如何在两个 Observable 之间重用订阅者 (RxJava)
How can I reuse a Subscriber between two Observables (RxJava)
为了不重复自己,我想在两个可观察变量之间重新使用一个 Subscriber
变量。你是如何做到这一点的?我下面的当前代码不起作用,因为订阅者使用一次后,它被取消订阅并且不再起作用。如果我 new
a Subscriber
而不是重复使用变量,我的订阅就有效了。如果可能的话,我不想写两次相同的代码。
public class HomePresenter extends BasePresenter<HomeView> {
ArticleRepo articleRepo;
@Inject
public HomePresenter(ArticleRepo articleRepo) {
this.articleRepo = articleRepo;
}
@Override
public void onCreate(@Nullable PresenterBundle bundle) {
super.onCreate(bundle);
}
public void onEvent(ArticleCategoryClickedEvent event) {
Timber.v("Adapter position clicked at position: '%d'", event.getAdapterPosition());
view.launchArticleActivity(event.getArticleCategory());
}
public void onEvent(SeabeeOnlineExternalLinkClickedEvent event) {
view.launchExternalLink(event.getSeabeeOnlineExternalLink());
}
public void loadArticleImages() {
articleRepo.getArticleBuckets()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(subscriber);
}
public void refreshData() {
articleRepo.refreshAndSaveArticles()
.flatMap(new Func1<List<ArticleEntity>, Observable<List<ImageArticleCategoryEntity>>>() {
@Override
public Observable<List<ImageArticleCategoryEntity>> call(List<ArticleEntity> articleEntityList) {
return articleRepo.getArticleBuckets();
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(subscriber);
}
final Subscriber<List<ImageArticleCategoryEntity>> subscriber = new Subscriber<List<ImageArticleCategoryEntity>>() {
@Override
public void onCompleted() {
Timber.v("Loading article images complete!");
view.hideLoadingAnimation();
}
@Override
public void onError(Throwable e) {
Timber.e("Error loading article images", e);
Log.e("tag", "Error loading article images", e);
}
@Override
public void onNext(List<ImageArticleCategoryEntity> integerImageArticleCategoryEntityHashMap) {
view.loadArticleImages(integerImageArticleCategoryEntityHashMap);
}
};
}
A Subscriber
不应重复使用。它不会工作,因为它是 Subscription
,一旦取消订阅就完成了。
如果您想重复使用它,请改用 Observer
。
您可以重复使用您的订阅者,您只需要从中创建一个实际的 class。
private static class MySubscriber extends Subscriber<List<ImageArticleCategoryEntity>> {...}
Subscriber<> subscriber1 = new MySubscriber();
Subscriber<> subscriber2 = new MySubscriber();
好了。
为了不重复自己,我想在两个可观察变量之间重新使用一个 Subscriber
变量。你是如何做到这一点的?我下面的当前代码不起作用,因为订阅者使用一次后,它被取消订阅并且不再起作用。如果我 new
a Subscriber
而不是重复使用变量,我的订阅就有效了。如果可能的话,我不想写两次相同的代码。
public class HomePresenter extends BasePresenter<HomeView> {
ArticleRepo articleRepo;
@Inject
public HomePresenter(ArticleRepo articleRepo) {
this.articleRepo = articleRepo;
}
@Override
public void onCreate(@Nullable PresenterBundle bundle) {
super.onCreate(bundle);
}
public void onEvent(ArticleCategoryClickedEvent event) {
Timber.v("Adapter position clicked at position: '%d'", event.getAdapterPosition());
view.launchArticleActivity(event.getArticleCategory());
}
public void onEvent(SeabeeOnlineExternalLinkClickedEvent event) {
view.launchExternalLink(event.getSeabeeOnlineExternalLink());
}
public void loadArticleImages() {
articleRepo.getArticleBuckets()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(subscriber);
}
public void refreshData() {
articleRepo.refreshAndSaveArticles()
.flatMap(new Func1<List<ArticleEntity>, Observable<List<ImageArticleCategoryEntity>>>() {
@Override
public Observable<List<ImageArticleCategoryEntity>> call(List<ArticleEntity> articleEntityList) {
return articleRepo.getArticleBuckets();
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(subscriber);
}
final Subscriber<List<ImageArticleCategoryEntity>> subscriber = new Subscriber<List<ImageArticleCategoryEntity>>() {
@Override
public void onCompleted() {
Timber.v("Loading article images complete!");
view.hideLoadingAnimation();
}
@Override
public void onError(Throwable e) {
Timber.e("Error loading article images", e);
Log.e("tag", "Error loading article images", e);
}
@Override
public void onNext(List<ImageArticleCategoryEntity> integerImageArticleCategoryEntityHashMap) {
view.loadArticleImages(integerImageArticleCategoryEntityHashMap);
}
};
}
A Subscriber
不应重复使用。它不会工作,因为它是 Subscription
,一旦取消订阅就完成了。
如果您想重复使用它,请改用 Observer
。
您可以重复使用您的订阅者,您只需要从中创建一个实际的 class。
private static class MySubscriber extends Subscriber<List<ImageArticleCategoryEntity>> {...}
Subscriber<> subscriber1 = new MySubscriber();
Subscriber<> subscriber2 = new MySubscriber();
好了。