RecyclerFragment.java

package com.marshalchen.common.demoofui.recyclerplayground.fragments;

import android.app.Fragment;
import android.os.Bundle;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Toast;

import com.marshalchen.common.demoofui.R;
import com.marshalchen.common.demoofui.recyclerplayground.adapters.SimpleAdapter;

public abstract class RecyclerFragment extends Fragment implements AdapterView.OnItemClickListener {

    private RecyclerView mList;
    private SimpleAdapter mAdapter;

    /** Required Overrides for Sample Fragments */

    protected abstract RecyclerView.LayoutManager getLayoutManager();
    protected abstract RecyclerView.ItemDecoration getItemDecoration();
    protected abstract int getDefaultItemCount();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.recyclerview_playground_fragment_recycler, container, false);

        mList = (RecyclerView) rootView.findViewById(R.id.section_list);
        mList.setLayoutManager(getLayoutManager());
        mList.addItemDecoration(getItemDecoration());

        mAdapter = new SimpleAdapter();
        mAdapter.setItemCount(getDefaultItemCount());
        mAdapter.setOnItemClickListener(this);
        mList.setAdapter(mAdapter);

        return rootView;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.recyclerview_playground_grid_options, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_add:
                mAdapter.addItem();
                return true;
            case R.id.action_remove:
                mAdapter.removeItem();
                return true;
            case R.id.action_empty:
                mAdapter.setItemCount(0);
                return true;
            case R.id.action_small:
                mAdapter.setItemCount(5);
                return true;
            case R.id.action_medium:
                mAdapter.setItemCount(25);
                return true;
            case R.id.action_large:
                mAdapter.setItemCount(196);
                return true;
            case R.id.action_scroll_zero:
                mList.scrollToPosition(0);
                return true;
            case R.id.action_smooth_zero:
                mList.smoothScrollToPosition(0);
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Toast.makeText(getActivity(),
                "Clicked: " + position + ", index " + mList.indexOfChild(view),
                Toast.LENGTH_SHORT).show();
    }
}