Can We Connect To Sql Server From Android Application?

I am developing an application which is associated with a website. My application home screen contains login and register buttons. In user registration, all field values have to be

Solution 1:

On your website, I would create services that expose just the information you will need in your Android application. Never pass SQL strings. As Robin said, that's a major security issue. Then just consume these services in your app.

Solution 2:

That sounds like a security disaster waiting to happen. How are you going to prevent people doing unauthorised transactions against the database?

I don't know a single company that intentionally exposes their SQL database directly to the world, i.e. without forcing everything to go through a web interface.