改造2.0b2:如何从响应中获取InputStream？

Question

我正在使用Retrofit 2.0b2.得到回复后,我尝试通过以下方式从响应中获取InputStream:

Response<JsonNode> response = call.execute();
InputStream is = response.raw().body().byteStream();

但应用程序继续投掷:

java.lang.IllegalStateException: Cannot read raw response body of a converted body.
        at retrofit.OkHttpCall$NoContentResponseBody.source(OkHttpCall.java:184)
        at com.squareup.okhttp.ResponseBody.byteStream(ResponseBody.java:43)
        at ...

尽管响应正确返回.我在这做错了什么？

Answer 1

如果你想要原始流,请告诉retrofit返回一个OkHttp ResponseBody.

import okhttp3.ResponseBody;
import retrofit2.Response;

Response<ResponseBody> response = call.execute();
try ( ResponseBody responseBody = response.body() ) {
    InputStream is = responseBody.byteStream();
    // ...
}

请记住也要更新您的界面.

由于响应主体由有限的资源支持,因此responseBody必须在使用后关闭该对象.因此,上面的代码使用try-with-resources语句.