Is an aspiring android developer expected to know webframeworks to get a job

I am learning to be an android developer. Soon should be applying for jobs after I complete few projects on my own including one or two android native app using some public websites api (just enough to get the json data, parse it and use it in my app). I have some theoretical knowledge of spring mvc and struts frameworks and some hibernate but now worked on them practically.

1. Am I expected to know any webframeworks to be able to get a job?
2. If yes, how much?

Thank you for your help in advance!