百度APIStore對開發者而言是比較方便的工具，它提供了很多介面給我們。在這篇文章中將介紹APIstore的使用方法。

1.從百度APIdtore找到我們所需要的介面，以新聞為例。

2.使用HttpURLConnection方法訪問該介面，拿到資料用IO流讀取出來。需要注意的是：使用非同步任務類。

3.因為返回的資料型別是Json型別，所以我們應該使用Android解析Json型別的方法解析，具體步驟請參閱之前的部落格。

4.對解析出來的資料進行操作

程式碼部分：

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.jokerloveallen.ch08.util.FileUtil;
import com.jokerloveallen.ch08.util.HttpUtil;
import com.jokerloveallen.ch08.util.UrlUtil;

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

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class HttpNewsActivity extends AppCompatActivity {
    private Spinner spinner;
    private TextView tv;
    private SimpleAdapter sa;
    private List<Map<String,String>> channelList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_http_news);
        spinner = (Spinner) findViewById(R.id.channel);
        tv = (TextView) findViewById(R.id.news);

        channelList = new ArrayList<>();
        sa = new SimpleAdapter(this,channelList,
                android.R.layout.simple_list_item_1,
                new String[]{"name"},new int[]{android.R.id.text1});
        spinner.setAdapter(sa);
        new getChannel().execute();

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                Map ma = channelList.get(i);

                String channelName = (String) ma.get("name");
                String channeId = (String) ma.get(ma.get("name"));
                String[] flag =new String[]{channelName,channeId};
              new getConnet().execute(flag);
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });

    }

    //從網路返回內容
    public class getConnet extends AsyncTask<String,Void,String>{

        @Override
        protected String doInBackground(String... strings) {
            String httpUrl = UrlUtil.NewsUrl;
            String httpArg = "channelId="+strings[1]+"&"
                            +"channelName="+strings[0]+"&"
                            +"title=&"
                            +"page=1&"
                            +"needContent=1&"
                            +"needHtml=0";
            httpUrl = httpUrl + "?" + httpArg;
            return HttpUtil.HttpGet(httpUrl);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            if (s.equals("")){
                tv.setText("沒有資料");
            } else {
                tv.setText(s);
            }
        }
    }
    //從網路返回頻道
    public class getChannel extends AsyncTask<Void,Void,String>{

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            if (s.equals("")){
                Toast.makeText(getBaseContext(),"沒有資料",Toast.LENGTH_SHORT).show();
                return;
            }
            try {
                JSONObject obj = new JSONObject(s);
                JSONObject obj1 = obj.getJSONObject("showapi_res_body");
                JSONArray ja = obj1.getJSONArray("channelList");
                for (int i =0;i<ja.length();i++){
                    JSONObject channelobj = (JSONObject) ja.get(i);
                    String id = channelobj.getString("channelId");
                    String name = channelobj.getString("name");
                    Map map = new HashMap();
                    map.put("name",name);
                    map.put(name,id);
                    channelList.add(map);
                    sa.notifyDataSetChanged();
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }

        @Override
        protected String doInBackground(Void... voids) {
            return HttpUtil.HttpGet(UrlUtil.ChannelUrl);
        }
    }
}
 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpUtil {
    public static String HttpGet(String...strings){
        BufferedReader reader = null;
        StringBuilder sbf = new StringBuilder();
        HttpURLConnection connection = null;

        try {
            URL url = new URL(strings[0]);
            connection = (HttpURLConnection) url
                    .openConnection();
            connection.setRequestMethod("GET");
            // 填入apikey到HTTP header
            connection.setRequestProperty("apikey",
                    "5b46143955a4b1ff1b470a94315625cd");
            connection.connect();
            if(connection.getResponseCode() == 200) {
                InputStream is = connection.getInputStream();
                reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                String strRead1 = null;
                while ((strRead1 = reader.readLine()) != null) {
                    sbf.append(strRead1);
                    sbf.append("\r\n");
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (reader !=null ){
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (connection !=null){
                connection.disconnect();
            }
        }
        return sbf.toString();
    }
}