Text to speech

import android.app.Activity;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import java.util.Locale;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.speech.RecognizerIntent;
import android.content.*; 

String  str = "Hi there. This is your beloved phone speaking to you.";

TextToSpeech my_tts;
Activity activity;
Context context;

void setup() {
  fullScreen();
  background(0, 0, 200);
  fill(200);
  rect(width/4, 7*height/16, width/2, height/8);
  textAlign(CENTER, CENTER);
  textSize(60);
  fill(0);
  text("SPEAK", width/2, height/2);
  activity = this.getActivity();
  context = activity.getApplicationContext();
}

void draw(){}

void mousePressed() {
  if (mouseX < 3*width/4 && mouseX > width/4 &&
    mouseY > 7*height/16 && mouseY < 9*height/16) {
    try {
      my_tts = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
        @Override
          public void onInit(int status) {
          if (status == TextToSpeech.SUCCESS) {
            println("success");
            my_tts.setLanguage(Locale.UK);
            my_tts.speak(str, TextToSpeech.QUEUE_FLUSH, null);
          }
        }
      }
      );
    } 
    catch(Exception e) {
      println(e);
    }
  }
}

public void onPause() {
  if (my_tts !=null) {
    my_tts.stop();
    my_tts.shutdown();
  }
  super.onPause();
}