Android Volley發布請求不起作用

Question

我正在使用Google Volley Api創建一個處理我的應用程序與php腳本之間的連接的android應用程序。 由於某種原因，該應用程序未將任何數據發送到我的服務器，也許這里有人可以找出來？

我的getParams()方法被正確調用，但是當我嘗試打印它時，它返回null！ 我相信一切正常，除了數據傳遞不正確外，我相信，因為我的php腳本抱怨變量為null

public class Server_interaction
{
    String server_url = "http://xxxxxx/update_location.php"; //hidden from you ;)
String response_string;
RequestQueue queue;
Context context;

public Server_interaction(Context context)
{
     this.context = context;
     queue = Server_singleton.getInstance(context).getRequestQueue();
}


public static final String TAG = Server_interaction.class.getSimpleName();

public void post_request(final VolleyCallback callback)
{
    StringRequest stringRequest = new StringRequest(Request.Method.POST, server_url,
            new Response.Listener<String>()
            {
                @Override
                public void onResponse(String response)
                {
                    response_string = response;
                    callback.onSuccess(response_string);
                    //requestQueue.stop();
                    Log.i(TAG, "the response is: "+ response_string);

                }
            }
            , new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error){
                    response_string = "Something went wrong";
                    //error.printstacktrace()
                    //requestQueue.stop();
                    Log.i(TAG, "something went wrong. Is the server up and running?");
                }

            })
    {
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {

            String the_name = "olaf";
            String the_mail = "lalalal";
            String the_country = "Norway";
            String the_latitude = "33";
            String the_longitude = "99";


            Map<String, String> params = new HashMap<String, String>();
            params.put("name", the_name);
            params.put("email", the_mail);
            params.put("country", the_country);
            params.put("latitude", String.valueOf(the_latitude));
            params.put("longitude", String.valueOf(the_longitude));

            Log.i(TAG, "inside getparams : "+ super.getParams());
            return super.getParams();
        }
    };//stringrequest parameter end

    //add request to requestqueue
    Server_singleton.getInstance(context).addToRequestQueue(stringRequest);
    Log.i(TAG, "the response again:: "+ response_string);


}

}

Answer 1

   Map<String, String> params = new HashMap<String, String>();
    params.put("name", the_name);
    params.put("email", the_mail);
    params.put("country", the_country);
    params.put("latitude", String.valueOf(the_latitude));
    params.put("longitude", String.valueOf(the_longitude));

    Log.i(TAG, "inside getparams : "+ super.getParams());
    return super.getParams();

您要添加所有參數，然后就忽略它們並調用super.getParams。 您要么返回參數而不是super.getParams（），要么合並兩個結果。 由於您的父母只是StringRequest，因此您可以在此處返回參數（StringRequest不會自己添加任何參數）。

Answer 2

嘗試將您的代碼修改為此：

  StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                Toast.makeText(ReserveProperty.this, s, Toast.LENGTH_SHORT);



            }
        }, new Response.ErrorListener(){

            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(ReserveProperty.this, volleyError.toString(),Toast.LENGTH_LONG).show();

            }
        }){
            protected Map<String,String> getParams()
            {
                  String the_name = "olaf";
        String the_mail = "lalalal";
        String the_country = "Norway";
        String the_latitude = "33";
        String the_longitude = "99";


        Map<String, String> params = new HashMap<String, String>();
        params.put("name", the_name);
        params.put("email", the_mail);
        params.put("country", the_country);
        params.put("latitude", String.valueOf(the_latitude));
        params.put("longitude", String.valueOf(the_longitude));

                return params;


            }
        };


        Volley.newRequestQueue(this).add(stringRequest);



    }