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Android Threads and Services Introducing Services Creating a Service

enrico mattellone
enrico mattellone
6,496 Points

Error:cannot find symbol

I don't understand why it give me this error. Can someone help me to figure this out? Thanks

TwitterService.java
public class TwitterService extends Service {
  TwitterClient twitterClient = new TwitterClient();
  TwitterHandler mHandler;


  @Override
  public void onCreate() {
      TwitterThread tread = new TwitterThread();
      tread.start();
  }

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
    Message message = Message.obtain();
    message.obj = "";
    mHandler.sendMessage(message);
    return Service.START_REDELIVER_INTENT;
  }

  @Override
  public IBinder onBind(Intent intent) {
   return null; 
  }

  class TwitterThread extends Thread {
    TwitterHandler twitterHandler;
    @Override
    public void run() {
      Looper.prepare();
      twitterHandler = new TwitterHandler();
      Looper.loop();
    }
  }    

  class TwitterHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
      twitterClient.update();
    }
  }
}
MainActivity.java
public class MainActivity extends Activity {
  Button button;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    setContentView(R.layout.activity_main);

    button = (Button) findViewById(R.id.update_button);
    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v){

      }
    });
  }
}