context mContext; 71 private final Handler mHandler; 72 73 /** 74 * <a href="{@docRoot}guide/topics/manifest/meta-data-element.html">{@code 75 * <meta-data>}</a> name for a 'home' Activity that declares a package that is to be 76 * uninstalled in lieu of the declaring one. The package named here must be 77 * signed with the same certificate as the one declaring the {@code <meta-data>}. 78 */ 79 public static final String META_HOME_ALTERNATE = "android.app.home.alternate"; 80 81 /** 82 * Result for IActivityManager.startActivity: trying to start an activity under voice 83 * control when that activity does not support the VOICE category. 84 * @hide 85 */ 86 public static final int START_NOT_VOICE_COMPATIBLE = -7; 87 88 /** 89 * Result for IActivityManager.startActivity: an error where the 90 * start had to be canceled. 91 * @hide 92 */ 93 public static final int START_CANCELED = -6; 94 95 /** 96 * Result for IActivityManager.startActivity: an error where the 97 * thing being started is not an activity. 98 * @hide 99 */ 100 public static final int START_NOT_ACTIVITY = -5; 101 102 /** 103 * Result for IActivityManager.startActivity: an error where the 104 * caller does not have permission to start the activity. 105 * @hide 106 */ 107 public static final int START_PERMISSION_DENIED = -4; 108 109 /** 110 * Result for IActivityManager.startActivity: an error where the 111 * caller has requested both to forward a result and to receive 112 * a result. 113 * @hide 114 */ 115 public static final int START_FORWARD_AND_REQUEST_CONFLICT = -3; 116 117 /** 118 * Result for IActivityManager.startActivity: an error where the 119 * requested class is not found. 120 * @hide 121 */ 122 public static final int START_CLASS_NOT_FOUND = -2; 123 124 /** 125 * Result for IActivityManager.startActivity: an error where the 126 * given Intent could not be resolved to an activity. 127 * @hide 128 */ 129 public static final int START_INTENT_NOT_RESOLVED = -1; 130 131 /** 132 * Result for IActivityManaqer.startActivity: the activity was started 133 * successfully as normal. 134 * @hide 135 */ 136 public static final int START_SUCCESS = 0; 137 138 /** 139 * Result for IActivityManaqer.startActivity: the caller asked that the Intent not 140 * be executed if it is the recipient, and that is indeed the case. 141 * @hide 142 */ 143 public static final int START_RETURN_INTENT_TO_CALLER = 1; 144 145 /** 146 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 147 * a task was simply brought to the foreground. 148 * @hide 149 */ 150 public static final int START_TASK_TO_FRONT = 2; 151 152 /** 153 * Result for IActivityManaqer.startActivity: activity wasn't really started, but 154 * the given Intent was given to the existing top activity. 155 * @hide 156 */ 157 public static final int START_DELIVERED_TO_TOP = 3; 158 159 /** 160 * Result for IActivityManaqer.startActivity: request was canceled because 161 * app switches are temporarily canceled to ensure the user's last request 162 * (such as pressing home) is performed. 163 * @hide 164 */ 165 public static final int START_SWITCHES_CANCELED = 4; 166 167 /** 168 * Result for IActivityManaqer.startActivity: a new activity was attempted to be started 169 * while in Lock Task Mode. 170 * @hide 171 */ 172 public static final int START_RETURN_LOCK_TASK_MODE_VIOLATION = 5; 173 174 /** 175 * Flag for IActivityManaqer.startActivity: do special start mode where 176 * a new activity is launched only if it is needed. 177 * @hide 178 */ 179 public static final int START_FLAG_ONLY_IF_NEEDED = 1<<0; 180 181 /** 182 * Flag for IActivityManaqer.startActivity: launch the app for 183 * debugging. 184 * @hide 185 */ 186 public static final int START_FLAG_DEBUG = 1<<1; 187 188 /** 189 * Flag for IActivityManaqer.startActivity: launch the app for 190 * OpenGL tracing. 191 * @hide 192 */ 193 public static final int START_FLAG_OPENGL_TRACES = 1<<2; 194 195 /** 196 * Flag for IActivityManaqer.startActivity: if the app is being 197 * launched for profiling, automatically stop the profiler once done. 198 * @hide 199 */ 200 public static final int START_FLAG_AUTO_STOP_PROFILER = 1<<3; 201 202 /** 203 * Result for IActivityManaqer.broadcastIntent: success! 204 * @hide 205 */ 206 public static final int BROADCAST_SUCCESS = 0; 207 208 /** 209 * Result for IActivityManaqer.broadcastIntent: attempt to broadcast 210 * a sticky intent without appropriate permission. 211 * @hide 212 */ 213 public static final int BROADCAST_STICKY_CANT_HAVE_PERMISSION = -1; 214 215 /** 216 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 217 * for a sendBroadcast operation. 218 * @hide 219 */ 220 public static final int INTENT_SENDER_BROADCAST = 1; 221 222 /** 223 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 224 * for a startActivity operation. 225 * @hide 226 */ 227 public static final int INTENT_SENDER_ACTIVITY = 2; 228 229 /** 230 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 231 * for an activity result operation. 232 * @hide 233 */ 234 public static final int INTENT_SENDER_ACTIVITY_RESULT = 3; 235 236 /** 237 * Type for IActivityManaqer.getIntentSender: this PendingIntent is 238 * for a startService operation. 239 * @hide 240 */ 241 public static final int INTENT_SENDER_SERVICE = 4; 242 243 /** @hide User operation call: success! */ 244 public static final int USER_OP_SUCCESS = 0; 245 246 /** @hide User operation call: given user id is not known. */ 247 public static final int USER_OP_UNKNOWN_USER = -1; 248 249 /** @hide User operation call: given user id is the current user, can't be stopped. */ 250 public static final int USER_OP_IS_CURRENT = -2; 251 252 /** @hide Process is a persistent system process. */ 253 public static final int PROCESS_STATE_PERSISTENT = 0; 254 255 /** @hide Process is a persistent system process and is doing UI. */ 256 public static final int PROCESS_STATE_PERSISTENT_UI = 1; 257 258 /** @hide Process is hosting the current top activities. Note that this covers 259 * all activities that are visible to the user. */ 260 public static final int PROCESS_STATE_TOP = 2; 261 262 /** @hide Process is important to the user, and something they are aware of. */ 263 public static final int PROCESS_STATE_IMPORTANT_FOREGROUND = 3; 264 265 /** @hide Process is important to the user, but not something they are aware of. */ 266 public static final int PROCESS_STATE_IMPORTANT_BACKGROUND = 4; 267 268 /** @hide Process is in the background running a backup/restore operation. */ 269 public static final int PROCESS_STATE_BACKUP = 5; 270 271 /** @hide Process is in the background, but it can't restore its state so we want 272 * to try to avoid killing it. */ 273 public static final int PROCESS_STATE_HEAVY_WEIGHT = 6; 274 275 /** @hide Process is in the background running a service. Unlike oom_adj, this level 276 * is used for both the normal running in background state and the executing 277 * operations state. */ 278 public static final int PROCESS_STATE_SERVICE = 7; 279 280 /** @hide Process is in the background running a receiver. Note that from the 281 * perspective of oom_adj receivers run at a higher foreground level, but for our 282 * prioritization here that is not necessary and putting them below services means 283 * many fewer changes in some process states as they receive broadcasts. */ 284 public static final int PROCESS_STATE_RECEIVER = 8; 285 286 /** @hide Process is in the background but hosts the home activity. */ 287 public static final int PROCESS_STATE_HOME = 9; 288 289 /** @hide Process is in the background but hosts the last shown activity. */ 290 public static final int PROCESS_STATE_LAST_ACTIVITY = 10; 291 292 /** @hide Process is being cached for later use and contains activities. */ 293 public static final int PROCESS_STATE_CACHED_ACTIVITY = 11; 294 295 /** @hide Process is being cached for later use and is a client of another cached 296 * process that contains activities. */ 297 public static final int PROCESS_STATE_CACHED_ACTIVITY_CLIENT = 12; 298 299 /** @hide Process is being cached for later use and is empty. */ 300 public static final int PROCESS_STATE_CACHED_EMPTY = 13; 301 302 Point mAppTaskThumbnailSize; 303 304 /*package*/ ActivityManager(Context context, Handler handler) { 305 mContext = context; 306 mHandler = handler; 307 } 308 309 /** 310 * Screen compatibility mode: the application most always run in 311 * compatibility mode. 312 * @hide 313 */ 314 public static final int COMPAT_MODE_ALWAYS = -1; 315 316 /** 317 * Screen compatibility mode: the application can never run in 318 * compatibility mode. 319 * @hide 320 */ 321 public static final int COMPAT_MODE_NEVER = -2; 322 323 /** 324 * Screen compatibility mode: unknown. 325 * @hide 326 */ 327 public static final int COMPAT_MODE_UNKNOWN = -3; 328 329 /** 330 * Screen compatibility mode: the application currently has compatibility 331 * mode disabled. 332 * @hide 333 */ 334 public static final int COMPAT_MODE_DISABLED = 0; 335 336 /** 337 * Screen compatibility mode: the application currently has compatibility 338 * mode enabled. 339 * @hide 340 */ 341 public static final int COMPAT_MODE_ENABLED = 1; 342 343 /** 344 * Screen compatibility mode: request to toggle the application's 345 * compatibility mode. 346 * @hide 347 */ 348 public static final int COMPAT_MODE_TOGGLE = 2; 349 350 /** @hide */ 351 public int getFrontActivityScreenCompatMode() { 352 try { 353 return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode(); 354 } catch (RemoteException e) { 355 // System dead, we will be dead too soon! 356 return 0; 357 } 358 } 359 360 /** @hide */ 361 public void setFrontActivityScreenCompatMode(int mode) { 362 try { 363 ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode); 364 } catch (RemoteException e) { 365 // System dead, we will be dead too soon! 366 } 367 } 368 369 /** @hide */ 370 public int getPackageScreenCompatMode(String packageName) { 371 try { 372 return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName); 373 } catch (RemoteException e) { 374 // System dead, we will be dead too soon! 375 return 0; 376 } 377 } 378 379 /** @hide */ 380 public void setPackageScreenCompatMode(String packageName, int mode) { 381 try { 382 ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode); 383 } catch (RemoteException e) { 384 // System dead, we will be dead too soon! 385 } 386 } 387 388 /** @hide */ 389 public boolean getPackageAskScreenCompat(String packageName) { 390 try { 391 return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName); 392 } catch (RemoteException e) { 393 // System dead, we will be dead too soon! 394 return false; 395 } 396 } 397 398 /** @hide */ 399 public void setPackageAskScreenCompat(String packageName, boolean ask) { 400 try { 401 ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask); 402 } catch (RemoteException e) { 403 // System dead, we will be dead too soon! 404 } 405 } 406 407 /** 408 * Return the approximate per-application memory class of the current 409 * device. This gives you an idea of how hard a memory limit you should 410 * impose on your application to let the overall system work best. The 411 * returned value is in megabytes; the baseline Android memory class is 412 * 16 (which happens to be the Java heap limit of those devices); some 413 * device with more memory may return 24 or even higher numbers. 