How to get an Audio Stream from Media Recorder in android

I want to make streaming audio recorder in android. I am not sure how to fetch audio stream and how to set buffer size of audio stream.

Below is my media recorder class

public class MyMediaRecorder {

    final MediaRecorder recorder = new MediaRecorder();
    final File path;

    /**
     * Creates a new audio recording at the given path (relative to root of SD
     * card).
     */
    public MyMediaRecorder(File path) {
        this.path = path;
    }



    /**
     * Starts a new recording.
     */
    public void start() throws IOException {
        String state = android.os.Environment.getExternalStorageState();
        if (!state.equals(android.os.Environment.MEDIA_MOUNTED)) {
            throw new IOException("SD Card is not mounted.  It is " + state
                    + ".");
        }

        // make sure the directory we plan to store the recording in exists


        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setOutputFile(path.getAbsolutePath());
        recorder.prepare();
        recorder.start();
    }

    /**
     * Stops a recording that has been previously started.
     */
    public void stop() throws IOException {
        recorder.stop();
        recorder.release();
    }
}

on start of recording i need to fetch a buffer size and sent it to server parallely record audio. Should I use Audio Record and Audio track instaed of Media Recorder ? Please suggest what should i do

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