Android Question mute audio in videoview

#Region  Project Attributes
    #ApplicationLabel: aud
    #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.


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.
   
    Dim v,v1 As VideoView
    Dim b1,b2 As Button
   
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")
   
    v.Initialize("V")

    v1.initialize("v1")
    b1.Initialize("b1")
    b2.Initialize("b2")
    b1.Text = "up"
    b2.Text = "down"
    Activity.AddView(v,0,0,50%x,50%y)
    Activity.AddView(v1,50%x,0,50%x,50%y)
    Activity.AddView(b1,0,0,10%x,10%y)
    Activity.AddView(b2,0,25%y,10%x,10%y)
    v.LoadVideo("http","rtsp://192.168.1.81:5544/DLINK")
    v1.LoadVideo("http","rtsp://192.168.1.81:5544/CAM1")
    'v.LoadVideo(File.DirRootExternal,"a.mp4")
    v.Play
    v1.Play
End Sub

Sub b1_click

Volume3(v,0)

End Sub

Sub b2_click

Volume3(v,100)

End Sub
Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub Volume3(vv As VideoView,k As Int )
   
    Dim r1, r2 As Reflector
    r1.Target = vv
    r1.Target = r1.GetField("mMediaPlayer")
   
    If r1.Target = Null Then
   
        CallSubDelayed2(Me, "Volume3", vv)
        Return
       
    End If
   
    Dim mp As MediaPlayer
    r2.Target = mp
    r2.SetField2("mp", r1.Target)
    mp.SetVolume(k,k)
   
End Sub