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Android 列表中的最后一项<；对象>；在RecyclerView项的特定文本视图中重复

android json

Android 列表中的最后一项<；对象>；在RecyclerView项的特定文本视图中重复,android,json,dataset,android-recyclerview,Android,Json,Dataset,Android Recyclerview,我使用对象类（publicstaticlist res；）设置从服务器获取json数据的数据。应用程序的流程如下所示 步骤1：（MainActivity.class） 从服务器获取数据 第二步： private class TabNameSync extends AsyncTask<Void, Void, String> { String BASE_URL = Config.DATA_URL; ProgressDialog nDialog;

我使用对象类（
publicstaticlist res；
）设置从服务器获取json数据的数据。应用程序的流程如下所示

步骤1：（MainActivity.class）

从服务器获取数据

第二步：

 private class TabNameSync extends AsyncTask<Void, Void, String> {
        String BASE_URL = Config.DATA_URL;
        ProgressDialog nDialog;
        HashMap<String, String> hashMapPost = new HashMap<>();

        @Override
        protected void onPreExecute() {
            nDialog = new ProgressDialog(MainActivity.this);
            nDialog.setMessage("Loading...");
            nDialog.setIndeterminate(true);
            nDialog.setCancelable(true);
            nDialog.show();
        }

        @Override

        protected String doInBackground(Void... params) {

            HttpURLConnection con = null;
            InputStream is = null;

            StringBuffer buffer;
            String bufferVariable = null;

            hashMapPost.put("tag", "onload");
            hashMapPost.put("lat", "18.71851808");
            hashMapPost.put("log", "97.74131474");

            try {
                con = (HttpURLConnection) (new URL(BASE_URL)).openConnection();
                con.setDoInput(true);
                con.setDoOutput(true);
                con.setRequestMethod("POST");
                con.connect();
                OutputStream os = con.getOutputStream();
                BufferedWriter writer = new BufferedWriter(
                        new OutputStreamWriter(os, "UTF-8"));
                writer.write(commonUtil.getPostDataString(hashMapPost));

                writer.flush();
                writer.close();
                os.close();

                buffer = new StringBuffer();
                int responseCode = con.getResponseCode();
                if (responseCode == HttpsURLConnection.HTTP_OK) {
                    is = con.getInputStream();
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));
                    String line;
                    while ((line = br.readLine()) != null)
                        buffer.append(line).append("\r\n");
                    is.close();
                }
                con.disconnect();
                bufferVariable = buffer.toString();
                return buffer.toString();
            } catch (Throwable t) {
                t.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                } catch (Throwable t) {
                }
                try {
                    if (con != null) {
                        con.disconnect();
                    }
                } catch (Throwable t) {
                }
                if (!bufferVariable.equalsIgnoreCase(" ")) {
                    try {

                        JSONArray jArray = new JSONArray(bufferVariable);
                        int jsonLength = jArray.length();

                        for (int j = 0; j < jArray.length(); j++) {

                            Restaurant_Beam item;
                            JSONObject jsonObj = jArray.getJSONObject(j);
                            item = new Restaurant_Beam();
                            item.setIG_LIKECOUNT(jsonObj.getInt(Config.LIKE));
                            item.setIG_DELIVERY(jsonObj.getInt(Config.DELIVERYTIME));
                            item.setIG_PRODUCTID(jsonObj.getString(Config.PRODUCTID));
                            item.setIG_SALES_PRICE(jsonObj.getString(Config.SALESPRICE));
                            item.setIG_VOUCHER_ID(jsonObj.getString(Config.VOUCHERID));
                            item.setIG_VOUCHEROFFER(jsonObj.getString(Config.VOUCHEROFFER));
                            item.setIG_CATEGORY_ID(jsonObj.getString(Config.CATEID));
                            item.setIG_IMAGEURL(jsonObj.getString(Config.IMGID));
                            item.setIG_PRODUCTNAME(jsonObj.getString(Config.PRODUCTNAME));
                            item.setIG_CATEGORYNAME(jsonObj.getString(Config.CATENAME));

                            Restaurant.add(item);

                            listSuperHeroes = Restaurant;

                            strTabName = jsonObj.getString("Cate Name");
                            String strProductID = jsonObj.getString("Pro_Id");
                            String strProductName = jsonObj.getString("Product_Name");
                            String strSalesPrice = jsonObj.getString("Sales Price");
                            String strVoucherId = jsonObj.getString("Voucher Id");
                            String strVoucherOffer = jsonObj.getString("voucher Offer");
                            String strCatId = jsonObj.getString("Cat Id");
                            String strImage = jsonObj.getString("Image");
                            String strLikes = jsonObj.getString("likes");
                            String strDeliveryTime = jsonObj.getString("deliverytime");
                            strDbName = jsonObj.getString("dbname");


                            tabName.add(strTabName);

                            DbName.add(strDbName);

                            if (jsonLength == jArray.length()) {
                                JSONObject jsonObj2 = jArray.getJSONObject(jsonLength - 1);
                                Config.IMAGE_URL = jsonObj2.getString("url");
                            }
                        }


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

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
            tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

            values = new ArrayList<String>();
            values = tabName;
            HashSet<String> hashSet = new HashSet<String>();
            hashSet.addAll(values);
            values.clear();
            values.addAll(hashSet);

            nDialog.dismiss();

            //    setTime_ToSlide();
            viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
            tabLayout.post(new Runnable() {
                @Override
                public void run() {
                    tabLayout.setupWithViewPager(viewPager);
                }
            });
            SharedPreferences.Editor editor = pref.edit();
            editor.putString("FIRST_TAB", values.get(1));
            editor.putString("SECOND_TAB", values.get(0));
            editor.putString("THIRD_TAB", values.get(2));
            editor.commit();

        }
    }
将所有Json数据设置为
List
class。并在MainActivity中将
列表
声明为公共静态

第三步：

 private class TabNameSync extends AsyncTask<Void, Void, String> {
        String BASE_URL = Config.DATA_URL;
        ProgressDialog nDialog;
        HashMap<String, String> hashMapPost = new HashMap<>();

        @Override
        protected void onPreExecute() {
            nDialog = new ProgressDialog(MainActivity.this);
            nDialog.setMessage("Loading...");
            nDialog.setIndeterminate(true);
            nDialog.setCancelable(true);
            nDialog.show();
        }

        @Override

        protected String doInBackground(Void... params) {

            HttpURLConnection con = null;
            InputStream is = null;

            StringBuffer buffer;
            String bufferVariable = null;

            hashMapPost.put("tag", "onload");
            hashMapPost.put("lat", "18.71851808");
            hashMapPost.put("log", "97.74131474");

            try {
                con = (HttpURLConnection) (new URL(BASE_URL)).openConnection();
                con.setDoInput(true);
                con.setDoOutput(true);
                con.setRequestMethod("POST");
                con.connect();
                OutputStream os = con.getOutputStream();
                BufferedWriter writer = new BufferedWriter(
                        new OutputStreamWriter(os, "UTF-8"));
                writer.write(commonUtil.getPostDataString(hashMapPost));

                writer.flush();
                writer.close();
                os.close();

                buffer = new StringBuffer();
                int responseCode = con.getResponseCode();
                if (responseCode == HttpsURLConnection.HTTP_OK) {
                    is = con.getInputStream();
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));
                    String line;
                    while ((line = br.readLine()) != null)
                        buffer.append(line).append("\r\n");
                    is.close();
                }
                con.disconnect();
                bufferVariable = buffer.toString();
                return buffer.toString();
            } catch (Throwable t) {
                t.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                } catch (Throwable t) {
                }
                try {
                    if (con != null) {
                        con.disconnect();
                    }
                } catch (Throwable t) {
                }
                if (!bufferVariable.equalsIgnoreCase(" ")) {
                    try {

                        JSONArray jArray = new JSONArray(bufferVariable);
                        int jsonLength = jArray.length();

                        for (int j = 0; j < jArray.length(); j++) {

                            Restaurant_Beam item;
                            JSONObject jsonObj = jArray.getJSONObject(j);
                            item = new Restaurant_Beam();
                            item.setIG_LIKECOUNT(jsonObj.getInt(Config.LIKE));
                            item.setIG_DELIVERY(jsonObj.getInt(Config.DELIVERYTIME));
                            item.setIG_PRODUCTID(jsonObj.getString(Config.PRODUCTID));
                            item.setIG_SALES_PRICE(jsonObj.getString(Config.SALESPRICE));
                            item.setIG_VOUCHER_ID(jsonObj.getString(Config.VOUCHERID));
                            item.setIG_VOUCHEROFFER(jsonObj.getString(Config.VOUCHEROFFER));
                            item.setIG_CATEGORY_ID(jsonObj.getString(Config.CATEID));
                            item.setIG_IMAGEURL(jsonObj.getString(Config.IMGID));
                            item.setIG_PRODUCTNAME(jsonObj.getString(Config.PRODUCTNAME));
                            item.setIG_CATEGORYNAME(jsonObj.getString(Config.CATENAME));

                            Restaurant.add(item);

                            listSuperHeroes = Restaurant;

