优化

app/src/main/res/menu/import_book.xml

@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:ignore="AlwaysShowAction">
 
     <item
         android:id="@+id/menu_select_folder"
-        android:title="@string/select_folder"
         android:icon="@drawable/ic_folder_open"
-        app:showAsAction="ifRoom" />
+        android:title="@string/select_folder"
+        app:showAsAction="always" />
 
     <item
         android:id="@+id/menu_scan_folder"
@@ -18,4 +20,26 @@
         android:title="@string/import_file_name"
         app:showAsAction="never" />
 
+    <group android:id="@+id/menu_group_sort">
+
+        <item
+            android:id="@+id/menu_sort_name"
+            android:checkable="true"
+            android:title="@string/sort_by_name"
+            app:showAsAction="never" />
+
+        <item
+            android:id="@+id/menu_sort_size"
+            android:checkable="true"
+            android:title="@string/sort_by_size"
+            app:showAsAction="never" />
+
+        <item
+            android:id="@+id/menu_sort_time"
+            android:checkable="true"
+            android:title="@string/sort_by_time"
+            app:showAsAction="never" />
+
+    </group>
+
 </menu>

app/src/main/res/values-es-rES/strings.xml

@@ -945,5 +945,6 @@
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-ja-rJP/strings.xml

@@ -948,5 +948,6 @@
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-pt-rBR/strings.xml

@@ -948,5 +948,6 @@
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh-rHK/strings.xml

@@ -941,9 +941,10 @@
     <string name="edit_content">编辑内容</string>
     <string name="chapter_change_source">单章换源</string>
     <string name="book_change_source">整书换源</string>
-    <string name="sort_by_time">时间排序</string>
+    <string name="sort_by_time">按时间排序</string>
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh-rTW/strings.xml

@@ -947,5 +947,6 @@
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values-zh/strings.xml

@@ -947,5 +947,6 @@
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">大小排序</string>
     <!-- string end -->
 </resources>

app/src/main/res/values/strings.xml

@@ -944,9 +944,10 @@
     <string name="edit_content">Edit Content</string>
     <string name="chapter_change_source">单章换源</string>
     <string name="book_change_source">整书换源</string>
-    <string name="sort_by_time">时间排序</string>
+    <string name="sort_by_time">Sort by time</string>
     <string name="enable_record">开启记录</string>
     <string name="copy_all">拷贝所有</string>
     <string name="auto_complete">自动补全</string>
+    <string name="sort_by_size">Sort by size</string>
     <!-- string end -->
 </resources>