ant 加快eclipse下android项目编译速度
本文主要介绍通过ant和一些eclipse配置加快eclipse下android项目编译速度。
主要包括两部分ant提高效率、eclipse配置项提高效率。关于eclipse中android项目的编译过程分析见上一篇博客。
Ps:本文中编译过程输出都是以真机(htc g7)作为avd,api level为8。
用eclipse进行android开发的朋友都会发现,无论是java文件还是一个资源文件的修改,在build的时候都会有一个重新编译的过程,而这个过程及其缓慢,导致项目开发效率极其低下。
1、ant配置提高效率
这个部分主要介绍ant可以为android开发做什么,如何生成ant项目,为已存在的项目生成ant的build xml,如何利用ant生成配置。
相应java开发对ant都有一定熟悉,关于下载安装、配置及使用不多介绍,具体可见apache ant
1.1 ant可以为android开发做什么
a. 添加自定义生成步骤
b. 使用自动生成系统
c. 使用生成配置
d. 一个命令build项目
1.2 生成ant项目
使用如下命令
android create project --name YourProjectName --path C:\dev\YourProject --target android-3 --package com.company.testproject --activity MainActivity
相当于eclipse -> new -> other -> android project,参数相当于dialog中需要填写的信息
1.3 为已存在的项目生成ant的build xml
运行命令行到当前项目根目录下,运行如下命令:
android update project --path .
结果如下:
Updated local.properties Added file C:\dev\blog\antbuild\build.xml
表示增加成功,可以使用ant命令查看相关信息和帮助,如下:
>ant Buildfile: C:\dev\blog\antbuild\build.xml [setup] Android SDK Tools Revision 6 [setup] Project Target: Android 1.5 [setup] API level: 3 [setup] WARNING: No minSdkVersion value set. Application will install on all Android versions. [setup] Importing rules file: platforms\android-3\ant\ant_rules_r2.xml help: [echo] Android Ant Build. Available targets: [echo] help: Displays this help. [echo] clean: Removes output files created by other targets. [echo] compile: Compiles project's .java files into .class files. [echo] debug: Builds the application and signs it with a debug key. [echo] release: Builds the application. The generated apk file must be [echo] signed before it is published. [echo] install: Installs/reinstalls the debug package onto a running [echo] emulator or device. [echo] If the application was previously installed, the [echo] signatures must match. [echo] uninstall: Uninstalls the application from a running emulator or [echo] device. BUILD SUCCESSFUL
1.4 如何利用ant生成配置
项目中经常需要对一些字符串或是日志级别进行设置,这里我们可以通过ant的配置项完成
新建build.properties文件,内容为
# Turn on or off logging. config.logging=true
调用地方如下使用
public class Config { /** Whether or not to include logging statements in the application. */ public final static boolean LOGGING = @CONFIG.LOGGING@; }
需要在build.xml中添加如下部分
<!-- Copy Config.java to our source tree, replacing custom tokens with values in build.properties. The configuration depends on "clean" because otherwise the build system will not detect changes in the configuration. --> <target name="config"> <property name="config-target-path" value="${source.dir}/com/androidengineer/antbuild"/> <!-- Copy the configuration file, replacing tokens in the file. --> <copy file="config/Config.java" todir="${config-target-path}" overwrite="true" encoding="utf-8"> <filterset> <filter token="CONFIG.LOGGING" value="${config.logging}"/> </filterset> </copy> <!-- Now set it to read-only, as we don't want people accidentally editing the wrong one. NOTE: This step is unnecessary, but I do it so the developers remember that this is not the original file. --> <chmod file="${config-target-path}/Config.java" perm="-w"/> <attrib file="${config-target-path}/Config.java" readonly="true"/> </target>具体可以参考 http://www.androidengineer.com/2010/06/using-ant-to-automate-building-android.html
2、eclipse配置项提高效率
右击项目选择Properties -> Builders,取消勾选所有的Builders
原因尚不明,但很有效果,修改文件后保存,编译极快。
3、修改sdk依赖版本,据悉在api level 8之前编译速度良好。
未降级api进行测试
参考: