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();

   }

  });

 }

}