Android / สอบถามเรื่อง การเพิ่ม ImageButton เป็น 2 button จาก Code ของ TTS

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener,OnInitListener {
	// TTS object
	private TextToSpeech myTTS;
	// status check code
	private int MY_DATA_CHECK_CODE = 0;

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

		// get a reference to the button element listed in the XML layout
		ImageButton speakButton = (ImageButton) findViewById(R.id.imageButton1);
		// listen for clicks
		speakButton.setOnClickListener(this);
		// check for TTS data
		Intent checkTTSIntent = new Intent();
		checkTTSIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
		startActivityForResult(checkTTSIntent, MY_DATA_CHECK_CODE);
	}

	@Override
	public void onInit(int initStatus) {
		// TODO Auto-generated method stub
		//check for successful instantiation
		if (initStatus == TextToSpeech.SUCCESS) {
			if(myTTS.isLanguageAvailable(Locale.US)==TextToSpeech.LANG_AVAILABLE)
				myTTS.setLanguage(Locale.US);
		}
		else if (initStatus == TextToSpeech.ERROR) {
			Toast.makeText(this, "Sorry! Text To Speech failed...", Toast.LENGTH_LONG).show();
		}

	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		// get the text entered
		String words = "In Thailand";
		speakWords(words);
	}

	private void speakWords(String speech) {

		// speak straight away
		myTTS.speak(speech, TextToSpeech.QUEUE_FLUSH, null);
	}
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {

		if (requestCode == MY_DATA_CHECK_CODE) {
			if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
				//the user has the necessary data - create the TTS
			myTTS = new TextToSpeech(this, this);
			}
			else {
					//no data - install it now
				Intent installTTSIntent = new Intent();
				installTTSIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
				startActivity(installTTSIntent);
			}
		}
	}

}