Android之获取DNS，优先返回本地网络DNS（插网线），其次选择Wifi网络的DNS

code 参考：https://www.cnblogs.com/alex-zhao/p/5254624.html

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

/**      * 获取DNS，优先返回本地网络DNS（插网线），其次选择Wifi网络的DNS      * */     public static String getLocalDNS(Context context) {         String TAG = "WiFiUtil_getLocalDNS";         Process cmdProcess = null;         BufferedReader reader = null;         String dnsIP = "";         try {             cmdProcess = Runtime.getRuntime().exec("getprop net.dns1");             reader = new BufferedReader(new InputStreamReader(cmdProcess.getInputStream()));             dnsIP = reader.readLine();         } catch (Exception ex) {             slog.e(TAG, "获取Local网络DNS异常", ex);             return null;         } finally {             try {                 reader.close();             } catch (IOException ex) {                 slog.e(TAG, "获取Local网络DNS，关闭BufferedReader异常", ex);             }             cmdProcess.destroy();         }         if (Func.IsNullOrEmpty(dnsIP)) {             try {                 WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);                 if (wifiManager != null) {                     // 获取WIFI的DHCP数据                     DhcpInfo dhcpInfo = wifiManager.getDhcpInfo();                     if (dhcpInfo != null) {                         String dns1 = intToIp(dhcpInfo.dns1);                         String dns2 = intToIp(dhcpInfo.dns2);                         String dnsDef = "0.0.0.0";                         if (dnsDef.equals(dns1)) {                             dns1 = "";                         }                         if (dnsDef.equals(dns2)) {                             dns2 = "";                         }                         if (!Func.IsNullOrEmpty(dns1) && !Func.IsNullOrEmpty(dns2)) {                             dnsIP = dns1 + ";" + dns2;                         } else {                             dnsIP = dns1 + dns2;                         }                     }                 }             } catch (Exception ex) {                 slog.e(TAG, "获取Wifi网络DNS异常", ex);             }         }         return dnsIP;     }

 intToIp

/**
     * int转换ip地址
     */
    public static String intToIp(int address) {
        return ((address & 0xFF) + "." +
                ((address >>>= 8) & 0xFF) + "." +
                ((address >>>= 8) & 0xFF) + "." +
                ((address >>>= 8) & 0xFF));
    }