Since Bump API closed down, I have created a different method of initiating the transfer of files. Once you have selected the files you want to transfer, there will be a "Send" button on the bottom right hand corner of the app. Press this on both phones, one person selects "Server" and the other persons enters the other user's IP address and presses "Connect".
If you liked the application, you can support the developer by purchasing and downloading the ad-free version (Simple File Transfer) for $0.99.
These programs benefit greatly from your feedback, so if you have any issues feel free to contact me through email:"firstname.lastname@example.org" before leaving a review, and I will try my best to assist you.
-WiFi file transfer.
-Preview files in your transfer list by long pressing on the file.
-View the files you have just downloaded by touching them in the list.
-Change your name by pressing the android menu button.
-If you wish to transfer via WIFI, make sure both phones are connected to the same access point.
If you want an ad-free version, there's a paid version for $0.99.
Note: Internet Connection Required.