片段

Question

我有两个名为WiFiChatFragment的片段，另一个是AboutUsFrag 所以，我想从WiFiChatFragment调用AboutUsFrag，但是我已经实现了溢出菜单项，但它在替换方法时出错 这是我的WiFiChatFragment代码

public class WiFiChatFragment extends Fragment {
private View view;
private ChatManager chatManager;
private TextView chatLine;
private ListView listView;
public Animation hyperspaceJump;
public AboutUsFrag fragment=null;



public static final String TAG = "Settings";

ChatMessageAdapter adapter = null;
private List<String> items = new ArrayList<String>();
Context context;
private FragmentTransaction ft;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.fragment_chat, container, false);
    chatLine = (TextView) view.findViewById(R.id.txtChatLine);
    listView = (ListView) view.findViewById(android.R.id.list);

    hyperspaceJump = AnimationUtils.loadAnimation(getActivity(), R.anim.animation_leave);
    chatLine.startAnimation(hyperspaceJump);



    setHasOptionsMenu(true);

    adapter = new ChatMessageAdapter(getActivity(), android.R.id.text1,
            items);
    listView.setAdapter(adapter);



    view.findViewById(R.id.btn_send).setOnClickListener(
            new View.OnClickListener() {
                @Override
                public void onClick(View arg0) {
                    if (chatManager != null) {
                        chatManager.write(chatLine.getText().toString()
                                .getBytes());
                        pushMessage("Me: " + chatLine.getText().toString());
                        chatLine.setText("");
                        //chatLine.clearFocus();

                    }
                }
            });


    return view;



}
public interface MessageTarget {
    public Handler getHandler();
}
public void setChatManager(ChatManager obj) {
    chatManager = obj;
}
public void pushMessage(String readMessage) {
    adapter.add(readMessage);
    adapter.notifyDataSetChanged();
}
/**
 * ArrayAdapter to manage chat messages.
 */
public class ChatMessageAdapter extends ArrayAdapter<String> {
    List<String> messages = null;
    public ChatMessageAdapter(Context context, int textViewResourceId,
                              List<String> items) {
        super(context, textViewResourceId, items);

    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        if (v == null) {
            LayoutInflater vi = (LayoutInflater) getActivity()
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(android.R.layout.simple_list_item_1, null);
        }
        String message = items.get(position);

        if (message != null && !message.isEmpty()) {
            TextView nameText = (TextView) v
                    .findViewById(android.R.id.text1);
            if (nameText != null) {
                nameText.setText(message);
                if (message.startsWith("Me: ")) {
                    nameText.setBackgroundResource(R.drawable.out_message_bg );
                    nameText.setTextAppearance(getActivity(),
                            R.style.normalText);
                } else {
                    nameText.setBackgroundResource(R.drawable.in_message_bg );
                    nameText.setTextAppearance(getActivity(),
                            R.style.boldText);
                }
            }
        }
        return v;
    }
}


@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    // TODO Auto-generated method stub
    super.onCreateOptionsMenu(menu, inflater);
   inflater.inflate(R.menu.menu_main, menu);


}

public void replaceFragment(Fragment someFragment ) {
    FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.replace(R.id.about_frag, someFragment);
    transaction.addToBackStack(null);
    transaction.commit();
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // handle item selection
    switch (item.getItemId()) {
        case R.id.action_settings:
            // do s.th.
            return true;

        case R.id.clean:
            adapter.clear();
            return true;

        case R.id.about_us:
            fragment = new AboutUsFrag();
            replaceFragment(fragment);

            return true;
        case R.id.rating:
            return true;



        default:


            return super.onOptionsItemSelected(item);
    }
}




}

和另一个名为AboutUsFrag的类

public class AboutUsFrag extends Fragment {


    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
    }

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

        return inflater.inflate(R.layout.fragment_about_us, container, false);
    }

}

我该如何实现？

Answer 1

检查导入部分。
您需要导入

import android.support.v4.app.Fragment

我希望它有效。

Answer 2

让我们尝试

 import android.app.Fragment;

并以这种方式替换片段

getFragmentManager().beginTransaction().replace(R.id.frame_container,frgment,"fragment_id").commit();