在 BlackBerry 中将按钮放在屏幕底部并带有背景

Question

我一直在努力在我的应用程序中获取背景图像，并在屏幕底部的图像上排列四个按钮。下面我展示了我用来实现它的代码。

    HorizontalFieldManager manager = new HorizontalFieldManager();    

    manager.add(new ButtonField("1", FIELD_BOTTOM));
    manager.add(new ButtonField("2", FIELD_BOTTOM));
    manager.add(new ButtonField("3", FIELD_BOTTOM));
    manager.add(new ButtonField("4", FIELD_BOTTOM));

    mWidth = Display.getWidth();
    mHeight = Display.getHeight();
    final Bitmap backgroundBitmap = Bitmap.getBitmapResource("intro.png");
    HorizontalFieldManager BackGroundImage = new HorizontalFieldManager(HorizontalFieldManager.USE_ALL_WIDTH |HorizontalFieldManager.USE_ALL_HEIGHT)
    {

        //Override the paint method to draw the background image.
        public void paint(Graphics graphics)
        {
            //Draw the background image and then call super.paint
            //to paint the rest of the screen.
            graphics.drawBitmap(0, 0, mWidth, mHeight,backgroundBitmap, 0, 0);
            super.paint(graphics);
        }
    };

    BackGroundImage.add(manager);
    add(BackGroundImage);

问题是，如果我将 Field_BOTTOM 放在horizo​​ntalFieldManager 中，现在我无法将按钮放置在屏幕底部。

Answer 1

您可以这样做，在 Horizo​​ntalFieldManager 中将其参数设置为 FIELD_BOTTOM

HorizontalFieldManager BackGroundImage = new HorizontalFieldManager(HorizontalFieldManager.FIELD_BOTTOM)

，然后将按钮直接添加到此 Horizo​​ntalFieldManager 中，然后使用 setStatus(Field status) MainScreen 方法，即

this.setStatus(BackGroundImage);