import android.view.View

import org.jetbrains.anko.*

import org.jetbrains.anko.sdk25.coroutines.onClick

class MainActivityUI : AnkoComponent<MainActivity> {

    override fun createView(ui: AnkoContext<MainActivity>): View = with(ui) {

        verticalLayout {

            padding = dip(10)

            var name = textView("Hello World") {

                padding = dip(10)

            }

            button("更换文字") {

                onClick { name.text = "Anko Demo" }

            }

        }

    }

}

import android.os.Bundle

import android.support.v7.app.AppCompatActivity

import org.jetbrains.anko.setContentView

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        MainActivityUI().setContentView(this)

    }

}