优化

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

@@ -504,12 +504,12 @@ class ReadBookActivity : BaseReadBookActivity(),
         val isDown = action == 0
 
         if (keyCode == KeyEvent.KEYCODE_MENU) {
-            if (isDown && !binding.readMenu.cnaShowMenu) {
+            if (isDown && !binding.readMenu.canShowMenu) {
                 binding.readMenu.runMenuIn()
                 return true
             }
-            if (!isDown && !binding.readMenu.cnaShowMenu) {
-                binding.readMenu.cnaShowMenu = true
+            if (!isDown && !binding.readMenu.canShowMenu) {
+                binding.readMenu.canShowMenu = true
                 return true
             }
         }

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

@@ -42,7 +42,7 @@ class ReadMenu @JvmOverloads constructor(
     context: Context,
     attrs: AttributeSet? = null
 ) : FrameLayout(context, attrs) {
-    var cnaShowMenu: Boolean = false
+    var canShowMenu: Boolean = false
     private val callBack: CallBack get() = activity as CallBack
     private val binding = ViewReadMenuBinding.inflate(LayoutInflater.from(context), this, true)
     private var confirmSkipToChapter: Boolean = false
@@ -140,7 +140,7 @@ class ReadMenu @JvmOverloads constructor(
             this@ReadMenu.invisible()
             binding.titleBar.invisible()
             binding.bottomMenu.invisible()
-            cnaShowMenu = false
+            canShowMenu = false
             onMenuOutEnd?.invoke()
             callBack.upSystemUiVisibility()
         }