事实证明，处理此问题的最佳方法是在中进行以下更改
android/app/build.gradle：
android { compileSdkVersion 26 buildToolsVersion '26.0.3' lintOptions { disable 'InvalidPackage' } defaultConfig { applicationId "com.example.app" minSdkVersion 16 targetSdkVersion 26 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } signingConfigs { release { keyAlias keystoreProperties['keyAlias'] keyPassword keystoreProperties['keyPassword'] storeFile file(keystoreProperties['storeFile']) storePassword keystoreProperties['storePassword'] } } // This is the main section that I've updated // to get the release APK to build buildTypes { release { profile { matchingFallbacks = ['debug', 'release'] } signingConfig signingConfigs.release } }}flutter { source '../..'}dependencies { testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'}apply plugin: 'com.google.gms.google-services'通过此更改，我能够构建发行版APK。
