无法在自定义对象的ArrayList上使用Gson保存SharedPreferences

// 定义一个自定义对象
public class MyObject {
    private String name;
    private int age;

    // 构造函数、getter和setter方法等

    // 将对象转换为JSON字符串
    public String toJson() {
        Gson gson = new Gson();
        return gson.toJson(this);
    }

    // 从JSON字符串中恢复对象
    public static MyObject fromJson(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, MyObject.class);
    }
}

// 存储对象到SharedPreferences
SharedPreferences sharedPreferences = getSharedPreferences("my_prefs", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
MyObject myObject = new MyObject("John", 25);
String json = myObject.toJson();
editor.putString("my_object", json);
editor.apply();

// 从SharedPreferences中读取对象
String savedJson = sharedPreferences.getString("my_object", "");
MyObject savedObject = MyObject.fromJson(savedJson);