(Android™) Process Large POP3 Mailbox

Demonstrates how to read email from a mailbox that may contain a large number of emails.

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.

    CkMailMan mailman = new CkMailMan();

    mailman.put_MailHost("pop.example.com");

    mailman.put_PopUsername("myLogin");
    mailman.put_PopPassword("myPassword");

    mailman.put_MailPort(995);
    mailman.put_PopSsl(true);

    // Get the list of UIDLs for all emails in the mailbox.
    CkStringArray sa = mailman.GetUidls();
    if (mailman.get_LastMethodSuccess() == false) {
        Log.i(TAG, mailman.lastErrorText());
        return;
        }

    int i;
    int numEmails = sa.get_Count();
    if (numEmails == 0) {
        Log.i(TAG, "Mailbox is empty");
        return;
        }

    int chunkSize = 6;

    // Download the emails in chunks of 6 emails each.
    int chunkBeginIdx = 0;
    int chunkEndIdx = chunkSize - 1;
    if (chunkEndIdx >= numEmails) {
        chunkEndIdx = numEmails - 1;
        }

    CkStringArray saChunk = new CkStringArray();
    while ((chunkBeginIdx < numEmails)) {

        Log.i(TAG, String.valueOf(chunkBeginIdx) + " to " + String.valueOf(chunkEndIdx));

        // Build a chunk of UIDLs.
        saChunk.Clear();
        for (i = chunkBeginIdx; i <= chunkEndIdx; i++) {
            saChunk.Append(sa.getString(i));
            }

        // Log the UIDLs in this chunk...
        String chunkStr = saChunk.saveToText();
        Log.i(TAG, chunkStr);

        // Download this chunk of email from the POP3 server.
        CkEmailBundle bundle = mailman.FetchMultiple(saChunk);
        if (mailman.get_LastMethodSuccess() == false) {
            Log.i(TAG, mailman.lastErrorText());
            return;
            }

        Log.i(TAG, "Downloaded " + String.valueOf(bundle.get_MessageCount()) + " emails.");
        Log.i(TAG, "----");

        // Process the bundle...
        // (your application's processing code goes here...)

        // Get the next chunk...
        chunkBeginIdx = chunkBeginIdx + chunkSize;
        chunkEndIdx = chunkEndIdx + chunkSize;
        if (chunkEndIdx >= numEmails) {
            chunkEndIdx = numEmails - 1;
            }

        }


  }

  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."
  }
}