优化

app/src/main/java/io/legado/app/utils/ColorUtils.kt

@@ -1,16 +1,18 @@
 package io.legado.app.utils
 
 import android.graphics.Color
-
 import androidx.annotation.ColorInt
 import androidx.annotation.FloatRange
 import androidx.core.graphics.ColorUtils
-import java.util.*
 import kotlin.math.*
 
 @Suppress("unused", "MemberVisibilityCanBePrivate")
 object ColorUtils {
 
+    fun isColorLight(@ColorInt color: Int): Boolean {
+        return ColorUtils.calculateLuminance(color) >= 0.65
+    }
+
     fun intToString(intColor: Int): String {
         return String.format("#%06X", 0xFFFFFF and intColor)
     }
@@ -39,10 +41,6 @@ object ColorUtils {
         return shiftColor(color, 1.1f)
     }
 
-    fun isColorLight(@ColorInt color: Int): Boolean {
-        return ColorUtils.calculateLuminance(color) >= 0.65
-    }
-
     @ColorInt
     fun invertColor(@ColorInt color: Int): Int {
         val r = 255 - Color.red(color)
@@ -79,83 +77,6 @@ object ColorUtils {
         return Color.argb(a.toInt(), r.toInt(), g.toInt(), b.toInt())
     }
 
-    /**
-     * 按条件的到随机颜色
-     *
-     * @param alpha 透明
-     * @param lower 下边界
-     * @param upper 上边界
-     * @return 颜色值
-     */
-    fun getRandomColor(alpha: Int, lower: Int, upper: Int): Int {
-        return RandomColor(alpha, lower, upper).color
-    }
-
-    /**
-     * @return 获取随机色
-     */
-    fun getRandomColor(): Int {
-        return RandomColor(255, 80, 200).color
-    }
-
-
-    /**
-     * 随机颜色
-     */
-    class RandomColor(alpha: Int, lower: Int, upper: Int) {
-        private var alpha: Int = 0
-        private var lower: Int = 0
-        private var upper: Int = 0
-
-        //随机数是前闭  后开
-        val color: Int
-            get() {
-                val red = getLower() + Random().nextInt(getUpper() - getLower() + 1)
-                val green = getLower() + Random().nextInt(getUpper() - getLower() + 1)
-                val blue = getLower() + Random().nextInt(getUpper() - getLower() + 1)
-
-                return Color.argb(getAlpha(), red, green, blue)
-            }
-