Android 判斷網絡是GPRS還是WIFI

package com.cwq.receiver;

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

public class ConnectionChangeReceiver extends BroadcastReceiver{

	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		//取得服務
		ConnectivityManager connectivityManager=(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		//Gprs資料
		NetworkInfo mobNetInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
		//WiFi資料
		NetworkInfo wifiNetInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
			if(wifiNetInfo.isConnected()){
				//Toast.makeText(context, "打開WiFi", Toast.LENGTH_SHORT).show();
			}
			else if(mobNetInfo.isConnected()&&!wifiNetInfo.isConnected()){
				//Toast.makeText(context, "打開GPRS且關閉了WiFi", Toast.LENGTH_SHORT).show();
			}
	}

}