blocks|key|4714452|text|试试这个..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4714453|dataAdapter+=+new+MyCustomAdapter(this,+R.layout.results_list_item,+searchedResults);
myList.addHeaderView(header);
myList.setAdapter(dataAdapter);
dataAdapter.notifyDataSetChanged();|code-block|syntax|javascript|4714454|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this..

<pre><code>dataAdapter = new MyCustomAdapter(this, R.layout.results_list_item, searchedResults);
myList.addHeaderView(header);
myList.setAdapter(dataAdapter);
dataAdapter.notifyDataSetChanged();
</code></pre>

blocks|key|208365|text|无法将标题视图添加到列表中--+setAdapter已被调用。可以看到，myList.addHeaderView(header)必须在myList.setAdapter(适配器)之前执行；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|208366|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

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);

blocks|key|4714476|text|我在我的示例应用程序中使用了以下代码来设置ListView标头：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4714477|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);|code-block|syntax|javascript|4714478|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

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

<pre><code>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);
</code></pre>

blocks|key|4714505|text|在Android2.3上，在setAdapter之后添加header+(即使你已经提前添加，然后删除)会抛出一个异常。若要动态隐藏或显示标题，请使用setVisibility()。多么?你可以看到Hiding+header+views。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4714506|entityMap|0|LINK|mutability|MUTABLE|url|http://pivotallabs.com/android-tidbits-6-22-2011-hiding-header-views^0|2Q|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

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 <a href="http://pivotallabs.com/android-tidbits-6-22-2011-hiding-header-views">Hiding header views</a>.

blocks|key|208422|text|您可以在设置适配器前添加FrameLayout作为标题视图，也可以在FrameLaypout中动态添加/删除视图|type|unstyled|depth|inlineStyleRanges|entityRanges|data|208423|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

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

blocks|key|208460|text|今天我也遇到了同样的问题。我有多个ListViews..使用第一个列表中的信息，它会构建下一个列表，每个人都会在其中包含setAdapter。对我来说，最好的解决方案是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|208461|setListAdapter(null);|code-block|syntax|javascript|208462|在函数的顶部，我在那里充气头部。我希望这会有帮助..。|208463|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

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

<pre><code>setListAdapter(null);
</code></pre>

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

blocks|key|208489|text|如果您在xml文件的ListView中使用了android:entries，那么它在addHeaderView之前被称为setAdapter()方法。因此，从xml布局文件中ListView中删除android:entries属性。这将是工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|208490|entityMap^0|M|F|1O|C|2Q|F|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

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

blocks|key|4714656|text|经过这么多努力，我得到了自己的解决方案，我希望这也能帮助到一些人|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4714657|我已经在最后设置了adpater+(在添加了视图之后)，但不知道为什么我会遇到同样的错误，所以我在这里做了一些类似这样的代码|4714658|//+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);|code-block|syntax|javascript|4714659|我将适配器放到处理程序中，有时适配器设置比视图更快，所以这段代码足以解决这个异常。:)|4714660|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

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

<pre><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);
</code></pre>

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. :)

blocks|key|4714708|text|在我设置好之后|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4714709|final+ViewGroup+header+=+(ViewGroup)+inflater.inflate(R.layout.item,+listView,+false);
listView.addHeaderView(header,+null,+true);+|code-block|syntax|javascript|4714710|在此之前|4714711|listView.setAdapter(adapter);|4714712|问题还是出现了。然后我创建了Build+>+Clean+Project。|4714713|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

After I set

<pre><code>final ViewGroup header = (ViewGroup) inflater.inflate(R.layout.item, listView, false);
listView.addHeaderView(header, null, true); 
</code></pre>

before

<pre><code>listView.setAdapter(adapter);
</code></pre>

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

blocks|key|208661|text|addHeader()或addFooter()方法必须在调用setAdapter()方法之前调用，该异常由在KITKAT以下的android+api.For+API级别抛出。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|208662|api文档中有提到：|208663|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。|offset|length|208664|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/reference/android/widget/ListView.html#addHeaderView(android.view.View,%2520java.lang.Object,%2520boolean))^0|0|0|0|98|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

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:

<a href="https://developer.android.com/reference/android/widget/ListView.html#addHeaderView(android.view.View,%20java.lang.Object,%20boolean)" rel="nofollow noreferrer">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</a>.

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.

<pre><code>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)
</code></pre>

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

Below is my code:

<pre><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);
</code></pre>

Where I am doing wrong?

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

我有一个edittext字段和一个“搜索”按钮。当我单击search时，我必须显示一个列表视图，其中包含与edittext中输入的值相对应的数据。我已经使用addHeader()在我的列表中添加了一个头。当我第一次进行搜索时，我能够成功地在列表中显示数据。但是当我再次搜索时，我得到了下面的错误。FATAL EXCEPT...

问无法将标题视图添加到列表-- setAdapter已被调用
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