对于API 23：
顶级build.gradle-/build.gradle
buildscript { ... dependencies { classpath 'com.android.tools.build:gradle:1.3.1' }}...特定于模块的build.gradle-/app/build.gradle
android { compileSdkVersion 23 buildToolsVersion "23.0.0" useLibrary 'org.apache.http.legacy' ...}官方文档（不过仅供预览）：http : //developer.android.com/about/versions/marshmallow/android-6.0-changes.html#behavior-apache-http-client
最新的Android Gradle插件变更日志：http ://tools.android.com/tech-docs/new-build-system
