Question

One or more layouts are missing the layout_width or layout_height attributes. These are required in most layouts.

Answer 1

One or more layouts are missing the layout_width or layout_height attributes

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

<DatePicker xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="wrap_parent"

android:layout_height="wrap_parent"

android:id="@+id/dialog_date_date_picker"

android:calendarViewShown="true">

</DatePicker>