RCTLazyLoadViewManager.java 文件源码

@Override
protected void addEventEmitters(
        final ThemedReactContext reactContext,
        final RCTLazyLoadView view) {
    view.setOnEvChangeListener(
            new OnEvChangeListener() {
                @Override
                public void onWindowVisibilityChange( boolean hiddenState) {
                    reactContext.getNativeModule(UIManagerModule.class).getEventDispatcher()
                            .dispatchEvent(new WindowVisibilityChangeEvent(view.getId(), SystemClock.nanoTime(), hiddenState));
                }

            });
}