Android Question Set audio path to BT device(Solved)

Nizze

Active Member
Licensed User
Hi

After searching the forum wihtout finding my ansver .

How can i set sound ??
I want to play sound in BT device and not in my phone .

But i cant find info on how to do that

i recive a audio stream like this :
B4X:
audioStream.Initialize("AudioStream", 8000, True, 16, audioStream.VOLUME_MUSIC)
Then it will "play" in the phones speaker.
How do i get it in my paired BT device ?

Br
Nizze
 

Nizze

Active Member
Licensed User
The audio routing should be handled automatically by the OS.

Does it play the music through the Bluetooth device is you play it with MediaPlayer (play a different file)?
Hi Erel
The BT device works only with audio when i use Phone , not with any Media Player .
The device is a SAVOX BTR-155 . It is a BT mic/speaker with PTT function

I found the ptt function, and it works .
B4X:
Sub Serial1_Connected (Success As Boolean)
   
    If Success Then
        ToastMessageShow("Ptt Button connected ", False)
        TestStream.Initialize(Serial1.InputStream,Serial1.OutputStream,"TestStream")
    End If
   
End Sub

Sub teststream_NewData (Buffer() As Byte)
    Dim msg As String
    msg = BytesToString(Buffer, 0, Buffer.Length, "UTF8")
   
    Select Case msg
       
        Case "+PTT=P" 'Ptt button pressed
            PTT_ON
        Case "+PTT=R" 'Ptt button relesed
            PTT_OFF   
       
    End Select
   
    'ToastMessageShow(msg, False)
End Sub
So i need to turn on this audio path like phone does
Is there anything in Phone i can use ?


// Nizze
 
Last edited:

Nizze

Active Member
Licensed User
Done some mor tests ..
But no Luck so far

B4X:
Sub StartBluetoothSco()
  Dim r As Reflector
  ToastMessageShow("Start sco", False)

  r.Target = r.GetContext
  r.Target = r.RunMethod2("getSystemService", "audio", "java.lang.String")
  r.RunMethod("startBluetoothSco")
  Log("StartBluetoothSco") '<--------------
End Sub
And in Manifest added:

B4X:
AddPermission(android.permission.BLUETOOTH)
AddPermission(android.permission.BLUETOOTH_ADMIN)
AddPermission(android.permission.MODIFY_AUDIO_SETTINGS)
Update this code .

It works !
 
Last edited:

PeterPaulGumpal

Member
Licensed User
Thanks Nizze :) Just spent the whole day yesterday around several codes but this one only worked for me:

Sub StartBluetoothSco()
Dim r As Reflector
ToastMessageShow("Start sco", False)

r.Target = r.GetContext
r.Target = r.RunMethod2("getSystemService", "audio", "java.lang.String")
r.RunMethod("startBluetoothSco")
Log("StartBluetoothSco") '<--------------
End Sub



except that I had to add these:
(Service_Create)
Service.AutomaticForegroundMode = Service.AUTOMATIC_FOREGROUND_ALWAYS


(Activity_Resume)
r.RunMethod("startBluetoothSco")


as the control of the bluetooth key (from the headset) gets overridden by Google Now after the first click (meaning I used the headset's physical button to trigger transfer of audio to the headset).
 
Top