android中的HttpUrlConnection的使用之一

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     tools:context="com.example.android_http.MainActivity" >
 7     <WebView 
 8         android:id="@+id/webview"
 9         android:layout_width="fill_parent"
10         android:layout_height="fill_parent"
11         />
12 
13 </LinearLayout>

 1 package com.example.android_http;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.os.Handler;
 6 import android.webkit.WebView;
 7 
 8 public class MainActivity extends Activity {
 9     private WebView webview = null;
10     private Handler handler = new Handler();
11     @Override
12     protected void onCreate(Bundle savedInstanceState) {
13         super.onCreate(savedInstanceState);
14         setContentView(R.layout.activity_main);
15         webview = (WebView) findViewById(R.id.webview);
16         new HttpThread("http://www.baidu.com", webview, handler).start();
17     }
18 
19 }

 1 package com.example.android_http;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 import java.net.HttpURLConnection;
 7 import java.net.MalformedURLException;
 8 import java.net.ProtocolException;
 9 import java.net.URL;
10 
11 import javax.net.ssl.HttpsURLConnection;
12 
13 import android.os.Handler;
14 import android.webkit.WebView;
15 
16 public class HttpThread  extends Thread{
17     private String url = null;
18     private WebView webview = null;
19     private Handler handler = null;
20     public HttpThread(String url, WebView webview, Handler handler)
21     {
22         this.handler = handler;
23         this.url = url;
24         this.webview = webview;
25     }
26     @Override
27     public void run() {
28         /*
29          * 关于HttpUrlConnection的使用，有什么不懂，请回去认真复习一下Java的网络编程
30          */
31         HttpURLConnection httpurlconnection = null;
32         try {
33             URL url = new URL(this.url); 
34             httpurlconnection = (HttpURLConnection) url.openConnection();
35         } catch (MalformedURLException e) {
36             // TODO Auto-generated catch block
37             e.printStackTrace();
38         } catch (IOException e) {
39             // TODO Auto-generated catch block
40             e.printStackTrace();
41         }
42         //允许超时5秒
43         try {
44             httpurlconnection.setReadTimeout(5000);
45             //以get的方式与服务器相连接
46             httpurlconnection.setRequestMethod("GET");
47         } catch (ProtocolException e) {
48             // TODO Auto-generated catch block
49             e.printStackTrace();
50         }
51         final StringBuffer sb = new StringBuffer();
52         String str = null;
53         try {
54             BufferedReader br = new BufferedReader(new InputStreamReader(httpurlconnection.getInputStream()));
55             try {
56                 while((str = br.readLine()) != null)
57                 {
58                     sb.append(str);
59                 }
60             } catch (IOException e) {
61                 // TODO Auto-generated catch block
62                 e.printStackTrace();
63             }
64         } catch (IOException e) {
65             // TODO Auto-generated catch block
66             e.printStackTrace();
67         }
68         handler.post(new Runnable() {
69 
70             public void run() {
71                 //第一个参数表示的是需要加载的数据--这个先前已经在输入流读入到了sb中
72                 //第二参数表示的是需要加载网站的编码格式--百度的编码格式就是如此
73                 /*
74                  * 需要注意的是：
75                  * loaddata不加载图片，如果想要加载图片，请使用loadDataWithBaseURL
76                  */
77                 webview.loadData(sb.toString(), "text/html;charset=utf-8", null);
78                 
79             }
80         });
81     }
82 
83 }