WallpaperManagerService.java revision c613c63096d9c3e3da8c081210661007d2acf8fb
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.wallpaper; 18 19import static android.app.WallpaperManager.FLAG_LOCK; 20import static android.app.WallpaperManager.FLAG_SYSTEM; 21import static android.os.ParcelFileDescriptor.MODE_CREATE; 22import static android.os.ParcelFileDescriptor.MODE_READ_ONLY; 23import static android.os.ParcelFileDescriptor.MODE_READ_WRITE; 24import static android.os.ParcelFileDescriptor.MODE_TRUNCATE; 25 26import android.app.ActivityManager; 27import android.app.ActivityManagerNative; 28import android.app.AppGlobals; 29import android.app.AppOpsManager; 30import android.app.IUserSwitchObserver; 31import android.app.IWallpaperManager; 32import android.app.IWallpaperManagerCallback; 33import android.app.PendingIntent; 34import android.app.WallpaperInfo; 35import android.app.WallpaperManager; 36import android.app.admin.DevicePolicyManager; 37import android.app.backup.WallpaperBackupHelper; 38import android.content.BroadcastReceiver; 39import android.content.ComponentName; 40import android.content.Context; 41import android.content.Intent; 42import android.content.IntentFilter; 43import android.content.ServiceConnection; 44import android.content.pm.IPackageManager; 45import android.content.pm.PackageManager; 46import android.content.pm.PackageManager.NameNotFoundException; 47import android.content.pm.ResolveInfo; 48import android.content.pm.ServiceInfo; 49import android.content.pm.UserInfo; 50import android.content.res.Resources; 51import android.graphics.Bitmap; 52import android.graphics.BitmapFactory; 53import android.graphics.BitmapRegionDecoder; 54import android.graphics.Point; 55import android.graphics.Rect; 56import android.os.Binder; 57import android.os.Bundle; 58import android.os.Environment; 59import android.os.FileObserver; 60import android.os.FileUtils; 61import android.os.IBinder; 62import android.os.IRemoteCallback; 63import android.os.Process; 64import android.os.ParcelFileDescriptor; 65import android.os.RemoteCallbackList; 66import android.os.RemoteException; 67import android.os.SELinux; 68import android.os.ServiceManager; 69import android.os.SystemClock; 70import android.os.UserHandle; 71import android.os.UserManager; 72import android.service.wallpaper.IWallpaperConnection; 73import android.service.wallpaper.IWallpaperEngine; 74import android.service.wallpaper.IWallpaperService; 75import android.service.wallpaper.WallpaperService; 76import android.system.ErrnoException; 77import android.system.Os; 78import android.util.EventLog; 79import android.util.Slog; 80import android.util.SparseArray; 81import android.util.Xml; 82import android.view.Display; 83import android.view.IWindowManager; 84import android.view.WindowManager; 85 86import com.android.internal.R; 87import com.android.internal.content.PackageMonitor; 88import com.android.internal.os.BackgroundThread; 89import com.android.internal.util.FastXmlSerializer; 90import com.android.internal.util.JournaledFile; 91import com.android.server.EventLogTags; 92import com.android.server.SystemService; 93 94import libcore.io.IoUtils; 95 96import org.xmlpull.v1.XmlPullParser; 97import org.xmlpull.v1.XmlPullParserException; 98import org.xmlpull.v1.XmlSerializer; 99 100import java.io.BufferedOutputStream; 101import java.io.File; 102import java.io.FileDescriptor; 103import java.io.FileInputStream; 104import java.io.FileNotFoundException; 105import java.io.FileOutputStream; 106import java.io.IOException; 107import java.io.InputStream; 108import java.io.PrintWriter; 109import java.nio.charset.StandardCharsets; 110import java.util.Arrays; 111import java.util.List; 112 113public class WallpaperManagerService extends IWallpaperManager.Stub { 114 static final String TAG = "WallpaperManagerService"; 115 static final boolean DEBUG = false; 116 117 public static class Lifecycle extends SystemService { 118 private WallpaperManagerService mService; 119 120 public Lifecycle(Context context) { 121 super(context); 122 } 123 124 @Override 125 public void onStart() { 126 mService = new WallpaperManagerService(getContext()); 127 publishBinderService(Context.WALLPAPER_SERVICE, mService); 128 } 129 130 @Override 131 public void onBootPhase(int phase) { 132 if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) { 133 mService.systemReady(); 134 } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) { 135 mService.switchUser(UserHandle.USER_SYSTEM, null); 136 } 137 } 138 139 @Override 140 public void onUnlockUser(int userHandle) { 141 mService.onUnlockUser(userHandle); 142 } 143 } 144 145 final Object mLock = new Object(); 146 147 /** 148 * Minimum time between crashes of a wallpaper service for us to consider 149 * restarting it vs. just reverting to the static wallpaper. 150 */ 151 static final long MIN_WALLPAPER_CRASH_TIME = 10000; 152 static final int MAX_WALLPAPER_COMPONENT_LOG_LENGTH = 128; 153 static final String WALLPAPER = "wallpaper_orig"; 154 static final String WALLPAPER_CROP = "wallpaper"; 155 static final String WALLPAPER_LOCK_ORIG = "wallpaper_lock_orig"; 156 static final String WALLPAPER_LOCK_CROP = "wallpaper_lock"; 157 static final String WALLPAPER_INFO = "wallpaper_info.xml"; 158 159 // All the various per-user state files we need to be aware of 160 static final String[] sPerUserFiles = new String[] { 161 WALLPAPER, WALLPAPER_CROP, 162 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP, 163 WALLPAPER_INFO 164 }; 165 166 /** 167 * Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks 168 * that the wallpaper has changed. The CREATE is triggered when there is no 169 * wallpaper set and is created for the first time. The CLOSE_WRITE is triggered 170 * every time the wallpaper is changed. 171 */ 172 private class WallpaperObserver extends FileObserver { 173 174 final int mUserId; 175 final WallpaperData mWallpaper; 176 final File mWallpaperDir; 177 final File mWallpaperFile; 178 final File mWallpaperLockFile; 179 180 public WallpaperObserver(WallpaperData wallpaper) { 181 super(getWallpaperDir(wallpaper.userId).getAbsolutePath(), 182 CLOSE_WRITE | MOVED_TO | DELETE | DELETE_SELF); 183 mUserId = wallpaper.userId; 184 mWallpaperDir = getWallpaperDir(wallpaper.userId); 185 mWallpaper = wallpaper; 186 mWallpaperFile = new File(mWallpaperDir, WALLPAPER); 187 mWallpaperLockFile = new File(mWallpaperDir, WALLPAPER_LOCK_ORIG); 188 } 189 190 private WallpaperData dataForEvent(boolean sysChanged, boolean lockChanged) { 191 WallpaperData wallpaper = null; 192 synchronized (mLock) { 193 if (lockChanged) { 194 wallpaper = mLockWallpaperMap.get(mUserId); 195 } 196 if (wallpaper == null) { 197 // no lock-specific wallpaper exists, or sys case, handled together 198 wallpaper = mWallpaperMap.get(mUserId); 199 } 200 } 201 return (wallpaper != null) ? wallpaper : mWallpaper; 202 } 203 204 @Override 205 public void onEvent(int event, String path) { 206 if (path == null) { 207 return; 208 } 209 final boolean moved = (event == MOVED_TO); 210 final boolean written = (event == CLOSE_WRITE || moved); 211 final File changedFile = new File(mWallpaperDir, path); 212 213 // System and system+lock changes happen on the system wallpaper input file; 214 // lock-only changes happen on the dedicated lock wallpaper input file 215 final boolean sysWallpaperChanged = (mWallpaperFile.equals(changedFile)); 216 final boolean lockWallpaperChanged = (mWallpaperLockFile.equals(changedFile)); 217 WallpaperData wallpaper = dataForEvent(sysWallpaperChanged, lockWallpaperChanged); 218 219 if (DEBUG) { 220 Slog.v(TAG, "Wallpaper file change: evt=" + event 221 + " path=" + path 222 + " sys=" + sysWallpaperChanged 223 + " lock=" + lockWallpaperChanged 224 + " imagePending=" + wallpaper.imageWallpaperPending 225 + " whichPending=0x" + Integer.toHexString(wallpaper.whichPending) 226 + " written=" + written); 227 } 228 229 if (moved && lockWallpaperChanged) { 230 // We just migrated sys -> lock to preserve imagery for an impending 231 // new system-only wallpaper. Tell keyguard about it and make sure it 232 // has the right SELinux label. 233 if (DEBUG) { 234 Slog.i(TAG, "Sys -> lock MOVED_TO"); 235 } 236 SELinux.restorecon(changedFile); 237 notifyLockWallpaperChanged(); 238 return; 239 } 240 241 synchronized (mLock) { 242 if (sysWallpaperChanged || lockWallpaperChanged) { 243 notifyCallbacksLocked(wallpaper); 244 if (wallpaper.wallpaperComponent == null 245 || event != CLOSE_WRITE // includes the MOVED_TO case 246 || wallpaper.imageWallpaperPending) { 247 if (written) { 248 // The image source has finished writing the source image, 249 // so we now produce the crop rect (in the background), and 250 // only publish the new displayable (sub)image as a result 251 // of that work. 252 if (DEBUG) { 253 Slog.v(TAG, "Wallpaper written; generating crop"); 254 } 255 SELinux.restorecon(changedFile); 256 if (moved) { 257 // This is a restore, so generate the crop using any just-restored new 258 // crop guidelines, making sure to preserve our local dimension hints. 259 // We also make sure to reapply the correct SELinux label. 260 if (DEBUG) { 261 Slog.v(TAG, "moved-to, therefore restore; reloading metadata"); 262 } 263 loadSettingsLocked(wallpaper.userId, true); 264 } 265 generateCrop(wallpaper); 266 if (DEBUG) { 267 Slog.v(TAG, "Crop done; invoking completion callback"); 268 } 269 wallpaper.imageWallpaperPending = false; 270 if (wallpaper.setComplete != null) { 271 try { 272 wallpaper.setComplete.onWallpaperChanged(); 273 } catch (RemoteException e) { 274 // if this fails we don't really care; the setting app may just 275 // have crashed and that sort of thing is a fact of life. 276 } 277 } 278 if (sysWallpaperChanged) { 279 // If this was the system wallpaper, rebind... 