处理Retrofit 2 RX中的错误 [英] Handle errors in Retrofit 2 RX

问题描述

我的请求应获取POJO的JSON或JSON描述的错误(可以是无效的请求字段，服务器问题等).

My request should get either JSON for POJO or JSON described error(can be invalid request fields, server problems and so on).

但是在订户中进行的改装只给我Throwable.如何找出网络错误，什么是http代码，并获取带有错误的JSON?

But retrofit in subscriber gives me only Throwable. How can I find out is that a network error, what is http code, and get JSON with error?

private class ProjectListSubscriber extends Subscriber<ProjectListResponse> {

    @Override
    public void onCompleted() {
    }

    @Override
    public void onError(Throwable e) {
        //is that a network? http code? convert json to error POJO?
    }

    @Override
    public void onNext(ProjectListResponse projectListResponse) {
        updateProjectList(projectListResponse.getProjectList());
    }
}

推荐答案

由于您使用的是RxJava，因此在出现网络错误的情况下将调用onError，并且与端点相关的错误是Response的一部分. 如果发生错误，请检查throwable是否为

Since you are using RxJava, onError is called in case of network errors and endpoints related error are part of the Response. In case of error, check if the throwable is an instance of HttpException

public void onError(Throwable e) {
    if (e instanceof HttpException) {

如果检查为真，则您的请求中有错误.将throwable强制转换为HttpException，并且访问权限是成员.例如.

if the check is true, the you have an error in your request. Cast the throwable to HttpException, and access is members. E.g.

((HttpException) e).response().errorBody()

如果检查为false，则说明与网络相关的错误.

if the check is false then you have a network related error.

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