activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.tuanchauict.parselistloaderexample.MainActivity"
    android:orientation="vertical"
    android:gravity="center"
    >

    <Button
        android:id="@+id/create_1000_objects"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Create 1000 objects"
        />

    <Button
        android:id="@+id/goto_list_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="List View Demo"
        />
    <Button
        android:id="@+id/goto_viewpager"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ViewPager Demo"
        />
    <Button
        android:id="@+id/goto_recycler_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Recycler View Demo"
        />

</LinearLayout>