你可以做一个接口回调来知道哪个项目被点击，例如这是你的接口

interface OnClickListener {
    void onClick(int position)
}

并将此接口传递给我们的适配器，在getview方法中，每当单击视图时，都可以调用接口的onclick方法
这是示例代码

interface OnClickListener {
    void onClick(int position);
}

public class GridViewAdapter extends BaseAdapter {

    private List<String> list;
    private OnClickListener listener;

    private Context context;

    public GridViewAdapter(Context context,List<String> list,OnClickListener listener){
        this.listener = listener;
        this.context = context;
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

       View  view = LayoutInflater.from(context).inflate(ur layout);

       view.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
               listener.onClick(position);
           }
       });

        return view;
    }
}

要启动适配器，你可以使用这个代码，

GridViewAdapter adapter = new GridViewAdapter(context, imageList, new OnClickListener() {
            @Override
            public void onClick(int position) {
                // this method called every time an view get clicked
                // and u can change the DataSet which now is imageList
               // imageList.set(position,"something new ");
                // after the change of DataSet u should cal the notifyDataSetChanged
                adapter.notifyDataSetChanged();
            }
        });