From cdb68da3362b98da24d4a9afffb243b7f795649d Mon Sep 17 00:00:00 2001
From: hrxiang <xianghairui@126.com>
Date: Fri, 9 Jul 2021 17:23:20 +0800
Subject: [PATCH] fix bug

---
 .../java/io/openim/flutter_openim_sdk/util/JsonUtil.java   | 7 +++++++
 lib/src/manager/im_group_manager.dart                      | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/android/src/main/java/io/openim/flutter_openim_sdk/util/JsonUtil.java b/android/src/main/java/io/openim/flutter_openim_sdk/util/JsonUtil.java
index 853220d..0c8af16 100644
--- a/android/src/main/java/io/openim/flutter_openim_sdk/util/JsonUtil.java
+++ b/android/src/main/java/io/openim/flutter_openim_sdk/util/JsonUtil.java
@@ -4,6 +4,13 @@ import org.json.JSONObject;
 
 public class JsonUtil {
     public static String toString(Object o) {
+        if (o instanceof String) {
+            StringBuffer buffer = new StringBuffer();
+            buffer.append("\"");
+            buffer.append(o);
+            buffer.append("\"");
+            return buffer.toString();
+        }
         Object obj = JSONObject.wrap(o);
         if (null != obj) {
             return obj.toString();
diff --git a/lib/src/manager/im_group_manager.dart b/lib/src/manager/im_group_manager.dart
index 5496e86..34c3824 100644
--- a/lib/src/manager/im_group_manager.dart
+++ b/lib/src/manager/im_group_manager.dart
@@ -126,7 +126,7 @@ class GroupManager {
     return _channel
         .invokeMethod('getGroupsInfo', _buildParam({'gidList': gidList}))
         .then((value) {
-      List list = _formatJson(value) ?? [];
+      List list = _formatJson(value);
       return list.map((e) => GroupInfo.fromJson(e)).toList();
     });
   }