android - WebView & 下载管理器

Question

我正在制作一个应用程序，其工作是加载一个特定的网站。除了下载文件外，一切正常。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    adviser = (WebView) findViewById(R.id.webView);
    getActionBar().hide();
    adviser.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);

            adviser.setDownloadListener(new DownloadListener() {
                public void onDownloadStart(String url, String userAgent,
                        String contentDisposition, String mimetype,
                        long contentLength) {

                    Request request = new Request(Uri.parse(url));

                    request.allowScanningByMediaScanner();
                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                    request.setDestinationInExternalPublicDir(
                            Environment.DIRECTORY_DOWNLOADS,
                            customizeurl(contentDisposition));
                    DownloadManager dm = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
                    dm.enqueue(request);

                    Toast.makeText(getApplicationContext(), "downloading",
                            Toast.LENGTH_LONG).show();
                }
            });
            return true;
        }
    });

    adviser.getSettings().setJavaScriptEnabled(true);
    adviser.getSettings().setSupportZoom(true);
    adviser.getSettings().setAllowFileAccess(true);
    adviser.getSettings().setAllowUniversalAccessFromFileURLs(true);

    adviser.getSettings().setUseWideViewPort(true);
    adviser.getSettings().setLoadWithOverviewMode(true);
    adviser.setVerticalScrollBarEnabled(true);
    adviser.setHorizontalScrollBarEnabled(false);
    adviser.getSettings().setAppCacheEnabled(true);
    adviser.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    adviser.getSettings().setSupportMultipleWindows(true);

    adviser.getSettings().setUserAgentString("Mozilla");
    adviser.loadUrl("http://localhost/www/site/login");
}

url: localhost/www/site/download?action=newaction&dl=folder\subfolder\subsubfolder\1449822583856.jpg

uri: localhost/www/site/download?action=newaction&dl=folder\subfolder\subsubfolder\1449822583856.jpg

userAgent: Mozilla//无论我用什么作为代理都行不通

contentDisposition: attachment;filename=1449822583856.jpg

模仿类型:图像/jpeg

内容长度:-1

它将我的主页下载为 php 文件，而不是我的 jpg。有任何想法吗？感谢您的帮助:)

编辑:Content-Length 可能有问题？或者可能是一些 session 问题？

Answer 1

很明显会下载一个php文件，因为你提供的url没有包含文件的直接地址

URL = localhost/www/site/download?action=newaction&dl=folder\subfolder\subsubfolder\1449822583856.jpg

因此在浏览器中输入它会显示图像，但地址不属于任何文件下载