在 SharedPreferences Between Activity 中保存和检索 http 响应列表 object

Question

我在理解 sharedPreferences 以及如何在不同活动之间保存和检索对象列表时遇到了一些麻烦。 我遵循了其他多个问题的步骤，我将在下面列出它们，但是无论我如何更改它，我都会遇到转换不匹配的问题。 我确实可以访问保存在 sharedPreference 中的列表，但我无法将其转换回 object 列表。 我执行 http 请求并将响应 object 列表保存到 sharedpreferences 并最终开始下一个意图的主要活动代码是：

    private fun getItems(authResponse: AuthResponseModel) {
            val url = "/Api/items";
    
            val formBody = FormBody.Builder()
                    .add("token", authResponse.cloverToken.toString())
                    .build()
    
            // creating request
            var request = Request.Builder()
                    .addHeader("Authorization", "Bearer " + authResponse.token.toString())
                    .url(url)
                    .post(formBody)
                    .build()
    
            var client = OkHttpClient();
            runOnUiThread{
    
                client.newCall(request).enqueue(object : Callback {
                    override fun onResponse(call: Call, response: Response) {
    
                        var response = response.body?.string();
    
                        //save auth token
                        val gson = Gson()
    
                        System.out.println("clover 2: " + gson.toJson(response));
                        val preferences = getSharedPreferences("items", MODE_PRIVATE)
                        preferences.edit().putString("items", gson.toJson(response)).commit()
    
                        val intent = Intent(this@MainActivity, OrderActivity::class.java)
                        intent.putExtra("SHOW_WELCOME", true)
                        startActivity(intent)
                        finish()
                    }
    
                })
            }
        }

我如何在其他活动中检索数据如下：

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_order)
        initialize()
        var arrayItems: List<ItemModel>;


        initPermissions()
        val itemList = getSharedPreferences("items", MODE_PRIVATE)
        val gson = Gson()
        if (itemList != null) {
            val type = object : TypeToken<List<ItemModel>>() {}.type
            arrayItems = gson.fromJson(gson.toJson(itemList), type)
            println("here items " +arrayItems.toString())

        }

        //this.items = (itemList);

    }

我需要这些项目是从 sharedpreferences 返回的 ItemModel 对象的列表。 我得到的主要错误是转换。 让我知道是否需要任何进一步的信息，我会更新我的问题。

ItemModel 代码是：

package com.robotemi.sdk.dinengo.models;

import java.util.ArrayList;

public class ItemModel {
        private String id;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    private String name;
        private String alternateName;
        private String code;
        private String priceType;
        private String unitName;
        private boolean sku;
        private boolean isRevenue;
        private boolean available;
        private boolean autoManage;
        private boolean defaultTaxRates;
        private double price;
        private double cost;
        private double stockCount;
        private int modifiedTime;

        public ItemModel() {}
        public ItemModel(ItemModel itemModel) {
            this.id = itemModel.id;
            this.name = itemModel.name;
            this.alternateName = itemModel.alternateName;
            this.code = itemModel.code;
            this.priceType = itemModel.priceType;
            this.unitName = itemModel.unitName;
            this.sku = itemModel.sku;
            this.isRevenue = itemModel.isRevenue;
            this.available = itemModel.available;

            this.autoManage = itemModel.autoManage;
            this.defaultTaxRates = itemModel.defaultTaxRates;
            this.price = itemModel.price;
            this.cost = itemModel.cost;
            this.stockCount = itemModel.stockCount;
            this.modifiedTime = itemModel.modifiedTime;
        }

        public ArrayList<ItemModel> ItemModel(ItemModel[] itemModel) {
            ArrayList items = new ArrayList<ItemModel>();
            for(int i = 0; i <itemModel.length ; i++ ){
                ItemModel item = new ItemModel();
                item.id = itemModel[i].id;
                item.name = itemModel[i].name;
                item.alternateName = itemModel[i].alternateName;
                item.code = itemModel[i].code;
                item.priceType = itemModel[i].priceType;
                item.unitName = itemModel[i].unitName;
                item.sku = itemModel[i].sku;
                item.isRevenue = itemModel[i].isRevenue;
                item.available = itemModel[i].available;
                item.autoManage = itemModel[i].autoManage;
                item.defaultTaxRates = itemModel[i].defaultTaxRates;
                item.price = itemModel[i].price;
                item.cost = itemModel[i].cost;
                item.stockCount = itemModel[i].stockCount;
                item.modifiedTime = itemModel[i].modifiedTime;
                items.add(item);
            }

            return items;

        }

}

我调查过但没有运气的其他问题列表：

如何将 List<Object> 保存到 SharedPreferences？

如何将 List<Object> 保存到 SharedPreferences？