Using Android AsyncTask to download html file
- by Lukas Tomsu
i just started with android and i'm working on a simple app that should download contents of a html file. I'm using AsyncTask as suggested, but i'm encountering one problem. In the following code (i followed a tutorial code), i get tv cannot be resolved for the onPostExecute method. How to access the downloaded file? Thank You:
public class FlashResults extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv = new TextView(this);
setContentView(tv);
readWebpage(tv);
}
protected class DownloadPage extends AsyncTask<String, Void, String> {
protected String doInBackground(String... urls) {
String responseStr = null;
try {
for (String url : urls) {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(get);
HttpEntity httpEntity = httpResponse.getEntity();
responseStr = EntityUtils.toString(httpEntity);
}
} catch (UnsupportedEncodingException e) {
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
return responseStr;
}
protected void onPostExecute(String result) {
tv.setText(result);
}
}
public void readWebpage(View v) {
DownloadPage task = new DownloadPage();
task.execute(new String[] { "http://seznam.cz" });
}
}
