1.ndk动态库打包 2.多渠道编译

build.gradle

import java.util.regex.Pattern

apply plugin: 'android'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile project(':omusic-library')
}

task copyNativeLibs(type: Copy) {
    from fileTree(dir: 'libs', include: '**/*.so' )  into  'build/native-libs'
}

tasks.withType(Compile) {
    compileTask -> compileTask.dependsOn copyNativeLibs
    options.encoding = "UTF-8"
}

clean.dependsOn 'cleanCopyNativeLibs'

tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
    pkgTask.jniDir file('build/native-libs')
}


def buildOutputApkName() {
    def apkName = "OM_TV_" + android.defaultConfig.versionName + "_" + getChannel("AndroidManifest.xml");
    return apkName;
}

android {
    compileSdkVersion 16
    buildToolsVersion "17.0.0"

    defaultConfig {
        versionCode 3
        versionName "2.0.0"
        minSdkVersion 8
        targetSdkVersion 17
        project.archivesBaseName = buildOutputApkName();
    }

    signingConfigs {
        omusic {
            storeFile file("xx")
            storePassword "xx"
            keyAlias "xx"
            keyPassword "xx"
        }
    }

    buildTypes {
        release {
            runProguard true
            proguardFile 'proguard-project.txt'
            signingConfig signingConfigs.omusic
        }
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot('tests')

        // Move the build types to build-types/<type>
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/<type>/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

def getChannel(manifestLocation) {
    def manifestFile = file(manifestLocation)
    if (!manifestFile.exists()) {
        return -1
    }
    def pattern = Pattern.compile("android:value=\"(.*)\" android:name=\"UMENG_CHANNEL\"")
    def manifestText = manifestFile.getText()
    def matcher = pattern.matcher(manifestText)
    matcher.find()
    def channel = matcher.group(1)
    return channel;
}

请问一个问题：有关so库问题
错误日志：specified for property 'jniDir' does not exist（引起这个问题的原因是？）
我的部分build.gradle代码：

task copyNativeLibs(type: Copy) {
from(new File('libs')) { include 'armeabi/*.so' }
into new File(buildDir, 'native-libs')
}

tasks.withType(Compile) { compileTask -> compileTask.dependsOn copyNativeLibs }

clean.dependsOn 'cleanCopyNativeLibs'

tasks.withType(com.android.build.gradle.tasks.PackageApplication) { pkgTask ->
pkgTask.jniDir new File(buildDir, 'native-libs')
}

 我感觉 pkgTask.jniDir new File(buildDir, 'native-libs') 与 pkgTask.jniDir file(buildDir, 'native-libs')没有什么区别。

同样一份代码，在我的电脑A上so库没有问题，在另外一台打包电脑B上一直在报上面的错误日志。我对比了两台电脑的
gradlew -v是一致的。电脑A和电脑B都是win7（64）。java和android的环境变量我也统一配置好啦！
但是在电脑B上问题还是存在，纠结了一下午，尝试了各种方案，始终报错，麻烦您，介绍了这个报错日志的可能
原因。

昨天我提出上面的这个问题，最终解决了。方法比较笨，如果其他人也遇到同样的问题，希望能够来你这里。

我的解决方案：
1.理解build.gradle中自定义task的目的。对于so库，我理解的目的就是copy到\build\native-libs\中。至于gradle如何使用\build\native-libs我不是很了解。
2.了解目的后，那么我们就可以采用很多方案解决这个问题（如果build.gradle能够做到那就更好了）。不行的话，手动copy到\build\native-libs\就可以解决这个问题。也可以自己写个python脚本去copy。毕竟我们经常会gradle clean。