SkipWhile 方法在 RxJava 中没有像我预期的那样工作

SkipWhile method does not work as I expected in RxJava

boolean isRetryButtonClicked = false;

.retryWhen(throwableFlowable -> throwableFlowable.skipWhile(throwable -> !isRetryButtonClicked)
    .doOnNext(throwable -> Log.w("...", "doOnNext"))
    .doOnComplete(() -> Log.w("...", "doOnComplete"))
    .doOnError(throwable -> Log.w("...", "doOnError " + throwable))
    .doOnSubscribe(subscription -> Log.w("...", "doOnSubscribe")))

如果 isRetryButtonClicked 变量为 false 那么它不会打印 doOnNext 这没关系因为我告诉它在 isRetryButtonClicked 等于 false 时跳过,但是当用户点击重试按钮时我'会将 isRetryButtonClicked 值更改为 true,然后它必须开始打印 doOnNext 但当前结果仍然没有打印任何内容。

retryWhen 需要一个信号来从该内部源执行重试。但是,isRetryButtonClicked 是一个字段,因此对它的更改不是信号。你需要的是一个Subject。例如:

PublishSubject<String> subjectToRetry = PublishSubject.create();

source.retryWhen(errors -> errors.zipWith(subjectToRetry, (e, s) -> s))
    .doOnNext(throwable -> Log.w("...", "doOnNext"))
    .doOnComplete(() -> Log.w("...", "doOnComplete"))
    .doOnError(throwable -> Log.w("...", "doOnError " + throwable))
    .doOnSubscribe(subscription -> Log.w("...", "doOnSubscribe")))

// inside the retryButton's click handler:

subjectToRetry.onNext("Doit!");