What is wrong here? Thanks in advance

Question

There is compile error

MainActivity.java

public class MainActivity extends AppCompatActivity implements MainActivityView {
    TextView counter;
    Button button;
    MainActivityPresenter presenter;

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

        presenter = new MainActivityPresenter(this);

        counter = (TextView) findViewById(R.id.textView);
        button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int count = Integer.parseInt(counter.getText().toString());
                presenter.updateTextViewText(Integer.toString(count + 1));
            }
        });
    }

    @Override
    public void changeTextViewText(String text) {
        counter.setText(text);
    }

}

MainActivityView.java

public interface MainActivityView {

  void changeTextViewText(String text);

}

MainActivityPresenter.java

public class MainActivityPresenter {
  MainActivityView view;

  public void MainActivityPresenter(MainActivityView view) {
    this.view = view;
  }

  public void updateTextViewText(String text) {
    view.changeTextViewText(text);
  }


}

Answer 1 · 2017-05-31T21:29:53Z

May 31, 2017 9:29pm

In MainActivityPresenter you've added a return type to the constructor. Take that out and you've got it:

public class MainActivityPresenter {
  MainActivityView view;

  public MainActivityPresenter(MainActivityView view) {
    this.view = view;
  }

  public void updateTextViewText(String text) {
    view.changeTextViewText(text);
  }
}

Hope that helps!

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Navrozbek Akhmedov

Navrozbek Akhmedov

What is wrong here? Thanks in advance

1 Answer

Ben Deitch

Ben Deitch