414 */ 415 public int getMemoryClass() { 416 return staticGetMemoryClass(); 417 } 418 419 /** @hide */ 420 static public int staticGetMemoryClass() { 421 // Really brain dead right now -- just take this from the configured 422 // vm heap size, and assume it is in megabytes and thus ends with "m". 423 String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", ""); 424 if (vmHeapSize != null && !"".equals(vmHeapSize)) { 425 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 426 } 427 return staticGetLargeMemoryClass(); 428 } 429 430 /** 431 * Return the approximate per-application memory class of the current 432 * device when an application is running with a large heap. This is the 433 * space available for memory-intensive applications; most applications 434 * should not need this amount of memory, and should instead stay with the 435 * {@link #getMemoryClass()} limit. The returned value is in megabytes. 436 * This may be the same size as {@link #getMemoryClass()} on memory 437 * constrained devices, or it may be significantly larger on devices with 438 * a large amount of available RAM. 439 * 440 * <p>The is the size of the application's Dalvik heap if it has 441 * specified <code>android:largeHeap="true"</code> in its manifest. 442 */ 443 public int getLargeMemoryClass() { 444 return staticGetLargeMemoryClass(); 445 } 446 447 /** @hide */ 448 static public int staticGetLargeMemoryClass() { 449 // Really brain dead right now -- just take this from the configured 450 // vm heap size, and assume it is in megabytes and thus ends with "m". 451 String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m"); 452 return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1)); 453 } 454 455 /** 456 * Returns true if this is a low-RAM device. Exactly whether a device is low-RAM 457 * is ultimately up to the device configuration, but currently it generally means 458 * something in the class of a 512MB device with about a 800x480 or less screen. 459 * This is mostly intended to be used by apps to determine whether they should turn 460 * off certain features that require more RAM. 461 */ 462 public boolean isLowRamDevice() { 463 return isLowRamDeviceStatic(); 464 } 465 466 /** @hide */ 467 public static boolean isLowRamDeviceStatic() { 468 return "true".equals(SystemProperties.get("ro.config.low_ram", "false")); 469 } 470 471 /** 472 * Used by persistent processes to determine if they are running on a 473 * higher-end device so should be okay using hardware drawing acceleration 474 * (which tends to consume a lot more RAM). 475 * @hide 476 */ 477 static public boolean isHighEndGfx() { 478 return !isLowRamDeviceStatic() && 479 !Resources.getSystem().getBoolean(com.android.internal.R.bool.config_avoidGfxAccel); 480 } 481 482 /** 483 * Information you can set and retrieve about the current activity within the recent task list. 484 */ 485 public static class TaskDescription implements Parcelable { 486 private String mLabel; 487 private Bitmap mIcon; 488 private int mColorPrimary; 489 490 /** 491 * Creates the TaskDescription to the specified values. 492 * 493 * @param label A label and description of the current state of this task. 494 * @param icon An icon that represents the current state of this task. 495 * @param colorPrimary A color to override the theme's primary color. This color must be opaque. 496 */ 497 public TaskDescription(String label, Bitmap icon, int colorPrimary) { 498 if ((colorPrimary != 0) && (Color.alpha(colorPrimary) != 255)) { 499 throw new RuntimeException("A TaskDescription's primary color should be opaque"); 500 } 501 502 mLabel = label; 503 mIcon = icon; 504 mColorPrimary = colorPrimary; 505 } 506 507 /** 508 * Creates the TaskDescription to the specified values. 509 * 510 * @param label A label and description of the current state of this activity. 511 * @param icon An icon that represents the current state of this activity. 512 */ 513 public TaskDescription(String label, Bitmap icon) { 514 this(label, icon, 0); 515 } 516 517 /** 518 * Creates the TaskDescription to the specified values. 519 * 520 * @param label A label and description of the current state of this activity. 521 */ 522 public TaskDescription(String label) { 523 this(label, null, 0); 524 } 525 526 /** 527 * Creates an empty TaskDescription. 528 */ 529 public TaskDescription() { 530 this(null, null, 0); 531 } 532 533 /** 534 * Creates a copy of another TaskDescription. 535 */ 536 public TaskDescription(TaskDescription td) { 537 this(td.getLabel(), td.getIcon(), td.getPrimaryColor()); 538 } 539 540 private TaskDescription(Parcel source) { 541 readFromParcel(source); 542 } 543 544 /** 545 * Sets the label for this task description. 546 * @hide 547 */ 548 public void setLabel(String label) { 549 mLabel = label; 550 } 551 552 /** 553 * Sets the primary color for this task description. 554 * @hide 555 */ 556 public void setPrimaryColor(int primaryColor) { 557 mColorPrimary = primaryColor; 558 } 559 560 /** 561 * Sets the icon for this task description. 562 * @hide 563 */ 564 public void setIcon(Bitmap icon) { 565 mIcon = icon; 566 } 567 568 /** 569 * @return The label and description of the current state of this task. 570 */ 571 public String getLabel() { 572 return mLabel; 573 } 574 575 /** 576 * @return The icon that represents the current state of this task. 577 */ 578 public Bitmap getIcon() { 579 return mIcon; 580 } 581 582 /** 583 * @return The color override on the theme's primary color. 584 */ 585 public int getPrimaryColor() { 586 return mColorPrimary; 587 } 588 589 @Override 590 public int describeContents() { 591 return 0; 592 } 593 594 @Override 595 public void writeToParcel(Parcel dest, int flags) { 596 if (mLabel == null) { 597 dest.writeInt(0); 598 } else { 599 dest.writeInt(1); 600 dest.writeString(mLabel); 601 } 602 if (mIcon == null) { 603 dest.writeInt(0); 604 } else { 605 dest.writeInt(1); 606 mIcon.writeToParcel(dest, 0); 607 } 608 dest.writeInt(mColorPrimary); 609 } 610 611 public void readFromParcel(Parcel source) { 612 mLabel = source.readInt() > 0 ? source.readString() : null; 613 mIcon = source.readInt() > 0 ? Bitmap.CREATOR.createFromParcel(source) : null; 614 mColorPrimary = source.readInt(); 615 } 616 617 public static final Creator<TaskDescription> CREATOR 618 = new Creator<TaskDescription>() { 619 public TaskDescription createFromParcel(Parcel source) { 620 return new TaskDescription(source); 621 } 622 public TaskDescription[] newArray(int size) { 623 return new TaskDescription[size]; 624 } 625 }; 626 627 @Override 628 public String toString() { 629 return "TaskDescription Label: " + mLabel + " Icon: " + mIcon + 630 " colorPrimary: " + mColorPrimary; 631 } 632 } 633 634 /** 635 * Information you can retrieve about tasks that the user has most recently 636 * started or visited. 637 */ 638 public static class RecentTaskInfo implements Parcelable { 639 /** 640 * If this task is currently running, this is the identifier for it. 641 * If it is not running, this will be -1. 642 */ 643 public int id; 644 645 /** 646 * The true identifier of this task, valid even if it is not running. 647 */ 648 public int persistentId; 649 650 /** 651 * The original Intent used to launch the task. You can use this 652 * Intent to re-launch the task (if it is no longer running) or bring 653 * the current task to the front. 654 */ 655 public Intent baseIntent; 656 657 /** 658 * If this task was started from an alias, this is the actual 659 * activity component that was initially started; the component of 660 * the baseIntent in this case is the name of the actual activity 661 * implementation that the alias referred to. Otherwise, this is null. 662 */ 663 public ComponentName origActivity; 664 665 /** 666 * Description of the task's last state. 667 */ 668 public CharSequence description; 669 670 /** 671 * The id of the ActivityStack this Task was on most recently. 672 * @hide 673 */ 674 public int stackId; 675 676 /** 677 * The id of the user the task was running as. 678 * @hide 679 */ 680 public int userId; 681 682 /** 683 * The first time this task was active. 684 * @hide 685 */ 686 public long firstActiveTime; 687 688 /** 689 * The last time this task was active. 690 * @hide 691 */ 692 public long lastActiveTime; 693 694 /** 695 * The recent activity values for the highest activity in the stack to have set the values. 696 * {@link Activity#setTaskDescription(android.app.ActivityManager.TaskDescription)}. 697 */ 698 public TaskDescription taskDescription; 699 700 /** 701 * Task affiliation for grouping with other tasks. 702 */ 703 public int affiliatedTaskId; 704 705 /** 706 * Task affiliation color of the source task with the affiliated task id. 707 * 708 * @hide 709 */ 710 public int affiliatedTaskColor; 711 712 public RecentTaskInfo() { 713 } 714 715 @Override 716 public int describeContents() { 717 return 0; 718 } 719 720 @Override 721 public void writeToParcel(Parcel dest, int flags) { 722 dest.writeInt(id); 723 dest.writeInt(persistentId); 724 if (baseIntent != null) { 725 dest.writeInt(1); 726 baseIntent.writeToParcel(dest, 0); 727 } else { 728 dest.writeInt(0); 729 } 730 ComponentName.writeToParcel(origActivity, dest); 731 TextUtils.writeToParcel(description, dest, 732 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 733 if (taskDescription != null) { 734 dest.writeInt(1); 735 taskDescription.writeToParcel(dest, 0); 736 } else { 737 dest.writeInt(0); 738 } 739 dest.writeInt(stackId); 740 dest.writeInt(userId); 741 dest.writeLong(firstActiveTime); 742 dest.writeLong(lastActiveTime); 743 dest.writeInt(affiliatedTaskId); 744 dest.writeInt(affiliatedTaskColor); 745 } 746 747 public void readFromParcel(Parcel source) { 748 id = source.readInt(); 749 persistentId = source.readInt(); 750 baseIntent = source.readInt() > 0 ? Intent.CREATOR.createFromParcel(source) : null; 751 origActivity = ComponentName.readFromParcel(source); 752 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 753 taskDescription = source.readInt() > 0 ? 