fetchGroupAnnouncement method
从服务器获取群公告
Implementation
void fetchGroupAnnouncement({
final String groupId,
onSuccess(String announcement),
onError(int errorCode, String desc)}){
Future<Map<String, dynamic>> result = _emGroupManagerChannel
.invokeMethod(EMSDKMethod.fetchGroupAnnouncement, {"groupId" : groupId});
result.then((response) {
if (response['success']) {
if (onSuccess != null) {
if(response['value'] != null){
onSuccess(response['value']);
}else{
onSuccess(null);
}
}
} else {
if (onError != null) onError(response['code'], response['desc']);
}
});
}