得到设备的ip

最新推荐文章于 2025-06-07 16:11:38 发布

原创最新推荐文章于 2025-06-07 16:11:38 发布 · 98 阅读

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本文介绍了在Android设备上通过不同方式获取当前设备IP地址的方法。包括使用WifiManager获取连接信息、利用Socket获取本地地址及解析NetworkInterface来查找非回环IP等。这些方法适用于不同场景下的网络编程需求。

WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();

try {
    Socket socket = new Socket("www.droidnova.com", 80);
    Log.i("", socket.getLocalAddress().toString());
} catch (Exception e) {
    Log.i("", e.getMessage());
}

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(LOG_TAG, ex.toString());
    }
    return null;
}

WifiManager wifiManager =  
 (WifiManager)getSystemService(WIFI_SERVICE);
DhcpInfo dhcpInfo = wifiManager.getDhcpInfo();
 
String[] dhcpInfos = dhcpInfo.toString().split(" ");
String realIP = "oops, no ip";
int i = 0;
while (i < dhcpInfos.length) {
  if (dhcpInfos[i].equals("ipaddr")) {
    realIP = dhcpInfos[i+1];
    break;
  }
  i++;
}

WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
    WifiInfo wifiInfo = wifiManager.getConnectionInfo();
    DhcpInfo dhcpInfo = wifiManager.getDhcpInfo();

// [...]

tv = (TextView) findViewById(R.id.id_wlan_ip_address);
tv.setText(intToIp(dhcpInfo.ipAddress));

// [...]

    /**
     * http://teneo.wordpress.com/2008/12/23/java-ip-address-to-integer-and-back/
     */
    private String intToIp(int i) {
    return ( i        & 0xFF) + "." +
    ((i >> 8 ) & 0xFF) + "." +
    ((i >> 16 ) & 0xFF) + "." +
        ((i >> 24 ) & 0xFF)
        ;
    }