WallpaperManagerService.java revision 4e2820c22b3f8b330f8c6d04562037c77845716d
1/* 2 * Copyright (C) 2008 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 com.android.server; 18 19import static android.os.FileObserver.*; 20import static android.os.ParcelFileDescriptor.*; 21 22import android.app.AppGlobals; 23import android.app.IWallpaperManager; 24import android.app.IWallpaperManagerCallback; 25import android.app.PendingIntent; 26import android.app.WallpaperInfo; 27import android.app.backup.BackupManager; 28import android.app.backup.WallpaperBackupHelper; 29import android.content.BroadcastReceiver; 30import android.content.ComponentName; 31import android.content.Context; 32import android.content.Intent; 33import android.content.IntentFilter; 34import android.content.ServiceConnection; 35import android.content.pm.IPackageManager; 36import android.content.pm.PackageManager; 37import android.content.pm.ResolveInfo; 38import android.content.pm.ServiceInfo; 39import android.content.pm.PackageManager.NameNotFoundException; 40import android.content.res.Resources; 41import android.os.Binder; 42import android.os.Bundle; 43import android.os.Environment; 44import android.os.FileUtils; 45import android.os.IBinder; 46import android.os.RemoteException; 47import android.os.FileObserver; 48import android.os.ParcelFileDescriptor; 49import android.os.RemoteCallbackList; 50import android.os.SELinux; 51import android.os.ServiceManager; 52import android.os.SystemClock; 53import android.os.UserHandle; 54import android.service.wallpaper.IWallpaperConnection; 55import android.service.wallpaper.IWallpaperEngine; 56import android.service.wallpaper.IWallpaperService; 57import android.service.wallpaper.WallpaperService; 58import android.util.Slog; 59import android.util.SparseArray; 60import android.util.Xml; 61import android.view.Display; 62import android.view.IWindowManager; 63import android.view.WindowManager; 64 65import java.io.FileDescriptor; 66import java.io.IOException; 67import java.io.InputStream; 68import java.io.File; 69import java.io.FileNotFoundException; 70import java.io.FileInputStream; 71import java.io.FileOutputStream; 72import java.io.PrintWriter; 73import java.util.List; 74 75import org.xmlpull.v1.XmlPullParser; 76import org.xmlpull.v1.XmlPullParserException; 77import org.xmlpull.v1.XmlSerializer; 78 79import com.android.internal.content.PackageMonitor; 80import com.android.internal.util.FastXmlSerializer; 81import com.android.internal.util.JournaledFile; 82import com.android.server.am.ActivityManagerService; 83 84class WallpaperManagerService extends IWallpaperManager.Stub { 85 static final String TAG = "WallpaperService"; 86 static final boolean DEBUG = false; 87 88 final Object mLock = new Object[0]; 89 90 /** 91 * Minimum time between crashes of a wallpaper service for us to consider 92 * restarting it vs. just reverting to the static wallpaper. 93 */ 94 static final long MIN_WALLPAPER_CRASH_TIME = 10000; 95 96 static final File WALLPAPER_BASE_DIR = new File("/data/system/users"); 97 static final String WALLPAPER = "wallpaper"; 98 static final String WALLPAPER_INFO = "wallpaper_info.xml"; 99 100 /** 101 * Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks 102 * that the wallpaper has changed. The CREATE is triggered when there is no 103 * wallpaper set and is created for the first time. The CLOSE_WRITE is triggered 104 * everytime the wallpaper is changed. 105 */ 106 private class WallpaperObserver extends FileObserver { 107 108 final WallpaperData mWallpaper; 109 final File mWallpaperDir; 110 final File mWallpaperFile; 111 112 public WallpaperObserver(WallpaperData wallpaper) { 113 super(getWallpaperDir(wallpaper.userId).getAbsolutePath(), 114 CLOSE_WRITE | DELETE | DELETE_SELF); 115 mWallpaperDir = getWallpaperDir(wallpaper.userId); 116 mWallpaper = wallpaper; 117 mWallpaperFile = new File(mWallpaperDir, WALLPAPER); 118 } 119 120 @Override 121 public void onEvent(int event, String path) { 122 if (path == null) { 123 return; 124 } 125 synchronized (mLock) { 126 // changing the wallpaper means we'll need to back up the new one 127 long origId = Binder.clearCallingIdentity(); 128 BackupManager bm = new BackupManager(mContext); 129 bm.dataChanged(); 130 Binder.restoreCallingIdentity(origId); 131 132 File changedFile = new File(mWallpaperDir, path); 133 if (mWallpaperFile.equals(changedFile)) { 134 notifyCallbacksLocked(mWallpaper); 135 if (mWallpaper.wallpaperComponent == null || event != CLOSE_WRITE 136 || mWallpaper.imageWallpaperPending) { 137 if (event == CLOSE_WRITE) { 138 mWallpaper.imageWallpaperPending = false; 139 } 140 bindWallpaperComponentLocked(mWallpaper.imageWallpaperComponent, true, 141 false, mWallpaper); 142 saveSettingsLocked(mWallpaper); 143 } 144 } 145 } 146 } 147 } 148 149 final Context mContext; 150 final IWindowManager mIWindowManager; 151 final IPackageManager mIPackageManager; 152 final MyPackageMonitor mMonitor; 153 WallpaperData mLastWallpaper; 154 155 SparseArray<WallpaperData> mWallpaperMap = new SparseArray<WallpaperData>(); 156 157 int mCurrentUserId; 158 159 static class WallpaperData { 160 161 int userId; 162 163 File wallpaperFile; 164 165 /** 166 * Client is currently writing a new image wallpaper. 