应用程序在模拟器上运行良好，但在设备上崩溃：java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__ae

Posted 2023-03-12

【中文标题】应用程序在模拟器上运行良好，但在设备上崩溃：java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__aeabi_memcpy"

【英文标题】：App works fine on emulators, but crashes on device with: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__aeabi_memcpy"

【发布时间】：2019-05-29 13:00:44

【问题描述】：

我正在尝试使用 android Studio 3.2.1 将 yctung 的 AndroidLibSvm 实施到我的项目中。虽然该应用程序在任何模拟设备上都可以正常运行（我尝试了 Android 23 和 28，两者都完美运行），但它在我的真实设备（Android 6.0 的联想平板电脑）上崩溃并出现以下错误：

java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__aeabi_memcpy" referenced by "/data/app/com.krautkremer.nils.mymirror-2/lib/arm/libjnilibsvm.so"

只要应用程序尝试运行使用 cytung 库的部分代码。 SO上有一些类似的案例，例如here 或 here 但设置我的

arguments "-DANDROID_PLATFORM=android-23"

或任何其他 android-x 和我的 build.gradle 中的 targetSdkVersion 到 23 都没有解决它。

这是我的 build.gradle：

apply plugin: 'com.android.application'

android 
compileSdkVersion 28
defaultConfig 
    applicationId "com.krautkremer.nils.mymirror"
    minSdkVersion 23
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    externalNativeBuild 
        cmake 
            cppFlags ""
            arguments "-DANDROID_PLATFORM=android-23"
        
    

buildTypes 
    release 
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    

packagingOptions 
    //exclude 'META-INF/proguard/androidx-annotations.pro'


externalNativeBuild 
    cmake 
        path "CMakeLists.txt"


    



dependencies 
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'androidx.appcompat:appcompat:1.1.0-alpha01'
implementation 'androidx.media:media:1.1.0-alpha01'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
implementation 'com.google.android.material:material:1.1.0-alpha01'
implementation 'androidx.annotation:annotation:1.0.1'
implementation 'com.google.firebase:firebase-core:16.0.6'
implementation 'com.google.firebase:firebase-ml-vision:18.0.2'
implementation 'com.google.firebase:firebase-ml-common:16.1.6'
implementation 'com.google.firebase:firebase-ml-vision-face-model:17.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.1.1-alpha01'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1-alpha01'
implementation project(':androidlibsvm-release')

apply plugin: 'com.google.gms.google-services'

我什至将我的 NDK 版本从 18 降级到 15，但没有成功。 任何想法可能是什么问题？

帮帮我，欧比旺·克诺比。你是我唯一的希望。

编辑： 这是我的 CMakeLists.txt，如果有帮助的话。我没有改变任何东西，不是吗？

# 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).
        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 this
# 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)

【问题讨论】：

如果 LibSVM 崩溃，请确保您的输入选项遵循原始 LibSVM 格式

感谢您的回复。但是，即使应用程序在模拟设备上运行良好，输入格式/选项是否也有问题？

【参考方案1】：

尝试改变你的minSdkVersion和targetSdkVersion，即

minSdkVersion 15
targetSdkVersion 23

【讨论】：

感谢您的帮助！我尝试了一堆最小和目标 Sdkversion 的组合，但都没有奏效。

没必要。它在 API 级别 23 的 Android 6.0 上崩溃。上面显示的 minSdkVersion 应该没问题。