Android 获取手机当前外网IP 安卓机怎么看外网

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墨色天香 2023-09-04 11:19:59

文章标签 Android 获取手机当前外网IP android java 开发语言 DNS 文章分类 Android 移动开发

1、查了很多资料最终就两种可行方案

1、通过ping方式

public static  boolean isNetworkOnline() {
        Runtime runtime = Runtime.getRuntime();
        try {
            Process ipProcess = runtime.exec("ping -c 3 114.114.114.114");
            int exitValue = ipProcess.waitFor();
            return (exitValue == 0);
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
        return false;
    }

2、通过socket检查

/**
     * 通过socket检查外网的连通性
     */
    private static Socket s ;
    public static boolean hasNetworkConnection(Context context){
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        boolean connected = (null != activeNetworkInfo) && activeNetworkInfo.isConnected();
        if(!connected) return false;
        boolean routeExists ;
        try {
            if(s==null){
                s = new Socket();
            }
            InetAddress host = InetAddress.getByName("114.114.114.114");//国内使用114.114.114.114，如果全球通用google：8.8.8.8
            s.connect(new InetSocketAddress(host,80),5000);//google:53
            routeExists = true;
            s.close();
        } catch (IOException e) {
            routeExists = false ;
        }

        return connected && routeExists ;
    }

3.通过域名查找ip地址

/**
     * 解析域名获取IP数组
     * @param host
     * @return
     */
    public static String[] parseHostGetIPAddress(String host) {
        String[] ipAddressArr = null;
        try {
            InetAddress[] inetAddressArr = InetAddress.getAllByName(host);
            if (inetAddressArr != null && inetAddressArr.length > 0) {
                ipAddressArr = new String[inetAddressArr.length];
                for (int i = 0; i < inetAddressArr.length; i++) {
                    ipAddressArr[i] = inetAddressArr[i].getHostAddress();
                }
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
            return null;
        }
        return ipAddressArr;
    }

解释：