Write android nav / compass fragment

Fullscreen fragment for existing app. Currently it shows gps coordinates on top. On the bottom of the screen i need compass pointer. If user has choosen to navigate to waypoint then needle points to this waypoint like any handheld gps would do. Also specific data is displayed like how many km or meters to waypoint etc. If no navigation destination is choosen the needle uses phone compass and acts like actual compass, displaying N/S etc