How to scroll to a specific list position inside AlertDialog

Question

I can successfully display an alert dialog with a list. What I'm trying to achieve is to scroll to a specific position of this list. Is there a way to do this? Below there is the code


fun createAlert(activity: Activity, mandatory: Boolean, provinceSelected: (Int) -> Unit) {
        val provinceDialog: AlertDialog.Builder = AlertDialog.Builder(activity)
        provinceDialog.setTitle(activity.getString(R.string.select_province_from_list))
        provinceDialog.setCancelable(!mandatory)
        val arrayAdapter = ArrayAdapter<String>(activity, R.layout.province_list_row_item, SubAdministrativeAreas.provincesList)
        provinceDialog.setAdapter(arrayAdapter
        ) { _, positionSelected ->
            provinceSelected(positionSelected)
        }
        
        
        /**
         * Here I should move to an adapter position
         */
        
        
        provinceDialog.show()
    }

score 2 · Accepted Answer · answered Mar 06 '21 at 13:19

You can use AlertDialog to get the list and after show you can scroll to a certain position.

Try this way it should work .

fun createAlert(activity: Activity, mandatory: Boolean, provinceSelected: (Int) -> Unit) {
    val provinceDialog: AlertDialog.Builder = AlertDialog.Builder(activity)
    provinceDialog.setTitle(activity.getString(R.string.select_province_from_list))
    provinceDialog.setCancelable(!mandatory)
    val arrayAdapter = ArrayAdapter<String>(activity, R.layout.province_list_row_item, SubAdministrativeAreas.provincesList)
    provinceDialog.setAdapter(arrayAdapter
    ) { _, positionSelected ->
        provinceSelected(positionSelected)
    }
    val dialog = provinceDialog.create()
    dialog.setOnShowListener {
            dialog.listView.smoothScrollToPosition(11)
    }
    dialog.show()
}

score 1 · Answer 2 · answered Mar 06 '21 at 11:35

1

You can retrieve the ListView an AlertDialog uses via AlertDialog.getListView().

There are then a few easy ways to scroll the list programmatically, this post seems to cover it - Programmatically scroll to a specific position in an Android ListView.

answered Mar 06 '21 at 11:35

Henry Twist

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How to scroll to a specific list position inside AlertDialog

2 Answers2