Put webpage text into a textview (Android)

Question

I want to put a text from a webpage to a textview on Android 3.0. I have this code:

public class Biografie extends Activity {
    private TextView outtext;
    private String HTML;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_biografie);

        outtext= (TextView) findViewById(R.id.textview1); 

        try { 
        getHTML();
    } catch (Exception e) {
        e.printStackTrace();
    }       
    outtext.setText("" + HTML);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.biografie, menu);
        return true;
    }

    private void getHTML() throws ClientProtocolException, IOException 

    {
        HttpClient httpClient = new DefaultHttpClient();
        HttpContext localContext = new BasicHttpContext();
        HttpGet httpGet = new HttpGet("http://artistone.appone.nl/api/biografie.php?dataid=998"); //URL!
        HttpResponse response = httpClient.execute(httpGet, localContext);
        String result = "";

        BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        String line = null;
        while ((line = reader.readLine()) != null) {
            result += line + "\n";
            HTML = result;
        }

    }

}

My TextView returns "null" instead of the text from the page. Please help me to fix this. Thanks in regard.

Answer 1

Change your code to:

while ((line = reader.readLine()) != null) {
    result += line + "\n";
}
HTML = result;

and try this: outtext.setText(Html.fromHtml(HTML));

And instead of performing network action in main thread i will suggest you to do this in separate thread using AsyncTask

Answer 2

The problem is that you are getting NetworkOnMainThreadException That is because you are downloading network content on the Main Thread (Activity's Thread).

Instead you need to use a background thread to download that content, or use AsynchTask .

A simple code that should fix this issue:

    final Handler handler = new Handler();
    Thread thread = new Thread() {
        public void run() {
            try {
                getHTML();
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        outtext.setText("" + HTML);

                    }
                });
            } catch (Exception e) {
                e.printStackTrace();
                    handler.post(new Runnable() {
                    @Override
                    public void run() {
                        outtext.setText(e.toString());

                    }
            }
        }
    };
thread.start(); // I forgot to start the thread. sorry !

Instead of :

    try { 
           getHTML();
    } catch (Exception e) {
        e.printStackTrace();
     }       
    outtext.setText("" + HTML);

Also take a look at this tutorial about android threads : Tutorial