Android handler

protected void onResume() //在onCreate之后、以及每次横竖切屏、从其他界面返回的时候，都会被调用
    {
        super.onResume();
        new Handler().postDelayed(new Runnable()
        {
            @Override
            public void run()
            {
                //Finish the splash activity so it can‘t be returned to.
                SplashActivity.this.finish();
                Intent mainIntent = new Intent(SplashActivity.this, Accueil.class);
                SplashActivity.this.startActivity(mainIntent);
            }
        }, 4000);
    }