Invoke-customs are only supported starting with Android O

app/build.gradle에 아래 옵션을 추가

 

Java 8을 쓴다면

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

 

 

Java 10을 쓴다면 

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_10
        targetCompatibility JavaVersion.VERSION_1_10
    }
}

 

 

Java 7을 쓴다면

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
}