package com.example.kotlindemo.utils
import android.content.Context
import android.content.res.Configuration
import androidx.appcompat.app.AppCompatDelegate
import androidx.core.content.edit
/**
 * author: chen
 * data: 2021/10/11
 * des: 深色主題工具類
 */
object DarkThemeUtil {
    private const val DATA_NAME = "DayNight" // 存儲深色模式狀態的文件名，自行更改
    /**
     * 判斷是否開啟了深色模式
     */
    fun isDarkTheme(context: Context): Boolean {
        val flag = context.resources.configuration.uiMode and
                Configuration.UI_MODE_NIGHT_MASK
        return flag == Configuration.UI_MODE_NIGHT_YES
    }
    /**
     * 跟隨系統設置打開關閉深色主題
     */
    fun DefaultTheme() {
        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
    }
    /**
     * 打開深色模式
     */
    fun openDarkTheme() {
        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
    }
    /**
     * 關閉深色模式
     */
    fun closeDarkTheme() {
        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)
    }
    /**
     * 寫入內存數據
     * 將當前的深色模式狀態保持到內存，下次啟動 APP 以讀取
     * @param context Context
     * @param state 深色模式狀態，true 打開狀態，false 關閉狀態
     */
    fun writeDarkThemeState(context: Context, state: Boolean) {
        context.getSharedPreferences(DATA_NAME, Context.MODE_PRIVATE)
            .edit{ putBoolean("boolean_dark_theme_state", state) }
    }
    /**
     * 讀取內存數據
     */
    fun readDarkThemeState(context: Context): Boolean {
        return context.getSharedPreferences(DATA_NAME, Context.MODE_PRIVATE)
            .getBoolean("boolean_dark_theme_state", false)
    }
}

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#008577</color>
    <color name="colorPrimaryDark">#00574B</color>
    <color name="colorAccent">#D81B60</color>
    <color name="color_000000">#000000</color>
    <color name="color_ffffff">#ffffff</color>
    <color name="color_008adb">#008adb</color>
    <color name="light_blue_600">#FF039BE5</color>
    <color name="light_blue_900">#FF01579B</color>
    <color name="light_blue_A200">#FF40C4FF</color>
    <color name="light_blue_A400">#FF00B0FF</color>
    <color name="black_overlay">#66000000</color>
    <color name="background_color">#ffffff</color>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#111111</color>
    <color name="colorPrimaryDark">#00574B</color>
    <color name="colorAccent">#D81B60</color>
    <color name="color_000000">#000000</color>
    <color name="color_ffffff">#ffffff</color>
    <color name="color_008adb">#008adb</color>
    <color name="light_blue_600">#FF039BE5</color>
    <color name="light_blue_900">#FF01579B</color>
    <color name="light_blue_A200">#FF40C4FF</color>
    <color name="light_blue_A400">#FF00B0FF</color>
    <color name="black_overlay">#66000000</color>
    <color name="background_color">#111111</color>
</resources>

Paint paint = new Paint();
ColorMatrix colorMatrix= new ColorMatrix();
colorMatrix.setSaturation(0);
paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix));
getWindow().getDecorView().setLayerType(View.LAYER_TYPE_HARDWARE, paint);

val paint = Paint()
val colorMatrix = ColorMatrix()
colorMatrix.setSaturation(0F)
paint.setColorFilter(ColorMatrixColorFilter(colorMatrix))
window.decorView.setLayerType(View.LAYER_TYPE_HARDWARE,paint)