Java : new Filter(){} to kotlin

Question

I want to make a filter for my RecyclerView , I find how to do that in Java but I want to implement this in Kotlin , this code is placed into Adapter class.

private Filter exampleFilter = new Filter() {
    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        return null;
    }
    @Override
    protected void publishResults(CharSequence constraint , FilterResults results) {}
};

How this code can be used for kotlin? Here is the full code for Adapter class https://pastebin.com/a2dj30By

have you checked this yet? https://kotlinlang.org/docs/reference/object-declarations.html#object-expressions — user1506104, Feb 08 '19 at 18:21
use an adapter that already implements `Filterable` interface — pskink, Feb 08 '19 at 19:57
so why dont you want to use an adapter that already implements `Filterable` interface? why do you want to reinvent the wheel? — pskink, Feb 10 '19 at 07:48
so extend [this](https://gist.github.com/pskink/cd3bbdd742b5b1905a790c76831b5d85) adapter - here you have some sample [CurrencyAdapter](https://pastebin.com/raw/LEena3pM) - this is a working `Filterable` adapter that shows currency names / symbols — pskink, Feb 10 '19 at 11:12

score 4 · Accepted Answer · answered Feb 08 '19 at 18:20

private val exampleFilter = object : Filter() {
   override fun performFiltering(constraint: CharSequence): Filter.FilterResults? {
      //TODO do stuff
      return null
   }

   override fun publishResults(constraint: CharSequence, results: Filter.FilterResults) {
      //TODO do stuff
   }
}

Java : new Filter(){} to kotlin

1 Answers1