Save audio in MySQL database

My name is Gonzalo and I am starting this in the development of mobile applications for android. The issue is that they commissioned me to make an app that records audios and that they are stored in a database, so that they can then be reproduced at random. I have already managed to record audios but these are stored temporarily only on the phone:

The code I am using is the following:

public class MainActivity extends Activity implements OnCompletionListener {
    TextView tv1;
    MediaRecorder recorder;
    MediaPlayer player;
    File archivo;
    TextView b1, b2, b3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv1 = (TextView) this.findViewById(R.id.textView1);
        b1 = (TextView) findViewById(R.id.button1);
        b2 = (TextView) findViewById(R.id.button2);
        b3 = (TextView) findViewById(R.id.escuchar);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void grabar(View v) {
        recorder = new MediaRecorder();
        recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        File path = new File(Environment.getExternalStorageDirectory()
                .getPath());
        try {
            archivo = File.createTempFile("temporal", ".3gp", path);
        } catch (IOException e) {
        }
        recorder.setOutputFile(archivo.getAbsolutePath());
        try {
            recorder.prepare();
        } catch (IOException e) {
        }
        recorder.start();
        tv1.setText("Grabando");
        b1.setEnabled(false);
        b2.setEnabled(true);
    }

    public void detener(View v) {
        recorder.stop();
        recorder.release();
        player = new MediaPlayer();
        player.setOnCompletionListener(this);
        try {
            player.setDataSource(archivo.getAbsolutePath());
        } catch (IOException e) {
        }
        try {
            player.prepare();
        } catch (IOException e) {
        }
        b1.setEnabled(true);
        b2.setEnabled(false);
        b3.setEnabled(true);
        tv1.setText("Listo para reproducir");
    }

    public void escuchar(View v) {
        player.start();
        b1.setEnabled(false);
        b2.setEnabled(false);
        b3.setEnabled(false);
        tv1.setText("Reproduciendo");
    }

    public void onCompletion(MediaPlayer mp) {
        b1.setEnabled(true);
        b2.setEnabled(true);
        b3.setEnabled(true);
        tv1.setText("Listo");
    }
}

I already appreciate your answers.