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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/toolbar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?android:attr/windowBackground"
        app:elevation="0dp">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?actionBarSize"
            android:background="@android:color/transparent"
            app:title="@string/ChooseNewAdminActivity_choose_new_admin"
            app:titleTextColor="@color/signal_text_primary" />

    </com.google.android.material.appbar.AppBarLayout>

    <FrameLayout android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_gravity="center"
        android:layout_weight="1"
        android:orientation="vertical">

        <org.thoughtcrime.securesms.groups.ui.GroupMemberListView
            android:id="@+id/choose_new_admin_group_list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:selectable="true"
            tools:listitem="@layout/group_recipient_list_item" />

        <com.dd.CircularProgressButton
            android:id="@+id/choose_new_admin_done"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|end"
            android:layout_marginEnd="16dp"
            android:layout_marginBottom="16dp"
            android:textColor="@color/white"
            app:cpb_colorIndicator="@color/white"
            app:cpb_colorProgress="?colorAccent"
            app:cpb_cornerRadius="28dp"
            app:cpb_selectorIdle="@drawable/progress_button_state"
            app:cpb_textIdle="@string/ChooseNewAdminActivity_done"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent" />

    </FrameLayout>

</LinearLayout>