MuntashirAkon/AppManager · error · IllegalArgumentException

Invalid filter

Error message

Invalid filter: ${filterName}

What it means

FilterOptions.create(filterName) is a factory that maps a filter type name string to a concrete FilterOption subclass via a switch. If the name matches no known case, it throws IllegalArgumentException, rejecting unknown filter identifiers.

Solutions

1. Use one of the exact registered names (e.g. "times_opened", "total_size", "trackers", "uid", "version_name", ...) as matched in the switch.
2. Check the spelling/case of filterName against FilterOptions.create()'s cases.
3. When loading persisted filters from another version, validate/normalize names and drop unknown ones before calling create().

Example fix

// before
FilterOption o = FilterOptions.create("lastmodified");
// after
FilterOption o = FilterOptions.create("last_update");

Set<String> known = Set.of("times_opened", "total_size", "trackers", "uid", "version_name" /* ...all cases */);
if (!known.contains(filterName)) throw new IllegalArgumentException("Unknown filter: " + filterName);

try {
    option = FilterOptions.create(name);
} catch (IllegalArgumentException e) {
    Log.w(TAG, "Unknown filter type, skipping", e);
    option = null;
}

When it happens

Trigger: Calling FilterOptions.create() with a name string not in its switch (e.g. misspelled name like "targt_sdk", a name from a newer/older app version, or an arbitrary string from deserialized JSON/Parcel).

Common situations: Restoring saved filters (JSON via fromJson / Parcel via createFromParcel) written by a different app version whose filter names changed; hand-writing filter rules with a wrong type name; locale/case mistakes in the filter name.

Understand the failure class

Background: Invalid enum value errors: "Unknown type", "Invalid scope", "must be one of" — when a string is not on the library's allowed list — this error's family across 23 libraries.

Related errors

• Bad component name
• Could not mount
• Firewall overlays require Android 13+
• Flags must be returned by the corresponding subclasses. key
• Invalid boolean value

AI-assisted analysis of MuntashirAkon/AppManager@0152f468fc (2026-09-12). Data as JSON: /api/errors/fb7b6757aa4ff2bb. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/java/io/github/muntashirakon/AppManager/filters/options/FilterOptions.java:38

            case "data_usage": return new DataUsageOption();
            case "freeze_unfreeze": return new FreezeOption();
            case "installed": return new InstalledOption();
            case "installer": return new InstallerOption();
            case "last_update": return new LastUpdateOption();
            case "min_sdk": return new MinSdkOption();
            case "permissions": return new PermissionsOption();
            case "pkg_name": return new PackageNameOption();
            case "running_apps": return new RunningAppsOption();
            case "screen_time": return new ScreenTimeOption();
            case "signature": return new SignatureOption();
            case "target_sdk": return new TargetSdkOption();
            case "times_opened": return new TimesOpenedOption();
            case "total_size": return new TotalSizeOption();
            case "trackers": return new TrackersOption();
            case "uid": return new UidOption();
            case "version_name": return new VersionNameOption();
        }
        throw new IllegalArgumentException("Invalid filter: " + filterName);
    }
}

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