【发布时间】：2019-07-09 15:33:41
【问题描述】：
我正在尝试在 Android 中实现 Alexa 语音服务 SDK。
我有预构建库，我在我的 Android 项目中使用。
我在src/main/jniLibs/armeabi-v7a/*.so 下有.so 文件
我可以成功编译和构建 x86 平台的 apk，但我的目标是在armeabi-v7a 设备上运行它。
但在生成 apk 时，我遇到了不兼容的目标错误。
完整的错误如下所示，
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':app:externalNativeBuildDebug'.
> Build command failed.
Error while executing process /home/ajinkya/Androidsdk/cmake/3.10.2.4988404/bin/cmake with arguments {--build /root/AndroidStudioProjects/alexaProtoApp/app/.externalNativeBuild/cmake/debug/armeabi-v7a --target native-lib}
[1/2] Building CXX object CMakeFiles/native-lib.dir/native-lib.cpp.o
[2/2] Linking CXX shared library /root/AndroidStudioProjects/alexaProtoApp/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libnative-lib.so
FAILED: /root/AndroidStudioProjects/alexaProtoApp/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libnative-lib.so
: && /home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++ --target=armv7-none-linux-androideabi24 --gcc-toolchain=/home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64 --sysroot=/home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -fno-addrsig -march=armv7-a -mthumb -Wa,--noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -static-libstdc++ -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--exclude-libs,libunwind.a -Wl,--no-undefined -Qunused-arguments -Wl,-z,noexecstack -shared -Wl,-soname,libnative-lib.so -o /root/AndroidStudioProjects/alexaProtoApp/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libnative-lib.so CMakeFiles/native-lib.dir/native-lib.cpp.o /root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/../../main/jniLibs/armeabi-v7a/libSampleApp.so /home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/arm-linux-androideabi/24/liblog.so /home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/arm-linux-androideabi/24/liblog.so -latomic -lm && :
/home/ajinkya/Androidsdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: /root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/../../main/jniLibs/armeabi-v7a/libSampleApp.so: incompatible target
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:25: error: undefined reference to 'my_initialize(_JavaVM*, _jobject*)'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:31: error: undefined reference to 'jni_wakeAlexa()'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:37: error: undefined reference to 'jni_wakeWithHoldAlexa()'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:43: error: undefined reference to 'jni_resetAlexa()'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:49: error: undefined reference to 'jni_reauthorizeAlexa()'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:55: error: undefined reference to 'jni_quitAlexa()'
/root/AndroidStudioProjects/alexaProtoApp/app/src/main/cpp/native-lib.cpp:61: error: undefined reference to 'jni_infoAlexa()'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
我的build.gradle 喜欢，
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
defaultConfig {
applicationId "my.project.vdi"
minSdkVersion 24
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
multiDexEnabled true
externalNativeBuild {
cmake {
cppFlags ""
// abiFilters "armeabi-v7a"
// arguments "-DANDROID_ARM_MODE=arm" , "-DANDROID_TOOLCHAIN=clang"
}
}
ndk {
// Specifies the ABI configurations of your native
// libraries Gradle should build and package with your APK. , x86 , armeabi-v7a
abiFilters "armeabi-v7a"
}
}
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"
}
}
sourceSets {
main {
jni.srcDirs = []
// let gradle pack the shared library into apk
jniLibs.srcDirs = ['src/main/jniLibs/']
}
}
// packagingOptions {
// exclude 'lib/arm64-v8a/libnative-lib.so'
// exclude 'lib/x86_64/libnative-lib.so'
// exclude 'lib/x86/libnative-lib.so'
// }
}
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:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
implementation 'com.squareup.picasso:picasso:2.5.2'
}
还有CMakeLists.txt
cmake_minimum_required(VERSION 3.4.1)
add_library( # Sets the name of the library.
native-lib
SHARED
native-lib.cpp)
add_library(SampleApp SHARED IMPORTED)
set_target_properties(SampleApp PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/../../main/jniLibs/${ANDROID_ABI}/libSampleApp.so)
find_library(
log-lib
log)
find_library(ANDROID_LOG_LIB log)
target_link_libraries(
native-lib
SampleApp
${ANDROID_LOG_LIB}
${log-lib} )
请指导我解决这个问题。
【问题讨论】：
标签： android cmake android-ndk java-native-interface native