Class not found although particular jar is added in project (android to sqlserver without webservice)

Question

I am connecting android to SQLServer directly (I know its not recomended)

I have written following code:

public class MainActivity extends Activity {         


        

Answer 1

I have Sucessfully done the Connection with JTDC Android to SQLServer.

Whoever wants to make connection Direct to SQLServer with android should first remember that "This is not at all the secure way".

Steps I followed:

1. Remember, JDBC creates SSL problems, JTDC drivers are open source and secure. So use JTDC Drivers.

2. While using JTDC driver make sure that you are using it with proper version. i.e. JTDC drivers version should match or be confirtable with java version. I used jtds-1.2.5-dist you can get it from anywhere on net.

3. Paste Jar file to libs folder.

4. Go to Java Build Path (Right Click on project > Properties) In libraries > Add Externl jars. Import Jar file.

5. In Order And Export > Check on jtds jar as follows:

(other jars you are watching in pic are not useful)

6 You will have to set SQLServer Login Authentication (Windows Authentication for SQLServer) Screenshot as follows:

7 Configure your SQLServer as follows:

Make TCP/IP and VIA connection enabled.

In TCP/IP Properties Change The port to 1433

8 Then you will have to make Connection URL as:

url="jdbc:jtds:sqlserver://10.0.2.2:1433;instanceName=14GRAFICALI\MSSQLSERVER2008;DatabaseName="+DBName+";integratedSecurity=true;user="+UserName+";password="+Password;

9 From Here you can simply follow the code i give you:

public class gaConnection 
{
String url ="";
Connection conn=null;
Statement statement=null;
ResultSet resultSet=null;
    public void setConnection(String DBName,String UserName,String Password)
    {
        try {
            Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
            url ="jdbc:jtds:sqlserver://10.0.2.2:1433;instanceName=14GRAFICALI\\MSSQLSERVER2008;DatabaseName="+DBName+";integratedSecurity=true;user="+UserName+";password="+Password;
            conn =DriverManager.getConnection(url);
            } catch (Exception e) {
            e.printStackTrace();
            }
    }
    public String showResult()
    {
        String strResult="";
        try
        {
            statement=conn.createStatement();
            resultSet=statement.executeQuery("select * from UserMaster");
            while(resultSet.next()){
               strResult = strResult + " Name : "+resultSet.getString(1)+"  SirName : "+resultSet.getString(2) + "\n";
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        return strResult;
    }

}

10 I have made Class For Connection and instantiated it as follows:

 public class MainActivity extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            TextView tvData=(TextView)findViewById(R.id.tvSelectedData);

            String DBName="AndroidDB";
            String UserName="sa";
            String Password="ok";

            try {gaConnection con=new gaConnection();
                con.setConnection(DBName,UserName,Password);
                tvData.setText(con.showResult());
            } catch (Exception e) {
                e.printStackTrace();
                tvData.setText(e.getMessage());
            }

        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.main, menu);
            return true;
        }

    }

Answer 2

The error occurs because, during development, Eclipse ADT shows you the superset of the Android JRE and the Java SE JRE. XAConnection comes from the latter, not from the JDBC JARs you included.

However, on-device, Android only has its own runtime environment, which does not contain all classes from Java SE. It looks like XAConnection is one the missing ones.

To solve the problem you need to find a library that includes the missing classes required by the JDBC JARs (or make it yourself), or, better yet, use the recommended solution.

I recommend the latter, because I know from experience it can be a royal pain to accomplish the former.