下载同名图片

Question

我在下面有一个代码。

final URL url1 = stringToURL("linki_of_image/image1.jpg");
final URL url2 = stringToURL("linki_of_image/image2.jpg");
final URL url3 = stringToURL("linki_of_image/image3.jpg");
final URL url4 = stringToURL("linki_of_image/image4.jpg");
final URL url5 = stringToURL("linki_of_image/image5.jpg");

mMyTask = new DownloadTask().execute(url1, url2, url3, url4,url5);

private class DownloadTask extends AsyncTask<URL, Integer, List<Bitmap>> {
    protected void onPreExecute() {
        mProgressDialog.show();
        mProgressDialog.setProgress(0);
    }

    protected List<Bitmap> doInBackground(URL... urls) {
        int count = urls.length;
        HttpURLConnection connection = null;
        List<Bitmap> bitmaps = new ArrayList<>();

        for (int i = 0; i < count; i++) {
            URL currentURL = urls[i];

            try {
                connection = (HttpURLConnection) currentURL.openConnection();
                connection.connect();

                InputStream inputStream = connection.getInputStream();
                BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);

                Bitmap bmp = BitmapFactory.decodeStream(bufferedInputStream);
                bitmaps.add(bmp);

                publishProgress((int) (((i + 1) / (float) count) * 100));
                if (isCancelled()) {
                    break;
                }

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                connection.disconnect();
            }

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        return bitmaps;
    }

    protected void onProgressUpdate(Integer... progress) {
        mProgressDialog.setProgress(progress[0]);
    }

    protected void onCancelled() {
        Toast.makeText(mContext, "Task cancelled", Toast.LENGTH_SHORT).show();
    }

    protected void onPostExecute(List<Bitmap> result) {
        mProgressDialog.dismiss();

        mLLayout.removeAllViews();

        for (int i = 0; i < result.size(); i++) {
            Bitmap bitmap = result.get(i);
            Uri imageInternalUri = saveImageToInternalStorage(bitmap, i);
            addNewImageViewToLayout(bitmap);
            addNewImageViewToLayout(imageInternalUri);
        }
    }
}


protected URL stringToURL(String urlString) {
    try {
        URL url = new URL(urlString);
        return url;
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    return null;
}

protected Uri saveImageToInternalStorage(Bitmap bitmap, int index) {
    File file = sdCardDirectory;
    file = new File(file, "UniqueFileName" + index + ".jpg");

    try {
        OutputStream stream = null;
        stream = new FileOutputStream(file);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
        stream.flush();
        stream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    Uri savedImageURI = Uri.parse(file.getAbsolutePath());
    return savedImageURI;
}

protected void addNewImageViewToLayout(Bitmap bitmap) {
    ImageView iv = new ImageView(getApplicationContext());
    iv.setImageBitmap(bitmap);
    LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, 500);
    iv.setLayoutParams(lp);
    mLLayout.addView(iv);
}

protected void addNewImageViewToLayout(Uri uri) {
    ImageView iv = new ImageView(getApplicationContext());
    iv.setImageURI(uri);
    LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, 300);
    iv.setLayoutParams(lp);
    mLLayout.addView(iv);
}

上面的代码从服务器下载图像，它完美地工作我这里唯一的问题是当它下载图像时代码重命名它。

我的问题是如何下载或创建仍然具有相同文件名的图像（因为我注意到正在创建图像）

因为saveImageToInternalStorage 部分将其重命名为新文件

Answer 1

基本上服务器也会给你文件的名称，你只需要从标题中获取它并将其应用于保存它而不是使用你唯一的名称逻辑

https://stackoverflow.com/a/10995501/4804264

这个答案会对你有所帮助

Answer 2

String baseName = FilenameUtils.getBaseName("linki_of_image/image1.jpg");

baseName = image1

String baseNameWithExtension = FilenameUtils.getName("linki_of_image/image1.jpg");

baseNameWithExtension = image1.jpg

回答你的问题；

我的问题是如何在不重命名的情况下下载这些图像？ 或在链接上使用相同的新名称。

File file = sdCardDirectory;
file = new File(file, baseNameWithExtension);