Android http get/post传递参数。本程序介绍如何通过HttpClient模块来创建Http连接，并分别以Http Get和Post方法传递参数，连接之后取回web server的返回网页结果。

注意，在用Post时，传递变量必须用NameValuePais[]数组存储，通过HttpRequest.setEntity()方法来发出http请求。
此外，也必须通过DefaultHttpClient().execute(httpRequest)添加HttpRequest对象来接收web server的回复，在通过httpResponse.getEntity()取出回复信息.
在androidManifest.xml中必须添加权限：
<uses-permission android:name=”android.permission.INTERNET”></uses-permission>

[java] view plaincopyprint?
/*必需引用apache.http相关类别来建立HTTP联机*/
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
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;
/*必需引用java.io 与java.util相关类来读写文件*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class EX08_01 extends Activity
{
/*声明两个Button对象,与一个TextView对象*/
private Button mButton1,mButton2;
private TextView mTextView1;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

/*透过findViewById建构子建立TextView与Button对象*/
mButton1 =(Button) findViewById(R.id.myButton1);
mButton2 =(Button) findViewById(R.id.myButton2);
mTextView1 = (TextView) findViewById(R.id.myTextView1);

/*设定OnClickListener来聆听OnClick事件*/
mButton1.setOnClickListener(new Button.OnClickListener()
{
/*重写onClick事件*/
@Override
public void onClick(View v)
{
/*声明网址字符串*/
String uriAPI = “http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php”;
/*建立HTTP Post联机*/
HttpPost httpRequest = new HttpPost(uriAPI);
/*
* Post运作传送变量必须用NameValuePair[]数组储存
*/
List <NameValuePair> params = new ArrayList <NameValuePair>();
params.add(new BasicNameValuePair(“str”, “I am Post String”));
try
{
/*发出HTTP request*/
httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
/*取得HTTP response*/
HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
/*若状态码为200 ok*/
if(httpResponse.getStatusLine().getStatusCode() == 200)
{
/*取出响应字符串*/
String strResult = EntityUtils.toString(httpResponse.getEntity());
mTextView1.setText(strResult);
}
else
{
mTextView1.setText(“Error Response: “+httpResponse.getStatusLine().toString());
}
}
catch (ClientProtocolException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (IOException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (Exception e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}

}
});
mButton2.setOnClickListener(new Button.OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
/*声明网址字符串*/
String uriAPI = “http://www.dubblogs.cc:8751/Android/Test/API/Get/index.php?str=I+am+Get+String”;
/*建立HTTP Get联机*/
HttpGet httpRequest = new HttpGet(uriAPI);
try
{
/*发出HTTP request*/
HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
/*若状态码为200 ok*/
if(httpResponse.getStatusLine().getStatusCode() == 200)
{
/*取出响应字符串*/
String strResult = EntityUtils.toString(httpResponse.getEntity());
/*删除多余字符*/
strResult = eregi_replace(“(/r/n|/r|/n|/n/r)”,”",strResult);
mTextView1.setText(strResult);
}
else
{
mTextView1.setText(“Error Response: “+httpResponse.getStatusLine().toString());
}
}
catch (ClientProtocolException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (IOException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (Exception e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
}
});
}
/* 自定义字符串取代函数 */
public String eregi_replace(String strFrom, String strTo, String strTarget)
{
String strPattern = “(?i)”+strFrom;
Pattern p = Pattern.compile(strPattern);
Matcher m = p.matcher(strTarget);
if(m.find())
{
return strTarget.replaceAll(strFrom, strTo);
}
else
{
return strTarget;
}
}
}

http://blog.csdn.net/songylwq/article/details/12782257