项目中需要引入几个 so文件，但APP一直崩溃报错

java.lang.UnsatisfiedLinkError: Couldn’t load ad from loader dalvik.system.PathClassLoader…

修改 app 下的 build.gradle 文件，添加下方代码：

    // 将 .so 文件打包为 Native_Libs.jar 包文件

    task nativeLibsToJar(type: Zip, description: "create a jar archive of the native libs") {

        destinationDir file("$projectDir/libs")

        baseName "Native_Libs"

        extension "jar"

        from fileTree(dir: "libs", include: "**/*.so")

        into "lib"

    }

    tasks.withType(JavaCompile) {

        compileTask -> compileTask.dependsOn(nativeLibsToJar)

    }

    sourceSets.main{

        jniLibs.srcDirs = ['libs'];

    }

另外在 dependencies 中加入一行

compile files('libs/Native_Libs.jar') // 加载上方 .so 生成的该文件

至于这个包的名字 Native_Libs 是可以通过 baseName 自定义的

下面贴上完整的 build.gradle 文件：

apply plugin: 'com.android.application'

android {

    compileSdkVersion 23

    buildToolsVersion "23.0.3"

    defaultConfig {

        applicationId "com.xxx.xxx.xxx"

        minSdkVersion 15

        targetSdkVersion 23

        versionCode 2

        versionName "2.0.1"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

    // 将 .so 文件打包为 Native_Libs.jar 包文件

    task nativeLibsToJar(type: Zip, description: "create a jar archive of the native libs") {

        destinationDir file("$projectDir/libs")

        baseName "Native_Libs"

        extension "jar"

        from fileTree(dir: "libs", include: "**/*.so")

        into "lib"

    }

    tasks.withType(JavaCompile) {

        compileTask -> compileTask.dependsOn(nativeLibsToJar)

    }

    sourceSets.main{

        jniLibs.srcDirs = ['libs'];

    }

}

dependencies {

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

    testCompile 'junit:junit:4.12'

    compile 'com.android.support:appcompat-v7:23.4.0'

    compile 'com.android.support:design:23.4.0'

    compile 'com.joanzapata.iconify:android-iconify-fontawesome:2.2.1'

    compile 'com.joanzapata.iconify:android-iconify-ionicons:2.2.1'

    compile files('libs/Chance_Ad_SDK_Android_v5.3.5.jar')

    compile files('libs/Native_Libs.jar') // 加载上方 .so 生成的该文件

}