android studio 3.5.2 配置 opencv-4.5.2-android-sdk
丌官嘉良
测试C++使用 opencv处理CameraX 拍摄的照片,整了好几天,一步一个坑,记录一下最后成功的配置
第一步：把opencv-4.5.2-android-sdk OpenCV-android-sdk\sdk\native\jni 中的include文件夹放到 与CMakelists.txt 同级目录
第二步：把opencv-4.5.2-android-sdk OpenCV-android-sdk\sdk\native 中的libs 文件夹拷贝到项目的main目录下 并改名为jniLibs
第三步：修改 CMakeLists.txt
其实修改部分为：
target_link_libraries( # Specifies the target library.
native-lib
libopencv_java4 #这是新增的
# Links the target library to the log library
# included in the NDK.
${log-lib}
)
# 设置include文件夹的地址
include_directories(${CMAKE_SOURCE_DIR}/include)
# 设置opencv的动态库，注意这里需要把项目路径填写进去，尽量注意不要填写错误，
# 笔者在这里也遇到过路径错误导致找不到.so文件
add_library(libopencv_java4 SHARED IMPORTED)
set_target_properties(libopencv_java4 PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libopencv_java4.so)
#link_directories(${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI})
完整文件:
# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
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 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).
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 this
# build script, prebuilt third-party libraries, or system libraries.
#include_directories(${CMAKE_SOURCE_DIR}/../../opencv/include)
#link_directories(${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI})
target_link_libraries( # Specifies the target library.
native-lib
libopencv_java4
# Links the target library to the log library
# included in the NDK.
${log-lib}
)
################################################################Native
# 设置include文件夹的地址
include_directories(${CMAKE_SOURCE_DIR}/include)
# 设置opencv的动态库，注意这里需要把项目路径填写进去，尽量注意不要填写错误，
# 笔者在这里也遇到过路径错误导致找不到.so文件
add_library(libopencv_java4 SHARED IMPORTED)
set_target_properties(libopencv_java4 PROPERTIES IMPORTED_LOCATION
${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI}/libopencv_java4.so)
#link_directories(${CMAKE_SOURCE_DIR}/../jniLibs/${ANDROID_ABI})
第四步:修改build.gradle(Module:app)
我在网上找了很多配置,最后又一点儿点儿的测试 注释掉,最后只剩下了两处改动就可以正常运行:
arguments "-DANDROID_STL=c++_shared"
sourceSets{
main{
jniLibs.srcDirs=["/src/main/jniLibs"]
}
}
apply plugin: 'com.android.application'
android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "com.njm.myobj05"
minSdkVersion 21
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-std=c++11"
arguments "-DANDROID_STL=c++_shared"
}
}
// ndk {
// abiFilters 'x86', 'x86_64', 'armeabi-v7a', 'arm64-v8a'
// }
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
externalNativeBuild {
cmake {
path "src/main/cpp/CMakeLists.txt"
version "3.10.2"
//arguments "-DANDROID_STL=c++_shared"
}
}
/*
packagingOptions {
pickFirst 'lib/armeabi-v7a/libopencv_java4.so'
pickFirst 'lib/arm64-v8a/libopencv_java4.so'
pickFirst 'lib/x86_64/libopencv_java4.so'
pickFirst 'lib/x86/libopencv_java4.so'
}
*/
sourceSets{
main{
jniLibs.srcDirs=["/src/main/jniLibs"]
}
}
/*
splits {
abi {
enable true
reset()
include 'x86', 'x86_64', 'armeabi-v7a', 'arm64-v8a' //select ABIs to build APKs for
universalApk true //generate an additional APK that contains all the ABIs
}
}
// project.ext.versionCodes = ['armeabi': 1, 'armeabi-v7a': 2, 'arm64-v8a': 3, 'mips': 5, 'mips64': 6, 'x86': 8, 'x86_64': 9]
project.ext.versionCodes = ['armeabi': 1, 'armeabi-v7a': 2, 'arm64-v8a': 3, 'mips': 5, 'mips64': 6, 'x86': 8, 'x86_64': 9]
android.applicationVariants.all { variant ->
variant.outputs.each { output ->
output.versionCodeOverride =
project.ext.versionCodes.get(output.getFilter(com.android.build.OutputFile.ABI), 0) * 1000000 + android.defaultConfig.versionCode
}
}
*/
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
/* // CameraX core library
def camerax_version = '1.0.0-beta04'
implementation "androidx.camera:camera-core:$camerax_version"
// CameraX Camera2 extensions
implementation "androidx.camera:camera-camera2:$camerax_version"
// CameraX Lifecycle library
implementation "androidx.camera:camera-lifecycle:$camerax_version"
// CameraX View class
implementation 'androidx.camera:camera-view:1.0.0-alpha11'
*/
//def camerax_version = "1.1.0-alpha05"
def camerax_version = "1.1.0-alpha08"
// CameraX core library using camera2 implementation
implementation "androidx.camera:camera-camera2:$camerax_version"
// CameraX Lifecycle Library
implementation "androidx.camera:camera-lifecycle:$camerax_version"
// CameraX View class
implementation "androidx.camera:camera-view:1.0.0-alpha27"
}
// native opencv
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