flutter3-dylive仿抖音App例項|Flutter3+Getx實戰短影片直播應用

原創研發flutter3+getX+mediaKit仿抖音app短影片直播實戰Flutter-DouYin。

flutter3_dylive使用最新跨平臺技術flutter3.x+dart3+getx+get_storage+media_kit開發手機端仿抖音app小影片直播實戰專案。實現了抖音全屏式上下滑動影片、左右滑動切換頁面模組，直播間進場/禮物動畫，聊天等模組。

技術棧

• 編輯器：Vscode
• 技術框架：Flutter3.19.2+Dart3.3.0
• 路由/狀態管理：get: ^4.6.6
• 本地快取：get_storage: ^2.1.1
• 圖片預覽外掛：photo_view: ^0.14.0
• 重新整理載入：easy_refresh^3.3.4
• toast輕提示：toast^0.3.0
• 影片套件：media_kit: ^1.1.10+1

flutter_douyin實現了類似抖音全屏沉浸式滑動效果(上下滑動影片、左右切換頁面模組)。

如下圖：實現了左右滑動的同時，頂部狀態列+Tab選單+底部bottomNavigationBar導航欄三者聯動效果。

專案結構目錄

在專案建立前期，需要配置好Flutter SDK和Dart SDK開發環境。

https://flutter.dev/

https://www.dartcn.com/

https://pub.flutter-io.cn/

如果是使用Vscode編輯器開發flutter專案，大家需自行配置flutter/dart擴充套件語法外掛。

專案中的一些技術知識點，有些是在之前的專案flutter3聊天例項中有介紹過，感興趣的話可以去看看。

https://www.cnblogs.com/xiaoyan2017/p/18008370

https://www.cnblogs.com/xiaoyan2017/p/18048244

Flutter入口配置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';

// 引入佈局模板
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端字型粗細不一致
        fontFamily: Platform.isWindows ? 'Microsoft YaHei' : null,
      ),
      home: const Layout(),
      // 全域性繫結GetXController
      initialBinding: GlobalBindingController(),
      // 初始路由
      initialRoute: Utils.isLogin() ? '/' : '/login',
      // 路由頁面
      getPages: routePages,
      // 錯誤路由
      // unknownRoute: GetPage(name: '/404', page: Error),
    );
  }
}

Flutter3底部導航欄

底部導航欄使用 bottomNavigationBar 元件實現頁面模組切換。透過getx全域性狀態來聯動控制底部導航欄背景顏色。

導航欄中間圖示/圖片按鈕，使用了 Positioned 元件定位實現功能。

return Scaffold(
  backgroundColor: Colors.grey[50],
  body: pageList[pageCurrent],
  // 底部導航欄
  bottomNavigationBar: Theme(
    // Flutter去掉BottomNavigationBar底部導航欄的水波紋
    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;
                });
              },
            ),
          ),
          // 自定義底部導航欄中間按鈕
          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;
                });
              },
            ),
          ),
        ],
      );
    }),
  ),
);

import 'package:flutter/material.dart';
import 'package:get/get.dart';

import '../styles/index.dart';
import '../../controllers/page_video_controller.dart';

// 引入pages頁面
import '../pages/index/index.dart';
import '../pages/video/index.dart';
import '../pages/live/index.dart';
import '../pages/message/index.dart';
import '../pages/my/index.dart';

class Layout extends StatefulWidget {
  const Layout({super.key});

  @override
  State<Layout> createState() => _LayoutState();
}

class _LayoutState extends State<Layout> {
  PageVideoController pageVideoController = Get.put(PageVideoController());

  // page索引
  int pageCurrent = 0;
  // page頁面
  List pageList = [const Index(), const FVideo(), const FLiveList(), const Message(), const My()];
  // tabs選項
  List pageItems = [
    const BottomNavigationBarItem(
      icon: Icon(Icons.home_outlined),
      label: '首頁'
    ),
    const BottomNavigationBarItem(
      icon: Icon(Icons.play_arrow_outlined),
      label: '短影片'
    ),
    const BottomNavigationBarItem(
      icon: Icon(Icons.live_tv_rounded, color: Colors.transparent,),
      label: ''
    ),
    BottomNavigationBarItem(
      icon: Stack(
        alignment: const Alignment(4, -2),
        children: [
          const Icon(Icons.messenger_outline),
          FStyle.badge(1)
        ],
      ),
      label: '訊息'
    ),
    BottomNavigationBarItem(
      icon: Stack(
        alignment: const Alignment(1.5, -1),
        children: [
          const Icon(Icons.person_outline),
          FStyle.badge(0, isdot: true)
        ],
      ),
      label: '我'
    )
  ];

  // 底部導航欄背景色
  Color bottomNavigationBgcolor() {
    int index = pageCurrent;
    int pageVideoTabIndex = pageVideoController.pageVideoTabIndex.value;
    Color color = Colors.white;
    if(index == 1) {
      if([1, 2, 3].contains(pageVideoTabIndex)) {
        color = Colors.white;
      }else {
        color = Colors.black;
      }
    }
    return color;
  }
  // 底部導航欄顏色
  Color bottomNavigationItemcolor({centerDocked = false}) {
    int index = pageCurrent;
    int pageVideoTabIndex = pageVideoController.pageVideoTabIndex.value;
    Color color = Colors.black54;
    if(index == 1) {
      if([1, 2, 3].contains(pageVideoTabIndex)) {
        color = Colors.black54;
      }else {
        color = Colors.white60;
      }
    }else if(index == 2 && centerDocked) {
      color = FStyle.primaryColor;
    }
    return color;
  }

  // ...
}

Flutter實現抖音全屏式滑動

如下圖：實現類似抖音左右滑動全屏切換頁面模組、上下滑動絲滑切換短影片。

採用 TabBar 和 PageView 聯動頁面滑動。

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: [
            /// 水平滾動模組
            PageView(
              // 自定義滾動行為(支援桌面端滑動、去掉捲軸槽)
              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
              ],
            ),
          ],
        ),
      ),
    ],
  ),
);

PageVideoController pageVideoController = Get.put(PageVideoController());

List<String> pageTabs = ['熱點', '長影片', '文旅', '商城', '關注', '同城服務', '推薦'];
final pageModules = [
  const HotModule(),
  const LongVideoModule(),
  const TripModule(),
  const MallModule(),
  const FavorModule(),
  const NearModule(),
  const RecommendModule()
];
late final TabController tabController = TabController(initialIndex: pageVideoController.pageVideoTabIndex.value, length: pageTabs.length, vsync: this);
// 頁面controller
late final PageController pageController = PageController(initialPage: pageVideoController.pageVideoTabIndex.value, viewportFraction: 1.0);

@override
void dispose() {
  tabController.dispose();
  pageController.dispose();
  super.dispose();
}

