下面是一个示例代码，演示如何在Android中使用RecyclerView和GridLayoutManager来实现在几行上并排显示动态列表的方框：

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private BoxAdapter boxAdapter;
    private List boxList;

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

        recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new GridLayoutManager(this, 2));

        // 初始化方框数据
        boxList = new ArrayList<>();
        boxList.add(new Box("方框1", R.drawable.box1));
        boxList.add(new Box("方框2", R.drawable.box2));
        boxList.add(new Box("方框3", R.drawable.box3));
        boxList.add(new Box("方框4", R.drawable.box4));
        boxList.add(new Box("方框5", R.drawable.box5));
        boxList.add(new Box("方框6", R.drawable.box6));

        // 创建适配器并将数据传递给它
        boxAdapter = new BoxAdapter(boxList);
        recyclerView.setAdapter(boxAdapter);
    }

    private static class Box {
        private String name;
        private int imageRes;

        public Box(String name, int imageRes) {
            this.name = name;
            this.imageRes = imageRes;
        }

        public String getName() {
            return name;
        }

        public int getImageRes() {
            return imageRes;
        }
    }

    private class BoxAdapter extends RecyclerView.Adapter {

        private List boxList;

        public BoxAdapter(List boxList) {
            this.boxList = boxList;
        }

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

        @Override
        public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
            Box box = boxList.get(position);
            holder.nameTextView.setText(box.getName());
            holder.imageView.setImageResource(box.getImageRes());
        }

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

        public class ViewHolder extends RecyclerView.ViewHolder {
            public ImageView imageView;
            public TextView nameTextView;

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

请注意，上述代码假设您已经在布局文件中添加了一个RecyclerView（使用id为recyclerView）和一个名为item_box.xml的布局文件，用于表示每个方框的项。

item_box.xml的示例内容如下：

在上述示例中，我们使用了RecyclerView、GridLayoutManager、自定义适配器和ViewHolder来实现在几行上并排显示动态列表的方框。