listView - ArrayAdapter

Sziasztok,

hosszas keresés után ide jutottam...

A következő a problémám:

Van kettő listView-em. Egyik a main.xml layout-on, a másik pedig egy másikon (waitlay.xml). A main.xml-en lévőt sikeresen feltudom tölteni, de ha átváltok a másik layoutra, akkor az azon lévő listView feltöltését akarom elvégezni egy tömbből, megáll a program.

Köszönöm a választ!

A kód részlet:

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);        
        BupoActivity.context = getApplicationContext();         
        listView = (ListView) findViewById(R.id.mylist);
        listView2 = (ListView) findViewById(R.id.mylist2);        
        database = new megallok(this);
        create_list2();        
    }
public void create_list(){
  
      String[] values = new String[] { "Android", "iPhone", 
"WindowsMobile","Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS 
X","Linux", "OS/2" };
        ArrayAdapter<String> adapter =
 new 
ArrayAdapter<String>(context,android.R.layout.simple_list_item_2, 
android.R.id.text2, values);
        listView.setAdapter(adapter);
    }
    public void create_list2(){
  
      String[] values = new String[] { "Android", "iPhone", 
"WindowsMobile","Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS 
X","Linux", "OS/2" };
        ArrayAdapter<String> adapter =
 new 
ArrayAdapter<String>(context,android.R.layout.simple_list_item_2, 
android.R.id.text2, values);
        listView2.setAdapter(adapter);         
    }
    public void click(View view) {        
        switch (view.getId()) {
            case R.id.wait:
                
                setContentView(R.layout.waitlay);
                //ITT SZÁLL EL.
                create_list();                
                Toast.makeText(this, "Wait",Toast.LENGTH_LONG).show();
                create_list();
            break;
            case R.id.move:                
                Toast.makeText(this, "Move",Toast.LENGTH_LONG).show();
            break;            
            
        }
    }

Logcat:

07-16 08:11:13.304: W/dalvikvm(283): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-16 08:11:13.499: E/AndroidRuntime(283): FATAL EXCEPTION: main
07-16 08:11:13.499: E/AndroidRuntime(283): java.lang.IllegalStateException: Could not execute method of the activity
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.view.View$1.onClick(View.java:2072)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.view.View.performClick(View.java:2408)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.view.View$PerformClick.run(View.java:8816)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.os.Handler.handleCallback(Handler.java:587)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.os.Handler.dispatchMessage(Handler.java:92)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.os.Looper.loop(Looper.java:123)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.app.ActivityThread.main(ActivityThread.java:4627)
07-16 08:11:13.499: E/AndroidRuntime(283):     at java.lang.reflect.Method.invokeNative(Native Method)
07-16 08:11:13.499: E/AndroidRuntime(283):     at java.lang.reflect.Method.invoke(Method.java:521)
07-16 08:11:13.499: E/AndroidRuntime(283):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-16 08:11:13.499: E/AndroidRuntime(283):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-16 08:11:13.499: E/AndroidRuntime(283):     at dalvik.system.NativeStart.main(Native Method)
07-16 08:11:13.499: E/AndroidRuntime(283): Caused by: java.lang.reflect.InvocationTargetException
07-16 08:11:13.499: E/AndroidRuntime(283):     at bupo.pack.com.BupoActivity.click(BupoActivity.java:57)
07-16 08:11:13.499: E/AndroidRuntime(283):     at java.lang.reflect.Method.invokeNative(Native Method)
07-16 08:11:13.499: E/AndroidRuntime(283):     at java.lang.reflect.Method.invoke(Method.java:521)
07-16 08:11:13.499: E/AndroidRuntime(283):     at android.view.View$1.onClick(View.java:2067)
07-16 08:11:13.499: E/AndroidRuntime(283):     ... 11 more
07-16 08:11:13.499: E/AndroidRuntime(283): Caused by: java.lang.NullPointerException
07-16 08:11:13.499: E/AndroidRuntime(283):     at bupo.pack.com.BupoActivity.create_list(BupoActivity.java:45)
07-16 08:11:13.499: E/AndroidRuntime(283):     ... 15 more