学步园

设置Manager的高度及背景图片，思路：重写Manager里面的sublayout方法，加上setExtent(width, h); 重写paintBackground方法设置背景图片。代码如下,调用的时候传入参数就可以了...

CustomVerticalFieldManager.java

/**<br /> * @author Stephen_daoying<br /> */<br /> import net.rim.device.api.system.Bitmap;<br /> import net.rim.device.api.system.Display;<br /> import net.rim.device.api.ui.Font;<br /> import net.rim.device.api.ui.Graphics;<br /> import net.rim.device.api.ui.container.VerticalFieldManager;</p> <p>public class CustomVerticalFieldManager extends VerticalFieldManager{</p> <p> private int h;<br /> private Bitmap _bitmap;</p> <p> public CustomVerticalFieldManager (long style, int h, Bitmap _bitmap,){<br /> super(style);<br /> this.h = h;<br /> this._bitmap = _bitmap;<br /> }</p> <p> protected void sublayout(int width, int height) {<br /> int numberOfFields = getFieldCount();<br /> for (int i = 0; i < numberOfFields; ++i) {<br /> layoutChild(getField(i), width, height);<br /> setPositionChild(getField(i), 0, 0);<br /> }<br /> setExtent(width, h);<br /> }</p> <p> protected void paintBackground(Graphics graphics) {<br /> if(_bitmap != null){<br /> graphics.drawBitmap(0, 0, _bitmap.getWidth(), _bitmap.getHeight(), _bitmap, 0, 0);<br /> super.paint(graphics);<br /> }<br /> }<br /> }