diff --git a/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java b/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
index aea881b..1c1a05a 100644
--- a/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
+++ b/cim_for_mina/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
@@ -22,6 +22,8 @@
 package com.farsunset.cim.sdk.android;
 
 import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
 import android.app.Service;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -102,7 +104,13 @@ public class CIMPushService extends Service {
 	public int onStartCommand(Intent intent, int flags, int startId) {
 
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-			startForeground(this.hashCode(), new Notification.Builder(this, null).build());
+			NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
+			NotificationChannel channel = new NotificationChannel(getClass().getSimpleName(),getClass().getSimpleName(), NotificationManager.IMPORTANCE_LOW);
+			channel.enableLights(false);
+			channel.enableVibration(false);
+		    notificationManager.createNotificationChannel(channel);
+		    Notification notification = new Notification.Builder(this, channel.getId()).build();
+	        startForeground(this.hashCode(),notification);
 		}
 
 		intent = (intent == null ? new Intent(CIMPushManager.ACTION_ACTIVATE_PUSH_SERVICE) : intent);
diff --git a/cim_for_mina/cim-client-android/.idea/caches/build_file_checksums.ser b/cim_for_mina/cim-client-android/.idea/caches/build_file_checksums.ser
index faae9f8..a4cefff 100644
Binary files a/cim_for_mina/cim-client-android/.idea/caches/build_file_checksums.ser and b/cim_for_mina/cim-client-android/.idea/caches/build_file_checksums.ser differ
diff --git a/cim_for_mina/cim-client-android/.idea/caches/gradle_models.ser b/cim_for_mina/cim-client-android/.idea/caches/gradle_models.ser
index 85963de..f6ece0f 100644
Binary files a/cim_for_mina/cim-client-android/.idea/caches/gradle_models.ser and b/cim_for_mina/cim-client-android/.idea/caches/gradle_models.ser differ
diff --git a/cim_for_mina/cim-client-android/.idea/misc.xml b/cim_for_mina/cim-client-android/.idea/misc.xml
index 703e5d4..af0bbdd 100644
--- a/cim_for_mina/cim-client-android/.idea/misc.xml
+++ b/cim_for_mina/cim-client-android/.idea/misc.xml
@@ -5,7 +5,7 @@
       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/cim_for_mina/cim-client-android/app/build.gradle b/cim_for_mina/cim-client-android/app/build.gradle
index 488dea3..33d6139 100644
--- a/cim_for_mina/cim-client-android/app/build.gradle
+++ b/cim_for_mina/cim-client-android/app/build.gradle
@@ -6,7 +6,7 @@ android {
     defaultConfig {
         applicationId "com.farsunset.ichat.example"
         minSdkVersion 14
-        targetSdkVersion 26
+        targetSdkVersion 28
         versionCode 31
         versionName "3.1.0"
     }
diff --git a/cim_for_mina/cim-client-android/app/libs/cim-android-sdk-3.6.jar b/cim_for_mina/cim-client-android/app/libs/cim-android-sdk-3.6.jar
index 623a860..6486d6d 100644
Binary files a/cim_for_mina/cim-client-android/app/libs/cim-android-sdk-3.6.jar and b/cim_for_mina/cim-client-android/app/libs/cim-android-sdk-3.6.jar differ
diff --git a/cim_for_mina/cim-client-android/app/src/main/AndroidManifest.xml b/cim_for_mina/cim-client-android/app/src/main/AndroidManifest.xml
index e6347cb..5d3e85e 100644
--- a/cim_for_mina/cim-client-android/app/src/main/AndroidManifest.xml
+++ b/cim_for_mina/cim-client-android/app/src/main/AndroidManifest.xml
@@ -7,7 +7,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-    <uses-permission android:name="android.permission.GET_TASKS" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"
diff --git a/cim_for_netty/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java b/cim_for_netty/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
index 0804ee3..e98fcbb 100644
--- a/cim_for_netty/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
+++ b/cim_for_netty/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushService.java
@@ -22,6 +22,8 @@
 package com.farsunset.cim.sdk.android;
 
 import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
 import android.app.Service;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -103,7 +105,13 @@ public class CIMPushService extends Service {
 	public int onStartCommand(Intent intent, int flags, int startId) {
 
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-			startForeground(this.hashCode(), new Notification.Builder(this,null).build());
+	        NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
+			NotificationChannel channel = new NotificationChannel(getClass().getSimpleName(),getClass().getSimpleName(), NotificationManager.IMPORTANCE_LOW);
+			channel.enableLights(false);
+			channel.enableVibration(false);
+	        notificationManager.createNotificationChannel(channel);
+	        Notification notification = new Notification.Builder(this, channel.getId()).build();
+			startForeground(this.hashCode(),notification);
 		}
 		
 		intent = (intent == null ? new Intent(CIMPushManager.ACTION_ACTIVATE_PUSH_SERVICE) : intent);
diff --git a/cim_for_netty/cim-client-android/.idea/caches/build_file_checksums.ser b/cim_for_netty/cim-client-android/.idea/caches/build_file_checksums.ser
index b881f9f..0d4c701 100644
Binary files a/cim_for_netty/cim-client-android/.idea/caches/build_file_checksums.ser and b/cim_for_netty/cim-client-android/.idea/caches/build_file_checksums.ser differ
diff --git a/cim_for_netty/cim-client-android/.idea/caches/gradle_models.ser b/cim_for_netty/cim-client-android/.idea/caches/gradle_models.ser
index 8132672..2eff6b7 100644
Binary files a/cim_for_netty/cim-client-android/.idea/caches/gradle_models.ser and b/cim_for_netty/cim-client-android/.idea/caches/gradle_models.ser differ
diff --git a/cim_for_netty/cim-client-android/.idea/misc.xml b/cim_for_netty/cim-client-android/.idea/misc.xml
index 703e5d4..af0bbdd 100644
--- a/cim_for_netty/cim-client-android/.idea/misc.xml
+++ b/cim_for_netty/cim-client-android/.idea/misc.xml
@@ -5,7 +5,7 @@
       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/cim_for_netty/cim-client-android/app/build.gradle b/cim_for_netty/cim-client-android/app/build.gradle
index 6c426ea..c8800f2 100644
--- a/cim_for_netty/cim-client-android/app/build.gradle
+++ b/cim_for_netty/cim-client-android/app/build.gradle
@@ -7,7 +7,7 @@ android {
     defaultConfig {
         applicationId "com.farsunset.ichat.example"
         minSdkVersion 14
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 31
         versionName "3.1.0"
     }
diff --git a/cim_for_netty/cim-client-android/app/libs/cim-android-sdk-3.6.jar b/cim_for_netty/cim-client-android/app/libs/cim-android-sdk-3.6.jar
index 48b23e8..bd3329c 100644
Binary files a/cim_for_netty/cim-client-android/app/libs/cim-android-sdk-3.6.jar and b/cim_for_netty/cim-client-android/app/libs/cim-android-sdk-3.6.jar differ
diff --git a/cim_for_netty/cim-client-android/app/src/main/AndroidManifest.xml b/cim_for_netty/cim-client-android/app/src/main/AndroidManifest.xml
index e6347cb..5d3e85e 100644
--- a/cim_for_netty/cim-client-android/app/src/main/AndroidManifest.xml
+++ b/cim_for_netty/cim-client-android/app/src/main/AndroidManifest.xml
@@ -7,7 +7,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-    <uses-permission android:name="android.permission.GET_TASKS" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <application
         android:allowBackup="true"