Android™

Compute Difference Between Two DateTime Strings

Demonstrates how to compute the difference between two datetime strings. 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);

    // Imagine we have these strings:

    String t1 = "2022-11-14 15:45:38";
    String t2 = "2022-11-16 17:23:41";

    // How many minutes are between the two?

    // First, we'd want load each date/time into a Chilkat CkDateTime object.
    // In this case, there are no CkDateTime methods that accept the above format.
    // However.. the CkDateTime's SetFromTimestamp will accept a date in the format "YYYY-MM-DDThh:mm:ssZ"

    // First modify the above dates to the timestamp format.
    CkStringBuilder sb1 = new CkStringBuilder();
    sb1.Append(t1);
    int count = sb1.Replace(" ","T");
    sb1.Append("Z");

    CkStringBuilder sb2 = new CkStringBuilder();
    sb2.Append(t2);
    count = sb2.Replace(" ","T");
    sb2.Append("Z");

    // Load each into a CkDateTime
    CkDateTime dt1 = new CkDateTime();
    dt1.SetFromTimestamp(sb1.getAsString());
    // verify...
    Log.i(TAG, dt1.getAsTimestamp(false));

    CkDateTime dt2 = new CkDateTime();
    dt2.SetFromTimestamp(sb2.getAsString());
    // verify...
    Log.i(TAG, dt2.getAsTimestamp(false));

    // Get the difference in seconds
    int diffSeconds = dt2.DiffSeconds(dt1);
    Log.i(TAG, "Difference in seconds: " + String.valueOf(diffSeconds));
    Log.i(TAG, "Difference in minutes: " + String.valueOf(diffSeconds / 60));

  }

  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."
  }
}