/** * 知识点1：ListView item:两种长按弹出菜单方式 * 知识点2：ListView SimpleAdapter的使用 * 知识点 3：在java代码中创建一个ListView */ public class ListOnLongClickActivity extends Activity {         private LinearLayout myListViewlayout;         private ListView mListView;         SimpleAdapter adapter;         public int MID;         // 创建一个List对象，用来存放列表项的每一行map信息         List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();         @Override         public void onCreate(Bundle savedInstanceState) {                 super.onCreate(savedInstanceState);                 setContentView(R.layout.main);                 myListViewlayout = (LinearLayout) findViewById(R.id.myListViewlayout);                 mListView = new ListView(this);                 // 创建布局参数                 LinearLayout.LayoutParams listviewParams = new LinearLayout.LayoutParams(                                 LinearLayout.LayoutParams.FILL_PARENT,                                 LinearLayout.LayoutParams.FILL_PARENT);                 // 当滑动列表上，默认显示的黑色                 mListView.setCacheColorHint(Color.WHITE);                 // 将列表添加到流式布局myListViewlayout中                 myListViewlayout.addView(mListView, listviewParams);                 FillListData();                 // 列表现的单机事件                 mListView.setOnItemClickListener(new OnItemClickListener() {                         @Override                         public void onItemClick(AdapterView<?> arg0, View arg1,                                         int position, long id) {                                 /*                                  * 点击列表项时触发onItemClick方法，四个参数含义分别为                                  * arg0：发生单击事件的AdapterView                                  * arg1：AdapterView中被点击的View                                   * position：当前点击的行在adapter的下标                                  * id：当前点击的行的id                                  */                                 Toast.makeText(ListOnLongClickActivity.this,                                                 "您选择的是" + list.get(position).get("name").toString(),                                                 Toast.LENGTH_SHORT).show();                         }                 });                 /**                  * Item 长按方式弹出菜单多选方式1                  * Item 长按方式弹出菜单多选方式2                  * ItemOnLongClick1()与ItemOnLongClick2()不共存，按实际需要选择                  */         //        ItemOnLongClick1();                 ItemOnLongClick2();         }         // 填充ListView资源         private void FillListData() {                 adapter = new SimpleAdapter(ListOnLongClickActivity.this,                                 getListData(), R.layout.listviewrow, new String[] { "name",                                                 "price" }, new int[] { R.id.tv_name, R.id.tv_price });                 mListView.setAdapter(adapter);         }         private List<Map<String, Object>> getListData() {                 Map<String, Object> _map = new HashMap<String, Object>();                 _map.put("name", "小米");                 _map.put("price", "2350元");                 list.add(_map);                 _map = new HashMap<String, Object>();                 _map.put("name", "HTC G18");                 _map.put("price", "3340元");                 list.add(_map);                 _map = new HashMap<String, Object>();                 _map.put("name", "iphone 5");                 _map.put("price", "5450元");                 list.add(_map);                 _map = new HashMap<String, Object>();                 _map.put("name", "iPhone 4S");                 _map.put("price", "4650元");                 list.add(_map);                 _map = new HashMap<String, Object>();                 _map.put("name", "MOTO ME525");                 _map.put("price", "1345元");                 list.add(_map);                 return list;         }         private void ItemOnLongClick1() { //注：setOnCreateContextMenuListener是与下面onContextItemSelected配套使用的                 mListView                                 .setOnCreateContextMenuListener(new OnCreateContextMenuListener() {                                         public void onCreateContextMenu(ContextMenu menu, View v,                                                         ContextMenuInfo menuInfo) {                                                 menu.add(0, 0, 0, "购买");                                                 menu.add(0, 1, 0, "收藏");                                                 menu.add(0, 2, 0, "对比");                                         }                                 });         }         // 长按菜单响应函数         public boolean onContextItemSelected(MenuItem item) {                 AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item                                 .getMenuInfo();                 MID = (int) info.id;// 这里的info.id对应的就是数据库中_id的值                 switch (item.getItemId()) {                 case 0:                         // 添加操作                         Toast.makeText(ListOnLongClickActivity.this,                                         "添加",                                         Toast.LENGTH_SHORT).show();                         break;                 case 1:                         // 删除操作                         break;                 case 2:                         // 删除ALL操作                         break;                 default:                         break;                 }                 return super.onContextItemSelected(item);         }         private void ItemOnLongClick2() {                 mListView.setOnItemLongClickListener(new OnItemLongClickListener() {                         @Override                         public boolean onItemLongClick(AdapterView<?> arg0, View arg1,                                         final int arg2, long arg3) {                                 list.remove(arg2);                                 new AlertDialog.Builder(ListOnLongClickActivity.this)                                                 .setTitle("对Item进行操作")                                                 .setItems(R.array.arrcontent,                                                                 new DialogInterface.OnClickListener() {                                                                         public void onClick(DialogInterface dialog,                                                                                         int which) {                                                                                 String[] PK = getResources()                                                                                                 .getStringArray(                                                                                                                 R.array.arrcontent);                                                                                 Toast.makeText(                                                                                                 ListOnLongClickActivity.this,                                                                                                 PK[which], Toast.LENGTH_LONG)                                                                                                 .show();                                                                                 if (PK[which].equals("删除")) {                                                                                         // 按照这种方式做删除操作，这个if内的代码有bug，实际代码中按需操作                                                                                         list.remove(arg2);                                                                                         adapter = (SimpleAdapter) mListView                                                                                                         .getAdapter();                                                                                         if (!adapter.isEmpty()) {                                                                                                 adapter.notifyDataSetChanged(); // 实现数据的实时刷新                                                                                         }                                                                                 }                                                                         }                                                                 })                                                 .setNegativeButton("取消",                                                                 new DialogInterface.OnClickListener() {                                                                         public void onClick(DialogInterface dialog,                                                                                         int which) {                                                                                 // TODO Auto-generated method stub                                                                         }                                                                 }).show();                                 return true;                         }                 });         } }   ----------- listviewrow.xml 代码片段， <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@drawable/listviewbg"     android:orientation="vertical" >     <TextView         android:id="@+id/tv_name"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:textColor="@android:color/black" />     <TextView         android:id="@+id/tv_price"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:textColor="@android:color/black" /> </LinearLayout>