Android Dialog设置宽高

Window window = getWindow();
WindowManager.LayoutParams params = window.getAttributes();
params .width = UiUtil.getDimens(R.dimen.qb_px_416);
params .height = UiUtil.getDimens(R.dimen.qb_px_416);
params.gravity = Gravity.BOTTOM;
window.setAttributes(params);

注意：必须在show()之后设置才有效果！