java lang UnsatisfiedLinkError dalvik system PathClassLoader

Question

Is there someone who had experience with this error   java lang UnsatisfiedLinkError  dalvik system PathClassLoader DexPathList  zip file   data app org swig simple-2 base apk   nativeLibraryDirectories   vendor lib   system lib    couldn t find  liborg swig simple example so    Error occurs when I load library by this way    static       System loadLibrary  example        I m sure  example  class is exist in the current folder

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Simple Solution with Pics  Step1  Add following code in build gradle file under defaultConfig       ndk               abiFilters  armeabi-v7a    x86    armeabi    mips            Example    enter image description here  1   1    Steo 2  Add following code in gradle properties file  android useDeprecatedNdk true  Example     enter image description here  2   2   Step 3  Sync Gradle and Run the Project    Ambilpur      1   https   i stack imgur com IPw4y png    2   https   i stack imgur com ByMoh png

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This could be device related issue  I was getting this error in MI devices only  code was working with all other devices   This might help       defaultConfig                      externalNativeBuild                       cmake                           cppFlags  -frtti -fexceptions

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Ensure you have included the different abiFilters  this enables Gradle know what ABI libraries to package into your apk   defaultConfig    ndk           abiFilters  armeabi-v7a    x86    armeabi    mips                 If you storing your jni libs in a different directory  or also using externally linked jni libs  Include them on the different source sets of the app   sourceSets      main        jni srcDirs     src main jniLibs        jniLibs srcDir  src main jniLibs

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I am currently working on an Android application which streams radio  I use native decoder library which is called aacdecoder  Everything was fine till app gets crash error on some Android devices  It was really annoying  Because app was perfectly plays radio streams almost all devices but Samsung S6 and S6 Edge   Crash report says that  Fatal Exception  java lang UnsatisfiedLinkError  dalvik system PathClassLoader DexPathList  zip file     data app com radyoland android-1 base apk     nativeLibraryDirectories   data app com radyoland android-1 lib arm64   vendor lib64   system lib64    couldn   t find    libaacdecoder so     at java lang Runtime loadLibrary Runtime java 366   at java lang System loadLibrary System java 988   at com spoledge aacdecoder Decoder loadLibrary Decoder java 187    As you see that crash is saying that it could not load native library  But why  First of all I checked my structure  If native library  so files located correctly   Seems everything was okay except this crazy error  Then after some research  I find out that some of android devices has 64-bit processors  This devices generates and check arm64 folder to load native library  That was the problem  Because my project does not have arm64 folder  Here is the solution   defaultConfig                ndk           abiFilters  armeabi-v7a    x86    armeabi    mips             You need to add this filters abiFilters  to your app module   s build gradle files  So when your device try to run your app  it will check gradle file and understands that it should not generate any folder and use existing native library resources  Boom  almost solved  But still there is one more thing   android useDeprecatedNdk true   Add this line to your gradle properties to use deprecated Ndk   Finally my app works on S6 and S6 Edge  I mean it works on every devices which has new 64-bit processors   Update    As of Dec 2019 armabi and mips are deprecated  Supported ABIs are  arm64-v8a  armeabi-v7a  x86  x86 64   So  your code should be like this  defaultConfig                        ndk               abiFilters  arm64-v8a    armeabi-v7a    x86    x86 64

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I use Android Studio 3 0 and encounter this problem  And I m sure app s build gradle is OK   Go to Run -  Edit Configurations -  Profiling  and disable  Enable advanced profiling    This works for me  Reference answer

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Yet another crash cause and possible solution is described in this article  https   medium com keepsafe-engineering the-perils-of-loading-native-libraries-on-android-befa49dce2db  Briefly  in build gradle  dependencies       implementation  com getkeepsafe relinker relinker 1 2 3      in code  static       try           System loadLibrary   lt your libs name gt           catch  UnsatisfiedLinkError e            ReLinker loadLibrary context    lt your libs name gt

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-if gradle properties not available then first add that file and add  android useDeprecatedNdk true  -use this code in build gradle   defaultConfig       applicationId  com example application      minSdkVersion 16     targetSdkVersion 21     versionCode 11     versionName  1 1      ndk           abiFilters  armeabi

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If you use module with c   code and have the same issue you could try   Build - gt  Refresh Linked C   Projects  Also  you should open some file from this module and do  Build - gt  Make module  YourNativeLibModuleName

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What worked for me was to place the jniLibs folder under the  main  folder  just besides the  java  and  res  folders  for example project -  app -  src -  main -  jniLibs  I had all the libraries with the correct names and each one placed on their respective architecture subfolder  but I still had the same exception  even tried a lot of other SO answers like the accepted answer here  compiling a JAR with the  so libs  other placing of the jniLibs folder  etc   For this project  I had to use Gradle 2 2 and Android Plugin 1 1 0 on Android Studio 1 5 1

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Please note that there s a naming convention  Your lib needs to be called libexample so    LoadLibrary  example   will look for libexample so   The  so library needs to be inside the apk under the lib folder  since you are developing for Android  it needs to be under the lib armeabi and lib armeabi-v7a folders - why both folders   some versions of Android look under lib armeabi and some look under lib armeabi-v7a     se what works for you     Other things to look for     make sure you compile for the correct architecture  if you compile for armeabi v5 it won t work on armeabiv7 or armeabiv7s    make sure your exported prototypes are used in the correct class  check the hello jni example  Your exposed functions need to look something like Java mypackagename myjavabridgeclass myfunction     For example the function Java com example sample hello will translate in the java class com example sample   function hello

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In my case After running the ndk-build in the jni folder the shared library was created under the libs folder but the path specified in build gradle sourceSets main           jni srcDirs              jniLibs srcDir  src main jniLibs         so I need to move the created shared library to jnilibs folder and it worked

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This is worked for me  If your having  so file in armeabi then mention inside ndk that folder alone   defaultConfig           applicationId  com xxx yyy          minSdkVersion 17         targetSdkVersion 26         versionCode 1         versionName  1 0          renderscriptTargetApi 26         renderscriptSupportModeEnabled true         ndk               abiFilters  armeabi                    and then use this  android useDeprecatedNdk true    in gradle properties file

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For me the problem was in NDK ROOT not being set    Check your console if   NDK ROOT   None     NDK ROOT not defined  Please define NDK ROOT in your environment or in local properties  Check if you have set    NDK ROOT and SDK ROOT in C C  - Build- Environment  Android- NDK Android- SDK

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What helped me was to register the source directory for jni files in the build gradle file  Add this to your gradle file   android       sourceSets           main               jniLibs srcDir   YOUR JNI DIR      i e   libs

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Some old gradle tools cannot copy  so files into build folder by somehow  manually copying these files into build folder as below can solve the problem    build intermediates rs  build config   support architecture     build config  beta production sit uat   support architecture  armeabi armeabi-v7a mips x86

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This helped me  Sharing it for someone who might come up with same issue    android                defaultConfig                        ndk               abiFilters  armeabi    armeabi-v7a    x86    mips

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If you are using Android studio  just edit the gradle properties in the root folder and add android useDeprecatedNdk true  Then edit the build gradle file in your app s folder  set abiFilters as below   android        defaultConfig                ndk           abiFilters  armeabi    armeabi-v7a    x86    mips

[android] java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader

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