ListView NullPointerException

Bonjour, J'ai essaye de creer un fichier XML qui prend une simple listeView setté avec un adapter perso comme ceci:
Code:

1 2 3 4 5 6 7 8 9 10 <?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="fill_parent" android:orientation="vertical"> <ListView android:id="@+id/listpromo" android:layout_width="fill_parent" android:layout_height="fill_parent"/> </LinearLayout>
voici mon activité:
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 public class ListSample_category3 extends Activity { public final static String ITEM_TITLE = "title"; public final static String ITEM_COMPANY= "company"; public final static String ITEM_DATE = "availabledate"; private ListView list; public Map<String,?> createItem(String title, String company, String date) { Map<String,String> item = new HashMap<String,String>(); item.put(ITEM_TITLE, title); item.put(ITEM_COMPANY, company); item.put(ITEM_DATE, date); return item; } @Override public void onCreate(Bundle bundle) { super.onCreate(bundle); List<Map<String,?>> security = new LinkedList<Map<String,?>>(); security.add(createItem("Remember passwords", "Cisco", "2012-02-10")); security.add(createItem("Clear passwords", "Microsoft", "2012-02-10")); security.add(createItem("Show security warnings", "Apple", "2012-02-10")); // create our list and custom adapter SeparatedListAdapter adapter = new SeparatedListAdapter(this); adapter.addSection("Categorie 1", new ArrayAdapter<String>(this, R.layout.list_item_category3, new String[] { "First item", "Item two" })); adapter.addSection("Categorie 2", new SimpleAdapter(this, security, R.layout.list_complex_category3, new String[] { ITEM_TITLE, ITEM_COMPANY, ITEM_DATE }, new int[] { R.id.list_complex_title, R.id.list_complex_company, R.id.list_complex_date })); // create ListView //ListView list = new ListView(this); list = (ListView) findViewById(R.id.listpromo); // OnItemClickListener on all items OnItemClickListener listener = new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { } }; list.setOnItemClickListener(listener); list.setItemsCanFocus(true); list.setAdapter(adapter); this.setContentView(list); } }
Mais j'ai un NullPointerException :

08-05 14:49:24.875: E/AndroidRuntime(2558): FATAL EXCEPTION: main
08-05 14:49:24.875: E/AndroidRuntime(2558): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dev.prixo/com.dev.prixo.OngletsActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dev.prixo/com.dev.prixo.ListSample_category3}: java.lang.NullPointerException
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.os.Handler.dispatchMessage(Handler.java:99)
08-05 14:49:24.875: E/AndroidRuntime(2558): at android.os.Looper.loop(Looper.java:130)
08-05 14:49:24.875: E/AndroidRuntime(2558): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dev.prixo/com.dev.prixo.ListSample_category3}: java.lang.NullPointerException

Je ne vois pas d'ou viens le pb..