Data-Binding fails with "couldn't make a guess"
Its because of you class name or package name which use databinding. These class( which use databinding) have to start with capital word and packages start with lowercase.
Had a similar problem. Solved by renaming the data class by starting with capital letters.
these settings in the gradle.properties
do enable the androidx
data-binding compiler:
android.databinding.enableV2 = false
android.enableExperimentalFeatureDatabinding = true
one can see that by the fetched package:
Download https://dl.google.com/dl/android/maven2/androidx/databinding/databinding-compiler/3.2.0/databinding-compiler-3.2.0.pom
Download https://dl.google.com/dl/android/maven2/androidx/databinding/databinding-compiler/3.2.0/databinding-compiler-3.2.0.jar
and it complains:
WARNING: The option setting 'android.databinding.enableV2=false' is experimental and unsupported.
The current default is 'true'
WARNING: The option setting 'android.enableExperimentalFeatureDatabinding=true' is experimental and unsupported.
The current default is 'false'
most likely androidx.fragment.app.Fragment
instead of android.support.v4.app.Fragment
would be required, in order to data-bind a Fragment
with the default v2 data-binding compiler. this is also just a temporary solution - but still better than to revert to the v1 data-binding compiler.
Update:
Since com.android.tools.build:gradle:3.5.0
the above workaround does not work anymore; One has to refactor the XML files. It works best when not adding any class=""
attribute into the <data />
tag - and also adding this tag into any existing <layout>
tag. Duplicate id
on data-bound <include>
tags may also prevent the generation (the id
has to be set on the <include>
tag, not in the included layout).