Filter

Filter.kt

override fun getFilter(): Filter {
        return object : Filter() {
            override fun performFiltering(constraint: CharSequence?): FilterResults {
                val charString = constraint.toString()
                var searchResult: List<T> = listOf()
                if(charString.isEmpty()) {
                    searchResult = mList
                } else {
                    val filteredList = ArrayList<T>()
                    mList.forEach {row ->
                        if (row.isFilterable(charString.toLowerCase())) {
                            filteredList.add(row)
                        }
                    }
                    searchResult = filteredList
                }

                val filterResults = FilterResults()
                filterResults.values = searchResult
                return filterResults
            }

            override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
                searchList = results?.values as ArrayList<T>
                notifyDataSetChanged()
            }
        }
    }