增加平板界面配置，更新主页面

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

@@ -7,11 +7,11 @@
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/view_pager_main"
-        android:layout_width="match_parent"
+        android:layout_width="0dp"
         android:layout_height="0dp"
         app:layout_constraintBottom_toTopOf="@id/bottom_navigation_view"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintStart_toEndOf="@id/navigation_rail_view"
         app:layout_constraintTop_toTopOf="parent"
         tools:ignore="SpeakableTextPresentCheck" />
 
@@ -20,9 +20,23 @@
         android:id="@+id/bottom_navigation_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:visibility="visible"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:menu="@menu/main_bnv" />
 
+    <com.google.android.material.navigationrail.NavigationRailView
+        android:id="@+id/navigation_rail_view"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:background="?attr/colorSurfaceContainer"
+        android:visibility="visible"
+        app:headerLayout="@layout/navigation_rail_fab"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:menu="@menu/main_bnv"
+        app:menuGravity="center" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>