DeviceStore

Last updated:2026-03-05 17:36:40

DeviceStore

Last updated: 2026-03-05 17:36:40

Introduction
DeviceStore provides a comprehensive set of APIs to manage audio and video devices, including microphone, camera and screen sharing features.
Important: 
Use DeviceStore.shared singleton to get the DeviceStore instance. Do not attempt to initialize directly.
Note: 
Device state updates are delivered through the deviceState publisher. Subscribe to it to receive real-time updates about microphone, camera, network and other states.
Features
Microphone Management：Open/close microphone, set capture volume and output volume
Camera Management：Open/close camera, switch front/rear camera, set mirror and video quality
Audio Route：Switch between speaker and earpiece
Screen Sharing：Start and stop screen sharing feature
Network Status：Real-time monitoring of network quality information
Subscribable Data
DeviceState fields are described below:
Property
Type
Description
microphoneStatus
StateFlow<DeviceStatus>
Microphone status.
microphoneLastError
StateFlow<DeviceError>
Microphone error, used to extract error information when an error occurs.
captureVolume
StateFlow<Int>
Capture volume, range [0, 100].
currentMicVolume
StateFlow<Int>
Current user's actual output volume.
outputVolume
StateFlow<Int>
Maximum output volume, range [0, 100].
cameraStatus
StateFlow<DeviceStatus>
Camera status.
cameraLastError
StateFlow<DeviceError>
Camera error, used to extract error information when an error occurs.
isFrontCamera
StateFlow<Boolean>
Whether it's front camera.
localMirrorType
StateFlow<MirrorType>
Mirror state.
localVideoQuality
StateFlow<VideoQuality>
Local video quality.
currentAudioRoute
StateFlow<AudioRoute>
Current audio route location.
screenStatus
StateFlow<DeviceStatus>
Screen sharing status.
networkInfo
StateFlow<NetworkInfo>
Network information.
API List
Function
Description
DeviceStore.shared
Singleton object.
openLocalMicrophone
Open local microphone.
closeLocalMicrophone
Close local microphone.
setCaptureVolume
Set capture volume.
setOutputVolume
Set output volume.
setAudioRoute
Set audio route.
startCameraTest
Start camera test.
stopCameraTest
Stop camera test.
openLocalCamera
Open local camera.
closeLocalCamera
Close local camera.
switchCamera
Switch camera.
switchMirror
Switch mirror state.
updateVideoQuality
Update video quality.
startScreenShare
Start screen sharing.
stopScreenShare
Stop screen sharing.
reset
Reset to default state.
Getting Instance
DeviceStore.shared
Singleton object
Microphone Operations
openLocalMicrophone
Open local microphone
abstract fun openLocalMicrophone(completion: CompletionHandler?)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
completion
CompletionHandler?
Required
Whether operation succeeded.
closeLocalMicrophone
Close local microphone
abstract fun closeLocalMicrophone()
Version
Supported since version 3.5.
setCaptureVolume
Set capture volume
abstract fun setCaptureVolume(volume: Int)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
volume
Int
Required
Capture volume, range [0, 100].
setOutputVolume
Set maximum output volume
abstract fun setOutputVolume(volume: Int)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
volume
Int
Required
Maximum volume, range [0, 100].
Audio Route
setAudioRoute
Set audio route
abstract fun setAudioRoute(audioRoute: AudioRoute)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
audioRoute
AudioRoute
Required
Route location.
Camera Operations
startCameraTest
Start camera test, if camera opens successfully, the view will be rendered to the set CameraView
abstract fun startCameraTest(cameraView: CameraView, completion: CompletionHandler?)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
cameraView
CameraView
Required
Rendering view for camera capture.
completion
CompletionHandler?
Required
Whether operation succeeded.
stopCameraTest
Stop camera test
abstract fun stopCameraTest()
Version
Supported since version 3.5.
openLocalCamera
Open local camera
abstract fun openLocalCamera(isFront: Boolean, completion: CompletionHandler?)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
isFront
Boolean
Required
Whether front camera.
completion
CompletionHandler?
Required
Whether operation succeeded.
closeLocalCamera
Close local camera
abstract fun closeLocalCamera()
Version
Supported since version 3.5.
