Extra Service Proejct 화면 회전, 밝기, 음량 컨트롤이 가능한 Floating Button 1. Android Control Service 어플 제작 Environment CPU : Intel Core i5-6200U @ 2.30GHz OS : Windows 10 Home 64 bit Memory : 4096MB Language : Java IDE : Android Studio Android os : Oreo, Nougat Result