//创建箱子的图像
if(bmbox == null)
{
bmbox = BitmapFactory.decodeResource(getResources(), R.drawable.xxx);
bmbox = Bitmap.createScaledBitmap(bmbox, (int)(20*density), (int)(20*density),true);
}

//遍历刚体链表,判断刚体类型并且分别进行绘画
if(arrBody != null)
{
for(int i = 0;i< arrBody.size();i++)
{
Body body = arrBody.get(i);
Vec2 point = body.getPosition();
if(body.getUserData().toString().substring(0,7).equals(“FlyBall”))
drawBall(point.x,point.y,10*density);//绘画小鸟
else
drawThings(point.x,point.y);//绘画物体

}
}
drawBorder();//绘画边界
drawSlingshot();//绘画弹弓
}
private void drawThings(float x,float y)
{
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(Color.YELLOW);
x = x*10;//这里*10是因为我们要对box2d世界与屏幕之间的比例进行换算，这个比例是我们自己定义的，是上文当中的 private final static int RATE = 10;// 屏幕到现实世界的比例
y = y*10;
canvas.drawBitmap(bmbox, x-10*density, y-10*density, paint);
//canvas.drawRect(x-10*density, y-10*density, x+10*density, y+10*density, paint);
}
private void drawBall(float x,float y,float radius)
{

Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(Color.RED);
x = x*10;
y = y*10;
//canvas.drawCircle(x, y, radius, paint);
canvas.drawBitmap(bmbird, x-10*density, y-10*density, paint);
}
private void drawBorder()
{
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setAntiAlias(true);
canvas.drawRect(0,310*density,550*density,320*density,paint);
}
private void drawSlingshot(){
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
canvas.drawLine(50, 260*density, 75, 285*density, paint);
canvas.drawLine(75, 285*density, 100, 260*density, paint);
canvas.drawLine(75, 285*density, 75, 310*density, paint);
if(singleshot.y != 0)
{
paint.setColor(Color.RED);
canvas.drawLine(50, 260*density, singleshot.x, singleshot.y, paint);
canvas.drawLine(100, 260*density, singleshot.x, singleshot.y, paint);
canvas.drawBitmap(bmbird, singleshot.x-10*density, singleshot.y-10*density, paint);
}
}
}

由于网上资料太少，很多地方都是比对着Box2d的资料摸索出来的，有些地方可能理解的不够透彻，望大家谅解..代码也没有经过什么优化，大家不要歧视我..希望对大家能够有用。

源代码，想要的童鞋拿去吧..

FlyBallDemo源代码

还有入门学习一的源代码

Ball源代码

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