754 TaskDescription.CREATOR.createFromParcel(source) : null; 755 stackId = source.readInt(); 756 userId = source.readInt(); 757 firstActiveTime = source.readLong(); 758 lastActiveTime = source.readLong(); 759 affiliatedTaskId = source.readInt(); 760 affiliatedTaskColor = source.readInt(); 761 } 762 763 public static final Creator<RecentTaskInfo> CREATOR 764 = new Creator<RecentTaskInfo>() { 765 public RecentTaskInfo createFromParcel(Parcel source) { 766 return new RecentTaskInfo(source); 767 } 768 public RecentTaskInfo[] newArray(int size) { 769 return new RecentTaskInfo[size]; 770 } 771 }; 772 773 private RecentTaskInfo(Parcel source) { 774 readFromParcel(source); 775 } 776 } 777 778 /** 779 * Flag for use with {@link #getRecentTasks}: return all tasks, even those 780 * that have set their 781 * {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag. 782 */ 783 public static final int RECENT_WITH_EXCLUDED = 0x0001; 784 785 /** 786 * Provides a list that does not contain any 787 * recent tasks that currently are not available to the user. 788 */ 789 public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002; 790 791 /** 792 * Provides a list that contains recent tasks for all 793 * profiles of a user. 794 * @hide 795 */ 796 public static final int RECENT_INCLUDE_PROFILES = 0x0004; 797 798 /** 799 * Ignores all tasks that are on the home stack. 800 * @hide 801 */ 802 public static final int RECENT_IGNORE_HOME_STACK_TASKS = 0x0008; 803 804 /** 805 * <p></p>Return a list of the tasks that the user has recently launched, with 806 * the most recent being first and older ones after in order. 807 * 808 * <p><b>Note: this method is only intended for debugging and presenting 809 * task management user interfaces</b>. This should never be used for 810 * core logic in an application, such as deciding between different 811 * behaviors based on the information found here. Such uses are 812 * <em>not</em> supported, and will likely break in the future. For 813 * example, if multiple applications can be actively running at the 814 * same time, assumptions made about the meaning of the data here for 815 * purposes of control flow will be incorrect.</p> 816 * 817 * @deprecated As of {@link android.os.Build.VERSION_CODES#L}, this method is 818 * no longer available to third party applications: as the introduction of 819 * document-centric recents means 820 * it can leak personal information to the caller. For backwards compatibility, 821 * it will still return a small subset of its data: at least the caller's 822 * own tasks (though see {@link #getAppTasks()} for the correct supported 823 * way to retrieve that information), and possibly some other tasks 824 * such as home that are known to not be sensitive. 825 * 826 * @param maxNum The maximum number of entries to return in the list. The 827 * actual number returned may be smaller, depending on how many tasks the 828 * user has started and the maximum number the system can remember. 829 * @param flags Information about what to return. May be any combination 830 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 831 * 832 * @return Returns a list of RecentTaskInfo records describing each of 833 * the recent tasks. 834 * 835 * @throws SecurityException Throws SecurityException if the caller does 836 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 837 */ 838 @Deprecated 839 public List<RecentTaskInfo> getRecentTasks(int maxNum, int flags) 840 throws SecurityException { 841 try { 842 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 843 flags, UserHandle.myUserId()); 844 } catch (RemoteException e) { 845 // System dead, we will be dead too soon! 846 return null; 847 } 848 } 849 850 /** 851 * Same as {@link #getRecentTasks(int, int)} but returns the recent tasks for a 852 * specific user. It requires holding 853 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 854 * @param maxNum The maximum number of entries to return in the list. The 855 * actual number returned may be smaller, depending on how many tasks the 856 * user has started and the maximum number the system can remember. 857 * @param flags Information about what to return. May be any combination 858 * of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}. 859 * 860 * @return Returns a list of RecentTaskInfo records describing each of 861 * the recent tasks. 862 * 863 * @throws SecurityException Throws SecurityException if the caller does 864 * not hold the {@link android.Manifest.permission#GET_TASKS} or the 865 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permissions. 866 * @hide 867 */ 868 public List<RecentTaskInfo> getRecentTasksForUser(int maxNum, int flags, int userId) 869 throws SecurityException { 870 try { 871 return ActivityManagerNative.getDefault().getRecentTasks(maxNum, 872 flags, userId); 873 } catch (RemoteException e) { 874 // System dead, we will be dead too soon! 875 return null; 876 } 877 } 878 879 /** 880 * Information you can retrieve about a particular task that is currently 881 * "running" in the system. Note that a running task does not mean the 882 * given task actually has a process it is actively running in; it simply 883 * means that the user has gone to it and never closed it, but currently 884 * the system may have killed its process and is only holding on to its 885 * last state in order to restart it when the user returns. 886 */ 887 public static class RunningTaskInfo implements Parcelable { 888 /** 889 * A unique identifier for this task. 890 */ 891 public int id; 892 893 /** 894 * The component launched as the first activity in the task. This can 895 * be considered the "application" of this task. 896 */ 897 public ComponentName baseActivity; 898 899 /** 900 * The activity component at the top of the history stack of the task. 901 * This is what the user is currently doing. 902 */ 903 public ComponentName topActivity; 904 905 /** 906 * Thumbnail representation of the task's current state. Currently 907 * always null. 908 */ 909 public Bitmap thumbnail; 910 911 /** 912 * Description of the task's current state. 913 */ 914 public CharSequence description; 915 916 /** 917 * Number of activities in this task. 918 */ 919 public int numActivities; 920 921 /** 922 * Number of activities that are currently running (not stopped 923 * and persisted) in this task. 924 */ 925 public int numRunning; 926 927 /** 928 * Last time task was run. For sorting. 929 * @hide 930 */ 931 public long lastActiveTime; 932 933 public RunningTaskInfo() { 934 } 935 936 public int describeContents() { 937 return 0; 938 } 939 940 public void writeToParcel(Parcel dest, int flags) { 941 dest.writeInt(id); 942 ComponentName.writeToParcel(baseActivity, dest); 943 ComponentName.writeToParcel(topActivity, dest); 944 if (thumbnail != null) { 945 dest.writeInt(1); 946 thumbnail.writeToParcel(dest, 0); 947 } else { 948 dest.writeInt(0); 949 } 950 TextUtils.writeToParcel(description, dest, 951 Parcelable.PARCELABLE_WRITE_RETURN_VALUE); 952 dest.writeInt(numActivities); 953 dest.writeInt(numRunning); 954 } 955 956 public void readFromParcel(Parcel source) { 957 id = source.readInt(); 958 baseActivity = ComponentName.readFromParcel(source); 959 topActivity = ComponentName.readFromParcel(source); 960 if (source.readInt() != 0) { 961 thumbnail = Bitmap.CREATOR.createFromParcel(source); 962 } else { 963 thumbnail = null; 964 } 965 description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source); 966 numActivities = source.readInt(); 967 numRunning = source.readInt(); 968 } 969 970 public static final Creator<RunningTaskInfo> CREATOR = new Creator<RunningTaskInfo>() { 971 public RunningTaskInfo createFromParcel(Parcel source) { 972 return new RunningTaskInfo(source); 973 } 974 public RunningTaskInfo[] newArray(int size) { 975 return new RunningTaskInfo[size]; 976 } 977 }; 978 979 private RunningTaskInfo(Parcel source) { 980 readFromParcel(source); 981 } 982 } 983 984 /** 985 * Get the list of tasks associated with the calling application. 986 * 987 * @return The list of tasks associated with the application making this call. 988 * @throws SecurityException 989 */ 990 public List<ActivityManager.AppTask> getAppTasks() { 991 ArrayList<AppTask> tasks = new ArrayList<AppTask>(); 992 List<IAppTask> appTasks; 993 try { 994 appTasks = ActivityManagerNative.getDefault().getAppTasks(mContext.getPackageName()); 995 } catch (RemoteException e) { 996 // System dead, we will be dead too soon! 997 return null; 998 } 999 int numAppTasks = appTasks.size(); 1000 for (int i = 0; i < numAppTasks; i++) { 1001 tasks.add(new AppTask(appTasks.get(i))); 1002 } 1003 return tasks; 1004 } 1005 1006 /** 1007 * Return the current design width for {@link AppTask} thumbnails, for use 1008 * with {@link #addAppTask}. 1009 */ 1010 public int getAppTaskThumbnailWidth() { 1011 synchronized (this) { 1012 ensureAppTaskThumbnailSizeLocked(); 1013 return mAppTaskThumbnailSize.x; 1014 } 1015 } 1016 1017 /** 1018 * Return the current design height for {@link AppTask} thumbnails, for use 1019 * with {@link #addAppTask}. 1020 */ 1021 public int getAppTaskThumbnailHeight() { 1022 synchronized (this) { 1023 ensureAppTaskThumbnailSizeLocked(); 1024 return mAppTaskThumbnailSize.y; 1025 } 1026 } 1027 1028 private void ensureAppTaskThumbnailSizeLocked() { 1029 if (mAppTaskThumbnailSize == null) { 1030 try { 1031 mAppTaskThumbnailSize = ActivityManagerNative.getDefault().getAppTaskThumbnailSize(); 1032 } catch (RemoteException e) { 1033 throw new IllegalStateException("System dead?", e); 1034 } 1035 } 1036 } 1037 1038 /** 1039 * Add a new {@link AppTask} for the calling application. This will create a new 1040 * recents entry that is added to the <b>end</b> of all existing recents. 1041 * 1042 * @param activity The activity that is adding the entry. This is used to help determine 1043 * the context that the new recents entry will be in. 1044 * @param intent The Intent that describes the recents entry. This is the same Intent that 1045 * you would have used to launch the activity for it. In generally you will want to set 1046 * both {@link Intent#FLAG_ACTIVITY_NEW_DOCUMENT} and 1047 * {@link Intent#FLAG_ACTIVITY_RETAIN_IN_RECENTS}; the latter is required since this recents 1048 * entry will exist without an activity, so it doesn't make sense to not retain it when 1049 * its activity disappears. The given Intent here also must have an explicit ComponentName 1050 * set on it. 1051 * @param description Optional additional description information. 