How To Force User To Enter Only Autocomplete Suggested List Item Only?

I am using Autocompltetextview and I want user to allow only to accept the value of suggested list. User should not enter other value and submit. if user did not select the value o

Solution 1:

Compare actv.getText().toString() with your adapter's values.

boolean isValid = false;
for (String suggestion : listSuggestion) {
  if (actv.getText().equalsIgnoreCase(suggestion))
    isValid = true;
}

If isValid = false, show toast.