HorizontalFieldManager类型对象中Field是怎样布局的

[advancedprogramor]

HorizontalFieldManager iconHLayout = new HorizontalFieldManager(Field.FIELD_HCENTER|Field.FIELD_VCENTER);
             BitmapField cmptBmpField=new BitmapField(Bitmap.getBitmapResource("my_computer.png"));
             BitmapField fldBmpField=new BitmapField(Bitmap.getBitmapResource("my_folder.png"));
             BitmapField netIeBmpField=new BitmapField(Bitmap.getBitmapResource("internet_explorer.png"));
             iconHLayout.add(cmptBmpField);
             iconHLayout.add(cmptBmpField);
             iconHLayout.add(netIeBmpField);
             //bgVLayout是背景图层管理器，垂直分布的VerticalFieldManager bgVLayout
             bgVLayout.add(iconHLayout);
             this.add(bgVLayout);

这些代码都在主屏幕的构造函数中，当我只在iconHLayout图层中添加一个BitmapField域时，比如只添加cmptBmpField，程序正确，但当我添加上面三个的时候，出运行错误。

[lixin1020]

bgVLayout 哪里来的??

另外 iconHLayout.add(cmptBmpField);
iconHLayout.add(cmptBmpField); 写错了

[vercity]

要么就是楼上说的 要么就是资源名自己写错了

[houtian80]

iconHLayout.add(cmptBmpField);
iconHLayout.add(cmptBmpField);
一个组件（cmptBmpField）不能往屏幕上放两次