如何将主活动类中资源文件夹中的数据解析为android中的数据类？

I'm creating a android app that parses data from an xml file located in the resources folder in the main activity class, I am then storing this data to arrays and trying to send this data to a data class where the arrays of parsed data are assigned an object array. I'm getting null pointers but no errors. I'm new to this, any help would be greatly appreciated.I'm creating a android app that parses data fro