Set equalizer class values to equalizer view

SetEqualizerViewValues.kt

private fun setupEqualizerView() {
  val numberOfBands = equalizer?.numberOfBands
  val lowestBandLevel = equalizer?.bandLevelRange?.get(0)
  val highestBandLevel = equalizer?.bandLevelRange?.get(1)
  val max = highestBandLevel?.minus(lowestBandLevel!!)!! 
  
  var bands = ArrayList<Integer>(0)
    // Get center frequency for each band
    (0 until numberOfBands!!)
            .map { equalizer?.getCenterFreq(it.toShort()) }
            .mapTo(bands) { Integer(it?.div(1000)!!) }

  view_eq.setBands(bands)
  view_eq.setMax(max)
  view_eq.setBandListener(this) // Activity should directly implement the listener
  view_eq.draw() // Force draw with new equalizer settings
}