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WallpaperManagerService.javaAPI DocAndroid 5.1 API60122Thu Mar 12 22:22:42 GMT 2015com.android.server.wallpaper

WallpaperManagerService

public class WallpaperManagerService extends IWallpaperManager.Stub

Fields Summary
static final String
TAG
static final boolean
DEBUG
final Object
mLock
static final long
MIN_WALLPAPER_CRASH_TIME
Minimum time between crashes of a wallpaper service for us to consider restarting it vs. just reverting to the static wallpaper.
static final int
MAX_WALLPAPER_COMPONENT_LOG_LENGTH
static final String
WALLPAPER
static final String
WALLPAPER_INFO
final android.content.Context
mContext
final android.view.IWindowManager
mIWindowManager
final android.content.pm.IPackageManager
mIPackageManager
final MyPackageMonitor
mMonitor
WallpaperData
mLastWallpaper
final android.content.ComponentName
mImageWallpaper
Name of the component used to display bitmap wallpapers from either the gallery or built-in wallpapers.
android.util.SparseArray
mWallpaperMap
int
mCurrentUserId
Constructors Summary
public WallpaperManagerService(android.content.Context context)

        if (DEBUG) Slog.v(TAG, "WallpaperService startup");
        mContext = context;
        mImageWallpaper = ComponentName.unflattenFromString(
                context.getResources().getString(R.string.image_wallpaper_component));
        mIWindowManager = IWindowManager.Stub.asInterface(
                ServiceManager.getService(Context.WINDOW_SERVICE));
        mIPackageManager = AppGlobals.getPackageManager();
        mMonitor = new MyPackageMonitor();
        mMonitor.register(context, null, UserHandle.ALL, true);
        getWallpaperDir(UserHandle.USER_OWNER).mkdirs();
        loadSettingsLocked(UserHandle.USER_OWNER);
Methods Summary
voidattachServiceLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperConnection conn, com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        try {
            conn.mService.attach(conn, conn.mToken,
                    WindowManager.LayoutParams.TYPE_WALLPAPER, false,
                    wallpaper.width, wallpaper.height, wallpaper.padding);
        } catch (RemoteException e) {
            Slog.w(TAG, "Failed attaching wallpaper; clearing", e);
            if (!wallpaper.wallpaperUpdating) {
                bindWallpaperComponentLocked(null, false, false, wallpaper, null);
            }
        }
booleanbindWallpaperComponentLocked(android.content.ComponentName componentName, boolean force, boolean fromUser, com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper, android.os.IRemoteCallback reply)

        if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: componentName=" + componentName);
        // Has the component changed?
        if (!force) {
            if (wallpaper.connection != null) {
                if (wallpaper.wallpaperComponent == null) {
                    if (componentName == null) {
                        if (DEBUG) Slog.v(TAG, "bindWallpaperComponentLocked: still using default");
                        // Still using default wallpaper.
                        return true;
                    }
                } else if (wallpaper.wallpaperComponent.equals(componentName)) {
                    // Changing to same wallpaper.
                    if (DEBUG) Slog.v(TAG, "same wallpaper");
                    return true;
                }
            }
        }
        
        try {
            if (componentName == null) {
                componentName = WallpaperManager.getDefaultWallpaperComponent(mContext);
                if (componentName == null) {
                    // Fall back to static image wallpaper
                    componentName = mImageWallpaper;
                    //clearWallpaperComponentLocked();
                    //return;
                    if (DEBUG) Slog.v(TAG, "Using image wallpaper");
                }
            }
            int serviceUserId = wallpaper.userId;
            ServiceInfo si = mIPackageManager.getServiceInfo(componentName,
                    PackageManager.GET_META_DATA | PackageManager.GET_PERMISSIONS, serviceUserId);
            if (si == null) {
                // The wallpaper component we're trying to use doesn't exist
                Slog.w(TAG, "Attempted wallpaper " + componentName + " is unavailable");
                return false;
            }
            if (!android.Manifest.permission.BIND_WALLPAPER.equals(si.permission)) {
                String msg = "Selected service does not require "
                        + android.Manifest.permission.BIND_WALLPAPER
                        + ": " + componentName;
                if (fromUser) {
                    throw new SecurityException(msg);
                }
                Slog.w(TAG, msg);
                return false;
            }
            
            WallpaperInfo wi = null;
            
