[无线] 让Android支持cmwap上网

在有中国特色的 GPRS 接入方式背景下，时至今日，我们仍然不得不考虑 cmwap 用户上网的问题；虽然我们暂时找不到关于统计cmwap用户的确切使用比例，但是可以确定的是一些做的比较好的 Android 手机应用绝对不会出现换了 cmwap 就无法网络通信的问题，要解决这个问题其实很简单，考虑两个步骤：1、检测用户手机的设置是否打开了 cmwap。2、使用 Android HttpClient 的代理模式上 cmwap。具体的实现代码如下，希望对有需要的朋友有所帮助。

1、以下是检测手机上网类型的工具类：

import android.content.Context;
import android.database.Cursor;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;

public class HttpUtil {
	
	static public int WAP_INT = 1;
	static public int NET_INT = 2;
	static public int WIFI_INT = 3;
	static public int NONET_INT = 4;
	
	static private Uri APN_URI = null;
	
	static public int getNetType (Context ctx) {
		// has network
		ConnectivityManager conn = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
		if (conn == null) {
			return HttpUtil.NONET_INT;
		}
		NetworkInfo info = conn.getActiveNetworkInfo();
		if (info == null){
			return HttpUtil.NONET_INT;
		}
		// check use wifi
		String type = info.getTypeName();
		if (type.equals("WIFI")) {
			return HttpUtil.WIFI_INT;
		}
		// check use wap
		APN_URI = Uri.parse("content://telephony/carriers/preferapn");
		Cursor uriCursor = ctx.getContentResolver().query(APN_URI, null, null, null, null);
		if (uriCursor != null && uriCursor.moveToFirst()) {
			String proxy = uriCursor.getString(uriCursor.getColumnIndex("proxy"));
			String port = uriCursor.getString(uriCursor.getColumnIndex("port"));
			String apn = uriCursor.getString(uriCursor.getColumnIndex("apn"));
			if (proxy != null && port != null && apn != null && apn.equals("cmwap") && port.equals("80") &&
				(proxy.equals("10.0.0.172") || proxy.equals("010.000.000.172"))) {
				return HttpUtil.WAP_INT;
			}
		}
		return HttpUtil.NET_INT;
	}
	
}

2、以下是我自己封装 HttpClient 的 AppClient 类的部分代码：

... ...

public class AppClient {

	private String apiUrl;
	private HttpParams httpParams;
	private HttpClient httpClient;

	... ...

	public AppClient (String url) {
		initClient(url);
	}

	... ...

	private void initClient (String url) {
		// initialize API URL
		this.apiUrl = url;
		// set client timeout
		httpParams = new BasicHttpParams();
		HttpConnectionParams.setConnectionTimeout(httpParams, timeoutConnection);
		HttpConnectionParams.setSoTimeout(httpParams, timeoutSocket);
		// init client
		httpClient = new DefaultHttpClient(httpParams);
	}

	public void useWap () {
		HttpHost proxy = new HttpHost("10.0.0.172", 80, "http");
		httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
	}

	public String get () throws Exception {
		try {
			HttpGet httpGet = headerFilter(new HttpGet(this.apiUrl));
			HttpResponse httpResponse = httpClient.execute(httpGet);
			if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				String httpResult = resultFilter(httpResponse.getEntity());
				return httpResult;
			} else {
				return null;
			}
		} catch (ConnectTimeoutException e) {
			throw new Exception(C.err.network);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	... ...

}

使用的时候，先用 HttpUtil.getNetType() 获取用户上网方式，如果是 HttpUtil.WAP_INT 的话，则在使用 AppClient 的时候多调用一个 useWap() 方法。示例代码如下：

... ...

AppClient ac = new AppClient(url);
if (HttpUtil.WAP_INT == HttpUtil.getNetType(this)) {
	ac.useWap();
}

... ...

原文链接： http://blog.csdn.net/shagoo/article/details/6967681