This project uses the Gradle build system. You don't need an IDE to build and execute it but Android Studio is recommended.

1. Download the project code, preferably using git clone.
2. In Android Studio, select File | Open... and point to the ./build.gradle file.
3. Check out the relevant code:
   • The C++ sources and tests are in src/main/cpp
   • The device tests (which wrap the native tests) are in src/androidTest/java
4. Create and run the Instrumented test configuration
   • Open the AdderTest file, and click the run icon in the gutter, or
   • Manually create a configuration.
     • Open Run menu | Edit Configurations
     • Add a new Android Instrumented Tests configuration
     • Choose the app module
     • Connect a device or start an emulator
     • Run the newly created configuration

If you are using Android Studio, the Run window will show the test results.