add AndroLua assets

app/src/main/assets/android/ELVA.lua

@@ -0,0 +1,106 @@
+-- ELVA.lua
+-- Expandable List View Adapter using a Lua table.
+require 'android.import'
+
+return function(groups,overrides)
+    local ELA = {}
+    local my_observable = bind 'android.database.DataSetObservable'()
+
+    function ELA.areAllItemsEnabled ()
+        return true
+    end
+
+    function ELA.getGroup (groupPos)
+        return groups[groupPos+1].group
+    end
+
+    function ELA.getGroupCount ()
+        return #groups
+    end
+
+    function ELA.getChild (groupPos,childPos)
+        return groups[groupPos+1][childPos+1]
+    end
+
+    function ELA.getChildrenCount (groupPos)
+        return #groups[groupPos+1]
+    end
+
+    function ELA.getChildId (groupPos,childPos)
+        return childPos+1
+    end
+
+    function ELA.getCombinedChildId (groupPos,childPos)
+        return 1000*groupPos + childPos
+    end
+
+    function ELA.getCombinedGroupId (groupPos)
+        return groupPos+1
+    end
+
+    function ELA.getGroupId (groupPos)
+        return groupPos+1
+    end
+
+    function ELA.hasStableIds ()
+        return false
+    end
+
+    function ELA.isChildSelectable (groupPos,childPos)
+        return true
+    end
+
+    function ELA.isEmpty ()
+        return ELA.getGroupCount() == 0
+    end
+
+    function ELA.onGroupCollapsed (groupPos)
+        --print('collapse',groupPos)
+    end
+
+    function ELA.onGroupExpanded (groupPos)
+        --print('expand',groupPos)
+    end
+
+    function ELA.registerDataSetObserver (observer)
+        my_observable:registerObserver(observer)
+    end
+
+    function ELA.unregisterDataSetObserver (observer)
+        my_observable:unregisterObserver(observer)
+    end
+
+    function ELA.notifyDataSetChanged()
+        my_observable:notifyChanged()
+    end
+
+    function ELA.notifyDataSetInvalidated()
+        my_observable:notifyInvalidated()
+    end
+
+    local getGroupView, getChildView = overrides.getGroupView, overrides.getChildView
+    if not getGroupView or not getChildView then
+        error('must override getGroupView and getChildView')
+    else
+        overrides.getGroupView = nil
+        overrides.getChildView = nil
+        getGroupView = android.safe(getGroupView)
+        getChildView = android.safe(getChildView)
+    end
+
+    function ELA.getGroupView (groupPos,expanded,view,parent)
+        return getGroupView(ELA.getGroup(groupPos),groupPos,expanded,view,parent)
+    end
+
+    function ELA.getChildView (groupPos,childPos,lastChild,view,parent)
+        return getChildView (ELA.getChild(groupPos,childPos),groupPos,childPos,lastChild,view,parent)
+    end
+
+    -- allow for overriding any of the others...
+    for k,v in pairs(overrides) do
+        ELA[k] = v
+    end
+
+    return proxy('android.widget.ExpandableListAdapter,sk.kottman.androlua.NotifyInterface',ELA)
+
+end