diff --git a/cim-client-sdk/cim-android-sdk/cim-android-sdk.iml b/cim-client-sdk/cim-android-sdk/cim-android-sdk.iml
deleted file mode 100644
index 935519e..0000000
--- a/cim-client-sdk/cim-android-sdk/cim-android-sdk.iml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
-    <output url="file://$MODULE_DIR$/target/classes" />
-    <output-test url="file://$MODULE_DIR$/target/test-classes" />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
-      <excludeFolder url="file://$MODULE_DIR$/target" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: com.google.protobuf:protobuf-lite:3.0.1" level="project" />
-    <orderEntry type="module-library">
-      <library name="Maven: android:android:8.0.0">
-        <CLASSES>
-          <root url="jar://$MODULE_DIR$/libs/android.jar!/" />
-        </CLASSES>
-        <JAVADOC />
-        <SOURCES />
-      </library>
-    </orderEntry>
-  </component>
-</module>
\ No newline at end of file
diff --git a/cim-client-sdk/cim-android-sdk/pom.xml b/cim-client-sdk/cim-android-sdk/pom.xml
index 49b8bdf..ed38516 100755
--- a/cim-client-sdk/cim-android-sdk/pom.xml
+++ b/cim-client-sdk/cim-android-sdk/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.farsunset</groupId>
     <artifactId>cim-android-sdk</artifactId>
-    <version>4.0.0</version>
+    <version>4.1.0</version>
     <packaging>jar</packaging>
 
     <properties>
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMConnectorManager.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMConnectorManager.java
index 82b9714..e4149a1 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMConnectorManager.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMConnectorManager.java
@@ -24,12 +24,10 @@ package com.farsunset.cim.sdk.android;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Process;
-import com.farsunset.cim.sdk.android.logger.CIMLogger;
 import com.farsunset.cim.sdk.android.coder.ClientMessageDecoder;
 import com.farsunset.cim.sdk.android.coder.ClientMessageEncoder;
 import com.farsunset.cim.sdk.android.constant.CIMConstant;
+import com.farsunset.cim.sdk.android.logger.CIMLogger;
 import com.farsunset.cim.sdk.android.model.*;
 
 import java.io.IOException;
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushManager.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushManager.java
index 98ad286..e83fcf4 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushManager.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushManager.java
@@ -30,8 +30,8 @@ import android.net.NetworkInfo;
 import android.os.Build;
 import android.os.LocaleList;
 import android.text.TextUtils;
-import com.farsunset.cim.sdk.android.logger.CIMLogger;
 import com.farsunset.cim.sdk.android.constant.CIMConstant;
+import com.farsunset.cim.sdk.android.logger.CIMLogger;
 import com.farsunset.cim.sdk.android.model.SentBody;
 
 import java.util.Locale;
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushService.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushService.java
index 84bd801..8fea40a 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushService.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/CIMPushService.java
@@ -283,6 +283,7 @@ public class CIMPushService extends Service {
 
 
         Intent intent = new Intent(Intent.ACTION_MAIN);
+        intent.addFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
         intent.setPackage(getPackageName());
 
         Notification.Builder builder;
@@ -296,7 +297,7 @@ public class CIMPushService extends Service {
                 .setOngoing(false)
                 .setSmallIcon(icon)
                 .setWhen(System.currentTimeMillis())
-                .setContentIntent(PendingIntent.getActivity(this, 0, intent, 0))
+                .setContentIntent(PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_IMMUTABLE))
                 .setContentTitle(channelName)
                 .setContentText(message);
 
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/coder/ClientMessageDecoder.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/coder/ClientMessageDecoder.java
index ac9c0c7..feff18e 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/coder/ClientMessageDecoder.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/coder/ClientMessageDecoder.java
@@ -23,8 +23,8 @@ package com.farsunset.cim.sdk.android.coder;
 
 
 import com.farsunset.cim.sdk.android.constant.CIMConstant;
-import com.farsunset.cim.sdk.android.model.Ping;
 import com.farsunset.cim.sdk.android.model.Message;
+import com.farsunset.cim.sdk.android.model.Ping;
 import com.farsunset.cim.sdk.android.model.ReplyBody;
 import com.farsunset.cim.sdk.android.model.proto.MessageProto;
 import com.farsunset.cim.sdk.android.model.proto.ReplyBodyProto;
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/ReplyBody.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/ReplyBody.java
index ba8d3d4..eec204d 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/ReplyBody.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/ReplyBody.java
@@ -21,8 +21,6 @@
  */
 package com.farsunset.cim.sdk.android.model;
 
-import android.util.ArrayMap;
-
 import java.io.Serializable;
 import java.util.HashMap;
 import java.util.Map;
diff --git a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/SentBody.java b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/SentBody.java
index 7ee84ad..65d724c 100644
--- a/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/SentBody.java
+++ b/cim-client-sdk/cim-android-sdk/src/main/java/com/farsunset/cim/sdk/android/model/SentBody.java
@@ -21,7 +21,6 @@
  */
 package com.farsunset.cim.sdk.android.model;
 
-import android.util.ArrayMap;
 import com.farsunset.cim.sdk.android.constant.CIMConstant;
 import com.farsunset.cim.sdk.android.model.proto.SentBodyProto;
 
diff --git a/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.0.0.jar b/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.1.0.jar
similarity index 70%
rename from cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.0.0.jar
rename to cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.1.0.jar
index 1ef7e40..0a712b1 100644
Binary files a/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.0.0.jar and b/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-4.1.0.jar differ