Streaming audio between external bluetooth device and Android phone

Question

I'm considering building an Android app that allows for streaming audio via bluetooth to and from the Android phone. I've read similar questions on Stackoverflow before, and based on my understanding, A2DP cannot be used as Android can't become an A2DP sink.

In theory, I believe that a profile such as HFP or HFP AG should allow for bidirectional audio streams. In the Android API, is there a way to force a bluetooth pairing to follow this profile, or does the OS decide which profile to use (such as forcing HFP only when there's a phone call going on)?

score 1 · Accepted Answer · answered Mar 01 '16 at 16:08

1

I've been able to achieve what I wanted using RFCOMM-based SPP. In order to send audio to the external device, I use the AudioRecord API to record PCM-16 audio to stream audio realtime over Bluetooth. In order to receive audio, I spawn a thread that is responsible for outputting audio to the speaker using the AudioTrack API (in streaming mode)

answered Mar 01 '16 at 16:08

Rahin

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What about other audio profiles like HFP? – Ehsan Shadi Apr 13 '21 at 08:57
So if you used SPP you will have byte-array raw data from your socket. Am I right? If the answer is yes, Did you passed the exact byte-array to the AudioTrack object? – Ehsan Shadi Apr 13 '21 at 09:42

Streaming audio between external bluetooth device and Android phone

1 Answers1