android-apt & jack and jill

Question

Android Studio 2.2

Gradle Android Tools 2.2.0

Gradle Wrapper 2.14.1-all

I am using apt plugin to compile ButterKnife ( version 8.2.1 ) library and I want to use lambda with jack and jill support.

android apt plugin

apply plugin: 'android-apt'

android apt classpath

classpath "com.neenbedankt.gradle.plugins:android-apt:1.8"

if I am trying to enable jack toolchain

defaultConfig {
    ...

    // java 8 language support
    jackOptions {
        enabled true
    }
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

jack and apt together gives following error :

Error:Could not get unknown property 'classpath' for task ':app:transformJackWithJackForDebug' of type com.android.build.gradle.internal.pipeline.TransformTask.

if I am removing android-apt plugin, jack toolchain works great. so, what should we do to use these together ?

Answer 1

android-apt does not support Jack. As of the Android Gradle plugin version 2.2 I recommend to switch to the built in annotation support that also supports Jack. See this short guide on how to migrate from android-apt.