space-android/res/drawable/actionbar_progress_indeterminate_horizontal.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:oneshot="false">
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_1" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_2" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_3" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_4" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_5" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_6" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_7" android:duration="50" />
    <item android:drawable="@drawable/owncloud_progressbar_indeterminate_8" android:duration="50" />
</animation-list>