DialogFragment在setView時報 java.lang.StackOverflowError錯

本身的Fragment繼承DialogFragment，在onCreateDialog中設置AlertDialog，當用

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

builder.setView(getLayoutInflater(savedInstanceState).inflate(R.layout.my_dialog,null));

來取得本身定義好的layout時，會報 java.lang.StackOverflowError錯。用下面的方法就沒有問題：

builder.setView(((LayoutInflater)getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.my_dialog, null))