You can use a Local Only Hotspot to enable applications on devices connected to
the Wi-Fi hotspot to communicate with each other. The network created by this
method will not have Internet access. Each application can make a single request
for the hotspot, but multiple applications can request the hotspot at the same
time. When multiple applications have successfully registered concurrently, they
share the underlying hotspot.
LocalOnlyHotspotCallback.onStarted(LocalOnlyHotspotReservation)
is called when the hotspot is ready for use.
For more details on using Local Only Hotspots, see
startLocalOnlyHotspot().