280 bindWallpaperComponentLocked(mImageWallpaper, true, 281 false, wallpaper, null); 282 } 283 if (lockWallpaperChanged 284 || (wallpaper.whichPending & FLAG_LOCK) != 0) { 285 if (DEBUG) { 286 Slog.i(TAG, "Lock-relevant wallpaper changed"); 287 } 288 // either a lock-only wallpaper commit or a system+lock event. 289 // if it's system-plus-lock we need to wipe the lock bookkeeping; 290 // we're falling back to displaying the system wallpaper there. 291 if (!lockWallpaperChanged) { 292 mLockWallpaperMap.remove(wallpaper.userId); 293 } 294 // and in any case, tell keyguard about it 295 notifyLockWallpaperChanged(); 296 } 297 saveSettingsLocked(wallpaper.userId); 298 } 299 } 300 } 301 } 302 } 303 } 304 305 void notifyLockWallpaperChanged() { 306 final IWallpaperManagerCallback cb = mKeyguardListener; 307 if (cb != null) { 308 try { 309 cb.onWallpaperChanged(); 310 } catch (RemoteException e) { 311 // Oh well it went away; no big deal 312 } 313 } 314 } 315 316 /** 317 * Once a new wallpaper has been written via setWallpaper(...), it needs to be cropped 318 * for display. 319 */ 320 private void generateCrop(WallpaperData wallpaper) { 321 boolean success = false; 322 323 Rect cropHint = new Rect(wallpaper.cropHint); 324 325 if (DEBUG) { 326 Slog.v(TAG, "Generating crop for new wallpaper(s): 0x" 327 + Integer.toHexString(wallpaper.whichPending) 328 + " to " + wallpaper.cropFile.getName() 329 + " crop=(" + cropHint.width() + 'x' + cropHint.height() 330 + ") dim=(" + wallpaper.width + 'x' + wallpaper.height + ')'); 331 } 332 333 // Analyse the source; needed in multiple cases 334 BitmapFactory.Options options = new BitmapFactory.Options(); 335 options.inJustDecodeBounds = true; 336 BitmapFactory.decodeFile(wallpaper.wallpaperFile.getAbsolutePath(), options); 337 if (options.outWidth <= 0 || options.outHeight <= 0) { 338 Slog.e(TAG, "Invalid wallpaper data"); 339 success = false; 340 } else { 341 boolean needCrop = false; 342 boolean needScale = false; 343 344 // Empty crop means use the full image 345 if (cropHint.isEmpty()) { 346 cropHint.left = cropHint.top = 0; 347 cropHint.right = options.outWidth; 348 cropHint.bottom = options.outHeight; 349 } else { 350 // force the crop rect to lie within the measured bounds 351 cropHint.offset( 352 (cropHint.right > options.outWidth ? options.outWidth - cropHint.right : 0), 353 (cropHint.bottom > options.outHeight ? options.outHeight - cropHint.bottom : 0)); 354 355 // Don't bother cropping if what we're left with is identity 356 needCrop = (options.outHeight > cropHint.height() 357 && options.outWidth > cropHint.width()); 358 } 359 360 // scale if the crop height winds up not matching the recommended metrics 361 needScale = (wallpaper.height != cropHint.height()); 362 363 if (DEBUG) { 364 Slog.v(TAG, "crop: w=" + cropHint.width() + " h=" + cropHint.height()); 365 Slog.v(TAG, "dims: w=" + wallpaper.width + " h=" + wallpaper.height); 366 Slog.v(TAG, "meas: w=" + options.outWidth + " h=" + options.outHeight); 367 Slog.v(TAG, "crop?=" + needCrop + " scale?=" + needScale); 368 } 369 370 if (!needCrop && !needScale) { 371 // Simple case: the nominal crop fits what we want, so we take 372 // the whole thing and just copy the image file directly. 373 if (DEBUG) { 374 Slog.v(TAG, "Null crop of new wallpaper; copying"); 375 } 376 success = FileUtils.copyFile(wallpaper.wallpaperFile, wallpaper.cropFile); 377 if (!success) { 378 wallpaper.cropFile.delete(); 379 // TODO: fall back to default wallpaper in this case 380 } 381 } else { 382 // Fancy case: crop and scale. First, we decode and scale down if appropriate. 383 FileOutputStream f = null; 384 BufferedOutputStream bos = null; 385 try { 386 BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance( 387 wallpaper.wallpaperFile.getAbsolutePath(), false); 388 389 // This actually downsamples only by powers of two, but that's okay; we do 390 // a proper scaling blit later. This is to minimize transient RAM use. 391 // We calculate the largest power-of-two under the actual ratio rather than 392 // just let the decode take care of it because we also want to remap where the 393 // cropHint rectangle lies in the decoded [super]rect. 394 final BitmapFactory.Options scaler; 395 final int actualScale = cropHint.height() / wallpaper.height; 396 int scale = 1; 397 while (2*scale < actualScale) { 398 scale *= 2; 399 } 400 if (scale > 1) { 401 scaler = new BitmapFactory.Options(); 402 scaler.inSampleSize = scale; 403 if (DEBUG) { 404 Slog.v(TAG, "Downsampling cropped rect with scale " + scale); 405 } 406 } else { 407 scaler = null; 408 } 409 Bitmap cropped = decoder.decodeRegion(cropHint, scaler); 410 decoder.recycle(); 411 412 if (cropped == null) { 413 Slog.e(TAG, "Could not decode new wallpaper"); 414 } else { 415 // We've got the extracted crop; now we want to scale it properly to 416 // the desired rectangle. That's a height-biased operation: make it 417 // fit the hinted height, and accept whatever width we end up with. 418 cropHint.offsetTo(0, 0); 419 cropHint.right /= scale; // adjust by downsampling factor 420 cropHint.bottom /= scale; 421 final float heightR = ((float)wallpaper.height) / ((float)cropHint.height()); 422 if (DEBUG) { 423 Slog.v(TAG, "scale " + heightR + ", extracting " + cropHint); 424 } 425 final int destWidth = (int)(cropHint.width() * heightR); 426 final Bitmap finalCrop = Bitmap.createScaledBitmap(cropped, 427 destWidth, wallpaper.height, true); 428 if (DEBUG) { 429 Slog.v(TAG, "Final extract:"); 430 Slog.v(TAG, " dims: w=" + wallpaper.width 431 + " h=" + wallpaper.height); 432 Slog.v(TAG, " out: w=" + finalCrop.getWidth() 433 + " h=" + finalCrop.getHeight()); 434 } 435 436 f = new FileOutputStream(wallpaper.cropFile); 437 bos = new BufferedOutputStream(f, 32*1024); 438 finalCrop.compress(Bitmap.CompressFormat.JPEG, 100, bos); 439 bos.flush(); // don't rely on the implicit flush-at-close when noting success 440 success = true; 441 } 442 } catch (Exception e) { 443 if (DEBUG) { 444 Slog.e(TAG, "Error decoding crop", e); 445 } 446 } finally { 447 IoUtils.closeQuietly(bos); 448 IoUtils.closeQuietly(f); 449 } 450 } 451 } 452 453 if (!success) { 454 Slog.e(TAG, "Unable to apply new wallpaper"); 455 wallpaper.cropFile.delete(); 456 } 457 458 if (wallpaper.cropFile.exists()) { 459 boolean didRestorecon = SELinux.restorecon(wallpaper.cropFile.getAbsoluteFile()); 460 if (DEBUG) { 461 Slog.v(TAG, "restorecon() of crop file returned " + didRestorecon); 462 } 463 } 464 } 465 466 final Context mContext; 467 final IWindowManager mIWindowManager; 468 final IPackageManager mIPackageManager; 469 final MyPackageMonitor mMonitor; 470 final AppOpsManager mAppOpsManager; 471 WallpaperData mLastWallpaper; 472 IWallpaperManagerCallback mKeyguardListener; 473 boolean mWaitingForUnlock; 474 475 /** 476 * ID of the current wallpaper, changed every time anything sets a wallpaper. 477 * This is used for external detection of wallpaper update activity. 478 */ 479 int mWallpaperId; 480 481 /** 482 * Name of the component used to display bitmap wallpapers from either the gallery or 483 * built-in wallpapers. 484 */ 485 final ComponentName mImageWallpaper; 486 487 final SparseArray<WallpaperData> mWallpaperMap = new SparseArray<WallpaperData>(); 488 final SparseArray<WallpaperData> mLockWallpaperMap = new SparseArray<WallpaperData>(); 489 490 final SparseArray<Boolean> mUserRestorecon = new SparseArray<Boolean>(); 491 int mCurrentUserId; 492 493 static class WallpaperData { 494 495 int userId; 496 497 final File wallpaperFile; // source image 498 final File cropFile; // eventual destination 499 500 /** 501 * True while the client is writing a new wallpaper 502 */ 503 boolean imageWallpaperPending; 504 505 /** 506 * Which new wallpapers are being written; mirrors the 'which' 507 * selector bit field to setWallpaper(). 508 */ 509 int whichPending; 510 511 /** 512 * Callback once the set + crop is finished 513 */ 514 IWallpaperManagerCallback setComplete; 515 516 /** 517 * Is the OS allowed to back up this wallpaper imagery? 518 */ 519 boolean allowBackup; 520 521 /** 522 * Resource name if using a picture from the wallpaper gallery 523 */ 524 String name = ""; 525 526 /** 527 * The component name of the currently set live wallpaper. 528 */ 529 ComponentName wallpaperComponent; 530 531 /** 532 * The component name of the wallpaper that should be set next. 533 */ 534 ComponentName nextWallpaperComponent; 535 536 /** 537 * The ID of this wallpaper 538 */ 539 int wallpaperId; 540 541 WallpaperConnection connection; 542 long lastDiedTime; 543 boolean wallpaperUpdating; 544 WallpaperObserver wallpaperObserver; 545 546 /** 547 * List of callbacks registered they should each be notified when the wallpaper is changed. 548 */ 549 private RemoteCallbackList<IWallpaperManagerCallback> callbacks 550 = new RemoteCallbackList<IWallpaperManagerCallback>(); 551 552 int width = -1; 553 int height = -1; 554 555 /** 556 * The crop hint supplied for displaying a subset of the source image 557 */ 558 final Rect cropHint = new Rect(0, 0, 0, 0); 559 560 final Rect padding = new Rect(0, 0, 0, 0); 561 562 WallpaperData(int userId, String inputFileName, String cropFileName) { 563 this.userId = userId; 564 final File wallpaperDir = getWallpaperDir(userId); 565 wallpaperFile = new File(wallpaperDir, inputFileName); 566 cropFile = new File(wallpaperDir, cropFileName); 567 } 568 569 // Called during initialization of a given user's wallpaper bookkeeping 570 boolean cropExists() { 571 return cropFile.exists(); 572 } 573 } 574 575 int makeWallpaperIdLocked() { 576 do { 577 ++mWallpaperId; 578 } while (mWallpaperId == 0); 579 return mWallpaperId; 580 } 581 582 class WallpaperConnection extends IWallpaperConnection.Stub 583 implements ServiceConnection { 584 final WallpaperInfo mInfo; 585 final Binder mToken = new Binder(); 586 IWallpaperService mService; 587 IWallpaperEngine mEngine; 588 WallpaperData mWallpaper; 589 IRemoteCallback mReply; 590 591 boolean mDimensionsChanged = false; 592 boolean mPaddingChanged = false; 593 594 public WallpaperConnection(WallpaperInfo info, WallpaperData wallpaper) { 595 mInfo = info; 596 mWallpaper = wallpaper; 597 } 598 599 @Override 600 public void onServiceConnected(ComponentName name, IBinder service) { 601 synchronized (mLock) { 602 if (mWallpaper.connection == this) { 603 mService = IWallpaperService.Stub.asInterface(service); 604 attachServiceLocked(this, mWallpaper); 605 // XXX should probably do saveSettingsLocked() later 606 // when we have an engine, but I'm not sure about 607 // locking there and anyway we always need to be able to 608 // recover if there is something wrong. 