Gradle Task Jar Not Working

I am trying to include a file into my .jar but failed to do so, it says BUILD SUCCESSFUL but the classes.dex is never included inside the jar... I'm really stressed from this gradd

Solution 1:

try to change include to from

task jar(type: Jar) {
    println( "WHAT" + "${buildDir}\\classes\\classes.dex")
    from ("${buildDir}\\classes\\classes.dex")
}