PowenKo, Android Tutorial 060-2, Thread, Runnable clock

package com.powenko.Tutorial_thread_Runnable;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;

public class Tutorial_thread_RunnableActivity extends Activity {
	// Created by PowenKo.com on 2011/2/23.
	private TextView mTextView1;
	private Handler handler;
	private int mClock=0;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mTextView1=(TextView)findViewById(R.id.textView1);
        handler = new Handler();
        handler.postDelayed(runner, 1000);

    }
    final Runnable runner = new Runnable()
    {
        public void run()
        {
        	mClock++;
        	mTextView1.setText("PowenKo.com \n Runnable timer:"+mClock);
            handler.postDelayed(this, 1000);
        }
    };

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
android:id="@+id/textView1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />

</LinearLayout>

<h3>sample code:</h3>

Tutorial_thread_Runnable