Peer-to-Peer (P2P) communications and its applications have become conventional architecture in the wired network environment. However, they have not been effectively adapted to the ensemble mobile environment which composed of various devices such as smart mobiles devices, laptops, and device with embedded software. In P2P systems, each node can act as a client and as a server at the same time and shares with others its own data. Our contribution consists in designing, implementing and testing a BitTorrent like application adapted to wireless ad-hoc networks of Android Mobile Phones. The employment of P2P protocols and applications in the platform of the ensemble mobile environment is becoming a promising solution which permits a wide number of users to share their own contents (data, audio, video, etc.) and communicate with each other without using costly and centralized network infrastructure. By using a central server, the peers will be able to get the information about the contents of other peers. Even in the absence of the Internet, the mobile devices provide users with the potential opportunity to connect in ad-hoc manner via short range wireless protocol such as Wi-Fi.