MainActivity.kt

import android.databinding.DataBindingUtil
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import com.processmap.databindingexample.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity() {

    private var mBinding: ActivityMainBinding? = null   //This ActivityMainBinding class is auto generated by data binding library for us


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        mBinding=DataBindingUtil.setContentView(this,R.layout.activity_main) //Setting contentview usind data binding.
        mBinding?.txtView?.setText("Hello!") //Accessing textview using mbinding


    }
}