嗨,大家好我目前正在Youtube上使用Android工作室創建一個移動應用程序的教程,不幸的是我遇到了一些錯誤,並不能自己解決它。 .cpp和.h文件的錯誤都是相同的。任何幫助將不勝感激,提前致謝! :)任務「:app:ndkBuild」的執行失敗。 >過程'命令'完成非零退出值2
這是我gradle這個編譯錯誤:
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
這是我的.h文件(Android的工作室說,有對「jint」和缺少一個錯字錯誤「;」):
/* 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文件(Android的工作室說,有對 「jint」 和缺少一個錯字錯誤 「;」):
#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application.mk
APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := armeabi-v7a
APP_PLATFORM := android-16
我的應用程序的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
}
這是我下面的教程鏈接:https://www.youtube.com/watch?v=Oq3oiCfSgbo&t=727s
最新的Android Studio和Android Gradle Plugins支持NDK-Build和CMake。目前沒有必要爲此創建gradle任務。請看看這個[回答](https://stackoverflow.com/questions/44174164/execution-failed-for-appndkbuild-process-command-ndk-build-cmd-finished-w?rq=1)和[Android指南](https://developer.android.com/studio/projects/add-native-code.html) – Sheikh
指向文本文件鏈接的文本截圖鏈接?只需在問題中發佈錯誤文本。如果它太大,請使用gist/pastebin。 –
@Sheikh什麼是gradle任務?這是否意味着我的應用程序build.gradle上面的代碼塊? –