switchCamera
Switch camera
abstract fun switchCamera(isFront: Boolean)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
isFront
Boolean
Required
Whether front camera.
switchMirror
Switch mirror state
abstract fun switchMirror(mirrorType: MirrorType)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
mirrorType
MirrorType
Required
Mirror state.
updateVideoQuality
Update video quality
abstract fun updateVideoQuality(quality: VideoQuality)
Version
Supported since version 3.5.
Parameters
Parameter
Type
Required
Description
quality
VideoQuality
Required
Video quality.
Screen Sharing
startScreenShare
Start screen sharing
abstract fun startScreenShare()
Version
Supported since version 3.5.
stopScreenShare
Stop screen capture
abstract fun stopScreenShare()
Version
Supported since version 3.5.
Reset
reset
Reset to default state
abstract fun reset()
Version
Supported since version 3.5.
Data Structures
DeviceType
Device type
Enum Value
Value
Description
MICROPHONE
0
Microphone type.
CAMERA
1
Camera type.
SCREEN_SHARE
2
Screen sharing type.
DeviceError
Device related error codes
Enum Value
Value
Description
NO_ERROR
0
Operation successful.
NO_DEVICE_DETECTED
1
No device detected.
NO_SYSTEM_PERMISSION
2
No system permission.
NOT_SUPPORT_CAPTURE
3
Capture not supported.
OCCUPIED_ERROR
4
Device occupied.
UNKNOWN_ERROR
5
Unknown error.
DeviceStatus
Device on/off status
Enum Value
Value
Description
OFF
0
Off.
ON
1
On.
AudioRoute
Audio route
Enum Value
Value
Description
SPEAKERPHONE
0
Speaker, using speaker to play (i.e., "hands-free"), located at the bottom of the phone, louder sound, suitable for playing music out loud.
EARPIECE
1
Earpiece, using earpiece to play, located at the top of the phone, quieter sound, suitable for private call scenarios.
VideoQuality
Video quality
Enum Value
Value
Description
QUALITY_360P
1
360P.
QUALITY_540P
2
540P.
QUALITY_720P
3
720P.
QUALITY_1080P
4
1080P.
NetworkQuality
Network quality
Enum Value
Value
Description
UNKNOWN
0
Unknown network.
EXCELLENT
1
Excellent.
GOOD
2
Good.
POOR
3
Poor.
BAD
4
Bad.
VERY_BAD
5
Very bad.
DOWN
6
Disconnected.
MirrorType
Camera mirror state
Enum Value
Value
Description
AUTO
0
Auto, front camera mirrored, rear camera not mirrored.
ENABLE
1
Both front and rear cameras mirrored.
DISABLE
2
Neither front nor rear camera mirrored.
DeviceFocusOwner
Device focus
Enum Value
Description
call
Voice call scenario.
live
Live streaming scenario.
none
Not set.
NetworkInfo
Network information
Property
Type
Description
userID
String
User unique ID.
quality
NetworkQuality
Network quality.
upLoss
Int
Uplink packet loss rate, range [0, 100].
downLoss
Int
Downlink packet loss rate, range [0, 100].
delay
Int
Latency (unit: milliseconds).
DeviceState
Device state
Property
Type
Description
microphoneStatus
StateFlow<DeviceStatus>
Microphone status.
microphoneLastError
StateFlow<DeviceError>
Microphone error, used to extract error information when an error occurs.
captureVolume
StateFlow<Int>
Capture volume, range [0, 100].
currentMicVolume
StateFlow<Int>
Current user's actual output volume.
outputVolume
StateFlow<Int>
Maximum output volume, range [0, 100].
cameraStatus
StateFlow<DeviceStatus>
Camera status.
cameraLastError
StateFlow<DeviceError>
Camera error, used to extract error information when an error occurs.
isFrontCamera
StateFlow<Boolean>
Whether it's front camera.
localMirrorType
StateFlow<MirrorType>
Mirror state.
localVideoQuality
StateFlow<VideoQuality>
Local video quality.
currentAudioRoute
StateFlow<AudioRoute>
Current audio route location.
screenStatus
StateFlow<DeviceStatus>
Screen sharing status.
networkInfo
StateFlow<NetworkInfo>
Network information.
Usage Example
// Get singleton instance
val store = DeviceStore.shared()
﻿
// Subscribe to state changes
lifecycleScope.launch {
    store.deviceState.microphoneStatus.collect { status ->
        println("Microphone status: $status")
    }
}
﻿
lifecycleScope.launch {
    store.deviceState.cameraStatus.collect { status ->
        println("Camera status: $status")
    }
}
﻿
// Open microphone
store.openLocalMicrophone { code, message ->
    if (code == 0) {
        println("Microphone opened successfully")
    }
}
﻿
// Open front camera
store.openLocalCamera(isFront = true) { code, message ->
    if (code == 0) {
        println("Camera opened successfully")
    }
}
﻿

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Property	Type	Description
microphoneStatus	StateFlow<DeviceStatus>	Microphone status.
microphoneLastError	StateFlow<DeviceError>	Microphone error, used to extract error information when an error occurs.
captureVolume	StateFlow<Int>	Capture volume, range [0, 100].
currentMicVolume	StateFlow<Int>	Current user's actual output volume.
outputVolume	StateFlow<Int>	Maximum output volume, range [0, 100].
cameraStatus	StateFlow<DeviceStatus>	Camera status.
cameraLastError	StateFlow<DeviceError>	Camera error, used to extract error information when an error occurs.
isFrontCamera	StateFlow<Boolean>	Whether it's front camera.
localMirrorType	StateFlow<MirrorType>	Mirror state.
localVideoQuality	StateFlow<VideoQuality>	Local video quality.
currentAudioRoute	StateFlow<AudioRoute>	Current audio route location.
screenStatus	StateFlow<DeviceStatus>	Screen sharing status.
networkInfo	StateFlow<NetworkInfo>	Network information.

Function	Description
DeviceStore.shared	Singleton object.
openLocalMicrophone	Open local microphone.
closeLocalMicrophone	Close local microphone.
setCaptureVolume	Set capture volume.
setOutputVolume	Set output volume.
setAudioRoute	Set audio route.
startCameraTest	Start camera test.
stopCameraTest	Stop camera test.
openLocalCamera	Open local camera.
closeLocalCamera	Close local camera.
switchCamera	Switch camera.
switchMirror	Switch mirror state.
updateVideoQuality	Update video quality.
startScreenShare	Start screen sharing.
stopScreenShare	Stop screen sharing.
reset	Reset to default state.

Parameter	Type	Required	Description
completion	CompletionHandler?	Required	Whether operation succeeded.

Enum Value	Value	Description
MICROPHONE	0	Microphone type.
CAMERA	1	Camera type.
SCREEN_SHARE	2	Screen sharing type.

Enum Value	Description
call	Voice call scenario.
live	Live streaming scenario.
none	Not set.

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Introduction

Features

Subscribable Data

API List

Getting Instance

DeviceStore.shared

Microphone Operations

openLocalMicrophone

closeLocalMicrophone

setCaptureVolume

setOutputVolume

Audio Route

setAudioRoute

Camera Operations

startCameraTest

stopCameraTest

openLocalCamera

closeLocalCamera

switchCamera

switchMirror

updateVideoQuality

Screen Sharing

startScreenShare

stopScreenShare

Reset

reset

Data Structures

DeviceType

DeviceError

DeviceStatus

AudioRoute

VideoQuality

NetworkQuality

MirrorType

DeviceFocusOwner

NetworkInfo

DeviceState

Usage Example