Android -根据RecyclerView中点击的位置更新文本视图

// 布局文件中定义RecyclerView和文本视图
<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

// 创建数据集合
List<String> dataList = new ArrayList<>();
dataList.add("Item 1");
dataList.add("Item 2");
dataList.add("Item 3");

// 创建适配器
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> mDataList;

    public MyAdapter(List<String> dataList) {
        mDataList = dataList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        String data = mDataList.get(position);
        holder.textView.setText(data);
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}

// 在Activity或Fragment中设置RecyclerView和适配器
RecyclerView recyclerView = findViewById(R.id.recyclerView);
TextView textView = findViewById(R.id.textView);

MyAdapter adapter = new MyAdapter(dataList);
recyclerView.setAdapter(adapter);

// RecyclerView的点击事件监听器
recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
    @Override
    public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
        if (e.getAction() == MotionEvent.ACTION_UP) {
            View childView = rv.findChildViewUnder(e.getX(), e.getY());
            int position = rv.getChildAdapterPosition(childView);
            if (position != RecyclerView.NO_POSITION) {
                String clickedItem = dataList.get(position);
                textView.setText(clickedItem);
            }
        }
        return false;
    }

    @Override
    public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
    }
});