Android 判断网络是否可用 & 获取IP地址 & 获取以太网口MAC地址移动开发qq36270361的博客-

判断网络是否可用：

注意！是判断网络是否可用，但网络可用不代表一定能上外网的！

 public static boolean isNetworkAvailable(Context context) {          ConnectivityManager manager = (ConnectivityManager) context                 .getApplicationContext().getSystemService(                         Context.CONNECTIVITY_SERVICE); if (manager == null) { return false; }         NetworkInfo networkInfo = manager.getActiveNetworkInfo(); return networkInfo != null && networkInfo.isConnected(); } 

在AndroidManifest.xml文件下，添加下面权限：

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

如果想判断是否能上外网可以ping一下外网的ip地址：

 public static boolean pingIPAddress(String ipAddress) { try { //-c 1是指ping的次数为1次，-w 3是指超时时间为3s             Process process = Runtime.getRuntime() .exec("ping -c 1 -w 3 " + ipAddress); //status为0表示ping成功 int status = process.waitFor(); if (status == 0) { return true; } }catch (InterruptedException | IOException e) {             e.printStackTrace(); } return false; } 

比如ping一下qq.com:

pingIPAddress("qq.com"); 

在AndroidManifest.xml文件下，添加下面权限：

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

获取IP地址：

 public static String getHostIPAddress() {         String IPAddress = null; try {             Enumeration nis = NetworkInterface.getNetworkInterfaces(); while (nis.hasMoreElements()) {                 NetworkInterface ni = (NetworkInterface) nis.nextElement();                 Enumeration<InetAddress> ias = ni.getInetAddresses(); while (ias.hasMoreElements()) {                     InetAddress ia = ias.nextElement(); if (ia instanceof Inet6Address) { continue; }                     String hostAddress = ia.getHostAddress(); if (!"127.0.0.1".equals(hostAddress)) {                         IPAddress = hostAddress; break; } } } } catch (SocketException e) {             e.printStackTrace(); } return IPAddress; } 

在AndroidManifest.xml文件下，添加下面权限：

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

获取以太网口MAC地址：

 public static String getEthernetMacAddress() {         BufferedReader reader = null;         FileReader fr = null;         String ethernetMacAddress = null; try {             fr = new FileReader("sys/class/net/eth0/address");             reader = new BufferedReader(fr);             ethernetMacAddress = reader.readLine(); } catch (Exception e) {             e.printStackTrace(); } finally { try { if (reader != null)                     reader.close(); if (fr != null)                     fr.close(); } catch (IOException e) {                 e.printStackTrace(); } } return ethernetMacAddress; }