can we open download folder via. intent?

You can show the recent downloads activity with the following Intent

startActivity(new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS));

Available since API 9

Samsung solution:

public static void openDownloads(@NonNull Activity activity) {    if (isSamsung()) {        Intent intent = activity.getPackageManager()                .getLaunchIntentForPackage("com.sec.android.app.myfiles");        intent.setAction("samsung.myfiles.intent.action.LAUNCH_MY_FILES");        intent.putExtra("samsung.myfiles.intent.extra.START_PATH",                 getDownloadsFile().getPath());        activity.startActivity(intent);    }    else activity.startActivity(new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS));}public static boolean isSamsung() {    String manufacturer = Build.MANUFACTURER;    if (manufacturer != null) return manufacturer.toLowerCase().equals("samsung");    return false;}public static File getDownloadsFile() {    return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);}

Found by decompiling the Samsung My Files app dex and seeing how the MainActivity deals with intents.

public static final String MYFILES_NOTIFICATION_LAUNCH_INTENT_NAME = "samsung.myfiles.intent.action.LAUNCH_MY_FILES";public static final String NOTIFICATION_START_PATH = "samsung.myfiles.intent.extra.START_PATH";public static final String START_PATH = "FOLDERPATH";if (Constant.MYFILES_NOTIFICATION_LAUNCH_INTENT_NAME.equals(intent.getAction())) {                String startNotificationPath = intent.getStringExtra(Constant.NOTIFICATION_START_PATH);                if (startNotificationPath != null) {                    Bundle newArgument = new Bundle();                    newArgument.putString(Constant.START_PATH, startNotificationPath);                    if (new File(startNotificationPath).exists()) {                        startBrowser(513, newArgument);                    }                }                intent.removeExtra(Constant.NOTIFICATION_START_PATH);            }

I had similar problem showing files in Downloads in Samsung and LG and i just added file-parameter "downloaded" for DownloadManager and file showing in Downloads:

  DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);        downloadManager.addCompletedDownload(file.getName(), file.getName(), true,                "application", file.getPath(), file.length(), true);