Running an application in the background

[bolfo]

Hi guys,

I was wondering if it is possible to run a java application in the background like a process.
We have developed an application that receives data from an external device using Bluetooth. We would like to have this app running so that transmission is done without the user having to intervene at all.
Is this possible with the S40 and/or S60 phones?

[raj_J2ME]

Hey bolfo,

Welcome to the forum nokia discussion boards.....

3


to set a j2me app to the background use the following in your midlet class:

Display.getDisplay (this).setCurrent (null);

to get the screen back use the following:

Display.getDisplay (this).setCurrent (myCanvas);

Where myCanvas is your canvas instantiation

R

You can still use a thread or timer to do things in the background while your midlet is hidden.

This does not work on all models. Works on Nokia s60, SonyEricsson, but only on latest Nokia device of s40.

[ektasrv]

Hi guys,

I was wondering if it is possible to run a java application in the background like a process.
We have developed an application that receives data from an external device using Bluetooth. We would like to have this app running so that transmission is done without the user having to intervene at all.
Is this possible with the S40 and/or S60 phones?

Try -

Nokia-MIDlet-bg-server

Series 40 5th edition FP 1 ( where Display.getDisplay (this).setCurrent (null); may not work)

Indicates MIDlet-n in the suite that is a BG server.

Example:
Add Nokia-MIDlet-bg-server: 1 in your application JAD file to tell the AMS on the device that its a background application that does not require any user intervene or UI Display.

Also see other S40 background app related JAD properties on http://library.forum.nokia.com/topic...E4A538FB8.html to set more control on your background running apps.

[bolfo]

Hi guys,
Thank you for your help.
A few additional questions:
- it works only on the latest s40 devices: how can we check if a device is compatible or not?
- if we get things to work this way, the software would still need to be initiated by the user every time the phone is turned off and on again, right?

[ektasrv]

Hi guys,
- if we get things to work this way, the software would still need to be initiated by the user every time the phone is turned off and on again, right?

See the link I gave before -- Nokia-MIDlet-auto-start can be used to launch the app again on device restart.

- it works only on the latest s40 devices: how can we check if a device is compatible or not?

it works on device which are Series 40 5th edition FP 1 onwards, you need to have multiple builds of your application on OTA server which needs to identify the requesting device by UserAgent header and gives the relevant build to the device depending on its capabilities.

[bolfo]

ok thank you ektasrv, we will be looking in to it.
Thanks again for your kind help.