android - how to get the edit text value out of an editable listview -

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i created editable custom listview button outside listview. want save edittext value entered user on button click. edit text in base adapter class , list , button in activity class, i'm having problem accessing edit text list , code crashes because of null pointer exception

public class productslist  extends activity{  productlistadapter dataadapter; progressdialog progressdialog=null; listview listview; usersqlitedb usersqlite_obj; arraylist<products> prodlist; edittext edchemistname, edchemistaddr;  button btnsave;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.productlist);       edchemistname = (edittext) findviewbyid(r.id.edittext1);     edchemistaddr = (edittext) findviewbyid(r.id.edittext2);     btnsave =(button)findviewbyid(r.id.button1);     listview = (listview)findviewbyid(r.id.listview1);     usersqlite_obj = new usersqlitedb(this);     progressdialog = progressdialog.show(this, "saved","please wait...", true);     //  new thread() {     runonuithread(new runnable() {     public void run() {             try{                 usersqlite_obj.open();                 prodlist = new arraylist<products>();                 prodlist = usersqlite_obj.getproductslist();                 log.e("prodlist", "1");                 dataadapter = new productlistadapter(productslist.this,prodlist);                 listview.setadapter(dataadapter);                 usersqlite_obj.close();               }  catch (exception e) {                  log.d("error",e.getmessage());             }             dismissloadingdialog();     }     });    }   public void buttonclick(view v) {          for(int i=0;i<listview.getcount();i++){                 view row = listview.getchildat(i);                log.e("edittext clicked", "yes");                edittext edittext= (edittext) row.findviewbyid(r.id.ed);                if (edittext.length()>0){                    string text = edittext.gettext().tostring();                    log.e("extracted text", "text");                }         }

if u want use edittext data of listview in ur adapter class u should pass liatview in adapter class or can set adapter in activty file.


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