如何使用Picasso Executor从后台的URL列表中下载一堆图像

Question

如何实现Picasso Executor从后台的Url列表中下载图像。我要实现的代码如下

Picasso.setSingletonInstance(new Picasso.Builder(this).defaultBitmapConfig(Bitmap.Config.RGB_565).executor(threadpool)))

我实现了以下代码，以便从单个网址下载图像。

 public void downloadImage(String url, String id,ImageDownloadedCallBack imageDownloadedCallBack){
        mImagename=id+JPEG;
        if(mIimageDownloadedCallBack != null) {
            Picasso.get().load(url).into(mTarget);
        } else {
            mIimageDownloadedCallBack=imageDownloadedCallBack;
            Picasso.get().load(url).into(mTarget);
        }
    }

public final Target mTarget = new Target() {
        @Override
        public void onBitmapLoaded(final Bitmap bitmap, Picasso.LoadedFrom from) {
            fileStorage.putFile(mImagename,bitmap);
                if (mIimageDownloadedCallBack != null) {
                    mIimageDownloadedCallBack.imageDownloadComplete(bitmap, true);
                }
        }

        @Override
        public void onBitmapFailed(Exception e, Drawable errorDrawable) {
            if(mIimageDownloadedCallBack != null) {
                mIimageDownloadedCallBack.imageDownloadComplete(null,false);
            }
            Log.d(TAG,e.getMessage());
        }

        @Override
        public void onPrepareLoad(Drawable placeHolderDrawable) {
            if (placeHolderDrawable != null) {Log.d(TAG,"PlaceHolderDrawable");}
        }
    };

这是我需要传递给毕加索的url的列表

public void getDepartmentList() {
        AppExecutors appExecutors = new AppExecutors();
        appExecutors.diskIO().execute(() -> {
            Departments departments = PersistentItemsUtil.getsDepartments();
            List<MdcItemSummary> mdcItems = ProductLocatorApplication.getDatabase().mdcItemSummaryDao().getMDCItems(departments.getDept().getName());
            Log.d("MDC", mdcItems.toString());
        });
    }

任何帮助将不胜感激...