Expand all children in expandable list view

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I would like to expand all children while the expandable list view is populated. Currently my code looks like this:

ExpandableListView listView = (ExpandableListView) findViewById(R.id.view);
int count = viewAdapted.getGroupCount();
for (int position = 1; position <= count; position++)
    listView.expandGroup(position - 1);

which is pretty ugly. Is there a nicer way to do this?


You can expand it in getGroupView in your custom adapter:

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    View v = super.getGroupView(groupPosition, isExpanded, convertView, parent);
    ExpandableListView mExpandableListView = (ExpandableListView) parent;
    mExpandableListView.expandGroup(groupPosition);
    return v;
}

Gluck!

A way to expand all groups by default? · Issue #281 · h6ah4i/android , Right now I end up expanding each group manually. Is there It should just expand / collapse based on what the adapter says. should not take care about groups/children because RecyclerView can only manage a flat list. I would like to expand all children while the expandable list view is populated. Currently my code looks like this: ExpandableListView listView = (ExpandableListView) findViewById(R.id.view); int count = viewAdapted.getGroupCount(); for (int position = 1; position <= count; position++) listView.expandGroup(position - 1);


putting this code on your adapter will make the expandlist to stay open, and disables its closing function.

ExpandableListView mExpandableListView = (ExpandableListView) parent;
mExpandableListView.expandGroup(groupPosition);

this may be a little work around but works how it should be. It opens all group ( at start ) and can be close any time

 for ( int i = 0; i < groupList.getCount(); i++ ) {
    groupList.expandGroup(i);
 } 

NOTE : put this code after setting adapter on your expandable view, or else it may cause error. Hope it helps.

android.widget.ExpandableListView.expandGroup java code , Expand all children in expandable list view. ExpandableListView mExpandableListView = (ExpandableListView) parent; mExpandableListView. groups which can individually be expanded to show its children. The items come from the expandableListAdapter associated with this view. Developers use expandable listview because using two level listview will give better user experience. Users can also expand and collapse parent groups as per their requirements. Final Look


first fill the adapter than put this code in your oncreate method

   int count = adapter.getGroupCount();
                for ( int i = 0; i < count; i++ ) 
                    listView.expandGroup(i);

android.widget.ExpandableListView.collapseGroup java code , public T expand(boolean expand){ if(view instanceof ExpandableListView){ private void collapseAll() { // collapse all elements on view change. How to find clicked view in expandableview and display more then 1 child in android. Android expandable list view shows items in a vertically scrolling two-level list. This differs from the ListView by allowing two levels: groups which can individually be expanded to show its children. You can attach listeners to the Android ExpandableListView to listen for OnClick events on the Group or the individual children.


Expanding all groups

for(int i=0; i < myAdapter.getGroupCount(); i++)
    myExpandableListView.expandGroup(i);

if you wish to make them unCollapseable.

myExpandableListView.setOnGroupClickListener(new OnGroupClickListener() {
  @Override
  public boolean onGroupClick(ExpandableListView parent, View v,int  groupPosition, long id) { 
    return true; 
  }
});

ExpandableListView, Child items are displayed when their parent group is expanded, and they are hidden You can expand or collapse all the groups of the list by setting the Group See Also. Working With Android Expandable List Controls · Collapse Action  In the above code we’ve implemented all the interfaces that were discussed before. For the sake of simplicity, we’ll only display a Toast with the name of the item or the state of the group for every click. But these can be easily modified to perform any other operations. Below is our app with android expandable list view in action.


I have tried the responses listed but i found that i can use the getGroupCount() method to get the number of groups.

Using this method i can iterate and expand every group of my ExpandableListView

for (int i = 0; i < myExpandableListView.getExpandableListAdapter().getGroupCount(); i++) {
      //Expand group
      myExpandableListView.expandGroup(i);
 }

Expanding and Collapsing Expandable List Groups, ExpandableListView is a form of group and the child items. When I click on any group it is expanded and show the child items To show the view we have to extends BaseExpandableListAdapter and override its all methods. Getting particular view from expandable listview. java,android,listview,android-fragments,expandablelistview. You shouldn't pass your view item form a fragment to an other. You should retrieve the object associated with your group view, pass this object to your second/edition fragment.


Expandable ListView in Android with Examples, Each group can be expanded or collapsed particularly to show or hide its children items. Most useful for show information like tree. It also  Well with xamarin forms it's quite easy to implement the expandable listview and even you can expand the Group Listview in xamarin forms. Just take a look at the article that explains how you can achieve the expandable listview functionality.


Tutorial : Android Expandable List View (custom adapter), ExpandableListView is a type of view very much similar to a ListView but allows We also learn how to programmatically expand and collapse all groups or and getGroupView() to display our group information and the child row information. This differs from the ListView by allowing two levels: groups which can individually be expanded to show its children. The items come from the ExpandableListAdapter associated with this view. Expandable lists are able to show an indicator beside each item to display the item's current state (the states are usually one of expanded group


Android ExpandableListView Example, But i need this expandablelistview as expand and collapse. That is if child layout expanded ,then all the parent layouts should collapse. And need to add data from​  ExpandableListView allows the user to expand grouped set of items.Items are like ListView which are expanded when user click them. Expandable ListView is used to categorize the data and a better to represent grouped data. So Start building your Expandable Listview Sample.