Blackberry 5.0 devices only partially work, needs improvement

[sbelen]

Hello,

I'm trying to view the JQ Mobile demo: http://jquerymobile.com/demos/1.0a2/ on Blackberry Bold 9000 (BB5) but it only returns a white page with only the title filled in.

[toddparker]

We just tested this on our 9330 Curve and 9550 Storm 2 and both devices loaded that page correctly and I was able to navigate around. Can you re-try?

[sbelen]

Hello,

I've tried it again and it fails again.
Actually when i try the 1.0a1 demo it works fine..

Maybe this is because the proxy of my Mobile Provider is between ?

[toddparker]

Could be. Can you try it on wifi?

[DavidDeSloovere]

I'm seeing the same problem on the Blackberry simulators: https://github.com/jquery/jquery-mobile/issues/issue/478

[ry0ohki]

Seeing the same issue on the simulator and on an actual BB5 phone (Blank screen with scroll bars on demo page)

[nariman-haghighi]

There seems to be a workaround for this at least: http://forum.jquery.com/topic/i-can-t-get-jquery-mobile-to-render-on-blackberry-os-5-simulators

[johnbender]

Can you test on the lastest? Thanks!

http://jquerymobile.com/test/

[Inawire]

I still had the problem with some apps. Newest build seams to load most times for me now.

Try turning off "JavaScript Timeout" for the BB browser.
(Options - Browser configuration - Terminate slow running scripts)

Application now renders.
Note: Not a solution just an area to start looking for a solution...

I added some more on this in the thread:
http://forum.jquery.com/topic/i-can-t-get-jquery-mobile-to-render-on-blackberry-os-5-simulators

Looks like a time out issue with no warning. I'm assuming that with code optimization this might be avoided but how to handle some sort of warning when it does?

[TZAdvantage]

There is an issue where mobile providers change the contents of the html and combine css and js files to minimize requests. If you have files that have a UTF-8 signature (first 3 bytes) this will corrupt the the combined files with invalid characters in between. One solution is to combine the files on your side (don't forget to strip the utf8 signature when present) and even better when possible also compress them. In that case the provider will leave those files alone.

in c# you do something like this:
foreach (string FileName in Files) {
byte[] bytes;
if (File.Exists(context.Server.MapPath(FileName))) {
bytes = File.ReadAllBytes(context.Server.MapPath(FileName));
if (bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF) {
m = System.Text.ASCIIEncoding.UTF8.GetBytes("/\r\n File: " + FileName + ". Removed UTF-8 Signature.\r\n/\r\n");
Writer.Write(m, 0, m.Length);
Writer.Write(bytes, 3, bytes.Length - 3);
} else {
m = System.Text.ASCIIEncoding.UTF8.GetBytes("/\r\n File: " + FileName + ". Unkown encoding. Writing as if it was UTF-8 without signature.\r\n/\r\n");
Writer.Write(m, 0, m.Length);
Writer.Write(bytes, 0, bytes.Length);
}

                    } else {
                        m = System.Text.ASCIIEncoding.UTF8.GetBytes("/*\r\n  File: " + FileName + ". FILE NOT FOUND!!!.\r\n*/\r\n");
                        Writer.Write(m, 0, m.Length);
                    }
                }

hope this helps to exclude some unexpected results.

[toddparker]

This is now closed with our fix that excluded BB5 from Ajax navigation, among other tweaks.

[dcherman]

This is still occurring with JQM Beta 2. I have a simple page that with a single UL, but has 50 items in the list (each containing a link element).

The page does not finish rendering before it hits the BB Browser "slow script" timeout. If I turn off that option, it works fine. If I leave it on, I get a blank page close to 100% of the time.

[ricksuggs]

I can confirm this as well, I've narrowed down my Blackberry 5.0 problem to the script terminating when processing a listview of 16 items containing links, the script repeatedly terminates after the first 6 listviews in the 'listviewcreate' event handler.

[mbernier85]

This issue should be open, try using a BlackBerry 9300 on OS 5.0 and the page :

http://jquerymobile.com/demos/1.0b3/docs/lists/lists-performance.html

The problem will occur, the javascript will timeout and show a blank page, which is not a good behaviour, we lost a good amount of time seeking the problem.