flutter 1

* What went wrong:

Execution failed for task ':app:checkDebugDuplicateClasses'.

> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.

  > Could not download arm64_v8a_debug.jar (io.flutter:arm64_v8a_debug:1.0.0-540786dd51f112885a89792d678296b95e6622e5)

maven{ url"http://download.flutter.io" }