Android Volley-BasicNetwork.PerformRequest：意外响应代码400

Question

问题陈述：

我正在尝试访问一个REST API，它将使用Volley返回一个用于各种HTTP状态代码(400、403、200等）的JSON对象。

protected void getLogin() {   
    final String mURL = "https://somesite.com/api/login";

    EditText username = (EditText) findViewById(R.id.username);
    EditText password = (EditText) findViewById(R.id.password);

    // Post params to be sent to the server
    HashMap<String, String> params = new HashMap<String, String>();
    params.put("username", username.getText().toString());
    params.put("password", password.getText().toString());

    JsonObjectRequest req = new JsonObjectRequest(mURL, new JSONObject(
            params), new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {

            try {
                JSONObject obj = response
                        .getJSONObject("some_json_obj");

                Log.w("myApp",
                        "status code..." + obj.getString("name"));

                // VolleyLog.v("Response:%n %s", response.toString(4));

            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.w("error in response", "Error: " + error.getMessage());
        }
    });

    // add the request object to the queue to be executed
    AppController.getInstance().addToRequestQueue(req);
}

Answer 1

在不更改volley源代码的情况下实现此目的的一种方法是检查volleyerr中的响应数据，并自己解析它。

从F605DA3Commit开始，Volley会引发包含原始网络响应的ServerError异常。

因此您可以在错误侦听器中执行类似的操作：

/* import com.android.volley.toolbox.HttpHeaderParser; */
public void onErrorResponse(VolleyError error) {

    // As of f605da3 the following should work
    NetworkResponse response = error.networkResponse;
    if (error instanceof ServerError && response != null) {
        try {
            String res = new String(response.data,
                       HttpHeaderParser.parseCharset(response.headers, "utf-8"));
            // Now you can use any deserializer to make sense of data
            JSONObject obj = new JSONObject(res);
        } catch (UnsupportedEncodingException e1) {
            // Couldn't properly decode data to string
            e1.printStackTrace();
        } catch (JSONException e2) {
            // returned data is not JSONObject?
            e2.printStackTrace();
        }
    }
}

我希望他们实现源文件中提到TODO。