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标题: j2me实现触摸屏图片切换 [打印本页]

作者: AnyCallStar 时间: 2008-07-17 15:49
标题: j2me实现触摸屏图片切换
采用低级界面实现，手机触摸屏事件--图片切换。
注:你的手机必须支持触摸屏或智能手机一类.
代码如下:

import java.io.IOException;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Ticker;
import javax.microedition.lcdui.*;
public class CanvasImage extends Canvas implements CommandListener {

int start_x = 0;
int start_y = 0;
int end_x = 0;
int end_y = 0;
private String imgurl = null;
private Image im1 = null;
public CanvasImage() {
      Ticker ticker = new Ticker("欢迎使用**手机移动终端");
      this.setTicker(ticker);
      imgurl = "/6-1.png";
}

protected void paint(Graphics g) {
      try {
         im1 = Image.createImage(imgurl); //加载第一张图片
         //清屏
         g.setColor(255,255,255);
         g.fillRect(0, 0, this.getWidth(), this.getHeight());
         g.drawImage(im1, this.getWidth() / 2, this.getHeight() / 2,
                  Graphics.HCENTER | Graphics.BOTTOM);
      } catch (IOException e) {
         e.printStackTrace();
      }
}
/*
   * （非 Javadoc）鼠标点击切换图片
   * @see javax.microedition.lcdui.Canvas#pointerPressed(int, int)
   */
public void pointerPressed(int x, int y) {
      start_x = x;
      start_y = y;
      if(x > 85 && y > 55 && x  150 && y  130) {
         if (imgurl == "/6-1.png") {
            imgurl = "/6-2.png";
         } else {
            imgurl = "/6-1.png";
         }
      }
      repaint();
      this.serviceRepaints();
}

public void pointerDragged(int x, int y) {
      end_x = x;
      end_y = y;
      repaint();
}

public void pointerReleased(int x, int y) {
      end_x = x;
      end_y = y;
}
public void commandAction(Command cmd, Displayable dis) {
}


}

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