RecyclerView的简单适配

MainActivity类：

public class MainActivity extends AppCompatActivity {    private SwipyRefreshLayout srl;    private RecyclerView rv;    private Banner banner;    private List<String> images = new ArrayList<>();    private List<NewsBean> news = new ArrayList<>();    private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what){                case 0:                    String json = (String) msg.obj;                    try {                        JSONObject jsonObject = new JSONObject(json);                        JSONArray top_stories = jsonObject.getJSONArray("top_stories");                        for (int i = 0; i < top_stories.length() ; i++) {                            JSONObject top = top_stories.getJSONObject(i);                            String image = top.getString("image");                            images.add(image);                        }                        banner.setIndicatorGravity(Banner.CENTER);                        banner.setBannerStyle(Banner.CIRCLE_INDICATOR_TITLE);                        banner.isAutoPlay(true);                        banner.setDelayTime(2000);                        banner.setImages(images);                        JSONArray stories = jsonObject.getJSONArray("stories");                        String image = null;                        for (int i = 0; i < stories.length(); i++) {                            JSONObject stories1 = stories.getJSONObject(i);                            String title = stories1.getString("title");                            JSONArray images = stories1.getJSONArray("images");                            for (int j = 0; j < images.length() ; j++) {                                image = images.getString(j);                                Log.i("image",image);                            }                            NewsBean newsBean = new NewsBean(title,image);                            news.add(newsBean);                        }                        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this);                        rv.setLayoutManager(linearLayoutManager);                        MyAdapter adapter  = new MyAdapter(MainActivity.this,news);                        rv.setAdapter(adapter);                    } catch (JSONException e) {                        e.printStackTrace();                    }                    break;                case 1:                    String json1 = (String) msg.obj;                    try {                        JSONObject jsonObject = new JSONObject(json1);                        JSONArray stories = jsonObject.getJSONArray("stories");                        String image = null;                        for (int i = 0; i < stories.length(); i++) {                            JSONObject stories1 = stories.getJSONObject(i);                            String title = stories1.getString("title");                            JSONArray images = stories1.getJSONArray("images");                            for (int j = 0; j < images.length() ; j++) {                                image = images.getString(j);                                Log.i("image",image);                            }                            NewsBean newsBean = new NewsBean(title,image);                            news.add(newsBean);                        }                        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(MainActivity.this);                        rv.setLayoutManager(linearLayoutManager);                        MyAdapter adapter  = new MyAdapter(MainActivity.this,news);                        rv.setAdapter(adapter);                    } catch (JSONException e) {                        e.printStackTrace();                    }                    break;            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        srl = (SwipyRefreshLayout) findViewById(R.id.srl);        rv = (RecyclerView) findViewById(R.id.rv);        banner = (Banner) findViewById(R.id.banner);        dataGet();        srl.setDirection(SwipyRefreshLayoutDirection.BOTH);        srl.setColorSchemeResources(R.color.colorAccent, R.color.colorPrimary, R.color.colorPrimaryDark);        srl.setOnRefreshListener(new SwipyRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh(int index) {                dataGet();                handler.postDelayed(new Runnable() {                    @Override                    public void run() {                        Toast.makeText(MainActivity.this, "下拉刷新了", Toast.LENGTH_SHORT).show();                        srl.setRefreshing(false);                    }                },2000);            }            @Override            public void onLoad(int index) {                doGet();                handler.postDelayed(new Runnable() {                    @Override                    public void run() {                        Toast.makeText(MainActivity.this, "上拉加载了", Toast.LENGTH_SHORT).show();                        srl.setRefreshing(false);                    }                },2000);            }        });    }    public void dataGet(){        String url = "http://news-at.zhihu.com/api/4/news/latest";        OkHttp3Utils.doGet(url, new Callback() {            @Override            public void onFailure(Call call, IOException e) {                            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String json = response.body().string();                Message message = handler.obtainMessage(0,json);                message.sendToTarget();            }        });    }    public void doGet(){        String url = "http://news-at.zhihu.com/api/4/news/before/20131119";        OkHttp3Utils.doGet(url, new Callback() {            @Override            public void onFailure(Call call, IOException e) {            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String json = response.body().string();                Message message = handler.obtainMessage(1,json);                message.sendToTarget();            }        });    }}

Adapter类：

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {    private Context context;    private List<NewsBean> list;    public MyAdapter(Context context, List<NewsBean> list) {        this.context = context;        this.list = list;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        //获取视图        View view = LayoutInflater.from(context).inflate(R.layout.rv_item,null);        //得到WindowManager        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);        //得到屏幕的宽        int width = windowManager.getDefaultDisplay().getWidth();        RecyclerView.LayoutParams params = new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);        params.width = width;        view.setLayoutParams(params);        MyViewHolder holder = new MyViewHolder(view);        return holder;    }    @Override    public void onBindViewHolder(MyViewHolder holder, int position) {        holder.title.setText(list.get(position).getTitle());        Picasso.with(context).load(list.get(position).getImage()).placeholder(R.mipmap.ic_launcher).into(holder.image);    }    @Override    public int getItemCount() {        return list.size();    }    public class MyViewHolder extends RecyclerView.ViewHolder{        ImageView image;        TextView title;        public MyViewHolder(View itemView) {            super(itemView);            image = itemView.findViewById(R.id.image_rv);            title = itemView.findViewById(R.id.title_rv);        }    }}