[代码] [Java]代码
01//检查网络 是否正常
02 private boolean checkNet(){
03
04ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
05
06netWrokInfo = 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
16return true;
17 }
18 }
[代码] [Java]代码
01/**
02Android 使用cmwap GPRS 方式联网
03CMWAP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:
041.应用程序 的网络请求基于HTTP协议。
052.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*/
10URL url = new URL("http://10.0.0.172/img/baidu_logo.gif");
11HttpURLConnection conn = (HttpURLConnection) url.openConnection();
12conn.setRequestProperty("X-Online-Host", "www.baidu.com");
13conn.setDoInput(true);
14conn.connect();
15InputStream is = conn.getInputStream();
16bitmap = BitmapFactory.decodeStream(is);
17is.close();
18conn.disconnect();
[代码] [Java]代码
01package org.apache.http.examp les.client;
02
03import org.apache.http.Header;
04import org.apache.http.HttpEntity;
05import org.apache.http.HttpHost;
06import org.apache.http.HttpResponse;
07import org.apache.http.client.HttpClient;
08import org.apache.http.client.methods.HttpGet;
09import org.apache.http.conn.params.ConnRoutePNames;
10import org.apache.http.impl.client.DefaultHttpClient;
11import org.apache.http.util.EntityUtils;
12
13public 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
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
01private 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
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
06下面为判断代码:
07*/
08private boolean NetWorkStatus() {
09
10boolean netSataus = false;
11 ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
12
13 cwjManager.getActiveNetworkInfo();
14
15if (cwjManager.getActiveNetworkInfo() != null) {
16 netSataus = cwjManager.getActiveNetworkInfo().isAvailable();
17 }
18
19if (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", newDialogInterface.OnClickListener() {
23public 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", newDialogInterface.OnClickListener() {
33public void onClick(DialogInterface dialog, int whichButton) {
34 dialog.cancel();
35 }
36 }).show();
37 }
38
39return netSataus;
40 }
41//通过上面的代码即可完成对网络状态的判断!