I Suppose you must have used SQL Server JDBC Driver to connect to the SQL Server. This is not really a good way to communicate with the database from a mobile device. Connecting in this manner will actually expose your database over internet, which you may not really want. Suggest you to create simple web services (SOAP Or REST) and access those from the device. For REST+JSON services you can use
class available in Android SDK. You can even search
] this very site to find some interesting articles describing this scenario.
Assuming that you still want to continue with the JDBC approach then where is the problem. You can always use Statement/PreparedStatement classes to fire your INSERT/UPDATE SQL's to get the job done.