void application_start( )
besl_p2p_init ( &workspace, &device_details );
besl_p2p_start( &workspace );
but I don't know how to communication with Android mobile phone？
There is no specific API to communicate with Android Device.
You can refer this thread for getting more info to use Wifi Direct
p2p(WiFi Direct) in WICED-SDK-2.4.0
and you can read
Wi-Fi Peer-to-Peer | Android Developers to write your android app.
Retrieving data ...