Android Studio默認產生Fragment

package com.edaixi.fragment;import android.content.Context;import android.net.Uri;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.edaixi.activity.R;/** * A simple {@link Fragment} subclass. * Activities that contain this fragment must implement the * {@link BlankFragment.OnFragmentInteractionListener} interface * to handle interaction events. * Use the {@link BlankFragment#newInstance} factory method to * create an instance of this fragment. * */public class BlankFragment extends Fragment {    // TODO: Rename parameter arguments, choose names that match    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER    private static final String ARG_PARAM1 = "param1";    private static final String ARG_PARAM2 = "param2";    // TODO: Rename and change types of parameters    private String mParam1;    private String mParam2;    private OnFragmentInteractionListener mListener;    /**     * Use this factory method to create a new instance of     * this fragment using the provided parameters.     *     * @param param1 Parameter 1.     * @param param2 Parameter 2.     * @return A new instance of fragment BlankFragment.     */    // TODO: Rename and change types and number of parameters    public static BlankFragment newInstance(String param1, String param2) {        BlankFragment fragment = new BlankFragment();        Bundle args = new Bundle();        args.putString(ARG_PARAM1, param1);        args.putString(ARG_PARAM2, param2);        fragment.setArguments(args);        return fragment;    }    public BlankFragment() {        // Required empty public constructor    }    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        if (getArguments() != null) {            mParam1 = getArguments().getString(ARG_PARAM1);            mParam2 = getArguments().getString(ARG_PARAM2);        }    }    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        TextView textView = new TextView(getActivity());        textView.setText(R.string.hello_blank_fragment);        return textView;    }    // TODO: Rename method, update argument and hook method into UI event    public void onButtonPressed(Uri uri) {        if (mListener != null) {            mListener.onFragmentInteraction(uri);        }    }    @Override    public void onAttach(Context context) {        super.onAttach(context);        if (context instanceof OnFragmentInteractionListener) {            mListener = (OnFragmentInteractionListener) context;        } else {            throw new RuntimeException(context.toString()                    + " must implement OnFragmentInteractionListener");        }    }    @Override    public void onDetach() {        super.onDetach();        mListener = null;    }    /**     * This interface must be implemented by activities that contain this     * fragment to allow an interaction in this fragment to be communicated     * to the activity and potentially other fragments contained in that     * activity.     * <p>     * See the Android Training lesson <a href=     * "http://developer.android.com/training/basics/fragments/communicating.html"     * >Communicating with Other Fragments</a> for more information.     */    public interface OnFragmentInteractionListener {        // TODO: Update argument type and name        void onFragmentInteraction(Uri uri);    }}