MainActivity.java 文件源码

private void shuffleCoinPosition() {
    Random rand = new Random();
    for (Sprite whiteSprite:coinSprites) {
        float whiteDx = rand.nextInt(20)-10;
        float whiteDy = rand.nextInt(20)-10;
        float whiteX = whiteSprite.getPosition().x + whiteDx;
        float whiteY = whiteSprite.getPosition().y + whiteDy;
        if (whiteX > 800 || whiteX < 100 || whiteY > 800 || whiteY < 100){
            whiteY = rand.nextInt(800)+100;
            whiteX = rand.nextInt(800)+100;
        }
        whiteSprite.setPosition(new PointF(whiteX, whiteY));
    }

    new Timer().schedule(new TimerTask() {
        @Override
        public void run() {
            shuffleCoinPosition();
        }
    }, 500);

}