Android ViewModel，项目列表，插入-处理状态

Question

My question is kind of not strictly precised. I have a Fragment with list of items that are backed up by REST API service:

GET /api/items

I have a ItemsViewModel class, ItemsProvider with LiveData objects and APIService that get the items from REST service. The implementation of ListFragment observes the ItemsViewModel and its state.

Now I have a question. How do you implement inserting data into ViewModel in your implementations? How do you handle state update?

Answer 1

You can take LiveData<List<? of items>> LiveData<List<? of items>> as MutableLiveData inside ItemsViewModel .

Now, when you've new items, you need to set your LiveData value.

You need to create an observer to that inside of your activity/fragment where you needed.