Hello everyone, I am trying to connect to a Microsoft Sql server from my android app. The problem is that every time I try to connect using DriverManager.getConnection, the app crashes because apparently some classes are missing in the .jar file: java.lang.RuntimeException: An error occured while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:300) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) at java.util.concurrent.FutureTask.setException(FutureTask.java:222)...