import java.io.IOException; importimport 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. */@Overridepublic 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HttpResponseHttpResponse 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();}});}
}

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. */@Overridepublic 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httpRequesthttpRequest.setEntity(httpentity);//取得默认的HttpClientHttpClient httpclient = new DefaultHttpClient();//取得HttpResponseHttpResponse 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();}});}
}