www.pudn.com > phonebk.rar > WelcomeUI.java

/* 
 * WelcomeUI.java 
 * 
 * Created on 2006年3月22日, 上午9:24 
 * 
 * To change this template, choose Tools | Options and locate the template under 
 * the Source Creation and Management node. Right-click the template and choose 
 * Open. You can then make changes to the template in the Source Editor. 
 */ 
 
package com.j2medev.sample.phonebook; 
 
import javax.microedition.lcdui.*; 
import java.io.IOException; 
import java.util.Timer; 
import java.util.TimerTask; 
/** 
 * 
 * @author Admin 
 */ 
public class WelcomeUI extends Canvas{ 
     
  private PhoneBookMidlet midlet = null; 
   // private Displayable nextUI = null; 
    private Image img = null; 
    private int width; 
    private int height; 
    private int y = 0; 
    private Timer timer = new Timer(); 
    private Font font = null; 
    private boolean first = true; 
    private Displayable dis; 
     
     
     
    /** Creates a new instance of SplashCanvas */ 
    public WelcomeUI(PhoneBookMidlet midlet,Displayable d) { 
        this.midlet = midlet; 
        this.dis = d; 
        width = this.getWidth(); 
        height = this.getHeight(); 
        font = Font.getDefaultFont(); 
        try{ 
            img = Image.createImage("/logo.png"); 
        }catch(IOException e){ 
            e.printStackTrace(); 
        } 
        y = height/2 - img.getHeight()/2; 
         
    } 
    protected void paint(Graphics g){ 
        if(first){ 
            clearBackground(g); 
            first = false; 
        } 
        //设置裁减区域 
        g.setClip(0,y, width, 5); 
        //绘制图片 
        g.drawImage(img, width / 2, height/ 2, Graphics.HCENTER| Graphics.VCENTER); 
        //图片绘制完成后就绘画文本 
        if(y> (height+img.getHeight())/2){ 
            g.drawString("正在读取用户登录信息！！", width/2, (height+img.getHeight())/2+font.getHeight(), Graphics.HCENTER|Graphics.TOP); 
        } 
         
    } 
    protected void showNotify(){ 
        timer.schedule(new TimerTask(){ 
            public void run() { 
                repaint(); 
                //画完图片和文字后就进入下个UI 
                if(y > (height + img.getHeight())/ 2+3*font.getHeight()){ 
                    //休眠500ms 
                    try{ 
                        Thread.sleep(500); 
                    }catch(Exception ex){ 
                        ex.printStackTrace(); 
                    } 
                    dismiss(); 
                } 
                y = y + 5; 
            } 
        },0,50); 
    } 
    private void dismiss(){ 
        timer.cancel(); 
        synchronized(midlet){ 
            midlet.notify(); 
        } 
        //midlet.setCurrent(dis); 
    } 
    private void clearBackground(Graphics g){ 
        int color = g.getColor(); 
        g.setColor(0xffffff); 
        g.fillRect(0, 0, width, height); 
        g.setColor(color); 
    } 
    protected void keyPressed(int keyCode){ 
        dismiss(); 
    } 
    protected void pointerPressed(int x,int y){ 
        dismiss(); 
    } 
     
}