j2me application doesn't work on Mobile Phone

Question

I have developed one simple application in J2ME. Application just do simple HttpConnection and make only request. Here is the code for that :

 public void run() {
    System.out.println("Inside saveData");
    HttpConnection hc = null;
    OutputStream dout = null;
   try {
        System.out.println("custName = " + custName);
        System.out.println("prodName = " + prodName);
        System.out.println("qty = " + qty);

        hc = (HttpConnection) Connector.open("http://www.sufalamtech.com/demo/mobile/test.php?custName=" + custName + "&prodName=" + prodName + "&qty=" + qty);
        //hc = (HttpConnection) Connector.open("http://www.sufalamtech.com/demo/mobile/test.php?custName=Custtt51&prodName=Proddd52&qty=53");
        //hc = (HttpConnection) Connector.open("http://www.sufalamtech.com/demo/mobile/test.php?custName="+custName+"&prodName="+prodName+"&qty="+qty);

        hc.setRequestProperty("User-Agent", "Profile/MIDP-2.1 Configuration/CLDC-1.1");
        hc.setRequestMethod(HttpConnection.GET);
        dout = hc.openOutputStream();

    } catch (Exception e) {
        System.out.println("Error... = " + e);
    } finally {
        try {
            if (dout != null) {
                dout.close();
            }

            if (hc != null) {
                hc.close();
            }
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    }

This works fine in PC (simulator). But when i am deploying .jar file on my Nokia 5310, it is not returning anything from HttpConnection.

Actually i don't want to receive any data from URL. I just wanna send request to my URL. Else will be done by that URL only... My Application is works fine in Nokia 3110 Classic. But not working on Nokia 5310. Do you have any suggestion plz ?

Thanks...

Answer 1

You need to use the input stream of the connection, not the output stream. Somehting like this (untested).

    if (hc.getResponseCode() == HttpConnection.HTTP_OK) {
        int length = (int)hc.getLength();
        InputStream is = hc.openInputStream();
        content = new byte[length];
        int read = 0;
        while (read < length) {
            int r = is.read(content, read, length - read);
            if (r < 0) {
                break;
            }
            read += r;
        }
        is.close();
    }
    hc.close();

Answer 2

The problem is that on some implementations, your application might not even send the request until you have invoked the connection.getResponseCode() method. Try invoking the getResponseCode() method before opening the InputStream or OutputStream

Answer 3

I have the same problem on Nokia E Series (E51) the code works perfectly in the Sun Simulator , however try setting your application/MIDlets defalut access point in the Application Manager this might slove your problem. Go to Installations -> App. Manager -> Open Your Apps Name, Change Seeting -> Choose Access Point for you App

Answer 4

I too had this same problem , when i was accessing the application through 3110 , 5310. Actually this problem is not because of application . It is because of connectivity which we are using in mobile. For solving this problem we will have to create access point in internet setting on mobile. or we will have to contact operator for activating the mobile office settings.

Thanks