specify .so files in build.gradle file android studio

问题

This is my Directory Structure

src -main

    -java

    -jniLibs

            -armeabi

                     -lib1.so
                     -lib2.so

Need to understand what piece of code should be written in build gradle file for these files to be included in the build. Right now, i am getting the error of not finding the .so file.

  java.lang.UnsatisfiedLinkError: nativeLibraryDirectories=[/vendor/lib, /system/lib]]] couldn't find "libFPEComponent.so"

Following solution by H.Brooks

I have got to add here

My Git repository:

My bUild.gradle file

 apply plugin: 'com.android.application'

android {
    productFlavors {
        arm {
            ndk {
                abiFilters "armeabi-v7a", "armeabi"
            }
        }

    }

    sourceSets
            {
                main
                        {

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

                        }

//Another code

            }

    compileSdkVersion 26
    buildToolsVersion '26.0.0'
    defaultConfig {
        applicationId "com.goambee.biometricziqitza"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

    }
    splits {

        // Configures multiple APKs based on ABI.
        abi {

            // Enables building multiple APKs per ABI.
            enable true

            // By default all ABIs are included, so use reset() and include to specify that we only
            // want APKs for x86, armeabi-v7a, and mips.

            // Resets the list of ABIs that Gradle should create APKs for to none.
            reset()

            // Specifies a list of ABIs that Gradle should create APKs for.
            include "armeabi-v7a"

            // Specifies that we do not want to also generate a universal APK that includes all ABIs.
            universalApk false
        }
    }
}

dependencies {

    compile fileTree(include: ['*.jar'], dir: 'libs')
//    compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')


    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:26.0.0-alpha1'
}

//task native-libstiveLibsToJar(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)
//        }

Here i have included source set block, i also had tested without that block. So still build isn't able to access .so files.

回答1:

If you want to use it you can call it in your class like this:

static {
    System.loadLibrary("libSONAME");
}

Add the following in your gradle:

jniLibs.srcDirs = ['libs']

Edit:

Adding .so Library in Android Studio

Create Folder "jniLibs" inside "src/main/"
Put all your .so libraries inside "src/main/jniLibs" folder
Folder structure looks like,
|--app:
|--|--src:
|--|--|--main
|--|--|--|--jniLibs
|--|--|--|--|--armeabi
|--|--|--|--|--|--.so Files
|--|--|--|--|--x86
|--|--|--|--|--|--.so Files
No extra code requires just sync your project and run your application.

Reference

https://github.com/commonsguy/sqlcipher-gradle/tree/master/src/main

Not sure what files you exactly have, if you only have .so?

Have a look at the image below:

This is a 'project/library' within my project and this is how the load the .so files get loaded/added:

I compile the project like this: