How to use Data Binding and Kotlin in Android Studio 3.0.0

user_7101554 0
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I just started to use Android Studio 3.0.0, but every time I try to build my project I get this error:

Error:Circular dependency between the following tasks:
:app:compileDebugKotlin
+--- :app:dataBindingExportBuildInfoDebug
|    \--- :app:compileDebugKotlin (*)
\--- :app:kaptDebugKotlin
     \--- :app:dataBindingExportBuildInfoDebug (*)
(*) - details omitted (listed previously)

I am using 

kapt "com.android.databinding:compiler:2.2.0"

Before I was using 

androidProcessor "com.android.databinding:compiler:2.2.0"

And it was working just fine... What I am doing wrong??

Thanks!

android-studio-3.0 android-databinding kotlin android-studio android
4 Answers

It seems that you need 3 gradle entries in the app .gradle at module level to add data binding

  1. apply plugin: 'kotlin-kapt'
  2. android { ... dataBinding { enabled = true } }
  3. dependencies { ...... kapt "com.android.databinding:compiler:$compiler_version" }

Notice that I made compiler version a variable in the project level build gradle so it can be managed from a single place

default was: ext.kotlin_version = '1.1.3-2'

I added with bracket syntax:

ext{
    kotlin_version = '1.1.3-2'
    compiler_version = '3.0.0-beta6'
}
user_14470710

If you use Kotlin Gradle plugin 1.3 and higher, you do not need to specify kapt "com.android.databinding:compiler:$plugin_version"

https://youtrack.jetbrains.com/issue/KT-32057

It is enough to specify dataBinding in your build.gradle file:

android {
    ...
    dataBinding {
        enabled = true
    }
}

or

android {
    ...
    buildFeatures {
        dataBinding true
    }
}
user_153288220
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