Android Question Audio Routing

#Region  Project Attributes
    #ApplicationLabel: B4A Example
    #VersionCode: 1
    #VersionName:
    'SupportedOrientations possible values: unspecified, landscape or portrait.
    #SupportedOrientations: unspecified
    #CanInstallToExternalStorage: False
#End Region

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: True
#End Region

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Dim myMusic As MediaPlayer
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
    Dim l As Label
    l.Initialize("l")
    l.Color = Colors.Black
    l.Textcolor    = Colors.White
    l.TextSize = Activity.Height/10
    Activity.AddView(l,0,0,Activity.Width,Activity.Height)
    
    l.Text = "wired: " & isWiredHeadsetOn & _
    CRLF & _
    "Speaker: " & isSpeakerphoneOn
    
    If FirstTime Then
        myMusic.Initialize2("myMusic")
    End If
    
    playaudio
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub isWiredHeadsetOn As Boolean
    Dim r As Reflector
    r.Target = r.GetContext
    r.Target = r.RunMethod2("getSystemService", "audio", "java.lang.String")
    Return r.RunMethod("isWiredHeadsetOn")
End Sub

Sub setWiredHeadsetOn As Boolean
    Dim r As Reflector
    r.Target = r.GetContext
    r.Target = r.RunMethod2("getSystemService", "audio", "java.lang.String")
    Return r.RunMethod2("setWiredHeadsetOn", True, "java.lang.boolean")
End Sub

Sub isSpeakerphoneOn As Boolean
    Dim r As Reflector
    r.Target = r.GetContext
    r.Target = r.RunMethod2("getSystemService", "audio", "java.lang.String")
    Return r.RunMethod("isSpeakerphoneOn")
End Sub

Sub playaudio
    ToastMessageShow("Play audio", True)
    myMusic.Load(File.DirAssets, "boom.mp3")
    myMusic.Play
End Sub

Sub myMusic_Complete
    ToastMessageShow("Retry", True)
    setWiredHeadsetOn
    myMusic.Play
End Sub