黑莓编程的自动旋转

Question

我为Blackberry Storm制作代码.当我的应用程序在水平显示(480x360)时,它的工作.但当黑莓倾斜到垂直(360x480)时,图片被切断了.所以我问如何设置,以便在轮换时,还调整图片大小？有没有办法检查黑莓再次水平或垂直显示？

谢谢.

Answer 1

这里有两件事,要么您将锁定屏幕方向,要么您将在您的应用程序中支持.

代码示例:检索屏幕方向

switch(Display.getOrientation()) 
{
   case Display.ORIENTATION_LANDSCAPE:
      Dialog.alert("Screen orientation is landscape"); break;
   case Display.ORIENTATION_PORTRAIT:
      Dialog.alert("Screen orientation is portrait"); break;
   case Display.ORIENTATION_SQUARE:
      Dialog.alert("Screen orientation is square"); break;
   default:
      Dialog.alert("Screen orientation is not known"); break;
}

代码示例:在BlackBerry API应用程序中强制纵向视图

// Use code like this before invoking UiApplication.pushScreen()
int direction = Display.DIRECTION_NORTH;
Ui.getUiEngineInstance().setAcceptableDirections(direction);

您想要在方向更改时处理图像和其他图形设置,然后您可以在代码中进行以下更改.

1. 在MainScreen子类中重写sublayout方法.

   protected void sublayout(int arg0,int arg1){//执行所有super.sublayout(arg0,arg1); }

2. 检查方向更改,重新排列UI.对于这样的事情,建议使用相对布局.

希望,这可能会帮助你.有关更多信息,请访问Specifying_display_direction_of_screen

编辑:覆盖sublayout(),然后编写特定于方向的代码

public void sublayout(int width, int height) {
    switch(Display.getOrientation()) 
        {
           case Display.ORIENTATION_LANDSCAPE:
              // write the piece of code for refreshing the screen UI which screen orientation is landscape
              break;
           case Display.ORIENTATION_PORTRAIT:
               // write the piece of code for refreshing the screen UI which screen orientation is portrait
               break;

        }
  super.sublayout(width, height);
}

编辑2:

由于UI事件锁定,您出错了,现在您对代码进行了以下更改.

public void sublayout(int maxWidth, int maxHeight) {
            int displayWidth = deviceWidth;
            int displayHeight = deviceHeight;

            switch (Display.getOrientation()) {
            case Display.ORIENTATION_LANDSCAPE:
                UiApplication.getUiApplication().invokeLater(new Runnable()
                {
                    public void run()
                    {
                        Dialog.alert("Screen orientation is landscape");
                        // here you need to change your uI code as you want to do in for landscape mode
                        // you may need to delete and add the UI comps manually
                        // if the components added to absolute layout then just refresh the screen it will auto adjust with your new screen size 
                    }
                });

                break;
            case Display.ORIENTATION_PORTRAIT:
                UiApplication.getUiApplication().invokeLater(new Runnable()
                {
                    public void run()
                    {
                        Dialog.alert("Screen orientation is PORTRAIT:");
                        // here you need to change your uI code as you want to do in for PORTRAIT mode
                        // you may need to delete and add the UI comps manually
                        // if the components added to absolute layout then just refresh the screen it will auto adjust with your new screen size 

                    }
                });
                break;
            }
            super.sublayout(displayWidth, displayHeight);
            setExtent(displayWidth, displayHeight);
        }