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？

感谢。

Answer 1

以下是两件事，要么您将锁定屏幕方向，要么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。

在MainScreen子类中重写sublayout方法。

protected void sublayout（int arg0，int arg1）{ //做所有的 super.sublayout（arg0，arg1）; }
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。有关详细信息，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);
        }

Answer 2

我之前遇到过这个问题并解决了它。解决方案不是“迫使黑莓屏幕不旋转”。我之前做过这件事很烦人。那么解决方案是覆盖主屏幕的subLayout方法和主屏幕中包含的所有管理器。旋转发生时始终会调用此方法。

您的代码如下所示：

public void sublayout(int width, int height) {
  changeImage(); // this method will change your image x and y and then draw it again
  super.sublayout(width, height);
}

黑莓编程的自动旋转

2 个答案: