flutter - GradleException 显示红色表示是否有任何错误

Question

我的应用程序在我重置我的电脑之前运行良好，重置后我下载了所有文件并成功安装。但应用程序现在不起作用，显示一些错误，我不知道背后的原因是什么。 GradleException 显示红色是任何错误或如何解决它，请解释我完全是 flutter 的新手。

我已经在尝试添加 grdla 文件“GRADLE_HOME”的环境变量。

def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply from: "C:/src/flutter/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 28

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.helpem.helpem"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    implementation 'com.google.firebase:firebase-analytics:17.2.0'
}
apply plugin: 'com.google.gms.google-services'
apply plugin: 'findbugs'

java.lang.ClassNotFoundException: com.google.wireless.android.sdk.stats.IntellijIndexingStats$Index
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at com.intellij.util.indexing.counters.IndexCounters.<clinit>(IndexCounters.java:34)
    at com.intellij.util.indexing.impl.MapReduceIndex.<init>(MapReduceIndex.java:85)
    at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex$CompilerMapReduceIndex.<init>(CompilerReferenceIndex.java:232)
    at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex.<init>(CompilerReferenceIndex.java:79)
    at org.jetbrains.jps.backwardRefs.JavaCompilerBackwardReferenceIndex.<init>(JavaCompilerBackwardReferenceIndex.java:12)
    at org.jetbrains.jps.backwardRefs.JavaBackwardReferenceIndexWriter.initialize(JavaBackwardReferenceIndexWriter.java:79)
    at org.jetbrains.jps.incremental.java.JavaBuilder.buildStarted(JavaBuilder.java:148)
    at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:363)
    at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:178)
    at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:302)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:135)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:228)
    at org.jetbrains.jps.service.impl.SharedThreadPoolImpl.lambda$executeOnPooledThread$0(SharedThreadPoolImpl.java:42)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

flutter 医生

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    X Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.
[√] Android Studio (version 3.5)
[√] Connected device (1 available)

! Doctor found issues in 1 category.

C:\Users\dheer\AndroidStudioProjects\helpem\helpem> flutter doctor --android-licenses
A newer version of the Android SDK is required. To update, run:
C:\Users\dheer\AppData\Local\Android\sdk\tools\bin\sdkmanager --update



C:\Users\dheer\AndroidStudioProjects\helpem\helpem>C:\Users\dheer\AppData\Local\Android\sdk\tools\bin\sdkmanager --update
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
        at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
        at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
        at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:604)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 5 more

C:\Users\dheer\AndroidStudioProjects\helpem\helpem>

Answer 1

如果这对你来说很烦人(就像对我一样🤬)
将其替换为
前

throw new GradleException(...)

后

throw new FileNotFoundException(...)

然后将项目 SDK 设置为 Android API 29 平台(或更新版本)
在这样的项目设置中:

而且红肿会消失🙂