排气在模拟器上运行，但在设备上失败

Question

我有一个LG G3，当我运行我的应用程序时，排气失败。我所做的只是发送一个post请求到我的本地服务器，它在模拟器上完美工作，但在设备上失败。我得到的错误是超时错误。这里是代码：

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     final Button button = (Button) findViewById(R.id.button); 
     final TextView textview = (TextView) findViewById((R.id.test)); 
     button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       sendRequest("example", "0", "0", "0", "0", "0", "0"); 

      } 
     }); 
    } 


    public void sendRequest(final String location, final String mood, final String gender, final String age, 
          final String day, final String month, final String year) { 

     RequestQueue requestQueue = Volley.newRequestQueue(this); 
     String url = "http://10.0.2.2:8000/polls/add/"; 

     StringRequest stringRequest = new StringRequest(Request.Method.POST, url, 
       new Response.Listener<String>() { 
        @Override 
        public void onResponse(String response) { 
         Toast.makeText(MainActivity.this, "works", Toast.LENGTH_SHORT).show(); 
        } 
       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       Toast.makeText(MainActivity.this, "Error is: " + error.toString(), 
         Toast.LENGTH_LONG).show(); 
       Log.e("VOLLEY", error.toString()); 
      } 
     }) { 
      @Override 
      protected Map<String, String> getParams() { 
       Map<String, String> parameters = new HashMap<>(); 
       parameters.put("age", age); 
       parameters.put("location", location); 
       parameters.put("mood", mood); 
       parameters.put("gender", gender); 
       parameters.put("day", day); 
       parameters.put("month", month); 
       parameters.put("year", year); 
       return parameters; 
      } 

      @Override 
      public Map<String, String> getHeaders() throws AuthFailureError { 
       Map<String, String> params = new HashMap<>(); 
       params.put("Content-Type", "application/x-www-form-urlencoded"); 
       return params; 
      } 
     }; 
     requestQueue.add(stringRequest); 
    } 
} 

任何帮助将非常感激。谢谢！

Answer 1

如果你想，你应该用你的网内IP的本地服务器工作....例如192.168.1.105，而不是本地IP地址（10.0.2.2 - 127.0.0.1 - 等）

所以...只是使用ipconfig/all，然后找到你计算机的IP地址：

String url = "http://192.168.1.105:8000/polls/add/";