如何设置回收器的单击侦听器查看列表项是异类的

Question

我有一个带有 2 种视图的回收器视图，用于显示 2 种类型的项目我想在项目中的子 itme 上实现点击侦听器现有的解决方案表明Viewholder类应该在适配器内部实现为静态的，但是我已经在Sepearte文件中声明了它们（建议的教程），所以我无法在视图持有者上实现 onlick 侦听器我的视座1类是

    public  class ViewHolder1 extends RecyclerView.ViewHolder {
    private TextView label1, label2;
    public ImageView postImage;
    public ViewHolder1(View v) {
        super(v);
        label1 = (TextView) v.findViewById(R.id.text11);
        label2 = (TextView) v.findViewById(R.id.text22);
        postImage = (ImageView) v.findViewById(R.id.dummyImage);
    }

    public TextView getLabel1() {
        return label1;
    }
    public void setLabel1(TextView label1) {
        this.label1 = label1;
    }
    public TextView getLabel2() {
        return label2;
    }
    public void setLabel2(TextView label2) {
        this.label2 = label2;
    }
}

视图持有者 2 是

   public  class ViewHolder2 extends RecyclerView.ViewHolder {
    private ImageView ivExample;
    public ViewHolder2(View v) {
        super(v);
        ivExample = (ImageView) v.findViewById(R.id.ivExample);
    }
    public ImageView getImageView() {
        return ivExample;
    }
    public void setImageView(ImageView ivExample) {
        this.ivExample = ivExample;
    }
}

适配器是

public class ComplexRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {


    // The items to display in your RecyclerView
    private List<Object> items;
    private final int USER = 0, IMAGE = 1;
    // Provide a suitable constructor (depends on the kind of dataset)
    public ComplexRecyclerViewAdapter(List<Object> items) {
        this.items = items;
    }
    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return this.items.size();
    }
    @Override
    public int getItemViewType(int position) {
        if (items.get(position) instanceof User) {
            return USER;
        } else if (items.get(position) instanceof String) {
            return IMAGE;
        }
        return -1;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        RecyclerView.ViewHolder viewHolder;
        LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
        switch (viewType) {
            case USER:
                View v1 = inflater.inflate(R.layout.layout_viewholder1, viewGroup, false);
                viewHolder = new ViewHolder1(v1);
                break;
            case IMAGE:
                View v2 = inflater.inflate(R.layout.layout_viewholder2, viewGroup, false);
                viewHolder = new ViewHolder2(v2);
                break;
            default:
                View v3 = inflater.inflate(R.layout.layout_viewholder2, viewGroup, false);
                viewHolder = new ViewHolder2(v3);
                break;
        }
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, final int position) {
        switch (viewHolder.getItemViewType()) {
            case USER:
                ViewHolder1 vh1 = (ViewHolder1) viewHolder;
                configureViewHolder1(vh1, position);
                break;
            case IMAGE:
                ViewHolder2 vh2 = (ViewHolder2) viewHolder;
                configureViewHolder2(vh2);
                break;
            default:
                ViewHolder2 vh3 = (ViewHolder2) viewHolder;
                configureViewHolder2(vh3);
                break;
        }
    }
//    private void configureDefaultViewHolder(RecyclerViewSimpleTextViewHolder vh, int position) {
//        vh.getLabel().setText((CharSequence) items.get(position));
//    }
    private void configureViewHolder1(ViewHolder1 vh1, int position) {
        User user = (User) items.get(position);
        if (user != null) {
            vh1.getLabel1().setText(user.getMFName());
            vh1.getLabel2().setText( user.getMName());
            //vh1.postImage.setImageResource(R.drawable.universe);
            Picasso.with(vh1.postImage.getContext())
                    .load(R.drawable.universe)
                    .resize(400,200) // resizes the image to these dimensions (in pixel)
                    .centerCrop()
                    .placeholder(R.drawable.progress_animation)
                    .error(R.drawable.error_image)
                    .into(vh1.postImage);
        }
    }
    private void configureViewHolder2(ViewHolder2 vh2) {
       // vh2.getImageView().setImageResource(R.drawable.sample_golden_gate);
        Picasso.with(vh2.getImageView().getContext())
                .load(R.drawable.sample_golden_gate)
                .resize(400,200) // resizes the image to these dimensions (in pixel)
                .centerCrop()
                .placeholder(R.drawable.progress_animation)
                .error(R.drawable.error_image)
                .into(vh2.getImageView());
    }
}

使用全部的片段

public class OneFragment extends Fragment  {
    private static final int VERTICAL_ITEM_SPACE = 48;
    Button button;
    RecyclerView rvMixed;
    public OneFragment() {
        // Required empty public constructor
    }
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView = inflater.inflate(R.layout.fragment_one, container, false);
        // Lookup the recyclerview in activity layout
        rvMixed = (RecyclerView) rootView.findViewById(R.id.rvContacts);
        rvMixed.setAdapter(new ComplexRecyclerViewAdapter(getSampleArrayList()));
        LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
// Control orientation of the items
// also supports LinearLayoutManager.HORIZONTAL
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
// Optionally customize the position you want to default scroll to
        layoutManager.scrollToPosition(0);
// Attach layout manager to the RecyclerView
        rvMixed.setLayoutManager(layoutManager);
        //adding spacing between recycler view items
       // rvMixed.addItemDecoration(new VerticalSpaceItemDecoration(VERTICAL_ITEM_SPACE));


        // That's all!
        return rootView;
    }
    private void bindDataToAdapter() {
        // Bind adapter to recycler view object
        rvMixed = (RecyclerView) getView().findViewById(R.id.rvContacts);
        ComplexRecyclerViewAdapter mAdapter = new ComplexRecyclerViewAdapter(getSampleArrayList());
        rvMixed.setAdapter(mAdapter);
    }
    private ArrayList<Object> getSampleArrayList() {
        ArrayList<Object> items = new ArrayList<>();
        items.add(new User("Dany Targaryen", "Valyria"));
        items.add(new User("Rob Stark", "Winterfell"));
        items.add("image");
        items.add(new User("Jon Snow", "Castle Black"));
        items.add("image");
        items.add(new User("Tyrion Lanister", "King's Landing"));
        return items;
    }
}

Answer 1

您只需在

初始化时通过其构造函数传递 ComplexRecyclerViewAdapter 上的单击侦听器即可。然后，您可以为每个 ViewHolder 重复使用相同的点击侦听器引用。