ProGuard

How to significantly reduce Yaxim APK size in three easy steps

You can squeeze Yaxim from really-really-huge to under 200KB!

1. Download ProGuard

Download ProGuard and copy proguard.jar to yaxim/tools.

2. Patch your build.xml

Save the following to build.xml-proguard.diff and run patch < build.xml-proguard.diff

--- build.xml.orig	2009-12-22 22:32:40.000000000 +0100
+++ build.xml	2009-12-22 22:36:08.000000000 +0100
@@ -63,4 +63,60 @@
          build steps are used.
     -->
     <setup />
+
+    <target name="check-proguard">
+        <available file="tools/proguard.jar" property="have.proguard"/>
+    </target>
+
+    <target name="proguard" depends="check-proguard">
+        <fail unless="have.proguard">You requested ProGuard, but you don't have the JAR available!</fail>
+    </target>
+
+    <target name="proguard.execute" depends="compile" if="have.proguard">
+        <taskdef resource="proguard/ant/task.properties"
+                classpath="tools/proguard.jar" />
+        <proguard>
+	    -injars ${out-classes}:libs
+            -outjars ${out-folder}/classes.min.jar
+            -libraryjars ${android-jar}
+            -dontskipnonpubliclibraryclasses
+            -dontobfuscate
+	    -dontoptimize
+            -printusage ${out-folder}/proguard.usage
+
+	    -dontwarn org.jivesoftware.**
+            -keep public class * extends android.app.Activity
+            -keep public class * extends android.app.Service
+	    -keepclassmembers enum * {
+		public static **[] values();
+		public static ** valueOf(java.lang.String);
+	    }
+
+        </proguard>
+    </target>
+
+    <!-- Convert this project's .class files into .dex files. -->
+    <target name="dex.proguard" depends="proguard.execute" if="have.proguard">
+        <echo>Converting compiled files and external libraries into ${out-folder}/${dex-file}...</echo>
+        <apply executable="${dx}" failonerror="true" parallel="true">
+            <arg value="--dex" />
+            <arg value="--output=${intermediate-dex-location}" />
+            <fileset dir="${out-folder}" includes="*.min.jar" />
+            <!--fileset dir="${external-libs-folder}" includes="*.jar"/-->
+        </apply>
+    </target>
+
+    <!-- Convert this project's .class files into .dex files. -->
+    <target name="dex.vanilla" depends="compile" unless="have.proguard">
+        <echo>Converting compiled files and external libraries into ${out-folder}/${dex-file}...</echo>
+        <apply executable="${dx}" failonerror="true" parallel="true">
+            <arg value="--dex" />
+            <arg value="--output=${intermediate-dex-location}" />
+            <arg path="${out-classes-location}" />
+            <fileset dir="${external-libs-folder}" includes="*.jar"/>
+        </apply>
+    </target>
+
+    <target name="dex" depends="dex.vanilla, dex.proguard" />
+
 </project>

3. Compile Yaxim with “proguard” argument

rm -rf bin gen
ant proguard debug