609 saveSettingsLocked(mWallpaper.userId); 610 } 611 } 612 } 613 614 @Override 615 public void onServiceDisconnected(ComponentName name) { 616 synchronized (mLock) { 617 mService = null; 618 mEngine = null; 619 if (mWallpaper.connection == this) { 620 Slog.w(TAG, "Wallpaper service gone: " + mWallpaper.wallpaperComponent); 621 if (!mWallpaper.wallpaperUpdating 622 && mWallpaper.userId == mCurrentUserId) { 623 // There is a race condition which causes 624 // {@link #mWallpaper.wallpaperUpdating} to be false even if it is 625 // currently updating since the broadcast notifying us is async. 626 // This race is overcome by the general rule that we only reset the 627 // wallpaper if its service was shut down twice 628 // during {@link #MIN_WALLPAPER_CRASH_TIME} millis. 629 if (mWallpaper.lastDiedTime != 0 630 && mWallpaper.lastDiedTime + MIN_WALLPAPER_CRASH_TIME 631 > SystemClock.uptimeMillis()) { 632 Slog.w(TAG, "Reverting to built-in wallpaper!"); 633 clearWallpaperLocked(true, FLAG_SYSTEM, mWallpaper.userId, null); 634 } else { 635 mWallpaper.lastDiedTime = SystemClock.uptimeMillis(); 636 } 637 final String flattened = name.flattenToString(); 638 EventLog.writeEvent(EventLogTags.WP_WALLPAPER_CRASHED, 639 flattened.substring(0, Math.min(flattened.length(), 640 MAX_WALLPAPER_COMPONENT_LOG_LENGTH))); 641 } 642 } 643 } 644 } 645 646 @Override 647 public void attachEngine(IWallpaperEngine engine) { 648 synchronized (mLock) { 649 mEngine = engine; 650 if (mDimensionsChanged) { 651 try { 652 mEngine.setDesiredSize(mWallpaper.width, mWallpaper.height); 653 } catch (RemoteException e) { 654 Slog.w(TAG, "Failed to set wallpaper dimensions", e); 655 } 656 mDimensionsChanged = false; 657 } 658 if (mPaddingChanged) { 659 try { 660 mEngine.setDisplayPadding(mWallpaper.padding); 661 } catch (RemoteException e) { 662 Slog.w(TAG, "Failed to set wallpaper padding", e); 663 } 664 mPaddingChanged = false; 665 } 666 } 667 } 668 669 @Override 670 public void engineShown(IWallpaperEngine engine) { 671 synchronized (mLock) { 672 if (mReply != null) { 673 long ident = Binder.clearCallingIdentity(); 674 try { 675 mReply.sendResult(null); 676 } catch (RemoteException e) { 677 Binder.restoreCallingIdentity(ident); 678 } 679 mReply = null; 680 } 681 } 682 } 683 684 @Override 685 public ParcelFileDescriptor setWallpaper(String name) { 686 synchronized (mLock) { 687 if (mWallpaper.connection == this) { 688 return updateWallpaperBitmapLocked(name, mWallpaper, null); 689 } 690 return null; 691 } 692 } 693 } 694 695 class MyPackageMonitor extends PackageMonitor { 696 @Override 697 public void onPackageUpdateFinished(String packageName, int uid) { 698 synchronized (mLock) { 699 if (mCurrentUserId != getChangingUserId()) { 700 return; 701 } 702 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 703 if (wallpaper != null) { 704 if (wallpaper.wallpaperComponent != null 705 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 706 wallpaper.wallpaperUpdating = false; 707 ComponentName comp = wallpaper.wallpaperComponent; 708 clearWallpaperComponentLocked(wallpaper); 709 if (!bindWallpaperComponentLocked(comp, false, false, 710 wallpaper, null)) { 711 Slog.w(TAG, "Wallpaper no longer available; reverting to default"); 712 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 713 } 714 } 715 } 716 } 717 } 718 719 @Override 720 public void onPackageModified(String packageName) { 721 synchronized (mLock) { 722 if (mCurrentUserId != getChangingUserId()) { 723 return; 724 } 725 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 726 if (wallpaper != null) { 727 if (wallpaper.wallpaperComponent == null 728 || !wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 729 return; 730 } 731 doPackagesChangedLocked(true, wallpaper); 732 } 733 } 734 } 735 736 @Override 737 public void onPackageUpdateStarted(String packageName, int uid) { 738 synchronized (mLock) { 739 if (mCurrentUserId != getChangingUserId()) { 740 return; 741 } 742 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 743 if (wallpaper != null) { 744 if (wallpaper.wallpaperComponent != null 745 && wallpaper.wallpaperComponent.getPackageName().equals(packageName)) { 746 wallpaper.wallpaperUpdating = true; 747 } 748 } 749 } 750 } 751 752 @Override 753 public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { 754 synchronized (mLock) { 755 boolean changed = false; 756 if (mCurrentUserId != getChangingUserId()) { 757 return false; 758 } 759 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 760 if (wallpaper != null) { 761 boolean res = doPackagesChangedLocked(doit, wallpaper); 762 changed |= res; 763 } 764 return changed; 765 } 766 } 767 768 @Override 769 public void onSomePackagesChanged() { 770 synchronized (mLock) { 771 if (mCurrentUserId != getChangingUserId()) { 772 return; 773 } 774 WallpaperData wallpaper = mWallpaperMap.get(mCurrentUserId); 775 if (wallpaper != null) { 776 doPackagesChangedLocked(true, wallpaper); 777 } 778 } 779 } 780 781 boolean doPackagesChangedLocked(boolean doit, WallpaperData wallpaper) { 782 boolean changed = false; 783 if (wallpaper.wallpaperComponent != null) { 784 int change = isPackageDisappearing(wallpaper.wallpaperComponent 785 .getPackageName()); 786 if (change == PACKAGE_PERMANENT_CHANGE 787 || change == PACKAGE_TEMPORARY_CHANGE) { 788 changed = true; 789 if (doit) { 790 Slog.w(TAG, "Wallpaper uninstalled, removing: " 791 + wallpaper.wallpaperComponent); 792 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 793 } 794 } 795 } 796 if (wallpaper.nextWallpaperComponent != null) { 797 int change = isPackageDisappearing(wallpaper.nextWallpaperComponent 798 .getPackageName()); 799 if (change == PACKAGE_PERMANENT_CHANGE 800 || change == PACKAGE_TEMPORARY_CHANGE) { 801 wallpaper.nextWallpaperComponent = null; 802 } 803 } 804 if (wallpaper.wallpaperComponent != null 805 && isPackageModified(wallpaper.wallpaperComponent.getPackageName())) { 806 try { 807 mContext.getPackageManager().getServiceInfo(wallpaper.wallpaperComponent, 808 PackageManager.MATCH_DIRECT_BOOT_AWARE 809 | PackageManager.MATCH_DIRECT_BOOT_UNAWARE); 810 } catch (NameNotFoundException e) { 811 Slog.w(TAG, "Wallpaper component gone, removing: " 812 + wallpaper.wallpaperComponent); 813 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, null); 814 } 815 } 816 if (wallpaper.nextWallpaperComponent != null 817 && isPackageModified(wallpaper.nextWallpaperComponent.getPackageName())) { 818 try { 819 mContext.getPackageManager().getServiceInfo(wallpaper.nextWallpaperComponent, 820 PackageManager.MATCH_DIRECT_BOOT_AWARE 821 | PackageManager.MATCH_DIRECT_BOOT_UNAWARE); 822 } catch (NameNotFoundException e) { 823 wallpaper.nextWallpaperComponent = null; 824 } 825 } 826 return changed; 827 } 828 } 829 830 public WallpaperManagerService(Context context) { 831 if (DEBUG) Slog.v(TAG, "WallpaperService startup"); 832 mContext = context; 833 mImageWallpaper = ComponentName.unflattenFromString( 834 context.getResources().getString(R.string.image_wallpaper_component)); 835 mIWindowManager = IWindowManager.Stub.asInterface( 836 ServiceManager.getService(Context.WINDOW_SERVICE)); 837 mIPackageManager = AppGlobals.getPackageManager(); 838 mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE); 839 mMonitor = new MyPackageMonitor(); 840 mMonitor.register(context, null, UserHandle.ALL, true); 841 getWallpaperDir(UserHandle.USER_SYSTEM).mkdirs(); 842 loadSettingsLocked(UserHandle.USER_SYSTEM, false); 843 } 844 845 private static File getWallpaperDir(int userId) { 846 return Environment.getUserSystemDirectory(userId); 847 } 848 849 @Override 850 protected void finalize() throws Throwable { 851 super.finalize(); 852 for (int i = 0; i < mWallpaperMap.size(); i++) { 853 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 854 wallpaper.wallpaperObserver.stopWatching(); 855 } 856 } 857 858 void systemReady() { 859 if (DEBUG) Slog.v(TAG, "systemReady"); 860 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.USER_SYSTEM); 861 // If we think we're going to be using the system image wallpaper imagery, make 862 // sure we have something to render 863 if (mImageWallpaper.equals(wallpaper.nextWallpaperComponent)) { 864 // No crop file? Make sure we've finished the processing sequence if necessary 865 if (!wallpaper.cropExists()) { 866 if (DEBUG) { 867 Slog.i(TAG, "No crop; regenerating from source"); 868 } 869 generateCrop(wallpaper); 870 } 871 // Still nothing? Fall back to default. 