ReactFragment.java 文件源码

/**
 * Get the {@link ReactNativeHost} used by this app. By default, assumes
 * {@link Activity#getApplication()} is an instance of {@link ReactApplication} and calls
 * {@link ReactApplication#getReactNativeHost()}. Override this method if your application class
 * does not implement {@code ReactApplication} or you simply have a different mechanism for
 * storing a {@code ReactNativeHost}, e.g. as a static field somewhere.
 */
protected ReactNativeHost getReactNativeHost() {
    return ((ReactApplication) getActivity().getApplication()).getReactNativeHost();
}