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Java Development

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Developer
brendanmc25
Posts: 63
Registered: ‎08-07-2009
My Device: Not Specified

Object List Field - view and paint - separate threads

Hi, I am wondering if someone could offer me a pointer in the right direction, i'm inserting rows of the olf 3 times before i show it on screen, it keeps loading but i ve found this is the best way other than having the user sit there for 40 secs waiting for app to load data when they could be viewing what's already there now. I want to somehow get the rows painting in a seperate thread so that i can scroll whilst loading. Currently i can't scroll for periods of about 5 secs every 5 secs whilst loading. 

I insert row like so..

 

public  void insertRow()
 {
 synchronized (UiApplication.getApplication().getEventLock())
 {
 OLF.insert(i, new Person(Id,  name));
    
 }
 }

 

I am a little confused so please forgive a new prgrammer!

 

Regards

 

Brendan

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Administrator
MSohm
Posts: 14,528
Registered: ‎07-09-2008
My Device: BlackBerry Z30, BlackBerry PlayBook
My Carrier: Bell

Re: Object List Field - view and paint - separate threads

Synchronizing with the event lock in this manor interrupts what it is doing to execute your insert, which means you can interrupt a user interacting with the application.  I recommend implementing the approach below.

 

How to - Update a screen on the Main Event Thread
Article Number: DB-00136

http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/800505/800256/...

Mark Sohm
BlackBerry Development Advisor

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