@Override
 protected void onPreExecute() {
   // TODO Auto-generated method stub
   database = new Optdb_interfce(context);
   database.createNJTable(); // 创建数据库表(表存在时不执行)
   pd = RepairUtils.myShowDialog(context, 5);
   super.onPreExecute();
 }
 @Override
 protected void onPreExecute() {
   // TODO Auto-generated method stub
   dialog = RepairUtils.myShowDialog(context, 1);
   super.onPreExecute();
 }