167 */ 168 boolean imageWallpaperPending; 169 170 /** 171 * Resource name if using a picture from the wallpaper gallery 172 */ 173 String name = ""; 174 175 /** 176 * The component name of the currently set live wallpaper. 177 */ 178 ComponentName wallpaperComponent; 179 180 /** 181 * The component name of the wallpaper that should be set next. 182 */ 183 ComponentName nextWallpaperComponent; 184 185 /** 186 * Name of the component used to display bitmap wallpapers from either the gallery or 187 * built-in wallpapers. 188 */ 189 ComponentName imageWallpaperComponent = new ComponentName("com.android.systemui", 190 "com.android.systemui.ImageWallpaper"); 191 192 WallpaperConnection connection; 193 long lastDiedTime; 194 boolean wallpaperUpdating; 195 WallpaperObserver wallpaperObserver; 196 197 /** 198 * List of callbacks registered they should each be notified when the wallpaper is changed. 199 */ 200 private RemoteCallbackList<IWallpaperManagerCallback> callbacks 201 = new RemoteCallbackList<IWallpaperManagerCallback>(); 202 203 int width = -1; 204 int height = -1; 205 206 WallpaperData(int userId) { 207 this.userId = userId; 208 wallpaperFile = new File(getWallpaperDir(userId), WALLPAPER); 209 } 210 } 211 212 class WallpaperConnection extends IWallpaperConnection.Stub 213 implements ServiceConnection { 214 final WallpaperInfo mInfo; 215 final Binder mToken = new Binder(); 216 IWallpaperService mService; 217 IWallpaperEngine mEngine; 218 WallpaperData mWallpaper; 219 220 public WallpaperConnection(WallpaperInfo info, WallpaperData wallpaper) { 221 mInfo = info; 222 mWallpaper = wallpaper; 223 } 224 225 public void onServiceConnected(ComponentName name, IBinder service) { 226 synchronized (mLock) { 227 if (mWallpaper.connection == this) { 228 mWallpaper.lastDiedTime = SystemClock.uptimeMillis(); 229 mService = IWallpaperService.Stub.asInterface(service); 230 attachServiceLocked(this, mWallpaper); 231 // XXX should probably do saveSettingsLocked() later 232 // when we have an engine, but I'm not sure about 233 // locking there and anyway we always need to be able to 234 // recover if there is something wrong. 235 saveSettingsLocked(mWallpaper); 236 } 237 } 238 } 239 240 public void onServiceDisconnected(ComponentName name) { 241 synchronized (mLock) { 242 mService = null; 243 mEngine = null; 244 if (mWallpaper.connection == this) { 245 Slog.w(TAG, "Wallpaper service gone: " + mWallpaper.wallpaperComponent); 246 if (!mWallpaper.wallpaperUpdating 247 && (mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME) 248 > SystemClock.uptimeMillis() 249 && mWallpaper.userId == mCurrentUserId) { 250 Slog.w(TAG, "Reverting to built-in wallpaper!"); 251 clearWallpaperLocked(true, mWallpaper.userId); 252 } 253 } 254 } 255 } 256 257 public void attachEngine(IWallpaperEngine engine) { 258 mEngine = engine; 259 } 260 261 public ParcelFileDescriptor setWallpaper(String name) { 262 synchronized (mLock) { 263 if (mWallpaper.connection == this) { 264 return updateWallpaperBitmapLocked(name, mWallpaper); 265 } 266 return null; 267 } 268 } 269 } 270 271 class MyPackageMonitor extends PackageMonitor { 272 @Override 273 public void onPackageUpdateFinished(String packageName, int uid) { 274 synchronized (mLock) { 275 for (int i = 0; i < mWallpaperMap.size(); i++) { 276 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 277 if (wallpaper.wallpaperComponent != null 278 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 279 wallpaper.wallpaperUpdating = false; 280 ComponentName comp = wallpaper.wallpaperComponent; 281 clearWallpaperComponentLocked(wallpaper); 282 // Do this only for the current user's wallpaper 283 if (wallpaper.userId == mCurrentUserId 284 && !bindWallpaperComponentLocked(comp, false, false, wallpaper)) { 285 Slog.w(TAG, "Wallpaper no longer available; reverting to default"); 286 clearWallpaperLocked(false, wallpaper.userId); 287 } 288 } 289 } 290 } 291 } 292 293 @Override 294 public void onPackageModified(String packageName) { 295 synchronized (mLock) { 296 for (int i = 0; i < mWallpaperMap.size(); i++) { 297 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 298 if (wallpaper.wallpaperComponent == null 299 || !wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 300 continue; 301 } 302 doPackagesChangedLocked(true, wallpaper); 303 } 304 } 305 } 306 307 @Override 308 public void onPackageUpdateStarted(String packageName, int uid) { 309 synchronized (mLock) { 310 for (int i = 0; i < mWallpaperMap.size(); i++) { 311 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 312 if (wallpaper.wallpaperComponent != null 313 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 314 wallpaper.wallpaperUpdating = true; 315 } 316 } 317 } 318 } 319 320 @Override 321 public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { 322 synchronized (mLock) { 323 boolean changed = false; 324 for (int i = 0; i < mWallpaperMap.size(); i++) { 325 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 326 boolean res = doPackagesChangedLocked(doit, wallpaper); 327 changed |= res; 328 } 329 return changed; 330 } 331 } 332 333 @Override 334 public void onSomePackagesChanged() { 335 synchronized (mLock) { 336 for (int i = 0; i < mWallpaperMap.size(); i++) { 337 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 338 doPackagesChangedLocked(true, wallpaper); 339 } 340 } 341 } 342 343 boolean doPackagesChangedLocked(boolean doit, WallpaperData wallpaper) { 344 boolean changed = false; 345 if (wallpaper.wallpaperComponent != null) { 346 int change = isPackageDisappearing(wallpaper.wallpaperComponent 347 .getPackageName()); 348 if (change == PACKAGE_PERMANENT_CHANGE 349 || change == PACKAGE_TEMPORARY_CHANGE) { 350 changed = true; 351 if (doit) { 352 Slog.w(TAG, "Wallpaper uninstalled, removing: " 353 + wallpaper.wallpaperComponent); 354 clearWallpaperLocked(false, wallpaper.userId); 355 } 356 } 357 } 358 if (wallpaper.nextWallpaperComponent != null) { 359 int change = isPackageDisappearing(wallpaper.nextWallpaperComponent 360 .getPackageName()); 361 if (change == PACKAGE_PERMANENT_CHANGE 362 || change == PACKAGE_TEMPORARY_CHANGE) { 363 wallpaper.nextWallpaperComponent = null; 364 } 365 } 366 if (wallpaper.wallpaperComponent != null 367 && isPackageModified(wallpaper.wallpaperComponent.getPackageName())) { 368 try { 369 mContext.getPackageManager().getServiceInfo( 370 wallpaper.wallpaperComponent, 0); 371 } catch (NameNotFoundException e) { 372 Slog.w(TAG, "Wallpaper component gone, removing: " 373 + wallpaper.wallpaperComponent); 374 clearWallpaperLocked(false, wallpaper.userId); 375 } 376 } 377 if (wallpaper.nextWallpaperComponent != null 378 && isPackageModified(wallpaper.nextWallpaperComponent.getPackageName())) { 379 try { 380 mContext.getPackageManager().getServiceInfo( 381 wallpaper.nextWallpaperComponent, 0); 382 } catch (NameNotFoundException e) { 383 wallpaper.nextWallpaperComponent = null; 384 } 385 } 386 return changed; 387 } 388 } 389 390 public WallpaperManagerService(Context context) { 391 if (DEBUG) Slog.v(TAG, "WallpaperService startup"); 392 mContext = context; 393 mIWindowManager = IWindowManager.Stub.asInterface( 394 ServiceManager.getService(Context.WINDOW_SERVICE)); 395 mIPackageManager = AppGlobals.getPackageManager(); 396 mMonitor = new MyPackageMonitor(); 397 mMonitor.register(context, null, true); 398 WALLPAPER_BASE_DIR.mkdirs(); 399 loadSettingsLocked(0); 400 } 401 402 private static File getWallpaperDir(int userId) { 403 return new File(WALLPAPER_BASE_DIR + "/" + userId); 404 } 405 406 @Override 407 protected void finalize() throws Throwable { 408 super.finalize(); 409 for (int i = 0; i < mWallpaperMap.size(); i++) { 410 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 411 wallpaper.wallpaperObserver.stopWatching(); 412 } 413 } 414 415 public void systemReady() { 416 if (DEBUG) Slog.v(TAG, "systemReady"); 417 WallpaperData wallpaper = mWallpaperMap.get(0); 418 switchWallpaper(wallpaper); 419 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 420 wallpaper.wallpaperObserver.startWatching(); 421 422 IntentFilter userFilter = new IntentFilter(); 423 userFilter.addAction(Intent.ACTION_USER_SWITCHED); 424 userFilter.addAction(Intent.ACTION_USER_REMOVED); 425 mContext.registerReceiver(new BroadcastReceiver() { 426 @Override 427 public void onReceive(Context context, Intent intent) { 428 String action = intent.getAction(); 429 if (Intent.ACTION_USER_SWITCHED.equals(action)) { 430 switchUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0)); 431 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 432 removeUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0)); 433 } 434 } 435 }, userFilter); 436 } 437 438 String getName() { 439 return mWallpaperMap.get(0).name; 440 } 441 442 void removeUser(int userId) { 443 synchronized (mLock) { 444 WallpaperData wallpaper = mWallpaperMap.get(userId); 445 if (wallpaper != null) { 446 wallpaper.wallpaperObserver.stopWatching(); 447 mWallpaperMap.remove(userId); 448 } 449 File wallpaperFile = new File(getWallpaperDir(userId), WALLPAPER); 450 wallpaperFile.delete(); 451 File wallpaperInfoFile = new File(getWallpaperDir(userId), WALLPAPER_INFO); 452 wallpaperInfoFile.delete(); 453 } 454 } 455 456 void switchUser(int userId) { 457 synchronized (mLock) { 458 mCurrentUserId = userId; 459 WallpaperData wallpaper = mWallpaperMap.get(userId); 460 if (wallpaper == null) { 461 wallpaper = new WallpaperData(userId); 462 mWallpaperMap.put(userId, wallpaper); 463 loadSettingsLocked(userId); 464 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 465 wallpaper.wallpaperObserver.startWatching(); 466 } 467 switchWallpaper(wallpaper); 468 } 469 } 470 471 void switchWallpaper(WallpaperData wallpaper) { 472 synchronized (mLock) { 473 RuntimeException e = null; 474 try { 475 ComponentName cname = wallpaper.wallpaperComponent != null ? 476 wallpaper.wallpaperComponent : wallpaper.nextWallpaperComponent; 477 if (bindWallpaperComponentLocked(cname, true, false, wallpaper)) { 478 return; 479 } 480 } catch (RuntimeException e1) { 481 e = e1; 482 } 483 Slog.w(TAG, "Failure starting previous wallpaper", e); 484 clearWallpaperLocked(false, wallpaper.userId); 485 } 486 } 487 488 public void clearWallpaper() { 489 if (DEBUG) Slog.v(TAG, "clearWallpaper"); 490 synchronized (mLock) { 491 clearWallpaperLocked(false, UserHandle.getCallingUserId()); 492 } 493 } 494 495 void clearWallpaperLocked(boolean defaultFailed, int userId) { 496 WallpaperData wallpaper = mWallpaperMap.get(userId); 497 File f = new File(getWallpaperDir(userId), WALLPAPER); 498 if (f.exists()) { 499 f.delete(); 500 } 501 final long ident = Binder.clearCallingIdentity(); 502 RuntimeException e = null; 503 try { 504 wallpaper.imageWallpaperPending = false; 505 if (userId != mCurrentUserId) return; 506 if (bindWallpaperComponentLocked(defaultFailed 507 ? wallpaper.imageWallpaperComponent 508 : null, true, false, wallpaper)) { 509 return; 510 } 511 } catch (IllegalArgumentException e1) { 512 e = e1; 513 } finally { 514 Binder.restoreCallingIdentity(ident); 515 } 516 517 // This can happen if the default wallpaper component doesn't 518 // exist. This should be a system configuration problem, but 519 // let's not let it crash the system and just live with no 520 // wallpaper. 521 Slog.e(TAG, "Default wallpaper component not found!", e); 522 clearWallpaperComponentLocked(wallpaper); 523 } 524 525 public void setDimensionHints(int width, int height) throws RemoteException { 526 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 527 528 int userId = UserHandle.getCallingUserId(); 529 WallpaperData wallpaper = mWallpaperMap.get(userId); 530 if (wallpaper == null) { 531 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 532 } 533 if (width <= 0 || height <= 0) { 534 throw new IllegalArgumentException("width and height must be > 0"); 535 } 536 537 synchronized (mLock) { 538 if (width != wallpaper.width || height != wallpaper.height) { 539 wallpaper.width = width; 540 wallpaper.height = height; 541 saveSettingsLocked(wallpaper); 542 if (mCurrentUserId != userId) return; // Don't change the properties now 543 if (wallpaper.connection != null) { 544 if (wallpaper.connection.mEngine != null) { 545 try { 546 wallpaper.connection.mEngine.setDesiredSize( 547 width, height); 548 } catch (RemoteException e) { 549 } 550 notifyCallbacksLocked(wallpaper); 551 } 552 } 553 } 554 } 555 } 556 557 public int getWidthHint() throws RemoteException { 558 synchronized (mLock) { 559 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 560 return wallpaper.width; 561 } 562 } 563 564 public int getHeightHint() throws RemoteException { 565 synchronized (mLock) { 566 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 567 return wallpaper.height; 568 } 569 } 570 571 public ParcelFileDescriptor getWallpaper(IWallpaperManagerCallback cb, 572 Bundle outParams) { 573 synchronized (mLock) { 574 // This returns the current user's wallpaper, if called by a system service. Else it 575 // returns the wallpaper for the calling user. 576 int callingUid = Binder.getCallingUid(); 577 int wallpaperUserId = 0; 578 if (callingUid == android.os.Process.SYSTEM_UID) { 579 wallpaperUserId = mCurrentUserId; 580 } else { 581 wallpaperUserId = UserHandle.getUserId(callingUid); 582 } 583 WallpaperData wallpaper = mWallpaperMap.get(wallpaperUserId); 584 try { 585 if (outParams != null) { 586 outParams.putInt("width", wallpaper.width); 587 outParams.putInt("height", wallpaper.height); 588 } 589 wallpaper.callbacks.register(cb); 590 File f = new File(getWallpaperDir(wallpaperUserId), WALLPAPER); 591 if (!f.exists()) { 592 return null; 593 } 594 return ParcelFileDescriptor.open(f, MODE_READ_ONLY); 595 } catch (FileNotFoundException e) { 596 /* Shouldn't happen as we check to see if the file exists */ 597 Slog.w(TAG, "Error getting wallpaper", e); 598 } 599 return null; 600 } 601 } 602 603 public