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javaandroidandroid-fragmentsandroid-asynctaskjsoup

Taking an webpage element with Jsoup in AsyncTask in a fragment (Android Newbie)

I'm new to Java and Android so I need your help. I've implemented JSoup in my app to take this from a webpage and show it in a textview (I'm operating in a fragment but i think it's the same as a standard activity in this case).

<body marginwidth="0" marginheight="0">
<h1></h1>
<p class="testoprezzo">0.5516 </p>
</body>

I've to take only 0.5516

I have no idea on how to do it. Can you help me? This is the code I've already written:

class fetcher extends AsyncTask<Void,Void, Void> {

    @Override
    protected Void doInBackground(Void... arg0) {

        try {

            String value = "https://mywebpage.net/";
            Document document = Jsoup.connect(value).followRedirects(false).timeout(30000).get();
            Element p= document.select ("p.testoprezzo").first();
            ((Globals)getApplication()).setValore(p.text());




        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);


        TextView valore = findViewById(R.id.textView4);
        valore.setText(((Globals)getApplication()).getValore());








    }
}

Thank you in advance!

Solution

  • Use the Elements to get the p tag.

    class fetcher extends AsyncTask<Void,Void, Void> {
String txtValue;

@Override
protected Void doInBackground(Void... arg0) {

    try {

        String value = "https://mywebpage.net/";
        Document document = Jsoup.connect(value).followRedirects(false).timeout(30000).get();
        Element p= document.select ("p.testoprezzo").first();
        txtValue = p.text();




    } catch (Exception e) {
        // TODO Auto-generated catch block
        txtValue = null;
        e.printStackTrace();
    }

    return null;
}

@Override
protected void onPostExecute(Void aVoid) {
    super.onPostExecute(aVoid);


    TextView valore = findViewById(R.id.textView4);
    valore.setText(txtValue);
}

    }

    Please see that Elements and Element are different. Use them as per your need. Here is the list of all selectors along with example.

    Also note: DON'T DO ANY U.I. CHANGE in doInBackground method, or else you will get an error.