            Intent intent = new Intent(WallpaperService.SERVICE_INTERFACE);
            if (componentName != null && !componentName.equals(mImageWallpaper)) {
                // Make sure the selected service is actually a wallpaper service.
                List<ResolveInfo> ris =
                        mIPackageManager.queryIntentServices(intent,
                                intent.resolveTypeIfNeeded(mContext.getContentResolver()),
                                PackageManager.GET_META_DATA, serviceUserId);
                for (int i=0; i<ris.size(); i++) {
                    ServiceInfo rsi = ris.get(i).serviceInfo;
                    if (rsi.name.equals(si.name) &&
                            rsi.packageName.equals(si.packageName)) {
                        try {
                            wi = new WallpaperInfo(mContext, ris.get(i));
                        } catch (XmlPullParserException e) {
                            if (fromUser) {
                                throw new IllegalArgumentException(e);
                            }
                            Slog.w(TAG, e);
                            return false;
                        } catch (IOException e) {
                            if (fromUser) {
                                throw new IllegalArgumentException(e);
                            }
                            Slog.w(TAG, e);
                            return false;
                        }
                        break;
                    }
                }
                if (wi == null) {
                    String msg = "Selected service is not a wallpaper: "
                            + componentName;
                    if (fromUser) {
                        throw new SecurityException(msg);
                    }
                    Slog.w(TAG, msg);
                    return false;
                }
            }
            
            // Bind the service!
            if (DEBUG) Slog.v(TAG, "Binding to:" + componentName);
            WallpaperConnection newConn = new WallpaperConnection(wi, wallpaper);
            intent.setComponent(componentName);
            intent.putExtra(Intent.EXTRA_CLIENT_LABEL,
                    com.android.internal.R.string.wallpaper_binding_label);
            intent.putExtra(Intent.EXTRA_CLIENT_INTENT, PendingIntent.getActivityAsUser(
                    mContext, 0,
                    Intent.createChooser(new Intent(Intent.ACTION_SET_WALLPAPER),
                            mContext.getText(com.android.internal.R.string.chooser_wallpaper)),
                    0, null, new UserHandle(serviceUserId)));
            if (!mContext.bindServiceAsUser(intent, newConn,
                    Context.BIND_AUTO_CREATE | Context.BIND_SHOWING_UI,
                    new UserHandle(serviceUserId))) {
                String msg = "Unable to bind service: "
                        + componentName;
                if (fromUser) {
                    throw new IllegalArgumentException(msg);
                }
                Slog.w(TAG, msg);
                return false;
            }
            if (wallpaper.userId == mCurrentUserId && mLastWallpaper != null) {
                detachWallpaperLocked(mLastWallpaper);
            }
            wallpaper.wallpaperComponent = componentName;
            wallpaper.connection = newConn;
            newConn.mReply = reply;
            try {
                if (wallpaper.userId == mCurrentUserId) {
                    if (DEBUG)
                        Slog.v(TAG, "Adding window token: " + newConn.mToken);
                    mIWindowManager.addWindowToken(newConn.mToken,
                            WindowManager.LayoutParams.TYPE_WALLPAPER);
                    mLastWallpaper = wallpaper;
                }
            } catch (RemoteException e) {
            }
        } catch (RemoteException e) {
            String msg = "Remote exception for " + componentName + "\n" + e;
            if (fromUser) {
                throw new IllegalArgumentException(msg);
            }
            Slog.w(TAG, msg);
            return false;
        }
        return true;
private voidcheckPermission(java.lang.String permission)

        if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) {
            throw new SecurityException("Access denied to process: " + Binder.getCallingPid()
                    + ", must have permission " + permission);
        }
public voidclearWallpaper()

        if (DEBUG) Slog.v(TAG, "clearWallpaper");
        synchronized (mLock) {
            clearWallpaperLocked(false, UserHandle.getCallingUserId(), null);
        }
voidclearWallpaperComponentLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        wallpaper.wallpaperComponent = null;
        detachWallpaperLocked(wallpaper);
voidclearWallpaperLocked(boolean defaultFailed, int userId, android.os.IRemoteCallback reply)

        WallpaperData wallpaper = mWallpaperMap.get(userId);
        File f = new File(getWallpaperDir(userId), WALLPAPER);
        if (f.exists()) {
            f.delete();
        }
        final long ident = Binder.clearCallingIdentity();
        try {
            RuntimeException e = null;
            try {
                wallpaper.imageWallpaperPending = false;
                if (userId != mCurrentUserId) return;
                if (bindWallpaperComponentLocked(defaultFailed
                        ? mImageWallpaper
                                : null, true, false, wallpaper, reply)) {
                    return;
                }
            } catch (IllegalArgumentException e1) {
                e = e1;
            }

