有人可以分享带有 Looper 的后台线程的实现吗,我可以将其传递给 subscribeOn(AndroidScheduler.from(/背景线程与循环/)).
我需要这个,因为我正在尝试实现一个 DBService 类,该类在后台运行其所有操作,同时仍然获取实时对象更新。因此,当我应用 addChangeListener 时,会引发异常:
java.lang.IllegalStateException: Your Realm is opened from a thread without a Looper. Async queries need a Handler to send results of your query
或者如果我使用 findAll() 而不是 findAllAsync():
java.lang.IllegalStateException: You can't register a listener from a non-Looper thread or IntentService thread.
数据库服务代码:
public Observable<List> getAll(Class clazz) {
return Observable.defer(() -> {
Realm realm = Realm.getDefaultInstance();
return realm.where(clazz).findAll().asObservable()
.map(o -> realm.copyFromRealm((RealmResults) o))
.doOnUnsubscribe(() -> closeRealm(realm))
.doOnTerminate(() -> closeRealm(realm));
});
}
HandlerThread 完成这项工作。
HandlerThread handlerThread = new HandlerThread("backgroundThread");
if (!handlerThread.isAlive())
handlerThread.start();
AndroidSchedulers.from(handlerThread.getLooper());
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