public void setKeyboardButtonClickedListener(KeyboardButtonClickedListener keyboardButtonClickedListener) {
        this.mKeyboardButtonClickedListener = keyboardButtonClickedListener;
        for(KeyboardButtonView button : mButtons) {
            button.setOnRippleAnimationEndListener(mKeyboardButtonClickedListener);
        }
    }
Set the {@link com.andexert.library.RippleAnimationListener} to the
{@link com.github.omadahealth.lollipin.lib.views.KeyboardButtonView}
lib/src/main/java/com/github/omadahealth/lollipin/lib/views/KeyboardView.java