Final answer:
To permanently save values in an app, Shared Preferences class is used, which stores data in key-value pairs. This method is suitable for saving user preferences or small amounts of data, but not for large data sets. Shared Preferences are app-specific and accessible only within the app.
Step-by-step explanation:
To permanently save values in your app, you can use the Shared Preferences class. This is a way to store private, primitive data in key-value pairs. Shared Preferences are perfect for saving user preferences or other small amounts of data. To use Shared Preferences, you call methods like get Shared Preferences() to retrieve a Shared Preferences instance pointing to the file that contains the values you want to read or write. You then use Shared Preferences. Editor to make modifications and commit the changes back to the Shared Preferences.
For instance, to save a string value you would do something like: Shared Preferences shared Pref = get Activity(). get Preferences(Context. MODE_PRIVATE); Shared Preferences. Editor editor = shared Pref. edit(); editor. put String("my_key", "value_to_save"); editor. apply(); To retrieve the saved value, you would use: String value = shared Pref. get String("my_key", "default_value");