无论是移动、联通还是电信,都至少提供了两种类型的的APN:WAP方式和NET方式。其中NET方式跟WIFI方式一样,无需任何设置,可自由访问所有类型网站,而WAP方式,需要手机先设置代理服务器和端口号等信息,并且只能访问HTTP协议类型的网站。
1) 移动的WAP名称是CMWAP,NET名称是CMNET;
2) 联通的WAP名称是UNIWAP,NET名称是UNINET;联通3G的WAP名称是3GWAP,NET名称是3GNET;
3) 电信的WAP名称是CTWAP,NET名称是CTNET;
其中,移动和联通的WAP代理服务器都是10.0.0.172,端口号是80;而电信的WAP代理服务器是10.0.0.200,端口号是80。
Android系统中,对于APN网络的API是隐藏的,因此获取手机的APN设置,需要通过ContentProvider来进行数据库查询,查询的URI地址是:
取得全部的APN列表:content://telephony/carriers;
取得当前设置的APN:content://telephony/carriers/preferapn;
取得current=1的APN:content://telephony/carriers/current;
下面我们的代码就是获取当前首选的APN设置,并继承HttpClient,实现我们自己的代理HttpClient类。首先来看下APN的管理类的实现,这个类的主要功能是获得APN的代理服务器和端口号,查询用的URI如下:
由这个URI使用ContentResolver获得游标对象,之后就是查询操作了,分别查处当前手机所设置的APN、Proxy和Port,而如果手机的Proxy没有设置,则需要根据APN来决定当前应该连接的代理服务器地址和端口号,详细代码如下所示:
通过APNManager类获取到当前手机的WAP设置的代理和端口之后,就可以构造我们自己的代理HttpClient了,这个类定义为ProxyHttpClient,在该类的构造函数中,首先获得APNManager的实例,然后获取代理服务器proxy和端口值port,通过这两个参数构造HttpHost实例,并将host实例设置为ConnRouteParams.DEFAULT_PROXY的值,详细代码截图如下所示:
APNManager类完整定义如下:
package com.hust.iprai; import android.content.ContentResolver; import android.content.Context; import android.database.Cursor; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.Uri; public class APNManager { public static final Uri PREFERRED_APN_URI; private String mApn; // 接入点名称 private String mPort; // 端口号 private String mProxy; // 代理服务器 private boolean mUseWap; // 是否正在使用WAP static { PREFERRED_APN_URI = Uri.parse("content://telephony/carriers/preferapn"); // 取得当前设置的APN } public APNManager(Context context) { checkNetworkType(context); } /** * 获得当前设置的APN相关参数 * @param context */ private void checkApn(Context context) { ContentResolver contentResolver = context.getContentResolver(); Uri uri = PREFERRED_APN_URI; String[] apnInfo = new String[3]; apnInfo[0] = "apn"; apnInfo[1] = "proxy"; apnInfo[2] = "port"; Cursor cursor = contentResolver.query(uri, apnInfo, null, null, null); if (cursor != null) { while (cursor.moveToFirst()) { this.mApn = cursor.getString(cursor.getColumnIndex("apn")); this.mProxy = cursor.getString(cursor.getColumnIndex("proxy")); this.mPort = cursor.getString(cursor.getColumnIndex("port")); // 代理为空 if ((this.mProxy == null) || (this.mProxy.length() <= 0)) { String apn = this.mApn.toUpperCase(); // 中国移动WAP设置:APN:CMWAP;代理:10.0.0.172;端口:80 // 中国联通WAP设置:APN:UNIWAP;代理:10.0.0.172;端口:80 // 中国联通WAP设置(3G):APN:3GWAP;代理:10.0.0.172;端口:80 if ((apn.equals("CMWAP")) || (apn.equals("UNIWAP")) || (apn.equals("3GWAP"))) { this.mUseWap = true; this.mProxy = "10.0.0.172"; this.mPort = "80"; break; } // 中国电信WAP设置:APN(或者接入点名称):CTWAP;代理:10.0.0.200;端口:80 if (apn.equals("CTWAP")) { this.mUseWap = true; this.mProxy = "10.0.0.200"; this.mPort = "80"; break; } } this.mPort = "80"; this.mUseWap = true; break; } } this.mUseWap = false; cursor.close(); } /** * 检测当前使用的网络类型是WIFI还是WAP * @param context */ private void checkNetworkType(Context context) { NetworkInfo networkInfo = ((ConnectivityManager) context .getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo(); if (networkInfo != null) { if (!"wifi".equals(networkInfo.getTypeName().toLowerCase())) { checkApn(context); return; } this.mUseWap = false; } } /** * 判断当前网络连接状态 * @param context * @return */ public static boolean isNetworkConnected(Context context) { NetworkInfo networkInfo = ((ConnectivityManager) context .getApplicationContext().getSystemService("connectivity")) .getActiveNetworkInfo(); if (networkInfo != null) { return networkInfo.isConnectedOrConnecting(); } return false; } public String getApn() { return this.mApn; } public String getProxy() { return this.mProxy; } public String getProxyPort() { return this.mPort; } public boolean isWapNetwork() { return this.mUseWap; } }
ProxyHttpClient类完整定义如下:
package com.hust.iprai; import android.content.Context; import android.text.TextUtils; import android.util.Log; import org.apache.http.HttpHost; import org.apache.http.conn.params.ConnRouteParams; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.HttpConnectionParams; import org.apache.http.params.HttpParams; import org.apache.http.params.HttpProtocolParams; public class ProxyHttpClient extends DefaultHttpClient { private static final int HTTP_TIMEOUT_MS = 30 * 1000; private static final int BUFFER_SIZE = 1024 * 8; private static final String TAG = ProxyHttpClient.class.getSimpleName(); private RuntimeException mLeakedException = new IllegalStateException("ProxyHttpClient created and never closed"); private String mPort; private String mProxy; private boolean mUseWap; public ProxyHttpClient(Context context) { this(context, null, null); } public ProxyHttpClient(Context context, APNManager manager) { this(context, null, manager); } public ProxyHttpClient(Context context, String userAgent) { this(context, userAgent, null); } public ProxyHttpClient(Context context, String userAgent, APNManager manager) { if (manager == null) { manager = new APNManager(context); } this.mUseWap = manager.isWapNetwork(); this.mProxy = manager.getProxy(); this.mPort = manager.getProxyPort(); if (this.mUseWap) { HttpHost host = new HttpHost(this.mProxy, Integer.valueOf(this.mPort).intValue()); getParams().setParameter(ConnRouteParams.DEFAULT_PROXY, host); // 设置代理 } HttpConnectionParams.setConnectionTimeout(getParams(), HTTP_TIMEOUT_MS); HttpConnectionParams.setSoTimeout(getParams(), HTTP_TIMEOUT_MS); HttpConnectionParams.setSocketBufferSize(getParams(), BUFFER_SIZE); if (!TextUtils.isEmpty(userAgent)) { HttpProtocolParams.setUserAgent(getParams(), userAgent); } } public void close() { if (this.mLeakedException != null) { getConnectionManager().shutdown(); this.mLeakedException = null; } } protected HttpParams createHttpParams() { HttpParams params = super.createHttpParams(); HttpProtocolParams.setUseExpectContinue(params, false); return params; } protected void finalize() throws Throwable { super.finalize(); if (this.mLeakedException != null) { Log.e(TAG, "Leak found", this.mLeakedException); } } }
转自:http://www.cnblogs.com/-OYK/archive/2012/03/17/2403241.html
------------------------------------------------------------------
http://www.cnblogs.com/-OYK/archive/2012/03/17/2403241.html