Use kotlin, livedata, databinding with AudioRecordView

AudioRecordView.kt

// DON't forget this, otherwise it won't work
// In your activity
binding.lifecycleOwner = this

// create a binding adapter
@BindingAdapter("update")
fun setAmplitude(audioRecordView: AudioRecordView, data: Int) {
    if (data == -1) audioRecordView.recreate()
    else audioRecordView.update(data)
}

// and in XML:

<com.visualizer.amplitude.AudioRecordView
        .
        .
        .
        app:update="@{viewModel.amplitudeLiveData}"
        .
        .
        .
/>

// and to set liveData value:

private val _amplitudeLiveData = MutableLiveData<Int>(0)
val amplitudeLiveData: LiveData<Int>
    get() = _amplitudeLiveData


    private var tickerChannel: ReceiveChannel<Unit>? = null
    private fun emitAmplitude(enable: Boolean) {
        if (enable) {
            tickerChannel = ticker(delayMillis = 100, initialDelayMillis = 0)
            _amplitudeLiveData.value = -1
            GlobalScope.launch {
                for (event in tickerChannel!!) {
                    recorder?.maxAmplitude?.run { _amplitudeLiveData.postValue(this) }
                }
            }
        } else {
            tickerChannel?.cancel()
            tickerChannel = null
        }
    }