(Compared with the previous API definition, the API V2.0.4 of Gaode has changed a lot, but it is still very easy to use. I believe that many beginners like me will think that the official demo is huge and the code is messy. So here we extract the main functions of its API (in addition to offline maps) and make a simple Demo, including symbols, POI search, road query, location, etc. The code is attached. Please change the key in the configuration file to your own. Welcome to exchange and study. This document includes the following annexes:)