linphone-android/app/src/main/res/layout/chat_ephemeral.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/top_bar"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:background="?attr/lighToolbarBackgroundColor"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/back"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.2"
            android:background="?attr/button_background_drawable"
            android:padding="18dp"
            android:src="@drawable/back" />

        <TextView
            style="@style/toolbar_small_title_font"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.6"
            android:gravity="center"
            android:padding="15dp"
            android:ellipsize="end"
            android:singleLine="true"
            android:text="@string/chat_room_ephemeral_fragment_title" />

        <ImageView
            android:id="@+id/valid"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.2"
            android:background="?attr/button_background_drawable"
            android:padding="18dp"
            android:src="@drawable/valid" />

    </LinearLayout>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/top_bar">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:orientation="vertical">

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:adjustViewBounds="true"
                android:layout_marginTop="20dp"
                android:layout_marginBottom="20dp"
                android:src="@drawable/ephemeral_messages_default" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                style="@style/chat_room_ephemeral_desc_font"
                android:gravity="center"
                android:layout_marginBottom="20dp"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:text="@string/chat_room_ephemeral_messages_desc"/>

            <View
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:layout_alignParentBottom="true"
                android:background="?attr/dividerColor" />

            <LinearLayout
                android:id="@+id/items"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical" />

        </LinearLayout>

    </ScrollView>

</RelativeLayout>