hello android

package hello.android;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class HelloWorldActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button bn = (Button)findViewById(R.id.ok);
        bn.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				final TextView show = (TextView) findViewById(R.id.show);
				show.setText("Hello android - " + new java.util.Date());
			}
        	
        });
    }
}