/**
 * 根據視訊位置 擷取第一幀
 */
public Bitmap createVideoThumbnail(String palyUrl, int kind) {
    Bitmap bitmap = null;
    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
    try {
        if (palyUrl.startsWith("http://")
                || palyUrl.startsWith("https://")
                || palyUrl.startsWith("widevine://"
 
)) {
            //網路視訊
retriever.setDataSource(palyUrl, new Hashtable<String, String>());
        } else {
            //本地視訊
retriever.setDataSource(palyUrl);
        }
        bitmap = retriever.getFrameAtTime(-1);
    } catch (Exception ex) {
        // Assume this is a corrupt video file
ex.printStackTrace();
    } finally 
 
{
        try {
            retriever.release();
        } catch (RuntimeException ex) {
            // Ignore failures while cleaning up.
ex.printStackTrace();
        }
    }

    if (bitmap == null) {
        return null;
    }

    if (kind == MediaStore.Images.Thumbnails.MINI_KIND) {
        // Scale down the bitmap if it's too large.
 
int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        int max = Math.max(width, height);
        if (max > 512) {
            float scale = 512f / max;
            int w = Math.round(scale * width);
            int h = Math.round(scale * height);
            bitmap = Bitmap.createScaledBitmap(bitmap, w, h, true);
        }
    } else if (kind == MediaStore.Images.Thumbnails.MICRO_KIND) {
        bitmap = ThumbnailUtils.extractThumbnail(bitmap,
                96,
                96,
                ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
    }
    return bitmap;
}