加载assets下的json串并用recyclerview显示

1.添加依赖

compile 'com.google.code.gson:gson:2.8.2'compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'compile 'com.facebook.fresco:fresco:0.11.0'compile 'com.facebook.fresco:animated-gif:0.12.0'

2.添加权限

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

3创建MyApplication继承Application

public class MyApplication extends Application {    @Override    public void onCreate() {        super.onCreate();        Fresco.initialize(this);    }}

4.HomeAdapter适配器

public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.MyViewHolder>{    Context context;    List<Supperclass.NewslistBean> list;    public HomeAdapter(Context context, List<Supperclass.NewslistBean> list) {        this.context = context;        this.list = list;    }    @Override    public HomeAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {            View view = LayoutInflater.from(context).inflate(R.layout.item_home,parent,false);        MyViewHolder holder = new MyViewHolder(view);        return holder;    }    @Override    public void onBindViewHolder(HomeAdapter.MyViewHolder holder, int position) {        holder.tv.setText(list.get(position).getTitle());        Uri uri =  Uri.parse(list.get(position).getPicUrl());        holder.sdv.setImageURI(uri);    }    @Override    public int getItemCount() {        return list.size();    }    class MyViewHolder extends RecyclerView.ViewHolder    {        TextView tv;        SimpleDraweeView sdv;        public MyViewHolder(View view)        {            super(view);            tv = (TextView) view.findViewById(R.id.id_num);            sdv = (SimpleDraweeView) view.findViewById(R.id.main_simple_drawee_view);        }    }}

5.mainactivity中读取本地json串并添加适配器

public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    private HomeAdapter mAdapter;    List<Supperclass.NewslistBean> newslist;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        InputStream inputStream = null;        try {             inputStream = getAssets().open("zzzz.json");            String data = convertStreamToString(inputStream);            Gson gson = new Gson();            Supperclass supperclass = gson.fromJson(data, Supperclass.class);                 newslist = supperclass.getNewslist();                mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);                mRecyclerView.setLayoutManager(new LinearLayoutManager(this));                mRecyclerView.setAdapter(mAdapter = new HomeAdapter(MainActivity.this,newslist));        } catch (IOException e) {            e.printStackTrace();        }    }    public  String convertStreamToString(InputStream is) {        BufferedReader reader = new BufferedReader(new InputStreamReader(is));        StringBuilder sb = new StringBuilder();        String line = null;        try {            while ((line = reader.readLine()) != null) {                sb.append(line);            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                is.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return sb.toString();    }}

6.bean类

public class Supperclass {    /**     * code : 200     * msg : success     * newslist : [{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/small8681bec69f9c1d6a43ef920082d04bf21496647674.jpg","title":"真是很少见！日本一家银行只存姑娘不存钱","url":"http://www.luanbian.com//lishi/yiyu/25329.html"},{"ctime":"2017-06-06 14:08","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/c7b6e163ab0cd2e73d73fa22d269cceb.jpg","title":"一曲成名红过刀郎，花200元赚得一亿利润！","url":"http://www.luanbian.com//lishi/yiyu/25331.html"},{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/5da421cae36b825d7c19e00522c78654.jpg","title":"香港四大天王谁居首？年轻时张学友颜值最低，老了却成功逆袭","url":"http://www.luanbian.com//lishi/yiyu/25332.html"},{"ctime":"2017-06-06 14:14","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-06/smalle2a960a265d59f8786c9e2f713266dc91496717348.jpg","title":"安以轩嫁入千亿豪门，大S微博发酸这样说","url":"http://www.luanbian.com//lishi/yiyu/25333.html"},{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-06/smalla64e8251141b3ca2ac158247952993721496719684.jpg","title":"\u201c国际明星\u201d英达父亲去世，不让亲儿子巴图参加","url":"http://www.luanbian.com//lishi/yiyu/25334.html"},{"ctime":"2017-06-06 14:39","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-06/small0ba83f51849d3c9fbd73cc99fa2017a11496721103.jpg","title":"村中寻一座明代古石桥，竟被告知在墙上?","url":"http://www.luanbian.com//lishi/yiyu/25335.html"},{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-06/small7c1f47cd2a87c73bcf9ab9352e5d25fd1496729645.jpg","title":"流浪狗叼着刚出生的弃婴向路人求救，感动落泪","url":"http://www.luanbian.com//lishi/yiyu/25336.html"},{"ctime":"2017-06-06 14:41","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-02/fba8bd9a885bc13cfcfc3454f3d0889f.jpg","title":"入赘豪门做女婿的8大男星，刘德华周润发均在列","url":"http://www.luanbian.com//lishi/yiyu/25319.html"},{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/d85c3437f009bee056a06a8a7bcd0fb9.jpg","title":"破洞牛仔裤隐藏巨大的危险，工人付出惨痛代价","url":"http://www.luanbian.com//lishi/yiyu/25328.html"},{"ctime":"2017-06-06 15:00","description":"明星花边","picUrl":"http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/small535838c27374b6be43a7ec865d2974281496650726.jpg","title":"一条鱼抵一辆保时捷 标价268万元惊呆了网友","url":"http://www.luanbian.com//lishi/yiyu/25330.html"}]     */    private int code;    private String msg;    private List<NewslistBean> newslist;    public int getCode() {        return code;    }    public void setCode(int code) {        this.code = code;    }    public String getMsg() {        return msg;    }    public void setMsg(String msg) {        this.msg = msg;    }    public List<NewslistBean> getNewslist() {        return newslist;    }    public void setNewslist(List<NewslistBean> newslist) {        this.newslist = newslist;    }    public static class NewslistBean {        /**         * ctime : 2017-06-06 15:00         * description : 明星花边         * picUrl : http://www.luanbian.com/d/file/lishi/yiyu/2017-06-05/small8681bec69f9c1d6a43ef920082d04bf21496647674.jpg         * title : 真是很少见！日本一家银行只存姑娘不存钱         * url : http://www.luanbian.com//lishi/yiyu/25329.html         */        private String ctime;        private String description;        private String picUrl;        private String title;        private String url;        public String getCtime() {            return ctime;        }        public void setCtime(String ctime) {            this.ctime = ctime;        }        public String getDescription() {            return description;        }        public void setDescription(String description) {            this.description = description;        }        public String getPicUrl() {            return picUrl;        }        public void setPicUrl(String picUrl) {            this.picUrl = picUrl;        }        public String getTitle() {            return title;        }        public void setTitle(String title) {            this.title = title;        }        public String getUrl() {            return url;        }        public void setUrl(String url) {            this.url = url;        }    }}

