我正在尝试在Android设备上原生使用C++构建Tensorflow lite。我为每种体系结构构建了一个.so tensorflow 文件,并将其放置在jniLibs文件夹中。这是我的Cmake文件:
set(pathToProject /ih/user/project/NativeTfLite/app)
set(libs ${pathToProject}/src/main/jniLibs)
add_library(libtensorflowLite SHARED IMPORTED
)
set_target_properties(libtensorflowLite PROPERTIES IMPORTED_LOCATION
${libs}/${ANDROID_ABI}/libtensorflowLite.so)
find_library(
log-lib
log )
add_library(
native-lib
SHARED
native-lib.cpp)
target_include_directories(native-lib PRIVATE
${lib}/include)
target_link_libraries( # Specifies the target library.
native-lib. #Problem is here when linking native-lib with libtensorflowlite
libtensorflowLite
${log-lib} )
在编译期间,将找到这些文件。但是,在target_link_libraries行中,两个库libtensorflowlite和native-lib的链接存在运行时崩溃,并出现以下错误:
java.lang.UnsatisfiedLinkError:dlopen失败:未找到库“/Users/ih/project/cameraFrames/NativeTfLite/app/src/main/jniLibs/arm64-v8a/libtensorflowLite.so”
此外,.SO文件未链接到APK。
这是我的build.gradle文件:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
compileSdkVersion 29
buildToolsVersion "29.0.3"
defaultConfig {
applicationId "com.proj.nativetflite"
minSdkVersion 24
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
sourceSets {
main {
jniLibs.srcDir 'src/main/jniLibs'
jniLibs.srcDirs = ["src/main/jniLibs"]
}
}
externalNativeBuild {
cmake {
cppFlags "-std=c++11"
arguments '-DCMAKE_VERBOSE_MAKEFILE=ON'
}
}
ndk {
abiFilters "armeabi-v7a", "x86" , "arm64-v8a"
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "src/main/cpp/CMakeLists.txt"
version "3.10.2"
}
}
}
dependencies {
implementation fileTree(dir: 'jniLibs', include: '**/*.so')
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.core:core-ktx:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}
是什么原因造成的?
最佳答案
在AGP 4.0之前,您需要使用jniLibs
:https://developer.android.com/studio/projects/gradle-external-native-builds#jniLibs显式打包预构建的库。请注意,文档说您不需要对CMake声明的任何内容执行此操作,但是我敢肯定,这里的文档是错误的(我已经联系文档所有者以查看是否需要修复此问题,因为它适用于4.0)。
在4.0中应该没有必要,但是还没有达到稳定。