Question

我想问一下使用Volley时如何获取状态代码。

我有以下代码：

StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    // Here I want to get status code
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                }
            }
    )

有可能吗？如果没有，为什么？

Answer 1

也许这个类而不是StringResponse：

public class NetworkResponseRequest extends Request<NetworkResponse> {
private final Response.Listener<NetworkResponse> mListener;

public NetworkResponseRequest(int method, String url, Response.Listener<NetworkResponse> listener,
                     Response.ErrorListener errorListener) {
    super(method, url, errorListener);
    mListener = listener;
}

public NetworkResponseRequest(String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
    this(Method.GET, url, listener, errorListener);
}

@Override
protected void deliverResponse(NetworkResponse response) {
    mListener.onResponse(response);
}

@Override
protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
    return Response.success(response, HttpHeaderParser.parseCacheHeaders(response));
}

public static String parseToString(NetworkResponse response) {
    String parsed;
    try {
        parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
    } catch (UnsupportedEncodingException e) {
        parsed = new String(response.data);
    }
    return parsed;
}
}

用法：

NetworkResponseRequest request = new NetworkResponseRequest(Request.Method.GET, "http://example.com/test.php",
            new Response.Listener<NetworkResponse>() {
                @Override
                public void onResponse(NetworkResponse response) {
                    // This is status code: response.statusCode
                    // This is string response: NetworkResponseRequest.parseToString(response)
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                }
            }
    );

使用我自己的实现而不是StringRequest并不好。你觉得怎么样？

Answer 2

可以采用以下格式接收网络响应

NetworkResponse response = error.networkResponse;
                if(response != null && response.data != null){
                    switch(response.statusCode){
                        case 403:
                            json = new String(response.data);
                            json = trimMessage(json, "error");
                            if(json != null) displayMessage(json);
                            break;
                    }
                }

如何获得成功响应的状态代码Volley Android

2 个答案: