android HttpClient无法POST数据？

Question

写了个类，封装了HttpClient，HttpPost,想实现以后Activity 重复使用doPost(),程序运行到 httpres = httpc.execute(httppost); 后就报错了,程序终止运行，求大神指点。

package common.libs;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

public class DoHttpClient {

public String doPost(HashMap hmap,String postUrl)
{
    String result="";
    String pdata="{";
    Set hset = hmap.entrySet();
    Iterator iter = hset.iterator();

    while(iter.hasNext())
    {
        Map.Entry entry = (Map.Entry) iter.next();
        pdata +="\""+entry.getKey().toString()+"\":\""+entry.getValue().toString()+"\",";

    }
    pdata = pdata.substring(0, pdata.length()-1)+"}";

    HttpPost httppost = new HttpPost(postUrl);
    HttpClient httpc = new DefaultHttpClient();
    List <NameValuePair> params = new ArrayList<NameValuePair>();
     params.add(new BasicNameValuePair("pdatajson", pdata));
     String results = "";


        try {
            httppost.setEntity(new UrlEncodedFormEntity(params, "utf-8"));
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        HttpResponse httpres;
        try {
            httpres = httpc.execute(httppost);
            if(httpres.getStatusLine().getStatusCode()== HttpStatus.SC_OK)
            {
                results += EntityUtils.toString(httpres.getEntity());


            }else{


                results +="操作失败"+httpres.getStatusLine().getStatusCode();
            }
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    return results;


}

}

-------------调用实例------------------

DebugPost a = new DebugPost();
a.start();

public class DebugPost extends Thread{

    public void run(){

         DoHttpClient dhc = new DoHttpClient();
                HashMap hmap = new HashMap();
                hmap.put("name", "zhangshan");
                hmap.put("password", "123456");
                String texts = dhc.doPost(hmap,"http://www.domain.com/mobileClient/loginHandle");
        handler.post(new Runnable(){
            public void run(){

                Toast.makeText(getApplicationContext(), texts, Toast.LENGTH_LONG).show();

            }

        });



    }

Answer 1

问题已解决。报错原因是不能在主线程里执行网络耗时操作。之前的doPost() 在handler.post(new Runnble(){});里面执行了 其实还是UI线程进行了操作，所以报错退出了

Answer 2

有详细的报错吗？

Answer 3

是不是没给INTERNET权限？Logcat里面的错误信息是什么？