How to save List to SharedPreferences in kotlin?

Question

In my project, I have a list of String. I want to save this List to shared preferences. Any one can help?

data class select(
    @SerializedName("items")
    var items: MutableList<String>?=null
)

Does this answer your question? [Save ArrayList to SharedPreferences](https://stackoverflow.com/questions/7057845/save-arraylist-to-sharedpreferences) — Chetan Gupta, Jan 21 '20 at 03:32

score 9 · Accepted Answer · answered Jan 21 '20 at 10:05

You can store list as Json Text in SharedPreference using Gson and then work accordingly

//saving list in Shared Preference
    fun setLists(list:ArrayList<String>){
        val gson = Gson()
        val json = gson.toJson(list)//converting list to Json
        editor.putString("LIST",json)
        editor.commit()
    }
    //getting the list from shared preference
    fun getList():ArrayList<String>{
        val gson = Gson()
        val json = preferences.getString("LIST",null)
        val type = object :TypeToken<ArrayList<String>>(){}.type//converting the json to list
        return gson.fromJson(json,type)//returning the list
    }

Don't forget to implement the Gson library in your app level gradle file

How to save List to SharedPreferences in kotlin?

1 Answers1