如何手动扩展和折叠expandablelistview？我知道expandGroup（），但不知道在哪里设置onClickListener（），因为这段代码的一半是在一个单独的库项目中。
ExpandableDeliveryList
package com.goosesys.dta_pta_test;
[imports removed to save space]
public class ExpandableDeliveryList<T> extends ExpandableListActivity {
private ArrayList<GooseDeliveryItem> parentItems = new ArrayList<GooseDeliveryItem>();
private ArrayList<DeliverySiteExtras> childItems = new ArrayList<DeliverySiteExtras>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// CREATE THE EXPANDABLE LIST AND SET PROPERTIES //
final ExpandableListView expandList = getExpandableListView();
expandList.setDividerHeight(0);
expandList.setGroupIndicator(null);
expandList.setClickable(false);
// LIST OF PARENTS //
setGroupParents();
// CHILDREN //
setChildData();
// CREATE ADAPTER //
GooseExpandableArrayAdapter<?> adapter = new GooseExpandableArrayAdapter<Object>(
R.layout.goose_delivery_item,
R.layout.goose_delivery_item_child,
parentItems,
childItems);
adapter.setInflater((LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE), this);
expandList.setAdapter(adapter);
expandList.setOnChildClickListener(this);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch(item.getItemId())
{
case android.R.id.home:
{
Intent intent = new Intent(this, Main.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(intent);
return true;
}
default:
{
return super.onOptionsItemSelected(item);
}
}
}
public void setGroupParents()
{
DatabaseHelper dbHelper = new DatabaseHelper(this);
List<DeliverySite> sites = new ArrayList<DeliverySite>();
sites = dbHelper.getAllSites();
GooseDeliveryItem[] deliveries = new GooseDeliveryItem[sites.size()];
for(int i=0; i<sites.size(); i++)
{
Delivery del = new Delivery();
try
{
del = dbHelper.getDeliveryByJobNo(sites.get(i).id);
}
catch(Exception e)
{
e.printStackTrace();
}
final GooseDeliveryItem gdi;
if((Double.isNaN(sites.get(i).lat)) || (Double.isNaN(sites.get(i).lng)))
{
gdi = new GooseDeliveryItem(sites.get(i).id, sites.get(i).company);
}
else
{
gdi = new GooseDeliveryItem(sites.get(i).id, sites.get(i).company, sites.get(i).lat, sites.get(i).lng);
}
if(del.getReportedFully() == 1)
{
gdi.isReportedFully = true;
}
deliveries[i] = gdi;
}
// FINALLY ADD THESE ITEMS TO THE PARENT ITEMS LIST ARRAY //
for(GooseDeliveryItem g : deliveries)
parentItems.add(g);
}
public void setChildData()
{
//DatabaseHelper dbHelper = new DatabaseHelper(this);
ArrayList<DeliverySiteExtras> extras = new ArrayList<DeliverySiteExtras>();
for(int i=0; i<parentItems.size(); i++)
{
DeliverySiteExtras dse = new DeliverySiteExtras();
extras.add(dse);
}
childItems = extras;
}
}
ArrayAdapter
package com.goosesys.gooselib.Views;
[imports removed to save space]
public class GooseExpandableArrayAdapter<Object> extends BaseExpandableListAdapter
{
private Activity activity;
private ArrayList<DeliverySiteExtras> childItems;
private LayoutInflater inflater;
ArrayList<GooseDeliveryItem> parentItems;
private DeliverySiteExtras child;
private int layoutId;
private int childLayoutId;
public GooseExpandableArrayAdapter(int layoutId, int childLayoutId, ArrayList<GooseDeliveryItem> parents, ArrayList<DeliverySiteExtras> children)
{
this.layoutId = layoutId;
this.childLayoutId = childLayoutId;
this.parentItems = (ArrayList<GooseDeliveryItem>) parents;
this.childItems = (ArrayList<DeliverySiteExtras>)children;
}
public GooseExpandableArrayAdapter(ArrayList<GooseDeliveryItem> parents, ArrayList<DeliverySiteExtras> children, int layoutId)
{
this.parentItems = parents;
this.childItems = children;
this.layoutId = layoutId;
}
public void setInflater(LayoutInflater inflater, Activity activity)
{
this.inflater = inflater;
this.activity = activity;
}
@Override
public Object getChild(int arg0, int arg1)
{
return null;
}
@Override
public long getChildId(int arg0, int arg1)
{
return 0;
}
/*
* Child view get method
* Utilise this to edit view properties at run time
*/
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent)
{
child = childItems.get(groupPosition);
if(convertView == null)
{
convertView = inflater.inflate(this.childLayoutId, null);
}
// GET ALL THE OBJECT VIEWS AND SET THEM HERE //
setGeoLocation(groupPosition, convertView);
convertView.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
}
});
return convertView;
}
@Override
public void onGroupCollapsed(int groupPosition)
{
super.onGroupCollapsed(groupPosition);
}
@Override
public void onGroupExpanded(int groupPosition)
{
super.onGroupExpanded(groupPosition);
}
@Override
public int getChildrenCount(int groupPosition)
{
return 1; //childItems.get(groupPosition);
}
@Override
public Object getGroup(int groupPosition)
{
return null;
}
@Override
public int getGroupCount()
{
return parentItems.size();
}
@Override
public long getGroupId(int arg0)
{
return 0;
}
/*
* Parent View Object get method
* Utilise this to edit view properties at run time.
