android 获取视频，图片缩略图

/** 
     * @param context 
     * @param cr
     * @param Videopath
     * @return 
     */
    public static Bitmap getVideoThumbnail(Context context, ContentResolver cr, String Videopath) { 
            ContentResolver testcr = context.getContentResolver(); 
            String[] projection = { MediaStore.Video.Media.DATA, MediaStore.Video.Media._ID, }; 
            String whereClause = MediaStore.Video.Media.DATA + " = '" + Videopath + "'"; 
            Cursor cursor = testcr.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, projection, whereClause, 
                            null, null); 
            int _id = 0; 
            String videoPath = ""; 
            if (cursor == null || cursor.getCount() == 0) { 
                    return null; 
            } 
            if (cursor.moveToFirst()) { 

                    int _idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID); 
                    int _dataColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATA); 
                    do { 
                            _id = cursor.getInt(_idColumn); 
                            videoPath = cursor.getString(_dataColumn); 
                    } while (cursor.moveToNext()); 
            } 
            cursor.close();
            BitmapFactory.Options options = new BitmapFactory.Options(); 
            options.inDither = false; 
            options.inPreferredConfig = Bitmap.Config.RGB_565; 
            Bitmap bitmap = MediaStore.Video.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND, 
                            options); 
            return bitmap; 
    }

/**
     * 获取视频缩略图
     * @param videoPath
     * @param width
     * @param height
     * @param kind
     * @return
     */
    private Bitmap getVideoThumbnail(String videoPath, int width , int height, int kind){
		Bitmap bitmap = null;
		bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);
		bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
		return bitmap;
    }

/** 
     *  
     * @param context 
     * @param cr
     * @param Imagepath 
     * @return 
     */
    public static Bitmap getImageThumbnail(Context context, ContentResolver cr, String Imagepath) { 
            ContentResolver testcr = context.getContentResolver(); 
            String[] projection = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID, }; 
            String whereClause = MediaStore.Images.Media.DATA + " = '" + Imagepath + "'"; 
            Cursor cursor = testcr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, whereClause, 
                            null, null); 
            int _id = 0; 
            String imagePath = ""; 
            if (cursor == null || cursor.getCount() == 0) { 
                    return null; 
            } 
            if (cursor.moveToFirst()) { 

                    int _idColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID); 
                    int _dataColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATA); 

                    do { 
                            _id = cursor.getInt(_idColumn); 
                            imagePath = cursor.getString(_dataColumn); 
                    } while (cursor.moveToNext()); 
            } 
            cursor.close();
            BitmapFactory.Options options = new BitmapFactory.Options(); 
            options.inDither = false; 
            options.inPreferredConfig = Bitmap.Config.RGB_565; 
            Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND, 
                            options); 
            return bitmap; 
    }