Dx bad class file magic (cafebabe) or version (0033.0000) with ADK14

Question

Since moving to ADK14, I have been unable to build new apks for release on my Windows 7 system.

Building fails with \"conversion to dalvik format failed with error 1

Answer 1

If you are using Android Studio, this can be fixed by using the above advice to target Java 1.6 in your build.gradle by adding the following lines:

apply plugin: 'java'
sourceCompatibility = 1.6
targetCompatibility = 1.6

Discovered this fix from this blog post: http://www.alonsoruibal.com/my-gradle-tips-and-tricks/