搜索进行时，随menuItem点击刷新

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

@@ -76,6 +76,9 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
                     !getPrefBoolean(PreferKey.precisionSearch)
                 )
                 precisionSearchMenuItem?.isChecked = getPrefBoolean(PreferKey.precisionSearch)
+                search_view.query.toString().trim()?.let {
+                    search_view.setQuery(it, true)
+                }
             }
             R.id.menu_source_manage -> startActivity<BookSourceActivity>()
             else -> if (item.groupId == R.id.source_group) {
@@ -85,6 +88,9 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
                 } else {
                     putPrefString("searchGroup", item.title.toString())
                 }
+                search_view.query.toString().trim()?.let {
+                    search_view.setQuery(it, true)
+                }
             }
         }
         return super.onCompatOptionsItemSelected(item)