ExpandableRecycleViewAdapter

Allow you to use same features like the ExpandableListAdapter. You define view types for groups and children.

##Demo See here.

##How to use Write your adapter and extend either ExpandableRecycleViewAdapter or ExpandableRecycleViewBaseAdapter. In general, you just need the first.

Simply override those methods required, similar to ExpandableListAdapter.

public abstract RecyclerView.ViewHolder onCreateGroupViewHolder(int viewType, ViewGroup parent);

public abstract RecyclerView.ViewHolder onCreateChildViewHolder(int viewType, ViewGroup parent);

public abstract void onBindGroupViewHolder(int position, Object dataItem, RecyclerView.ViewHolder holder);

public abstract void onBindChildViewHolder(int groupPosition, int childPosition, Object dataItem, RecyclerView.ViewHolder holder);

public abstract Object getGroup(int groupPosition);

public abstract Object getChild(int groupPosition, int childPosition);

public abstract int getGroupCount();

public abstract boolean initialExpanded(int groupPosition);

public abstract int getChildrenCount(int groupPosition);

public abstract int getGroupViewType(int groupPosition);

public abstract int getChildViewType(int groupPosition, int childPosition);

You can call setActionListener to interact with items.

abstract boolean onClickGroupItem(int position, GI dataItem, GVH holder);

abstract void onClickChildItem(int position, CI dataItem, CVH holder);

void onToggledGroup(int group, boolean toggle);

If you want to get current group or child's status such as positions, call getGroupIndex(int adapterPosition) and getChild(int adapterPosition). In generic case of adding/updating/deleting data and update views:

Update group data.

GroupIndex groupIdx = getGroupIndex(holder.getAdapterPosition());
if(groupIdx == null)
  return;
// Get group position by calling groupIdx.getPosition().
// Get group's children index data by calling groupIdx.getChildren().
// Get group's toggled status by calling groupIdx.isExpanded().
// Use those info to update your data. Then call:
notifyGroupInserted(int groupPosition, boolean expanded, int childrenCount);
notifyGroupRangedInserted(int groupPositionStart, boolean[] expanded, int[] childrenCount);
notifyGroupRemoved(GroupIndex groupIndexStart);
notifyGroupRangedRemoved(GroupIndex groupIndexStart, int itemCount);

Update child data.

ChildIndex childIdx = getChildIndex(holder.getAdapterPosition());
if(childIdx == null)
  return;
// Get child position by calling childIdx.getPosition().
// Get child's group index data by calling childIdx.getGroup().
// Use those info to update your data. Then call one of these:
notifyChildInserted(int groupPosition, int childPosition);
notifyChildRangedInserted(int groupPosition, int childPositionStart, int itemCount);
notifyChildRemoved(ChildIndex childIndex);
notifyChildRangeRemoved(ChildIndex childIndexStart, int itemCount);

##Unknowing issue This is a bug from nagive SDK. If you give transparent colors for all items when using RecyclerView.ItemDecoration. You will see they are not animating when items are animating with notifing. If anyone knows how to fix this please let me know.

##Contributing Welcome any comments and pull requests.

zeroarst/ExpandableRecycleViewAdapter

ExpandableRecycleViewAdapter