7.布局

activity_main布局

<android.support.v7.widget.RecyclerView    android:id="@+id/id_recyclerview"    android:divider="#ffff0000"    android:dividerHeight="10dp"    android:layout_width="match_parent"    android:layout_height="match_parent" />

item_home布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    xmlns:fresco="http://schemas.android.com/apk/res-auto">    <TextView        android:id="@+id/id_num"        android:layout_width="match_parent"        android:layout_height="50dp"        android:text="1" />    <com.facebook.drawee.view.SimpleDraweeView        android:layout_width="200dp"        android:layout_height="200dp"        android:id="@+id/main_simple_drawee_view"        fresco:placeholderImage="@mipmap/ic_launcher"/></LinearLayout>

最后附上json串，zzzz.json

{"code":200,"msg":"success","newslist":[{"ctime":"2017-06-06 15:00","title":"真是很少见！日本一家银行只存姑娘不存钱","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-05\/small8681bec69f9c1d6a43ef920082d04bf21496647674.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25329.html"},{"ctime":"2017-06-06 14:08","title":"一曲成名红过刀郎，花200元赚得一亿利润！","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-05\/c7b6e163ab0cd2e73d73fa22d269cceb.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25331.html"},{"ctime":"2017-06-06 15:00","title":"香港四大天王谁居首？年轻时张学友颜值最低，老了却成功逆袭","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-05\/5da421cae36b825d7c19e00522c78654.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25332.html"},{"ctime":"2017-06-06 14:14","title":"安以轩嫁入千亿豪门，大S微博发酸这样说","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-06\/smalle2a960a265d59f8786c9e2f713266dc91496717348.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25333.html"},{"ctime":"2017-06-06 15:00","title":"“国际明星”英达父亲去世，不让亲儿子巴图参加","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-06\/smalla64e8251141b3ca2ac158247952993721496719684.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25334.html"},{"ctime":"2017-06-06 14:39","title":"村中寻一座明代古石桥，竟被告知在墙上?","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-06\/small0ba83f51849d3c9fbd73cc99fa2017a11496721103.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25335.html"},{"ctime":"2017-06-06 15:00","title":"流浪狗叼着刚出生的弃婴向路人求救，感动落泪","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-06\/small7c1f47cd2a87c73bcf9ab9352e5d25fd1496729645.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25336.html"},{"ctime":"2017-06-06 14:41","title":"入赘豪门做女婿的8大男星，刘德华周润发均在列","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-02\/fba8bd9a885bc13cfcfc3454f3d0889f.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25319.html"},{"ctime":"2017-06-06 15:00","title":"破洞牛仔裤隐藏巨大的危险，工人付出惨痛代价","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-05\/d85c3437f009bee056a06a8a7bcd0fb9.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25328.html"},{"ctime":"2017-06-06 15:00","title":"一条鱼抵一辆保时捷 标价268万元惊呆了网友","description":"明星花边","picUrl":"http:\/\/www.luanbian.com\/d\/file\/lishi\/yiyu\/2017-06-05\/small535838c27374b6be43a7ec865d2974281496650726.jpg","url":"http:\/\/www.luanbian.com\/\/lishi\/yiyu\/25330.html"}]}