header-footer-recycler-view

This library adds header/footer functionality to vertical and horizontal RecyclerView (for all 3 built-in types--linear, staggered-grid, grid) and abstract RecyclerView.Adapter into an interface for easier usage of multiple ViewHolder types.

Dependencies

• App Compat v7: com.android.support:appcompat-v7:21.0.0 or higher
• RecyclerView v7: com.android.support:recyclerview-v7:21.0.0 or higher

Setup Instructions

• Set up the project dependencies

Sample Implementation

Activity/Fragment ``` for(int i = 0; i < count; i++){ mStrings.add(Integer.toString(i)); } mIntermediary = new ExampleIntermediary(mStrings); mLayoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL); mAdapter = new RecyclerViewHeaderFooterAdapter(mLayoutManager, mIntermediary); mAdapter.addHeader(ExampleHeaderFooter.getView(mContext, "Header")); mAdapter.addFooter(ExampleHeaderFooter.getView(mContext, "Footer")); mRecyclerView.setLayoutManager(mLayoutManager); mRecyclerView.setAdapter(mAdapter); ``` IRecyclerViewIntermediary - ExampleIntermediary ``` public class ExampleIntermediary implements IRecyclerViewIntermediary {

private List<String> mItems;

public ExampleIntermediary(List<String> items){
    mItems=items;
}

@Override
public int getItemCount() {
    return mItems.size();
}

@Override
public Object getItem(int position) {
    return mItems.get(position);
}

@Override
public RecyclerView.ViewHolder getViewHolder(ViewGroup viewGroup, int type) {
    switch (type){
       ... //based on the type (getItemViewType), return the correct view holder
    }
}

@Override
public int getItemViewType(int position) {
    return position % 4; //any logic can go here
}

@Override
public void populateViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
    switch (getItemViewType(position){
       ...
    }
}

}