如何修复Android Studio无法加载BuildCancellationToken类错误

1. 修复gradle.properties语法错误 #

你的gradle.properties文件开头多了{、结尾多了}，这会直接导致Gradle解析配置失败。替换为以下正确内容：

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
# AndroidX package structure to make it clearer which packages are bundled with the
# Android operating system, and which are packaged with your app's APK
# https://developer.android.com/topic/libraries/support-library/androidx-rn
android.useAndroidX=true
# Kotlin code style for this project: "official" or "obsolete":
kotlin.code.style=official
# Enables namespacing of each library's R class so that its R class includes only the
# resources declared in the library itself and none from the library's dependencies,
# thereby reducing the size of the R class for that library
android.nonTransitiveRClass=true

2. 确保AGP与Gradle版本兼容 #

你当前使用Gradle 8.2，对应的Android Gradle Plugin（AGP）版本必须为8.2.x，版本不匹配是类加载错误的核心原因：

• 打开app/build.gradle.kts（或app/build.gradle）
• 修改plugins块中的AGP版本至匹配值，同时确保Kotlin版本与AGP兼容：

// Kotlin DSL示例
plugins {
    id("com.android.application") version "8.2.0"
    id("org.jetbrains.kotlin.android") version "1.9.0"
}

// Groovy DSL示例
plugins {
    id 'com.android.application' version '8.2.0'
    id 'org.jetbrains.kotlin.android' version '1.9.0'
}

3. 彻底清理Gradle缓存与守护进程 #

• 完全关闭Android Studio
• 删除Gradle缓存目录：Windows路径为C:\Users\你的用户名\.gradle\caches，直接删除整个caches文件夹
• 杀掉相关进程：
  • Windows：打开任务管理器，结束所有java.exe、javaw.exe、gradle.exe进程
  • Mac/Linux：终端执行killall java
• 重新打开Android Studio，点击工具栏的「Sync Project with Gradle Files」按钮

4. 重新下载Gradle分发包 #

如果Gradle包损坏，手动删除已下载的分发文件：

• 找到Gradle wrapper存储目录：Windows为C:\Users\你的用户名\.gradle\wrapper\dists\gradle-8.2-bin
• 删除该目录下的所有文件
• 回到Android Studio重新触发同步，Gradle会自动重新下载完整的8.2版本包

5. 验证SDK与Build Tools配置 #

• 打开SDK Manager，确认已安装Android SDK Build Tools 34.0.0（AGP 8.2.0对应版本）
• 检查local.properties中的sdk.dir路径是否正确，确保无拼写错误

内容的提问来源于stack exchange，提问作者Dewmini Chamodya