872 if (!wallpaper.cropExists()) { 873 if (DEBUG) { 874 Slog.i(TAG, "Unable to regenerate crop; resetting"); 875 } 876 clearWallpaperLocked(false, FLAG_SYSTEM, UserHandle.USER_SYSTEM, null); 877 } 878 } else { 879 if (DEBUG) { 880 Slog.i(TAG, "Nondefault wallpaper component; gracefully ignoring"); 881 } 882 } 883 884 IntentFilter userFilter = new IntentFilter(); 885 userFilter.addAction(Intent.ACTION_USER_REMOVED); 886 mContext.registerReceiver(new BroadcastReceiver() { 887 @Override 888 public void onReceive(Context context, Intent intent) { 889 final String action = intent.getAction(); 890 if (Intent.ACTION_USER_REMOVED.equals(action)) { 891 onRemoveUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 892 UserHandle.USER_NULL)); 893 } 894 } 895 }, userFilter); 896 897 try { 898 ActivityManagerNative.getDefault().registerUserSwitchObserver( 899 new IUserSwitchObserver.Stub() { 900 @Override 901 public void onUserSwitching(int newUserId, IRemoteCallback reply) { 902 switchUser(newUserId, reply); 903 } 904 905 @Override 906 public void onUserSwitchComplete(int newUserId) throws RemoteException { 907 } 908 909 @Override 910 public void onForegroundProfileSwitch(int newProfileId) { 911 // Ignore. 912 } 913 }, TAG); 914 } catch (RemoteException e) { 915 e.rethrowAsRuntimeException(); 916 } 917 } 918 919 /** Called by SystemBackupAgent */ 920 public String getName() { 921 // Verify caller is the system 922 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 923 throw new RuntimeException("getName() can only be called from the system process"); 924 } 925 synchronized (mLock) { 926 return mWallpaperMap.get(0).name; 927 } 928 } 929 930 void stopObserver(WallpaperData wallpaper) { 931 if (wallpaper != null) { 932 if (wallpaper.wallpaperObserver != null) { 933 wallpaper.wallpaperObserver.stopWatching(); 934 wallpaper.wallpaperObserver = null; 935 } 936 } 937 } 938 939 void stopObserversLocked(int userId) { 940 stopObserver(mWallpaperMap.get(userId)); 941 stopObserver(mLockWallpaperMap.get(userId)); 942 mWallpaperMap.remove(userId); 943 mLockWallpaperMap.remove(userId); 944 } 945 946 void onUnlockUser(final int userId) { 947 synchronized (mLock) { 948 if (mCurrentUserId == userId) { 949 if (mWaitingForUnlock) { 950 // If we're switching users, now is when we transition the wallpaper 951 switchUser(userId, null); 952 } 953 954 // Make sure that the SELinux labeling of all the relevant files is correct. 955 // This corrects for mislabeling bugs that might have arisen from move-to 956 // operations involving the wallpaper files. This isn't timing-critical, 957 // so we do it in the background to avoid holding up the user unlock operation. 958 if (mUserRestorecon.get(userId) != Boolean.TRUE) { 959 mUserRestorecon.put(userId, Boolean.TRUE); 960 Runnable relabeler = new Runnable() { 961 @Override 962 public void run() { 963 final File wallpaperDir = getWallpaperDir(userId); 964 for (String filename : sPerUserFiles) { 965 File f = new File(wallpaperDir, filename); 966 if (f.exists()) { 967 SELinux.restorecon(f); 968 } 969 } 970 } 971 }; 972 BackgroundThread.getHandler().post(relabeler); 973 } 974 } 975 } 976 } 977 978 void onRemoveUser(int userId) { 979 if (userId < 1) return; 980 981 final File wallpaperDir = getWallpaperDir(userId); 982 synchronized (mLock) { 983 stopObserversLocked(userId); 984 for (String filename : sPerUserFiles) { 985 new File(wallpaperDir, filename).delete(); 986 } 987 } 988 } 989 990 void switchUser(int userId, IRemoteCallback reply) { 991 synchronized (mLock) { 992 mCurrentUserId = userId; 993 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 994 // Not started watching yet, in case wallpaper data was loaded for other reasons. 995 if (wallpaper.wallpaperObserver == null) { 996 wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper); 997 wallpaper.wallpaperObserver.startWatching(); 998 } 999 switchWallpaper(wallpaper, reply); 1000 } 1001 } 1002 1003 void switchWallpaper(WallpaperData wallpaper, IRemoteCallback reply) { 1004 synchronized (mLock) { 1005 mWaitingForUnlock = false; 1006 final ComponentName cname = wallpaper.wallpaperComponent != null ? 1007 wallpaper.wallpaperComponent : wallpaper.nextWallpaperComponent; 1008 if (!bindWallpaperComponentLocked(cname, true, false, wallpaper, reply)) { 1009 // We failed to bind the desired wallpaper, but that might 1010 // happen if the wallpaper isn't direct-boot aware 1011 ServiceInfo si = null; 1012 try { 1013 si = mIPackageManager.getServiceInfo(cname, 1014 PackageManager.MATCH_DIRECT_BOOT_UNAWARE, wallpaper.userId); 1015 } catch (RemoteException ignored) { 1016 } 1017 1018 if (si == null) { 1019 Slog.w(TAG, "Failure starting previous wallpaper; clearing"); 1020 clearWallpaperLocked(false, FLAG_SYSTEM, wallpaper.userId, reply); 1021 } else { 1022 Slog.w(TAG, "Wallpaper isn't direct boot aware; using fallback until unlocked"); 1023 // We might end up persisting the current wallpaper data 1024 // while locked, so pretend like the component was actually 1025 // bound into place 1026 wallpaper.wallpaperComponent = wallpaper.nextWallpaperComponent; 1027 final WallpaperData fallback = new WallpaperData(wallpaper.userId, 1028 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1029 ensureSaneWallpaperData(fallback); 1030 bindWallpaperComponentLocked(mImageWallpaper, true, false, fallback, reply); 1031 mWaitingForUnlock = true; 1032 } 1033 } 1034 } 1035 } 1036 1037 @Override 1038 public void clearWallpaper(String callingPackage, int which, int userId) { 1039 if (DEBUG) Slog.v(TAG, "clearWallpaper"); 1040 checkPermission(android.Manifest.permission.SET_WALLPAPER); 1041 if (!isWallpaperSupported(callingPackage) || !isSetWallpaperAllowed(callingPackage)) { 1042 return; 1043 } 1044 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1045 Binder.getCallingUid(), userId, false, true, "clearWallpaper", null); 1046 1047 synchronized (mLock) { 1048 clearWallpaperLocked(false, which, userId, null); 1049 } 1050 } 1051 1052 void clearWallpaperLocked(boolean defaultFailed, int which, int userId, IRemoteCallback reply) { 1053 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1054 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper to read"); 1055 } 1056 1057 WallpaperData wallpaper = null; 1058 if (which == FLAG_LOCK) { 1059 wallpaper = mLockWallpaperMap.get(userId); 1060 if (wallpaper == null) { 1061 // It's already gone; we're done. 1062 if (DEBUG) { 1063 Slog.i(TAG, "Lock wallpaper already cleared"); 1064 } 1065 return; 1066 } 1067 } else { 1068 wallpaper = mWallpaperMap.get(userId); 1069 if (wallpaper == null) { 1070 // Might need to bring it in the first time to establish our rewrite 1071 loadSettingsLocked(userId, false); 1072 wallpaper = mWallpaperMap.get(userId); 1073 } 1074 } 1075 if (wallpaper == null) { 1076 return; 1077 } 1078 1079 final long ident = Binder.clearCallingIdentity(); 1080 try { 1081 if (wallpaper.wallpaperFile.exists()) { 1082 wallpaper.wallpaperFile.delete(); 1083 wallpaper.cropFile.delete(); 1084 if (which == FLAG_LOCK) { 1085 mLockWallpaperMap.remove(userId); 1086 final IWallpaperManagerCallback cb = mKeyguardListener; 1087 if (cb != null) { 1088 if (DEBUG) { 1089 Slog.i(TAG, "Notifying keyguard of lock wallpaper clear"); 1090 } 1091 try { 1092 cb.onWallpaperChanged(); 1093 } catch (RemoteException e) { 1094 // Oh well it went away; no big deal 1095 } 1096 } 1097 saveSettingsLocked(userId); 1098 return; 1099 } 1100 } 1101 1102 RuntimeException e = null; 1103 try { 1104 wallpaper.imageWallpaperPending = false; 1105 if (userId != mCurrentUserId) return; 1106 if (bindWallpaperComponentLocked(defaultFailed 1107 ? mImageWallpaper 1108 : null, true, false, wallpaper, reply)) { 1109 return; 1110 } 1111 } catch (IllegalArgumentException e1) { 1112 e = e1; 1113 } 1114 1115 // This can happen if the default wallpaper component doesn't 1116 // exist. This should be a system configuration problem, but 1117 // let's not let it crash the system and just live with no 1118 // wallpaper. 1119 Slog.e(TAG, "Default wallpaper component not found!", e); 1120 clearWallpaperComponentLocked(wallpaper); 1121 if (reply != null) { 1122 try { 1123 reply.sendResult(null); 1124 } catch (RemoteException e1) { 1125 } 1126 } 1127 } finally { 1128 Binder.restoreCallingIdentity(ident); 1129 } 1130 } 1131 1132 public boolean hasNamedWallpaper(String name) { 1133 synchronized (mLock) { 1134 List<UserInfo> users; 1135 long ident = Binder.clearCallingIdentity(); 1136 try { 1137 users = ((UserManager) mContext.getSystemService(Context.USER_SERVICE)).getUsers(); 1138 } finally { 1139 Binder.restoreCallingIdentity(ident); 1140 } 1141 for (UserInfo user: users) { 1142 // ignore managed profiles 1143 if (user.isManagedProfile()) { 1144 continue; 1145 } 1146 WallpaperData wd = mWallpaperMap.get(user.id); 1147 if (wd == null) { 1148 // User hasn't started yet, so load her settings to peek at the wallpaper 1149 loadSettingsLocked(user.id, false); 1150 wd = mWallpaperMap.get(user.id); 1151 } 1152 if (wd != null && name.equals(wd.name)) { 1153 return true; 1154 } 1155 } 1156 } 1157 return false; 1158 } 1159 1160 private Point getDefaultDisplaySize() { 1161 Point p = new Point(); 1162 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 1163 Display d = wm.getDefaultDisplay(); 1164 d.getRealSize(p); 1165 return p; 1166 } 1167 1168 public void setDimensionHints(int width, int height, String callingPackage) 1169 throws RemoteException { 1170 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 1171 if (!isWallpaperSupported(callingPackage)) { 1172 return; 1173 } 1174 synchronized (mLock) { 1175 int userId = UserHandle.getCallingUserId(); 1176 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 1177 if (width <= 0 || height <= 0) { 1178 throw new IllegalArgumentException("width and height must be > 0"); 1179 } 1180 // Make sure it is at least as large as the display. 