android.DataBindingUtil

import android.databinding.DataBindingUtil
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import org.jetbrains.anko.act
import org.niray.imdemo.databinding.ActivityMainBinding

@Suppress("MISSING_DEPENDENCY_CLASS")
class MainActivity : AppCompatActivity() {

    val mBean by lazy {
        DataBean().apply {
            userName.set("苏州独墅湖")
            userAge.set(System.currentTimeMillis().toInt())
        }
    }
    val binder by lazy { DataBindingUtil.setContentView<ActivityMainBinding>(act, R.layout.activity_main) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binder.userBean = mBean
        postD()
    }

    fun postD() {
        window.decorView.postDelayed(object : Runnable {
            override fun run() {
                mBean.userName.set("I'm From Delayed")
                mBean.userAge.set(System.currentTimeMillis().toInt())
                binder.userBean = mBean
                postD()
            }
        }, 1234)
    } 
}

<?xml version="1.0" encoding="utf-8"?>
<layout>

    <data>

        <variable
            name="userBean"
            type="org.niray.imdemo.DataBean" />
    </data>

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/activity_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        tools:context="org.niray.imdemo.MainActivity">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@{String.valueOf(userBean.userAge)}" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@{userBean.userName}" />

    </LinearLayout>
</layout>

http://www.jianshu.com/p/14281500bd74
http://kovenant.komponents.nl/android/features/
dependencies {
    // ...
    kapt 'com.android.databinding:compiler:2.2.0'//改为对应版本
}
kapt {
    generateStubs = true
}
   val binding = DataBindingUtil.setContentView<ActivityDataBindingBinding>(act, R.layout.activity_data_binding)
    @Suppress("MISSING_DEPENDENCY_CLASS")
     binding.userbean = UserBean("Grubby", "38")