I'm looking for an Android keyboard whose sole purpose is for typing emoji. So, it doesn't need all those bells and whistles such as predictive typing, or gesture typing, or spellchecking. Just emojis.
Preferably a lightweight one that does not consume too much memory and storage.
Preferably with a key to quickly switch back to another keyboard (like the AOSP Keyboard; holding down spacebar shows the selection box to change languages, but also to change into a different keyboard). This feature is NOT necessary though. I can always pull down the notification tray to choose a different IME.