Android 如何在Recyclerview中制作更多节目？

我正在开发一个应用程序，其中有RecyclerView，我要做的是，当用户滚动recycler视图时，会向他们显示一个show more按钮，并单击按钮使用json从服务器加载更多数据，请帮助我

public class CDealAppListing extends Fragment {
    public static String m_DealListingURL = "http://192.168.0.110:8080/ireward/rest/json/metallica/getDealListInJSON";
    public static String s_szresult = " ";
    public ArrayList<CDealAppDatastorage> m_oDataList;
    public int[] m_n_FormImage;
    public View m_Main;
    public CRegistrationSessionManagement m_oSessionManagement;
    public String m_szMobileNumber, m_szEncryptedPassword;
    private RecyclerView m_RecyclerView;
    private RecyclerView.Adapter m_oAdapter;
    private CJsonsResponse m_oJsonsResponse;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        m_Main = inflater.inflate(R.layout.deal_app_listing, container, false);//intialize mainLayout
        new CDealDataSent().execute(m_DealListingURL);
        init();//initialize method
        return m_Main;
    }

    public void init() {
        m_n_FormImage = new int[]{
                R.drawable.amazon,
                R.drawable.whatsapp,
                R.drawable.zorpia,
                R.drawable.path,
                R.drawable.app_me,
                R.drawable.evernote,
                R.drawable.app_me};
        m_RecyclerView = (RecyclerView) m_Main.findViewById(R.id.my_recycler_view);//finding id of recyclerview
        m_RecyclerView.setItemAnimator(new DefaultItemAnimator());//setting default animation to recyclerview

        m_RecyclerView.setHasFixedSize(true);//fixing size of recyclerview
        //Layout manager for Recycler view
        m_RecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));//showing odata vertically to user.

//            m_RecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,1));
        m_oSessionManagement = new CRegistrationSessionManagement(getActivity());
        HashMap<String, String> user = m_oSessionManagement.getRegistrationDetails();
        m_szEncryptedPassword = user.get(m_oSessionManagement.s_szKEY_PASSWORD);
        m_szMobileNumber = user.get(m_oSessionManagement.s_szKEY_MOBILENUMBER);
    }

    //sending deal data to retreive response from server
    public String DealListing(String url, CRegistrationDataStorage login) {
        InputStream inputStream = null;
        m_oJsonsResponse = new CJsonsResponse();
        try {
            // 1. create HttpClient
            HttpClient httpclient = new DefaultHttpClient();
            // 2. make POST request to the given URL
            HttpPost httpPost = new HttpPost(url);
            String json = "";
            // 3. build jsonObject
            JSONObject jsonObject = new JSONObject();
            jsonObject.put("agentCode", "99999999");
            jsonObject.put("pin", "08556CB2450231B0D7235C3446B078A6");
            jsonObject.put("recordcount", "5");
            jsonObject.put("lastcountvalue", "0");
            // 4. convert JSONObject to JSON to String
            json = jsonObject.toString();
            // 5. set json to StringEntity
            StringEntity se = new StringEntity(json);
            // 6. set httpPost Entity
            httpPost.setEntity(se);
            // 7. Set some headers to inform server about the type of the content
            httpPost.setHeader("Content-type", "application/json");
            // 8. Execute POST request to the given URL
            HttpResponse httpResponse = httpclient.execute(httpPost);
            HttpEntity entity = httpResponse.getEntity();
            // 9. receive response as inputStream
            inputStream = entity.getContent();
            System.out.println("InputStream....:" + inputStream.toString());
            System.out.println("Response....:" + httpResponse.toString());

