如何开发多屏黑莓应用程序?
我需要开发一个应用程序,可以使用上一个和下一个菜单项来更改屏幕。你能给我一个关于如何实施它的粗略想法吗?
谢谢
I need to develop an application where I am able to change screens using menu items previous and next. Can u give me a rough idea about how to implement it?
Thanks
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您可以将其实现为屏幕数组并将它们推成圆圈。但不要忘记在推送新屏幕之前拉出当前屏幕。
应用程序将处理屏幕切换,也将处理屏幕阵列。但是菜单放置在屏幕上,因此我们必须在屏幕和应用程序类之间进行一些通信。
让我们有一些监听器来切换屏幕:
现在我们可以使用这个监听器和适当的菜单来实现屏幕:
以及应用程序类本身:
alt文本http://img526.imageshack.us/img526/2372/screenbarrel.jpg
You can implement it as an array of screens and push them in circle. but don't forget to pull current screen before push new.
It's the application will handle screen switch and also it will handle the screen array. But menu is placed on the screen, so we have to make some communication between screen and application class.
Let's have some listener to switch screens:
Now we can implement screen with this listener and appropriate menu:
And application class itself:
alt text http://img526.imageshack.us/img526/2372/screenbarrel.jpg
使用此功能显示另一个屏幕
use this function to show another screen