无法在 Flutter 中构建已签名的 APK：任务 ':app:uploadCrashlyticsMappingFileRelease' 执行失败 java.net.SocketException: 套接字关闭

如何解决无法在 Flutter 中构建已签名的 APK：任务 ':app:uploadCrashlyticsMappingFileRelease' 执行失败 java.net.SocketException: 套接字关闭

我一直在开发 Flutter 应用程序，我能够使用 Android Studio 对话框成功构建甚至签署我的 APK。为此，我在 Android Studio 中打开 android 文件夹，继续构建 > 生成签名的 APK。

今天停止工作，消息：

> Task :app:uploadCrashlyticsMappingFileRelease FAILED
Execution failed for task ':app:uploadCrashlyticsMappingFileRelease'.
> java.net.SocketException: Socket closed

我的 build.gradle 看起来像这样：

def localProperties = new Properties()
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 plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'

android {
    compileSdkVersion 30

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        applicationId "my.app"
        minSdkVersion 23
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        setProperty("archivesBaseName",applicationId + "." + flutterVersionName + "." + flutterVersionCode)
    }

    buildTypes {
        release {
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
//            ndk {
//                abiFilters 'armeabi-v7a','arm64-v8a','x86_64'
//            }
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation platform('com.google.firebase:firebase-bom:26.2.0')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-auth-ktx'
}

我很困惑，为什么会发生这种情况。在过去的几天里，我只编辑了 *.dart 文件，根本没有更改 Android 项目。我仍然可以使用 Build > Build Bundle(s)/APK(s) > Build APK 来构建调试 APK。

解决方法

我刚刚重新启动了我的系统，现在一切又恢复了，所以没关系。