DialogFragment中的回收视图

@Override
public void onSaveInstanceState(@NonNull Bundle outState) {
    super.onSaveInstanceState(outState);
    // 保存需要恢复的状态
    outState.putString("key", "value");
}

@Override
public void onViewStateRestored(@Nullable Bundle savedInstanceState) {
    super.onViewStateRestored(savedInstanceState);
    if (savedInstanceState != null) {
        // 恢复状态
        String value = savedInstanceState.getString("key");
    }
}

public class MyViewModel extends ViewModel {
    private MutableLiveData<String> data = new MutableLiveData<>();

    public LiveData<String> getData() {
        return data;
    }

    public void setData(String value) {
        data.setValue(value);
    }
}

public class MyDialogFragment extends DialogFragment {
    private MyViewModel viewModel;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        viewModel = new ViewModelProvider(requireActivity()).get(MyViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.dialog_layout, container, false);
        // 使用 viewModel 中的数据
        viewModel.getData().observe(getViewLifecycleOwner(), data -> {
            // 更新 UI
        });
        return view;
    }
}