Android™

Send an IMAP NOOP Command

Demonstrates the Chilkat Imap.Noop method, which sends the IMAP NOOP command and waits for the server response. It is useful for verifying that an existing authenticated connection is still responsive, and for keeping the connection alive. This example connects, logs in, and sends a NOOP.

Background: Because NOOP makes an actual round trip to the server, a successful reply proves the connection is genuinely alive — something the cached IsConnected cannot. It doubles as a keep-alive to prevent an idle session from timing out. In IMAP, NOOP also gives the server a chance to report changes in the selected mailbox, such as newly-arrived messages.

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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;

    //  Demonstrates the Imap.Noop method, which sends the IMAP NOOP command and waits for the
    //  server response.  It is useful for verifying that an existing authenticated connection is
    //  still responsive and for keeping the connection alive.

    CkImap imap = new CkImap();

    imap.put_Ssl(true);
    imap.put_Port(993);

    success = imap.Connect("imap.example.com");
    if (success == false) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    success = imap.Login("user@example.com","myPassword");
    if (success == false) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    //  Send a NOOP round trip to confirm the connection is alive.
    success = imap.Noop();
    if (success == false) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    Log.i(TAG, "IMAP NOOP succeeded.");

    success = imap.Disconnect();
    if (success == false) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }


  }

  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."
  }
}