Enclosing class:

PeerConnection
```
public static interface PeerConnection.Observer
```
Java version of PeerConnectionObserver.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`onAddStream(MediaStream stream)`	Triggered when media is received on a new stream from remote peer.
`default void`	`onAddTrack(RtpReceiver receiver, MediaStream[] mediaStreams)`	Triggered when a new track is signaled by the remote peer, as a result of setRemoteDescription.
`default void`	`onConnectionChange(PeerConnection.PeerConnectionState newState)`	Triggered when the PeerConnectionState changes.
`void`	`onDataChannel(DataChannel dataChannel)`	Triggered when a remote peer opens a DataChannel.
`void`	`onIceCandidate(IceCandidate candidate)`	Triggered when a new ICE candidate has been found.
`default void`	`onIceCandidateError(IceCandidateErrorEvent event)`	Triggered when gathering of an ICE candidate failed.
`void`	`onIceCandidatesRemoved(IceCandidate[] candidates)`	Triggered when some ICE candidates have been removed.
`void`	`onIceConnectionChange(PeerConnection.IceConnectionState newState)`	Triggered when the IceConnectionState changes.
`void`	`onIceConnectionReceivingChange(boolean receiving)`	Triggered when the ICE connection receiving status changes.
`void`	`onIceGatheringChange(PeerConnection.IceGatheringState newState)`	Triggered when the IceGatheringState changes.
`void`	`onRemoveStream(MediaStream stream)`	Triggered when a remote peer close a stream.
`default void`	`onRemoveTrack(RtpReceiver receiver)`	Triggered when a previously added remote track is removed by the remote peer, as a result of setRemoteDescription.
`void`	`onRenegotiationNeeded()`	Triggered when renegotiation is necessary.
`default void`	`onSelectedCandidatePairChanged(CandidatePairChangeEvent event)`	Triggered when the ICE candidate pair is changed.
`void`	`onSignalingChange(PeerConnection.SignalingState newState)`	Triggered when the SignalingState changes.
`default void`	`onStandardizedIceConnectionChange(PeerConnection.IceConnectionState newState)`
`default void`	`onTrack(RtpTransceiver transceiver)`	Triggered when the signaling from SetRemoteDescription indicates that a transceiver will be receiving media from a remote endpoint.

- Method Detail
  - onSignalingChange
```
void onSignalingChange(PeerConnection.SignalingState newState)
```
    Triggered when the SignalingState changes.
  - onIceConnectionChange
```
void onIceConnectionChange(PeerConnection.IceConnectionState newState)
```
    Triggered when the IceConnectionState changes.
  - onStandardizedIceConnectionChange
```
default void onStandardizedIceConnectionChange(PeerConnection.IceConnectionState newState)
```
  - onConnectionChange
```
default void onConnectionChange(PeerConnection.PeerConnectionState newState)
```
    Triggered when the PeerConnectionState changes.
  - onIceConnectionReceivingChange
```
void onIceConnectionReceivingChange(boolean receiving)
```
    Triggered when the ICE connection receiving status changes.
  - onIceGatheringChange
```
void onIceGatheringChange(PeerConnection.IceGatheringState newState)
```
    Triggered when the IceGatheringState changes.
  - onIceCandidate
```
void onIceCandidate(IceCandidate candidate)
```
    Triggered when a new ICE candidate has been found.
  - onIceCandidateError
```
default void onIceCandidateError(IceCandidateErrorEvent event)
```
    Triggered when gathering of an ICE candidate failed.
  - onIceCandidatesRemoved
```
void onIceCandidatesRemoved(IceCandidate[] candidates)
```
    Triggered when some ICE candidates have been removed.
  - onSelectedCandidatePairChanged
```
default void onSelectedCandidatePairChanged(CandidatePairChangeEvent event)
```
    Triggered when the ICE candidate pair is changed.
  - onAddStream
```
void onAddStream(MediaStream stream)
```
    Triggered when media is received on a new stream from remote peer.
  - onRemoveStream
```
void onRemoveStream(MediaStream stream)
```
    Triggered when a remote peer close a stream.
  - onDataChannel
```
void onDataChannel(DataChannel dataChannel)
```
    Triggered when a remote peer opens a DataChannel.
  - onRenegotiationNeeded
```
void onRenegotiationNeeded()
```
    Triggered when renegotiation is necessary.
  - onAddTrack
```
default void onAddTrack(RtpReceiver receiver,
                        MediaStream[] mediaStreams)
```
    Triggered when a new track is signaled by the remote peer, as a result of setRemoteDescription.
  - onRemoveTrack
```
default void onRemoveTrack(RtpReceiver receiver)
```
    Triggered when a previously added remote track is removed by the remote peer, as a result of setRemoteDescription.
  - onTrack
```
default void onTrack(RtpTransceiver transceiver)
```
    Triggered when the signaling from SetRemoteDescription indicates that a transceiver will be receiving media from a remote endpoint. This is only called if UNIFIED_PLAN semantics are specified. The transceiver will be disposed automatically.

Interface PeerConnection.Observer

Method Summary

Method Detail

onSignalingChange

onIceConnectionChange

onStandardizedIceConnectionChange

onConnectionChange

onIceConnectionReceivingChange

onIceGatheringChange

onIceCandidate

onIceCandidateError

onIceCandidatesRemoved

onSelectedCandidatePairChanged

onAddStream

onRemoveStream

onDataChannel

onRenegotiationNeeded

onAddTrack

onRemoveTrack

onTrack