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

The AutoCompleteTextView has a method called setValidator() that takes an instance of the interface AutoCompleteTextView.Validator as parameter. AutoCompleteTextView.Validator contains isValid() with which you can check the value that has been entered, and you can "fix" this string by implementing fixText().

Seems this is the best you can get with AutoCompleteTextView, as the documentation for AutoCompleteTextView.Validator states the following:

"Since there is no foolproof way to prevent the user from leaving this View with an incorrect value in it, all we can do is try to fix it ourselves when this happens."

If your list of elements is not too long, you are probably better off using a Spinner.

****** Edit: ******

I wipped together a quick example of how you can use this, hope it 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 to 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 just returning an empty string here, so the field will be blanked,             * but you could put any kind of action here, like popping up a dialog?             *              * Whatever value you return here must be in the 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();            }        }    }}

Another alternate way(comments are mentioned inline) :

AutoCompleteTextView txt_site_name  = findViewById(R.id.some_auto_text);// Get the string array for the countriesString[] countries = getResources().getStringArray(R.array.ncr_parking_list_array);// Create the adapter and set it to the AutoCompleteTextViewArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_dropdown_item_1line, countries);// txt_site_name  is name of the AutoComplete text view. or AutoCompleteTextView txt_site_nametxt_site_name.setAdapter(adapter);txt_site_name.setValidator(new AutoCompleteTextView.Validator() {     @Override     public boolean isValid (CharSequence text){          //some logic here returns true or false based on if the text is validated          if(text == "This is what I want")               return true;          else               return false;     }     @Override     public CharSequence fixText (CharSequence invalidText){          //If .isValid() returns false then the code comes here          //do whatever way you want to fix in the users input and  return it          return "This is what I want"            }        });

Reference: AutoCompleteTextView.Validator