Question

我有一个下载文件的类，目的是将其存储在用户的Downloads文件夹中。我声明了正确的权限。我可以看到该文件正在根据此类发送回调用活动的广播进行下载。但是，完成此操作后，文件似乎未保存在任何位置，当然不在Downloads文件夹中。

任何人都可以看到为什么我无法访问此文件夹和/或为什么它无法正确保存？谢谢。

public class FileDownloader extends IntentService {

    public static final String FILENAME = "filename";
    public static final String FULLPATH = "fullpath";
    public static final String FILESIZE = "filesize";
    public static final String RECEIVER = "receiver";

    public static String broadcastReceiver;

    public FileDownloader() {
        super("DownloadFile");
    }

    protected void onHandleIntent(Intent intent) {

        String urlPath = intent.getStringExtra(FULLPATH);
        String filename = intent.getStringExtra(FILENAME);
        int filesize = intent.getIntExtra(FILESIZE, 1);
        broadcastReceiver = intent.getStringExtra(RECEIVER);

        // THIS IS WHERE I AM ATTEMPTING TO CREATE A PATH TO THE DOWNLOADS FOLDER
        File outputFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), filename);

        if (outputFile.exists()) {
            outputFile.delete();
        }

        downloadFile(urlPath, outputFile, filesize);
    }

    private void downloadFile(String urlPath, File outputFile, int filesize) {

        Intent intent = new Intent(broadcastReceiver);
        URL url;
        try {
            url = new URL(urlPath);
            InputStream is = url.openStream();
            OutputStream os = new FileOutputStream(outputFile);

            byte[] b = new byte[2048];
            int length;
            int bytes_downloaded = 0;

            while ((length = is.read(b)) != -1) {
                os.write(b, 0, length);
                bytes_downloaded += length;

                final int progress = (int) ((bytes_downloaded * 100l) / filesize);
                String message = Integer.toString(progress) + "%";
                intent.putExtra("message", message);
                LocalBroadcastManager.getInstance(TexasApp.getContext()).sendBroadcast(intent);
            }

            intent.putExtra("message", "done");
            LocalBroadcastManager.getInstance(TexasApp.getContext()).sendBroadcast(intent);

            is.close();
            os.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

以防万一，这是我的清单：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

最后一件事：我知道我正在正确浏览Android 6权限，因此请假设这与此问题无关。

谢谢！

Answer 1

要使您的文件显示在文件管理器中（例如，在您的开发计算机上），您需要安排将其编入MediaStore的索引。这最终会发生，但可能需要几个小时。要更快地对其编制索引，请使用MediaScannerConnection及其scanFile()方法。

将文件下载到“下载”文件夹不会保存

1 个答案: