TrivialDriveJava/app/src/main/java/com/sample/android/trivialdrivesample/ui/MakePurchaseAdapter.java
TrivialDriveKotlin/app/src/main/java/com/sample/android/trivialdrivesample/ui/MakePurchaseAdapter.java

TrivialDriveJava/app/src/main/java/com/sample/android/trivialdrivesample/billing/Security.java
TrivialDriveKotlin/app/src/main/java/com/sample/android/trivialdrivesample/billing/Security.java

TrivialDriveJava/app/src/main/java/com/sample/android/trivialdrivesample/ui/MakePurchaseFragment.java
TrivialDriveKotlin/app/src/main/java/com/sample/android/trivialdrivesample/ui/MakePurchaseFragment.java

TrivialDriveJava/app/src/main/java/com/sample/android/trivialdrivesample/ui/MainActivity.java
TrivialDriveKotlin/app/src/main/java/com/sample/android/trivialdrivesample/ui/MainActivity.java

TrivialDriveJava/app/src/main/java/com/sample/android/trivialdrivesample/ui/GameFragment.java
TrivialDriveKotlin/app/src/main/java/com/sample/android/trivialdrivesample/ui/GameFragment.java