Android 单击可展开列表视图子项打开活动的步骤
我想在单击可展开列表视图的子级时打开一个新活动。我尝试了以下代码,但它既不起作用,也没有出现任何错误。Android 单击可展开列表视图子项打开活动的步骤,android,expandablelistview,Android,Expandablelistview,我想在单击可展开列表视图的子级时打开一个新活动。我尝试了以下代码,但它既不起作用,也没有出现任何错误。 Exp_list.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childP
Exp_list.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
Intent mum;
if(groupPosition==0){
mum = new Intent(getApplicationContext(), Example.class);
startActivity(mum);
}
return true;
}
});
下面是适配器类的代码
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> Travels_Header;
private HashMap<String, List<String>> Details_Child;
public ExpandableListAdapter(Context context, List<String> Travels_Header, HashMap<String, List<String>> Details_Child) {
this._context = context;
this.Travels_Header = Travels_Header;
this.Details_Child = Details_Child;
}
@Override
public Object getChild(int parent, int child) {
// TODO Auto-generated method stub
return this.Details_Child.get(this.Travels_Header.get(parent)).get(child);
}
@Override
public long getChildId(int parent, int child) {
// TODO Auto-generated method stub
return child;
}
@Override
public View getChildView(int parent, int child, boolean lastChild, View convertView,
ViewGroup parentView) {
// TODO Auto-generated method stub
final String childText = (String) getChild(parent, child);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_view_child, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.textView1);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int parent) {
// TODO Auto-generated method stub
return this.Details_Child.get(this.Travels_Header.get(parent)).size();
}
@Override
public Object getGroup(int parent) {
// TODO Auto-generated method stub
return this.Travels_Header.get(parent);
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return this.Travels_Header.size();
}
@Override
public long getGroupId(int parent) {
// TODO Auto-generated method stub
return parent;
}
@Override
public View getGroupView(int parent, boolean isExpanded, View convertView, ViewGroup parentView) {
// TODO Auto-generated method stub
String headerTitle = (String) getGroup(parent);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_view_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.textView1);
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 parent, int child) {
// TODO Auto-generated method stub
return true;
}
}
公共类ExpandableListAdapter扩展了BaseExpandableListAdapter{
私人语境(private Context)(私人语境);;
私有列表头;
私有HashMap详细信息\u子级;
公共ExpandableListAdapter(上下文上下文、列表标题、HashMap详细信息子项){
这._context=context;
this.Travels\u Header=Travels\u Header;
this.Details\u Child=Details\u Child;
}
@凌驾
公共对象getChild(int父对象,int子对象){
//TODO自动生成的方法存根
返回this.Details\u Child.get(this.Travels\u Header.get(parent)).get(Child);
}
@凌驾
公共长getChildId(int父级,int子级){
//TODO自动生成的方法存根
返回儿童;
}
@凌驾
公共视图getChildView(int父视图、int子视图、布尔lastChild、视图转换视图、,
视图组(父视图){
//TODO自动生成的方法存根
最后一个字符串childText=(字符串)getChild(父,子);
if(convertView==null){
LayoutInflater infalInflater=(LayoutInflater)this.\u上下文
.getSystemService(上下文布局\充气机\服务);
convertView=infalInflater.充气(R.layout.list\u view\u child,空);
}
TextView txtListChild=(TextView)convertView
.findViewById(R.id.textView1);
setText(childText);
返回视图;
}
@凌驾
公共整数getChildrenCount(整数父项){
//TODO自动生成的方法存根
返回this.Details_Child.get(this.Travels_Header.get(parent)).size();
}
@凌驾
公共对象getGroup(int父对象){
//TODO自动生成的方法存根
返回此.u头.get(父级);
}
@凌驾
public int getGroupCount(){
//TODO自动生成的方法存根
返回此.Travels_Header.size();
}
@凌驾
公共长getGroupId(int父级){
//TODO自动生成的方法存根
返回父母;
}
@凌驾
公共视图getGroupView(int父视图、布尔isExpanded、视图转换视图、视图组父视图){
//TODO自动生成的方法存根
字符串头文件=(字符串)getGroup(父级);
if(convertView==null){
LayoutInflater infalInflater=(LayoutInflater)this.\u上下文
.getSystemService(上下文布局\充气机\服务);
convertView=infalInflater.充气(R.layout.list\u view\u group,空);
}
TextView lblistheader=(TextView)convertView
.findViewById(R.id.textView1);
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父级,int子级){
//TODO自动生成的方法存根
返回true;
}
}
尝试了各种方法来执行此代码。尝试此代码我只对您的代码进行了更改
@Override
public View getChildView(int parent, int child, boolean lastChild, View convertView,
ViewGroup parentView) {
// TODO Auto-generated method stub
final String childText = (String) getChild(parent, child);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_view_child, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.textView1);
txtListChild.setText(childText);
//convertview listener
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
//parent position
if(parent==0){
//child positon
if(child==0){
Intent i = new Intent(context, activity.class);
in.addFlags(Intent.FLAF_ACTIVITY_NEW_TASK);
startActivity(i);
}
}
}
});
return convertView;
}
将日志放入onChildClick并在其中打印groupPosition值。在此处添加这些日志也请在convertview上单击Listenr,然后从那里开始活动,然后重试。@SurenderKumar您可以发布相同的代码吗..您的代码没有帮助。。当您希望在组单击或子单击时打开新活动时,它不是打开另一个活动。?我想在子单击时打开活动确定…当您按下子单击时,首先检查位置是否正确,方法是使用convertview中的登录代码,如LOG.e(“父位置”,“父位置”);,与儿童位置相同。您好,欢迎来到SO。给你的答案加上一点注释会使它更好。请你解释一下,再加上一些解释好吗?非常感谢。
Exp_list.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
switch (groupPosition) { // the First you must know the group position
case 0: // Here your Group position the first Group
switch (childPosition) {
case 7: // Here your Child position
startActivity(new Intent(getApplicationContext(), Example.class));
break; // this break for Child
}
break; // this break for Group
case 1: // again here your Group position the Second Group
switch (childPosition) {
case 9: // again here your Child position
startActivity(new Intent(getApplicationContext(), Example.class));
break;
}
break;
case 2:
switch (childPosition) {
case 9:
startActivity(new Intent(getApplicationContext(), Example.class));
break;
}
break;
}
return false;
}
});