PopupWindow in Android responds to return key and closes

In the layout file (*.xml), choose a View that does not affect any operations. It is recommended to use the outermost Layout. Then set both Focusable and FocusableInTouchMode of the Layout to true. Get the instance of the View, now you can override the OnKeyListener() event for the View
 
LinearLayout  ll_layout = (LinearLayout )view.findViewById(R.id.ll_layout);
ll_layout.setOnKeyListener(newOnKeyListener()
{
    publicboolean onKey(View v, intkeyCode, KeyEvent event)
    {
        if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_BACK)
            pop.dismiss();
 
        returnfalse;
    }
});