What Async task or Thread should i use in sending email

Question

i really dont know what to in my code. I already tried the suggested code here in stackoverflow but still didnt get the right Async task or Thread. I always get error trying those recommended code. please someone help me how to do the right Async task or Thread. here is my code:

final Button send = (Button) this.findViewById(R.id.send);
    send.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            try {   
                GMailSender sender = new GMailSender((from.getText().toString()), 
                (pass.getText().toString()));
                sender.sendMail((subject.getText().toString()),   
                      (body.getText().toString()),   
                      (from.getText().toString()),   
                      (to.getText().toString()));   

            } catch (Exception e) {   
                Log.e("SendMail", e.getMessage(), e);   
            } 

        }
    });

and here is my GmailSender:

public class GMailSender extends javax.mail.Authenticator {   
private String mailhost = "smtp.gmail.com";   
private String user;   
private String password;   
private Session session;
private String[] _to;
private String _from;
private String _subject;
private String _body;  

static {   
    Security.addProvider(new com.provider.JSSEProvider());   
}  

public GMailSender(String editable, String password) {   
    this.user = editable;   
  //  this.password = password;   

    Properties props = new Properties();   
    props.setProperty("mail.transport.protocol", "smtp");   
    props.setProperty("mail.host", mailhost);   
    props.put("mail.smtp.auth", "true");   
    props.put("mail.smtp.port", "465");   
    props.put("mail.smtp.socketFactory.port", "465");   
    props.put("mail.smtp.socketFactory.class",   
            "javax.net.ssl.SSLSocketFactory");   
    props.put("mail.smtp.socketFactory.fallback", "false");   
    props.setProperty("mail.smtp.quitwait", "false");   

    session = Session.getDefaultInstance(props, this);   
   }   

    protected PasswordAuthentication getPasswordAuthentication() {   
    return new PasswordAuthentication(user, password);   
   }   

   public synchronized void sendMail(String subject, String body, String sender,     
   String recipients) throws Exception {   
    try{
    MimeMessage message = new MimeMessage(session);   
    DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), 
    "text/plain"));   
    message.setSender(new InternetAddress(sender));   
    message.setSubject(subject);   
    message.setDataHandler(handler);   
    if (recipients.indexOf(',') > 0)   
        message.setRecipients(Message.RecipientType.TO, 
    InternetAddress.parse(recipients));   
    else  
        message.setRecipient(Message.RecipientType.TO, new 
    InternetAddress(recipients));   
    Transport.send(message);   
    }catch(Exception e){

    }
   }   

   public class ByteArrayDataSource implements DataSource {   
    private byte[] data;   
    private String type;   

    public ByteArrayDataSource(byte[] data, String type) {   
        super();   
        this.data = data;   
        this.type = type;   
    }   

    public ByteArrayDataSource(byte[] data) {   
        super();   
        this.data = data;   
    }   

    public void setType(String type) {   
        this.type = type;   
    }   

    public String getContentType() {   
        if (type == null)   
            return "application/octet-stream";   
        else  
            return type;   
    }   

    public InputStream getInputStream() throws IOException {   
        return new ByteArrayInputStream(data);   
    }   

    public String getName() {   
        return "ByteArrayDataSource";   
    }   

    public OutputStream getOutputStream() throws IOException {   
        throw new IOException("Not Supported");   
    } 

    }


    public String getBody() { 
    return _body; 
    } 

    public void setBody(String _body) { 
    this._body = _body; 
    }

    public String[] getTo() {
    return _to;
    }

    public void setTo(String[] _to) {
      this._to=_to;
    }

    public void setFrom(String string) {
      // TODO Auto-generated method stub
       this.set_from(string);
    }

    public void setSubject(String string) {
      this.set_subject(string);
    }

public String get_from() {
    return _from;
}

public void set_from(String _from) {
    this._from = _from;
}

public String get_subject() {
    return _subject;
}

public void set_subject(String _subject) {
    this._subject = _subject;
}
 }  

Sorry for asking this kind of questions all over again. I just cant get the right answer. Any help would be appreciated. Thank you very much in advance.. T.T .

Answer 1

You can start a thread in onClick event, it will prevetn ANR, also you can try to show progress bar while your app trying to send EMail.