优化

app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt

@@ -19,6 +19,7 @@ import io.legado.app.ui.book.read.page.entities.TextPage
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import io.legado.app.ui.widget.BatteryView
 import io.legado.app.utils.*
+import splitties.views.backgroundColor
 import java.util.*
 
 /**
@@ -185,6 +186,7 @@ class PageView(context: Context) : FrameLayout(context) {
     }
 
     fun setBg(bg: Drawable?) {
+        binding.vwRoot.backgroundColor = ReadBookConfig.bgMeanColor
         binding.vwBg.background = bg
         upBgAlpha()
     }

app/src/main/res/layout/dialog_read_bg_text.xml

@@ -153,7 +153,6 @@
         android:id="@+id/sb_bg_alpha"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:min="10"
         android:max="100"
         android:padding="6dp"
         tools:ignore="UnusedAttribute" />

app/src/main/res/layout/view_book_page.xml

@@ -3,6 +3,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/vw_root"
     android:background="@color/background"
     android:layout_width="match_parent"
     android:layout_height="match_parent"