Android : Handler Timer

package kr.ac.sungshin.timeTest; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class timeTest extends Activity { public TextView tv; protected void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); tv = (TextView) findViewById(R.id.textview); //Handler mHandler = new Handler(); tv.postDelayed(new Runnable() { @Override public void run() { // TODO Auto-generated method stub tv.setText("Hi~"); } //Do Something }, 3000); tv.postDelayed(new Runnable() { @Override public void run() { // TODO Auto-generated method stub tv.setText("Wang~"); } //Do Something }, 6000); } }