Android ListView长按弹出菜单二种实现方式示例

* 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>