Android Download File With DownloadManager and Check Status (Java)

April 15, 2019

Request a download

Specify a url
Optional: Specify a name (the name is shown in Android Notification, if you enable it)
You can specifiy to perform download on Wifi or Mobile or both
Specify the download location and file name
Save the Download ID to check on status later

String url = ...
String name = ...
String downloadFileName = ...

DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

Uri downloadUri = Uri.parse(item.downloadUrl);
DownloadManager.Request request = new DownloadManager.Request(downloadUri);
request.setTitle(name);
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
request.setDestinationInExternalFilesDir(context, Environment.DIRECTORY_DOWNLOADS, downloadFileName);

long downloadId = downloadManager.enqueue(request);

Check download status by Download ID

long downloadId = ...

Cursor cursor = downloadManager.query(new DownloadManager.Query().setFilterById(downloadId));

if (cursor != null && cursor.moveToNext()) {
    int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
    cursor.close();

    if (status == DownloadManager.STATUS_FAILED) {
        // do something when failed
    }
    else if (status == DownloadManager.STATUS_PENDING || status == DownloadManager.STATUS_PAUSED) {
        // do something pending or paused
    }
    else if (status == DownloadManager.STATUS_SUCCESSFUL) {
        // do something when successful
    }
    else if (status == DownloadManager.STATUS_RUNNING) {
        // do something when running
    }
}

Download might not start immediately (pending), so you can run a timer to check for status to make sure it is running.

final Timer timer = new Timer();
timer.schedule(new TimerTask() {
    @Override
    public void run() {
        int status = ... // check status

        if (status == DownloadManager.STATUS_RUNNING || status == DownloadManager.STATUS_SUCCESSFUL) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    // update UI
                }
            });
            timer.cancel();
        }
    }
}, 1000);

Get a callback/notification when download is successful or cancelled.

IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
DownloadReceiver downloadReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        long downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);

        if (downloadId == -1)
            return;

        // query download status
        Cursor cursor = downloadManager.query(new DownloadManager.Query().setFilterById(downloadId));
        if (cursor.moveToFirst()) {
            int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
            if(status == DownloadManager.STATUS_SUCCESSFUL){

                // download is successful
                String uri = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
                File file = new File(Uri.parse(uri).getPath());
            }
            else {
                // download is cancelled
            }
        }
        else {
            // download is cancelled
        }
    }
};

registerReceiver(downloadReceiver, filter);

NOTE: Refer Android DownloadManager Listen to Download Complete and Cancel event/action NOTE: You might want to implement a broadcast receiver for DownloadManager.ACTION_NOTIFICATION_CLICKED to appropriately handle when the user clicks on a running download in a notification or from the downloads UI.

By Desmond Lua

A dream boy who enjoys programming and travelling, maker of Travelopy. Follow me on @d_luaz.

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