Android/Java - IO 异常 - 似乎无法加载 HTML 资产

    CalendarParse parser = new CalendarParse();
            parser.countSundays(this);  



public class CalendarParse  {

        String calString = "";
        Document cal = null;
        InputStream is = null;


        public void countSundays(Context context)
        {
            AssetManager assMan = context.getAssets();

            try
            {
                System.out.println("Trying");
                InputStream is = assMan.open("assets/brownbear.html");
                if (is == null){
                    Log.i("FAIL","File not found.");
                }
                else{
                    Log.i("SUCCESS","We did it");
                }
               Document cal = Jsoup.parse(is, "utf-8", "ob stuff");
                Element calBlock =  cal.select("table#CalBlock").first();
               Element calRows = calBlock.select("tr").get(0);
              Log.i("SUCCESS","Parsing has occurred");
                System.out.println(calRows.toString());

            }
            catch(IOException e){
                System.out.println("IO Exception at local calendar asset");
            }


        }

brownbear.html在 assets 文件夹中，并将其写入 Main Activity。最初它是一个单独的 .java 类，但是当“上下文”在主活动之外时，我无法准确确定“上下文”如何影响 AssetManager，并且我试图在排除故障时减轻未知数。

正如所写，“尝试”打印出来，没有 Log.i 打印出来（大概是因为我们在

InputStream is = assMan.open("assets/brownbear.html");

) “本地日历资产的 IO 异常”总是打印出来。

如果我将该行更改为

assMan.open("brownbear.html");

然后“成功”“我们做到了”运行，但发生致命异常：

2019-02-01 02:28:06.069 5637-5637/? E/AndroidRuntime：致命异常：主进程：com.myapplication.schedulo，PID：5637 java.lang.RuntimeException：无法启动活动 ComponentInfo{com.myapplication.schedulo/com.myapplication.schedulo.MainActivity}：java.lang。 NullPointerException：尝试在空对象引用上调用虚拟方法“org.jsoup.select.Elements org.jsoup.nodes.Element.select(java.lang.String)”

我究竟做错了什么？？