basic build.gradle for a library project

build.gradle

apply plugin: 'android-library'

android {
    compileSdkVersion 19
    buildToolsVersion '19.1'

    defaultConfig {
        minSdkVersion 15
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"

        lintOptions {
            abortOnError false
        }

        buildTypes {
            release {
                runProguard false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
            }
        }
    }

}
dependencies {
}