我试图实现来自这里的代码。
当尝试编译它时，我遇到了以下错误：
Error:(339) undefined reference to `ANativeWindow_fromSurface'
Error:(340) und
Error:(349) undefined reference to `ANativeWindow_setBuffersGeometry'
Error:(351) undefined reference to `ANativeWindow_lock'
Error:(353) undefined reference to `ANativeWindow_release'
Error:(406) undefined reference to `ANativeWindow_unlockAndPost'
Error:(407) undefined reference to `ANativeWindow_release'
Error:error: linker command failed with exit code 1 (use -v to see invocation)
Information:BUILD FAILED
Information:Total time: 2.012 secs
Information:8 errors
Information:0 warnings
Information:See complete output in console
ANativeWindow 来自于两个 C++ 的头文件，其中之一是
#include <android/native_window.h>
"以及其他"
#include <android/native_window_jni.h>
现在，我的CMake文件看起来像这样：
cmake_minimum_required(VERSION 3.4.1)
# OpenCV stuff
include_directories(D:\\opencv-3.2.0-android-sdk\\OpenCV-android-sdk\\sdk\\native\\jni\\include)
add_library( lib_opencv SHARED IMPORTED )
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)
add_compile_options(-std=c++11)
# 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 them 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).
src/main/cpp/native-lib.cpp)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries 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
-ljnigraphics
lib_opencv
# Links the target library to the log library
# included in the NDK.
${log-lib} )
关于我的C++代码的Gradle文件：
defaultConfig {
minSdkVersion globalConfiguration.getAt("androidMinSdkVersion")
targetSdkVersion globalConfiguration.getAt("androidTargetSdkVersion")
applicationId globalConfiguration.getAt("androidApplicationId")
versionCode globalConfiguration.getAt("androidVersionCode")
versionName globalConfiguration.getAt("androidVersionName")
testInstrumentationRunner globalConfiguration.getAt("testInstrumentationRunner")
testApplicationId globalConfiguration.getAt("testApplicationId")
externalNativeBuild {
cmake {
cppFlags "-frtti -fexceptions -Werror -fexceptions -std=c++11"
abiFilters 'x86', 'x86_64', 'armeabi', 'armeabi-v7a', 'arm64-v8a', 'mips', 'mips64'
}
}
multiDexEnabled = true
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
sourceSets {
main {
jniLibs.srcDirs = ['src/main/jniLibs']
}
}
希望有人能帮助我解决这个问题。
CMakeLists.txt文件中手动执行。https://dev59.com/YqHia4cB1Zd3GeqPTW4-#43886764 - ahasbini