Singletone AppsharedPreference

AppSharedPreference

package com.emerico.acorreuserkotlin.utility

import android.content.Context
import android.content.SharedPreferences
 

object AppSharedPreference {

    /** How to use
       AppSharedPreference.putString(AppConstant.KEY_USER_NAME, "Shihab")
     * AppSharedPreference.getString(AppConstant.KEY_USER_NAME)
     *
     * */
    private val sharedPreferences: SharedPreferences = getApplication()
        .getSharedPreferences(APP_NAME, Context.MODE_PRIVATE)

    fun putString(key: String, value: String?) {
        removeIfValueIsNull(key, value)
        sharedPreferences.edit().putString(key, value).apply()
    }

    fun putInteger(key: String, value: Int?) {
        removeIfValueIsNull(key, value)
        if (value != null) {
            sharedPreferences.edit().putInt(key, value).apply()
        }
    }

    fun putBoolean(key: String?, value: Boolean?) {
        sharedPreferences.edit().putBoolean(key, value!!).apply()
    }

    fun getString(key: String?): String? {
        return sharedPreferences.getString(key, null)
    }

    fun getString(key: String?, setDefault: String?): String? {
        return sharedPreferences.getString(key, setDefault)
    }

    fun getInteger(key: String?): Int {
        return sharedPreferences.getInt(key, 0)
    }

    fun getInteger(key: String?, setDefault: Int): Int {
        return sharedPreferences.getInt(key, setDefault)
    }

    fun getBoolean(key: String?): Boolean {
        return sharedPreferences.getBoolean(key, false)
    }

    fun getBoolean(key: String?, setDefault: Boolean): Boolean {
        return sharedPreferences.getBoolean(key, setDefault)
    }

    fun remove(key: String?) {
        sharedPreferences.edit().remove(key).apply()
    }

    fun clearAllValues() {
        sharedPreferences.edit().clear().apply()
    }

    private fun removeIfValueIsNull(key: String, value: Any?) {
        if (value == null) {
            this.remove(key)
        }
    }
}


class AcorreUserApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        application = this

        AppSharedPreference.putString(AppConstant.KEY_USER_NAME, "Shihab")
    }

    companion object {
        private lateinit var application: AcorreUserApplication
        fun getApplication(): Application {
            return application;
        }
    }
}


object AppConstant {
     var APP_NAME: String = "AcorreUser"

     var KEY_USER_NAME: String = "USER_NAME"

}