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

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