我在 android 中使用 Twilio 可编程聊天 API 进行一对一聊天。
以下是我的用例:
1) I create a unique channel name
2) Check if the channel already exists or not
if channel exists:
user joins channel
else
create a channel with unique name
user joins channel
end
现在,发生的事情是,当我尝试加入 channel 时,出现错误:“成员已存在”。因此,此时如果我尝试检查 channel 的成员,我会得到 Member 对象为空。 在这一点上我有两个疑问:
1) 如果这个成员已经是 channel 的一部分,用户对象不应该包含这个成员吗? 2) 如果用户已经是 channel 的一部分,我应该能够通过添加 channelListener 向 channel 发送消息,在这种情况下不会发生这种情况。
我不明白这个问题。以下是我的代码 fragment :
ChatClient.Properties props = new ChatClient.Properties.Builder()
.createProperties();
ChatClient.create(ChatActivity.this, accessToken, props, mChatClientCallback);
private CallbackListener<ChatClient> mChatClientCallback =
new CallbackListener<ChatClient>() {
@Override
public void onSuccess(ChatClient chatClient) {
mChatClient = chatClient;
//loadChannels();
Log.i(TAG, "Success creating Twilio Chat Client");
createOrJoinChannel();
}
@Override
public void onError(ErrorInfo errorInfo) {
Log.i(TAG,"Error creating Twilio Chat Client: " + errorInfo.getMessage());
}
};
private void createOrJoinChannel(){
//Only SID or unique name of channel can be supplied as parameter
mChatClient.getChannels().getChannel(UNIQUE_CHANNEL_NAME, new CallbackListener<Channel>() {
@Override
public void onSuccess(Channel channel) {
if (channel != null) {
joinChannel(channel);
} else {
Log.i(TAG, "Error occurred in getting channel");
}
}
@Override
public void onError(ErrorInfo errorInfo) {
Log.i(TAG,"Error retrieving channel: " + errorInfo.getMessage());
createChannel();
}
});
}
private void joinChannel(final Channel channel) {
Log.i(TAG, "inside join channel" + channel.getUniqueName());
Log.i(TAG, "channel status: " + channel.getStatus());
Members members = channel.getMembers();
if(members!=null){
ArrayList<Member> list = (ArrayList<Member>) members.getMembersList();
for(int i=0; i<list.size(); i++){
Log.i(TAG, "member " + i + list.get(i).getIdentity());
}
}else{
Log.i(TAG, "null object"); //Getting this even when I get
//"Member already exists" error
}
channel.join(new StatusListener() {
@Override
public void onSuccess() {
mGeneralChannel = channel;
mGeneralChannel.addListener(mDefaultChannelListener);
}
@Override
public void onError(ErrorInfo errorInfo) {
//Error joining channel: Member already exists
Log.i(TAG,"Error joining channel: " + errorInfo.getMessage());
});
}
private void createChannel(){
mChatClient.getChannels().createChannel(FRIENDLY_CHANNEL_NAME,
Channel.ChannelType.PUBLIC, new CallbackListener<Channel>() {
@Override
public void onSuccess(Channel channel) {
if (channel != null) {
setUniqueNameAndJoin(channel);
}
}
@Override
public void onError(ErrorInfo errorInfo) {
Log.i(TAG,"chats: " + "Unique name could not be set: " + errorInfo.getMessage());
}
});
}
private void setUniqueNameAndJoin(final Channel channel){
channel.setUniqueName(UNIQUE_CHANNEL_NAME, new StatusListener() {
@Override
public void onSuccess() {
Log.i(TAG, "channel with unique name created " + channel.getUniqueName());
joinChannel(channel);
}
@Override
public void onError(ErrorInfo errorInfo) {
super.onError(errorInfo);
}
});
}
private ChannelListener mDefaultChannelListener = new ChannelListener() {
@Override
public void onMessageAdded(final Message message) {
Log.i(TAG, "Message added");
ChatActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// need to modify user interface elements on the UI thread
mMessages.add(message);
mMessagesAdapter.notifyItemInserted(mMessages.size()-1);
}
});
}
@Override
public void onMessageUpdated(Message message, Message.UpdateReason updateReason) {
Log.i(TAG, "Message updated: " + message.getMessageBody());
}
@Override
public void onMessageDeleted(Message message) {
Log.d(TAG, "Message deleted");
}
@Override
public void onMemberAdded(Member member) {
Log.i(TAG, "Member added: " + member.getIdentity());
}
@Override
public void onMemberUpdated(Member member, Member.UpdateReason updateReason) {
}
@Override
public void onMemberDeleted(Member member) {
}
@Override
public void onTypingStarted(Channel channel, Member member) {
}
@Override
public void onTypingEnded(Channel channel, Member member) {
}
@Override
public void onSynchronizationChanged(Channel channel) {
}
};
有人可以向我解释一下,我做错了什么或者正确的做事方式应该是什么?提前致谢!
最佳答案
此处为 Twilio 开发人员布道师。
您需要检查当前用户的 channel 状态,使用 channel.getStatus()
. Android chat tutorial 中有一个很好的例子.
if (this.currentChannel.getStatus() == Channel.ChannelStatus.JOINED) {
// already in the channel, load the messages
} else {
// join the channel
}
关于android - Twilio 安卓 : Issue in joining a channel : "Member already exists",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50736285/