创建上下文菜单时在自定义的ListView点击龙 [英] Create a Context Menu when Click Long in a Custom ListView
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问题描述
我要显示快捷菜单（OnClickLong）与删除和编辑选项，我用一个自定义列表适配器创建一个自定义列表。我会后的code
SpotListFragment
包com.pap.myspots.fragments;
进口的java.util.ArrayList;
进口的java.util.HashMap;
进口的java.util.List;
进口com.pap.myspots.R;
进口com.pap.myspots.R.layout;
进口com.pap.myspots.database.DBAdapter;
进口com.pap.myspots.listView.SpotList;
进口com.pap.myspots.listView.SpotListAdapter;
进口android.annotation.Sup pressLint;
进口android.database.Cursor;
进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v4.app.ListFragment;
进口android.util.Log;
进口android.view.ContextMenu;
进口android.view.ContextMenu.ContextMenuInfo;
进口android.view.LayoutInflater;
进口android.view.MenuInflater;
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.view.ViewGroup;
进口android.widget.AdapterView;
进口android.widget.AdapterView.OnItemLongClickListener;
进口android.widget.ArrayAdapter;
进口android.widget.Button;
进口android.widget.ListView;
进口android.widget.Toast;
公共类SpotListFragment扩展片段实现OnClickListener {
字符串诺姆;
字符串地方;
按钮createToast;
名单＆LT;字符串＆GT; nomes;
名单＆LT;字符串＆GT; locais;
ListView控件的ListView;
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，
捆绑savedInstanceState）{
查看rootView = inflater.inflate（R.layout.fragment_spotlist，集装箱，假）;
DBAdapter DB =新DBAdapter（getActivity（））;
db.open（）;
光标光标= db.getAllTitles（）;
nomes =新的ArrayList＆LT;字符串＆GT;（）;
而（cursor.moveToNext（））{
字符串的uname = cursor.getString（cursor.getColumnIndex（诺姆））;
nomes.add（UNAME）;
}
光标光标2 = db.getAllTitles（）;
locais =新的ArrayList＆LT;字符串＆GT;（）;
而（cursor2.moveToNext（））{
字符串ulocal = cursor2.getString（cursor.getColumnIndex（本地））;
locais.add（ulocal）;
}
SpotListAdapter适配器=新SpotListAdapter（getActivity（），generateData（））;
从activity_main.xml // 2.获取的ListView
ListView控件=（ListView控件）rootView.findViewById（R.id.spotList）;
// 3。setListAdapter
listView.setAdapter（适配器）;
返回rootView;
}
私人的ArrayList＆LT; SpotList＆GT; generateData（）{
ArrayList的＆LT; SpotList＆GT;项目=新的ArrayList＆LT; SpotList＆GT;（）;
INT I = 0;
而（nomes.size（）I标记）{
items.add（新SpotList（新的字符串（nomes.get（I）），新的String（locais.get（I））））;
我++;
}
返回的项目;
}
@覆盖
公共无效的onClick（视图v）{
// TODO自动生成方法存根
}
//删除个别车项目
}
SpotListAdapter
包com.pap.myspots.listView;
进口的java.util.ArrayList;
进口com.pap.myspots.R;
进口android.content.Context;
进口android.view.LayoutInflater;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.ArrayAdapter;
进口android.widget.TextView;
公共类SpotListAdapter扩展ArrayAdapter＆LT; SpotList＆GT; {
私人最终上下文的背景下;
私人最终的ArrayList＆LT; SpotList＆GT; itemsArrayList;
公共SpotListAdapter（上下文的背景下，ArrayList的＆LT; SpotList＆GT; itemsArrayList）{
超（背景下，R.layout.list_row，itemsArrayList）;
this.context =背景;
this.itemsArrayList = itemsArrayList;
}
@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
// 1.创建气筒
LayoutInflater充气=（LayoutInflater）上下文
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
// 2.获取rowView从吹气
查看rowView = inflater.inflate（R.layout.list_row，父母，假）;
// 3.从rowView两个文本视图
TextView的LABELVIEW =（TextView中）rowView.findViewById（R.id.title）;
TextView的valueView =（TextView中）rowView.findViewById（R.id.place）;
// 4。设置文字的TextView
labelView.setText（itemsArrayList.get（位置）.getNome（））;
valueView.setText（itemsArrayList.get（位置）.getLocal（））;
// 5. retrn rowView
返回rowView;
}
}
SpotList（豆）
包com.pap.myspots.listView;
公共类SpotList {
公共SpotList（诺姆字符串，字符串本地）{
超（）;
this.nome =诺姆;
this.local =地方;
}
公共字符串getNome（）{
返回诺姆;
}
公共无效setNome（字符串诺姆）{
this.nome =诺姆;
}
公共字符串中的getLocal（）{
回到地方;
}
公共无效SETLOCAL（字符串本地）{
this.local =地方;
}
私人字符串诺姆;
私人字符串地方;
}
解决方案
所以首先注册您的ListView在onCreate方法的上下文菜单：
registerForContextMenu（yourListView）;
由overridig的onCreateContextMenu创建文本菜单：
@覆盖
公共无效onCreateContextMenu（文本菜单菜单，视图V，ContextMenuInfo menuInfo）
{
AdapterContextMenuInfo信息=（AdapterContextMenuInfo）menuInfo;
_listPosition = info.position;长点击的项目//获取指数
super.onCreateContextMenu（菜单，V，menuInfo）;
menu.setHeaderTitle（选择操作）; //上下文菜单标题
menu.add（0，v.getId（），0，编辑）; //加入元素的编辑
menu.add（0，v.getId（），1，删除）; //添加元素删除
}
在上下文菜单阵营点击次数：
@覆盖
公共布尔onContextItemSelected（菜单项项）
{
如果（item.getTitle（）==编辑）//编辑选择
{
//做的东西
}
否则，如果（item.getTitle（）==删除）//删除选择
{
//做的东西
}
其他
{
返回false;
}
返回true;
}
