您可以使用status\u running来访问下载管理器的状态
https://developer.android.com/reference/android/app/downloadmanager.html#status_running

如果您想在此时开始下载时获取特定下载的状态，downloadmanager.enqueue（）方法返回downloadid，该ID对于每次下载都是唯一的，这样您就可以保存它并使用它来获取如下的下载状态
这里开始下载返回您的下载ID

public long startDownload(String downloadurl) {
                DownloadManager downloadManager =
                        (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
                try {
                    DownloadManager.Request request = new DownloadManager.Request(Uri.parse(downloadurl));
// enqueue method retuns downloadId
                    return  downloadManager.enqueue(request);
                } catch (Exception e) {
                    Log.d("DOWNLOADED_INFO", "startDownload =" + e.getMessage());
                    e.printStackTrace();
                }
                return 0;
            }

此downloadid已传递给getstatus方法

public static int getStatus(Context context , long downloadId) {
    DownloadManager downloadManager =
            (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    DownloadManager.Query query = new DownloadManager.Query();
    query.setFilterById(downloadId);// filter your download bu download Id
    Cursor c = downloadManager.query(query);
    if (c.moveToFirst()) {
        int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));
        c.close();
        Log.i("DOWNLOAD_STATUS", String.valueOf(status));
        return status;
    }
    Log.i("AUTOMATION_DOWNLOAD", "DEFAULT");
    return -1;
}

检查当前文件是否正在下载

public static boolean isDownloading(Context context , long downloadId){
        return getStatus(context , downloadId) == com.mozillaonline.providers.DownloadManager.STATUS_RUNNING;
    }

以上方法用于检查特定下载的状态。如果要检查下载管理器的状态，即任何文件正在下载或处于暂停状态，可以使用此方法进行检查

public static boolean checkStatus(Context context , int status) {
        DownloadManager downloadManager = (DownloadManager)
                context.getSystemService(Context.DOWNLOAD_SERVICE);
        DownloadManager.Query query = new DownloadManager.Query();

        query.setFilterByStatus(status);
        Cursor c = downloadManager.query(query);
        if (c.moveToFirst()) {
            c.close();
            Log.i("DOWNLOAD_STATUS", String.valueOf(status));
            return true;
        }
        Log.i("AUTOMATION_DOWNLOAD", "DEFAULT");
        return false;
    }

然后简单地调用这个方法

checkStatus(context , DownloadManager.STATUS_RUNNING);