            // This can happen if the default wallpaper component doesn't
            // exist.  This should be a system configuration problem, but
            // let's not let it crash the system and just live with no
            // wallpaper.
            Slog.e(TAG, "Default wallpaper component not found!", e);
            clearWallpaperComponentLocked(wallpaper);
            if (reply != null) {
                try {
                    reply.sendResult(null);
                } catch (RemoteException e1) {
                }
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
voiddetachWallpaperLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        if (wallpaper.connection != null) {
            if (wallpaper.connection.mReply != null) {
                try {
                    wallpaper.connection.mReply.sendResult(null);
                } catch (RemoteException e) {
                }
                wallpaper.connection.mReply = null;
            }
            if (wallpaper.connection.mEngine != null) {
                try {
                    wallpaper.connection.mEngine.destroy();
                } catch (RemoteException e) {
                }
            }
            mContext.unbindService(wallpaper.connection);
            try {
                if (DEBUG)
                    Slog.v(TAG, "Removing window token: " + wallpaper.connection.mToken);
                mIWindowManager.removeWindowToken(wallpaper.connection.mToken);
            } catch (RemoteException e) {
            }
            wallpaper.connection.mService = null;
            wallpaper.connection.mEngine = null;
            wallpaper.connection = null;
        }
protected voiddump(java.io.FileDescriptor fd, java.io.PrintWriter pw, java.lang.String[] args)

        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
                != PackageManager.PERMISSION_GRANTED) {
            
            pw.println("Permission Denial: can't dump wallpaper service from from pid="
                    + Binder.getCallingPid()
                    + ", uid=" + Binder.getCallingUid());
            return;
        }

        synchronized (mLock) {
            pw.println("Current Wallpaper Service state:");
            for (int i = 0; i < mWallpaperMap.size(); i++) {
                WallpaperData wallpaper = mWallpaperMap.valueAt(i);
                pw.println(" User " + wallpaper.userId + ":");
                pw.print("  mWidth=");
                    pw.print(wallpaper.width);
                    pw.print(" mHeight=");
                    pw.println(wallpaper.height);
                pw.print("  mPadding="); pw.println(wallpaper.padding);
                pw.print("  mName=");  pw.println(wallpaper.name);
                pw.print("  mWallpaperComponent="); pw.println(wallpaper.wallpaperComponent);
                if (wallpaper.connection != null) {
                    WallpaperConnection conn = wallpaper.connection;
                    pw.print("  Wallpaper connection ");
                    pw.print(conn);
                    pw.println(":");
                    if (conn.mInfo != null) {
                        pw.print("    mInfo.component=");
                        pw.println(conn.mInfo.getComponent());
                    }
                    pw.print("    mToken=");
                    pw.println(conn.mToken);
                    pw.print("    mService=");
                    pw.println(conn.mService);
                    pw.print("    mEngine=");
                    pw.println(conn.mEngine);
                    pw.print("    mLastDiedTime=");
                    pw.println(wallpaper.lastDiedTime - SystemClock.uptimeMillis());
                }
            }
        }
protected voidfinalize()

        super.finalize();
        for (int i = 0; i < mWallpaperMap.size(); i++) {
            WallpaperData wallpaper = mWallpaperMap.valueAt(i);
            wallpaper.wallpaperObserver.stopWatching();
        }
private intgetAttributeInt(org.xmlpull.v1.XmlPullParser parser, java.lang.String name, int defValue)

        String value = parser.getAttributeValue(null, name);
        if (value == null) {
            return defValue;
        }
        return Integer.parseInt(value);
private android.graphics.PointgetDefaultDisplaySize()

        Point p = new Point();
        WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE);
        Display d = wm.getDefaultDisplay();
        d.getRealSize(p);
        return p;
public intgetHeightHint()

        synchronized (mLock) {
            WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId());
            return wallpaper.height;
        }
private intgetMaximumSizeDimension()

        WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE);
        Display d = wm.getDefaultDisplay();
        return d.getMaximumSizeDimension();
public java.lang.StringgetName()
Called by SystemBackupAgent

