未找到 Android Studio 'opencv2/core/core.hpp' 文件

Question

我正在使用 Android Studio 2.3 并遇到致命错误：找不到“opencv2/core/core.hpp”文件

我看到很多类似的问题不是构建 Android.mk，但我的 Android.mk 应该已经构建了。

如果在Android.mk中更改OpenCV.mk的包含路径会报文件未找到错误，所以我认为Android.mk已经包含在构建过​​程中并且文件路径是正确的。

如果包含路径正确，OpenCV.mk 应该会找到文件夹 opencv2 但我仍然收到文件未找到错误。

还有其他方法可以在 Android Studio 中设置包含路径吗？

我的构建脚本有什么问题？

native-lib.cpp

#include <DetectionBasedTracker.h>
#include <opencv2/core/core.hpp>
#include <opencv2/contrib/detection_based_tracker.hpp>

Android.mk

LOCAL_PATH := $(call my-dir)

OPENCV_CAMERA_MODULES:=off
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=SHARED
include $(LOCAL_PATH)/../../../../../../../../OpenCV-android-sdk/sdk/native/jni/OpenCV.mk

LOCAL_C_INCLUDES+=$(LOCAL_PATH)/../../../../../../../../OpenCV-android-sdk/sdk/native/jni/include/
LOCAL_SRC_FILES := native-lib.cpp
LOCAL_LDLIBS +=  -llog -ldl
LOCAL_MODULE:= native-lib

include $(BUILD_SHARED_LIBRARY)

应用程序.mk

APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi armeabi-v7a arm64-v8a

build.gradle

android {
          ......
          ......

         sourceSets.main {
              jni.srcDirs = [] //disable automatic ndk-build call
         }

         task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
              commandLine 'F:\\Android_SDK\\ndk-bundle\\ndk-build.cmd',
              '-C', file('src\\main\\jni').absolutePath,
              'NDK_DEBUG=1',
              'V=1'
         }

         tasks.withType(JavaCompile) {
            compileTask -> compileTask.dependsOn ndkBuild
         }
}

文件结构如下

app/src/main/jni/Android.mk
app/src/main/jni/Application.mk
app/src/main/jni/native-lib.cpp
app/build.gradle

Answer 1

您是否将 OpenCV 库作为模块导入，您可以在 Android.mk 文件中尝试这样的操作

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

 #opencv

OPENCVROOT:= F:/Android/Libs/OpenCV
OPENCV_CAMERA_MODULES:=on
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=SHARED
include ${OPENCVROOT}/sdk/native/jni/OpenCV.mk

LOCAL_SRC_FILES := native-lib.cpp
LOCAL_LDLIBS += -llog
LOCAL_MODULE := MyOpenCVLibs
include $(BUILD_SHARED_LIBRARY)

在build.gradle命令行下可以这样添加，

commandLine "F:\\Android\\NDK\\android-ndk-r14\\build\\ndk-build.cmd",
                'NDK_PROJECT_PATH=build/intermediates/ndk',
                'NDK_LIBS_OUT=src/main/jniLibs',
                'APP_BUILD_SCRIPT=src/main/jni/Android.mk',
                'NDK_APPLICATION_MK=src/main/jni/Application.mk'