kotlin.UninitializedPropertyAccessException: lateinit property preferences has not been initialized

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I used the code of shared preference in my multiple project and it worked correctly but now when i apply the same code in another project it stopped working. following is error

kotlin.UninitializedPropertyAccessException: lateinit property preferences has not been initialized

Shared preferences code

object AppPrefrence {
    private const val NAME = "AComputerEngineer"
    private const val MODE = Context.MODE_PRIVATE
    private lateinit var preferences: SharedPreferences

    private val user_id = Pair("user_id","")
    private val ngo_id = Pair("ngo_id","")
    private val IS_LOGIN = Pair("is_login", false)
    private val catagoryName = Pair("Catagory", "")
    private val user_phone = Pair("user_phone", "")


    fun init(context: Context) {
        preferences = context.getSharedPreferences(NAME, MODE)
    }
    //an inline function to put variable and save it
    private inline fun SharedPreferences.edit(operation: (SharedPreferences.Editor) -> Unit) {
        val editor = edit()
        operation(editor)
        editor.apply()
    }
    var userId: String
        get() = preferences.getString(user_id.first, user_id.second) ?: ""
        set(value) = preferences.edit {
            it.putString(user_id.first, value)
        }

    var ngoId: String
        get() = preferences.getString(ngo_id.first, ngo_id.second) ?: ""
        set(value) = preferences.edit {
            it.putString(ngo_id.first, value)
        }
    //SharedPreferences variables getters/setters
    var isLogin: Boolean
        get() = preferences.getBoolean(IS_LOGIN.first, IS_LOGIN.second)
        set(value) = preferences.edit {
            it.putBoolean(IS_LOGIN.first, value)
        }

    var category: String
        get() = preferences.getString(catagoryName.first, catagoryName.second) ?: ""
        set(value) = preferences.edit {
            it.putString(catagoryName.first, value)
        }

    var userPhone:String
    get() = preferences.getString(user_phone.first, user_phone.second)?:""
    set(value) = preferences.edit{
        it.putString(user_phone.first,value)
    }
}

set value in variable

   imgBtn_food?.setOnClickListener(View.OnClickListener {
                var fd = "food"
                catagoryname = fd
                AppPrefrence.category = catagoryname.toString()
                startActivity(Intent(this, Food_Ngo_Activity::class.java))
            })
kotlin sharedpreferences android
1 Answers

Before accessing the lateinit variable you should be initialized it. The initialization can be achieved in your case by calling the method init().

So your code will look like below:

AppPrefrence.init(this) // pass your context here
imgBtn_food?.setOnClickListener(View.OnClickListener {
                var fd = "food"
                catagoryname = fd
                AppPrefrence.category = catagoryname.toString()
                startActivity(Intent(this, Food_Ngo_Activity::class.java))
            })
user_32699580
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