        // Verify caller is the system
        if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) {
            throw new RuntimeException("getName() can only be called from the system process");
        }
        synchronized (mLock) {
            return mWallpaperMap.get(0).name;
        }
public android.os.ParcelFileDescriptorgetWallpaper(android.app.IWallpaperManagerCallback cb, android.os.Bundle outParams)

        synchronized (mLock) {
            // This returns the current user's wallpaper, if called by a system service. Else it
            // returns the wallpaper for the calling user.
            int callingUid = Binder.getCallingUid();
            int wallpaperUserId = 0;
            if (callingUid == android.os.Process.SYSTEM_UID) {
                wallpaperUserId = mCurrentUserId;
            } else {
                wallpaperUserId = UserHandle.getUserId(callingUid);
            }
            WallpaperData wallpaper = mWallpaperMap.get(wallpaperUserId);
            try {
                if (outParams != null) {
                    outParams.putInt("width", wallpaper.width);
                    outParams.putInt("height", wallpaper.height);
                }
                wallpaper.callbacks.register(cb);
                File f = new File(getWallpaperDir(wallpaperUserId), WALLPAPER);
                if (!f.exists()) {
                    return null;
                }
                return ParcelFileDescriptor.open(f, MODE_READ_ONLY);
            } catch (FileNotFoundException e) {
                /* Shouldn't happen as we check to see if the file exists */
                Slog.w(TAG, "Error getting wallpaper", e);
            }
            return null;
        }
private static java.io.FilegetWallpaperDir(int userId)

        return Environment.getUserSystemDirectory(userId);
public android.app.WallpaperInfogetWallpaperInfo()

        int userId = UserHandle.getCallingUserId();
        synchronized (mLock) {
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper.connection != null) {
                return wallpaper.connection.mInfo;
            }
            return null;
        }
public intgetWidthHint()

        synchronized (mLock) {
            WallpaperData wallpaper = mWallpaperMap.get(UserHandle.getCallingUserId());
            return wallpaper.width;
        }
public booleanhasNamedWallpaper(java.lang.String name)

        synchronized (mLock) {
            List<UserInfo> users;
            long ident = Binder.clearCallingIdentity();
            try {
                users = ((UserManager) mContext.getSystemService(Context.USER_SERVICE)).getUsers();
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
            for (UserInfo user: users) {
                WallpaperData wd = mWallpaperMap.get(user.id);
                if (wd == null) {
                    // User hasn't started yet, so load her settings to peek at the wallpaper
                    loadSettingsLocked(user.id);
                    wd = mWallpaperMap.get(user.id);
                }
                if (wd != null && name.equals(wd.name)) {
                    return true;
                }
            }
        }
        return false;
private voidloadSettingsLocked(int userId)

        if (DEBUG) Slog.v(TAG, "loadSettingsLocked");
        
        JournaledFile journal = makeJournaledFile(userId);
        FileInputStream stream = null;
        File file = journal.chooseForRead();
        if (!file.exists()) {
            // This should only happen one time, when upgrading from a legacy system
            migrateFromOld();
        }
        WallpaperData wallpaper = mWallpaperMap.get(userId);
        if (wallpaper == null) {
            wallpaper = new WallpaperData(userId);
            mWallpaperMap.put(userId, wallpaper);
        }
        boolean success = false;
        try {
            stream = new FileInputStream(file);
            XmlPullParser parser = Xml.newPullParser();
            parser.setInput(stream, null);

            int type;
            do {
                type = parser.next();
                if (type == XmlPullParser.START_TAG) {
                    String tag = parser.getName();
                    if ("wp".equals(tag)) {
                        wallpaper.width = Integer.parseInt(parser.getAttributeValue(null, "width"));
                        wallpaper.height = Integer.parseInt(parser
                                .getAttributeValue(null, "height"));
                        wallpaper.padding.left = getAttributeInt(parser, "paddingLeft", 0);
                        wallpaper.padding.top = getAttributeInt(parser, "paddingTop", 0);
                        wallpaper.padding.right = getAttributeInt(parser, "paddingRight", 0);
                        wallpaper.padding.bottom = getAttributeInt(parser, "paddingBottom", 0);
                        wallpaper.name = parser.getAttributeValue(null, "name");
                        String comp = parser.getAttributeValue(null, "component");
                        wallpaper.nextWallpaperComponent = comp != null
                                ? ComponentName.unflattenFromString(comp)
                                : null;
                        if (wallpaper.nextWallpaperComponent == null
                                || "android".equals(wallpaper.nextWallpaperComponent
                                        .getPackageName())) {
                            wallpaper.nextWallpaperComponent = mImageWallpaper;
                        }
                          
