Java 单击后如何从expandablelistview的列表中删除子项?
所以我有一个可扩展的列表视图。在我单击了子项之后,它将从mysql表中删除数据。从表中删除数据后,我希望将其从列表中删除 我尝试使用remove(),但仍然不起作用。这是我的密码Java 单击后如何从expandablelistview的列表中删除子项?,java,android,expandablelistview,Java,Android,Expandablelistview,所以我有一个可扩展的列表视图。在我单击了子项之后,它将从mysql表中删除数据。从表中删除数据后,我希望将其从列表中删除 我尝试使用remove(),但仍然不起作用。这是我的密码 exKonsumsi = (ExpandableListView) findViewById(R.id.EVkonsumsi_user); exKonsumsi.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS); p
exKonsumsi = (ExpandableListView) findViewById(R.id.EVkonsumsi_user);
exKonsumsi.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
prepareListMenuPagi();
exKonsumsiAdapter = new com.ta.helper.ExpandableListAdapterKonsumsi(
this, listDataHeaderDaftarAwal, listDataChildDaftarAwal);
exKonsumsi.setAdapter(exKonsumsiAdapter);
exKonsumsi.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
group = groupPosition;
child = childPosition;
String namaMakanan = listDataChildDaftarAwal.get(
listDataHeaderDaftarAwal.get(groupPosition)).get(
childPosition);
Toast.makeText(getApplicationContext(), namaMakanan + " " + "sudah dihapus" , Toast.LENGTH_LONG) .show();
try {
String nama = URLEncoder.encode(username, "utf-8");
System.out.println(username);
String namatoEn = URLEncoder.encode(namaMakanan, "utf-8");
url += "?" + "&nama=" + nama + "&namatoEn=" + namatoEn ;
getRequest(url);
}
catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
listDataChildDaftarAwal.remove(namaMakanan);
return true;
}
});
适配器:
public class ExpandableListAdapterKonsumsi extends BaseExpandableListAdapter {
public static int takaran = 0;
private Context context;
private List<String> listDataHeader; // judul header
private HashMap<String, List<String>> listDataChild; // child data dengan
// format judul
// header, judul
// child
public ExpandableListAdapterKonsumsi(Context context,
List<String> listDataHeader,
HashMap<String, List<String>> listDataChild) {
super();
this.context = context;
this.listDataHeader = listDataHeader;
this.listDataChild = listDataChild;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return this.listDataChild.get(this.listDataHeader.get(groupPosition))
.get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(
R.layout.konsumsi_user_expand_listchild, null);
}
CheckedTextView listChild = (CheckedTextView) convertView
.findViewById(R.id.lblListItemKonsumsi);
listChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return this.listDataChild.get(this.listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return this.listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return this.listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(
R.layout.daftar_akun_expand_listgroup, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
公共类ExpandableListAdapter Konsumsi扩展了BaseExpandableListAdapter{
公共静态int takaran=0;
私人语境;
私有列表listDataHeader;//judul头
私有HashMap listDataChild;//子数据dengan
//格式朱杜尔
//朱杜尔头球
//孩子
公共可扩展列表适配器Konsumsi(上下文,
列表listDataHeader,
HashMap listDataChild){
超级();
this.context=上下文;
this.listDataHeader=listDataHeader;
this.listDataChild=listDataChild;
}
@凌驾
公共对象getChild(int-groupPosition,int-childPosition){
//TODO自动生成的方法存根
返回this.listDataChild.get(this.listDataHeader.get(groupPosition))
.get(儿童位置);
}
@凌驾
公共长getChildId(int-groupPosition,int-childPosition){
//TODO自动生成的方法存根
返回子位置;
}
@凌驾
公共视图getChildView(int-groupPosition、int-childPosition、,
布尔值isLastChild、视图转换视图、视图组父级){
//TODO自动生成的方法存根
最终字符串childText=(字符串)getChild(groupPosition,childPosition);
if(convertView==null){
LayoutInflater充气器=(LayoutInflater)this.context
.getSystemService(上下文布局\充气机\服务);
convertView=充气机。充气(
R.layout.konsumsi_user_expand_listchild,null);
}
CheckedTextView listChild=(CheckedTextView)convertView
.findviewbyd(R.id.lblListItemKonsumsi);
setText(childText);
返回视图;
}
@凌驾
公共整数getChildrenCount(整数组位置){
//TODO自动生成的方法存根
返回this.listDataChild.get(this.listDataHeader.get(groupPosition))
.size();
}
@凌驾
公共对象getGroup(int-groupPosition){
//TODO自动生成的方法存根
返回此.listDataHeader.get(groupPosition);
}
@凌驾
public int getGroupCount(){
//TODO自动生成的方法存根
返回此.listDataHeader.size();
}
@凌驾
公共长getGroupId(int-groupPosition){
//TODO自动生成的方法存根
返回组位置;
}
@凌驾
公共视图getGroupView(int-groupPosition,布尔值isExpanded,
视图(视图、视图组父级){
//TODO自动生成的方法存根
字符串头文件=(字符串)getGroup(groupPosition);
if(convertView==null){
LayoutInflater infalInflater=(LayoutInflater)this.context
.getSystemService(上下文布局\充气机\服务);
convertView=infalInflater.充气(
R.layout.daftar_akun_expand_listgroup,null);
}
TextView lblistheader=(TextView)convertView
.findviewbyd(R.id.lblistheader);
lblListHeader.setTypeface(null,Typeface.BOLD);
lblListHeader.setText(标题);
返回视图;
}
@凌驾
公共布尔表ID(){
//TODO自动生成的方法存根
返回false;
}
@凌驾
公共布尔值isChildSelectable(int-groupPosition,int-childPosition){
//TODO自动生成的方法存根
返回true;
}
}
任何帮助都将不胜感激。谢谢您必须删除与listview项目相关的数据,例如删除
listDataChild
中的项目之一,并调用适配器。notifydatasetchanged
通知listview数据已更改,然后listview将刷新视图以与数据保持同步