Android代码中实现WAP方式联网

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: Android代码中实现WAP方式联网_第1张图片

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:

Android代码中实现WAP方式联网_第2张图片

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
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http://www.cnblogs.com/-OYK/archive/2012/03/17/2403241.html

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