Incompatible classes error on Android

[sinhpn92]

Hi team,
I have an issue on Android.
I got the error:

e: Incompatible classes were found in dependencies. Remove them from the classpath or use '-Xskip-metadata-version-check' to suppress errors
e: .../.gradle/caches/transforms-2/files-2.1/185d46b6321985f52dcc07c04b9e0199/jetified-kotlin-stdlib-common-1.5.31.jar!/META-INF/kotlin-stdlib-common.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15.
...

...
e: .../.pub-cache/hosted/pub.dartlang.org/nsd_android-1.0.3/android/src/main/kotlin/com/haberey/flutter/nsd_android/NsdAndroidPlugin.kt: (15, 27): Unresolved reference: HashMap
...

What's wrong there? Have any ideal to help fix this issue? Thank you so much.

[sebastianhaberey]

Hi @sinhpn92

I've never seen this before. Since the integration test passes on the latest version, my first guess would be that it's something in your environment. I may be wrong, of course. Try running flutter clean in your project.

What are you trying to do? Are you using the plugin via dependency, or are you trying to build it from source?

[sebastianhaberey]

Also, if you're using Android Studio, try menu > File > Invalidate Caches / Restart.

[sinhpn92]

Thank you @sebastianhaberey ,
I fixed this issue. Cause by the root project gradle. It's used implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version". I change to implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version".

Now It's solved.