interface IWallpaperConnection {     void attachEngine(IWallpaperEngine engine);     ParcelFileDescriptor setWallpaper(String name); } oneway interface IWallpaperService {     void attach(IWallpaperConnection connection,             IBinder windowToken, int windowType, boolean isPreview,             int reqWidth, int reqHeight); } oneway interface IWallpaperEngine {     void setDesiredSize(int width, int height);     void setVisibility(boolean visible);     void dispatchPointer(in MotionEvent event);     void dispatchWallpaperCommand(String action, int x, int y,            int z, in Bundle extras);     void destroy(); }

private WallpaperManager mWallpaperManager = null; private WallpaperInfo mWallpaperInfo = null; private WallpaperConnection mWallpaperConnection = null; private Intent mWallpaperIntent;

mWallpaperManager = WallpaperManager.getInstance(this); mWallpaperInfo = mWallpaperManager.getWallpaperInfo();//如果返回null则说明当前不是动态壁纸 mWallpaperIntent = new Intent(WallpaperService.SERVICE_INTERFACE); mWallpaperIntent.setClassName(mWallpaperInfo.getPackageName(), mWallpaperInfo.getServiceName());

bindService(mIntent, this, Context.BIND_AUTO_CREATE); IWallpaperService mService;//这里有一个adil接口

public void onServiceConnected(ComponentName name, IBinder service) {                 mService = IWallpaperService.Stub.asInterface(service);                 try {                     mService.attach(this, view.getWindowToken(),                     //        WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY,                             WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA,                                   true, root.getWidth(), root.getHeight());                 } catch (RemoteException e) {                     Log.w("", "Failed attaching wallpaper; clearing", e);                 }         }