android 软件初始加载等待几秒自动进入.

 

new Thread()
{public void run()
{try {sleep(3000);     //等待三秒,自动进入软件主窗口            
 Intent intent = new Intent();          
intent.setClass(Main.this, Grade.class);            
 startActivity(intent);        }          
catch (Exception e) {          e.printStackTrace();          }        
  //progressDialog.dismiss();         
 }       
 }.start();