centermenu.java

在手机上 可以 存取数据 删除 数据 一个简单的手机应用

import java.util.Vector;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Font;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;

public class CenterMenu extends Canvas {
    private DataSave dataSave;
    private Container container;
    public static final Command SELECT_COMMAND = new Command("", 1, 0);
    
    private Vector vector;
    
    private int numberInScream = 0;// 在屏幕上显示个菜单项的数目
    
    private int upHeight, lowHeight;
    
    private int changedY = 0;
    
    private int height, width;
    
    private int fontHeight;
    private Jianhuaban midlet;
    static  Displayable Centerdisplayable;
    private Display display;
//	MAIN_LIST_Y开始显示的y坐标
//  moveListIndex移位后的游标
//  mainListSelectIndex主移动的游标
//  MAX_LINE显示在屏幕上的个数
//  lineSpace字体间距
    private ChoiceGroup cg;
    public int MAIN_LIST_Y,moveListIndex, mainListSelectIndex,MAX_LINE,lineSpace=0;
    
    public Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,
            Font.SIZE_MEDIUM);
    
    public CenterMenu(Jianhuaban midlet,Displayable displayable,String[] string,Container container,DataSave dataSave) {
        this.midlet=midlet;
        this.Centerdisplayable=displayable;
        this.display = Display.getDisplay(midlet);
        
        width = this.getWidth();
        height = this.getHeight();
        
        vector = new Vector();
        for (int i = 0; i < string.length; i++) {
            vector.addElement(string[i]);
        }
        MAX_LINE=12;
        MAIN_LIST_Y=20;
        lineSpace=20;
        this.container=container;
        this.dataSave=dataSave;
    }
    
    public void keyPressed(int keyCode) {
        if (getGameAction(keyCode) == Canvas.DOWN) {
            changedY++;
            if(changedY==vector.size()){
                changedY=0;
            }
            mainListSelectIndex++;
            repaint();
            if (mainListSelectIndex > vector.size() - 1) {
                mainListSelectIndex = vector.size() - 1;
            } else {
                if (mainListSelectIndex - moveListIndex >= MAX_LINE) {
                    moveListIndex++;
                }
            }
        }
        if (getGameAction(keyCode) == Canvas.UP) {
            changedY--;
            if(changedY==0){
                changedY=vector.size()-1;
            }
            mainListSelectIndex--;
            repaint();
            if (mainListSelectIndex < 0) {
                mainListSelectIndex = 0;
            } else {
                if (mainListSelectIndex < moveListIndex) {
                    moveListIndex--;
                }
            }
            
        }
        
        if (getGameAction(keyCode) == Canvas.FIRE) {
            getChoicedNumber();
        }
        
    }
    
    protected void paint(Graphics g) {
        g.setFont(font);
        
        g.setColor(0xffffff);
        g.fillRect(0, 0, width, height);
        
        drawList(vector, 0, MAIN_LIST_Y, height, width,moveListIndex, mainListSelectIndex,g);
        
        
        
        
    }
    
    public void    getChoicedNumber() {
        
        String s="百医网";
        if(changedY==0){
            MeetNotice mn=new  MeetNotice(midlet,Centerdisplayable,container,dataSave); //会议公告
            display.setCurrent(mn);
        }else if(changedY==1){
           MeetRecollect mc=new MeetRecollect(midlet,Centerdisplayable,container,dataSave);//会议回顾
           display.setCurrent(mc);
        }else if(changedY==2){
         RelativalLiterature rl=new   RelativalLiterature(midlet,Centerdisplayable,container,dataSave);// 相关文献
         //   display.setCurrent(rl);
        }else if(changedY==3){
        Question question=new Question(midlet,Centerdisplayable,container,dataSave);//问卷调查
        //   display.setCurrent(question);
        }else if(changedY==4){
    Instead instead=new Instead(midlet,Centerdisplayable,container,dataSave);//更新
     //   display.setCurrent(instead);
       //instead.instead();
            //去掉更新类
                
         // updata = new Updata(midlet,Centerdisplayable); 
           // midlet.updata.initialize("ad");
         // midlet.updata.initialize("meetNotice");
           // midlet.updata.initialize("meetRecollect");
          //  midlet.updata.initialize("relativalLiterature");
         //   midlet. updata.initialize("question");

              
        }
            
       
        
    }
    
    
    /**
     *
     *
     * @param vector
     *            列表内容
     * @param x
     *            列表x坐标
     * @param y
     *            列表y坐标
     * @param w
     *            列表显示区域宽
     * @param h
     *            列表显示区域高
     * @param index
     *            屏幕偏移
     * @param select
     *            当前项
     * @param move
     *            数据偏移位置
     */
    
    public void drawList(Vector vector, int x, int y, int w, int h, int index,
            int select,Graphics bg) {
        bg.setFont(font);
        if (!vector.isEmpty()) {
            bg.setClip(x, y, w, h);
            String temp;
            int len = vector.size();
            
            for (int i = 0; i < len; i++) {
                temp = vector.elementAt(i).toString();
                // System.out.println("temp="+temp);
                int xx=0;
                xx=(width - font.stringWidth(temp)) / 2;
                if (select == (i - 0)) {
                    bg.setColor(0x000000);
                    bg.fillRect(0,y + (i - index - 0) * lineSpace, width,font.getHeight());
                    bg.setColor(0xffffff);
                } else {
                    bg.setColor(0);
                }
                bg.drawString(temp, xx,y + (i - index - 0) * lineSpace, 20);
                
            }
            bg.setClip(0, 0, height, height);
        }
    }
    
    
    
    
    
}