tools/layoutlib/bridge/tests/res/testApp/MyApplication/src/main/res/layout/layout.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Some text"/>
    <DatePicker
        android:layout_width="100dp"
        android:layout_height="100dp"/>
    <CalendarView
        android:layout_width="100dp"
        android:layout_height="100dp"/>
</LinearLayout>