Question

HY。我正在开发一个Android应用程序，我从服务器下载视频。我同时下载多个视频并将其保存在SD卡中没有任何问题。我正在使用DownloadManager类进行下载。我可以在状态栏中看到下载图标并在通知区域中下载进度，它由DownloadManger本身管理。我有一个单独的选项卡名称下载，我使用listview显示以前下载的视频，但现在我还必须显示当前正在下载的带有进度条的视频。我的问题是 1 - 如何将当前正在下载的视频显示在列表视图中 2 - 如何维护所有视频的进度条。

这是我目前的代码

String urlDownload = "https://dl.dropbox.com/s/ex4clsfmiu142dy/test.zip?token_hash=AAGD-XcBL8C3flflkmxjbzdr7_2W_i6CZ_3rM5zQpUCYaw&dl=1";
    DownloadManager.Request request = new DownloadManager.Request(Uri.parse(urlDownload));

    request.setDescription("Testando");
    request.setTitle("Download");
    request.allowScanningByMediaScanner();
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "teste.zip");

    final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);

    final long downloadId = manager.enqueue(request);

    final ProgressBar mProgressBar = (ProgressBar) findViewById(R.id.progressBar1);

    new Thread(new Runnable() {

        @Override
        public void run() {

            boolean downloading = true;

            while (downloading) {

                DownloadManager.Query q = new DownloadManager.Query();
                q.setFilterById(downloadId);

                Cursor cursor = manager.query(q);
                cursor.moveToFirst();
                int bytes_downloaded = cursor.getInt(cursor
                        .getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
                int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));

                if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)) == DownloadManager.STATUS_SUCCESSFUL) {
                    downloading = false;
                }

               final int dl_progress = (int) ((double)bytes_downloaded / (double)bytes_total * 100f);

                runOnUiThread(new Runnable() {

                    @Override
                    public void run() {

                        mProgressBar.setProgress((int) dl_progress);

                    }
                });

                Log.d(Constants.MAIN_VIEW_ACTIVITY, statusMessage(cursor));
                cursor.close();
            }

        }
    }).start();

附上图片以显示我想要实现的目标。任何帮助都会被贬低。谢谢

Answer 1

如果您想要显示卡片或存储空间中的所有视频，可以参考野兔 android scanning all .mp3 files in SD Card 对于当前视频，您必须将当前视频存储在任何任何sql或共享首选项文件中，您可以在完成从卫星或共享首选项中删除后从中获取名称

使用进度条下载多个视频

1 个答案: