session-android/res/layout/share_activity.xml

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:wheel="http://schemas.android.com/apk/res-auto"
                xmlns:tools="http://schemas.android.com/tools"
                android:orientation="vertical"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

    <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_alignParentTop="true"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:minHeight="?attr/actionBarSize"
            android:background="@color/action_bar_background"
            android:elevation="0dp"
            android:theme="@style/Session.DarkActionBar">

        <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

            <TextView android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Share"
                      android:textColor="@color/white"
                      android:fontFamily="sans-serif-medium"
                      android:textSize="@dimen/very_large_font_size"
                      android:layout_alignParentStart="true"
                      android:layout_centerVertical="true"
                      android:layout_toStartOf="@+id/search_action"/>

            <ImageView android:id="@+id/search_action"
                       android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:src="@drawable/ic_search_white_24dp"
                       android:visibility="gone"
                       android:layout_alignParentEnd="true"
                       android:layout_centerVertical="true"/>

        </RelativeLayout>

    </androidx.appcompat.widget.Toolbar>


    <fragment android:id="@+id/contact_selection_list_fragment"
              android:layout_below="@id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:name="org.thoughtcrime.securesms.loki.fragments.ContactSelectionListFragment" />

    <org.thoughtcrime.securesms.components.SearchToolbar
            android:id="@+id/search_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:elevation="4dp"
            android:visibility="invisible"
            tools:visibility="invisible"/>

    <com.pnikosis.materialishprogress.ProgressWheel android:id="@+id/progress_wheel"
                                                    android:layout_width="70dp"
                                                    android:layout_height="70dp"
                                                    android:layout_centerInParent="true"
                                                    wheel:matProg_progressIndeterminate="true" />

</RelativeLayout>