Edittext, Onkeylistener Or Textwatcher (barcode Scanning)

I'm using a barcode scanner which inserts barcode string into an EditText in this format '12345\n'. Instead of using a search button, I want to trigger the search event by the '\n'

Solution 1:

If you clear the EditText content in the afterTextChanged(), you shouldn't have an infinite loop.

 @Override 
 public void afterTextChanged(Editable s) { 
  if (s.length > 0) {

      char lastCharacter = s.charAt(s.length() - 1); 

      if (lastCharacter == '\n') { 
       String barcode = s.subSequence(0, s.length() - 1).toString();
       myEditText.setString("");
       searchBarcode(barcode); 
      }
  }