android 编译时copy so文件

因为项目只支持armeabi，而有些第三方库不支持armeabi，所以在编译时将v7、v8 so文件copy到armeabi。

直接上代码build.gradle中添加如下代码

afterEvaluate { project ->
    android.applicationVariants.each { variant ->
        opyV7Lib(variant, project)
    }
}

// 将armeabi-v7a xx.so 拷贝到 armeabi
def copyV7Lib(variant, project) {
    println("variant name=${variant.name}, buildType=${variant.buildType.name}")

    //取出变体名，将第一个字符变为大写，用于拼接task名称，例如debug->Debug，task名称 merge+Debug+NativeLibs
    def buildVariantName = variant.name.substring(0, 1).toUpperCase() + variant.name.substring(1)
    def taskName = "copyNativeLib" + buildVariantName
    println("taskName = ${taskName}, taskVariantName = ${buildVariantName}")

    def nativeLibDir = project.buildDir.getAbsolutePath() + "/intermediates/merged_native_libs/${variant.name}/out/lib"
    def armeabiV7Dir = nativeLibDir + "/armeabi-v7a"
    def armeabiDir = nativeLibDir + "/armeabi";

    println("armeabiV7Dir = ${armeabiV7Dir}")
    project.task(taskName) {
        doLast {
            println("copy from:" + armeabiV7Dir)
            println("copy into:" + armeabiDir)
            copy {
                from(armeabiV7Dir) {
                    //将v7 目录下的so copy到 armeabi
                    include("xx.so")
                }
                into armeabiDir
            }
        }
    }

    //gradle版本命令不同，5.6.x 版本测试有效
    def mergeLibsTask = "merge${buildVariantName}NativeLibs"
    project.tasks[taskName].dependsOn(project.tasks[mergeLibsTask])
    project.tasks["strip${buildVariantName}DebugSymbols"].dependsOn(taskName)
}