ActivityMain.kt

package com.example.fabio.databind

import android.databinding.DataBindingUtil
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import com.example.fabio.databind.databinding.ActivityMainBinding


class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding : ActivityMainBinding = DataBindingUtil.setContentView(this,
                R.layout.activity_main)
        var user : Person = Person("Fabio", 29)
        binding.user = user
    }
}