RxJava结合Retrofit如何实现停止当前的网络请求? 400 请求报错 

mRetrofitService.getData(param);
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Observer<DataBean>() {
            @Override
            public void onCompleted() {
            }

            @Override
            public void onError(Throwable e) {
                Log.wtf("onError", e);
            }

            @Override
            public void onNext(DataBean dataBean) {
                // TODO 操作界面
            }
        });