Android Question Exoplayer ayuda... help

[Enxix]

Hello.. I wanted to know if the following code is well written. since I don't have much experience handling java object.
I ask you this, because I want to extend the Exoplayer library through its classes using java object or reflection.
If I understood its use correctly, I can create a library (b4xlib) to use the methods of this library since they are documented. (https://exoplayer.dev/doc/reference/com/google/android/exoplayer2/package-summary.html)
I would appreciate any help. Thank you

Private Sub tra
    Dim jo As JavaObject = ExoTv
    Dim TrackSelector As JavaObject = jo.GetField("trackSelector")
    Dim parametros As  JavaObject
    parametros = TrackSelector.RunMethodJO("buildUponParameters", Null)
    parametros.RunMethod("setMaxVideoSizeSd",Null)
    parametros.RunMethod("build",Null)
    TrackSelector.RunMethod("setParameters", Array(parametros))
   
End Sub

 

[Erel]

What happens when you run it?

 

[Enxix]

The program works correctly, it does not give me an error.
Is the use of java object correct?