android常用代码-再按一次退出app

public void () {
    if (isExit) {
        finish();
    } else {
        isExit = true;
        ToastUtils.showCustomBgToast(getString(R.string.press_angin_exit_text));
        new Timer().schedule(new TimerTask() {
            
            public void run() {
                isExit = false;
            }
        }, 2000);
    }
}