来自错误线程的领域访问。只能在创建它们的线程上访问 Realm 对象，同时尝试在内部 spinnerlistener 中使用

Question

我有一个像这样使用领域的片段

String selectedLang;
Realm realm;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.user_profile, container, false);
        ButterKnife.bind(this, rootView);
        realm = Realm.getDefaultInstance();
        loginDatas = realm.where(LoginData.class).findFirst();
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            selectedLang = langList.get(position);
//tried this, still not working, added runOnUiThread and that also didn't work
/*Realm realGuys = Realm.getDefaultInstance();
                realGuys.executeTransactionAsync(new Realm.Transaction() {
                    @Override
                    public void execute(Realm realm) {
                        loginDatas.getUser().setLanguage(selectedLang);
                        realm.insertOrUpdate(loginDatas);
                    }
                }, new Realm.Transaction.OnSuccess() {
                    @Override
                    public void onSuccess() {
                        FragmentTransaction ft = getFragmentManager().beginTransaction();
                        ft.detach(UserFragment.this).attach(UserFragment.this).commit();
                    }
                }, new Realm.Transaction.OnError() {
                    @Override
                    public void onError(Throwable error) {
                        error.printStackTrace();
                    }
                });*/
            realm.executeTransactionAsync(new Realm.Transaction() {
                @Override
                public void execute(Realm realm) {
//getting the exception below here
                    loginDatas.getUser().setLanguage(selectedLang);
                    realm.insertOrUpdate(loginDatas);
                }
            }, new Realm.Transaction.OnSuccess() {
                @Override
                public void onSuccess() {
                    FragmentTransaction ft = getFragmentManager().beginTransaction();
                    ft.detach(UserFragment.this).attach(UserFragment.this).commit();
                }
            }, new Realm.Transaction.OnError() {
                @Override
                public void onError(Throwable error) {
                    error.printStackTrace();
                }
            });
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
            selectedLang = langList.get(0);
        }
    });
}

首先，我从领域获取 loginDatas，然后设置微调器，在 onItemSelected 中，我需要将所选项目的值设置为 loginDatas，然后将其设置为领域。我已经像那样设置了我的代码，但出现了这个异常

7:20.060 9708-9708/com.packagename W/System.err: java.lang.IllegalStateException: Realm access from incorrect thread. Realm objects can only be accessed on the thread they were created.
        at io.realm.BaseRealm.checkIfValid(BaseRealm.java:426)
        at io.realm.LoginDataRealmProxy.realmGet$user(LoginDataRealmProxy.java:99)
        at com.comcast.comcastmobile.entity.LoginData.getUser(LoginData.java:22)
        at com.comcast.comcastmobile.user.UserFragment.execute(UserFragment.java:189)
        at io.realm.Realm.run(Realm.java:1502)
        at io.realm.internal.async.BgPriorityRunnable.run(BgPriorityRunnable.java:34)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
        at java.lang.Thread.run(Thread.java:818)

Answer 1

有点像您无法在后台线程上访问 UI 线程视图，您也无法访问在不同线程上获得的 RealmObjects。

loginDatas 是从 UI 线程领域获得的，因此您无法在正在执行异步事务的后台线程上访问它。必须从后台线程Realm中找到loginDatas才能在后台线程修改

        realm.executeTransactionAsync(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                LoginData loginDatas = realm.where(LoginData.class).findFirst();
                loginDatas.getUser().setLanguage(selectedLang);
               // realm.insertOrUpdate(loginDatas);
            }

来自错误线程的领域访问。只能在创建它们的线程上访问 Realm 对象，同时尝试在内部 spinnerlistener 中使用

Realm access from incorrect thread. Realm objects can only be accessed on the thread they were created, while trying to use inside spinnerlistener

android

realm

android-spinner