메인페스트에서 풀스크린이나 노타이틀바를 사용하면 어플이 팅깁니다. 뭐때문에 그러는걸까요 스타일.xml 소스 첨부합니다. <!-- Base application theme, dependent on API level. This theme is replaced by AppBaseTheme from res/values-vXX/styles.xml on newer devices. --> <!-- Theme customizations available in newer API levels can go in res/values-vXX/styles.xml, while customizations related to backward-compatibility can go here. --> <!-- Application theme. --> <!-- All customizations that are NOT specific to a particular API-level can go here. -->