android - 我在使用水平和垂直滚动实现 RecyclerView 时遇到一个问题

Question

我想实现具有水平和垂直滚动以及垂直项目上的一个按钮的 RecyclerView，因此当我单击按钮时，文本应更改为保存到已保存。在我的应用程序中，当我单击按钮时，文本发生了变化，但是当我自动向下滚动时，另一个按钮的文本发生了变化。下面是我的代码。

In this screenshot I clicked on VerticalList3's button and text is changed successfully

When I scrolled down automatically VerticalList20 and VerticalList14's button text is changed

 public class MainActivity extends AppCompatActivity {
private RecyclerView vertical_recycler_view,horizontal_recycler_view;
private ArrayList<String> horizontalList,verticalList;
private HorizontalAdapter horizontalAdapter;
private  VerticalAdapter verticalAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    vertical_recycler_view= (RecyclerView) findViewById(R.id.vertical_recycler_view);
    horizontal_recycler_view= (RecyclerView) findViewById(R.id.horizontal_recycler_view);



    horizontalList=new ArrayList<>();
    horizontalList.add("horizontal 1");
    horizontalList.add("horizontal 2");
    horizontalList.add("horizontal 3");
    horizontalList.add("horizontal 4");
    horizontalList.add("horizontal 5");
    horizontalList.add("horizontal 6");
    horizontalList.add("horizontal 7");
    horizontalList.add("horizontal 8");
    horizontalList.add("horizontal 9");
    horizontalList.add("horizontal 10");
    horizontalList.add("horizontal 11");
    horizontalList.add("horizontal 12");
    horizontalList.add("horizontal 13");
    horizontalList.add("horizontal 14");
    horizontalList.add("horizontal 15");
    horizontalList.add("horizontal 16");
    horizontalList.add("horizontal 17");
    horizontalList.add("horizontal 18");
    horizontalList.add("horizontal 19");
    horizontalList.add("horizontal 20");


    verticalList=new ArrayList<>();
    verticalList.add("verticallist 1");
    verticalList.add("verticallist 2");
    verticalList.add("verticallist 3");
    verticalList.add("verticallist 4");
    verticalList.add("verticallist 5");
    verticalList.add("verticallist 6");
    verticalList.add("verticallist 7");
    verticalList.add("verticallist 8");
    verticalList.add("verticallist 9");
    verticalList.add("verticallist 10");
    verticalList.add("verticallist 11");
    verticalList.add("verticallist 12");
    verticalList.add("verticallist 13");
    verticalList.add("verticallist 14");
    verticalList.add("verticallist 15");
    verticalList.add("verticallist 16");
    verticalList.add("verticallist 17");
    verticalList.add("verticallist 18");
    verticalList.add("verticallist 19");
    verticalList.add("verticallist 20");

    horizontalAdapter=new HorizontalAdapter(horizontalList);
          verticalAdapter=new VerticalAdapter(verticalList);


    LinearLayoutManager verticalLayoutmanager
            = new LinearLayoutManager(MainActivity.this, 
LinearLayoutManager.VERTICAL, false);
    vertical_recycler_view.setLayoutManager(verticalLayoutmanager);
//        RecyclerView.LayoutManager mLayoutManager = new 
LinearLayoutManager(getApplicationContext());
//        vertical_recycler_view.setLayoutManager(mLayoutManager);
    LinearLayoutManager horizontalLayoutManagaer
            = new LinearLayoutManager(MainActivity.this, LinearLayoutManager.HORIZONTAL, false);
    horizontal_recycler_view.setLayoutManager(horizontalLayoutManagaer);

    vertical_recycler_view.setAdapter(verticalAdapter);
    horizontal_recycler_view.setAdapter(horizontalAdapter);
}



public class HorizontalAdapter extends 
RecyclerView.Adapter<HorizontalAdapter.MyViewHolder> {

    private List<String> horizontalList;

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView txtView;

        public MyViewHolder(View view) {
            super(view);
            txtView = (TextView) view.findViewById(R.id.txtView);
        }
    }


    public HorizontalAdapter(List<String> horizontalList) {
        this.horizontalList = horizontalList;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.horizontal_item_view, parent, false);

        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {

        holder.txtView.setText(horizontalList.get(position));
        holder.txtView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,holder.txtView.getText().toString(),Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public int getItemCount() {
        return horizontalList.size();
    }
}



public class VerticalAdapter extends RecyclerView.Adapter<VerticalAdapter.MyViewHolder> {

    private List<String> verticalList;

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView txtView;
        public Button button;
        public MyViewHolder(View view) {
            super(view);
            txtView = (TextView) view.findViewById(R.id.txtView);
            button = (Button) view.findViewById(R.id.verticalButton);
        }
    }


    public VerticalAdapter(List<String> verticalList) {
        this.verticalList = verticalList;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.vertical_item_view, parent, false);

        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        holder.button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                holder.button.setText("Saved");
            }
        });
        holder.txtView.setText(verticalList.get(position));
        holder.txtView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(MainActivity.this,holder.txtView.getText().toString(),Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public int getItemCount() {
        return verticalList.size();
    }
  }
}

Answer 1

@Potapov Anton 是对的，但您也可以这样做。

实现这个方法:

@Override
public int getItemViewType(int position) {
    return position;
}

希望对你有帮助