if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {          Intent intent = new Intent();          intent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");          intent.putExtra("app_package", getActivity().getPackageName());          intent.putExtra("app_uid", getActivity().getApplicationInfo().uid);          startActivity(intent);        } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {          Intent intent = new Intent();          intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);          intent.addCategory(Intent.CATEGORY_DEFAULT);          intent.setData(Uri.parse("package:" + getActivity().getPackageName()));          startActivity(intent);        }

 Intent localIntent = new Intent();        localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        if (Build.VERSION.SDK_INT >= 9) {          localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");          localIntent.setData(Uri.fromParts("package", getActivity().getPackageName(), null));        } else if (Build.VERSION.SDK_INT <= 8) {          localIntent.setAction(Intent.ACTION_VIEW);          localIntent.setClassName("com.android.settings", "com.android.settings.InstalledAppDetails");          localIntent.putExtra("com.android.settings.ApplicationPkgName", getActivity().getPackageName());        }        startActivity(localIntent);

NotificationManagerCompat manager = NotificationManagerCompat.from(App.getInstance().getContext());boolean isOpened = manager.areNotificationsEnabled();