blackberry - 在Blackberry编程上自动旋转

我向Blackberry Storm编写代码。当我的应用程序水平显示(480x360)时，它可以工作。但是，当黑莓手机倾斜到“垂直”(360x480)时，图片将被切断。所以我问如何设置以便在旋转时也调整图片大小？有什么方法可以检查BlackBerry是否再次水平或垂直显示？

谢谢。

最佳答案

这有两件事，您要么锁定屏幕方向，要么在应用程序中支持。

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应用程序中强制肖像 View

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

您要在方向更改时处理图像和其他图形设置，则可以在代码中进行以下更改。

覆盖MainScreen子类中的sublayout方法。

protected void sublayout(int arg0，int arg1){
//完成所有
super.sublayout(arg0，arg1);

检查方向更改，重新排列UI。建议将相对布局用于此类情况。

希望这可以帮助您。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:

您由于UI事件锁定而出了错，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);
        }

关于blackberry - 在Blackberry编程上自动旋转，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7789734/