优化

app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt

@@ -95,16 +95,6 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
             R.id.menu_log -> {
                 TextListDialog.show(supportFragmentManager, getString(R.string.log), CacheBook.logs)
             }
-            R.id.menu_no_group -> {
-                title_bar.subtitle = getString(R.string.no_group)
-                groupId = AppConst.bookGroupNoneId
-                initBookData()
-            }
-            R.id.menu_all -> {
-                title_bar.subtitle = item.title
-                groupId = AppConst.bookGroupAllId
-                initBookData()
-            }
             else -> if (item.groupId == R.id.menu_group) {
                 title_bar.subtitle = item.title
                 groupId = App.db.bookGroupDao().getByName(item.title.toString())?.groupId ?: 0
@@ -124,6 +114,8 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
         booksLiveData?.removeObservers(this)
         booksLiveData = when (groupId) {
             AppConst.bookGroupAllId -> App.db.bookDao().observeAll()
+            AppConst.bookGroupLocalId -> App.db.bookDao().observeLocal()
+            AppConst.bookGroupAudioId -> App.db.bookDao().observeAudio()
             AppConst.bookGroupNoneId -> App.db.bookDao().observeNoGroup()
             else -> App.db.bookDao().observeByGroup(groupId)
         }

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

@@ -14,21 +14,7 @@
         android:id="@+id/menu_book_group"
         android:title="@string/group"
         android:icon="@drawable/ic_groups"
-        app:showAsAction="always">
-
-        <menu>
-
-            <item
-                android:id="@+id/menu_no_group"
-                android:title="@string/no_group" />
-
-            <item
-                android:id="@+id/menu_all"
-                android:title="@string/all" />
-
-        </menu>
-
-    </item>
+        app:showAsAction="always" />
 
     <item
         android:id="@+id/menu_log"