详解Android应用中ListView列表选项栏的编写方法

public class MultipleItemsList extends ListActivity {
 
  private MyCustomAdapter mAdapter;
 
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mAdapter = new MyCustomAdapter();
    for (int i = 0; i < 50; i++) {
      mAdapter.addItem("item " + i);
    }
    setListAdapter(mAdapter);
  }
 
  private class MyCustomAdapter extends BaseAdapter {
 
    private ArrayList mData = new ArrayList();
    private LayoutInflater mInflater;
 
    public MyCustomAdapter() {
      mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
 
    public void addItem(final String item) {
      mData.add(item);
      notifyDataSetChanged();
    }
 
    @Override
    public int getCount() {
      return mData.size();
    }
 
    @Override
    public String getItem(int position) {
      return mData.get(position);
    }
 
    @Override
    public long getItemId(int position) {
      return position;
    }
 
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      System.out.println("getView " + position + " " + convertView);
      ViewHolder holder = null;
      if (convertView == null) {
        convertView = mInflater.inflate(R.layout.item1, null);
        holder = new ViewHolder();
        holder.textView = (TextView)convertView.findViewById(R.id.text);
        convertView.setTag(holder);
      } else {
        holder = (ViewHolder)convertView.getTag();
      }
      holder.textView.setText(mData.get(position));
      return convertView;
    }
 
  }
 
  public static class ViewHolder {
    public TextView textView;
  }
}

mListView = (ListView)findViewById(R.id.listview); 
mListView.setCacheColorHint(0); 
mListView.setItemsCanFocus(false); 
mListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
  Data data = mDataList.get(position); 
 
  if (convertView == null){ 
    convertView = mInflater.inflate(R.layout.xxxx, null); 
  } 
 
  TextView nameView = (TextView)convertView.findViewById(R.id.name); 
  nameView.setText(data.FullName); 
 
  ImageView checkView = (ImageView)convertView.findViewById(R.id.check_view); 
  if (mListView.getAdapter() != null){ 
    SparseBooleanArray checkedArray = mListView.getCheckedItemPositions(); 
    if (0 <= position && position < checkedArray.size()){ 
      if (checkedArray.valueAt(position)){ 
        checkView.setImageResource(R.drawable.checkbox_selected); 
      } 
      else{ 
        checkView.setImageResource(R.drawable.checkbox_unselected); 
      } 
    } 
  } 
 
  return convertView; 
} 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  > 
  <TextView  
    android:id="@+id/name" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textColor="@color/black" 
    android:layout_marginLeft="10dip" 
    android:gravity="center_vertical" 
    /> 
  <ImageView  
    android:id="@+id/check_view" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_marginRight="10dip" 
    android:layout_centerVertical="true" 
    android:background="@drawable/checkbox_unselected" 
    /> 
</RelativeLayout>