Flutter常用知识点

启动：flutter run --no-sound-null-safety
打包：flutter build apk --no-sound-null-safety

生成页面：
import ‘package:flutter/material.dart’;
statefulw快捷键

头部：
appBar: new AppBar(
backgroundColor: const Color(0xFF1F2025),
centerTitle: true,
title: new Text(‘购买’),
),
backgroundColor: Color.fromRGBO(31, 32, 37, 1),

占位高度：
SizedBox(height: 12),

横线：
Divider( height: 1.0,color: Color(0xFF535458), ),

Container内容居中：
alignment: Alignment.center,

Container内外间距：
padding: EdgeInsets.only( top: 20),

Container圆角和颜色：
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(15)),
color: Color.fromRGBO(42, 43, 48, 1),
),

Row两端对齐：
mainAxisAlignment: MainAxisAlignment.spaceBetween,

Column靠左对齐：
crossAxisAlignment: CrossAxisAlignment.start，

Text文本样式：
Text( “合计”, style: const TextStyle( fontSize: 12.0, color: Color(0xFFC5C5C6)), ),