Android中使用HTTPClient进行网络通讯的例子
2013-05-09 00:01 833 0
HTTP 协议可能是现在 Internet 上使用得最多、最重要的协议了，越来越多的 Java 应用程序需要直接通过 HTTP 协议来访问网络资源。虽然在 JDK 的 java net包中已经提供了访问 HTTP 协议的基本功能，但是对于大部分应用程序来说，JDK 库本身提供的功能还不够丰富和灵活。HttpClient 是 Apache Jakarta Common 下的子项目，用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包，并且它支持 HTTP 协议最新的版本和建议。HttpClient 已经应用在很多的项目中，比如 Apache Jakarta 上很著名的另外两个开源项目 Cactus 和 HTMLUnit 都使用了 HttpClient。
布局XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:text="GET" android:id="@+id/Button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</Button>
<Button android:text="POST" android:id="@+id/Button02"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</Button>
<TextView android:id="@+id/TextView" android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
Activity的代码
package com.Aina.Android;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
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.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.util.EntityUtils;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class Test extends Activity implements Runnable{
/** Called when the activity is first created. */
private Button btn_get = null;
private Button btn_post = null;
private TextView tv_rp = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn_get = (Button) this.findViewById(R.id.Button01);
btn_post = (Button) this.findViewById(R.id.Button02);
tv_rp = (TextView) this.findViewById(R.id.TextView);
btn_get.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp?par=request-get";
HttpGet request = new HttpGet(httpUrl);
HttpClient httpClient = new DefaultHttpClient();
try {
HttpResponse response = httpClient.execute(request);
if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){
String str = EntityUtils.toString(response.getEntity());
tv_rp.setText(str);
}else{
tv_rp.setText("请求错误");
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
btn_post.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp";
HttpPost request = new HttpPost(httpUrl);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("par","request-post"));
try {
HttpEntity entity = new UrlEncodedFormEntity(params, "UTF-8");
request.setEntity(entity);
HttpClient client = new DefaultHttpClient();
HttpResponse response = client.execute(request);
if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){
String str = EntityUtils.toString(response.getEntity());
tv_rp.setText(str);
}else{
tv_rp.setText("请求错误");
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
new Thread(this).start();
}
public void refresh(){
String httpUrl = "http://192.168.0.132:8080/Android/httpreq.jsp";
try {
URL url = new URL(httpUrl);
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
urlConn.connect();
InputStream input = urlConn.getInputStream();
InputStreamReader inputreader = new InputStreamReader(input);
BufferedReader reader = new BufferedReader(inputreader);
String str = null;
StringBuffer sb = new StringBuffer();
while((str = reader.readLine())!= null){
sb.append(str).append("\\n");
}
if(sb != null){
tv_rp.setText(sb.toString());
}else{
tv_rp.setText("NULL");
}
reader.close();
inputreader.close();
input.close();
reader = null;
inputreader = null;
input = null;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public Handler handler = new Handler(){
public void handleMessage(Message msg){
super.handleMessage(msg);
refresh();
}
};
public void run() {
// TODO Auto-generated method stub
while(true){
try {
Thread.sleep(1000);
handler.sendMessage(handler.obtainMessage());
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
manifest文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.Aina.Android"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Test"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET" />
