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我在我的RelativeLayout上有8个ImageViews。 当活动的onCreate启动方法初始化:设置随机位置ImageView在开始
private void init() {
gameFieldView = (RelativeLayout) getGameFieldView();
mainView = (LinearLayout) getMainView();
topOffset = mainView.getHeight() - gameFieldView.getHeight() - 6;
// THERE ARE 0 height and width of gameFieldView, and mainView
for (int i = 0; i < LETTERS_NUMBER; i++) {
ImageView letter = (ImageView) findViewById(R.id.e1_letter + i);
generateRandomPosition(random, letter); // When i comment this line it is ok (What kind of sorcery is this?), but i want to set random position to ImageView "letter"
}
}
现在generateRandomPosition看起来像
private void generateRandomPosition(Random random, ImageView letter) {
int height = letter.getHeight();
int width = letter.getWidth();
int top = random.nextInt(gameFieldView.getMeasuredHeight() - height - topOffset); // It obviously crashes because of IllegalArgumentException - parameter < 0 because of gameFieldView height = 0
int left = random.nextInt(gameFieldView.getMeasuredWidth() - width);
letter.layout(left, top, left + width, top + height);
}
我在做什么错?提前致谢。
upd。 顺便说一句,我试着拨打的init()在onWindowFocusChanged,它解决了与抛出:IllegalArgumentException,顶部和以正确的方式左边数的问题,但即使ImageView的letter.layout()
感谢您的提示,但我敢当然,这不是一个问题,ID的顺序是一个接一个。但是,我确切的问题是getHeight或gameFieldView的getWidth返回值大约为0。 – 2012-04-14 19:58:28