Problems with preferences

**edua91** · 2011-06-28, 20:12

I couldn't find information about this subject, I hope you can help me.

I'm using the following code trying to save some settings, but I can't make it work, the web app just get stuck, or continues without giving me the alert:

Here's what I have in the config.xml:

Code:

<preference name="user" readonly="false" value="User"/>

Index.html:

Code:

<body onload="init();">

code.js:

Code:

function init()
{	
	alert(widget.preferences['user']);
}

without that the web app works fine, the problems come when I add code for saving or loading preferences. I also tried widget.preferences.getItem('user'), and got the same results.

Thanks in advance for your help

**Maveric** · 2011-06-29, 07:52

Hello edua91 and welcome to the discussion boards!

Try this:
Add the following line to your config.xml, but do not remove any lines.

Have it located below the " <feature name..." tag.

<preference name="user" readonly="false" value="Marko"/>

Then into your basic.js:

function init()
{
alert(widget.preferences['user']);
}
</code>

Then, run the preview. You should see "Marko" displayed and then below that "OK".

Please compare this to what you have and see where the difference, hope this helps!

Best,
Marko

**edua91** · 2011-06-29, 16:31

Hi Marko, thank you for your time, I tried your code on my project but it didn't work neither on the simulator nor the device, then I created a new project and just added your code, it worked on the simulator but not on the device =/, I'm using a X3-02 and a C3-00 for testing, both gave me the same results.

Just for reference, the actual project is more complex than just giving the alert, i just post a simplified version of my problem, but it is weird that it didn't worked even on a new project with just that code

Eduardo

**basker16** · 2012-03-13, 06:10

Hi, I tried same code it worked on the simulator (its stored for that particular application cycle and if i close the application and relaunch it , in that case i am not able to see the stored data) .
However, documentation claims that i"widget.preferences" will store data in device permanent storage.

**isalento** · 2012-03-13, 06:46

Originally Posted by basker16

Hi, I tried same code it worked on the simulator (its stored for that particular application cycle and if i close the application and relaunch it , in that case i am not able to see the stored data) .
However, documentation claims that i"widget.preferences" will store data in device permanent storage.

Hello and welcome to forum!

There is a known issue about simulator local preview and setItem()/getItem() methods.
For simulator, bracket access should be used to set/get preferences e.g. widget.preferences["key"] = "value";.

Second thing that might cause this, is that preference is not declared in config.xml. So please check that you have
<preference name="key" value=""/> in config.xml

PS. as a third option. alert() is not supported is Series 40 Web Apps.

Br,
Ilkka

**basker16** · 2012-03-14, 08:18

hi Ilkka,
thanks for your response.

I forgot to mentioned in my previous post that the same (widget.preferences["key"] = "value"; and defining the 'Key' inside 'preferences' tag in config.xml) code I tried and it is not working.
What I mean to say here is not working is it is not storing the data in device 'persistent memory' i.e. if I close the applciation and relaunch it.

Can you please guide me to store data in persistent memory for S40 webapps?

**isalento** · 2012-03-14, 08:45

I wrote a Wiki article about storing preferences: (feedback welcome

). Basically the steps you have taken, should be enough to make preferences work.
http://www.developer.nokia.com/Commu...es_40_Web_Apps

Could you check what Nokia Browser version is installed? (Options ->Tools -> About)
If it is less than 1.5.x, I would recommend to download latest from http://download.browser.ovi.com/

Br,
Ilkka

**sperelson** · 2012-03-16, 09:21

Hi basker16,

You have to run the web app from the Nokia Browser's Web App menu and not from the URL address bar. I encountered this problem before. Not sure why it treats the URL address bar differently. Maybe it is a bug in Nokia Browser.

Your web app will appear in the Web App menu after the first run from the URL address bar.

I hope that helps.

Regards,
Stephen

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