XML中真的需要连接字符串吗？(Connection string really needed in XML?)

 我不知道libgdx的正确方法名称，但简单的逻辑是你应该在更改状态时删除侦听器并在状态更改后再次设置侦听器。 
 
myBtn.addListener(null);
myBtn.setSelected([true|false]);
myBtn.addListener(new ChangeListener() {
        @Override
        public void changed(ChangeEvent event, Actor actor) {
            checkIfOtherButtnsPressed()
        }
    });

I don't know proper method names for libgdx but simple logic is you should remove listener when you change state and set listener again after state changed.
 
myBtn.addListener(null);
myBtn.setSelected([true|false]);
myBtn.addListener(new ChangeListener() {
        @Override
        public void changed(ChangeEvent event, Actor actor) {
            checkIfOtherButtnsPressed()
        }
    });