java - 无法解析符号 'ByteArrayBuffer'

Question

因此，在我的应用程序中有一个 WebView，其中包含我想在单击按钮时保存的图像。为此，我使用了这段代码:

import org.apache.http.util.ByteArrayBuffer;

 public void DownloadFromUrl(String fileName) {  //this is the downloader method
    try {
            URL url = new URL(wv2.getUrl()); //you can write here any link
            File file = new File(fileName);
            Canvas canvas = new Canvas();
            wv2.draw(canvas );

            long startTime = System.currentTimeMillis();
            Log.d("ImageManager", "download begining");
            Log.d("ImageManager", "download url:" + url);
            Log.d("ImageManager", "downloaded file name:" + fileName);
            URLConnection ucon = url.openConnection();

            InputStream is = ucon.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);

            ByteArrayBuffer baf = new ByteArrayBuffer(50);
            int current = 0;
            while ((current = bis.read()) != -1) {
                    baf.append((byte) current);
            }

            FileOutputStream fos = new FileOutputStream(file);
            fos.write(baf.toByteArray());
            fos.close();
            Log.d("ImageManager", "download ready in"
                            + ((System.currentTimeMillis() - startTime) / 1000)
                            + " sec");

    } catch (IOException e) {
            Log.d("ImageManager", "Error: " + e);
    }

其中 wv2 是 WebView。奇怪的是，我不能再这样做了，并且在我的导入语句中出现错误 Cannot resolve symbol 'ByteArrayBuffer'

Answer 1

org.apache.http 在最新的 SDK 中被删除，这就是导入失败的原因。

请注意，您在此代码中不需要 ByteArrayBuffer，您可以改用 ByteBuffer，或者从 bis 写入 fos，如下所示:

            InputStream is = ucon.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            FileOutputStream fos = new FileOutputStream(file);

            int current = 0;
            while ((current = bis.read()) != -1) {
                    fos.write(current);
            }

            fos.close();