Android 使用cmwap访问互联网的办法

 

[代码] [Java]代码

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01 //检查网络 是否正常
02     private boolean checkNet(){
03      
04 ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);  
05      
06 netWrokInfo = manager.getActiveNetworkInfo();  
07        if (netWrokInfo == null || !netWrokInfo.isAvailable()) { 
08            Toast.makeText(this, "当前的网络不可用,请开启\n网络", Toast.LENGTH_LONG).show();
09            return false;
10        }
11        else if(netWrokInfo.getTypeName().equals("MOBILE")& netWrokInfo.getExt raInfo().equals("cmwap")){
12            Toast.makeText(this, "cmwap网络不可用,请选择cmnet网络", Toast.LENGTH_LONG).show();
13            return false;
14        }else{
15          
16 return true;
17        }
18     }

[代码] [Java]代码

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01 /**
02 Android 使用cmwap GPRS 方式联网
03 CMWAP和CMNET只是中国移动为其划分的两个GPRS接入方式。中国移动对CMWAP作了一定的限制,主要表现在CMWAP接入时只能访问 GPRS网络内的IP(10.*.*.*),而无法通过路由访问Internet,我们用CMWAP浏览Internet上的网页 就是通过WAP网关协议或它提供的HTTP代理服务实现的。 因此,只有满足以下两个条件的应用 才能在中国移动的CMWAP接入方式下正常工作:
04 1.应用程序 的网络请求基于HTTP协议。
05 2.应用程序 支持HTTP代理协议或WAP网关协议。
06 这也就是为什么我们的G1无法正常用CMWAP的原因。
07 一句话:CMWAP是移动限制的,理论上只能上WAP网,而CMNET可以用GPRS浏览WWW
08 方法一: 
09 */
10 URL url = new URL("http://10.0.0.172/img/baidu_logo.gif");  
11 HttpURLConnection conn = (HttpURLConnection) url.openConnection();  
12 conn.setRequestProperty("X-Online-Host", "www.baidu.com");  
13 conn.setDoInput(true);  
14 conn.connect();  
15 InputStream is = conn.getInputStream();  
16 bitmap = BitmapFactory.decodeStream(is);  
17 is.close();  
18 conn.disconnect();

[代码] [Java]代码

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01 package org.apache.http.examp les.client;
02   
03 import org.apache.http.Header;
04 import org.apache.http.HttpEntity;
05 import org.apache.http.HttpHost;
06 import org.apache.http.HttpResponse;
07 import org.apache.http.client.HttpClient;
08 import org.apache.http.client.methods.HttpGet;
09 import org.apache.http.conn.params.ConnRoutePNames;
10 import org.apache.http.impl.client.DefaultHttpClient;
11 import org.apache.http.util.EntityUtils;
12   
13 public class ClientExecuteProxy {
14   
15     public static void main(String [] args)throws Exception {
16   
17         HttpHost proxy = new HttpHost( "10.0.0.172", 80, "http");
18         HttpHost target = new HttpHost("YOUR_TARGET_IP", 80, "http");        
19   
20         DefaultHttpClient httpclient = new DefaultHttpClient();
21         httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
22   
23           
24         HttpGet req = new HttpGet("/");
25   
26         System.out.println("executing request to " + target + " via " + proxy);
27         HttpResponse rsp = httpclient.execute(target, req);
28         HttpEntity entity = rsp.getEntity();
29   
30         System.out.println("----------------------------------------");
31         System.out.println(rsp.getStatusLine());
32         Header[] headers = rsp.getAllHeaders();
33         for (int i = 0; i<headers.length; i++) {
34             System.out.println(headers);
35         }
36         System.out.println("----------------------------------------");
37   
38         if (entity != null) {
39             System.out.println(EntityUtils.toString(entity));
40         }
41   
42         // When HttpClient instance is no longer needed, 
43         // shut down the connection manager to ensure
44         // immediate deallocation of all system resources
45         httpclient.getConnectionManager().shutdown();        
46     }
47   
48 }

[代码] 在Android上建立GPRS连接

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01 private boolean openDataConnection() {  
02     // Set up data connection.  
03     DataConnection conn = DataConnection.getInstance();          
04     
05         if (connectMode == 0) {  
06             ret = conn.openConnection(mContext, "cmwap", "cmwap", "cmwap");  
07         } else {  
08             ret = conn.openConnection(mContext, "cmnet", "", "");  
09         }  
10     
11 }

[代码] Android 判断网络状态

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01 /*
02  在使用Android连接网络的时候,并不是每次都能连接到网络,在这个时候,我们最好是在程序启动的时候对网络的状态进行一下判断,如果没有网络则进行即时提醒用户进行设置。
03 要判断网络状态,首先需要有相应的权限,下面为权限代码:
04 即允许访问网络状态:
05 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
06 下面为判断代码: 
07 */
08 private boolean NetWorkStatus() {  
09     
10 boolean netSataus = false;  
11         ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);  
12     
13         cwjManager.getActiveNetworkInfo();  
14     
15 if (cwjManager.getActiveNetworkInfo() != null) {  
16             netSataus = cwjManager.getActiveNetworkInfo().isAvailable();  
17         }  
18     
19 if (netSataus) {  
20             Builder b = new AlertDialog.Builder(this).setTitle("没有可用的网络")  
21                     .setMessage("是否对网络进行设置?");  
22             b.setPositiveButton("是", new DialogInterface.OnClickListener() {  
23 public void onClick(DialogInterface dialog, int whichButton) {  
24                     Intent mIntent = new Intent("/");  
25                     ComponentName comp = new ComponentName(  
26 "com.android.settings",  
27 "com.android.settings.WirelessSettings");  
28                     mIntent.setComponent(comp);  
29                     mIntent.setAction("android.intent.action.VIEW");  
30                     startActivityForResult(mIntent,0);  // 如果在设置完成后需要再次进行操作,可以重写操作代码,在这里不再重写  
31                 }  
32             }).setNeutralButton("否", new DialogInterface.OnClickListener() {  
33 public void onClick(DialogInterface dialog, int whichButton) {  
34                     dialog.cancel();  
35                 }  
36             }).show();  
37         }  
38     
39 return netSataus;  
40     }  
41 //通过上面的代码即可完成对网络状态的判断!

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