Native libraries (*.so) files missing in the aar file(if dependent library is a shared library)

Question

I am Using Android Studio 1.5.1 Gradle version 2.8. Gradle experimental plugin v0.4.0 I have a library with native C code and java code as well. I am generating a library CoreLib-fat-release.aar with native libraries for all architectures(libcore.so) - arm64-v8a, armeabi, armeabi-v7a, mips, mips64, x86, x86-64. I have a second library depending on my Core library. I made Core library as shared library.

In second library gradle file:

jni {
            dependencies {
                project ":CoreLib" buildType "release" productFlavor "fat" linkage "shared"
            }
    }

It is able to build properly, but when I open and see the second library aar file, I dont see libcore.so in all architecture folders.

Eg: SecondLibrary-fat-release.aar => SecondLibrary-fat-release-zip Inside SecondLibrary-fat-release/jni folder, only x86 and x86_64 folder contains libcore.so file. Other folders (arm64-v8a, armeabi, armeabi-v7a, mips, mips64) doesnot contain libcore.so file.

Because of this reason, if I use my Second Library in a 64 bit device, it is complaining UnSatisfiedLink error saying Found 32-bit library instead of 64-bit.

HEre is my build.gradle of second library:

apply plugin: 'com.android.model.library'
model {
android {
    compileSdkVersion = 21
    buildToolsVersion = "23.0.2"
    defaultConfig.with {
        minSdkVersion.apiLevel = 21
        targetSdkVersion.apiLevel = 21
        testInstrumentationRunner = "android.test.InstrumentationTestRunner"
    }
    lintOptions.with {
        abortOnError = false
    }
}
android.ndk {
    moduleName = "secondlibrary
    cppFlags.addAll("-I${file(folder_path)}".toString(),
            "-I${file(sourcesDir +folder1)}".toString(),
            "-I${file(sourcesDir +folder2)}".toString(),
    )
    cppFlags.add("-frtti")
    cppFlags.add("-fexceptions")
    CFlags.addAll("-I${file(folder_path)}".toString(),
            "-I${file(sourcesDir +folder1)}".toString(),
            "-I${file(sourcesDir +folder2)}".toString(),
    )
    CFlags.add("-O3")
    CFlags.add("-funroll-loops")
    CFlags.add("-Wall")
    ldLibs.addAll(["android", "log", "stdc++", "c", "m", "z", "EGL", "GLESv2"])
    stl = "gnustl_shared"
}
// jni is the default dir; config this if yours is in different directory
android.sources {
    androidTest {
        java {
            source {
                srcDirs '../test_sources_path/src'
            }
        }
    }
    main {
        manifest {
            source {
                srcDirs '.'
            }
        }
        java {
            source {
                srcDir "src"
            }
        }
        jni {
            dependencies {
                project ":CoreLib" buildType "release" productFlavor "fat" linkage "shared"
            }
            source {
                srcDirs = ["jni",
                           path1,
                           path2,
                           "libcore.so"]
            }
        }
        jniLibs {
            dependencies {
                library file(path_to_binaries + "libcore.so") abi "armeabi"
                library file(path_to_binaries + "libcore.so") abi "x86"
                library file(path_to_binaries + "libcore.so") abi "armeabi-v7a"
                library file(path_to_binaries + "libcore.so") abi "mips"
                library file(path_to_binaries + "libcore.so") abi "x86_64"
                library file(path_to_binaries + "libcore.so") abi "arm64-v8a"
                library file(path_to_binaries + "libcore.so") abi "mips64"
            }
        }
    }
}
android.productFlavors {
    create("fat")
}
repositories {
    libs(PrebuiltLibraries) {
        CoreLib {
            binaries.withType(SharedLibraryBinary) {
                sharedLibraryFile = file(path_to_binaries + "${targetPlatform.getName()}/libcore.so")
            }
        }
    }
}
 }
 dependencies {
     compile project(':CoreLib-fat-release')
 }

NOTE: If I make CoreLib linkage as 'static' instead of 'shared', then all libcore.so files are copied properly to all the folders.

Please let me know if this is a programming issue or a bug in experimental plugin. Please suggest me if you know any alternative? Thank you.

Planning to use 0.6.0 experimental plugin, as they clearly mentioned about the improvement in native library dependency resolution. Will update this post based on my findings. http://tools.android.com/tech-docs/new-build-system/gradle-experimental **0.6.0-alpha3 DSL for specifying prebuilt libraries dependency has been changed. Updated to Gradle 2.8. Fixed various issues with native library dependency resolution.** — Chandra Lakkimsetty, May 21 '16 at 18:25

score 0 · Answer 1 · answered May 31 '16 at 09:17

This problem got resolved by the doing the following:

I have changed the experimental plugin version from 0.4.0 to 0.7.0 (gradle version 2.10).

Changes required in build.gradle:

We need to define variables outside model element.

we can remove

jniLibs {
        dependencies {
             library file(path_to_binaries + "libcore.so") abi "armeabi"
             library file(path_to_binaries + "libcore.so") abi "x86"
             library file(path_to_binaries + "libcore.so") abi "armeabi-v7a"
             library file(path_to_binaries + "libcore.so") abi "mips"
             library file(path_to_binaries + "libcore.so") abi "x86_64"
             library file(path_to_binaries + "libcore.so") abi "arm64-v8a"
             library file(path_to_binaries + "libcore.so") abi "mips64"
        }
}

As this block of code is sufficient:

repositories {
libs(PrebuiltLibraries) {
    CoreLib {
        binaries.withType(SharedLibraryBinary) {
            sharedLibraryFile = file(path_to_binaries + "${targetPlatform.getName()}/libcore.so")
        }
    }
}

Native libraries (*.so) files missing in the aar file(if dependent library is a shared library)

1 Answers1