android中响应Fragment界面中的控件的问题

在 fragment中：（点击button弹出toast）

@Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
 Bundle savedInstanceState) {
 View inflate = inflater.inflate(R.layout.fragment_blank, container,
 false);
 Button btn = (Button) inflate.findViewById(R.id.button1);
 btn.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getActivity(), "这里是BlankFragment。。。",
                    Toast.LENGTH_SHORT).show();
        }
    });
    return inflate;
}