* 知識(shí)點(diǎn)1：ListView item:兩種長(zhǎng)按彈出菜單方式
* 知識(shí)點(diǎn)2：ListView SimpleAdapter的使用
* 知識(shí)點(diǎn) 3：在java代碼中創(chuàng)建一個(gè)ListView
*/
public class ListOnLongClickActivity extends Activity {
private LinearLayout myListViewlayout;
private ListView mListView;
SimpleAdapter adapter;
public int MID;
// 創(chuàng)建一個(gè)List對(duì)象，用來(lái)存放列表項(xiàng)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(chuàng)建布局參數(shù)
LinearLayout.LayoutParams listviewParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT);
// 當(dāng)滑動(dòng)列表上，默認(rèn)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(xiàn)的單機(jī)事件
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long id) {
/*
* 點(diǎn)擊列表項(xiàng)時(shí)觸發(fā)onItemClick方法，四個(gè)參數(shù)含義分別為
* arg0：發(fā)生單擊事件的AdapterView
* arg1：AdapterView中被點(diǎn)擊的View
* position：當(dāng)前點(diǎn)擊的行在adapter的下標(biāo)
* id：當(dāng)前點(diǎn)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(zhǎng)按方式彈出菜單多選方式1
* Item 長(zhǎng)按方式彈出菜單多選方式2
* ItemOnLongClick1()與ItemOnLongClick2()不共存，按實(shí)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(gòu)買");
menu.add(0, 1, 0, "收藏");
menu.add(0, 2, 0, "對(duì)比");
}
});
}
// 長(zhǎng)按菜單響應(yīng)函數(shù)
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
.getMenuInfo();
MID = (int) info.id;// 這里的info.id對(duì)應(yīng)的就是數(shù)據(jù)庫(kù)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(duì)Item進(jìn)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(gè)if內(nèi)的代碼有bug，實(shí)際代碼中按需操作
list.remove(arg2);
adapter = (SimpleAdapter) mListView
.getAdapter();
if (!adapter.isEmpty()) {
adapter.notifyDataSetChanged(); // 實(shí)現(xiàn)數(shù)據(jù)的實(shí)時(shí)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>
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