Note: If you do not need install apk, you can try an
online emoji keyboard
: http://goo.gl/ML1j5J

it is an flat style theme keyboard that support to input emoji in everywhere, you can see the beautiful flat style keyboard UI and input emoji very convenient, if you need more keyboard Theme, Please install Keyboard Theme Manager app.

Feature:
- Flat white style keyboard UI.
- Custom keyboard font.
- Gesture slide input.
- Input Emoji in any apps, only first page of each type in free version.
- Support the suggestion of English/French/Italian/Spanish input.
- Support too much keyboard themes.
- ...

Importan Notes:

If you are S3/S2 or other samsung device and can't see black and white emoji. you can try to install an font. it is free:
- http://goo.gl/aiSx9r
- Then select font: System Setting > Display > Font Style, then select Emoji.

How to enable it?
- Open this app.
- Click the "Enable emoji keyboard", then enable the it in the system input settings.

How to set it as default keyboard:
- Open the app.
- Click the "Set default keyboard", you can change an input as default keyboard.

Why I can't see emoji?
- if your android is under 4.1, maybe you can't see any, pls contact with me.
- some part can support by android, but all apple devices can see all.