1.安装jdk@H_404_3@

BUILD Failed /home/bilal/tmp/ant/build.xml:19: Unable to find a javac compiler; com.sun.tools.javac.Main is not on the classpath. Perhaps JAVA_HOME does not point to the JDK. It is currently set to "/usr/lib/jvm/java-6-openjdk/jre"@H_404_3@

增加一个JAVA_HOME的环境变量，指向jdk的路径C:\Program Files\Java\jdk1.8.0_05 （这里必须是jdk的路径，不能是jre的路径）@H_404_3@

@H_404_3@

2.安装ant@H_404_3@

http://ant.apache.org/bindownload.cgi@H_404_3@

在环境变量path里面指向ant的解压目录即可@H_404_3@

3.在ant release之前需要更新android工程的配置@H_404_3@

android update project -p . -t 1@H_404_3@

-t：target id，可以如下获取：
./tools/android list target
Available Android targets:
id: 1 or "android-14"
Name: Android 4.0.1
Type: Platform
API level: 14
Revision: 2
Skins: HVGA,WQVGA432,WVGA800 (default),WXGA720,QVGA,WSVGA,WQVGA400,WXGA800,WVGA854@H_404_3@

-n：工程名字
-p：工程路径@H_404_3@

sdk.dir is missing.错误就是没有执行这句命令@H_404_3@