WallpaperInfo getWallpaperInfo() { 604 int userId = UserHandle.getCallingUserId(); 605 synchronized (mLock) { 606 WallpaperData wallpaper = mWallpaperMap.get(userId); 607 if (wallpaper.connection != null) { 608 return wallpaper.connection.mInfo; 609 } 610 return null; 611 } 612 } 613 614 public ParcelFileDescriptor setWallpaper(String name) { 615 if (DEBUG) Slog.v(TAG, "setWallpaper"); 616 int userId = UserHandle.getCallingUserId(); 617 WallpaperData wallpaper = mWallpaperMap.get(userId); 618 if (wallpaper == null) { 619 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 620 } 621 checkPermission(android.Manifest.permission.SET_WALLPAPER); 622 synchronized (mLock) { 623 final long ident = Binder.clearCallingIdentity(); 624 try { 625 ParcelFileDescriptor pfd = updateWallpaperBitmapLocked(name, wallpaper); 626 if (pfd != null) { 627 wallpaper.imageWallpaperPending = true; 628 } 629 return pfd; 630 } finally { 631 Binder.restoreCallingIdentity(ident); 632 } 633 } 634 } 635 636 ParcelFileDescriptor updateWallpaperBitmapLocked(String name, WallpaperData wallpaper) { 637 if (name == null) name = ""; 638 try { 639 File dir = getWallpaperDir(wallpaper.userId); 640 if (!dir.exists()) { 641 dir.mkdir(); 642 FileUtils.setPermissions( 643 dir.getPath(), 644 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 645 -1, -1); 646 } 647 File file = new File(dir, WALLPAPER); 648 ParcelFileDescriptor fd = ParcelFileDescriptor.open(file, 649 MODE_CREATE|MODE_READ_WRITE); 650 if (!SELinux.restorecon(file)) { 651 return null; 652 } 653 wallpaper.name = name; 654 return fd; 655 } catch (FileNotFoundException e) { 656 Slog.w(TAG, "Error setting wallpaper", e); 657 } 658 return null; 659 } 660 661 public void setWallpaperComponent(ComponentName name) { 662 if (DEBUG) Slog.v(TAG, "setWallpaperComponent name=" + name); 663 int userId = UserHandle.getCallingUserId(); 664 WallpaperData wallpaper = mWallpaperMap.get(userId); 665 if (wallpaper == null) { 666 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 667 } 668 checkPermission(android.Manifest.permission.SET_WALLPAPER_COMPONENT); 669 synchronized (mLock) { 670 final long ident = Binder.clearCallingIdentity(); 671 try { 672 wallpaper.imageWallpaperPending = false; 673 bindWallpaperComponentLocked(name, false, true, wallpaper); 674 } finally { 675 Binder.restoreCallingIdentity(ident); 676 } 677 } 678 } 679 680 boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force, 681 boolean fromUser, WallpaperData wallpaper) { 682 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName); 683 // Has the component changed? 684 if (!force) { 685 if (wallpaper.connection != null) { 686 if (wallpaper.wallpaperComponent == null) { 687 if (componentName == null) { 688 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: still using default"); 689 // Still using default wallpaper. 690 return true; 691 } 692 } else if (wallpaper.wallpaperComponent.equals(componentName)) { 693 // Changing to same wallpaper. 694 if (DEBUG) Slog.v(TAG, "same wallpaper"); 695 return true; 696 } 697 } 698 } 699 700 try { 701 if (componentName == null) { 702 String defaultComponent = 703 mContext.getString(com.android.internal.R.string.default_wallpaper_component); 704 if (defaultComponent != null) { 705 // See if there is a default wallpaper component specified 706 componentName = ComponentName.unflattenFromString(defaultComponent); 707 if (DEBUG) Slog.v(TAG, "Use default component wallpaper:" + componentName); 708 } 709 if (componentName == null) { 710 // Fall back to static image wallpaper 711 componentName = wallpaper.imageWallpaperComponent; 712 //clearWallpaperComponentLocked(); 713 //return; 714 if (DEBUG) Slog.v(TAG, "Using image wallpaper"); 715 } 716 } 717 int serviceUserId = wallpaper.userId; 718 ServiceInfo si = mIPackageManager.getServiceInfo(componentName, 719 PackageManager.GET_META_DATA | PackageManager.GET_PERMISSIONS, serviceUserId); 720 if (!android.Manifest.permission.BIND_WALLPAPER.equals(si.permission)) { 721 String msg = "Selected service does not require " 722 + android.Manifest.permission.BIND_WALLPAPER 723 + ": " + componentName; 724 if (fromUser) { 725 throw new SecurityException(msg); 726 } 727 Slog.w(TAG, msg); 728 return false; 729 } 730 731 WallpaperInfo wi = null; 732 733 Intent intent = new Intent(WallpaperService.SERVICE_INTERFACE); 734 if (componentName != null && !componentName.equals(wallpaper.imageWallpaperComponent)) { 735 // Make sure the selected service is actually a wallpaper service. 