diff --git a/android/src/main/java/io/openim/flutter_openim_sdk/manager/MessageManager.java b/android/src/main/java/io/openim/flutter_openim_sdk/manager/MessageManager.java
index 42f2f0f..42b66fc 100644
--- a/android/src/main/java/io/openim/flutter_openim_sdk/manager/MessageManager.java
+++ b/android/src/main/java/io/openim/flutter_openim_sdk/manager/MessageManager.java
@@ -388,7 +388,7 @@ public class MessageManager extends BaseManager {
                         jsonValue(methodCall, "fileElem")));
     }
 
-    public void FetchSurroundingMessages(MethodCall methodCall, MethodChannel.Result result) {
+    public void fetchSurroundingMessages(MethodCall methodCall, MethodChannel.Result result) {
         Open_im_sdk.fetchSurroundingMessages(
                 new OnBaseListener(result, methodCall),
                 value(methodCall, "operationID"),