Question

我的Android应用程序中的请求出现超时错误。我已经设置了重试策略，但它没有解决问题。在我的模拟器上测试时它没有错误，但是当使用真实设备进行测试时会出现超时错误。

public void makeRequest(final String user, final String cred)
    {
        String url = "http://10.0.2.2:8888/map/api/login";

        StringRequest postRequest = new StringRequest(Request.Method.POST, url,
                new Response.Listener<String>()
                {
                    @Override
                    public void onResponse(String response)
                    {
                        try
                        {
                            JSONObject jsonResponse = new JSONObject(response);
                            String status = jsonResponse.getString("status");
                            String token = jsonResponse.getString("token");


                            if(status.equalsIgnoreCase("error"))
                            {
                                Snackbar.make(findViewById(R.id.myCoordinatorLayout), jsonResponse.getString("message"), Snackbar.LENGTH_LONG).show();
                            }
                            else if (status.equalsIgnoreCase("success"))
                            {
                                System.out.println(jsonResponse);
                                Intent loader = new Intent(home.this,webViewActivity.class);
                                loader.putExtra(EXTRA_MESSAGE,token);
                                startActivity(loader);
                            }

                        }
                        catch (JSONException e)
                        {
                            e.printStackTrace();
                        }
                    }
                },
                new Response.ErrorListener()
                {
                    @Override
                    public void onErrorResponse(VolleyError error)
                    {
                        error.printStackTrace();
                    }
                }
        ){
            @Override
            protected Map<String, String> getParams()
            {
                Map<String, String> params = new HashMap<>();
                params.put("portal[username]", user);
                params.put("portal[password]", cred);
                params.put("portal[From]","web");
                return params;
            }
        };
        postRequest.setRetryPolicy(new DefaultRetryPolicy(
                7000,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
        Volley.newRequestQueue(getApplicationContext()).add(postRequest);


    }

我得到的错误低于

08-18 12:42:46.341 16112-16112/com.mobile.map.map_mobile W/System.err: com.android.volley.TimeoutError
08-18 12:42:46.341 16112-16112/com.mobile.map.map_mobile W/System.err:     at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:141)
08-18 12:42:46.341 16112-16112/com.mobile.map.map_mobile W/System.err:     at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:112)

Answer 1

您可以检查不同的设备和不同的网络。如果它不起作用，请检查邮递员的响应时间是否超过2500毫秒（凌空默认超时），在DefaultRetryPolicy.class中增加凌空的默认超时

Answer 2

我假设你的Key值对是Body。

        JSONObject params = new JSONObject();

            try {
                params.put("portal[username]", user);
                params.put("portal[password]", cred);
                params.put("portal[From]","web");
            } catch (JSONException e) {
               // Do something
            }

        Response.Listener<JSONObject> jsonObjectListener = new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    // Response here
                }
            };

        Response.ErrorListener errorListener = new  Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // Error here
                }
            };

       String url = "http://10.0.2.2:8888/map/api/login";

       JsonObjectRequest jsonRequest = new JsonObjectRequest(Request.Method.POST, url, params,
                    jsonObjectListener, errorListener);

       Volley.newRequestQueue(getApplicationContext()).add(jsonRequest);

Android设备在发出http请求时发出超时错误

2 个答案: