添加Keystore后Android Studio的build.gradle文件报错如何解决？

你的build.gradle(:app)存在括号嵌套错误、硬编码密码语法错误、未正确读取keystore.properties配置这几个核心问题，导致Gradle同步失败，以下是具体修复方案：

核心修复步骤 #

• 修正括号嵌套：原代码中android {}块错误嵌套在if (keystorePropertiesFile.exists()) {}内部，导致Gradle解析结构混乱
• 从配置文件读取密钥信息：不要硬编码密码和文件路径，通过keystoreProperties对象读取key.properties中的配置
• 规范路径与密码写法：避免使用<pass>这类无效语法，改用配置文件读取或合法的默认值

修正后的完整代码 #

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 FileNotFoundException("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"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    signingConfigs {
        debug {
            // 优先从key.properties读取，不存在则使用默认值
            storeFile file(keystoreProperties['storeFile'] ?: '~\\user\\keystores\\upload-keystore.jks')
            keyAlias keystoreProperties['keyAlias'] ?: 'upload'
            storePassword keystoreProperties['storePassword'] ?: '你的存储密码'
            keyPassword keystoreProperties['keyPassword'] ?: '你的密钥密码'
        }
    }
    compileSdkVersion 32

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

    defaultConfig {
        applicationId "com.example.flutter_application"
        minSdkVersion 16
        targetSdkVersion 32
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

补充配置说明 #

确保你的key.properties文件放在项目根目录，内容格式如下（替换为你的实际密钥信息）：

storeFile=~\\user\\keystores\\upload-keystore.jks
keyAlias=upload
storePassword=你的存储密码
keyPassword=你的密钥密码

内容的提问来源于stack exchange，提问作者mentos