我的应用程序运行良好，除了Android 9版本。我无法理解什么是问题

人生必须的知识就是引人向光明方面的明灯。这篇文章主要讲述我的应用程序运行良好，除了Android 9版本。我无法理解什么是问题相关的知识，希望能为你提供帮助。
【我的应用程序运行良好，除了Android 9版本。我无法理解什么是问题】我是android的新手。我有一个应用程序，除了android 9（Pie）以外，所有设备都运行良好。
当试图打开这个应用程序时，它崩溃了。
这是我的gradle和代码;

public class TestiFragment extends Fragment {private static final boolean GRID_LAYOUT = false; RecyclerView mRecyclerView; private RssObject rssObject; private final String RSS_LINK = "http://www.herkul.org/category/kirik-testi/feed/"; private final String RSS_TO_JSON_API = "http://api.rss2json.com/v1/api.json?rss_url="; private TestiAdapter adapter; public static TestiFragment newInstance() { return new TestiFragment(); }@Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = LayoutInflater.from(getActivity()).inflate(R.layout.testi_layout, container, false); mRecyclerView = view.findViewById(R.id.testi_recycler); return view; }@Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); //setup materialviewpagerif (GRID_LAYOUT) { mRecyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 2)); } else { mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); } mRecyclerView.setHasFixedSize(true); mRecyclerView.addItemDecoration(new MaterialViewPagerHeaderDecorator()); if(Common.isConnectedtoInternet(getActivity())){ //loadRss(); }else{ Toast.makeText(getActivity(), "Lütfen ?nternet Ba?lant?n?z? Kontrol Edin!", Toast.LENGTH_SHORT).show(); } }private void loadRss() { AsyncTask< String, String, String> loadRssAsync = new AsyncTask< String, String, String> () { ProgressDialog dialog = new ProgressDialog(getActivity()); @Override protected void onPreExecute() { dialog.setMessage("Yükleniyor..."); dialog.show(); }@Override protected String doInBackground(String... params) { String result; HTTPDataHandler http = new HTTPDataHandler(); result = http.getHTTPData(params[0]); return result; }@Override protected void onPostExecute(String s) { dialog.dismiss(); rssObject = new Gson().fromJson(s, RssObject.class); adapter = new TestiAdapter(getActivity(), rssObject); mRecyclerView.setAdapter(adapter); adapter.notifyDataSetChanged(); } }; StringBuilder url_Get_Data = https://www.songbingjia.com/android/new StringBuilder(RSS_TO_JSON_API); url_Get_Data.append(RSS_LINK); loadRssAsync.execute(url_Get_Data.toString()); }public void removeFromFavorites(String name) { List< Item> items = this.rssObject.getItems(); for (int i = 0; i < items.size(); i++){ if (items.get(i).title.equals(name)){ this.adapter.notifyItemChanged(i); return; } } } }

这是我的傻瓜;

android { compileSdkVersion 28 defaultConfig { applicationId "com.herkultakip.jdevolope.herkultakip" minSdkVersion 17 targetSdkVersion 28 versionCode 3 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } }}

这是我的logcat;

Process: com.herkultakip.jdevolope.herkultakip, PID: 9265 java.lang.NullPointerException: Attempt to read from field 'java.util.List com.herkultakip.jdevolope.herkultakip.Model.RssObject.items' on a null object reference at com.herkultakip.jdevolope.herkultakip.Adapter.TestiAdapter.getItemCount(TestiAdapter.java:71)

如果你想要任何东西给你看，请告诉我:)
这个错误有什么问题？
但我不明白为什么它不适用于Android 9而它适用于所有设备？
答案我相信你的错误在你的loadRss()函数中。