Android: how to know file located in web server is modified?

Question

I am parsing Xml file located in web server and storing parsed data in to database. for my app I am using data from database. I need to parse the xml file only if the file i

Answer 1

Calculate the MD5 of the file. You can save the old one and compare it?

If you don't know how, check out this for example: Getting a File's MD5 Checksum in Java