public boolean isVimeoURLValid(){
  String videoID=getExtractedIdentifier();
  return videoID.length() > 0 && TextUtils.isDigitsOnly(videoID);
}

public boolean isVimeoURLValid ( ) { String videoID = getExtractedIdentifier ( ) ; return videoID . length ( ) > 0 && TextUtils . isDigitsOnly ( videoID ) ; }
check if a vimeo url has a valid identifier