                        if (DEBUG) {
                            Slog.v(TAG, "mWidth:" + wallpaper.width);
                            Slog.v(TAG, "mHeight:" + wallpaper.height);
                            Slog.v(TAG, "mName:" + wallpaper.name);
                            Slog.v(TAG, "mNextWallpaperComponent:"
                                    + wallpaper.nextWallpaperComponent);
                        }
                    }
                }
            } while (type != XmlPullParser.END_DOCUMENT);
            success = true;
        } catch (FileNotFoundException e) {
            Slog.w(TAG, "no current wallpaper -- first boot?");
        } catch (NullPointerException e) {
            Slog.w(TAG, "failed parsing " + file + " " + e);
        } catch (NumberFormatException e) {
            Slog.w(TAG, "failed parsing " + file + " " + e);
        } catch (XmlPullParserException e) {
            Slog.w(TAG, "failed parsing " + file + " " + e);
        } catch (IOException e) {
            Slog.w(TAG, "failed parsing " + file + " " + e);
        } catch (IndexOutOfBoundsException e) {
            Slog.w(TAG, "failed parsing " + file + " " + e);
        }
        try {
            if (stream != null) {
                stream.close();
            }
        } catch (IOException e) {
            // Ignore
        }

        if (!success) {
            wallpaper.width = -1;
            wallpaper.height = -1;
            wallpaper.padding.set(0, 0, 0, 0);
            wallpaper.name = "";
        }

        // We always want to have some reasonable width hint.
        int baseSize = getMaximumSizeDimension();
        if (wallpaper.width < baseSize) {
            wallpaper.width = baseSize;
        }
        if (wallpaper.height < baseSize) {
            wallpaper.height = baseSize;
        }
private static com.android.internal.util.JournaledFilemakeJournaledFile(int userId)

        final String base = new File(getWallpaperDir(userId), WALLPAPER_INFO).getAbsolutePath();
        return new JournaledFile(new File(base), new File(base + ".tmp"));
private voidmigrateFromOld()

        File oldWallpaper = new File(WallpaperBackupHelper.WALLPAPER_IMAGE_KEY);
        File oldInfo = new File(WallpaperBackupHelper.WALLPAPER_INFO_KEY);
        if (oldWallpaper.exists()) {
            File newWallpaper = new File(getWallpaperDir(0), WALLPAPER);
            oldWallpaper.renameTo(newWallpaper);
        }
        if (oldInfo.exists()) {
            File newInfo = new File(getWallpaperDir(0), WALLPAPER_INFO);
            oldInfo.renameTo(newInfo);
        }
private voidnotifyCallbacksLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        final int n = wallpaper.callbacks.beginBroadcast();
        for (int i = 0; i < n; i++) {
            try {
                wallpaper.callbacks.getBroadcastItem(i).onWallpaperChanged();
            } catch (RemoteException e) {

                // The RemoteCallbackList will take care of removing
                // the dead object for us.
            }
        }
        wallpaper.callbacks.finishBroadcast();
        final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED);
        mContext.sendBroadcastAsUser(intent, new UserHandle(mCurrentUserId));
voidonRemoveUser(int userId)

        if (userId < 1) return;
        synchronized (mLock) {
            onStoppingUser(userId);
            File wallpaperFile = new File(getWallpaperDir(userId), WALLPAPER);
            wallpaperFile.delete();
            File wallpaperInfoFile = new File(getWallpaperDir(userId), WALLPAPER_INFO);
            wallpaperInfoFile.delete();
        }
voidonStoppingUser(int userId)

        if (userId < 1) return;
        synchronized (mLock) {
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper != null) {
                if (wallpaper.wallpaperObserver != null) {
                    wallpaper.wallpaperObserver.stopWatching();
                    wallpaper.wallpaperObserver = null;
                }
                mWallpaperMap.remove(userId);
            }
        }
booleanrestoreNamedResourceLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        if (wallpaper.name.length() > 4 && "res:".equals(wallpaper.name.substring(0, 4))) {
            String resName = wallpaper.name.substring(4);

