Summary What is purpose of data persistence? Why would the data persistence be an issue when user changes the orientation in the app? What can SharedPreferences class do? How to write data into an SharedPreferences object? How to read data from an sharedPreferences object? What is the usage of SQLiteOpenHelper class? 49Summary • What is purpose of data persistence? • Why would the data persistence be an issue when user changes the orientation in the app? • What can SharedPreferences class do? • How to write data into an SharedPreferences object? • How to read data from an SharedPreferences object? • What is the usage of SQLiteOpenHelper class? 49