736 List<ResolveInfo> ris = 737 mIPackageManager.queryIntentServices(intent, 738 intent.resolveTypeIfNeeded(mContext.getContentResolver()), 739 PackageManager.GET_META_DATA, serviceUserId); 740 for (int i=0; i<ris.size(); i++) { 741 ServiceInfo rsi = ris.get(i).serviceInfo; 742 if (rsi.name.equals(si.name) && 743 rsi.packageName.equals(si.packageName)) { 744 try { 745 wi = new WallpaperInfo(mContext, ris.get(i)); 746 } catch (XmlPullParserException e) { 747 if (fromUser) { 748 throw new IllegalArgumentException(e); 749 } 750 Slog.w(TAG, e); 751 return false; 752 } catch (IOException e) { 753 if (fromUser) { 754 throw new IllegalArgumentException(e); 755 } 756 Slog.w(TAG, e); 757 return false; 758 } 759 break; 760 } 761 } 762 if (wi == null) { 763 String msg = "Selected service is not a wallpaper: " 764 + componentName; 765 if (fromUser) { 766 throw new SecurityException(msg); 767 } 768 Slog.w(TAG, msg); 769 return false; 770 } 771 } 772 773 // Bind the service! 774 if (DEBUG) Slog.v(TAG, "Binding to:" + componentName); 775 WallpaperConnection newConn = new WallpaperConnection(wi, wallpaper); 776 intent.setComponent(componentName); 777 intent.putExtra(Intent.EXTRA_CLIENT_LABEL, 778 com.android.internal.R.string.wallpaper_binding_label); 779 intent.putExtra(Intent.EXTRA_CLIENT_INTENT, PendingIntent.getActivity( 780 mContext, 0, 781 Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER), 782 mContext.getText(com.android.internal.R.string.chooser_wallpaper)), 783 0)); 784 if (!mContext.bindService(intent, newConn, Context.BIND_AUTO_CREATE, serviceUserId)) { 785 String msg = "Unable to bind service: " 786 + componentName; 787 if (fromUser) { 788 throw new IllegalArgumentException(msg); 789 } 790 Slog.w(TAG, msg); 791 return false; 792 } 793 if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) { 794 detachWallpaperLocked(mLastWallpaper); 795 } 796 wallpaper.wallpaperComponent = componentName; 797 wallpaper.connection = newConn; 798 wallpaper.lastDiedTime = SystemClock.uptimeMillis(); 799 try { 800 if (wallpaper.userId == mCurrentUserId) { 801 if (DEBUG) 802 Slog.v(TAG, "Adding window token: " + newConn.mToken); 803 mIWindowManager.addWindowToken(newConn.mToken, 804 WindowManager.LayoutParams.TYPE_WALLPAPER); 805 mLastWallpaper = wallpaper; 806 } 807 } catch (RemoteException e) { 808 } 809 } catch (RemoteException e) { 810 String msg = "Remote exception for " + componentName + "\n" + e; 811 if (fromUser) { 812 throw new IllegalArgumentException(msg); 813 } 814 Slog.w(TAG, msg); 815 return false; 816 } 817 return true; 818 } 819 820 void detachWallpaperLocked(WallpaperData wallpaper) { 821 if (wallpaper.connection != null) { 822 if (wallpaper.connection.mEngine != null) { 823 try { 824 wallpaper.connection.mEngine.destroy(); 825 } catch (RemoteException e) { 826 } 827 } 828 mContext.unbindService(wallpaper.connection); 829 try { 830 if (DEBUG) 831 Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken); 832 mIWindowManager.removeWindowToken(wallpaper.connection.mToken); 833 } catch (RemoteException e) { 834 } 835 wallpaper.connection.mService = null; 836 wallpaper.connection.mEngine = null; 837 wallpaper.connection = null; 838 } 839 } 840 841 void clearWallpaperComponentLocked(WallpaperData wallpaper) { 842 wallpaper.wallpaperComponent = null; 843 detachWallpaperLocked(wallpaper); 844 } 845 846 void attachServiceLocked(WallpaperConnection conn, WallpaperData wallpaper) { 847 try { 848 conn.mService.attach(conn, conn.mToken, 849 WindowManager.LayoutParams.TYPE_WALLPAPER, false, 850 wallpaper.width, wallpaper.height); 851 } catch (RemoteException e) { 852 Slog.w(TAG, "Failed attaching wallpaper; clearing", e); 853 if (!wallpaper.wallpaperUpdating) { 854 bindWallpaperComponentLocked(null, false, false, wallpaper); 855 } 856 } 857 } 858 859 private void notifyCallbacksLocked(WallpaperData wallpaper) { 860 final int n = wallpaper.callbacks.beginBroadcast(); 861 for (int i = 0; i < n; i++) { 862 try { 863 wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged(); 864 } catch (RemoteException e) { 865 866 // The RemoteCallbackList will take care of removing 867 // the dead object for us. 868 } 869 } 870 wallpaper.callbacks.finishBroadcast(); 871 final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED); 872 mContext.sendBroadcast(intent); 873 } 874 875 private void checkPermission(String permission) { 876 if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) { 877 throw new SecurityException("Access denied to process: " + Binder.getCallingPid() 878 + ", must have permission " + permission); 879 } 880 } 881 882 private static JournaledFile makeJournaledFile(int userId) { 883 final String base = getWallpaperDir(userId) + "/" + WALLPAPER_INFO; 884 return new JournaledFile(new File(base), new File(base + ".tmp")); 885 } 886 887 private void saveSettingsLocked(WallpaperData wallpaper) { 888 JournaledFile journal = makeJournaledFile(wallpaper.userId); 889 FileOutputStream stream = null; 890 try { 891 stream = new FileOutputStream(journal.chooseForWrite(), false); 