MainActivity.kt

override fun onLoadFinished(loader: Loader<MutableList<Bitmap>>, data: MutableList<Bitmap>?) {
    Log.d(Constants.PLATFORM_NAME, "Finishing PrintAsyncTask loader")
    loaderManager!!.destroyLoader(LOADER_NUMBER)
    val provider = findProvider()
    val context: Context = this
    var i = 0
    val listener: Result = object : Result {
        override fun success(listenerResult: Any?) {
            val response = listenerResult as HashMap<*, *>
            if (response["success"] as Boolean) {
                i++
                if (i == data!!.size) {
                    result!!.success(response)
                } else {
                    provider.print(data.slice(i..i), this, context)
                }
            } else {
                AlertDialog.Builder(context)
                    .setTitle("Erro na impressão")
                    .setMessage(response["description"] as String)
                    .setPositiveButton("Tentar novamente") { _, _ ->
                        provider.print(data!!.slice(i..i), this, context)
                    }
                    .setCancelable(false)
                    .show()
            }
        }

        override fun error(errorCode: String, errorMessage: String?, errorDetails: Any?) {
        }

        override fun notImplemented() {
        }
    }
    provider.print(data!!.slice(0..0), listener, this)
}