我将颤振更新到 1.22.0，现在我的 video_player 给了我异常错误。在我将颤振更新到 1.22.0 之前它工作正常。
这是我的错误：
E/flutter（8545）：[错误：flutter/lib/ui/ui_dart_state.cc（177）]未处理的异常：'package：flutter/src/services/message_codec.dart'：断言失败：第111行pos 15：'code != null': 不正确。E/flutter (8545): #0
_AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:46:39) E/flutter (8545): #1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart: 36:5) E/flutter (8545): #2
new PlatformException (package:flutter/src/services/message_codec.dart:111:15) E/flutter (8545): #3 VideoPlayerApi.create (package:video_player_platform_interface/messages .dart:205:13) E/flutter (8545): E/flutter (8545): #4
MethodChannelVideoPlayer.create (package:video_player_platform_interface/method_channel_video_player.dart:46:42) E/flutter (8545): #5 VideoPlayerController.initialize (package:video_player/video_player.dart:275:45) E/flutter (8545): #6 _ScreenBackgroundVideoState.initState (package:flow/widget/background/screen_background_video.dart:17:9) E/flutter (8545): #7 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4765:58) E /flutter (8545): #8 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4601:5) E/flutter (8545): #9 Element.inflateWidget (package:flutter/src/widgets/framework .dart:3569:14) E/flutter (8545): #10 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6236:32) E/flutter (8545): #11 Element.inflateWidget (package ：flutter/src/widgets/framework.dart:3569:14) E/flutter (8545): #12 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #13 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/flutter (8545): #14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14 ) E/flutter (8545): #15 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #16 ComponentElement.performRebuild (package:flutter/src/widgets /framework.dart:4652:16) E/flutter (8545): #17 Element.rebuild (package:flutter/src/widgets/framework.dart:4343:5) E/flutter (8545): #18 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4606:5) E/flutter (8545): #19 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4601:5) E/flutter (8545): #20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/flutter (8545): #21 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #22 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14 ) E/flutter (8545): #23 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/flutter (8545): #24 Element.updateChild (package:flutter/src/widgets /framework.dart:3327:18) E/flutter (8545): #25 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/flutter (8545): #26 Element.inflateWidget （包：flutter/src/widgets/framework.dart:3569:14）E/flutter（8545）：#27 Element.updateChild（包：flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #28 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/flutter (8545): #29 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/flutter (8545): #30 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18 ) E/flutter (8545): #31 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6118:14) E/flutter (8545): #32 Element.inflateWidget (package:flutter/src/widgets /framework.dart:3569:14) E/flutter (8545): #33 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #34 ComponentElement.performRebuild （包：flutter/src/widgets/framework.dart:4652:16）E/flutter（8545）：#35 Element.rebuild（包：flutter/src/widgets/framework.dart:4343:5) E/flutter (8545): #36 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4606:5) E/flutter (8545): #37 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4601:5) E/flutter (8545): #38 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14 ) E/flutter (8545): #39 Element.updateChild (package:flutter/src/widgets/framework.dart:3327:18) E/flutter (8545): #40 SingleChildRenderObjectElement.mount (package:flutter/src/widgets /framework.dart:6118:14) E/flutter (8545): #41 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3569:14) E/flutter (8545): #42 Element.updateChild （包：flutter/src/widgets/framework.dart:3327:18）E/flutter（8545）：#43 ComponentElement.performRebuild（包：颤振/src/widgets/framework.dart:4652:16)
这是我的代码：
import 'package:flutter/material.dart';
import 'package:video_player/video_player.dart';
class ScreenBackgroundVideo extends StatefulWidget {
@override
_ScreenBackgroundVideoState createState() => _ScreenBackgroundVideoState();
}
class _ScreenBackgroundVideoState extends State<ScreenBackgroundVideo> {
VideoPlayerController _controller;
@override
void initState() {
super.initState();
_controller = VideoPlayerController.asset('assets/vid/login.mp4')
// set background video using assets for login screen
..initialize().then((_) {
// Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
setState(() {});
}); // background video will play as soon as the splashscreen is closed
_controller.play();
_controller
.setLooping(true); // looping set to true for the background video
_controller.setVolume(0); // volume set to 0 for background video
}
@override
void dispose() {
super.dispose();
// TODO: implement dispose
_controller.dispose(); // Dispose the controller after play is done.
}
@override
Widget build(BuildContext context) {
return Container(
child: _controller.value.initialized
? AspectRatio(
aspectRatio: _controller.value.aspectRatio,
child: VideoPlayer(_controller),
)
: Container(),
);
}
}
需要帮助来解决这个问题。