phonegap-facebook-plugin/platforms/android/FacebookLib/res/layout/com_facebook_login_activity_layout.xml

The official Facebook plugin for Apache Cordova/PhoneGap

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <ProgressBar android:indeterminate="true"
                 android:layout_width="wrap_content"
                 android:layout_height="50dip"
                 android:id="@+id/com_facebook_login_activity_progress_bar"
                 android:layout_centerInParent="true"
                 android:visibility="gone"
                 android:indeterminateOnly="true"
            />
</RelativeLayout>