首先将so库放到libs下的对应目录下，如没有armeabi目录就创建下。
然后在工程里面的build.gradle中添加如下代码
task copyNativeLibs(type: Copy) {
from fileTree(dir: 'libs', include: 'armeabi/*.so') into 'build/lib'
}
tasks.withType(Compile) {
compileTask -> compileTask.dependsOn copyNativeLibs
}
clean.dependsOn 'cleanCopyNativeLibs'
tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
pkgTask.jniFolders = [new File(buildDir, 'lib')]
}