如何在Blackberry上处理屏幕旋转

Question

What's the proper way to handle screen rotation in Blackberry? I've work with different resolutions and all I have to do is handle Bitmaps and Margins in my Fields. There's a requirement in my current project to manage screen rotation, and I don't know what's the technical approach to that.

For the records, I did a quick Google Search and all I found was information about how to disable rotation, so I'm starting to think rotation handling is kind of hard.

Answer 1

First, you need to override sublayout. You can use this code:

protected void sublayout(int width, int height)
{       
    SetLayout();
    super.sublayout(width, height);
}

In set layout, you can set the size and position of your controls. How you do this will depend on what FieldManager you use. I use an AbsoluteFieldManager and have all my fields positioned and sized according to a percentage of the width and height of the screen. For example:

private void SetLayout()
{
    int screenWidth = Display.getWidth();
    int screenHeight = Display.getHeight();
    cmdOk.SetSize((int) (screenWidth * 0.2), (int) (screenHeight * 0.1));
    manager.setPosChild(cmdOk, 0, screenHeight - cmdOk.getHeight());
}

I hope this helps