What is the role and purpose of setting data storage preferences?

Setting up data storage preferences (SharedPreferences in Android) is used for saving simple key-value pairs, such as user settings, status flags, or small configuration data. It is a lightweight way to store data that should persist between app sessions, for example, selected theme, language, or login status.

Advantages:

• Easy to use
• Fast access to data
• Data is stored in an XML file, convenient for small amounts of data

Example usage:

val sharedPref = context.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE)
with(sharedPref.edit()) {
    putString("username", "user123")
    putBoolean("isLoggedIn", true)
    apply()
}

val username = sharedPref.getString("username", "defaultUser")