OnGenericMotionListener似乎不起作用

Question

This is really weird all other listeners work like onClick etc.. but this listener doesnt seem to be working, heres my code:

public class HeloActivity extends Activity implements OnGenericMotionListener{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        View root = findViewById(R.id.root  );
        root.setOnGenericMotionListener(this);
    }

    @Override
    public boolean onGenericMotion(View v, MotionEvent event) {
        // TODO Auto-generated method stub
        Log.d( "special",v.toString() ); 
        return false;
    }
}

why is this not working?

Answer 1

This is an old question, but I'm currently looking at the same thing so I'll add this for future reference.

It might be because Activity implements an onGenerericMotionEvent method which receives motion events, but you're also implementing the method from View - onGenericMotion in the same class.

The Android docs say to implement one or the other.

I've not tried how you're doing it, but I know it works by using a different class that implements OnGenericMotionListener and using setOnGenericMotionListener on the root view.

Answer 2

You do realize that you both implements the listener and then attach it to the view? At the very least it is redundant....

Thank you.