Android 如何将复选框添加到可展开列表中的子项
我有一个可扩展的listview,我想在子项中添加复选框,我如何才能做到这一点。下面是我的工作代码。以前有人做过这个吗。如果是,您能告诉我需要在代码中添加哪些更改吗 MainActivity.javaAndroid 如何将复选框添加到可展开列表中的子项,android,Android,我有一个可扩展的listview,我想在子项中添加复选框,我如何才能做到这一点。下面是我的工作代码。以前有人做过这个吗。如果是,您能告诉我需要在代码中添加哪些更改吗 MainActivity.java import java.util.ArrayList; import java.util.HashMap; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.vi
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.Toast;
public class MainActivity extends Activity {
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get the listview
expListView = (ExpandableListView) findViewById(R.id.lvExp);
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// Listview Group click listener
expListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
// Toast.makeText(getApplicationContext(),
// "Group Clicked " + listDataHeader.get(groupPosition),
// Toast.LENGTH_SHORT).show();
return false;
}
});
// Listview Group expanded listener
expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition) + " Expanded",
Toast.LENGTH_SHORT).show();
}
});
// Listview Group collasped listener
expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition) + " Collapsed",
Toast.LENGTH_SHORT).show();
}
});
// Listview on child click listener
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
Toast.makeText(
getApplicationContext(),
listDataHeader.get(groupPosition)
+ " : "
+ listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition), Toast.LENGTH_SHORT)
.show();
return false;
}
});
}
/*
* Preparing the list data
*/
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("ABCD");
listDataHeader.add("DEFG");
listDataHeader.add("HIG");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("KLM");
top250.add("MNO");
top250.add("PQR");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("KLM");
nowShowing.add("MNO");
nowShowing.add("PQR");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("KLM");
comingSoon.add("MNO");
comingSoon.add("PQR");
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
}
import java.util.ArrayList;
导入java.util.HashMap;
导入java.util.List;
导入android.app.Activity;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.ExpandableListView;
导入android.widget.ExpandableListView.OnChildClickListener;
导入android.widget.ExpandableListView.OnGroupClickListener;
导入android.widget.ExpandableListView.OnGroupCollapseListener;
导入android.widget.ExpandableListView.OnGroupExpandListener;
导入android.widget.Toast;
公共类MainActivity扩展了活动{
可扩展列表适配器;
ExpandableListView解释视图;
列表列表数据头;
HashMapListDataChild;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取列表视图
expListView=(ExpandableListView)findViewById(R.id.lvExp);
//准备列表数据
prepareListData();
listAdapter=新的ExpandableListAdapter(此,listDataHeader,listDataChild);
//设置列表适配器
expListView.setAdapter(listAdapter);
//Listview组单击侦听器
expListView.setOnGroupClickListener(新OnGroupClickListener(){
@凌驾
公共布尔值onGroupClick(ExpandableListView父视图,视图v,
int groupPosition,长id){
//Toast.makeText(getApplicationContext(),
//“组单击”+listDataHeader.get(groupPosition),
//吐司。长度(短)。show();
返回false;
}
});
//Listview组扩展侦听器
expListView.setOnGroupExpandListener(新的OnGroupExpandListener(){
@凌驾
public void onGroupExpand(int groupPosition){
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition)+“Expanded”,
吐司。长度(短)。show();
}
});
//Listview组压缩侦听器
expListView.setOnGroupCollapseListener(新OnGroupCollapseListener(){
@凌驾
公共void-onGroupCollapse(int-groupPosition){
Toast.makeText(getApplicationContext(),
listDataHeader.get(groupPosition)+“折叠”,
吐司。长度(短)。show();
}
});
//子单击侦听器上的Listview
setOnChildClickListener(新的OnChildClickListener(){
@凌驾
公共布尔onChildClick(ExpandableListView父视图,视图v,
int groupPosition、int childPosition、long id){
//TODO自动生成的方法存根
Toast.makeText(
getApplicationContext(),
listDataHeader.get(groupPosition)
+ " : "
+listDataChild.get(
listDataHeader.get(groupPosition)).get(
儿童位置),吐司。长度(短)
.show();
返回false;
}
});
}
/*
*准备列表数据
*/
私有void prepareListData(){
listDataHeader=新的ArrayList();
listDataChild=newHashMap();
//添加子数据
添加(“ABCD”);
添加(“DEFG”);
添加(“HIG”);
//添加子数据
List top250=新的ArrayList();
top250.添加(“荷兰皇家航空”);
top250.添加(“MNO”);
top250.添加(“PQR”);
List nowShowing=新建ArrayList();
现在显示。添加(“荷兰皇家航空”);
现在显示。添加(“MNO”);
新增(“PQR”);
List comingSoon=新建ArrayList();
即将到来。添加(“荷航”);
即将到来。添加(“MNO”);
即将发布。添加(“PQR”);
listDataChild.put(listDataHeader.get(0),top250);//头,子数据
listDataChild.put(listDataHeader.get(1),现在显示);
listDataChild.put(listDataHeader.get(2),即将出现);
}
}
ExpandableListAdapter.java
import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
import java.util.HashMap;
导入java.util.List;
导入android.content.Context;
导入android.graphics.Typeface;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.BaseExpandableListAdapter;
导入android.widget.TextView;
公共类ExpandableListAdapter扩展了BaseExpandableListAdapter{
私人语境(private Context)(私人语境);;
私有列表_listDataHeader;//头标题
//标题标题、子标题格式的子数据
私有HashMap_listDataChild;
公共ExpandableListAdapter(上下文、列表listDataHeader、,
HashMap listChildData){
这._context=context;
这。_listDataHeader=listDataHeader;
这。_listDataChild=listChildData;
}
@凌驾
公共对象getChild(int-groupPosition、int-ChildPosition){
返回此。_listDataChild.get(此。_listDataHeader.get(groupPosition))
.get(childpositionon);
}
@凌驾
公共长getChildId(int-groupPosition,int-childPosition){
返回子位置;
}
@凌驾
公共视图getChildView(int groupPosition,final int childPosition,
布尔值isLastChild、视图转换视图、视图组父级){
最终字符串childText=(字符串)getChild(groupPosition,childPosition);
if(convertView==null){
LayoutInflater infalInflater=(layou
<?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="55dip"
android:orientation="vertical" >
<TextView
android:id="@+id/lblListItem"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="17dip"
android:paddingTop="5dp"
android:paddingBottom="5dp"
android:textColor="#000000"
android:paddingLeft="15dip"/>
</LinearLayout>