public void setLegacyApplication(@NonNull LegacyApplication legacyApplication) {
        this.legacyApplication = legacyApplication;
    }
Sets the jme game instance that will be engaged into the {@link SystemListener}.

@param legacyApplication your jme game instance.
jme3-android/src/main/java/com/jme3/view/surfaceview/JmeSurfaceView.java