build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply plugin: 'com.github.ben-manes.versions'

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'
        classpath 'com.github.ben-manes:gradle-versions-plugin:0.8'
    }
}

allprojects {
    repositories {
        jcenter()
        mavenCentral()
    }
}

ext {
    compileSdkVersion = 22
    buildToolsVersion = '21.1.2'

    // API level 15+ -> version 15xxx
    versionCode = 15118
    versionName = '23.1.1'
}

ext.libraries = [

        supportv4: 'com.android.support:support-v4:22.1.1',
        supportannotations: 'com.android.support:support-annotations:22.1.1'

]