要获取当前网络连接类型：

TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

int networkType = telephonyManager.getNetworkType();

并为延迟：

String host = "172.16.0.2";

int timeOut = 3000;

long[] time = new long[5];

Boolean reachable;

for(int i = 0; i < 5; i++)

{

long BeforeTime = System.currentTimeMillis();

reachable = InetAddress.getByName(host).isReachable(timeOut);

long AfterTime = System.currentTimeMillis();

Long TimeDifference = AfterTime - BeforeTime;

time[i] = TimeDifference;

}