public abstract class BaseListActivity extends BaseActivity implements SwipeRefreshLayout.OnRefreshListener {
    protected SwipeRefreshLayout mSwipeRefreshLayout;
    protected RecyclerView mRecyclerView;
    protected SampleListAdapter adapter;

    @Override
    protected void setUpView() {
        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.mSwipeRefreshLayout);
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mRecyclerView = (RecyclerView) findViewById(R.id.mRecyclerView);
    }

    @Override
    protected void setUpData() {
        mRecyclerView.setLayoutManager(getLayoutManager());
        adapter = new SampleListAdapter();
        mRecyclerView.setAdapter(adapter);

    }
//SwipeRefreshLayout默认下拉时才调用onRefresh，所以在一进来时就调用该方法
    protected void setRefreshing(){
        mSwipeRefreshLayout.post(new Runnable() {
            @Override
            public void run() {
                mSwipeRefreshLayout.setRefreshing(true);
                onRefresh();
            }
        });
    }
//默认的LinearLayoutManager，如果需要更改，重写该方法即可
    protected RecyclerView.LayoutManager getLayoutManager() {
        return new LinearLayoutManager(getApplicationContext());
    }



    class SampleListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//子类重写，自己实现
            return getViewHolder(parent, viewType);
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
//子类重写，自己实现
        onBind(holder, position);
        }

        @Override
        public int getItemCount() {
    //子类重写，自己实现
           return getDataCount();
        }
    }

    protected abstract int getDataCount();

    protected abstract RecyclerView.ViewHolder getViewHolder(ViewGroup parent, int viewType);

    protected abstract void onBind(RecyclerView.ViewHolder holder, int position);
}

public class SampleListActivity extends BaseListActivity implements SwipeRefreshLayout.OnRefreshListener{
    private List<String> mDataList = new ArrayList<>();


    @Override
    protected void setUpContentView() {
        setContentView(R.layout.activity_sample_list, R.string.sample_list_title);
    }


    @Override
    protected void setUpView() {
        super.setUpView();
    }

    @Override
    protected void setUpData() {
        super.setUpData();
        setRefreshing();
    }

    @Override
    public void onRefresh() {
        mDataList.clear();
        for (int i = 0; i < 50; i++) {
            mDataList.add("sample list item " + i);
        }
        adapter.notifyDataSetChanged();
        mSwipeRefreshLayout.setRefreshing(false);
    }

    @Override
    protected RecyclerView.ViewHolder getViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_sample_list_item, parent, false);
        return new SampleViewHolder(view);
    }

    @Override
    protected void onBind(RecyclerView.ViewHolder holder, int position) {
        ((SampleViewHolder) holder).mSampleListItemLabel.setText(mDataList.get(position));
    }

    @Override
    protected int getDataCount() {
        return mDataList.size();
    }




    class SampleViewHolder extends RecyclerView.ViewHolder {

        TextView mSampleListItemLabel;

        public SampleViewHolder(View itemView) {
            super(itemView);
            mSampleListItemLabel = (TextView) itemView.findViewById(R.id.mSampleListItemLabel);
        }
    }
}