Android ListView两种长按弹出菜单方式

/*** @author xianglong guo 2012-05-17 22:15 * 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*/ -----------------------------------------------------Activity?代码片段，双击复制packageorg.gxl.com; publicclass ListOnLongClickActivity extendsActivity {        privateLinearLayout myListViewlayout;        privateListView mListView;        SimpleAdapter adapter;        publicint 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 = newArrayList<Map<String, Object>>();         @Override        publicvoid onCreate(Bundle savedInstanceState) {                super.onCreate(savedInstanceState);                setContentView(R.layout.main);                 myListViewlayout = (LinearLayout) findViewById(R.id.myListViewlayout);                mListView = newListView(this);                // 创建布局参数                LinearLayout.LayoutParams listviewParams = newLinearLayout.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(newOnItemClickListener() {                         @Override                        publicvoid onItemClick(AdapterView<?> arg0, View arg1,                                        intposition, longid) {                                /*                                 * 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        privatevoid FillListData() {                 adapter = newSimpleAdapter(ListOnLongClickActivity.this,                                getListData(), R.layout.listviewrow, newString[] { "name",                                                "price"}, newint[] { R.id.tv_name, R.id.tv_price });                mListView.setAdapter(adapter);        }         privateList<Map<String, Object>> getListData() {                 Map<String, Object> _map = newHashMap<String, Object>();                _map.put("name","MOTO ME865");                _map.put("price","2350元");                list.add(_map);                 _map = newHashMap<String, Object>();                _map.put("name","HTC G18");                _map.put("price","3340元");                list.add(_map);                 _map = newHashMap<String, Object>();                _map.put("name","MOTO XT928");                _map.put("price","5450元");                list.add(_map);                 _map = newHashMap<String, Object>();                _map.put("name","iPhone 4S");                _map.put("price","4650元");                list.add(_map);                 _map = newHashMap<String, Object>();                _map.put("name","MOTO ME525");                _map.put("price","1345元");                list.add(_map);                returnlist;         }         privatevoid ItemOnLongClick1() {//注：setOnCreateContextMenuListener是与下面onContextItemSelected配套使用的                mListView                                .setOnCreateContextMenuListener(newOnCreateContextMenuListener() {                                         publicvoid onCreateContextMenu(ContextMenu menu, View v,                                                        ContextMenuInfo menuInfo) {                                                menu.add(0,0,0,"添加");                                                menu.add(0,1,0,"删除");                                                menu.add(0,2,0,"删除ALL");                                         }                                });        }         // 长按菜单响应函数        publicboolean 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()) {                case0:                        // 添加操作                        Toast.makeText(ListOnLongClickActivity.this,                                        "添加",                                        Toast.LENGTH_SHORT).show();                        break;                 case1:                        // 删除操作                        break;                 case2:                        // 删除ALL操作                        break;                 default:                        break;                }                 returnsuper.onContextItemSelected(item);         }         privatevoid ItemOnLongClick2() {                mListView.setOnItemLongClickListener(newOnItemLongClickListener() {                         @Override                        publicboolean onItemLongClick(AdapterView<?> arg0, View arg1,                                        finalint arg2, longarg3) {                                list.remove(arg2);                                newAlertDialog.Builder(ListOnLongClickActivity.this)                                                .setTitle("对Item进行操作")                                                .setItems(R.array.arrcontent,                                                                newDialogInterface.OnClickListener() {                                                                        publicvoid onClick(DialogInterface dialog,                                                                                       intwhich) {                                                                                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",                                                                newDialogInterface.OnClickListener() {                                                                        publicvoid onClick(DialogInterface dialog,                                                                                       intwhich) {                                                                                // TODO Auto-generated method stub                                                                         }                                                                }).show();                                returntrue;                        }                });         }}

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listviewrow.xml

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代码片段，双击复制

<?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>

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有图有真相：

工程代码：


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