Design for recording and transmitting audio from Android

Question

I have two Android devices (Phone A & Phone B) and a server with a MySQL database. I want to send an audio message using a microphone, from Phone A to Phone B, through the server.

One idea is to:

• use the microphone from the Phone A
• record audio to a file in SD card
• get bytes of this file and send to server as a simple text message
• the server stores this data in the database
• Phone B will poll server and receive this data
• then write the bytes to a new file

• then play it with MediaPlayer

  1. Is this correct?
  2. Does bytes have special characters ?

Answer 1

you need to capture the audio on phone A, and send it as binary data to the server. You can use a simple POST request to do so.

The server should store that to a file, not the database -- the database should only contain the filename and path, plus an id.

Phone B polls / gets push notification about the file. Server uses ID to get filename from database and uses passthru to serve the file.