Android 自动检测版本升级(5)

接着我们要看createThread方法

/***       * 开线程下载       */       public void createThread() {           /***           * 更新UI           */           final Handler handler = new Handler() {               @Override               public void handleMessage(Message msg) {                   switch (msg.what) {                   case DOWN_OK:                       // 下载完成，点击安装                        Uri uri = Uri.fromFile(FileUtil.updateFile);                       Intent intent = new Intent(Intent.ACTION_VIEW);                       intent.setDataAndType(uri,                               "application/vnd.android.package-archive");                          pendingIntent = PendingIntent.getActivity(                               UpdateService.this, 0, intent, 0);                          notification.setLatestEventInfo(UpdateService.this,                               app_name, "下载成功，点击安装", pendingIntent);                          notificationManager.notify(notification_id, notification);                          stopSelf();                       break;                   case DOWN_ERROR:                       notification.setLatestEventInfo(UpdateService.this,                               app_name, "下载失败", pendingIntent);                       break;                      default:                       stopSelf();                       break;                   }                  }              };              final Message message = new Message();              new Thread(new Runnable() {               @Override               public void run() {                      try {                       long downloadSize = downloadUpdateFile(down_url,                               FileUtil.updateFile.toString());                       if (downloadSize > 0) {                           // 下载成功                            message.what = DOWN_OK;                           handler.sendMessage(message);                       }                      } catch (Exception e) {                       e.printStackTrace();                       message.what = DOWN_ERROR;                       handler.sendMessage(message);                   }                  }           }).start();       }  

这个方法有点小多，不过我想大家都看的明白，我在这里简单说名一下：首先我们创建一个handler用于检测最后下载ok还是not ok.

下面我们开启了线程进行下载数据。