Android Question Bluetooth connection android 14

[ravi93]

Hii,
I am facing an issue to connect paired Bluetooth device in android 14, Please help me to find proper solution

Private rp As RuntimePermissions
rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
rp.CheckAndRequest("android.permission.BLUETOOTH_CONNECT")
rp.CheckAndRequest("android.permission.BLUETOOTH_SCAN")
rp.CheckAndRequest("android.permission.ACCESS_FINE_LOCATION")

Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
    If Result = True Then
        Log(rp.GetSafeDirDefaultExternal(""))
    End If

private Sub ListViewPairedDevice_ItemClick(Position As Int, Value As Object)
    Dim bluetoothMac As String = PairedDevices.Get(Value)
    device = bluetoothMac
    connecToDevice(bluetoothMac)
End Sub

'This method will try to connect selected bluetooth devices
private Sub connecToDevice(bluetoothMac As String)
    ButtonConnect.Enabled=False
    Try
        serial.Connect(bluetoothMac)
        ToastMessageShow("Device: " & device & "   connecting",False)
    Catch
        Dim ex As Exception
        ex = LastException
        Log("Exception: " & ex.Message)
        ToastMessageShow("Device not available",True)
    End Try
End Sub

Sub Serial_Connected (Success As Boolean)
    Try
        If Success Then
            Log("Device Connection Successful")
        Else
            Log("Device Connection Failed: " & LastException)
            ToastMessageShow("Device: " & device & "  not connected",True)
            timerConnect.Enabled=False
        End If
    Catch
        Log(LastException)
    End Try

    ListViewPairedDevice.Visible=False
End Sub

If i am trying to connect with paired device it throw exception is:
Device Connection Failed: (IOException) java.io.IOException: read failed, socket might closed or timeout, read ret: -1

 

[Erel]

Whenever you see code with PERMISSION_WRITE_EXTERNAL_STORAGE you immediately know that it is broken code.

Start with this example: https://www.b4x.com/android/forum/threads/b4xpages-bluetooth-chat-example.119014/#content

 

[ravi93]

Thanks for your Response.

I have already followed the link that you have shared with me, and it's helpful to me.
But now my question is, in the chat app, Bluetooth is only connected if both devices have the same application, but in my scenario, I have to connect 3rd party Bluetooth device which is not a tablet or mobile device may be some audio device so what can I do?

 

[Erel]

You cannot connect to Bluetooth devices unless they implement the RFCOMM profile. This is not the case with audio Bluetooth devices. It is the OS that takes care of managing such connections.