RedCore/cocos2d/plugin/tools/android/build_common.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="" default="debug">

    <!-- link jar files -->
    <property name="myjar.libs.dir" value="./sdk" />
    <target name="-pre-compile" depends="check-dependens">
        
        <path id="depend.projects.jar">
            <fileset file="${project.jar.1}" />
            <fileset file="${project.jar.2}" />
        </path>
        
        <if condition="${jarExisted}">
            <then>
                <path id="project.all.jars.path">
                    <path refid="depend.projects.jar" />
                    <fileset dir="${myjar.libs.dir}" includes="*.jar" />
                </path>
            </then>
        </if>
    </target>

    <import file="${sdk.dir}/tools/ant/build.xml" />

    <!-- rename the jar file -->
    <target name="plugin-publish" depends="release">
		<copy file="${out.absolute.dir}/classes.jar" tofile="${out.absolute.dir}/${ant.project.name}.jar" />

		<!-- delete temp files -->
        <delete>
			<fileset dir="${out.absolute.dir}" includes="build.prop AndroidManifest.xml.d jarlist.cache classes.jar"/>
		</delete>
    </target>

    <!-- check the project & jars which current project dependents --> 
    <target name="check-dependens">

        <!-- check the sdk dir is existed or not -->
        <condition property="jarExisted">
            <and>
                <available file="${myjar.libs.dir}" /> 
            </and>
        </condition>

        <!-- check the projects dependents -->
        <condition property="have.proj.1">
            <isset property="android.library.reference.1" />   
        </condition>
        <if condition="${have.proj.1}">
            <then>
                <property name="project.jar.1" value="${android.library.reference.1}/bin/classes.jar" />
            </then>
        </if>

        <condition property="have.proj.2">
            <isset property="android.library.reference.2" />   
        </condition>
        <if condition="${have.proj.2}">
            <then>
                <property name="project.jar.2" value="${android.library.reference.2}/bin/classes.jar" />
            </then>
        </if>
    </target>
</project>