            String pkg = null;
            int colon = resName.indexOf(':");
            if (colon > 0) {
                pkg = resName.substring(0, colon);
            }

            String ident = null;
            int slash = resName.lastIndexOf('/");
            if (slash > 0) {
                ident = resName.substring(slash+1);
            }

            String type = null;
            if (colon > 0 && slash > 0 && (slash-colon) > 1) {
                type = resName.substring(colon+1, slash);
            }

            if (pkg != null && ident != null && type != null) {
                int resId = -1;
                InputStream res = null;
                FileOutputStream fos = null;
                try {
                    Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED);
                    Resources r = c.getResources();
                    resId = r.getIdentifier(resName, null, null);
                    if (resId == 0) {
                        Slog.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type
                                + " ident=" + ident);
                        return false;
                    }

                    res = r.openRawResource(resId);
                    if (wallpaper.wallpaperFile.exists()) {
                        wallpaper.wallpaperFile.delete();
                    }
                    fos = new FileOutputStream(wallpaper.wallpaperFile);

                    byte[] buffer = new byte[32768];
                    int amt;
                    while ((amt=res.read(buffer)) > 0) {
                        fos.write(buffer, 0, amt);
                    }
                    // mWallpaperObserver will notice the close and send the change broadcast

                    Slog.v(TAG, "Restored wallpaper: " + resName);
                    return true;
                } catch (NameNotFoundException e) {
                    Slog.e(TAG, "Package name " + pkg + " not found");
                } catch (Resources.NotFoundException e) {
                    Slog.e(TAG, "Resource not found: " + resId);
                } catch (IOException e) {
                    Slog.e(TAG, "IOException while restoring wallpaper ", e);
                } finally {
                    if (res != null) {
                        try {
                            res.close();
                        } catch (IOException ex) {}
                    }
                    if (fos != null) {
                        FileUtils.sync(fos);
                        try {
                            fos.close();
                        } catch (IOException ex) {}
                    }
                }
            }
        }
        return false;
private voidsaveSettingsLocked(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        JournaledFile journal = makeJournaledFile(wallpaper.userId);
        FileOutputStream stream = null;
        try {
            stream = new FileOutputStream(journal.chooseForWrite(), false);
            XmlSerializer out = new FastXmlSerializer();
            out.setOutput(stream, "utf-8");
            out.startDocument(null, true);

            out.startTag(null, "wp");
            out.attribute(null, "width", Integer.toString(wallpaper.width));
            out.attribute(null, "height", Integer.toString(wallpaper.height));
            if (wallpaper.padding.left != 0) {
                out.attribute(null, "paddingLeft", Integer.toString(wallpaper.padding.left));
            }
            if (wallpaper.padding.top != 0) {
                out.attribute(null, "paddingTop", Integer.toString(wallpaper.padding.top));
            }
            if (wallpaper.padding.right != 0) {
                out.attribute(null, "paddingRight", Integer.toString(wallpaper.padding.right));
            }
            if (wallpaper.padding.bottom != 0) {
                out.attribute(null, "paddingBottom", Integer.toString(wallpaper.padding.bottom));
            }
            out.attribute(null, "name", wallpaper.name);
            if (wallpaper.wallpaperComponent != null
                    && !wallpaper.wallpaperComponent.equals(mImageWallpaper)) {
                out.attribute(null, "component",
                        wallpaper.wallpaperComponent.flattenToShortString());
            }
            out.endTag(null, "wp");

            out.endDocument();
            stream.close();
            journal.commit();
        } catch (IOException e) {
            try {
                if (stream != null) {
                    stream.close();
                }
            } catch (IOException ex) {
                // Ignore
            }
            journal.rollback();
        }
public voidsetDimensionHints(int width, int height)

        checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS);
        synchronized (mLock) {
            int userId = UserHandle.getCallingUserId();
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper == null) {
                throw new IllegalStateException("Wallpaper not yet initialized for user " + userId);
            }
            if (width <= 0 || height <= 0) {
                throw new IllegalArgumentException("width and height must be > 0");
            }
            // Make sure it is at least as large as the display.
            Point displaySize = getDefaultDisplaySize();
            width = Math.max(width, displaySize.x);
            height = Math.max(height, displaySize.y);

