Problem with Proguard and XmlPullParser

Question

I\'m having a bit of trouble on an Android project using Proguard with some libraries. Specifically, i\'m having an XmlPullParser collision, and no matter what i seem to do,

Answer 1

XML parsing can be a real pain on Android. I recently ran into similar issues when trying to use Jackson XML data binding on Android.

I ended up using the tool Jar Jar Links to move the conflicting classes in the libraries I was trying to use to a new package name that doesn't conflict with the Android platform classes:

http://code.google.com/p/jarjar/

You can tell Jar Jar Links to find the namespaces in the XML library JAR files that we provide that conflict with Android (i.e., javax.xml.stream.*), and have JarJar rename them to something that doesn't conflict (i.e., edu.usf.cutr.javax.xml.stream.*). Android will then accept the libraries that doesn't conflict without the Conversion to Dalvik format failed with error 1.

Here's a zip file that includes files I used to do a batch conversion of the XML libraries I needed, which were:

• StAX API - JSR 173 API interface definitions. Also see Wikipedia StAX entry for more info.
• StAX2 API - Experimental expansion of the original StAX API used by Aalto
• Aalto - StAX 1 and 2 XML parser implementation
• jackson-dataformat-xml - integrates the above XML parser APIs and implementations with the core Jackson project

The generate_android_jarsv21.bat batch file is included to automate the conversion process using JarJar for multiple XML library JARs at once.

JarJar uses a series of rules to change the namespaces in the JAR files. Here's the contents of my rules.txt file that renames all occurences of javax.xml.stream.* to edu.usf.cutr.javax.xml.stream.*:

rule javax.xml.stream.** edu.usf.cutr.javax.xml.stream.@1

You should be able to follow a similar process for the XML libraries you're working with. Once the collision in packages is resolved by moving the library classes to a new package, the other down-stream issues with Proguard should resolve themselves.

I wrote a full tutorial here that includes more detail on "Modifying XML libraries for Android":

https://github.com/CUTR-at-USF/SiriRestClient/wiki/Modifying-XML-libraries-for-Android