Replacing the javascript jar file merge with pure ant

build/android/ant/apk-obfuscate.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
     Copyright (C) 2005-2008 The Android Open Source Project
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
 
          http://www.apache.org/licenses/LICENSE-2.0
 
@@ skipping 51 matching lines @@
   <!--
     Override obfuscate target to pass javac.custom.classpath to Proguard. SDK tools do not provide
     any way to pass custom class paths to Proguard.
    -->
   <target name="-obfuscate">
     <if condition="${project.is.testapp}">
       <then>
         <!-- get the project manifest package -->
         <xpath input="${out.manifest.abs.file}"
                 expression="/manifest/@package" output="project.app.package" />
-        <property name="create.test.jar.file"
-          location="${CREATE_TEST_JAR_PATH}" />
-        <script language="javascript" src="${create.test.jar.file}"/>
+        <loadresource property="project.app.packagepath">
+          <propertyresource name="project.app.package"/>
+          <filterchain>
+            <replacestring from="." to="/"/>
+          </filterchain>
+        </loadresource>
+        <property name="create.test.jar.exclusions" value="${project.app.packagepath}/R.class ${project.app.packagepath}/R$*.class ${project.app.packagepath}/Manifest.class ${project.app.packagepath}/Manifest$*.class ${project.app.packagepath}/BuildConfig.class"/>
+        <jar destfile="${TEST_JAR_PATH}"
+             excludes="${create.test.jar.exclusions}"
+             duplicate="preserve"
+             >
+          <restrict>
+            <name name="**/*.class"/>
+            <archives>
+              <zips>
+                <path refid="javac.custom.classpath"/>
+              </zips>
+            </archives>
+          </restrict>
+          <fileset dir="${out.dir}/classes"/>
+        </jar>
       </then>
     </if>
     <if>
       <condition>
         <and>
           <istrue value="${proguard.enabled}"/>
           <equals arg1="${CONFIGURATION_NAME}" arg2="Release"/>
         </and>
       </condition>
       <then>
@@ skipping 62 matching lines @@
           -dump         "${obfuscate.absolute.dir}/dump.txt"
           -printseeds   "${obfuscate.absolute.dir}/seeds.txt"
           -printusage   "${obfuscate.absolute.dir}/usage.txt"
           -printmapping "${obfuscate.absolute.dir}/mapping.txt"
         </proguard>
       </then>
     </if>
     <touch file="${STAMP}" />
   </target>
 </project>