android - 错误空指针。(io.reactivex.Scheduler)' 在空对象引用上

Question

这是我的日志猫。当我单击特定选项卡时，我的应用程序崩溃。

java.lang.NullPointerException: Attempt to invoke virtual method 'io.reactivex.Flowable io.reactivex.Flowable.observeOn(io.reactivex.Scheduler)' on a null object reference
    at com.example.haji.Fragment.RecentFragment.loadRecents(RecentFragment.java:93)
    at com.example.haji.Fragment.RecentFragment.onCreateView(RecentFragment.java:86)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:2346)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1428)

当我调用 loadRecents 时，它给了我错误。请帮忙。

private void loadRecents() {
    Disposable disposable = recentsRepository.getAllRecents().observeOn(AndroidSchedulers
        .mainThread()).subscribeOn(Schedulers.io()).subscribe(new Consumer <List <Recents>>() {
        @Override
        public void accept(List <Recents> recents) throws Exception {
            onGetAllRecentsSuccess(recents);
        }
    }, new Consumer <Throwable>() {
        @Override
        public void accept(Throwable throwable) throws Exception {
            Log.d("Error",throwable.getMessage());
        }
    });
    compositeDisposable.add(disposable);
}

标签： androidnullpointerexception

Answer 1

您的方法recentsRepository.getAllRecents()返回 null 而不是Flowable<List <Recents>>