android当前网络连接类型判断

package net.nyist.netState;  

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;  

/**@author
 *
 *这是一个判断当前网络状态的工具类
 *
 */
public class netState {
    /**
     *
     * @return 是否有活动的网络连接
     */
    public final boolean hasNetWorkConnection(Context context){
        //获取连接活动管理器
        final ConnectivityManager connectivityManager= (ConnectivityManager) context.
                getSystemService(Context.CONNECTIVITY_SERVICE);
        //获取链接网络信息
        final NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo();  

        return (networkInfo!= null && networkInfo.isAvailable());  

    }
    /**
     * @return 返回boolean ,是否为wifi网络
     *
     */
    public final boolean hasWifiConnection(Context context)
    {
        final ConnectivityManager connectivityManager= (ConnectivityManager) context.
                getSystemService(Context.CONNECTIVITY_SERVICE);
        final NetworkInfo networkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        //是否有网络并且已经连接
        return (networkInfo!=null&& networkInfo.isConnectedOrConnecting());  

    }  

    /**
     * @return 返回boolean,判断网络是否可用,是否为移动网络
     *
     */  

    public final boolean hasGPRSConnection(Context context){
        //获取活动连接管理器
        final ConnectivityManager connectivityManager= (ConnectivityManager) context.
                getSystemService(Context.CONNECTIVITY_SERVICE);
        final NetworkInfo networkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        return (networkInfo!=null && networkInfo.isAvailable());  

    }
    /**
     * @return  判断网络是否可用，并返回网络类型，ConnectivityManager.TYPE_WIFI，ConnectivityManager.TYPE_MOBILE，不可用返回-1
     */
    public static final int getNetWorkConnectionType(Context context){
        final ConnectivityManager connectivityManager=(ConnectivityManager) context.
                getSystemService(Context.CONNECTIVITY_SERVICE);
        final NetworkInfo wifiNetworkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        final NetworkInfo mobileNetworkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);  

        if(wifiNetworkInfo!=null &&wifiNetworkInfo.isAvailable())
        {
            return ConnectivityManager.TYPE_WIFI;
        }
        else if(mobileNetworkInfo!=null &&mobileNetworkInfo.isAvailable())
        {
            return ConnectivityManager.TYPE_MOBILE;
        }
        else {
            return -1;
        }  

    }  

}