javaMe自定义菜单

public interface IMenuItemListener {
 public abstract void setTask();

}

z自定义的抽象事件，因为接口可以当成对象来使用，只不过自使用时需重写其中 的抽象方法。自定义的菜单响应事件接口。

import com.sun.lwuit.Button;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Image;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;

public class IMenuItem extends Button{  
 private IMenuItemListener  menuItemListener=null; 
 public IMenuItem(){
  super();
  run();
 }
 public IMenuItem(String title){
  super(title);
  run();
 }
 public IMenuItem(Image icon){
  super(icon);
  run();
 }
 public IMenuItem(String text, Image icon){
  super(text,icon);
  run();  
 }

 private void run(){
  this.getStyle().setBorder(null);
  this.getPressedStyle().setBorder(null);  
  this.getSelectedStyle().setBorder(null);
  
  this.getPressedStyle().setBgColor(0X53123);
  this.getSelectedStyle().setBgColor(0Xbcbcbc);
  
  this.getStyle().setMargin(0, 0, 0,0);
  this.getSelectedStyle().setMargin(0, 0,0,0);
  this.getPressedStyle().setMargin(0, 0,0,0);
  
  this.setTextPosition(Button.LEFT);  
  this.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent evt) {   
    Dialog dialog=(Dialog)((Button)evt.getSource()).getComponentForm();    
    if(dialog!=null)
     dialog.dispose(); //释放所在的资源
    
    if(menuItemListener!=null)
     menuItemListener.setTask();
   
   }   
  });
 }
 public void addMenuItemListener(IMenuItemListener Itemlistener){
  menuItemListener=Itemlistener;
 } 
}

/**********自定义的菜单项继承Button***********/

 

 

import java.util.Vector;

import com.peptalk.kaikai.client.ui.BaseUiData;
import com.sun.lwuit.Command;
import com.sun.lwuit.Component;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Display;
import com.sun.lwuit.Image;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.BoxLayout;

public class IMenu extends Command{
 
 private int height=0;
 private int width=0;
 private Vector vec=new Vector();
 
 private Dialog dialog=null;
 private BoxLayout lay=new BoxLayout(BoxLayout.Y_AXIS);
 
     private boolean orgion=RIGHT; 
  public static final boolean LEFT=false;
     public static final boolean RIGHT=true;
    
    public IMenu(String title){
     super(title);
     dialog=new Dialog(){
        public void menuDisplose() { //重写按键释放方法            
         this.dispose();
        }        
     };
     dialog.setTransitionInAnimator(BaseUiData.getInstance().getSlideLeft());
     dialog.setTransitionOutAnimator(BaseUiData.getInstance().getSlideTop());

  
    }
    public void actionPerformed(ActionEvent evt) { 
      for (int i = 0; i<dialog.getComponentCount();i++) {
    dialog.getComponentAt(i).getStyle().setBgTransparency(0);
         }
         dialog.setScrollableY(false);          
         showMenuItem();
    
    }
 
 private boolean isFlush=true;
 
 public void flush(){
    height=0;
    width=0;
       dialog.removeAll();
    dialog.setLayout(lay);  
  for(int i=0;i<vec.size();i++){
   IMenuItem item=(IMenuItem)vec.elementAt(i);
   if(item!=null){
    height+=item.getPreferredH();   
    width=Math.max(item.getPreferredW()+item.getBaselineResizeBehavior()*2,width);   
         dialog.addComponent(item);
   }
  }
  isFlush=false;
 }
 private void restartWidth(){//重新计算宽度和高度 
  width=0;
  for(int i=0;i<vec.size();i++){
   IMenuItem item=(IMenuItem)vec.elementAt(i);
   width=Math.max(item.getPreferredW()+item.getBaselineResizeBehavior()*2,width); 
  }
 }
 public void showMenuItem(){  
  if(isFlush)
   flush();
  
  if(orgion)
       dialog.show(Display.getInstance().getDisplayHeight()-30-height,25,Display.getInstance().getDisplayWidth()-width,0,true);
  else
   dialog.show(Display.getInstance().getDisplayHeight()-30-height,25,2,Display.getInstance().getDisplayWidth()-width-8,true); 
 }
  public void addMenuItem(IMenuItem item){//添加菜单
    if(!vec.contains(item)&&!dialog.contains(item)){
  vec.addElement(item); 
  dialog.addComponent(item);   
   }
  }
 public void removeAllMenuItem(){
  vec.removeAllElements();
  dialog.removeAll();
 }
 public void addMenuItem(IMenuItem item,int index){//把菜单添加到指定的位置
  if(!vec.contains(item)&&!dialog.contains(item)){
  vec.insertElementAt(item, index);   
  dialog.addComponent(index, item);
   }
 
 }
 public void removeMenuItem(int index){//删除指定位置的菜单
  if(vec.size()>index&&index>-1){   
   IMenuItem tempItem=(IMenuItem)vec.elementAt(index);
   height-=tempItem.getPreferredH();   
   restartWidth();   
   dialog.removeComponent(tempItem);
   vec.removeElementAt(index);   
  }    
 }
 public void removeMenuItem(IMenuItem obg){ //删除菜单
  if(dialog.contains(obg)){   
            height-=obg.getPreferredH(); 
            dialog.removeComponent(obg);
           if(vec.contains(obg))
               vec.removeElement(obg);
   restartWidth();   
  }   
 }
 public int getMenuItemIndex(IMenuItem item){//得到菜单的位置
  if(dialog.contains(item))
  return dialog.getComponentIndex(item);
  
  return -1;
 }
 public void setMenuItem(boolean oright){
  orgion=oright;
 }

}
菜单根类，

public void menuDisplose() { //重写按键释放方法            
是自己偷懒在Form类中假的一个空方法，在子类中重写就ok了

Form中加的方法如下，主要响应某一个特殊的按键代码如下：

  public void menuDisplose(){//菜单隐藏自定义方法       
    }
    /**
     * @inheritDoc
     */
    public void keyReleased(int keyCode) {
        int game = Display.getInstance().getGameAction(keyCode);
        if(keyCode == rightSK ){
         menuDisplose();//菜单消失
        }
        if (keyCode == leftSK || (keyCode == rightSK || keyCode == rightSK2) || keyCode == backSK ||
                (keyCode == clearSK && clearCommand != null) ||
                (keyCode == backspaceSK && clearCommand != null) ||
                (Display.getInstance().isThirdSoftButton() && game == Display.GAME_FIRE)) {
            menuBar.keyReleased(keyCode);
            return;
        }
        
        //Component focused = focusManager.getFocused();
        if (focused != null) {
            if (focused.getComponentForm() == this) {
                focused.keyReleased(keyCode);
            }
        }

        // prevent the default action from stealing the behavior from the popup/combo box...
        if (game == Display.GAME_FIRE) {
            Command defaultCmd = getDefaultCommand();
            if (defaultCmd != null) {
                defaultCmd.actionPerformed(new ActionEvent(defaultCmd, keyCode));
                actionCommandImpl(defaultCmd);
            }
        }
        fireKeyEvent(keyListeners, keyCode);
        fireKeyEvent(gameKeyListeners, game);
    }