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타이틀 바 없애기 경로 : res/values/themes.xml , res/values-night/themes.xml 상태 바 없애기 경로 : MainActivity.java import android.os.Build; import android.view.WindowInsets; import android.view.WindowInsetsController; import android.view.WindowManager; ... public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* 전..