使用supabase_flutter时为何出现compileSdkVersion未指定的编译错误？

问题详情 #

• 编译错误：配置:shared_preferences_android项目时失败

Failed to notify project evaluation listener.
Cannot invoke method substring() on null object
compileSdkVersion is not specified. Please add it to build.gradle

• 疑似触发场景：升级Flutter 3.19后出现（暂未完全确认）

解决方案 #

1. 替换动态compileSdkVersion为具体版本号 #

在app/build.gradle的android块中，将compileSdk flutter.compileSdkVersion替换为明确的版本号（Flutter 3.19对应推荐版本为34），同时同步targetSdkVersion：

android {
    // ...其他配置
    compileSdk 34
    ndkVersion flutter.ndkVersion

    defaultConfig {
        // ...其他配置
        targetSdkVersion 34
        // ...其他配置
    }
    // ...其他配置
}

2. 确保根目录build.gradle配置匹配 #

检查项目根目录下的build.gradle，确保Gradle插件和Kotlin版本与Flutter 3.19兼容：

buildscript {
    ext.kotlin_version = '1.9.0'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.4.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

3. 清理缓存后重新构建 #

执行以下命令清除缓存并重新编译：

flutter clean
rm -rf android/.gradle
flutter pub get
flutter run

原app/build.gradle代码 #

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

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

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

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

android {
    namespace "com.example.exp"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

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

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.app"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    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 {}

内容的提问来源于stack exchange，提问作者A.Sanchez.SD