For-loop range must have an 'iterator()' method when making legend in Kotlin

klebercj — Wed, 23 Aug 2023 21:36:57 GMT

private fun showLegendDialog() {
    val dialogView = LayoutInflater.from(this).inflate(R.layout.legend_dialog, null)
    val builder = AlertDialog.Builder(this)
        .setTitle("Legend")
        .setView(dialogView)
        .setPositiveButton("Close") { dialog, _ -> dialog.dismiss() }

    val dialog = builder.create()
    dialog.show()

    val legendLayout: LinearLayout = dialogView.findViewById(R.id.legendLayout)
    val mapImageLayer = mapView.map?.operationalLayers?.get(0) as? ArcGISMapImageLayer

    mapImageLayer?.let {
        CoroutineScope(Dispatchers.Main).launch {
            for (sublayer in it.mapImageSublayers) {
                val legenddata = sublayer.fetchLegendInfos()
                for (legendInfo in legenddata) {  // error is here 
                    val legendImageView = ImageView(this@MainActivity)

                    val symbol = legendInfo.symbol
                    if (symbol != null) {
                        // Set the symbol directly to the ImageView
                        legendImageView.setImageDrawable(symbol.toDrawable(this@MainActivity))
                        legendLayout.addView(legendImageView)
                    }

                    val legendName = legendInfo.name
                    if (legendName.isNotEmpty()) {
                        val legendNameTextView = TextView(this@MainActivity)
                        legendNameTextView.text = legendName
                        legendLayout.addView(legendNameTextView)
                    }
                }
            }
        }
    }


Error is at  for (legendInfo in legenddata) Android Studio keeps throwing an error stating the "For-loop range must have an 'iterator()' method"

Re: For-loop range must have an 'iterator()' method when making legend in Kotlin

SorenRoth — Wed, 23 Aug 2023 22:52:32 GMT

fetchLegendInfos() is a suspending function and all suspending functions in the ArcGIS Maps SDK for Kotlin return a Result type. In this case the result wraps a List<LegendInfo>.

One way to get the list from the result is to write the following

val legenddata = sublayer.fetchLegendInfos().getOrThrow()

Re: For-loop range must have an 'iterator()' method when making legend in Kotlin

klebercj — Thu, 24 Aug 2023 14:36:39 GMT

This worked thank you

topic Re: For-loop range must have an 'iterator()' method when making legend in Kotlin in Kotlin Maps SDK Questions

For-loop range must have an 'iterator()' method when making legend in Kotlin

Re: For-loop range must have an 'iterator()' method when making legend in Kotlin

Re: For-loop range must have an 'iterator()' method when making legend in Kotlin