too many bug at different gradle version

[lozn00]

gradle 7.0 ,databindutil not exist ,unless use

//    implementation 'androidx.databinding:library:3.2.0-alpha11'
//    implementation 'androidx.databinding:databinding-runtime:7.0.0'

and tip need set { databinding true} but i delete xml everything is ok!

[lozn00]

use gradle 4.2 tip Could not find androidx.databinding:viewbinding:4.2.0.

[lozn00]

//Could not find androidx.databinding:viewbinding:4.2.0.
implementation 'androidx.databinding:databinding-common:4.1.3'

// implementation 'androidx.databinding:library:3.2.0-alpha11' // implementation 'androidx.databinding:databinding-runtime:7.0.0'

can you introducde it how to work ,this library

[lozn00]

why so set

    buildFeatures{
        dataBinding {
            enabled = true
        }
    }

not find databindutil, and util

[lozn00]

ndroid.databinding.tool.processing.ScopedException: [databinding] {"msg":"Found \u003clayout\u003e but data binding is not enabled.\n\nAdd buildFeatures.dataBinding \u003d true to your build.gradle to enable it.","file":"C:\\project\\SoTrun\\app\\src\\main\\res\\layout\\fragment_my.xml","pos":[]}
	at android.databinding.tool.util.L.tryToThrowScoped(L.java:98)

distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
        classpath "com.android.tools.build:gradle:7.0.0"

build.grade enable =true has set, problem is set xml node cause error