            if (width != wallpaper.width || height != wallpaper.height) {
                wallpaper.width = width;
                wallpaper.height = height;
                saveSettingsLocked(wallpaper);
                if (mCurrentUserId != userId) return; // Don't change the properties now
                if (wallpaper.connection != null) {
                    if (wallpaper.connection.mEngine != null) {
                        try {
                            wallpaper.connection.mEngine.setDesiredSize(
                                    width, height);
                        } catch (RemoteException e) {
                        }
                        notifyCallbacksLocked(wallpaper);
                    } else if (wallpaper.connection.mService != null) {
                        // We've attached to the service but the engine hasn't attached back to us
                        // yet. This means it will be created with the previous dimensions, so we
                        // need to update it to the new dimensions once it attaches.
                        wallpaper.connection.mDimensionsChanged = true;
                    }
                }
            }
        }
public voidsetDisplayPadding(android.graphics.Rect padding)

        checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS);
        synchronized (mLock) {
            int userId = UserHandle.getCallingUserId();
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper == null) {
                throw new IllegalStateException("Wallpaper not yet initialized for user " + userId);
            }
            if (padding.left < 0 || padding.top < 0 || padding.right < 0 || padding.bottom < 0) {
                throw new IllegalArgumentException("padding must be positive: " + padding);
            }

            if (!padding.equals(wallpaper.padding)) {
                wallpaper.padding.set(padding);
                saveSettingsLocked(wallpaper);
                if (mCurrentUserId != userId) return; // Don't change the properties now
                if (wallpaper.connection != null) {
                    if (wallpaper.connection.mEngine != null) {
                        try {
                            wallpaper.connection.mEngine.setDisplayPadding(padding);
                        } catch (RemoteException e) {
                        }
                        notifyCallbacksLocked(wallpaper);
                    } else if (wallpaper.connection.mService != null) {
                        // We've attached to the service but the engine hasn't attached back to us
                        // yet. This means it will be created with the previous dimensions, so we
                        // need to update it to the new dimensions once it attaches.
                        wallpaper.connection.mPaddingChanged = true;
                    }
                }
            }
        }
public android.os.ParcelFileDescriptorsetWallpaper(java.lang.String name)

        checkPermission(android.Manifest.permission.SET_WALLPAPER);
        synchronized (mLock) {
            if (DEBUG) Slog.v(TAG, "setWallpaper");
            int userId = UserHandle.getCallingUserId();
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper == null) {
                throw new IllegalStateException("Wallpaper not yet initialized for user " + userId);
            }
            final long ident = Binder.clearCallingIdentity();
            try {
                ParcelFileDescriptor pfd = updateWallpaperBitmapLocked(name, wallpaper);
                if (pfd != null) {
                    wallpaper.imageWallpaperPending = true;
                }
                return pfd;
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
public voidsetWallpaperComponent(android.content.ComponentName name)

        checkPermission(android.Manifest.permission.SET_WALLPAPER_COMPONENT);
        synchronized (mLock) {
            if (DEBUG) Slog.v(TAG, "setWallpaperComponent name=" + name);
            int userId = UserHandle.getCallingUserId();
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper == null) {
                throw new IllegalStateException("Wallpaper not yet initialized for user " + userId);
            }
            final long ident = Binder.clearCallingIdentity();
            try {
                wallpaper.imageWallpaperPending = false;
                bindWallpaperComponentLocked(name, false, true, wallpaper, null);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
public voidsettingsRestored()

        // Verify caller is the system
        if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) {
            throw new RuntimeException("settingsRestored() can only be called from the system process");
        }
        // TODO: If necessary, make it work for secondary users as well. This currently assumes
        // restores only to the primary user
        if (DEBUG) Slog.v(TAG, "settingsRestored");
        WallpaperData wallpaper = null;
        boolean success = false;
        synchronized (mLock) {
            loadSettingsLocked(0);
            wallpaper = mWallpaperMap.get(0);
            if (wallpaper.nextWallpaperComponent != null
                    && !wallpaper.nextWallpaperComponent.equals(mImageWallpaper)) {
                if (!bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false,
                        wallpaper, null)) {
                    // No such live wallpaper or other failure; fall back to the default
                    // live wallpaper (since the profile being restored indicated that the
                    // user had selected a live rather than static one).
                    bindWallpaperComponentLocked(null, false, false, wallpaper, null);
                }
                success = true;
            } else {
                // If there's a wallpaper name, we use that.  If that can't be loaded, then we
                // use the default.
                if ("".equals(wallpaper.name)) {
                    if (DEBUG) Slog.v(TAG, "settingsRestored: name is empty");
                    success = true;
                } else {
                    if (DEBUG) Slog.v(TAG, "settingsRestored: attempting to restore named resource");
                    success = restoreNamedResourceLocked(wallpaper);
                }
                if (DEBUG) Slog.v(TAG, "settingsRestored: success=" + success);
                if (success) {
                    bindWallpaperComponentLocked(wallpaper.nextWallpaperComponent, false, false,
                            wallpaper, null);
                }
            }
        }

