AwesomeButtonActivity_4.java

public class AwesomeButtonActivity extends AppCompatActivity implements View.OnClickListener {

    private Button awesomeButton;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        awesomeButton = new Button(this);

        awesomeButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        awesomeButtonClicked();
    }

    private void awesomeButtonClicked() {
        awesomeButton.setText("AWESOME!");
    }
    
}