优化

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

@@ -16,8 +16,9 @@
     <io.legado.app.lib.theme.view.ThemeBottomNavigationVIew
         android:id="@+id/bottom_navigation_view"
         android:layout_width="match_parent"
-        android:layout_height="50dp"
+        android:layout_height="wrap_content"
         android:background="@color/background"
+        android:minHeight="50dp"
         app:itemActiveIndicatorStyle="@color/transparent"
         app:labelVisibilityMode="unlabeled"
         app:menu="@menu/main_bnv" />