ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo netInfo = cm.getActiveNetworkInfo();

    if (netInfo != null && netInfo.isConnectedOrConnecting()) {

        Toast.makeText(getApplicationContext(), "Conectado a Internet", Toast.LENGTH_SHORT).show();

    } else {

        Toast.makeText(getApplicationContext(), "No Conectado", Toast.LENGTH_SHORT).show();

    }

    Connection connection = null;
    String ConnectionURL, servidor, db, usuario, password;

    servidor = "192.168.0.10";
    db="ComercializacionYMarketing";
    usuario="sa";
    password="314159265";
    try {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

        Class.forName("net.sourceforge.jtds.jdbc.Driver");
        ConnectionURL = "jdbc:jtds:sqlserver://"+servidor+";databaseName="+db+";user="+usuario+";password="+password+";";
        connection = DriverManager.getConnection(ConnectionURL);
    } catch (SQLException se) {
        Log.e("bug", se.getMessage());
    } catch (ClassNotFoundException e) {
        Log.e("bug", e.getMessage());
    } catch (Exception e) {
        Log.e("bug", e.getMessage());
    }
}