Android中获取装置的IP

Android中获取设备的IP
在wifi环境下，可以通过WifiInfo来获取设备的ip

	public String getIpAddress() {		WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);		WifiInfo wifiInfo = wifiManager.getConnectionInfo();		int ipAddress = wifiInfo.getIpAddress();		int[] ipAddr = new int[4];		ipAddr[0] = ipAddress & 0xFF;		ipAddr[1] = (ipAddress >> 8) & 0xFF;		ipAddr[2] = (ipAddress >> 16) & 0xFF;		ipAddr[3] = (ipAddress >> 24) & 0xFF;		return new StringBuilder().append(ipAddr[0]).append(".").append(ipAddr[1]).append(".").append(ipAddr[2])				.append(".").append(ipAddr[3]).append(".").toString();	}

执行上面的代码需要

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

当然也可通过jdk总的NetworkInterface来获取的，就是遍历所有的网络接口，获取到非loopback ip

	public String getLocalIpAddress() {		try {			for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {				NetworkInterface intf = en.nextElement();				for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {					InetAddress inetAddress = enumIpAddr.nextElement();					if (!inetAddress.isLoopbackAddress()) {						return inetAddress.getHostAddress().toString();					}				}			}		} catch (SocketException ex) {			Log.e("", ex.toString());		}		return null;	}