How can I decode a file and get its content to my Android app?

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http://androidforums.com – Hi! I'm beginner in Android programming and I'm working on an Android app, that connects to a .crl file on the Internet and gets some data from it. I need to be able to decode this file (like the ASN.1 JavaScript decoder) and then use the decoded data. My question is, how can I access the decoded data from my Android app? Is there some way to reference the decoded text online? Or is there a way, to include the decoder in my Android app? Thanks for helping. (General)