Android ListView兩種長按彈出菜單方式

 

/**

* 知識點1：ListView item:兩種長按彈出菜單方式
* 知識點2：ListView SimpleAdapter的使用
*  知識點 3：在java代碼中創建一個ListView
*/ 

-----------------------------------------------------
Activity

代碼： 



public class ListOnLongClickActivity extends Activity { 
        private LinearLayout myListViewlayout; 
        private ListView mListView; 
        SimpleAdapter adapter; 
        public int MID; 

        // 創建一個List對象，用來存放列表項的每一行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); 
                // 創建布局參數 
                LinearLayout.LayoutParams listviewParams = new LinearLayout.LayoutParams( 
                                LinearLayout.LayoutParams.FILL_PARENT, 
                                LinearLayout.LayoutParams.FILL_PARENT); 
                // 當滑動列表上，默認顯示的黑色 
                mListView.setCacheColorHint(Color.WHITE); 
                // 將列表添加到流式布局myListViewlayout中 
                myListViewlayout.addView(mListView, listviewParams); 

                FillListData(); 

                // 列表現的單機事件 
                mListView.setOnItemClickListener(new OnItemClickListener() { 

                        @Override
                        public void onItemClick(AdapterView<?> arg0, View arg1, 
                                        int position, long id) { 
                                /* 
                                 * 點擊列表項時觸發onItemClick方法，四個參數含義分別為 
                                 * arg0：發生單擊事件的AdapterView 
                                 * arg1：AdapterView中被點擊的View  
                                 * position：當前點擊的行在adapter的下標 
                                 * id：當前點擊的行的id 
                                 */ 
                                Toast.makeText(ListOnLongClickActivity.this, 
                                                "您選擇的是" + list.get(position).get("name").toString(), 
                                                Toast.LENGTH_SHORT).show(); 
                        } 
                }); 

                /** 
                 * Item 長按方式彈出菜單多選方式1 
                 * Item 長按方式彈出菜單多選方式2 
                 * ItemOnLongClick1()與ItemOnLongClick2()不共存，按實際需要選擇 
                 */
        //        ItemOnLongClick1(); 
                ItemOnLongClick2(); 
        } 

        // 填充ListView資源 
        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是與下面onContextItemSelected配套使用的 
                mListView 
                                .setOnCreateContextMenuListener(new OnCreateContextMenuListener() { 

                                        public void onCreateContextMenu(ContextMenu menu, View v, 
                                                        ContextMenuInfo menuInfo) { 
                                                menu.add(0, 0, 0, "購買"); 
                                                menu.add(0, 1, 0, "收藏"); 
                                                menu.add(0, 2, 0, "對比"); 

                                        } 
                                }); 
        } 

        // 長按菜單響應函數 
        public boolean onContextItemSelected(MenuItem item) { 

                AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item 
                                .getMenuInfo(); 
                MID = (int) info.id;// 這里的info.id對應的就是數據庫中_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: 
                        // 刪除操作 
                        break; 

                case 2: 
                        // 刪除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("對Item進行操作") 
                                                .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("刪除")) { 
                                                                                        // 按照這種方式做刪除操作，這個if內的代碼有bug，實際代碼中按需操作 
                                                                                        list.remove(arg2); 
                                                                                        adapter = (SimpleAdapter) mListView 
                                                                                                        .getAdapter(); 
                                                                                        if (!adapter.isEmpty()) { 
                                                                                                adapter.notifyDataSetChanged(); // 實現數據的實時刷新 
                                                                                        } 
                                                                                } 
                                                                        } 
                                                                }) 
                                                .setNegativeButton("取消", 
                                                                new DialogInterface.OnClickListener() { 
                                                                        public void onClick(DialogInterface dialog, 
                                                                                        int which) { 
                                                                                // TODO Auto-generated method stub 

                                                                        } 
                                                                }).show(); 
                                return true; 
                        } 
                }); 

        } 
}




-----------
listviewrow.xml

代碼片段， <?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>