sdaimageutils.java

很好的UI界面源码..还有自己的输入法,可以更换风格.可以学习和使用

/*
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 */
package cn.sda.ui;

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

/**
 *
 * @author Administrator
 */
public class SDAImageUtils {

    public static int MODE_STRETCH = 0x10;
    public static int MODE_STRETCH_HORIZONTAL = 0x11;
    public static int MODE_STRETCH_VERTICAL = 0x12;
    public static int MODE_REPEAT = 0x20;
    /*
    1.将一张图片pic转换成176*208的图
    
    pic=transImage(pic,176,208);
    
    2.将一张图片pic转换成原来的两倍大
    
    pic=scaleImage(pic,2,1);
    
    3.将一张图片pic转换成原来的三分之二
    
    pic=scaleImage(pic,2,3);
    
    
     */

    private static final Image scaleImage(Image src, int scales1, int scales2) {
        return transImage(src, src.getWidth() * scales1 / scales2,
                src.getHeight() * scales1 / scales2);
    }

    private static final Image transImage(Image src, int w, int h) {
        int srcW = src.getWidth();
        int srcH = src.getHeight();
        int dstW = w, dstH = h;
        Image tmp = Image.createImage(dstW, srcH);
        Graphics g = tmp.getGraphics();
        int scale = 16;
        int delta = (srcW << scale) / dstW; //扫描长度

        int pos = delta / 2; //扫描位置

        for (int x = 0; x < dstW; x++) {
            g.setClip(x, 0, 1, srcH);
            g.drawImage(src, x - (pos >> scale), 0,
                    Graphics.LEFT | Graphics.TOP);
            pos += delta;
        }
        Image dst = Image.createImage(dstW, dstH);
        g = dst.getGraphics();
        delta = (srcH << scale) / dstH;
        pos = delta / 2;
        for (int y = 0; y < dstH; y++) {
            g.setClip(0, y, dstW, 1);
            g.drawImage(tmp, 0, y - (pos >> scale),
                    Graphics.LEFT | Graphics.TOP);
            pos += delta;
        }
        tmp = null;
        return dst;
    }

    public static Image processImage(Image img, int dstWidth, int dstHeight, int mode) {
        if (mode == MODE_STRETCH) {
            return transImage(img, dstWidth, dstHeight);
        }
        if (mode == MODE_STRETCH_HORIZONTAL) {
            return transImage(img, dstWidth, img.getHeight());
        }
        if (mode == MODE_STRETCH_VERTICAL) {
            return transImage(img, img.getWidth(), dstHeight);
        }
        if (mode == MODE_REPEAT) {
            Image result = Image.createImage(dstWidth, dstHeight);
            Graphics g = result.getGraphics();
            int icount = dstWidth / img.getWidth() + 1;
            int jcount = dstHeight / img.getHeight() + 1;
            for (int i = 0; i < icount; i++) {
                for (int j = 0; i < jcount; j++) {
                    g.drawImage(img, i * img.getWidth(), j * img.getHeight(), 0);
                }
            }
            return result;
        }
        if(mode==(MODE_STRETCH_HORIZONTAL|MODE_REPEAT))
        {
            Image result = Image.createImage(dstWidth, dstHeight);
            Graphics g = result.getGraphics();
            Image tmp=transImage(img, dstWidth, img.getHeight());
            int count = dstHeight / img.getHeight() + 1;
            for(int i=0;i<count;i++)
            {
                g.drawImage(tmp, 0, i*img.getHeight(), 0);
            }
            tmp=null;
            return result;
        }
        if(mode==(MODE_STRETCH_VERTICAL|MODE_REPEAT))
        {
            Image result = Image.createImage(dstWidth, dstHeight);
            Graphics g = result.getGraphics();
            Image tmp=transImage(img, img.getWidth(), dstHeight);
            int count = dstWidth / img.getWidth() + 1;
            for(int i=0;i<count;i++)
            {
                g.drawImage(tmp, i*img.getWidth(), 0, 0);
            }
            tmp=null;
            return result;
        }        
        return img;
    }
}