- android.permission.WRITE_EXTERNAL_STORAGE
- android.permission.READ_PHONE_STATE
- android.permission.READ_EXTERNAL_STORAGE
6/12/2017
- Add questions at the end of each lesson to find out how much lesson absorbed
- Add more mp3 examples
- Correct spelling errors
- Add more mp3 examples
V2.0
Translate first 4 lessons to English