No implementation found for method dispose on channel

[zxl777]

Type (MissingPluginException)
No implementation found for method dispose on channel flutter_video_plugin/getVideoView_0

Step 1:
Navigator.pop(context, false);


Step 2:
  void deactivate() {
    _controller.dispose();
    playerInitialized = false;
    super.deactivate();
  }

Step 3:
  void dispose() {
    _methodChannel.invokeMethod("dispose");
  }

[zxl777]

As long as deactivate is triggered, the bug will reappear.
The following is an example that I rewritten. Clicking the camera button will trigger this problem.

import 'dart:async';
import 'dart:typed_data';

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

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(home: MyAppScaffold());
  }
}

class MyAppScaffold extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => MyAppScaffoldState();
}

class MyAppScaffoldState extends State<MyAppScaffold> {
  Uint8List image;
  var hide = false;
  VlcPlayerController _videoViewController;
  VlcPlayerController _videoViewController2;
  bool isPlaying = true;
  double sliderValue = 0.0;
  double currentPlayerTime = 0;
  double volumeValue = 100;

  @override
  void initState() {
    _videoViewController = new VlcPlayerController(onInit: () {
      _videoViewController.play();
    });
    _videoViewController.addListener(() {
      setState(() {});
    });

    _videoViewController2 = new VlcPlayerController(onInit: () {
      _videoViewController2.play();
    });
    _videoViewController2.addListener(() {
      setState(() {});
    });

    Timer.periodic(Duration(seconds: 1), (Timer timer) {
      String state = _videoViewController2.playingState.toString();
      if (this.mounted) {
        setState(() {
          if (state == "PlayingState.PLAYING" &&
              sliderValue < _videoViewController2.duration.inSeconds) {
            sliderValue = _videoViewController2.position.inSeconds.toDouble();
          }
        });
      }
    });

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: const Text('Plugin example app'),
      ),
      floatingActionButton: FloatingActionButton(
          child: Icon(Icons.camera),
          // onPressed: _createCameraImage,
          onPressed: () {
            setState(() {
              hide = true;
            });
          }),
      body: hide
          ? SizedBox(
              height: 100,
            )
          : Center(
              child: ListView(
                shrinkWrap: true,
                children: <Widget>[
                  SizedBox(
                    height: 360,
                    child: new VlcPlayer(
                      aspectRatio: 16 / 9,
                      url:
                          "https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ForBiggerJoyrides.mp4",
                      controller: _videoViewController,
                      // Play with vlc options
                      options: [
                        '--quiet',
                        '--no-drop-late-frames',
                        '--no-skip-frames',
                        '--rtsp-tcp'
                      ],
                      hwAcc: HwAcc
                          .DISABLED, // or {HwAcc.AUTO, HwAcc.DECODING, HwAcc.FULL}
                      placeholder: Container(
                        height: 250.0,
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[CircularProgressIndicator()],
                        ),
                      ),
                    ),
                  ),
                  SizedBox(
                    height: 360,
                    child: new VlcPlayer(
                      aspectRatio: 16 / 9,
                      url:
                          "http://distribution.bbb3d.renderfarming.net/video/mp4/bbb_sunflower_1080p_60fps_normal.mp4",
                      controller: _videoViewController2,
                      placeholder: Container(
                        height: 250.0,
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[CircularProgressIndicator()],
                        ),
                      ),
                    ),
                  ),
                  Text("Seek"),
                  Slider(
                    activeColor: Colors.white,
                    value: sliderValue,
                    min: 0.0,
                    max: _videoViewController2.duration == null
                        ? 1.0
                        : _videoViewController2.duration.inSeconds.toDouble(),
                    onChanged: (progress) {
                      setState(() {
                        sliderValue = progress.floor().toDouble();
                      });
                      //convert to Milliseconds since VLC requires MS to set time
                      _videoViewController2.setTime(sliderValue.toInt() * 1000);
                    },
                  ),
                  FlatButton(
                      child: isPlaying
                          ? Icon(Icons.pause)
                          : Icon(Icons.play_arrow),
                      onPressed: () => {playOrPauseVideo()}),
                  Text("Volume Level"),
                  Slider(
                    min: 0,
                    max: 100,
                    value: volumeValue,
                    onChanged: (value) {
                      setState(() {
                        volumeValue = value;
                      });
                      _videoViewController2.setVolume(volumeValue.toInt());
                    },
                  ),
                  FlatButton(
                    child: Text("Change URL"),
                    onPressed: () => _videoViewController.setStreamUrl(
                        "http://distribution.bbb3d.renderfarming.net/video/mp4/bbb_sunflower_2160p_60fps_normal.mp4"),
                  ),
                  FlatButton(
                      child: Text("+speed"),
                      onPressed: () =>
                          _videoViewController.setPlaybackSpeed(2.0)),
                  FlatButton(
                      child: Text("Normal"),
                      onPressed: () =>
                          _videoViewController.setPlaybackSpeed(1)),
                  FlatButton(
                      child: Text("-speed"),
                      onPressed: () =>
                          _videoViewController.setPlaybackSpeed(0.5)),
                  Text("position=" +
                      _videoViewController.position.inSeconds.toString() +
                      ", duration=" +
                      _videoViewController.duration.inSeconds.toString() +
                      ", speed=" +
                      _videoViewController.playbackSpeed.toString()),
                  Text("ratio=" + _videoViewController.aspectRatio.toString()),
                  Text("size=" +
                      _videoViewController.size.width.toString() +
                      "x" +
                      _videoViewController.size.height.toString()),
                  Text("state=" + _videoViewController.playingState.toString()),
                  image == null
                      ? Container()
                      : Container(child: Image.memory(image)),
                ],
              ),
            ),
    );
  }

