SharedPreferencesFavorites

- [Instructor] To start a favorites,…we are going to use shared preferences.…Go to the Java folder,…right-click on data local,…new Java class.…Call it shared preferences favorites.…Create a private final share preferences field.…It is not initialized yet,…so press Alt+Enter and say…initialize in constructor.…

Accept the default value of null for now.…To initialize it, we will need a context,…so we'll edit as a perimeter…to the constructor in line eight,…context context.…Then, go to the next line and replace null…with context.getSharedPreferences.…We'll give it the file name favorites.xml.…And then, we are going to call the mode…context.MODE_PRIVATE,…meaning that we do not want other apps…to have access to it.…

For favorites we will need three operations.…Get, to retrieve what is previously stored,…put, to stall a new value,…and then we'll have a convenience method toggle,…which retrieves the old value,…flip it from true to false or false to true,…and then put it inside the stall…and then return the value so that we can display it.…