How to get HTML source code from url in android?

Question

I am working on project to get html source code in a string in vb.net using dom parser to get source code of a page.

1) I want to implement the same in android, what will be the approach to get source code of webpage by calling a url in android. 2) I would be having two layouts for source code in one layout and other for the webpage itself. If i am changing title tag value in source code layout, its must be automatically updated on actual webpage ?

What would be the best approach to do that in android ?

Any kind of help will be highly appreciated.

Answer 1

You can get Html code from any URL by using ion library.

Go to the project structure, click on app, click on Dependencies, click on '+', just type ion you will see com.koushikdutta.ion:ion:2.1.8 click it and click ok. Now you can use ion library to get html code from URL.

public class HtmlCode extends Activity {
    TextView tv;

    public void onCreate(Bundle s)
    {
        super.onCreate(s);
        setContentView(R.layout.httpexample);

        tv = (TextView)findViewById(R.id.tvHttp);
        Ion.with(getApplicationContext()).load("http://www.your_URL.com").asString().setCallback(new FutureCallback<String>() {
            @Override
            public void onCompleted(Exception e, String result) {

                tv.setText(result);
            }
        });
    }
}

Answer 2

You can go for Web scraping techniques in Java. There are plenty of libraries available which I found simple and robust is a library called jaunt . You can read the documentation here

Answer 3

Try this:

    URL google = null;
    try {
        google = new URL("https://www.google.com");
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    BufferedReader in = null;
    try {
        in = new BufferedReader(new InputStreamReader(google.openStream()));
    } catch (IOException e) {
        e.printStackTrace();
    }
    String input = null;
    StringBuffer stringBuffer = new StringBuffer();
    while (true)
    {
        try {
            if (!((input = in.readLine()) != null)) break;
        } catch (IOException e) {
            e.printStackTrace();
        }
        stringBuffer.append(input);
    }
    try {
        in.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    String htmlData = stringBuffer.toString();