How to fix this issue ? FAILURE: Build failed with an exception

Question

I try to add a package name as new_version: ^0.2.3. After the terminal return the below error. How can I fix this?

FAILURE: Build failed with an exception. Where: Build file 'D:\User\Projects\Flutter\apptech_beta-master.android\Flutter\build.gradle' line: 33

What went wrong: A problem occurred evaluating project ':flutter'.

Could not get unknown property 'compileSdkVersion' for extension 'flutter' of type FlutterExtension.

Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

Get more help at https://help.gradle.org

BUILD FAILED in 1s

This is the build.gradle file

exception: Gradle task assembleStagingDebug failed with exit code 1

    def flutterPluginVersion = 'managed'

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

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

android {
    compileSdkVersion 30
    buildToolsVersion = '30.0.2'
    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }

    defaultConfig {
        applicationId "com.app.app"
        minSdkVersion 22
        targetSdkVersion 30
        versionCode 13
        versionName "2.1"
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-project.txt'
        }
    }

    flavorDimensions "flavor"

    productFlavors {
        staging {
            dimension "flavor"
        }
    }


}
buildDir = new File(rootProject.projectDir, "../build/host")
dependencies {
    implementation project(':flutter')
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation platform('com.google.firebase:firebase-bom:28.3.1')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.android.material:material:1.4.0'
}

enter code here

Answer 1

I met this issue and fixed it by modifying the format of file key.properties. You can try to comment on the following line (and the following signingConfigs) to see if the build is success:

// keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

You can also reference the file local.properties for what the correct format of the properties file should be (path should be 2 \, no quotes...)

sdk.dir=C:\\Android\\sdk
flutter.sdk=C:\\src\\flutter
flutter.buildMode=release
flutter.versionName=1.0.0
flutter.versionCode=2