diff --git a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMConnectorManager.java b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMConnectorManager.java
index 8301349..79deda1 100644
--- a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMConnectorManager.java
+++ b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMConnectorManager.java
@@ -47,7 +47,6 @@ import com.farsunset.cim.sdk.android.model.SentBody;
 
 import android.content.Context;
 import android.content.Intent;
-import android.net.ConnectivityManager;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Process;
@@ -136,9 +135,7 @@ class CIMConnectorManager{
 
 	public void connect(final String host, final int port) {
 
-		boolean isNetworkConnected = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetwork() != null;
-
-		if (!isNetworkConnected) {
+		if (!CIMPushManager.isNetworkConnected(context)) {
 
 			Intent intent = new Intent();
 			intent.setPackage(context.getPackageName());
diff --git a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMEventBroadcastReceiver.java b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMEventBroadcastReceiver.java
index aebb1b1..427dbcd 100644
--- a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMEventBroadcastReceiver.java
+++ b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMEventBroadcastReceiver.java
@@ -30,7 +30,6 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.net.ConnectivityManager;
-import android.net.NetworkInfo;
 import android.os.Build;
 
 /**
@@ -61,9 +60,7 @@ public abstract class CIMEventBroadcastReceiver extends BroadcastReceiver {
 		if (intent.getAction().equals(CIMConstant.IntentAction.ACTION_NETWORK_CHANGED)
 				||intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
 			
-			ConnectivityManager connectivityManager = (ConnectivityManager) context
-					.getSystemService(Context.CONNECTIVITY_SERVICE);
-			onDevicesNetworkChanged(connectivityManager.getActiveNetworkInfo());
+			onDevicesNetworkChanged();
 		}
 
 		/*
@@ -133,9 +130,8 @@ public abstract class CIMEventBroadcastReceiver extends BroadcastReceiver {
 
 	private void onInnerConnectionClosed() {
 		CIMCacheManager.putBoolean(context, CIMCacheManager.KEY_CIM_CONNECTION_STATE, false);
-		boolean isNetworkConnected = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetwork() != null;
 
-		if (isNetworkConnected) {
+		if (CIMPushManager.isNetworkConnected(context)) {
 			CIMPushManager.connect(context, 0);
 		}
 
@@ -143,9 +139,8 @@ public abstract class CIMEventBroadcastReceiver extends BroadcastReceiver {
 	}
 
 	private void onConnectionFailed(long reinterval) {
-		boolean isNetworkConnected = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetwork() != null;
 
-		if (isNetworkConnected) {
+		if (CIMPushManager.isNetworkConnected(context)) {
 			onConnectionFailed();
 
 			CIMPushManager.connect(context, reinterval);
@@ -159,13 +154,13 @@ public abstract class CIMEventBroadcastReceiver extends BroadcastReceiver {
 		onConnectionSuccessed(autoBind);
 	}
 
-	private void onDevicesNetworkChanged(NetworkInfo info) {
+	private void onDevicesNetworkChanged() {
 
-		if (info != null) {
+		if (CIMPushManager.isNetworkConnected(context)) {
 			CIMPushManager.connect(context, 0);
 		}
 
-		onNetworkChanged(info);
+		onNetworkChanged();
 	}
 
 	private void onInnerMessageReceived(com.farsunset.cim.sdk.android.model.Message message, Intent intent) {
@@ -183,8 +178,8 @@ public abstract class CIMEventBroadcastReceiver extends BroadcastReceiver {
 
 	public abstract void onMessageReceived(com.farsunset.cim.sdk.android.model.Message message, Intent intent);
 
-	public void onNetworkChanged(NetworkInfo info) {
-		CIMListenerManager.notifyOnNetworkChanged(info);
+	public void onNetworkChanged() {
+		CIMListenerManager.notifyOnNetworkChanged(CIMPushManager.getNetworkInfo(context));
 	}
 
 	public void onConnectionSuccessed(boolean hasAutoBind) {
diff --git a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushManager.java b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushManager.java
index 65ff4e2..3296a1d 100644
--- a/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushManager.java
+++ b/cim-client-sdk/cim-android-sdk/src/com/farsunset/cim/sdk/android/CIMPushManager.java
@@ -27,6 +27,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.os.Build;
 import android.text.TextUtils;
 
@@ -241,7 +243,16 @@ public class CIMPushManager {
 	public static boolean isConnected(Context context) {
 		return CIMCacheManager.getBoolean(context, CIMCacheManager.KEY_CIM_CONNECTION_STATE);
 	}
+	
+	public static boolean isNetworkConnected(Context context) {
+		 NetworkInfo networkInfo =  getNetworkInfo(context);
+		 return networkInfo != null && networkInfo.isConnected();
+	}
 
+	public static NetworkInfo getNetworkInfo(Context context) {
+		 return ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();
+	}
+	
 	private static String getVersionName(Context context) {
 		String versionName = null;
 		try {
@@ -259,5 +270,7 @@ public class CIMPushManager {
         	context.startService(intent);
         }
 	}
+	
+	
 
 }
diff --git a/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-3.7.0.jar b/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-3.7.0.jar
index d3328ad..768d00e 100644
Binary files a/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-3.7.0.jar and b/cim-use-examples/cim-client-android/app/libs/cim-android-sdk-3.7.0.jar differ