Rx 2 Android api调用的Single或Observable更好的是什么? [英] Rx 2 Android what is better Single or Observable for api calls?

问题描述

当我们使用Retrofit2通过Rx进行API剩余调用时，最好的使用方法是Single还是Observable?

when we use retrofit2 for doing API rest calls with Rx, What is the best approach to use, Single or Observable?

public interface ApiService{

Single<Data> getDataFromServer();

Observable<Data> getDataFromServer();
}

推荐答案

我建议使用 Single ，因为它可以更准确地表示数据流:您向服务器发出请求，然后您会发出一个数据 OR 或一个错误:

I'd suggest using a Single as it is more accurate representation of the data flow: you make a request to the server and the you get either one emission of data OR an error:

Single:     onSubscribe (onSuccess | onError)?

对于 Observable ，理论上您可以得到数个发射数据 AND 一个错误

For an Observable you could theoretically get several emissions of data AND an error

Observable: onSubscribe onNext? (onCompleted | onError)?

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但是，如果您使用的是rx-java2 ，我建议使用 也许 而不是 Single .两者之间的区别在于，当您从服务器获取响应但它不包含任何正文时，也许也会处理这种情况.

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However, if you are using rx-java2, I'd suggest using a Maybe instead of Single. The difference between those two is that Maybe handles also the case when you get the response from server but it contains no body.

Maybe:      onSubscribe (onSuccess | onCompleted | onError)?

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