Voice SDK for Android
- API Overview
  Agora provides ensured quality of experience (QoE) for worldwide Internet-based voice and video communications through SD-RTN™.
- RtcEngine
  The basic interface of the Agora SDK that implements the core functions of real-time communication.
- RtcEngineEx
  This interface class contains multi-channel methods.
- IRtcEngineEventHandler
  IRtcEngineEventHandlerThe SDK uses the interface to send event notifications to your app. Your app can get those notifications through methods that inherit this interface.
- IAudioEffectManager
  This class provides audio management methods.
- IAudioEncodedFrameObserver
  The encoded audio observer.
- IMediaExtensionObserver
  Extension event callback interface class.
- IMediaPlayer
  This class provides media player functions and supports multiple instances.
- IMediaPlayerAudioFrameObserver
  The audio frame observer for the media player.
- IMediaPlayerCacheManager
  This class provides methods to manage cached media files.
- IMediaPlayerCustomDataProvider
  The callback for custom media resource files.
- IMediaPlayerObserver
  Provides callbacks for media players.
- IMediaPlayerVideoFrameObserver
  The video frame observer for the media player.
- IAudioFrameObserver
  The audio frame observer.
- IAudioSpectrumObserver
  The audio spectrum observer.
- IMetadataObserver
  The metadata observer.
- IVideoEncodedFrameObserver
  Receives encoded video images.
- IVideoFrameObserver
  The IVideoFrameObserver class.
- ILocalSpatialAudioEngine
  This class calculates user positions through the SDK to implement the spatial audio effect.
- AgoraMediaRecorder
  Used for recording audio and video on the client.
- IMediaRecorderCallback
  The IMediaRecorderCallback class.
- Class and Enum
  This page lists all the definitions of Class and the enums for Android.

IMediaRecorderCallback

The IMediaRecorderCallback class.

onRecorderStateChanged

Occurs when the recording state changes.

void onRecorderStateChanged(int state, int error);

When the local audio or video recording state changes, the SDK triggers this callback to report the current recording state and the reason for the change.

Parameters

state

The current recording state:

RECORDER_STATE_ERROR(-1): An error occurs during the recording.
RECORDER_STATE_START(2): The audio and video recording starts.
RECORDER_STATE_STOP(3): The audio and video recording stops.

error

The reason for the state change.

RECORDER_ERROR_NONE(0): Everything is normal.
RECORDER_ERROR_WRITE_FAILED(1): The SDK fails to write the recorded data to a file.
RECORDER_ERROR_NO_STREAM(2): The SDK does not detect any audio and video streams, or audio and video streams are interrupted for more than five seconds during recording.
RECORDER_ERROR_OVER_MAX_DURATION(3): The recording duration exceeds the upper limit.
RECORDER_ERROR_CONFIG_CHANGED(4): The configurations of recording change.

onRecorderInfoUpdated

Occurs when the recording information is updated.

void onRecorderInfoUpdated(RecorderInfo info);

After you successfully enable the local audio and video recording, the SDK periodically triggers this callback based on the value of recorderInfoUpdateInterval set in MediaRecorderConfiguration. This callback reports the file name, duration, and size of the current recording file.

Parameters

info: The information about the file that is recorded. See RecorderInfo.