public static ArrayList<PFile> batchBuildThumbnail(final Context ctx, final ArrayList<File> files) {
 ArrayList<PFile> result = new ArrayList<PFile>();

 for (File f : files) {
 PFile pf = new PFile();
 try {
 if (f.exists() && f.canRead()) {
 //取出视频的一帧图像
 Bitmap bitmap = ThumbnailUtils.createVideoThumbnail(ctx, f.getAbsolutePath(), Video.Thumbnails.MINI_KIND);
 if (bitmap == null) {
 //缩略图创建失败
 bitmap = Bitmap.createBitmap(ThumbnailUtils.TARGET_SIZE_MINI_THUMBNAIL_WIDTH, ThumbnailUtils.TARGET_SIZE_MINI_THUMBNAIL_HEIGHT, Bitmap.Config.RGB_565);
 Log.e(TAG, "batchBuildThumbnail createBitmap faild : " + f.getAbsolutePath());
 }

 pf.width = bitmap.getWidth();
 pf.height = bitmap.getHeight();

 //缩略图
 bitmap = ThumbnailUtils.extractThumbnail(bitmap, ThumbnailUtils.dipToPX(ctx, ThumbnailUtils.TARGET_SIZE_MICRO_THUMBNAIL_WIDTH), ThumbnailUtils.dipToPX(ctx, ThumbnailUtils.TARGET_SIZE_MICRO_THUMBNAIL_HEIGHT), ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
 if (bitmap != null) {
 File thum = new File(f.getParent(), f.getName() + ".jpg");
 pf.thumb = thum.getAbsolutePath();
 //thum.createNewFile();
 FileOutputStream iStream = new FileOutputStream(thum);
 bitmap.compress(Bitmap.CompressFormat.JPEG, 85, iStream);
 iStream.close();
 }

 if (bitmap != null)
 bitmap.recycle();
 }
 } catch (Exception e) {
 Log.e(TAG, e);
 continue;
 } finally {
 result.add(pf);
 }
 }

 return result;

 } 

 <receiver android:name="io.vov.vitamio.MediaScannerReceiver" >
 <intent-filter>
 <action android:name="android.intent.action.BOOT_COMPLETED" />
 </intent-filter>
 <intent-filter>
 <action android:name="android.intent.action.MEDIA_MOUNTED" />

 <data android:scheme="file" />
 </intent-filter>
 <intent-filter>
 <action android:name="com.yixia.vitamio.action.MEDIA_SCANNER_SCAN_FILE" />
 <action android:name="com.yixia.vitamio.action.MEDIA_SCANNER_SCAN_DIRECTORY" />

 <data android:scheme="file" />
 </intent-filter>
 </receiver>

 <service
 android:name="io.vov.vitamio.MediaScannerService"
 android:exported="false" >
 <intent-filter>
 <action android:name="io.vov.vitamio.IMediaScannerService" />
 </intent-filter>
 </service>
 
 <service
 android:name="io.vov.vitamio.VitamioService"
 android:exported="false" >
 <intent-filter>
 <action android:name="io.vov.vitamio.IVitamioService" />
 </intent-filter>
 </service>

 if (!io.vov.vitamio.LibsChecker.checkVitamioLibs(this, getClass().getName(), R.string.init_decoders, R.raw.libarm))
 return;

 OPreference pref = new OPreference(this);
 //首次运行，扫描SD卡
 if (pref.getBoolean(PREF_KEY_FIRST, true)) {
 getApplicationContext().startService(new Intent(getApplicationContext(), MediaScannerService.class).putExtra(MediaScannerService.EXTRA_DIRECTORY, Environment.getExternalStorageDirectory().getAbsolutePath()));
 pref.putBooleanAndCommit(PREF_KEY_FIRST, false);
 }

private static final String[] PROJECTION_MEDIA = new String[] { Video.Media._ID, Video.Media.TITLE, Video.Media.TITLE_KEY, Video.Media.SIZE, Video.Media.DURATION, Video.Media.DATA, Video.Media.WIDTH, Video.Media.HEIGHT };
 private static final String ORDER_MEDIA_TITLE = Video.Media.TITLE_KEY + " COLLATE NOCASE ASC";
 
 @Override
 public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
 Log.e(TAG, "onCreateLoader");
 return new CursorLoader(mParent, Video.Media.CONTENT_URI, PROJECTION_MEDIA, null, null, ORDER_MEDIA_TITLE);
 }

 @Override
 public void onLoadFinished(Loader<Cursor> arg0, Cursor newCursor) {
 Log.e(TAG, "onLoadFinished" + newCursor.getCount());
 mAdapter.swapCursor(newCursor);
 mListView.setSelectionFromTop(mVisiablePosition, mVisiableTop);
 }

 @Override
 public void onLoaderReset(Loader<Cursor> arg0) {
 Log.e(TAG, "onLoaderReset");
 mAdapter.swapCursor(null);
 }