'Japanese emoticons Pro' app allows fastly inserting 顔文字 (kaomoji, Japanese smileys) to your messages everywhere. Just open the app and select a smile - it will be automatically copied to the clipboard. App can be attached to the system bar or to the search key. Simeji is also supported. Less clicks, more convenient!
Please note that it's not graphic emoticons, it is text ones. Also, because this app is not a service, it doesn't take CPU time and doesn't discharge the battery.