(Android™) Read IMAP Email Headers

Call FetchHeaders to download only the email headers.

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);

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

    CkImap imap = new CkImap();

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    boolean success = imap.Connect("imap.someMailServer.com");
    if (success != true) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    // Login
    success = imap.Login("****","****");
    if (success != true) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    CkMessageSet messageSet;
    // We can choose to fetch UIDs or sequence numbers.
    boolean fetchUids = true;
    // Get the message IDs of all the emails in the mailbox
    messageSet = imap.Search("ALL",fetchUids);
    if (imap.get_LastMethodSuccess() != true) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    // When downloading headers, each email object contains
    // (obviously) the headers, but the body will be missing.
    // Also, attachments will not be included.  However, it is
    // possible to get information about the attachments
    // as well as the complete size of the email.
    CkEmailBundle bundle;
    bundle = imap.FetchHeaders(messageSet);
    if (imap.get_LastMethodSuccess() != true) {

        Log.i(TAG, imap.lastErrorText());
        return;
        }

    // Loop over the email objects and display information
    // about each:
    int i;
    for (i = 0; i <= bundle.get_MessageCount() - 1; i++) {
        CkEmail email;
        email = bundle.GetEmail(i);

        // Display the From and Subject
        Log.i(TAG, email.ck_from());
        Log.i(TAG, email.subject());

        // Display the recipients:
        int j;
        String name;
        String addr;
        for (j = 0; j <= email.get_NumTo() - 1; j++) {
            name = email.getToName(j);
            addr = email.getToAddr(j);
            Log.i(TAG, name + ", " + addr);
            }

        for (j = 0; j <= email.get_NumCC() - 1; j++) {
            name = email.getCcName(j);
            addr = email.getCcAddr(j);
            Log.i(TAG, name + ", " + addr);
            }

        // Show the total size of the email, including body and attachments:
        Log.i(TAG, String.valueOf(email.get_Size()));

        // When a full email is downloaded, we would use the
        // email.NumAttachments property in conjunction with the
        // email.GetMailAttach* methods.
        // However, when an email object contains only the header,
        // we need to access the attachment info differently:
        int numAttach = imap.GetMailNumAttach(email);
        for (j = 0; j <= numAttach - 1; j++) {
            Log.i(TAG, imap.getMailAttachFilename(email,j));
            int attachSize = imap.GetMailAttachSize(email,j);
            Log.i(TAG, "    size = " + String.valueOf(attachSize) + " bytes");
            }

        Log.i(TAG, "--");

        }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();


  }

  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."
  }
}