Unicode Keypress recognise

Hello, I am trying to simply println a value when a non alphabetical key is pressed in the keyboard on an Android Tablet. Specifically I hope to recognise if an emoji key has been pressed.

I cannot seem to get any kind of unicode to convert to char. I have been looking at this post to try and implement the given example but I cannot get it to compile successfully. https://forum.processing.org/two/discussion/9296/getunicodechar-in-android-mode#latest

I am running Android KitKat 4.4.4

I have also been trying to get a simple keycode to be recognised via the code below:

    import android.view.KeyEvent;
    KeyEvent event;
    boolean keyboard = false;
    int unicodeChar=0;

    void setup() {
      fullScreen();
      textFont(createFont("SansSerif", 40 * displayDensity));
      fill(0);
      unicodeChar = event.getUnicodeChar();
    }

    void draw() {
      background(255);
      text(key, width/2, height/2-50);
    }

    void keyPressed() {
      background(200, 50, 30);
      if (key == CODED)
      {
        println("code => " + keyCode);

        if (key==unicodeChar) {

          println("unicode" + unicodeChar);
        }
      } else
        println(key);
    }

    void mousePressed() {
      if (!keyboard) {
        openKeyboard();
        keyboard = true;
      } else {
        closeKeyboard();
        keyboard = false;
      }
    }

From reading the emoji and unicode posts for java based Processing it seems there are issues with being able to implement emoji unicode. However, I wonder if the same issues carry over into Android mode?

Any pointers in the right direction would be really appreciated. thanks