参考下方 PingUtil.java 代码文章来源地址https://www.toymoban.com/news/detail-625382.html
import android.content.Context;
import android.net.DhcpInfo;
import android.net.wifi.WifiManager;
import android.text.format.Formatter;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.net.InetAddress;
import java.util.LinkedList;
public class PingUtil {
/**
* 获取网关(API>=29)
*/
public static String getGateway(Context context) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
DhcpInfo dhcpInfo = wifiManager.getDhcpInfo();
int gateway = dhcpInfo.gateway;
return Formatter.formatIpAddress(gateway);
}
/**
* 获取dns
*/
public static String getDns() {
String[] dnsServers = getDnsFromCommand();
// 组装
StringBuffer sb = new StringBuffer();
if (dnsServers != null) {
sb.append(dnsServers[0]); //注意这里只会返回1个dns服务器ip
}
return sb.toString();
}
//通过 getprop 命令获取
private static String[] getDnsFromCommand() {
LinkedList<String> dnsServers = new LinkedList<>();
try {
Process process = Runtime.getRuntime().exec("getprop");
InputStream inputStream = process.getInputStream();
LineNumberReader lnr = new LineNumberReader(new InputStreamReader(inputStream));
String line = null;
while ((line = lnr.readLine()) != null) {
int split = line.indexOf("]: [");
if (split == -1) continue;
String property = line.substring(1, split);
String value = line.substring(split + 4, line.length() - 1);
if (property.endsWith(".dns")
|| property.endsWith(".dns1")
|| property.endsWith(".dns2")
|| property.endsWith(".dns3")
|| property.endsWith(".dns4")) {
InetAddress ip = InetAddress.getByName(value);
if (ip == null) continue;
value = ip.getHostAddress();
if (value == null) continue;
if (value.length() == 0) continue;
dnsServers.add(value);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return dnsServers.isEmpty() ? new String[0] : dnsServers.toArray(new String[dnsServers.size()]);
}
}
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