@Override
    public void setDataSource(Context context, Uri uri)
            throws IOException, IllegalArgumentException, SecurityException, IllegalStateException {
        setDataSource(context, uri, null);
    }
Sets the data source as a content Uri.

@param context the Context to use when resolving the Uri
@param uri the Content URI of the data you want to play
@throws IllegalStateException if it is called in an invalid state
IjkPlayerDemo/ijkplayer/src/main/java/tv/danmaku/ijk/media/player/IjkMediaPlayer.java