rules:
  - id: exported_activity_improved
    patterns:
      - pattern: |
          <activity
            ...
            android:exported="true"
            ...
          >
            ...
          </activity>
      - pattern-not: |
          <activity
            ...
            android:exported="true"
            ...
          >
            ...
            <intent-filter>
              <action android:name="android.intent.action.MAIN"/>
              <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
            ...
          </activity>
    message: Non-launcher activity is exported. Review if this needs to be accessible from other apps.
    languages: [xml]
    severity: WARNING