怎么请求聚合数据的数据，求一个demo，谢谢各位大神

Question

我自己做的请求不出来数据，下面上一个类的代码。请大神指点指点

package com.action;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.httpclient.util.HttpURLConnection;

import net.sf.json.JSONObject;

import android.app.Activity;
import android.os.*;
import android.view.*;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hanziqigua extends Activity{
/***********************/
public static final String DEF_CHATSET = "UTF-8";
public static final int DEF_CONN_TIMEOUT = 30000;
public static final int DEF_READ_TIMEOUT = 30000;
public static String userAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";

    String url ="http://v.juhe.cn/xhzd/query";//请求接口地址

/***********************/
private EditText hzText;
private Button hzStartbt;
private TextView hzTextBegin;

public static final String APPKEY ="4e60f85fda2216b3d39f106204bb8c3d";


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.hanziqigua_layout);

    /***控件初始化*/
    hzText = (EditText) findViewById(R.id.hzText);
    hzStartbt = (Button) findViewById(R.id.hzStartbt);
    hzTextBegin = (TextView) findViewById(R.id.hzTextBegin);
    /***/

    hzStartbt.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            /***拆分字符串*/
            String textBegin=hzText.getText().toString();
            final String textBeginOne=textBegin.substring(0,1);
            final String textBeginTwo=textBegin.substring(1,2);
            /***/
            System.out.println("第一个字  -->"+textBeginOne);
            System.out.println("第二个字  -->"+textBeginTwo);
            /***********/

            /***********网络请求****************/


            /***********第一个字的地址**********/
            final String newUrlone = url + "?" + "key=" + APPKEY + "&" + "word=" + textBeginOne;
            System.out.println("new url -- > "+ newUrlone);
            /***********************************/

            /***********第二个字的地址***********/
            final String newUrltwo = url + "?" + "key=" + APPKEY + "&" + "word=" + textBeginOne;
            System.out.println("new url -- > "+ newUrltwo);
            /***********************************/

            String result =null;
             String url ="https://v.juhe.cn/xhzd/query";//请求接口地址
                Map params = new HashMap();//请求参数
                    params.put("word",newUrlone);//填写需要查询的汉字，UTF8 urlencode编码
                    params.put("key",APPKEY);//应用APPKEY(应用详细页查询)
                    params.put("dtype","");//返回数据的格式,xml或json，默认json

                try {
                    result =net(url, params, "GET");
                    JSONObject object = JSONObject.fromObject(result);
                    if(object.getInt("error_code")==0){
                        System.out.println(object.get("result"));
                    }else{
                        System.out.println(object.get("error_code")+":"+object.get("reason"));
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

            /***********************************/

        }
    });

}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

/**************************************************************************************/
/**
*
* @param strUrl 请求地址
* @param params 请求参数
* @param method 请求方法
* @return 网络请求字符串
* @throws Exception
*/
public static String net(String strUrl, Map params,String method) throws Exception {
HttpURLConnection conn = null;
BufferedReader reader = null;
String rs = null;
try {
StringBuffer sb = new StringBuffer();
if(method==null || method.equals("GET")){
strUrl = strUrl+"?"+urlencode(params);
}
URL url = new URL(strUrl);
conn = (HttpURLConnection) url.openConnection();
if(method==null || method.equals("GET")){
conn.setRequestMethod("GET");
}else{
conn.setRequestMethod("POST");
conn.setDoOutput(true);
}
conn.setRequestProperty("User-agent", userAgent);
conn.setUseCaches(false);
conn.setConnectTimeout(DEF_CONN_TIMEOUT);
conn.setReadTimeout(DEF_READ_TIMEOUT);
conn.setInstanceFollowRedirects(false);
conn.connect();
if (params!= null && method.equals("POST")) {
try {
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes(urlencode(params));
} catch (Exception e) {
// TODO: handle exception
}
}
InputStream is = conn.getInputStream();
reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
String strRead = null;
while ((strRead = reader.readLine()) != null) {
sb.append(strRead);
}
rs = sb.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
if (conn != null) {
conn.disconnect();
}
}
return rs;
}

//将map型转为请求参数型
public static String urlencode(Mapdata) {
StringBuilder sb = new StringBuilder();
for (Map.Entry i : data.entrySet()) {
try {
sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return sb.toString();
}
/**************************************************************************************/
}

Answer 1

就没有提示你 不能在UI线程操作网络请求。。。。。。。。。。。