Android ANT 如何编译Jar 和 APK
最近在研究Android 的Ant 编译环境，遂将经验总结写下来。大家都知道我们可以在eclipse 里面编译android 的工程，这是怎么完成的呢？它主要是由于ADT 插件调用android的build tools完成的。其实eclipse 的编译也是通过Ant 脚本来完成编译的。/adnroid-sdk/tools/ant/build.xml 这就是ADT 插件调用的ant脚本，通过执行这个脚本就可以在完成android工程的编译。
那么如果不依赖ADT 插件，我们可以完成android 工程的编译呢？当然可以，首先必须安装Apache Ant，目前最新版本是1.9.4，下载解压放到android sdk 目录下，然后将其bin路径添加到环境变量PATH 。最后只需要在你的android 工程目录下编写build.xml 文件。
1. 如何编译Jar 文件，啥也不说了，直接上代码
下面为编译脚本build.sh 文件，最终会调用build.xml 文件。local.properties 文件是Ant 自动生成的，里面会自动指定 sdk.dir 变量，另外我们还手动指定了一个me.version,指定编译的版本号。
#!/bin/bash
PROP_FILE=local.properties
PROP_VERSION_KEY=me.version
VERSION=`cat ${PROP_FILE} | grep ${PROP_VERSION_KEY} | cut -d'=' -f2`
GITSHA1=`git log | sed -n '1p' | awk '{print $2}'`
MTL_OUTPUT=target
echo '
###################################################
#
# Android Build system
#
###################################################
'
#预设置android sdk目录
android update project -p .
#1.编译jni
ndk-build clean
ndk-build
#2.编译jar
ant -f build.xml
echo '
#################################################
#
# Make the tar package
#
#################################################
'
tar -cvf ${MTL_OUTPUT}/aliroot_${VERSION}_${GITSHA1}.tar.gz sdk
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must *NOT* be checked into Version Control Systems,
# as it contains information specific to your local configuration.
# location of the SDK. This is only used by Ant
# For customization when using a Version Control System, please read the
# header note.
sdk.dir=/Users/mars/development/AndroidSDK/sdk
me.version=1.1.0
Compiling .aidl into java files...
Compiling java source code...
Start proguard obfuscate...
-injar ${classes.obj.bin.dir}/${jarname}
-outjar ${output.dir}/${obfuscate.jarname}
-libraryjar ${android-jar}
-libraryjar ${libs.dir}/securityguard-2.3.39.jar
-libraryjar ${libs.dir}/umid-1.3.0.jar
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
#-dontwarn
-verbose
-optimizations !code/simplification/arithmetic,!class/merging/*
-keepattributes InnerClasses,Exceptions
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keepclasseswithmembernames class * {
native ;
}
-keepclasseswithmembers class * {
public (android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * {
public (android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
-keep interface com.xxx.zzz{public *;}
-keep class com.yyy.JNIHelper
-keepclassmembers class com.yyy.JNIHelper{public *;} 还需要在project.properties 文件中指定proguard.config. 下面是project.properties 文件：
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
# Project target.
target=android-19
android.library=false
proguard.config=proguard-project.txt2. 如何编译APK文件：build.sh，local.properties 文件都跟上面一样。只需要修改build.xml 文件：
Creating all output directories
Generating R.java / Manifest.java from the resources...
Compiling aidl files into Java classes...
Compiling java source code...
Converting compiled files and external libraries into ${outdir-bin}/${dex-file}...
Packaging resources and assets...
jarsigner ${out-unsigned-package} for release...
jarsigner for release succefully...