Android realizes immersive status bar _android

Some time ago, the immersion status bar was used in the project, and here the code is as follows:

Package com.jackie.immersive; 
Import Android.os.Build; 
Import Android.os.Bundle; 
Import android.support.v7.app.AppCompatActivity; 
 
Import Android.view.View;  public class Mainactivity extends appcompatactivity {@Override protected void onCreate (Bundle savedinstancestate) 
    {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.activity_main); 
    @Override public void Onwindowfocuschanged (Boolean hasfocus) {super.onwindowfocuschanged (hasfocus); 
      if (Hasfocus && Build.VERSION.SDK_INT >=) {View Decorview = GetWindow (). Getdecorview (); Decorview.setsystemuivisibility (view.system_ui_flag_layout_stable | view.system_ui_flag_layout_hide_navigation | View.system_ui_flag_layout_fullscreen | view.system_ui_flag_hide_navigation | View.system_ui_flag_fullscreen | 
    View.system_ui_flag_immersive_sticky);  } 
  } 
}

The effect is as follows:

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