Java – Notification Bar – How to open File Explorer at a specified location when clicked

I made a major update on my issue due to some misunderstandings.

So, I have a notice. When I click on that notification, I want to open the File Explorer app (a third-party app, of course). Regardless of the app, if it exceeds the file browser, it should prompt “open with” — and then open /sdcard/folder (if possible).

My notifications are on Listar.class

NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(R.drawable.ic_menu_save, msg, System.currentTimeMillis());
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, Open.class), 0);
        notification.setLatestEventInfo(this, filename+" downloaded", "Click to open folder", contentIntent);
        manager.notify(1, notification);

My public class is here:

public class Open extends Activity {

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

try{
        Intent intent = new Intent("org.openintents.action.PICK_FILE");
        startActivityForResult(intent, 1);
    }

catch(Exception e)
    {
        Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
        Log.v("EX",e.toString());
    }
    }

}

This opens the OI file manager (no “open with” – I didn’t select the default app) and /sdcard, which is why I need your help.

Intent toLaunch = new Intent();
toLaunch.setAction(android.content.Intent.ACTION_VIEW);
toLaunch.setDataAndType(Uri.fromFile(new File("file_path")), MimeTypeMap.getSingleton().getMimeTypeFromExtension("jpeg"));   you can also change jpeg to other types

Instead of:

PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, Open.class), 0);

Write:

PendingIntent contentIntent = PendingIntent.getActivity(this, 0, toLaunch , 0);