我使用asmack 4.0.5在Android上构建了一个XMPP应用程序。我想实现聊天伙伴的在线状态。我可以在Eclipse中使用日志记录功能获取信息,但我无法在Chatting-UI上显示/更新它。我有2个Listener:PacketListener
这对传入消息有好处,并且RosterListener
能够接收到状态,但无法在UI上显示。该PacketListener
是建立这样:Android - XMPP asmack PacketListener引发CalledFromWrongThreadException层次结构视图
PacketFilter filter = new MessageTypeFilter(Message.Type.chat);
connection.addPacketListener(new PacketListener() {
@Override
public void processPacket(Packet packet) {
message = (Message) packet;
if (message.getBody() != null) {
String fromName = StringUtils.parseBareAddress(message
.getFrom());
messages.add(message.getBody());
listMessage.add(new MessageData(message.getBody()));
mHandler.post(new Runnable() {
@SuppressLint("NewApi")
public void run() {
//listview = chatmessages which are updated every time I receive a message
listview.invalidateViews();
}
});
}
}
}, filter);
然后,我有我的RosterListener
:
final Roster roster = connection.getRoster();
roster.addRosterListener(new RosterListener() {
@Override
public void presenceChanged(final Presence presence) {
presenceUser = presence.getFrom();
Presence availability = roster.getPresence(presenceUser);
Mode userMode = availability.getMode();
availableMode.setText(getPresenceStatus(...)); // Here is where a TextView 'availableMode' should be updated, but I get the Error shown below.
}
@Override
public void entriesUpdated(Collection<String> arg0) {
}
@Override
public void entriesDeleted(Collection<String> arg0) {
}
@Override
public void entriesAdded(Collection<String> arg0) {
}
});
每次我RosterListener要更新UI,我得到以下异常:
E/XMPPConnection(1314): Exception in packet listener
E/XMPPConnection(1314):android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
如何使用RosterListener中的传入呈现信息独立更新UI?