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Jatpack------LiveData
2022-07-02 22:06:00 【咋就那么爱学习】
一： LiveData的使用
MutableLiveData 继承了LiveData.
我们可以继承LiveData, 也可以继承MutableLiveData。
二：LiveDataBus的使用
LiveDataBus，发送消息
LiveDataBus，接受消息
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