Android RecyclerView实现数据列表展示效果

compile 'com.android.support:recyclerview-v7:25.3.1'

public class NewsAdapter extends RecyclerView.Adapter {
 private View view;
 private Context mcontext;
 private ArrayList<NewsData.DataBean> mlist=new ArrayList<>();

 public NewsAdapter(Context mcontext) {
  this.mcontext = mcontext;
 }

 //找到需要导入的布局
 @Override
 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  view = LayoutInflater.from(mcontext).inflate(R.layout.news_item, null);
  return new ViewHolder(view);

 }
 //加载相应的内容
 @Override
 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
  ViewHolder viewholder=(ViewHolder)holder;
  viewholder.textview.setText(""+getItem(position).getNews_title());
  Glide.with(mcontext).load(getItem(position).getPic_url()).into(viewholder.ima);
 }

 //手写的重置数据的方法
 public void setdata(ArrayList<NewsData.DataBean> list){
  if (list!=null&&list.size()>0){
   mlist.addAll(list);
  }

 }
 //手写的获得视图的方法
 public NewsData.DataBean getItem(int position){
  return mlist.get(position);

 };

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


 //定义的ViewHolder类继承RecyclerView.ViewHolder 并找到布局中的ID
 public class ViewHolder extends RecyclerView.ViewHolder{
  private TextView textview;
  private ImageView ima;
  public ViewHolder(View itemView) {
   super(itemView);
   textview=(TextView)itemView.findViewById(R.id.tv);
   ima=(ImageView)itemView.findViewById(R.id.image);
  }
 }
}

public class MainActivity extends AppCompatActivity implements IMainView{
 private MainPresenter mainp;
 private NewsAdapter md;
 private RecyclerView recy;
 private ArrayList<NewsData.DataBean> mlist=new ArrayList<>();
 private String url="http://api.expoon.com/AppNews/getNewsList/type/1/p/1";
 private Handler hand=new Handler(){
  @Override
  public void handleMessage(Message msg) {
   super.handleMessage(msg);
   Gson gson=new Gson();
   if (msg.what==1) {
    NewsData newsData = gson.fromJson(msg.obj.toString(), NewsData.class);
    mlist=(ArrayList<NewsData.DataBean>) newsData.getData();

    md.setdata((ArrayList<NewsData.DataBean>) mlist);
    md.notifyDataSetChanged();
   }
  }
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  initview();
  initdata();
  initdatafromserver();
 }

 private void initview() {
  recy=(RecyclerView)findViewById(R.id.recy);
 }

 private void initdatafromserver() {
  //加载网络数据，找P层去要
  mainp.loadDataFromServer(url);

 }

 private void initdata() {
  mainp=new MainPresenter(this);
  //设置适配器
  md=new NewsAdapter(this);
  //创建默认的线性LayoutManager
  recy.setLayoutManager(new LinearLayoutManager(this));
  recy.setAdapter(md);
 }

 //重写的IMainView类接口的两个方法
 @Override
 public void successfulCallback(String str) {
  Message msg = Message.obtain();
  msg.what=1;
  msg.obj=str;
  hand.sendMessage(msg);
 }

 @Override
 public void errCallback(int code, String msg) {

 }
}