Question

我尝试向Web服务发出http登录请求。我设置了JSONobject请求，但是当我尝试调试代码时，响应JSON对象似乎为null。（我应该得到一个JSON对象的响应）。有什么想法吗？

 public UserData initLogin(Creds cr) {

    StringBuilder finalURL = new StringBuilder("https://");
    finalURL.append(credentials.getUrl());
    finalURL.append("/s1services");

    Response.Listener<JSONObject> r1 = new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            res = response.toString();
            us = gson.fromJson(String.valueOf(response), UserData.class);

        }
    };
    JsonObjectRequest req = new JsonObjectRequest(Request.Method.POST, finalURL.toString(), cr.serObj(), r1, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });






    return us;
}

我应该将此请求发送到请求队列还是什么？我应该提到凭证类有一个URL属性和一个getUrl（）方法。

Answer 1

我会按照Android文档中的示例进行操作：

StringBuilder finalURL = new StringBuilder("https://");
finalURL.append(credentials.getUrl());
finalURL.append("/s1services");
String url = finalURL.toString();

JsonObjectRequest jsonObjectRequest = new JsonObjectRequest
    (Request.Method.GET, url, null, new Response.Listener<JSONObject>() {

    @Override
    public void onResponse(JSONObject response) {
        //handle your json response here
        us = gson.fromJson(String.valueOf(response), UserData.class);
    }
  }, new Response.ErrorListener() {

  @Override
  public void onErrorResponse(VolleyError error) {
      // TODO: Handle error

  }
});

// Access the RequestQueue through your singleton class.
MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest);

请参阅：https://developer.android.com/training/volley/request

我怎样才能发出HTTP POST请求并使用Json Response我应该进入android

1 个答案: