mobileCyberGamesApp/lib/widget/VideoWidget.dart

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

class VideoWidget extends StatefulWidget {
  VideoWidget({Key key, this.videoSrc}) : super(key: key);
  final String videoSrc; // 用来储存传递过来的值

  @override
  VideoWidgetState createState() => VideoWidgetState();
}

class VideoWidgetState extends State<VideoWidget> {
  VideoPlayerController _controller;
  String _defaultVideo =
      'http://oss.izouma.com/shouyoudianjing/video/2019-03-01-11-19-41-ivqsgiy9.mp4';
  bool isVideo = true;
  bool showVideo = false;
  bool isPlay = false;

  @override
  void initState() {
    super.initState();
    if (widget.videoSrc == null) {
    } else {
      if (widget.videoSrc.contains('.mp4')) {
        _defaultVideo = widget.videoSrc;
        isVideo = true;
      } else {
        isVideo = false;
      }
    }

    print('**********');
    print(isVideo);
    print(_defaultVideo);
    print(widget.videoSrc);
    if (isVideo) {
      _controller = VideoPlayerController.network(_defaultVideo)
        ..initialize().then((_) {
          // Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
          setState(() {});
        });
        _controller.setLooping(true);
      _controller.addListener(() {
        setState(() {
          isPlay = _controller.value.isPlaying;
        });
        // if(_controller.value.isLooping)
      });
    }
  }

  @override
  void dispose() {
    super.dispose();
    _controller.dispose();
  }

  void playVideo() async {
    if (!showVideo) {
      setState(() {
        showVideo = true;
      });
      await Future.delayed(Duration(milliseconds: 500));
    }
    _controller.value.isPlaying ? _controller.pause() : _controller.play();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
        child: Column(
      children: <Widget>[
        isVideo
            ? _playContainer()
            : Image.network(widget.videoSrc, width: double.infinity,height: 210,fit: BoxFit.cover,)
      ],
    ));
  }
  
  Widget _playContainer() {
    return Container(
      color: Colors.black,
      height: 210,
      width: double.infinity,
      child: Center(
        child: Stack(
          children: <Widget>[
            InkWell(
                child: Center(
                  child: showVideo
                    ? AspectRatio(
                        aspectRatio: _controller.value.aspectRatio,
                        child: VideoPlayer(_controller),
                      )
                    : Image.network(
                        'http://images.liqucn.com/img/h22/h70/img_localize_8e824debdd9ee29522690f36680e2d8e_600x337.png',
                        width: double.infinity),
                ),
                onTap: () => playVideo()),
            !isPlay
                ? Positioned(
                    left: 0,
                    right: 0,
                    top:83,
                    child: Center(
                      child: UnconstrainedBox(
                        child: Container(
                          width: 44,
                          height: 44,
                          child: RaisedButton(
                            shape: RoundedRectangleBorder(
                                borderRadius: BorderRadius.circular(44)),
                            padding: EdgeInsets.all(0),
                            color: Colors.black87,
                            textColor: Colors.white,
                            onPressed: () => playVideo(),
                            child:
                                Icon(isPlay ? Icons.pause : Icons.play_arrow),
                          ),
                        ),
                      ),
                    ))
                : Container(),
          ],
        ),
      ),
    );
    // return InkWell(
    //   child: AspectRatio(
    //     aspectRatio: _controller.value.aspectRatio,
    //     child: VideoPlayer(_controller),
    //   ),
    //   onTap: () {
    //     _controller.value.isPlaying ? _controller.pause() : _controller.play();
    //   },
    // );
  }
}