diff --git a/OpenIM-SDK/libs/v3.3.1-rc.8.aar b/OpenIM-SDK/libs/v3.4.1-alpha.4.aar
similarity index 72%
rename from OpenIM-SDK/libs/v3.3.1-rc.8.aar
rename to OpenIM-SDK/libs/v3.4.1-alpha.4.aar
index dfa8db7..8c6c29c 100644
Binary files a/OpenIM-SDK/libs/v3.3.1-rc.8.aar and b/OpenIM-SDK/libs/v3.4.1-alpha.4.aar differ
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/enums/ConversationType.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/enums/ConversationType.java
index 2d7c895..048d625 100644
--- a/OpenIM-SDK/src/main/java/io/openim/android/sdk/enums/ConversationType.java
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/enums/ConversationType.java
@@ -8,6 +8,7 @@ public class ConversationType {
      * 当前会话是单聊
      */
     public static final int SINGLE_CHAT = 1;
+    public static final int GROUP_CHAT = 2;
     /**
      * 当前会话是群聊
      */
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java
new file mode 100644
index 0000000..7b844f9
--- /dev/null
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java
@@ -0,0 +1,35 @@
+package io.openim.android.sdk.listener;
+
+import io.openim.android.sdk.models.CustomSignalingInfo;
+import io.openim.android.sdk.models.MeetingStreamEvent;
+import io.openim.android.sdk.models.RoomCallingInfo;
+import io.openim.android.sdk.models.SignalingInfo;
+
+public interface OnSignalingListener {
+
+    void onInvitationCancelled(SignalingInfo s);
+
+    void onInvitationTimeout(SignalingInfo s);
+
+    void onInviteeAccepted(SignalingInfo s);
+
+    void onInviteeAcceptedByOtherDevice(SignalingInfo s);
+
+    void onInviteeRejected(SignalingInfo s);
+
+    void onInviteeRejectedByOtherDevice(SignalingInfo s);
+
+    void onReceiveNewInvitation(SignalingInfo s);
+
+    void onHangup(SignalingInfo s);
+
+    void onRoomParticipantConnected(RoomCallingInfo s);
+
+    void onRoomParticipantDisconnected(RoomCallingInfo s);
+
+    void onMeetingStreamChanged(MeetingStreamEvent e);
+
+    void onReceiveCustomSignal(CustomSignalingInfo s);
+
+    void onStreamChange(String s);
+}
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java
new file mode 100644
index 0000000..f38a6fc
--- /dev/null
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java
@@ -0,0 +1,100 @@
+package io.openim.android.sdk.listener;
+
+
+import io.openim.android.sdk.models.CustomSignalingInfo;
+import io.openim.android.sdk.models.MeetingStreamEvent;
+import io.openim.android.sdk.models.RoomCallingInfo;
+import io.openim.android.sdk.models.SignalingInfo;
+import io.openim.android.sdk.utils.CommonUtil;
+import io.openim.android.sdk.utils.JsonUtil;
+
+final public class _SignalingListener implements open_im_sdk_callback.OnSignalingListener {
+    private final OnSignalingListener listener;
+
+    public _SignalingListener(OnSignalingListener listener) {
+        this.listener = listener;
+    }
+
+    @Override
+    public void onHangUp(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onHangup(info));
+        }
+    }
+
+    @Override
+    public void onInvitationCancelled(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInvitationCancelled(info));
+        }
+    }
+
+    @Override
+    public void onInvitationTimeout(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInvitationTimeout(info));
+        }
+    }
+
+    @Override
+    public void onInviteeAccepted(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInviteeAccepted(info));
+        }
+    }
+
+    @Override
+    public void onInviteeAcceptedByOtherDevice(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInviteeAcceptedByOtherDevice(info));
+        }
+    }
+
+    @Override
+    public void onInviteeRejected(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInviteeRejected(info));
+        }
+    }
+
+    @Override
+    public void onInviteeRejectedByOtherDevice(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onInviteeRejectedByOtherDevice(info));
+        }
+    }
+
+
+    @Override
+    public void onReceiveNewInvitation(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onReceiveNewInvitation(info));
+        }
+    }
+
+    @Override
+    public void onRoomParticipantConnected(String s) {
+        if (listener != null) {
+            RoomCallingInfo info = JsonUtil.toObj(s, RoomCallingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onRoomParticipantConnected(info));
+        }
+    }
+
+    @Override
+    public void onRoomParticipantDisconnected(String s) {
+        if (listener != null) {
+            RoomCallingInfo info = JsonUtil.toObj(s, RoomCallingInfo.class);
+            CommonUtil.runMainThread(() -> listener.onRoomParticipantDisconnected(info));
+        }
+    }
+
+
+}
diff --git a/settings.gradle b/settings.gradle
index 2827de0..bc9651d 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,4 +1,4 @@
 rootProject.name = "OpenIM-Android"
-//include ':app'
+include ':app'
 include ':OpenIM-SDK'
-//include ':pkglib'
+include ':pkglib'