Button gene;
ImageView image;
SeekBar ring_bar;
String collect;
private AudioManager am;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_prof);

    gene = (Button) findViewById(R.id.gene);
    image = (ImageView) findViewById(R.id.image);
    ring_bar = (SeekBar) findViewById(R.id.ring_bar);
    am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);

    int maxV = am.getStreamMaxVolume(AudioManager.STREAM_RING);
    int curV = am.getStreamVolume(AudioManager.STREAM_RING);
    ring_bar.setMax(maxV);
    ring_bar.setProgress(curV);
    ring_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onStopTrackingTouch(SeekBar arg0) {
        }

        @Override
        public void onStartTrackingTouch(SeekBar arg0) {
        }

        @Override
        public void onProgressChanged(SeekBar arg0, int progress, boolean arg2) {
            am.setStreamVolume(AudioManager.STREAM_RING, progress, 0);
        }
    });

    int ring = ring_bar.getProgress();

    String ringgg = Integer.toString(ring);

    collect = ringgg;

    gene.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
            try{
                BitMatrix bitMatrix = multiFormatWriter.encode(collect, BarcodeFormat.QR_CODE,200,200);
                BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
                Bitmap bitmap = barcodeEncoder.createBitmap(bitMatrix);
                image.setImageBitmap(bitmap);
            }
            catch (WriterException e){
                e.printStackTrace();
            }

        }
    });
}