对新浪微博android客户端中ListView的实现
新浪围脖android客户端中显示围脖信息条目的ListView有这几样功能：
1、点击ListView中没有展开的条目时，会展开该条目，显示更多的详细信息，并关闭其他展开的条目。
2、点击ListView中展开的条目时，会弹出对话框，提供更多的功能选项。
因为毕设要实现类似的功能，所以就揣摩了一下，下面给出简单的示例：
假设先显示图书标题列表，点击标题后会显示图书的作者和出版社。
<LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical"><TextView android:id="@+id/list_item_1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="30dip"/><TextView android:id="@+id/list_item_2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:visibility="gone"/><TextView android:id="@+id/list_item_3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:visibility="gone"/> </LinearLayout>
public class BookListActivity extends Activity { private ListView mBooksListView; private List<HashMap<String,String>> mItems; private SimpleAdapter mAdapter; private Book mBook; /* * 保存ListView中最近一次被点击的Item的信息 */ //ListView的第一个Item的position值为0,故必须初始化mLastPosition,使其永不冲突 private int mLastPosition = -1; private View mLastView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list_1); //获取ListView mBooksListView = (ListView)findViewById(R.id.list1); mItems = new ArrayList<HashMap<String,String>>(); List<Book> mBooks = .....//获取想要显示的beans for(Book b : mBooks) {HashMap<String,String> item = new HashMap<String,String>(); item.put(Constant.ATTR_BOOK_TITLE,b.getTitle()); item.put(Constant.ATTR_BOOK_AUTHOR, b.getAuthor()); item.put(Constant.ATTR_BOOK_PUBLISHER, b.getPublisher()); mItems.add(item);} mAdapter = new SimpleAdapter(this,mItems,R.layout.list_items_1, new String[]{Constant.ATTR_BOOK_TITLE, Constant.ATTR_BOOK_AUTHOR, Constant.ATTR_BOOK_PUBLISHER}, new int[]{R.id.list_item_1, R.id.list_item_2, R.id.list_item_3}); mBooksListView.setAdapter(mAdapter); mBooksListView.setOnItemClickListener(new OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> parent, View view, int position,long id) {if(position != mLastPosition) { //如果点击的条目和上一次的不同，那么就展开本条目，关闭上次展开的条目 setVisible(view); setGone(mLastView); mLastPosition = position; mLastView = view;} else { //如果点击的条目和上一次的相同，那么就弹出对话框，提供更多功能选项 showDialog(......);} } });}/* * 让view可视 */private void setVisible(View view) { if(view == null)return; LinearLayout layout = (LinearLayout)view; layout.findViewById(R.id.list_item_2).setVisibility(View.VISIBLE); layout.findViewById(R.id.list_item_3).setVisibility(View.VISIBLE);}/* * 让view不可视 */private void setGone(View view) { if(view == null)return; LinearLayout layout = (LinearLayout)view; layout.findViewById(R.id.list_item_2).setVisibility(View.GONE); layout.findViewById(R.id.list_item_3).setVisibility(View.GONE);} }