flutter-template/android/app/build.gradle

import java.text.SimpleDateFormat

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"

android {
    compileSdkVersion 30
//    ndkVersion "21.3.6528147"

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

    applicationVariants.all { variant ->
        variant.outputs.all {
            def versionName = defaultConfig.versionName
            def date = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())
            if (variant.buildType.name == 'release') {
                outputFileName = "ctjt_flutter_${variant.buildType.name}_${versionName}_${date}.apk"
            } else if (variant.buildType.name == 'debug') {
                outputFileName = "ctjt_flutter_${versionName}_${date}.apk"
            }
        }
    }

    signingConfigs {
        debug {
            storeFile file('android_key.keystore')
            storePassword 'abcd1234'
            keyAlias 'ctjt_flutter'
            keyPassword 'abcd1234'
        }
        release {
            storeFile file('android_key.keystore')
            storePassword 'abcd1234'
            keyAlias 'ctjt_flutter'
            keyPassword 'abcd1234'
        }
    }

    lintOptions {
        disable 'InvalidPackage'
        //如打包出现Failed to transform libs.jar to match attributes
        //checkReleaseBuilds false
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.ctjt_flutter"
        minSdkVersion 19
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true
        // Bugly相关配置
//        ndk {
//            //设置支持的SO库架构
//            abiFilters 'armeabi-v7a'//, 'arm64-v8a', 'x86', 'x86_64'
//        }
    }

    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        release {
            // Signing with the debug keys for now, so `flutter run --release` works.
            //signingConfig signingConfigs.debug
            signingConfig signingConfigs.release
            minifyEnabled false  // 资源压缩设置
            shrinkResources false // 删除无用资源
            useProguard true    // 代码压缩设置
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' // 读取代码压缩配置文件
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    // 引入support支持库的multidex库
    implementation 'com.android.support:multidex:1.0.3'
}