Question: how to transfer files from android to raspberry pi?
Answer: Step 1: Install Bluetooth in the Raspberry Pi. ... 
Step 2: Make Android Phone Become a Bluetooth File Transfer Profile (FTP) Server. ... 
Step 3: Install Bluetooth File Transfer Profile (FTP) Client in Raspberry Pi. ... 
Step 4: Find the Bluetooth Address of the Android Phone. ... 
Step 5: Run a Pairing Agent.