j2me 图片像书翻页的效果

package com.book.photo; import java.io.IOException; import javax.microedition.lcdui.Graphics; import javax.microedition.lcdui.Image; import de.enough.polish.ui.Canvas; public class PhotoScreen extends Canvas implements Runnable{ private Image photo = null; private Image photoTemp= null ; private Image bg = null; public PhotoScreen(){ this.setFullScreenMode(true); try { photo = Image.createImage("/photo.png"); bg = Image.createImage("/bg.png"); } catch (IOException e) { e.printStackTrace(); } new Thread(this).start(); } private int[] resizePhoto(Image src,int w,int h){ int dest[] = new int[w*h]; int srcW = src.getWidth(); int srcH = src.getHeight(); int srcData[] = new int[srcW*srcH]; src.getRGB(srcData, 0, srcW, 0, 0, srcW, srcH); for(int i = 0;i<h;++i){ for(int j = 0; j<w ; ++j){ int srcX = j * srcW / w; int srcY = i * srcH / h; dest[j+i*w] = srcData[srcX + srcY * srcW]; } } return dest; } public int[] diPhoto(int[] src,int width,int height ,int angle){ int tempSrc[][] = new int [height][width]; for(int i=0; i<height ; ++i) System.arraycopy(src, i*width, tempSrc[i], 0, width); float increx = 1f; float increy = (float)angle/width; float x=0f,y=(float)height; for(int index=0; index<width ;++index){ if( height-(int)y -1 > 0 ){ int steps = height-(int)y -1; for(int newHeight = 0 ; newHeight < height - steps; ++newHeight){ tempSrc[newHeight][(int)x]= tempSrc[newHeight + steps][(int)x] ; } for(int len = steps ; len > 0 ; --len){ tempSrc[height - len][(int)x] = 0x00ffffff; } } x += increx; y -= increy; } for(int i=0; i<height ; ++i) System.arraycopy(tempSrc[i], 0, src, i*width, width); return src; } protected void paint(Graphics g) { if(bg != null) g.drawImage(bg, 0, 0, Graphics.TOP | Graphics.LEFT); if(photo != null) g.drawImage(photo, 0, 0, Graphics.TOP | Graphics.LEFT); if(photoTemp != null) g.drawImage(photoTemp, 0, 0, Graphics.TOP | Graphics.LEFT); } public void run() { int i = 5 ; int j = 1; while(i > 0){ int destW = (i)* photo.getWidth()/6 ; photoTemp = Image.createRGBImage(diPhoto(resizePhoto(photo,destW,photo.getHeight()),destW,photo.getHeight(),j), destW,photo.getHeight(),true); repaint(); try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } --i; j += 10; } photoTemp = null; repaint(); } protected void keyPressed(int keycode){ int key = getGameAction(keycode); if (key == FIRE){ System.out.println("Press Fire"); new Thread(this).start(); } } }