android http post调用webservice

那么接下来让我们看看在Android平台开发中如何执行一个Post请求：

以下是代码示例：

package com.jixuzou.search;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class mian extends Activity {
        /** Called when the activity is first created. */
        private Button btnTest;
        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                btnTest = (Button) findViewById(R.id.Button01);
                btnTest.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(View v) {
                                getWeather();
                        }
                });
        }
        private void getWeather(){
                try {
                        final String SERVER_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/getWeather"; // 定义需要获取的内容来源地址
                        HttpPost request = new HttpPost(SERVER_URL); // 根据内容来源地址创建一个Http请求
                        List params = new ArrayList();
                        params.add(new BasicNameValuePair("theCityCode", "长沙")); // 添加必须的参数
                        params.add(new BasicNameValuePair("theUserID", "")); // 添加必须的参数
                        request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8)); // 设置参数的编码
                        HttpResponse httpResponse = new DefaultHttpClient().execute(request); // 发送请求并获取反馈
                        // 解析返回的内容
                        if (httpResponse.getStatusLine().getStatusCode() != 404)
                        {
                                String result = EntityUtils.toString(httpResponse.getEntity());
                                System.out.println(result);
                        }
                } catch (Exception e) {
                }
        }
}