1052 * @param thumbnail Thumbnail to use for the recents entry. Should be the size given by 1053 * {@link #getAppTaskThumbnailWidth()} and {@link #getAppTaskThumbnailHeight()}. If the 1054 * bitmap is not that exact size, it will be recreated in your process, probably in a way 1055 * you don't like, before the recents entry is added. 1056 * 1057 * @return Returns the task id of the newly added app task, or -1 if the add failed. The 1058 * most likely cause of failure is that there is no more room for more tasks for your app. 1059 */ 1060 public int addAppTask(@NonNull Activity activity, @NonNull Intent intent, 1061 @Nullable TaskDescription description, @NonNull Bitmap thumbnail) { 1062 Point size; 1063 synchronized (this) { 1064 ensureAppTaskThumbnailSizeLocked(); 1065 size = mAppTaskThumbnailSize; 1066 } 1067 final int tw = thumbnail.getWidth(); 1068 final int th = thumbnail.getHeight(); 1069 if (tw != size.x || th != size.y) { 1070 Bitmap bm = Bitmap.createBitmap(size.x, size.y, thumbnail.getConfig()); 1071 1072 // Use ScaleType.CENTER_CROP, except we leave the top edge at the top. 1073 float scale; 1074 float dx = 0, dy = 0; 1075 if (tw * size.x > size.y * th) { 1076 scale = (float) size.x / (float) th; 1077 dx = (size.y - tw * scale) * 0.5f; 1078 } else { 1079 scale = (float) size.y / (float) tw; 1080 dy = (size.x - th * scale) * 0.5f; 1081 } 1082 Matrix matrix = new Matrix(); 1083 matrix.setScale(scale, scale); 1084 matrix.postTranslate((int) (dx + 0.5f), 0); 1085 1086 Canvas canvas = new Canvas(bm); 1087 canvas.drawBitmap(thumbnail, matrix, null); 1088 canvas.setBitmap(null); 1089 1090 thumbnail = bm; 1091 } 1092 if (description == null) { 1093 description = new TaskDescription(); 1094 } 1095 try { 1096 return ActivityManagerNative.getDefault().addAppTask(activity.getActivityToken(), 1097 intent, description, thumbnail); 1098 } catch (RemoteException e) { 1099 throw new IllegalStateException("System dead?", e); 1100 } 1101 } 1102 1103 /** 1104 * Return a list of the tasks that are currently running, with 1105 * the most recent being first and older ones after in order. Note that 1106 * "running" does not mean any of the task's code is currently loaded or 1107 * activity -- the task may have been frozen by the system, so that it 1108 * can be restarted in its previous state when next brought to the 1109 * foreground. 1110 * 1111 * <p><b>Note: this method is only intended for debugging and presenting 1112 * task management user interfaces</b>. This should never be used for 1113 * core logic in an application, such as deciding between different 1114 * behaviors based on the information found here. Such uses are 1115 * <em>not</em> supported, and will likely break in the future. For 1116 * example, if multiple applications can be actively running at the 1117 * same time, assumptions made about the meaning of the data here for 1118 * purposes of control flow will be incorrect.</p> 1119 * 1120 * @deprecated As of {@link android.os.Build.VERSION_CODES#L}, this method 1121 * is no longer available to third party 1122 * applications: the introduction of document-centric recents means 1123 * it can leak person information to the caller. For backwards compatibility, 1124 * it will still retu rn a small subset of its data: at least the caller's 1125 * own tasks, and possibly some other tasks 1126 * such as home that are known to not be sensitive. 1127 * 1128 * @param maxNum The maximum number of entries to return in the list. The 1129 * actual number returned may be smaller, depending on how many tasks the 1130 * user has started. 1131 * 1132 * @return Returns a list of RunningTaskInfo records describing each of 1133 * the running tasks. 1134 * 1135 * @throws SecurityException Throws SecurityException if the caller does 1136 * not hold the {@link android.Manifest.permission#GET_TASKS} permission. 1137 */ 1138 @Deprecated 1139 public List<RunningTaskInfo> getRunningTasks(int maxNum) 1140 throws SecurityException { 1141 try { 1142 return ActivityManagerNative.getDefault().getTasks(maxNum, 0); 1143 } catch (RemoteException e) { 1144 // System dead, we will be dead too soon! 1145 return null; 1146 } 1147 } 1148 1149 /** 1150 * If set, the process of the root activity of the task will be killed 1151 * as part of removing the task. 1152 * @hide 1153 */ 1154 public static final int REMOVE_TASK_KILL_PROCESS = 0x0001; 1155 1156 /** 1157 * Completely remove the given task. 1158 * 1159 * @param taskId Identifier of the task to be removed. 1160 * @param flags Additional operational flags. May be 0 or 1161 * {@link #REMOVE_TASK_KILL_PROCESS}. 1162 * @return Returns true if the given task was found and removed. 1163 * 1164 * @hide 1165 */ 1166 public boolean removeTask(int taskId, int flags) 1167 throws SecurityException { 1168 try { 1169 return ActivityManagerNative.getDefault().removeTask(taskId, flags); 1170 } catch (RemoteException e) { 1171 // System dead, we will be dead too soon! 1172 return false; 1173 } 1174 } 1175 1176 /** @hide */ 1177 public static class TaskThumbnail implements Parcelable { 1178 public Bitmap mainThumbnail; 1179 public ParcelFileDescriptor thumbnailFileDescriptor; 1180 1181 public TaskThumbnail() { 1182 } 1183 1184 public int describeContents() { 1185 if (thumbnailFileDescriptor != null) { 1186 return thumbnailFileDescriptor.describeContents(); 1187 } 1188 return 0; 1189 } 1190 1191 public void writeToParcel(Parcel dest, int flags) { 1192 if (mainThumbnail != null) { 1193 dest.writeInt(1); 1194 mainThumbnail.writeToParcel(dest, 0); 1195 } else { 1196 dest.writeInt(0); 1197 } 1198 if (thumbnailFileDescriptor != null) { 1199 dest.writeInt(1); 1200 thumbnailFileDescriptor.writeToParcel(dest, 0); 1201 } else { 1202 dest.writeInt(0); 1203 } 1204 } 1205 1206 public void readFromParcel(Parcel source) { 1207 if (source.readInt() != 0) { 1208 mainThumbnail = Bitmap.CREATOR.createFromParcel(source); 1209 } else { 1210 mainThumbnail = null; 1211 } 1212 if (source.readInt() != 0) { 1213 thumbnailFileDescriptor = ParcelFileDescriptor.CREATOR.createFromParcel(source); 1214 } else { 1215 thumbnailFileDescriptor = null; 1216 } 1217 } 1218 1219 public static final Creator<TaskThumbnail> CREATOR = new Creator<TaskThumbnail>() { 1220 public TaskThumbnail createFromParcel(Parcel source) { 1221 return new TaskThumbnail(source); 1222 } 1223 public TaskThumbnail[] newArray(int size) { 1224 return new TaskThumbnail[size]; 1225 } 1226 }; 1227 1228 private TaskThumbnail(Parcel source) { 1229 readFromParcel(source); 1230 } 1231 } 1232 1233 /** @hide */ 1234 public TaskThumbnail getTaskThumbnail(int id) throws SecurityException { 1235 try { 1236 return ActivityManagerNative.getDefault().getTaskThumbnail(id); 1237 } catch (RemoteException e) { 1238 // System dead, we will be dead too soon! 1239 return null; 1240 } 1241 } 1242 1243 /** @hide */ 1244 public boolean isInHomeStack(int taskId) { 1245 try { 1246 return ActivityManagerNative.getDefault().isInHomeStack(taskId); 1247 } catch (RemoteException e) { 1248 // System dead, we will be dead too soon! 1249 return false; 1250 } 1251 } 1252 1253 /** 1254 * Flag for {@link #moveTaskToFront(int, int)}: also move the "home" 1255 * activity along with the task, so it is positioned immediately behind 1256 * the task. 1257 */ 1258 public static final int MOVE_TASK_WITH_HOME = 0x00000001; 1259 1260 /** 1261 * Flag for {@link #moveTaskToFront(int, int)}: don't count this as a 1262 * user-instigated action, so the current activity will not receive a 1263 * hint that the user is leaving. 1264 */ 1265 public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002; 1266 1267 /** 1268 * Equivalent to calling {@link #moveTaskToFront(int, int, Bundle)} 1269 * with a null options argument. 1270 * 1271 * @param taskId The identifier of the task to be moved, as found in 1272 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1273 * @param flags Additional operational flags, 0 or more of 1274 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1275 */ 1276 public void moveTaskToFront(int taskId, int flags) { 1277 moveTaskToFront(taskId, flags, null); 1278 } 1279 1280 /** 1281 * Ask that the task associated with a given task ID be moved to the 1282 * front of the stack, so it is now visible to the user. Requires that 1283 * the caller hold permission {@link android.Manifest.permission#REORDER_TASKS} 1284 * or a SecurityException will be thrown. 1285 * 1286 * @param taskId The identifier of the task to be moved, as found in 1287 * {@link RunningTaskInfo} or {@link RecentTaskInfo}. 1288 * @param flags Additional operational flags, 0 or more of 1289 * {@link #MOVE_TASK_WITH_HOME}, {@link #MOVE_TASK_NO_USER_ACTION}. 1290 * @param options Additional options for the operation, either null or 1291 * as per {@link Context#startActivity(Intent, android.os.Bundle) 1292 * Context.startActivity(Intent, Bundle)}. 1293 */ 1294 public void moveTaskToFront(int taskId, int flags, Bundle options) { 1295 try { 1296 ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags, options); 1297 } catch (RemoteException e) { 1298 // System dead, we will be dead too soon! 1299 } 1300 } 1301 1302 /** 1303 * Information you can retrieve about a particular Service that is 1304 * currently running in the system. 1305 */ 1306 public static class RunningServiceInfo implements Parcelable { 1307 /** 1308 * The service component. 1309 */ 1310 public ComponentName service; 1311 1312 /** 1313 * If non-zero, this is the process the service is running in. 1314 */ 1315 public int pid; 1316 1317 /** 1318 * The UID that owns this service. 1319 */ 1320 public int uid; 1321 1322 /** 1323 * The name of the process this service runs in. 1324 */ 1325 public String process; 1326 1327 /** 1328 * Set to true if the service has asked to run as a foreground process. 1329 */ 1330 public boolean foreground; 1331 1332 /** 1333 * The time when the service was first made active, either by someone 1334 * starting or binding to it. This 1335 * is in units of {@link android.os.SystemClock#elapsedRealtime()}. 1336 */ 1337 public long activeSince; 1338 1339 /** 1340 * Set to true if this service has been explicitly started. 1341 */ 1342 public boolean started; 1343 1344 /** 1345 * Number of clients connected to the service. 1346 */ 1347 public int clientCount; 1348 1349 /** 1350 * Number of times the service's process has crashed while the service 1351 * is running. 