Call another class method inside button
<p>I have <code>ContactUs.java</code> and <code>Mail.java</code> classes.</p>

<p>I want to call method from Mail class into <code>Contactus onclicklistner</code> method .</p>

<pre><code>    package com.hesham.sams;



public class ContactusActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_contactus);

    TextView subjectTxt = (TextView) findViewById(R.id.subjectTxt);
    TextView emailTxtus = (TextView) findViewById(R.id.emailTxtus);
    final TextView messageTxt = (TextView) findViewById(R.id.messageTxt);
    Button lButton = (Button)findViewById(R.id.sendbtn);

     String hh =  messageTxt.getText().toString();

    Spinner s = (Spinner) findViewById(R.id.spinner1);

    Typeface font = Typeface.createFromAsset(getAssets(), "extrafine.ttf");  
    subjectTxt.setTypeface(font);
    emailTxtus.setTypeface(font);
    messageTxt.setTypeface(font);

    String array_spinner[];
    array_spinner=new String[3];
    array_spinner[0]="general";
    array_spinner[1]="quisiton";
    array_spinner[2]="suggsution";

     Spinner spinner = new Spinner(this);
        ArrayAdapter&lt;String&gt; spinnerArrayAdapter = new ArrayAdapter&lt;String&gt;(
                this, android.R.layout.simple_spinner_item, array_spinner);
        spinnerArrayAdapter.setDropDownViewResource(      android.R.layout.simple_spinner_dropdown_item );

        spinner = (Spinner) findViewById( R.id.spinner1 );
        spinner.setAdapter(spinnerArrayAdapter);


    //ArrayAdapter adapter = new   ArrayAdapter(this,android.R.layout.simple_spinner_dropdown_item, array_spinner);
    //adapter.setDropDownViewResource(R.layout.special_spinner_dropdown);   
    //s.setAdapter(adapter);




        // send Botton
    //public string hesham(){


        lButton.setOnClickListener(
                new View.OnClickListener()
                {
                    public void onClick(View view)
                    {
                        // here is the proeblem 
                        Mail.send();

                    }
                });




               // ignoring 
              final class SpinnerActivity implements OnItemSelectedListener {

                    public void onItemSelected(AdapterView&lt;?&gt; parent, View view, 
                            int pos, long id) {
                        // An item was selected. You can retrieve the selected item using
                        // parent.getItemAtPosition(pos)
                        Spinner spinner = (Spinner) findViewById(R.id.spinner1);
                        spinner.setOnItemSelectedListener(this);
                    }

                    public void onNothingSelected(AdapterView&lt;?&gt; parent) {
                        // Another interface callback
                    }







            } 

}// end of on create

                } // end of class
</code></pre>

<p>second class :</p>

<pre><code>  package com.hesham.sams;

 import java.util.Date;
import java.util.Properties;
 import javax.activation.CommandMap;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

 public class Mail extends javax.mail.Authenticator { 

  private String _user; 
  private String _pass; 

  private String[] _to; 
  private String _from; 

  private String _port; 
  private String _sport; 

  private String _host; 

  private String _subject; 
  private String _body; 

  private boolean _auth; 

  private boolean _debuggable; 

  private Multipart _multipart; 


  public Mail() { 
    _host = "smtp.gmail.com"; // default smtp server 
    _port = "465"; // default smtp port 
    _sport = "465"; // default socketfactory port 

    _user = ""; // username 
    _pass = ""; // password 
    _from = ""; // email sent from 
    _subject = ""; // email subject 
    _body = ""; // email body 

    _debuggable = false; // debug mode on or off - default off 
    _auth = true; // smtp authentication - default on 

    _multipart = new MimeMultipart(); 

    // There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added. 
    MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
    mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html"); 
    mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
    mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
    mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
    mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822"); 
    CommandMap.setDefaultCommandMap(mc); 
  } 

  public Mail(String user, String pass) { 
    this(); 

    _user = user; 
    _pass = pass; 
  } 

  public boolean send() throws Exception { 
    Properties props = _setProperties(); 

    if(!_user.equals("") &amp;&amp; !_pass.equals("") &amp;&amp; _to.length &gt; 0 &amp;&amp; !_from.equals("") &amp;&amp; !_subject.equals("") &amp;&amp; !_body.equals("")) { 
      Session session = Session.getInstance(props, this); 

      MimeMessage msg = new MimeMessage(session); 

      msg.setFrom(new InternetAddress(_from)); 

      InternetAddress[] addressTo = new InternetAddress[_to.length]; 
      for (int i = 0; i &lt; _to.length; i++) { 
        addressTo[i] = new InternetAddress(_to[i]); 
      } 
        msg.setRecipients(MimeMessage.RecipientType.TO, addressTo); 

      msg.setSubject(_subject); 
      msg.setSentDate(new Date()); 

      // setup message body 
      BodyPart messageBodyPart = new MimeBodyPart(); 
      messageBodyPart.setText(_body); 
      _multipart.addBodyPart(messageBodyPart); 

      // Put parts in message 
      msg.setContent(_multipart); 

      // send email 
      Transport.send(msg); 

      return true; 
    } else { 
      return false; 
    } 
  } 

  /*public void addAttachment(String filename) throws Exception { 
    BodyPart messageBodyPart = new MimeBodyPart(); 
    DataSource source = new FileDataSource(filename); 
    messageBodyPart.setDataHandler(new DataHandler(source)); 
    messageBodyPart.setFileName(filename); 

    _multipart.addBodyPart(messageBodyPart); 
  } */

  @Override 
  public PasswordAuthentication getPasswordAuthentication() { 
    return new PasswordAuthentication(_user, _pass); 
  } 

  private Properties _setProperties() { 
    Properties props = new Properties(); 

    props.put("mail.smtp.host", _host); 

    if(_debuggable) { 
      props.put("mail.debug", "true"); 
    } 

    if(_auth) { 
      props.put("mail.smtp.auth", "true"); 
    } 

    props.put("mail.smtp.port", _port); 
    props.put("mail.smtp.socketFactory.port", _sport); 
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
    props.put("mail.smtp.socketFactory.fallback", "false"); 

    return props; 
  } 

  // the getters and setters 
  public String getBody() { 
    return _body; 
  } 

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

  // more of the getters and setters ….. 
} 
</code></pre>

<p>note: I can't use extend because each one of this class has already defend to extends another classes . 
and do you know java can't extends two classes at same time.</p>
