Question

Realm 3.5.0

在我的Application类中，我登录到Realm Object Server，成功后我设置了Realm set default configruation。

public class MyApp extends MultiDexApplication {

...

private void setRealmDefaultConfiguration(SyncUser syncUser, String realmURL) {
    SyncConfiguration config = new SyncConfiguration.Builder(syncUser, realmURL)
            .waitForInitialRemoteData()
            .build();
    Realm.setDefaultConfiguration(config);
}

}

行。

在我的片段中，我尝试获取Realm实例。

public class MyFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.my_fragment, container, false);
    realm = Realm.getDefaultInstance(); // HERE THROW ERROR
    return rootView;
}

}

但我得到错误：

E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IllegalStateException: downloadAllServerChanges() cannot be called from the main thread.
    at io.realm.SyncSession.checkIfNotOnMainThread(SyncSession.java:357)
    at io.realm.SyncSession.downloadAllServerChanges(SyncSession.java:322)
    at io.realm.internal.SyncObjectServerFacade.downloadRemoteChanges(SyncObjectServerFacade.java:176)
    at io.realm.RealmCache.doCreateRealmOrGetFromCache(RealmCache.java:305)
    at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:284)
    at io.realm.Realm.getDefaultInstance(Realm.java:281)
    at com.myproject.fragment.MyFragment.onCreateView(OrganizationsFragment.java:147)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
    at android.os.Handler.handleCallback(Handler.java:730)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)

Answer 1

.waitForInitialRemoteData()使用网络，因此您不允许使用具有该设置的任何配置在UI线程上调用Realm.getInstance()。这将是您的应用程序ANR。这也应记录在waitForInitialRemoteData的Javadoc中。

相反，您可以使用Realm.getInstanceAsync()，它会在后台线程上加载数据，并在Realm实例准备好后返回它。

Androd，Realm：Realm.getDefaultInstance（），IllegalStateException：无法从主线程

1 个答案: