以下程式碼用於獲取 android raw目錄下視訊檔案的縮圖：

/**
 * 獲取 raw 下 指定視訊檔案的縮圖
 * @param aVideoName 
* @return
*/
private Drawable getThumbnail(String aVideoName)
{
    Drawable ret = null;
    int id = 0;
    try
{
        id = R.raw.class.getDeclaredField(aVideoName).getInt(this);
Uri  videoURI = Uri.parse("android.resource://" 
 
+ this.getPackageName() + "/" + id);
ret = getThumbnail(videoURI);
} catch ( IllegalAccessException aE )
    {
        aE.printStackTrace();
} catch ( NoSuchFieldException aE )
    {
        aE.printStackTrace();
}

    return ret;
}

private Drawable getThumbnail(Uri aVideoUri)
{
    MediaMetadataRetriever retriever = new 
 
MediaMetadataRetriever();
retriever.setDataSource(this, aVideoUri);
Bitmap bitmap = retriever
            .getFrameAtTime(1*1000*1000, MediaMetadataRetriever.OPTION_PREVIOUS_SYNC);
Drawable drawable = new BitmapDrawable(getResources(), bitmap);
    return drawable;
}