解决方法是在底部设置初始化的空列表和适配器，并在获取结果时调用notifyDataSetChanged。

    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
    recyclerviewItems.setLayoutManager(linearLayoutManager);
    someAdapter = new SomeAdapter(getContext(),feedList);
    recyclerviewItems.setAdapter(someAdapter);

首先初始化适配器

public void initializeComments(){
    comments = new ArrayList<>();

    comments_myRecyclerView = (RecyclerView) findViewById(R.id.comments_recycler);
    comments_mLayoutManager = new LinearLayoutManager(myContext);
    comments_myRecyclerView.setLayoutManager(comments_mLayoutManager);

    updateComments();
    getCommentsData();

}

public void updateComments(){

    comments_mAdapter = new CommentsAdapter(comments, myContext);
    comments_myRecyclerView.setAdapter(comments_mAdapter);
}

当数据集中发生变化时，只需调用updateComments方法。

添加另一个答案，因为我遇到了这个线程谷歌错误。我试图初始化一个PreferenceFragmentCompat，但我忘记在onCreatePreferences中像这样膨胀首选项XML:

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

        val inflater = LayoutInflater.from(context)
        inflater.inflate(R.layout.fragment_settings, null)
    }

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        // Missing this line here:
        //   setPreferencesFromResource(R.xml.settings, rootKey)
    }
}

这个错误一直是个谜，直到我意识到PreferenceFragmentCompat必须在内部使用RecyclerView。

在您的RecyclerView适配器类中，例如MyRecyclerViewAdapter，使用以下参数创建一个构造函数。

MyRecyclerViewAdapter(Context context, List<String> data) {
    this.mInflater = LayoutInflater.from(context); // <-- This is the line most people include me miss
    this.mData = data;
}

mData是传递给适配器的数据。如果没有要传递的数据，则该选项是可选的。 mInflater是你创建的LayoutInflater对象，你在适配器的OnCreateViewHolder函数中使用。

在此之后，您可以将适配器附加到MainActivity或主/UI线程上您想要的任何地方

MyRecyclerViewAdapter recyclerAdapter;
OurDataStuff mData;

    ....
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Like this:

        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerAdapter = new RecyclerAdapter(this, mData); //this, is the context. mData is the data you want to pass if you have any
        recyclerView.setAdapter(recyclerAdapter);
    }
   ....

解决方法是在底部设置初始化的空列表和适配器，并在获取结果时调用notifyDataSetChanged。

    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
    recyclerviewItems.setLayoutManager(linearLayoutManager);
    someAdapter = new SomeAdapter(getContext(),feedList);
    recyclerviewItems.setAdapter(someAdapter);

我遇到了同样的问题，并意识到我在从源检索数据后同时设置了LayoutManager和适配器，而不是在onCreate方法中设置这两个。

salesAdapter = new SalesAdapter(this,ordersList);
        salesView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
        salesView.setAdapter(salesAdapter);

然后将数据更改通知适配器

               //get the Orders
                Orders orders;
                JSONArray ordersArray = jObj.getJSONArray("orders");
                    for (int i = 0; i < ordersArray.length() ; i++) {
                        JSONObject orderItem = ordersArray.getJSONObject(i);
                        //populate the Order model

                        orders = new Orders(
                                orderItem.getString("order_id"),
                                orderItem.getString("customer"),
                                orderItem.getString("date_added"),
                                orderItem.getString("total"));
                        ordersList.add(i,orders);
                        salesAdapter.notifyDataSetChanged();
                    }