Kotlin Article: MainActivity.kt with Android Extensions

MainActivity.kt

// Using R.layout.activity_main
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
         // Instead of findView(R.id.toolbar) as Toolbar
        setSupportActionBar(toolbar)
    }
}