com/example/exp6/SecondActivity.java
 com.example.exp6.SecondActivity
 com.example.exp6.SecondActivity$1
 com.example.exp6.SecondActivity$2
com/example/exp6/MainActivity.java
 com.example.exp6.MainActivity
 com.example.exp6.MainActivity$1
 com.example.exp6.MainActivity$2
com/example/exp6/BuildConfig.java
 com.example.exp6.BuildConfig
com/example/exp6/SharedPrefManager.java
 com.example.exp6.SharedPrefManager