visualizer not working

[bogger98]

thnaks for great library in case it is of use to anyone this is simle implementation using just java

  public MediaPlayer mediaPlayer;
    BarVisualizer barVisualizer;
    RelativeLayout rel;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       // setContentView(R.layout.activity_main);
        rel=new RelativeLayout(this);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) ==
                    PackageManager.PERMISSION_GRANTED) {
                // put your code for Version>=Marshmallow
            } else {
                if (shouldShowRequestPermissionRationale(Manifest.permission.RECORD_AUDIO)) {
                    Toast.makeText(this,
                            "App required access to audio", Toast.LENGTH_SHORT).show();
                }
                requestPermissions(new String[]{Manifest.permission.RECORD_AUDIO
                }, 100);
            }

        } else {
            // will do later
        }

        mediaPlayer = MediaPlayer.create(this, R.raw.sample);
        mediaPlayer.start();
       int id= mediaPlayer.getAudioSessionId();
       if (id !=-1){
           System.out.println("aaaaaaaaaaaaaa   "+id);
           barVisualizer=new BarVisualizer(this);
           barVisualizer.setPlayer(id);//(mediaPlayer.getAudioSessionId());
           barVisualizer.setVisibility(View.VISIBLE);
           barVisualizer.setColor(Color.RED);
           barVisualizer.setDensity(80);
           rel.addView(barVisualizer);
           System.out.println("bbbbbbbbbbbbbb   "+id);
        }else{
           System.out.println("mediaplay id is null");
       }
       setContentView(rel);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (requestCode == 101) {
            if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(getApplicationContext(),
                        " record", Toast.LENGTH_SHORT).show();
            }
        }
    }
}