1352 */ 1353 public int crashCount; 1354 1355 /** 1356 * The time when there was last activity in the service (either 1357 * explicit requests to start it or clients binding to it). This 1358 * is in units of {@link android.os.SystemClock#uptimeMillis()}. 1359 */ 1360 public long lastActivityTime; 1361 1362 /** 1363 * If non-zero, this service is not currently running, but scheduled to 1364 * restart at the given time. 1365 */ 1366 public long restarting; 1367 1368 /** 1369 * Bit for {@link #flags}: set if this service has been 1370 * explicitly started. 1371 */ 1372 public static final int FLAG_STARTED = 1<<0; 1373 1374 /** 1375 * Bit for {@link #flags}: set if the service has asked to 1376 * run as a foreground process. 1377 */ 1378 public static final int FLAG_FOREGROUND = 1<<1; 1379 1380 /** 1381 * Bit for {@link #flags): set if the service is running in a 1382 * core system process. 1383 */ 1384 public static final int FLAG_SYSTEM_PROCESS = 1<<2; 1385 1386 /** 1387 * Bit for {@link #flags): set if the service is running in a 1388 * persistent process. 1389 */ 1390 public static final int FLAG_PERSISTENT_PROCESS = 1<<3; 1391 1392 /** 1393 * Running flags. 1394 */ 1395 public int flags; 1396 1397 /** 1398 * For special services that are bound to by system code, this is 1399 * the package that holds the binding. 1400 */ 1401 public String clientPackage; 1402 1403 /** 1404 * For special services that are bound to by system code, this is 1405 * a string resource providing a user-visible label for who the 1406 * client is. 1407 */ 1408 public int clientLabel; 1409 1410 public RunningServiceInfo() { 1411 } 1412 1413 public int describeContents() { 1414 return 0; 1415 } 1416 1417 public void writeToParcel(Parcel dest, int flags) { 1418 ComponentName.writeToParcel(service, dest); 1419 dest.writeInt(pid); 1420 dest.writeInt(uid); 1421 dest.writeString(process); 1422 dest.writeInt(foreground ? 1 : 0); 1423 dest.writeLong(activeSince); 1424 dest.writeInt(started ? 1 : 0); 1425 dest.writeInt(clientCount); 1426 dest.writeInt(crashCount); 1427 dest.writeLong(lastActivityTime); 1428 dest.writeLong(restarting); 1429 dest.writeInt(this.flags); 1430 dest.writeString(clientPackage); 1431 dest.writeInt(clientLabel); 1432 } 1433 1434 public void readFromParcel(Parcel source) { 1435 service = ComponentName.readFromParcel(source); 1436 pid = source.readInt(); 1437 uid = source.readInt(); 1438 process = source.readString(); 1439 foreground = source.readInt() != 0; 1440 activeSince = source.readLong(); 1441 started = source.readInt() != 0; 1442 clientCount = source.readInt(); 1443 crashCount = source.readInt(); 1444 lastActivityTime = source.readLong(); 1445 restarting = source.readLong(); 1446 flags = source.readInt(); 1447 clientPackage = source.readString(); 1448 clientLabel = source.readInt(); 1449 } 1450 1451 public static final Creator<RunningServiceInfo> CREATOR = new Creator<RunningServiceInfo>() { 1452 public RunningServiceInfo createFromParcel(Parcel source) { 1453 return new RunningServiceInfo(source); 1454 } 1455 public RunningServiceInfo[] newArray(int size) { 1456 return new RunningServiceInfo[size]; 1457 } 1458 }; 1459 1460 private RunningServiceInfo(Parcel source) { 1461 readFromParcel(source); 1462 } 1463 } 1464 1465 /** 1466 * Return a list of the services that are currently running. 1467 * 1468 * <p><b>Note: this method is only intended for debugging or implementing 1469 * service management type user interfaces.</b></p> 1470 * 1471 * @param maxNum The maximum number of entries to return in the list. The 1472 * actual number returned may be smaller, depending on how many services 1473 * are running. 1474 * 1475 * @return Returns a list of RunningServiceInfo records describing each of 1476 * the running tasks. 1477 */ 1478 public List<RunningServiceInfo> getRunningServices(int maxNum) 1479 throws SecurityException { 1480 try { 1481 return ActivityManagerNative.getDefault() 1482 .getServices(maxNum, 0); 1483 } catch (RemoteException e) { 1484 // System dead, we will be dead too soon! 1485 return null; 1486 } 1487 } 1488 1489 /** 1490 * Returns a PendingIntent you can start to show a control panel for the 1491 * given running service. If the service does not have a control panel, 1492 * null is returned. 1493 */ 1494 public PendingIntent getRunningServiceControlPanel(ComponentName service) 1495 throws SecurityException { 1496 try { 1497 return ActivityManagerNative.getDefault() 1498 .getRunningServiceControlPanel(service); 1499 } catch (RemoteException e) { 1500 // System dead, we will be dead too soon! 1501 return null; 1502 } 1503 } 1504 1505 /** 1506 * Information you can retrieve about the available memory through 1507 * {@link ActivityManager#getMemoryInfo}. 1508 */ 1509 public static class MemoryInfo implements Parcelable { 1510 /** 1511 * The available memory on the system. This number should not 1512 * be considered absolute: due to the nature of the kernel, a significant 1513 * portion of this memory is actually in use and needed for the overall 1514 * system to run well. 1515 */ 1516 public long availMem; 1517 1518 /** 1519 * The total memory accessible by the kernel. This is basically the 1520 * RAM size of the device, not including below-kernel fixed allocations 1521 * like DMA buffers, RAM for the baseband CPU, etc. 1522 */ 1523 public long totalMem; 1524 1525 /** 1526 * The threshold of {@link #availMem} at which we consider memory to be 1527 * low and start killing background services and other non-extraneous 1528 * processes. 1529 */ 1530 public long threshold; 1531 1532 /** 1533 * Set to true if the system considers itself to currently be in a low 1534 * memory situation. 1535 */ 1536 public boolean lowMemory; 1537 1538 /** @hide */ 1539 public long hiddenAppThreshold; 1540 /** @hide */ 1541 public long secondaryServerThreshold; 1542 /** @hide */ 1543 public long visibleAppThreshold; 1544 /** @hide */ 1545 public long foregroundAppThreshold; 1546 1547 public MemoryInfo() { 1548 } 1549 1550 public int describeContents() { 1551 return 0; 1552 } 1553 1554 public void writeToParcel(Parcel dest, int flags) { 1555 dest.writeLong(availMem); 1556 dest.writeLong(totalMem); 1557 dest.writeLong(threshold); 1558 dest.writeInt(lowMemory ? 1 : 0); 1559 dest.writeLong(hiddenAppThreshold); 1560 dest.writeLong(secondaryServerThreshold); 1561 dest.writeLong(visibleAppThreshold); 1562 dest.writeLong(foregroundAppThreshold); 1563 } 1564 1565 public void readFromParcel(Parcel source) { 1566 availMem = source.readLong(); 1567 totalMem = source.readLong(); 1568 threshold = source.readLong(); 1569 lowMemory = source.readInt() != 0; 1570 hiddenAppThreshold = source.readLong(); 1571 secondaryServerThreshold = source.readLong(); 1572 visibleAppThreshold = source.readLong(); 1573 foregroundAppThreshold = source.readLong(); 1574 } 1575 1576 public static final Creator<MemoryInfo> CREATOR 1577 = new Creator<MemoryInfo>() { 1578 public MemoryInfo createFromParcel(Parcel source) { 1579 return new MemoryInfo(source); 1580 } 1581 public MemoryInfo[] newArray(int size) { 1582 return new MemoryInfo[size]; 1583 } 1584 }; 1585 1586 private MemoryInfo(Parcel source) { 1587 readFromParcel(source); 1588 } 1589 } 1590 1591 /** 1592 * Return general information about the memory state of the system. This 1593 * can be used to help decide how to manage your own memory, though note 1594 * that polling is not recommended and 1595 * {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1596 * ComponentCallbacks2.onTrimMemory(int)} is the preferred way to do this. 1597 * Also see {@link #getMyMemoryState} for how to retrieve the current trim 1598 * level of your process as needed, which gives a better hint for how to 1599 * manage its memory. 1600 */ 1601 public void getMemoryInfo(MemoryInfo outInfo) { 1602 try { 1603 ActivityManagerNative.getDefault().getMemoryInfo(outInfo); 1604 } catch (RemoteException e) { 1605 } 1606 } 1607 1608 /** 1609 * Information you can retrieve about an ActivityStack in the system. 1610 * @hide 1611 */ 1612 public static class StackInfo implements Parcelable { 1613 public int stackId; 1614 public Rect bounds = new Rect(); 1615 public int[] taskIds; 1616 public String[] taskNames; 1617 public int displayId; 1618 1619 @Override 1620 public int describeContents() { 1621 return 0; 1622 } 1623 1624 @Override 1625 public void writeToParcel(Parcel dest, int flags) { 1626 dest.writeInt(stackId); 1627 dest.writeInt(bounds.left); 1628 dest.writeInt(bounds.top); 1629 dest.writeInt(bounds.right); 1630 dest.writeInt(bounds.bottom); 1631 dest.writeIntArray(taskIds); 1632 dest.writeStringArray(taskNames); 1633 dest.writeInt(displayId); 1634 } 1635 1636 public void readFromParcel(Parcel source) { 1637 stackId = source.readInt(); 1638 bounds = new Rect( 1639 source.readInt(), source.readInt(), source.readInt(), source.readInt()); 1640 taskIds = source.createIntArray(); 1641 taskNames = source.createStringArray(); 1642 displayId = source.readInt(); 1643 } 1644 1645 public static final Creator<StackInfo> CREATOR = new Creator<StackInfo>() { 1646 @Override 1647 public StackInfo createFromParcel(Parcel source) { 1648 return new StackInfo(source); 1649 } 1650 @Override 1651 public StackInfo[] newArray(int size) { 1652 return new StackInfo[size]; 1653 } 1654 }; 1655 1656 public StackInfo() { 1657 } 1658 1659 private StackInfo(Parcel source) { 1660 readFromParcel(source); 1661 } 1662 1663 public String toString(String prefix) { 1664 StringBuilder sb = new StringBuilder(256); 1665 sb.append(prefix); sb.append("Stack id="); sb.append(stackId); 1666 sb.append(" bounds="); sb.append(bounds.toShortString()); 1667 sb.append(" displayId="); sb.append(displayId); 1668 sb.append("\n"); 1669 prefix = prefix + " "; 1670 for (int i = 0; i < taskIds.length; ++i) { 1671 sb.append(prefix); sb.append("taskId="); sb.append(taskIds[i]); 1672 sb.append(": "); sb.append(taskNames[i]); sb.append("\n"); 1673 } 1674 return sb.toString(); 1675 } 1676 1677 @Override 1678 public String toString() { 1679 return toString(""); 1680 } 1681 } 1682 1683 /** 1684 * @hide 1685 */ 1686 public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) { 1687 try { 1688 return ActivityManagerNative.getDefault().clearApplicationUserData(packageName, 1689 observer, UserHandle.myUserId()); 1690 } catch (RemoteException e) { 1691 return false; 1692 } 1693 } 1694 1695 /** 1696 * Permits an application to erase its own data from disk. This is equivalent to 1697 * the user choosing to clear the app's data from within the device settings UI. It 1698 * erases all dynamic data associated with the app -- its private data and data in its 1699 * private area on external storage -- but does not remove the installed application 1700 * itself, nor any OBB files. 