feat: 优化代码

app/src/main/java/io/legado/app/constant/PreferKey.kt

@@ -42,4 +42,5 @@ object PreferKey {
     const val shareLayout = "shareLayout"
     const val readStyleSelect = "readStyleSelect"
     const val systemTypefaces = "system_typefaces"
+    const val readBodyToLh = "readBodyToLh"
 }

app/src/main/java/io/legado/app/help/AppConfig.kt

@@ -121,7 +121,7 @@ object AppConfig {
             App.INSTANCE.putPrefInt("elevation", value)
         }
 
-    val readBodyToLh: Boolean get() = App.INSTANCE.getPrefBoolean("readBodyToLh", true)
+    val readBodyToLh: Boolean get() = App.INSTANCE.getPrefBoolean(PreferKey.readBodyToLh, true)
 
     val isGooglePlay: Boolean get() = App.INSTANCE.channel == "google"
 }

app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt

@@ -94,6 +94,7 @@ class MoreConfigDialog : DialogFragment() {
             key: String?
         ) {
             when (key) {
+                PreferKey.readBodyToLh -> activity?.recreate()
                 PreferKey.hideStatusBar -> {
                     ReadBookConfig.hideStatusBar = getPrefBoolean(PreferKey.hideStatusBar)
                     postEvent(EventBus.UP_CONFIG, true)