flutter3-douyin：基于flutter3.x+getx+mediaKit短视频直播App应用
经过大半个月的爆肝式开发输出，又一个跨端新项目Flutter-Douyin短视频正式完结了。
flutter3_douyin基于最新跨平台技术flutter3.19.2开发手机端仿抖音app实战项目。
实现了类似抖音全屏沉浸式上下滑动视频、左右滑动切换页面模块，直播间进场/礼物动画，聊天等模块功能。
使用技术
- 编辑器：vscode
- 技术框架：flutter3.19.2+dart3.3.0
- 路由/状态插件：get: ^4.6.6
- 本地缓存服务：get_storage: ^2.1.1
- 图片预览插件：photo_view: ^0.14.0
- 刷新加载：easy_refresh^3.3.4
- toast轻提示：toast^0.3.0
- 视频套件：media_kit: ^1.1.10+1
项目结构
前期需要配置好flutter和dart sdk环境。如果使用vscode编辑器，可以安装一些flutter语法插件。
更多的开发api资料，大家可以去官网查阅就行。
flutter.dev/
flutter.cn/
pub.flutter-io.cn/
http://www.dartcn.com/
该项目涉及到的技术知识还是蛮多的。下面主要介绍一些短视频及直播知识，至于其它知识点，大家可以去看看之前分享的flutter3聊天项目文章。
http://www.cnblogs.com/xiaoyan2017…
http://www.cnblogs.com/xiaoyan2017…
flutter主入口lib/main.dart
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:media_kit/media_kit.dart';
import 'utils/index.dart';
// 引入布局模板
import 'layouts/index.dart';
import 'binding/binding.dart';
// 引入路由管理
import 'router/index.dart';
void main() async {
// 初始化get_storage
await GetStorage.init();
// 初始化media_kit
WidgetsFlutterBinding.ensureInitialized();
MediaKit.ensureInitialized();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return GetMaterialApp(
title: 'FLUTTER3 DYLIVE',
debugShowCheckedModeBanner: false,
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: const Color(0xFFFE2C55)),
useMaterial3: true,
// 修正windows端字体粗细不一致
fontFamily: Platform.isWindows ? 'Microsoft YaHei' : null,
),
home: const Layout(),
// 全局绑定GetXController
initialBinding: GlobalBindingController(),
// 初始路由
initialRoute: Utils.isLogin() ? '/' : '/login',
// 路由页面
getPages: routePages,
// 错误路由
// unknownRoute: GetPage(name: '/404', page: Error),
);
}
}
flutter3自定义底部凸起导航
采用 bottomNavigationBar 组件实现页面模块切换。通过getx状态管理联动控制底部导航栏背景颜色。导航栏中间图标/图片按钮，使用了 Positioned 组件实现功能。
return Scaffold(
backgroundColor: Colors.grey[50],
body: pageList[pageCurrent],
// 底部导航栏
bottomNavigationBar: Theme(
// Flutter去掉BottomNavigationBar底部导航栏的水波纹
data: ThemeData(
splashColor: Colors.transparent,
highlightColor: Colors.transparent,
hoverColor: Colors.transparent,
),
child: Obx(() {
return Stack(
children: [
Container(
decoration: const BoxDecoration(
border: Border(top: BorderSide(color: Colors.black54, width: .1)),
),
child: BottomNavigationBar(
backgroundColor: bottomNavigationBgcolor(),
fixedColor: FStyle.primaryColor,
unselectedItemColor: bottomNavigationItemcolor(),
type: BottomNavigationBarType.fixed,
elevation: 1.0,
unselectedFontSize: 12.0,
selectedFontSize: 12.0,
currentIndex: pageCurrent,
items: [
...pageItems
],
onTap: (index) {
setState(() {
pageCurrent = index;
});
},
),
),
// 自定义底部导航栏中间按钮
Positioned(
left: MediaQuery.of(context).size.width / 2 - 15,
top: 0,
bottom: 0,
child: InkWell(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// Icon(Icons.tiktok, color: bottomNavigationItemcolor(centerDocked: true), size: 32.0,),
Image.asset('assets/images/applogo.png', width: 32.0, fit: BoxFit.contain,)
// Text('直播', style: TextStyle(color: bottomNavigationItemcolor(centerDocked: true), fontSize: 12.0),)
],
),
onTap: () {
setState(() {
pageCurrent = 2;
});
},
),
),
],
);
}),
),
);
flutter3实现抖音滑动效果
return Scaffold(
extendBodyBehindAppBar: true,
appBar: AppBar(
forceMaterialTransparency: true,
backgroundColor: [1, 2, 3].contains(pageVideoController.pageVideoTabIndex.value) ? null : Colors.transparent,
foregroundColor: [1, 2, 3].contains(pageVideoController.pageVideoTabIndex.value) ? Colors.black : Colors.white,
titleSpacing: 1.0,
leading: Obx(() => IconButton(icon: Icon(Icons.menu, color: tabColor(),), onPressed: () {},),),
