Signal-Android/app/src/main/res/layout/media_overview_item_header.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/signal_background_primary"
    android:minHeight="48dp"
    android:paddingTop="16dp"
    android:paddingBottom="12dp">

    <TextView
        android:layout_marginStart="@dimen/dsl_settings_gutter"
        android:layout_marginEnd="@dimen/dsl_settings_gutter"
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textAppearance="@style/TextAppearance.Signal.Body1.Bold"
        android:textStyle="bold"
        tools:text="March 1, 2015" />
</FrameLayout>