diff --git a/app/src/main/java/com/stand/standapp/MainActivity.kt b/app/src/main/java/com/stand/standapp/MainActivity.kt
index b2f27ea..b240ff9 100644
--- a/app/src/main/java/com/stand/standapp/MainActivity.kt
+++ b/app/src/main/java/com/stand/standapp/MainActivity.kt
@@ -31,10 +31,12 @@ class MainActivity : AppCompatActivity() {
         @Volatile
         private var pendingJsCode: String? = null
 
+        private val jsLock = Any()
+
         @JvmStatic
         fun executeJs(script: String) {
             Timber.tag("ExecuteJs").d(script)
-            synchronized(pendingJsCode ?: Any()) {
+            synchronized(jsLock) {
                 // 合并多次调用（用换行分隔）
                 pendingJsCode = if (pendingJsCode != null) "$pendingJsCode;$script" else script
             }
@@ -119,7 +121,7 @@ class MainActivity : AppCompatActivity() {
         // 获取并清除待执行的 JS 代码（由 bridge.js 轮询）
         @JvmStatic
         fun pollPendingJs(): String {
-            synchronized(pendingJsCode ?: Any()) {
+            synchronized(jsLock) {
                 val code = pendingJsCode ?: ""
                 pendingJsCode = null
                 return code