Mr Potato Head Android

public class MainActivity extends AppCompatActivity {

    CheckBox _rambut, _alis, _kumis, _janggut;
    ImageView _imgJanggut, _imgKumis, _imgRambut, _imgAlis;

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

        //Rambut
        _rambut = findViewById(R.id.rambut);
        _imgRambut = findViewById(R.id.imgRambut);

        //Jannggut
        _janggut = findViewById(R.id.janggut);
        _imgJanggut = findViewById(R.id.imgJanggut);

        //Alis
        _alis = findViewById(R.id.alis);
        _imgAlis = findViewById(R.id.imgAlis);

        //Kumis
        _kumis = findViewById(R.id.kumis);
        _imgKumis = findViewById(R.id.imgKumis);

        _imgRambut.setVisibility(View.INVISIBLE);
        _imgJanggut.setVisibility(View.INVISIBLE);
        _imgAlis.setVisibility(View.INVISIBLE);
        _imgKumis.setVisibility(View.INVISIBLE);

    }

    public void rambutClicked(View view) {
        if (view.getId() == R.id.checkbox) {
            if (_imgRambut.getVisibility() == View.INVISIBLE) {
                _imgRambut.setVisibility(View.VISIBLE);
            } else {
                _imgRambut.setVisibility(View.INVISIBLE);
            }
        }
    }

    public void alisClicked(View view) {
        if (view.getId() == R.id.checkbox2) {
            if (_imgAlis.getVisibility() == View.INVISIBLE) {
                _imgAlis.setVisibility(View.VISIBLE);
            } else {
                _imgAlis.setVisibility(View.INVISIBLE);
            }
        }
    }

    public void janggutClicked(View view) {
        if (view.getId() == R.id.checkbox4) {
            if (_imgJanggut.getVisibility() == View.INVISIBLE) {
                _imgJanggut.setVisibility(View.VISIBLE);
            } else {
                _imgJanggut.setVisibility(View.INVISIBLE);
            }
        }
    }

    public void kumisClicked(View view) {
        if (view.getId() == R.id.checkbox3) {
            if (_imgKumis.getVisibility() == View.INVISIBLE) {
                _imgKumis.setVisibility(View.VISIBLE);
            } else {
                _imgKumis.setVisibility(View.INVISIBLE);
            }
        }
    }
}