892 XmlSerializer out = new FastXmlSerializer(); 893 out.setOutput(stream, "utf-8"); 894 out.startDocument(null, true); 895 896 out.startTag(null, "wp"); 897 out.attribute(null, "width", Integer.toString(wallpaper.width)); 898 out.attribute(null, "height", Integer.toString(wallpaper.height)); 899 out.attribute(null, "name", wallpaper.name); 900 if (wallpaper.wallpaperComponent != null 901 && !wallpaper.wallpaperComponent.equals(wallpaper.imageWallpaperComponent)) { 902 out.attribute(null, "component", 903 wallpaper.wallpaperComponent.flattenToShortString()); 904 } 905 out.endTag(null, "wp"); 906 907 out.endDocument(); 908 stream.close(); 909 journal.commit(); 910 } catch (IOException e) { 911 try { 912 if (stream != null) { 913 stream.close(); 914 } 915 } catch (IOException ex) { 916 // Ignore 917 } 918 journal.rollback(); 919 } 920 } 921 922 private void migrateFromOld() { 923 File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY); 924 File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY); 925 if (oldWallpaper.exists()) { 926 File newWallpaper = new File(getWallpaperDir(0), WALLPAPER); 927 oldWallpaper.renameTo(newWallpaper); 928 } 929 if (oldInfo.exists()) { 930 File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO); 931 oldInfo.renameTo(newInfo); 932 } 933 } 934 935 private void loadSettingsLocked(int userId) { 936 if (DEBUG) Slog.v(TAG, "loadSettingsLocked"); 937 938 JournaledFile journal = makeJournaledFile(userId); 939 FileInputStream stream = null; 940 File file = journal.chooseForRead(); 941 if (!file.exists()) { 942 // This should only happen one time, when upgrading from a legacy system 943 migrateFromOld(); 944 } 945 WallpaperData wallpaper = mWallpaperMap.get(userId); 946 if (wallpaper == null) { 947 wallpaper = new WallpaperData(userId); 948 mWallpaperMap.put(userId, wallpaper); 949 } 950 boolean success = false; 951 try { 952 stream = new FileInputStream(file); 953 XmlPullParser parser = Xml.newPullParser(); 954 parser.setInput(stream, null); 955 956 int type; 957 do { 958 type = parser.next(); 959 if (type == XmlPullParser.START_TAG) { 960 String tag = parser.getName(); 961 if ("wp".equals(tag)) { 962 wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width")); 963 wallpaper.height = Integer.parseInt(parser 964 .getAttributeValue(null, "height")); 965 wallpaper.name = parser.getAttributeValue(null, "name"); 966 String comp = parser.getAttributeValue(null, "component"); 967 wallpaper.nextWallpaperComponent = comp != null 968 ? ComponentName.unflattenFromString(comp) 969 : null; 970 if (wallpaper.nextWallpaperComponent == null 971 || "android".equals(wallpaper.nextWallpaperComponent 972 .getPackageName())) { 973 wallpaper.nextWallpaperComponent = wallpaper.imageWallpaperComponent; 974 } 975 976 if (DEBUG) { 977 Slog.v(TAG, "mWidth:" + wallpaper.width); 978 Slog.v(TAG, "mHeight:" + wallpaper.height); 979 Slog.v(TAG, "mName:" + wallpaper.name); 980 Slog.v(TAG, "mNextWallpaperComponent:" 981 + wallpaper.nextWallpaperComponent); 982 } 983 } 984 } 985 } while (type != XmlPullParser.END_DOCUMENT); 986 success = true; 987 } catch (NullPointerException e) { 988 Slog.w(TAG, "failed parsing " + file + " " + e); 989 } catch (NumberFormatException e) { 990 Slog.w(TAG, "failed parsing " + file + " " + e); 991 } catch (XmlPullParserException e) { 992 Slog.w(TAG, "failed parsing " + file + " " + e); 993 } catch (IOException e) { 994 Slog.w(TAG, "failed parsing " + file + " " + e); 995 } catch (IndexOutOfBoundsException e) { 996 Slog.w(TAG, "failed parsing " + file + " " + e); 997 } 998 try { 999 if (stream != null) { 1000 stream.close(); 1001 } 1002 } catch (IOException e) { 1003 // Ignore 1004 } 1005 1006 if (!success) { 1007 wallpaper.width = -1; 1008 wallpaper.height = -1; 1009 wallpaper.name = ""; 1010 } 1011 1012 // We always want to have some reasonable width hint. 1013 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 1014 Display d = wm.getDefaultDisplay(); 1015 int baseSize = d.getMaximumSizeDimension(); 1016 if (wallpaper.width < baseSize) { 1017 wallpaper.width = baseSize; 1018 } 1019 if (wallpaper.height < baseSize) { 1020 wallpaper.height = baseSize; 1021 } 1022 } 1023 1024 // Called by SystemBackupAgent after files are restored to disk. 1025 void settingsRestored() { 1026 // TODO: If necessary, make it work for secondary users as well. This currently assumes 1027 // restores only to the primary user 1028 if (DEBUG) Slog.v(TAG, "settingsRestored"); 1029 WallpaperData wallpaper = null; 1030 boolean success = false; 1031 synchronized (mLock) { 1032 loadSettingsLocked(0); 1033 wallpaper = mWallpaperMap.get(0); 1034 if (wallpaper.nextWallpaperComponent != null 1035 && !wallpaper.nextWallpaperComponent.equals(wallpaper.imageWallpaperComponent)) { 1036 if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1037 wallpaper)) { 1038 // No such live wallpaper or other failure; fall back to the default 1039 // live wallpaper (since the profile being restored indicated that the 1040 // user had selected a live rather than static one). 