Android Developers: https://developer.android.com/studio/
Android Environment Setup: https://docs.unity3d.com/Manual/android-sdksetup.html
For this lesson, we will teach you how to build your Unity project for the Android platform. We will also teach you how to become an Android developer. We will then teach you how to upload and publish your Unity project to the Google Play Store. Which will make your game an app, available on all Android phones.