        if (!success) {
            Slog.e(TAG, "Failed to restore wallpaper: '" + wallpaper.name + "'");
            wallpaper.name = "";
            getWallpaperDir(0).delete();
        }

        synchronized (mLock) {
            saveSettingsLocked(wallpaper);
        }
voidswitchUser(int userId, android.os.IRemoteCallback reply)

        synchronized (mLock) {
            mCurrentUserId = userId;
            WallpaperData wallpaper = mWallpaperMap.get(userId);
            if (wallpaper == null) {
                wallpaper = new WallpaperData(userId);
                mWallpaperMap.put(userId, wallpaper);
                loadSettingsLocked(userId);
            }
            // Not started watching yet, in case wallpaper data was loaded for other reasons.
            if (wallpaper.wallpaperObserver == null) {
                wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper);
                wallpaper.wallpaperObserver.startWatching();
            }
            switchWallpaper(wallpaper, reply);
        }
voidswitchWallpaper(com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper, android.os.IRemoteCallback reply)

        synchronized (mLock) {
            RuntimeException e = null;
            try {
                ComponentName cname = wallpaper.wallpaperComponent != null ?
                        wallpaper.wallpaperComponent : wallpaper.nextWallpaperComponent;
                if (bindWallpaperComponentLocked(cname, true, false, wallpaper, reply)) {
                    return;
                }
            } catch (RuntimeException e1) {
                e = e1;
            }
            Slog.w(TAG, "Failure starting previous wallpaper", e);
            clearWallpaperLocked(false, wallpaper.userId, reply);
        }
public voidsystemRunning()

        if (DEBUG) Slog.v(TAG, "systemReady");
        WallpaperData wallpaper = mWallpaperMap.get(UserHandle.USER_OWNER);
        switchWallpaper(wallpaper, null);
        wallpaper.wallpaperObserver = new WallpaperObserver(wallpaper);
        wallpaper.wallpaperObserver.startWatching();

        IntentFilter userFilter = new IntentFilter();
        userFilter.addAction(Intent.ACTION_USER_REMOVED);
        userFilter.addAction(Intent.ACTION_USER_STOPPING);
        mContext.registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (Intent.ACTION_USER_REMOVED.equals(action)) {
                    onRemoveUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE,
                            UserHandle.USER_NULL));
                }
                // TODO: Race condition causing problems when cleaning up on stopping a user.
                // Comment this out for now.
                // else if (Intent.ACTION_USER_STOPPING.equals(action)) {
                //     onStoppingUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE,
                //             UserHandle.USER_NULL));
                // }
            }
        }, userFilter);

        try {
            ActivityManagerNative.getDefault().registerUserSwitchObserver(
                    new IUserSwitchObserver.Stub() {
                        @Override
                        public void onUserSwitching(int newUserId, IRemoteCallback reply) {
                            switchUser(newUserId, reply);
                        }

                        @Override
                        public void onUserSwitchComplete(int newUserId) throws RemoteException {
                        }
                    });
        } catch (RemoteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
android.os.ParcelFileDescriptorupdateWallpaperBitmapLocked(java.lang.String name, com.android.server.wallpaper.WallpaperManagerService$WallpaperData wallpaper)

        if (name == null) name = "";
        try {
            File dir = getWallpaperDir(wallpaper.userId);
            if (!dir.exists()) {
                dir.mkdir();
                FileUtils.setPermissions(
                        dir.getPath(),
                        FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH,
                        -1, -1);
            }
            File file = new File(dir, WALLPAPER);
            ParcelFileDescriptor fd = ParcelFileDescriptor.open(file,
                    MODE_CREATE|MODE_READ_WRITE|MODE_TRUNCATE);
            if (!SELinux.restorecon(file)) {
                return null;
            }
            wallpaper.name = name;
            return fd;
        } catch (FileNotFoundException e) {
            Slog.w(TAG, "Error setting wallpaper", e);
        }
        return null;