问题描述
我正在实施 Twilio Chat SDK,我在私人频道中添加成员。流程是这样的,首先我检查我的列表中是否有频道。如果它存在,那么我加入它。如果我的列表中没有频道,我首先创建它,然后加入它,然后添加具有唯一名称的成员。当我运行我的应用程序时,客户端被创建,在通道进程完成后它崩溃并出现以下错误:
com.twilio.chat.ListenerException: Exception thrown by a listener. Your application might have a problem in listener implementation. Listeners must never throw uncaught exceptions. See 'Caused by:' below for more details.
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at com.twilio.chat.internal.RethrowingForwarder$RethrowingProxy.invoke(RethrowingForwarder.java:123)
at java.lang.reflect.Proxy.invoke(Proxy.java:1006)
at $Proxy17.onError(UnkNown Source)
at com.twilio.chat.internal.StatusListenerForwarder$2.run(StatusListenerForwarder.java:46)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:237)
at android.app.ActivityThread.main(ActivityThread.java:8167)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:496)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1100)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.twilio.chat.Members.addByIdentity(java.lang.String,com.twilio.chat.StatusListener)' on a null object reference
at com.zofeur.customer.views.fragments.SupportFragment.addMemberInChannel(SupportFragment.kt:259)
at com.zofeur.customer.views.fragments.SupportFragment.access$addMemberInChannel(SupportFragment.kt:22)
at com.zofeur.customer.views.fragments.SupportFragment$joinChannel$1.onError(SupportFragment.kt:249)
我一直在寻找多种解决方案,但无法做到。
以下是我的 Fragment 的代码:
支持片段:
private fun createChannel(channelUniqueName: String) {
mviewmodel.chatClient?.channels?.getChannel(channelUniqueName,object : CallbackListener<Channel>() {
override fun onSuccess(channel: Channel?) {
if (channel != null) {
mviewmodel.channel = channel
joinChannel(channel)
}
}
override fun onError(errorInfo: ErrorInfo?) {
super.onError(errorInfo)
if (errorInfo?.code == Constants.ERROR_CHANNEL_NOT_FOUND) {
mviewmodel.chatClient?.channels?.channelBuilder()
?.withUniqueName(channelUniqueName)
?.withType(Channel.ChannelType.PRIVATE)
?.build(object : CallbackListener<Channel>() {
override fun onSuccess(channel: Channel?) {
requireContext().T("Channel Created $channel")
if (channel != null) {
mviewmodel.channel = channel
joinChannel(channel)
}
}
})
} else {
requireContext().T("Channel not created" + errorInfo.toString())
}
}
})
}
private fun joinChannel(channel: Channel) {
channel.join(object : StatusListener() {
override fun onSuccess() {
requireContext().T("Channel Joined" + channel.uniqueName)
addMemberInChannel(channel,identity)
}
override fun onError(errorInfo: ErrorInfo) {
if (errorInfo.code == Constants.ERROR_MEMBER_ALREADY_EXISTS) {
// already join member
addMemberInChannel(channel,identity)
} else {
requireContext().T("Error joining channel$errorInfo")
}
}
})
}
private fun addMemberInChannel(channel: Channel,identity: String) {
if (mviewmodel.channel.createdBy == mviewmodel.chatClient.myIdentity) {
channel.members.addByIdentity(identity,object : StatusListener() {
override fun onSuccess() {
requireContext().T("Member added successfully" + channel.uniqueName)
}
override fun onError(errorInfo: ErrorInfo?) {
super.onError(errorInfo)
requireContext().T("Channel member added error" + errorInfo.toString())
}
})
} else {
requireContext().T("You cannot add member,You don't have rights.")
}
}
任何形式的帮助都会非常有帮助。提前致谢。
解决方法
嗨,我遇到了同样的问题,当我调试更长时间时,我发现当你创建一个频道时,它有 3 个状态:
- SynchronizationStatus_STARTED
- SynchronizationStatus_CHANNELS_COMPLETED
- SyncronizationStatus_COMPLETED
您需要在客户端SyncronizationStatus_COMPLETED之后执行任何与频道相关的操作希望它可以正常工作,谢谢
client.addListener(object :ChatClientListener{
override fun onClientSynchronization(p0:
ChatClient.SynchronizationStatus?) {
if (p0 == ChatClient.SynchronizationStatus.COMPLETED) {
// Client is now ready for business,start working
mViewModel.chatClient = client
}
}
}