android怎么实现ping

Processp=Runtime.getRuntime().exec("/system/bin/ping-c"+pingNum+""+m_strForNetAddress);//10.83.50.111m_strForNetAddress
intstatus=p.waitFor();

if(status==0){
result="success";
}
else
{
result="failed";
}
Stringlost=newString();
Stringdelay=newString();
BufferedReaderbuf=newBufferedReader(newInputStreamReader(p.getInputStream()));

Stringstr=newString();

//读出所有信息并显示
while((str=buf.readLine())!=null){
str=str+"\r\n";
tv_PingInfo.append(str);
}