            StatusLine statusLine = httpResponse.getStatusLine();
            System.out.println("statusLine......:" + statusLine.toString());
            ////Log.d("resp_body", resp_body.toString());
            int statusCode = statusLine.getStatusCode();
            // 10. convert inputstream to string
            if (statusCode == 200) {
                // 10. convert inputstream to string
                if (inputStream != null)
                    s_szresult = m_oJsonsResponse.convertInputStreamToString(inputStream);
                //String resp_body =
                EntityUtils.toString(httpResponse.getEntity());
            } else
                s_szresult = "Did not work!";
        } catch (Exception e) {
            Log.d("InputStream", e.getLocalizedMessage());
        }
        System.out.println("resul.....:" + s_szresult);
        // 11. return s_szResult
        return s_szresult;
    }

    //  sending deal data to server and retreive response......
    class CDealDataSent extends AsyncTask<String, Void, String> {
        public JSONObject m_oResponseobject;
        public ProgressDialog m_PDialog;
        public CRegistrationDataStorage oRegisterStorage;
        public CDealAppDatastorage item;

        //      @Override
        protected void onPreExecute() {
            super.onPreExecute();
            m_PDialog = new ProgressDialog(getActivity());
            m_PDialog.setMessage("Please wait while Loading Deals...");
            m_PDialog.setCancelable(false);
            m_PDialog.show();
        }

        @Override
        protected String doInBackground(String... urls) {
            return DealListing(urls[0], oRegisterStorage);// sending data to server...

        }

        // onPostExecute displays the results of the AsyncTask.
        @Override
        protected void onPostExecute(String result) {
            m_PDialog.dismiss();
            try {
                m_oResponseobject = new JSONObject(result);// getting response from server
                final JSONArray posts = m_oResponseobject.optJSONArray("dealList");

                m_oDataList = new ArrayList<CDealAppDatastorage>();
                for (int i = 0; i < posts.length(); i++) {
                    JSONObject post = posts.getJSONObject(i);
                    item = new CDealAppDatastorage();
                    item.setM_szHeaderText(post.getString("dealname"));
                    item.setM_szsubHeaderText(post.getString("dealcode"));
                    item.setM_n_Image(m_n_FormImage[i]);
                    m_oDataList.add(item);

                }
                if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Transaction Successful")) {

                    m_oAdapter = new CDealAppListingAdapter(m_oDataList);//creating object of adapter and addd setting odata to adapter for use.
                    m_RecyclerView.setAdapter(m_oAdapter);//adding adapter to recyclerview
                } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Connection Not Available")) {
                    Toast.makeText(getActivity(), "Connection not avaliable", Toast.LENGTH_SHORT).show();
                }
                System.out.println("agentCode...." + m_szMobileNumber);
                System.out.println("password...." + m_szEncryptedPassword);

