From 7f3af2b2d98bbbe5b736d289102fa87ca03e4368 Mon Sep 17 00:00:00 2001
From: Siwei Xu <xusiwei1236@gmail.com>
Date: Sat, 24 Nov 2018 00:28:30 +0800
Subject: [PATCH] androidcamera: add a missing header.

fix #11699 Missing std header
---
 modules/androidcamera/src/camera_activity.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/androidcamera/src/camera_activity.cpp b/modules/androidcamera/src/camera_activity.cpp
index 84db3e1f33..7564b02a83 100644
--- a/modules/androidcamera/src/camera_activity.cpp
+++ b/modules/androidcamera/src/camera_activity.cpp
@@ -7,6 +7,7 @@
 #include <string>
 #include <vector>
 #include <algorithm>
+#include <functional>
 #include <opencv2/core/version.hpp>
 #include "camera_activity.hpp"
 #include "camera_wrapper.h"