android如何ping域名解析

import java.io.BufferedReader;
import java.io.InputStreamReader;

public String ping(String url) {
    String pingResult = "Error. Ping failed.";

    try {
        Process process = new ProcessBuilder()
                .command("/system/bin/ping", url)
                .redirectErrorStream(true)
                .start();

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

        StringBuilder stringBuilder = new StringBuilder();
        String line;

        while ((line = bufferedReader.readLine()) != null) {
            stringBuilder.append(line);
        }

        bufferedReader.close();
        process.destroy();
        pingResult = stringBuilder.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return pingResult;
}

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

import java.net.InetAddress;
import java.net.UnknownHostException;

public boolean ping(String hostname) {
    try {
        return InetAddress.getByName(hostname).isReachable(1000);
    } catch (UnknownHostException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return false;
}