我将flutter更新为1.22.0,现在我的video_player给了我Exception错误。在我将Flutter更新为1.22.0之前,它运行良好。
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:“代码!= null”:不正确。 E /颤振(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
新的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 (包: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 (包: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 (包: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(包: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 (包: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 (包:flutter / src / widgets / framework.dart:6118:14)E / flutter( 8545):#26 Element.inflateWidget (package:flutter / src / widgets / framework.dart:3569:14)E / flutter( 8545):#27 Element.updateChild (package:flutter / src / widgets / framework.dart:3327:18)E / flutter( 8545):#28 SingleChildRenderObjectElement.mount (包: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 (包: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 (package: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(包: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 (包: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 (package:flutter / src / widgets / framework.dart:3327:18)E / flutter( 8545):#43 ComponentElement.performRebuild (package:flutter / 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(),
);
}
}
需要帮助以解决此问题。
答案 0 :(得分:2)
为了使我的video_player正常工作,我不得不将其flutter版本降级为1.20.2。
如果还有其他解决方法,请告诉我。
答案 1 :(得分:1)
或者,如果您未使用视频播放器插件中的任何新功能,则可以将视频播放器降级为 0.10.11 + 2 ,而不是将抖动降级。
您可以在此处找到更多详细信息:https://github.com/flutter/flutter/issues/66627
答案 2 :(得分:0)
同样的问题,我刚刚升级了 Flutter 版本 1.22.5 并且它工作了