加速Android Studio / Gradle构建

1. 开启gradle单独的守护进程

在下面的目录下面建立gradle.properties文件：

• /home/<username>/.gradle/ (Linux)
• /Users/<username>/.gradle/ (Mac)
• C:\Users\<username>\.gradle (Windows)

并在文件中增长：

org.gradle.daemon=true

同时修改项目下的gradle.properties文件也能够优化：

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Settings specified in this file will override any Gradle settings
# configured through the IDE.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html

# The Gradle daemon aims to improve the startup and execution time of Gradle.
# When set to true the Gradle daemon is to run the build.
# TODO: disable daemon on CI, since builds should be clean and reliable on servers
org.gradle.daemon=true

# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
# Default value: -Xmx10248m -XX:MaxPermSize=256m
org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
org.gradle.parallel=true

# Enables new incubating mode that makes Gradle selective when configuring projects. 
# Only relevant projects are configured which results in faster builds for large multi-projects.
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:configuration_on_demand
org.gradle.configureondemand=true

同时上面的这些参数也能够配置到前面的用户目录下的gradle.properties文件里，那样就不是针对一个项目生效，而是针对全部项目生效。

上面的配置文件主要就是作， 增大gradle运行的java虚拟机的大小，让gradle在编译的时候使用独立进程，让gradle能够平行的运行。

2. 修改android studio配置

在android studio的配置中，开启offline模式，以及修改配置。实际上的配置和上面的一大段同样，主要是在这个地方配置的只会在ide构建的时候生效，命令行构建不会生效。

File -> Settings -> Search Gradle -> Offline Work

File -> Settings -> Search Compiler -> Check all the check box

3. 引入依赖库时使用aar

使用网上第三方的依赖库时尽可能使用aar，能够在mavenhttp://gradleplease.appspot.com/或者githuhttps://github.com/Goddchen/mvn-repo搜索。

本身的库模块也能够打包成aar，关于这个能够参考stormzhang的文章http://www.stormzhang.com/android/2015/03/01/android-reference-local-aar/。