Android xmpp開發 asmack獲取離線在線添加好友消息 及 好友上線下線通知
直接上代碼,看註釋應該很好理解,只是提供一種思路,不對的請大神指正:
public class PresenceService extends Service {
private _ConnectionControl cc = _ConnectionControl.getCC();//單例模式 保存了當前的鏈接
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
}
@Override
public void onDestroy() {
super.onDestroy();
Log.i("onDestroy", "PresenceService -- onDestroy");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("Presence", "PresenceService-----" + (cc.connection == null));
if (cc.connection != null && cc.connection.isConnected()
&& cc.connection.isAuthenticated()) {//已經認證的情況下,才能正確收到Presence包(也就是登陸)
final String loginuser = cc.connection.getUser().substring(0,
cc.connection.getUser().lastIndexOf("@"));
//理解爲條件過濾器 過濾出Presence包
PacketFilter filter = new AndFilter(new PacketTypeFilter(
Presence.class));
PacketListener listener = new PacketListener() {
@Override
public void processPacket(Packet packet) {
Log.i("Presence", "PresenceService------" + packet.toXML());
//看API可知道 Presence是Packet的子類
if (packet instanceof Presence) {
Log.i("Presence", packet.toXML());
Presence presence = (Presence) packet;
//Presence還有很多方法,可查看API
String from = presence.getFrom();//發送方
String to = presence.getTo();//接收方
//Presence.Type有7中狀態
if (presence.getType().equals(Presence.Type.subscribe)) {//好友申請
} else if (presence.getType().equals(
Presence.Type.subscribed)) {//同意添加好友
} else if (presence.getType().equals(
Presence.Type.unsubscribe)) {//拒絕添加好友 和 刪除好友
} else if (presence.getType().equals(
Presence.Type.unsubscribed)) {//這個我沒用到
} else if (presence.getType().equals(
Presence.Type.unavailable)) {//好友下線 要更新好友列表,可以在這收到包後,發廣播到指定頁面 更新列表
} else {//好友上線
}
}
}
};
cc.connection.addPacketListener(listener, filter);
}
return super.onStartCommand(intent, flags, startId);
}
}