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