在自己的BaseAdapter里面开启异步任务获取Bitmap，如何setImageBitmap()

public class FoodAdapter extends BaseAdapter {

    private Context mContext;
    private List<Food> mData;

    public FoodAdapter(Context context, List<Food> data) {
        mContext = context;
        mData = data;
    }

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

    @Override
    public Food getItem(int position) {
        return mData.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;

        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.fragment_index_goodlist_item,parent,false);
            viewHolder = new ViewHolder(convertView);
            viewHolder.findViews();
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        Food food = mData.get(position);
        
        //获取Bitmap并加载ImageView
        MyAsynTask.BitmapAsyncTask bitmapAsyncTask = new MyAsynTask.BitmapAsyncTask(food.getImg());
        bitmapAsyncTask.execute();
        bitmapAsyncTask.setOnDataFinishedListener(new MyAsynTask.OnDataFinishedListener() {
            @Override
            public void onDataSuccess(Object result) {
//                (Bitmap) result;
                FoodAdapter.super.notifyDataSetChanged();
            }

            @Override
            public void onDataFailure() {
                Toast.makeText(mContext, "加载图片失败",Toast.LENGTH_SHORT).show();
            }
        });

        //加载其他控件
        viewHolder.mTvName.setText(food.getName());
        viewHolder.mTvDescription.setText(food.getDescription());
        viewHolder.mTvPrice.setText("￥"+food.getPrice());
        viewHolder.mTvAction.setText(food.getAction());
        viewHolder.mTvCount.setText("已售："+food.getCount());

        return convertView;
    }

    private class ViewHolder {
        ImageView mIvImg;
        TextView mTvName, mTvDescription, mTvPrice, mTvAction, mTvCount;
        View mView;
        public ViewHolder (View view){
            this.mView = view;
        }

        private void findViews() {
            mIvImg = mView.findViewById(R.id.id_iv_img);
            mTvName = mView.findViewById(R.id.id_tv_name);
            mTvDescription = mView.findViewById(R.id.id_tv_description);
            mTvPrice = mView.findViewById(R.id.id_tv_price);
            mTvAction = mView.findViewById(R.id.id_tv_action);
            mTvCount = mView.findViewById(R.id.id_tv_count);
        }
    }
}

在上面内部方法onDataSuccess(Object result)中，如何调用viewHolder去设置已经获得的(Bitmap)result呢？或许只能用Handler来处理？

public class MyAsynTask {
    //获取JSON中的照片
    public static class BitmapAsyncTask extends AsyncTask<String, Void, Bitmap> {
        private String mUrl;
        private OnDataFinishedListener onDataFinishedListener;

        public BitmapAsyncTask(String url) {
            this.mUrl = url;
        }

        public void setOnDataFinishedListener(OnDataFinishedListener onDataFinishedListener) {
            this.onDataFinishedListener = onDataFinishedListener;
        }

        @Override
        protected Bitmap doInBackground(String... strings) {
            InputStream in = null;
            try {
                URL url = new URL(strings[0]);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.setRequestMethod("GET");
                connection.setConnectTimeout(5000);

                if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                    in = connection.getInputStream();
                    Bitmap bitmap = BitmapFactory.decodeStream(in);
                    in.close();
                    return bitmap;
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (in != null)
                        in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(Bitmap bitmap) {
            super.onPostExecute(bitmap);
            if (bitmap != null) {
                onDataFinishedListener.onDataSuccess(bitmap);
            } else {
                onDataFinishedListener.onDataFailure();
            }
        }
    }

    public interface OnDataFinishedListener {
        public void onDataSuccess(Object result);

        public void onDataFailure();
    }
}