android - Kotlin：可变列表()，当我做 .add 添加模型时，它会修改以前的添加值并添加新项目

Question

私有 val 列表 = mutableListOf()

fun dataAddition() {
list.add(Feeds("1234", "Role.Driver", Message.Internal)
list.add(Feeds("1234", "Role.Supervisor", Message.Internal)
list.add(Feeds("1234", "Role.Idle", Message.Internal)
}

println(list)

Output expected:

Feeds("1234", "Role.Driver", Message.Internal), Feeds("1234", "Role.Supervisor", Message.Internal), Feeds("1234", "Role.Idle", Message.Internal)

But actual output received:

Message.Internal), Feeds("1234", "Role.Idle", Message.Internal),Message.Internal), Feeds("1234", "Role.Idle", Message.Internal),Message.Internal), Feeds("1234", "Role.Idle", Message.Internal)

如果您注意到它在列表中创建了一个新项目，但也修改了旧项目数据（例如：Role.Driver 被最后更新的值 Role.Idle 覆盖

标签： androidkotlinmutablelist