<?xml version="1.0" encoding="utf-8"?> <layout xmlns:app="http://schemas.android.com/apk/res-auto"> <data> <variable name="mainViewModel" type="keijumt.devandroid.viewmodel.MainViewModel" /> </data> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/btn_start_api" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="@{() -> mainViewModel.startApi()}" android:text="api" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/btn_start_asyn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="@{() -> mainViewModel.startAsync()}" android:text="async" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@id/btn_start_api" /> </android.support.constraint.ConstraintLayout> </layout>