I want to parse this at https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json . Faced the problem that my program does not go into the cycle to create a list of countries. After hitting the onPostExecute block, the program gets into Exception . Tell me what's wrong?
public class MainActivity extends AppCompatActivity { ArrayList dataEntries; ListView list; public static String LOG_TAG = "my_log"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); list = (ListView) findViewById(R.id.list); new ParseAsyncTask().execute(); } private class ParseAsyncTask extends AsyncTask<Void, Void, String> { HttpURLConnection urlConnection = null; BufferedReader reader = null; String resultJson = ""; @Override protected String doInBackground(Void... params) { try { URL url = new URL("https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json"); urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.connect(); InputStream inputStream = urlConnection.getInputStream(); StringBuffer buffer = new StringBuffer(); reader = new BufferedReader(new InputStreamReader(inputStream)); String line; while ((line = reader.readLine()) != null) { buffer.append(line); } resultJson = buffer.toString(); } catch (Exception e) { e.printStackTrace(); } return resultJson; } @Override protected void onPostExecute(String strJson) { super.onPostExecute(strJson); Log.d(LOG_TAG, strJson); JSONObject dataJsonObj = null; try { JSONArray data = new JSONArray(strJson.toString()); // dataJsonObj = new JSONObject(strJson); // JSONArray object = dataJsonObj.getJSONArray(resultJson); // Log.d(LOG_TAG, "222222222222" + object); for (int i = 0; i < data.length(); i++) { JSONObject dataEntry = data.getJSONObject(i); Iterator<String> key = dataEntry.keys(); Map<String, String> entry = new HashMap<>(); while (key.hasNext()){ String nextKey = key.next(); entry.put(nextKey, dataEntry.getString(nextKey)); } dataEntries.add(entry); } } catch (JSONException e) { e.printStackTrace(); } } } Logs:
07-05 22:58:19.011 19319-19319/com.example.loc_by.newjson D/my_log: {"China":["Guangzhou","Fuzhou","Beijing","Baotou","Hohhot","Guiyang","Yinchuan","Nanjing","Changzhou","Chuzhou","Hefei","Jinan","Qingdao","Harbin","Zhaodong","Taiyuan","Xi'an","Xianyang","Shenzhen","Nanning","Zhengzhou","Xinxiang","Luohe","Luoyang","Chaoyang","Xingyi","Foshan","Haikou","Chengdu","Dongguan","Mingzhou","Chongqing","Zhuhai","Kunming","Wuhan","Xiling","Huizhou","Jiangmen","Shantou","Changxiacun","Zhongshan","Lhasa","Nanchang","Tianjin","Shanghai","Hebei","Shijiazhuang","Quanzhou","Putian","Xiamen","Chengyang","Zhangzhou","Sanming","Nanping","Baoding","Langfang","Yantai","Binzhou","Lanzhou","Yueqing","Zhongxin","Zhoushan","Hangzhou","Ningbo","Wenzhou","Changchun","Fuyang","Jieshou","Anqing","Wuhu","Shishi","Shishi","Weitang","Shenyang","Changsha","Yongjiawan","Lengshuijiang","Shijiazhuang","Xuchang","Suzhou","Xuzhou","Taizhou","Nanyang","Xinhua","Ürümqi","Yan'an Beilu","Baotao","Macao","Wuxi","Yangzhou","Baiyin","Tongren","Kunshan","Zhangjiagang","Jiangyin","Zhenjiang","Zhoukou","Anyang","Dalian","Tongcun","Shihezi","Xining","Zhangye","Qingyang","Wangsu","Anshun","Kaili","Bijie","Shuigang","Jianyuan","Jinlong","Jingdezhen","Yichang","Xiangfan","Jiayuan","Shashi","Yingjie","Huangshi","Jinhua","Zhengyuan","Langli","Hengyang","Jianning","Xiangtan","Rongxing","Xincao","Jinda","Nanlong","Xiangcheng","Nanma","Zhongxiang","Pudong","Shuitou","Zhenxing","Jinjiang","Longxun","Guanqiao","Jingfeng","Shijing","Tangbian","Jiangchuanlu","Jiaoyun","Guizhoumanzuxiang","Qingzhen","Changde","Xianning","Jiaozhou","Weifang","Tai'an","Luoxi","Guoji","Guangdong","Sijiqing","Huzhou","Panjin Shi","Daqing","Jilin City","Lianyungang","Yancheng","Yuehu","Kunshan","Taicang","Lianshui","Nantong","Jiaotong","Changshu