Flutter升级到2.10后无法编译的错误解决方案：The minCompileSdk (31) specified in a compileSdkVersion (android-30).

最近升级了Flutter到2.10版本，发现无法编译，错误如下，然后安装了Android SDK31也依然无法解决，通过研究网络上的方案，解决如下：

1，升级Gradle到7.4.2，在VScode终端运行gradle init重建gradle环境（因为项目在升级前建立，gradle版本是6.2）,。

2，修改项目下面的Android目录下面的build.gradle 里面的 ext.kotlin_version = '1.6.20'到最新版本。

3，修改项目目录下面APP里面的build.gradle里面的 targetSdkVersion 31好像没有意义，30,31都没有问题。

4，没有修改flutter\packages\flutter_tools\gradle\flutter.gradle文件，因为里面已经是31版本了。

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错误信息：

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:checkReleaseAarMetadata'.
> Multiple task action failures occurred:
   > A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction
      > The minCompileSdk (31) specified in a
        dependency's AAR metadata (META-INF/com/android/build/gradle/aar-metadata.properties)
        is greater than this module's compileSdkVersion (android-30).
        Dependency: androidx.window:window-java:1.0.0-beta04.
        AAR metadata file: C:\Users\Administrator\.gradle\caches\transforms-2\files-2.1\625039eaad011f884ddd84f857a44b7f\jetified-window-java-1.0.0-beta04\META-INF\com\android\build\gradle\aar-metadata.properties.
   > A failure occurred while executing com.android.build.gradle.internal.tasks.CheckAarMetadataWorkAction

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 3s
Running Gradle task 'assembleRelease'...                            4.1s
Gradle task assembleRelease failed with exit code 1

 把kotlin的版本修改为最新版：1.6.20

 https://kotlinlang.org/docs/gradle.html#plugin-and-versions

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