PreferencesManagerKT

A simple way to manage local values in your Android apps.

You can get the preferences values for the default SharedPreferenceswith default, and your custom ones with custom. The preferences saved for switches for example are saved in the default SharedPreferences.

iOS version here.

Setup

0. Add the Gson library in your build.gradle file (Optional for standard types but required for using with custom classes):

   implementation 'com.google.code.gson:gson:2.8.5'

1. Add your properties inside the PreferencesManager class (name of the values it will save):

   enum class Properties {
      isLogged,
      username, password
      // ...
   }

2. Initialize the preferences manager in the first activity of the app:

   PreferencesManager.initializeFrom(this)

   Or just use the static funciton with(context:) indicating the activity context whenever you want to access the properties:

   val isLogged = PreferencesManager.customWith(this)[Properties.isLogged, ""]

Usage

Get saved values:

val savedUsername = PreferencesManager.custom[Properties.username, ""]
val switchValue = PreferencesManager.default[Properties.music_enabled, ""]

Notes: second parameter is the default value. Also, you may want to add import com.yourpackage.PreferencesManager.Properties in the file you're using it.

Set values:

// When is only one
PreferencesManager.custom[Properties.username] = "daniel"

// Recommended when modifying multiple properties
PreferencesManager.custom.apply (
    username to Properties.username,
    password to Properties.password
)

Optional: you can change the internal preferences name value by modifying the PreferencesManager.customName property.