如何在不使用谷歌地图API的情况下获取路线箭头

I am new to Android development and navigation applications. I am developing navigation app same as Google Navigation but with different path. I am able to get my own path. Now I want to show my path in app in the same fashion as Google Navigation app does. But I don't want to use Google Navigation API. In the Google navigation app, they represent the current position by an arrow. I am new to Android development and navigation