小编Ash*_*mar的帖子

我正在尝试更改应用栏的颜色，但我没有选择更改它的选项。当我在观看教程视频时，他们没有显示可以编辑颜色。请帮忙！

import 'package:flutter/material.dart';



class SearchList extends StatefulWidget {
  SearchList({ Key key }) : super(key: key);
  @override
  SearchListState createState() => new SearchListState();

}

class SearchListState extends State<SearchList>
{

  Widget appBarTitle = new Text("Search Product..", style: new TextStyle(color: Colors.white),);
  Icon actionIcon = new Icon(Icons.search, color: Colors.white);
  final key = new GlobalKey<ScaffoldState>();
  final TextEditingController searchQuery = new TextEditingController();
  List<String> _list;
  bool issearching;
  String _searchText = "";

  SearchListState() {
    searchQuery.addListener(() {
      if (searchQuery.text.isEmpty) {
        setState(() {
          issearching = false;
          _searchText = "";
        });
      } …