Added in [API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

# TelephonyCallback.CarrierNetworkListener

*** ** * ** ***


`
public
static


interface
TelephonyCallback.CarrierNetworkListener
`


`


`

|---|
| android.telephony.TelephonyCallback.CarrierNetworkListener |

<br />

*** ** * ** ***

Interface for carrier network listener.

## Summary

| ### Public methods ||
|---|---|
| ` abstract void` | ` https://developer.android.com/reference/android/telephony/TelephonyCallback.CarrierNetworkListener#onCarrierNetworkChange(boolean)(boolean active) ` Callback invoked when telephony has received notice from a carrier app that a network action that could result in connectivity loss has been requested by an app using `https://developer.android.com/reference/android/service/carrier/CarrierService#notifyCarrierNetworkChange(boolean)` This is optional and is only used to allow the system to provide alternative UI while telephony is performing an action that may result in intentional, temporary network lack of connectivity. |

## Public methods

### onCarrierNetworkChange

Added in [API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract void onCarrierNetworkChange (boolean active)
```

Callback invoked when telephony has received notice from a carrier
app that a network action that could result in connectivity loss
has been requested by an app using
`https://developer.android.com/reference/android/service/carrier/CarrierService#notifyCarrierNetworkChange(boolean)`


This is optional and is only used to allow the system to provide alternative UI while
telephony is performing an action that may result in intentional, temporary network
lack of connectivity.


Note, this callback is pinned to the registered subscription and will be invoked when
the notifying carrier app has carrier privilege rule on the registered
subscription. `https://developer.android.com/reference/android/telephony/TelephonyManager#hasCarrierPrivileges()`

<br />

| Parameters ||
|---|---|
| `active` | `boolean`: If the carrier network change is or shortly will be active, `true` indicate that showing alternative UI, `false` otherwise. <br /> |