  void playOrPauseVideo() {
    String state = _videoViewController2.playingState.toString();

    if (state == "PlayingState.PLAYING") {
      _videoViewController2.pause();
      setState(() {
        isPlaying = false;
      });
    } else {
      _videoViewController2.play();
      setState(() {
        isPlaying = true;
      });
    }
  }

  void _createCameraImage() async {
    Uint8List file = await _videoViewController.takeSnapshot();
    setState(() {
      image = file;
    });
  }
}

[dev-marceloborba]

Same problem here. When I leave the page, my router calls a dispose method and then an exception occurs.

[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: MissingPluginException(No implementation found for method dispose on channel flutter_video_plugin/getVideoView_0)
#0      MethodChannel._invokeMethod 
package:flutter/…/services/platform_channel.dart:157
<asynchronous suspension>
#1      MethodChannel.invokeMethod 
package:flutter/…/services/platform_channel.dart:332
#2      VlcPlayerController.dispose 
package:flutter_vlc_player/flutter_vlc_player.dart:721
#3      _VlcPlayerState.deactivate 
package:flutter_vlc_player/flutter_vlc_player.dart:190
#4      StatefulElement.deactivate 
package:flutter/…/widgets/framework.dart:4847
#5      _InactiveElements._deactivateRecursively 
package:flutter/…/widgets/framework.dart:2016
#6      SingleChildRenderObjectElement.visitChildren 
package:flutter/…/widgets/framework.dart:6105
#7      _InactiveElements._deactivateRecursively 
package:flutter/…/widgets/framework.dart:2018
#8      SingleChildRenderObjectElement.vi<…>
[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: MissingPluginException(No implementation found for method dispose on channel flutter_video_plugin/getVideoView_1)
#0      MethodChannel._invokeMethod 
package:flutter/…/services/platform_channel.dart:157
<asynchronous suspension>
#1      MethodChannel.invokeMethod 
package:flutter/…/services/platform_channel.dart:332
#2      VlcPlayerController.dispose 
package:flutter_vlc_player/flutter_vlc_player.dart:721
#3      _VlcPlayerState.dispose 
package:flutter_vlc_player/flutter_vlc_player.dart:197
#4      StatefulElement.unmount 
package:flutter/…/widgets/framework.dart:4854
#5      _InactiveElements._unmount 
package:flutter/…/widgets/framework.dart:1998
#6      _InactiveElements._unmount.<anonymous closure> 
package:flutter/…/widgets/framework.dart:1996
#7      SingleChildRenderObjectElement.visitChildren 
package:flutter/…/widgets/framework.dart:6105
#8      _InactiveElements._unmount (package:flutter/src/<…>