优化

app/src/main/java/io/legado/app/ui/book/search/SearchActivity.kt

@@ -116,26 +116,36 @@ class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel
     override fun onMenuOpened(featureId: Int, menu: Menu): Boolean {
         menu.removeGroup(R.id.menu_group_1)
         menu.removeGroup(R.id.menu_group_2)
+        var hasChecked = false
         val searchScopeNames = viewModel.searchScope.displayNames
         if (viewModel.searchScope.isSource()) {
             menu.add(R.id.menu_group_1, Menu.NONE, Menu.NONE, searchScopeNames.first()).apply {
                 isChecked = true
+                hasChecked = true
             }
         }
-        menu.add(R.id.menu_group_2, R.id.menu_1, Menu.NONE, getString(R.string.all_source)).apply {
+        val allSourceMenu =
+            menu.add(R.id.menu_group_2, R.id.menu_1, Menu.NONE, getString(R.string.all_source))
+                .apply {
                     if (searchScopeNames.isEmpty()) {
                         isChecked = true
+                        hasChecked = true
                     }
                 }
         groups?.forEach {
             if (searchScopeNames.contains(it)) {
                 menu.add(R.id.menu_group_1, Menu.NONE, Menu.NONE, it).apply {
                     isChecked = true
+                    hasChecked = true
                 }
             } else {
                 menu.add(R.id.menu_group_2, Menu.NONE, Menu.NONE, it)
             }
         }
+        if (!hasChecked) {
+            viewModel.searchScope.update("")
+            allSourceMenu.isChecked = true
+        }
         menu.setGroupCheckable(R.id.menu_group_1, true, false)
         menu.setGroupCheckable(R.id.menu_group_2, true, true)
         return super.onMenuOpened(featureId, menu)