1     /**  2      * 下载apk  3      */  4     private static void downApk(final String url) {  5         new Thread() {  6             public void run() {  7                 HttpClient client = new DefaultHttpClient();  8                 HttpGet get = new HttpGet(url);  9                 HttpResponse response; 10                 try { 11                     response = client.execute(get); 12                     HttpEntity entity = response.getEntity(); 13                     apkSize = (int) entity.getContentLength(); 14  15                     InputStream is = entity.getContent(); 16  17                     FileOutputStream fileOutputStream = null; 18                     if (is != null) { 19                         File file = null; 20                         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { 21                             file = new File(Environment.getExternalStorageDirectory(), UPDATE_SERVERAPK); 22                             if (!file.exists()) { 23                                 file.createNewFile(); 24                             } 25                         } else { 26                             file = new File(context.getFilesDir(), "**.apk"); 27                             if (!file.exists()) { 28                                 file.createNewFile(); 29                             } 30  31                         } 32                         fileOutputStream = new FileOutputStream(file); 33                         byte[] b = new byte[1024]; 34                         int charb = -1; 35                         int count = 0; 36                         while ((charb = is.read(b)) != -1) { 37                             fileOutputStream.write(b, 0, charb); 38                             count += charb; 39                             downLoadFileSize = count; 40                             sendMsg(1); 41  42                         } 43                     } 44                     fileOutputStream.flush(); 45                     if (fileOutputStream != null) { 46                         fileOutputStream.close(); 47                     } 48                     sendMsg(2); 49                 } catch (Exception e) { 50                     // TODO Auto-generated catch block 51                     e.printStackTrace(); 52                 } 53             } 54         }.start(); 55     } 56  57     private static Handler handler = new Handler() { 58  59         @Override 60         public void handleMessage(Message msg) { 61  62             super.handleMessage(msg); 63  64             // 定义一个Handler，用于处理下载线程与UI间通讯 65             if (!Thread.currentThread().isInterrupted()) { 66                 switch (msg.what) { 67                 case 0: 68                     progress.setMax(100); 69                 case 1: 70                     int temp = ApkSize / 100; 71  72                     progress.setProgress((downLoadFileSize / temp)); 73                     break; 74                 case 2: 75                     progress.cancel(); 76                     update(); 77                     break; 78  79                 case -1: 80                     String error = msg.getData().getString("error"); 81                     Toast.makeText(context, error, 1).show(); 82                     break; 83                 } 84             } 85  86         } 87     }; 88  89     /** 90      * 下载完成，通过handler将下载对话框取消 91      */ 92     private static void sendMsg(int flag) { 93         Message msg = new Message(); 94         msg.what = flag; 95         handler.sendMessage(msg); 96     } 97  98     /** 99      * 安装应用100      */101     private static void update() {102         Intent intent = new Intent(Intent.ACTION_VIEW);103         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);104         intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);105         intent.setAction(Intent.ACTION_VIEW);106 107         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {108             intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "**.apk")), "application/vnd.android.package-archive");109 110         } else {111             File file = new File(context.getFilesDir(), "**.apk");112 113             String cmd = "chmod 777 " + file.getAbsolutePath();114             try {115                 Runtime.getRuntime().exec(cmd);116 117             } catch (Exception e) {118 119                 e.printStackTrace();120             }121 122             intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");123 124         }125         context.startActivity(intent);126     }127 }