put MainActivity into fullscreen

app/src/main/java/sq/rogue/rosettadrone/MainActivity.java

@@ -669,8 +669,12 @@ public class MainActivity extends AppCompatActivity implements OnMapReadyCallbac
         //requestWindowFeature(Window.FEATURE_NO_TITLE); // for hiding title
 
         // Make fullscreen
-        //getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
-        //WindowManager.LayoutParams.FLAG_FULLSCREEN);
+        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN
+                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
+                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 
         setContentView(R.layout.activity_gui);