Creating a SharedPreferences utility

MainActivity.kt

val prefHelper = PreferenceHelper(this)

val myBoolean = prefHelper.getBooleanPref(PreferenceHelper.BooleanPref.setting1)
prefHelper.setBooleanPref(PreferenceHelper.BooleanPref.setting1, false)

val myString = prefHelper.getStringPref(PreferenceHelper.StringPref.setting1)
prefHelper.setStringPref(PreferenceHelper.StringPref.setting1, "abc")

PreferencesHelper.kt

import android.content.Context
import android.preference.PreferenceManager

class PreferenceHelper(val context: Context) {
    val prefs = PreferenceManager.getDefaultSharedPreferences(context)

    enum class BooleanPref(val prefId: Int, val defaultId: Int) {
        setting1(R.string.pref_boolean1, R.bool.pref_boolean1_default),
        setting2(R.string.pref_boolean2, R.bool.pref_boolean2_default)
    }

    fun getBooleanPref(pref: BooleanPref) =
        prefs.getBoolean(context.getString(pref.prefId), context.resources.getBoolean(pref.defaultId))

    fun setBooleanPref(pref: BooleanPref, value: Boolean) =
        prefs.edit().putBoolean(context.getString(pref.prefId), value).commit()

    enum class StringPref(val prefId: Int, val defaultId: Int) {
        setting1(R.string.pref_string1, R.string.pref_string1_default),
        setting2(R.string.pref_string2, R.string.pref_string2_default)
    }

    fun getStringPref(pref: StringPref) =
        prefs.getString(context.getString(pref.prefId), context.getString(pref.defaultId))!!

    fun setStringPref(pref: StringPref, value: String) =
        prefs.edit().putString(context.getString(pref.prefId), value).commit()

    enum class IntPref(val prefId: Int, val defaultId: Int) {
        setting1(R.string.pref_int1, R.integer.pref_int1_default),
        setting2(R.string.pref_int2, R.integer.pref_int2_default)
    }

    fun getIntPref(pref: IntPref) =
        prefs.getInt(context.getString(pref.prefId), context.resources.getInteger(pref.defaultId))

    fun setIntPref(pref: IntPref, value: Int) = prefs.edit().putInt(context.getString(pref.prefId), value).commit()
}

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- Booleans -->
    <string name="pref_boolean1">boolean1</string>
    <bool name="pref_boolean1_default">false</bool>
    <string name="boolean1_title">First boolean</string>
    <string name="boolean1_desc">This toggles the first boolean</string>

    <string name="pref_boolean2">boolean2</string>
    <bool name="pref_boolean2_default">false</bool>
    <string name="boolean2_title">Second boolean</string>
    <string name="boolean2_desc">This toggles the second boolean</string>

    <!-- Strings -->
    <string name="pref_string1">string1</string>
    <string name="pref_string1_default">FirstDefault</string>
    <string name="string1_title">String 1</string>
    <string name="string1_desc">Set the first string</string>

    <string name="pref_string2">string2</string>
    <string name="pref_string2_default">SecondDefault</string>
    <string name="string2_title">String 2</string>
    <string name="string2_desc">Set the second string</string>

    <!-- Int -->
    <string name="pref_int1">int1</string>
    <integer name="pref_int1_step">1</integer>
    <integer name="pref_int1_min">0</integer>
    <integer name="pref_int1_max">10</integer>
    <integer name="pref_int1_default">10</integer>
    <string name="int1_title">Int 1</string>
    <string name="int1_desc">The first integer</string>

    <string name="pref_int2">int2</string>
    <integer name="pref_int2_step">1</integer>
    <integer name="pref_int2_min">0</integer>
    <integer name="pref_int2_max">10</integer>
    <integer name="pref_int2_default">2</integer>
    <string name="int2_title">Int 2</string>
    <string name="int2_desc">The second integer</string>
</resources>