java.lang.NoClassDefFoundError in API Level 23 (Android 6)

[sharafat]

I'm using Kohttp with AndroidAnnotations. For debug builds, I'm using MultiDex and for release builds, I'm disabling MultiDex and enabling ProGuard and Shrinking.

Everything is working fine on Android 8 and 9 devices. However, for Android 4.4 and 6 devices, I'm getting the following error when doing a post request:

java.lang.NoClassDefFoundError: io.github.rybalkinsd.kohttp.dsl.context.HeaderContext$sam$java_util_function_BiConsumer$0
        at io.github.rybalkinsd.kohttp.dsl.context.HeaderContext.forEach$kohttp(HeaderContext.kt:20)
        at io.github.rybalkinsd.kohttp.dsl.context.HttpContext.makeHeaders(HttpContext.kt:50)
        at io.github.rybalkinsd.kohttp.dsl.context.HttpContext.makeRequest(HttpContext.kt:38)
        at io.github.rybalkinsd.kohttp.dsl.HttpPostDslKt.httpPost(HttpPostDsl.kt:48)
        at com.eximusedu.app.service.Service.login(Service.kt:62)
        at com.eximusedu.app.LoginActivity.doLogin(LoginActivity.kt:137)
        at com.eximusedu.app.LoginActivity_.access$101(LoginActivity_.java:35)
        at com.eximusedu.app.LoginActivity_$5.execute(LoginActivity_.java:162)
        at org.androidannotations.api.BackgroundExecutor$Task.run(BackgroundExecutor.java:400)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:154)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
        at java.lang.Thread.run(Thread.java:833)

What could possibly the issue here? Thanks.

[rybalkinsd]

Hi @sharafat, thanks for submitting this issue. From the very first glance - it's a result of having jvmTarget=1.8 https://github.com/rybalkinsd/kohttp/blob/master/build.gradle.kts#L29

Probably, we can have separate build for 1.6

[rybalkinsd]

cc @IVSivak

[sharafat]

Hi @rybalkinsd, thanks for your reply. I'm already using Java 8 for compiling my android app:

android {
   compileOptions {
        targetCompatibility = "8"
        sourceCompatibility = "8"
    }
}

If specifying kotlinOptions.jvmTarget = "1.8" helps, then what's the syntax for including it in my build file? Or if including it doesn't help, is there any workaround I can use?

[rybalkinsd]

@sharafat is it possible to share your project somehow (either public/ or private repo)? or anything minimal where I can reproduce this bug?

[sharafat]

@rybalkinsd sure, thanks. I've added you to our private Bitbucket repository.

[govorovsky]

Hello. The issue is that the code in HeaderContext is calling Java 8 method Map.forEach()(which is unavailable on older Android versions) instead of Kotlin's Map.forEach. Details are here

[rybalkinsd]

Hi @govorovsky . Thanks for your PR!

[rybalkinsd]

fix will be available in 0.11.1