layout_progress_bar_with_text.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:gravity="center"
        android:orientation="vertical"
        android:background="#CCFFFFFF"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <ProgressBar
            android:id="@+id/progressBar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

    <TextView
            android:id="@+id/pbText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:gravity="center"
            android:textColor="@color/colorPrimary"
            android:layout_marginTop="@dimen/layout_padding_8dp"
            android:text="Please wait ..."/>

</LinearLayout>

Good