Java代碼  

1. //添加異步操作     
2.              m_Dialog=ProgressDialog.show(m_context, "請(qǐng)等待...", "正在下載安裝文件，請(qǐng)稍后...",true);   
3.              //mRegsiterHandler.sleep(100);   
4.              new Thread(new Runnable(){   
5.   
6.                     @Override  
7.                     public void run() {   
8.                    //加載數(shù)據(jù)   
9.                          result=0;   
10.                           try{   
11.                               //下載文件   
12.                               String url="http://00.00.00.00:80/nationaltest.html";   
13.                                 HttpClient client = new DefaultHttpClient();        
14.                               HttpGet get = new HttpGet(url);        
15.                               HttpResponse response;        
16.                                  
17.                               response = client.execute(get);        
18.                               HttpEntity entity = response.getEntity();        
19.                               long length = entity.getContentLength();        
20.                               InputStream is = entity.getContent();        
21.                               FileOutputStream fileOutputStream = null;        
22.                               if (is != null) {        
23.                                   File file = new File(Environment.getExternalStorageDirectory(), "nationaltest.apk");        
24.                                   fileOutputStream = new FileOutputStream(file);        
25.                                   byte[] buf = new byte[1024];        
26.                                   int ch = -1;        
27.                                   while ((ch = is.read(buf)) != -1) {        
28.                                       fileOutputStream.write(buf, 0, ch);        
29.                                   }        
30.                              }        
31.                              fileOutputStream.flush();        
32.                              if (fileOutputStream != null) {        
33.                                  fileOutputStream.close();        
34.                              }     
35.                              result=2;   
36.                           }   
37.                          catch(Exception ex){   
38.                              result=-1;    
39.                          }              
40.                            
41.                     //更新界面   
42.                          // Update the progress bar    
43.                          mHandler.post(new Runnable() {        
44.                              public void run() {                             
45.                                  if(result==2)   
46.                                       install();   
47.                                        else  
48.                                            Toast.makeText(m_context, "下載文件失敗,請(qǐng)檢查網(wǎng)絡(luò)連接", Toast.LENGTH_SHORT).show();       
49.                                  }                     
50.                              });   
51.                            
52.                        
53.                      m_Dialog.dismiss();   
54.                     }}).start();   
55.                 
56.               }   

//添加異步操作  
             m_Dialog=ProgressDialog.show(m_context, "請(qǐng)等待...", "正在下載安裝文件，請(qǐng)稍后...",true);
             //mRegsiterHandler.sleep(100);
             new Thread(new Runnable(){

                    @Override
                    public void run() {
                   //加載數(shù)據(jù)
                         result=0;
                          try{
                              //下載文件
                              String url="http://00.00.00.00:80/nationaltest.html";
                                HttpClient client = new DefaultHttpClient();     
                              HttpGet get = new HttpGet(url);     
                              HttpResponse response;     
                              
                              response = client.execute(get);     
                              HttpEntity entity = response.getEntity();     
                              long length = entity.getContentLength();     
                              InputStream is = entity.getContent();     
                              FileOutputStream fileOutputStream = null;     
                              if (is != null) {     
                                  File file = new File(Environment.getExternalStorageDirectory(), "nationaltest.apk");     
                                  fileOutputStream = new FileOutputStream(file);     
                                  byte[] buf = new byte[1024];     
                                  int ch = -1;     
                                  while ((ch = is.read(buf)) != -1) {     
                                      fileOutputStream.write(buf, 0, ch);     
                                  }     
                             }     
                             fileOutputStream.flush();     
                             if (fileOutputStream != null) {     
                                 fileOutputStream.close();     
                             }  
                             result=2;
                          }
                         catch(Exception ex){
                             result=-1; 
                         }           
                        
                    //更新界面
                         // Update the progress bar 
                         mHandler.post(new Runnable() {     
                             public void run() {                          
                                 if(result==2)
                                      install();
                                       else
                                           Toast.makeText(m_context, "下載文件失敗,請(qǐng)檢查網(wǎng)絡(luò)連接", Toast.LENGTH_SHORT).show();    
                                 }                  
                             });
                        
                    
                     m_Dialog.dismiss();
                    }}).start();
             
              }