Could not get unknown property 'navigationVersion'

Question

I am trying to import Android jetpack libraries into my project but I am getting this error while trying to do so.

The code I used to implement jetpack navigation library inside "build.gradle(module:app)" file

implementation "android.arch.navigation:navigation-fragment-ktx:$rootProject.navigationVersion"
implementation "android.arch.navigation:navigation-ui-ktx:$rootProject.navigationVersion"

Answer 1

Because You haven't defined that property. Set it in gradle.properties or change this $rootProject.navigationVersion to current version. Take a look here.