custom_rules.xml

<?xml version="1.0" encoding="UTF-8"?>

<project name="mpd_rules">
  <!-- setting these two properties works around a bug in Android
       SDK's build.xml, which deletes all .class files every time -->
  <property name="build.last.is.packaging.debug" value="true" />
  <property name="build.is.packaging.debug" value="true" />

  <target name="compile-jni-classes"
          depends="-set-debug-mode,-compile"/>
</project>