android { sourceSets { main.java.srcDirs += "src/main/kotlin" test.java.srcDirs += "src/test/kotlin" androidTest.java.srcDirs += "src/androidTest/kotlin" } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } kotlinOptions { jvmTarget = '1.8' freeCompilerArgs += "-Xuse-experimental=kotlin.Experimental" } buildTypes { release { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } debug { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' testCoverageEnabled = true } dev { initWith debug } } }