Android判断网络状态

package com.ch.services;

import com.ch.utils.NetWorkUtils;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;
//这是后台 Service
public class CopyOfOffLineService extends Service{

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        //new一个新类 判断网络
        NetWorkUtils netUtils = new NetWorkUtils(getApplicationContext());
        int i = netUtils.netWorkType();//获得当前网络状态类型
       //1.wifi 2.移动网路 3.没网
        if(i == 1){
            //请求数据，并保存
            Log.i("TAG", "开始离线下载......");

        }else if(i == 2){
            Log.i("TAG", "提示是移动数据，是否继续下载......");
        }else{
            Log.i("TAG", "没网，不需要下载......");
        }

        return super.onStartCommand(intent, flags, startId);
    }
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub

        return null;
    }

}

package com.ch.utils;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
import android.util.Log;

public class NetWorkUtils {
    Context mcontext;
    public NetWorkUtils(Context mcontext){
        this.mcontext = mcontext;
    }

    public int netWorkType(){
         //获取管理
        ConnectivityManager mConnectivity = (ConnectivityManager)mcontext.getSystemService(Context.CONNECTIVITY_SERVICE);
        TelephonyManager mTelephony = (TelephonyManager)mcontext.getSystemService(Context.TELEPHONY_SERVICE);
        //检查网络连接
        NetworkInfo info = mConnectivity.getActiveNetworkInfo();   

        if (info == null || !mConnectivity.getBackgroundDataSetting()) {
            Log.i("TAG","网络未连接.....");
            return 3;
        } 

        int netType = info.getType();
        int netSubtype = info.getSubtype();
        Log.i("TAG",netType+",,"+netSubtype+",,"+mTelephony.isNetworkRoaming());
        if (netType == ConnectivityManager.TYPE_WIFI) {  //WIFI
            Log.i("TAG","wifi连接.....");
            return 1;
        } else if (netType == ConnectivityManager.TYPE_MOBILE && netSubtype == TelephonyManager.NETWORK_TYPE_UMTS && !mTelephony.isNetworkRoaming()) {   //MOBILE
            Log.i("TAG","移动数据连接.....");
            return 2;
        }
        return 3;
    }
}