fragmentで、Bundleから値を取得できない

Question

下記のように、AdapterからFragmentにBundle経由でデータを送っている(putString)のですが、Fragment側でデータを取得できません。(getStringできない)
原因が不明のため、教えていただけないでしょうか。

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;


public class MultiFriendAdapter extends RecyclerView.Adapter<MultiFriendAdapter.ViewHolder> implements View.OnClickListener {

    private ArrayList<UserDataBean> userDataBeanList;
    private UserDataBean userDataBean;
    private Context context;

    public MultiFriendAdapter(ArrayList<UserDataBean> userDataBeanList, Context context) {
        this.userDataBeanList = userDataBeanList;
        this.context = context;
    }


    static class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView;
        TextView textView;
        TextView messageView;

        ViewHolder(View v) {
            super(v);
            imageView = v.findViewById(R.id.image_view);
            textView = v.findViewById(R.id.text_view);
            messageView = v.findViewById(R.id.email_view);
        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.list_items, parent, false);

        return new ViewHolder(view);

    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {
        userDataBean = userDataBeanList.get(position);
        holder.imageView.setImageResource(userDataBean.getPhotos());
        holder.textView.setText(userDataBean.getUserName());
        holder.messageView.setText(userDataBean.getMessage());

        holder.imageView.setOnClickListener(this);
        holder.textView.setOnClickListener(this);
        holder.messageView.setOnClickListener(this);
    }

    @Override
    public int getItemCount() {
        return userDataBeanList.size();
    }

    @Override
    public void onClick(View v) {
        Bundle bundle = new Bundle();
        String name = userDataBean.getUserName();
        String message = userDataBean.getMessage();
        bundle.putString("name",name);
        bundle.putString("message",message);
        TalkFragment talkFragment = new TalkFragment();
        talkFragment.setArguments(bundle);
        FragmentManager fragmentManager = ((MainActivity)context).getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.addToBackStack(null);
        fragmentTransaction.replace(R.id.container, talkFragment);
        fragmentTransaction.commit();
    }
}

import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

import java.util.ArrayList;


public class TalkFragment extends Fragment {

    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;
    public static int click_pos;
    private Activity activity;
    private UserDataBean userDataBean;

    ArrayList<UserDataBean> userDataBeanList = new ArrayList<UserDataBean>();

    public TalkFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view =  inflater.inflate(R.layout.fragment_talk, container, false);

        Bundle bundle = new Bundle();
        activity = getActivity();
        activity.setTitle(bundle.getString("name"));

        mRecyclerView = view.findViewById(R.id.my_recycler_view);

        mRecyclerView.setHasFixedSize(true);

        mLayoutManager = new LinearLayoutManager(getActivity());

        mRecyclerView.setLayoutManager(mLayoutManager);

        mAdapter = new MultiAdapter(userDataBeanList,getActivity(),mRecyclerView);
        mRecyclerView.setAdapter(mAdapter);

        //コンテキストメニューを表示
        registerForContextMenu(mRecyclerView);

        ((Button)view.findViewById(R.id.button3)).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                UserDataBean userDataBean = new UserDataBean("masa","1121",R.mipmap.ic_launcher_round);
                userDataBeanList.add(userDataBean);
                mAdapter.notifyDataSetChanged();
            }
        });

        return view;
    }

}

Answer 1

渡された Bundle を使わなければならないのに、新しく TalkFragment で Bundle を生成しているので、getString できれ

Bundle bundle = new Bundle();
activity = getActivity();
activity.setTitle(bundle.getString("name"));

ではなく、

String name = getArguments().getString("name");

で name を取得できるかと思います。

ただ、name の null チェックは忘れないように。