任务 ":app:ndkBuild" 执行失败。>进程'Command'完成，退出值为非零 2

嗨，我目前正在关注YouTube上的一个教程，以使用Android Studio创建移动应用程序，不幸的是，我遇到了一些错误，无法自己解决。.cpp和.h文件的错误都是相同的。任何帮助将不胜感激，谢谢！：）

这是我的gradle构建中的错误：

Error:Execution failed for task ':app:ndkBuild'.
> Process 'command 'C:/Users/dell/AppData/Local/Android/sdk/ndk-bundle/ndk-
build.cmd'' finished with non-zero exit value 2

这是我的.h文件（Android Studio说" Jint"answers"缺少";"）：

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
#include <stdio.h>
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
/* Header for class com_example_dell_mpdetecthumans_OpencvNativeClass */
#ifndef _Included_com_example_dell_humandetectionndk_OpencvNativeClass
#define _Included_com_example_dell_humandetectionndk_OpencvNativeClass
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class:     com_example_dell_mpdetecthumans_OpencvNativeClass
* Method:    convertGray
* Signature: (JJ)I
*/
int toGray(Mat img, Mat& gray);
JNIEXPORT jint JNICALL 
Java_com_example_dell_humandetectionndk_OpencvNativeClass_convertGray
(JNIEnv *, jclass, jlong, jlong);
#ifdef __cplusplus
}
#endif
#endif

.cpp file（Android Studio说" Jint"answers"缺少";"）：

#include <com_example_dell_humandetectionndk_OpencvNativeClass.h>
JNIEXPORT jint JNICALL 
Java_com_example_dell_humandetectionndk_OpencvNativeClass_convertGray
(JNIEnv *, jclass, jlong addrRgba, jlong addrGray){
Mat& mRgb = *(Mat*)addrRgba;
Mat& mGray = *(Mat*)addrGray;
int conv;
jint retVal;
conv = toGray(mRgb, mGray);
retVal = (jint)conv;
return retVal;
}
int toGray(Mat img, Mat& gray){
cvtColor(img, gray, CV_RGBA2GRAY);
if(gray.rows==img.rows && gray.cols==img.cols)
    return 1;
    return 0;
}

android.mk：

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

#opencv
OPENCVROOT:= C:OpenCV-2.4.9-android-sdk
OPENCV_CAMERA_MODULES:=on
OPENCV_INSTALL_MODULES:=on
OPENCV_LIB_TYPE:=SHARED
include ${OPENCVROOT}/sdk/native/jni/OpenCV.mk
LOCAL_SRC_FILES := com_example_dell_humandetectionndk_OpencvNativeClass.cpp
LOCAL_LDLIBS += -llog
LOCAL_MODULE := MyOpencvLibs

include $(BUILD_SHARED_LIBRARY)

我的application.mk

APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi-v7a
APP_PLATFORM := android-16

我的应用程序build.gradle

sourceSets.main {
    jni.srcDirs = [] //disable automatic ndk-build call
}
task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
    commandLine "C:/Users/dell/AppData/Local/Android/sdk/ndk-bundle/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'
}
tasks.withType(JavaCompile) {
    compileTask -> compileTask.dependsOn ndkBuild
}

这是教程的链接，我正在关注：https：//www.youtube.com/watch?v=oq3oicfsgbo&t = 727S