视频流媒体播放器EasyPlayer-RTSP-Android 如何随意切换播放视频流？

public void change() {
        if (mStreamRender != null) {
            sendResult(RESULT_REND_STOP, null);
            mStreamRender.stop();
        }

        boolean autoRecord = SPUtil.getAutoRecord(getContext());

        try {
            mStreamRender.start(mUrl,
                    mType,
Client.EASY_SDK_VIDEO_FRAME_FLAG |
 	Client.EASY_SDK_AUDIO_FRAME_FLAG,
                    "",
                    "",
                    autoRecord ? FileUtil.getMovieName(mUrl).getPath() : null);
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_LONG).show();
            return;
        }
    }