BaseImageDownloader.java 文件源码

@TargetApi(Build.VERSION_CODES.FROYO)
private InputStream getVideoThumbnailStream(String filePath) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
        Bitmap bitmap = ThumbnailUtils
                .createVideoThumbnail(filePath, MediaStore.Images.Thumbnails.FULL_SCREEN_KIND);
        if (bitmap != null) {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bitmap.compress(CompressFormat.PNG, 0, bos);
            return new ByteArrayInputStream(bos.toByteArray());
        }
    }
    return null;
}