Android Studio Unable To Resolve Error ':app:predexdebug'

I'm just moving on from Eclipse to the intimidating Android Studio and have trouble getting rid of, what appears to be a fairly common error. Error:Execution failed for task ':app:

Solution 1:

you have a jar file or a lib appearing multiple times and need to work with "configuration" in your "gradle.build"

look for how to analyze dependencies with something like:

./gradlew :app:dependencies

background on wrapper

./gradlew --info clean assembleDebug > ../myProj_build

will give you extra info in a build file that you can analyze for details on your "preDex" errors

Solution 2:

You added your jar dependencies as a compile dependency. You should added it as a "provided", (see you in the README).