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

    }
}

public类CDealAppListing扩展片段{
公共静态字符串m_DealListingURL=”http://192.168.0.110:8080/ireward/rest/json/metallica/getDealListInJSON";
公共静态字符串s_szresult=“”；
公共ArrayList m_oDataList；
公共int[]m_n__FormImage；
公众视野；
公共注册；会话管理；会话管理；
公共字符串m_szMobileNumber，m_szEncryptedPassword；
私人回收视图m_RecyclerView；
专用回收器查看适配器m_oAdapter；
私人CJsonsResponse m_OJSONS Response；
@可空
@凌驾
CreateView上的公共视图（布局、充气机、视图组容器、捆绑包保存状态）{
m_Main=inflater.inflate（R.layout.deal_app_listing，container，false）；//初始化mainLayout
新建CDealDataSent（）.execute（m_DealListingURL）；
init（）；//初始化方法
返回m_Main；
}
公共void init（）{
m_n_FormImage=新整数[]{
R.drawable.amazon，
R.drawable.whatsapp，
R.drawable.zorpia，
R.drawable.path，
R.drawable.app\u me，
R.drawable.evernote，
R.drawable.app_me}；
m_RecyclerView=（RecyclerView）m_Main.findViewById（R.id.my_RecyclerView）；//查找RecyclerView的id
m_RecyclerView.setItemAnimator（新的DefaultItemAnimator（））；//将默认动画设置为RecyclerView
m_RecyclerView.setHasFixedSize（true）；//固定RecyclerView的大小
//回收器视图的布局管理器
m_RecyclerView.setLayoutManager（新的LinearLayoutManager（getActivity（））；//向用户垂直显示odata。
//m_RecyclerView.setLayoutManager（新的StaggedGridLayoutManager（2,1））；
m_oSessionManagement=新注册会话管理（getActivity（））；
HashMap user=m_oSessionManagement.getRegistrationDetails（）；
m_szEncryptedPassword=user.get（m_oSessionManagement.s_szKEY_PASSWORD）；
m_szMobileNumber=user.get（m_oSessionManagement.s_szKEY_MOBILENUMBER）；
}
//正在发送交易数据以从服务器检索响应
公共字符串DealListing（字符串url、凭据数据存储登录）{
InputStream InputStream=null；
m_oJsonsResponse=新的CJsonsResponse（）；
试一试{
//1.创建HttpClient
HttpClient HttpClient=新的DefaultHttpClient（）；
//2.向给定URL发出POST请求
HttpPost HttpPost=新的HttpPost（url）；
字符串json=“”；
//3.构建jsonObject
JSONObject JSONObject=新的JSONObject（）；
jsonObject.put（“代理代码”、“9999999”）；
jsonObject.put（“引脚”，“08556CB2450231B0D7235C3446B078A6”）；
jsonObject.put（“记录计数”，“5”）；
jsonObject.put（“lastcountvalue”，“0”）；
//4.将JSONObject转换为JSON转换为字符串
json=jsonObject.toString（）；
//5.将json设置为StringEntity
StringEntity se=新的StringEntity（json）；
//6.设置httpPost实体
httpPost.setEntity（se）；
//7.设置一些标题以通知服务器内容的类型
setHeader（“内容类型”、“应用程序/json”）；
//8.对给定URL执行POST请求
HttpResponse HttpResponse=httpclient.execute（httpPost）；
HttpEntity entity=httpResponse.getEntity（）；
//9.将响应作为inputStream接收
inputStream=entity.getContent（）；
System.out.println（“InputStream…”：“+InputStream.toString（））；
System.out.println（“响应：”+httpResponse.toString（））；
StatusLine StatusLine=httpResponse.getStatusLine（）；
System.out.println（“statusLine……”：“+statusLine.toString（））；
////Log.d（“resp_body”，resp_body.toString（））；
int statusCode=statusLine.getStatusCode（）；
//10.将inputstream转换为字符串
如果（状态代码==200）{
//10.将inputstream转换为字符串
如果（inputStream！=null）
s_szresult=m_oJsonsResponse.convertInputStreamToString（inputStream）；
//字符串响应体=
toString（httpResponse.getEntity（））；
}否则
s_szresult=“不起作用！”；
}捕获（例外e）{
d（“InputStream”，例如getLocalizedMessage（））；
}
System.out.println（“结果…：”+s_szresult）；
//11.返回s_szResult
返回s_szresult；
}
//正在将交易数据发送到服务器并检索响应。。。。。。
类CDealDataSent扩展了AsyncTask{
公共JSONObject m_或响应对象；
公共进步对话；
公共凭证登记数据存储或登记存储；
公共CDealAppDatastorage项；
//@覆盖
受保护的void onPreExecute（）{
super.onPreExecute（）；
m_PDialog=newprogressdialog（getActivity（））；
m_PDialog.setMessage（“加载交易时请稍候…”）；
m_PDialog.setCancelable（假）；
m_PDialog.show（）；
}
@凌驾
受保护的字符串doInBackground（字符串…URL）{
返回DealListing（URL[0]，oRegisterStorage）；//正在向服务器发送数据。。。
}
//onPostExecute显示异步任务的结果。
@凌驾
受保护的void onPostExecute（字符串结果）{
m_PDialog.discouse（）；
试一试{
m_oResponseobject=new JSONObject（result）；//从服务器获取响应
最终JSON