@Override
protected String doInBackground(Void... params) {

    try {
        GMailSender sender = new GMailSender("xxxx@gmail.com", "xxxxpassword");
        sender.sendMail("This is a testing mail",
                "This is Body of testing mail","oskr.developer1024@gmail.com",
                "oskr.developer1024@gmail.com")                   ;

    } catch (Exception e) {
        Log.e("error", e.getMessage(), e);
        return "Email No Enviado";
    }
    return "Email Enviado";
}

@Override
protected void onPostExecute(String result) {
    Log.e("LongOperation",result+"");
}
@Override
protected void onPreExecute() {

}
@Override
protected void onProgressUpdate(Void... values) {
}