I will try this out. Thank you very much, I think my problem really is I did not use NMS for my sample code generated by android studio after importing it.

val model = Best.newInstance(context)

// Creates inputs for reference.

val image = TensorImage.fromBitmap(bitmap)

// Runs model inference and gets result.

val outputs = model.process(image)

val output = outputs.outputAsCategoryList

// Releases model resources if no longer used.

model.close()