You might be doing the Udacity Nanodegree or just following along with the Project Sunshine coursework. By far the hardest part is getting set up:
Assuming you got an API key and cloned the GitHub repository, the last step is opening (or creating if it doesn’t already exist) gradle.properties and adding this line of code:
The problem is that if you copy the line directly from the Udacity Google Doc you get curly quotations when you need the straight kind. So copy-paste the line. Then replace the quotes with the right kind. Then replace YOUR_API_KEY. Sync gradle and you’re off.
Incidentally, if you skip steps 1 & 3 you end up with an error similar to the following: