diff --git a/app/src/main/java/com/ouxuan/oxface/OXFaceOnlineActivity.java b/app/src/main/java/com/ouxuan/oxface/OXFaceOnlineActivity.java
index fbde5ef..0cce82d 100644
--- a/app/src/main/java/com/ouxuan/oxface/OXFaceOnlineActivity.java
+++ b/app/src/main/java/com/ouxuan/oxface/OXFaceOnlineActivity.java
@@ -791,6 +791,9 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
             gateABController = GateABController.getInstance();
             gateABController.initialize(this);
             
+            // 初始化门禁不可用弹窗
+            gateUnavailableDialog = new GateUnavailableDialog(this);
+            
             // 检查是否开启AB门检测
             checkGateCheckEnabled();
             
@@ -807,6 +810,12 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
                     public void onGateUnavailable(String reason) {
                         LogManager.logWarning(TAG, "触发门禁不可用弹窗（触发时机1）: " + reason);
                         
+                        // 检查门禁不可用弹窗是否已初始化
+                        if (gateUnavailableDialog == null) {
+                            LogManager.logError(TAG, "门禁不可用弹窗未初始化，无法显示");
+                            return;
+                        }
+                        
                         // 检查是否应该显示弹窗
                         boolean shouldShow = gateUnavailableDialog.checkShow(OXFaceOnlineActivity.this, isNetworkAvailable());
                         if (shouldShow) {
@@ -829,6 +838,14 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
                     public void onGateAvailable() {
                         LogManager.logInfo(TAG, "门禁恢复可用，隐藏弹窗并恢复摄像头预览");
                         
+                        // 检查门禁不可用弹窗是否已初始化
+                        if (gateUnavailableDialog == null) {
+                            LogManager.logWarning(TAG, "门禁不可用弹窗未初始化，无法隐藏");
+                            // 直接恢复摄像头预览
+                            resumeCamera();
+                            return;
+                        }
+                        
                         // 隐藏门禁不可用弹窗
                         if (gateUnavailableDialog != null && gateUnavailableDialog.isShowing()) {
                             gateUnavailableDialog.hide();
@@ -840,6 +857,11 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
                     
                     @Override
                     public void onGateStatusUpdate(boolean gateAOpen, boolean gateBOpen, boolean udpConnected) {
+                        // 检查门禁不可用弹窗是否已初始化
+                        if (gateUnavailableDialog == null) {
+                            return;
+                        }
+                        
                         // 实时更新弹窗中的门状态显示
                         if (gateUnavailableDialog != null && gateUnavailableDialog.isShowing()) {
                             LogManager.logInfo(TAG, "更新弹窗中的门状态显示: A门-" + 
@@ -865,9 +887,6 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
                 LogManager.logInfo(TAG, "AB门检测已关闭，跳过设置门状态监听器（触发时机1）");
             }
             
-            // 初始化门禁不可用弹窗
-            gateUnavailableDialog = new GateUnavailableDialog(this);
-            
             // 设置弹窗操作监听器
             gateUnavailableDialog.setDialogListener(new GateUnavailableDialog.GateUnavailableDialogListener() {
                 @Override
@@ -956,6 +975,12 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
      */
     private void showNewGateUnavailableDialog(String reason) {
         try {
+            // 检查门禁不可用弹窗是否已初始化
+            if (gateUnavailableDialog == null) {
+                LogManager.logError(TAG, "门禁不可用弹窗未初始化，无法显示: " + reason);
+                return;
+            }
+            
             // 执行checkShow()判断是否显示弹窗
             boolean shouldShow = gateUnavailableDialog.checkShow(OXFaceOnlineActivity.this, isNetworkAvailable());
             if (shouldShow) {
@@ -989,6 +1014,12 @@ public class OXFaceOnlineActivity extends BaseActivity implements View.OnClickLi
      */
     private void showNewPeopleCountDialog(boolean isLeaveScene, int peopleNum) {
         try {
+            // 检查门禁不可用弹窗是否已初始化
+            if (gateUnavailableDialog == null) {
+                LogManager.logError(TAG, "门禁不可用弹窗未初始化，无法显示人数异常弹窗");
+                return;
+            }
+            
             // 执行checkShow()判断是否显示弹窗
             boolean shouldShow = gateUnavailableDialog.checkShow(OXFaceOnlineActivity.this, isNetworkAvailable());
             if (shouldShow) {