Fetch a Text IMAP Attachment into a StringBuilder

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Demonstrates the Chilkat Imap.FetchAttachmentSb method, which decodes one text attachment into a StringBuilder. The first argument is the Email, the second is the zero-based attachment index, the third is the charset used to decode the bytes, and the fourth is the StringBuilder, which is cleared first. This example decodes the first attachment as UTF-8.

// 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.FetchAttachmentSb method, which downloads one text attachment and
    //  decodes it into a StringBuilder.  The 1st argument is the Email, the 2nd is the zero-based
    //  attachment index, the 3rd is the charset used to decode, and the 4th is the StringBuilder
    //  (cleared first).
    //  
    //  The message is fetched headers-only, then the attachment is downloaded on demand.

    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;
        }

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

    //  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
    //  metadata describing the attachments is present, so the attachment info methods still work.
    boolean headersOnly = true;
    boolean useUid = false;
    int seqNum = 1;
    CkEmail email = new CkEmail();
    success = imap.FetchEmail(headersOnly,seqNum,useUid,email);
    if (success == false) {
        Log.i(TAG, imap.lastErrorText());
        return;
        }

    int numAttach = imap.GetMailNumAttach(email);
    if (numAttach > 0) {
        //  Download the first (text) attachment and decode it as UTF-8.  Use this only for text.
        CkStringBuilder sb = new CkStringBuilder();
        success = imap.FetchAttachmentSb(email,0,"utf-8",sb);
        if (success == false) {
            Log.i(TAG, imap.lastErrorText());
            return;
            }

        String attachText = sb.getAsString();
        Log.i(TAG, attachText);
        }

    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."
  }
}