Android 获取IP地址
最近做项目,有一个需求是Android设备获取当前IP的功能,经过一番查询资料解决了,记录下实现方法。
1.使用WIFI
首先设置用户权限
<uses-permission Android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission> <uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
其次,代码如下
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //获取wifi服务 WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); //判断wifi是否开启 if (!wifiManager.isWifiEnabled()) { wifiManager.setWifiEnabled(true); } WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int ipAddress = wifiInfo.getIpAddress(); String ip = intToIp(ipAddress); EditText et = (EditText)findViewById(R.id.EditText01); et.setText(ip); } private String intToIp(int i) { return (i & 0xFF ) + "." + ((i >> 8 ) & 0xFF) + "." + ((i >> 16 ) & 0xFF) + "." + ( i >> 24 & 0xFF) ; }
2.使用GPRS
首先,设置用户上网权限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
其次,代码如下
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("WifiPreference IpAddress", ex.toString()); } return null; }
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