NDK: how include *.so files in AndroidStudio

I have libs jar and *.so. I created Eclipse project as in tutorial (for this libs). I am now doing project in Android Studio, but system can't find *.so files. I make how in this - Include .so library in apk in android studio . My app does not find function in so libs. How to find them?
Log:

10-16 12:16:55.965: W/dalvikvm(4386): Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/atol/drivers/fptr/IFptrNative;
10-16 12:16:55.965: W/dalvikvm(4386): threadid=1: thread exiting with uncaught exception (group=0x41869438)
10-16 12:16:55.976: E/AndroidRuntime(4386): FATAL EXCEPTION: main
10-16 12:16:55.976: E/AndroidRuntime(4386): java.lang.ExceptionInInitializerError


An error occurs when creating an object using a JAR library. She in turn poked *.so files, but to find what she needs. Who is to blame and what to do?

4 Answers
4

Three options:

One

Copy yours *.SO libraries on your libs folder and put that on Build.gradle:

libs

Build.gradle

dependencies
{
compile fileTree(include: ['*.jar'], dir: 'libs')
}


Two

Make a new folder on src/main/jniLibs and write that on your Build.gradle:

src/main/jniLibs

Build.gradle

android {

//.................Another code

sourceSets
{
main
{

jniLibs.srcDirs = ['src/main/jnilibs']

}

//Another code

}//Android tag close


There

Make a new folder on src/main/jniLibs and write that on your Build.gradle:

src/main/jniLibs

Build.gradle

//Another code....

dependencies
{
compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')
}//end dependencies


task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {
destinationDir file("$buildDir/native-libs")
baseName 'native-libs'
from fileTree(dir: 'src/main/jnilibs', include: '**/*.so')
into 'lib/'
}

tasks.withType(JavaCompile)
{
compileTask -> compileTask.dependsOn(nativeLibsToJar)
}


Current Solution

Create the folder project/app/src/main/jniLibs, and then put your *.so files within their abi folders in that location. E.g.,

project/
├──libs/
| └── *.jar <-- if your library has jar files, they go here
├──src/
└── main/
├── AndroidManifest.xml
├── java/
└── jniLibs/
├── arm64-v8a/ <-- ARM 64bit
│ └── yourlib.so
├── armeabi-v7a/ <-- ARM 32bit
│ └── yourlib.so
└── x86/ <-- Intel 32bit
└── yourlib.so


Deprecated solution

Add both code snippets in your module gradle.build file as a dependency:

compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')
How to create this custom jar:

task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {
destinationDir file("$buildDir/native-libs")
baseName 'native-libs'
from fileTree(dir: 'libs', include: '**/*.so')
into 'lib/'
}

tasks.withType(JavaCompile) {
compileTask -> compileTask.dependsOn(nativeLibsToJar)
}


You need to put your .so files inside a folder named lib (it's not libs and should be lib). It should be in the same structure it should be in the APK file.

Structure

Project:
|--lib:
|--|--armeabi:
|--|--|--.so files.


Then an armeabi folder where insert all .so files. Then zip the folder into a .zip.Rename the .zip file into armeabi.jar and add the line
compile fileTree(dir: 'libs', include: '*.jar')
into dependencies {} in the gradle's build file.

.so

compile fileTree(dir: 'libs', include: '*.jar')

dependencies {}

For more info and alternate method please see This answer and This answer

Create folder name "jniLibs" inside src/main folder and add All the folders containing your "*.so" file and sync and run your application. No other steps required.

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