groovy apply plugin: 'com.android.application' android { } dependencies { implementation 'com.android.support:appcompat-v7:28.0.0' implementation 'com.google.android.gms:play-services-ads:17.2.1' } groovy android { buildTypes { release { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' mappingFile '<path_to_mapping_file>' } } }