Could not find method compileSdkVersion() - flutter

Question

I am trying to build an android app bundle release but am getting an error that says ''Could not find method compileSdkVersion() for arguments [21] on project ':app' of type org.gradle.api.Project.'' I have tried reading about it but all in vain. The terminal specifically says that line 36 has the issue. The code block is just above the compileOptions{} code block. I have tried putting the code block in braces but does not work. I also tried flutter clean then the
flutter build appbundle but the same error kept coming up.Here is how my android/app/build.gradle looks like
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: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}
android //this is the line 36 in my code
compileSdkVersion flutter.compileSdkVersion
ndkVersion flutter.ndkVersion
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.example.eduself"
// You can update the following values to match your application needs.
// For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
minSdkVersion 21
targetSdkVersion flutter.targetSdkVersion
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
signingConfigs {
release {
keyAlias keystoreProperties['keyAlias']
keyPassword keystoreProperties['keyPassword']
storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
storePassword keystoreProperties['storePassword']
}
}
buildTypes {
release {
signingConfig signingConfigs.release
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}
apply plugin: 'com.google.gms.google-services'
Then this is the error my terminal throws after I run the flutter build appbundle.
PS C:\final> flutter build appbundle
Building with sound null safety
FAILURE: Build failed with an exception.
* Where:
Build file 'C:\final\android\app\build.gradle' line: 36
* What went wrong:
A problem occurred evaluating project ':app'.
> Could not find method compileSdkVersion() for arguments [21] on project ':app' of type org.gradle.api.Project.
* 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 6s
Running Gradle task 'bundleRelease'... 9.1s
Gradle task bundleRelease failed with exit code 1
PS C:\final>

Answer 1

Use like this:
compileSdkVersion 21
without any parentheses, its because you used some features or packages that are not available for current compile sdk and need to upgrade
i suggest to read this answer