City","Xingxiangcun","Jinsha","Jiangyan","Chaigoubu","Ma'anshan","Huainan","Haibei","Shenlong","Nangxian","Rongsheng","Changfeng","Chengqiao","Jiafu","Shenzhou","Shantou","Qingyuan","Gyari","Xinshijie","Zhaoqing","Zhanjiang","Kuicheng","Taoyuan","Jincheng","Caishen","Shiyan","Liaoyang","Xingtai","Wenchang","Wanning","Qionghai","Huilongba","Dingcheng","Baodian","Wuzhishan","Chengmai","Yinggen","Ledong","Lincheng","Baisha","Changjiang","Dongfang","Changjian","Jinmao","Yangpu","Baipo","Jiefang","Danzhou","Lingshui","Haidian","Sanya","Rongjiang","Longyan","Jinghe","Zhangjiakou","Renqiu","Yaocheng","Kaifeng","Hebi","Jiaozuo","Pingdingshan","Anshan","Dandong","Haitang","Tongchuan","Ankang","Guozhen","Shangluo","Xijing","Weinan","Yulin","Yining","Dingxi","Wuwei","Dawukou","Lishui","Quzhou","Hejiang","Handan","Qinhuangdao","Hengshui","Longxin","Wen'an","Yichun","Heihe","Jiaxing","Korla","Kuytun","Di'an","Yu'an","Mengzhou","Hulu","Yizhou","Shuliang","Shancheng","Fushun","Dashiqiao","Laonian","Shengli","Wenquan","Zhiye","Lingzhi","Zhongtang","Gucheng","Xinhua","Ninghe","Dangyang","Yizhong","Jizhou","Tianbao","Jinghai","Julong","Jiaqin","Jiayue","Dabaizhuang","Juchuan","Hexi","Jinnan","Hangu","Nankai","Hedong","Yanglou","Huawei","Hanting","Tianshi","Baiyu","Bohai","Rujia","Tongwang","Meijiang","Dagang","Baodi","Daqiuzhuang","Yuxi","Zicheng","Shaoxing","Zhoushan","Xiaoshan","Linhai","Cixi","Jinchuan","Zhaobaoshan","Tiangang","Beilun","Zhangqi","Zhenghai","Cicheng","Lishu","Chengbei","Heyi","Xikou","Jiangkou","Shunshui","Simen","Yuyao","Lanjiang","Jiangdong","Gaotang","Xiangshan","Shipu","Jinyi","Chengzhong","Yinzhou","Luoyang","Mapai","Cangnan","Jinxiangzhen","Yingjia","Pingyang","Rui'an","Tianfu","Shangtang","Yongjia","Tiancheng","Hongqiao","Furong","Wenxing","Mingxi","Jinshan","Changtu","Anzi","Xianren","Zhongxing","Guanli","Yucai","Xianjiang","Aojiang","Dongtou","Rongjiang","Jinmen","Qiantang","Baojiang","Huling","Liushi","Yuecheng","Hongyun","Longhua","Yajin","Simcun","Longgang","Yingdu","Wansong","Yuele","Nanjiang","Longhu","Ningyi","Fengling","Wuzhou","Xinchen","Jinghu","Fangzhuang","Yinfang","Cili","Angu","Feiyun","Wanquan","Kunyang","Shibei","Jiangnan","Yujing","Yishan","Xuefeng","Feilong","Shangrao","Xuexiao","Yuzhen","Huangbao","Longquan","Pizhou","Songyang","Qingtian","Chenguang","Kaiy 07-05 22:58:19.246 19319-19319/com.example.loc_by.newjson W/System.err: org.json.JSONException: Value {"China":["Guangzhou","Fuzhou","Beijing","Baotou","Hohhot","Guiyang","Yinchuan","Nanjing","Changzhou","Chuzhou","Hefei","Jinan","Qingdao","Harbin","Zhaodong","Taiyuan","Xi'an","Xianyang","Shenzhen","Nanning","Zhengzhou","Xinxiang","Luohe","Luoyang","Chaoyang","Xingyi","Foshan","Haikou","Chengdu","Dongguan","Mingzhou","Chongqing","Zhuhai","Kunming","Wuhan","Xiling","Huizhou","Jiangmen","Shantou","Changxiacun","Zhongshan","Lhasa","Nanchang","Tianjin","Shanghai","Hebei","Shijiazhuang","Quanzhou","Putian","Xiamen","Chengyang","Zhangzhou","Sanming","Nanping","Baoding","Langfang","Yantai","Binzhou","Lanzhou","Yueqing","Zhongxin","Zhoushan","Hangzhou","Ningbo","Wenzhou","Changchun","Fuyang","Jieshou","Anqing","Wuhu","Shishi","Shishi","Weitang","Shenyang","Changsha","Yongjiawan","Lengshuijiang","Shijiazhuang","Xuchang","Suzhou","Xuzhou","Taizhou","Nanyang","Xinhua","Ürümqi","Yan'an Beilu","Baotao","Macao","Wuxi","Yangzhou","Baiyin","Tongren","Kunshan","Zhangjiagang","Jiangyin","Zhenjiang","Zhoukou","Anyang","Dalian","Tongcun","Shihezi","Xining","Zhangye","Qingyang","Wangsu","Anshun","Kaili","Bijie","Shuigang","Jianyuan","Jinlong","Jingdezhen","Yichang","Xiangfan","Jiayuan","Shashi","Yingjie","Huangshi","Jinhua","Zhengyuan","Langli","Hengyang","Jianning","Xiangtan","Rongxing","Xincao","Jinda","Nanlong","Xiangcheng","Nanma","Zhongxiang","Pudong","Shuitou","Zhenxing","Jinjiang","Longxun","Guanqiao","Jingfeng","Shijing","Tangbian","Jiangchuanlu","Jiaoyun","Guizhoumanzuxiang","Qingzhen","Changde","Xianning","Jiaozhou","Weifang","Tai'an","Luoxi","Guoji","Guangdong","Sijiqing","Huzhou","Panjin