Created
June 1, 2018 13:26
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Kotlin extension for SharedPreferences
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| import android.content.Context | |
| import android.content.SharedPreferences | |
| import android.preference.PreferenceManager | |
| /** | |
| * | |
| * GET/SET | |
| * val protectAtStart = defaultPrefs(context)["key", "defaultValue"] | |
| * defaultPrefs(context)["key"] = "myValue" | |
| * | |
| * GET/SET w/ Anko inside an Actitivy/Fragment | |
| * val protectAtStart = defaultSharedPreferences["key", "defaultValue"] | |
| * defaultSharedPreferences["key"] = "myValue" | |
| * | |
| */ | |
| fun defaultPrefs(context: Context): SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context) | |
| private inline fun SharedPreferences.edit(f: SharedPreferences.Editor.() -> Unit) { | |
| val editor = edit() | |
| editor.f() | |
| editor.apply() | |
| } | |
| inline operator fun <reified T> SharedPreferences.get(key: String, defValue: T): T { | |
| return when (T::class) { | |
| Int::class -> getInt(key, defValue as Int) as T | |
| String::class -> getString(key, defValue as String) as T | |
| Boolean::class -> getBoolean(key, defValue as Boolean) as T | |
| Long::class -> getLong(key, defValue as Long) as T | |
| else -> defValue | |
| } | |
| } | |
| operator fun SharedPreferences.set(key: String, value: Any?) { | |
| when (value) { | |
| is String -> edit({ putString(key, value) }) | |
| is Int -> edit({ putInt(key, value) }) | |
| is Boolean -> edit({ putBoolean(key, value) }) | |
| is Float -> edit({ putFloat(key, value) }) | |
| is Long -> edit({ putLong(key, value) }) | |
| else -> throw UnsupportedOperationException("Not yet implemented") | |
| } | |
| } |
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