android 链接静态库,Android Studio 2.2链接opencv静态库
我想链接Android Studio 2.2中的opencv本机库。我发现的所有主题都是在Android Studio无法找到的build.gradle文件中使用Android.mk文件或其他方法。Android Studio 2.2链接opencv静态库
我正在使用Android Studio 2.2并通过使用C++支持创建一个新项目来创建该项目。
到目前为止，我成功地包括在C++源文件OpenCV的库：
#include
#include
#include "opencv.hpp"
extern "C"
jstring
Java_com_rvstudios_roomscanner_capp_MainActivity_stringFromJNI(
JNIEnv *env,
jobject /* this */) {
std::string hello = "Hello from C++";
cv::Mat image;
cv::cvtColor(image, image, CV_BGR2GRAY);
return env->NewStringUTF(hello.c_str());
}
当我尝试建立这个我得到了OpenCV函数未定义引用错误，是因为在静态库(。一个文件)必须被链接。从我已经读过的应该在build.gradle文件中完成。
这是迄今为止我的build.gradle文件：
apply plugin: 'com.android.application'
def targetPlatform = "mips"
android {
compileSdkVersion 23
buildToolsVersion "25.0.1"
defaultConfig {
applicationId "com.rvstudios.roomscanner.capp"
minSdkVersion 18
targetSdkVersion 23
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags ""
cppFlags.add("-isystem${project.rootDir}/app/src/main/cpp/vision".toString())
}
}
}
sourceSets.main {
jni.srcDirs = ["${project.rootDir}/app/src/main/jniLibs/${targetPlatform.toString()}/"]
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:design:23.4.0'
testCompile 'junit:junit:4.12'
}
我坚持在这里，因为我不知道如何来链接静态库。我已经看到了大量有关同样问题的SO主题，但是我阅读的所有内容都使用不同的项目设置，而且我对Android开发不熟悉，所以我根本就不了解它。
EDIT1： 我的CMakeLists.txt：
# Sets the minimum version of CMake required to build the native
# library. You should either keep the default value or only pass a
# value of 3.4.0 or lower.
cmake_minimum_required(VERSION 3.4.1)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds it for you.
# Gradle automatically packages shared libraries with your APK.
add_library(# Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
# Associated headers in the same location as their source
# file are automatically included.
src/main/cpp/native-lib.cpp
src/main/cpp/vision/opencv.hpp)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because system libraries are included in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library(# Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in the
# build script, prebuilt third-party libraries, or system libraries.
target_link_libraries(# Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib}
)
+0
你加 'opencv.hpp' 作为一个库的CMakeLists.txt？ –
+0
是的，我做到了！我将我的CMakeLists.txt添加到问题领域！ –
+0
尝试包含'opencv.hpp'文件，如下所示; #include“vision/opencv.hpp” –