为什么我写出来的子View的图标是重叠的啊

private  void getChild() {
   int count = getChildCount();
   for (int i = 0; i < count - 1; i++) {
       View child = getChildAt(i + 1);
       int l = (int) (mRadius * Math.sin(Math.PI / 2 / (count - 2) * i));
       int t = (int) (mRadius * Math.cos(Math.PI / 2 / (count - 2) * i));
       int width = child.getMeasuredWidth();
       int height = child.getMeasuredHeight();
       // 如果菜单位置在底部 左下，右下
       if (mPosition == Position.LEFT_BOTTOM || mPosition == Position.RIGHT_BOTTOM) {
           t = getMeasuredHeight() - height - t;
       }
       // 右上，右下
       if (mPosition == Position.RIGHT_TOP || mPosition == Position.RIGHT_BOTTOM) {
           l = getMeasuredWidth() - width - l;
       }
       child.layout(l, t, l + width, t + height);
   }
}