How to write into a json file in Android -


i using bundled json file in application. want read , write data json file. have listview displays available data in json , edittext user enters data. data has written json. how this?

this code...

  public class mainactivity extends activity      {         string myjsonstring;           arraylist<data> web = new arraylist<data>();           @override         protected void oncreate(bundle savedinstancestate)          {             super.oncreate(savedinstancestate);             setcontentview(r.layout.main);              jsonparser();              }            private void jsonparser()          {             // reading text file assets folder             stringbuffer sb = new stringbuffer();             bufferedreader br = null;             try {                 br = new bufferedreader(new inputstreamreader(getassets().open(                         "single.json")));                 string temp;                 while ((temp = br.readline()) != null)                     sb.append(temp);             } catch (ioexception e) {                 e.printstacktrace();             } {                 try {                     br.close(); // stop reading                 } catch (ioexception e) {                     e.printstacktrace();                 }             }              myjsonstring = sb.tostring();              // try parse json             try {                   jsonobject jsonobjmain = new jsonobject(myjsonstring);                 jsonarray jsonarray = jsonobjmain.getjsonarray("message");                  (int i=0; i<jsonarray.length(); i++) {                      jsonobject jsonobj = jsonarray.getjsonobject(i);                      // getting data individual jsonobject                      data data = new data(jsonobj.getstring("name") , jsonobj.getstring("msg"));                      web.add(data);                 }                  final customtest1 adapter = new customtest1(mainactivity.this,r.layout.list_single,web);                  final listview list = (listview)findviewbyid(r.id.list);                 list.setadapter(adapter);                  list.setonitemclicklistener(new adapterview.onitemclicklistener()                  {                      @override                     public void onitemclick(adapterview<?> parent, view view,                             int position, long id) {                          toast.maketext(mainactivity.this, "test.........", toast.length_short).show();                          adapter.notifydatasetchanged();                     }                  });               //send activity......                  final edittext et = (edittext)findviewbyid(r.id.edittext1);                 final button imb=(button)findviewbyid(r.id.btn_send);                 imb.setonclicklistener(new onclicklistener()                 {                  @override                  public void onclick(view arg0)                   {                        string str = et.gettext().tostring();                        data store = new data(et.gettext().tostring());                       web.add(store);                         toast.maketext(mainactivity.this, "you entered...."+store, toast.length_short).show();                       et.settext(" ");                       scrollmylistviewtobottom();                       adapter.notifydatasetchanged();                          }                 //screen auto scrollup....                  private void scrollmylistviewtobottom() {                         list.post(new runnable() {                             @override                             public void run() {                                 // select last row scroll view...                                 list.setselection(adapter.getcount() - 1);                             }                         });                 }});              }             catch (jsonexception e)              {                 e.printstacktrace();             }            }     }

in opinion,you parse jsonarray exist file,then add new data old jasonarray,then write new data exist file.


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