Right-click the android folder in the Project view, and select Open Module Settings. > Invalidate and Restart Open your Intellij IDEA 2017 / Android Studio 2. Android Studio installs the app on your AVD and starts it and if everything is fine with your setup and application, it will display following Emulator window −. Android studio enable annotation processing It explained essential features such as starting and stopping the Android emulator, selecting an Android virtual device (AVD) to run, creating new virtual devices, and how to edit a virtual device.