def init_widget(self):
        """ Set the checked state after all children have
        been populated.
        
        """
        super(AndroidPicker, self).init_widget()
        d = self.declaration
        w = self.widget
        if d.items:
            self.set_items(d.items)
        else:
            if d.max_value:
                self.set_max_value(d.max_value)
            if d.min_value:
                self.set_min_value(d.min_value)
        self.set_value(d.value)
        if d.wraps:
            self.set_wraps(d.wraps)

        if d.long_press_update_interval:
            self.set_long_press_update_interval(d.long_press_update_interval)

        w.setOnValueChangedListener(w.getId())
        w.onValueChange.connect(self.on_value_change)
Set the checked state after all children have
        been populated.