In my case I run flutter build apk -t lib/main_dev.dart --release --flavor=dev command to build a release APK, I have setup build flavors in my project. But after I run that command it gives "A problem occurred evaluating project ':app'.> Cannot get property '?' on null object" error. Here is my app level build.gradle file,
android {
compileSdkVersion 31
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = '1.8'
}
lintOptions {
checkReleaseBuilds false │
}
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.getin.app***"
minSdkVersion 21
targetSdkVersion 31
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
multiDexEnabled true
}
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
}
}
flavorDimensions "app"
productFlavors {
dev {
dimension "app"
versionNameSuffix "-dev"
resValue "string", "app_name", "GetIn Dev"
resValue "string", "facebook_app_id", "5982**********"
resValue "string", "facebook_client_token", "d8f78c******************"
resValue "string", "fb_login_protocol_scheme", "fb*****************"
}
prod {
dimension "app"
applicationId "com.getin.app"
resValue "string", "app_name", "GetIn"
resValue "string", "facebook_app_id", "5982**********"
resValue "string", "facebook_client_token", "d8f78c******************"
resValue "string", "fb_login_protocol_scheme", "fb*****************"
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.google.firebase:firebase-crashlytics'
}Here is the given error,
As the image, it shows error is on line number 42, in line number 42 it has this,
