Android RecyclerView实现数据列表展示效果

2019-12-12 02:29:51

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来源：转载

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本文实例为大家分享了Android九宫格图片展示的具体代码，供大家参考，具体内容如下

1.首先导入依赖：

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

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) { }}

效果图：