1181 Point displaySize = getDefaultDisplaySize(); 1182 width = Math.max(width, displaySize.x); 1183 height = Math.max(height, displaySize.y); 1184 1185 if (width != wallpaper.width || height != wallpaper.height) { 1186 wallpaper.width = width; 1187 wallpaper.height = height; 1188 saveSettingsLocked(userId); 1189 if (mCurrentUserId != userId) return; // Don't change the properties now 1190 if (wallpaper.connection != null) { 1191 if (wallpaper.connection.mEngine != null) { 1192 try { 1193 wallpaper.connection.mEngine.setDesiredSize( 1194 width, height); 1195 } catch (RemoteException e) { 1196 } 1197 notifyCallbacksLocked(wallpaper); 1198 } else if (wallpaper.connection.mService != null) { 1199 // We've attached to the service but the engine hasn't attached back to us 1200 // yet. This means it will be created with the previous dimensions, so we 1201 // need to update it to the new dimensions once it attaches. 1202 wallpaper.connection.mDimensionsChanged = true; 1203 } 1204 } 1205 } 1206 } 1207 } 1208 1209 public int getWidthHint() throws RemoteException { 1210 synchronized (mLock) { 1211 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 1212 if (wallpaper != null) { 1213 return wallpaper.width; 1214 } else { 1215 return 0; 1216 } 1217 } 1218 } 1219 1220 public int getHeightHint() throws RemoteException { 1221 synchronized (mLock) { 1222 WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId()); 1223 if (wallpaper != null) { 1224 return wallpaper.height; 1225 } else { 1226 return 0; 1227 } 1228 } 1229 } 1230 1231 public void setDisplayPadding(Rect padding, String callingPackage) { 1232 checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS); 1233 if (!isWallpaperSupported(callingPackage)) { 1234 return; 1235 } 1236 synchronized (mLock) { 1237 int userId = UserHandle.getCallingUserId(); 1238 WallpaperData wallpaper = getWallpaperSafeLocked(userId, FLAG_SYSTEM); 1239 if (padding.left < 0 || padding.top < 0 || padding.right < 0 || padding.bottom < 0) { 1240 throw new IllegalArgumentException("padding must be positive: " + padding); 1241 } 1242 1243 if (!padding.equals(wallpaper.padding)) { 1244 wallpaper.padding.set(padding); 1245 saveSettingsLocked(userId); 1246 if (mCurrentUserId != userId) return; // Don't change the properties now 1247 if (wallpaper.connection != null) { 1248 if (wallpaper.connection.mEngine != null) { 1249 try { 1250 wallpaper.connection.mEngine.setDisplayPadding(padding); 1251 } catch (RemoteException e) { 1252 } 1253 notifyCallbacksLocked(wallpaper); 1254 } else if (wallpaper.connection.mService != null) { 1255 // We've attached to the service but the engine hasn't attached back to us 1256 // yet. This means it will be created with the previous dimensions, so we 1257 // need to update it to the new dimensions once it attaches. 1258 wallpaper.connection.mPaddingChanged = true; 1259 } 1260 } 1261 } 1262 } 1263 } 1264 1265 @Override 1266 public ParcelFileDescriptor getWallpaper(IWallpaperManagerCallback cb, final int which, 1267 Bundle outParams, int wallpaperUserId) { 1268 wallpaperUserId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1269 Binder.getCallingUid(), wallpaperUserId, false, true, "getWallpaper", null); 1270 1271 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1272 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper to read"); 1273 } 1274 1275 synchronized (mLock) { 1276 final SparseArray<WallpaperData> whichSet = 1277 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 1278 WallpaperData wallpaper = whichSet.get(wallpaperUserId); 1279 if (wallpaper == null) { 1280 // common case, this is the first lookup post-boot of the system or 1281 // unified lock, so we bring up the saved state lazily now and recheck. 1282 loadSettingsLocked(wallpaperUserId, false); 1283 wallpaper = whichSet.get(wallpaperUserId); 1284 if (wallpaper == null) { 1285 return null; 1286 } 1287 } 1288 try { 1289 if (outParams != null) { 1290 outParams.putInt("width", wallpaper.width); 1291 outParams.putInt("height", wallpaper.height); 1292 } 1293 if (cb != null) { 1294 wallpaper.callbacks.register(cb); 1295 } 1296 if (!wallpaper.cropFile.exists()) { 1297 return null; 1298 } 1299 return ParcelFileDescriptor.open(wallpaper.cropFile, MODE_READ_ONLY); 1300 } catch (FileNotFoundException e) { 1301 /* Shouldn't happen as we check to see if the file exists */ 1302 Slog.w(TAG, "Error getting wallpaper", e); 1303 } 1304 return null; 1305 } 1306 } 1307 1308 @Override 1309 public WallpaperInfo getWallpaperInfo(int userId) { 1310 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1311 Binder.getCallingUid(), userId, false, true, "getWallpaperIdForUser", null); 1312 synchronized (mLock) { 1313 WallpaperData wallpaper = mWallpaperMap.get(userId); 1314 if (wallpaper != null && wallpaper.connection != null) { 1315 return wallpaper.connection.mInfo; 1316 } 1317 return null; 1318 } 1319 } 1320 1321 @Override 1322 public int getWallpaperIdForUser(int which, int userId) { 1323 userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(), 1324 Binder.getCallingUid(), userId, false, true, "getWallpaperIdForUser", null); 1325 1326 if (which != FLAG_SYSTEM && which != FLAG_LOCK) { 1327 throw new IllegalArgumentException("Must specify exactly one kind of wallpaper"); 1328 } 1329 1330 final SparseArray<WallpaperData> map = 1331 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 1332 synchronized (mLock) { 1333 WallpaperData wallpaper = map.get(userId); 1334 if (wallpaper != null) { 1335 return wallpaper.wallpaperId; 1336 } 1337 } 1338 return -1; 1339 } 1340 1341 @Override 1342 public boolean setLockWallpaperCallback(IWallpaperManagerCallback cb) { 1343 checkPermission(android.Manifest.permission.INTERNAL_SYSTEM_WINDOW); 1344 synchronized (mLock) { 1345 mKeyguardListener = cb; 1346 } 1347 return true; 1348 } 1349 1350 @Override 1351 public ParcelFileDescriptor setWallpaper(String name, String callingPackage, 1352 Rect cropHint, boolean allowBackup, Bundle extras, int which, 1353 IWallpaperManagerCallback completion) { 1354 checkPermission(android.Manifest.permission.SET_WALLPAPER); 1355 1356 if ((which & (FLAG_LOCK|FLAG_SYSTEM)) == 0) { 1357 final String msg = "Must specify a valid wallpaper category to set"; 1358 Slog.e(TAG, msg); 1359 throw new IllegalArgumentException(msg); 1360 } 1361 1362 if (!isWallpaperSupported(callingPackage) || !isSetWallpaperAllowed(callingPackage)) { 1363 return null; 1364 } 1365 1366 // "null" means the no-op crop, preserving the full input image 1367 if (cropHint == null) { 1368 cropHint = new Rect(0, 0, 0, 0); 1369 } else { 1370 if (cropHint.isEmpty() 1371 || cropHint.left < 0 1372 || cropHint.top < 0) { 1373 throw new IllegalArgumentException("Invalid crop rect supplied: " + cropHint); 1374 } 1375 } 1376 1377 final int userId = UserHandle.getCallingUserId(); 1378 1379 synchronized (mLock) { 1380 if (DEBUG) Slog.v(TAG, "setWallpaper which=0x" + Integer.toHexString(which)); 1381 WallpaperData wallpaper; 1382 1383 /* If we're setting system but not lock, and lock is currently sharing the system 1384 * wallpaper, we need to migrate that image over to being lock-only before 1385 * the caller here writes new bitmap data. 1386 */ 1387 if (which == FLAG_SYSTEM && mLockWallpaperMap.get(userId) == null) { 1388 if (DEBUG) { 1389 Slog.i(TAG, "Migrating system->lock to preserve"); 1390 } 1391 migrateSystemToLockWallpaperLocked(userId); 1392 } 1393 1394 wallpaper = getWallpaperSafeLocked(userId, which); 1395 final long ident = Binder.clearCallingIdentity(); 1396 try { 1397 ParcelFileDescriptor pfd = updateWallpaperBitmapLocked(name, wallpaper, extras); 1398 if (pfd != null) { 1399 wallpaper.imageWallpaperPending = true; 1400 wallpaper.whichPending = which; 1401 wallpaper.setComplete = completion; 1402 wallpaper.cropHint.set(cropHint); 1403 wallpaper.allowBackup = allowBackup; 1404 } 1405 return pfd; 1406 } finally { 1407 Binder.restoreCallingIdentity(ident); 1408 } 1409 } 1410 } 1411 1412 private void migrateSystemToLockWallpaperLocked(int userId) { 1413 WallpaperData sysWP = mWallpaperMap.get(userId); 1414 if (sysWP == null) { 1415 if (DEBUG) { 1416 Slog.i(TAG, "No system wallpaper? Not tracking for lock-only"); 1417 } 1418 return; 1419 } 1420 1421 // We know a-priori that there is no lock-only wallpaper currently 1422 WallpaperData lockWP = new WallpaperData(userId, 1423 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1424 lockWP.wallpaperId = sysWP.wallpaperId; 1425 lockWP.cropHint.set(sysWP.cropHint); 1426 lockWP.width = sysWP.width; 1427 lockWP.height = sysWP.height; 1428 lockWP.allowBackup = false; 1429 1430 // Migrate the bitmap files outright; no need to copy 1431 try { 1432 Os.rename(sysWP.wallpaperFile.getAbsolutePath(), lockWP.wallpaperFile.getAbsolutePath()); 1433 Os.rename(sysWP.cropFile.getAbsolutePath(), lockWP.cropFile.getAbsolutePath()); 1434 } catch (ErrnoException e) { 1435 Slog.e(TAG, "Can't migrate system wallpaper: " + e.getMessage()); 1436 lockWP.wallpaperFile.delete(); 1437 lockWP.cropFile.delete(); 1438 return; 1439 } 1440 1441 mLockWallpaperMap.put(userId, lockWP); 1442 } 1443 1444 ParcelFileDescriptor updateWallpaperBitmapLocked(String name, WallpaperData wallpaper, 1445 Bundle extras) { 1446 if (name == null) name = ""; 1447 try { 1448 File dir = getWallpaperDir(wallpaper.userId); 1449 if (!dir.exists()) { 1450 dir.mkdir(); 1451 FileUtils.setPermissions( 1452 dir.getPath(), 1453 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 1454 -1, -1); 1455 } 1456 ParcelFileDescriptor fd = ParcelFileDescriptor.open(wallpaper.wallpaperFile, 1457 MODE_CREATE|MODE_READ_WRITE|MODE_TRUNCATE); 1458 if (!SELinux.restorecon(wallpaper.wallpaperFile)) { 1459 return null; 1460 } 1461 wallpaper.name = name; 1462 wallpaper.wallpaperId = makeWallpaperIdLocked(); 1463 if (extras != null) { 1464 extras.putInt(WallpaperManager.EXTRA_NEW_WALLPAPER_ID, wallpaper.wallpaperId); 1465 } 