Hello,
Maybe this helps.
IMPORTANT: Before uploading to Google Play
In SampleProject\Plugins\ARToolkitPlugin\Source\ARToolkitPlugin\ARToolkitPlugin_APL.xml locate this line:
String obbPath = Environment.getExternalStorageDirectory() + “/obb/”; Change it to: String obbPath = Environment.getExternalStorageDirectory() + “/Android/obb/”;