java - 如何在 Blackberry 7.1 中设置背景图像

Question

我正在尝试为 Blackberry 9900 模拟器设置背景图像，我编写了如下代码

BitmapField _bitmap ;
private int phoneWidth = Display.getWidth();
private int cellHeight = Display.getHeight();
 public MyScreen(){

     super(Manager.USE_ALL_WIDTH | Manager.NO_VERTICAL_SCROLL);

     final Bitmap background = Bitmap.getBitmapResource("black.jpg");
     VerticalFieldManager vfm = new VerticalFieldManager(USE_ALL_HEIGHT | USE_ALL_WIDTH) {
         public void paint(Graphics g) {
             Bitmap scaled = new Bitmap(phoneWidth, cellHeight);         
             background.scaleInto(scaled, Bitmap.SCALE_TO_FIT);
             g.drawBitmap(0, 0, phoneWidth, cellHeight,
                             background, 0, 0);
             super.paint(g);
         }
     };
     add(vfm);
 }

我在模拟器中得到这样的输出

我想要背景图片填充完整的背景，任何帮助将不胜感激，提前谢谢你。

Answer 1

问题在这里

 g.drawBitmap(0, 0, phoneWidth, cellHeight,
                             background, 0, 0);

你必须绘制缩放位图

 g.drawBitmap(0, 0, phoneWidth, cellHeight,
                             scaled , 0, 0);