android - Validation on EditText from outside BaseAdapter class -

i have list box consist editbox in each row of listbox. on button save have check edittext object filled data or not.

this how constructed adapter listview:

public class lvadapter extends baseadapter {      activity activity;     context context;     arraylist<plist> arrayplist;      public lvadapter(context mcontext, arraylist<plist> array) {          context = mcontext;          activity = (activity) context;          arrayprestart = array;     }             @override     public int getcount() {         return arrayplist.size();     }      @override     public object getitem(int arg0) {         return arg0;     }      @override     public long getitemid(int arg0) {         return arrayplist.get(position);     }      @override     public view getview(int position, view convertview, viewgroup arg2) {         layoutinflater inflater = (layoutinflater) activity.getsystemservice(context.layout_inflater_service);         final viewholder viewholder = new viewholder();         convertview = inflater.inflate(r.layout.row_prestartcheck_list, null);         viewholder.edcomment = (edittext) convertview.findviewbyid(r.id.edcomment);         viewholder.edcomment.settag(position);         return convertview;     }    }  public class viewholder {         edittext edcomment; } 

define 1 custom method in main class check empty edittext : mainclass.java:

listview lvquestion; arraylist<plist> arrayplist = new arraylist<>(); plist plist = new plist(); btnenter.setonclicklistener(new onclicklistener() {         @override         public void onclick(view arg0) {             boolean isanyempty=true;             (int i=0; i<arrayplist.size(); i++) {                  view view =  lvquestion.getadapter().getview(i, null, null);                  edittext quantity = (edittext) view.findviewbyid(r.id.edcomment);                 quantity.requestfocus();                  quantity.seterror("asdasda");                 isanyempty=false;                 break;             }         }); } 

i have test object using settext , working fine me requestfocus , seterror not working, please figure out or give me alternate solution

you need put condition check if of edittext empty.

change method this

public boolean isempty(){     boolean isanyempty=false;     (int i=0;i<quantitychecklist.size();i++){         view view =  lvquestion.getadapter().getview(i, null, null);         edittext quantity = (edittext) view.findviewbyid(r.id.txtquantity);         if(quantity.gettext().tostring().isempty())         {             quantity.requestfocus();              quantity.seterror("asdasda");             isanyempty=true;             break;         }    }    return isanyempty; }