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
*/
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Activity
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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;
}
});
}
}
listviewrow.xml
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