Question

实际上，我已经创建了RxSearch类型的配置。我在其中附加了一个Edittext textChangeListener和PublishSubject。使用事件将字符发送到Observable，该字符将用作改良API调用的输入。

问题

我面临的唯一问题是，有时我会从可观察到的onError（）回调中的API“错误的流结束”中得到错误。一旦收到错误，Observable将停止工作。 Observable关闭，无法从PublishSubject的onNext（）中获取字符。

查看 RxSearchObservable

class RxSearchObservable {
companion object {
    fun fromView(editText: EditText): Observable<String> {
        val subject = PublishSubject.create<String>()
        editText.addTextChangedListener(object : TextWatcher {
            override fun afterTextChanged(s: Editable?) {
                //subject.onComplete()
            }

            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
                //subject.onNext(s.toString())
            }

            override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
                if (s.isNotEmpty()) subject.onNext(s.toString())
            }
        })
        return subject
    }
}
}

我如何在侧面SwitchMap中订阅和进行Retrofit API调用。

 RxSearchObservable.fromView(edtToolSearch)
                    .debounce(700, TimeUnit.MILLISECONDS)
                    .distinctUntilChanged()
                    .retryWhen { t -> t.delay(3, TimeUnit.SECONDS) }
                    .switchMap { searchTerm ->
                        runOnUiThread { progressBar.visibility = View.VISIBLE }
                        apiManager.getSearchUnits(searchTerm)
                    }
                    .onErrorResumeNext(Observable.empty())
                    .subscribe({ response ->
                        Log.i("Called subscribe", ":::::::::::+++++++++++++++ GONE")
                        progressBar.visibility = View.GONE
                        if (response.isSuccessful) {
                            val units = response.body()
                            val searchedDatasets = units?.dataset
                            if (searchedDatasets?.size!! > 0) {
                                val searchAdapter = SearchAdapter(this@MapActivity, searchedDatasets, false)
                                listSearch.visibility = View.VISIBLE
                                listSearch.adapter = searchAdapter
                            } else {
                                toast("No items found !!!")
                            }
                        } else {
                            apiError = ErrorUtils.parseError(response)
                            toast(apiError.msg)
                        }
                    }, { t: Throwable? ->
                        progressBar.visibility = View.GONE
                        toast(t?.message.toString())
                    }))

任何想法，帮助，建议将不胜感激。预先感谢。

Answer 1

错误终止的流。您可以retry()进行订阅，但这仅应有条件地完成。也许有超时，也许只有几次，也许只有某些错误。

根据您的情况，您应该考虑处理switchMap中的API调用错误。像这样，错误不会到达主流。

.switchMap { searchTerm ->
    runOnUiThread { progressBar.visibility = View.VISIBLE }
    apiManager.getSearchUnits(searchTerm)
          .onErrorResumeNext(Observable.empty())
}

RxJava：即使在onError（）中出现错误后，如何仍保持Observable存活或重新订阅相同的Observable

1 个答案: