要实现在Android Studio中添加列标题和不同列宽度的需求，可以使用RecyclerView控件和GridLayoutManager进行布局。使用GridLayoutManager，您可以设置每个单元格的大小和位置，从而实现不同的列宽度。

以下是示例代码：

1.在XML布局文件中添加RecyclerView控件：

2.在Java代码中设置LayoutManager和数据适配器：

//定义列数 int numberOfColumns = 3;

//设置LayoutManager GridLayoutManager gridLayoutManager = new GridLayoutManager(this, numberOfColumns); recyclerView.setLayoutManager(gridLayoutManager);

//定义数据列表 ArrayList dataList = new ArrayList();

//添加数据

...

//设置适配器 MyAdapter myAdapter = new MyAdapter(dataList); recyclerView.setAdapter(myAdapter);

3.定义数据适配器：

public class MyAdapter extends RecyclerView.Adapter {

private ArrayList dataList;

public static class ViewHolder extends RecyclerView.ViewHolder {
    public TextView column1;
    public TextView column2;
    public TextView column3;

    public ViewHolder(View itemView) {
        super(itemView);
        column1 = (TextView) itemView.findViewById(R.id.column1);
        column2 = (TextView) itemView.findViewById(R.id.column2);
        column3 = (TextView) itemView.findViewById(R.id.column3);
    }
}

public MyAdapter(ArrayList dataList) {
    this.dataList = dataList;
}

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

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    MyData currentItem = dataList.get(position);

    holder.column1.setText(currentItem.getColumn1());
    holder.column2.setText(currentItem.getColumn2());
    holder.column3.setText(currentItem.getColumn3());
}

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

}

4.定义单元格布局文件my_row_layout.xml：