Android: Your content must have a ListView whose id attribute is android.R.id.list

Question

I'm getting this run-time error and I'm really struggling to get to the bottom of it: "Your content must have a ListView whose id attribute is android.R.id.list".

Here is my code:

public class ShowAllJobsInArea extends ListActivity{      Context context;      public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.show_jobs_in_area);         context=getApplicationContext();          String area=Cookie.getAreaSelected();          final ProgressBar thinger=(ProgressBar) findViewById(R.id.progressBar2);         TabHost tabHost=(TabHost)findViewById(android.R.id.tabhost);         tabHost.setup();          TabSpec spec1=tabHost.newTabSpec("Tab 1");         spec1.setContent(R.id.tab1);         spec1.setIndicator("Starting");          TabSpec spec2=tabHost.newTabSpec("Tab 2");         spec2.setContent(R.id.tab2);         spec2.setIndicator("# Days");                  TabSpec spec3=tabHost.newTabSpec("Tab 3");         spec3.setContent(R.id.tab3);         spec3.setIndicator("Rate");           tabHost.addTab(spec1);         tabHost.addTab(spec2);         tabHost.addTab(spec3);          Handler handler = new Handler() {              public void handleMessage(Message message) {                   switch (message.what) {                       case HttpConnection.DID_START:                           thinger.setVisibility(View.VISIBLE);                           break;                       case HttpConnection.DID_SUCCEED:                           String response = (String) message.obj;                           Log.i("EOH",response);                            ArrayList<String> startDates=new ArrayList<String>();                           ArrayList<String> ns=new ArrayList<String>();                           ArrayList<String> rates=new ArrayList<String>();                           HashMap<String, JSONObject> countyObjs=new HashMap<String, JSONObject>();                            JSONObject object = null;                           try {                               object = (JSONObject) new JSONTokener(response).nextValue();                                for(int i=0;i<object.length();i++){                                   String area="";                                   String endDate="";                                   String endTimes="";                                   String id="";                                   String startDate="";                                   String startTimes="";                                   String rate="";                                   String alreadyApplied="";                                   String n="";                                   JSONObject countyObj=object.getJSONObject(String.valueOf(i));                                   countyObjs.put(id, countyObj);                                    area=countyObj.getString("area");                                   endDate=countyObj.getString("endDate");                                   endTimes=countyObj.getString("endTimes");                                   id=countyObj.getString("id");                                   startDate=countyObj.getString("startDate");                                   startTimes=countyObj.getString("startTimes");                                   rate=(countyObj.getString("rates").split(","))[0];                                   alreadyApplied=countyObj.getString("alreadyApplied");                                   n=countyObj.getString("n");                                    startDates.add(startDate+","+id);                                   ns.add(n+","+id);                                   rates.add(rate+","+id);                               }                           }catch (JSONException e) {                               e.printStackTrace();                           }                            Collections.sort(startDates);                           Collections.sort(ns);                           Collections.sort(rates);                                                String[] startDates_str = new String[startDates.size()];                           startDates.toArray(startDates_str);                            setListAdapter(new ArrayAdapter<String>(getApplicationContext(), R.layout.list_item, startDates_str));                           //setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, COUNTRIES));                           ListView lv = getListView();                           lv.setTextFilterEnabled(true);                              thinger.setVisibility(View.INVISIBLE);                            break;                       case HttpConnection.DID_ERROR:                           thinger.setVisibility(View.INVISIBLE);                           break;                       default:                           break;                   }              }         };          List<NameValuePair> params = new ArrayList<NameValuePair>(1);         params.add(new BasicNameValuePair("area", area));          new HttpConnection(handler).post("http://www.xlhi.com/ajax/getJobsInArea.php",params);     } } 

show_jobs_in_area.xml:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout   xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical"   android:layout_width="match_parent"   android:layout_height="match_parent">     <TabHost android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="match_parent">         <LinearLayout android:id="@+id/linearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">             <TabWidget android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@android:id/tabs"></TabWidget>             <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@android:id/tabcontent">                 <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/tab1" android:orientation="vertical">                     <ProgressBar android:id="@+id/progressBar2" android:layout_height="wrap_content" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginTop="25dip"></ProgressBar>                     <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>                 </LinearLayout>                 <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/tab2"></LinearLayout>                     <ListView android:id="@+id/listView2" android:layout_height="wrap_content" android:layout_width="match_parent">                 </ListView>                 <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/tab3">                     <ListView android:id="@+id/listView3" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>                 </LinearLayout>             </FrameLayout>         </LinearLayout>     </TabHost> </LinearLayout> 

list_item.xml:

<?xml version="1.0" encoding="utf-8"?> <TextView      xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:padding="10dp"     android:textSize="16sp" > </TextView> 

I've tried changing the id to android.id="@android:id/list" to no avail - still getting the same error. I was thinking it's something to do with the asynchronous request I'm doing... I'm really stuck now and hope someone can help.

Many thanks in advance,

Answer 1

If you have more than one ListView in your layout you should not extend ListActivity but rather extend Activity and handle the ListViews yourself like;

ListView list1 = (ListView) findViewById(R.id.myList1); list1.setAdapter(...);  ListView list2 = (ListView) findViewById(R.id.myList2); list2.setAdapter(...); 

ListActivity is a shorthand helper class that makes life easier when you are working with only one ListView in your layout.

Answer 2

In you show_jobs_in_area.xml one of the list id to:

A good example is here Listview error: "Your content must have a ListView whose id attribute is 'android.R.id.list'"