HttpURLConnection获取JSON处理

来源：互联网发布：地籍数据标准编辑：程序博客网时间：2024/06/16 13:33
package com.zhidi.httpgetjson;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.ListView;public class MainActivity extends Activity {private Button bt_get;private ListView lv_show;/**get请求URL地址*/private static final String URL="";String result="";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                init();                bt_get.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {showList();}});    }        private void init(){    bt_get=(Button)findViewById(R.id.bt_get);    lv_show=(ListView)findViewById(R.id.lv_show);    }        /**     * 开启线程访问网络得到数据更行UI     */    private void showList(){    final Handler handler = new Handler() {            @Override              public void handleMessage(Message msg) {                if (msg.what == 1) {                showListByResult(result);                }              }          };        // 启动线程来执行任务          new Thread() {            public void run() {            //请求网络            getNoteList();                             Message m = new Message();                  m.what = 1;                // 发送消息到Handler                  handler.sendMessage(m);              }          }.start();    }        /**     * 获取note列表     */    public void getNoteList(){        try {              URL url = new URL(URL);              HttpURLConnection conn = (HttpURLConnection)url.openConnection();              InputStreamReader is = new InputStreamReader(conn.getInputStream());            BufferedReader bufferedReader = new BufferedReader(is);            StringBuffer strBuffer = new StringBuffer();            String line = null;            while (null!=(line = bufferedReader.readLine()))  {                strBuffer.append(line);            }                        result = strBuffer.toString();            Log.i("result:", result);    is.close();    conn.disconnect();        } catch (Exception e) {              e.printStackTrace();          }      }        /**     * 根据返回结果json解析展示list     * @param re     */    public void showListByResult(String json){    List<String> noteList = new ArrayList<String>();//列表try {//构建JSON数组对象          JSONArray array = new JSONArray(json);//从JSON数组对象读取数据          for(int i=0 ; i < array.length() ; i++){              //获取各个属性的值              JSONObject item = array.getJSONObject(i);              String id = item.getString("id");              String title = item.getString("title");              String content = item.getString("content");            String times = item.getString("times");                          //例子中先用一个字段             noteList.add(title);         }} catch (JSONException e) {e.printStackTrace();}          ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,                android.R.layout.simple_list_item_1, noteList);        lv_show.setAdapter(adapter);    }    }
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