diff --git a/command/jar/VasDolly.jar b/command/jar/VasDolly.jar
index e71f2ab..2afba10 100644
Binary files a/command/jar/VasDolly.jar and b/command/jar/VasDolly.jar differ
diff --git a/command/src/main/java/com/tencent/vasdolly/command/Util.java b/command/src/main/java/com/tencent/vasdolly/command/Util.java
index d0205d5..483eff0 100644
--- a/command/src/main/java/com/tencent/vasdolly/command/Util.java
+++ b/command/src/main/java/com/tencent/vasdolly/command/Util.java
@@ -73,7 +73,7 @@ public static String getSignMode(File apkFile) {
      */
     public static String readChannel(File apkFile) {
         String channel = ChannelReader.getChannelByV2(apkFile);
-        if (channel == null) {
+        if (channel.isEmpty()) {
             channel = ChannelReader.getChannelByV1(apkFile);
         }
         return channel;
@@ -185,7 +185,7 @@ private static void generateV1ChannelApk(File baseApk, List<String> channelList,
         //判断基础包是否已经包含渠道信息
 
         String testChannel = ChannelReader.getChannelByV1(baseApk);
-        if (testChannel != null) {
+        if (!testChannel.isEmpty()) {
             System.out.println("baseApk : " + baseApk.getAbsolutePath() + " has a channel : " + testChannel + ", only ignore");
             return;
         }
diff --git a/helper/src/main/java/com/tencent/vasdolly/helper/ChannelReaderUtil.java b/helper/src/main/java/com/tencent/vasdolly/helper/ChannelReaderUtil.java
index 3216917..3e7846c 100644
--- a/helper/src/main/java/com/tencent/vasdolly/helper/ChannelReaderUtil.java
+++ b/helper/src/main/java/com/tencent/vasdolly/helper/ChannelReaderUtil.java
@@ -39,7 +39,7 @@ public class ChannelReaderUtil {
     public static String getChannel(Context context) {
         if (mChannelCache == null) {
             String channel = getChannelByV2(context);
-            if (channel == null) {
+            if (channel.isEmpty()) {
                 channel = getChannelByV1(context);
             }
             mChannelCache = channel;