需要实现 ViewModelProvider.Factory

class MyModel(val id: String) : ViewModel() {

    class ViewModeFactory(private val id: String) : ViewModelProvider.Factory {

        override fun <T : ViewModel?> create(modelClass: Class<T>): T {
            return MyModel(id) as T
        }

    }
}

　使用我们创建的model

val myModel = ViewModelProvider(this,
    MyModel.ViewModeFactory(id)
 )[MyModel::class.java]