Screen, screen and application of windows management background

Hello
I am newbie on java and on the development of bb.

I find it difficult to understand the screen, screen and how they should be used in an application.

Please don't ' send links to the documentation I've read a lot of this forum, bb pdf guides, articles etc. knowledge base and still don't know how to organize and control the screens of my application.

My application has about 8 windows diferent (or screens): main window, window options, list of items wondows, window detail, window of welcome (on the first run) etc... Currently, I have to start app.java which extends UiApplication, calling either main or windows welcome which extend screen.

1 - How many MainScreens should an app have? 1?

2 - should have a main screen and all others should be screens?

main 3-window and the window between the Options I Don t know how should I do to update the main window after

changing settings in the Options window

4. on the first execution of the Welcome window must be called and will have a "continue" button to call the Options window and after that, it should be called the main window.

Thks in advance!

As a beginner, I think it would be good if you had a book or even a few tutorials, since they usually provide you a load of useful information and fill in a load of blanks.  You can find some tutorials here:

http://supportforums.BlackBerry.com/T5/BlackBerry-smartphones-and/CT-p/smartphones

My favorite book is

BlackBerry Java Application Development, beginner's Guide, by Bill Foust.

In any case some answers:

1. as much as you like, screen does not mean only the screen, in this case I think that the principal is used to indicate that it is the screen that is used mostly.

2. no - most of my Applications are actually a combination of MainScreens and PopupScreens.

3 good question and there is no right answer here.  Call screen that will follow the on-screen Options, your InitialScreen.  So InitialScreen will be making a push for a new Instance of the OptionsScreen.  Now he could immediately pop itself the battery display, so it goes.  Now when the user leaves your Options screen, your output will be push it another Instance of your InitialScreen.  If the new InitialScreen will pick up the last values.

You will find tutorials and books will give you different options.

4. how you navigate between the windows is entirely up to you.  do not forget that you push to screen (or screen) on the stack of the display, pop to remove it.  You should always have a screen on the stack display or displays a white screen (or the previous content).

Or and the other thing that I would definitely recommend looking at the samples, they push and pop nicely.

Good luck and have fun!

Tags: BlackBerry Developers

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