有时当我通过 Android Studio 在 iPhone 模拟器上运行我的 Flutter 应用程序时，我会收到下面的 IDE 错误“FlutterApp.setLaunchMode must not be null”完整堆栈跟踪。我怎样才能解决这个问题？谢谢。

java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor81.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.intellij.execution.process.ProcessHandler$5.invoke(ProcessHandler.java:223) at com.sun.proxy.$Proxy17.onTextAvailable(Unknown Source) at com.intellij.execution.process.ProcessHandler.notifyTextAvailable(ProcessHandler.java:197) at com.intellij.execution.process.BaseOSProcessHandler$SimpleOutputReader.onTextAvailable(BaseOSProcessHandler.java:198) at com.intellij.util.io.BaseOutputReader.sendText(BaseOutputReader.java:202) at com.intellij.util.io.BaseOutputReader.processInput(BaseOutputReader.java:186) at com.intellij.util.io.BaseOutputReader.readAvailableNonBlocking(BaseOutputReader.java:105) at com.intellij.util.io.BaseDataReader.readAvailable(BaseDataReader.java:85) at com.intellij.util.io.BaseDataReader.doRun(BaseDataReader.java:163) at com.intellij.util.io.BaseDataReader$1$1.run(BaseDataReader.java:66) at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:229) at com.intellij.util.io.BaseDataReader$1.run(BaseDataReader.java:63) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.IllegalArgumentException: Argument for @NotNull parameter 'launchMode' of io/flutter/run/daemon/FlutterApp.setLaunchMode must not be null at io.flutter.run.daemon.FlutterApp.$$$reportNull$$$0(FlutterApp.java) at io.flutter.run.daemon.FlutterApp.setLaunchMode(FlutterApp.java) at io.flutter.run.daemon.FlutterAppDaemonEventListener.onAppStarting(FlutterApp.java:726) at io.flutter.run.daemon.DaemonEvent$AppStarting.accept(DaemonEvent.java:190) at io.flutter.run.daemon.DaemonEvent.dispatch(DaemonEvent.java:52) at io.flutter.run.daemon.DaemonApi.dispatch(DaemonApi.java:171) at io.flutter.run.daemon.DaemonApi$1.onTextAvailable(DaemonApi.java:142) ... 20 more

最佳答案

所以我今天也遇到了这个问题。 我正在运行 Android Studio 并以 Android 模拟器为目标，因此它似乎比目标更与核心相关。

.. 原因:java.lang.IllegalArgumentException:io/flutter/run/daemon/FlutterApp.setLaunchMode 的@NotNull 参数“launchMode”的参数不能为空

Android Studio 3.3.1 Windows 10 64 位

我会在发现相关信息时对其进行编辑。

关于android-studio - 在 iPhone 模拟器上运行 Flutter 应用时偶尔出现 IDE 错误。 FlutterApp.setLaunchMode 不能为 null，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54795809/