android alertdialog 点击其他区域消失

AlertDialog.Builder itemBuilder = new AlertDialog.Builder(this);
CharSequence[] items = { "XXX", "hahah" };
itemBuilder.setTitle("提示") // 标题
.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// click event
}
});
AlertDialog alertDialog = itemBuilder.create();
alertDialog.setCancelable(true);// 返回键可以关闭
alertDialog.setCanceledOnTouchOutside(true);// 点击其他区域消失