Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/android/net/SocketKeepalive.Callback#pubctors) \| [Methods](https://developer.android.com/reference/android/net/SocketKeepalive.Callback#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/net/SocketKeepalive.Callback#inhmethods)

# SocketKeepalive.Callback

*** ** * ** ***

` public static class SocketKeepalive.Callback `   
` extends https://developer.android.com/reference/java/lang/Object ` ` `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.net.SocketKeepalive.Callback |

<br />

*** ** * ** ***

The callback which app can use to learn the status changes of `https://developer.android.com/reference/android/net/SocketKeepalive`. See `https://developer.android.com/reference/android/net/SocketKeepalive`.

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/net/SocketKeepalive.Callback#Callback()() ` |

| ### Public methods ||
|---|---|
| ` void` | ` https://developer.android.com/reference/android/net/SocketKeepalive.Callback#onDataReceived()() ` The keepalive on a TCP socket was stopped because the socket received data. |
| ` void` | ` https://developer.android.com/reference/android/net/SocketKeepalive.Callback#onError(int)(int error) ` An error occurred. |
| ` void` | ` https://developer.android.com/reference/android/net/SocketKeepalive.Callback#onStarted()() ` The requested keepalive was successfully started. |
| ` void` | ` https://developer.android.com/reference/android/net/SocketKeepalive.Callback#onStopped()() ` The keepalive was successfully stopped. |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.

## Public constructors

### Callback

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Callback ()
```

<br />

<br />

## Public methods

### onDataReceived

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void onDataReceived ()
```

The keepalive on a TCP socket was stopped because the socket received data. This is never called for UDP sockets.

<br />

### onError

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void onError (int error)
```

An error occurred.

<br />

| Parameters ||
|---|---|
| `error` | `int`: Value is one of the following: - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_NETWORK` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_IP_ADDRESS` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_PORT` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_LENGTH` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_INTERVAL` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_INVALID_SOCKET` - `https://developer.android.com/reference/android/net/SocketKeepalive#ERROR_SOCKET_NOT_IDLE` |

### onStarted

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void onStarted ()
```

The requested keepalive was successfully started.

<br />

### onStopped

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void onStopped ()
```

The keepalive was successfully stopped.

<br />