An android skin change framework

Load custom ui style from skin package

api("io.github.hellogoogle2000:android-skinner:1.0.0")

suggest calling after Application#onCreate

SkinnerKit.init(application)

call before apply this skin

SkinnerKit.installSkin(assets.open("skin.apk"), "skinner")

suggest calling before Activity#onCreate

SkinnerKit.installSkinnerFactory(activity)

recall Activity#setContentView to take effect

SkinnerKit.loadSkin("skinner")

recall Activity#setContentView to take effect

SkinnerKit.setSkinMode(SkinnerValues.SKIN_MODE_DARK)

recall Activity#setContentView to take effect

SkinnerKit.loadSkin(SkinnerValues.SKIN_NAME_DEFAULT)
SkinnerKit.setSkinMode(SkinnerValues.SKIN_MODE_DEFAULT)

• add skin namespace
• specify provider
• dynamic resource should named end with _skinnable

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:skin="http://schemas.android.com/skin"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@color/background_color_01_skinnable"
      android:gravity="center"
      android:orientation="vertical"
      android:padding="30dp">

    <ImageView
        android:id="@+id/image"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:scaleType="fitXY"
        android:src="@drawable/icon_app_skinnable"
        skin:provider="BasicAttributeSkinner" />

    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="Hello"
        android:textColor="@color/text_color_01_skinnable"
        android:textSize="16dp"
        skin:provider="BasicAttributeSkinner" />
</LinearLayout>

due to android technical limit
skinner only support three skinnable attribute by default
background, src, and textColor

you can create your own provider to introduce more customization
take a reference to BasicAttributeSkinner, that work is just simple

object CustomAttributeSkinner : BaseSkinnerProvider()
SkinnerProvidersFactory.registerViewProvider(CustomAttributeSkinner)

create an empty android application project
keep application id same with the origin one
if your skin have more than one mode, create a mode folder additionally
mode folder named as res-mode, corresponding resource named as xxx_skinnable_mode

plugins {
    id("com.android.application")
}

android {
    compileSdk = 34
    defaultConfig {
        namespace = "com.android.app"
        applicationId = "com.android.app"
        minSdk = 30
    }

    sourceSets {
        getByName("main").res.srcDirs("src/main/res-dark")
    }
}

just like build an android apk
run Build - Build APK, then you will get a skin apk in build/output directory
install it to your application spaces as mentioned above

for more detailed confusion, take a look at sample app
this is actually a simple and concise library, I believe you can do it

Good Job, Baby !