How do I implement a ViewModel in my application?

How do I implement a ViewModel in my application?

To implement a ViewModel, you first need to create a class that extends ViewModel. This class will hold your UI-related data.

What are the benefits of using ViewModel?

ViewModels help manage UI-related data in a lifecycle-conscious way, allowing data to survive configuration changes.

Can you show me a simple code example?

Sure! Here's a basic example:

public class MyViewModel extends ViewModel {
    private MutableLiveData<String> data;

    public LiveData<String> getData() {
        if (data == null) {
            data = new MutableLiveData<>();
            loadData();
        }
        return data;
    }

    private void loadData() {
        // Load your data here
    }
}

How do I connect the ViewModel to my UI?

You can connect it using ViewModelProviders in your Activity or Fragment. For example:

MyViewModel viewModel = new ViewModelProvider(this).get(MyViewModel.class);
viewModel.getData().observe(this, data -> {
    // Update your UI here
});