Android Open Source - BlitzMail Async Mail Task

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License

The source code is released under:

GNU General Public License

Java Source Code

/*    BlitzMail
 *    Copyright (C) 2013 Torsten Grote/*from   w  w w.  j  a  v  a 2s  . com*/
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the GNU Affero General Public License as
 *    published by the Free Software Foundation, either version 3 of the
 *    License, or (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.grobox.blitzmail;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Properties;

import org.json.JSONObject;

import android.app.PendingIntent;
import android.os.AsyncTask;
import android.preference.PreferenceManager;
import android.util.Log;

public class AsyncMailTask extends AsyncTask<Void, Void, Boolean> {
  private SendActivity activity;
  private Properties props;
  private Exception e;

  private JSONObject mail;

  public AsyncMailTask(SendActivity activity, Properties props, JSONObject mail) {
    this.activity = activity;
    this.props = props;
    this.mail = mail;
  }

  @Override
  protected Boolean doInBackground(Void... params) {
    // try to get proper hostname and set fake one if failed
    if(props.getProperty("mail.smtp.localhost", "").equals("android.com")) {
      String hostname = "";
      try {
        hostname = InetAddress.getLocalHost().getHostName();
      } catch (UnknownHostException e) {
        // do nothing
      }
      if(!hostname.equals("localhost")) {
        props.setProperty("mail.smtp.localhost",  hostname);
      }
    }

    MailSender sender = new MailSender(props);

    try {
      sender.sendMail(mail.optString("subject"), mail.optString("body"), mail.optString("cc", null), mail.optString("bcc", null));
    } catch(Exception e) {
      Log.d("AsyncMailTask", "ERROR: " + e.getMessage());

      // remember exception for when task is finished
      this.e = e;

      return false;
    }
    return true;
  }

  @Override
  protected void onPostExecute(Boolean result) {
    String msg = "";

    // set progress notification to finished
    activity.mBuilder.setProgress(0, 0, false);
    activity.mBuilder.setOngoing(false);

    // set dialog to auto close when clicked
    activity.mBuilder.setAutoCancel(true);

    if(result) {
      // Everything went fine, so delete mail from local storage
      MailStorage.deleteMail(activity, mail.optString("id"));

      // check to see if there should be a success notification
      if(!PreferenceManager.getDefaultSharedPreferences(activity).getBoolean("pref_success_notification", true)) {
        // don't show success notification
        activity.mNotifyManager.cancel(0);
        return;
      }
      // show success notification
      activity.mBuilder.setSmallIcon(R.drawable.ic_launcher);
      activity.mBuilder.setContentTitle(activity.getString(R.string.sent_mail));
      activity.notifyIntent.putExtra("ContentTitle", activity.getString(R.string.sent_mail));
      msg = mail.optString("subject");
    } else {
      activity.mBuilder.setContentTitle(activity.getString(R.string.app_name) + " - " + activity.getString(R.string.error));
      activity.notifyIntent.putExtra("ContentTitle", activity.getString(R.string.error));
      activity.mBuilder.setSmallIcon(android.R.drawable.ic_dialog_alert);

      Log.d("AsyncMailTask", e.getClass().getCanonicalName());

      if(e.getClass().getCanonicalName().equals("javax.mail.AuthenticationFailedException")) {
        msg = activity.getString(R.string.error_auth_failed);
      }
      else if(e.getClass().getCanonicalName().equals("javax.mail.MessagingException") &&
          e.getCause() != null &&
          e.getCause().getClass().getCanonicalName().equals("javax.net.ssl.SSLException") &&
          e.getCause().getCause().getClass().getCanonicalName().equals("java.security.cert.CertificateException")) {
        // TODO use MemorizingTrustManager instead, issue #1
        msg = activity.getString(R.string.error_sslcert_invalid);
      }
      else {
        msg = activity.getString(R.string.error_smtp) + '\n' + e.getMessage();
      }

      // get and show the cause for the exception if it exists
      if(e.getCause() != null) {
        Throwable ecause = e.getCause();
        Log.d("AsyncMailTask", ecause.getClass().getCanonicalName());
        msg += "\nCause: " + ecause.getMessage();
      }
    }

    // Update the notification
    activity.mBuilder.setContentText(msg);
    activity.notifyIntent.putExtra("ContentText", msg);
    activity.mBuilder.setContentIntent(PendingIntent.getActivity(activity, 0, activity.notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT));
    activity.mNotifyManager.notify(0, activity.mBuilder.build());
  }
}

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