Android Java DataStore多页面使用_android datastore java

 
public class FirstFragment extends Fragment {
 
 static RxDataStore<Preferences> dataStore;
 
  public static RxDataStore<Preferences> SettingDataStore() {
        return dataStore;
    }
 
 @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        dataStore = new RxPreferenceDataStoreBuilder(getContext(), "setting").build();
    }
 
  public View onCreateView(
            LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState
    ) {
 
        Preferences.Key<String> CHOOSED_NOTE=PreferencesKeys.stringKey("CHOOSED_NOTE");
        Flowable<String> chooseNote=   dataStore.data().map(prefs -> prefs.get(CHOOSED_NOTE));
        // 调用
        choose_note= chooseNote.blockingFirst();
 
        }catch (Exception e){
        }
 
 
}

      
 
public class SecondFragment extends DialogFragment {
 
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
           
        RxDataStore<Preferences> dataStore = SettingDataStore();
           Preferences.Key<String> CHOOSED_NOTE = PreferencesKeys.stringKey("CHOOSED_NOTE");
 
                //设置
                Single<Preferences> updateResult = dataStore.updateDataAsync(prefsIn -> {
                    MutablePreferences mutablePreferences = prefsIn.toMutablePreferences();
                    mutablePreferences.set(CHOOSED_NOTE, clickPath);
 
                    return Single.just(mutablePreferences);
                });
 
 
        return view;
    }