session-android/res/layout/contact_selection_list_fragment.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             xmlns:app="http://schemas.android.com/apk/res-auto"
             xmlns:tools="http://schemas.android.com/tools"
             android:orientation="vertical">
    
    <android.support.v4.widget.SwipeRefreshLayout
            android:id="@+id/swipe_refresh"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:clipToPadding="false"
            android:scrollbars="vertical" />

        <TextView android:id="@android:id/empty"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center|center_vertical"
            android:layout_marginTop="15dp"
            android:text="@string/contact_selection_group_activity__finding_contacts"
            android:textSize="20sp" />

    </android.support.v4.widget.SwipeRefreshLayout>

    <org.thoughtcrime.securesms.components.RecyclerViewFastScroller
        android:id="@+id/fast_scroller"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:visibility="gone"
        android:layout_gravity="end"/>

    <LinearLayout android:id="@+id/show_contacts_container"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:orientation="vertical"
                  android:layout_gravity="center"
                  android:visibility="gone"
                  tools:visibility="visible">

        <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

            <com.pnikosis.materialishprogress.ProgressWheel
                    android:id="@+id/progress"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:visibility="invisible"
                    app:matProg_circleRadius="145dp"
                    app:matProg_barWidth="6dp"
                    app:matProg_rimColor="@color/signal_primary"
                    app:matProg_barColor="@color/signal_primary_dark"
                    app:matProg_progressIndeterminate="true"
                    tools:visibility="visible"
                    />

            <ImageView android:layout_gravity="center"
                       android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:src="@drawable/no_contacts"/>


        </FrameLayout>

        <TextView android:id="@+id/show_contacts_description"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_marginTop="20dp"
                  android:layout_marginLeft="50dp"
                  android:layout_marginRight="50dp"
                  android:textSize="15sp"
                  android:lineSpacingMultiplier="1.3"
                  android:gravity="center"
                  android:text="@string/contact_selection_list_fragment__signal_needs_access_to_your_contacts_in_order_to_display_them"/>

        <Button android:id="@+id/show_contacts_button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp"
                android:layout_gravity="center_horizontal"
                android:background="@color/signal_primary"
                android:textColor="@color/white"
                android:padding="10dp"
                android:text="@string/contact_selection_list_fragment__show_contacts"/>
    </LinearLayout>

</FrameLayout>