I have a c# win app that works with SQL. I want to develop an Android app that sends a query to win app and query result return to Android app. I didn't develop any android app.
1.Is there any way that I connect to my SQL database directly?
2.How send info from android app to PC?
3.How detect android device from win app?
You need to create Web Services and call them from your android app. Please have a look at this link which will give you information on calling webservices in android How to call a RESTful web service from Android?