Text-to-Speech capability for Android Devices

This code snippet described the Text-to-Speech (TTS) capability. Also known as "speech synthesis" for Android Devices. TTS enables Android device to "speak" text of different languages. Mostly all Android-powered devices that are supporting the TTS functionality comes with the TTS engine integrated. But some devices lacks it. There is an API available which checks the TTS engine and install it on device if it is not there.

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

public class TextToSpeechActivity extends Activity implements OnInitListener {
 
 private int CURRENT_DATA_CHECK_CODE = 0;
 
  // Instance of TextToSpeech 
                     private TextToSpeech oTTS;
 
 // Object for the Editable Text Input
                     private EditText inputTextControl;
                     // Object for the button
 private Button speakButtonControl;
    
 @Override
    public void onCreate(Bundle savedInstanceState) {
  
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        inputTextControl = (EditText) findViewById(R.id.input_text);
        speakButtonControl = (Button) findViewById(R.id.speak_button);
        
        speakButtonControl.setOnClickListener(new OnClickListener() {   
   @Override
   public void onClick(View v) {
    String strText = inputTextControl.getText().toString();
    if (strText!=null && strText.length()>0) {
     Toast.makeText(TtsActivity.this, "Testing: " + strText, Toast.LENGTH_LONG).show();
     oTTS.speak(strText, TextToSpeech.QUEUE_ADD, null);
    }
   }
  });
        
        Intent checkIntent = new Intent();
  newIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
  // startActivityForResult will wait till the current intent will not be interpreted
                                           startActivityForResult(newIntent, CURRENT_DATA_CHECK_CODE);
  
    }
 
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (requestCode == CURRENT_DATA_CHECK_CODE) {
   if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
    // on successful call create the TTS instance
    oTTS = new TextToSpeech(this, this);
   } 
   else {
    // data may be missing so install it
    Intent installIntent = new Intent();
    installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
    startActivity(installIntent);
   }
  }

 }

 @Override
 public void onInit(int status) {  
  if (status == TextToSpeech.SUCCESS) {
   Toast.makeText(TtsActivity.this, 
     "Text-To-Speech engine has been initialized", Toast.LENGTH_LONG).show();
  }
  else if (status == TextToSpeech.ERROR) {
   Toast.makeText(TtsActivity.this, 
     "Error occurred initializing Text-To-Speech engine", Toast.LENGTH_LONG).show();
  }
 }
 
}