CODEWITHSUNDEEP
user-interfaceblackberryscreendynamic
user856065
user856065

Reputation: 69

How to update a screen when an event occurs at another screen?

I am developing a chat application in blackberry. I have made a main screen which acts like the home screen of the application. Whenever application is started this screen appears first.

There are like 5 screens (1 Main screen and 4 other screens). My problem is..I want to update this 1 main screen when something happens on other 4 screens. Like For example, if I'm using the voice recording screen of my application. I have to add an icon to my main screen of the application indicating I have recorded a voice message after I have finished up.

I am not able to get the logic for doing this. Since I want to update a screen's UI which is already on stack, from a screen which is at the top of the stack.

And also, I want to keep those things at the main screen of the application whenever I start my application(just like history of the activities).

please help.

Upvotes: 0

Views: 179

Answers (2)

indusBull
indusBull

Reputation: 1854

Read this article: http://berrytutorials.blogspot.com/2009/12/blackberry-threads-dynamically-update.html

It shows how to update UI from different thread using Observer Design pattern. But you can use same technique to update screen from different screens.

Upvotes: 1

user784540
user784540

Reputation:

Take a look at MVC design pattern.

Implement screens as Views which get notified when data model changed.

Upvotes: 1

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