请求网络数据

来源：互联网发布：网络教育怎么编辑：程序博客网时间：2024/06/03 20:19
package com.example.lianxi01;import android.graphics.Bitmap;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import com.google.gson.Gson;import java.util.List;public class MainActivity extends AppCompatActivity {    private ListView listView;    private String urlTotal="http://api.expoon.com/AppNews/getNewsList/type/1/p/1";    private List<Product.DataBean> dataList;    private TextView tv3;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        listView = (ListView) findViewById(R.id.lv);        initdata();    }    public void initdata(){        new MysyncTask().execute(urlTotal);    }    class MysyncTask extends AsyncTask<String,Void,String>{        private List<Product.DataBean> data;        @Override        protected String doInBackground(String... strings) {            String url=strings[0];            String netjson = NetWordUtils.getNetjson(url);            return netjson;        }        @Override        protected void onPostExecute(String s) {            super.onPostExecute(s);            Gson gson=new Gson();            Product product = gson.fromJson(s, Product.class);            dataList = product.getData();            MyAdapter myAdapter=new MyAdapter();            listView.setAdapter(myAdapter);        }    }    class MyAdapter extends BaseAdapter{        @Override        public int getCount() {            return dataList.size();        }        @Override        public Object getItem(int i) {            return dataList.get(i);        }        @Override        public long getItemId(int i) {            return i;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            view = View.inflate(MainActivity.this, R.layout.item, null);            TextView tv1 = (TextView)view.findViewById(R.id.tv1);            TextView tv2 = (TextView)view.findViewById(R.id.tv2);            TextView tv3 = (TextView)view.findViewById(R.id.tv3);            ImageView iv = (ImageView)view.findViewById(R.id.iv);            tv1.setText(dataList.get(i).getNews_id());            tv2.setText(dataList.get(i).getNews_title());            tv3.setText(dataList.get(i).getNews_summary());            new MyImagerSyncTask(iv).execute(dataList.get(i).getPic_url());            return view;        }    }    class MyImagerSyncTask extends AsyncTask<String,Void,Bitmap>{        private ImageView iv;        public MyImagerSyncTask(ImageView iv) {            this.iv=iv;        }        @Override        protected Bitmap doInBackground(String... strings) {            String urlstring = strings[0];            Bitmap netimage = NetWordUtils.getNetimage(urlstring);            return netimage;        }        @Override        protected void onPostExecute(Bitmap bitmap) {            super.onPostExecute(bitmap);            iv.setImageBitmap(bitmap);        }    }}
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