Flutter实现视频全屏播放逻辑

dependencies:
  flutter_video_player: ^版本号

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

class VideoPlayerScreen extends StatefulWidget {
  final String videoUrl;

  VideoPlayerScreen({Key key, this.videoUrl}) : super(key: key);

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

class _VideoPlayerScreenState extends State<VideoPlayerScreen> {
  VideoPlayerController _controller;

  @override
  void initState() {
    super.initState();
    _controller = VideoPlayerController.network(widget.videoUrl)
      ..initialize().then((_) {
        setState(() {});
      });
  }

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

  @override
  Widget build(BuildContext context) {
    if (!_controller.value.initialized) {
      return Center(child: CircularProgressIndicator());
    }
    return AspectRatio(
      aspectRatio: _controller.value.aspectRatio,
      child: VideoPlayer(_controller),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_video_player/flutter_video_player.dart';

class VideoPlayerScreen extends StatefulWidget {
  final String videoUrl;

  VideoPlayerScreen({Key key, this.videoUrl}) : super(key: key);

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

class _VideoPlayerScreenState extends State<VideoPlayerScreen> {
  VideoPlayerController _controller;
  bool _isFullScreen = false;

  @override
  void initState() {
    super.initState();
    _controller = VideoPlayerController.network(widget.videoUrl)
      ..initialize().then((_) {
        setState(() {});
      });
  }

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

  void _toggleFullScreen() {
    setState(() {
      _isFullScreen = !_isFullScreen;
      if (_isFullScreen) {
        SystemChrome.setEnabledSystemUIOverlays([]);
        SystemChrome.setPreferredOrientations(
          [DeviceOrientation.landscapeLeft, DeviceOrientation.landscapeRight],
        );
      } else {
        SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values);
        SystemChrome.setPreferredOrientations(DeviceOrientation.values);
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    if (!_controller.value.initialized) {
      return Center(child: CircularProgressIndicator());
    }
    return Scaffold(
      body: OrientationBuilder(
        builder: (context, orientation) {
          return Stack(
            fit: StackFit.expand,
            children: <Widget>[
              AspectRatio(
                aspectRatio: _controller.value.aspectRatio,
                child: VideoPlayer(_controller),
              ),
              Positioned(
                top: 20.0,
                right: 20.0,
                child: GestureDetector(
                  onTap: _toggleFullScreen,
                  child: Icon(
                    _isFullScreen ? Icons.fullscreen_exit : Icons.fullscreen,
                    color: Colors.white,
                  ),
                ),
              ),
            ],
          );
        },
      ),
    );
  }
}