androidkotlinmutablemap

How to send MutableMap from activity to another with intent

I have mutable Map as private var optionsList: MutableMap<String, List<String>> = mutableMapOf() and i need to send it to another activity , i used this : 

        val optionsIntent = Intent(this@MainActivity, OptionsActivity::class.java)
        optionsIntent.putExtra(
            "optionsLi",optionsList)
        startActivity(optionsIntent)

And it gives me an error in putExtra, but I can't find anything that is like putMap or something to use.

Solution

  • Use

    private var optionsList: HashMap<String, List<String>> = hashMapOf()

    Instead of

    private var optionsList: MutableMap<String, List<String>> = mutableMapOf()

    As HashMap implements the Serializable interface, which makes it easy to add it to an intent