优化

app/src/main/java/io/legado/app/lib/theme/ATH.kt

@@ -126,11 +126,9 @@ object ATH {
         activity: Activity,
         color: Int = ThemeStore.navigationBarColor(activity)
     ) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
         activity.window.navigationBarColor = color
         setLightNavigationBar(activity, ColorUtils.isColorLight(color))
     }
-    }
 
     fun setLightNavigationBar(activity: Activity, enabled: Boolean) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
@@ -170,9 +168,7 @@ object ATH {
     }
 
     fun setTaskDescriptionColor(activity: Activity, @ColorInt color: Int) {
-        val color1: Int
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            color1 = ColorUtils.stripAlpha(color)
+        val color1: Int = ColorUtils.stripAlpha(color)
         @Suppress("DEPRECATION")
         activity.setTaskDescription(
             ActivityManager.TaskDescription(
@@ -182,7 +178,6 @@ object ATH {
             )
         )
     }
-    }
 
     fun setTint(
         view: View,