Unreal Engine 4 (UE4) uses a special version of the Android Software Development Kit (SDK), called CodeWorks for Android 1R6u1. This version of CodeWorks for Android is the easiest way to setup the SDK and Native Development Kit (NDK) needed to develop Android projects with UE4. Although we're currently using version 1R6u1, we intend to use subsequent releases of CodeWorks. If you have other versions of the Android SDK installed (or, older versions of CodeWorks for Android), we recommend that you uninstall them and install CodeWorks for Android, using the CodeWorks for Android installer that's being distributed with UE4. In the following section, we will cover how to get CodeWorks for Android 1R6u1 installed on a development PC.