android - Application Crashing frequently on httprequest -

while fetching data server error frequently. past few weeks happening. sometime works , not. logcat shows error in jsonparser file while

httpclient.execute 

but unable rectify why?

exercise.java

list<namevaluepair> parametres = new arraylist<namevaluepair>();             // getting json string url             parametres.add(new basicnamevaluepair("inputchar", inputchar));                **jsonobject json = jsonparser.makehttprequest(url_display_user,                     "get", parametres);**               try {                 // checking success tag                 int success = json.getint(tag_success);                 if (success == 1) {                     // products found                     // getting array of products                     exercises = json.getjsonarray(tag_response);                     // looping through response                     (int = 0; < exercises.length(); i++) {                         jsonobject jsonobj = exercises.getjsonobject(i);                         // storing each json item in variable                         string id = jsonobj.getstring(tag_id);                         string activityname = jsonobj.getstring(tag_activity_name);                         string metvalue = jsonobj.getstring(tag_metvalue);                         // creating new hashmap                         hashmap<string, string> map = new hashmap<string, string>();                         // adding each child node hashmap key => value                         map.put(tag_id, id);                         map.put(tag_activity_name, activityname);                         map.put(tag_metvalue, metvalue);                         // adding hashlist arraylist                         exerciseitems.add(map);                      }                     return json.getstring(tag_message);                  } else {                     return json.getstring(tag_message);                 }             } catch (jsonexception e) {                 e.printstacktrace();             }             return null; 

jsonparser.java

public class jsonparser {      static inputstream = null;     static jsonobject jobj = null;     static string json = "";      // constructor     public jsonparser() {      }      // function json url     // making http post or mehtod     public jsonobject makehttprequest(string url, string method,             list<namevaluepair> params) {          // making http request         try {              // check request method             if(method == "post"){                 // request method post                 // defaulthttpclient                 defaulthttpclient httpclient = new defaulthttpclient();                 httppost httppost = new httppost(url);                 httppost.setentity(new urlencodedformentity(params));                  httpresponse httpresponse = httpclient.execute(httppost);                 httpentity httpentity = httpresponse.getentity();                 = httpentity.getcontent();                  system.out.println(is + "post");              }else if(method == "get"){                 system.out.println("1");                 // request method                 defaulthttpclient httpclient = new defaulthttpclient();                 system.out.println("2");                 string paramstring = urlencodedutils.format(params, "utf-8");                 system.out.println("3");                 url += "?" + paramstring;                 system.out.println("4");                 httpget httpget = new httpget(url);                 system.out.println("5");                  httpresponse httpresponse = httpclient.execute(httpget);                 system.out.println("6");                 httpentity httpentity = httpresponse.getentity();                 system.out.println("7");                 = httpentity.getcontent();                 system.out.println(is + "get");             }                      } catch (unsupportedencodingexception e) {             e.printstacktrace();         } catch (clientprotocolexception e) {             e.printstacktrace();         } catch (ioexception e) {             e.printstacktrace();         }          try {             bufferedreader reader = new bufferedreader(new inputstreamreader(                     is, "iso-8859-1"), 8);             stringbuilder sb = new stringbuilder();             string line = null;             while ((line = reader.readline()) != null) {                 sb.append(line + "\n");             }             is.close();             json = sb.tostring();              log.i("tagcoverts", "["+json+"]");           } catch (exception e) {             log.e("buffer error", "error converting result " + e.tostring());         }          // try parse string json object         try {             jobj = new jsonobject(json);         } catch (jsonexception e) {             log.e("json parser", "error parsing data " + e.tostring());         }          // return json string         return jobj;      }  } 

i error while fetching data

one more error

you can go httpurlconnection ssl enabled , far more secure httpclient.

public class httppostdata  extends asynctask<string, void, string>{      private string url;     private jsonobject jsonobjsend;     int mresponsecode = -1;     private object totaltime;     private long starttime;     public httppostdata(string url, jsonobject jsonobjsend) {         this.url = url;         this.jsonobjsend = jsonobjsend;     }      @override     protected string doinbackground(string... params) {           string finalresult = null;         url url = null;              httpsurlconnection urlconnection = null;             try {                 url=new url(url);                 urlconnection = (httpsurlconnection) url.openconnection();                 urlconnection.setdooutput(true);                   urlconnection.setdoinput(true);                     urlconnection.setrequestmethod("post");                   urlconnection.setusecaches(false);                   urlconnection.setconnecttimeout(500);                   urlconnection.setreadtimeout(500);                   urlconnection.setrequestproperty("content-type","application/json");                  urlconnection.connect();                     outputstreamwriter out = new   outputstreamwriter(urlconnection.getoutputstream());                 out.write(jsonobjsend.tostring());                 out.close();                  starttime = system.currenttimemillis();                  try {                     mresponsecode = urlconnection.getresponsecode();                     totaltime = system.currenttimemillis() - starttime;                     log.e("http post response code:", ""                             + mresponsecode);                 } catch (sslpeerunverifiedexception e) {                  log.e("exception", log.getstacktracestring(e));             } catch (ioexception e) {                  log.e("exception", log.getstacktracestring(e));                 log.e("http post response code(2):", ""                         + mresponsecode);             }