1701 * 1702 * @return {@code true} if the application successfully requested that the application's 1703 * data be erased; {@code false} otherwise. 1704 */ 1705 public boolean clearApplicationUserData() { 1706 return clearApplicationUserData(mContext.getPackageName(), null); 1707 } 1708 1709 /** 1710 * Information you can retrieve about any processes that are in an error condition. 1711 */ 1712 public static class ProcessErrorStateInfo implements Parcelable { 1713 /** 1714 * Condition codes 1715 */ 1716 public static final int NO_ERROR = 0; 1717 public static final int CRASHED = 1; 1718 public static final int NOT_RESPONDING = 2; 1719 1720 /** 1721 * The condition that the process is in. 1722 */ 1723 public int condition; 1724 1725 /** 1726 * The process name in which the crash or error occurred. 1727 */ 1728 public String processName; 1729 1730 /** 1731 * The pid of this process; 0 if none 1732 */ 1733 public int pid; 1734 1735 /** 1736 * The kernel user-ID that has been assigned to this process; 1737 * currently this is not a unique ID (multiple applications can have 1738 * the same uid). 1739 */ 1740 public int uid; 1741 1742 /** 1743 * The activity name associated with the error, if known. May be null. 1744 */ 1745 public String tag; 1746 1747 /** 1748 * A short message describing the error condition. 1749 */ 1750 public String shortMsg; 1751 1752 /** 1753 * A long message describing the error condition. 1754 */ 1755 public String longMsg; 1756 1757 /** 1758 * The stack trace where the error originated. May be null. 1759 */ 1760 public String stackTrace; 1761 1762 /** 1763 * to be deprecated: This value will always be null. 1764 */ 1765 public byte[] crashData = null; 1766 1767 public ProcessErrorStateInfo() { 1768 } 1769 1770 @Override 1771 public int describeContents() { 1772 return 0; 1773 } 1774 1775 @Override 1776 public void writeToParcel(Parcel dest, int flags) { 1777 dest.writeInt(condition); 1778 dest.writeString(processName); 1779 dest.writeInt(pid); 1780 dest.writeInt(uid); 1781 dest.writeString(tag); 1782 dest.writeString(shortMsg); 1783 dest.writeString(longMsg); 1784 dest.writeString(stackTrace); 1785 } 1786 1787 public void readFromParcel(Parcel source) { 1788 condition = source.readInt(); 1789 processName = source.readString(); 1790 pid = source.readInt(); 1791 uid = source.readInt(); 1792 tag = source.readString(); 1793 shortMsg = source.readString(); 1794 longMsg = source.readString(); 1795 stackTrace = source.readString(); 1796 } 1797 1798 public static final Creator<ProcessErrorStateInfo> CREATOR = 1799 new Creator<ProcessErrorStateInfo>() { 1800 public ProcessErrorStateInfo createFromParcel(Parcel source) { 1801 return new ProcessErrorStateInfo(source); 1802 } 1803 public ProcessErrorStateInfo[] newArray(int size) { 1804 return new ProcessErrorStateInfo[size]; 1805 } 1806 }; 1807 1808 private ProcessErrorStateInfo(Parcel source) { 1809 readFromParcel(source); 1810 } 1811 } 1812 1813 /** 1814 * Returns a list of any processes that are currently in an error condition. The result 1815 * will be null if all processes are running properly at this time. 1816 * 1817 * @return Returns a list of ProcessErrorStateInfo records, or null if there are no 1818 * current error conditions (it will not return an empty list). This list ordering is not 1819 * specified. 1820 */ 1821 public List<ProcessErrorStateInfo> getProcessesInErrorState() { 1822 try { 1823 return ActivityManagerNative.getDefault().getProcessesInErrorState(); 1824 } catch (RemoteException e) { 1825 return null; 1826 } 1827 } 1828 1829 /** 1830 * Information you can retrieve about a running process. 1831 */ 1832 public static class RunningAppProcessInfo implements Parcelable { 1833 /** 1834 * The name of the process that this object is associated with 1835 */ 1836 public String processName; 1837 1838 /** 1839 * The pid of this process; 0 if none 1840 */ 1841 public int pid; 1842 1843 /** 1844 * The user id of this process. 1845 */ 1846 public int uid; 1847 1848 /** 1849 * All packages that have been loaded into the process. 1850 */ 1851 public String pkgList[]; 1852 1853 /** 1854 * Constant for {@link #flags}: this is an app that is unable to 1855 * correctly save its state when going to the background, 1856 * so it can not be killed while in the background. 1857 * @hide 1858 */ 1859 public static final int FLAG_CANT_SAVE_STATE = 1<<0; 1860 1861 /** 1862 * Constant for {@link #flags}: this process is associated with a 1863 * persistent system app. 1864 * @hide 1865 */ 1866 public static final int FLAG_PERSISTENT = 1<<1; 1867 1868 /** 1869 * Constant for {@link #flags}: this process is associated with a 1870 * persistent system app. 1871 * @hide 1872 */ 1873 public static final int FLAG_HAS_ACTIVITIES = 1<<2; 1874 1875 /** 1876 * Flags of information. May be any of 1877 * {@link #FLAG_CANT_SAVE_STATE}. 1878 * @hide 1879 */ 1880 public int flags; 1881 1882 /** 1883 * Last memory trim level reported to the process: corresponds to 1884 * the values supplied to {@link android.content.ComponentCallbacks2#onTrimMemory(int) 1885 * ComponentCallbacks2.onTrimMemory(int)}. 1886 */ 1887 public int lastTrimLevel; 1888 1889 /** 1890 * Constant for {@link #importance}: this process is running the 1891 * foreground UI. 1892 */ 1893 public static final int IMPORTANCE_FOREGROUND = 100; 1894 1895 /** 1896 * Constant for {@link #importance}: this process is running something 1897 * that is actively visible to the user, though not in the immediate 1898 * foreground. 1899 */ 1900 public static final int IMPORTANCE_VISIBLE = 200; 1901 1902 /** 1903 * Constant for {@link #importance}: this process is running something 1904 * that is considered to be actively perceptible to the user. An 1905 * example would be an application performing background music playback. 1906 */ 1907 public static final int IMPORTANCE_PERCEPTIBLE = 130; 1908 1909 /** 1910 * Constant for {@link #importance}: this process is running an 1911 * application that can not save its state, and thus can't be killed 1912 * while in the background. 1913 * @hide 1914 */ 1915 public static final int IMPORTANCE_CANT_SAVE_STATE = 170; 1916 1917 /** 1918 * Constant for {@link #importance}: this process is contains services 1919 * that should remain running. 1920 */ 1921 public static final int IMPORTANCE_SERVICE = 300; 1922 1923 /** 1924 * Constant for {@link #importance}: this process process contains 1925 * background code that is expendable. 1926 */ 1927 public static final int IMPORTANCE_BACKGROUND = 400; 1928 1929 /** 1930 * Constant for {@link #importance}: this process is empty of any 1931 * actively running code. 1932 */ 1933 public static final int IMPORTANCE_EMPTY = 500; 1934 1935 /** 1936 * Constant for {@link #importance}: this process does not exist. 1937 */ 1938 public static final int IMPORTANCE_GONE = 1000; 1939 1940 /** @hide */ 1941 public static int procStateToImportance(int procState) { 1942 if (procState >= ActivityManager.PROCESS_STATE_HOME) { 1943 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND; 1944 } else if (procState >= ActivityManager.PROCESS_STATE_SERVICE) { 1945 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_SERVICE; 1946 } else if (procState > ActivityManager.PROCESS_STATE_HEAVY_WEIGHT) { 1947 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_CANT_SAVE_STATE; 1948 } else if (procState >= ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND) { 1949 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_PERCEPTIBLE; 1950 } else if (procState >= ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND) { 1951 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE; 1952 } else { 1953 return ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND; 1954 } 1955 } 1956 1957 /** 1958 * The relative importance level that the system places on this 1959 * process. May be one of {@link #IMPORTANCE_FOREGROUND}, 1960 * {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE}, 1961 * {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These 1962 * constants are numbered so that "more important" values are always 1963 * smaller than "less important" values. 1964 */ 1965 public int importance; 1966 1967 /** 1968 * An additional ordering within a particular {@link #importance} 1969 * category, providing finer-grained information about the relative 1970 * utility of processes within a category. This number means nothing 1971 * except that a smaller values are more recently used (and thus 1972 * more important). Currently an LRU value is only maintained for 1973 * the {@link #IMPORTANCE_BACKGROUND} category, though others may 1974 * be maintained in the future. 1975 */ 1976 public int lru; 1977 1978 /** 1979 * Constant for {@link #importanceReasonCode}: nothing special has 1980 * been specified for the reason for this level. 1981 */ 1982 public static final int REASON_UNKNOWN = 0; 1983 1984 /** 1985 * Constant for {@link #importanceReasonCode}: one of the application's 1986 * content providers is being used by another process. The pid of 1987 * the client process is in {@link #importanceReasonPid} and the 1988 * target provider in this process is in 1989 * {@link #importanceReasonComponent}. 1990 */ 1991 public static final int REASON_PROVIDER_IN_USE = 1; 1992 1993 /** 1994 * Constant for {@link #importanceReasonCode}: one of the application's 1995 * content providers is being used by another process. The pid of 1996 * the client process is in {@link #importanceReasonPid} and the 1997 * target provider in this process is in 1998 * {@link #importanceReasonComponent}. 1999 */ 2000 public static final int REASON_SERVICE_IN_USE = 2; 2001 2002 /** 2003 * The reason for {@link #importance}, if any. 2004 */ 2005 public int importanceReasonCode; 2006 2007 /** 2008 * For the specified values of {@link #importanceReasonCode}, this 2009 * is the process ID of the other process that is a client of this 2010 * process. This will be 0 if no other process is using this one. 2011 */ 2012 public int importanceReasonPid; 2013 2014 /** 2015 * For the specified values of {@link #importanceReasonCode}, this 2016 * is the name of the component that is being used in this process. 2017 */ 2018 public ComponentName importanceReasonComponent; 2019 2020 /** 2021 * When {@link #importanceReasonPid} is non-0, this is the importance 2022 * of the other pid. @hide 2023 */ 2024 public int importanceReasonImportance; 2025 2026 /** 2027 * Current process state, as per PROCESS_STATE_* constants. 