Android(安卓)易忘部分

1. 添加 service

在 activity 后面, application 添加, service 的类名标示在属性 name 中, 路径为从 src 下的包名到类名, 若只有一个包, 可以直接用 (.类名) 标示

2. java 获取本机地址

　　先是反例

//get localhost ip address        InetAddress addr;        try {            addr = InetAddress.getLocalHost();            String ip = addr.getHostAddress().toString();            System.out.println("Listening on "+ip+":"+listener.getPort());        } catch (UnknownHostException e1) {            // TODO Auto-generated catch block            e1.printStackTrace();        }

　　再是正解

Enumeration<NetworkInterface> ip;        try {            ip = NetworkInterface.getNetworkInterfaces();            while(ip.hasMoreElements()) {                NetworkInterface iface = ip.nextElement();                 if (iface.isLoopback() || !iface.isUp())                        continue;                                 Enumeration<InetAddress> addresses = iface.getInetAddresses();                    while(addresses.hasMoreElements()) {                        InetAddress addr = addresses.nextElement();                        String desiredip = addr.getHostAddress();                        System.out.println(iface.getDisplayName() + " " + desiredip);                    }            }        } catch (SocketException e1) {            // TODO Auto-generated catch block            e1.printStackTrace();        }

直接查询 IPconfig 就好了, 动态的话, 是有些 tricky, 上面的正解也并不是很有效

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