(Android™) Query NTP Server for Current Date/Time

Demonstrates how to query an NTP server to get the current date/time.

Note: This feature was added in Chilkat v9.5.0.96.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    // Specify the NTP server domain.
    // Information is passed in a JSON object to allow for any unanticipated future optional information that might need to be provided.
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("ntp_server","pool.ntp.org");

    // Query the NTP server for the current date/time.
    CkDateTime dt = new CkDateTime();
    // Note: The SetFromNtpServer method is available starting in v9.5.0.96 for most Chilkat builds, but not all.
    // If the SetFromNtpServer method is not present, contact support@chilkatsoft.com for a hotfix build.
    // It should be available in all programming languages/platforms starting in v9.5.0.97
    boolean success = dt.SetFromNtpServer(json.emit());
    if (success == false) {
        Log.i(TAG, dt.lastErrorText());
        return;
        }

    // Show the date/time in various formats..
    boolean bLocalTime = true;
    Log.i(TAG, dt.getAsTimestamp(bLocalTime));
    Log.i(TAG, dt.getAsRfc822(bLocalTime));
    Log.i(TAG, String.valueOf(dt.GetAsUnixTime(bLocalTime)));

    // Sample output:

    // 2023-10-31T09:43:27-05:00
    // Tue, 31 Oct 2023 09:43:27 -0500
    // 1698745407

  }

  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."
  }
}