2028 * @hide 2029 */ 2030 public int processState; 2031 2032 public RunningAppProcessInfo() { 2033 importance = IMPORTANCE_FOREGROUND; 2034 importanceReasonCode = REASON_UNKNOWN; 2035 processState = PROCESS_STATE_IMPORTANT_FOREGROUND; 2036 } 2037 2038 public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) { 2039 processName = pProcessName; 2040 pid = pPid; 2041 pkgList = pArr; 2042 } 2043 2044 public int describeContents() { 2045 return 0; 2046 } 2047 2048 public void writeToParcel(Parcel dest, int flags) { 2049 dest.writeString(processName); 2050 dest.writeInt(pid); 2051 dest.writeInt(uid); 2052 dest.writeStringArray(pkgList); 2053 dest.writeInt(this.flags); 2054 dest.writeInt(lastTrimLevel); 2055 dest.writeInt(importance); 2056 dest.writeInt(lru); 2057 dest.writeInt(importanceReasonCode); 2058 dest.writeInt(importanceReasonPid); 2059 ComponentName.writeToParcel(importanceReasonComponent, dest); 2060 dest.writeInt(importanceReasonImportance); 2061 dest.writeInt(processState); 2062 } 2063 2064 public void readFromParcel(Parcel source) { 2065 processName = source.readString(); 2066 pid = source.readInt(); 2067 uid = source.readInt(); 2068 pkgList = source.readStringArray(); 2069 flags = source.readInt(); 2070 lastTrimLevel = source.readInt(); 2071 importance = source.readInt(); 2072 lru = source.readInt(); 2073 importanceReasonCode = source.readInt(); 2074 importanceReasonPid = source.readInt(); 2075 importanceReasonComponent = ComponentName.readFromParcel(source); 2076 importanceReasonImportance = source.readInt(); 2077 processState = source.readInt(); 2078 } 2079 2080 public static final Creator<RunningAppProcessInfo> CREATOR = 2081 new Creator<RunningAppProcessInfo>() { 2082 public RunningAppProcessInfo createFromParcel(Parcel source) { 2083 return new RunningAppProcessInfo(source); 2084 } 2085 public RunningAppProcessInfo[] newArray(int size) { 2086 return new RunningAppProcessInfo[size]; 2087 } 2088 }; 2089 2090 private RunningAppProcessInfo(Parcel source) { 2091 readFromParcel(source); 2092 } 2093 } 2094 2095 /** 2096 * Returns a list of application processes installed on external media 2097 * that are running on the device. 2098 * 2099 * <p><b>Note: this method is only intended for debugging or building 2100 * a user-facing process management UI.</b></p> 2101 * 2102 * @return Returns a list of ApplicationInfo records, or null if none 2103 * This list ordering is not specified. 2104 * @hide 2105 */ 2106 public List<ApplicationInfo> getRunningExternalApplications() { 2107 try { 2108 return ActivityManagerNative.getDefault().getRunningExternalApplications(); 2109 } catch (RemoteException e) { 2110 return null; 2111 } 2112 } 2113 2114 /** 2115 * Returns a list of application processes that are running on the device. 2116 * 2117 * <p><b>Note: this method is only intended for debugging or building 2118 * a user-facing process management UI.</b></p> 2119 * 2120 * @return Returns a list of RunningAppProcessInfo records, or null if there are no 2121 * running processes (it will not return an empty list). This list ordering is not 2122 * specified. 2123 */ 2124 public List<RunningAppProcessInfo> getRunningAppProcesses() { 2125 try { 2126 return ActivityManagerNative.getDefault().getRunningAppProcesses(); 2127 } catch (RemoteException e) { 2128 return null; 2129 } 2130 } 2131 2132 /** 2133 * Return global memory state information for the calling process. This 2134 * does not fill in all fields of the {@link RunningAppProcessInfo}. The 2135 * only fields that will be filled in are 2136 * {@link RunningAppProcessInfo#pid}, 2137 * {@link RunningAppProcessInfo#uid}, 2138 * {@link RunningAppProcessInfo#lastTrimLevel}, 2139 * {@link RunningAppProcessInfo#importance}, 2140 * {@link RunningAppProcessInfo#lru}, and 2141 * {@link RunningAppProcessInfo#importanceReasonCode}. 2142 */ 2143 static public void getMyMemoryState(RunningAppProcessInfo outState) { 2144 try { 2145 ActivityManagerNative.getDefault().getMyMemoryState(outState); 2146 } catch (RemoteException e) { 2147 } 2148 } 2149 2150 /** 2151 * Return information about the memory usage of one or more processes. 2152 * 2153 * <p><b>Note: this method is only intended for debugging or building 2154 * a user-facing process management UI.</b></p> 2155 * 2156 * @param pids The pids of the processes whose memory usage is to be 2157 * retrieved. 2158 * @return Returns an array of memory information, one for each 2159 * requested pid. 2160 */ 2161 public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) { 2162 try { 2163 return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids); 2164 } catch (RemoteException e) { 2165 return null; 2166 } 2167 } 2168 2169 /** 2170 * @deprecated This is now just a wrapper for 2171 * {@link #killBackgroundProcesses(String)}; the previous behavior here 2172 * is no longer available to applications because it allows them to 2173 * break other applications by removing their alarms, stopping their 2174 * services, etc. 2175 */ 2176 @Deprecated 2177 public void restartPackage(String packageName) { 2178 killBackgroundProcesses(packageName); 2179 } 2180 2181 /** 2182 * Have the system immediately kill all background processes associated 2183 * with the given package. This is the same as the kernel killing those 2184 * processes to reclaim memory; the system will take care of restarting 2185 * these processes in the future as needed. 2186 * 2187 * <p>You must hold the permission 2188 * {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to 2189 * call this method. 2190 * 2191 * @param packageName The name of the package whose processes are to 2192 * be killed. 2193 */ 2194 public void killBackgroundProcesses(String packageName) { 2195 try { 2196 ActivityManagerNative.getDefault().killBackgroundProcesses(packageName, 2197 UserHandle.myUserId()); 2198 } catch (RemoteException e) { 2199 } 2200 } 2201 2202 /** 2203 * Have the system perform a force stop of everything associated with 2204 * the given application package. All processes that share its uid 2205 * will be killed, all services it has running stopped, all activities 2206 * removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED} 2207 * broadcast will be sent, so that any of its registered alarms can 2208 * be stopped, notifications removed, etc. 2209 * 2210 * <p>You must hold the permission 2211 * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to 2212 * call this method. 2213 * 2214 * @param packageName The name of the package to be stopped. 2215 * 2216 * @hide This is not available to third party applications due to 2217 * it allowing them to break other applications by stopping their 2218 * services, removing their alarms, etc. 2219 */ 2220 public void forceStopPackage(String packageName) { 2221 try { 2222 ActivityManagerNative.getDefault().forceStopPackage(packageName, 2223 UserHandle.myUserId()); 2224 } catch (RemoteException e) { 2225 } 2226 } 2227 2228 /** 2229 * Get the device configuration attributes. 2230 */ 2231 public ConfigurationInfo getDeviceConfigurationInfo() { 2232 try { 2233 return ActivityManagerNative.getDefault().getDeviceConfigurationInfo(); 2234 } catch (RemoteException e) { 2235 } 2236 return null; 2237 } 2238 2239 /** 2240 * Get the preferred density of icons for the launcher. This is used when 2241 * custom drawables are created (e.g., for shortcuts). 2242 * 2243 * @return density in terms of DPI 2244 */ 2245 public int getLauncherLargeIconDensity() { 2246 final Resources res = mContext.getResources(); 2247 final int density = res.getDisplayMetrics().densityDpi; 2248 final int sw = res.getConfiguration().smallestScreenWidthDp; 2249 2250 if (sw < 600) { 2251 // Smaller than approx 7" tablets, use the regular icon size. 2252 return density; 2253 } 2254 2255 switch (density) { 2256 case DisplayMetrics.DENSITY_LOW: 2257 return DisplayMetrics.DENSITY_MEDIUM; 2258 case DisplayMetrics.DENSITY_MEDIUM: 2259 return DisplayMetrics.DENSITY_HIGH; 2260 case DisplayMetrics.DENSITY_TV: 2261 return DisplayMetrics.DENSITY_XHIGH; 2262 case DisplayMetrics.DENSITY_HIGH: 2263 return DisplayMetrics.DENSITY_XHIGH; 2264 case DisplayMetrics.DENSITY_XHIGH: 2265 return DisplayMetrics.DENSITY_XXHIGH; 2266 case DisplayMetrics.DENSITY_XXHIGH: 2267 return DisplayMetrics.DENSITY_XHIGH * 2; 2268 default: 2269 // The density is some abnormal value. Return some other 2270 // abnormal value that is a reasonable scaling of it. 2271 return (int)((density*1.5f)+.5f); 2272 } 2273 } 2274 2275 /** 2276 * Get the preferred launcher icon size. This is used when custom drawables 2277 * are created (e.g., for shortcuts). 2278 * 2279 * @return dimensions of square icons in terms of pixels 2280 */ 2281 public int getLauncherLargeIconSize() { 2282 return getLauncherLargeIconSizeInner(mContext); 2283 } 2284 2285 static int getLauncherLargeIconSizeInner(Context context) { 2286 final Resources res = context.getResources(); 2287 final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size); 2288 final int sw = res.getConfiguration().smallestScreenWidthDp; 2289 2290 if (sw < 600) { 2291 // Smaller than approx 7" tablets, use the regular icon size. 2292 return size; 2293 } 2294 2295 final int density = res.getDisplayMetrics().densityDpi; 2296 2297 switch (density) { 2298 case DisplayMetrics.DENSITY_LOW: 2299 return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW; 2300 case DisplayMetrics.DENSITY_MEDIUM: 2301 return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM; 2302 case DisplayMetrics.DENSITY_TV: 2303 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2304 case DisplayMetrics.DENSITY_HIGH: 2305 return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH; 2306 case DisplayMetrics.DENSITY_XHIGH: 2307 return (size * DisplayMetrics.DENSITY_XXHIGH) / DisplayMetrics.DENSITY_XHIGH; 2308 case DisplayMetrics.DENSITY_XXHIGH: 2309 return (size * DisplayMetrics.DENSITY_XHIGH*2) / DisplayMetrics.DENSITY_XXHIGH; 2310 default: 2311 // The density is some abnormal value. Return some other 2312 // abnormal value that is a reasonable scaling of it. 2313 return (int)((size*1.5f) + .5f); 2314 } 2315 } 2316 2317 /** 2318 * Returns "true" if the user interface is currently being messed with 2319 * by a monkey. 2320 */ 2321 public static boolean isUserAMonkey() { 2322 try { 2323 return ActivityManagerNative.getDefault().isUserAMonkey(); 2324 } catch (RemoteException e) { 2325 } 2326 return false; 2327 } 2328 2329 /** 2330 * Returns "true" if device is running in a test harness. 2331 */ 2332 public static boolean isRunningInTestHarness() { 2333 return SystemProperties.getBoolean("ro.test_harness", false); 2334 } 2335 2336 /** 2337 * Returns the launch count of each installed package. 