def init_widget(self):
        """ Initialize the underlying widget.

        """
        super(AndroidTabLayout, self).init_widget()
        w = self.widget
        w.addOnTabSelectedListener(w.getId())
        w.onTabSelected.connect(self.on_tab_selected)
        w.onTabUnselected.connect(self.on_tab_unselected)
Initialize the underlying widget.