session-android/res/layout/media_preview_activity.xml

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/gray95">

    <ImageView android:id="@+id/image"
               android:layout_width="match_parent"
               android:layout_height="match_parent"
               android:contentDescription="@string/media_preview_activity__image_content_description"
               android:visibility="gone"/>

    <TextView android:id="@+id/loading_indicator"
                 android:layout_width="50dp"
                 android:layout_height="50dp"
                 android:layout_centerInParent="true"
                 android:text="···"
                 android:textSize="30sp"
                 android:textColor="@color/gray10"
                 android:visibility="gone"
                 tools:ignore="HardcodedText" />

    <TextView android:id="@+id/error"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_centerInParent="true"
              android:background="#ff600000"
              android:textColor="#ffffffff"
              android:textSize="15sp"
              android:padding="10dp"
              android:visibility="gone" />

</RelativeLayout>