鸿蒙开发再按一次退出应用

鸿蒙开发再按一次退出应用## 标题

 private long mTouchTime = 0;

    //回退拦截
    @Override
    protected void onBackPressed() {
    
    
        long mWaitTime = 2000;
        long currentTime = System.currentTimeMillis();
        if ((currentTime - mTouchTime) >= mWaitTime) {
    
    
            mTouchTime = currentTime;
            //"再按返回键退出应用！"
            new ToastDialog(this)
                    .setText("再按返回键退出应用")
                    .show();
        } else {
    
    
            //退出应用
            terminateAbility();
        }
    }