*/
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
{
if(convertView == null)
{
convertView = inflater.inflate(this.layoutId, null);
}
// GET ALL OBJECT VIEWS AND SET THEM HERE -- PARENT VIEW //
TextView name = (TextView)convertView.findViewById(R.id.customerName);
name.setText(parentItems.get(groupPosition).customerText);
ImageView go = (ImageView)convertView.findViewById(R.id.moreDetails);
go.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Intent i = new Intent(activity, DeliveryJobActivity.class);
i.putExtra("obj", parentItems.get(groupPosition));
activity.startActivity(i);
}
});
return convertView;
}
@Override
public boolean hasStableIds()
{
return false;
}
@Override
public boolean isChildSelectable(int arg0, int arg1)
{
return false;
}
private void setGeoLocation(final int groupPosition, View parent)
{
GeoLocation geoLocation = new GeoLocation(activity);
final double lat = geoLocation.getLatitude();
final double lng = geoLocation.getLongitude();
// GET OUR START LOCATION //
Location startLocation = new Location("Start");
startLocation.setLatitude(lat);
startLocation.setLongitude(lng);
// GET OUR DESTINATION //
Location destination = new Location("End");
destination.setLatitude(((GooseDeliveryItem)parentItems.get(groupPosition)).latitude);
destination.setLongitude(((GooseDeliveryItem)parentItems.get(groupPosition)).longitude);
double distanceValue = startLocation.distanceTo(destination);
TextView tv = (TextView)parent.findViewById(R.id.extraHeader);
tv.setText(parentItems.get(groupPosition).customerText + " information:");
TextView ds = (TextView)parent.findViewById(R.id.deliveryDistance);
ds.setText("Distance (from location): " + String.valueOf(Math.ceil(distanceValue * GooseConsts.METERS_TO_A_MILE)) + " Mi (approx)");
ImageView img = (ImageView)parent.findViewById(R.id.directionsImage);
img.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// invoke google maps with lat / lng position
Intent navigation = new Intent(Intent.ACTION_VIEW, Uri.parse(
"http://maps.google.com/maps?saddr="
+ (lat) + "," + (lng)
+ "&daddr="
+ ((GooseDeliveryItem)parentItems.get(groupPosition)).latitude + ","
+ ((GooseDeliveryItem)parentItems.get(groupPosition)).longitude
));
activity.startActivity(navigation);
}
});
}
}
理想情况下，我的老板想要一个“+”按钮，点击该按钮会手动展开列表视图。而不是单击视图上的任何位置，它会自动执行。这可能吗？此外，设置setClickable(false)似乎没有任何效果。因为单击任何列表项时它仍会展开。我也错过了什么吗？
干杯。
答案 0 :(得分：7)
您可以添加ExpandableListView组单击Listener（“ExpandableListView :: setOnGroupClickListener”）来监视和抑制ListView组的单击事件。使用您的代码示例，这将在您创建ExpandableListView后在“ExpandableDeliveryList”模块中完成。
然后在“+”（和“ - ”）按钮单击处理程序中，您可以使用“ExpandableListView :: expandGroup（）”和“ExpandableListView :: collapseGroup”添加用于展开/折叠部分或全部ListView组的逻辑（）“方法。
您不需要从重写的“isChildSelectable（）”方法返回“false”，因为这对您要完成的操作没有任何影响（并且会阻止任何人单击/选择ListView中的子项）。 / p>
代码示例如下所示：
// CREATE THE EXPANDABLE LIST AND SET PROPERTIES //
final ExpandableListView expandList = getExpandableListView();
//...
expandList.setOnGroupClickListener(new android.widget.ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick( ExpandableListView parent,
View view,
int groupPosition,
long id) {
// some code...
// return "true" to consume the event (and prevent the Group from expanding/collapsing) / "false" to allow the Group to expand/collapse normally
return true;
}
});
手动展开和折叠ListView组：
// enumerate thru the ExpandableListView Groups
// [in this code example, a single index is used...]
int groupPosition = 0;
// expand the ListView Group/s
if (m_expandableListView.isGroupExpanded(groupPosition) == false) {
// API Level 14+ allows you to animate the Group expansion...
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
m_expandableListView.expandGroup(groupPosition, true);
}
// else just expand the Group without animation
else {
m_expandableListView.expandGroup(groupPosition);
}
}
// collapse the ListView Group/s
else {
m_expandableListView.collapseGroup(groupPosition);
}
希望这有助于。