在Android平台上捕获Back键的事件,super.onBackPressed()是执行系统的默认动作,就是退出当前activity,我们要做的就是重写onBackPressed()函数, public void onBackPressed(){ Toast.makeText(this, "你点击了返回键", Toast.LENGTH_LONG).show(); } 在Activity.class里实现 public void onBackPressed() { new Alert…
@Override public void onBackPressed() { new AlertDialog.Builder(this).setTitle("确认退出吗?") .setIcon(android.R.drawable.ic_dialog_info) .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogI…
实现方法分为两大类:窗体事件和控件事件,下面就一一展示: 一.FormClosing事件(又分以下几种方法) a. Private Sub frmPractise_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing If MessageBox.Show("确定退出吗?", "退出确认", Mes…
.巧用bash的{}扩展备份目录: cp file.txt{,.bak} .利用at执行一次性命令: echo "ls -l" | at midnight #Execute a command at a given time .kill - 或者 kill -HUP 一般用来重新读取配置文件:(一般程序自己实现的) HUP 其实就是给个信号,你的程序可以根据这个信号做一些事情,比如reload进程,或者是rotota日志.例如 squid.Nginx.xinetd. kill就是发送一…
跟着网上的视频学的,还有个别地方写的不够好,主要学习dao模式,这里其中的BaseUtil类不错 DVD.java package com.dvd.entiy; public class DVD { private int id; private String dname; private int dcount; private int status; public DVD() { } public DVD(String dname, int dcount, int status) { supe…
Login with API calls Related Topics Understanding sessions FBSession Error handling FBError FBLoginCustomUISample app In this section: Overview Prerequisites Opening a session Handling session state changes Handling app cold starts Testing your login…