Question

当我启动Android应用程序时，我登录Realm Object Server并从Realm Server Object下载（同步）数据。好。现在我得到片段显示人员名单。

这里代码：

public class PersonsFragment extends Fragment {
    private ListView notEmptytsListView;
    private Realm realm;
    private RealmResults<Person> personsRealmResults;
    private PersonsAdapter personsAdapter; // RealmBaseAdapter<Organization>
    private RealmChangeListener realmChangeListener;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.persons_fragment, container, false);
        init(rootView);
        return rootView;
    }

    private void init(View view) {
        realm = Realm.getDefaultInstance();
        notEmptytsListView = (ListView) view.findViewById(R.id.notEmptytsListView);
        personsRealmResults = realm.where(Person.class).findAllSorted(Person.NAME);
        personsAdapter = new PersonsAdapter(personsRealmResults);
        notEmptytsListView.setAdapter(personsAdapter);

        // NOT CALL WHEN DATA ON REALM OBJECT SERVER WAS CHANGED
       realmChangeListener = new RealmChangeListener() {
            @Override
            public void onChange(Object object) {
                personsAdapter.notifyDataSetChanged();
            }
        };
        personsRealmResults.addChangeListener(realmChangeListener);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        realm.removeChangeListener(realmChangeListener);
        realm.close();
    }
}

如果我继续使用Fragm并在Realm Object Server（远程Realm）上更改数据，则本地数据不会同步。不调用onChanged（）方法。

我如何解决这个问题？

Answer 1

public class MyFragment extends Fragment {    
    RealmResults<Person> personsRealmResults; // <--

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.persons_fragment, container, false);
        notEmptytsListView = (ListView) view.findViewById(R.id.notEmptytsListView);

        realm = Realm.getDefaultInstance();
        personsRealmResults = realm.where(Person.class).findAllSorted(Person.NAME);
        personsAdapter = new PersonsAdapter(personsRealmResults);
        notEmptytsListView.setAdapter(personsAdapter);

        realmChangeListener = new RealmChangeListener() {
            @Override
            public void onChange(Object object) {
              // call when data on Realm Object Server was changed
         }
        };
        personsRealmResults.addChangeListener(realmChangeListener);
        return rootView;
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        realm.removeChangeListener(realmChangeListener);
        realm.close();
    }
}

虽然PersonsAdapter是RealmBaseAdapter可能会更容易。（见docs）

远程Realm（在Realm Object Server上）更改时不通知Fragment

1 个答案: