这是一个视频通话屏幕.它需要令牌和通道名称才能工作,这些名称需要传递给init调用引擎.我将它们存储在一个用作可变状态的数据类中.
屏幕状态数据类
@Keep
data class CallScreenState(
val callerId: Int? = null,
val recieverId: Int? = null,
val chatRoom: ChatRoom.Data? = null,
val rtcToken: AgoraTokenResponse.TokenData? = null
)
并通过该代码处于视图模型初始化状态:
var callScreenState by mutableStateOf(CallScreenState())
在聊天室和令牌API的成功响应视图模型中,使用该代码更新状态.
callScreenState = callScreenState.copy(
chatRoom = chatRoom.data,//from response
rtcToken = token.data //from response
)
From here it is expected to recompose the screen with new updated value of chatRoom and rtcToken.个
在Composable中
val screenState = remember {
viewModel.callScreenState
}
此屏幕状态用于将值传递给init引擎
val mEngine = remember {
initEngine(
context,
object : IRtcEngineEventHandler() {
override fun onJoinChannelSuccess(channel: String?, uid: Int, elapsed: Int) {
Timber.e("hhp-CallScreen onJoinChannelSuccess channel:$channel,uid:$uid,elapsed:$elapsed")
}
override fun onUserJoined(uid: Int, elapsed: Int) {
Timber.e("hhp-CallScreen onUserJoined:$uid")
val desiredUserList = remoteUserMap.toMutableMap()
desiredUserList[uid] = null
remoteUserMap = desiredUserList.toMap() as HashMap<Int, TextureView?>
}
override fun onUserOffline(uid: Int, reason: Int) {
Timber.e("hhp-CallScreen onUserOffline:$uid")
val desiredUserList = remoteUserMap.toMutableMap()
desiredUserList.remove(uid)
remoteUserMap = desiredUserList.toMap() as HashMap<Int, TextureView?>
}
override fun onNetworkQuality(uid: Int, txQuality: Int, rxQuality: Int) {
Timber.e("hhp-CallScreen onNetworkQuality $uid $txQuality $rxQuality")
}
},
screenState.chatRoom?.channelName ?: "", //Not recomposing when value changes in viewmodel
viewModel.userRole,
token = screenState.rtcToken?.token ?: "" //Not recomposing when value changes in viewmodel
)
}
这是initEngine函数的创建
fun initEngine(
current: Context,
eventHandler: IRtcEngineEventHandler,
channelName: String,
userRole: String,
token: String
): RtcEngine =
RtcEngine.create(current, BuildConfig.AGORA_APPID, eventHandler).apply {
enableVideo()
setChannelProfile(1)
if (userRole == "Broadcaster") {
setClientRole(1)
} else {
setClientRole(0)
}
//Expected to be recomposed when screen state value updated with new values
joinChannel(token, channelName, "", 0)
}
我一开始就知道,屏幕内部的频道名和令牌状态是空的,也就是在API调用之前.一旦获取令牌和聊天室的API成功,屏幕状态将从viewModel更新,我预计initEngine Fun将再次被调用,因为它应该重新组合.但事实并非如此.我错过了什么吗?如何让它在屏幕内的Channel Name值发生变化时重新组合?