Android lambda exceptions for client

[hakangs]

Expected behavior

I have an android app, in which I have added Pulsar Client with gradle. It compiles fine with these additional settings in build.gradle file:

jackOptions {
    enabled true
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

Actual behavior

But when I run the app, I get the following exceptions and it fails:

Error:ChannelManager.java:363-364: Lambda coming from jar file need their interfaces on the classpath to be compiled, unknown interfaces are io.netty.util.concurrent.GenericFutureListener
Error:NettyReactiveStreamsBody.java:113-114: Lambda coming from jar file need their interfaces on the classpath to be compiled, unknown interfaces are java.lang.Runnable
Error:AsyncHttpClientConfigHelper.java:65-66: Lambda coming from jar file need their interfaces on the classpath to be compiled, unknown interfaces are java.util.function.Function
Error:AsyncHttpClientConfigDefaults.java:86-87: Lambda coming from jar file need their interfaces on the classpath to be compiled, unknown interfaces are java.util.function.IntFunction

How can we reproduce the issue

Can it be because Android does not accept lambdas by default ? How can I achieve Pulsar Client to run in Android ?

Is there a 1.7 version compiled version of client jars ?

System configuration

Pulsar version: 1.16

[agarman]

Have you considered using the WebSocket client?

It'll be simpler than getting a bunch of Java 8 libraries to work (stably) in Dalvik.

[sijie]

the minimal requirement for java is java8. and there is a websocket proxy, so you can use websocket api.