How do I connect my ipad 4 to and android phone by Bluetooth

What are you attempting to do? If you are trying to transfer files,

it will not work.

Bluetooth is supported for stereo headsets/speakers, handsfree telephone

devices/headsets, some keyboards, some peer-to-peer apps from the app

store and internet tethering where provided by the carrier.

Other than this it will not connect to a phone/computer/device.

(thanks to ckuan for the wording)

Yes, the bluetooth on the iPad/iPhone is limited to just certain things as mentioned above. It is designed to use iTunes for getting music and pictures onto the device.

Any apps that can use on ipad for transferring files out via Bluetooth?

Rather then posting on the tail end of thread that has been dead for over a year and half, you really should start your own thread for this problem where it will be noticed.