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Trying to use addHeaderView() and addFooterView() for a ListView . If I try to use a View that I've predefined in XML for either the header or footer, I get a null pointer exception. However, if I dynamically create a View using code, it works fine... // This doesn't work... nullPointerException ListView lv = (ListView) findViewById(R.id.my_list_view); TextView header = (TextView) findViewById(R.id.my_header); lv.addHeaderView(header); // This works fine ListView lv = (ListView) findViewById(R.id.my_list_view); TextView header = new TextView(this); TextView.setHeight(30); TextView.setText("my header text!"); lv.addHeaderView(header); My stack trace: Caused by: java.lang.NullPointerException at android.widget.ListView.clearRecycledState(ListView.java:522) at android.widget.ListView.resetList(ListView.java:508) at android.widget.ListView.setAdapter(ListView.java:440) at com.company.myapp.MyActivity.refreshList(MyActivity.java:85) at com.company.myapp.MyActivity.onCreate(MyActivity.java:37) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) ... 11 more Any clues?

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