Android精灵动画用法实例

本文实例讲述了android精灵动画用法。分享给大家供大家参考。具体如下：

elaineanimated.java文件如下：

package net.obviam.walking.model;
import android.graphics.bitmap;
import android.graphics.canvas;
import android.graphics.paint;
import android.graphics.rect;
public class elaineanimated {
  private static final string tag = elaineanimated.class.getsimplename();
  private bitmap bitmap;
  // the animation sequence
  private rect sourcerect;
  // the rectangle to be drawn from the animation bitmap
  private int framenr;
  // number of frames in animation
  private int currentframe;
  // the current frame
  private long frameticker;
  // the time of the last frame update
  private int frameperiod;
  // milliseconds between each frame (1000/fps)
  private int spritewidth;
  // the width of the sprite to calculate the cut out rectangle
  private int spriteheight;
  // the height of the sprite
  private int x;
  // the x coordinate of the object (top left of the image)
  private int y;
  // the y coordinate of the object (top left of the image)
  public elaineanimated(bitmap bitmap, int x, int y, int width, int height, int fps, int framecount) {
    this.bitmap = bitmap;
    this.x = x;
    this.y = y;
    currentframe = 0;
    framenr = framecount;
    spritewidth = bitmap.getwidth() / framecount;
    spriteheight = bitmap.getheight();
    sourcerect = new rect(0, 0, spritewidth, spriteheight);
    frameperiod = 1000 / fps;
    frameticker = 0l;
  }
  public bitmap getbitmap() {
    return bitmap;
  }
  public void setbitmap(bitmap bitmap) {
    this.bitmap = bitmap;
  }
  public rect getsourcerect() {
    return sourcerect;
  }
  public void setsourcerect(rect sourcerect) {
    this.sourcerect = sourcerect;
  }
  public int getframenr() {
    return framenr;
  }
  public void setframenr(int framenr) {
    this.framenr = framenr;
  }
  public int getcurrentframe() {
    return currentframe;
  }
  public void setcurrentframe(int currentframe) {
    this.currentframe = currentframe;
  }
  public int getframeperiod() {
    return frameperiod;
  }
  public void setframeperiod(int frameperiod) {
    this.frameperiod = frameperiod;
  }
  public int getspritewidth() {
    return spritewidth;
  }
  public void setspritewidth(int spritewidth) {
    this.spritewidth = spritewidth;
  }
  public int getspriteheight() {
    return spriteheight;
  }
  public void setspriteheight(int spriteheight) {
    this.spriteheight = spriteheight;
  }
  public int getx() {
    return x;
  }
  public void setx(int x) {
    this.x = x;
  }
  public int gety() {
    return y;
  }
  public void sety(int y) {
    this.y = y;
  }
  // the update method for elaine
  public void update(long gametime) {
    if (gametime > frameticker + frameperiod) {
      frameticker = gametime;
      // increment the frame
      currentframe++;
      if (currentframe >= framenr) {
        currentframe = 0;
      }
    }
    // define the rectangle to cut out sprite
    this.sourcerect.left = currentframe * spritewidth;
    this.sourcerect.right = this.sourcerect.left + spritewidth;
  }
  // the draw method which draws the corresponding frame
  public void draw(canvas canvas) {
    // where to draw the sprite
    rect destrect = new rect(getx(), gety(), getx() + spritewidth, gety() + spriteheight);
    canvas.drawbitmap(bitmap, sourcerect, destrect, null);
    canvas.drawbitmap(bitmap, 20, 150, null);
    paint paint = new paint();
    paint.setargb(50, 0, 255, 0);
    canvas.drawrect(20 + (currentframe * destrect.width()), 150, 20 + (currentframe * destrect.width()) + destrect.width(), 150 + destrect.height(), paint);
  }
}

希望本文所述对大家的android程序设计有所帮助。