Java(安卓) IOException : Authority expected at index 7: http://

Question

我试图让这个函数从互联网上下载文件。我向它传递了两个参数:从 - url 到网络上的文件，到 - 本地文件路径；打开流时抛出IOException的问题:

Authority expected at index 7: http://

这是我的代码:

private boolean downloadFile(String pathFrom, String pathTo)
{
    URL url;
    ReadableByteChannel rbc;
    FileOutputStream fos;

    try {
        url = new URL(pathFrom);
        rbc = Channels.newChannel(url.openStream());
        fos = new FileOutputStream(pathTo);
        fos.getChannel().transferFrom(rbc, 0, 1 << 24);
        return true;
    } catch (MalformedURLException e) {
        Log.e(TAG, "Failed to download file (" + pathFrom + ") because of malformed URL.");
    } catch (FileNotFoundException e) {
        Log.e(TAG, "Failed to download file (" + pathFrom + ") because FileNotFoundException occured when opening output stream: " + e.getMessage());
    } catch (IOException e) {
        Log.e(TAG, "Failed to download file (" + pathFrom + ") because IOException occured when transfering file or opening input stream: " + e.getMessage());
    }

    return false;
}

如您所见，它还打印了文件的 url，这很好。您可以将其粘贴到浏览器中，它会打开文件。

有人知道是什么原因造成的和/或如何解决它吗？

附言我同时拥有使用权限 - INTERNET 和WRITE_EXTERNAL_STORAGE

Answer 1

尝试使用 URLEncoder 对您的网址进行编码, 在 UTF-8格式。

示例代码:

String encodedUrl = URLEncoder.encode(url.toString(), "UTF-8");