The default Android camera app will read them for you (and display the URL before you tap to open it in a browser) by either pointing the default camera at a QR code or manually scanning it with the "Lens" camera mode.
The Android wifi menu (where you select from nearby networks to join) also has a QR icon that lets you scan to immediately join a network (next to "Add network"). I'd imagine you'd also join if you scanned it from the camera app, too.
The Android wifi menu (where you select from nearby networks to join) also has a QR icon that lets you scan to immediately join a network (next to "Add network"). I'd imagine you'd also join if you scanned it from the camera app, too.