Android™

Get Current Date/Time from NIST Time Server

See more Socket/SSL/TLS Examples

Demonstrates using Chilkat Socket to connect to an NIST time server and (using the old Time Protocol (RFC 868)), will read the current GMT time.

Note: This is not necessarily the very best means for getting the current date/time. The most commonly used time protocol is the Network Time Protocol (RFC-1305).

Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocket socket = new CkSocket();

    // Connect to an NIST time server and read the current date/time
    int maxWaitMs = 4000;
    boolean useTls = false;
    success = socket.Connect("time-c.nist.gov",37,useTls,maxWaitMs);
    if (success != true) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    // The time server will send a big-endian 32-bit integer representing
    // the number of seconds since since 00:00 (midnight) 1 January 1900 GMT.
    // The ReceiveInt32 method will receive a 4-byte integer, but returns
    // true or false to indicate success.  If successful, the integer
    // is obtained via the ReceivedInt property.
    boolean bigEndian = true;
    success = socket.ReceiveInt32(bigEndian);
    if (success != true) {
        Log.i(TAG, socket.lastErrorText());
        return;
        }

    CkDateTime dt = new CkDateTime();
    dt.SetFromNtpTime(socket.get_ReceivedInt());

    // Show the current local date/time
    boolean bLocalTime = true;
    Log.i(TAG, "Current local date/time: " + dt.getAsRfc822(bLocalTime));

    maxWaitMs = 10;
    socket.Close(maxWaitMs);

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}