Comments on: Creating a Blackberry Game – Part 2

By: Toni

Toni — Tue, 13 Jul 2010 01:45:53 +0000

Hi Hitendra – glad it helped! Good luck on your projects!

By: Hitendra

Hitendra — Thu, 17 Jun 2010 14:33:12 +0000

As i am newbie to blackberry and the custommanager funda helps me to do a lots of thing in my project.it helps me great.
thankx a lot tony

By: Toni

Toni — Sun, 21 Feb 2010 03:36:14 +0000

Joe – you’ve probably long since figured it out / moved on, but it sounds like something being called from “trackwheelClick” isn’t being instantiated before being used – are you use you’ve included all the necessary “new” statements on objects before referencing them?

Jay – Thanks for the kudos! Again, I’ve been lax about updating the blog, so you’ve probably figured things out by now, but “sublayout” is a standard method within the Manager class. It defines where fields appear within that layout manager. It’s automatically called when a screen containing it refreshes. When we create a custom layout manager, we override this method to control where we want fields to appear in a special, custom way. Then we add this custom layout manager to the screen (e.g. line 197, line 221), and from then on it will get called automatically. The preferredHeight and width functions work in the same way.

By: Jay Jawalkar

Jay Jawalkar — Mon, 05 Oct 2009 12:25:29 +0000

Awesome Guide Toni! please continue this great work. Can you please explain me in detail about “Sublayout” method. Who calls this function ? From where it takes the “width” & “height” parameter value? Who Calls the “getPreferredHeight()” & “getPreferredWidth” method ? Can you help out ? Thanks in Advance!

By: Joe

Joe — Fri, 25 Sep 2009 00:41:55 +0000

I liked the tutorial but i got a little problem, i tried with your code to do this application and I don´t get any compiling errors, but when I execute the program, If I click Start Game! I get a NullPointer exception error 104. Hope you can help me. Thanks!

By: SuperFlyJedi

SuperFlyJedi — Thu, 30 Jul 2009 15:47:10 +0000

Great guide Toni! Awesome for getting the ball rolling on a new BB project.

By: Toni

Toni — Fri, 26 Jun 2009 17:41:15 +0000

Thanks for the kudos, guys, I’m glad it’s helping people.

Bullghost – trackwheelClick, keyDown, keyUp, etc are all methods of the “Field” class and any classes inherited from it. In this fashion, you can make each field react differently if it receives a keyboard/trackball action. Managers are derived from the Field class as well, so if you’re extending a Manager class, like we did with CustomManager above, you can simply add a “trackWheel” method just like we did above for _startButton. I’m not sure if that answers your question – let me know exactly what you’re trying to do so I understand better.

By: bullghost

bullghost — Sun, 14 Jun 2009 14:35:53 +0000

yes iam agree with sine, much2x helpfull then any other on internet,
i have a question
can we add event on custom manager
to handle the input , like trackwheelClick, or other key event ?
can you please make the example .

Thank You toni

regards,
bullghost

By: kmd

kmd — Thu, 07 May 2009 17:52:09 +0000

Finally, a straightforward tutorial that doesn’t assume I’ve been programming for 10 years. Thanks for this.

By: Kunal Mahajan

Kunal Mahajan — Wed, 25 Mar 2009 13:20:19 +0000

Thx buddy…
wht da tremendous tutorial