title: Obx(() {
return TabBar(
controller: tabController,
tabs: pageTabs.map((v) => Tab(text: v)).toList(),
isScrollable: true,
tabAlignment: TabAlignment.center,
overlayColor: MaterialStateProperty.all(Colors.transparent),
unselectedLabelColor: unselectedTabColor(),
labelColor: tabColor(),
indicatorColor: tabColor(),
indicatorSize: TabBarIndicatorSize.label,
unselectedLabelStyle: const TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei'),
labelStyle: const TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei', fontWeight: FontWeight.w600),
dividerHeight: 0,
labelPadding: const EdgeInsets.symmetric(horizontal: 10.0),
indicatorPadding: const EdgeInsets.symmetric(horizontal: 5.0),
onTap: (index) {
pageVideoController.updatePageVideoTabIndex(index); // 更新索引
pageController.jumpToPage(index);
},
);
}),
actions: [
Obx(() => IconButton(icon: Icon(Icons.search, color: tabColor(),), onPressed: () {},),),
],
),
body: Column(
children: [
Expanded(
child: Stack(
children: [
/// 水平滚动模块
PageView(
// 自定义滚动行为(支持桌面端滑动、去掉滚动条槽)
scrollBehavior: PageScrollBehavior().copyWith(scrollbars: false),
scrollDirection: Axis.horizontal,
controller: pageController,
onPageChanged: (index) {
pageVideoController.updatePageVideoTabIndex(index); // 更新索引
setState(() {
tabController.animateTo(index);
});
},
children: [
...pageModules
],
),
],
),
),
],
),
);
flutter实现直播功能
// 商品购买动效
Container(
...
),
// 加入直播间动效
const AnimationLiveJoin(
joinQueryList: [
{'avatar': 'assets/images/logo.png', 'name': 'andy'},
{'avatar': 'assets/images/logo.png', 'name': 'jack'},
{'avatar': 'assets/images/logo.png', 'name': '一条咸鱼'},
{'avatar': 'assets/images/logo.png', 'name': '四季平安'},
{'avatar': 'assets/images/logo.png', 'name': '叶子'},
],
),
// 送礼物动效
const AnimationLiveGift(
giftQueryList: [
{'label': '小心心', 'gift': 'assets/images/gift/gift1.png', 'user': 'Jack', 'avatar': 'assets/images/avatar/uimg2.jpg', 'num': 12},
{'label': '棒棒糖', 'gift': 'assets/images/gift/gift2.png', 'user': 'Andy', 'avatar': 'assets/images/avatar/uimg6.jpg', 'num': 36},
{'label': '大啤酒', 'gift': 'assets/images/gift/gift3.png', 'user': '一条咸鱼', 'avatar': 'assets/images/avatar/uimg1.jpg', 'num': 162},
{'label': '人气票', 'gift': 'assets/images/gift/gift4.png', 'user': 'Flower', 'avatar': 'assets/images/avatar/uimg5.jpg', 'num': 57},
{'label': '鲜花', 'gift': 'assets/images/gift/gift5.png', 'user': '四季平安', 'avatar': 'assets/images/avatar/uimg3.jpg', 'num': 6},
{'label': '捏捏小脸', 'gift': 'assets/images/gift/gift6.png', 'user': 'Alice', 'avatar': 'assets/images/avatar/uimg4.jpg', 'num': 28},
{'label': '你真好看', 'gift': 'assets/images/gift/gift7.png', 'user': '叶子', 'avatar': 'assets/images/avatar/uimg7.jpg', 'num': 95},
{'label': '亲吻', 'gift': 'assets/images/gift/gift8.png', 'user': 'YOYO', 'avatar': 'assets/images/avatar/uimg8.jpg', 'num': 11},
{'label': '玫瑰', 'gift': 'assets/images/gift/gift12.png', 'user': '宇辉', 'avatar': 'assets/images/avatar/uimg9.jpg', 'num': 3},
{'label': '私人飞机', 'gift': 'assets/images/gift/gift16.png', 'user': 'Hison', 'avatar': 'assets/images/avatar/uimg10.jpg', 'num': 273},
],
),
// 直播弹幕+商品讲解
Container(
margin: const EdgeInsets.only(top: 7.0),
height: 200.0,
child: Row(
crossAxisAlignment: CrossAxisAlignment.end,
children: [
Expanded(
child: ListView.builder(
padding: EdgeInsets.zero,
itemCount: liveJson[index]['message']?.length,
itemBuilder: (context, i) => danmuList(liveJson[index]['message'])[i],
),
),
SizedBox(
width: isVisibleGoodsTalk ? 7 : 35,
),
// 商品讲解
Visibility(
visible: isVisibleGoodsTalk,
child: Column(
...
