How to Keep API Keys Out of GitHub Repositories

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When you upload your Android app on GitHub, you need to hide it as no one has access to it except you. It is not good to push your secret things into a public repository as other people could use up your limited API calls. Sharing of API keys becomes more of a concern if the API key authenticates someone for access to a subset of data. I am going to show you how you can hide your API key in a file called gradle.properties in the Gradle folder.