#2 How to define and initialize a button in Android - way 2

ButtonActivity2.java

package com.blogspot.pcnlap.elegant;

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

public class MainActivity extends Activity implements OnClickListener {

	Button button;

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

		button = (Button) findViewById(R.id.button_id_from_xml);

		button.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		Toast.makeText(MainActivity.this, "I'm clicked", Toast.LENGTH_SHORT)
				.show();
	}
}