diff --git a/app/src/main/java/com/nbee/echolink/utils/NetworkUtil.java b/app/src/main/java/com/nbee/echolink/utils/NetworkUtil.java
index 458f6fe..9f3a525 100644
--- a/app/src/main/java/com/nbee/echolink/utils/NetworkUtil.java
+++ b/app/src/main/java/com/nbee/echolink/utils/NetworkUtil.java
@@ -26,6 +26,8 @@ public class NetworkUtil {
     private Handler handler = new Handler();
     private static final int MAX_RETRIES = 3;
     private static final long RETRY_DELAY_MS = 2000; // 重试延迟，例如2秒
+    // OkHttpClient的单例
+    private static OkHttpClient client = new OkHttpClient();
 
     // API URL
     public NetworkUtil(Context context) {
@@ -35,10 +37,11 @@ public class NetworkUtil {
     }
 
     public <T> void postRequest(T dataObject) {
+        // 使用单例的OkHttpClient
         if (dataObject instanceof CallInfo) {
-            postRequestWithRetry(dataObject, 0,callApiUrl);
+            postRequestWithRetry(dataObject, 0, callApiUrl);
         } else if (dataObject instanceof SMSInfo) {
-            postRequestWithRetry(dataObject, 0,smsApiUrl);
+            postRequestWithRetry(dataObject, 0, smsApiUrl);
         }
     }