Cannot add header view to list -- setAdapter has already been called

Question

I have one edittext field and one "search" button. When I click on search, I have to display a list view with data corresponding to the values entered in the edittext. I have added a header to my list using addHeader(). When I do search first time, I am able to display data in List successfully. But when I do search again, I am getting the below error.

FATAL EXCEPTION: main
java.lang.IllegalStateException: Cannot add header view to list -- setAdapter has already been called.
at android.widget.ListView.addHeaderView(ListView.java:261)
at android.widget.ListView.addHeaderView(ListView.java:284)

I have assigned header to my list before setting the adapter.

Below is my code:

myList = (ListView) findViewById(R.id.searchResultsList);
View header = View.inflate(this, R.layout.search_results_header, null);
myList.addHeaderView(header, null, false);

dataAdapter = new MyCustomAdapter(this, R.layout.results_list_item, searchedResults);
myList.setAdapter(dataAdapter);

Where I am doing wrong?

Try to use dataAdapter.notifyDataSetChanged(); after setting adapter. — Android Killer, Oct 25 '13 at 07:45
Have you checked this [Answer given by Hiren Patel][1]. It will help you. [1]: http://stackoverflow.com/questions/13217386/add-a-header-to-a-gridview-android/27290310#27290310 — Hiren Patel, Dec 04 '14 at 09:27
Before 4.4, adapter should be set before calling addHeaderView method. You can check the difference between 4.4 and 4.3 source code: http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android/4.4_r1/android/widget/ListView.java/?v=diff&id2=4.3.1_r1 — Faruk Toptas, Feb 15 '16 at 10:52

score 25 · Answer 1 · answered Mar 01 '14 at 07:20

25

On android 2.3, add header after setAdapter (even if you have added early, then removed) will throw an exception. To hide or show a header dynamically, use setVisibility(). How? You can see Hiding header views.

answered Mar 01 '14 at 07:20

ishitcno1

713
9
10

score 12 · Answer 2 · answered Oct 25 '13 at 08:27

12

Cannot add header view to list -- setAdapter has already been called. which you can see, the myList.addHeaderView(header) must be execute before myList.setAdapter(adapter);

answered Oct 25 '13 at 08:27

user2919006

129
2

2

I have set the header to my List before setting adapter to the list. – user2740599 Oct 25 '13 at 10:40
10

Note that on 4.4.4 works adding it before. I had this error testing on older devices – GuilhE Jan 09 '15 at 12:56

Hariharan · Answer 3 · 2013-10-25T08:27:50.090

1

Try this..

dataAdapter = new MyCustomAdapter(this, R.layout.results_list_item, searchedResults);
myList.addHeaderView(header);
myList.setAdapter(dataAdapter);
dataAdapter.notifyDataSetChanged();

edited Oct 25 '13 at 08:27

answered Oct 25 '13 at 07:59

Hariharan

24,741
6
50
54

why this `adapter.notifyDataSetChanged()` refreshing a lsitview? – Raghunandan Oct 25 '13 at 08:00
@Raghunandan initially dataAdapter is empty after entering edittext he needs to add the view so need to refresh it. – Hariharan Oct 25 '13 at 08:29
i don't think so you need `adapter.notifyDataSetChanged()`. http://developer.android.com/reference/android/widget/ListView.html#addHeaderView(android.view.View) – Raghunandan Oct 25 '13 at 08:33
@Tamilan After adding the adapter.notifyDataSetChanged() also, I am getting the same error :( – user2740599 Oct 25 '13 at 10:39
@Tamilan Any other solution for this problem – user2740599 Oct 25 '13 at 12:26

score 1 · Answer 4 · answered Mar 18 '14 at 16:13

1

you can add FrameLayout as header view before setting adapter and dynamically add/remove view in FrameLaypout

answered Mar 18 '14 at 16:13

Dmitry

211
1
3

score 1 · Answer 5 · answered Dec 02 '14 at 13:31

I had the same problem today. I have multiple ListViews.. With the information from the first, it builds the list of the next one and everyone has setAdapter in it. For me, the best solution was to put

setListAdapter(null);

on top of the function, where I inflate the Header. I hope this helps..

score 1 · Answer 6 · answered Apr 06 '15 at 08:48

1

If you were used android:entries in ListView in xml file, Its called setAdapter() method before addHeaderView. So remove android:entriesattribute from ListView in xml layout file. It will be work.

answered Apr 06 '15 at 08:48

AvisSiva

707
1
9
17

score 1 · Answer 7 · answered Feb 05 '19 at 07:23

The exception is thrown by android api.For API Level below KITKAT the addHeader() or the addFooter() method must be called before setAdapter() method.

It is mentioned in the api documentation:

Note: When first introduced, this method could only be called before setting the adapter with setAdapter(ListAdapter). Starting with Build.VERSION_CODES.KITKAT, this method may be called at any time. If the ListView's adapter does not extend HeaderViewListAdapter, it will be wrapped with a supporting instance of WrapperListAdapter.

score 0 · Answer 8 · answered Aug 03 '16 at 09:23

0

After I set

final ViewGroup header = (ViewGroup) inflater.inflate(R.layout.item, listView, false);
listView.addHeaderView(header, null, true);

before

listView.setAdapter(adapter);

a problem still appeared. Then I made Build > Clean Project.

answered Aug 03 '16 at 09:23

CoolMind

26,736
15
188
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score -1 · Answer 9 · answered Jul 02 '15 at 09:54

After so much efforts i got solution for my side i hope this will helps someone too

i already set adpater at the last (after view added) but dont know why i was suffring from same error so here i did something like this code

// Set View here
View view = getLayoutInflater().inflate(R.layout.navigation_header,null);
mDrawerList.addHeaderView(view);
// init your adapter
adapter1 = new YourListAdapter(getApplicationContext(),blabla);
// set adapter into handler
Handler handler = new Handler();
handler.postDelayed(new Runnable() {        
   @Override
  public void run() {
  // TODO Auto-generated method stub
  mDrawerList.setAdapter(adapter1);
  }
}, 100);

I put my adapter in to handler sometime it happends that adapter set faster then view so this code enough for me to solve this exception. :)

score -2 · Answer 10 · edited Jan 14 '18 at 11:12

I have used the following code in my sample application to set a ListView header:

ListView lv = getListView();
View headerView = getLayoutInflater().inflate(R.layout.layout_header, null, false);
lv.addHeaderView(headerView);
final TumblrDB db = new TumblrDB(this);
c = db.query();
startManagingCursor(c);
adapter = new CustomCursorAdapter(this, R.layout.layout_del, c, new String[]{TumblrDB.DATE, TumblrDB.DESC}, new int[]{R.id.txt_a, R.id.txt_b});
lv.setAdapter(adapter);

Cannot add header view to list -- setAdapter has already been called

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