flutter短影片mini進度條

底部mini播放進度條一開始是採用自定義元件實現效果，不過不能拖動捲軸進度，後來就採用了Slider元件來實現。

// flutter滑動短影片模組  Q：282310962

return Container(
  color: Colors.black,
  child: Column(
    children: [
      Expanded(
        child: Stack(
          children: [
            /// 垂直滾動模組
            PageView.builder(
              // 自定義滾動行為(支援桌面端滑動、去掉捲軸槽)
              scrollBehavior: PageScrollBehavior().copyWith(scrollbars: false),
              scrollDirection: Axis.vertical,
              controller: pageController,
              onPageChanged: (index) async {
                ...
              },
              itemCount: videoList.length,
              itemBuilder: (context, index) {
                return Stack(
                  children: [
                    // 影片區域
                    Positioned(
                      top: 0,
                      left: 0,
                      right: 0,
                      bottom: 0,
                      child: GestureDetector(
                        child: Stack(
                          children: [
                            // 短影片外掛
                            Visibility(
                              visible: videoIndex == index,
                              child: Video(
                                controller: videoController,
                                fit: BoxFit.cover,
                                // 無控制條
                                controls: NoVideoControls,
                              ),
                            ),
                            // 播放/暫停按鈕
                            StreamBuilder(
                              stream: player.stream.playing,
                              builder: (context, playing) {
                                return Visibility(
                                  visible: playing.data == false,
                                  child: Center(
                                    child: IconButton(
                                      padding: EdgeInsets.zero,
                                      onPressed: () {
                                        player.playOrPause();
                                      },
                                      icon: Icon(
                                        playing.data == true ? Icons.pause : Icons.play_arrow_rounded,
                                        color: Colors.white70,
                                        size: 70,
                                      ),
                                    ),
                                  ),
                                );
                              },
                            ),
                          ],
                        ),
                        onTap: () {
                          player.playOrPause();
                        },
                      ),
                    ),
                    // 右側操作欄
                    Positioned(
                      bottom: 15.0,
                      right: 10.0,
                      child: Column(
                        ...
                      ),
                    ),
                    // 底部資訊區域
                    Positioned(
                      bottom: 15.0,
                      left: 10.0,
                      right: 80.0,
                      child: Column(
                        ...
                      ),
                    ),
                    // 播放mini進度條
                    Positioned(
                      bottom: 0.0,
                      left: 10.0,
                      right: 10.0,
                      child: Visibility(
                        visible: videoIndex == index && position > Duration.zero,
                        child: Listener(
                          child: SliderTheme(
                            data: const SliderThemeData(
                              trackHeight: 2.0,
                              thumbShape: RoundSliderThumbShape(enabledThumbRadius: 4.0), // 調整滑塊的大小
                              // trackShape: RectangularSliderTrackShape(), // 使用矩形軌道形狀
                              overlayShape: RoundSliderOverlayShape(overlayRadius: 0), // 去掉Slider預設上下邊距間隙
                              inactiveTrackColor: Colors.white24, // 設定非活動進度條的顏色
                              activeTrackColor: Colors.white, // 設定活動進度條的顏色
                              thumbColor: Colors.pinkAccent, // 設定滑塊的顏色
                              overlayColor: Colors.transparent, // 設定滑塊覆蓋層的顏色
                            ),
                            child: Slider(
                              value: sliderValue,
                              onChanged: (value) async {
                                // debugPrint('當前影片播放時間$value');
                                setState(() {
                                  sliderValue = value;
                                });
                                // 跳轉播放時間
                                await player.seek(duration * value.clamp(0.0, 1.0));
                              },
                              onChangeEnd: (value) async {
                                setState(() {
                                  sliderDraging = false;
                                });
                                // 繼續播放
                                if(!player.state.playing) {
                                  await player.play();
                                }
                              },
                            ),
                          ),
                          onPointerMove: (e) {
                            setState(() {
                              sliderDraging = true;
                            });
                          },
                        ),
                      ),
                    ),
                    // 影片播放時間
                    Positioned(
                      bottom: 90.0,
                      left: 10.0,
                      right: 10.0,
                      child: Visibility(
                        visible: sliderDraging,
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            Text(position.label(reference: duration), style: const TextStyle(color: Colors.white, fontSize: 16.0, fontWeight: FontWeight.w600),),
                            Container(
                              margin: const EdgeInsets.symmetric(horizontal: 7.0),
                              child: const Text('/', style: TextStyle(color: Colors.white54, fontSize: 10.0,),),
                            ),
                            Text(duration.label(reference: duration), style: const TextStyle(color: Colors.white54, fontSize: 16.0, fontWeight: FontWeight.w600),),
                          ],
                        ),
                      ),
                    ),
                  ],
                );
              },
            ),
            /// 固定層
            // 紅包
            Positioned(
              left: 15.0,
              top: MediaQuery.of(context).padding.top + 20,
              child: Container(
                height: 40.0,
                width: 40.0,
                decoration: BoxDecoration(
                  color: Colors.black12,
                  borderRadius: BorderRadius.circular(100.0),
                ),
                child: UnconstrainedBox(
                  child: Image.asset('assets/images/time-hb.png', width: 30.0, fit: BoxFit.contain,),
                ),
              ),
            ),
          ],
        ),
      ),
    ],
  ),
);

flutter3直播模組

flutter直播模組包含了頂部資訊、底部進場提示+商品層+彈幕層+操作欄等幾個模組。

// 商品購買動效
Container(
  ...
),

// 加入直播間動效
const AnimationLiveJoin(
  joinQueryList: [
    {'avatar': 'assets/images/logo.png', 'name': 'andy'},
    {'avatar': 'assets/images/logo.png', 'name': 'jack'},
    {'avatar': 'assets/images/logo.png', 'name': '一條鹹魚'},
    {'avatar': 'assets/images/logo.png', 'name': '四季平安'},
    {'avatar': 'assets/images/logo.png', 'name': '葉子'},
  ],
),

