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POExpandableLists in Android, I want to allow only one parent list to expand at a time
 

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  1. POExpandableLists in Android, I want to allow only one parent list to expand at a time
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    <p>I want to make only one item in the parent list expand at a time, my code for the onCreate is currently the following. (It works as I want, But the method to allow only one parent open at a time doesnt work)</p> <pre><code>public void onCreate(Bundle savedInstanceState) { try{ super.onCreate(savedInstanceState); setContentView(R.layout.main); final SimpleExpandableListAdapter expListAdapter = new SimpleExpandableListAdapter( //FOR LEVEL 1 SCREEN this, createGroupList(), // METHOD TO CREATE PARENTLIST Creating group List. R.layout.group_row, // REF TO XML FILENAME. new String[] { "Group Item" }, // STRING ARRAY HOLDING ONE KEY THAT REF'S ALL PARENT LIST ITEMS. new int[] { R.id.row_name }, // REF TO I.D. OF PARENT XML. ID of each group item.-Data under the key goes into this TextView. createChildList(), // METHOD TO CREATE CHILD LST. childData describes second-level entries. R.layout.child_row, // XMLFILE NAME FOR CHILD LIST.Layout for sub-level entries(second level). new String[] {"Sub Item"}, // KEY FOR CHILD ITEMS IN HASHMAP. Keys in childData maps to display. new int[] { R.id.grp_child} // XML ID FOR TEXTVIEW. Data under the keys above go into these TextViews. ); setListAdapter( expListAdapter ); // setting the adapter in the list. //**THIS IS WHAT I DONT KNOW HOW TO CODE:** list = (ExpandableListView) findViewById(R.id.row_name); list.setAdapter( expListAdapter); list.setGroupIndicator(null); list.setOnGroupExpandListener(new OnGroupExpandListener() { public void onGroupExpand(int groupPosition) { int len = expListAdapter.getGroupCount(); for (int i = 0; i &lt; len; i++) { if (i != groupPosition) { list.collapseGroup(i); } } } }); }catch(Exception e){ System.out.println("Errrr +++ " + e.getMessage()); } } </code></pre> <p>I understand the above code, However, I dont use expandableListViews, Im refferncing my program to my .xml files with the layouts of the expandablelist. And so I dont know how to apply the above to my program...</p> <p>main.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;ExpandableListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/bkg"/&gt; &lt;TextView android:id="@+id/android:empty" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="No items"/&gt; &lt;/LinearLayout&gt; </code></pre> <p>The method that I dont know how to apply is the following:</p> <pre><code> list = (ExpandableListView) findViewById(R.id.row_name); list.setAdapter( expListAdapter); list.setGroupIndicator(null); list.setOnGroupExpandListener(new OnGroupExpandListener() { public void onGroupExpand(int groupPosition) { int len = expListAdapter.getGroupCount(); for (int i = 0; i &lt; len; i++) { if (i != groupPosition) { list.collapseGroup(i); } } } }); </code></pre> <p>1) how do I refference the 'list' to my expandablelist activity? </p> <p>list is defined in the class as <code>private ExpandableListView list;</code></p> <p>I do not have any errors right now, But the method does not work.</p> <p>Any help is greatly appreciated!</p>
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    1. COI am still stuck on this..
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    2. COIs there no way I can bump this to the top of the listings?
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    3. COyou can find the solution in the following link:- http://stackoverflow.com/questions/4314777/programmatically-collapse-a-group-in-expandablelistview
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