android.net

Class SntpClient

java.lang.Object

android.net.SntpClient

public class SntpClient
extends Object

Simple SNTP client class for retrieving network time. Sample usage:

 SntpClient client = new SntpClient();
 if (client.requestTime("time.foo.com")) {
        long now = client.getNtpTime() + Util.platformTimeMillis() - client.getNtpTimeReference();
 }
 

Constructor Summary

Constructors

Constructor and Description
SntpClient()

Method Summary

Modifier and Type	Method and Description
long	getNtpTime() Returns the time computed from the NTP transaction.
long	getNtpTimeReference() Returns the reference clock value (value of Util.platformTimeMillis()) corresponding to the NTP time.
long	getRoundTripTime() Returns the round trip time of the NTP transaction
boolean	requestTime(String host, int timeout) Sends an SNTP request to the given host and processes the response.
boolean	requestTime(String host, int port, int timeout) Sends an SNTP request to the given host and processes the response.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SntpClient

public SntpClient()

Method Detail

getNtpTime

public long getNtpTime()

Returns the time computed from the NTP transaction.

Returns:

time value computed from NTP server response.

getNtpTimeReference

public long getNtpTimeReference()

Returns the reference clock value (value of Util.platformTimeMillis()) corresponding to the NTP time.

Returns:

reference clock corresponding to the NTP time.

getRoundTripTime

public long getRoundTripTime()

Returns the round trip time of the NTP transaction

Returns:

round trip time in milliseconds.

requestTime

public boolean requestTime(String host,
                           int timeout)

Sends an SNTP request to the given host and processes the response.

Parameters:

host - host name of the server.

timeout - network timeout in milliseconds. the timeout doesn't include the DNS lookup time, and it applies to each individual query to the resolved addresses of the NTP server.

Returns:

true if the transaction was successful.

requestTime

public boolean requestTime(String host,
                           int port,
                           int timeout)

Sends an SNTP request to the given host and processes the response.

Parameters:

host - host name of the server.

port - port of the server.

timeout - network timeout in milliseconds.

Returns:

true if the transaction was successful.