add

frontend/app/android/settings.gradle.kts

@@ -10,6 +10,9 @@ pluginManagement {
     includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
 
     repositories {
+        // 👇 添加这一行，用于下载 Flutter 插件相关的依赖
+        maven { url = uri("https://storage.flutter-io.cn/download.flutter.io") }
+
         maven { url = uri("https://maven.aliyun.com/repository/google") }
         maven { url = uri("https://maven.aliyun.com/repository/public") }
         gradlePluginPortal()
@@ -21,6 +24,9 @@ pluginManagement {
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.PREFER_SETTINGS)
     repositories {
+        // 👇 添加这一行，这是解决你报错的核心！强制项目从这里下载 Flutter 引擎
+        maven { url = uri("https://storage.flutter-io.cn/download.flutter.io") }
+
         maven { url = uri("https://maven.aliyun.com/repository/google") }
         maven { url = uri("https://maven.aliyun.com/repository/public") }
         gradlePluginPortal()
@@ -31,8 +37,10 @@ dependencyResolutionManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.1.1" apply false
-    id("org.jetbrains.kotlin.android") version "1.8.22" apply false
+    // 👇 升级到 8.2.1 修复 Java 21 兼容性 bug
+    id("com.android.application") version "8.2.1" apply false
+    // 👇 顺便把 Kotlin 版本也稍微升一下，避免后续出现旧版本警告
+    id("org.jetbrains.kotlin.android") version "1.9.22" apply false
 }
 
 include(":app")