使listView中有些条目可用，有些不可用
有时候，我们需要listView中有些条目可用，有些不可用。如何设置呢？
其实很简单，只要重写isEnabled(int position)就可以了，看下面的例子.
public class List5 extends ListActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setListAdapter(new MyListAdapter(this)); } private class MyListAdapter extends BaseAdapter { public MyListAdapter(Context context) { mContext = context; } public int getCount() { return mStrings.length; } @Override public boolean areAllItemsEnabled() { return true; } @Override public boolean isEnabled(int position) { return !mStrings[position].startsWith("-"); } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { TextView tv; if (convertView == null) { tv = (TextView) LayoutInflater.from(mContext).inflate( android.R.layout.simple_expandable_list_item_1, parent, false); } else { tv = (TextView) convertView; } tv.setText(mStrings[position]); return tv; } private Context mContext; } private String[] mStrings = { "----------", "----------", "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "----------", "Abondance", "----------", "Ackawi", "Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "----------", "Airedale", "Aisy Cendre", "----------", "Allgauer Emmentaler", "Alverca", "Ambert", "American Cheese", "Ami du Chambertin", "----------", "----------", "Anejo Enchilado", "Anneau du Vic-Bilh", "Anthoriro", "----------", "----------" };}