1466 if (DEBUG) { 1467 Slog.v(TAG, "updateWallpaperBitmapLocked() : id=" + wallpaper.wallpaperId 1468 + " name=" + name + " file=" + wallpaper.wallpaperFile.getName()); 1469 } 1470 return fd; 1471 } catch (FileNotFoundException e) { 1472 Slog.w(TAG, "Error setting wallpaper", e); 1473 } 1474 return null; 1475 } 1476 1477 @Override 1478 public void setWallpaperComponentChecked(ComponentName name, String callingPackage, 1479 int userId) { 1480 1481 if (isWallpaperSupported(callingPackage) && isSetWallpaperAllowed(callingPackage)) { 1482 setWallpaperComponent(name, userId); 1483 } 1484 } 1485 1486 // ToDo: Remove this version of the function 1487 @Override 1488 public void setWallpaperComponent(ComponentName name) { 1489 setWallpaperComponent(name, UserHandle.getCallingUserId()); 1490 } 1491 1492 private void setWallpaperComponent(ComponentName name, int userId) { 1493 userId = ActivityManager.handleIncomingUser(getCallingPid(), getCallingUid(), userId, 1494 false /* all */, true /* full */, "changing live wallpaper", null /* pkg */); 1495 checkPermission(android.Manifest.permission.SET_WALLPAPER_COMPONENT); 1496 1497 synchronized (mLock) { 1498 if (DEBUG) Slog.v(TAG, "setWallpaperComponent name=" + name); 1499 WallpaperData wallpaper = mWallpaperMap.get(userId); 1500 if (wallpaper == null) { 1501 throw new IllegalStateException("Wallpaper not yet initialized for user " + userId); 1502 } 1503 final long ident = Binder.clearCallingIdentity(); 1504 try { 1505 wallpaper.imageWallpaperPending = false; 1506 if (bindWallpaperComponentLocked(name, false, true, wallpaper, null)) { 1507 wallpaper.wallpaperId = makeWallpaperIdLocked(); 1508 notifyCallbacksLocked(wallpaper); 1509 } 1510 } finally { 1511 Binder.restoreCallingIdentity(ident); 1512 } 1513 } 1514 } 1515 1516 boolean bindWallpaperComponentLocked(ComponentName componentName, boolean force, 1517 boolean fromUser, WallpaperData wallpaper, IRemoteCallback reply) { 1518 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName); 1519 // Has the component changed? 1520 if (!force) { 1521 if (wallpaper.connection != null) { 1522 if (wallpaper.wallpaperComponent == null) { 1523 if (componentName == null) { 1524 if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: still using default"); 1525 // Still using default wallpaper. 1526 return true; 1527 } 1528 } else if (wallpaper.wallpaperComponent.equals(componentName)) { 1529 // Changing to same wallpaper. 1530 if (DEBUG) Slog.v(TAG, "same wallpaper"); 1531 return true; 1532 } 1533 } 1534 } 1535 1536 try { 1537 if (componentName == null) { 1538 componentName = WallpaperManager.getDefaultWallpaperComponent(mContext); 1539 if (componentName == null) { 1540 // Fall back to static image wallpaper 1541 componentName = mImageWallpaper; 1542 //clearWallpaperComponentLocked(); 1543 //return; 1544 if (DEBUG) Slog.v(TAG, "Using image wallpaper"); 1545 } 1546 } 1547 int serviceUserId = wallpaper.userId; 1548 ServiceInfo si = mIPackageManager.getServiceInfo(componentName, 1549 PackageManager.GET_META_DATA | PackageManager.GET_PERMISSIONS, serviceUserId); 1550 if (si == null) { 1551 // The wallpaper component we're trying to use doesn't exist 1552 Slog.w(TAG, "Attempted wallpaper " + componentName + " is unavailable"); 1553 return false; 1554 } 1555 if (!android.Manifest.permission.BIND_WALLPAPER.equals(si.permission)) { 1556 String msg = "Selected service does not require " 1557 + android.Manifest.permission.BIND_WALLPAPER 1558 + ": " + componentName; 1559 if (fromUser) { 1560 throw new SecurityException(msg); 1561 } 1562 Slog.w(TAG, msg); 1563 return false; 1564 } 1565 1566 WallpaperInfo wi = null; 1567 1568 Intent intent = new Intent(WallpaperService.SERVICE_INTERFACE); 1569 if (componentName != null && !componentName.equals(mImageWallpaper)) { 1570 // Make sure the selected service is actually a wallpaper service. 1571 List<ResolveInfo> ris = 1572 mIPackageManager.queryIntentServices(intent, 1573 intent.resolveTypeIfNeeded(mContext.getContentResolver()), 1574 PackageManager.GET_META_DATA, serviceUserId).getList(); 1575 for (int i=0; i<ris.size(); i++) { 1576 ServiceInfo rsi = ris.get(i).serviceInfo; 1577 if (rsi.name.equals(si.name) && 1578 rsi.packageName.equals(si.packageName)) { 1579 try { 1580 wi = new WallpaperInfo(mContext, ris.get(i)); 1581 } catch (XmlPullParserException e) { 1582 if (fromUser) { 1583 throw new IllegalArgumentException(e); 1584 } 1585 Slog.w(TAG, e); 1586 return false; 1587 } catch (IOException e) { 1588 if (fromUser) { 1589 throw new IllegalArgumentException(e); 1590 } 1591 Slog.w(TAG, e); 1592 return false; 1593 } 1594 break; 1595 } 1596 } 1597 if (wi == null) { 1598 String msg = "Selected service is not a wallpaper: " 1599 + componentName; 1600 if (fromUser) { 1601 throw new SecurityException(msg); 1602 } 1603 Slog.w(TAG, msg); 1604 return false; 1605 } 1606 } 1607 1608 // Bind the service! 1609 if (DEBUG) Slog.v(TAG, "Binding to:" + componentName); 1610 WallpaperConnection newConn = new WallpaperConnection(wi, wallpaper); 1611 intent.setComponent(componentName); 1612 intent.putExtra(Intent.EXTRA_CLIENT_LABEL, 1613 com.android.internal.R.string.wallpaper_binding_label); 1614 intent.putExtra(Intent.EXTRA_CLIENT_INTENT, PendingIntent.getActivityAsUser( 1615 mContext, 0, 1616 Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER), 1617 mContext.getText(com.android.internal.R.string.chooser_wallpaper)), 1618 0, null, new UserHandle(serviceUserId))); 1619 if (!mContext.bindServiceAsUser(intent, newConn, 1620 Context.BIND_AUTO_CREATE | Context.BIND_SHOWING_UI 1621 | Context.BIND_FOREGROUND_SERVICE_WHILE_AWAKE, 1622 new UserHandle(serviceUserId))) { 1623 String msg = "Unable to bind service: " 1624 + componentName; 1625 if (fromUser) { 1626 throw new IllegalArgumentException(msg); 1627 } 1628 Slog.w(TAG, msg); 1629 return false; 1630 } 1631 if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) { 1632 detachWallpaperLocked(mLastWallpaper); 1633 } 1634 wallpaper.wallpaperComponent = componentName; 1635 wallpaper.connection = newConn; 1636 newConn.mReply = reply; 1637 try { 1638 if (wallpaper.userId == mCurrentUserId) { 1639 if (DEBUG) 1640 Slog.v(TAG, "Adding window token: " + newConn.mToken); 1641 mIWindowManager.addWindowToken(newConn.mToken, 1642 WindowManager.LayoutParams.TYPE_WALLPAPER); 1643 mLastWallpaper = wallpaper; 1644 } 1645 } catch (RemoteException e) { 1646 } 1647 } catch (RemoteException e) { 1648 String msg = "Remote exception for " + componentName + "\n" + e; 1649 if (fromUser) { 1650 throw new IllegalArgumentException(msg); 1651 } 1652 Slog.w(TAG, msg); 1653 return false; 1654 } 1655 return true; 1656 } 1657 1658 void detachWallpaperLocked(WallpaperData wallpaper) { 1659 if (wallpaper.connection != null) { 1660 if (wallpaper.connection.mReply != null) { 1661 try { 1662 wallpaper.connection.mReply.sendResult(null); 1663 } catch (RemoteException e) { 1664 } 1665 wallpaper.connection.mReply = null; 1666 } 1667 if (wallpaper.connection.mEngine != null) { 1668 try { 1669 wallpaper.connection.mEngine.destroy(); 1670 } catch (RemoteException e) { 1671 } 1672 } 1673 mContext.unbindService(wallpaper.connection); 1674 try { 1675 if (DEBUG) 1676 Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken); 1677 mIWindowManager.removeWindowToken(wallpaper.connection.mToken); 1678 } catch (RemoteException e) { 1679 } 1680 wallpaper.connection.mService = null; 1681 wallpaper.connection.mEngine = null; 1682 wallpaper.connection = null; 1683 } 1684 } 1685 1686 void clearWallpaperComponentLocked(WallpaperData wallpaper) { 1687 wallpaper.wallpaperComponent = null; 1688 detachWallpaperLocked(wallpaper); 1689 } 1690 1691 void attachServiceLocked(WallpaperConnection conn, WallpaperData wallpaper) { 1692 try { 1693 conn.mService.attach(conn, conn.mToken, 1694 WindowManager.LayoutParams.TYPE_WALLPAPER, false, 1695 wallpaper.width, wallpaper.height, wallpaper.padding); 1696 } catch (RemoteException e) { 1697 Slog.w(TAG, "Failed attaching wallpaper; clearing", e); 1698 if (!wallpaper.wallpaperUpdating) { 1699 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 1700 } 1701 } 1702 } 1703 1704 private void notifyCallbacksLocked(WallpaperData wallpaper) { 1705 final int n = wallpaper.callbacks.beginBroadcast(); 1706 for (int i = 0; i < n; i++) { 1707 try { 1708 wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged(); 1709 } catch (RemoteException e) { 1710 1711 // The RemoteCallbackList will take care of removing 1712 // the dead object for us. 1713 } 1714 } 1715 wallpaper.callbacks.finishBroadcast(); 1716 final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED); 1717 mContext.sendBroadcastAsUser(intent, new UserHandle(mCurrentUserId)); 1718 } 1719 1720 private void checkPermission(String permission) { 1721 if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) { 1722 throw new SecurityException("Access denied to process: " + Binder.getCallingPid() 1723 + ", must have permission " + permission); 1724 } 1725 } 1726 1727 /** 1728 * Certain user types do not support wallpapers (e.g. managed profiles). The check is 1729 * implemented through through the OP_WRITE_WALLPAPER AppOp. 1730 */ 1731 public boolean isWallpaperSupported(String callingPackage) { 1732 return mAppOpsManager.checkOpNoThrow(AppOpsManager.OP_WRITE_WALLPAPER, Binder.getCallingUid(), 1733 callingPackage) == AppOpsManager.MODE_ALLOWED; 1734 } 1735 1736 @Override 1737 public boolean isSetWallpaperAllowed(String callingPackage) { 1738 final PackageManager pm = mContext.getPackageManager(); 1739 String[] uidPackages = pm.getPackagesForUid(Binder.getCallingUid()); 1740 boolean uidMatchPackage = Arrays.asList(uidPackages).contains(callingPackage); 1741 if (!uidMatchPackage) { 1742 return false; // callingPackage was faked. 