android - An error about listview -

i tried make file choose following below link http://www.dreamincode.net/forums/topic/190013-creating-simple-file-chooser/

however, got error "your content must have listview id attribute 'android.r.id.list' "

i have googled error , need listview tag in xml file. however, above example not have , seems working well.

although not triggering file chooser in main page, think code not have differences it. me see if there ways solve problem, please?

file_view.xml

 <?xml version="1.0" encoding="utf-8"?> <linearlayout   xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="wrap_content">   <textview android:id="@+id/fd_text1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleline="true" android:textstyle="bold" android:layout_margintop="5dip"></textview> <textview android:id="@+id/fd_text2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginleft="10dip"></textview> </linearlayout> 

filechooser.java

public class filechooser extends listactivity{  private filearrayadapter adapter;  private file curdir;    @override  public void oncreate(bundle savedinstancestate){   super.oncreate(savedinstancestate);   setcontentview(r.layout.file_view);   curdir = new file("/sdcard/");   fill(curdir);  }   public void fill(file f){   file[] dirs = f.listfiles();   this.settitle("current dir: "+f.getname());   list<fc_option>dir = new arraylist<fc_option>();   list<fc_option>fls = new arraylist<fc_option>();   try{    (file ff: dirs){     if (ff.isdirectory())      dir.add(new fc_option(ff.getname(), "folder", ff.getabsolutepath()));     else      fls.add(new fc_option(ff.getname(), "file size: " + ff.length(), ff.getabsolutepath()));    }    }catch (exception e){    }    collections.sort(dir);   collections.sort(fls);   dir.addall(fls);   if (!f.getname().equalsignorecase("sdcard"))    dir.add(0,new fc_option("..","parent directory", f.getparent()));    adapter = new filearrayadapter(this, r.layout.file_view, dir); //get problems   this.setlistadapter(adapter);   }   //@override   protected void onlistitemclick(listview l, view v, int position, long id){   super.onlistitemclick(l,v,position, id);   fc_option o = adapter.getitem(position);   if (o.getdata().equalsignorecase("folder") || o.getdata().equalsignorecase("parent directory")){    curdir = new file(o.getpath());    fill(curdir);   }else{    onfileclick(o);   }  }   private void onfileclick(fc_option o){   toast.maketext(this,"file click"+o.getname(), toast.length_short).show();  } } 

the filearrayadapter same link.

thank help

this line blame:

setcontentview(r.layout.file_view); 

the file_view.xml layout each item in list, not layout of list itself. since overriding listactivity, don't have set view, removing above line do.