The latest Flutter versions now utilize Gradle 8 or higher, which means Flutter plugins need to be updated to support these newer requirements. Since not all plugins immediately reflect the latest update demands, developers need a solution to address plugins that haven’t yet adopted these new requirements.
It’s said that you can implement a feature to automatically add the namespace required by Gradle 8 by simply adding the following code to your android/build.gradle file.
subprojects {
afterEvaluate { project ->
if (project.hasProperty("android")) {
project.android { // <- 여기가 31번째 줄 근처일 가능성이 높습니다.
if (namespace == null) {
// 기본값으로 group을 사용하거나, 특정 문자열을 지정할 수 있습니다.
// 하지만 각 모듈의 특성에 맞는 고유한 namespace를 지정하는 것이 원칙입니다.
namespace project . group // 예시: 'com.example' // <- 여기가 38번째 글자 근처일 수 있습니다.
// 또는 namespace "com.example.defaultnamespace"
}
}
}
}
}However, an error occurred. So, I wondered if it was because it was a Kotlin file (build.gradle.kts), and I tried converting it to Kotlin code as shown below.
subprojects {
afterEvaluate { project: Project ->
if (project.hasProperty("android")) {
println("DEBUG: Project ${project.name} has android property.") // 디버깅 출력
val androidExt =
project.extensions.findByType(com.android.build.gradle.BaseExtension::class.java)
if (androidExt != null) {
println("DEBUG: Android extension found for ${project.name}.")
if (androidExt.namespace == null) {
val defaultNamespace =
project.group?.toString() ?: "com.example.default.${project.name}"
println("INFO: Module ${project.name} has no namespace. Setting to '$defaultNamespace'")
androidExt.namespace = defaultNamespace
}
} else {
println("DEBUG: Android extension NOT found for ${project.name}.")
}
}
}
}But… it still resulted in an error.
“Type mismatch: inferred type is (Project) -> Unit but Closure<(raw) Any!>! was expected”
After quite a bit of searching here and there, I finally found the solution code below. Instead of using afterEvaluate, this method directly modifies the Android extension as each project is configured.
subprojects {
// 이 블록은 각 하위 프로젝트가 구성될 때 실행됨
// Android 플러그인이 적용되었는지 확인 후 작업 수행
project.plugins.withId("com.android.base") {
// "com.android.base"는 "com.android.application" 및 "com.android.library"의 기본 플러그인 ID
try {
val androidExtension = project.extensions.getByType(com.android.build.gradle.BaseExtension::class.java)
if (androidExtension.namespace == null) {
val defaultNamespace = project.group?.toString() ?: "com.example.default.${project.name}"
println("INFO (withId): Module ${project.name} has no namespace. Setting to '$defaultNamespace'")
androidExtension.namespace = defaultNamespace
}
} catch (e: Exception) {
println("WARN (withId): Could not configure namespace for ${project.name}: ${e.message}")
}
}
}Summary
I had a real headache trying to use the Isar NoSQL Database plugin. It’s been a while since I had such a throbbing headache, but now that it’s finally resolved, I feel so relieved. The headache is gone too. 🙂
Reference
2025.05.28 – [분류 전체보기] – Flutter 기본 기능 | as, show, hide | 변수나 함수, 클래스명이 같은 경우 해결 방법 | example
