how to read text file from internet in Android -

i want read remote text file , show content in textview. have written code, doesn't information text file , has "force stop" error. how can find reason of problem or solve it? isn't there wrong in code?

private class downloadfile extends asynctask<string, integer, void> { protected void doinbackground() {     try {         url url = new url("http://host/f.txt");                bufferedreader in = new bufferedreader(new inputstreamreader(url.openstream()));         string line = null;         while ((line = in.readline()) != null) {         //get lines         }         in.close();         lbl.settext(line);     }      catch (malformedurlexception e) {         e.printstacktrace();     }      catch (ioexception e) {         e.printstacktrace();     } } protected void onprogressupdate() {     //called when background task makes progress } protected void onpreexecute() {      //called before doinbackground() started } protected void onpostexecute() {      //called after doinbackground() has finished  } @override protected void doinbackground(string... arg0) {     // todo auto-generated method stub     return null; } } 

and oncreate code:

downloadfile d=new downloadfile(); d.doinbackground(); 

please solve problem!

a couple things:

1) cannot modify ui thread background thread. doinbackground() runs on background thread, should update ui on onpostexecute().

2) have 2 implementations of doinbackground(). first 1 doesn't override doinbackground() in asynctask. move code 1 overrides asynctask

3) doinbackground() should return string can use update text on textview in onpostexecute. asynctask should asynctask<string,void,string>

4) when create donwloadfile() instance should invoke execute(), otherwise background thread not start , doinbackground() not called.

5) while loop checking if there still data on inputstream, not storing anywhere. use stringbuilder append incoming information here.