Error After Adding Play-services Library : ':app:transformclasseswithjarmergingfordebug'

My project was working perfectly with those libraries included: // Support libraries compile 'com.android.support:support-v4:23.1.0' compile 'com.android.support:appcompat-v7:23.1.

Solution 1:

Looks like play-services already contains support-v4. Try excluding it from the classpath

compile('com.google.android.gms:play-services:8.1.0') {
    exclude group: 'com.android.support', module: 'support-v4'
}

The second error is different. First thing don't use Java8 it's not supported instead use Java7 Also what version of the Android Gradle Plugin are you using? Try the latest com.android.tools.build:gradle:1.4.0-beta4

Also try not using the latest play-services I ran into an issue compiling against 8.1.0 but not 7.8.0