Android----------RecyclerView数据展示

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1.首先导入依赖：

compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

2.适配器类：

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);        }    }}

3.主界面（用到RecyclerView的主要是initdata()方法和Handler）：

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) {    }}

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