To build the app for Android run the project in the Android Studio and ensure that when you open the file, you are at the right folder:
Open Android Studio (In our case, we used version 3.1.3).
Click "Open an existing Android Studio project" and select the android folder then click open.
Click the green play button to build the app.
Select the required emulator and click ok (In our case, we used Nexus 5X API 28 x86).
Navigate the app via the emulator.
To build the app for Android, follow these steps: