Question

Given a PopupWindow defined like this:

public class MyWindow extends PopupWindow implements View.OnTouchListener {
    MyWindow(View view) {
        super(view);

        setHeight(view.getMeasuredHeight());
        setFocusable(true);
        setTouchable(true);
        setTouchInterceptor(this);
    }

    public boolean onTouch(View v, MotionEvent event) {
        System.out.println("onTouch()");
        return true;
    }
}

for some reason, onTouch() is never called.

What am I doing wrong? How can I get the PopupWindow to accept touch events?

Answer 1

As discussed in this answer to a different question, the PopupWindow needs to have a background Drawable explicitly set, even when it has been inflated from XML and doesn’t visually need a background set.

I fixed this by adding this line:

        setBackgroundDrawable(new ShapeDrawable());

to the constructor.