This illustration shows the IoTAndroidHelloWorld application in the Android Studio environment. In the navigation tree, the app folder and Gradle Scripts folders are expanded. Below Gradle Scripts, the build.gradle file is selected. 

Next to the navigation tree, the code editor displays the content of the build.gradle file:

apply plugin: 'com.android.application'
repositories{
    flatDir{
        dirs rootDir.getAbsolutePath() + "/../../lib"
     }
}
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "iot.myandroid.iotandroidhelloworld"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
}
buildTypes {