Question

我正在使用nkzawa socket-io库处理聊天应用。我已成功将消息发送到服务器并在我的日志cat中检索它们。我无法更新ui，因为适配器中没有完成get message事件。

我希望能够将基于uid的消息与我或其他人分开并正确更新ui。到目前为止，如果我在适配器或主UI中检索消息，我是否对如何使用适配器感到困惑？

这是我的适配器代码：

public class MessagesAdapter extends RecyclerView.Adapter<MessagesViewHolder> {

private static final String TAG = MessagesAdapter.class.getSimpleName();

private Context context;

private DBHelper helper;
private TingTingUser user;

private List<HomeMessage> messageList;

public MessagesAdapter(Context context, List<HomeMessage> messageList) {
    this.context = context;
    this.messageList = messageList;
    helper = new DBHelper(context);
}

@Override
public MessagesViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View msgView = LayoutInflater.from(parent.getContext()).inflate(R.layout.messages_layout, parent, false);
    return new MessagesViewHolder(msgView);
}

@Override
public void onBindViewHolder(MessagesViewHolder holder, int position) {
    HomeMessage message = messageList.get(position);
    //holder.upDateUI();
}

@Override
public int getItemCount() {
    if (messageList.size() == 0) {
        return 0;
    }
    return messageList.size();
}

public void upDateUI(String usersId) {
    user = helper.getCurrentUser(1);
    String currUid = user.getUserId();

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view = inflater.inflate(R.layout.messages_layout, null, false);

    MessagesViewHolder holder = new MessagesViewHolder(view);
    Log.d(TAG, "Uid form DB is:\t" + currUid);

    if (usersId != currUid) {
        holder.mainLayout.setGravity(Gravity.LEFT);
        holder.nameLayout.setVisibility(View.VISIBLE);
        holder.msgHolderLayout.setBackgroundResource(R.drawable.receiver_msg_bkg);
    } else {
        holder.mainLayout.setGravity(Gravity.RIGHT);
        holder.nameLayout.setVisibility(View.GONE);
        holder.msgHolderLayout.setBackgroundResource(R.drawable.sender_msg_bkg);
    }

} }

这是我检索所有套接字消息的方法：

private void getPublicMessages(){

String get_event = "cc-" + chatRoomId;

Log.d(TAG, "Get Event Name is:\t " + get_event.toString());

mSocket.on(get_event, new Emitter.Listener() {
    @Override
    public void call(final Object... args) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                try {
                    JSONObject jsonObject = (JSONObject) args[0];
                    //JSONObject dataObject = jsonObject.getJSONObject();


                    String type = jsonObject.getString("type");
                    Log.d(TAG, "Message is of type:\t" + type);

                    JSONObject contentObject = jsonObject.getJSONObject("content");

                    String userId = contentObject.getString("userId");
                    String roomId = contentObject.getString("roomId");
                    String message = contentObject.getString("message");
                    String name = contentObject.getString("name");
                    String avatar = contentObject.getString("avatar");

                    Log.d(TAG, "Get Message is:\t" + message);
                    Log.d(TAG, "roomId:\t" + roomId);
                    Log.d(TAG, "Get userId is:\t" + userId);
                    Log.d(TAG, "Get name is:\t" + name);
                    Log.d(TAG, "Get avatar is:\t" + avatar);


                    TingTingUser otherUsers = new TingTingUser(userId, "Abhiram Labhani", "Unknown");
                    HomeMessage othersHomeMessages = new HomeMessage(message, otherUsers, System.currentTimeMillis());

                    List<HomeMessage> othersList = new ArrayList<>();
                    othersList.add(othersHomeMessages);


                    Log.d(TAG, "Other Messages size is:\t " + othersList.size());

                    messageList.add(othersHomeMessages);
                    messagesAdapter.notifyDataSetChanged();

                    Log.d(TAG, "All Messages list size is:\t " + messageList.size());

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });
    }
});

}

名称，消息等值直接来自活动。我应该如何更新ui，这个适配器代码是否可行，或者我应该将此方法放在适配器中并相应地更新？谢谢大家。

使用检索的套接字消息更新Recyclerview UI

0 个答案: