Flutter项目集成异常

[feer921]

1. Cannot run with sound null safety, because the following dependencies don't support null safety
2. 运行自己的 Flutter 项目为 Android APP,但报如下错误，是为何？ Execution failed for task ':app:checkDebugAarMetadata'.

   Could not resolve all files for configuration ':app:debugRuntimeClasspath'. Could not find q.rorbin:badgeview:1.1.3. Searched in the following locations:

   • https://dl.google.com/dl/android/maven2/q/rorbin/badgeview/1.1.3/badgeview-1.1.3.pom
   • https://repo.maven.apache.org/maven2/q/rorbin/badgeview/1.1.3/badgeview-1.1.3.pom
   • https://jitpack.io/q/rorbin/badgeview/1.1.3/badgeview-1.1.3.pom
   • https://dl.bintray.com/jenly/maven/q/rorbin/badgeview/1.1.3/badgeview-1.1.3.pom
   • https://storage.googleapis.com/download.flutter.io/q/rorbin/badgeview/1.1.3/badgeview-1.1.3.pom Required by: