Android 横屏全屏方法

@OverrideprotectedvoidonCreate(BundlesavedInstanceState) {
super.onCreate(savedInstanceState);
WindowManager.LayoutParamslp=this.getWindow().getAttributes();
if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.P) {
lp.layoutInDisplayCutoutMode=WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES;
        }
this.getWindow().setAttributes(lp);
setContentView(R.layout.activity_full_screen_clock);
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE|View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN|View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION|View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|View.SYSTEM_UI_FLAG_FULLSCREEN|View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER_LANDSCAPE);
    }