How do I register for an event on an object without the need for an anonymous class?

Question

I'm creating an android app. I have a Dialog, and I want to handle the onCancel() event without using an anonymous class because it's cleaner and there are class variables I need access to from the main Activity class. I'm looking for a way to register for events on an object similar to .NET, where I can handle it in a separate method in the class without the need for an anonymous class.

Answer 1

There is a nice example here in the Event Listeners section.

The first example uses an anonymous class for the listener; the second uses a method inside the Activity. No extra class needed.

TL;DR Here is the code stolen from that page:

public class ExampleActivity extends Activity implements OnClickListener {
    protected void onCreate(Bundle savedValues) {
        ...
        Button button = (Button)findViewById(R.id.corky);
        button.setOnClickListener(this);
    }

    // Implement the OnClickListener callback
    public void onClick(View v) {
      // do something when the button is clicked
    }
    ...
}

You can modify this to use onCancel() .