1743 } 1744 1745 final DevicePolicyManager dpm = mContext.getSystemService(DevicePolicyManager.class); 1746 if (dpm.isDeviceOwnerApp(callingPackage) || dpm.isProfileOwnerApp(callingPackage)) { 1747 return true; 1748 } 1749 final UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 1750 return !um.hasUserRestriction(UserManager.DISALLOW_SET_WALLPAPER); 1751 } 1752 1753 @Override 1754 public boolean isWallpaperBackupEligible(int which, int userId) { 1755 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 1756 throw new SecurityException("Only the system may call isWallpaperBackupEligible"); 1757 } 1758 1759 WallpaperData wallpaper = (which == FLAG_LOCK) 1760 ? mWallpaperMap.get(userId) 1761 : mLockWallpaperMap.get(userId); 1762 return (wallpaper != null) ? wallpaper.allowBackup : false; 1763 } 1764 1765 private static JournaledFile makeJournaledFile(int userId) { 1766 final String base = new File(getWallpaperDir(userId), WALLPAPER_INFO).getAbsolutePath(); 1767 return new JournaledFile(new File(base), new File(base + ".tmp")); 1768 } 1769 1770 private void saveSettingsLocked(int userId) { 1771 JournaledFile journal = makeJournaledFile(userId); 1772 FileOutputStream fstream = null; 1773 BufferedOutputStream stream = null; 1774 try { 1775 XmlSerializer out = new FastXmlSerializer(); 1776 fstream = new FileOutputStream(journal.chooseForWrite(), false); 1777 stream = new BufferedOutputStream(fstream); 1778 out.setOutput(stream, StandardCharsets.UTF_8.name()); 1779 out.startDocument(null, true); 1780 1781 WallpaperData wallpaper; 1782 1783 wallpaper = mWallpaperMap.get(userId); 1784 if (wallpaper != null) { 1785 writeWallpaperAttributes(out, "wp", wallpaper); 1786 } 1787 wallpaper = mLockWallpaperMap.get(userId); 1788 if (wallpaper != null) { 1789 writeWallpaperAttributes(out, "kwp", wallpaper); 1790 } 1791 1792 out.endDocument(); 1793 1794 stream.flush(); // also flushes fstream 1795 FileUtils.sync(fstream); 1796 stream.close(); // also closes fstream 1797 journal.commit(); 1798 } catch (IOException e) { 1799 IoUtils.closeQuietly(stream); 1800 journal.rollback(); 1801 } 1802 } 1803 1804 private void writeWallpaperAttributes(XmlSerializer out, String tag, WallpaperData wallpaper) 1805 throws IllegalArgumentException, IllegalStateException, IOException { 1806 out.startTag(null, tag); 1807 out.attribute(null, "id", Integer.toString(wallpaper.wallpaperId)); 1808 out.attribute(null, "width", Integer.toString(wallpaper.width)); 1809 out.attribute(null, "height", Integer.toString(wallpaper.height)); 1810 1811 out.attribute(null, "cropLeft", Integer.toString(wallpaper.cropHint.left)); 1812 out.attribute(null, "cropTop", Integer.toString(wallpaper.cropHint.top)); 1813 out.attribute(null, "cropRight", Integer.toString(wallpaper.cropHint.right)); 1814 out.attribute(null, "cropBottom", Integer.toString(wallpaper.cropHint.bottom)); 1815 1816 if (wallpaper.padding.left != 0) { 1817 out.attribute(null, "paddingLeft", Integer.toString(wallpaper.padding.left)); 1818 } 1819 if (wallpaper.padding.top != 0) { 1820 out.attribute(null, "paddingTop", Integer.toString(wallpaper.padding.top)); 1821 } 1822 if (wallpaper.padding.right != 0) { 1823 out.attribute(null, "paddingRight", Integer.toString(wallpaper.padding.right)); 1824 } 1825 if (wallpaper.padding.bottom != 0) { 1826 out.attribute(null, "paddingBottom", Integer.toString(wallpaper.padding.bottom)); 1827 } 1828 1829 out.attribute(null, "name", wallpaper.name); 1830 if (wallpaper.wallpaperComponent != null 1831 && !wallpaper.wallpaperComponent.equals(mImageWallpaper)) { 1832 out.attribute(null, "component", 1833 wallpaper.wallpaperComponent.flattenToShortString()); 1834 } 1835 1836 if (wallpaper.allowBackup) { 1837 out.attribute(null, "backup", "true"); 1838 } 1839 1840 out.endTag(null, tag); 1841 } 1842 1843 private void migrateFromOld() { 1844 File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY); 1845 File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY); 1846 if (oldWallpaper.exists()) { 1847 File newWallpaper = new File(getWallpaperDir(0), WALLPAPER); 1848 oldWallpaper.renameTo(newWallpaper); 1849 } 1850 if (oldInfo.exists()) { 1851 File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO); 1852 oldInfo.renameTo(newInfo); 1853 } 1854 } 1855 1856 private int getAttributeInt(XmlPullParser parser, String name, int defValue) { 1857 String value = parser.getAttributeValue(null, name); 1858 if (value == null) { 1859 return defValue; 1860 } 1861 return Integer.parseInt(value); 1862 } 1863 1864 /** 1865 * Sometimes it is expected the wallpaper map may not have a user's data. E.g. This could 1866 * happen during user switch. The async user switch observer may not have received 1867 * the event yet. We use this safe method when we don't care about this ordering and just 1868 * want to update the data. The data is going to be applied when the user switch observer 1869 * is eventually executed. 1870 */ 1871 private WallpaperData getWallpaperSafeLocked(int userId, int which) { 1872 // We're setting either just system (work with the system wallpaper), 1873 // both (also work with the system wallpaper), or just the lock 1874 // wallpaper (update against the existing lock wallpaper if any). 1875 // Combined or just-system operations use the 'system' WallpaperData 1876 // for this use; lock-only operations use the dedicated one. 1877 final SparseArray<WallpaperData> whichSet = 1878 (which == FLAG_LOCK) ? mLockWallpaperMap : mWallpaperMap; 1879 WallpaperData wallpaper = whichSet.get(userId); 1880 if (wallpaper == null) { 1881 // common case, this is the first lookup post-boot of the system or 1882 // unified lock, so we bring up the saved state lazily now and recheck. 1883 loadSettingsLocked(userId, false); 1884 wallpaper = whichSet.get(userId); 1885 // if it's still null here, this is a lock-only operation and there is not 1886 // yet a lock-only wallpaper set for this user, so we need to establish 1887 // it now. 1888 if (wallpaper == null) { 1889 if (which == FLAG_LOCK) { 1890 wallpaper = new WallpaperData(userId, 1891 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1892 mLockWallpaperMap.put(userId, wallpaper); 1893 ensureSaneWallpaperData(wallpaper); 1894 } else { 1895 // sanity fallback: we're in bad shape, but establishing a known 1896 // valid system+lock WallpaperData will keep us from dying. 1897 Slog.wtf(TAG, "Didn't find wallpaper in non-lock case!"); 1898 wallpaper = new WallpaperData(userId, WALLPAPER, WALLPAPER_CROP); 1899 mWallpaperMap.put(userId, wallpaper); 1900 ensureSaneWallpaperData(wallpaper); 1901 } 1902 } 1903 } 1904 return wallpaper; 1905 } 1906 1907 private void loadSettingsLocked(int userId, boolean keepDimensionHints) { 1908 if (DEBUG) Slog.v(TAG, "loadSettingsLocked"); 1909 1910 JournaledFile journal = makeJournaledFile(userId); 1911 FileInputStream stream = null; 1912 File file = journal.chooseForRead(); 1913 if (!file.exists()) { 1914 // This should only happen one time, when upgrading from a legacy system 1915 migrateFromOld(); 1916 } 1917 WallpaperData wallpaper = mWallpaperMap.get(userId); 1918 if (wallpaper == null) { 1919 wallpaper = new WallpaperData(userId, WALLPAPER, WALLPAPER_CROP); 1920 wallpaper.allowBackup = true; 1921 mWallpaperMap.put(userId, wallpaper); 1922 if (!wallpaper.cropExists()) { 1923 generateCrop(wallpaper); 1924 } 1925 } 1926 boolean success = false; 1927 try { 1928 stream = new FileInputStream(file); 1929 XmlPullParser parser = Xml.newPullParser(); 1930 parser.setInput(stream, StandardCharsets.UTF_8.name()); 1931 1932 int type; 1933 do { 1934 type = parser.next(); 1935 if (type == XmlPullParser.START_TAG) { 1936 String tag = parser.getName(); 1937 if ("wp".equals(tag)) { 1938 // Common to system + lock wallpapers 1939 parseWallpaperAttributes(parser, wallpaper, keepDimensionHints); 1940 1941 // A system wallpaper might also be a live wallpaper 1942 String comp = parser.getAttributeValue(null, "component"); 1943 wallpaper.nextWallpaperComponent = comp != null 1944 ? ComponentName.unflattenFromString(comp) 1945 : null; 1946 if (wallpaper.nextWallpaperComponent == null 1947 || "android".equals(wallpaper.nextWallpaperComponent 1948 .getPackageName())) { 1949 wallpaper.nextWallpaperComponent = mImageWallpaper; 1950 } 1951 1952 if (DEBUG) { 1953 Slog.v(TAG, "mWidth:" + wallpaper.width); 1954 Slog.v(TAG, "mHeight:" + wallpaper.height); 1955 Slog.v(TAG, "cropRect:" + wallpaper.cropHint); 1956 Slog.v(TAG, "mName:" + wallpaper.name); 1957 Slog.v(TAG, "mNextWallpaperComponent:" 1958 + wallpaper.nextWallpaperComponent); 1959 } 1960 } else if ("kwp".equals(tag)) { 1961 // keyguard-specific wallpaper for this user 1962 WallpaperData lockWallpaper = mLockWallpaperMap.get(userId); 1963 if (lockWallpaper == null) { 1964 lockWallpaper = new WallpaperData(userId, 1965 WALLPAPER_LOCK_ORIG, WALLPAPER_LOCK_CROP); 1966 mLockWallpaperMap.put(userId, lockWallpaper); 1967 } 1968 parseWallpaperAttributes(parser, lockWallpaper, false); 1969 } 1970 } 1971 } while (type != XmlPullParser.END_DOCUMENT); 1972 success = true; 1973 } catch (FileNotFoundException e) { 1974 Slog.w(TAG, "no current wallpaper -- first boot?"); 1975 } catch (NullPointerException e) { 1976 Slog.w(TAG, "failed parsing " + file + " " + e); 1977 } catch (NumberFormatException e) { 1978 Slog.w(TAG, "failed parsing " + file + " " + e); 1979 } catch (XmlPullParserException e) { 1980 Slog.w(TAG, "failed parsing " + file + " " + e); 1981 } catch (IOException e) { 1982 Slog.w(TAG, "failed parsing " + file + " " + e); 1983 } catch (IndexOutOfBoundsException e) { 1984 Slog.w(TAG, "failed parsing " + file + " " + e); 1985 } 1986 IoUtils.closeQuietly(stream); 1987 1988 if (!success) { 1989 wallpaper.width = -1; 1990 wallpaper.height = -1; 1991 wallpaper.cropHint.set(0, 0, 0, 0); 1992 wallpaper.padding.set(0, 0, 0, 0); 1993 wallpaper.name = ""; 1994 1995 mLockWallpaperMap.remove(userId); 1996 } else { 1997 if (wallpaper.wallpaperId <= 0) { 1998 wallpaper.wallpaperId = makeWallpaperIdLocked(); 1999 if (DEBUG) { 2000 Slog.w(TAG, "Didn't set wallpaper id in loadSettingsLocked(" + userId 2001 + "); now " + wallpaper.wallpaperId); 2002 } 2003 } 2004 } 2005 2006 ensureSaneWallpaperData(wallpaper); 2007 WallpaperData lockWallpaper = mLockWallpaperMap.get(userId); 2008 if (lockWallpaper != null) { 2009 ensureSaneWallpaperData(lockWallpaper); 2010 } 2011 } 2012 2013 private void ensureSaneWallpaperData(WallpaperData wallpaper) { 2014 // We always want to have some reasonable width hint. 2015 int baseSize = getMaximumSizeDimension(); 2016 if (wallpaper.width < baseSize) { 2017 wallpaper.width = baseSize; 2018 } 2019 if (wallpaper.height < baseSize) { 2020 wallpaper.height = baseSize; 2021 } 2022 // and crop, if not previously specified 2023 if (wallpaper.cropHint.width() <= 0 2024 || wallpaper.cropHint.height() <= 0) { 2025 wallpaper.cropHint.set(0, 0, wallpaper.width, wallpaper.height); 2026 } 2027 } 2028 2029 private void parseWallpaperAttributes(XmlPullParser parser, WallpaperData wallpaper, 2030 boolean keepDimensionHints) { 2031 final String idString = parser.getAttributeValue(null, "id"); 2032 if (idString != null) { 2033 final int id = wallpaper.wallpaperId = Integer.parseInt(idString); 2034 if (id > mWallpaperId) { 2035 mWallpaperId = id; 2036 } 2037 } else { 2038 wallpaper.wallpaperId = makeWallpaperIdLocked(); 2039 } 2040 2041 if (!keepDimensionHints) { 2042 wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width")); 2043 wallpaper.height = Integer.parseInt(parser 2044 .getAttributeValue(null, "height")); 2045 } 2046 wallpaper.cropHint.left = getAttributeInt(parser, "cropLeft", 0); 2047 wallpaper.cropHint.top = getAttributeInt(parser, "cropTop", 0); 2048 wallpaper.cropHint.right = getAttributeInt(parser, "cropRight", 0); 2049 wallpaper.cropHint.bottom = getAttributeInt(parser, "cropBottom", 0); 2050 wallpaper.padding.left = getAttributeInt(parser, "paddingLeft", 0); 2051 wallpaper.padding.top = getAttributeInt(parser, "paddingTop", 0); 2052 wallpaper.padding.right = getAttributeInt(parser, "paddingRight", 0); 2053 wallpaper.padding.bottom = getAttributeInt(parser, "paddingBottom", 0); 2054 wallpaper.name = parser.getAttributeValue(null, "name"); 2055 wallpaper.allowBackup = "true".equals(parser.getAttributeValue(null, "backup")); 2056 } 2057 2058 private int getMaximumSizeDimension() { 2059 WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE); 2060 Display d = wm.getDefaultDisplay(); 2061 return d.getMaximumSizeDimension(); 2062 } 2063 2064 // Called by SystemBackupAgent after files are restored to disk. 2065 public void settingsRestored() { 2066 // Verify caller is the system 2067 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 2068 throw new RuntimeException("settingsRestored() can only be called from the system process"); 2069 } 2070 // TODO: If necessary, make it work for secondary users as well. This currently assumes 2071 // restores only to the primary user 2072 if (DEBUG) Slog.v(TAG, "settingsRestored"); 2073 WallpaperData wallpaper = null; 2074 boolean success = false; 2075 synchronized (mLock) { 2076 loadSettingsLocked(UserHandle.USER_SYSTEM, false); 2077 wallpaper = mWallpaperMap.get(UserHandle.USER_SYSTEM); 2078 wallpaper.wallpaperId = makeWallpaperIdLocked(); // always bump id at restore 2079 wallpaper.allowBackup = true; // by definition if it was restored 2080 if (wallpaper.nextWallpaperComponent != null 2081 && !wallpaper.nextWallpaperComponent.equals(mImageWallpaper)) { 2082 if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false, 2083 wallpaper, null)) { 2084 // No such live wallpaper or other failure; fall back to the default 2085 // live wallpaper (since the profile being restored indicated that the 2086 // user had selected a live rather than static one). 2087 bindWallpaperComponentLocked(null, false, false, wallpaper, null); 2088 } 2089 success = true; 2090 } else { 2091 // If there's a wallpaper name, we use that. If that can't be loaded, then we 2092 // use the default. 2093 if ("".equals(wallpaper.name)) { 2094 if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty"); 2095 success = true; 2096 } else { 2097 if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource"); 2098 success = restoreNamedResourceLocked(wallpaper); 2099 } 2100 if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success 2101 + " id=" + wallpaper.wallpaperId); 2102 if (success) { 2103 generateCrop(wallpaper); // based on the new image + metadata 2104 bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, true, false, 2105 wallpaper, null); 2106 } 2107 } 2108 } 2109 2110 if (!success) { 2111 Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'"); 2112 wallpaper.name = ""; 2113 getWallpaperDir(UserHandle.USER_SYSTEM).delete(); 2114 } 2115 2116 synchronized (mLock) { 2117 saveSettingsLocked(UserHandle.USER_SYSTEM); 2118 } 2119 } 2120 2121 // Restore the named resource bitmap to both source + crop files 2122 boolean restoreNamedResourceLocked(WallpaperData wallpaper) { 2123 if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) { 2124 String resName = wallpaper.name.substring(4); 2125 2126 String pkg = null; 2127 int colon = resName.indexOf(':'); 2128 if (colon > 0) { 2129 pkg = resName.substring(0, colon); 2130 } 2131 2132 String ident = null; 2133 int slash = resName.lastIndexOf('/'); 2134 if (slash > 0) { 2135 ident = resName.substring(slash+1); 2136 } 2137 2138 String type = null; 2139 if (colon > 0 && slash > 0 && (slash-colon) > 1) { 2140 type = resName.substring(colon+1, slash); 2141 } 2142 2143 if (pkg != null && ident != null && type != null) { 2144 int resId = -1; 2145 InputStream res = null; 2146 FileOutputStream fos = null; 2147 FileOutputStream cos = null; 2148 try { 2149 Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED); 2150 Resources r = c.getResources(); 2151 resId = r.getIdentifier(resName, null, null); 2152 if (resId == 0) { 2153 Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type 2154 + " ident=" + ident); 2155 return false; 2156 } 2157 2158 res = r.openRawResource(resId); 2159 if (wallpaper.wallpaperFile.exists()) { 2160 wallpaper.wallpaperFile.delete(); 2161 wallpaper.cropFile.delete(); 2162 } 2163 fos = new FileOutputStream(wallpaper.wallpaperFile); 2164 cos = new FileOutputStream(wallpaper.cropFile); 2165 2166 byte[] buffer = new byte[32768]; 2167 int amt; 2168 while ((amt=res.read(buffer)) > 0) { 2169 fos.write(buffer, 0, amt); 2170 cos.write(buffer, 0, amt); 2171 } 2172 // mWallpaperObserver will notice the close and send the change broadcast 2173 2174 Slog.v(TAG, "Restored wallpaper: " + resName); 2175 return true; 2176 } catch (NameNotFoundException e) { 2177 Slog.e(TAG, "Package name " + pkg + " not found"); 2178 } catch (Resources.NotFoundException e) { 2179 Slog.e(TAG, "Resource not found: " + resId); 2180 } catch (IOException e) { 2181 Slog.e(TAG, "IOException while restoring wallpaper ", e); 2182 } finally { 2183 IoUtils.closeQuietly(res); 2184 if (fos != null) { 2185 FileUtils.sync(fos); 2186 } 2187 if (cos != null) { 2188 FileUtils.sync(cos); 2189 } 2190 IoUtils.closeQuietly(fos); 2191 IoUtils.closeQuietly(cos); 2192 } 2193 } 2194 } 2195 return false; 2196 } 2197 2198 @Override 2199 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2200 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 2201 != PackageManager.PERMISSION_GRANTED) { 2202 2203 pw.println("Permission Denial: can't dump wallpaper service from from pid=" 2204 + Binder.getCallingPid() 2205 + ", uid=" + Binder.getCallingUid()); 2206 return; 2207 } 2208 2209 synchronized (mLock) { 2210 pw.println("System wallpaper state:"); 2211 for (int i = 0; i < mWallpaperMap.size(); i++) { 2212 WallpaperData wallpaper = mWallpaperMap.valueAt(i); 2213 pw.print(" User "); pw.print(wallpaper.userId); 2214 pw.print(": id="); pw.println(wallpaper.wallpaperId); 2215 pw.print(" mWidth="); 2216 pw.print(wallpaper.width); 2217 pw.print(" mHeight="); 2218 pw.println(wallpaper.height); 2219 pw.print(" mCropHint="); pw.println(wallpaper.cropHint); 2220 pw.print(" mPadding="); pw.println(wallpaper.padding); 2221 pw.print(" mName="); pw.println(wallpaper.name); 2222 pw.print(" mWallpaperComponent="); pw.println(wallpaper.wallpaperComponent); 2223 if (wallpaper.connection != null) { 2224 WallpaperConnection conn = wallpaper.connection; 2225 pw.print(" Wallpaper connection "); 2226 pw.print(conn); 2227 pw.println(":"); 2228 if (conn.mInfo != null) { 2229 pw.print(" mInfo.component="); 2230 pw.println(conn.mInfo.getComponent()); 2231 } 2232 pw.print(" mToken="); 2233 pw.println(conn.mToken); 2234 pw.print(" mService="); 2235 pw.println(conn.mService); 2236 pw.print(" mEngine="); 2237 pw.println(conn.mEngine); 2238 pw.print(" mLastDiedTime="); 2239 pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis()); 2240 } 2241 } 2242 pw.println("Lock wallpaper state:"); 2243 for (int i = 0; i < mLockWallpaperMap.size(); i++) { 2244 WallpaperData wallpaper = mLockWallpaperMap.valueAt(i); 2245 pw.print(" User "); pw.print(wallpaper.userId); 2246 pw.print(": id="); pw.println(wallpaper.wallpaperId); 2247 pw.print(" mWidth="); pw.print(wallpaper.width); 2248 pw.print(" mHeight="); pw.println(wallpaper.height); 2249 pw.print(" mCropHint="); pw.println(wallpaper.cropHint); 2250 pw.print(" mPadding="); pw.println(wallpaper.padding); 2251 pw.print(" mName="); pw.println(wallpaper.name); 2252 } 2253 2254 } 2255 } 2256} 2257