                            strTabName = jsonObj.getString("Cate Name");
                            String strProductID = jsonObj.getString("Pro_Id");
                            String strProductName = jsonObj.getString("Product_Name");
                            String strSalesPrice = jsonObj.getString("Sales Price");
                            String strVoucherId = jsonObj.getString("Voucher Id");
                            String strVoucherOffer = jsonObj.getString("voucher Offer");
                            String strCatId = jsonObj.getString("Cat Id");
                            String strImage = jsonObj.getString("Image");
                            String strLikes = jsonObj.getString("likes");
                            String strDeliveryTime = jsonObj.getString("deliverytime");
                            strDbName = jsonObj.getString("dbname");


                            tabName.add(strTabName);

                            DbName.add(strDbName);

                            if (jsonLength == jArray.length()) {
                                JSONObject jsonObj2 = jArray.getJSONObject(jsonLength - 1);
                                Config.IMAGE_URL = jsonObj2.getString("url");
                            }
                        }


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

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
            tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

            values = new ArrayList<String>();
            values = tabName;
            HashSet<String> hashSet = new HashSet<String>();
            hashSet.addAll(values);
            values.clear();
            values.addAll(hashSet);

            nDialog.dismiss();

            //    setTime_ToSlide();
            viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
            tabLayout.post(new Runnable() {
                @Override
                public void run() {
                    tabLayout.setupWithViewPager(viewPager);
                }
            });
            SharedPreferences.Editor editor = pref.edit();
            editor.putString("FIRST_TAB", values.get(1));
            editor.putString("SECOND_TAB", values.get(0));
            editor.putString("THIRD_TAB", values.get(2));
            editor.commit();

        }
    }
这里我需要将
List
类值填充到Recyclerview中。由于声明为public static，我在将MainActivity作为父项的片段中设置适配器时直接调用了它

  adapter = new CardAdapter(MainActivity.res, context);
  recyclerView.setAdapter(adapter);
  adapter.notifyDataSetChanged();
但问题是，在填充RecyclerView时，我只得到最后一项重复到
列表的大小。
大小。

MainActivity（异步任务方法）：

 private class TabNameSync extends AsyncTask<Void, Void, String> {
        String BASE_URL = Config.DATA_URL;
        ProgressDialog nDialog;
        HashMap<String, String> hashMapPost = new HashMap<>();

        @Override
        protected void onPreExecute() {
            nDialog = new ProgressDialog(MainActivity.this);
            nDialog.setMessage("Loading...");
            nDialog.setIndeterminate(true);
            nDialog.setCancelable(true);
            nDialog.show();
        }

        @Override

        protected String doInBackground(Void... params) {

            HttpURLConnection con = null;
            InputStream is = null;

            StringBuffer buffer;
            String bufferVariable = null;

            hashMapPost.put("tag", "onload");
            hashMapPost.put("lat", "18.71851808");
            hashMapPost.put("log", "97.74131474");

            try {
                con = (HttpURLConnection) (new URL(BASE_URL)).openConnection();
                con.setDoInput(true);
                con.setDoOutput(true);
                con.setRequestMethod("POST");
                con.connect();
                OutputStream os = con.getOutputStream();
                BufferedWriter writer = new BufferedWriter(
                        new OutputStreamWriter(os, "UTF-8"));
                writer.write(commonUtil.getPostDataString(hashMapPost));

                writer.flush();
                writer.close();
                os.close();

                buffer = new StringBuffer();
                int responseCode = con.getResponseCode();
                if (responseCode == HttpsURLConnection.HTTP_OK) {
                    is = con.getInputStream();
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));
                    String line;
                    while ((line = br.readLine()) != null)
                        buffer.append(line).append("\r\n");
                    is.close();
                }
                con.disconnect();
                bufferVariable = buffer.toString();
                return buffer.toString();
            } catch (Throwable t) {
                t.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                } catch (Throwable t) {
                }
                try {
                    if (con != null) {
                        con.disconnect();
                    }
                } catch (Throwable t) {
                }
                if (!bufferVariable.equalsIgnoreCase(" ")) {
                    try {

                        JSONArray jArray = new JSONArray(bufferVariable);
                        int jsonLength = jArray.length();

                        for (int j = 0; j < jArray.length(); j++) {

                            Restaurant_Beam item;
                            JSONObject jsonObj = jArray.getJSONObject(j);
                            item = new Restaurant_Beam();
                            item.setIG_LIKECOUNT(jsonObj.getInt(Config.LIKE));
                            item.setIG_DELIVERY(jsonObj.getInt(Config.DELIVERYTIME));
                            item.setIG_PRODUCTID(jsonObj.getString(Config.PRODUCTID));
                            item.setIG_SALES_PRICE(jsonObj.getString(Config.SALESPRICE));
                            item.setIG_VOUCHER_ID(jsonObj.getString(Config.VOUCHERID));
                            item.setIG_VOUCHEROFFER(jsonObj.getString(Config.VOUCHEROFFER));
                            item.setIG_CATEGORY_ID(jsonObj.getString(Config.CATEID));
                            item.setIG_IMAGEURL(jsonObj.getString(Config.IMGID));
                            item.setIG_PRODUCTNAME(jsonObj.getString(Config.PRODUCTNAME));
                            item.setIG_CATEGORYNAME(jsonObj.getString(Config.CATENAME));

