Android สอบถามเรื่องคำสั่งเปลี่ยนหน้าโดยไม่ต้องกดปุ่ม ใครรู้รบกวนตอบทีครับผม

package com.example.asian;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {

	private static final int REFRESH_SCREEN = 1;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
		requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
        
        setContentView(R.layout.activity_main);
        
        startScan();
    }
    
	public void startScan() {
		new Thread() {
			public void run() {					
				try{			
					Thread.sleep(3000);
					hRefresh.sendEmptyMessage(REFRESH_SCREEN);
				}catch(Exception e){
				}
			}
		}.start();
	}
	
	Handler hRefresh = new Handler(){
		public void handleMessage(Message msg) {
			switch(msg.what){
			case REFRESH_SCREEN:
				
	           	Intent newActivity = new Intent(MainActivity.this,HomeActivity.class);
            	startActivity(newActivity);
				
				break;
			default:
				break;
			}
		}
	};

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    
}