1.Thread+Handler

Handler handler = new Handler(new Callback() {  

    @Override  
    public boolean handleMessage(Message msg) {  
        switch (msg.what) {  
        case 1:  
            Intent intent = new Intent(WelcomeActivity.this,  
                    GuideActivity.class);  
            startActivity(intent);  
            finish();  
            break
 
;  

        default:  
            break;  
        }  
        return false;  
    }  
});  

protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    setContentView(R.layout.activity_welcome);  

    Thread thread = new Thread() {  

        @Override  
        public
 
 void run() {  
            try {  
                sleep(1000); //休眠的時間 
            } catch (InterruptedException e) {  
                e.printStackTrace();  
            }  
            handler.sendEmptyMessage(1);  
            super.run();  
        }  

    };  
    thread.start();  
}  

2.定時器Timer

Timer timer = new Timer();  
    TimerTask task = new TimerTask() {  
        @Override  
        public void run() {  
            Intent intent = new Intent(WelcomeActivity.this,  
                    GuideActivity.class);  
            startActivity(intent);  
            finish();  
        }  
    };  
    timer.schedule(task, 1000 * 3);  

3.直接使用Handler的postDelayed方法

Handler handler = new Handler();  
        handler.postDelayed(new Runnable() {  
            @Override  
            public void run() {  
                Intent intent = new Intent(WelcomeActivity.this,  

                startActivity(intent);  
                finish();  
            }  
        }, 1000 * 3);