Example of a gradle file for an Android library which does not support gradle yet.

build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.+'
    }
}

apply plugin: 'android-library'

android {
    compileSdkVersion 19
    buildToolsVersion = "19.0.1"

    defaultConfig {
        minSdkVersion 9
        targetSdkVersion 19
    }

    sourceSets {
        main {
            assets.srcDirs       = ['assets']
            res.srcDirs          = ['res']
            aidl.srcDirs         = ['src']
            resources.srcDirs    = ['src']
            renderscript.srcDirs = ['src']
            java.srcDirs         = ['src']
            manifest.srcFile 'AndroidManifest.xml'
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:+'
}