在热更新动态加载bundle 文件会出现程序未注册的情况，原因是动态加载bundle文件的时候没有将bundle加载进去，还是原来MainApplication加载的bundle文件，从而导致出现app应用程序未注册的情况

解决办法：重新设置一下bundle路径

private void setJSBundle(ReactInstanceManager instanceManager, String latestJSBundleFile) throws IllegalAccessException {
    try {
        JSBundleLoader latestJSBundleLoader;
        if (latestJSBundleFile.toLowerCase().startsWith("assets://")) {
            latestJSBundleLoader = JSBundleLoader.createAssetLoader(getApplicationContext(), latestJSBundleFile, false);
        } else {
            latestJSBundleLoader = JSBundleLoader.createFileLoader(latestJSBundleFile);
        }
        Field bundleLoaderField = instanceManager.getClass().getDeclaredField("mBundleLoader");
        bundleLoaderField.setAccessible(true);
        bundleLoaderField.set(instanceManager, latestJSBundleLoader);
    } catch (Exception e) {
        throw new IllegalAccessException("Could not setJSBundle");
    }
}