异步Get解析网络（图片，文字，ListView）

package com.example.textview_imager_wangluo;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //控件
        lv = (ListView) findViewById(R.id.lv);
        //网络地址
        try {
            wzdata("http://apis.juhe.cn/cook/query.php?key=81921c6270f37eeec75be4081bd61e91&menu="+ URLEncoder.encode("秘制红烧肉","utf-8"));
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    //文字异步
    private void wzdata(String wz) {

        new AsyncTask<String, Void, String>() {

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                if (s != null) {
                    Gson gson = new Gson();

                    Bean bean1 = gson.fromJson(s, Bean.class);
                    //list得到自己想要的数据
                    List<Bean.ResultBean.DataBean.StepsBean> list = bean1.getResult().getData().get(0).getSteps();

                     //My_base base = new My_base(MainActivity.this,list);
                    //绑定适配器
                    Youhua youhua = new Youhua(list);
                    lv.setAdapter(youhua);
                }
            }

            @Override
            protected String doInBackground(String... strings) {
                String url = strings[0];

                try {
                    //URL方法
                    HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();

                    connection.setRequestMethod("GET");
                    connection.setReadTimeout(5000);
                    connection.setConnectTimeout(5000);
                    //服务器响应
                    int code = connection.getResponseCode();
                    if (code == 200) {
                        InputStream is = connection.getInputStream();
                        //解析
                        String shuju = Jiexi.shuju(is);
                        return shuju;
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        }.execute(wz);
    }

    //适配器
    class Youhua extends BaseAdapter{
        List<Bean.ResultBean.DataBean.StepsBean> list;
        public Youhua(List<Bean.ResultBean.DataBean.StepsBean> list) {
            this.list = list;
        }

        @Override
        public int getCount() {
            if (list != null){
                return  list.size();
            }
            return 0;
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return 0;
        }

        @Override
        public View getView(int postion, View convertView, ViewGroup viewGroup) {
            if(convertView == null){
                convertView = convertView.inflate(MainActivity.this,R.layout.youhua,null);
            }
            //适配器控件

            ImageView img = (ImageView) convertView.findViewById(R.id.im);
            TextView tv = (TextView) convertView.findViewById(R.id.tv1);
            //设置相应控件显示信息
            tv.setText(list.get(postion).getStep());
            //加载图片
            tudata(list.get(postion).getImg(),img);
            return convertView;
        }


        //图片异步
        private  void tudata(String wz,final ImageView im){
            new AsyncTask<String,Void,Bitmap>(){
                @Override
                //返回的Bitmap图片数据
                protected void onPostExecute(Bitmap bitmap) {
                    super.onPostExecute(bitmap);
                    if (bitmap != null){
                        im.setImageBitmap(bitmap);
                    }else {
                        im.setImageResource(R.mipmap.ic_launcher);
                    }
                }
                //解析图片数据
                @Override
                protected Bitmap doInBackground(String... strings) {

                    try {
                        //URL方法
                        String url = strings[0];
                        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
                        connection.setRequestMethod("GET");
                        connection.setReadTimeout(5000);
                        connection.setConnectTimeout(5000);

                        int code = connection.getResponseCode();
                        
                        if (code == 200){
                            InputStream im = connection.getInputStream();

                            return BitmapFactory.decodeStream(im);
                        }

                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    return null;
                }
            }.execute(wz);
        }
    }
}