(HttpConnection) Connector.open(url) with touch phone

Question

I am working on a J2ME application, it makes a HTTP request and works accordingly to the response received.

Below is my code for HTTP request

public String sendHttpGet(String url, String str) throws Exception {
    HttpConnection hcon = null;
    DataInputStream dis = null;
    StringBuffer message = new StringBuffer();
    try {

        hcon = (HttpConnection) Connector.open(url);
        dis = new DataInputStream(hcon.openInputStream());
        int ch;
        while ((ch = dis.read()) != -1) {
            message.append((char)ch);
        }
    }catch(Exception e){   

    }finally {
        if (hcon != null) {
            hcon.close();
        }

        if (dis != null) {
            dis.close();
        }
        MyForm.show();
    }
    return message.toString();
}

It is working fine on non touch devices, but when I checked it on Nokia 500 touch phone,

the code executes till line

hcon = (HttpConnection) Connector.open(url);

without throwing any exception, it ends up to show first screen of the application (Main Menu).

Is there any limitation or problem?

Any solution?

As I can see in your code you're catching the Exception without logging or throwing a runtime exception. Try to log this exception and then print the stacktrace here that we can help yo — sandrozbinden, Feb 02 '12 at 12:32
thanks for quick response, i have removed exception message(and logs) from the code above to remove extra code. i checked it by displaying message using Dialog. — Syed Muhammad Umair, Feb 02 '12 at 12:58
I think your code is correct.Better you check your GPRS/network connection,settings in your mobile. — SIVAKUMAR.J, Apr 14 '12 at 12:22

score 1 · Answer 1 · answered Feb 02 '12 at 13:15

1

Have you added permission in jad like this

MIDlet-Permissions: javax.microedition.io.Connector.http

or you can add this permission in netbean by following steps

Right Click on project
Click on Properties.
Click on Application Descripter
Select tab API Permission
Click on Add Button And from list add javax.microedition.io.Connecter.http

Hope this will help you.

answered Feb 02 '12 at 13:15

Mr. Sajid Shaikh

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Yes, i have added permissions. – Syed Muhammad Umair Feb 02 '12 at 13:21
check it, its running or not? – Mr. Sajid Shaikh Feb 02 '12 at 13:23
it is running perfectly fine on non touch phone. but undesired routing to Main Menu on touch phone. – Syed Muhammad Umair Feb 02 '12 at 13:25
if this is the issue of the flow, then why is it working on non-touch phones? – Syed Muhammad Umair Feb 03 '12 at 04:22
And there is no routing between these two lines of code ---->hcon = (HttpConnection) Connector.open(url); dis = new DataInputStream(hcon.openInputStream());<---- – Syed Muhammad Umair Feb 03 '12 at 04:47
Though i am assign null to all unused objects but can this be an issue of memory leaks? – Syed Muhammad Umair Feb 03 '12 at 04:49
how can i get Stacktrace? i know printStackTrace() will be used. where will i get the output on mobile? – Syed Muhammad Umair Feb 03 '12 at 05:08
not on mobile, it will print in console, use this staement in catch block e.printStackTrace(); – Mr. Sajid Shaikh Feb 03 '12 at 05:19
Application is working fine on emulator. Issue is on touch phone. i have to track it on mobile device. how can i? – Syed Muhammad Umair Feb 03 '12 at 05:36
i have cleaned project several times. – Syed Muhammad Umair Feb 03 '12 at 05:48
may be You have to be sign in your apllication. Check this link http://browndrf.blogspot.in/2006/06/build-and-install-singed-midlet.html – Mr. Sajid Shaikh Feb 03 '12 at 06:37

(HttpConnection) Connector.open(url) with touch phone

1 Answers1