),
),
],
),
),
// 底部工具栏
Container(
margin: const EdgeInsets.only(top: 7.0),
child: Row(
...
),
),
flutter直播通过 SlideTransition 组件实现直播进场动画。
return SlideTransition(
position: animationFirst ? animation : animationMix,
child: Container(
alignment: Alignment.centerLeft,
margin: const EdgeInsets.only(top: 7.0),
padding: const EdgeInsets.symmetric(horizontal: 7.0,),
height: 23.0,
width: 250,
decoration: const BoxDecoration(
gradient: LinearGradient(
begin: Alignment.centerLeft,
end: Alignment.centerRight,
colors: [
Color(0xFF6301FF), Colors.transparent
],
),
borderRadius: BorderRadius.horizontal(left: Radius.circular(10.0)),
),
child: joinList!.isNotEmpty ?
Text('欢迎 ${joinList![0]['name']} 加入直播间', style: const TextStyle(color: Colors.white, fontSize: 14.0,),)
:
Container()
,
),
);
class _AnimationLiveJoinState extends State<AnimationLiveJoin> with TickerProviderStateMixin {
// 动画控制器
late AnimationController controller = AnimationController(
vsync: this,
duration: const Duration(milliseconds: 500), // 第一个动画持续时间
);
late AnimationController controllerMix = AnimationController(
vsync: this,
duration: const Duration(milliseconds: 1000), // 第二个动画持续时间
);
// 动画
late Animation<Offset> animation = Tween(begin: const Offset(2.5, 0), end: const Offset(0, 0)).animate(controller);
late Animation<Offset> animationMix = Tween(begin: const Offset(0, 0), end: const Offset(-2.5, 0)).animate(controllerMix);
Timer? timer;
// 是否第一个动画
bool animationFirst = true;
// 是否空闲
bool idle = true;
// 加入直播间数据列表
List? joinList;
@override
void initState() {
super.initState();
joinList = widget.joinQueryList!.toList();
runAnimation();
animation.addListener(() {
if(animation.status == AnimationStatus.forward) {
debugPrint('第一个动画进行中');
idle = false;
setState(() {});
}else if(animation.status == AnimationStatus.completed) {
debugPrint('第一个动画结束');
animationFirst = false;
if(controllerMix.isCompleted || controllerMix.isDismissed) {
timer = Timer(const Duration(seconds: 2), () {
controllerMix.forward();
debugPrint('第二个动画开始');
});
}
setState(() {});
}
});
animationMix.addListener(() {
if(animationMix.status == AnimationStatus.forward) {
setState(() {});
}else if(animationMix.status == AnimationStatus.completed) {
animationFirst = true;
controller.reset();
controllerMix.reset();
if(joinList!.isNotEmpty) {
joinList!.removeAt(0);
}
idle = true;
// 执行下一个数据
runAnimation();
setState(() {});
}
});
}
void runAnimation() {
if(joinList!.isNotEmpty) {
// 空闲状态才能执行，防止添加数据播放状态混淆
if(idle == true) {
if(controller.isCompleted || controller.isDismissed) {
setState(() {});
timer = Timer(Duration.zero, () {
controller.forward();
});
}
}
}
}
@override
void dispose() {
controller.dispose();
controllerMix.dispose();
timer?.cancel();
super.dispose();
}
}
以上只是介绍了一部分知识点，限于篇幅就先介绍这么多，希望有所帮助~
juejin.cn/post/731918…
作者：xiaoyan2015
来源：juejin.cn/post/7349542148733960211
来源：juejin.cn/post/7349542148733960211
