HttpClient 联网接口

/////////////////////////HttpGet 方式////////////////////////////////////

 import java.io.IOException; import

import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class Activity02 extends Activity
{
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.http);
  TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
  // http地址
  String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";
  //HttpGet连接对象
  HttpGet httpRequest = new HttpGet(httpUrl);
  try
  {
   //取得HttpClient对象
   HttpClient httpclient = new DefaultHttpClient();
   //请求HttpClient，取得HttpResponse
   HttpResponse httpResponse = httpclient.execute(httpRequest);
   //请求成功
   if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
   {
    //取得返回的字符串
    String strResult = EntityUtils.toString(httpResponse.getEntity());
    mTextView.setText(strResult);
   }
   else
   {
    mTextView.setText("请求错误!");
   }
  }
  catch (ClientProtocolException e)
  {
   mTextView.setText(e.getMessage().toString());
  }
  catch (IOException e)
  {
   mTextView.setText(e.getMessage().toString());
  }
  catch (Exception e)
  {
   mTextView.setText(e.getMessage().toString());
  }  
 
  //设置按键事件监听
  Button button_Back = (Button) findViewById(R.id.Button_Back);
  /* 监听button的事件信息 */
  button_Back.setOnClickListener(new Button.OnClickListener() 
  {
   public void onClick(View v)
   {
    /* 新建一个Intent对象 */
    Intent intent = new Intent();
    /* 指定intent要启动的类 */
    intent.setClass(Activity02.this, Activity01.class);
    /* 启动一个新的Activity */
    startActivity(intent);
    /* 关闭当前的Activity */
    Activity02.this.finish();
   }
  });
 }
}

/////////////////////HttpPost 方式//////////////////

package com.yarin.android.Examples_08_02;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
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.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class Activity03 extends Activity
{
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.http);
  TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);
  // http地址
  String httpUrl = "http://192.168.1.110:8080/httpget.jsp";
  //HttpPost连接对象
  HttpPost httpRequest = new HttpPost(httpUrl);
  //使用NameValuePair来保存要传递的Post参数
  List<NameValuePair> params = new ArrayList<NameValuePair>();
  //添加要传递的参数
  params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));
  try
  {
   //设置字符集
   HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");
   //请求httpRequest
   httpRequest.setEntity(httpentity);
   //取得默认的HttpClient
   HttpClient httpclient = new DefaultHttpClient();
   //取得HttpResponse
   HttpResponse httpResponse = httpclient.execute(httpRequest);
   //HttpStatus.SC_OK表示连接成功
   if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
   {
    //取得返回的字符串
    String strResult = EntityUtils.toString(httpResponse.getEntity());
    mTextView.setText(strResult);
   }
   else
   {
    mTextView.setText("请求错误!");
   }
  }
  catch (ClientProtocolException e)
  {
   mTextView.setText(e.getMessage().toString());
  }
  catch (IOException e)
  {
   mTextView.setText(e.getMessage().toString());
  }
  catch (Exception e)
  {
   mTextView.setText(e.getMessage().toString());
  }  
  //设置按键事件监听
  Button button_Back = (Button) findViewById(R.id.Button_Back);
  /* 监听button的事件信息 */
  button_Back.setOnClickListener(new Button.OnClickListener() 
  {
   public void onClick(View v)
   {
    /* 新建一个Intent对象 */
    Intent intent = new Intent();
    /* 指定intent要启动的类 */
    intent.setClass(Activity03.this, Activity01.class);
    /* 启动一个新的Activity */
    startActivity(intent);
    /* 关闭当前的Activity */
    Activity03.this.finish();
   }
  });
 }
}