ArtistGridFragment.java

package com.airplayer.fragment.libchild;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.airplayer.R;
import com.airplayer.fragment.singleitem.ArtistFragment;
import com.airplayer.model.AirModelSingleton;
import com.airplayer.model.Artist;
import com.airplayer.adapter.AirAdapter;
import com.facebook.drawee.view.SimpleDraweeView;

import java.util.List;

/**
 * Created by ZiyiTsang on 15/6/9.
 */
public class ArtistGridFragment extends MyLibraryChildFragment {

    private List<Artist> mList;
    private ArtistAdapter adapter;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mList = AirModelSingleton.getInstance(getParentFragment().getActivity()).getArtistArrayList();
    }

    @Override
    public void setupRecyclerView(RecyclerView recyclerView) {
        final GridLayoutManager manager = new GridLayoutManager(getParentFragment().getActivity(), 2);
        manager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                return position == 0 ? manager.getSpanCount() : 1;
            }
        });
        recyclerView.setLayoutManager(manager);

        // ====== set adapter for recyclerView ======
        adapter = new ArtistAdapter(getParentFragment().getActivity(), mList);
        adapter.setOnItemClickListener(new AirAdapter.OnItemClickListener() {
            @Override
            public void onItemClicked(View view, int position) {
                FragmentTransaction ft = getParentFragment().getActivity()
                        .getSupportFragmentManager().beginTransaction();
                ft.replace(R.id.fragment_container, ArtistFragment.newInstance(mList.get(position - 1)));
                ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                ft.addToBackStack(null);
                ft.commit();
            }
        });
        recyclerView.setAdapter(adapter);
    }

    @Override
    public void onResume() {
        super.onResume();
        adapter.notifyDataSetChanged();
    }

    private class ArtistAdapter extends AirAdapter {

        public ArtistAdapter(Context context, List<Artist> list) {
            super(context, list);
        }

        @Override
        public AirItemViewHolder onCreateItemViewHolder(ViewGroup parent) {
            return new ArtistItemViewHolder(getLayoutInflater()
                    .inflate(R.layout.recycler_item_artist, parent, false));
        }

        @Override
        public void onBindItemViewHolder(AirItemViewHolder itemHolder, int position) {
            if (itemHolder instanceof ArtistItemViewHolder) {
                ArtistItemViewHolder artistViewHolder = (ArtistItemViewHolder) itemHolder;

                Artist item = (Artist) getList().get(position - 1);

                artistViewHolder.textView.setText(item.getName());
                artistViewHolder.draweeView.setImageURI(item.getArtistPictureUri());
            }
        }

        public class ArtistItemViewHolder extends AirAdapter.AirItemViewHolder {
            SimpleDraweeView draweeView;
            TextView textView;

            public ArtistItemViewHolder(View itemView) {
                super(itemView);
                draweeView = (SimpleDraweeView) itemView.findViewById(R.id.artist_image);
                textView = (TextView) itemView.findViewById(R.id.artist_name);
            }
        }
    }
}