diff --git a/OpenIM-SDK/build.gradle b/OpenIM-SDK/build.gradle
index 55afaca..36dd17b 100644
--- a/OpenIM-SDK/build.gradle
+++ b/OpenIM-SDK/build.gradle
@@ -30,10 +30,9 @@ android {
 dependencies {
     implementation 'androidx.collection:collection:1.1.0'
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 
-    implementation 'io.openim:core-sdk:2.0.9.4@aar'
-    implementation 'com.alibaba:fastjson:1.1.72.android'
-//    implementation 'com.google.code.gson:gson:2.8.7'
+    implementation 'io.openim:core-sdk:2.0.9.6@aar'
+    implementation 'com.google.code.gson:gson:2.9.0'
 }
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/utils/JsonUtil.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/utils/JsonUtil.java
index 3b9c522..d0324e4 100644
--- a/OpenIM-SDK/src/main/java/io/openim/android/sdk/utils/JsonUtil.java
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/utils/JsonUtil.java
@@ -1,30 +1,119 @@
 package io.openim.android.sdk.utils;
 
-import com.alibaba.fastjson.JSONObject;
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParser;
+import com.google.gson.reflect.TypeToken;
 
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 public class JsonUtil {
-    public static String toString(Object o) {
-        return JSONObject.toJSONString(o);
+    //    public static String toString(Object o) {
+//        return JSONObject.toJSONString(o);
+//    }
+//
+//    public static <T> T toObj(String text, Class<T> clazz) {
+//        try {
+//            return JSONObject.parseObject(text, clazz);
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//        }
+//        return null;
+//    }
+//
+//    public static <T> List<T> toArray(String text, Class<T> clazz) {
+//        try {
+//            return JSONObject.parseArray(text, clazz);
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//        }
+//        return null;
+//    }
+    private static final Gson gson = new Gson();
+
+    /**
+     * 将object对象转成json字符串
+     */
+    public static String toString(Object object) {
+        String gsonString = null;
+        if (null != object) {
+            gsonString = gson.toJson(object);
+        }
+        return gsonString;
+    }
+
+
+    /**
+     * 将gsonString转成泛型bean
+     */
+    public static <T> T toObj(String gsonString, Class<T> cls) {
+        T t = null;
+        if (null != gsonString) {
+            t = gson.fromJson(gsonString, cls);
+        }
+        return t;
     }
 
-    public static <T> T toObj(String text, Class<T> clazz) {
-        try {
-            return JSONObject.parseObject(text, clazz);
-        } catch (Exception e) {
-            e.printStackTrace();
+
+    /**
+     * 转成list
+     * 泛型在编译期类型被擦除导致报错
+     * @param gsonString
+     * @param cls
+     * @return
+     */
+//    public static <T> List<T> GsonToList(String gsonString, Class<T> cls) {
+//        List<T> list = null;
+//        if (gson != null) {
+//            list = gson.fromJson(gsonString, new TypeToken<List<T>>() {
+//            }.getType());
+//        }
+//        return list;
+//    }
+
+    /**
+     * 转成list
+     * 解决泛型在编译期类型被擦除导致报错
+     */
+    public static <T> List<T> toArray(String json, Class<T> cls) {
+        List<T> list = null;
+        if (null != json) {
+            list = new ArrayList<T>();
+            JsonArray array = JsonParser.parseString(json).getAsJsonArray();
+            for (final JsonElement elem : array) {
+                list.add(gson.fromJson(elem, cls));
+            }
         }
-        return null;
+        return list;
     }
 
-    public static <T> List<T> toArray(String text, Class<T> clazz) {
-        try {
-            return JSONObject.parseArray(text, clazz);
-        } catch (Exception e) {
-            e.printStackTrace();
+
+    /**
+     * 转成list中有map的
+     */
+    public static <T> List<Map<String, T>> toListMaps(String gsonString) {
+        List<Map<String, T>> list = null;
+        if (null != gsonString) {
+            list = gson.fromJson(gsonString,
+                new TypeToken<List<Map<String, T>>>() {
+                }.getType());
         }
-        return null;
+        return list;
     }
 
+
+    /**
+     * 转成map的
+     */
+    public static <T> Map<String, T> toMaps(String gsonString) {
+        Map<String, T> map = null;
+        if (null != gsonString) {
+            map = gson.fromJson(gsonString, new TypeToken<Map<String, T>>() {
+            }.getType());
+        }
+        return map;
+    }
 }
diff --git a/app/build.gradle b/app/build.gradle
index 2ff0585..e01c98a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -32,12 +32,12 @@ android {
 
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.3.1'
-    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'com.google.android.material:material:1.4.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation 'androidx.navigation:navigation-fragment:2.3.5'
     implementation 'androidx.navigation:navigation-ui:2.3.5'
     implementation project(path: ':OpenIM-SDK')
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 }