You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
With PreferenceHolder, you can define different preference fields this way:
object Pref: PreferenceHolder() {
var canEatPie:Boolean by bindToPreferenceField(true)
}
And use it this way:
if(Pref.canEatPie) //...
Here are other preference definition examples: (see full example and usage)
object UserPref: PreferenceHolder() {
var canEatPie:Boolean by bindToPreferenceField(true)
var allPieInTheWorld:Long by bindToPreferenceField(0)
var isMonsterKiller:Boolean? by bindToPreferenceFieldNullable()
var monstersKilled:Int? by bindToPreferenceFieldNullable()
// Property with backup is reading stored value in the first usage, // and saving it, in background, each time it is changed.var experience:Float? by bindToPropertyWithBackup(-1.0F)
var className:String? by bindToPropertyWithBackupNullable()
// Any type can used if serializer is set. See: Gson serializationvar character:Character? by bindToPreferenceFieldNullable()
var savedGame:Game? by bindToPreferenceFieldNullable()
// Single level collections are also supported if serializer is set. See: Gson serializationvar longList:Map<Int, Long> by bindToPreferenceField(mapOf(0 to 12L, 10 to 143L))
var propTest:List<Character>? by bindToPropertyWithBackupNullable()
var elemTest:Set<Elems> by bindToPreferenceField(setOf(Elems.Elem1, Elems.Elem3))
}
There must be application Context added to PreferenceHolder companion object. Example:
It it suggested to do it in project Application class. As an alternative, PreferenceHolderApplication can also be added as a name of an application in AndroidManifest: (example)
When it is turned on, then all properties are acting just like normal properties without binding to preference field. This allows to make unit tests to presenters and to use cases that are using instance of PreferenceHolder.
Install
To add PreferenceHolder to the project, add to build.gradle file:
Since then, we can use all types, even one not supported by SharedPreference (like custom objects Character and Game, or collections)
Other libraries
If you like it, remember to leave the star and check out my other libraries:
ActivityStarter - Simple Android Library, that provides easy way to start and save state of Activities, Fragments, Services and Receivers with arguments.
VideoPlayView - Custom Android view with video player, loader and placeholder image
KotlinAndroidViewBindings - Bindings for properties with simple Kotlin types (Boolean, String) to layout traits (visibility, text).
License
Copyright 2017 Marcin Moskała
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.