Flutter NoSuchMethodError:getter';cls&x27;被调用为空

Flutter NoSuchMethodError:getter';cls&x27;被调用为空,flutter,Flutter,如何解决以下问题 我的应用程序运行正常,运行良好 但当我设置了断点,然后试图调试我的代码 它总是显示不是来自我的代码的错误消息,调试器也会被中断 未处理的异常: NoSuchMethodError:对null调用了getter“cls”。 收件人:空 已尝试呼叫:cls #0 Object.noSuchMethod(省道:核心补片/对象补片。省道:50:5) #1 BodyBuilder.lookupInstanceMember(包:前端/src/fasta/kernel/BodyBuilder

如何解决以下问题

我的应用程序运行正常,运行良好

但当我设置了断点,然后试图调试我的代码

它总是显示不是来自我的代码的错误消息,调试器也会被中断

未处理的异常: NoSuchMethodError:对null调用了getter“cls”。 收件人:空 已尝试呼叫:cls #0 Object.noSuchMethod(省道:核心补片/对象补片。省道:50:5) #1 BodyBuilder.lookupInstanceMember(包:前端/src/fasta/kernel/BodyBuilder.dart:1604:30) #2 BodyBuilder.scopeLookup(包:前端/src/fasta/kernel/BodyBuilder.dart:1764:13) #3 BodyBuilder.handleIdentifier(包:前端/src/fasta/kernel/BodyBuilder.dart:1700:12) #4 Parser.ensureIdentifier(包:前端/src/fasta/Parser/Parser.dart:2165:14) #5 Parser.parseSend(包:前端/src/fasta/Parser/Parser.dart:4932:32) #6 Parser.parseSendOrFunctionLiteral(包:前端/src/fasta/Parser/Parser.dart:4675:12) #7 Parser.parsePrimary(包:前端/src/fasta/Parser/Parser.dart:4233:14) #8 Parser.parseUnaryExpression(包:前端/src/fasta/Parser/Parser.dart:4172:12) #9 Parser.parsePrevenceExpression(包:前端/src/fasta/Parser/Parser.dart:3961:13) #10 Parser.parseExpression(包:前端/src/fasta/Parser/Parser.dart:3933:13) #11 BodyBuilder.parseSingleExpression(包:前端/src/fasta/kernel/BodyBuilder.dart:1111:20) #12 SourceLoader.buildExpression(包:前端/src/fasta/source/source\u加载器.dart:327:21) #13 IncrementalCompiler.compileExpression。(包:前端/src/fasta/incremental\u编译器。dart:795:61) #14 CompilerContext.runInContext。。 (包:front\u end/src/fasta/compiler\u context.dart:122:46) #15 new Future.sync(dart:async/Future.dart:224:31) #16 CompilerContext.runInContext。(包:front\u end/src/fasta/compiler\u context.dart:122:19) #17_rootRun(dart:async/zone.dart:1124:13) #18_CustomZone.run(dart:async/zone.dart:1021:19) #19_运行分区(dart:async/zone.dart:1516:10) #20运行分区(dart:async/zone.dart:1463:12) #21 CompilerContext.runInContext(包:front\u end/src/fasta/compiler\u context.dart:121:12) #22 IncrementalCompiler.compileExpression(包:前端/src/fasta/IncrementalCompiler.dart:726:26) #23 IncrementalCompiler.compileExpression(包:vm/incremental\u compiler.dart:156:23) #24 FrontendCompiler.compileExpression(包:vm/frontend_server.dart:527:44) #25 _frontendcompiler.compileExpression(包:frontendu server/server.dart:62:22) #26个列表并编译。(软件包:虚拟机/前端服务器。dart:812:20) #27_RootZone.runUnaryGuarded(dart:async/zone.dart:1314:10) #28 _BufferingStreamSubscription._sendData(dart:async/stream\u impl.dart:336:11) #29 _BufferingStreamSubscription._add(dart:async/stream\u impl.dart:263:7) #30 SinkTransformersStreamSubscription.add(dart:async/stream_transformers.dart:68:11) #31 _EventSinkWrapper.add(dart:async/stream_transformers.dart:15:11) #32 _StringAdapterSink.add(dart:convert/string_convertion.dart:236:11) #33 _LineSplitterSink._addLines(省道:转换/线分割器。省道:150:13) #34 _LineSplitterSink.addSlice(省道:转换/线拆分器。省道:125:5) #35 StringConversionSinkMixin.add(dart:conversion/string\u conversion.dart:163:5) #36 SinkTransformerStreamSubscription.handleData(dart:async/stream_transformers.dart:120:24) #37_RootZone.runUnaryGuarded(dart:async/zone.dart:1314:10) #38 _BufferingStreamSubscription._sendData(dart:async/stream\u impl.dart:336:11) #39 _BufferingStreamSubscription._add(dart:async/stream\u impl.dart:263:7) #40 SinkTransformersStreamSubscription.add(dart:async/stream_transformers.dart:68:11) #41\u EventSinkWrapper.add(dart:async/stream\u transformers.dart:15:11) #42 _StringAdapterSink.add(dart:convert/string_convertion.dart:236:11) #43 _StringAdapterSink.addSlice(省道:转换/字符串转换。省道:241:7) #44\u Utf8ConversionSink.addSlice(dart:conversion/string\u conversion.dart:312:20) #45_Utf8ConversionSink.add(dart:conversion/string_conversion.dart:305:5) #46_ConverterStreamEventSink.add(dart:convert/chunked_conversion.dart:72:18) #47 SinkTransformersStreamSubscription.handleData(dart:async/stream_transformers.dart:120:24) #48_RootZone.runUnaryGuarded(dart:async/zone.dart:1314:10) #49 _BufferingStreamSubscription._sendData(dart:async/stream\u impl.dart:336:11) #50 _BufferingStreamSubscription._add(dart:async/stream\u impl.dart:263:7) #51 \u SyncStreamController.\u sendData(dart:async/stream\u controller.dart:764:19) #52 _StreamController._add(dart:async/stream_controller.dart:640:7) #53_StreamController.add(dart:async/stream_controller.dart:586:5) #54 _-Socket._-onData(省道:io补丁/插座补丁。省道:1786:41) #55_RootZone.runUnaryGuarded(dart:async/zone.dart:1314:10) #56 _BufferingStreamSubscription._sendData(dart:async/stream\u impl.dart:336:11) #57 _BufferingStreamSubscription._add(dart:async/stream\u impl.dart:263:7) #58 \u SyncStreamController.\u sendData(dart:async/stream\u controller.dart:764:19) #59_StreamController._add(dart:async/stream_controller.dart:640:7) #60_StreamController.add(dart:async/stream_controller.dart:586:5) #61个新插座。(省道:io补丁/插座补丁。省道:1335:33) #62 _NativeSocket.issueReadEvent.issue(dart:io)
  Flame.images.loadAll(<String>[
    'level0.jpg'
  ]);

  Util flameUtil = Util();
  await flameUtil.fullScreen();
  await flameUtil.setOrientation(DeviceOrientation.portraitUp);
  MyGame game = MyGame ();
  runApp(game.widget);
 ....
......
      MyGame() {
        sprite = Sprite('level0.jpg');// Break point
      }
.............
I am using Android studio 3.1
flutter veriosn 1.7.8
channel stable