Here I use a wifi transfer via say Dropbox on smartphones but "series"? Where did you see this setup?
Also, with WiFi direct the code is now possible but would require Android devices that have that feature.
Can we connect one phone with 2nd phn in series in wifi network and then connect 2nd phn with 3rd phn and transfer data from 1st phn to 3rd phn in this wifi series network?
Can is this possible through any serious android coding?