我能够使用Postman和这些参数调用HTTP端点：
{
"name":"Val",
"subject":"Test"
}
但是我无法通过Android对Volley做同样的事情：这里尝试使用JSONRequest：
HashMap params2 = new HashMap();
params.put("name", "Val");
params.put("subject", "Test Subject");
JsonObjectRequest jsObjRequest = new JsonObjectRequest
(Request.Method.POST, Constants.CLOUD_URL, new JSONObject(params2), new Response.Listener() {
@Override
public void onResponse(JSONObject response) {
mView.showMessage("Response: " + response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
mView.showMessage(error.getMessage());
}
});
// Access the RequestQueue through your singleton class.
VolleySingleton.getInstance(mContext).addToRequestQueue(jsObjRequest);
这里是尝试StringRequest
private void postMessage(Context context, final String name, final String subject ){
RequestQueue queue = Volley.newRequestQueue(context);
StringRequest sr = new StringRequest(Request.Method.POST, Constants.CLOUD_URL, new Response.Listener() {
@Override
public void onResponse(String response) {
mView.showMessage(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
protected Map getParams(){
Map params = new HashMap();
params.put("name", name);
params.put("subject", subject);
return params;
}
@Override
public Map getHeaders() throws AuthFailureError {
Map params = new HashMap();
params.put("Content-Type","application/x-www-form-urlencoded");
return params;
}
};
queue.add(sr);
}
当我使用JSONRequest时,调用POST但没有传递参数,当我使用StringRequest时,我得到下面的错误？如何将JSON数据传递给Volley调用？
E/Volley: [13053] BasicNetwork.performRequest: Unexpected response code 400 for
这是处理请求的服务器代码
public static async Task Run(HttpRequestMessage req, TraceWriter log)
{
var helloRequest = await req.Content.ReadAsAsync();
var name = helloRequest?.Name ?? "world";
var responseMessage = $"Hello {personToGreet}!";
log.Info($"Message: {responseMessage}");
return req.CreateResponse(HttpStatusCode.OK, $"All went well.");
}
public class HelloRequest
{
public string Name { get; set; }
public string Subject { get; set; }
}