Question

public class SomeClass {
    public void SomeMethod() {
        GridView gv = new GridView(this);
        gv.setOnClickListener(new GridView.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
            }

        });
    }

    // Define onClick here and reference it somehow above?

}

How can I take the onClick method out of that block of code into the root of the class? Like you can do it on C#, for instance.

Answer 1

You can declare a Listener as any other class attribute:

public class HomeActivity extends Activity {

 public void SomeMethod() {
        GridView gv = new GridView(this);
        gv.setOnClickListener(gridClickedListener);
    }

 private GridView.OnClickListener gridClickedListener =  new GridView.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
            }

        });
}

Or implement the OnClickListener (or other) interfaces, but you will need to know which which view was clicked (switch inside the OnClick handler) if several views will report to this listener. I tend not to use this approach – it looks less readable for me.