validation - Android, Autocomplettextview, force text to be from the entry list -

is there way force entry in autocompletetextview 1 of elements in entrylist?

i've found method called "performvalidation" im not sure does, , havent been able find documentation or examples.

the autocompletetextview has method called setvalidator() takes instance of interface autocompletetextview.validator parameter. autocompletetextview.validator contains isvalid() can check value has been entered, , can "fix" string implementing fixtext().

seems best can autocompletetextview, documentation autocompletetextview.validator states following:

"since there no foolproof way prevent user leaving view incorrect value in it, can try fix ourselves when happens."

if list of elements not long, better off using spinner.

****** edit: ******

i wipped quick example of how can use this, hope helps!

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     > <autocompletetextview       android:id="@+id/input"     android:layout_width="fill_parent"      android:layout_height="wrap_content"      /> <edittext     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="focus me validate above text"/> </linearlayout> 

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public class autocompletetextviewactivity extends activity {      string[] validwords = new string[]{"", "snowboard", "bobsleigh", "slalom"};      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);          autocompletetextview view = (autocompletetextview)findviewbyid(r.id.input);         view.setadapter(new arrayadapter<string>(this, android.r.layout.simple_dropdown_item_1line, validwords));         view.setvalidator(new validator());         view.setonfocuschangelistener(new focuslistener());     }      class validator implements autocompletetextview.validator {          @override         public boolean isvalid(charsequence text) {             log.v("test", "checking if valid: "+ text);             arrays.sort(validwords);             if (arrays.binarysearch(validwords, text.tostring()) > 0) {                 return true;             }              return false;         }          @override         public charsequence fixtext(charsequence invalidtext) {             log.v("test", "returning fixed text");              /* i'm returning empty string here, field blanked,              * put kind of action here, popping dialog?              *               * whatever value return here must in list of valid words.              */             return "";         }     }      class focuslistener implements view.onfocuschangelistener {          @override         public void onfocuschange(view v, boolean hasfocus) {             log.v("test", "focus changed");             if (v.getid() == r.id.input && !hasfocus) {                 log.v("test", "performing validation");                 ((autocompletetextview)v).performvalidation();             }         }     } }