So here I am with my family our of town on a weekend, and I thought I'd give Log4j on Android a try.
The first thing I run into is: FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':Application:transformResourcesWithMergeJavaResForDebug'. > com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/LICENSE File1: C:\Users\ggregory\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-core\2.8.2\979fc0cf8460302e4ffbfe38c1b66a99450b0bb7\log4j-core-2.8.2.jar File2: C:\Users\ggregory\.gradle\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-api\2.8.2\e590eeb783348ce8ddef205b82127f9084d82bf3\log4j-api-2.8.2.jar * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED Total time: 1.995 secs which is solved by: https://stackoverflow.com/questions/37586800/android-gradle-duplicate-files-copied-in-apk-meta-inf-license-txt Which means I have to add this to my build: packagingOptions { exclude 'META-INF/DEPENDENCIES' exclude 'META-INF/LICENSE' } I wonder if we should generate these files pretending we are in an uber jar, either: - with the project name in the name like META-INF/log4j2.LICENSE - with maven AID in the name like META-INF/log4j-api.LICENSE - with maven coords in the name like META-INF/org.apache.logging.log4j-log4j-api.LICENSE As an aside files like LICENSE and NOTICE do not have .txt extensions which is lame IMO. Ignore and do nothing? Thoughts? Gary