1. package com.example.test1;
   
2. 
   
3. import java.io.BufferedReader;
   
4. import java.io.IOException;
   
5. import java.io.InputStreamReader;
   
6. import java.io.PrintWriter;
   
7. import java.net.HttpURLConnection;
   
8. import java.net.MalformedURLException;
   
9. import java.net.URL;
   
10. 
    
11. import com.example.test1.R;
    
12. 
    
13. import android.os.Bundle;
    
14. import android.annotation.SuppressLint;
    
15. import android.app.Activity;
    
16. import android.view.View;
    
17. import android.view.View.OnClickListener;
    
18. import android.widget.Button;
    
19. import android.widget.Toast;
    
20. 
    
21. public class MainActivity  extends Activity{
    
22. String urlString = "http://127.0.0.1:8888/test/hello.php";
    
23. private URL url;
    
24. String line;
    
25. String result = "";
    
26. private HttpURLConnection httpUrlconnection;
    
27. 
    
28. 
    
29. @Override
    
30. protected void onCreate(Bundle savedInstanceState){
    
31. super.onCreate(savedInstanceState);
    
32. setContentView(R.layout.activity_main);
    
33. OnClickListener lis=new OnClickListener(){
    
34.          @SuppressLint("ShowToast")
    
35. public void onClick(View v)
    
36.          {
    
37.              try {
    
38. url = new URL(urlString);
    
39. httpUrlconnection = (HttpURLConnection) url.openConnection();
    
40. httpUrlconnection.setRequestMethod("POST");
    
41. httpUrlconnection.setDoOutput(true);
    
42. httpUrlconnection.setDoInput(true);
    
43. 
    
44. httpUrlconnection.connect();
    
45. 
    
46. PrintWriter out = new PrintWriter(httpUrlconnection.getOutputStream());
    
47. out.print(R.id.EdiUser);
    
48. out.flush();
    
49. 
    
50. BufferedReader in = new BufferedReader(new InputStreamReader(httpUrlconnection.getInputStream()));
    
51. while((line = in.readLine()) != null)
    
52. {
    
53. result += "\n"+line;
    
54. }
    
55. 
    
56. Toast.makeText(getApplicationContext(), "hello!", Toast.LENGTH_LONG);
    
57. 
    
58. 
    
59. } catch (MalformedURLException e) {
    
60. e.printStackTrace();
    
61. } catch (IOException e) {
    
62. e.printStackTrace();
    
63. }
    
64.             
    
65.          }
    
66.         };
    
67.         Button b=(Button)findViewById(R.id.btnSure);
    
68.         b.setOnClickListener(lis);
    
69. }
    
70. 
    
71. 
    
72. 
    
73. 
    
74. 
    
75. }

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在android里面，你的127.0.0.1，指的是模拟器，而不是服务器地址。你使用ipconfig，查找到你自己的Ip,换成本地ip

或者使用 10.xx。xx。xx什么的，具体忘了