testing in android

Question

Challenge Task 1 of 1

Here's a simple counter app consisting of only a TextView and a Button. When the Button is pressed the counter (TextView) increases by one.

Refactor this to now use a View and Presenter.

MainActivity.java

public class MainActivity extends AppCompatActivity {
    TextView counter;
    Button button;

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

        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());
                counter.setText(Integer.toString(count + 1));
            }
        });
    }
}

MainActivityView.java

public interface MainActivityView {
    void changeTextViewText(String text);
}

MainActivityPresenter.java

public class MainActivityPresenter {
    MainActivityView view;

    public MainActivityPresenter(MainActivityPresenter view) {
        this.Presenterview.(view);
    } // MainActivityPresenter()

    public void buttonClicked(String text) {
        view.changeTextViewText(text);
    } // editTextUpdated()
}

Answer 1 · 2017-04-19T19:32:45Z

April 19, 2017 7:32pm

You still need to implement the MainActivityView interface in MainActivity.

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princess mudyahoto

princess mudyahoto

testing in android

1 Answer

Seth Kroger

Seth Kroger