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Editorial Team
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Asked: 2026-05-31T19:07:58+00:00

I’m trying to connecting SQL Azure from my android application. The code is working

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I’m trying to connecting SQL Azure from my android application. The code is working fine for Java application where I managed to fetch data from SQL Azure but it throws error for my android. Below is my code and error message.
Code: 

String connectionString =
                    "jdbc:sqlserver://serversql.database.windows.net:1433" + ";" +  
                "database=dbname    " + ";" + 
                "user=user@serversql" + ";" +  
                "password=password";
            Connection connection = null;  // For making the connection
            Statement statement = null;    // For the SQL statement 
            ResultSet resultSet = null;    // For the result set, if applicable 
        try
        {

            // Ensure the SQL Server driver class is available.
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");              
            // Establish the connection.
            connection = DriverManager.getConnection(connectionString);
            String filename = "SVPoster.jpg";
            String sql = "Select * from VoucherTable";
            statement = connection.createStatement();
            resultSet = statement.executeQuery(sql);
            int count;
            if(resultSet.next())
            {
                Blob test = resultSet.getBlob("Voucher"); 
                InputStream x=test.getBinaryStream();
                int size=x.available();
                OutputStream output = new FileOutputStream("/sdcard/"
                        + filename);
                byte data[] = new byte[1024];
                long total = 0;
                while ((count = x.read(data)) != -1) {
                    total += count;
                    output.write(data, 0, count);
                }
                output.flush();
                output.close();
                x.close();
            }               
        }
        catch (Exception ex)
        {
            Toast.makeText(getApplicationContext(), ex.toString(),
                     Toast.LENGTH_LONG).show();
        }

Error Message

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host server.database.windows.net, port 1433 has failed. Error: "null. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
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1 Answer

  1. Editorial Team

    Most likely this is because of the SQL Azure firewall. You will probably have to open up that for it to be used:

    https://msdn.microsoft.com/en-us/library/azure/jj553530.aspx

    Since you don’t know the IP addresses of Android apps, I would think the choices are:

    • Open the firewall up completely (start at 0.0.0.0 end at 255.255.255.255)
    • Create a WCF service that you can call from Android and give that access to the database, this is probably a better solution as it is also more secure.
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