[ Android ] : Download a file & showing the progress

There are several ways to achieve this goal,

One simplest way I tried & succeed below is to use DownloadManager class (GingerBread and newer only):

1. check if download manager is available:

    /**

     * @param context used to check the device version and DownloadManager                     information

     * @return true if the download manager is available

     */

    public static boolean isDownloadManagerAvailable(Context context) {

        try {

            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD) {

                return false;

            }

            Intent intent = new Intent(Intent.ACTION_MAIN);

            intent.addCategory(Intent.CATEGORY_LAUNCHER);

            intent.setClassName("com.android.providers.downloads.ui",                                "com.android.providers.downloads.ui.DownloadList");

            List<ResolveInfo> list =                                                             context.getPackageManager().queryIntentActivities(intent,

                PackageManager.MATCH_DEFAULT_ONLY);

            return list.size() > 0;

        } catch (Exception e) {

            return false;

        }

    }

2. if step 1 checked OK, download from some URL:

String url = "some url path";

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

request.setDescription("to /sdcard/download");

request.setTitle("some string");

// in order for this if to run, you must use the android 3.2 to compile your app

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {

    request.allowScanningByMediaScanner();

    request.setNotificationVisibility(DownloadManager.Request.

                          VISIBILITY_VISIBLE_NOTIFY_COMPLETED);

}

request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "some string");

// get download service and enqueue file

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

manager.enqueue(request);