habitica-android/Habitica/res/layout/dialog_habitica_base.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@color/white"
        android:paddingTop="@dimen/spacing_large"
        android:paddingBottom="@dimen/spacing_large"
        android:textSize="18sp"
        android:paddingLeft="@dimen/spacing_large"
        android:paddingRight="@dimen/spacing_large"
        tools:text="This is the title!"
        tools:background="@color/brand_300"
        />
    <TextView
        android:layout_marginTop="@dimen/spacing_large"
        android:id="@+id/subtitleTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@color/black"
        android:textSize="18sp"
        android:visibility="gone"
        android:layout_marginBottom="@dimen/spacing_small"
        tools:text="This is a subtitle"
        android:paddingLeft="@dimen/spacing_large"
        android:paddingRight="@dimen/spacing_large"
        tools:visibility="visible"/>
    <TextView
        android:id="@+id/messageTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:textColor="@color/black_50_alpha"
        android:textSize="14sp"
        android:visibility="gone"
        android:paddingLeft="@dimen/spacing_large"
        android:paddingRight="@dimen/spacing_large"
        tools:text="This is an example message"
        tools:visibility="visible"/>
</LinearLayout>