2338 * 2339 * @hide 2340 */ 2341 /*public Map<String, Integer> getAllPackageLaunchCounts() { 2342 try { 2343 IUsageStats usageStatsService = IUsageStats.Stub.asInterface( 2344 ServiceManager.getService("usagestats")); 2345 if (usageStatsService == null) { 2346 return new HashMap<String, Integer>(); 2347 } 2348 2349 UsageStats.PackageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats( 2350 ActivityThread.currentPackageName()); 2351 if (allPkgUsageStats == null) { 2352 return new HashMap<String, Integer>(); 2353 } 2354 2355 Map<String, Integer> launchCounts = new HashMap<String, Integer>(); 2356 for (UsageStats.PackageStats pkgUsageStats : allPkgUsageStats) { 2357 launchCounts.put(pkgUsageStats.getPackageName(), pkgUsageStats.getLaunchCount()); 2358 } 2359 2360 return launchCounts; 2361 } catch (RemoteException e) { 2362 Log.w(TAG, "Could not query launch counts", e); 2363 return new HashMap<String, Integer>(); 2364 } 2365 }*/ 2366 2367 /** @hide */ 2368 public static int checkComponentPermission(String permission, int uid, 2369 int owningUid, boolean exported) { 2370 // Root, system server get to do everything. 2371 if (uid == 0 || uid == Process.SYSTEM_UID) { 2372 return PackageManager.PERMISSION_GRANTED; 2373 } 2374 // Isolated processes don't get any permissions. 2375 if (UserHandle.isIsolated(uid)) { 2376 return PackageManager.PERMISSION_DENIED; 2377 } 2378 // If there is a uid that owns whatever is being accessed, it has 2379 // blanket access to it regardless of the permissions it requires. 2380 if (owningUid >= 0 && UserHandle.isSameApp(uid, owningUid)) { 2381 return PackageManager.PERMISSION_GRANTED; 2382 } 2383 // If the target is not exported, then nobody else can get to it. 2384 if (!exported) { 2385 /* 2386 RuntimeException here = new RuntimeException("here"); 2387 here.fillInStackTrace(); 2388 Slog.w(TAG, "Permission denied: checkComponentPermission() owningUid=" + owningUid, 2389 here); 2390 */ 2391 return PackageManager.PERMISSION_DENIED; 2392 } 2393 if (permission == null) { 2394 return PackageManager.PERMISSION_GRANTED; 2395 } 2396 try { 2397 return AppGlobals.getPackageManager() 2398 .checkUidPermission(permission, uid); 2399 } catch (RemoteException e) { 2400 // Should never happen, but if it does... deny! 2401 Slog.e(TAG, "PackageManager is dead?!?", e); 2402 } 2403 return PackageManager.PERMISSION_DENIED; 2404 } 2405 2406 /** @hide */ 2407 public static int checkUidPermission(String permission, int uid) { 2408 try { 2409 return AppGlobals.getPackageManager() 2410 .checkUidPermission(permission, uid); 2411 } catch (RemoteException e) { 2412 // Should never happen, but if it does... deny! 2413 Slog.e(TAG, "PackageManager is dead?!?", e); 2414 } 2415 return PackageManager.PERMISSION_DENIED; 2416 } 2417 2418 /** 2419 * @hide 2420 * Helper for dealing with incoming user arguments to system service calls. 2421 * Takes care of checking permissions and converting USER_CURRENT to the 2422 * actual current user. 2423 * 2424 * @param callingPid The pid of the incoming call, as per Binder.getCallingPid(). 2425 * @param callingUid The uid of the incoming call, as per Binder.getCallingUid(). 2426 * @param userId The user id argument supplied by the caller -- this is the user 2427 * they want to run as. 2428 * @param allowAll If true, we will allow USER_ALL. This means you must be prepared 2429 * to get a USER_ALL returned and deal with it correctly. If false, 2430 * an exception will be thrown if USER_ALL is supplied. 2431 * @param requireFull If true, the caller must hold 2432 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} to be able to run as a 2433 * different user than their current process; otherwise they must hold 2434 * {@link android.Manifest.permission#INTERACT_ACROSS_USERS}. 2435 * @param name Optional textual name of the incoming call; only for generating error messages. 2436 * @param callerPackage Optional package name of caller; only for error messages. 2437 * 2438 * @return Returns the user ID that the call should run as. Will always be a concrete 2439 * user number, unless <var>allowAll</var> is true in which case it could also be 2440 * USER_ALL. 2441 */ 2442 public static int handleIncomingUser(int callingPid, int callingUid, int userId, 2443 boolean allowAll, boolean requireFull, String name, String callerPackage) { 2444 if (UserHandle.getUserId(callingUid) == userId) { 2445 return userId; 2446 } 2447 try { 2448 return ActivityManagerNative.getDefault().handleIncomingUser(callingPid, 2449 callingUid, userId, allowAll, requireFull, name, callerPackage); 2450 } catch (RemoteException e) { 2451 throw new SecurityException("Failed calling activity manager", e); 2452 } 2453 } 2454 2455 /** @hide */ 2456 public static int getCurrentUser() { 2457 UserInfo ui; 2458 try { 2459 ui = ActivityManagerNative.getDefault().getCurrentUser(); 2460 return ui != null ? ui.id : 0; 2461 } catch (RemoteException e) { 2462 return 0; 2463 } 2464 } 2465 2466 /** 2467 * @param userid the user's id. Zero indicates the default user 2468 * @hide 2469 */ 2470 public boolean switchUser(int userid) { 2471 try { 2472 return ActivityManagerNative.getDefault().switchUser(userid); 2473 } catch (RemoteException e) { 2474 return false; 2475 } 2476 } 2477 2478 /** 2479 * Return whether the given user is actively running. This means that 2480 * the user is in the "started" state, not "stopped" -- it is currently 2481 * allowed to run code through scheduled alarms, receiving broadcasts, 2482 * etc. A started user may be either the current foreground user or a 2483 * background user; the result here does not distinguish between the two. 2484 * @param userid the user's id. Zero indicates the default user. 2485 * @hide 2486 */ 2487 public boolean isUserRunning(int userid) { 2488 try { 2489 return ActivityManagerNative.getDefault().isUserRunning(userid, false); 2490 } catch (RemoteException e) { 2491 return false; 2492 } 2493 } 2494 2495 /** 2496 * Perform a system dump of various state associated with the given application 2497 * package name. This call blocks while the dump is being performed, so should 2498 * not be done on a UI thread. The data will be written to the given file 2499 * descriptor as text. An application must hold the 2500 * {@link android.Manifest.permission#DUMP} permission to make this call. 2501 * @param fd The file descriptor that the dump should be written to. The file 2502 * descriptor is <em>not</em> closed by this function; the caller continues to 2503 * own it. 2504 * @param packageName The name of the package that is to be dumped. 2505 */ 2506 public void dumpPackageState(FileDescriptor fd, String packageName) { 2507 dumpPackageStateStatic(fd, packageName); 2508 } 2509 2510 /** 2511 * @hide 2512 */ 2513 public static void dumpPackageStateStatic(FileDescriptor fd, String packageName) { 2514 FileOutputStream fout = new FileOutputStream(fd); 2515 PrintWriter pw = new FastPrintWriter(fout); 2516 dumpService(pw, fd, Context.ACTIVITY_SERVICE, new String[] { 2517 "-a", "package", packageName }); 2518 pw.println(); 2519 dumpService(pw, fd, "meminfo", new String[] { "--local", packageName }); 2520 pw.println(); 2521 dumpService(pw, fd, ProcessStats.SERVICE_NAME, new String[] { "-a", packageName }); 2522 pw.println(); 2523 dumpService(pw, fd, "usagestats", new String[] { "--packages", packageName }); 2524 pw.println(); 2525 dumpService(pw, fd, "package", new String[] { packageName }); 2526 pw.println(); 2527 dumpService(pw, fd, BatteryStats.SERVICE_NAME, new String[] { packageName }); 2528 pw.flush(); 2529 } 2530 2531 private static void dumpService(PrintWriter pw, FileDescriptor fd, String name, String[] args) { 2532 pw.print("DUMP OF SERVICE "); pw.print(name); pw.println(":"); 2533 IBinder service = ServiceManager.checkService(name); 2534 if (service == null) { 2535 pw.println(" (Service not found)"); 2536 return; 2537 } 2538 TransferPipe tp = null; 2539 try { 2540 pw.flush(); 2541 tp = new TransferPipe(); 2542 tp.setBufferPrefix(" "); 2543 service.dumpAsync(tp.getWriteFd().getFileDescriptor(), args); 2544 tp.go(fd); 2545 } catch (Throwable e) { 2546 if (tp != null) { 2547 tp.kill(); 2548 } 2549 pw.println("Failure dumping service:"); 2550 e.printStackTrace(pw); 2551 } 2552 } 2553 2554 /** 2555 * @hide 2556 */ 2557 public void startLockTaskMode(int taskId) { 2558 try { 2559 ActivityManagerNative.getDefault().startLockTaskMode(taskId); 2560 } catch (RemoteException e) { 2561 } 2562 } 2563 2564 /** 2565 * @hide 2566 */ 2567 public void stopLockTaskMode() { 2568 try { 2569 ActivityManagerNative.getDefault().stopLockTaskMode(); 2570 } catch (RemoteException e) { 2571 } 2572 } 2573 2574 /** 2575 * Return whether currently in lock task mode. When in this mode 2576 * no new tasks can be created or switched to. 2577 * 2578 * @see Activity#startLockTask() 2579 */ 2580 public boolean isInLockTaskMode() { 2581 try { 2582 return ActivityManagerNative.getDefault().isInLockTaskMode(); 2583 } catch (RemoteException e) { 2584 return false; 2585 } 2586 } 2587 2588 /** 2589 * The AppTask allows you to manage your own application's tasks. 2590 * See {@link android.app.ActivityManager#getAppTasks()} 2591 */ 2592 public static class AppTask { 2593 private IAppTask mAppTaskImpl; 2594 2595 /** @hide */ 2596 public AppTask(IAppTask task) { 2597 mAppTaskImpl = task; 2598 } 2599 2600 /** 2601 * Finishes all activities in this task and removes it from the recent tasks list. 2602 */ 2603 public void finishAndRemoveTask() { 2604 try { 2605 mAppTaskImpl.finishAndRemoveTask(); 2606 } catch (RemoteException e) { 2607 Slog.e(TAG, "Invalid AppTask", e); 2608 } 2609 } 2610 2611 /** 2612 * Get the RecentTaskInfo associated with this task. 2613 * 2614 * @return The RecentTaskInfo for this task, or null if the task no longer exists. 2615 */ 2616 public RecentTaskInfo getTaskInfo() { 2617 try { 2618 return mAppTaskImpl.getTaskInfo(); 2619 } catch (RemoteException e) { 2620 Slog.e(TAG, "Invalid AppTask", e); 2621 return null; 2622 } 2623 } 2624 2625 /** 2626 * Modify the {@link Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag in the root 2627 * Intent of this AppTask. 2628 * 2629 * @param exclude If true, {@link Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} will 2630 * be set; otherwise, it will be cleared. 2631 */ 2632 public void setExcludeFromRecents(boolean exclude) { 2633 try { 2634 mAppTaskImpl.setExcludeFromRecents(exclude); 2635 } catch (RemoteException e) { 2636 Slog.e(TAG, "Invalid AppTask", e); 2637 } 2638 } 2639 } 2640} 2641