SchildiChat-android/vector/src/main/res/layout/activity.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        style="@style/VectorToolbarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:elevation="4dp"
        app:layout_constraintTop_toTopOf="parent" />

    <FrameLayout
        android:id="@+id/container"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/toolbar" />

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/waiting_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?vctr_waiting_background_color"
        android:visibility="gone"
        tools:visibility="visible">

        <LinearLayout
            android:id="@+id/waiting_view_content"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/layout_horizontal_margin"
            android:background="?attr/colorBackgroundFloating"
            android:orientation="vertical"
            android:padding="@dimen/layout_horizontal_margin"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintWidth_percent="@dimen/dialog_width_ratio">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <ProgressBar
                    android:id="@+id/waiting_view_status_circular_progress"
                    android:layout_width="40dp"
                    android:layout_height="40dp"
                    android:layout_gravity="center_vertical"
                    android:layout_marginEnd="6dp"
                    android:layout_marginRight="6dp" />

                <TextView
                    android:id="@+id/waiting_view_status_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:textColor="?riotx_text_secondary"
                    android:visibility="gone"
                    tools:text="Waiting status..."
                    tools:visibility="visible" />

            </LinearLayout>

            <ProgressBar
                android:id="@+id/waiting_view_status_horizontal_progress"
                style="?android:attr/progressBarStyleHorizontal"
                android:layout_width="match_parent"
                android:layout_height="20dp"
                android:layout_marginTop="10dp"
                android:visibility="gone"
                tools:max="100"
                tools:progress="30"
                tools:visibility="visible" />

        </LinearLayout>

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>