<>其中一个例子异常

public class ListViweActivity extends Activity {
    LinearLayout m_LinearLayout = null;
    ListView m_ListView = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        m_LinearLayout = new LinearLayout(this);
        m_LinearLayout.setOrientation(LinearLayout.VERTICAL);
        m_LinearLayout.setBackgroundColor(Color.BLACK);
        
        m_ListView = new ListView(this);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,
                                            LinearLayout.LayoutParams.WRAP_CONTENT);
        m_LinearLayout.addView(m_ListView, params);
        setContentView(m_LinearLayout);
        //获取数据库Phones的Cursor
        Cursor cur = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
        startManagingCursor(cur);
        
        ListAdapter adapter = new SimpleCursorAdapter(this,
                // 定义List中每一行的显示模板
                // 表示每一行包含两个数据项
                android.R.layout.simple_list_item_2,
                // 数据库的Cursor对象
                cur,
                // 从数据库的NAME和NUMBER两列中取数据
                new String[] { PhoneLookup.DISPLAY_NAME, PhoneLookup.NUMBER },
                // 与NAME和NUMBER对应的Views
                new int[] { android.R.id.text1, android.R.id.text2 });
       m_ListView.setAdapter(adapter);
        
    }
}