import'package:dropdown_search/dropdown_search.dart';import'package:flutter/material.dart';voidmain() {runApp(MyApp()); }classMyAppextendsStatelessWidget{@overrideWidgetbuild(BuildContextcontext) {returnMaterialApp( title:'Flutter Demo', theme:ThemeData(primarySwatch:Colors.blue), home:MyHomePage(title...
Flutter DropdownButton2 Intro Flutter's core Dropdown Button widget with steady dropdown menu and many other options you can customize to your needs. Features Options Installation Usage and Examples 1. Simple DropdownButton2 with no styling 2. DropdownButton2 with few styling and customization ...
新建一个 ExpandPopupMenuDivider 类 同样也去继承 PopupMenuEntry 类, 然后添加我们的颜色属性。 import'package:flutter/material.dart';constdouble_kMenuDividerHeight=16.0;classExpandPopupMenuDivider<T>extendsPopupMenuEntry<T>{/// Creates a horizontal divider for a popup menu./// By default, the divider...