download - Android DownloadManager Query for COLUMN_STATUS returns zero -


i'm using download manager downloading file in app. i'm fetching status of download @ time. sometimes, after download goes pending i.e downloadmanager.status_pending, next values of column_status returned zero. 0 status not defined

when have column_status zero? facing similar issue? 

public int checkstatus() {      long downloadid = preference.getinstance(mcontext)             .getenqueuenumber();     if (downloadid == 0) {         return -1;     }      if (dm == null) {         dm = (downloadmanager) mcontext                 .getsystemservice(context.download_service);     }      query mydownloadquery = new query();     // set query filter our enqueued download     mydownloadquery.setfilterbyid(downloadid);     int status = 0;     cursor cursor = null;     // query download manager downloads have been requested.     try {         cursor = dm.query(mydownloadquery);         if (cursor != null && cursor.movetofirst()) {             // column status             int columnindex = cursor                     .getcolumnindex(downloadmanager.column_status);             status = cursor.getint(columnindex);             switch (status) {             case downloadmanager.status_failed:                 dm.remove(downloadid);                 deletefile();                 status = downloadmanager.status_failed;                 break;             case downloadmanager.status_paused:                 status = downloadmanager.status_paused;                 break;             case downloadmanager.status_pending:                 status = downloadmanager.status_pending;                 break;             case downloadmanager.status_running:                 status = downloadmanager.status_running;                 break;             case downloadmanager.status_successful:                 status = downloadmanager.status_successful;                 break;             default:                 break;             }         }     } catch (exception e) {         e.printstacktrace();     } {         if (cursor != null)             cursor.close();     }     return status; }


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