// 送禮物動效
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': '一條鹹魚', 'avatar': 'assets/images/avatar/uimg1.jpg', 'num': 162},
    {'label': '人氣票', 'gift': 'assets/images/gift/gift4.png', 'user': 'Flower', 'avatar': 'assets/images/avatar/uimg5.jpg', 'num': 57},
    {'label': '鮮花', 'gift': 'assets/images/gift/gift5.png', 'user': '四季平安', 'avatar': 'assets/images/avatar/uimg3.jpg', 'num': 6},
    {'label': '捏捏小臉', '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': '葉子', 'avatar': 'assets/images/avatar/uimg7.jpg', 'num': 95},
    {'label': '親吻', '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': '宇輝', 'avatar': 'assets/images/avatar/uimg9.jpg', 'num': 3},
    {'label': '私人飛機', 'gift': 'assets/images/gift/gift16.png', 'user': 'Hison', 'avatar': 'assets/images/avatar/uimg10.jpg', 'num': 273},
  ],
),

// 直播彈幕+商品講解
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,
      ),
      // 商品講解
      Visibility(
        visible: isVisibleGoodsTalk,
        child: Column(
          ...
        ),
      ),
    ],
  ),
),

// 底部工具欄
Container(
  margin: const EdgeInsets.only(top: 7.0),
  child: Row(
    ...
  ),
),

直播聊天彈幕透過Flexible配合Text.rich / TextSpan實現訊息自適應佈局介面。

透過 SlideTransition 元件實現直播進場動畫。

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('歡迎 ${joinList![0]['name']} 加入直播間', style: const TextStyle(color: Colors.white, fontSize: 14.0,),)
      :
      Container()
    ,
  ),
);

class _AnimationLiveJoinState extends State<AnimationLiveJoin> with TickerProviderStateMixin {
  // 動畫控制器
  late AnimationController controller = AnimationController(
    vsync: this,
    duration: const Duration(milliseconds: 500), // 第一個動畫持續時間
  );
  late AnimationController controllerMix = AnimationController(
    vsync: this,
    duration: const Duration(milliseconds: 1000), // 第二個動畫持續時間
  );
  // 動畫
  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;
  // 是否第一個動畫
  bool animationFirst = true;
  // 是否空閒
  bool idle = true;
  // 加入直播間資料列表
  List? joinList;

  @override
  void initState() {
    super.initState();

    joinList = widget.joinQueryList!.toList();

    runAnimation();
    animation.addListener(() {
      if(animation.status == AnimationStatus.forward) {
        debugPrint('第一個動畫進行中');
        idle = false;
        setState(() {});
      }else if(animation.status == AnimationStatus.completed) {
        debugPrint('第一個動畫結束');
        animationFirst = false;
        if(controllerMix.isCompleted || controllerMix.isDismissed) {
          timer = Timer(const Duration(seconds: 2), () {
            controllerMix.forward();
            debugPrint('第二個動畫開始');
          });
        }
        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;
        // 執行下一個資料
        runAnimation();
        setState(() {});
      }
    });
  }

  void runAnimation() {
    if(joinList!.isNotEmpty) {
      // 空閒狀態才能執行，防止新增資料播放狀態混淆
      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();
  }

}

綜上就是flutter3實戰開發仿抖音的一些知識分享，由於涉及的技術點還是蠻多的，就沒有非常詳細的展開介紹了。希望以上的一些分享能給大家有些幫助~

最後附上兩個跨端專案

uniapp+vue3短影片直播商城：https://www.cnblogs.com/xiaoyan2017/p/17938517

tauri+vite4中後臺管理系統：https://www.cnblogs.com/xiaoyan2017/p/17552562