未连接适配器；片段中跳过布局错误

Question

我的片段中的回收视图给我这个错误，但我无法弄清楚。关于这个问题有很多问题，但到目前为止，它们都没有解决我的问题。

这是我的片段中的一段代码：

 @Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_home, container, false);
    Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
    ((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);

    recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);

    initCollapsingToolbar();

    RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 2);
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(10), true));
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.setAdapter(adapter);

    prepareSectors();

    try {
      Glide.with(this).load(R.drawable.cover).into((ImageView) view.findViewById(R.id.backdrop));
    } catch (Exception e) {
      e.printStackTrace();
    }

    return view;
  }

Answer 1

您的适配器没有任何代码。因此，您需要实现适配器并将实例传递给回收器View。

RecyclerView.LayoutManager mLayoutManager ....
 ....
// Your adapter initialization here
adapter = new someAdapter(....);
recyclerView.setAdapter(adapter);

这将帮助你！

Answer 2

在将适配器设置为RecyclerView之前，您没有创建该适配器的

    RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 2);
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(10), true));
    recyclerView.setItemAnimator(new DefaultItemAnimator());

    // Your adapter initialization here
    adapter = new YourAdapter(getActivity(), ....);
    recyclerView.setAdapter(adapter);

更新：

从传递的上下文中获取布局浏览器。更新您的扇区适配器代码部分，如下所示：

public Context mContext; 
public List<Sector> sectorList;
LayoutInflater layoutInflater;

public SectorAdapter(Context mContext, List<Sector> sectorList) {
    this.mContext = mContext;
    this.sectorList = sectorList;
    layoutInflater = LayoutInflater.from(mContext);
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = layoutInflater.inflate(R.layout.sector_card, parent, false);
    return new MyViewHolder(itemView);
}

尝试将回收站查看代码移动到“已创建（）”

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    sectorList = new ArrayList<>(); 
    prepareSectors(); 

    RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 2);
    recyclerView.setLayoutManager(mLayoutManager);
    recyclerView.addItemDecoration(new GridSpacingItemDecoration(2, dpToPx(10), true)); 
    recyclerView.setItemAnimator(new DefaultItemAnimator()); 

    adapter = new SectorAdapter(getActivity(), sectorList);
    recyclerView.setAdapter(adapter);
}

希望这能有帮助~