Adding a .so file in Android Studio

Question

I am trying to add an external library, Scandit. I keep getting this error:

    java.lang.UnsatisfiedLinkError: Couldn't load scanditsdk-android-3.3.1 from loader dalvik.system.PathClassLoader[dexPath=/data/app/com.clover.barcode2-1.apk,libraryPath=/data/app-lib/com.clover.barcode2-1]: findLibrary returned null
    at java.lang.Runtime.loadLibrary(Runtime.java:365)
   .....

I assume it is because I am not properly including the .so file that comes with the library, but I can't figure out how to do it.

I am using Android Studio and I added the library by going to module settings -> libraries and added the directory with the jar and the directory with the so file.

I just added the directory it is in because I don't know how to add it. They are both located in /libs — Josh Wilson, May 23 '13 at 19:33
add a .so file from directory outside android project: https://stackoverflow.com/questions/50713933/add-so-prebuilt-library-from-another-directory-to-apk — user1506104, Jun 11 '18 at 12:19

Ajay S · Accepted Answer · 2014-03-18T18:34:39.313

79

You can add pre built *.so files in Android Studio using gradle 0.7.2+. First create the jniLibs at this location /app/src/main/ location and copy the all the folder with *.so files (armeabi, armeabi-v7a, mips, x86) in the jniLibs.

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edited Mar 18 '14 at 18:34

answered Mar 16 '14 at 18:16

Ajay S

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You saved my life bro, I'm trying to 2½ hours, worked perfectly, all the strange errors are gone, thank you for sharing your wisdom. @Josh Wilson You can mark as a solution? – Florida May 18 '15 at 01:05
1

@TGMCians can you please show us gradle piece of code which require for compile .so files. – Ganesh AB May 25 '15 at 07:06
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Thaaaaaaaaaaaaaaanks you helped a lot. – vrbsm Sep 18 '15 at 14:14
can you please guide me to add lib that is written in C in my android project. – John smith May 25 '16 at 05:56
What is Core class? Can't find it – Eli Elezra Aug 18 '16 at 11:54
Is there any doc for the place to put `so` files? – nn0p Aug 27 '16 at 05:23
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@TGMCians You are great.. :) – Ganesh AB Oct 22 '16 at 12:15
Is prebuilt .hpp file required for cmake. Its urgent please give me reply – Mounika May 28 '19 at 11:46
Highly appreciate that answer. Thank you. However, is it normal that people like me, coming from a C++ world, struggles so much at finding this answer ? There's almost no documentation that I could find on the native development for Android website. Is it poor documentation or am I just ignorant ? – Norman Pellet Jun 05 '20 at 14:32

score 9 · Answer 2 · answered Mar 04 '15 at 07:54

To use native-library (so files) You need to add some codes in the "build.gradle" file.

This code is for cleaing "armeabi" directory and copying 'so' files into "armeabi" while 'clean project'.

task copyJniLibs(type: Copy) {
    from 'libs/armeabi'
    into 'src/main/jniLibs/armeabi'
}
tasks.withType(JavaCompile) {
    compileTask -> compileTask.dependsOn(copyJniLibs)
}
clean.dependsOn 'cleanCopyJniLibs'

I've been referred from the below. https://gist.github.com/pocmo/6461138

dont forget to add armeabi-v7 and x86! – dy_ Jun 30 '15 at 11:33 — dy_, Jun 30 '15 at 11:33

score 6 · Answer 3 · answered May 09 '15 at 01:55

I had a libs folder in my project where i included external libraries added the line compile fileTree(dir: 'libs', include: '*.jar') into dependencies {} in the gradle's build file.

Then I made a lib folder and inside it an armeabi folder where I've inserted all the needed .so files. I then zipped the folder into a .zip (the structure inside the zip file is now lib/armeabi/*.so) I renamed the .zip file into armeabi.jar and added it to the libs folder as an external library.

score 1 · Answer 4 · edited May 23 '17 at 11:47

1

I think it's a problem of the new gradle build system. Try the solution of this answer. There is also a link to a google group discussion, that describes solution and the problems more detailed.

edited May 23 '17 at 11:47

Community

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answered Jun 24 '13 at 17:42

rivare

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score -1 · Answer 5 · answered Jul 07 '15 at 12:16

-1

splits {
    abi {
        enable true
        reset()
        include 'x86', 'x86_64', 'arm64-v8a', 'armeabi-v7a', 'armeabi'
        universalApk false
    }
}

I get this code from facebook fresco library

answered Jul 07 '15 at 12:16

xiaoyuan hu

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Isnt this code for splitting the apk into smaller parts as per dependent systems so that overall apk size gets reduced? – Jalpesh Jan 25 '17 at 07:17

Adding a .so file in Android Studio

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