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

I had the same problem after performing the migration androdx. I tried all the above methods but not resolved. I suddenly found that I used com.android.tools.build:gradle version is 3.3. I update it to 3.5. Problem is solved.

project build.gradle: classpath 'com.android.tools.build:gradle:3.3.0' Update to classpath 'com.android.tools.build:gradle:3.5.0' Redo the migration.

Answer 2

I had the same problem, but I solved it removing

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

from the global build.gradle and removing

apply plugin: 'android-apt'

from the local build.gradle, then it worked like a charm.

It seems it was a mixed problem with Butterknife too. Pretty weird.

Answer 3

Make sure that ALL your modules that use DataBinding have it enabled. This was the reason I got that exception.

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