java - 访问 Storage.DIRECTORY_DOWNLOADS（根目录/下载文件夹以查看文件）

Question

此方法无法读取下载的文件

File localFile = new File(Storage.DIRECTORY_DOWNLOADS + downloadableFileName);

这也工作

File localFile = new File(getContext().getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS) + downloadableFileName);

文件下载到根目录/下载文件夹而不是应用程序特定文件夹

任何人都可以帮助

下载方法是

    protected Void doInBackground(String... strings) {
        String fileUrl = strings[0];   // -> http://maven.apache.org/maven-1.x/maven.pdf
        String filename = strings[1];
        String extStorageDirectory = Storage.DIRECTORY_DOWNLOADS;

        File folder = new File(extStorageDirectory);
        folder.mkdir();
        initClipboardDownloadListener(filename);
        Downloader request = Downloader.getInstance(getActivity())
                .setListener(downloadListener)
                .setUrl(fileUrl)
                .setToken(fileUrl)
                .setAllowedOverRoaming(true)
                .setVisibleInDownloadsUi(true)
                .setDescription("Downloading....")
                .setKeptAllDownload(true)
                .setScanningByMediaScanner(false)
                .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
                .setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
                .setDestinationDir(extStorageDirectory, filename)
                .setNotificationTitle(filename);
        request.setAllowedOverMetered(true);
        request.start();
        return null;
    }

Answer 1

尝试这个：

...
String path = Environment.getExternalStorageDirectory().toString() +"/Download/" + fileName;
File file = new File(path);
...