Require Gradle project from another directory

The simplest way is to make MyProject a multi project with the Logger project as a subproject.

settings.gradle in MyProject directory:

include ":logger"
project(":logger").projectDir = file("../logger")

In the build.gradle of MyProject you can now reference this lib as a project:

dependencies {
     compile 'com.android.support:gridlayout-v7:18.0.0'
     compile 'com.android.support:appcompat-v7:18.0.0'
     compile project(":logger")
}