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)
-            }
-
-        init {
-            require(upper > lower) { "must be lower < upper" }
-            setAlpha(alpha)
-            setLower(lower)
-            setUpper(upper)
-        }
-
-        private fun getAlpha(): Int {
-            return alpha
-        }
-
-        private fun setAlpha(alpha: Int) {
-            var alpha1 = alpha
-            if (alpha1 > 255) alpha1 = 255
-            if (alpha1 < 0) alpha1 = 0
-            this.alpha = alpha1
-        }
-
-        private fun getLower(): Int {
-            return lower
-        }
-
-        private fun setLower(lower: Int) {
-            var lower1 = lower
-            if (lower1 < 0) lower1 = 0
-            this.lower = lower1
-        }
-
-        private fun getUpper(): Int {
-            return upper
-        }
-
-        private fun setUpper(upper: Int) {
-            var upper1 = upper
-            if (upper1 > 255) upper1 = 255
-            this.upper = upper1
-        }
-    }
-
     fun argb(R: Int, G: Int, B: Int): Int {
         return argb(Byte.MAX_VALUE.toInt(), R, G, B)
     }

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

@@ -0,0 +1,61 @@
+package io.legado.app.utils
+
+import android.graphics.Color
+import java.util.*
+
+@Suppress("unused")
+class RandomColor(alpha: Int, lower: Int, upper: Int) {
+
+    constructor() : this(255, 80, 200)
+
+    private var alpha: Int = 0
+    private var lower: Int = 0
+    private var upper: Int = 0
+
+    init {
+        require(upper > lower) { "must be lower < upper" }
+        setAlpha(alpha)
+        setLower(lower)
+        setUpper(upper)
+    }
+
+    //随机数是前闭  后开
+    fun build(): Int {
+        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)
+    }
+
+    private fun getAlpha(): Int {
+        return alpha
+    }
+
+    private fun setAlpha(alpha: Int) {
+        var alpha1 = alpha
+        if (alpha1 > 255) alpha1 = 255
+        if (alpha1 < 0) alpha1 = 0
+        this.alpha = alpha1
+    }
+
+    private fun getLower(): Int {
+        return lower
+    }
+
+    private fun setLower(lower: Int) {
+        var lower1 = lower
+        if (lower1 < 0) lower1 = 0
+        this.lower = lower1
+    }
+
+    private fun getUpper(): Int {
+        return upper
+    }
+
+    private fun setUpper(upper: Int) {
+        var upper1 = upper
+        if (upper1 > 255) upper1 = 255
+        this.upper = upper1
+    }
+
+}