ClassNotFoundException: Didn't find class “android.databinding.DataBinderMapper”

Question

I am using android\'s data binding library for views in a library project

i have added the following line in my root gradle file

classpath \'         


        

Answer 1

classpath 'com.android.databinding:dataBinder:1.0-rc1'

apply plugin: 'com.android.databinding'

Remove that lib. from gradle.

Answer 2

Best guess. Get rid of android-apt

And if there are libraries using apt

Instead of apt 'lt.mdm.sdd:myLib:1.5.1' use annotationProcessor 'lt.mdm.sdd:myLib:1.5.1'.

I'm not sure if this will help you, and i have no idea if library it self should be changed.

It helped me (i was using androidannotations.org older version with apt) at least.

Update

And i have no idea why you apply plugin: 'com.android.databinding'? It works without it as well.

Answer 3

Get inspiration from @Bolein95 say.Because it depend on a library that does not support androidx(no setting databinding=true),Written by a colleague who has left.I copy a few necessary files from his github repo, it work!

Answer 4

Besides adding the following to build.gradle:

android {
    dataBinding {
        enabled = true
    }
}

I also have to add the following dependency:

dependencies {
    kapt 'com.android.databinding:compiler:3.0.1'
}

Answer 5

finally i was able to solve this issue. It seems there was a conflict between apt version of the app and library modules.

upgraded the apt version in the app to

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

Answer 6

The new way of adding DataBinding is by adding on the build.gradle of all your modules:

android {
...

  buildFeatures {
    dataBinding true
  }
}

Don't forget to add also the kotlin-kapt plugin at the top:

plugins {
  ...
  id 'kotlin-kapt'
}