I want to show a context menu (OnClickLong)with delete and edit option, in a custom list i created with a custom list adapter. i will post the code
SpotListFragment
package com.pap.myspots.fragments;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.pap.myspots.R;
import com.pap.myspots.R.layout;
import com.pap.myspots.database.DBAdapter;
import com.pap.myspots.listView.SpotList;
import com.pap.myspots.listView.SpotListAdapter;
import android.annotation.SuppressLint;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.ListFragment;
import android.util.Log;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.MenuInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class SpotListFragment extends Fragment implements OnClickListener{
String nome;
String local;
Button createToast;
List<String> nomes ;
List<String> locais ;
ListView listView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_spotlist, container, false);
DBAdapter db = new DBAdapter(getActivity());
db.open();
Cursor cursor = db.getAllTitles();
nomes = new ArrayList<String>();
while(cursor.moveToNext()){
String uname = cursor.getString(cursor.getColumnIndex("nome"));
nomes.add(uname);
}
Cursor cursor2 = db.getAllTitles();
locais = new ArrayList<String>();
while(cursor2.moveToNext()){
String ulocal = cursor2.getString(cursor.getColumnIndex("local"));
locais.add(ulocal);
}
SpotListAdapter adapter = new SpotListAdapter(getActivity(), generateData());
// 2. Get ListView from activity_main.xml
listView = (ListView) rootView.findViewById(R.id.spotList);
// 3. setListAdapter
listView.setAdapter(adapter);
return rootView;
}
private ArrayList<SpotList> generateData(){
ArrayList<SpotList> items = new ArrayList<SpotList>();
int i = 0;
while(nomes.size()>i){
items.add(new SpotList(new String(nomes.get(i)),new String(locais.get(i))));
i++;
}
return items;
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
//Deleted individual cart items
}
SpotListAdapter
package com.pap.myspots.listView;
import java.util.ArrayList;
import com.pap.myspots.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class SpotListAdapter extends ArrayAdapter<SpotList> {
private final Context context;
private final ArrayList<SpotList> itemsArrayList;
public SpotListAdapter(Context context, ArrayList<SpotList> itemsArrayList) {
super(context, R.layout.list_row, itemsArrayList);
this.context = context;
this.itemsArrayList = itemsArrayList;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// 1. Create inflater
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// 2. Get rowView from inflater
View rowView = inflater.inflate(R.layout.list_row, parent, false);
// 3. Get the two text view from the rowView
TextView labelView = (TextView) rowView.findViewById(R.id.title);
TextView valueView = (TextView) rowView.findViewById(R.id.place);
// 4. Set the text for textView
labelView.setText(itemsArrayList.get(position).getNome());
valueView.setText(itemsArrayList.get(position).getLocal());
// 5. retrn rowView
return rowView;
}
}
SpotList(Beans)
package com.pap.myspots.listView;
public class SpotList {
public SpotList(String nome, String local) {
super();
this.nome = nome;
this.local = local;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public String getLocal() {
return local;
}
public void setLocal(String local) {
this.local = local;
}
private String nome;
private String local;
}
解决方案
So first of all register your listView for a context menu in the onCreate method:
registerForContextMenu(yourListView);
Create the contextmenu by overridig the onCreateContextMenu:
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
{
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
_listPosition = info.position; // Get Index of long-clicked item
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("Choose Action"); // Context-menu title
menu.add(0, v.getId(), 0, "Edit"); // Add element "Edit"
menu.add(0, v.getId(), 1, "Delete"); // Add element "Delete"
}
React on clicks in context-menu:
@Override
public boolean onContextItemSelected(MenuItem item)
{
if(item.getTitle() == "Edit") // "Edit" chosen
{
// Do stuff
}
else if(item.getTitle() == "Delete") // "Delete" chosen
{
// Do stuff
}
else
{
return false;
}
return true;
}
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