CallsActivity.java

public class CallActivity extends AppCompatActivity implements ICallActivity {

    CallPresenter presenter;
  
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_call);
        ButterKnife.bind(this);
        Picasso.with(this).load(R.drawable.operator_girl).transform(new CircleTransform()).into(operatorPhoto);
        presenter = new CallPresenter(this);
    }

  
  //etc
  
}