1041 bindWallpaperComponentLocked(null, false, false, wallpaper); 1042 } 1043 success = true; 1044 } else { 1045 // If there's a wallpaper name, we use that. If that can't be loaded, then we 1046 // use the default. 1047 if ("".equals(wallpaper.name)) { 1048 if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty"); 1049 success = true; 1050 } else { 1051 if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource"); 1052 success = restoreNamedResourceLocked(wallpaper); 1053 } 1054 if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success); 1055 if (success) { 1056 bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 1057 wallpaper); 1058 } 1059 } 1060 } 1061 1062 if (!success) { 1063 Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'"); 1064 wallpaper.name = ""; 1065 getWallpaperDir(0).delete(); 1066 } 1067 1068 synchronized (mLock) { 1069 saveSettingsLocked(wallpaper); 1070 } 1071 } 1072 1073 boolean restoreNamedResourceLocked(WallpaperData wallpaper) { 1074 if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) { 1075 String resName = wallpaper.name.substring(4); 1076 1077 String pkg = null; 1078 int colon = resName.indexOf(':'); 1079 if (colon > 0) { 1080 pkg = resName.substring(0, colon); 1081 } 1082 1083 String ident = null; 1084 int slash = resName.lastIndexOf('/'); 1085 if (slash > 0) { 1086 ident = resName.substring(slash+1); 1087 } 1088 1089 String type = null; 1090 if (colon > 0 && slash > 0 && (slash-colon) > 1) { 1091 type = resName.substring(colon+1, slash); 1092 } 1093 1094 if (pkg != null && ident != null && type != null) { 1095 int resId = -1; 1096 InputStream res = null; 1097 FileOutputStream fos = null; 1098 try { 1099 Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED); 1100 Resources r = c.getResources(); 1101 resId = r.getIdentifier(resName, null, null); 1102 if (resId == 0) { 1103 Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type 1104 + " ident=" + ident); 1105 return false; 1106 } 1107 1108 res = r.openRawResource(resId); 1109 if (wallpaper.wallpaperFile.exists()) { 1110 wallpaper.wallpaperFile.delete(); 1111 } 1112 fos = new FileOutputStream(wallpaper.wallpaperFile); 1113 1114 byte[] buffer = new byte[32768]; 1115 int amt; 1116 while ((amt=res.read(buffer)) > 0) { 1117 fos.write(buffer, 0, amt); 1118 } 1119 // mWallpaperObserver will notice the close and send the change broadcast 1120 1121 Slog.v(TAG, "Restored wallpaper: " + resName); 1122 return true; 1123 } catch (NameNotFoundException e) { 1124 Slog.e(TAG, "Package name " + pkg + " not found"); 1125 } catch (Resources.NotFoundException e) { 1126 Slog.e(TAG, "Resource not found: " + resId); 1127 } catch (IOException e) { 1128 Slog.e(TAG, "IOException while restoring wallpaper ", e); 1129 } finally { 1130 if (res != null) { 1131 try { 1132 res.close(); 1133 } catch (IOException ex) {} 1134 } 1135 if (fos != null) { 1136 FileUtils.sync(fos); 1137 try { 1138 fos.close(); 1139 } catch (IOException ex) {} 1140 } 1141 } 1142 } 1143 } 1144 return false; 1145 } 1146 1147 @Override 1148 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1149 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1150 != PackageManager.PERMISSION_GRANTED) { 1151 1152 pw.println("Permission Denial: can't dump wallpaper service from from pid=" 1153 + Binder.getCallingPid() 1154 + ", uid=" + Binder.getCallingUid()); 1155 return; 1156 } 1157 1158 synchronized (mLock) { 1159 pw.println("Current Wallpaper Service state:"); 1160 for (int i = 0; i < mWallpaperMap.size(); i++) { 1161 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 1162 pw.println(" User " + wallpaper.userId + ":"); 1163 pw.print(" mWidth="); 1164 pw.print(wallpaper.width); 1165 pw.print(" mHeight="); 1166 pw.println(wallpaper.height); 1167 pw.print(" mName="); 1168 pw.println(wallpaper.name); 1169 pw.print(" mWallpaperComponent="); 1170 pw.println(wallpaper.wallpaperComponent); 1171 if (wallpaper.connection != null) { 1172 WallpaperConnection conn = wallpaper.connection; 1173 pw.print(" Wallpaper connection "); 1174 pw.print(conn); 1175 pw.println(":"); 1176 if (conn.mInfo != null) { 1177 pw.print(" mInfo.component="); 1178 pw.println(conn.mInfo.getComponent()); 1179 } 1180 pw.print(" mToken="); 1181 pw.println(conn.mToken); 1182 pw.print(" mService="); 1183 pw.println(conn.mService); 1184 pw.print(" mEngine="); 1185 pw.println(conn.mEngine); 1186 pw.print(" mLastDiedTime="); 1187 pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis()); 1188 } 1189 } 1190 } 1191 } 1192} 1193