Android : How can I make a drop-down menu appear if a sprite is tapped? (LibGDX)

I've looked at a few examples already but can't get it to work. I want a drop down menu to appear when a sprite is tapped. Here is my code for detecting the sprite being tapped (a Pause button):

public boolean isTapped(Sprite image, int x, int y) {
    return (x >= image.getX()
            && x <= image.getX() + image.getWidth()
            && y >= image.getY() && y <= image.getY()
            + image.getHeight());
}

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    if(isTapped(pauseButtonImage, screenX, screenY)) {
        // Make a drop-down menu appear below the sprite
    }

    return true;
}

I'm not entirely sure what to fill that if-statement with in order to get the drop-down menu. I've seen some examples online but they are somewhat unclear and always looks like there is way too much code than necessary.

All I want is a list

RETURN TO MENU

RESTART LEVEL

EXIT

Can anybody give me the steps I need to take to achieve this? Or perhaps point me to some relevant documentation. Would be highly appreciated.