Constructor for the PianoView

PianoView.java

public PianoView(Context context, AttributeSet attrs) {
  super(context, attrs);
  black = new Paint();
  black.setColor(Color.BLACK);
  white = new Paint();
  white.setColor(Color.WHITE);
  white.setStyle(Paint.Style.FILL);
  yellow = new Paint();
  yellow.setColor(Color.YELLOW);
  yellow.setStyle(Paint.Style.FILL);
  soundPlayer = new AudioSoundPlayer(context);
}