FileEncryptionDemoViewModel.kt

private val sharedPreferences by lazy {
    //The name of the file on disk will be this, plus the ".xml" extension.
    val sharedPrefsFile = "sharedPrefs"

    //Create the EncryptedSharedPremises using the key above
    EncryptedSharedPreferences.create(
        sharedPrefsFile,
        mainKeyAlias,
        getApplication(),
        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
    )
}