Update GameActivity.java

Handle android onWindowFocusChanged in GameActivity.java

templates/android/template/app/src/main/java/org/haxe/lime/GameActivity.java

@@ -310,6 +310,15 @@ public class GameActivity extends SDLActivity {
 	::end::
 	
 	
+	@Override public void onWindowFocusChanged(boolean hasFocus) {
+
+		super.onWindowFocusChanged(hasFocus);
+
+		updateSystemUI ();
+
+	}
+	
+	
 	public static void openFile (String path) {
 		
 		try {
@@ -428,4 +437,4 @@ public class GameActivity extends SDLActivity {
 	}
 	
 	
-}
+}