how to retrieve json using models in gson android? -

i'have json array below :

{   "otg": [     {       "id": "1",       "name": "forum otg nasional",       "description": "otg description",       "banner": "",       "date": "june, 18th 2015",       "time": "08:06"     }   ] } 

and want retrieve json using models using gson, models class :

import java.util.arraylist; import java.util.list; import com.google.gson.annotations.expose;  public class modelb {      @expose     private list<otg> otg = new arraylist<otg>();      public list<otg> getotg() {         return otg;     }     public void setotg(list<otg> otg) {         this.otg = otg;     }      public class otg {          @expose         private string id;         @expose         private string name;         @expose         private string description;         @expose         private string banner;         @expose         private string date;         @expose         private string time;          public string getid() {             return id;         }          public void setid(string id) {             this.id = id;         }          public string getname() {             return name;         }          public void setname(string name) {             this.name = name;         }          public string getdescription() {             return description;         }          public void setdescription(string description) {             this.description = description;         }          public string getbanner() {             return banner;         }          public void setbanner(string banner) {             this.banner = banner;         }          public string getdate() {             return date;         }          public void setdate(string date) {             this.date = date;         }          public string gettime() {             return time;         }          public void settime(string time) {             this.time = time;         }      }  } 

then below code retrieve json using model :

@override public void updatemodel(string models) {     list_model = new arraylist<modelb>();      try {         list<modelb> model = new gson().fromjson(models, new typetoken<list<modelb>>() {         }.gettype()); // cannot read line          log.d("count_check", model.size() + "");         list_model = model;     } catch (exception e) {         e.printstacktrace();         log.d("check_error", "error_home"); // display     } } 

but code can't retrieve in model list, error. solutions problem ?

remove

 @expose private list<otg> otg = new arraylist<otg>();  public list<otg> getotg() {     return otg; } public void setotg(list<otg> otg) {     this.otg = otg; } 

only

 public class modelb{      @expose     private string id;     @expose     private string name;     @expose     private string description;     @expose     private string banner;     @expose     private string date;     @expose     private string time;      public string getid() {         return id;     }      public void setid(string id) {         this.id = id;     }      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      public string getdescription() {         return description;     }      public void setdescription(string description) {         this.description = description;     }      public string getbanner() {         return banner;     }      public void setbanner(string banner) {         this.banner = banner;     }      public string getdate() {         return date;     }      public void setdate(string date) {         this.date = date;     }      public string gettime() {         return time;     }      public void settime(string time) {         this.time = time;     }  } 

then give expected array of list. otherwise if want same model have parse simple as:

modelb  gsonobj = gson.fromjson(jsonstring, modelb.class); 

then can arraylist

           arraylist<modelb> yourlist=   gsonobj.getotg();