                            Restaurant.add(item);

                            listSuperHeroes = Restaurant;

                            strTabName = jsonObj.getString("Cate Name");
                            String strProductID = jsonObj.getString("Pro_Id");
                            String strProductName = jsonObj.getString("Product_Name");
                            String strSalesPrice = jsonObj.getString("Sales Price");
                            String strVoucherId = jsonObj.getString("Voucher Id");
                            String strVoucherOffer = jsonObj.getString("voucher Offer");
                            String strCatId = jsonObj.getString("Cat Id");
                            String strImage = jsonObj.getString("Image");
                            String strLikes = jsonObj.getString("likes");
                            String strDeliveryTime = jsonObj.getString("deliverytime");
                            strDbName = jsonObj.getString("dbname");


                            tabName.add(strTabName);

                            DbName.add(strDbName);

                            if (jsonLength == jArray.length()) {
                                JSONObject jsonObj2 = jArray.getJSONObject(jsonLength - 1);
                                Config.IMAGE_URL = jsonObj2.getString("url");
                            }
                        }


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

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            final TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
            tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

            values = new ArrayList<String>();
            values = tabName;
            HashSet<String> hashSet = new HashSet<String>();
            hashSet.addAll(values);
            values.clear();
            values.addAll(hashSet);

            nDialog.dismiss();

            //    setTime_ToSlide();
            viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager()));
            tabLayout.post(new Runnable() {
                @Override
                public void run() {
                    tabLayout.setupWithViewPager(viewPager);
                }
            });
            SharedPreferences.Editor editor = pref.edit();
            editor.putString("FIRST_TAB", values.get(1));
            editor.putString("SECOND_TAB", values.get(0));
            editor.putString("THIRD_TAB", values.get(2));
            editor.commit();

        }
    }

私有类TabNameSync扩展异步任务{
字符串BASE\u URL=Config.DATA\u URL；
恩迪亚洛；
HashMap hashMapPost=新HashMap（）；
@凌驾
受保护的void onPreExecute（）{
nDialog=新建进度对话框（MainActivity.this）；
nDialog.setMessage（“加载…”）；
nDialog.SetUndeterminate（真）；
nDialog.setCancelable（真）；
nDialog.show（）；
}
@凌驾
受保护字符串doInBackground（无效…参数）{
HttpURLConnection con=null；
InputStream=null；
字符串缓冲区；
字符串缓冲变量=null；
hashMapPost.put（“tag”、“onload”）；
hashMapPost.put（“lat”，“18.71851808”）；
hashMapPost.put（“log”，“97.74131474”）；
试一试{
con=（HttpURLConnection）（新URL（BASE_URL））.openConnection（）；
con.setDoInput（真）；
con.设置输出（真）；
con.setRequestMethod（“POST”）；
con.connect（）；
OutputStream os=con.getOutputStream（）；
BufferedWriter=新的BufferedWriter(
新的OutputStreamWriter（操作系统，“UTF-8”）；
write（commonUtil.getPostDataString（hashMapPost））；
writer.flush（）；
writer.close（）；
os.close（）；
buffer=新的StringBuffer（）；
int responseCode=con.getResponseCode（）；
if（responseCode==HttpsURLConnection.HTTP\u确定）{
is=con.getInputStream（）；
BufferedReader br=新的BufferedReader（新的InputStreamReader（is））；
弦线；
而（（line=br.readLine（））！=null）
buffer.append（line.append（“\r\n”）；
is.close（）；
}
con.disconnect（）；
bufferVariable=buffer.toString（）；
返回buffer.toString（）；
}捕获（可丢弃的t）{
t、 printStackTrace（）；
}最后{
试一试{
如果（is！=null）{
is.close（）；
}
}捕获（可丢弃的t）{
}
试一试{
如果（con！=null）{
con.disconnect（）；
}
}捕获（可丢弃的t）{
}
if（！bufferVariable.equalsIgnoreCase（“”）{
试一试{
JSONArray jArray=新的JSONArray（缓冲变量）；
int jsonLength=jArray.length（）；
对于（int j=0；jpublic static String ProductName;

public String ProductName;