flutter 版本升级问题

升级flutter版本到2.8.0，运行报错：

错误一：gradle\caches\transforms-2\files-2.1\1d0ad49d90f8984462d07510174740fe\core-1.7.0\res\values\values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.

具体代码

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:checkDebugAarMetadata'.
> 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.core:core-ktx:1.7.0.
        AAR metadata file: C:\Users\.gradle\caches\transforms-2\files-2.1\bac36abaa397e24c797fa6fd6ff183e0\jetified-core-ktx-1.7.0\META-INF\com\android\build\gradle\aar-metadata.properties.  
   > 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.core:core:1.7.0.
        AAR metadata file: C:\lisir\.gradle\caches\transforms-2\files-2.1\e596bd84a87a4cbdcf9d545f7eacbd1e\core-1.7.0\META-INF\com\android\build\gradle\aar-metadata.properties.

* 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

解决方法一

  compileSdkVersion 31

以及

    defaultConfig {
        applicationId "com.example.app"
        minSdkVersion 23
        targetSdkVersion 31
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

解决方法二：网上说是，可以在工程中app/build.gradle中的dependencies上面添加以下代码解决：

configurations.all {
    resolutionStrategy {
        force 'androidx.core:core-ktx:1.6.0'
    }
}

感觉很麻烦

错误二：Duplicate class androidx.lifecycle.DefaultLifecycleObserver found in modules lifecycle-common-2.4.0.jar (androidx.lifecycle:lifecycle-common:2.4.0) and lifecycle-common-java8-2.2.0.jar (androidx.lifecycle:lifecycle-common-java8:2.2.0)

具体代码

FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:checkDebugDuplicateClasses'.
> 1 exception was raised by workers:
  java.lang.RuntimeException: Duplicate class androidx.lifecycle.DefaultLifecycleObserver found in modules lifecycle-common-2.4.0.jar (androidx.lifecycle:lifecycle-common:2.4.0) and lifecycle-common-java8-2.2.0.jar (androidx.lifecycle:lifecycle-common-java8:2.2.0)
  Go to the documentation to learn how to <a href="d.android.com/r/tools/classpath-sync-errors">Fix dependency resolution errors</a>.
* 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

解决方式：在build.gradle中添加依赖

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.lifecycle:lifecycle-common-java8:2.4.0'
}