Question

我创建了一个每20秒运行一次的Observable。我需要在我使用onPreExecute方法的AsyncTask中每轮之前显示进度栏（UI组件）。如何在RXJava2中做到这一点？

 disposables = Observable
 .interval(0, 20, TimeUnit.SECONDS)
  .doOnNext(n -> MainCulc_actions())
  .subscribeOn(Schedulers.io())   // Run on a background thread
  .observeOn(AndroidSchedulers.mainThread())     // Be notified on the main thread
   .subscribeWith(new DisposableObserver<Long>() {

      @Override
      public void onError(Throwable e) {
      }
      @Override
      public void onComplete() {
      }
      @Override
      public void onNext(Long res) {
        UpdateTheUI();
        avi.smoothToHide();
      }
    });

Answer 1

您可以尝试doOnSubscribe。例如

disposables = Observable
.interval(0, 20, TimeUnit.SECONDS)
.doOnNext(n -> MainCulc_actions())
.subscribeOn(Schedulers.io())   // Run on a background thread
.observeOn(AndroidSchedulers.mainThread())     // Be notified on the main thread
.doOnSubscribe(s -> avi.showUI)
.subscribeWith(new DisposableObserver<Long>() {

  @Override
  public void onError(Throwable e) {
  }
  @Override
  public void onComplete() {
  }
  @Override
  public void onNext(Long res) {
    UpdateTheUI();
    avi.smoothToHide();
  }
});

RXJava2中的PreExecution相当于什么？

1 个答案: