Android 使用OKHttp3请求接口401，返回Authorization Required错误解决

公司项目需要接入香港天文台的天气xml，API是http://xml.weather.gov.hk/V2/

需要账号密码，机场那边提供过来之后，发现app内请求会报401，Authorization Required错误。

话不多说，直接上代码：

OkHttpClient.Builder client = new OkHttpClient.Builder();
client.authenticator(new Authenticator() {
    @Override
    public Request authenticate(Route route, okhttp3.Response response) throws IOException {
        if (responseCount(response) >= 3) {
            return null; 
        }
        String credential = Credentials.basic("userName", "passWord");
        return response.request().newBuilder().header("Authorization", credential).build();
    }
});

Request request = new Request.Builder().get().url(url).build();

client.build().newCall(request).enqueue(new okhttp3.Callback() {
            @Override
            public void onFailure(okhttp3.Call call, IOException e) {

            }

            @Override
            public void onResponse(okhttp3.Call call, okhttp3.Response response) {
     		if (response.isSuccessful())
//                  LogUtils.error(TAG, "Successful");
                
            }
        });

private int responseCount(okhttp3.Response response) {
    int result = 1;
    while ((response = response.priorResponse()) != null) {
        result++;
    }
    return result;
}

参考资料：

https://square.github.io/okhttp/2.x/okhttp/com/squareup/okhttp/Authenticator.html