Question

我正在使用ViewModel加载数据并将其设置为SwipeRefreshLayout RecyclerView

    mAdapter = NewRecyclerViewAdapter(listAct, this@MainActivity, hashMap)
    list?.adapter = mAdapter

     workViewModel.getRequests()?.observe(
                this, Observer { resource ->
                    resource?.data?.let {
                        Log.d(TAG,it.size)
                        mAdapter.setOrders(it)
                    }
                }
            )

  workViewModel = ViewModelProviders.of(
            this,
            ViewModelFactory.getInstance(activity.application)
        ).get(WorkViewModel::class.java)
                   .......


swipe_container.setOnRefreshListener {
            mAdapter.setWorkOrders(listAct)
            mAdapter.notifyDataSetChanged()
        }

我使用日志进行调试，显示大小为2。数据似乎可以成功检索，但是未设置为recyclerView。

适配器

 private var order = emptyList<Order>()
     ......
     internal fun setOrders(order: List<Order>) {
            this.order = order
            this.order.sortedBy { it.created_at }
            notifyDataSetChanged()
        }

Answer 1

您正在setOrders（）函数中设置相同的列表使用它代替函数

internal fun setOrders(orders: List<Order>) {
    this.order = orders.sortedBy { it.created_at }
    notifyDataSetChanged()
}

Answer 2

您在任何地方都使用yourRecyclerView.setAdapter(mAdapter )吗？或者更好：您是否初始化了recyclerview并设置了适配器？如果您正在使用数据绑定，请在recyclerview xml标签中检查适配器属性

RecyclerView中的ViewModel

2 个答案: