涉及到的原生技術：

1.原生技術實現網路非同步請求

1.原生技術解析json資料

實現步驟：

實現程式碼：

**第一二步比較簡單，直接跳過

import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
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.imooc.demo.R;
import com.imooc.demo.app.model.LessonInfo;
import com.imooc.demo.app.model.LessonResult;

import org.json.JSONArray;
import org.json.JSONException;
 

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

（）
public class RequestDataActivity extends AppCompatActivity {
    public
 
 static final String URL_STRING = "http://www.imooc.com/api/teacher?type=2&page=1";
    private ListView mListView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mListView = (ListView) findViewById(R.id.list_view_demo);
        LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = layoutInflater.inflate(R.layout.header_list_demo, null);
        mListView.addFooterView(view);

        new AppAsyncTask().execute();
    }

    //內部類      建立資料介面卡
    public class AppListAdapter extends BaseAdapter {

        private Context mContext;
        private List<LessonInfo> mInfos;

        public AppListAdapter(Context context, List<LessonInfo> infos) {
            mContext = context;
            mInfos = infos;
        }

        @Override
        public int getCount() {
            return mInfos.size();
        }

        @Override
        public Object getItem(int position) {
            return mInfos.get(position);
        }

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

        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder viewHolder;
            LayoutInflater layoutInflater = (LayoutInflater)  getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            if (convertView == null) {
                viewHolder = new ViewHolder();
                convertView = layoutInflater.inflate(R.layout.item_demo_list, null);
                / 獲取控制元件
                viewHolder.nameTextView = (TextView) convertView.findViewById(R.id.title_text_view);
                viewHolder.avatarImageView = (ImageView) convertView.findViewById(R.id.icon_image_view);
                convertView.setTag(viewHolder);
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
            }
            /和資料之間進行繫結
            viewHolder.nameTextView.setText(mInfos.get(position).getName());
            /設定avatarImageView空間消失
            viewHolder.avatarImageView.setVisibility(View.GONE);

            return convertView;
        }

        class ViewHolder {
            ImageView avatarImageView;
            TextView nameTextView;
        }
    }


    //內部類 
    //實現非同步請求網路資料，並使用原生技術解析json資料和請求網路資料
    public class AppAsyncTask extends AsyncTask<Void, Integer, String> {

        @Override
        protected String doInBackground(Void... params) {
            非同步耗時請求
            return request(URL_STRING);
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            處理資料
            LessonResult lessonResult = new LessonResult();
            try {
                JSONObject jsonObject = new JSONObject(result);
                int status = jsonObject.getInt("status");
                String message = jsonObject.getString("msg");
                //--1.
                lessonResult.setStatus(status);
                //--2.
                lessonResult.setMessage(message);

                List<LessonInfo> lessonInfos = new ArrayList<>();
                JSONArray dataArray = jsonObject.getJSONArray("data");
                for (int i = 0; i < dataArray.length(); i++) {
                    LessonInfo lessonInfo = new LessonInfo();
                    JSONObject tempJsonObject = (JSONObject) dataArray.get(i);
                    lessonInfo.setID(tempJsonObject.getInt("id"));
                    lessonInfo.setName(tempJsonObject.getString("name"));
                    lessonInfos.add(lessonInfo);
                }
                //--3.
                lessonResult.setLessonInfos(lessonInfos);

            } catch (JSONException e) {
                e.printStackTrace();
            }
            mListView.setAdapter(new AppListAdapter(RequestDataActivity.this, lessonResult.getLessonInfos()));
        }


        /實現網路請求（原生程式碼）
        private String request(String urlString) {
            try {
                URL url = new URL(urlString);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.setConnectTimeout(30000);
                connection.setRequestMethod("GET");  // GET POST
                connection.connect();
                int responseCode = connection.getResponseCode();
                String responseMessage = connection.getResponseMessage();
                String result = null;
                if (responseCode == HttpURLConnection.HTTP_OK) {
                    InputStreamReader inputStreamReader = new InputStreamReader(connection.getInputStream());
                    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
                    StringBuilder stringBuilder = new StringBuilder();
                    String line;
                    while ((line = bufferedReader.readLine()) != null) {
                        stringBuilder.append(line);
                    }
                    result = stringBuilder.toString();
                } else {
                    // TODO:
                }
                return result;
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }
    }

}