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Android Threads and Services Threads in Android Handle it!

stuck on the message I should send

I do not know how to send or what to send as a message to the handler, I tried to send a twitterClient as an obj but it didn't work. Please help me

public class MainActivity extends Activity {
  Button button;
  TwitterClient twitterClient = new TwitterClient();

  public void onCreate(Bundle savedInstanceState) {

    final TwitterThread twitterThread = new TwitterThread();

    button = (Button) findViewById(R.id.update_button);
    button.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v){
        Message message = Message.obtain();
        message.obj = twitterClient;

  class TwitterHandler extends Handler{
    public void handleMessage(Message msg){

  class TwitterThread extends Thread {
    TwitterHandler handler = null;
    public void run() {
      handler = new TwitterHandler();