material-dialogs/library/src/main/res/layout/md_dialog_progress_indeterminate.xml

<com.afollestad.materialdialogs.internal.MDRootLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:md_reduce_padding_no_title_no_buttons="false"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <include layout="@layout/md_stub_titleframe" />

    <include layout="@layout/md_stub_progress_indeterminate" />

    <include layout="@layout/md_stub_actionbuttons" />

</com.afollestad.materialdialogs.internal.MDRootLayout>