Android Volley - StringRequest 无响应

Question

我在使用 Android Volley 时无法获得 JSON 响应。没有错误也没有成功响应，请参阅 (Log.d("logr=",_response);)。我使用 StringRequest 从 Google Map API Android V2 中获取 JSON 文本。这是代码

private String urla = "https://maps.googleapis.com/maps/api/place/search/json?location=";
private String urlb = "&types=hotel&radius=500&sensor=false&key=YOUR_KEY";


   @Override //::LocationListener (Interface)
    public void onLocationChanged(Location location) {
        //Log.d(TAG, "Firing onLocationChanged..............................................");
        mCurrentLocation = location;
        CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude()), 13);
        googleMap.animateCamera(cameraUpdate);

        double x = location.getLatitude();
        double y = location.getLongitude();

        String request = urla+x+","+y+urlb;
        Log.d("log1=",request);
        StringRequest stringRequest = new StringRequest(Request.Method.GET, request,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String _response) {

                        Log.d("logr=",_response);

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

                // Error handling
                Log.d("log2=", error.toString());
                Log.e("log3=", error.toString());
            }
        });


        Toast.makeText(activity, "Update location user ==>" + mCurrentLocation.getLatitude() + "," + mCurrentLocation.getLongitude(), Toast.LENGTH_SHORT).show();
        Log.d(TAG, "Current Location :" + mCurrentLocation.getLatitude() + "," + mCurrentLocation.getLongitude());
    }

这个问题有什么解决办法吗？

Answer 1

你实际上在哪里执行请求？你必须 add() 它到 Volley 的 RequestQueue，否则请求根本不会被发送。

// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);

String url = urla + x + "," + y + urlb;

StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String _response) {

                Log.d("logr=",_response);

            }
        }, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {

        // Error handling
        Log.d("log2=", error.toString());
        Log.e("log3=", error.toString());
    }
});
//excecute your request
queue.add(stringRequest);

在此处查看更多信息：Learn volley

Answer 2

试试这个：

requestQueue = Volley.newRequestQueue(getActivity().getApplicationContext());
final StringRequest stringRequest = new StringRequest(Request.Method.POST, urlString, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
            strr = response;
            pDialog.hide();
        }
    }, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
            pDialog.hide();
            Log.e("Volley", "ERROR");
        }
   });
requestQueue.add(stringRequest);

Android Volley - StringRequest 无响应

Android Volley - No Response from StringRequest

connection

android

json

android-volley