Shi","Daqing","Jilin City","Lianyungang","Yancheng","Yuehu","Kunshan","Taicang","Lianshui","Nantong","Jiaotong","Changshu City","Xingxiangcun","Jinsha","Jiangyan","Chaigoubu","Ma'anshan","Huainan","Haibei","Shenlong","Nangxian","Rongsheng","Changfeng","Chengqiao","Jiafu","Shenzhou","Shantou","Qingyuan","Gyari","Xinshijie","Zhaoqing","Zhanjiang","Kuicheng","Taoyuan","Jincheng","Caishen","Shiyan","Liaoyang","Xingtai","Wenchang","Wanning","Qionghai","Huilongba","Dingcheng","Baodian","Wuzhishan","Chengmai","Yinggen","Ledong","Lincheng","Baisha","Changjiang","Dongfang","Changjian","Jinmao","Yangpu","Baipo","Jiefang","Danzhou","Lingshui","Haidian","Sanya","Rongjiang","Longyan","Jinghe","Zhangjiakou","Renqiu","Yaocheng","Kaifeng","Hebi","Jiaozuo","Pingdingshan","Anshan","Dandong","Haitang","Tongchuan","Ankang","Guozhen","Shangluo","Xijing","Weinan","Yulin","Yining","Dingxi","Wuwei","Dawukou","Lishui","Quzhou","Hejiang","Handan","Qinhuangdao","Hengshui","Longxin","Wen'an","Yichun","Heihe","Jiaxing","Korla","Kuytun","Di'an","Yu'an","Mengzhou","Hulu","Yizhou","Shuliang","Shancheng","Fushun","Dashiqiao","Laonian","Shengli","Wenquan","Zhiye","Lingzhi","Zhongtang","Gucheng","Xinhua","Ninghe","Dangyang","Yizhong","Jizhou","Tianbao","Jinghai","Julong","Jiaqin","Jiayue","Dabaizhuang","Juchuan","Hexi","Jinnan","Hangu","Nankai","Hedong","Yanglou","Huawei","Hanting","Tianshi","Baiyu","Bohai","Rujia","Tongwang","Meijiang","Dagang","Baodi","Daqiuzhuang","Yuxi","Zicheng","Shaoxing","Zhoushan","Xiaoshan","Linhai","Cixi","Jinchuan","Zhaobaoshan","Tiangang","Beilun","Zhangqi","Zhenghai","Cicheng","Lishu","Chengbei","Heyi","Xikou","Jiangkou","Shunshui","Simen","Yuyao","Lanjiang","Jiangdong","Gaotang","Xiangshan","Shipu","Jinyi","Chengzhong","Yinzhou","Luoyang","Mapai","Cangnan","Jinxiangzhen","Yingjia","Pingyang","Rui'an","Tianfu","Shangtang","Yongjia","Tiancheng","Hongqiao","Furong","Wenxing","Mingxi","Jinshan","Changtu","Anzi","Xianren","Zhongxing","Guanli","Yucai","Xianjiang","Aojiang","Dongtou","Rongjiang","Jinmen","Qiantang","Baojiang","Huling","Liushi","Yuecheng","Hongyun","Longhua","Yajin","Simcun","Longgang","Yingdu","Wansong","Yuele","Nanjiang","Longhu","Ningyi","Fengling","Wuzhou","Xinchen","Jinghu","Fangzhuang","Yinfang","Cili","Angu","Feiyun","Wanquan","Kunyang","Shibei","Jiangnan","Yujing","Yishan","Xuefeng","Feilong","Shangrao","Xuexiao","Yuzhen","Huangbao","Longquan","Pizhou","Song 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at org.json.JSON.typeMismatch(JSON.java:111) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at org.json.JSONArray.<init>(JSONArray.java:96) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at org.json.JSONArray.<init>(JSONArray.java:108) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at com.example.loc_by.newjson.MainActivity$ParseAsyncTask.onPostExecute(MainActivity.java:80) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at com.example.loc_by.newjson.MainActivity$ParseAsyncTask.onPostExecute(MainActivity.java:40) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.os.AsyncTask.finish(AsyncTask.java:660) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.os.AsyncTask.-wrap1(AsyncTask.java) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:677) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.os.Looper.loop(Looper.java:154) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6077) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at java.lang.reflect.Method.invoke(Native Method) 07-05 22:58:19.248 19319-19319/com.example.loc_by.newjson W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 07-05 22:58:19.249 19319-19319/com.example.loc_by.newjson W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) 
