Flutter 使用 Geolocation 插件编译时出错

编译包含Geolocator pluggin的项目时收到当前错误:

C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\geolocator_android-2.0.0\android\src\main\java\com\baseflow\geolocator\location\LocationMapper.java:29: error: cannot find symbol
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                                                    ^
  symbol:   variable S
  location: class VERSION_CODES
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\geolocator_android-2.0.0\android\src\main\java\com\baseflow\geolocator\location\LocationMapper.java:30: error: cannot find symbol
      position.put("is_mocked", location.isMock());
                                        ^
  symbol:   method isMock()
  location: variable location of type Location
2 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':geolocator_android:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

我已经创建了另一个项目来测试错误是否会发生，并且在导入包时也会发生错误.我遵循gradle.properties配置 并设置编译SdkVersion为30，并判断Flutter doctor ，一切正常，但错误仍然存在.有人知道这可能是什么原因吗？