android httpclient

res/layout/main.xml的内容如下：

01	<?xmlversion="1.0"encoding="utf-8"?>

02	<LINEARLAYOUTandroid:layout_height="fill_parent"android:layout_width="fill_parent"android:orientation="vertical"xmlns:android="http://schemas.android.com/apk/res/android">

03

04	<TEXTVIEWandroid:layout_height="wrap_content"android:layout_width="fill_parent"android:text="网络连接测试"android:id="@+id/TextView01"/>

05

06	<BUTTONtype=submitandroid:layout_height="wrap_content"android:layout_width="wrap_content"android:text="使用URLConnection访问GoogleWeatherAPI"android:id="@+id/Button01">

07

</BUTTON>

08

09	<BUTTONtype=submitandroid:layout_height="wrap_content"android:layout_width="wrap_content"android:text="使用HttpClient访问GoogleWeatherAPI"android:id="@+id/Button02">

10

</BUTTON>

11

12	<SCROLLVIEWandroid:layout_height="wrap_content"android:layout_width="wrap_content"android:id="@+id/ScrollView01">

13	<TEXTVIEWandroid:layout_height="wrap_content"android:layout_width="wrap_content"android:id="@+id/TextView02">

14	</TEXTVIEW>

15	</SCROLLVIEW>

16	</LINEARLAYOUT>

3、MainActivity.java的内容如下：

001	package android.basic.lesson30;

002

003	import java.io.InputStreamReader;

004	import java.net.HttpURLConnection;

005	import java.net.URL;

006

007	import org.apache.http.client.ResponseHandler;

008	import org.apache.http.client.methods.HttpGet;

009	import org.apache.http.impl.client.BasicResponseHandler;

010	import org.apache.http.impl.client.DefaultHttpClient;

011

012	import android.app.Activity;

013	import android.os.Bundle;

014	import android.view.View;

015	import android.widget.Button;

016	import android.widget.TextView;

017	import android.widget.Toast;

018

019	public class MainActivity extendsActivity {

020

021	TextView tv;

022

023	String googleWeatherUrl1 ="http://www.google.com/ig/api?weather=zhengzhou";

024	String googleWeatherUrl2 ="http://www.google.com/ig/api?hl=zh-cn&weather=zhengzhou";

025

026	/** Called when the activity is first created. */

027

@Override

028	publicvoid onCreate(Bundle savedInstanceState) {

029	super.onCreate(savedInstanceState);

030	setContentView(R.layout.main);

031

032

// 定义UI组件

033	Button b1 = (Button) findViewById(R.id.Button01);

034	Button b2 = (Button) findViewById(R.id.Button02);

035	tv = (TextView) findViewById(R.id.TextView02);

036

037	// 设置按钮单击监听器

038	b1.setOnClickListener(newView.OnClickListener() {

039

@Override

040	publicvoid onClick(View v) {

041	// 使用URLConnection连接GoogleWeatherAPI

042	urlConn();

043

}

044

});

045

046	// 设置按钮单击监听器

047	b2.setOnClickListener(newView.OnClickListener() {

048

@Override

049	publicvoid onClick(View v) {

050	// 使用HttpCient连接GoogleWeatherAPI

051	httpClientConn();

052

053

}

054

});

055

056

}

057

058	// 使用URLConnection连接GoogleWeatherAPI

059	protectedvoid urlConn() {

060

061

try{

062

// URL

063	URL url =new URL(googleWeatherUrl1);

064	// HttpURLConnection

065	HttpURLConnection httpconn = (HttpURLConnection) url.openConnection();

066

067	if(httpconn.getResponseCode() == HttpURLConnection.HTTP_OK) {

068	Toast.makeText(getApplicationContext(),"连接Google Weather API成功!",

069	Toast.LENGTH_SHORT).show();

070	// InputStreamReader

071	InputStreamReader isr =new InputStreamReader(httpconn.getInputStream(),"utf-8");

072

inti;

073	String content ="";

074

// read

075	while((i = isr.read()) != -1) {

076	content = content + (char) i;

077

}

078	isr.close();

079	//设置TextView

080	tv.setText(content);

081

}

082	//disconnect

083	httpconn.disconnect();

084

085	}catch (Exception e) {

086	Toast.makeText(getApplicationContext(),"连接Google Weather API失败", Toast.LENGTH_SHORT)

087

.show();

088	e.printStackTrace();

089

}

090

}

091

092	// 使用HttpCient连接GoogleWeatherAPI

093	protectedvoid httpClientConn() {

094	//DefaultHttpClient

095	DefaultHttpClient httpclient =new DefaultHttpClient();

096

//HttpGet

097	HttpGet httpget =new HttpGet(googleWeatherUrl2);

098	//ResponseHandler

099	ResponseHandler<STRING> responseHandler =new BasicResponseHandler();

100

101

try{

102	String content = httpclient.execute(httpget, responseHandler);

103	Toast.makeText(getApplicationContext(),"连接Google Weather API成功!",

104	Toast.LENGTH_SHORT).show();

105	//设置TextView

106	tv.setText(content);

107	}catch (Exception e) {

108	Toast.makeText(getApplicationContext(),"连接Google Weather API失败", Toast.LENGTH_SHORT)

109

.show();

110	e.printStackTrace();

111

}

112	httpclient.getConnectionManager().shutdown();

113

}

114	}</STRING>

4、最后别忘了在AndroidManifest.xml中加入访问网络的权限，<uses-permission android:name="android.permission.INTERNET"></uses-permission>

深入了解

http://topmanopensource.iteye.com/blog/821964